FN Thomson Reuters Web of Science™
VR 1.0
PT J
AU Starling, DJ
Storer, I
Howland, GA
AF Starling, David J.
Storer, Ian
Howland, Gregory A.
TI Compressive sensing spectroscopy with a single pixel camera
SO APPLIED OPTICS
LA English
DT Article
ID HADAMARD; SPECTROMETER; MATRIX; TRANSFORMS
AB Spectrometry requires high spectral resolution and high photometric precision while also balancing cost and complexity. We address these requirements by employing a compressive-sensing camera capable of improving signal acquisition speed and sensitivity in limited signal scenarios. In particular, we implement a fast single pixel spectrophotometer with no moving parts and measure absorption and emission spectra comparable with commercial products. Our method utilizes Hadamard matrices to sample the spectra and then minimizes the total variation of the signal. The experimental setup includes standard optics and a grating, a low-cost digital micromirror device, and an intensity detector. The resulting spectrometer produces a 512 pixel spectrum with low mean-squared error and up to a 90% reduction in data acquisition time when compared with a standard spectrophotometer. (C) 2016 Optical Society of America
C1 [Starling, David J.; Storer, Ian] Penn State Univ, Div Sci, 76 Univ Dr, Hazleton, PA 18229 USA.
[Howland, Gregory A.] Air Force Res Lab, 525 Brooks Rd, Rome, NY 13441 USA.
RP Starling, DJ (reprint author), Penn State Univ, Div Sci, 76 Univ Dr, Hazleton, PA 18229 USA.
EM starling@psu.edu
FU Air Force Office of Scientific Research (AFOSR) [LRIR 14RI02COR];
National Academy of Sciences (NAS) (NRC Associateship); Pennsylvania
State University (PSU) (Research Development Grant)
FX Air Force Office of Scientific Research (AFOSR) (LRIR 14RI02COR);
National Academy of Sciences (NAS) (NRC Associateship); Pennsylvania
State University (PSU) (Research Development Grant).
NR 30
TC 0
Z9 0
U1 13
U2 13
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1559-128X
EI 2155-3165
J9 APPL OPTICS
JI Appl. Optics
PD JUL 1
PY 2016
VL 55
IS 19
BP 5198
EP 5202
DI 10.1364/AO.55.005198
PG 5
WC Optics
SC Optics
GA DR1TH
UT WOS:000379687300033
PM 27409210
ER
PT J
AU Myers, D
Batta, R
Karwan, M
AF Myers, David
Batta, Rajan
Karwan, Mark
TI A real-time network approach for including obstacles and flight dynamics
in UAV route planning
SO JOURNAL OF DEFENSE MODELING AND SIMULATION-APPLICATIONS METHODOLOGY
TECHNOLOGY-JDMS
LA English
DT Article
DE Unmanned systems; network methods modeling obstacles; flight time
calculation
ID UNMANNED AERIAL VEHICLES; EUCLIDEAN SHORTEST PATHS; BARRIERS;
ENVIRONMENT; GENERATION; ASSIGNMENT; OPERATIONS; ALGORITHM; AIRCRAFT;
PLANE
AB The procedure presented within considers the problem of calculating flight time for unmanned aerial vehicles (UAVs) while incorporating a subset of important flight dynamics characteristics in an operational field that contains obstacles. These flight time calculations are parameter inputs in mission planning and dynamic reassignment problems. The addition of pseudonodes and the addition of penalties into the associated edge weights are the basis for how the network generation procedure includes flight dynamics. The procedure includes a method for handling pop-up targets or obstacles in a dynamic reassignment problem. To guarantee that the optimal path includes flight dynamics, a selective Dijkstra's algorithm computes the shortest path. A complex mission plan consisting of thirty targets and three obstacles is the largest test scenario of nine developed scenarios. Our network generation procedure, along with the shortest path calculations of all 992 node pairs of interest, solves in approximately one second. This procedure allows for the fast computation needed to generate parameters for use in a dynamic domain such as mission planning and dynamic reassignment algorithms.
C1 [Myers, David] US Air Force, Res Lab, Rome, NY USA.
[Batta, Rajan; Karwan, Mark] SUNY Buffalo, Dept Ind & Syst Engn, 410 Bell Hall, Buffalo, NY 14260 USA.
RP Batta, R (reprint author), SUNY Buffalo, Dept Ind & Syst Engn, 410 Bell Hall, Buffalo, NY 14260 USA.
EM batta@buffalo.edu
NR 48
TC 0
Z9 0
U1 8
U2 8
PU SAGE PUBLICATIONS INC
PI THOUSAND OAKS
PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 USA
SN 1548-5129
EI 1557-380X
J9 J DEF MODEL SIMUL-AP
JI J. Def. Model. Simul.-Appl. Methodol. Technol.-JDMS
PD JUL
PY 2016
VL 13
IS 3
BP 291
EP 306
DI 10.1177/1548512916630183
PG 16
WC Engineering, Multidisciplinary
SC Engineering
GA DR3VO
UT WOS:000379830900003
ER
PT J
AU Connors, CD
Miller, JO
Lunday, BJ
AF Connors, Casey D.
Miller, J. O.
Lunday, Brian J.
TI Using agent-based modeling and a designed experiment to simulate and
analyze a new air-to-air missile
SO JOURNAL OF DEFENSE MODELING AND SIMULATION-APPLICATIONS METHODOLOGY
TECHNOLOGY-JDMS
LA English
DT Article
DE agent-based modeling; simulation; combat modeling; weapons systems
analysis; design of experiments
AB New weapons system analysis is a field with much interest and study due to the enduring requirement for militaries to improve their set of tactical capabilities. Moreover, as development, testing, fielding, and employment of any new weapon system can be quite costly, justifications of acquisition decisions must be deliberate and thorough to improve necessary capabilities at the least possible cost. Informing these decisions, via analyses of the weapons systems' benefits and costs, yields better decisions. Our goal herein is to demonstrate a sound methodology to efficiently attain information about the potential benefits, known as key performance parameters (KPPs), of a particular weapon system. Utilizing a simple, unclassified scenario, we identify benefits that the small advanced capability missile (SACM) concept provides, and we demonstrate a basis for further investigation into the tactics used to leverage its capabilities. Within this study, we substitute unclassified data from Lockheed Martin's Cuda prototype for the SACM concept. Furthermore, we discuss how each of the chosen study factors influences the air combat scenario. Ultimately, we establish the usefulness of a designed experimental approach to analysis of agent-based combat simulation models, which yields useful insights during the acquisition process about the complex interactions of different actors on the battlefield.
C1 [Connors, Casey D.; Miller, J. O.; Lunday, Brian J.] US Air Force, Inst Technol, Grad Sch Engn & Management, Dept Operat Sci, AFIT ENS,2950 HobsonWay, Wright Patterson AFB, OH USA.
RP Miller, JO (reprint author), US Air Force, Inst Technol, Grad Sch Engn & Management, Dept Operat Sci, AFIT ENS,2950 HobsonWay, Wright Patterson AFB, OH USA.
EM john.miller@afit.edu
NR 22
TC 0
Z9 0
U1 0
U2 0
PU SAGE PUBLICATIONS INC
PI THOUSAND OAKS
PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 USA
SN 1548-5129
EI 1557-380X
J9 J DEF MODEL SIMUL-AP
JI J. Def. Model. Simul.-Appl. Methodol. Technol.-JDMS
PD JUL
PY 2016
VL 13
IS 3
BP 321
EP 330
DI 10.1177/1548512915616873
PG 10
WC Engineering, Multidisciplinary
SC Engineering
GA DR3VO
UT WOS:000379830900005
ER
PT J
AU Peifer, DC
AF Peifer, Douglas Carl
TI German Historians and the Bombing of German Cities: The Contested Air
War
SO JOURNAL OF MILITARY HISTORY
LA English
DT Book Review
C1 [Peifer, Douglas Carl] US Air War Coll, Montgomery, AL 36112 USA.
RP Peifer, DC (reprint author), US Air War Coll, Montgomery, AL 36112 USA.
NR 1
TC 0
Z9 0
U1 0
U2 0
PU SOC MILITARY HISTORY
PI LEXINGTON
PA C/O VIRGINIA MILITARY INST, GEORGE C MARSHALL LIBRARY, LEXINGTON, VA
24450-1600 USA
SN 0899-3718
EI 1543-7795
J9 J MILITARY HIST
JI J. Mil. Hist.
PD JUL
PY 2016
VL 80
IS 3
BP 942
EP 943
PG 2
WC History
SC History
GA DQ5ZK
UT WOS:000379283600056
ER
PT J
AU Deters, D
Fowler, SL
Orozco, R
Smith, PR
Spurlock, S
Blackmon, D
Thomas, S
AF Deters, Darlene
Fowler, Stephanie L.
Orozco, Raymundo
Smith, Patrick R.
Spurlock, Shelby
Blackmon, Darlene
Thomas, Samantha
TI Myasthenia Gravis Presentation After a Cervical Laminectomy With Fusion
SO DIMENSIONS OF CRITICAL CARE NURSING
LA English
DT Article
DE Myasthenia gravis crisis; Neurology; Progressive weakness
AB Myasthenia gravis is a chronic neuromuscular disorder that causes skeletal muscle weakness. Typically, myasthenia gravis affects the ocular, bulbar, neck, proximal limbs, and respiratory muscles. Although the presentation is typically observed with complaints of vision and bulbar symptoms such as diplopia, dystonia, and dysphagia, this article presents a case study of an elderly man with a history of increasing upper extremity weakness with complaints of worsening hand dexterity and intermittent episodes of expressive aphasia. After cervical laminectomy with fusion, this gentleman was admitted to the medical intensive care unit, in a complete myasthenic crisis.
C1 [Deters, Darlene] San Antonio Mil Med Ctr, Ctr Nursing Sci & Clin Inquiry, Joint Base Ft Sam Houston, Ft Sam Houston, TX USA.
[Fowler, Stephanie L.; Orozco, Raymundo; Smith, Patrick R.; Spurlock, Shelby; Blackmon, Darlene; Thomas, Samantha] San Antonio Mil Med Ctr, Crit Care Nursing Serv, Joint Base Ft Sam Houston, Ft Sam Houston, TX USA.
[Orozco, Raymundo; Smith, Patrick R.] US Army, Washington, DC USA.
[Thomas, Samantha] US Air Force, Washington, DC USA.
RP Deters, D (reprint author), 3551 Roger Brooke Dr, Ft Sam Houston, TX 78234 USA.
EM darlene.r.deters.civ@mail.mil
NR 11
TC 0
Z9 0
U1 0
U2 0
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA TWO COMMERCE SQ, 2001 MARKET ST, PHILADELPHIA, PA 19103 USA
SN 0730-4625
EI 1538-8646
J9 DIMENS CRIT CARE NUR
JI Dimens. Crit. Care Nurs.
PD JUL-AUG
PY 2016
VL 35
IS 4
BP 190
EP 194
DI 10.1097/DCC.0000000000000189
PG 5
WC Nursing
SC Nursing
GA DQ3TT
UT WOS:000379127000004
PM 27258955
ER
PT J
AU Barnes, CJ
Visbal, MR
Huang, PG
AF Barnes, C. J.
Visbal, M. R.
Huang, P. G.
TI On the effects of vertical offset and core structure in
streamwise-oriented vortex-wing interactions
SO JOURNAL OF FLUID MECHANICS
LA English
DT Article
DE flow-structure interactions; vortex instability; vortex interactions
ID LARGE-EDDY SIMULATION; FORMATION FLIGHT; VORTICES; BREAKDOWN; SCHEMES;
EQUATIONS; FLOWS; PLATE; FIN
AB This article explores the three-dimensional flow structure of a streamwise-oriented vortex incident on a finite aspect-ratio wing. The vertical positioning of the incident vortex relative to the wing is shown to have a significant impact on the unsteady flow structure. A direct impingement of the streamwise vortex produces a spiralling instability in the vortex just upstream of the leading edge, reminiscent of the helical instability modes of a Batchelor vortex. A small negative vertical offset develops a more pronounced instability while a positive vertical offset removes the instability altogether. These differences in vertical position are a consequence of the upstream influence of pressure gradients provided by the wing. Direct impingement or a negative vertical offset subject the vortex to an adverse pressure gradient that leads to a reduced axial velocity and diminished swirl conducive to hydrodynamic instability. Conversely, a positive vertical offset removes instability by placing the streamwise vortex in line with a favourable pressure gradient, thereby enhancing swirl and inhibiting the growth of unstable modes. In every case, the helical instability only occurs when the properties of the incident vortex fall within the instability threshold predicted by linear stability theory. The influence of pressure gradients associated with separation and stall downstream also have the potential to introduce suction-side instabilities for a positive vertical offset. The influence of the wing is more severe for larger vortices and diminishes with vortex size due to weaker interaction and increased viscous stability. Helical instability is not the only possible outcome in a direct impingement. Jet-like vortices and a higher swirl ratio in wake-like vortices can retain stability upon impact, resulting in the laminar vortex splitting over either side of the wing.
C1 [Barnes, C. J.; Visbal, M. R.] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Huang, P. G.] Wright State Univ, Dept Mech & Mat Engn, Dayton, OH 45435 USA.
RP Barnes, CJ (reprint author), Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
EM caleb.barnes.1@us.af.mil
FU AFOSR
FX This work was supported in part by AFOSR under a task monitored by Dr D.
Smith, and by a grant of HPC time from the DoD HPC Major Shared Resource
Center at AFRL, WPAFB.
NR 51
TC 0
Z9 0
U1 4
U2 4
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 0022-1120
EI 1469-7645
J9 J FLUID MECH
JI J. Fluid Mech.
PD JUL
PY 2016
VL 799
BP 128
EP 158
DI 10.1017/jfm.2016.320
PG 31
WC Mechanics; Physics, Fluids & Plasmas
SC Mechanics; Physics
GA DQ3YX
UT WOS:000379141100011
ER
PT J
AU Pilmanis, AA
Balldin, UI
Fischer, JR
AF Pilmanis, Andrew A.
Balldin, Ulf I.
Fischer, Joseph R.
TI Cognition Effects of Low-Grade Hypoxia
SO AEROSPACE MEDICINE AND HUMAN PERFORMANCE
LA English
DT Article
DE cognition; performance; hypoxia
ID MILD ACUTE HYPOXIA; MENTAL PERFORMANCE; 8,000 FEET; ALTITUDE
AB INTRODUCTION: The effects of low-grade hypoxia on cognitive function are reported in this paper. The study compared cognitive function during short exposures at four different altitudes.
METHODS: Ninety-one subjects were exposed to simulated altitudes of ground level, 1524, 2438, and 3658 m (5000, 8000, and 12,000 ft) in the Brooks City-Base altitude pressure chamber in a balanced design. Oxygen saturation, heart rate, and cognitive performance on seven different cognitive tasks were measured. In addition, subjects indicated their symptoms from a 33-item subjective symptom survey.
RESULTS: As designed, oxygen saturation decreased and heart rate increased with higher altitudes. Very small degradations in performance were found at the two highest altitudes for only two of the cognitive tasks (continuous performance and grammatical reasoning). In the subjective symptom survey, 18 of the 33 possible symptoms were more common at 3658 m (12,000 ft) than at ground level.
CONCLUSIONS: The findings indicated a minimal influence of low-grade hypoxia on cognitive performance in contrast to some existing classic symptoms of hypoxia.
C1 US Air Force Res Lab, Brooks City Base, TX USA.
[Pilmanis, Andrew A.; Balldin, Ulf I.; Fischer, Joseph R.] Wyle Sci Engn & Technol Grp, Brooks City Base, TX USA.
RP Pilmanis, AA (reprint author), 464 Coffee Circle, Pottsboro, TX 75076 USA.
EM apilmanis@aol.com
FU Air Force Research Laboratory [FA 8650-04-D-6472 TO]; U.S. Air Force
School of Aerospace Medicine contract, Brooks City-Base, TX
[FA8650-12-D-6280]
FX This research was sponsored, in part, by the Air Force Research
Laboratory, Contract FA 8650-04-D-6472 TO#1, and U.S. Air Force School
of Aerospace Medicine contract FA8650-12-D-6280, Brooks City-Base, TX.
NR 17
TC 0
Z9 0
U1 2
U2 2
PU AEROSPACE MEDICAL ASSOC
PI ALEXANDRIA
PA 320 S HENRY ST, ALEXANDRIA, VA 22314-3579 USA
SN 2375-6314
EI 2375-6322
J9 AEROSP MED HUM PERF
JI Aerosp. Med.Hum. Perform.
PD JUL
PY 2016
VL 87
IS 7
BP 596
EP 603
DI 10.3357/AMHP.4558.2016
PG 8
WC Biophysics; Public, Environmental & Occupational Health; Medicine,
Research & Experimental
SC Biophysics; Public, Environmental & Occupational Health; Research &
Experimental Medicine
GA DP4LB
UT WOS:000378466300002
PM 27503038
ER
PT J
AU Enloe, CL
Mangina, RS
Font, GI
AF Enloe, C. L.
Mangina, R. S.
Font, G. I.
TI Normalized Electronegative Species Effects in the
Dielectric-Barrier-Discharge Plasma Actuator
SO AIAA JOURNAL
LA English
DT Article
AB Time-resolved and time-averaged net force (electrohydrodynamic force plus viscous drag) are presented for a dielectric-barrier-discharge-based aerodynamic plasma actuator operated in artificial atmospheres composed of nitrogen (N-2) with various concentrations of electronegative gasses: 1-20% oxygen (O-2) and 0.01-0.34% sulfur hexafluoride (SF6). It is possible to deconvolve and isolate the role of oxygen to the negative-going or forward stroke of the discharge and to the region of parameter space with high E/n: a change in oxygen content by a factor of 20 yields only a 20% increase in force produced when 12 kV AC is applied to the system but yields a 170% increase when the voltage amplitude is increased by less than a factor of 2, to 20 kV applied. It is shown that substituting SF6 for O-2 produces a mild net increase in force production that saturates at very low SF6 concentrations (0.1%) and that the increase is limited because of substantial (50%) losses of the momentum to drag even though the momentum input is increased by a factor of 2.
C1 [Enloe, C. L.; Mangina, R. S.; Font, G. I.] US Air Force Acad, Dept Phys, Colorado Springs, CO 80840 USA.
RP Enloe, CL (reprint author), US Air Force Acad, Dept Phys, Colorado Springs, CO 80840 USA.
NR 19
TC 0
Z9 0
U1 4
U2 4
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0001-1452
EI 1533-385X
J9 AIAA J
JI AIAA J.
PD JUL
PY 2016
VL 54
IS 7
BP 2061
EP 2068
DI 10.2514/1.J054551
PG 8
WC Engineering, Aerospace
SC Engineering
GA DP5FN
UT WOS:000378521600004
ER
PT J
AU Leger, T
Bisek, N
Poggie, J
AF Leger, Timothy
Bisek, Nicholas
Poggie, Jonathan
TI Supersonic Corner Flow Predictions Using the Quadratic Constitutive
Relation
SO AIAA JOURNAL
LA English
DT Article
ID LARGE-EDDY SIMULATION; DIRECT NUMERICAL-SIMULATION; NAVIER-STOKES
EQUATIONS; TURBULENT-FLOW; SQUARE DUCT; LINE RELAXATION; MODELS
AB A series of Reynolds-averaged Navier-Stokes simulations is performed for a supersonic wall-bounded turbulent corner flow. These simulations are compared to a high-order implicit large-eddy simulation for the same geometry and flow conditions. Inclusion of the quadratic constitutive relation in the Reynolds-averaged Navier-Stokes simulation results in significant improvement in qualitative agreement with the large-eddy simulation: specifically, the presence of secondary flow (a counter-rotating vortex pair). The range of valid values for the constant in the quadratic constitutive relation formulation is explored. Additionally, the effects on this range from different turbulence models and momentum thickness Reynolds numbers for the corner are also examined. These effects of the quadratic constitutive relation are explored using both the finite difference fluid solver OVERFLOW and the finite volume fluid solver US3D. The results indicate that the quadratic constitutive relation term directly affects the strength of the vortex pair in the secondary flow and that its influence appears directly dependent on all the aforementioned parameters.
C1 [Leger, Timothy; Bisek, Nicholas] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Poggie, Jonathan] Purdue Univ, Sch Aeronaut & Astronaut, W Lafayette, IN 47907 USA.
[Leger, Timothy] Ohio Aerosp Inst, Beavercreek, OH 45431 USA.
RP Leger, T (reprint author), US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
EM timothy.leger.ctr@us.af.mil
FU U.S. Air Force Office of Scientific Research (AFOSR) [14RQ18COR,
16RQCOR373]
FX This project was funded in part by U.S. Air Force Office of Scientific
Research (AFOSR) contract LRIR tasks 14RQ18COR and 16RQCOR373, monitored
by I. Leyva. The authors wish to thank the U.S. Air Force Research
Laboratory Department of Defense Supercomputing Resource Center for
computer time and G. Candler for the use of the US3D solver. Additional
computer hours were provided under a U.S. Department of Defense High
Performance Computing Modernization Program Frontier Project (R. Gosse,
Principal Investigator).
NR 37
TC 0
Z9 0
U1 4
U2 4
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0001-1452
EI 1533-385X
J9 AIAA J
JI AIAA J.
PD JUL
PY 2016
VL 54
IS 7
BP 2077
EP 2088
DI 10.2514/1.J054732
PG 12
WC Engineering, Aerospace
SC Engineering
GA DP5FN
UT WOS:000378521600006
ER
PT J
AU Bae, HR
Alyanak, E
AF Bae, Ha-Rok
Alyanak, Ed
TI Sequential Subspace Reliability Method with Univariate Revolving
Integration
SO AIAA JOURNAL
LA English
DT Article
ID POLYNOMIAL CHAOS EXPANSION; DIMENSION-REDUCTION METHOD; DESIGN
OPTIMIZATION; DECOMPOSITION; 1ST-ORDER; SYSTEMS; CODE
AB A new computational framework called the sequential subspace reliability method (SSRM) is presented. This method decomposes the multidimensional random space into multiple two-dimensional subspaces. In this manner, SSRM is able to approximate bivariate interaction effects. When the reliability estimate contribution is calculated subspace by subspace, the final assessment is updated in a progressive manner. The iterative history of sequential reliability assessment can be used to understand the complexity and convergence behavior of the limit state function of interest. In a decision-making situation, the flexibility of the proposed SSRM to provide iterative updates on reliability estimation becomes especially valuable in dealing with large-scale and complex problems under the constraints of limited time and resources. To calculate the individual subspace contributions, a novel univariate revolving integration (URI) method is proposed. The URI method takes advantage of the axisymmetric nature of a joint probability density function and provides an additional layer of flexibility in updating the reliability contribution within each subspace. This flexibility allows the estimation of bivariate and high-order effects to be addressed if resources allow. Additionally, URI is composed of multiple one-dimensional integrals that allow the use of regression models to be used with high confidence. The computational benefits of using the proposed method is demonstrated with several numerical examples of mathematical, structural, and an aircraft conceptual sizing problem.
C1 [Bae, Ha-Rok] Wright State Univ, Dept Mech & Mat Engn, Dayton, OH 45435 USA.
[Alyanak, Ed] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Bae, HR (reprint author), Wright State Univ, Dept Mech & Mat Engn, Dayton, OH 45435 USA.
NR 40
TC 0
Z9 0
U1 1
U2 1
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0001-1452
EI 1533-385X
J9 AIAA J
JI AIAA J.
PD JUL
PY 2016
VL 54
IS 7
BP 2160
EP 2170
DI 10.2514/1.J054646
PG 11
WC Engineering, Aerospace
SC Engineering
GA DP5FN
UT WOS:000378521600012
ER
PT J
AU Houk, T
DiSilvestro, R
Jensen, M
AF Houk, Timothy
DiSilvestro, Russell
Jensen, Mark
TI Smoke and Mirrors: Subverting Rationality, Positive Freedom, and Their
Relevance to Nudging and/or Smoking Policies
SO AMERICAN JOURNAL OF BIOETHICS
LA English
DT Editorial Material
C1 [Houk, Timothy] Univ Calif Davis, Davis, CA 95616 USA.
[DiSilvestro, Russell] Calif State Univ Sacramento, Sacramento, CA 95819 USA.
[Jensen, Mark] US Air Force Acad, Colorado Springs, CO 80840 USA.
RP DiSilvestro, R (reprint author), Calif State Univ Sacramento, Dept Philosophy, 3030 Mendocino Hall,6000 J St, Sacramento, CA 95819 USA.
EM rdisilv@csus.edu
NR 7
TC 1
Z9 1
U1 4
U2 5
PU ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD
PI ABINGDON
PA 2-4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1526-5161
EI 1536-0075
J9 AM J BIOETHICS
JI Am. J. Bioeth.
PD JUL
PY 2016
VL 16
IS 7
BP 20
EP 22
DI 10.1080/15265161.2016.1180452
PG 3
WC Ethics; Medical Ethics; Social Issues; Social Sciences, Biomedical
SC Social Sciences - Other Topics; Medical Ethics; Social Issues;
Biomedical Social Sciences
GA DP5VS
UT WOS:000378566900007
PM 27292841
ER
PT J
AU Windom, B
Won, SH
Reuter, CB
Jiang, B
Ju, YG
Hammack, S
Ombrello, T
Carter, C
AF Windom, Bret
Won, Sang Hee
Reuter, Christopher B.
Jiang, Bo
Ju, Yiguang
Hammack, Stephen
Ombrello, Timothy
Carter, Campbell
TI Study of ignition chemistry on turbulent premixed flames of
n-heptane/air by using a reactor assisted turbulent slot burner
SO COMBUSTION AND FLAME
LA English
DT Article
DE Turbulent burning velocity; kHz LIF diagnostic; Low temperature
ignition; Flashback; n-Heptane
ID SMALL-SCALE TURBULENCE; BURNING VELOCITY; ELEVATED PRESSURES;
HYDROCARBON FUELS; AIR MIXTURES; COMBUSTION; PROPAGATION; SIMULATIONS;
TEMPERATURE; FLASHBACK
AB The changes in flame structure and burning velocity of premixed n-heptane/air flames associated with ignition chemistry have been investigated in a reactor-assisted turbulent slot (RATS) burner. Two distinct turbulent flame regimes are identified by varying the flow residence time and reactor temperature. A chemically frozen (CF) regime is observed at a reactor temperature of 450 K and a low-temperature ignition (LTI) regime is identified at 650 K. At a reactor temperature of 450 K, the measured turbulent burning velocities (S-T) exhibit a monotonic trend, proportional only to the turbulent intensity and laminar flame speed (S-L) calculated with the initial fuel/air mixture. At a reactor temperature of 650 K, S-T initially decreases with increasing flow residence times (decreasing turbulent intensity) but then increases once the reactor flow residence time exceeds the LTI delay. Furthermore, S-T in the LTI regime exhibits a strong correlation with the extent of low-temperature reactivity (defined by CH2O concentration). The species distributions at the exit of the RATS burner after the onset of LTI are quantified by gas sampling chromatography and used to compute the changes in Si, and mixture Lewis number (Le), which are shown to substantially change after the onset of LTI. Damkohler's scaling analysis indicates that the increase in S-T in the LTI regime originates from an increase in S-L, a decrease in Le, and an increase in turbulence intensity due to the heat release from the low-temperature chemistry. To examine the role of ignition chemistry on flame stability, flame flashback measurements have been performed by varying mean jet velocities and n-heptaneiair mixture equivalence ratios for reactor temperatures of 450 and 650 K. Measurements at 650 K imply the strong influence of high-temperature ignition on flame stability phenomena. (C) 2016 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
C1 [Windom, Bret; Won, Sang Hee; Reuter, Christopher B.; Jiang, Bo; Ju, Yiguang] Princeton Univ, Dept Mech & Aerosp Engn, Princeton, NJ 08544 USA.
[Windom, Bret] Univ Colorado, Dept Mech & Aerosp Engn, Colorado Springs, CO 80918 USA.
[Jiang, Bo] Nanjing Univ Aeronaut & Astronaut, Coll Energy & Power Engn, Nanjing 210016, Jiangsu, Peoples R China.
[Hammack, Stephen] Univ Illinois, Dept Mech Sci & Engn, Urbana, IL 61801 USA.
[Ombrello, Timothy; Carter, Campbell] US Air Force, Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
RP Won, SH (reprint author), Princeton Univ, Dept Mech & Aerosp Engn, Princeton, NJ 08544 USA.
EM sangwon@princeton.edu
FU AFOSR Research Grant [FA9550-12-1-0140]; Air Force Research Laboratory,
Aerospace Systems Directorate; China Scholarship Council
FX This work was supported by the AFOSR Research Grant FA9550-12-1-0140 and
by the Air Force Research Laboratory, Aerospace Systems Directorate. BJ
was supported by the China Scholarship Council. The authors sincerely
thank Prof. Tonghun Lee (University of Illinois at Urbana Champaign) for
help with kHz PLIF measurements.
NR 46
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U1 9
U2 12
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0010-2180
EI 1556-2921
J9 COMBUST FLAME
JI Combust. Flame
PD JUL
PY 2016
VL 169
BP 19
EP 29
DI 10.1016/j.combustflame.2016.02.031
PG 11
WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary;
Engineering, Chemical; Engineering, Mechanical
SC Thermodynamics; Energy & Fuels; Engineering
GA DP6CD
UT WOS:000378583600003
ER
PT J
AU Stough, LM
Sharp, AN
Resch, JA
Decker, C
Wilker, N
AF Stough, Laura M.
Sharp, Amy N.
Resch, J. Aaron
Decker, Curt
Wilker, Nachama
TI Barriers to the long-term recovery of individuals with disabilities
following a disaster
SO DISASTERS
LA English
DT Article
DE disability; disaster; Hurricane Katrina; recovery
ID HURRICANE KATRINA; VULNERABILITY; POPULATIONS; CHILDREN; NEEDS
AB This study examines how pre-existing disabling conditions influenced the recovery process of survivors of Hurricane Katrina. It focuses specifically on the barriers that hindered the recovery process in these individuals. Focus groups were convened in four Gulf Coast states with 31 individuals with disabilities who lived in or around New Orleans, Louisiana, prior to Hurricane Katrina in August 2005. Qualitative data were analysed using grounded theory methodology. Five themes emerged as the most significant barriers to recovery: housing; transportation; employment; physical and mental health; and accessing recovery services. While these barriers to recovery were probably common to most survivors of the disaster, the research results suggest that disability status enhanced the challenges that participants experienced in negotiating the recovery process and in acquiring resources that accommodated their disabilities. The findings indicate that, when disaster recovery services and resources did not accommodate the needs of individuals with disabilities, recovery was hindered. Recovery efforts should include building accessible infrastructure and services that will allow for participation by all.
C1 [Stough, Laura M.] Texas A&M Univ, Educ Psychol, College Stn, TX 77843 USA.
[Stough, Laura M.; Sharp, Amy N.] Texas A&M Univ, Ctr Disabil & Dev, College Stn, TX 77843 USA.
[Resch, J. Aaron] US Air Force, Colorado Springs, CO USA.
[Decker, Curt; Wilker, Nachama] Natl Disabil Rights Network, Washington, DC USA.
[Wilker, Nachama] Natl Disabil Rights Network, Training, Washington, DC USA.
RP Stough, LM (reprint author), Texas A&M Univ, Dept Educ Psychol, Mail Stop 4225, College Stn, TX 77840 USA.
EM lstough@tamu.edu
FU Katrina Aid Today programme
FX Preparation of this manuscript was supported in part by a grant to the
National Disability Rights Network from the Katrina Aid Today programme.
The authors gratefully acknowledge the contributions of Christina Knight
to this research. Data analysed for this manuscript was collected as
part of an evaluation of the Katrina Aid Today programme.
NR 65
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U1 13
U2 16
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0361-3666
EI 1467-7717
J9 DISASTERS
JI Disasters
PD JUL
PY 2016
VL 40
IS 3
BP 387
EP 410
DI 10.1111/disa.12161
PG 24
WC Planning & Development
SC Public Administration
GA DP5VK
UT WOS:000378565900002
PM 26577837
ER
PT J
AU Chen, FS
Shen, LX
Suter, BW
AF Chen, Feishe
Shen, Lixin
Suter, Bruce W.
TI Computing the proximity operator of the (p) norm with 0 < p < 1
SO IET SIGNAL PROCESSING
LA English
DT Article
DE image coding; image restoration; Newton method; proximity operator;
sparse modelling; soft-thresholding estimators; hard-thresholding
estimators; iterative Newton method; (p)-regularisation; compressive
sensing; image restoration
ID DECOMPOSITION
AB Sparse modelling with the (p) norm of 0 p 1 requires the availability of the proximity operator of the (p) norm. The proximity operators of the (0) and (1) norms are the well-known hard- and soft-thresholding estimators, respectively. In this study, the authors give a complete study on the properties of the proximity operator of the (p) norm. Based on these properties, explicit formulas of the proximity operators of the (1/2) norm and (2/3) norm are derived with simple proofs; for other values of p, an iterative Newton's method is developed to compute the proximity operator of the (p) norm by fully exploring the available proximity operators of the (0), (1/2), (2/3), and (1) norms. As applications, the proximity operator of the (p) norm with 0 p 1 is applied to the (p)-regularisation for compressive sensing and image restoration.
C1 [Chen, Feishe; Shen, Lixin] Syracuse Univ, Dept Math, Syracuse, NY 13244 USA.
[Suter, Bruce W.] Air Force Res Lab, AFRL RITB, Rome, NY 13441 USA.
RP Shen, LX (reprint author), Syracuse Univ, Dept Math, Syracuse, NY 13244 USA.
EM lshen03@syr.edu
FU National Research Council via the Air Force Office of Scientific
Research; US National Science Foundation [DMS-1115523, DMS-1522332]
FX This research was supported in part by an award from the National
Research Council via the Air Force Office of Scientific Research and by
the US National Science Foundation under grants DMS-1115523 and
DMS-1522332.
NR 21
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U1 2
U2 2
PU INST ENGINEERING TECHNOLOGY-IET
PI HERTFORD
PA MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTFORD SG1 2AY, ENGLAND
SN 1751-9675
EI 1751-9683
J9 IET SIGNAL PROCESS
JI IET Signal Process.
PD JUL
PY 2016
VL 10
IS 5
BP 557
EP 565
DI 10.1049/iet-spr.2015.0244
PG 9
WC Engineering, Electrical & Electronic
SC Engineering
GA DP8CF
UT WOS:000378724800016
ER
PT J
AU Sabelkin, V
Mall, S
Cook, TS
Fish, J
AF Sabelkin, V.
Mall, S.
Cook, T. S.
Fish, J.
TI Fatigue and creep behaviors of a SiC/SiC composite under combustion and
laboratory environments
SO JOURNAL OF COMPOSITE MATERIALS
LA English
DT Article
DE Ceramic-matrix composites; high-temperature mechanical testing; creep;
fatigue; combustion and laboratory environment
ID SIC-MATRIX COMPOSITES; CHEMICAL-VAPOR INFILTRATION
AB A ceramic-matrix composite, consisting of five-harness satin Hi-Nicalon fiber in silicon carbide matrix prepared by slurry melt infiltration method, was characterized for tension-tension fatigue and creep behaviors under the combustion and laboratory environments at 1205?. There was about 100 times reduction in fatigue life under the combustion environment in comparison to the laboratory environment. There was about 50 times reduction in the creep life under the combustion environment in comparison to the laboratory environment. The combustion caused more embrittlement in the tested CMC than the laboratory environment, and it was more in fatigue than creep under the combustion environment only.
C1 [Sabelkin, V.; Mall, S.] US Air Force, Inst Technol, Dept Aeronaut & Astronaut, Bldg 640,2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
[Cook, T. S.] Rolls Royce Corp, Design Syst Engn, Indianapolis, IN USA.
[Fish, J.] Columbia Univ, Dept Civil Engn & Engn Mech, New York, NY 10027 USA.
RP Mall, S (reprint author), US Air Force, Inst Technol, Dept Aeronaut & Astronaut, Bldg 640,2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM Shankar.Mall@afit.edu
NR 24
TC 0
Z9 0
U1 12
U2 19
PU SAGE PUBLICATIONS LTD
PI LONDON
PA 1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLAND
SN 0021-9983
EI 1530-793X
J9 J COMPOS MATER
JI J. Compos Mater.
PD JUL
PY 2016
VL 50
IS 16
BP 2145
EP 2153
DI 10.1177/0021998315602323
PG 9
WC Materials Science, Composites
SC Materials Science
GA DP5RF
UT WOS:000378554400001
ER
PT J
AU MacKunis, W
Leve, F
Patre, PM
Fitz-Coy, N
Dixon, WE
AF MacKunis, W.
Leve, F.
Patre, P. M.
Fitz-Coy, N.
Dixon, W. E.
TI Adaptive neural' network-based satellite attitude control in the
presence of CMG uncertainty
SO AEROSPACE SCIENCE AND TECHNOLOGY
LA English
DT Article
ID MANIPULATORS; VELOCITY; VEHICLE; INERTIA
AB An attitude tracking controller is developed for control moment gyroscope (CMG)-actuated satellites, which is shown to achieve accurate attitude tracking in the presence of unmodeled external disturbance torques, parametric uncertainty, and nonlinear CMG disturbances. Since the disturbances/uncertainties do not all satisfy the typical linear-in-the-parameters (LP) assumption, a neural network (NN) is included in the control development. The innovation of the result is the development of a Lyapunov-based design/analysis that indicates exponential convergence to an arbitrarily small domain. The result is obtained despite the characteristics of the uncertainty; the nonvanishing disturbance terms; and the fact that the control input is premultiplied by a non-square, time-varying, nonlinear, uncertain matrix. In addition to the Lyapunov-based analysis, experimental results demonstrate the performance of the developed controller. (C) 2016 Elsevier Masson SAS. All rights reserved.
C1 [MacKunis, W.] Embry Riddle Aeronaut Univ, Dept Phys Sci, Daytona Beach, FL 32114 USA.
[Leve, F.] Kirtland Air Force Base, Air Force Res Lab, Albuquerque, NM 87117 USA.
[Patre, P. M.] TE Connect, Adv Mfg Technol Sect, Harrisburg, PA 17111 USA.
[Fitz-Coy, N.; Dixon, W. E.] Univ Florida, Dept Mech & Aerosp Engn, Gainesville, FL 32611 USA.
RP MacKunis, W (reprint author), Embry Riddle Aeronaut Univ, Dept Phys Sci, Daytona Beach, FL 32114 USA.
EM william.mackunis@erau.edu; frederick.leve@us.af.mil;
parag.patre@gmail.com; nfc@ufl.edu; wdixon@ufl.edu
RI Dixon, Warren/F-5238-2015
OI Dixon, Warren/0000-0002-5091-181X
NR 27
TC 0
Z9 0
U1 2
U2 3
PU ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
PI PARIS
PA 23 RUE LINOIS, 75724 PARIS, FRANCE
SN 1270-9638
EI 1626-3219
J9 AEROSP SCI TECHNOL
JI Aerosp. Sci. Technol.
PD JUL
PY 2016
VL 54
BP 218
EP 228
DI 10.1016/j.ast.2016.04.022
PG 11
WC Engineering, Aerospace
SC Engineering
GA DP4BS
UT WOS:000378441000021
ER
PT J
AU Ghoreyshi, M
Bergeron, K
Jirasek, A
Seidel, J
Lofthouse, AJ
Cummings, RM
AF Ghoreyshi, Mehdi
Bergeron, Keith
Jirasek, Adam
Seidel, Juergen
Lofthouse, Andrew J.
Cummings, Russell M.
TI Computational aerodynamic modeling for flight dynamics simulation of
ram-air parachutes
SO AEROSPACE SCIENCE AND TECHNOLOGY
LA English
DT Article
DE Ram-air parachutes; Linear regression method; Dynamic derivatives
AB This work presents a step toward bridging the gap between flight dynamics simulation of ram-air parachutes and high-fidelity computational fluid dynamics. Today's parachute design codes mainly rely on the empirical or semi-empirical methods generated from wind tunnel experiments and drop tests. The outcome of this study will hopefully help to reduce the cost of experiments and drop testing in the design of future canopies and to better understand the aerodynamic characteristics of these geometries. In this work, the parachute geometries were modeled as rigid rectangular wings with an aspect ratio of two and zero anhedral angle. The wings have seven opening cells and the trailing edge is deflected or not deflected. To validate computational methods, the aerodynamic predictions of similar wings, but with closed and round inlets, are compared with experimental data available from the Subsonic Wind Tunnel at United States Air Force Academy. Total lift and drag force coefficients were measured at a Reynolds number of 1.4 million. The results show that computational predictions of fine (closed-inlet) grids match the experimental data very well up to the stall angle. Both experiments and simulations show that closed wings have sharp stalling characteristics. The aerodynamics of closed wings up to stall can be approximated by linear functions and their derivatives. The closed wings show a negative static stability with respect to changes in the angle of attack. The open wings, on other hand, have positive static stability in the longitudinal and lateral directions. The open wings exhibit highly nonlinear unsteady aerodynamic characteristics; they also stall earlier and have higher drag values than the closed wings. The aerodynamic derivatives of open and closed wings were estimated using a linear regression method and training data simulated in small-amplitude oscillations in pitch, yaw, and roll directions. While the open wings have large oscillations in aerodynamic coefficients over the yawing and rolling hysteresis loops, lateral aerodynamic derivatives of the open and closed wings are similar. Finally, the results show that model predictions are reasonably accurate for use in flight-dynamics simulations. Published by Elsevier Masson SAS.
C1 [Ghoreyshi, Mehdi; Jirasek, Adam; Seidel, Juergen; Lofthouse, Andrew J.; Cummings, Russell M.] US Air Force Acad, High Performance Comp Res Ctr, Colorado Springs, CO 80840 USA.
[Bergeron, Keith] US Army Natick Res, Ctr Dev & Engn, Natick, MA 01760 USA.
RP Ghoreyshi, M (reprint author), US Air Force Acad, High Performance Comp Res Ctr, Colorado Springs, CO 80840 USA.
EM mehdi.ghoreyshi@usafa.edu
FU USAFA; NSRDEC Airdrop Technology Team; High Performance Computing
Research Center at USAFA; US Air Force Academy [FA7000-13-2-0009,
FA7000-13-2-0018]
FX Mehdi Ghoreyshi and Jurgen Seidel are supported by USAFA; their
financial support is gratefully acknowledged. Acknowledgments are
expressed to the Department of Defense High Performance Computing
Modernization Program (HPCMP) and the AFRL DSRC for providing computer
time. The authors appreciate the support provided by the NSRDEC Airdrop
Technology Team and the High Performance Computing Research Center at
USAFA.; This material is based in part on research sponsored by the US
Air Force Academy under agreement numbers FA7000-13-2-0009 and
FA7000-13-2-0018. The U.S. Government is authorized to reproduce and
distribute reprints for Governmental purposes notwithstanding any
copyright notation thereon. The views and conclusions contained herein
are those of the authors and should not be interpreted as necessarily
representing the official policies or endorsements, either expressed or
implied, of the US Air Force Academy or the U.S. Government.
NR 38
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U1 5
U2 6
PU ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
PI PARIS
PA 23 RUE LINOIS, 75724 PARIS, FRANCE
SN 1270-9638
EI 1626-3219
J9 AEROSP SCI TECHNOL
JI Aerosp. Sci. Technol.
PD JUL
PY 2016
VL 54
BP 286
EP 301
DI 10.1016/j.ast.2016.04.024
PG 16
WC Engineering, Aerospace
SC Engineering
GA DP4BS
UT WOS:000378441000027
ER
PT J
AU Rosenberger, MR
Jones, JP
Heller, ER
Graham, S
King, WP
AF Rosenberger, Matthew R.
Jones, Jason P.
Heller, Eric R.
Graham, Samuel
King, William P.
TI Nanometer-Scale Strain Measurements in AlGaN/GaN High-Electron Mobility
Transistors During Pulsed Operation
SO IEEE TRANSACTIONS ON ELECTRON DEVICES
LA English
DT Article
DE Atomic force microscopy; gallium nitride (GaN); high-electron mobility
transistors (HEMTs); semiconductor device reliability; strain
measurement
ID DEGRADATION EVOLUTION; HEMTS; TEMPERATURE; STRESS; DEPENDENCE;
RESISTANCE; DEVICES
AB Electric, thermal, and mechanical strain fields drive the degradation of AlGaN/GaN high-electron mobility transistors (HEMTs). The resulting mechanical strains within the devices are particularly important. However, a lack of high-resolution measurements of device deformation has limited progress in understanding the related phenomena. This paper presents the atomic force microscope measurements of thermomechanical deformation of AlGaN/GaN HEMT devices during pulsed operation. We investigate the devices with various operating conditions: drain-source voltage, V-DS, of 0-50 V; drain-source power of 0-6 W/mm; and operating frequency of 55-400 kHz. As V-DS increases, thermomechanical deformation decreases, especially in the region above the gate. An electrothermomechanical model closely matches with and helps to explain the measurements. According to the model, the maximum periodic tensile thermal stress, which occurs at the drain-side edge of the gate footprint, is 55% larger for V-DS = 10 V than for V-DS = 48 V for the same device power. The maximum tensile thermal stress in the device depends on the gate temperature and not the maximum device temperature. As V-DS increases, the hotspot moves away from the gate, leading to lower gate temperature rise and lower tensile thermal stress.
C1 [Rosenberger, Matthew R.; King, William P.] Univ Illinois, Dept Mech Sci & Engn, Urbana, IL 61801 USA.
[Jones, Jason P.; Graham, Samuel] Georgia Inst Technol, George W Woodruff Sch Mech Engn, Atlanta, GA 30332 USA.
[Heller, Eric R.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Rosenberger, MR (reprint author), Univ Illinois, Dept Mech Sci & Engn, Urbana, IL 61801 USA.
EM mrosenb5@illinois.edu; jpjones89@gatech.edu; eric.heller@wpafb.af.mil;
sgraham@gatech.edu; wpk@illinois.edu
FU National Science Foundation Engineering Research Center for Power
Optimization of Electro Thermal Systems [EEC-1449548]; Department of
Energy Office of Science Graduate Fellowship Program; American Recovery
and Reinvestment Act within Oak Ridge Institute for Science and
Education-Oak Ridge Associated Universities [DE-AC05-06OR23100]; Air
Force Office of Scientific Research [FA9550-12-1-0089]
FX This work was supported in part by the National Science Foundation
Engineering Research Center for Power Optimization of Electro Thermal
Systems under Grant EEC-1449548, in part by the Department of Energy
Office of Science Graduate Fellowship Program, made possible in part by
the American Recovery and Reinvestment Act of 2009, within the Oak Ridge
Institute for Science and Education-Oak Ridge Associated Universities
under Contract DE-AC05-06OR23100, and in part by the Air Force Office of
Scientific Research under Grant FA9550-12-1-0089. The review of this
paper was arranged by Editor P. J. Fay.
NR 21
TC 0
Z9 0
U1 7
U2 19
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9383
EI 1557-9646
J9 IEEE T ELECTRON DEV
JI IEEE Trans. Electron Devices
PD JUL
PY 2016
VL 63
IS 7
BP 2742
EP 2748
DI 10.1109/TED.2016.2566926
PG 7
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA DP6KX
UT WOS:000378607100016
ER
PT J
AU MacKenzie, EJ
Bosse, MJ
Pollak, AN
Tornetta, P
Carlisle, H
Silva, H
Bosse, MJ
Hsu, JR
Karunakar, MA
Sims, SH
Seymour, RB
Churchill, C
Hak, DJ
Henderson, C
Gissel, H
Schmidt, A
Lafferty, PM
Westberg, JR
McKinley, T
Gaski, G
Nelson, A
Reid, JS
Boateng, HA
Warlow, PM
Vallier, HA
Patterson, BM
Boyd, AJ
Smith, C
Toledano, JE
Toledano, JE
Kuhn, KM
Langensiepen, SB
Mazurek, MT
Langford, J
Harriott, P
Hayda, RA
Zych, GA
Hutson, JJ
Rodriguez, D
Stinner, D
Osborn, PM
Mann, DW
Jones, CB
Sietsema, DL
Endres, TJ
Cannada, LK
Watson, JT
Sanders, R
Sagi, HC
Chan, DS
Steverson, B
Miclau, T
Morshed, S
Belaye, T
Marsh, JL
Karam, MD
Westerlind, BO
Pollak, AN
O'Toole, R
Manson, TT
Sciadini, MF
Nascone, JW
Russell, G
Bergin, PF
Smith, L
Teague, DC
Carl, K
Wells, J
Evans, AR
Farrell, DJ
Maroto, MR
Gary, J
Burgess, AR
Franco, K
Firoozabadi, R
Sangeorzan, B
Obremskey, WT
Mir, HR
Archer, KR
Molina, CS
Carroll, E
Teasdall, RD
Holden, MB
Goodman, JB
Gordon, W
Keeling, J
Ceniceros, X
Wenke, JC
Ficke, JR
Keeney, JA
Unger, DV
MacKenzie, EJ
Castillo, RC
Scharfstein, DO
Reider, L
Frey, K
Carlini, A
De Lissovoy, G
Holthaus, R
Zadnik-Newell, M
Allen, LE
AF MacKenzie, Ellen J.
Bosse, Michael J.
Pollak, Andrew N.
Tornetta, Paul, III
Carlisle, Hope
Silva, Heather
Bosse, Michael J.
Hsu, Joseph R.
Karunakar, Madhav A.
Sims, Stephen H.
Seymour, Rachel B.
Churchill, Christine
Hak, David J.
Henderson, Corey
Gissel, Hannah
Schmidt, Andrew
Lafferty, Paul M.
Westberg, Jerald R.
McKinley, Todd
Gaski, Greg
Nelson, Amy
Reid, J. Spence
Boateng, Henry A.
Warlow, Pamela M.
Vallier, Heather A.
Patterson, Brendan M.
Boyd, Alysse J.
Smith, Christopher
Toledano, James E.
Toledano, James E.
Kuhn, Kevin M.
Langensiepen, Sarah B.
Mazurek, Michael T.
Langford, Joshua
Harriott, Paula
Hayda, Roman A.
Zych, Gregory A.
Hutson, James J., Jr.
Rodriguez, Dinorah
Stinner, Daniel
Osborn, Patrick M.
Mann, Dennis W.
Jones, Clifford B.
Sietsema, Debra L.
Endres, Terrence J.
Cannada, Lisa K.
Watson, J. Tracy
Sanders, Roy
Sagi, H. Claude
Chan, Daniel S.
Steverson, Barbara
Miclau, Theodore
Morshed, Saam
Belaye, Tigist
Marsh, J. Lawrence
Karam, Matthew D.
Westerlind, Brian O.
Pollak, Andrew N.
O'Toole, Robert
Manson, Theodore T.
Sciadini, Marcus F.
Nascone, Jason W.
Russell, George
Bergin, Patrick F.
Smith, Lori
Teague, David C.
Carl, Kathy
Wells, Janet
Evans, Andrew R.
Farrell, Dana J.
Maroto, Medardo R.
Gary, Joshua
Burgess, Andrew R.
Franco, Kathy
Firoozabadi, Reza
Sangeorzan, Bruce
Obremskey, William T.
Mir, Hassan R.
Archer, Kristin R.
Molina, Cesar S.
Carroll, Eben
Teasdall, Robert D.
Holden, Martha B.
Goodman, J. Brett
Gordon, Wade
Keeling, John
Ceniceros, Xochitl
Wenke, Joseph C.
Ficke, James R.
Keeney, James A.
Unger, Daniel V.
MacKenzie, Ellen J.
Castillo, Renan C.
Scharfstein, Daniel O.
Reider, Lisa
Frey, Katherine
Carlini, Anthony
De Lissovoy, Gregory
Holthaus, Rachel
Zadnik-Newell, Mary
Allen, Lauren E.
CA METRC
TI Building a Clinical Research Network in Trauma Orthopaedics: The Major
Extremity Trauma Research Consortium (METRC)
SO JOURNAL OF ORTHOPAEDIC TRAUMA
LA English
DT Article
DE clinical research networks; multicenter trials; METRC; orthopaedic
trauma outcomes research
ID OPEN FRACTURES; CLASSIFICATION; MULTICENTER; CHALLENGES; TRIALS; WAR;
MANAGEMENT; OUTCOMES; BOARD; CARE
AB Objectives: Lessons learned from battle have been fundamental to advancing the care of injuries that occur in civilian life. Equally important is the need to further refine these advances in civilian practice, so they are available during future conflicts. The Major Extremity Trauma Research Consortium (METRC) was established to address these needs.
Methods: METRC is a network of 22 core level I civilian trauma centers and 4 core military treatment centers-with the ability to expand patient recruitment to more than 30 additional satellite trauma centers for the purpose of conducting multicenter research studies relevant to the treatment and outcomes of orthopaedic trauma sustained in the military. Early measures of success of the Consortium pertain to building of an infrastructure to support the network, managing the regulatory process, and enrolling and following patients in multiple studies.
Results: METRC has been successful in maintaining the engagement of several leading, high volume, level I trauma centers that form the core of METRC; together they operatively manage 15,432 major fractures annually. METRC is currently funded to conduct 18 prospective studies that address 6 priority areas. The design and implementation of these studies are managed through a single coordinating center. As of December 1, 2015, a total of 4560 participants have been enrolled.
Conclusions: Success of METRC to date confirms the potential for civilian and military trauma centers to collaborate on critical research issues and leverage the strength that comes from engaging patients and providers from across multiple centers.
C1 [MacKenzie, Ellen J.; Pollak, Andrew N.; MacKenzie, Ellen J.] Boston Med Ctr, Boston, MA USA.
[Tornetta, Paul, III; Carlisle, Hope; Silva, Heather] Carolinas Med Ctr, Charlotte, NC 28203 USA.
[Hsu, Joseph R.; Karunakar, Madhav A.; Sims, Stephen H.; Seymour, Rachel B.; Churchill, Christine] Denver Hlth & Hosp Author, Denver, CO USA.
[Hak, David J.; Henderson, Corey; Gissel, Hannah] Hennepin Cty Med Ctr, Minneapolis, MN 55415 USA.
[Hak, David J.; Henderson, Corey; Gissel, Hannah] Reg Hosp, Minneapolis, MN USA.
[Schmidt, Andrew; Lafferty, Paul M.; Westberg, Jerald R.] Indiana Univ, Hlth Methodist Hosp, Indianapolis, IN 46204 USA.
[Schmidt, Andrew; Lafferty, Paul M.; Westberg, Jerald R.] St Vincent Indianapolis Hosp, Indianapolis, IN USA.
[McKinley, Todd; Gaski, Greg; Nelson, Amy] Hershey Med Ctr, Hershey, PA USA.
[Reid, J. Spence; Boateng, Henry A.; Warlow, Pamela M.] Metrohlth Med Ctr, Cleveland, OH USA.
[Vallier, Heather A.; Patterson, Brendan M.; Boyd, Alysse J.] Naval Med Ctr Portsmouth, Portsmouth, VA USA.
[Smith, Christopher] Naval Med Ctr San Diego, San Diego, CA USA.
[Toledano, James E.; Kuhn, Kevin M.; Langensiepen, Sarah B.; Mazurek, Michael T.] Orlando Reg Med Ctr Inc, Orlando, FL USA.
[Langford, Joshua; Harriott, Paula] Brown Univ, Rhode Isl Hosp, Providence, RI 02903 USA.
[Hayda, Roman A.] Ryder Trauma Ctr, Miami, FL USA.
[Zych, Gregory A.; Hutson, James J., Jr.; Rodriguez, Dinorah] San Antonio Mil Med Ctr, Ft Sam Houston, TX USA.
Spectrum Hlth Butterworth Hosp, Grand Rapids, MI USA.
[Jones, Clifford B.; Sietsema, Debra L.; Endres, Terrence J.] St Louis Univ Hosp, St Louis, MO USA.
[Watson, J. Tracy] Tampa Gen Hosp, Tampa, FL 33606 USA.
[Watson, J. Tracy] St Josephs Hosp, Tampa, FL USA.
[Sanders, Roy; Sagi, H. Claude; Chan, Daniel S.; Steverson, Barbara] Univ Calif San Francisco, San Francisco Gen Hosp, Orthopaed Trauma Inst, San Francisco, CA USA.
[Miclau, Theodore; Morshed, Saam; Belaye, Tigist] Univ Iowa Hosp & Clin, Iowa City, IA 52242 USA.
[Marsh, J. Lawrence; Karam, Matthew D.; Westerlind, Brian O.] Univ Maryland, R Adams Cowley Shock Trauma Ctr, Baltimore, MD 21201 USA.
[O'Toole, Robert; Manson, Theodore T.; Sciadini, Marcus F.; Nascone, Jason W.] Univ Mississippi, Med Ctr, Jackson, MS 39216 USA.
[Russell, George; Bergin, Patrick F.; Smith, Lori] Univ Oklahoma, Med Ctr, Oklahoma City, OK USA.
[Teague, David C.; Carl, Kathy; Wells, Janet] Univ Pittsburgh, Pittsburgh, PA USA.
[Farrell, Dana J.] Univ Texas SW Med Ctr Dallas, Dallas, TX 75390 USA.
[Maroto, Medardo R.] Univ Texas Hlth Sci Ctr Houston, Houston, TX 77030 USA.
[Gary, Joshua; Burgess, Andrew R.; Franco, Kathy] Univ Washington, Harborview Med Ctr, 325 9Th Ave, Seattle, WA 98104 USA.
[Firoozabadi, Reza; Sangeorzan, Bruce] Vanderbilt Univ, Med Ctr, Nashville, TN USA.
[Obremskey, William T.; Mir, Hassan R.; Archer, Kristin R.; Molina, Cesar S.] Wake Forest Univ, Baptist Med Ctr, Winston Salem, NC 27109 USA.
[Carroll, Eben; Teasdall, Robert D.; Holden, Martha B.; Goodman, J. Brett] Walter Reed Natl Mil Med Ctr, Bethesda, MD USA.
[Wenke, Joseph C.] METRC, Lakeland, FL USA.
[Keeney, James A.] US Air Force, Washington, DC 20330 USA.
[Unger, Daniel V.] US Navy, Washington, DC USA.
[Unger, Daniel V.] Johns Hopkins Bloomberg Sch Publ Hlth, METRC Coordinating Ctr, Baltimore, MD USA.
RP MacKenzie, EJ (reprint author), Boston Med Ctr, Boston, MA USA.
EM emackenz@jhsph.edu
FU Department of Defense [W8XWH-09-2-0108, W8XWH-10-2-0090]
FX METRC is funded by the Department of Defense through 2 awards from the
Peer Reviewed Orthopaedic Research Program (PRORP) of the
Congressionally Directed Medical Research Programs
(CDMRP)-W8XWH-09-2-0108 and W8XWH-10-2-0090.
NR 26
TC 0
Z9 0
U1 0
U2 2
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA TWO COMMERCE SQ, 2001 MARKET ST, PHILADELPHIA, PA 19103 USA
SN 0890-5339
EI 1531-2291
J9 J ORTHOP TRAUMA
JI J. Orthop. Trauma
PD JUL
PY 2016
VL 30
IS 7
BP 353
EP 361
DI 10.1097/BOT.0000000000000549
PG 9
WC Orthopedics; Sport Sciences
SC Orthopedics; Sport Sciences
GA DO9GM
UT WOS:000378093200002
ER
PT J
AU Li, XN
Zhu, Z
Yin, XF
Wang, FF
Gu, W
Fu, ZP
Lu, YL
AF Li, Xiaoning
Zhu, Zhu
Yin, Xiaofeng
Wang, Fangfang
Gu, Wen
Fu, Zhengping
Lu, Yalin
TI Enhanced magnetism and light absorption of Eu-doped BiFeO3
SO JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
LA English
DT Article
ID PHOTOCATALYTIC ACTIVITY; NANOPARTICLES; THERAPY; PHOSPHOR; DESIGN; DIODE
AB Eu-doped BiFeO3 (BEFO) prepared by a conventional hydrothermal method was with weak magnetism, a good visible light absorption and a weak luminescent broadening peak at 530-590 nm under the UV excitation of 365 nm. When treated by solvothermal method using ammonia as solvent, the remnant magnetization of the sample was increased from 36 to 114 memu/g. Instead, when using ethanol as solvent, the absorbance value was enhanced to be 1.2 at the wavelength range even to 800 nm. However, the results of photoluminescence measurement of post-treated samples suggested that the enhanced light absorption and magnetism will inevitably suppress the photoluminescence. The present work provided a facile way to improve the magnetism and light absorption while maintaining structure and morphology of bismuth ferrite and brought light to the study of interrelationships between the light absorption, magnetism and photoluminescence.
C1 [Li, Xiaoning; Zhu, Zhu; Yin, Xiaofeng; Wang, Fangfang; Gu, Wen; Fu, Zhengping; Lu, Yalin] Univ Sci & Technol China, Dept Mat Sci & Engn, CAS Key Lab Mat Energy Convers, Hefei 230026, Peoples R China.
[Fu, Zhengping; Lu, Yalin] Univ Sci & Technol China, Synerget Innovat Ctr Quantum Informat & Quantum P, Hefei 230026, Peoples R China.
[Fu, Zhengping; Lu, Yalin] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China.
[Lu, Yalin] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230026, Peoples R China.
[Lu, Yalin] US Air Force Acad, Laser Opt Res Ctr, Colorado Springs, CO 80840 USA.
RP Fu, ZP; Lu, YL (reprint author), Univ Sci & Technol China, Dept Mat Sci & Engn, CAS Key Lab Mat Energy Convers, Hefei 230026, Peoples R China.; Fu, ZP; Lu, YL (reprint author), Univ Sci & Technol China, Synerget Innovat Ctr Quantum Informat & Quantum P, Hefei 230026, Peoples R China.; Fu, ZP; Lu, YL (reprint author), Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China.; Lu, YL (reprint author), Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230026, Peoples R China.; Lu, YL (reprint author), US Air Force Acad, Laser Opt Res Ctr, Colorado Springs, CO 80840 USA.
EM fuzp@ustc.edu.cn; yllu@ustc.edu.cn
FU National Basic Research Program of China [2012CB922000]; Key Research
Program of Chinese Academy of Sciences [KGZD-EW-T06]; Provincial Natural
Science Research Project of Anhui Colleges [KJ2014ZD40]; External
Cooperation Program of BIC, Chinese Academy of Sciences
[211134KYSB20130017]
FX This work was financially supported by the National Basic Research
Program of China (2012CB922000), Key Research Program of Chinese Academy
of Sciences (KGZD-EW-T06), the Provincial Natural Science Research
Project of Anhui Colleges (KJ2014ZD40) and External Cooperation Program
of BIC, Chinese Academy of Sciences (211134KYSB20130017).
NR 27
TC 0
Z9 0
U1 16
U2 26
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0957-4522
EI 1573-482X
J9 J MATER SCI-MATER EL
JI J. Mater. Sci.-Mater. Electron.
PD JUL
PY 2016
VL 27
IS 7
BP 7079
EP 7083
DI 10.1007/s10854-016-4666-3
PG 5
WC Engineering, Electrical & Electronic; Materials Science,
Multidisciplinary; Physics, Applied; Physics, Condensed Matter
SC Engineering; Materials Science; Physics
GA DO6MA
UT WOS:000377896400060
ER
PT J
AU Bush, R
Kiyota, M
Kiyota, C
AF Bush, Ralph
Kiyota, Michelle
Kiyota, Catherine
TI Characterization of a Friction Stir Weld in Aluminum Alloy 7055 Using
Microhardness, Electrical Conductivity, and Differential Scanning
Calorimetry (DSC)
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article
ID MG-CU ALLOYS; HEAT-TREATMENTS; MICROSTRUCTURE; PRECIPITATION; EVOLUTION;
STRENGTH; KINETICS; BEHAVIOR; HARDNESS; DISSOLUTION
AB Optical microscopy, microhardness, electrical conductivity, and differential scanning calorimetry (DSC) were used to characterize the microstructure, hardness, and precipitate structure as a function of position in a friction stir weld, naturally aged for 10 years, in aluminum alloy 7055. Results are shown for the as-welded/naturally aged condition and for a weld that was post-aged using a -T76 regimen. The grain structure and microhardness results reveal the expected central recrystallized region, a thermo-mechanical affected zone (TMAZ), and heat-affected zone (HAZ) with typical changes in microhardness. DSC scans for the as-welded/naturally aged condition indicate a precipitate structure similar to that of a naturally aged condition in the central recrystallized region. Maximum precipitate coarsening and overaging occurs near the TMAZ/HAZ boundary with reduced precipitate dissolution and coarsening as the distance from the weld increases. The post-weld aging resulted in the transformation of GP zones to more stable precipitates plus coarsening of the more stable eta' and eta precipitates. A combination of DSC testing and CALPHAD calculations allowed calculation of precipitate volume fraction in the HAZ. The precipitate volume fraction decreased monotonically from 0.052 in the baseline material to 0.044 at the TMAZ/HAZ interface.
C1 [Bush, Ralph] US Air Force Acad, Dept Engn Mech, Colorado Springs, CO 80840 USA.
[Kiyota, Michelle; Kiyota, Catherine] US Air Force Acad, Dept Chem, Colorado Springs, CO 80840 USA.
RP Bush, R (reprint author), US Air Force Acad, Dept Engn Mech, Colorado Springs, CO 80840 USA.
EM ralph.bush@usafa.edu
NR 46
TC 0
Z9 0
U1 8
U2 13
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1073-5623
EI 1543-1940
J9 METALL MATER TRANS A
JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
PD JUL
PY 2016
VL 47A
IS 7
BP 3522
EP 3532
DI 10.1007/s11661-016-3506-7
PG 11
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA DN9XT
UT WOS:000377434700030
ER
PT J
AU Rutledge, JL
Polanka, MD
Bogard, DG
AF Rutledge, James L.
Polanka, Marc D.
Bogard, David G.
TI The Delta Phi Method of Evaluating Overall Film Cooling Performance
SO JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME
LA English
DT Article
ID HEAT-TRANSFER
AB Film cooling designs are often evaluated experimentally and characterized in terms of their spatial distributions of adiabatic effectiveness, eta, which is the nondimensionalized form of the adiabatic wall temperature, T-aw. Additionally, film cooling may alter the convective heat transfer coefficient with the possibility of an increase in h that offsets the benefits of reduced T-aw. It is therefore necessary to combine these two effects to give some measure of the benefit of film cooling. The most frequently used method is the net heat flux reduction (NHFR), which gives the fractional reduction in heat flux that accompanies film cooling for the hypothetical case of constant wall temperature. NHFR is imperfect in part due to the fact that this assumption does not account for the primary purpose of film cooling-to reduce the metal temperature to an acceptable level. In the present work, we present an alternative method of evaluating film cooling performance that yields the reduction in metal temperature, or in the nondimensional sense, an increase in phi that would be predicted with film cooling. This Delta phi approach is then applied using experimentally obtained eta and h/h(0) values on a simulated turbine blade leading edge region. The delta-phi approach agrees well with the legacy NHFR technique in terms of the binary question of whether the film cooling is beneficial or detrimental, but provides greater insight into the temperature reduction that a film cooling design would provide an actual turbine component. For example, instead of giving an area-averaged NHFR = 0.67 (indicating a 67% reduction in heat flux through film cooling) on the leading edge region with M = 0.5, the Delta phi approach indicates an increase in phi of 0.061 (or a 61 K surface temperature decrease with a notional value of T-infinity - T-c = 1000 K). Alternatively, the technique may be applied to predict the maximum allowable increase in T-infinity against which a film cooling scheme could protect.
C1 [Rutledge, James L.; Polanka, Marc D.] US Air Force, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
[Bogard, David G.] Univ Texas Austin, Dept Mech Engn, Austin, TX 78712 USA.
RP Rutledge, JL (reprint author), US Air Force, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
EM james.rutledge@us.af.mil
NR 13
TC 0
Z9 0
U1 10
U2 11
PU ASME
PI NEW YORK
PA TWO PARK AVE, NEW YORK, NY 10016-5990 USA
SN 0889-504X
EI 1528-8900
J9 J TURBOMACH
JI J. Turbomach.-Trans. ASME
PD JUL
PY 2016
VL 138
IS 7
AR 071006
DI 10.1115/1.4032456
PG 8
WC Engineering, Mechanical
SC Engineering
GA DN5WA
UT WOS:000377141000006
ER
PT J
AU Rutledge, JL
Rathsack, TC
Van Voorhis, MT
Polanka, MD
AF Rutledge, James L.
Rathsack, Tylor C.
Van Voorhis, Matthew T.
Polanka, Marc D.
TI Film Cooling Parameter Waveforms on a Turbine Blade Leading Edge Model
With Oscillating Stagnation Line
SO JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME
LA English
DT Article
ID HEAT-TRANSFER; DENSITY RATIO; HOLES; WAKE; DOWNSTREAM
AB It is necessary to understand how film cooling influences the external convective boundary condition involving both the adiabatic wall temperature and the heat transfer coefficient in order to predict the thermal durability of a gas turbine hot gas path component. Most studies in the past have considered only steady flow, but studies of the unsteadiness naturally present in turbine flow have become more prevalent. One source of unsteadiness is wake passage from upstream components which can cause fluctuations in the stagnation location on turbine airfoils. This in turn causes unsteadiness in the behavior of the leading edge coolant jets and thus fluctuations in both the adiabatic effectiveness and heat transfer coefficient. The dynamics of h and eta are now quantifiable with modern inverse heat transfer methods and nonintrusive infrared thermography. The present study involved the application of a novel inverse heat transfer methodology to determine time-resolved adiabatic effectiveness and heat transfer coefficient waveforms on a simulated turbine blade leading edge with an oscillating stagnation position. The leading edge geometry was simulated with a circular cylinder with a coolant hole located 21.5 deg downstream from the leading edge stagnation line, angled 20 deg to the surface and 90 deg to the streamwise direction. The coolant plume is shown to shift in response to the stagnation line movement. These oscillations thus influence the film cooling coverage, and the time-averaged benefit of film cooling is influenced by the oscillation.
C1 [Rutledge, James L.; Rathsack, Tylor C.; Van Voorhis, Matthew T.; Polanka, Marc D.] US Air Force, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
[Van Voorhis, Matthew T.] Purdue Univ, W Lafayette, IN 47907 USA.
RP Rutledge, JL (reprint author), US Air Force, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
EM james.rutledge@us.af.mil
FU Air Force Research Laboratory
FX The authors extend their thanks to the Air Force Research Laboratory for
their support of this project. The authors also thank Dr. David Bogard
for his advice concerning execution of the oscillating stagnation line
experiments.
NR 24
TC 0
Z9 0
U1 12
U2 12
PU ASME
PI NEW YORK
PA TWO PARK AVE, NEW YORK, NY 10016-5990 USA
SN 0889-504X
EI 1528-8900
J9 J TURBOMACH
JI J. Turbomach.-Trans. ASME
PD JUL
PY 2016
VL 138
IS 7
AR 071005
DI 10.1115/1.4032455
PG 12
WC Engineering, Mechanical
SC Engineering
GA DN5WA
UT WOS:000377141000005
ER
PT J
AU Font, GI
AF Font, Gabriel I.
TI Computational acceleration of orbital neutral sensor ionizer simulation
through phenomena separation
SO JOURNAL OF COMPUTATIONAL PHYSICS
LA English
DT Article
DE Computation; DSMC; PIC; Acceleration; Ionosphere; Orbital sensor
ID THRUSTER FIRINGS; SATELLITE; ENVIRONMENT; SHUTTLE; PLASMA
AB Simulation of orbital phenomena is often difficult because of the non-continuum nature of the flow, which forces the use of particle methods, and the disparate time scales, which make long run times necessary. In this work, the computational work load has been reduced by taking advantage of the low number of collisions between different species. This allows each population of particles to be brought into convergence separately using a time step size optimized for its particular motion. The converged populations are then brought together to simulate low probability phenomena, such as ionization or excitation, on much longer time scales. The result of this technique has the effect of reducing run times by a factor of 10(3)-10(4). The technique was applied to the simulation of a low earth orbit neutral species sensor with an ionizing element. Comparison with laboratory experiments of ion impacts generated by electron flux shows very good agreement. (C) 2016 Published by Elsevier Inc.
C1 [Font, Gabriel I.] US Air Force Acad, Dept Phys, Colorado Springs, CO 80840 USA.
RP Font, GI (reprint author), US Air Force Acad, Dept Phys, Colorado Springs, CO 80840 USA.
EM gabriel.font@usafa.edu
NR 14
TC 0
Z9 0
U1 2
U2 3
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0021-9991
EI 1090-2716
J9 J COMPUT PHYS
JI J. Comput. Phys.
PD JUL 1
PY 2016
VL 316
BP 1
EP 9
DI 10.1016/j.jcp.2016.02.060
PG 9
WC Computer Science, Interdisciplinary Applications; Physics, Mathematical
SC Computer Science; Physics
GA DL7DE
UT WOS:000375799200001
ER
PT J
AU Hong, GY
Pachter, R
AF Hong, Gongyi
Pachter, Ruth
TI Bound Flavin-Cytochrome Model of Extracellular Electron Transfer in
Shewanella oneidensis: Analysis by Free Energy Molecular Dynamics
Simulations
SO JOURNAL OF PHYSICAL CHEMISTRY B
LA English
DT Article
ID BINDING FREE-ENERGIES; FORCE-FIELD; OXIDE REDUCTION; MR-1; TRANSPORT;
CHARGE; EFFICIENT; NANOWIRES; POTENTIALS; MEMBRANE
AB Flavins are known to enhance extracellular electron transfer (BET) in Shewanella oneidensis MR-1 bacteria, which reduce electron acceptors through outer-membrane (OM) cytochromes c. Free-shuttle and bound-redox cofactor mechanisms were proposed to explain this enhancement, but recent electro-chemical reports favor a flavin-bound model, proposing two one-electron reductions of flavin, namely, oxidized (Ox) to semiquinone (Sq) and semiquinone to hydroquinone (Hq), at anodic and cathodic conditions, respectively. In this work, to provide a mechanistic understanding of riboflavin (RF) binding at the multiheme OM cytochrome OmcA, we explored binding configurations at hemes 2, 5, 7, and 10. Subsequently, on the basis of molecular dynamics (MD) simulations, binding free energies and redox potential shifts upon RF binding for the Ox/Sq and Sq/Hq reductions were analyzed. Our results demonstrated an upshift in the Ox/Sq and a downshift in the Sq/Hq redox potentials, consistent with a bound RF OmcA model. Furthermore, binding free energy MD simulations indicated an RF binding preference at heme 7. MD simulations of the OmcA MtrC complex interfacing at hemes S revealed a small interprotein redox potential difference with an electron transfer rate of 10(7)-10(8)/s.
C1 [Hong, Gongyi; Pachter, Ruth] US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Pachter, R (reprint author), US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM ruth.pachter@us.af.mil
FU Air Force Office of Scientific Research
FX We gratefully acknowledge support from the Air Force Office of
Scientific Research and computational resources and helpful assistance
provided by the AFRL DSRC.
NR 57
TC 0
Z9 0
U1 13
U2 17
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1520-6106
J9 J PHYS CHEM B
JI J. Phys. Chem. B
PD JUN 30
PY 2016
VL 120
IS 25
BP 5617
EP 5624
DI 10.1021/acs.jpcb.6b03851
PG 8
WC Chemistry, Physical
SC Chemistry
GA DQ8JF
UT WOS:000379456200003
PM 27266856
ER
PT J
AU Barr, SA
Kedziora, GS
Ecker, AM
Moller, JC
Berry, RJ
Breitzman, TD
AF Barr, Stephen A.
Kedziora, Gary S.
Ecker, Allison M.
Moller, James C.
Berry, Rajiv J.
Breitzman, Tim D.
TI Bond breaking in epoxy systems: A combined QM/MM approach
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID MOLECULAR-DYNAMICS SIMULATIONS; DENSITY-FUNCTIONAL THEORY; PARALLEL
COMPUTERS; FRACTURE; GRADIENT; ENERGY; APPROXIMATION; STABILIZATION;
DELAMINATION; COMPOSITES
AB A novel method to combine quantum mechanics (QM) and molecular mechanics has been developed to accurately and efficiently account for covalent bond breaking in polymer systems under high strain without the use of predetermined break locations. Use of this method will provide a better fundamental understanding of the mechano-chemical origins of fracture in thermosets. Since classical force fields cannot accurately account for bond breaking, and QM is too demanding to simulate large systems, a hybrid approach is required. In the method presented here, strain is applied to the system using a classical force field, and all bond lengths are monitored. When a bond is stretched past a threshold value, a zone surrounding the bond is used in a QM energy minimization to determine which, if any, bonds break. The QM results are then used to reconstitute the system to continue the classical simulation at progressively larger strain until another QM calculation is triggered. In this way, a QM calculation is only computed when and where needed, allowing for efficient simulations. A robust QM method for energy minimization has been determined, as well as appropriate values for the QM zone size and the threshold bond length. Compute times do not differ dramatically from classical molecular mechanical simulations.
C1 [Barr, Stephen A.; Ecker, Allison M.; Berry, Rajiv J.; Breitzman, Tim D.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Kedziora, Gary S.] Engility Corp, Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Berry, Rajiv J.] Miami Univ, Oxford, OH 45056 USA.
RP Berry, RJ (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM Rajiv.Berry@us.af.mil
FU Low Density Materials program of the U.S. Air Force Office of Scientific
Research Task [14RX09COR]; DoD HPCMP; PETTT program
FX This work is supported by the Low Density Materials program of the U.S.
Air Force Office of Scientific Research Task No. 14RX09COR. The authors
would like to thank the DoD HPCMP for supercomputer time and support and
the PETTT program for support.
NR 46
TC 0
Z9 0
U1 5
U2 9
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-9606
EI 1089-7690
J9 J CHEM PHYS
JI J. Chem. Phys.
PD JUN 28
PY 2016
VL 144
IS 24
AR 244904
DI 10.1063/1.4954507
PG 10
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA DQ4HZ
UT WOS:000379166100053
PM 27369541
ER
PT J
AU Shamberger, PJ
Wohlwend, JL
Roy, AK
Voevodin, AA
AF Shamberger, Patrick J.
Wohlwend, Jennifer L.
Roy, Ajit K.
Voevodin, Andrey A.
TI Investigating Grain Boundary Structures and Energetics of Rutile with
Reactive Molecular Dynamics
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID ELECTRONEGATIVITY EQUALIZATION METHOD; FORCE-FIELD; 1ST-PRINCIPLES
CALCULATIONS; TIO2 110; ELECTRONIC-PROPERTIES; TIO2(110) SURFACE;
TITANIUM-DIOXIDE; ATOMIC-STRUCTURE; REAXFF; SIMULATION
AB Determining quantitative grain boundary (GB) energies as a function of microscopic orientation parameters is essential in order to understand the population of boundaries present in polycrystalline ceramics and films, and the physical properties that result from these boundaries. Here, we investigate the use of two reactive potentials, COMB3 and ReaxFF, to predict free surface and grain boundary structures and energies in the TiO2 rutile system, and compare these results against previously reported ab initio surface and interfacial energies. We demonstrate reactive MD potentials to be generally capable of reproducing key features anticipated for GB structures and energetics, including relative GB and surface energy, charge distributions and potential for different polar and nonpolar terminations, and energy cusps at low-energy interfaces (e.g., coherent twin boundaries, coherent site lattice boundaries). This work establishes the foundation for further use of reactive MD to simulate libraries of oxide GBs and dynamic processes occurring along those GBs.
C1 [Shamberger, Patrick J.] Texas A&M Univ, Dept Mat Sci & Engn, Dwight Look Coll Engn, College Stn, TX 77843 USA.
[Wohlwend, Jennifer L.; Roy, Ajit K.] US Air Force, Nanoelect Mat Branch, Mat & Mfg Directorate, Res Lab, Wright Patterson AFB, OH 45459 USA.
[Wohlwend, Jennifer L.] Universal Technol Corp, Dayton, OH 45459 USA.
[Voevodin, Andrey A.] Univ N Texas, Dept Mat Sci & Engn, Denton, TX 76203 USA.
RP Shamberger, PJ (reprint author), Texas A&M Univ, Dept Mat Sci & Engn, Dwight Look Coll Engn, College Stn, TX 77843 USA.
EM patrick.shamberger@tamu.edu
RI Shamberger, Patrick/C-4795-2014
OI Shamberger, Patrick/0000-0002-8737-6064
FU AFOSR [14RX13COR]
FX We would like to thank Prof. S.B. Sinnott, Prof. A. van Duin, and Dr. T.
Liang for informative discussions during the preparation of this
manuscript. We would like to thank AFOSR for support of this work
(14RX13COR) and the Texas A&M Supercomputing Facility
(http://sc.tamu.edu) for computational facilities used in this study.
NR 70
TC 0
Z9 0
U1 13
U2 19
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD JUN 23
PY 2016
VL 120
IS 24
BP 13049
EP 13062
DI 10.1021/acs.jpcc.6b02695
PG 14
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA DP7FE
UT WOS:000378663800014
ER
PT J
AU Ard, SG
Shuman, NS
Martinez, O
Brown, SA
Sawyer, JC
Viggiano, AA
AF Ard, Shaun G.
Shuman, Nicholas S.
Martinez, Oscar, Jr.
Brown, Steven A.
Sawyer, Jordan C.
Viggiano, Albert A.
TI Reactivity from excited state (FeO+)-Fe-4 + CO sampled through reaction
of ground state (FeCO+)-Fe-4 + N2O
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID PHOTOELECTRON PHOTOION COINCIDENCE; TEMPERATURE-DEPENDENT KINETICS;
GAS-PHASE; 2-STATE REACTIVITY; FEO+; IRON; FE+; ACTIVATION; CHEMISTRY;
HYDROGEN
AB The kinetics of the FeCO+ + N2O reaction have been studied at thermal energies (300-600 K) using a variable temperature selected ion flow tube apparatus. Rate constants and product branching fractions are reported. The reaction is modestly inefficient, proceeding with a rate constant of 6.2 x 10(-11) cm(3) s(-1) at 300 K, with a small negative temperature dependence, declining to 4.4 x 10(-11) cm(3) s(-1) at 600 K. Both Fe+ and FeO+ products are observed, with a constant branching ratio of approximately 40: 60 at all temperatures. Calculation of the stationary points along the reaction coordinate shows that only the ground state quartet surface is initially sampled resulting in N-2 elimination; a submerged barrier along this portion of the surface dictates the magnitude and temperature dependence of the total rate constant. The product branching fractions are determined by the behavior of the remaining (OFeCO+)-O-4 fragment, and this behavior is compared to that found in the reaction of FeO+ + CO, which initially forms (OFeCO+)-O-6. Thermodynamic and kinetic arguments are used to show that the spin-forbidden surface crossing in this region is efficient, proceeding with an average rate constant of greater than 10(12) s(-1). Published by AIP Publishing.
C1 [Ard, Shaun G.; Shuman, Nicholas S.; Martinez, Oscar, Jr.; Brown, Steven A.; Sawyer, Jordan C.; Viggiano, Albert A.] Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
RP Ard, SG (reprint author), Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
FU Air Force Office of Scientific Research [AFOSR-16RVCOR276]; National
Research Council Research Associateship Program; Institute for
Scientific Research of Boston College [FA9453-10-C-0206]; AFRL Space
Scholars program
FX We are extremely grateful for the numerous discussions with Jurgen Troe.
The work was supported by the Air Force Office of Scientific Research
(No. AFOSR-16RVCOR276). O.M.J. is supported by the National Research
Council Research Associateship Program. S.G.A. acknowledges the support
from the Institute for Scientific Research of Boston College under
Contract No. FA9453-10-C-0206. S.A.B. and J.C.S. were supported under
the AFRL Space Scholars program.
NR 28
TC 0
Z9 0
U1 7
U2 8
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-9606
EI 1089-7690
J9 J CHEM PHYS
JI J. Chem. Phys.
PD JUN 21
PY 2016
VL 144
IS 23
AR 234303
DI 10.1063/1.4953553
PG 6
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA DQ2NO
UT WOS:000379039300012
PM 27334158
ER
PT J
AU Vella, JH
Goldsmith, JH
Browning, AT
Limberopoulos, NI
Vitebskiy, I
Makri, E
Kottos, T
AF Vella, Jarrett H.
Goldsmith, John H.
Browning, Andrew T.
Limberopoulos, Nicholaos I.
Vitebskiy, Ilya
Makri, Eleana
Kottos, Tsampikos
TI Experimental Realization of a Reflective Optical Limiter
SO PHYSICAL REVIEW APPLIED
LA English
DT Article
ID DIMENSIONAL PHOTONIC CRYSTAL; 2-PHOTON ABSORPTION; NONLINEAR REFRACTION;
LASER-PULSES; GAAS; SEMICONDUCTORS; DEFECTS; SILICON
AB Optical limiters transmit low-intensity light, while blocking laser radiation with excessively high irradiance or fluence. A typical optical limiter involves a nonlinear material which is transparent at low light intensity and becomes opaque when the light intensity exceeds a certain level. Most of the high-level radiation is absorbed by the nonlinear material causing irreversible damage. This fundamental problem could be solved if the state of the nonlinear material changed from transparent to highly reflective (not absorptive) when the intensity becomes too high. None of the known nonlinear optical materials display such a property. A solution can be provided by a nonlinear photonic structure. In this communication, we report the experimental realization of a reflective optical limiter. The design is based on a planar microcavity composed of alternating SiO2 and Si3N4 layers with a single GaAs defect layer in the middle. At low intensity, the planar microcavity displays a strong resonant transmission via a cavity mode. As the intensity increases, two-photon absorption in GaAs kicks in, initially resulting in the microcavity-enhanced light absorption. A further increase in light intensity, though, suppresses the cavity mode along with the resonant transmission; the entire planar microcavity turns highly reflective within a broad frequency range covering the entire photonic band gap. This seemingly counterintuitive behavior is a general feature of resonant transmission via a cavity mode with purely nonlinear absorption.
C1 [Vella, Jarrett H.; Goldsmith, John H.; Browning, Andrew T.; Limberopoulos, Nicholaos I.; Vitebskiy, Ilya] Air Force Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
[Goldsmith, John H.] Wyle, Dayton, OH 45433 USA.
[Browning, Andrew T.] SelectTech Serv Corp, Centerville, OH 45433 USA.
[Makri, Eleana; Kottos, Tsampikos] Wesleyan Univ, Dept Phys, Middletown, CT 06459 USA.
RP Vella, JH (reprint author), Air Force Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
FU Air Force Office of Scientific Research (AFOSR) [LRIR12RY11COR,
LRIR14RY14COR]; MURI Grant [FA9550-14-1-0037]
FX The authors acknowledge support by the Air Force Office of Scientific
Research (AFOSR) through Program Officer Dr. Arje Nachman, award numbers
LRIR12RY11COR and LRIR14RY14COR and MURI Grant No. FA9550-14-1-0037.
NR 31
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Z9 1
U1 7
U2 8
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2331-7019
J9 PHYS REV APPL
JI Phys. Rev. Appl.
PD JUN 20
PY 2016
VL 5
IS 6
AR 064010
DI 10.1103/PhysRevApplied.5.064010
PG 7
WC Physics, Applied
SC Physics
GA DP0WH
UT WOS:000378210900001
ER
PT J
AU Musinski, WD
McDowell, DL
AF Musinski, William D.
McDowell, David L.
TI Simulating the effect of grain boundaries on microstructurally small
fatigue crack growth from a focused ion beam notch through a
three-dimensional array of grains
SO ACTA MATERIALIA
LA English
DT Article
DE Crystal plasticity; Ni-base superalloys; IN100; Microstructurally small
crack
ID NI-BASED SUPERALLOY; HIGH-CYCLE FATIGUE; POLYCRYSTALLINE MICRO
STRUCTURES; NON-METALLIC INCLUSIONS; HIGH-STRENGTH STEELS;
QUANTITATIVE-EVALUATION; BASE SUPERALLOY; PROPAGATION BEHAVIOR;
AUTOMATED-ANALYSIS; TIP DISPLACEMENTS
AB Microstructurally small crack (MSC) growth strongly depends on local microstructure and often displays oscillatory character in terms of crack growth rate (da/dN) as a function of the conventional stress intensity range due to crack tip/grain boundary interactions of MSCs. A fatigue indicator parameter (FIP)-based MSC growth model is presented for high temperature MSC growth in polycrystalline Ni-base superalloy IN100 that takes into account crack tip/grain boundary interaction. An expression for FIP evolution is evoked based on a sequence of finite element simulations for stationary cracks. The MSC growth model was fit to experiments within the context of a simple 1D crack growth model and then applied to model 3D crack growth from a simulated focused ion beam (FIB) notch. Simulations showed that the MSC growth rate became less oscillatory as the MSC front sampled more grains, and eventually converged to the LEFM response with further crack extension. Published by Elsevier Ltd on behalf of Acta Materialia Inc.
C1 [Musinski, William D.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[McDowell, David L.] Georgia Inst Technol, Woodruff Sch Mech Engn, Atlanta, GA 30332 USA.
[McDowell, David L.] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA.
RP Musinski, WD (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM william.musinski.1@us.af.mil
FU Air Force Research Laboratory [FA8650-09-2-5800]; Southwestern Ohio
Council for Higher Education; Carter N. Paden, Jr. Distinguished Chair
in Metals Processing
FX WDM is thankful for funding from the Air Force Research Laboratory under
contract FA8650-09-2-5800 with the Southwestern Ohio Council for Higher
Education. WDM would also like to acknowledge helpful technical
discussions with Sushant Jha regarding this work. DLM is grateful for
the support of the Carter N. Paden, Jr. Distinguished Chair in Metals
Processing.
NR 94
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U1 15
U2 31
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1359-6454
EI 1873-2453
J9 ACTA MATER
JI Acta Mater.
PD JUN 15
PY 2016
VL 112
BP 20
EP 39
DI 10.1016/j.actamat.2016.04.006
PG 20
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA DN8KA
UT WOS:000377326400003
ER
PT J
AU Unke, OT
Castro-Palacio, JC
Bemish, RJ
Meuwly, M
AF Unke, Oliver T.
Castro-Palacio, Juan Carlos
Bemish, Raymond J.
Meuwly, Markus
TI Collision-induced rotational excitation in N-2(+)((2)Sigma(+)(g),
v=0)-Ar: Comparison of computations and experiment
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID POTENTIAL-ENERGY SURFACE; CORRELATED MOLECULAR CALCULATIONS; CLASSICAL
TRAJECTORY CALCULATIONS; GAUSSIAN-BASIS SETS; RATE CONSTANTS; DYNAMICS;
ARGON; ION; TRANSITIONS; HYDROGEN
AB The collisional dynamics of N-2(+)((2)Sigma(+)(g)) cations with Ar atoms is studied using quasi-classical simulations. N-2(+)-Ar is a proxy to study cooling of molecular ions and interesting in its own right for molecule-to-atom charge transfer reactions. An accurate potential energy surface (PES) is constructed from a reproducing kernel Hilbert space (RKHS) interpolation based on high-level ab initio data. The global PES including the asymptotics is fully treated within the realm of RKHS. From several ten thousand trajectories, the final state distribution of the rotational quantum number of N-2(+) after collision with Ar is determined. Contrary to the interpretation of previous experiments which indicate that up to 98% of collisions are elastic and conserve the quantum state, the present simulations find a considerably larger number of inelastic collisions which supports more recent findings. Published by AIP Publishing.
C1 [Unke, Oliver T.; Castro-Palacio, Juan Carlos; Meuwly, Markus] Univ Basel, Dept Chem, Klingelbergstr 80, CH-4056 Basel, Switzerland.
[Bemish, Raymond J.] Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
[Castro-Palacio, Juan Carlos] Imperial Coll London, Dept Earth Sci & Engn, Exhibit Rd, London SW7 2AZ, England.
RP Meuwly, M (reprint author), Univ Basel, Dept Chem, Klingelbergstr 80, CH-4056 Basel, Switzerland.
EM m.meuwly@unibas.ch
FU United State Department of the Air Force; Swiss National Science
Foundation [200021, 117810]; NCCR MUST; University of Basel
FX The authors thank S. Willitsch for discussions. Part of this work was
supported by the United State Department of the Air Force which is
gratefully acknowledged (to J.C.C.-P.). Support by the Swiss National
Science Foundation through Grant Nos. 200021 and 117810, the NCCR MUST
(to M.M.), and the University of Basel is also acknowledged.
NR 42
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Z9 0
U1 9
U2 11
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-9606
EI 1089-7690
J9 J CHEM PHYS
JI J. Chem. Phys.
PD JUN 14
PY 2016
VL 144
IS 22
AR 224307
DI 10.1063/1.4951697
PG 8
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA DQ0XW
UT WOS:000378926100021
PM 27306007
ER
PT J
AU Mahoney, C
Hui, CM
Majumdar, S
Wang, ZY
Malen, JA
Tchoul, MN
Matyjaszewski, K
Bockstaller, MR
AF Mahoney, Clare
Hui, Ching Ming
Majumdar, Shubhaditya
Wang, Zongyu
Malen, Jonathan A.
Tchoul, Maxim N.
Matyjaszewski, Krzysztof
Bockstaller, Michael R.
TI Enhancing thermal transport in nanocomposites by polymer-graft
modification of particle fillers
SO POLYMER
LA English
DT Article
DE Nano composite; Thermal conductivity; Particle brush
ID TRANSFER RADICAL POLYMERIZATION; NANOCRYSTAL ARRAYS; CONDUCTIVITY;
COMPOSITES; INTERFACES; NANOPARTICLES; RESISTANCE
AB The role of polymeric tethers on the effective thermal conductivity of polymer nanocomposites is evaluated for the particular case of silica particle fillers dispersed within poly(methyl methacrylate) (PMMA). The effective thermal conductivity of both thin film and bulk composites is found to sensitively depend on the interaction between tethered and matrix chains. In particular, tethering of polymeric chains exhibiting favorable interactions with the matrix (such as poly(styrene-r-acrylonitrile), PSAN with molar composition S: AN = 3: 1) is shown to raise the effective thermal conductivity. The results point to the relevance of the 'ligand phase' (constituted of the tethered chains) as well as the tether/matrix interface in determining the thermal transport in polymer nanocomposites and suggest opportunities to raise the thermal conductivity of nanocomposite materials by the deliberate design of polymeric tethers to facilitate attractive ligand/matrix interactions. (C) 2016 Elsevier Ltd. All rights reserved.
C1 [Mahoney, Clare; Bockstaller, Michael R.] Carnegie Mellon Univ, Dept Mat Sci & Engn, 5000 Forbes Ave, Pittsburgh, PA 15213 USA.
[Hui, Ching Ming; Wang, Zongyu; Matyjaszewski, Krzysztof] Carnegie Mellon Univ, Dept Chem, 4400 Fifth Ave, Pittsburgh, PA 15213 USA.
[Majumdar, Shubhaditya; Malen, Jonathan A.] Carnegie Mellon Univ, Dept Mech Engn, 5000 Forbes Ave, Pittsburgh, PA 15213 USA.
[Tchoul, Maxim N.] OSRAM Sylvania, 71 Cherry Hill Dr, Beverly, MA 01915 USA.
[Mahoney, Clare] Air Force Res Lab, Mat & Mfg Directorate, 2941 Hobson Way,B654-R331, Wright Patterson AFB, OH 45433 USA.
RP Bockstaller, MR (reprint author), Carnegie Mellon Univ, Dept Mat Sci & Engn, 5000 Forbes Ave, Pittsburgh, PA 15213 USA.
EM bockstaller@cmu.edu
RI Bockstaller, Michael/A-9124-2011; Matyjaszewski, Krzysztof/A-2508-2008
OI Bockstaller, Michael/0000-0001-9046-9539; Matyjaszewski,
Krzysztof/0000-0003-1960-3402
FU National Science Foundation [DMR-1410845, DMR 1501324]; Department of
Energy [DE-EE0006702]; OSRAM Sylvania; American Chemical Society PRF DNI
Award [PRF51423DN10]; Bertucci Graduate Fellowship program
FX This work was primarily supported by the National Science Foundation via
grant DMR-1410845, DMR 1501324 and the Department of Energy via grant
DE-EE0006702 as well as by OSRAM Sylvania. JM acknowledges support by
the American Chemical Society PRF DNI Award (Award No. PRF51423DN10). CM
further acknowledges support by the Bertucci Graduate Fellowship
program.
NR 32
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U1 20
U2 42
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0032-3861
EI 1873-2291
J9 POLYMER
JI Polymer
PD JUN 14
PY 2016
VL 93
BP 72
EP 77
DI 10.1016/j.polymer.2016.04.014
PG 6
WC Polymer Science
SC Polymer Science
GA DL5AB
UT WOS:000375647900011
ER
PT J
AU Allen, KW
Abolmaali, F
Duran, JM
Ariyawansa, G
Limberopoulos, NI
Urbas, AM
Astratov, VN
AF Allen, Kenneth W.
Abolmaali, Farzaneh
Duran, Joshua M.
Ariyawansa, Gamini
Limberopoulos, Nicholaos I.
Urbas, Augustine M.
Astratov, Vasily N.
TI Increasing sensitivity and angle-of-view of mid-wave infrared detectors
by integration with dielectric microspheres
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID FOCAL-PLANE ARRAYS; PHOTODETECTOR
AB We observed up to 100 times enhancement of sensitivity of mid-wave infrared photodetectors in the 2-5 mu m range by using photonic jets produced by sapphire, polystyrene, and soda-lime glass microspheres with diameters in the 90-300 mu m range. By finite-difference time-domain ( FDTD) method for modeling, we gain insight into the role of the microspheres refractive index, size, and alignment with respect to the detector mesa. A combination of enhanced sensitivity with angle-of-view (AOV) up to 20 degrees is demonstrated for individual photodetectors. It is proposed that integration with microspheres can be scaled up for large focal plane arrays, which should provide maximal light collection efficiencies with wide AOVs, a combination of properties highly attractive for imaging applications. Published by AIP Publishing.
C1 [Allen, Kenneth W.; Abolmaali, Farzaneh; Astratov, Vasily N.] Univ N Carolina, Dept Phys & Opt Sci, Ctr Optoelect & Opt Commun, Charlotte, NC 28223 USA.
[Allen, Kenneth W.; Duran, Joshua M.; Ariyawansa, Gamini; Limberopoulos, Nicholaos I.; Astratov, Vasily N.] Air Force Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
[Allen, Kenneth W.; Astratov, Vasily N.] UES, Dayton, OH 45433 USA.
[Urbas, Augustine M.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Allen, Kenneth W.] Georgia Tech Res Inst, Adv Concepts Lab, Atlanta, GA 30318 USA.
RP Allen, KW; Astratov, VN (reprint author), Univ N Carolina, Dept Phys & Opt Sci, Ctr Optoelect & Opt Commun, Charlotte, NC 28223 USA.; Allen, KW; Astratov, VN (reprint author), Air Force Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.; Allen, KW; Astratov, VN (reprint author), UES, Dayton, OH 45433 USA.; Allen, KW (reprint author), Georgia Tech Res Inst, Adv Concepts Lab, Atlanta, GA 30318 USA.
EM kenneth.allen@gtri.gatech.edu; astratov@uncc.edu
FU Air Force Office of Scientific Research (AFOSR) [LRIR-RX1685]; U.S. Army
Research Office [W911NF-09-1-0450]; Center for Metamaterials, an NSF I/U
CRC [1068050]; Air Force Research Laboratory (AFRL/RYD) through AMMTIAC;
Air Force Research Laboratory (AFRL/RXC) through AMMTIAC; Alion Science
and Technology; MCF II; UES, Inc.
FX This work was supported by the Air Force Office of Scientific Research
(AFOSR) through Program Officer Dr. Harold Weinstock, award number
LRIR-RX1685. The work at UNC-Charlotte was supported by the U.S. Army
Research Office through Dr. J. T. Prater under Contract No.
W911NF-09-1-0450 and by Center for Metamaterials, an NSF I/U CRC, Award
No. 1068050. Also, this work was sponsored by the Air Force Research
Laboratory (AFRL/RYD, AFRL/RXC) through the AMMTIAC contract with Alion
Science and Technology and the MCF II contract with UES, Inc.
NR 43
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Z9 2
U1 4
U2 4
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JUN 13
PY 2016
VL 108
IS 24
AR 241108
DI 10.1063/1.4954190
PG 5
WC Physics, Applied
SC Physics
GA DQ2MU
UT WOS:000379037200008
ER
PT J
AU Lockhart, P
Little, BK
Slaten, BL
Mills, G
AF Lockhart, PaviElle
Little, Brian K.
Slaten, B. L.
Mills, G.
TI Photogeneration of H2O2 in Water-Swollen SPEEK/PVA Polymer Films
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID POLY(ETHER ETHER KETONE); POLY(VINYL ALCOHOL); HYDROGEN-PEROXIDE;
AQUEOUS-SOLUTION; PHOTOCATALYTIC PRODUCTION; PHOTOCHEMICAL-REACTIONS;
PHOTO-REDUCTION; CROSS-LINKING; OXYGEN; BENZOPHENONE
AB Efficient reduction of O-2 took place via illumination with 350 nm photons of cross-linked films containing a blend of sulfonated poly(ether etherketone) and poly(vinyl alcohol) in contact with air-saturated aqueous solutions. Swelling of the solid macromolecular matrices in H2O enabled O-2 diffusion into the films and also continuous extraction of the photogenerated H2O2, which was the basis for a method that allowed quantification of the product. Peroxide formed with similar efficiencies in films containing sulfonated polyketones prepared from different precursors and the initial photochemical process was found to be the rate-determining step. Generation of H2O2 was most proficient in the range of 4.9 <= pH <= 8 with a quantum yield of 0.2, which was 10 times higher than the efficiencies determined for solutions of he polymer blend. Increases in temperature as well as [O-2] in solution were factors that enhanced the H2O2 generation. H2O2 quantum yields as high as 0.6 were achieved in H2O/CH3CN mixtures with low water concentrations, but peroxide no longer formed when film swelling was suppressed. A Mechanism involving reduction of O-2 by photogenerated alpha-hydroxy radicals from the polyketone in competition with second-order radical decay processes explains the kinetic features. Higher yields result from the films because cross-links present in them hinder diffusion of the radicals, limiting their decay and enhancing the oxygen reduction pathway.
C1 [Lockhart, PaviElle; Little, Brian K.; Mills, G.] Auburn Univ, Dept Chem & Biochem, Auburn, AL 36849 USA.
[Slaten, B. L.] Auburn Univ, Dept Consumer & Design Sci, Auburn, AL 36849 USA.
[Little, Brian K.] Univ Dayton, Res Inst, US Air Force, Res Lab, Eglin AFB, FL 32542 USA.
RP Mills, G (reprint author), Auburn Univ, Dept Chem & Biochem, Auburn, AL 36849 USA.
EM millsge@auburn.edu
FU NTC [C06-AC01]; Auburn University OVPR&ED Intramural Grant
FX The authors are grateful to R. Leibfried (Victrex USA Inc.) and to J.
Scherble (Evonik, Germany) for generous gifts of PEEK samples. We thank
Md. S. Islam for his help during DSC determinations, R. Blumenthal for
useful discussions, and D. Berry (Berry Industrial) for his continuous
advice and support. Acquisition of the DSC instrumentation was made
possible by an Auburn University OVPR&ED Intramural Grant. The work
described here was supported by NTC through contract C06-AC01.
NR 54
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U1 4
U2 4
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1089-5639
J9 J PHYS CHEM A
JI J. Phys. Chem. A
PD JUN 9
PY 2016
VL 120
IS 22
BP 3867
EP 3877
DI 10.1021/acs.jpca.6b00442
PG 11
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA DO5SI
UT WOS:000377842700005
PM 27232441
ER
PT J
AU Ying, L
Huang, DH
Lai, YC
AF Ying, Lei
Huang, Danhong
Lai, Ying-Cheng
TI Multistability, chaos, and random signal generation in semiconductor
superlattices
SO PHYSICAL REVIEW E
LA English
DT Article
ID NEGATIVE DIFFERENTIAL CONDUCTIVITY; RANDOM NUMBER GENERATORS; STRONG
ELECTRIC-FIELD; CURRENT INSTABILITY; GAAS/ALAS SUPERLATTICES; TERAHERTZ
TECHNOLOGY; NONLINEAR TRANSPORT; BALANCE-EQUATIONS; ENERGY-BAND;
DYNAMICS
AB Historically, semiconductor superlattices, artificial periodic structures of different semiconductor materials, were invented with the purpose of engineering or manipulating the electronic properties of semiconductor devices. A key application lies in generating radiation sources, amplifiers, and detectors in the "unusual" spectral range of subterahertz and terahertz (0.1-10 THz), which cannot be readily realized using conventional radiation sources, the so-called THz gap. Efforts in the past three decades have demonstrated various nonlinear dynamical behaviors including chaos, suggesting the potential to exploit chaos in semiconductor superlattices as random signal sources (e.g., random number generators) in the THz frequency range. We consider a realistic model of hot electrons in semiconductor superlattice, taking into account the induced space charge field. Through a systematic exploration of the phase space we find that, when the system is subject to an external electrical driving of a single frequency, chaos is typically associated with the occurrence of multistability. That is, for a given parameter setting, while there are initial conditions that lead to chaotic trajectories, simultaneously there are other initial conditions that lead to regular motions. Transition to multistability, i.e., the emergence of multistability with chaos as a system parameter passes through a critical point, is found and argued to be abrupt. Multistability thus presents an obstacle to utilizing the superlattice system as a reliable and robust random signal source. However, we demonstrate that, when an additional driving field of incommensurate frequency is applied, multistability can be eliminated, with chaos representing the only possible asymptotic behavior of the system. In such a case, a random initial condition will lead to a trajectory landing in a chaotic attractor with probability 1, making quasiperiodically driven semiconductor superlattices potentially as a reliable device for random signal generation to fill the THz gap. The interplay among noise, multistability, and chaos is also investigated.
C1 [Ying, Lei; Lai, Ying-Cheng] Arizona State Univ, Sch Elect Comp & Energy Engn, Tempe, AZ 85287 USA.
[Huang, Danhong] Space Vehicles Directorate, Air Force Res Lab, Kirtland AFB, NM 87117 USA.
[Huang, Danhong] Univ New Mexico, Ctr High Technol Mat, 1313 Goddard St, Albuquerque, NM 87106 USA.
[Lai, Ying-Cheng] Arizona State Univ, Dept Phys, Tempe, AZ 85287 USA.
RP Lai, YC (reprint author), Arizona State Univ, Sch Elect Comp & Energy Engn, Tempe, AZ 85287 USA.; Lai, YC (reprint author), Arizona State Univ, Dept Phys, Tempe, AZ 85287 USA.
EM Ying-Cheng.Lai@asu.edu
FU AFOSR [FA9550-15-1-0151]; ONR [N00014-15-1-2405]
FX This work was supported by AFOSR under Grant No. FA9550-15-1-0151 and by
ONR under Grant No. N00014-15-1-2405.
NR 95
TC 1
Z9 1
U1 5
U2 8
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2470-0045
EI 2470-0053
J9 PHYS REV E
JI Phys. Rev. E
PD JUN 8
PY 2016
VL 93
IS 6
AR 062204
DI 10.1103/PhysRevE.93.062204
PG 9
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA DN8NP
UT WOS:000377336200002
PM 27415252
ER
PT J
AU Gao, Y
Wang, X
Xie, L
Hu, Z
Lin, H
Zhou, Z
Nan, T
Yang, X
Howe, BM
Jones, JG
Brown, GJ
Sun, NX
AF Gao, Y.
Wang, X.
Xie, L.
Hu, Z.
Lin, H.
Zhou, Z.
Nan, T.
Yang, X.
Howe, B. M.
Jones, J. G.
Brown, G. J.
Sun, N. X.
TI Giant electric field control of magnetism and narrow ferromagnetic
resonance linewidth in FeCoSiB/Si/SiO2/PMN-PT multiferroic
heterostructures
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID ROOM-TEMPERATURE; PHASE-SHIFTER; FILMS; MEMORY; VOLTAGE; FERRITE; BIAS
AB It has been challenging to achieve combined strong magnetoelectric coupling and narrow ferromagnetic resonance (FMR) linewidth in multiferroic heterostructures. Electric field induced large effective field of 175 Oe and narrow FMR linewidth of 40 Oe were observed in FeCoSiB/Si/SiO2/PMN-PT heterostructures with substrate clamping effect minimized through removing the Si substrate. As a comparison, FeCoSiB/PMN-PT heterostructures with FeCoSiB film directly deposited on PMN-PT showed a comparable voltage induced effective magnetic field but a significantly larger FMR linewidth of 283 Oe. These multiferroic heterostructures exhibiting combined giant magnetoelectric coupling and narrow ferromagnetic resonance linewidth offer great opportunities for integrated voltage tunable RF magnetic devices. Published by AIP Publishing.
C1 [Gao, Y.; Wang, X.; Xie, L.; Lin, H.; Nan, T.; Sun, N. X.] Northeastern Univ, Dept Elect & Comp Engn, Boston, MA 02115 USA.
[Hu, Z.; Howe, B. M.; Jones, J. G.; Brown, G. J.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Zhou, Z.] Xi An Jiao Tong Univ, Elect Mat Res Lab, Minist Educ, Key Lab, Xian 710049, Peoples R China.
[Zhou, Z.] Xi An Jiao Tong Univ, Int Ctr Dielect Res, Xian 710049, Peoples R China.
[Yang, X.] Beijing Inst Technol, Sch Informat & Elect, Beijing 100081, Peoples R China.
[Gao, Y.] Winchester Technol LLC, Winchester, MA USA.
RP Sun, NX (reprint author), Northeastern Univ, Dept Elect & Comp Engn, Boston, MA 02115 USA.
EM n.sun@neu.edu
RI Sun, Nian Xiang/F-9590-2010; Gao, Yuan/E-4277-2016;
OI Sun, Nian Xiang/0000-0002-3120-0094; Gao, Yuan/0000-0002-2444-1180;
Jones, John/0000-0001-8271-0038
FU W. M. Keck Foundation; National Science Foundation (NSF) [1160504,
1533484]; National Science Foundation under NSF Award [ECS-0335765]
FX The work was financially supported by W. M. Keck Foundation, National
Science Foundation (NSF) Award Nos. 1160504 and 1533484, and performed
in part at the Center for Nanoscale Systems (CNS), a member of the
National Nanotechnology Infrastructure Network (NNIN), which is
supported by the National Science Foundation under NSF Award No.
ECS-0335765. CNS is part of Harvard University.
NR 59
TC 1
Z9 1
U1 13
U2 28
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JUN 6
PY 2016
VL 108
IS 23
AR 232903
DI 10.1063/1.4953456
PG 5
WC Physics, Applied
SC Physics
GA DQ0XI
UT WOS:000378924700030
ER
PT J
AU Cole, RE
Clark, HL
Heileson, J
DeMay, J
Smith, MA
AF Cole, Renee E.
Clark, Heidi L.
Heileson, Jeffery
DeMay, Jordan
Smith, Martha A.
TI Normal Weight Status in Military Service Members Was Associated With
Intuitive Eating Characteristic
SO MILITARY MEDICINE
LA English
DT Article
ID BODY-MASS INDEX; PSYCHOMETRIC EVALUATION; PHYSICAL-ACTIVITY;
UNITED-STATES; OBESITY; BEHAVIORS; HEALTH; MOTIVATION; EXERCISE; ADULTS
AB The purpose of this study was to determine the relationship between individual weight status and intuitive eating or motivation for eating characteristics. Participants were predominantly white (57%), Army (91%), enlisted (72%), males (71%), with a mean age of 30 +/- 9 years and mean body mass index (BMI) of 27.0 +/- 4.2 kg/m(2). The cross-sectional, descriptive study included active duty service members (n = 295) recruited from Texas and Washington. Validated Motivation for Eating Scale (MFES) and Intuitive Eating Scale were administered and BMI (m/kg(2)) was dichotomized at <25 or = 25 kg/m(2). Descriptive, correlation, t-test, and logistic regression analysis were conducted for BMI category with demographic, lifestyle, and MFES/Intuitive Eating Scale scores (a = 0.05; 80% power). Thirty-six percent were normal BMI (22.7 +/- 1.6 kg/m(2)) and 64% were overweight/ obese BMI (29.3 +/- 3.3 kg/m(2)). Mean BMI was 27.8 +/- 4.2 kg/m(2) (males) and 24.8 +/- 3.4 kg/m(2) (females) (p < 0.001). Physical MFES type was predominant (77% normal BMI vs. 66% overweight; p = 0.001). Males ate for physical rather than emotional reasons (p = 0.014). Each 1-point increase in Reliance on Internal Hunger Satiety Score was associated with 34% lower odds of being overweight. Disparity existed between sex and intuitive eating characteristic. Increasing awareness of eating influences may improve weight-related dietary behaviors.
C1 [Cole, Renee E.] US Army, Environm Med Res Inst, 15 Kansas St, Natick, MA 01760 USA.
[Clark, Heidi L.] US Air Force, Joint Base San Antonio Lackland, 59th Med Wing,1701 Kenly Ave, San Antonio, TX 78236 USA.
[Heileson, Jeffery] Blanchfield Army Community Hosp, Nutr Care Div, 650 Joel Dr, Ft Campbell, KY 42223 USA.
[DeMay, Jordan] Moncrief Army Community Hosp, Nutr Care Div, 4500 Stuart St, Ft Jackson, SC 29207 USA.
[Smith, Martha A.] Brian Allgood Army Community Hosp, 19 Hangangno Dong, Yongsan, South Korea.
RP Cole, RE (reprint author), US Army, Environm Med Res Inst, 15 Kansas St, Natick, MA 01760 USA.
NR 44
TC 0
Z9 0
U1 2
U2 2
PU ASSOC MILITARY SURG US
PI BETHESDA
PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 USA
SN 0026-4075
EI 1930-613X
J9 MIL MED
JI Milit. Med.
PD JUN
PY 2016
VL 181
IS 6
BP 589
EP 595
DI 10.7205/MILMED-D-15-00250
PG 7
WC Medicine, General & Internal
SC General & Internal Medicine
GA DW5LO
UT WOS:000383686900020
PM 27244071
ER
PT J
AU Mohan, MT
Sritharan, SS
AF Mohan, Manil T.
Sritharan, Sivaguru S.
TI NEW METHODS FOR LOCAL SOLVABILITY OF QUASILINEAR SYMMETRIC HYPERBOLIC
SYSTEMS
SO EVOLUTION EQUATIONS AND CONTROL THEORY
LA English
DT Article
DE Quasilinear symmetric hyperbolic equations; commutator estimates; local
monotonicity; Minty-Browder; optimal control
ID NAVIER-STOKES EQUATIONS
AB In this work we establish the local solvability of quasilinear symmetric hyperbolic system using local monotonicity method and frequency truncation method. The existence of an optimal control is also proved as an application of these methods.
C1 [Mohan, Manil T.] US Air Force, Dept Math & Stat, Inst Technol, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
[Sritharan, Sivaguru S.] US Air Force, Off Provost & Vice Chancellor, Inst Technol, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
RP Sritharan, SS (reprint author), US Air Force, Off Provost & Vice Chancellor, Inst Technol, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM manil.thankama.nimolian@afit.edu; sivaguru.sritharan@afit.edu
OI Sritharan, Sivaguru/0000-0003-2845-332X
FU National Research Council (NRC); U. S. Army Research Office, Probability
and Statistics program
FX Manil T. Mohan would like to thank National Research Council (NRC) for
Research Associateship Award. S. S. Sritharan's work has been funded by
U. S. Army Research Office, Probability and Statistics program. Manil T.
Mohan would like to thank Air Force Institute of Technology (AFIT) for
providing stimulating scientific environment and resources. The authors
would also like to thank the anonymous reviewer for his useful and
valuable suggestions.
NR 23
TC 1
Z9 1
U1 0
U2 0
PU AMER INST MATHEMATICAL SCIENCES-AIMS
PI SPRINGFIELD
PA PO BOX 2604, SPRINGFIELD, MO 65801-2604 USA
SN 2163-2480
J9 EVOL EQU CONTROL THE
JI Evol. Equ. Control Theory
PD JUN
PY 2016
VL 5
IS 2
BP 273
EP 302
DI 10.3934/eect.2016005
PG 30
WC Mathematics, Applied; Mathematics
SC Mathematics
GA DX9KV
UT WOS:000384715200005
ER
PT J
AU Zhang, ZP
Nowak, MJ
Wicks, M
Wu, ZQ
AF Zhang, Zhiping
Nowak, Michael J.
Wicks, Michael
Wu, Zhiqiang
TI Bio-Inspired RF Steganography via Linear Chirp Radar Signals
SO IEEE COMMUNICATIONS MAGAZINE
LA English
DT Article
ID MODULATION
AB The chirp signal is one of the first bio-inspired signals commonly used in RF applications where the term chirp is a reference to the chirping sound made by birds. It has since been recognized that birds communicate through such chirping sounds to attract other birds of the same species, to transmit an alarm for specific threats, and so on. However, birds of a different species, or sometime even birds in a different social group within a species, are unable to connect a specific meaning to certain calls - they will simply hear a bird chirping. Inspired by such, this article provides a tutorial on a novel RF steganography scheme to conceal digital communication in linear chirp radar signals. We first provide a review of the linear chirp signal and existing communication systems using chirp waveforms. Next we discuss how to implement the RF steganography and hide digitally modulated communication information inside a linear chirp radar signal to prevent an enemy from detecting the existence of such hidden information. A new modulation called reduced phase shift keying is employed to make the modulated chirp waveform almost identical to the unmodulated chirp signal. Furthermore, variable symbol durations are employed to eliminate cyclostationary features that might otherwise be exploited by an enemy to detect the existence of the hidden information.
C1 [Zhang, Zhiping] Wright State Univ, Dept Elect Engn, Broadband Mobile & Wireless Networking Lab, Dayton, OH 45435 USA.
[Wu, Zhiqiang] Wright State Univ, Dept Elect Engn, Dayton, OH 45435 USA.
[Nowak, Michael J.] Air Force Res Lab, Spectral Warfare Div Sensors Directorate, Wright Patterson AFB, OH USA.
[Wicks, Michael] Univ Dayton, Dayton, OH 45469 USA.
RP Wu, ZQ (reprint author), Wright State Univ, Dept Elect Engn, Dayton, OH 45435 USA.
EM zhiqiang.wu@wright.edu
FU National Science Foundation [1323240]; Air Force Research Laboratory
FX This material is based on work supported by the National Science
Foundation under Grant No. 1323240 and the Air Force Research
Laboratory. Any opinions, findings, conclusions, or recommendations
expressed in this material are those of the authors and do not
necessarily reflect the views of the funding agencies.
NR 12
TC 0
Z9 0
U1 0
U2 0
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0163-6804
EI 1558-1896
J9 IEEE COMMUN MAG
JI IEEE Commun. Mag.
PD JUN
PY 2016
VL 54
IS 6
BP 82
EP 86
PG 5
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA DW1XE
UT WOS:000383436000013
ER
PT J
AU Foster, JC
Erickson, PJ
Baker, DN
Jaynes, AN
Mishin, EV
Fennel, JF
Li, X
Henderson, MG
Kanekal, SG
AF Foster, J. C.
Erickson, P. J.
Baker, D. N.
Jaynes, A. N.
Mishin, E. V.
Fennel, J. F.
Li, X.
Henderson, M. G.
Kanekal, S. G.
TI Observations of the impenetrable barrier, the plasmapause, and the VLF
bubble during the 17 March 2015 storm
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID HIGHLY RELATIVISTIC ELECTRONS; EARTHS INNER MAGNETOSPHERE; ALLEN PROBES
OBSERVATIONS; RADIATION BELTS; ZONE ELECTRONS; WAVES; PRECIPITATION;
ACCELERATION; SCATTERING; EMISSIONS
AB Van Allen Probes observations during the 17 March 2015 major geomagnetic storm strongly suggest that VLF transmitter-induced waves play an important role in sculpting the earthward extent of outer zone MeV electrons. A magnetically confined bubble of very low frequency (VLF) wave emissions of terrestrial, human-produced origin surrounds the Earth. The outer limit of the VLF bubble closely matches the position of an apparent barrier to the inward extent of multi-MeV radiation belt electrons near 2.8 Earth radii. When the VLF transmitter signals extend beyond the eroded plasmapause, electron loss processes set up near the outer extent of the VLF bubble create an earthward limit to the region of local acceleration near L = 2.8 as MeV electrons are scattered into the atmospheric loss cone.
C1 [Foster, J. C.; Erickson, P. J.] MIT, Haystack Observ, Westford, MA 01886 USA.
[Baker, D. N.; Jaynes, A. N.; Li, X.] Univ Colorado, Atmospher & Space Phys Lab, Campus Box 392, Boulder, CO 80309 USA.
[Mishin, E. V.] Air Force Res Lab, Albuquerque, NM USA.
[Fennel, J. F.] Aerosp Corp, Space Sci Lab, Los Angeles, CA 90009 USA.
[Henderson, M. G.] Los Alamos Natl Lab, Los Alamos, NM USA.
[Kanekal, S. G.] NASA, Goddard Space Flight Ctr, Greenbelt, MD USA.
RP Foster, JC (reprint author), MIT, Haystack Observ, Westford, MA 01886 USA.
EM jfoster@haystack.mit.edu
RI Henderson, Michael/A-3948-2011
OI Henderson, Michael/0000-0003-4975-9029
FU University of Minnesota; Air Force Office of Scientific Research;
JHU/APL under NASA [967399, NAS5-01072]
FX We thank W. Kurth for input concerning the EMFISIS wave observations, J.
Bonnell for discussions of EFW antenna sensitivity, M. Starks for
guidance on VLF propagation characteristics, and J. Albert for helpful
discussions and for providing the relativistic electron resonance code
used in Figure 7. J.C.F. and P.J.E. received support from a University
of Minnesota subcontract award to the Massachusetts Institute of
Technology. E.M. was supported by the Air Force Office of Scientific
Research. Van Allen Probes data access was provided through the Johns
Hopkins University/Applied Physics Lab Mission Operations Center and the
Los Alamos National Laboratory Science Operations Center. This work was
supported by JHU/APL contract 967399 under NASA's prime contract
NAS5-01072. All Van Allen Probes data used are publicly available at
(www.rbsp-ect.lanl.gov).
NR 29
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Z9 2
U1 0
U2 0
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9380
EI 2169-9402
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD JUN
PY 2016
VL 121
IS 6
BP 5537
EP 5548
DI 10.1002/2016JA022509
PG 12
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA DW1RU
UT WOS:000383421100039
ER
PT J
AU Weimer, DR
Sutton, EK
Mlynczak, MG
Hunt, LA
AF Weimer, D. R.
Sutton, E. K.
Mlynczak, M. G.
Hunt, L. A.
TI Intercalibration of neutral density measurements for mapping the
thermosphere
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID ACCELEROMETER DATA; SOLAR; ATMOSPHERE; STORMS; CHAMP; MODEL; ENERGY;
SPHERE
AB This paper describes a technique for mapping exospheric temperatures, derived from neutral density measurements from the Challenging Mini-satellite Payload (CHAMP) and Gravity Recovery and Climate Experiment (GRACE) satellites. The Naval Reasearch Laboratory Mass Spectrometer, Incoherent Scatter Radar Extended Model (NRLMSISE-00) thermosphere model is used for the conversion. Adjustments for each satellite were needed in order for the time-averaged densities to agree with the model. It was necessary to correct for inexact modeling of the annual and semiannual oscillations in the density, as well as the declining densities during the solar minimum. It was found that a time-varying perturbation in the atomic oxygen in the model could produce a good agreement at both altitudes. The time series of this oxygen variation was found to have a very high correlation with independent measurements of CO2 emissions measured with the Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) instrument. The temperature data are averaged on a spherical grid having equal areas in each pixel, avoiding functional fits that would blur finer details. The use of solar magnetic rather than geographic coordinates enhances the auroral ovals. There are strong elevations in the exospheric temperatures in the polar regions, particularly near the dayside cusp. Spatial filtering with spherical wavelets is used to remove statistical fluctuations, although some details are lost. The exospheric temperature maps are well ordered by the nitric oxide emission measurements from SABER. The technique that is described here could be applied to future improvements of empirical density models, having an accuracy and spatial resolution that is not presently available.
C1 [Weimer, D. R.] Virginia Tech, Ctr Space Sci & Engn Res, Blacksburg, VA 24061 USA.
[Weimer, D. R.] Natl Inst Aerosp, Hampton, VA 23666 USA.
[Sutton, E. K.] Air Force Res Lab, Space Environm Branch, Albuquerque, NM USA.
[Mlynczak, M. G.] NASA, Langley Res Ctr, Sci Directorate, Hampton, VA 23665 USA.
[Hunt, L. A.] Sci Syst & Applicat Inc, Hampton, VA USA.
RP Weimer, DR (reprint author), Virginia Tech, Ctr Space Sci & Engn Res, Blacksburg, VA 24061 USA.; Weimer, DR (reprint author), Natl Inst Aerosp, Hampton, VA 23666 USA.
EM dweimer@vt.edu
RI Sutton, Eric/A-1574-2016;
OI Sutton, Eric/0000-0003-1424-7189; Hunt, Linda/0000-0002-5330-541X
FU NASA [NNX13AD73G]; NASA Heliophysics Division
Thermosphere-Ionosphere-Mesosphere Energetics and Dynamics Project
FX The authors thank J. T. Emmert and J. M. Picone for useful comments and
suggestions. The work at Virginia Tech was supported by NASA grant
NNX13AD73G. Authors M.G.M. and L.A.H. acknowledge support from the NASA
Heliophysics Division Thermosphere-Ionosphere-Mesosphere Energetics and
Dynamics Project. The CHAMP and GRACE density measurements are available
by contacting author E.K.S. (email: eric.k.sutton@gmail.com). The code
for the NRLMSISE-00 neutral density model is available from the NASA
CCMC, at
ftp://hanna.ccmc.gsfc.nasa.gov/pub/modelweb/atmospheric/msis/nrlmsise00/
. The empirical W05 heating model is available by contacting author
D.R.W. (email: dweimer@vt.edu). The SABER measurements can be obtained
from author M.G.M. (email: m.g.mlynczak@nasa.gov). The HEALPix software
is available at http://healpix.jpl.nasa.gov/index.shtml. The iSAP
wavelet software is at http://www.cosmostat.org/software/isap/ and
http://jstarck.free.fr/mrs.html.
NR 43
TC 1
Z9 1
U1 10
U2 10
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9380
EI 2169-9402
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD JUN
PY 2016
VL 121
IS 6
BP 5975
EP 5990
DI 10.1002/2016JA022691
PG 16
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA DW1RU
UT WOS:000383421100074
ER
PT J
AU Van Hook, M
AF Van Hook, Matthew
TI Patriotism and Piety: Federalist Politics and Religious Struggle in the
New American Nation
SO AMERICAN POLITICAL THOUGHT
LA English
DT Book Review
C1 [Van Hook, Matthew] US Air Force Acad, Colorado Springs, CO 80840 USA.
RP Van Hook, M (reprint author), US Air Force Acad, Colorado Springs, CO 80840 USA.
NR 1
TC 0
Z9 0
U1 2
U2 2
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA
SN 2161-1580
EI 2161-1599
J9 AM POLIT THOUGHT
JI Am. Polit. Thought
PD SUM
PY 2016
VL 5
IS 3
BP 519
EP 522
DI 10.1086/687401
PG 4
WC Political Science
SC Government & Law
GA DS9IZ
UT WOS:000381097600007
ER
PT J
AU Smith, JE
Chavez, JL
Hagen, JA
Kelley-Loughnane, N
AF Smith, Joshua E.
Chavez, Jorge L.
Hagen, Joshua A.
Kelley-Loughnane, Nancy
TI Design and Development of Aptamer-Gold Nanoparticle Based Colorimetric
Assays for In-the-field Applications
SO JOVE-JOURNAL OF VISUALIZED EXPERIMENTS
LA English
DT Article
DE Biochemistry; Issue 112; colorimetric assay; gold nanoparticles;
aptamer; colorimetric app; nucleic acids; nanotechnology; biosensors;
optical sensors
ID DNA; SEQUENCES; BIOLOGY; CELLS
AB The design and development of an aptamer-gold nanoparticle (AuNP) colorimetric assay for the detection of small molecules for in-the-field applications was examined. Target selective AuNP based color assays have been developed in controlled proof-of-concept laboratory settings. However, these schemes have not been exerted to a point of failure to determine their practical use beyond laboratory settings. This work describes a generic approach to design, develop, and troubleshoot an aptamer-AuNP colorimetric assay for small molecule analytes and using the assay for in-the-field settings. The assay is advantageous because adsorbed aptamers passivate the nanoparticle surfaces and provide a means to reduce and eliminate false positive responses to non-target analytes. Transitioning this system to practical uses required defining not only the shelf-life of the aptamer-AuNP assay, but establishing methods and procedures for extending the long-term storage capabilities. Also, one of the recognized concerns with colorimetric readout is the burden placed on analysts to accurately identify often subtle changes in color. To lessen the responsibility on analysts in the field, a color analysis protocol was designed to perform the color identification duties without the need for performing this task on laboratory grade equipment. The method for creating and testing the data analysis protocol is described. However to understand and influence the design of adsorbed aptamer assays, the interactions associated with the aptamer, target, and AuNPs require further study. The knowledge gained could lead to tailoring aptamers for improved functionality.
C1 [Smith, Joshua E.] Alvernia Univ, Dept Sci & Math, Reading, PA USA.
[Chavez, Jorge L.; Hagen, Joshua A.; Kelley-Loughnane, Nancy] Air Force Res Lab, Performance Wing 711Human, Wright Patterson AFB, OH 45433 USA.
[Chavez, Jorge L.] UES Inc, Beavercreek, OH USA.
RP Kelley-Loughnane, N (reprint author), Air Force Res Lab, Performance Wing 711Human, Wright Patterson AFB, OH 45433 USA.
EM nancy.kelley-loughnane.1@us.af.mil
FU Air Force Office of Scientific Research; Assistant Secretary of Defense
for Research and Engineering (Defense Biometrics and Forensics Office);
National Research Council Research Associateship Award at Air Force
Research Laboratory
FX This work was partially funded by the Air Force Office of Scientific
Research and the Assistant Secretary of Defense for Research and
Engineering (Defense Biometrics and Forensics Office). JES participation
was supported by a National Research Council Research Associateship
Award at Air Force Research Laboratory.
NR 24
TC 0
Z9 0
U1 13
U2 13
PU JOURNAL OF VISUALIZED EXPERIMENTS
PI CAMBRIDGE
PA 1 ALEWIFE CENTER, STE 200, CAMBRIDGE, MA 02140 USA
SN 1940-087X
J9 JOVE-J VIS EXP
JI J. Vis. Exp.
PD JUN
PY 2016
IS 112
AR e54063
DI 10.3791/54063
PG 10
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA DS0CX
UT WOS:000380264100053
ER
PT J
AU Meats, S
AF Meats, Stephen
TI The Roots of Feminism: A Case Study
SO MIDWEST QUARTERLY-A JOURNAL OF CONTEMPORARY THOUGHT
LA English
DT Poetry
C1 [Meats, Stephen] US Air Force Acad, Colorado Springs, CO 80840 USA.
[Meats, Stephen] Univ Tampa, Tampa, FL 33606 USA.
RP Meats, S (reprint author), US Air Force Acad, Colorado Springs, CO 80840 USA.
NR 0
TC 0
Z9 0
U1 1
U2 1
PU PITTSBURG STATE UNIV
PI PITTSBURG
PA MIDWEST QUARTERLY, PITTSBURG, KS 66762 USA
SN 0026-3451
J9 MIDWEST QUART
JI Midwest Q.-J. Contemp. Thought
PD SUM
PY 2016
VL 57
IS 4
SI SI
BP 390
EP 391
PG 2
WC Literary Theory & Criticism
SC Literature
GA DS1TM
UT WOS:000380383600016
ER
PT J
AU Majumder, U
Bell, MR
Rangaswamy, M
AF Majumder, Uttam
Bell, Mark R.
Rangaswamy, Muralidhar
TI Design and Analysis of Radar Waveforms Achieving Transmit and Receive
Orthogonality
SO IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
LA English
DT Article
ID AMBIGUITY FUNCTION
AB This paper presents the design and analysis of orthogonal, Doppler-tolerant waveforms for waveform agile radar (e.g. multiple-input multiple-output (MIMO) radar) applications. Previous work has given little consideration to the design of radar waveforms that remain orthogonal when they are received. Our research is focused on: 1) developing sets of waveforms that are orthogonal on both transmit and receive, and 2) ensuring that these waveforms are Doppler tolerant when properly processed. Our proposed solution achieves the above-mentioned goals by incorporating direct sequence spread spectrum (DSSS) coding techniques on linear frequency modulated (LFM) signals. We call this spread spectrum coded LFM (SSCL) signaling. Our transmitted LFM waveforms are rendered orthogonal with a unique spread spectrum (SS) code. At the receiver, the echo signal will be decoded using its spreading code. In this manner, transmitted orthogonal waveforms can be match filtered only with the intended received signals. From analytical expressions of the waveforms we have designed and from simulation results, we found that: 1) cross-ambiguity function (CAF) of two LFM SS coded (orthogonal) waveforms is small for all delays and Dopplers (i.e. transmit and receive signals satisfy near orthogonality constraint); 2) the length of the SS code determines the amount of interference suppression (i.e., complete orthogonal or near orthogonal of the received signal); 3) we can process the same received signal in two different ways; one method can provide LFM signal resolution and the other method can provide ultrahigh resolution; 4) biorthogonal codes can be used to reduce bandwidth when code length is large. Our proposed waveforms inherit multiple attributes (e.g. chirp diversity, code diversity, frequency diversity) of diverse waveforms.
C1 [Majumder, Uttam] Air Force Res Lab, Informat Directorate, Rome, NY USA.
[Bell, Mark R.] Purdue Univ, W Lafayette, IN 47907 USA.
[Rangaswamy, Muralidhar] Air Force Res Lab, Sensors Directorate, RF Exploitat Technol Branch, Wright Patterson AFB, OH USA.
[Majumder, Uttam] Air Force Res Lab, Rome, NY USA.
[Majumder, Uttam] Purdue Univ, Dept Elect & Comp Engn, 465 Northwestern Ave, W Lafayette, IN 47906 USA.
[Rangaswamy, Muralidhar] Air Force Res Lab, Sensors Directorate, Exploitat Branch AFRL RYAP, 2241 Avionics Circle, Wright Patterson AFB, OH 45433 USA.
[Rangaswamy, Muralidhar] Air Force Res Lab, Wright Patterson AFB, OH USA.
[Rangaswamy, Muralidhar] Purdue Univ, W Lafayette, IN 47907 USA.
RP Majumder, U (reprint author), Air Force Res Lab, Rome, NY USA.; Majumder, U (reprint author), Purdue Univ, Dept Elect & Comp Engn, 465 Northwestern Ave, W Lafayette, IN 47906 USA.
EM ukmccny@gmail.com
NR 25
TC 0
Z9 0
U1 2
U2 4
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9251
EI 1557-9603
J9 IEEE T AERO ELEC SYS
JI IEEE Trans. Aerosp. Electron. Syst.
PD JUN
PY 2016
VL 52
IS 3
BP 1056
EP 1066
DI 10.1109/TAES.2016.140248
PG 11
WC Engineering, Aerospace; Engineering, Electrical & Electronic;
Telecommunications
SC Engineering; Telecommunications
GA DR7XU
UT WOS:000380113800008
ER
PT J
AU Benson, S
Chen, CIH
Lin, DM
Liou, LL
AF Benson, Stephen
Chen, Chien-In H.
Lin, David M.
Liou, Lihyeh L.
TI Digital Linear Chirp Receiver for High Chirp Rates With High Resolution
Time-of-Arrival and Time-of-Departure Estimation
SO IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
LA English
DT Article
ID RADAR WAVE-FORM; SIGNAL; TRANSFORM
AB The use of chirp signals in modern radar and ranging systems have numerous benefits. They are extensively used to improve signal-to-noise ratio and range resolution. The performance capabilities of these signals are directly related to their time-bandwidth product, i.e., the duration and bandwidth of the pulse. Ultra-wideband chirp signals are further desirable because they span a large bandwidth, making them resistant to narrowband environmental interference. The accurate detection and measurement of high chirp signals is difficult due to the necessity of a high-sampling analog-digital converter, a target measurement platform with high computational power, and a time-of-arrival (TOA) estimator with high temporal resolution. The difficulty of the problem is further compounded with the requirement that no a priori knowledge of the signal, noise, or operating environment is known. This paper presents a practical approach and implementation of a high linear chirp rate receiver and TOA estimator pair capable of detecting and measuring stationary radio frequency pulses as well as linear chirp rates up to 1.18 GHz in 400 ns. The high-resolution TOA algorithm and linear chirp receiver have been prototyped, synthesized, and placed and routed for a Virtex 6 SX475 FPGA.
C1 [Benson, Stephen; Chen, Chien-In H.] Wright State Univ, Elect Engn, 3640 Colonel Glenn Highway, Dayton, OH 45435 USA.
[Lin, David M.; Liou, Lihyeh L.] Air Force Res Lab, Wright Patterson AFB, OH USA.
RP Chen, CIH (reprint author), Wright State Univ, Elect Engn, 3640 Colonel Glenn Highway, Dayton, OH 45435 USA.
EM henry.chen@wright.edu
NR 17
TC 0
Z9 0
U1 6
U2 6
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9251
EI 1557-9603
J9 IEEE T AERO ELEC SYS
JI IEEE Trans. Aerosp. Electron. Syst.
PD JUN
PY 2016
VL 52
IS 3
BP 1146
EP 1154
DI 10.1109/TAES.2016.140656
PG 9
WC Engineering, Aerospace; Engineering, Electrical & Electronic;
Telecommunications
SC Engineering; Telecommunications
GA DR7XU
UT WOS:000380113800015
ER
PT J
AU Deng, H
Geng, Z
Himed, B
AF Deng, Hai
Geng, Zhe
Himed, Braham
TI MIMO Radar Waveform Design for Transmit Beamforming and Orthogonality
SO IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
LA English
DT Article
ID OPTIMIZATION; PERFORMANCE; ALGORITHMS; CLUTTER; SYSTEMS; TARGET
AB Coherent multiple-input multiple-output (MIMO) radar is capable of forming a specific transmit beam pattern favorable for radar operation, but the transmitted waveforms from different antenna elements need to be orthogonal for coherent beamforming. In this work, an innovative approach is developed for MIMO radar waveform design in space-time domain, rendering MIMO radar able to satisfy transmit beamforming constraint in space-domain as well as the waveform orthogonality requirement in time domain. The approach is validated through simulations.
C1 [Deng, Hai; Geng, Zhe] Florida Int Univ, Dept Elect & Comp Engn, 10555 W Flagler St, Miami, FL 33174 USA.
[Himed, Braham] Air Force Res Lab, RF Technol Branch, 2241 Avion Circle,Bldg 620, Wright Patterson AFB, OH 45433 USA.
RP Deng, H (reprint author), Florida Int Univ, Dept Elect & Comp Engn, 10555 W Flagler St, Miami, FL 33174 USA.
EM Hai.Deng@fiu.edu
OI Geng, Zhe/0000-0002-5440-3556
FU US AFRL through the Defense Engineering Corporation (DEC) [J020];
National Science Foundation (NSF) [AST-1443909]; FIU Presidential
Fellowship program
FX This work was supported by the US AFRL through the Defense Engineering
Corporation (DEC) under Contract J020 and the National Science
Foundation (NSF) under award AST-1443909. B. Himed was also supported by
the FIU Presidential Fellowship program.
NR 35
TC 0
Z9 0
U1 3
U2 4
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9251
EI 1557-9603
J9 IEEE T AERO ELEC SYS
JI IEEE Trans. Aerosp. Electron. Syst.
PD JUN
PY 2016
VL 52
IS 3
BP 1421
EP 1433
DI 10.1109/TAES.2016.140023
PG 13
WC Engineering, Aerospace; Engineering, Electrical & Electronic;
Telecommunications
SC Engineering; Telecommunications
GA DR7XU
UT WOS:000380113800035
ER
PT J
AU Cheng, CH
Liou, LL
Tsui, JB
Lin, DM
AF Cheng, Chi-Hao
Liou, Lihyeh L.
Tsui, James B.
Lin, David M.
TI Chirp Signal Detection Using FFT Peak Frequency Difference
SO IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
LA English
DT Article
ID LINEAR-FM SIGNALS; TRANSFORM
AB A new method was proposed for chirp signal detection and estimation built on the frame-based fast Fourier transform (FFT). The proposed method uses the peak frequency difference between FFT frames to detect a chirp signal and estimate chirp rate. This approach differs from conventional methods and is easy to implement. It generates more accurate chirp rate estimation especially under a low signal-to-noise ratio. Simulation and experimental data are used to verify the proposed methods.
C1 [Cheng, Chi-Hao] Miami Univ, 260 L Garland Hall, Oxford, OH 45056 USA.
[Liou, Lihyeh L.; Lin, David M.] US Air Force Res Lab, Bldg 620,2241 Avion Circle, Wright Patterson AFB, OH 45433 USA.
RP Cheng, CH (reprint author), Miami Univ, 260 L Garland Hall, Oxford, OH 45056 USA.
EM chengc@miamioh.edu; jamestsui456@gmail.com
NR 14
TC 0
Z9 0
U1 2
U2 2
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9251
EI 1557-9603
J9 IEEE T AERO ELEC SYS
JI IEEE Trans. Aerosp. Electron. Syst.
PD JUN
PY 2016
VL 52
IS 3
BP 1449
EP 1453
DI 10.1109/TAES.2016.140201
PG 5
WC Engineering, Aerospace; Engineering, Electrical & Electronic;
Telecommunications
SC Engineering; Telecommunications
GA DR7XU
UT WOS:000380113800037
ER
PT J
AU Rino, CL
Carrano, CS
Groves, KM
Roddy, PA
AF Rino, Charles L.
Carrano, Charles S.
Groves, Keith M.
Roddy, Patrick A.
TI A characterization of intermediate-scale spread F structure from
fouryears of high-resolution C/NOFS satellite data
SO RADIO SCIENCE
LA English
DT Article
DE ESF; power law spectra; ionosphere structure
ID PLASMA BUBBLES; IRREGULARITIES; SCINTILLATION
AB Power law spectra have been invoked to interpret equatorial scintillation data for decades. Published analyses of intensity and phase scintillation data typically report power law spectra of the form q(-p) with 2.4 < p < 2.6. However, in situ rocket and satellite measurements of equatorial spread F have shown evidence of spectra with two power law components. Strong scatter simulations and recent theoretical results have shown that two-component power law spectra can reconcile simultaneous equatorial scintillation observations from VHF to S-Band. The Communication/Navigation Outage Forecasting System (C/NOFS) satellite Planar Langmuir Probe generated a multiyear high-resolution sampling of equatorial spread F, but published analyses to date have reported only single-component power laws over scales from tens of kilometers to 70m. This paper summarizes the analysis of high-resolution C/NOFS data collected over the four year period 2011 to 2014. Following an earlier investigation of several months of C/NOFS data by the authors of this paper, the extended data set revealed a pattern of occurrence of two-component spectra in the most highly disturbed data sets. The results confirm a known inverse correlation between turbulent strength and spectral index. The new results are interpreted as an equatorial spread F life cycle pattern with two-component spectra in the early development phase giving way to single-component spectra in the decay phase.
C1 [Rino, Charles L.; Carrano, Charles S.; Groves, Keith M.] Boston Coll, Inst Sci Res, Boston, MA 02125 USA.
[Roddy, Patrick A.] Kirtland AFB, Air Force Res Lab, Albuquerque, NM USA.
RP Rino, CL (reprint author), Boston Coll, Inst Sci Res, Boston, MA 02125 USA.
EM crino@comcast.net
NR 23
TC 2
Z9 2
U1 1
U2 1
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0048-6604
EI 1944-799X
J9 RADIO SCI
JI Radio Sci.
PD JUN
PY 2016
VL 51
IS 6
BP 779
EP 788
DI 10.1002/2015RS005841
PG 10
WC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology &
Atmospheric Sciences; Remote Sensing; Telecommunications
SC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology &
Atmospheric Sciences; Remote Sensing; Telecommunications
GA DR5NC
UT WOS:000379948700019
ER
PT J
AU Imhof, E
Stickney, J
Squires, M
AF Imhof, Eric
Stickney, James
Squires, Matthew
TI A Wigner Function Approach to Coherence in a Talbot-Lau Interferometer
SO ATOMS
LA English
DT Article
DE trapped atom interferometry; Wigner function; Talbot-Lau interferometer;
coherence time
ID BROGLIE WAVE INTERFEROMETRY; TIME-DOMAIN; OPTICS
AB Using a thermal gas, we model the signal of a trapped interferometer. This interferometer uses two short laser pulses, separated by time T, which act as a phase grating for the matter waves. Near time , there is an echo in the cloud's density due to the Talbot-Lau effect. Our model uses the Wigner function approach and includes a weak residual harmonic trap. The analysis shows that the residual potential limits the interferometer's visibility, shifts the echo time of the interferometer, and alters its time dependence. Loss of visibility can be mitigated by optimizing the initial trap frequency just before the interferometer cycle begins.
C1 [Imhof, Eric; Stickney, James] Utah State Univ, Space Dynam Lab, Res Fdn, North Logan, UT 84341 USA.
[Squires, Matthew] US Air Force Res Lab, Albuquerque, NM 87117 USA.
RP Imhof, E (reprint author), Utah State Univ, Space Dynam Lab, Res Fdn, North Logan, UT 84341 USA.
EM eric.imhof@sdl.usu.edu; james.stickney@sdl.usu.edu;
Matthew.Squires@kirtland.af.mil
NR 20
TC 0
Z9 0
U1 5
U2 5
PU MDPI AG
PI BASEL
PA POSTFACH, CH-4005 BASEL, SWITZERLAND
SN 2218-2004
J9 ATOMS
JI Atoms
PD JUN
PY 2016
VL 4
IS 2
AR 18
DI 10.3390/atoms4020018
PG 11
WC Physics, Atomic, Molecular & Chemical
SC Physics
GA DR6GZ
UT WOS:000380001700007
ER
PT J
AU Blattner, CM
Crosby, MS
Goedken, M
Murase, JE
AF Blattner, Collin M.
Crosby, Matthew S.
Goedken, Michelle
Murase, Jenny E.
TI Update: Do probiotics prevent or treat pediatric atopic dermatitis?
SO PEDIATRIC ALLERGY AND IMMUNOLOGY
LA English
DT Letter
ID PLACEBO-CONTROLLED TRIAL; LACTOBACILLUS-RHAMNOSUS HN001; RANDOMIZED
CONTROLLED-TRIALS; DOUBLE-BLIND; ALLERGIC DISEASE; SKIN BARRIER; ECZEMA;
CHILDREN; AGE; METAANALYSIS
C1 [Blattner, Collin M.] Good Samaritan Reg Med Ctr, Dept Med, Corvallis, OR USA.
[Crosby, Matthew S.] Dept Flight Med, Med Grp 2, Barksdale Afb, LA USA.
[Goedken, Michelle] Affiliated Dermatol, Dept Dermatol, Phoenix, AZ USA.
[Murase, Jenny E.] Univ Calif San Francisco, Dept Dermatol, San Francisco, CA 94143 USA.
[Murase, Jenny E.] Palo Alto Fdn, Med Grp, Dept Dermatol, Mountain View, CA USA.
RP Murase, JE (reprint author), Univ Calif San Francisco, Dept Dermatol, San Francisco, CA 94143 USA.; Murase, JE (reprint author), Palo Alto Fdn, Med Grp, Dept Dermatol, Mountain View, CA USA.
EM jemurase@gmail.com
NR 23
TC 1
Z9 1
U1 7
U2 8
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0905-6157
EI 1399-3038
J9 PEDIAT ALLERG IMM-UK
JI Pediatr. Allergy Immunol.
PD JUN
PY 2016
VL 27
IS 4
BP 425
EP 428
DI 10.1111/pai.12539
PG 5
WC Allergy; Immunology; Pediatrics
SC Allergy; Immunology; Pediatrics
GA DR5FC
UT WOS:000379927700015
PM 26762816
ER
PT J
AU Canciani, A
Raquet, J
AF Canciani, Aaron
Raquet, John
TI Absolute Positioning Using the Earth's Magnetic Anomaly Field
SO NAVIGATION-JOURNAL OF THE INSTITUTE OF NAVIGATION
LA English
DT Article
ID NAVIGATION
AB Achieving worldwide dependable alternatives to the Global Positioning System is a challenging engineering problem. Current Global Positioning System alternatives often suffer from limitations such as where and when the systems can operate. Navigation using Earth's magnetic anomaly field, which is globally available at all times, shows promise to overcome many of these limitations. We present a navigation framework that uses Earth's magnetic anomaly field as a navigation signal to aid an inertial navigation system in an aircraft. The filter utilizes ultra-accurate optically pumped cesium magnetometers to make scalar intensity measurements of Earth's magnetic field and compare them with a map using a particle filter approach. The accuracy of these measurements allows observability of not only the inertial navigation system errors but also the temporal effects of Earth's magnetic field, which corrupt the navigation signal. These temporal effects are thoroughly analyzed, and we present a simple model that allows near worldwide use of the navigation filter. We analyze the dependencies on altitude and magnetic storm activity in a realistic simulation using data from test flights and magnetic observatories. Copyright (C) 2016 Institute of Navigation
C1 [Canciani, Aaron; Raquet, John] US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Canciani, A (reprint author), US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
NR 24
TC 0
Z9 0
U1 4
U2 5
PU WILEY PERIODICALS, INC
PI SAN FRANCISCO
PA ONE MONTGOMERY ST, SUITE 1200, SAN FRANCISCO, CA 94104 USA
SN 0028-1522
EI 2161-4296
J9 NAVIGATION-US
JI Navigation
PD SUM
PY 2016
VL 63
IS 2
BP 111
EP 126
DI 10.1002/navi.138
PG 16
WC Engineering, Aerospace; Remote Sensing; Telecommunications
SC Engineering; Remote Sensing; Telecommunications
GA DR2BS
UT WOS:000379710600001
ER
PT J
AU French, DM
Shiffler, D
AF French, David M.
Shiffler, Don
TI High power microwave source with a three dimensional printed
metamaterial slow-wave structure
SO REVIEW OF SCIENTIFIC INSTRUMENTS
LA English
DT Article
ID PERMITTIVITY; CATHODES
AB For over the last decade, the concept of metamaterials has led to new approaches for considering the interaction of radiation with complex structures. However, practical manifestations of such a device operating at high power densities have proven difficult to achieve due to the resonant nature of metamaterials and the resultant high electric fields, which place severe constraints on manufacturing the slow wave structures. In this paper, we describe the first experimental manifestation of a high power microwave device utilizing a metallic slow wave structure (metamaterial-like) fabricated using additive manufacturing. The feasibility of utilizing additive manufacturing as a technique for building these relatively complicated structures has thus been demonstrated. The MW class microwave source operates in the C-band and shows frequency tunablility with electron beam voltage. The basic electromagnetic characteristics of this device, the construction using additive manufacturing, and the basic performance as a microwave oscillator are considered. Due to the tunable nature of the device, it shows promise not only as an oscillator but also as a microwave amplifier. Therefore, the dispersive characteristics and a discussion of the anticipated gain is included as it relates to an amplifier configuration. Published by AIP Publishing.
C1 [French, David M.; Shiffler, Don] Air Force Res Lab, Directed Energy Directorate, Albuquerque, NM 87117 USA.
RP French, DM (reprint author), Air Force Res Lab, Directed Energy Directorate, Albuquerque, NM 87117 USA.
NR 22
TC 0
Z9 0
U1 9
U2 12
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0034-6748
EI 1089-7623
J9 REV SCI INSTRUM
JI Rev. Sci. Instrum.
PD JUN
PY 2016
VL 87
IS 5
AR 053308
DI 10.1063/1.4950904
PG 6
WC Instruments & Instrumentation; Physics, Applied
SC Instruments & Instrumentation; Physics
GA DQ4QE
UT WOS:000379187600050
PM 27250415
ER
PT J
AU Jensen, KL
Shiffler, DA
Harris, JR
Petillo, JJ
AF Jensen, Kevin L.
Shiffler, Donald A.
Harris, John R.
Petillo, John J.
TI Schottky's conjecture, field emitters, and the point charge model
SO AIP ADVANCES
LA English
DT Article
ID EMISSION CATHODES; COLD
AB A Point Charge Model of conical field emitters, in which the emitter is defined by an equipotential surface of judiciously placed charges over a planar conductor, is used to confirm Schottky's conjecture that field enhancement factors are multiplicative for a small protrusion placed on top of a larger base structure. Importantly, it is shown that Schottky's conjecture for conical /ellipsoidal field emitters remains unexpectedly valid even when the dimensions of the protrusion begin to approach the dimensions of the base structure. The model is analytic and therefore the methodology is extensible to other configurations. (C) 2016 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
C1 [Jensen, Kevin L.] Naval Res Lab, Code 6364, Washington, DC 20375 USA.
[Shiffler, Donald A.; Harris, John R.] Air Force Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA.
[Petillo, John J.] Leidos, Billerica, MA 01821 USA.
RP Jensen, KL (reprint author), Naval Res Lab, Code 6364, Washington, DC 20375 USA.
EM kevin.jensen@nrl.navy.mil
OI Jensen, Kevin/0000-0001-8644-1680
FU Air Force Office of Scientific Research (AFOSR)
FX We gratefully acknowledge financial support from the Air Force Office of
Scientific Research (AFOSR).
NR 24
TC 1
Z9 1
U1 1
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 2158-3226
J9 AIP ADV
JI AIP Adv.
PD JUN
PY 2016
VL 6
IS 6
AR 065005
DI 10.1063/1.4953813
PG 6
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Physics, Applied
SC Science & Technology - Other Topics; Materials Science; Physics
GA DQ2OG
UT WOS:000379041400005
ER
PT J
AU Lin, Z
Carvalho, BR
Kahn, E
Lv, RT
Rao, R
Terrones, H
Pimenta, MA
Terrones, M
AF Lin, Zhong
Carvalho, Bruno R.
Kahn, Ethan
Lv, Ruitao
Rao, Rahul
Terrones, Humberto
Pimenta, Marcos A.
Terrones, Mauricio
TI Defect engineering of two-dimensional transition metal dichalcogenides
SO 2D MATERIALS
LA English
DT Review
DE two-dimensional material; transition metal dichalcogenides; molybdenum
disulfide; defects; electronic properties
ID DER-WAALS HETEROSTRUCTURES; SINGLE-LAYER MOS2; HYDROGEN EVOLUTION
REACTION; MONOLAYER MOLYBDENUM-DISULFIDE; ACTIVE EDGE SITES;
RAMAN-SPECTROSCOPY; GRAIN-BOUNDARIES; ULTRATHIN NANOSHEETS;
VAPOR-DEPOSITION; WS2 MONOLAYERS
AB Two-dimensional transition metal dichalcogenides (TMDs), an emerging family of layered materials, have provided researchers a fertile ground for harvesting fundamental science and emergent applications. TMDs can contain a number of different structural defects in their crystal lattices which significantly alter their physico-chemical properties. Having structural defects can be either detrimental or beneficial, depending on the targeted application. Therefore, a comprehensive understanding of structural defects is required. Here we review different defects in semiconducting TMDs by summarizing: (i) the dimensionalities and atomic structures of defects; (ii) the pathways to generating structural defects during and after synthesis and, (iii) the effects of having defects on the physico-chemical properties and applications of TMDs. Thus far, significant progress has been made, although we are probably still witnessing the tip of the iceberg. A better understanding and control of defects is important in order to move forward the field of Defect Engineering in TMDs. Finally, we also provide our perspective on the challenges and opportunities in this emerging field.
C1 [Lin, Zhong; Carvalho, Bruno R.; Terrones, Mauricio] Penn State Univ, Dept Phys, 104 Davey Lab, University Pk, PA 16802 USA.
[Lin, Zhong; Carvalho, Bruno R.; Kahn, Ethan; Terrones, Mauricio] Penn State Univ, Ctr Dimens & Layered Mat 2, University Pk, PA 16802 USA.
[Carvalho, Bruno R.; Pimenta, Marcos A.] Univ Fed Minas Gerais, Dept Fis, BR-30123970 Belo Horizonte, MG, Brazil.
[Kahn, Ethan; Terrones, Mauricio] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA.
[Lv, Ruitao] Tsinghua Univ, Sch Mat Sci & Engn, Key Lab Adv Mat MOE, Beijing 100084, Peoples R China.
[Rao, Rahul] Air Force Res Lab, Mat & Mfg Directorate, RXAS, Wright Patterson AFB, OH 45433 USA.
[Rao, Rahul] UES Inc, Dayton, OH 45432 USA.
[Terrones, Humberto] Rensselaer Polytech Inst, Dept Phys Appl Phys & Astron, 110 Eighth St, Troy, NY 12180 USA.
[Terrones, Mauricio] Penn State Univ, Dept Chem, University Pk, PA 16802 USA.
[Terrones, Mauricio] Shinshu Univ, Inst Carbon Sci & Technol, 4-17-1 Wakasato, Nagano 3808553, Japan.
RP Terrones, M (reprint author), Penn State Univ, Dept Phys, 104 Davey Lab, University Pk, PA 16802 USA.; Terrones, M (reprint author), Penn State Univ, Ctr Dimens & Layered Mat 2, University Pk, PA 16802 USA.; Terrones, M (reprint author), Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA.; Terrones, M (reprint author), Penn State Univ, Dept Chem, University Pk, PA 16802 USA.; Terrones, M (reprint author), Shinshu Univ, Inst Carbon Sci & Technol, 4-17-1 Wakasato, Nagano 3808553, Japan.
EM mut11@psu.edu
RI Carvalho, Bruno/C-6275-2015
FU US Army Research Office MURI [W911NF-11-1-0362]; Air Force Office of
Scientific Research MURI [FA9550-12-1-0471]; Materials Simulation Center
of the Materials Research Institute; Research Computing and
Cyberinfrastructure unit of Information Technology Services; Penn State
Center for Nanoscale Science; Penn State Center for Nanoscale Science
[DMR-0820404, DMR-1420620]; FAPEMIG; CNPq; CAPES; Brazilian Institute of
Science and Technology (INCT) in Carbon Nanomaterials; National Natural
Science Foundation of China [51372131, 51232005]; 973 program of China
[2014CB932401, 2015CB932500]; National Science Foundation
[2DARE-EFRI-1433311, 2DARE-EFRI-1542707]; Air Force Office of Scientific
Research
FX This work was supported by the US Army Research Office MURI grant
W911NF-11-1-0362, the Air Force Office of Scientific Research MURI grant
FA9550-12-1-0471, by the Materials Simulation Center of the Materials
Research Institute, the Research Computing and Cyberinfrastructure unit
of Information Technology Services and Penn State Center for Nanoscale
Science. MT acknowledges support from the Penn State Center for
Nanoscale Science (DMR-0820404 and DMR-1420620). The authors acknowledge
the Center for 2-Dimensional and Layered Materials at the Pennsylvania
State University. BRC and MAP acknowledge the financial support of
Brazilian agencies FAPEMIG, CNPq and CAPES, and the Brazilian Institute
of Science and Technology (INCT) in Carbon Nanomaterials. RL
acknowledges the support from the National Natural Science Foundation of
China (Grant No. 51372131, 51232005) and 973 program of China (No.
2014CB932401, 2015CB932500). HT and MT acknowledge the financial support
from the National Science Foundation (2DARE-EFRI-1433311 &
2DARE-EFRI-1542707). RR acknowledges funding from the Air Force Office
of Scientific Research.
NR 176
TC 4
Z9 4
U1 111
U2 176
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 2053-1583
J9 2D MATER
JI 2D Mater.
PD JUN
PY 2016
VL 3
IS 2
AR 022002
DI 10.1088/2053-1583/3/2/022002
PG 21
WC Materials Science, Multidisciplinary
SC Materials Science
GA DP5XL
UT WOS:000378571400013
ER
PT J
AU Cao, YC
Ren, W
Casbeer, DW
Schumacher, C
AF Cao, Yongcan
Ren, Wei
Casbeer, David W.
Schumacher, Corey
TI Finite-Time Connectivity-Preserving Consensus of Networked Nonlinear
Agents With Unknown Lipschitz Terms
SO IEEE TRANSACTIONS ON AUTOMATIC CONTROL
LA English
DT Article
DE Consensus; cooperative control; limited sensing range; Lipschitz
nonlinear dynamics
ID SYSTEMS; MANIPULATORS; COORDINATION
AB This technical note studies finite-time consensus problem for a team of networked nonlinear agents with unknown Lipschitz terms under communication constraints, where each agent has a limited sensing range. Because the induced interaction graph is typically state-dependent and dynamic, we propose a distributed nonlinear consensus algorithm that is capable of preserving the initial interaction patterns. By using tools from nonsmooth analysis, sufficient conditions are obtained such that finite-time consensus can be reached. An upper bound of the convergence time is derived via a two-step analysis. The validity of the theoretical result is shown by one simulation example.
C1 [Cao, Yongcan] Univ Texas San Antonio, Dept Elect & Comp Engn, San Antonio, TX 78249 USA.
[Ren, Wei] Univ Calif Riverside, Dept Elect & Comp Engn, Riverside, CA 92521 USA.
[Casbeer, David W.; Schumacher, Corey] Air Force Res Lab, Control Sci Ctr Excellence, Wright Patterson AFB, OH 45433 USA.
RP Cao, YC (reprint author), Univ Texas San Antonio, Dept Elect & Comp Engn, San Antonio, TX 78249 USA.
RI Ren, Wei/G-7369-2011;
OI Ren, Wei/0000-0002-2818-9752; Cao, Yongcan/0000-0003-3383-0185
FU National Science Foundation [ECCS-1307678]
FX This work was supported in part by the National Science Foundation under
Grant ECCS-1307678. Approved for public release; distributed unlimited,
88ABW-2012-4856. This paper was presented in part at the 2013 American
Control Conference, Washington, DC, June 2013. Recommended by Associate
Editor S. Zampieri.
NR 23
TC 1
Z9 1
U1 4
U2 8
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9286
EI 1558-2523
J9 IEEE T AUTOMAT CONTR
JI IEEE Trans. Autom. Control
PD JUN
PY 2016
VL 61
IS 6
BP 1700
EP 1705
DI 10.1109/TAC.2015.2479926
PG 6
WC Automation & Control Systems; Engineering, Electrical & Electronic
SC Automation & Control Systems; Engineering
GA DP3WG
UT WOS:000378426000032
ER
PT J
AU Raimondi, CJ
Jessup, JP
Ashcraft-Olmscheid, D
Vandewalle, KS
AF Raimondi, Christopher J.
Jessup, Jeffrey P.
Ashcraft-Olmscheid, Deborah
Vandewalle, Kraig S.
TI Bond strength of resin cements to dentin using universal bonding agents
SO AMERICAN JOURNAL OF DENTISTRY
LA English
DT Article
ID SIMPLIFIED-STEP ADHESIVES; DUAL-CURED COMPOSITES; SELF-ETCHING ADHESIVE;
LUTING CEMENT; CURING MODE; INCOMPATIBILITY; COMPATIBILITY; PERFORMANCE;
MONOMERS
AB Purpose: To determine the effect of new universal bonding agents on the bond strength of dual-cure resin cements to dentin. Methods: 140 extracted human third molars were mounted in dental stone and sectioned with a saw to remove coronal tooth structure. The teeth were randomly divided into seven groups of 20, based on the use of five universal bonding agents (All-Bond Universal; FuturaBond U; Prime&Bond Elect; Scotchbond Universal; Clearfil Universal) compared to two self-etch bonding agents (Clearfil SE Bond and Clearfil SE Bond 2). Each group was further divided into two equal subgroups of 10 specimens each with each subgroup tested with either self-or light-cure activation of the dual-cure resin cement (Calibra). The bonding agent was applied per manufacturers' instructions to the dentin surface of each specimen. The specimens were placed into a jig and resin cement was inserted into the mold to a height of 3-4 mm and light cured. Specimens were stored for 24 hours in 37 degrees C distilled water and tested in shear in a universal testing machine. A mean shear bond strength value (MPa) and standard deviation was determined per group. Results: Except for Clearfil Universal, the new simplified universal bonding agents resulted in significantly lower shear bond strength of the resin cement to dentin than the two-step, self-etching bonding agents Clearfil SE Bond or Clearfil SE Bond 2.
C1 [Vandewalle, Kraig S.] Joint Base San Antonio Lackland, Dent Res, 1615 Truemper St, Lackland AFB, TX 78236 USA.
[Raimondi, Christopher J.] Joint Base Anacostia Bolling, Adv Educ Gen Dent Residency AEGD 1, Washington, DC USA.
[Jessup, Jeffrey P.] Operat Dent AEGD 2, Washington, DC USA.
[Ashcraft-Olmscheid, Deborah] AEGD 2, Prosthodont Educ & Training, Washington, DC USA.
RP Vandewalle, KS (reprint author), Joint Base San Antonio Lackland, Dent Res, 1615 Truemper St, Lackland AFB, TX 78236 USA.
EM kraig.vandewalle.3@us.af.mil
FU 59th Clinical Research Training Division, Joint Base San Antonio -
Lackland, Texas, USA
FX The authors declared no conflict of interest. From the Advanced
Education in General Dentistry Residency Program (AEGD-2), Air Force
Postgraduate Dental School (AFPDS), Joint Base San Antonio Lackland,
Texas, USA, and Uniformed Services University of the Health Sciences,
Bethesda, Maryland, USA. Funding for the study was provided by the 59th
Clinical Research Training Division, Joint Base San Antonio - Lackland,
Texas, USA.
NR 20
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U1 2
U2 2
PU MOSHER & LINDER, INC
PI WESTON
PA 318 INDIAN TRACE SUITE 500, WESTON, FL 33326 USA
SN 0894-8275
J9 AM J DENT
JI Am. J. Dent.
PD JUN
PY 2016
VL 29
IS 3
BP 175
EP 179
PG 5
WC Dentistry, Oral Surgery & Medicine
SC Dentistry, Oral Surgery & Medicine
GA DP4JX
UT WOS:000378463300011
PM 27505996
ER
PT J
AU Huang, GY
Tian, LM
Liu, KK
Hu, B
Xu, F
Lu, TJ
Naik, RR
Singamaneni, S
AF Huang, Guoyou
Tian, Limei
Liu, Keng-Ku
Hu, Bo
Xu, Feng
Lu, Tian Jian
Naik, Rajesh R.
Singamaneni, Srikanth
TI Elastoplastic Deformation of Silk Micro- and Nanostructures
SO ACS BIOMATERIALS SCIENCE & ENGINEERING
LA English
DT Article
DE silk; micro- and nanostructures; template-assisted; secondary structure;
micro-Raman spectroscopy
ID BOMBYX-MORI SILK; FIBROIN FILMS; SPIDER SILK; RAMAN MICROSPECTROSCOPY;
PROTEIN CONFORMATION; BIOMATERIALS; ORIENTATION; TRANSITION; STRENGTH;
DESIGN
AB Excellent mechanical strength, programmable biodegradation, optical transparency, and extremely low surface roughness of reconstituted silk micro- and nanostructures makes them highly attractive for 'la broad range of applications in biophotonics, bioresorbable electronics, and targeted drug delivery. The mechanical behavior of reconstituted silk structures at micro- and nanometer length scales is not well understood because of the challenges associated with testing of silk structures at these length scalesiln this study, we demonstrate the fabrication of low-dimensional patterned silk films and silk micro- and nanopillars and their transfer to stretchable substrate's. The silk micro and nanostructures exhibited extremely high ductility with large local deformation (up to 230% local strain) and the extent of local deformation before failure was found to be secondary structure-dependent. The successful transfer of the patterned silk films to stretchable, substrates without the use of any organic solvent enabled us to probe the changes in the secondary structure of silk micro- and nanostructures upon mechanical deformation. Our results provide novel insight into the structure function relationship of silk materials, and hold promise for applications in tissue engineering, controlled drug delivery, and electronic and optical devices.
C1 [Huang, Guoyou; Tian, Limei; Liu, Keng-Ku; Hu, Bo; Singamaneni, Srikanth] Washington Univ, Dept Mech Engn & Mat Sci, St Louis, MO 63130 USA.
[Huang, Guoyou; Tian, Limei; Liu, Keng-Ku; Hu, Bo; Singamaneni, Srikanth] Washington Univ, Inst Mat Sci & Engn, St Louis, MO 63130 USA.
[Huang, Guoyou; Xu, Feng; Lu, Tian Jian] Xi An Jiao Tong Univ, MOE Key Lab Biomed Informat Engn, Sch Life Sci & Technol, Xian 710049, Peoples R China.
[Huang, Guoyou; Xu, Feng; Lu, Tian Jian] Xi An Jiao Tong Univ, BEBC, Xian 710049, Peoples R China.
[Naik, Rajesh R.] Soft Matter Mat Branch, Mat & Mfg Directorate, Wright Patterson Air Force Base, Dayton, OH 45433 USA.
[Naik, Rajesh R.] 711 Human Performance Wing, Dayton, OH 45433 USA.
RP Singamaneni, S (reprint author), Washington Univ, Dept Mech Engn & Mat Sci, St Louis, MO 63130 USA.; Singamaneni, S (reprint author), Washington Univ, Inst Mat Sci & Engn, St Louis, MO 63130 USA.
EM singamaneni@wustl.edu
RI Lu, Tian Jian/E-6063-2016
FU Air Force Office of Scientific Research [FA9550-15-1-0228, 12RX11COR];
AFRL/RX; International Science and Technology Cooperation Program of
China [2013DFG02930]; China Postdoctoral Science Foundation
[2013M540742]
FX We acknowledge support from Air Force Office of Scientific Research
(S.S., Award FA9550-15-1-0228; and R.R.N., 12RX11COR) and AFRL/RX. This
work was supported by the International Science and Technology
Cooperation Program of China (2013DFG02930) and the China Postdoctoral
Science Foundation (2013M540742). The authors thank the Nano Research
Facility (NRF) at Washington University for providing access to electron
microscopy facilities.
NR 38
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U2 26
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 2373-9878
J9 ACS BIOMATER SCI ENG
JI ACS Biomater. Sci. Eng.
PD JUN
PY 2016
VL 2
IS 6
BP 893
EP 899
DI 10.1021/acsbiomaterials.6b00177
PG 7
WC Materials Science, Biomaterials
SC Materials Science
GA DO6WX
UT WOS:000377925300002
ER
PT J
AU Oshima, Y
Ahmadi, E
Badescu, SC
Wu, F
Speck, JS
AF Oshima, Yuichi
Ahmadi, Elaheh
Badescu, Stefan C.
Wu, Feng
Speck, James S.
TI Composition determination of beta-(AlxGa1-x)(2)O-3 layers coherently
grown on (010) beta-Ga2O3 substrates by high-resolution X-ray
diffraction
SO APPLIED PHYSICS EXPRESS
LA English
DT Article
AB We demonstrate X-ray-diffraction-based composition estimation of beta-(AlxGa1-x)(2)O-3 coherently grown on (010) beta-Ga2O3. The relation between the strain along the [010] direction and the Al composition of the beta-(AlxGa1-x)(2)O-3 layer was formulated using the stress-strain relationship in the monoclinic system. This formulation allows us to estimate the Al composition using the out-of-plane lattice spacing determined by conventional X-ray omega-2 theta. measurements. This method was applied to molecular-beam-epitaxy-grown coherent beta-(AlxGa1-x)(2)O-3/Ga2O3 heterostructures, and the Al composition in beta-(AlxGa1-x)(2)O-3 agrees closely with the composition determined directly by atom probe tomography. (C) 2016 The Japan Society of Applied Physics
C1 [Oshima, Yuichi; Ahmadi, Elaheh; Wu, Feng; Speck, James S.] Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA.
[Badescu, Stefan C.] Sensors Directorate, Wright Patterson Air Force Base, Dayton, OH 45433 USA.
RP Oshima, Y (reprint author), Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA.
EM yuichi@engineering.ucsb.edu
FU Air Force Office of Scientific Research (AFOSR) [FA9550-14-1-0112];
MRSEC Program of the U.S. National Science Foundation [DMR-1121053]
FX This work was supported by the Air Force Office of Scientific Research
(AFOSR, Program Manager Dr. Ali Sayir) through Grant Number
FA9550-14-1-0112. Additional support for J.S.S. was provided by the
MRSEC Program of the U.S. National Science Foundation under Award Number
DMR-1121053.
NR 19
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U1 7
U2 16
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 1882-0778
EI 1882-0786
J9 APPL PHYS EXPRESS
JI Appl. Phys. Express
PD JUN
PY 2016
VL 9
IS 6
AR 061102
DI 10.7567/APEX.9.061102
PG 3
WC Physics, Applied
SC Physics
GA DO5AK
UT WOS:000377795800006
ER
PT J
AU Wiens, JP
Miller, TM
Shuman, NS
Ard, SG
Viggiano, AA
AF Wiens, Justin P.
Miller, Thomas M.
Shuman, Nicholas S.
Ard, Shaun G.
Viggiano, Albert A.
TI Time-of-flight detection coupled to a flowing afterglow: Improvements
and characterization
SO INTERNATIONAL JOURNAL OF MASS SPECTROMETRY
LA English
DT Article
DE Mass spectrometry; Time-of-flight; Flowing afterglow; Ions; Plasma
ID ION MUTUAL NEUTRALIZATION; ELECTRON-ATTACHMENT; LANGMUIR-PROBE; FALP
TECHNIQUE; COEFFICIENTS; APPARATUS; RADICALS; KINETICS; PLASMAS; 200-K
AB An orthogonally accelerated time-of-flight mass spectrometer has been added to a flowing afterglow-Langmuir probe apparatus, coupled by a rectilinear ion guide. The TOF has improved the signal-to-noise (S/N) ratio by about an order of magnitude over a quadrupole mass filter/electron multiplier detection typical for flow tube instruments of this type and used previously. The improved S/N reduces our data acquisition time commensurately. Additionally, mass discrimination is low enough that it is minimal for ions heavier than similar to 10 amu. The lack of mass discrimination not only reduces experiment time but also leads to greater accuracy in the measurement of reaction rate coefficients. Finally, simultaneous detection of both heavy and light ions is improved. H+ can now be detected and WF5+ isotopes can be separated without reducing sensitivity. We have found that discrimination against low-mass ions can occur when certain electron-attaching reactants are used (e.g. SF6), and possibly due to radicals formed after certain other reactants attach electrons. Evidence points to adsorption of these species on surfaces of the ion guide immediately behind the flowing afterglow sampling orifice, which separates the flow tube and TOF region. The adsorption follows a Langmuir isotherm profile and is greatly reduced by heating the gas in the flow tube. Published by Elsevier B.V.
C1 [Wiens, Justin P.; Miller, Thomas M.; Shuman, Nicholas S.; Ard, Shaun G.; Viggiano, Albert A.] US Air Force, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
RP Viggiano, AA (reprint author), US Air Force, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
EM justin.wiens.1.ctr@us.af.mil
FU Air Force Office of Scientific Research [AFOSR-2303EP]; National
Research Council Research Associateship Program; Institute for
Scientific Research of Boston College [FA9453-10-C-0206]
FX The work was supported by the Air Force Office of Scientific Research
(No. AFOSR-2303EP). J.P.W. is supported by the National Research Council
Research Associateship Program. T.M.M. and S.G.A. acknowledge the
support from the Institute for Scientific Research of Boston College
under Contract No. FA9453-10-C-0206. The authors would like to thank
Bruce Kay and Rainer Johnsen for helpful discussions.
NR 30
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PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1387-3806
EI 1873-2798
J9 INT J MASS SPECTROM
JI Int. J. Mass Spectrom.
PD JUN 1
PY 2016
VL 403
BP 27
EP 31
DI 10.1016/j.ijms.2016.03.003
PG 5
WC Physics, Atomic, Molecular & Chemical; Spectroscopy
SC Physics; Spectroscopy
GA DO4EM
UT WOS:000377734600004
ER
PT J
AU Streib, E
Blake, D
Christmas, AB
Clancy, K
Cocanour, C
Cooper, C
Driscoll, RP
Eastman, AL
Ekeh, AP
Gonzalez, R
Hinsdale, JG
Joseph, K
Kuhls, DA
Thomas, SG
Cooper, Z
AF Streib, Erik
Blake, David
Christmas, A. Britton
Clancy, Keith
Cocanour, Christine
Cooper, Carnell
Driscoll, Robert P.
Eastman, Alexander L.
Ekeh, Akpofure Peter
Gonzalez, Richard
Hinsdale, James G.
Joseph, Kimberly
Kuhls, Deborah A.
Thomas, Scott G.
Cooper, Zara
CA AAST Prevention Comm
TI American Association for the Surgery of Trauma statement on firearm
injuries
SO JOURNAL OF TRAUMA AND ACUTE CARE SURGERY
LA English
DT Editorial Material
C1 [Streib, Erik] Indiana Univ Sch Med, Indianapolis, IN 46202 USA.
[Blake, David] US Air Force, Norfolk, VA USA.
[Christmas, A. Britton] Carolinas Med Ctr, Charlotte, NC 28203 USA.
[Clancy, Keith] Case Western Reserve Univ, Sch Med, UH Case Med Ctr, Beachwood, OH USA.
[Cooper, Carnell] Univ Calif Davis, Med Ctr, Sacramento, CA USA.
[Driscoll, Robert P.] Brigham & Womens Hosp, South Shore Hosp, Hingham, MA USA.
[Eastman, Alexander L.] UT Southwestern Med Ctr, Dallas, TX USA.
[Ekeh, Akpofure Peter] Wright State Univ, Miami Valley Hosp, Dayton, OH 45435 USA.
[Gonzalez, Richard] Loyola Univ, Med Ctr, 2160 S 1st Ave, Maywood, IL 60153 USA.
[Hinsdale, James G.] Good Samaritan Hosp, San Jose, CA USA.
[Joseph, Kimberly] JHS Cook Cty Hosp, Chicago, IL USA.
[Kuhls, Deborah A.] Univ Nevada, Sch Med, Las Vegas, NV 89154 USA.
[Thomas, Scott G.] Beacon Trauma & Surg Serv, South Bend, IN USA.
[Cooper, Zara] Brigham & Womens Hosp, Ctr Surg & Publ Hlth, One Brigham Circle,1620 Tremont St,4-020, Boston, MA 02120 USA.
RP Cooper, Z (reprint author), Brigham & Womens Hosp, Ctr Surg & Publ Hlth, One Brigham Circle,1620 Tremont St,4-020, Boston, MA 02120 USA.
EM zcooper@partners.org
NR 0
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U1 0
U2 2
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA TWO COMMERCE SQ, 2001 MARKET ST, PHILADELPHIA, PA 19103 USA
SN 2163-0755
EI 2163-0763
J9 J TRAUMA ACUTE CARE
JI J. Trauma Acute Care Surg.
PD JUN
PY 2016
VL 80
IS 6
BP 849
EP 849
DI 10.1097/TA.0000000000001090
PG 1
WC Critical Care Medicine; Surgery
SC General & Internal Medicine; Surgery
GA DO5MX
UT WOS:000377828300002
PM 27116407
ER
PT J
AU Carter, CD
Hammack, S
Lee, T
AF Carter, Campbell D.
Hammack, Stephen
Lee, Tonghun
TI High-speed flamefront imaging in premixed turbulent flames using planar
laser-induced fluorescence of the CH C-X band
SO COMBUSTION AND FLAME
LA English
DT Article
DE kHz diagnostics; CH PLIF; Turbulent combustion
ID JET FLAMES; REPETITION-RATE; METHANE FLAMES; PLIF; OH; TEMPERATURE;
TRANSITION; SYSTEM; RATES
AB We describe efforts to develop kHz-rate or high-speed planar laser-induced fluorescence (PLIF) of the CH radical for application to premixed flames. The basic approach used here involves excitation and detection of the CH radial via the C-2 Sigma(+)-X-2 Pi (v' = 0, v '' = 0) band, which has transitions in the wavelength range lambda approximate to 310-320 nm. Transitions in this band are generally stronger than those in the A-X and B-X bands of CH and the radiative lifetimes are shorter too. Thus, the C-X band should have advantages with regard to CH detectability in atmospheric flames, and we show that good CH-PLIF signal-to-noise and signal to-background ratios can be attained at a 10-kHz interrogation rate and that the spatial resolution (of the CH layer) is reasonably good as well. Of course, strong OH lines, from the A(2)Sigma(+)-X-2 Pi (0,0) and (1,1) bands, lie nearby the CH C-X lines. While this can create some interference in the detection of CH, we demonstrate that OH lines can be avoided, if desired, or excited, if desired. Indeed, easy access to either CH or OH is a substantial benefit of the method outlined herein. Furthermore, we show that simultaneous imaging of CH and OH-using a single laser system and camera-is possible too. We demonstrate the utility of this approach for resolving the flamefront dynamics with 10-kHz measurements in a turbulent, premixed methane-air Bunsen flame: we see intrusion of flame and products into the reactant-zone, which appears to accelerate the consumption of the reactant core, and fingers of flame and reactants that extend into the product-zone and then pinch off and burn out. Published by Elsevier Inc. on behalf of The Combustion Institute.
C1 [Carter, Campbell D.] US Air Force, Res Lab, AFRL RQHF, 1950 Fifth St, Wright Patterson AFB, OH 45433 USA.
[Hammack, Stephen; Lee, Tonghun] Univ Illinois, Dept Mech Sci & Engn, Urbana, IL 61801 USA.
[Hammack, Stephen] Aerosp Syst Directorate, 1950 Fifth St, Wright Patterson AFB, OH 45433 USA.
RP Carter, CD (reprint author), US Air Force, Res Lab, AFRL RQHF, 1950 Fifth St, Wright Patterson AFB, OH 45433 USA.
EM Campbell.carter@us.af.mil
FU U.S. Air Force Research Laboratory; Aerospace Systems Directorate
(AFRL/RQ); Air Force Office of Scientific Research (AFOSR); AFOSR grant
[FA9550-14-1-0343]
FX This work was supported by the U.S. Air Force Research Laboratory,
Aerospace Systems Directorate (AFRL/RQ), and the Air Force Office of
Scientific Research (AFOSR). University of Illinois contributions were
funded through AFOSR grant FA9550-14-1-0343. In addition, we wish to
thank the following people: Dr. Andrei Lipatnikov (Chalmers) for
valuable input regarding premixed turbulent flame dynamics; Mr. Aaron
Skiba and Mr. Timothy Wabel (University of Michigan) for stimulating
discussions regarding flamefront markers; Prof. James Driscoll
(University of Michigan) for the loan of the 2D Bunsen burner; and Prof.
Adam Steinberg (University of Toronto) for advice in the burner setup.
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PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0010-2180
EI 1556-2921
J9 COMBUST FLAME
JI Combust. Flame
PD JUN
PY 2016
VL 168
BP 66
EP 74
DI 10.1016/j.combustflame.2016.03.024
PG 9
WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary;
Engineering, Chemical; Engineering, Mechanical
SC Thermodynamics; Energy & Fuels; Engineering
GA DN5YZ
UT WOS:000377148900007
ER
PT J
AU Richardson, DR
Jiang, NB
Blunck, DL
Gord, JR
Roy, S
AF Richardson, Daniel R.
Jiang, Naibo
Blunck, David L.
Gord, James R.
Roy, Sukesh
TI Characterization of inverse diffusion flames in vitiated cross flows via
two-photon planar laser-induced fluorescence of CO and 2-D thermometry
SO COMBUSTION AND FLAME
LA English
DT Article
DE Laser diagnostics; Two-photon CO-PLIF; Film cooling; Inverse diffusion
flames
ID WELL-STIRRED REACTOR; COMBUSTION GASES; CARBON-MONOXIDE; ELEVATED
PRESSURE; HIGH-TEMPERATURE; OH FLUORESCENCE; MODEL COMBUSTOR; N-HEPTANE;
JET; OXIDATION
AB Two-photon, planar laser-induced fluorescence (PLIF) of carbon-monoxide (CO) and two-dimensional thermometry employing two-color, hydroxyl radical (OH) PLIF are used to characterize atmospheric pressure inverse diffusion flames. These flames are important tools to aid the understanding of secondary reaction zones that may form in gas turbine engines when film-cooling air reacts with fuel-rich packets from the combustor. For the experiments performed in the present study, exhaust from a propane-air well-stirred reactor is channeled to a test section where three different film-cooling geometries are used to create inverse diffusion flames: (1) a single row of normal cooling holes, (2) a slot cut at an angle of 30 with respect to the wall, and (3) an 5 x 11 array of cooling holes. It is found that CO and H-2 concentrations of a few percent can lead to secondary reaction zones and that different cooling-hole geometries can produce dramatically different secondary reaction-zone shapes. These secondary reaction zone flames have Damkohler numbers greater than unity and are diffusion limited. The PLIF measurements show regions where CO is consumed, OH produced, and the temperature perturbed. For film-cooling flows that remain attached to the wall, the secondary reaction zone is also close to the wall and can cover a relatively long axial length. For film-cooling flows that separate from the wall, the secondary reaction zones protrude farther into the cross flow then quickly mix with the cross flow. By comparing the CO, OH, and temperature fields, three characteristic regions of flows with secondary reaction zones are identified: the injection region where cooling air displaces the vitiated cross flow, the secondary reaction zone region, and the mix-out region where all of the oxygen has been consumed and mixing with the vitiated cross flow controls the local composition and temperature. (C) 2016 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
C1 [Richardson, Daniel R.; Jiang, Naibo; Roy, Sukesh] Spectral Energies LLC, 5100 Springfield St,Suite 301, Dayton, OH 45431 USA.
[Blunck, David L.; Gord, James R.] Air Force Res Lab, Wright Patterson AFB, OH USA.
[Blunck, David L.] Oregon State Univ, Sch Mech Ind & Mfg Engn, Corvallis, OR 97331 USA.
RP Roy, S (reprint author), Spectral Energies LLC, 5100 Springfield St,Suite 301, Dayton, OH 45431 USA.; Gord, JR (reprint author), Air Force Res Lab, Wright Patterson AFB, OH USA.
EM james.gord@us.af.mil; sroy@woh.rr.com
FU Air Force Research Laboratory [FA8650-12-C-2236, FA8650-15-D-2518]; Air
Force Office of Scientific Research [14RQ06COR]
FX The authors express their gratitude to Dr. Scott Stauffer of University
of Dayton Research Institute for stimulating scientific discussions and
technical assistance. The authors would like to thank Richard Zehring of
Innovative Scientific Solutions, Inc. for his excellent assistance with
the combustion facility. This work was funded by the Air Force Research
Laboratory contract nos. FA8650-12-C-2236 and FA8650-15-D-2518 and by
the Air Force Office of Scientific Research (14RQ06COR) (Dr. Chiping Li,
Program Officer). This work was cleared for public release
(88ABW-2015-4424).
NR 83
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U1 12
U2 16
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0010-2180
EI 1556-2921
J9 COMBUST FLAME
JI Combust. Flame
PD JUN
PY 2016
VL 168
BP 270
EP 285
DI 10.1016/j.combustflame.2016.03.005
PG 16
WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary;
Engineering, Chemical; Engineering, Mechanical
SC Thermodynamics; Energy & Fuels; Engineering
GA DN5YZ
UT WOS:000377148900022
ER
PT J
AU Chang, WM
Ding, KH
Tsang, L
Xu, XL
AF Chang, Wenmo
Ding, Kung-Hau
Tsang, Leung
Xu, Xiaolan
TI Microwave Scattering and Medium Characterization for Terrestrial Snow
With QCA-Mie and Bicontinuous Models: Comparison Studies
SO IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
LA English
DT Article
DE Bicontinuous model; microwave remote sensing; quasi-crystalline
approximation (QCA) model; terrestrial snow
ID EMISSION MODEL; ELECTROMAGNETIC SCATTERING; LAYERED SNOWPACKS; WATER
EQUIVALENT; GRAIN-SIZE; SPHERES; ICE
AB Comparison studies are made between the QCA-Mie model and the bicontinuous model in microwave scattering from terrestrial snow. Both the scattering properties and the medium characterization are compared. For QCA, we use the multisize and the sticky particle models. For the bicontinuous model, we use the probability distribution function for the wavenumber. We compare the scattering rate and the angular distribution of scattering using the mean cosine of scattering and show that the two models have similar properties. In medium characterization, we use the pair distribution functions used in QCA to derive the correlation functions. We show that both the Percus-Yevick pair functions and the bicontinuous model have tails in the correlation functions that are distinctly different from the traditional exponential correlation functions. The methodologies of using ground measurements of grain size distributions and correlation functions to obtain model parameters are addressed.
C1 [Chang, Wenmo] Univ Washington, Dept Elect Engn, Seattle, WA 98105 USA.
[Ding, Kung-Hau] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Tsang, Leung] Univ Michigan, Dept Elect Engn & Comp Sci, Ann Arbor, MI 48109 USA.
[Xu, Xiaolan] CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
RP Chang, WM (reprint author), Univ Washington, Dept Elect Engn, Seattle, WA 98105 USA.
EM wmchang@uw.edu
FU National Aeronautics and Space Administration (NASA) Terrestrial
Hydrology Program [NNX15AU15G]; NASA Instrument Incubator Program
"Enhancement, Demonstration, and Validation of the Wideband Instrument
for Snow Measurements," by the NASA Remote Sensing Theory Program
[NNX15AI13G]; National Science Foundation Polar Science Division
[1503917]
FX This work was supported in part by the National Aeronautics and Space
Administration (NASA) Terrestrial Hydrology Program under Grant
NNX15AU15G, by the NASA Instrument Incubator Program "Enhancement,
Demonstration, and Validation of the Wideband Instrument for Snow
Measurements," by the NASA Remote Sensing Theory Program under Grant
NNX15AI13G, and by the National Science Foundation Polar Science
Division under Grant 1503917.
NR 31
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PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0196-2892
EI 1558-0644
J9 IEEE T GEOSCI REMOTE
JI IEEE Trans. Geosci. Remote Sensing
PD JUN
PY 2016
VL 54
IS 6
BP 3637
EP 3648
DI 10.1109/TGRS.2016.2522438
PG 12
WC Geochemistry & Geophysics; Engineering, Electrical & Electronic; Remote
Sensing; Imaging Science & Photographic Technology
SC Geochemistry & Geophysics; Engineering; Remote Sensing; Imaging Science
& Photographic Technology
GA DO0OB
UT WOS:000377477100042
ER
PT J
AU Hart, A
Sytsma, M
Ukeiley, L
AF Hart, Adam
Sytsma, Michael
Ukeiley, Lawrence
TI An aerodynamic characterization facility for micro air vehicle research
SO INTERNATIONAL JOURNAL OF MICRO AIR VEHICLES
LA English
DT Article
DE Low Reynolds number; atmospheric turbulence; micro air vehicle; wind
tunnel
ID PASSIVE SCALAR; WIND-TUNNEL; TURBULENCE; STATISTICS
AB The Aerodynamic Characterization Facility is a unique facility located at the University of Florida's Research and Engineering Education Facility designed with the intent to study complex low Reynolds number, unsteady aerodynamic phenomena. This facility includes an open jet, open return wind tunnel specifically designed to operate in the low Reynolds number regime where current research efforts are being tasked for Micro Air Vehicle flight platforms. Specifically, the wind tunnel operates with freestream velocities ranging from nominally 0 to 22 m/s with 0.1 m/s resolution provided by a variable frequency drive utilized to control the tunnel. The test section entrance is 1.07 m(2) with a length of 4.6 m. Flow uniformity investigations at free stream velocities of 2 and 4 m/s demonstrate a uniform flow core throughout the test section of at least 50% of the 1.14 m(2) contraction exit. Hot wire anemometry investigations present turbulence intensities less than 0.22% for free stream velocities greater than 1 m/s. The facility is also equipped with a dynamic motion rig and active turbulence generator. The dynamic motion rig is utilized to investigate unsteady aerodynamics over dynamic kinematic motions similar to what one might find in small birds and insects. The active turbulence generator provides a means to introduce atmospheric-like turbulence into the wind tunnel to understand the coupling between turbulence and unsteady flow phenomena associated with bird and insect flight.
C1 [Hart, Adam; Ukeiley, Lawrence] Univ Florida, Dept Mech & Aerosp Engn, Res & Engn Educ Facil, Shalimar, FL USA.
RP Sytsma, M (reprint author), US Air Force, Res Lab, Munit Directorate, Eglin AFB, FL 32542 USA.
EM michael.sytsma@us.af.mil
FU AFOSR, under the Research Institute for Autonomous and Precision Guided
Systems; AFRL-RW; Florida Center for Advanced Aero Propulsion (FCAAP)
FX The author(s) disclosed receipt of the following financial support for
the research, authorship, and/or publication of this article: The
authors at the University of Florida would like to acknowledge partial
support for the development and characterization of the facility from
both AFOSR, under the Research Institute for Autonomous and Precision
Guided Systems and AFRL-RW along with the Florida Center for Advanced
Aero Propulsion (FCAAP).
NR 19
TC 0
Z9 0
U1 5
U2 6
PU SAGE PUBLICATIONS LTD
PI LONDON
PA 1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLAND
SN 1756-8293
EI 1756-8307
J9 INT J MICRO AIR VEH
JI Int. J. Micro Air Veh.
PD JUN
PY 2016
VL 8
IS 2
BP 79
EP 91
DI 10.1177/1756829316653696
PG 13
WC Engineering, Aerospace
SC Engineering
GA DO3VA
UT WOS:000377709100003
ER
PT J
AU Wu, XF
Varshney, V
Lee, J
Zhang, T
Wohlwend, JL
Roy, AK
Luo, TF
AF Wu, Xufei
Varshney, Vikas
Lee, Jonghoon
Zhang, Teng
Wohlwend, Jennifer L.
Roy, Ajit K.
Luo, Tengfei
TI Hydrogenation of Penta-Graphene Leads to Unexpected Large Improvement in
Thermal Conductivity
SO NANO LETTERS
LA English
DT Article
DE Penta-graphene; hydrogenated penta-graphene; graphene; thermal
conductivity; anharmonicity; first-principles calculation
ID GENERALIZED GRADIENT APPROXIMATION; TEMPERATURE-DEPENDENT RAMAN;
SINGLE-LAYER GRAPHENE; POLYCRYSTALLINE GRAPHENE; ELECTRON LOCALIZATION;
TRANSPORT; SPECTROSCOPY; FULLERENE; CRYSTAL; PHONONS
AB Penta-graphene (PG) has been identified as a novel two-dimensional (2D) material with an intrinsic bandgap, which makes it especially promising for electronics applications. In this work, we use first-principles lattice dynamics and iterative solution of the phonon Boltzmann transport equation (BTE) to determine the thermal conductivity of PG and its more stable derivative, hydrogenated penta-graphene (HPG). As a comparison, we also studied the effect of hydrogenation on graphene thermal conductivity: In contrast to hydrogenation of graphene, which leads, to a dramatic decrease in thermal conductivity, HPG shows a notable increase in thermal conductivity, which is much higher than that of PG, Considering the necessity of using the same thickness when comparing thermal conductivity values of different 2D materials, hydrogenation leads to a 63% reduction in thermal conductivity for graphene, while it results in a 76% increase for PG. The high thermal conductivity of HPG makes it more thermally Conductive than most other semiconducting 2D materials, such as. the transition metal chalcogenides. Our detailed analyses show that the primary reason for the counterintuitive hydrogenation-induced thermal conductivity enhancement is the weaker bond anharmonicity in HPG than PG. This leads to weaker phonon scattering after hydrogenation, despite the increase in the phonon scattering phase space. The high thermal conductivity of HPG may inspire intensive research around HPG and other derivatives of PG as potential materials for future nanoelectronic devices. The fundamental physics understood from this study may open up a new strategy to engineer thermal transport properties of other 2D materials by controlling bond anharmonicity via functionalization.
C1 [Wu, Xufei; Zhang, Teng; Luo, Tengfei] Univ Notre Dame, Aerosp & Mech Engn, Notre Dame, IN 46530 USA.
[Varshney, Vikas; Lee, Jonghoon; Wohlwend, Jennifer L.; Roy, Ajit K.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Varshney, Vikas; Lee, Jonghoon; Wohlwend, Jennifer L.] Universal Technol Corp, Dayton, OH 45342 USA.
[Luo, Tengfei] Ctr Sustainable Energy Notre Dame, Notre Dame, IN 46530 USA.
RP Luo, TF (reprint author), Univ Notre Dame, Aerosp & Mech Engn, Notre Dame, IN 46530 USA.
EM tluo@nd.edu
RI Luo, Tengfei/A-8354-2013
FU NSF [1433490]; Air Force Summer Faculty Fellowship; NCIS Darter
[TG-CTS100078]
FX X.W. thanks the support by NSF (1433490). T.L. thanks the support from
the Air Force Summer Faculty Fellowship. The simulations are supported
by the Notre Dame Center for Research Computing, and NSF through XSEDE
computing resources provided by SDSC Trestles, Comet, and TACC Stampede
and NCIS Darter under Grant TG-CTS100078.
NR 62
TC 12
Z9 12
U1 25
U2 46
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
EI 1530-6992
J9 NANO LETT
JI Nano Lett.
PD JUN
PY 2016
VL 16
IS 6
BP 3925
EP 3935
DI 10.1021/acs.nanolett.6b01536
PG 11
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA DO2WW
UT WOS:000377642700074
PM 27152879
ER
PT J
AU Clark, G
Schaibley, JR
Ross, J
Taniguchi, T
Watanabe, K
Hendrickson, JR
Mou, S
Yao, W
Xu, XD
AF Clark, Genevieve
Schaibley, John R.
Ross, Jason
Taniguchi, Takashi
Watanabe, Kenji
Hendrickson, Joshua R.
Mou, Shin
Yao, Wang
Xu, Xiaodong
TI Single Defect Light-Emitting Diode in a van der Waals Heterostructure
SO NANO LETTERS
LA English
DT Article
DE Transition metal dichalcogenides; tungsten diselenide; van der Waals
heterostructure; electroluminescence; single defect
ID ATOMICALLY THIN SEMICONDUCTOR; MONOLAYER WSE2; QUANTUM EMITTERS;
EMISSION; EXCITONS; DOTS
AB Single defects in monolayer WSe2 have been shown to be a new class of single photon emitters and have potential applications in quantum technologies. Whereas previous work relied on optical excitation of single defects in isolated WSe2 monolayers, in this work we demonstrate electrically driven single defect light emission by using both vertical and lateral van der Waals heterostructure devices. In both device geometries, we use few layer graphene as the source and drain and hexagonal boron nitride as the dielectric spacer layers for engineered tunneling contacts. In addition, the lateral devices utilize a split back gate design to realize an electrostatically defined p-i-n junction. At low current densities and low temperatures (similar to 5 K), we observe narrow spectral lines in the electroluminescence (EL) whose properties are consistent with optically excited defect bound excitons. We show that the, emission originates from spatially localized regions of the sample, and the EL spectrum from single defects has a doublet with the characteristic exchange splitting and linearly polarized selection rules. All are consistent with previously reported single photon emitters in optical measurements. Our results pave the way for on-chip and electrically driven single photon sources in two-dimensional semiconductors for quantum technology applications.
C1 [Clark, Genevieve; Ross, Jason; Xu, Xiaodong] Univ Washington, Dept Mat Sci & Engn, Seattle, WA 98195 USA.
[Schaibley, John R.; Xu, Xiaodong] Univ Washington, Dept Phys, Seattle, WA 98195 USA.
[Taniguchi, Takashi; Watanabe, Kenji] Natl Inst Mat Sci, Adv Mat Lab, Tsukuba, Ibaraki 3050044, Japan.
[Hendrickson, Joshua R.] Air Force Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
[Mou, Shin] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Yao, Wang] Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China.
[Yao, Wang] Univ Hong Kong, Ctr Theoret & Computat Phys, Hong Kong, Hong Kong, Peoples R China.
RP Xu, XD (reprint author), Univ Washington, Dept Mat Sci & Engn, Seattle, WA 98195 USA.; Xu, XD (reprint author), Univ Washington, Dept Phys, Seattle, WA 98195 USA.
EM xuxd@uw.edu
RI TANIGUCHI, Takashi/H-2718-2011; Yao, Wang/C-1353-2008
OI Yao, Wang/0000-0003-2883-4528
FU AFOSR [FA9550-14-1-0277]; AFRL Material & Manufacutring Directorate,
Laboratory Director's Fund; Elemental Strategy Initiative; JSPS;
Croucher Foundation; Research Grants Council; University Grants
Committee of Hong Kong [HKU17305914P, HKU9/CRF/13G, AoE/P-04/08]; State
of Washington; [AFOSR-15RY159COR]; [AFOSR-14RX12COR]
FX This work is supported by AFOSR (FA9550-14-1-0277) and AFRL Material &
Manufacutring Directorate, Laboratory Director's Fund. J.H. acknowledges
support from AFOSR-15RY159COR (PM: Gernot Pomrenke). M.S. acknowledges
support from AFOSR-14RX12COR (PM: Gernot Pomrenke). K.W. and T.T.
acknowledge support from the Elemental Strategy Initiative conducted by
the MEXT, Japan and a Grant-in-Aid for Scientific Research on Innovative
Areas "Science of Atomic Layers" from JSPS. W.Y. were supported by the
Croucher Foundation (Croucher Innovation Award) and the Research Grants
Council and University Grants Committee of Hong Kong (HKU17305914P,
HKU9/CRF/13G, AoE/P-04/08). X.X. acknowledges a Cottrell Scholar Award
and support from the State of Washington-funded Clean Energy Institute.
NR 30
TC 5
Z9 5
U1 43
U2 89
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
EI 1530-6992
J9 NANO LETT
JI Nano Lett.
PD JUN
PY 2016
VL 16
IS 6
BP 3944
EP 3948
DI 10.1021/acs.nanolett.6b01580
PG 5
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA DO2WW
UT WOS:000377642700076
PM 27213921
ER
PT J
AU Menger, RP
Wolf, ME
Lang, RW
Smith, DR
Nanda, A
Letarte, P
Rosner, MK
AF Menger, Richard P.
Wolf, Michael E.
Lang, Richard W.
Smith, Donald R.
Nanda, Anil
Letarte, Peter
Rosner, Michael K.
TI Military Neurosurgery: A Range of Service Options
SO NEUROSURGERY
LA English
DT Article
DE Military neurosurgery; Military service; Socioeconomic analysis; United
States Air Force; United States Army; United States Navy
ID EXPERIENCE
AB The pathway to military neurosurgical practice can include a number of accession options. This article is an objective comparison of fiscal, tangible, and intangible benefits provided through different military neurosurgery career paths. Neurosurgeons may train through active duty, reserve, or civilian pathways. These modalities were evaluated on the basis of economic data during residency and the initial 3 years afterwards. When available, military base pay, basic allowance for housing and subsistence, variable special pay, board certified pay, incentive pay, multiyear special pay, reserve drill pay, civilian salary, income tax, and other tax incentives were analyzed using publically available data. Civilians had lower residency pay, higher starting salaries, increased taxes, malpractice insurance cost, and increased overhead. Active duty service saw higher residency pay, lower starting salary, tax incentives, increased benefits, and almost no associated overhead including malpractice coverage. Reserve service saw a combination of civilian benefits with supplementation of reserve drill pay in return for weekend drill and the possibility of deployment and activation. Being a neurosurgeon in the military is extremely rewarding. From a financial perspective, ignoring intangibles, this article shows most entry pathways with initially modest differences between the cumulative salaries of active duty and civilian career paths and with higher overall compensation available from the reserve service option. These pathways become increasingly discrepant over time as civilian pay greatly exceeds that of military neurosurgeons. We hope that those curious about or considering serving in the United States military benefit from our accounting and review of these comparative paths.ABBREVIATIONS:FAP, Financial Assistance ProgramNADDS, Navy Active Duty Delay for SpecialistsTMS, Training in Medical Specialties
C1 [Menger, Richard P.; Smith, Donald R.; Nanda, Anil] Louisiana State Univ Hlth Sci, Dept Neurosurg, Shreveport, LA USA.
[Wolf, Michael E.] Air Test & Evaluat Squadron Three Zero, Dept Aerosp Med, Point Mugu Nawc, CA USA.
[Menger, Richard P.; Wolf, Michael E.; Lang, Richard W.; Letarte, Peter] US Navy, Philadelphia, PA USA.
[Smith, Donald R.] US Air Force, Boulder, CO USA.
[Letarte, Peter] Loyola Univ, Med Ctr, Dept Neurol Surg, 2160 S 1st Ave, Maywood, IL 60153 USA.
[Rosner, Michael K.] Walter Reed Natl Mil Med Ctr, Neurosurg Serv, Bethesda, MD USA.
[Rosner, Michael K.] US Army, Boulder, CO USA.
RP Menger, RP (reprint author), 1501 Kings Highway, Shreveport, LA 71103 USA.
EM richard.menger@gmail.com
NR 12
TC 0
Z9 0
U1 1
U2 1
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA TWO COMMERCE SQ, 2001 MARKET ST, PHILADELPHIA, PA 19103 USA
SN 0148-396X
J9 NEUROSURGERY
JI Neurosurgery
PD JUN
PY 2016
VL 78
IS 6
BP 765
EP 773
DI 10.1227/NEU.0000000000001084
PG 9
WC Clinical Neurology; Surgery
SC Neurosciences & Neurology; Surgery
GA DN2GO
UT WOS:000376882300016
PM 26528672
ER
PT J
AU Grejner-Brzezinska, DA
Toth, CK
Moore, T
Raquet, JF
Miller, MM
Kealy, A
AF Grejner-Brzezinska, Dorota A.
Toth, Charles K.
Moore, Terry
Raquet, John F.
Miller, Mikel M.
Kealy, Allison
TI Multisensor Navigation Systems: A Remedy for GNSS Vulnerabilities?
SO PROCEEDINGS OF THE IEEE
LA English
DT Article
DE Global navigation satellite systems (GNSS); resilient navigation; sensor
integration
ID ENVIRONMENTS; PERFORMANCE; INTEGRATION; FEATURES; IMAGE
AB Space-based positioning, navigation, and timing (PNT) technologies, such as the global navigation satellite systems (GNSS) provide position, velocity, and timing information to an unlimited number of users around the world. In recent years, PNT information has become increasingly critical to the security, safety, and prosperity of the World's population, and is now widely recognized as an essential element of the global information infrastructure. Due to its vulnerabilities and line-of-sight requirements, GNSS alone is unable to provide PNT with the required levels of integrity, accuracy, continuity, and reliability. A multisensor navigation approach offers an effective augmentation in GNSS-challenged environments that holds a promise of delivering robust and resilient PNT. Traditionally, sensors such as inertial measurement units (IMUs), barometers, magnetometers, odometers, and digital compasses, have been used. However, recent trends have largely focused on image-based, terrain-based and collaborative navigation to recover the user location. This paper offers a review of the technological advances that have taken place in PNT over the last two decades, and discusses various hybridizations of multisensory systems, building upon the fundamental GNSS/IMU integration. The most important conclusion of this study is that in order to meet the challenging goals of delivering continuous, accurate and robust PNT to the ever-growing numbers of users, the hybridization of a suite of different PNT solutions is required.
C1 [Grejner-Brzezinska, Dorota A.; Toth, Charles K.] Ohio State Univ, Dept Civil Environm & Geodet Engn, Columbus, OH 43210 USA.
[Moore, Terry] Univ Nottingham, Nottingham Geospatial Inst, Nottingham NG7 2TU, England.
[Raquet, John F.] US Air Force, Dept Elect & Comp Engn, Inst Technol, Wright Patterson AFB, OH 45433 USA.
[Miller, Mikel M.] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Kealy, Allison] Univ Melbourne, Melbourne, Vic 3010, Australia.
RP Grejner-Brzezinska, DA; Toth, CK (reprint author), Ohio State Univ, Dept Civil Environm & Geodet Engn, Columbus, OH 43210 USA.; Moore, T (reprint author), Univ Nottingham, Nottingham Geospatial Inst, Nottingham NG7 2TU, England.; Raquet, JF (reprint author), US Air Force, Dept Elect & Comp Engn, Inst Technol, Wright Patterson AFB, OH 45433 USA.; Miller, MM (reprint author), US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.; Kealy, A (reprint author), Univ Melbourne, Melbourne, Vic 3010, Australia.
EM grejner-brzezinska.1@osu.edu; toth.2@osu.edu;
terry.moore@nottingham.ac.uk; john.raquet@afit.edu;
mikel.miller@us.af.mil; a.kealy@unimelb.edu.au
OI Moore, Terry/0000-0002-6169-059X
NR 54
TC 0
Z9 0
U1 5
U2 10
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9219
EI 1558-2256
J9 P IEEE
JI Proc. IEEE
PD JUN
PY 2016
VL 104
IS 6
SI SI
BP 1339
EP 1353
DI 10.1109/JPROC.2016.2528538
PG 15
WC Engineering, Electrical & Electronic
SC Engineering
GA DN5MH
UT WOS:000377112000015
ER
PT J
AU Morajkar, RR
Klomparens, RL
Eagle, WE
Driscoll, JF
Gamba, M
Benek, JA
AF Morajkar, Rohan R.
Klomparens, Robin L.
Eagle, W. Ethan
Driscoll, James F.
Gamba, Mirko
Benek, John A.
TI Relationship Between Intermittent Separation and Vortex Structure in a
Three-Dimensional Shock/Boundary-Layer Interaction
SO AIAA JOURNAL
LA English
DT Article; Proceedings Paper
CT 52nd AIAA Aerospace Sciences Meeting
CY JAN 12-18, 2014
CL National Harbor, MD
SP AIAA
ID TURBULENT BOUNDARY-LAYER; LOW-FREQUENCY UNSTEADINESS; TRANSONIC CHANNEL
FLOWS; SHOCK-WAVE; SWEPT-SHOCK; IDENTIFICATION; CORNER; TOPOLOGY; MODEL;
DUCT
AB The relationship between the three-dimensional vortex structures and flow-separation zones generated by a shock wave/boundary-layer interaction within a low-aspect-ratio duct was studied using stereoscopic particle imaging velocimetry measurements. In this configuration, the interaction of the incident shock with all walls was important in controlling the flowfield; the three interactions coupled to produce a strongly distorted flowfield. Conditional sampling was used to construct the local probability of reverse flow maps, and thus quantify the distribution of regions of intermittent separation on both bottom-walls and side-walls. The latter regions were found to be significantly larger and more likely to separate than the former. Thus, it was concluded that the sidewall and corner flow interactions dominate in this configuration. A triple decomposition of motion was used to construct a three-dimensional representation of the vortex features generated by the interaction. The results indicated that the flowfield was dominated by three vortex systems: 1)the vortex associated with the sidewall swept-shock interaction; 2)a complex, possibly branched, vortex pair induced on the bottom wall; and 3)a vortex pair induced by the flow at the corner, which coupled the two interactions. The role of the three vortex systems on the onset of flow separation was also explored and discussed.
C1 [Morajkar, Rohan R.; Klomparens, Robin L.; Driscoll, James F.; Gamba, Mirko] Univ Michigan, Dept Aerosp Engn, Ann Arbor, MI 48109 USA.
[Eagle, W. Ethan] Univ Michigan, Ann Arbor, MI 48109 USA.
[Benek, John A.] US Air Force, Res Lab, Computat Sci Ctr, AFRL Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
[Eagle, W. Ethan] Sandia Natl Labs, Livermore, CA 94550 USA.
RP Morajkar, RR (reprint author), Univ Michigan, Dept Aerosp Engn, Ann Arbor, MI 48109 USA.
OI Eagle, W. Ethan/0000-0002-1425-0778
NR 67
TC 0
Z9 0
U1 6
U2 11
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0001-1452
EI 1533-385X
J9 AIAA J
JI AIAA J.
PD JUN
PY 2016
VL 54
IS 6
BP 1862
EP 1880
DI 10.2514/1.J053905
PG 19
WC Engineering, Aerospace
SC Engineering
GA DM9FP
UT WOS:000376670800004
ER
PT J
AU Yoon, J
Dunlap, S
Butts, J
Rice, M
Ramsey, B
AF Yoon, Jungsang
Dunlap, Stephen
Butts, Jonathan
Rice, Mason
Ramsey, Benjamin
TI Evaluating the readiness of cyber first responders responsible for
critical infrastructure protection
SO INTERNATIONAL JOURNAL OF CRITICAL INFRASTRUCTURE PROTECTION
LA English
DT Article
DE Cyber attacks; Cyber emergency response personnel; Evaluation criteria;
Training exercises
AB First responders go through rigorous training and evaluation to ensure that they are adequately prepared for emergencies. For example, fire departments continually evaluate the readiness of their firefighting personnel using a defined set of criteria that measures their performance in fire suppression and rescue procedures. However, in the cyber security domain, similar evaluation criteria and rigor are severely lacking for professionals who help detect, respond to and recover from cyber-based attacks against critical infrastructure assets. To address the gap, this paper provides a framework for evaluating the readiness of cyber first responders responsible for critical infrastructure protection. The evaluation criteria are conceptually based on the NFPA 1410 standards that are used to assess the readiness of firefighter first responders. The utility of the framework is illustrated using a military cyber training exercise that evaluated the readiness of professionals who respond to real-world cyber attack scenarios. Published by Elsevier B.V.
C1 [Yoon, Jungsang; Dunlap, Stephen; Rice, Mason; Ramsey, Benjamin] US Air Force, Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.
[Butts, Jonathan] QED Secure Solut, 417 Forest Ridge Dr, Coppell, TX 75019 USA.
RP Rice, M (reprint author), US Air Force, Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.
EM mason.rice@afit.edu
NR 19
TC 1
Z9 1
U1 5
U2 9
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1874-5482
EI 2212-2087
J9 INT J CRIT INFR PROT
JI Int. J. Crit. Infrastruct. Prot.
PD JUN
PY 2016
VL 13
BP 19
EP 27
DI 10.1016/j.ijcip.2016.02.003
PG 9
WC Computer Science, Information Systems; Engineering, Multidisciplinary
SC Computer Science; Engineering
GA DM6GK
UT WOS:000376448400003
ER
PT J
AU Parker, JT
Schniter, P
AF Parker, Jason T.
Schniter, Philip
TI Parametric Bilinear Generalized Approximate Message Passing
SO IEEE JOURNAL OF SELECTED TOPICS IN SIGNAL PROCESSING
LA English
DT Article
DE Approximate message passing; belief propagation; bilinear estimation;
blind deconvolution; self-calibration; joint channel-symbol estimation;
matrix compressive sensing
ID MATRIX DECOMPOSITION; MAXIMUM-LIKELIHOOD; IDENTIFICATION; ALGORITHM;
SPARSITY
AB We propose a scheme to estimate the parameters b(i) and c(j) of the bilinear form z(m) = Sigma(i,j) b(i)z(m)((i,j))c(j) from noisy measurements {y(m)}(m=1)(M), where y(m) and z(m) are related through an arbitrary likelihood function and z(m)((i,j)) are known. Our scheme is based on generalized approximate message passing (G-AMP): it treats b(i) and c(j) as random variables and z(m)((i,j)) as an i.i.d. Gaussian 3-way tensor in order to derive a tractable simplification of the sum-product algorithm in the large-system limit. It generalizes previous instances of bilinear G-AMP, such as those that estimate matrices B and C from a noisy measurement of Z = BC, allowing the application of AMP methods to problems such as self-calibration, blind deconvolution, and matrix compressive sensing. Numerical experiments confirm the accuracy and computational efficiency of the proposed approach.
C1 [Parker, Jason T.] US Air Force, Res Lab, Dayton, OH 45433 USA.
[Schniter, Philip] Ohio State Univ, Dept Elect & Comp Engn, Columbus, OH 43210 USA.
RP Parker, JT (reprint author), US Air Force, Res Lab, Dayton, OH 45433 USA.; Schniter, P (reprint author), Ohio State Univ, Dept Elect & Comp Engn, Columbus, OH 43210 USA.
EM jason.parker.13@us.af.mil; schniter@ece.osu.edu
FU AFOSR Lab Task [11RY02COR]; NSF [IIP-0968910, CCF-1218754, CCF-1527162]
FX The work of J. T. Parker was supported by AFOSR Lab Task 11RY02COR. The
work of P. Schniter was supported in part by the NSF under Grants
IIP-0968910, CCF-1218754, and CCF-1527162, and in part by an allocation
of computing time from the Ohio Supercomputer Center. Portions of this
work appeared in [1] and were presented at the Information Theory and
Applications Workshop, La Jolla, CA, USA, February 2015 and 2016. The
guest editor coordinating the review of this manuscript and approving it
for publication was Prof. Justin Romberg.
NR 52
TC 2
Z9 2
U1 1
U2 1
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1932-4553
EI 1941-0484
J9 IEEE J-STSP
JI IEEE J. Sel. Top. Signal Process.
PD JUN
PY 2016
VL 10
IS 4
BP 795
EP 808
DI 10.1109/JSTSP.2016.2539123
PG 14
WC Engineering, Electrical & Electronic
SC Engineering
GA DM1IK
UT WOS:000376098700016
ER
PT J
AU Sunberg, Z
Chakravorty, S
Erwin, RS
AF Sunberg, Zachary
Chakravorty, Suman
Erwin, Richard Scott
TI Information Space Receding Horizon Control for Multisensor Tasking
Problems
SO IEEE TRANSACTIONS ON CYBERNETICS
LA English
DT Article
DE Sensor scheduling; situational awareness; stochastic systems
ID MODEL-PREDICTIVE CONTROL; COOPERATIVE CONTROL; SENSOR PLATFORMS;
SYSTEMS; NETWORK; POMDPS
AB In this paper, we present a receding horizon solution to the problem of optimal scheduling for multiple sensors monitoring a group of dynamical targets. The term target is used here in the classic sense of being the object that is being sensed or observed by the sensors. This problem is motivated by the space situational awareness (SSA) problem. The multisensor optimal scheduling problem can be posed as a multiagent Markov decision process on the information space which has a dynamic programming (DP) solution. We present a simulation-based stochastic optimization technique that exploits the structure inherent in the problem to obtain variance reduction along with a distributed solution. This stochastic optimization technique is combined with a receding horizon approach which uses online solution of the control problems to obviate the need to solve the computationally intractable multiagent information space DP problem and hence, makes the technique computationally tractable. The technique is tested on a moderate scale SSA example which is nonetheless computationally intractable for existing solution techniques.
C1 [Sunberg, Zachary] Stanford Univ, Dept Aeronaut & Astronaut, Stanford, CA 94305 USA.
[Chakravorty, Suman] Texas A&M Univ, Dept Aerosp Engn, College Stn, TX 77843 USA.
[Erwin, Richard Scott] US Air Force, Res Lab, Space Vehicles Directorate, Albuquerque, NM 87117 USA.
RP Sunberg, Z (reprint author), Stanford Univ, Dept Aeronaut & Astronaut, Stanford, CA 94305 USA.; Chakravorty, S (reprint author), Texas A&M Univ, Dept Aerosp Engn, College Stn, TX 77843 USA.
EM sunbergzach@gmail.com; schakrav@aero.tamu.edu
NR 40
TC 0
Z9 0
U1 2
U2 2
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 2168-2267
EI 2168-2275
J9 IEEE T CYBERNETICS
JI IEEE T. Cybern.
PD JUN
PY 2016
VL 46
IS 6
BP 1325
EP 1336
DI 10.1109/TCYB.2015.2445744
PG 12
WC Computer Science, Artificial Intelligence; Computer Science, Cybernetics
SC Computer Science
GA DM1MS
UT WOS:000376110100007
PM 26259208
ER
PT J
AU Schafrik, RE
AF Schafrik, Robert E.
TI Materials for a Non-Steady-State World
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Editorial Material
C1 [Schafrik, Robert E.] GE Aviat, Mat & Proc Engn Dept, Evendale, OH USA.
[Schafrik, Robert E.] GE Aviat, Mat & Proc Engn, Evendale, OH USA.
[Schafrik, Robert E.] US Air Force, Washington, DC USA.
[Schafrik, Robert E.] NRCs Natl Mat & Mfg Board, Washington, DC USA.
RP Schafrik, RE (reprint author), ASM Int, Washington, DC USA.
EM robert.schafrik@yahoo.com
NR 18
TC 1
Z9 1
U1 2
U2 5
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1073-5623
EI 1543-1940
J9 METALL MATER TRANS A
JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
PD JUN
PY 2016
VL 47A
IS 6
BP 2539
EP 2549
DI 10.1007/s11661-016-3442-6
PG 11
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA DL0NW
UT WOS:000375330700001
ER
PT J
AU Wampler, D
Kharod, C
Bolleter, S
Burkett, A
Gabehart, C
Manifold, C
AF Wampler, David
Kharod, Chetan
Bolleter, Scotty
Burkett, Alison
Gabehart, Caitlin
Manifold, Craig
TI A randomized control hands-on defibrillation study-Barrier use
evaluation
SO RESUSCITATION
LA English
DT Article
DE Hands on defibrillation; Emergency medical services; Prehospital
medicine; Cardiac arrest
ID EXTERNAL DEFIBRILLATION; SAFETY; GLOVES
AB Introduction: Chest compressions and defibrillation are the only therapies proven to increase survival in cardiac arrest. Historically, rescuers must remove hands to shock, thereby interrupting chest compressions. This hands-off time results in a zero blood flow state. Pauses have been associated with poorer neurological recovery.
Methods: This was a blinded randomized control cadaver study evaluating the detection of defibrillation during manual chest compressions. An active defibrillator was connected to the cadaver in the sternum-apex configuration. The sham defibrillator was not connected to the cadaver. Subjects performed chest compressions using 6 barrier types: barehand, single and double layer nitrile gloves, firefighter gloves, neoprene pad, and a manual chest compression/decompression device. Randomized defibrillations (10 per barrier type) were delivered at 30 joules (J) for bare hand and 360 J for all other barriers. After each shock, the subject indicated degree of sensation on a VAS scale.
Results: Ten subjects participated. All subjects detected 30j shocks during barehand compressions, with only 1 undetected real shock. All barriers combined totaled 500 shocks delivered. Five (1%) active shocks were detected, 1(0.2%) single layer of Nitrile, 3(0.6%) with double layer nitrile, and 1(0.2%) with the neoprene barrier. One sham shock was reported with the single layer nitrile glove. No shocks were detected with fire gloves or compression decompression device. All shocks detected barely perceptible (0.25(+/- 0.05) cm on 10 cm VAS scale).
Conclusions: Nitrile gloves and neoprene pad prevent (99%) responder's detection of defibrillation of a cadaver. Fire gloves and compression decompression device prevented detection. (C) 2016 Elsevier Ireland Ltd. All rights reserved.
C1 [Wampler, David; Gabehart, Caitlin; Manifold, Craig] Univ Texas Hlth Sci Ctr San Antonio, Dept Emergency Hlth Sci, 4201 Med Dr Suite 120, San Antonio, TX 78229 USA.
[Kharod, Chetan] United States Air Force, Mil EMS & Disaster Med Fellowship, Joint Base San Antonio, San Antonio, TX USA.
[Bolleter, Scotty; Burkett, Alison] Ctr Emergency Hlth Sci, Bulverde Spring Branch Emergency Serv, Spring Branch, TX USA.
RP Wampler, D (reprint author), Univ Texas Hlth Sci Ctr San Antonio, Dept Emergency Hlth Sci, 4201 Med Dr Suite 120, San Antonio, TX 78229 USA.
EM wamplerd@uthscsa.edu
OI Kharod, Chetan/0000-0003-4352-8887
FU Bulverde Spring Branch Emergency Services; Centre for Emergency Health
Sciences; Department of Emergency Health Sciences, UTHSCSA
FX Internal funds were used to support this project, provided by Bulverde
Spring Branch Emergency Services, Centre for Emergency Health Sciences,
and the Department of Emergency Health Sciences, UTHSCSA.
NR 16
TC 1
Z9 1
U1 0
U2 1
PU ELSEVIER IRELAND LTD
PI CLARE
PA ELSEVIER HOUSE, BROOKVALE PLAZA, EAST PARK SHANNON, CO, CLARE, 00000,
IRELAND
SN 0300-9572
J9 RESUSCITATION
JI Resuscitation
PD JUN
PY 2016
VL 103
BP 37
EP 40
DI 10.1016/j.resuscitation.2016.03.019
PG 4
WC Critical Care Medicine; Emergency Medicine
SC General & Internal Medicine; Emergency Medicine
GA DL8NL
UT WOS:000375898600019
PM 27036661
ER
PT J
AU Leite, GB
Paranjape, K
Hallenbeck, PC
AF Leite, Gustavo B.
Paranjape, Kiran
Hallenbeck, Patrick C.
TI Breakfast of champions: Fast lipid accumulation by cultures of Chlorella
and Scenedesmus induced by xylose
SO ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
LA English
DT Article
DE Microalgae; Chlorella vulgaris; Xylose; Lipid enhancement; Mixotrophic
cultivation; Algal biofuels
ID WASTE-WATER TREATMENT; SACCHAROMYCES-CEREVISIAE; MICROALGAE CULTIVATION;
FLUORESCENCE METHOD; MIXOTROPHIC GROWTH; BIOFUEL PRODUCTION; NEUTRAL
LIPIDS; NILE RED; SOROKINIANA; ENHANCEMENT
AB The use of wastewater for algal cultivation could couple waste treatment credits with access to water and low-cost nutrients. The pulp & paper industry produces a waste stream rich in hemicellulose, where the major component is xylose. This pentose was previously shown to be relatively toxic to algal cells. Here its short term effects on Chlorella sp. and Scenedesmus sp. strains were evaluated. Xylose induced a quick boost in the cellular lipid content of the Chlorella strains, with flow cytometry data showing an increase of up to 4.1 fold in only six to 12 h, accompanied by growth arrest. After peak lipid accumulation, these strains started losing chlorophyll with complete loss over the next few days. However, addition of xylose to cultures of the Scenedesmus sp. did not show any negative effects. This strain was shown to be capable of both mixotrophic growth in the light and dark heterotrophic growth with xylose. These results suggest that xylose could be a substitute for the nitrogen starvation strategy for lipid content enhancement in Chlorella sp. strains, with higher performance in a fraction of the time required by the nutrient starvation method; and as carbon source for Scenedesmaceae strains. (C) 2016 Elsevier B.V. All rights reserved.
C1 [Leite, Gustavo B.; Paranjape, Kiran; Hallenbeck, Patrick C.] Univ Montreal, Dept Microbiol Infectiol & Immunol, Ctr Ville, CP 6128, Montreal, PQ H3C 3J7, Canada.
[Hallenbeck, Patrick C.] US Air Force Acad, Dept Biol, Life Sci Res Ctr, 2355 Fac Dr, Usaf Acad, CO 80840 USA.
RP Hallenbeck, PC (reprint author), Univ Montreal, Dept Microbiol Infectiol & Immunol, Ctr Ville, CP 6128, Montreal, PQ H3C 3J7, Canada.
EM patrick.hallenbeck@umontreal.ca
RI Leite, Gustavo/B-7382-2014
OI Leite, Gustavo/0000-0002-7181-1236
FU FQRNT (Le Fonds Quebecois de la Recherche sur la Nature et les
Technologies) [2011-GZ-141307]; Bioremediation d'effluents industriel
provenant de l'industrie des biocarburants via la culture de biomasse
algale mixotrophe [24198]; CRSNG-STPGPBio-oil Recovery & CO2 Recycling
by Waste Stream Enhanced Microalgal Growth & Low Energy CO2-Related
Extraction [447266-13]; National Research Council Senior Research
Associateship Award at the Life Sciences Research Center, Department of
Biology, United States Air Force Academy
FX This research was supported by grants from FQRNT (Le Fonds Quebecois de
la Recherche sur la Nature et les Technologies), programme de recherche
en partenariat contribuant a la sequestration des gaz a effet de serre
(2011-GZ-141307) P.C.H., by Bioremediation d'effluents industriel
provenant de l'industrie des biocarburants via la culture de biomasse
algale mixotrophe (Numero de reference: 24198) and by CRSNG-STPGP
447266-13 Bio-oil Recovery & CO2 Recycling by Waste Stream Enhanced
Microalgal Growth & Low Energy CO2-Related Extraction. PCH holds a
National Research Council Senior Research Associateship Award at the
Life Sciences Research Center, Department of Biology, United States Air
Force Academy. The views expressed in this article are those of the
authors and do not reflect the official policy or position of the United
States Air Force, the Department of Defense, or the US Government. We
thank Patrick McGinn and Shabana Bhatti (Halifax, NS), NRC Institute for
Marine Biosciences, for advice and training at the Ketch Harbour
Research Center.
NR 36
TC 2
Z9 2
U1 10
U2 24
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 2211-9264
J9 ALGAL RES
JI Algal Res.
PD JUN
PY 2016
VL 16
BP 338
EP 348
DI 10.1016/j.algal.2016.03.041
PG 11
WC Biotechnology & Applied Microbiology
SC Biotechnology & Applied Microbiology
GA DL4MD
UT WOS:000375610000038
ER
PT J
AU Bandeira, AS
Fickus, M
Mixon, DG
Moreira, J
AF Bandeira, Afonso S.
Fickus, Matthew
Mixon, Dustin G.
Moreira, Joel
TI Derandomizing Restricted Isometries via the Legendre Symbol
SO CONSTRUCTIVE APPROXIMATION
LA English
DT Article
DE Derandomization; Legendre symbol; Small-bias sample space; Restricted
isometry property; Compressed sensing
ID JOHNSON-LINDENSTRAUSS; RANDOM PROJECTIONS; RIP MATRICES; PROPERTY;
CONSTRUCTIONS; CODES; RECOVERY; FOURIER; PRIMES
AB The restricted isometry property (RIP) is an important matrix condition in compressed sensing, but the best matrix constructions to date use randomness. This paper leverages pseudorandom properties of the Legendre symbol to reduce the number of random bits in an RIP matrix with Bernoulli entries. In this regard, the Legendre symbol is not special-our main result naturally generalizes to any small-bias sample space. We also conjecture that no random bits are necessary for our Legendre symbol-based construction.
C1 [Bandeira, Afonso S.] Princeton Univ, Program Appl & Computat Math, Princeton, NJ 08544 USA.
[Fickus, Matthew; Mixon, Dustin G.] US Air Force, Inst Technol, Dept Math & Stat, Wright Patterson AFB, OH 45433 USA.
[Moreira, Joel] Ohio State Univ, Dept Math, 231 W 18th Ave, Columbus, OH 43210 USA.
RP Moreira, J (reprint author), Ohio State Univ, Dept Math, 231 W 18th Ave, Columbus, OH 43210 USA.
EM ajsb@math.princeton.edu; matthew.fickus@afit.edu; dustin.mixon@afit.edu;
moreira@math.ohio-state.edu
FU AFOSR [FA9550-12-1-0317]; NSF [DMS-1321779]
FX The authors thank Prof. Peter Sarnak for insightful discussions. A. S.
Bandeira was supported by AFOSR Grant No. FA9550-12-1-0317, and M.
Fickus and D. G. Mixon were supported by NSF Grant No. DMS-1321779. The
views expressed in this article are those of the authors and do not
reflect the official policy or position of the United States Air Force,
Department of Defense, or the U.S. Government.
NR 38
TC 0
Z9 0
U1 0
U2 0
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0176-4276
EI 1432-0940
J9 CONSTR APPROX
JI Constr. Approx.
PD JUN
PY 2016
VL 43
IS 3
BP 409
EP 424
DI 10.1007/s00365-015-9310-6
PG 16
WC Mathematics
SC Mathematics
GA DL5YA
UT WOS:000375711800004
ER
PT J
AU Vaillancourt, J
Blasch, E
Gu, GR
Lu, XJ
Reinhardt, K
AF Vaillancourt, Jarrod
Blasch, Erik
Gu, Guiru
Lu, Xuejun
Reinhardt, Kitt
TI A Demonstration of On-Chip Self-Registered Image Fusion Using a
Voltage-Tunable Mid-Wave and Long-Wave Infrared Dual-Band Focal Plane
Array
SO IEEE SENSORS JOURNAL
LA English
DT Article
DE MWIR; LWIR sensing and imaging; image fusion; segmentation; on-chip
image fusion
ID INFORMATION MEASURE; PERFORMANCE; WAVELENGTH
AB In this paper, we obtain mid-wave infrared (MWIR), long-wave infrared (LWIR), and MWIR/LWIR dual-band images from a voltage tunable quantum dot focal plane array. The MWIR/LWIR dual-band image system allows collection of information from both bands and thus enables on-chip image fusion at the sensor with self-registered images of both bands. We compare the on-chip dual-band image with the off-chip-fused image of the MWIR and LWIR bands using standard image fusion methods. The on-chip image fusion shows much clearer features due to the self-registration in the dual-band image collection. The mutual information (Q(MI)) of the on-chip image fusion is also higher than that of the off-chip fused image. We also perform image segmentation for both the on-chip image fusion and the off-chip-fused image. The on-chip image fusion shows better background removal effect. Since no high-speed off-chip communication with an image fusion algorithm is needed, the on-chip self-registered image fusion is suitable for real-time sensing and image analysis.
C1 [Vaillancourt, Jarrod] Appl NanoFemto Technol LLC, Lowell, MA 01851 USA.
[Blasch, Erik] US Air Force, Res Lab, RYAA, Wright Patterson AFB, OH 45433 USA.
[Gu, Guiru] Stonehill Coll, Dept Phys, Easton, MA 02357 USA.
[Lu, Xuejun] Univ Massachusetts, Dept Elect & Comp Engn, Lowell, MA 01854 USA.
[Reinhardt, Kitt] US Air Force, Res Lab, RYDP, Wright Patterson AFB, OH 45433 USA.
RP Blasch, E (reprint author), US Air Force, Res Lab, RYAA, Wright Patterson AFB, OH 45433 USA.
EM jarrod.vaillancourt@appliednanofemto.com; erik.blasch.1@us.af.mil;
guiru_gu@uml.edu; xuejun_lu@uml.edu; kitt.reinhardt@us.af.mil
FU Air Force Office of Scientific Research [FA950-10-1-0070]; [13R102COR]
FX E. Blasch/K. Reinhardt were supported under grant 13R102COR and G. Gu/X.
Lu under grant FA950-10-1-0070 by the Air Force Office of Scientific
Research. The associate editor coordinating the review of this paper and
approving it for publication was Dr. Marco Petrovich. (Corresponding
author: Erik Blasch.)
NR 22
TC 2
Z9 2
U1 3
U2 8
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1530-437X
EI 1558-1748
J9 IEEE SENS J
JI IEEE Sens. J.
PD JUN 1
PY 2016
VL 16
IS 11
SI SI
BP 4374
EP 4379
DI 10.1109/JSEN.2016.2545520
PG 6
WC Engineering, Electrical & Electronic; Instruments & Instrumentation;
Physics, Applied
SC Engineering; Instruments & Instrumentation; Physics
GA DL3WH
UT WOS:000375563700048
ER
PT J
AU Zemtsova, GE
Apanaskevich, DA
Reeves, WK
Hahn, M
Snellgrove, A
Levin, ML
AF Zemtsova, Galina E.
Apanaskevich, Dmitry A.
Reeves, Will K.
Hahn, Micah
Snellgrove, Alyssa
Levin, Michael L.
TI Phylogeography of Rhipicephalus sanguineus sensu lato and its
relationships with climatic factors
SO EXPERIMENTAL AND APPLIED ACAROLOGY
LA English
DT Article
DE Rhipicephalus sanguineus; Genetic diversity; Phylogenetic analysis;
Phylogeographic pattern; Climate variables
ID BROWN DOG TICK; RICKETTSIA-RICKETTSII; ACARI IXODIDAE; SOUTH-AMERICA;
POPULATIONS; LATREILLE; SEQUENCES; REGIONS; GENERA
AB Brown dog ticks morphologically identifiable as Rhipicephalus sanguineus sensu lato, are distributed world-wide and their systematics is controversial. Results of genetic and reproductive compatibility studies of geographically distinct populations of R. sanguineus s.l. indicate that the R. sanguineus complex is paraphyletic. To further elucidate systematic relationships within R. sanguineus s.l. and geographic boundaries of its lineages, we conducted a phylogeographical study of 136 tick specimens from 23 countries. Voucher specimens were morphologically identified. A phylogenetic tree was constructed using concatenated partial mitochondrial 12S and 16S rDNA gene sequences and analyzed by the Neighbor-Joining method. A set of 19 bioclimatic variables within the WorldClim dataset were extracted and analyzed to assess correlations between distribution of R. sanguineus s.l. lineages and climatic variables. The following four branches are clearly recognized on the phylogenetic tree: R. sanguineus s.l.-tropical and temperate clades, R. leporis, and R. turanicus. DNA sequences of Rhipicephalus ticks from Israel differ from those of other groups. Strong association between geographical locations of major clades of R. sanguineus s.l. and temperature was identified. The tropical clade of R. sanguineus s.l. occupies areas with the annual mean temperature > 20 A degrees C, whereas the temperate clade is present in areas with the annual mean temperature < 20 A degrees C. Our results indicate that ticks in two closely related phylogenetic clades are adapted to different environmental conditions and support proposals for re-classification of R. sanguineus complex. Differences in R. sanguineus s.l. ecology and human/animal pathogens transmitted by different taxa of brown dog tick need to be studied.
C1 [Zemtsova, Galina E.; Snellgrove, Alyssa; Levin, Michael L.] Ctr Dis Control & Prevent, Rickettsial Zoonoses Branch, 1600 Clifton Rd,MS G-13, Atlanta, GA 30333 USA.
[Apanaskevich, Dmitry A.] Georgia So Univ, Inst Coastal Plain Sci, Statesboro, GA 30460 USA.
[Reeves, Will K.] US Air Force, Sch Aerosp Med, PHR, Wright Patterson AFB, OH 45433 USA.
[Hahn, Micah] Ctr Dis Control & Prevent, Div Vector Borne Dis, Ft Collins, CO USA.
[Hahn, Micah] Natl Ctr Atmospher Res, Res Applicat Lab, POB 3000, Boulder, CO 80307 USA.
RP Zemtsova, GE (reprint author), Ctr Dis Control & Prevent, Rickettsial Zoonoses Branch, 1600 Clifton Rd,MS G-13, Atlanta, GA 30333 USA.
EM GZemtsova@cdc.gov
NR 34
TC 4
Z9 4
U1 5
U2 11
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0168-8162
EI 1572-9702
J9 EXP APPL ACAROL
JI Exp. Appl. Acarol.
PD JUN
PY 2016
VL 69
IS 2
BP 191
EP 203
DI 10.1007/s10493-016-0035-4
PG 13
WC Entomology
SC Entomology
GA DK4TQ
UT WOS:000374912900006
PM 27003273
ER
PT J
AU Zhou, C
Yagotintsev, KA
Gao, P
Haugan, TJ
van der Laan, DC
Nijhuis, A
AF Zhou, C.
Yagotintsev, K. A.
Gao, P.
Haugan, T. J.
van der Laan, D. C.
Nijhuis, A.
TI Critical Current of Various REBCO Tapes Under Uniaxial Strain
SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
LA English
DT Article
DE Critical current; REBCO; superconducting tapes; uniaxial strain
ID YBCO COATED CONDUCTORS; DEPENDENCE; BEHAVIOR
AB For high-current REBCO superconductors in high magnet fields with currents on the order of 50 kA, single coated conductors must be assembled in a cable. Under operating conditions, such cables are subjected to combined torsion, axial, and transverse loads in the tapes and tape joints. As such, the single tape performance under applied axial strain is crucial to understand cable limitations, and important for choosing an appropriate tape geometry and tape supplier. The critical current (I-c) versus applied uniaxial strain and the relative strain irreversibility limit were measured on HTS tapes produced by five manufacturers. The Ic measurements were performed at 77 K in self-field with the sample tapes soldered to the U-shaped bending spring (U-spring). It has been observed that most of the tapes perform well under applied compressive strain. The dependence of Ic on applied strain and the irreversibility limits were found to be unique for each tape. The n-values of the tapes, unlike the Ic, are less sensitive to applied strain in the reversible regime. The results of different tapes are presented and compared.
C1 [Zhou, C.; Yagotintsev, K. A.; Gao, P.; Nijhuis, A.] Univ Twente, Fac Sci & Technol, NL-7522 NB Enschede, Netherlands.
[Haugan, T. J.] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
[van der Laan, D. C.] Adv Conductor Technol, Boulder, CO 80301 USA.
[van der Laan, D. C.] Univ Colorado, Boulder, CO 80301 USA.
RP Zhou, C (reprint author), Univ Twente, Fac Sci & Technol, NL-7522 NB Enschede, Netherlands.
EM c.zhou@utwente.nl
RI van der Laan, Danko/L-5098-2016
NR 17
TC 0
Z9 0
U1 13
U2 21
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1051-8223
EI 1558-2515
J9 IEEE T APPL SUPERCON
JI IEEE Trans. Appl. Supercond.
PD JUN
PY 2016
VL 26
IS 4
AR 8401304
DI 10.1109/TASC.2016.2535202
PG 4
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA DK6YQ
UT WOS:000375072100001
ER
PT J
AU Ooten, MK
Anthony, RJ
Lethander, AT
Clark, JP
AF Ooten, Michael K.
Anthony, Richard J.
Lethander, Andrew T.
Clark, John P.
TI Unsteady Aerodynamic Interaction in a Closely Coupled Turbine Consistent
With Contrarotation
SO JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME
LA English
DT Article
ID HEAT-TRANSFER MEASUREMENTS; ROTOR-STATOR INTERACTION; TRANSONIC TURBINE;
PRESSURE; BLADE; STAGE
AB The focus of the study presented here was to investigate the interaction between the blade and downstream vane of a stage-and-one-half transonic turbine via computation fluid dynamic (CFD) analysis and experimental data. A Reynolds-averaged Navier-Stokes (RANS) flow solver with the two-equation Wilcox 1998 k-omega turbulence model was used as the numerical analysis tool for comparison with all of the experiments conducted. The rigor and fidelity of both the experimental tests and numerical analysis methods were built through two-and three-dimensional steady-state comparisons, leading to threedimensional time-accurate comparisons. This was accomplished by first testing the midspan and quarter-tip two-dimensional geometries of the blade in a linear transonic cascade. The effects of varying the incidence angle and pressure ratio on the pressure distribution were captured both numerically and experimentally. This was used during the stage-and-one-half post-test analysis to confirm that the target corrected speed and pressure ratio were achieved. Then, in a full annulus facility, the first vane itself was tested in order to characterize the flowfield exiting the vane that would be provided to the blade row during the rotating experiments. Finally, the full stage-and-one-half transonic turbine was tested in the full annulus cascade with a data resolution not seen in any studies to date. A rigorous convergence study was conducted in order to sufficiently model the flow physics of the transonic turbine. The surface pressure traces and the discrete Fourier transforms (DFT) thereof were compared to the numerical analysis. Shock trajectories were tracked through the use of two-point space-time correlation coefficients. Very good agreement was seen when comparing the numerical analysis to the experimental data. The unsteady interaction between the blade and downstream vane was well captured in the numerical analysis.
C1 [Ooten, Michael K.; Anthony, Richard J.; Lethander, Andrew T.; Clark, John P.] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Ooten, MK (reprint author), Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
EM michael.ooten@us.af.mil
NR 24
TC 0
Z9 0
U1 2
U2 2
PU ASME
PI NEW YORK
PA TWO PARK AVE, NEW YORK, NY 10016-5990 USA
SN 0889-504X
EI 1528-8900
J9 J TURBOMACH
JI J. Turbomach.-Trans. ASME
PD JUN
PY 2016
VL 138
IS 6
AR 061004
DI 10.1115/1.4032284
PG 13
WC Engineering, Mechanical
SC Engineering
GA DK6SD
UT WOS:000375054600004
ER
PT J
AU Deas, DE
Moritz, AJ
Sagun, RS
Gruwell, SF
Powell, CA
AF Deas, David E.
Moritz, Alan J.
Sagun, Ruben S., Jr.
Gruwell, Scott F.
Powell, Charles A.
TI Scaling and root planing vs. conservative surgery in the treatment of
chronic periodontitis
SO PERIODONTOLOGY 2000
LA English
DT Review
ID DEBRIDEMENT FLAP PROCEDURES; MODIFIED WIDMAN PROCEDURES; LONG-TERM
EVALUATION; ATTACHMENT PROCEDURE; TOOTH LOSS; PLAQUE CONTROL; HISTOLOGIC
EVALUATION; SUBGINGIVAL PLAQUE; SURGICAL-TREATMENT; REFERRAL PATTERNS
AB A renewed interest in conservative surgical techniques has been fueled by new technology, changes in referral patterns to periodontists and a desire to achieve periodontal health in the least invasive, most cost-efficient manner possible. Trends suggest that an increasing amount of periodontal care is being provided in the offices of general dentists. If true, it is likely that patients receiving care in these offices will be offered simpler surgical treatment modalities that do not require an extensive armamentarium. The purpose of this article was to review the effectiveness of six relatively simple surgical techniques - gingivectomy, flap debridement, modified Widman flap, excisional new attachment procedure, modified excisional new attachment procedure and laser-assisted new attachment procedure - and to compare the results obtained using these procedures with the well-known clinical benefits of scaling and root planing. The intent was to determine whether the benefits of surgical procedures in the hands of most general dentists extend beyond those of conventional nonsurgical therapy.
C1 [Deas, David E.] Univ Texas Hlth Sci Ctr San Antonio, Sch Dent, Dept Periodont, San Antonio, TX 78229 USA.
[Moritz, Alan J.; Sagun, Ruben S., Jr.] US Air Force, Periodont Residency, Joint Base San Antonio L, TX USA.
[Powell, Charles A.] Univ Colorado, Sch Dent Med, Dept Surg Dent, Div Periodont, Denver, CO 80202 USA.
RP Deas, DE (reprint author), Univ Texas Hlth Sci Ctr San Antonio, Sch Dent, Dept Periodont, San Antonio, TX 78229 USA.
NR 87
TC 2
Z9 2
U1 5
U2 12
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0906-6713
EI 1600-0757
J9 PERIODONTOL 2000
JI Periodontol. 2000
PD JUN
PY 2016
VL 71
IS 1
BP 128
EP 139
DI 10.1111/prd.12114
PG 12
WC Dentistry, Oral Surgery & Medicine
SC Dentistry, Oral Surgery & Medicine
GA DJ0XU
UT WOS:000373928500008
PM 27045434
ER
PT J
AU Chidambaram, LM
Madria, SK
Linderman, M
AF Chidambaram, Lekshmi M.
Madria, Sanjay K.
Linderman, Mark
TI MELOC-X: extended memory and location optimized caching for large mobile
ad hoc networks of UAVs
SO DISTRIBUTED AND PARALLEL DATABASES
LA English
DT Article
DE Caching; Cache location; Mobile ad hoc networks; Availability; UAV
network
AB Effective caching in mobile ad hoc network increases data availability. However, caching at strategic locations with reduced (controlled) number of copies is needed for many military applications involving UAVs to address security concerns, less maintenance overhead and maintaining availability. In general, existing cooperative caching approaches are deficient in finding the reduced number of strategic cache locations. One such technique to reduce the number of strategic cache locations without affecting the efficacy of data access for a small network topology of UAVs is called "memory and location optimized caching scheme (MELOC)". However, having a single broker and metadata broadcast across the whole network in MELOC lead to severe performance hindrance in case of a large network topology of UAVs. Moreover, frequent cache replacements due to a change in network topology do not favor cache hit and bandwidth conservation in case of large mobile networks consisting of UAVs. In this paper, we design and evaluate an extended version of "MELOC called MELOC-X", which suits large network topologies of UAVs by overcoming the above challenges. Our comparison with one such recent scheme with similar objectives showcased a significant improvement in performance. We also evaluate the impact of this scheme with respect to different metrics including the average number of hops, the average roundtrip time (i.e., average query latency), cache hits and mobility to access cached data through extensive simulations.
C1 [Chidambaram, Lekshmi M.; Madria, Sanjay K.] Missouri Univ Sci & Technol, Dept Comp Sci, Rome, MO USA.
[Linderman, Mark] US Air Force, Res Lab, Rome, NY USA.
RP Madria, SK (reprint author), Missouri Univ Sci & Technol, Dept Comp Sci, Rome, MO USA.
EM lcvh8@mst.edu; madrias@mst.edu; mark.linderman@rl.af.mil
NR 23
TC 0
Z9 0
U1 2
U2 13
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0926-8782
EI 1573-7578
J9 DISTRIB PARALLEL DAT
JI Distrib. Parallel Databases
PD JUN
PY 2016
VL 34
IS 2
BP 217
EP 258
DI 10.1007/s10619-015-7181-2
PG 42
WC Computer Science, Information Systems; Computer Science, Theory &
Methods
SC Computer Science
GA DH7YI
UT WOS:000373009700004
ER
PT J
AU Jones, T
Gonzalez, LP
Guha, S
Sheng, Q
AF Jones, Tiffany
Gonzalez, Leonel P.
Guha, Shekhar
Sheng, Qin
TI A continuing exploration of a decomposed compact method for highly
oscillatory wave problems
SO JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS
LA English
DT Article
DE Paraxial wave equation; Radial symmetry; High oscillations; Compact
algorithm; Decompositions; Stability
ID BEAM; APPROXIMATION
AB This paper concerns a highly effective and decomposed compact scheme for solving a highly oscillatory paraxial Helmholtz problem in radially symmetric fields. The decomposition is utilized in the transverse direction to eliminate the singularity of the differential equation in polar coordinates. Numerical stability of the splitting scheme is investigated. It is shown that the numerical method introduced is not only highly accurate and efficient due to its straightforward algorithmic structure, but also stable under reasonable constraints for practical applications. Computational examples are presented to illustrate our conclusions. (C) 2015 Elsevier B.V. All rights reserved.
C1 [Jones, Tiffany; Sheng, Qin] Baylor Univ, Dept Math, 1 Bear Pl, Waco, TX 76798 USA.
[Jones, Tiffany; Sheng, Qin] Baylor Univ, Ctr Astrophys Space Phys & Engn Res, 1 Bear Pl, Waco, TX 76798 USA.
[Gonzalez, Leonel P.; Guha, Shekhar] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Jones, T (reprint author), Baylor Univ, Dept Math, 1 Bear Pl, Waco, TX 76798 USA.; Jones, T (reprint author), Baylor Univ, Ctr Astrophys Space Phys & Engn Res, 1 Bear Pl, Waco, TX 76798 USA.
EM Tiffany_Jones1@baylor.edu
FU U.S. Air Force Research Laboratory [FA-8650-11-D-5400]
FX The fourth author is supported in part by a research grant (No.
FA-8650-11-D-5400) from the U.S. Air Force Research Laboratory.
NR 19
TC 1
Z9 1
U1 1
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0377-0427
EI 1879-1778
J9 J COMPUT APPL MATH
JI J. Comput. Appl. Math.
PD JUN
PY 2016
VL 299
BP 207
EP 220
DI 10.1016/j.cam.2015.11.044
PG 14
WC Mathematics, Applied
SC Mathematics
GA DD7KD
UT WOS:000370102300015
ER
PT J
AU Hope, DA
Jefferies, SM
Hart, M
Nagy, JG
AF Hope, Douglas A.
Jefferies, Stuart M.
Hart, Michael
Nagy, James G.
TI High-resolution speckle imaging through strong atmospheric turbulence
SO OPTICS EXPRESS
LA English
DT Article
ID MULTIFRAME BLIND DECONVOLUTION; ASTRONOMICAL IMAGES; RESTORATION;
ALGORITHM; PHASE; NOISE; LONG
AB We demonstrate that high-resolution imaging through strong atmospheric turbulence can be achieved by acquiring data with a system that captures short exposure ("speckle") images using a range of aperture sizes and then using a bootstrap multi-frame blind deconvolution restoration process that starts with the smallest aperture data. Our results suggest a potential paradigm shift in how we image through atmospheric turbulence. No longer should image acquisition and post processing be treated as two independent processes: they should be considered as intimately related. (C) 2016 Optical Society of America
C1 [Hope, Douglas A.] US Air Force Acad, Ctr Space Situat Awareness Res, Colorado Springs, CO 80848 USA.
[Jefferies, Stuart M.] Georgia State Univ, Dept Phys & Astron, Atlanta, GA 30303 USA.
[Jefferies, Stuart M.; Hart, Michael] Univ Hawaii, Inst Astron, 34 Ohia Ku St, Pukalani, HI 96768 USA.
[Jefferies, Stuart M.] Univ Arizona, Steward Observ, 933 N Cherry Ave, Tucson, AZ 85721 USA.
[Hart, Michael] Univ Arizona, Coll Opt Sci, 1630 E Univ Blvd, Tucson, AZ 85721 USA.
[Nagy, James G.] Emory Univ, Dept Math & Comp Sci, Atlanta, GA 30322 USA.
RP Hope, DA (reprint author), US Air Force Acad, Ctr Space Situat Awareness Res, Colorado Springs, CO 80848 USA.
EM Douglas.Hope@usafa.edu
FU Air Force Office of Scientific Research [FA9550-09-0216,
FA9550-14-1-0178]
FX We thank Sergei Vorontsov for discussions about this work, and our
anonymous referees for useful suggestions to improve an earlier version
of this paper. The Air Force Office of Scientific Research funded this
work through contracts FA9550-09-0216 and FA9550-14-1-0178.
NR 23
TC 1
Z9 1
U1 0
U2 1
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1094-4087
J9 OPT EXPRESS
JI Opt. Express
PD MAY 30
PY 2016
VL 24
IS 11
BP 2116
EP 2129
DI 10.1364/OE.24.012116
PG 14
WC Optics
SC Optics
GA DO0KM
UT WOS:000377467800074
PM 27410132
ER
PT J
AU Wiens, JP
Shuman, NS
Miller, TM
Viggiano, AA
AF Wiens, Justin P.
Shuman, Nicholas S.
Miller, Thomas M.
Viggiano, Albert A.
TI Mutual neutralization of He+ with the anions Cl-, Br-, I-, and SF6-
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID ION-ION RECOMBINATION; FLOWING AFTERGLOW; CROSS-SECTIONS; KINETICS;
RATES; AR+
AB Mutual neutralization (MN) rate coefficients k(MN) for He+ with the anions Cl-, Br-, I-, and SF6- are reported from 300 to 500 K. The measured rate coefficients may contain a contribution from transfer ionization, i.e., double ionization of the anion. The large rate coefficient for He+ + SF6- (2.4 x 10(-7) cm(3) s(-1) at 300 K) is consistent with earlier polyatomic MN results found to have a reduced mass dependence of mu(-1/2). Neutralization of He+ by the atomic halides follows the trend observed earlier for Ne+, Ar+, Kr+, and Xe+ neutralized by atomic halides, k(MN) (Cl-) < k(MN) (Br-) < k(MN) (I-). Only an upper limit could be measured for the neutralization of He+ by Cl-. Predictions of the rate coefficients from a previously proposed simple model of atomic-atomic MN results are consistent with the present He+-halide rate coefficients. The temperature dependences are modestly negative for Br- and I-, while that for SF6- is small or negligible.
C1 [Wiens, Justin P.; Shuman, Nicholas S.; Miller, Thomas M.; Viggiano, Albert A.] Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
RP Viggiano, AA (reprint author), Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
EM albert.viggiano@us.af.mil
FU Air Force Office of Scientific Research [AFOSR-2303EP]; Institute for
Scientific Research of Boston College [FA9453-10-C-0206]
FX The work was supported by the Air Force Office of Scientific Research
(Grant No. AFOSR-2303EP). J.P.W. and T.M.M. acknowledge the support from
the Institute for Scientific Research of Boston College under Contract
No. FA9453-10-C-0206.
NR 25
TC 1
Z9 1
U1 0
U2 3
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-9606
EI 1089-7690
J9 J CHEM PHYS
JI J. Chem. Phys.
PD MAY 28
PY 2016
VL 144
IS 20
AR 204309
DI 10.1063/1.4948637
PG 5
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA DO3WI
UT WOS:000377712700038
PM 27250308
ER
PT J
AU Weinzierl, M
Yeates, AR
Mackay, DH
Henney, CJ
Arge, CN
AF Weinzierl, Marion
Yeates, Anthony R.
Mackay, Duncan H.
Henney, Carl J.
Arge, C. Nick
TI A NEW TECHNIQUE FOR THE PHOTOSPHERIC DRIVING OF NON-POTENTIAL SOLAR
CORONAL MAGNETIC FIELD SIMULATIONS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE magnetohydrodynamics (MHD); Sun: corona; Sun: coronal mass ejections
(CMEs); Sun: magnetic fields
ID ESTIMATING ELECTRIC-FIELDS; FLUX TRANSPORT MODEL; LARGE-SCALE CORONA;
HELICITY CONDENSATION; DOPPLER MEASUREMENTS; HEMISPHERIC PATTERN;
EVOLUTION; CHIRALITY; MAGNETOGRAMS; FILAMENTS
AB In this paper, we develop a new technique for driving global non-potential simulations of the Sun's coronal magnetic field solely from sequences of radial magnetic maps of the solar photosphere. A primary challenge to driving such global simulations is that the required horizontal electric field cannot be uniquely determined from such maps. We show that an "inductive" electric field solution similar to that used by previous authors successfully reproduces specific features of the coronal field evolution in both single and multiple bipole simulations. For these cases, the true solution is known because the electric field was generated from a surface flux-transport model. The match for these cases is further improved by including the non-inductive electric field contribution from surface differential rotation. Then, using this reconstruction method for the electric field, we show that a coronal non-potential simulation can be successfully driven from a sequence of ADAPT maps of the photospheric radial field, without including additional physical observations which are not routinely available.
C1 [Weinzierl, Marion; Yeates, Anthony R.] Univ Durham, Dept Math Sci, South Rd, Durham DH1 3LE, England.
[Mackay, Duncan H.] Univ St Andrews, Sch Math & Stat, St Andrews KY16 9SS, Fife, Scotland.
[Henney, Carl J.; Arge, C. Nick] US Air Force, Res Lab, Space Vehicles Directorate, 3550 Aberdeen Ave SE, Kirtland AFB, NM USA.
RP Weinzierl, M (reprint author), Univ Durham, Dept Math Sci, South Rd, Durham DH1 3LE, England.
EM marion.weinzierl@durham.ac.uk
OI Weinzierl, Marion/0000-0002-2302-5476
FU US Air Force Office of Scientific Research (AFOSR) in the AFOSR Basic
Research Initiative; Leverhulme Trust; UK STFC; AFRL; AFOSR
FX This work is supported by a grant from the US Air Force Office of
Scientific Research (AFOSR) in the AFOSR Basic Research Initiative
"Understanding the Interaction of CMEs with the Solar-Terrestrial
Environment." D.H.M. would like to thank the Leverhulme Trust and the UK
STFC for financial support.; The work utilizes data produced
collaboratively between Air Force Research Laboratory (AFRL) and the
National Solar Observatory (NSO). The ADAPT model development is
supported by AFRL and AFOSR. The input data utilized by ADAPT are
obtained by NSO/NISP (NSO Integrated Synoptic Program). NSO is operated
by the Association of Universities for Research in Astronomy (AURA),
Inc., under a cooperative agreement with the National Science Foundation
(NSF).
NR 42
TC 3
Z9 3
U1 0
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
EI 1538-4357
J9 ASTROPHYS J
JI Astrophys. J.
PD MAY 20
PY 2016
VL 823
IS 1
AR 55
DI 10.3847/0004-637X/823/1/55
PG 16
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA DN6WD
UT WOS:000377216300055
ER
PT J
AU Nehmetallah, G
Khoury, J
Banerjee, PP
AF Nehmetallah, G.
Khoury, J.
Banerjee, P. P.
TI Photorefractive two-beam coupling joint transform correlator: modeling
and performance evaluation
SO APPLIED OPTICS
LA English
DT Article
ID SYNTHETIC DISCRIMINANT FUNCTIONS; PHASE-ONLY FILTERS;
PATTERN-RECOGNITION; INCOHERENT-ERASURE; TARGET RECOGNITION; POLYMERS;
FIELDS
AB The photorefractive two-beam coupling joint transform correlator combines two features. The first is embedded semi-adaptive optimality, which weighs the correlation against clutter and noise in the input, and the second is the intrinsic dynamic range compression nonlinearity, which improves several metrics simultaneously without metric trade-off. Although the two beam coupling correlator was invented many years ago, its outstanding performance was recognized on only relatively simple images. There was no study about the performance of this correlator on complicated images and using different figures of merit. In this paper, the study is extended to more complicated images. For the first time, to our knowledge, we demonstrate simultaneous improvement in metrics performance without metric trade-off. The performance was evaluated compared to the classical joint transform correlator. A typical experimental result to validate the simulation results was also shown in this work. The best performing operation parameters were identified to guide the experimental work and for future comparison with other well-known optimal correlation filters. (C) 2016 Optical Society of America
C1 [Nehmetallah, G.] Catholic Univ Amer, EECS Dept, Washington, DC 20064 USA.
[Khoury, J.] Air Force Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
[Banerjee, P. P.] Univ Dayton, Electroopt Program, Dayton, OH 45469 USA.
RP Nehmetallah, G (reprint author), Catholic Univ Amer, EECS Dept, Washington, DC 20064 USA.
EM nehmetallah@cua.edu
FU Air Force Research Lab (AFRL) [FA8650-13-C-1529, FA8650-13-C-1531]
FX Air Force Research Lab (AFRL) (FA8650-13-C-1529, FA8650-13-C-1531).
NR 44
TC 1
Z9 1
U1 7
U2 7
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1559-128X
EI 2155-3165
J9 APPL OPTICS
JI Appl. Optics
PD MAY 20
PY 2016
VL 55
IS 15
BP 4011
EP 4023
DI 10.1364/AO.55.004011
PG 13
WC Optics
SC Optics
GA DM5IS
UT WOS:000376382300017
PM 27411127
ER
PT J
AU Hartl, DJ
Frank, GJ
Baur, JW
AF Hartl, Darren J.
Frank, Geoffrey J.
Baur, Jeffery W.
TI Effects of microchannels on the mechanical performance of
multifunctional composite laminates with unidirectional laminae
SO COMPOSITE STRUCTURES
LA English
DT Article
DE Composites; Microvascular; Multifunctional; Damage; Design; Finite
element method
ID FINITE-ELEMENT-ANALYSIS; FIBER-REINFORCED COMPOSITES; MENDABLE
COMPOSITES; ELASTIC PROPERTIES; FATIGUE FAILURE; DAMAGE; POLYMERS;
TENSILE
AB The development of multifunctional composite structures enabled by embedded microvascular networks offers the potential for significant increases in functionality. The addition of active thermal management capability, self-healing, or electromagnetic configurability to a structural composite is attractive. However, the tradeoffs between mechanical performance and extended functionalities remain relatively ill-quantified. Previous studies of the effects of embedded microchannels on structural capability have considered a small number of loading conditions and layups not typically used in aerospace structures. This computational work provides comprehensive structural design guidance by quantifying the negative mechanical effects of parallel and periodic microchannels in aerospace composites, where the results are synthesized from a comprehensive set of analyses performed via rigorous implementation of widely accepted modeling methods. The impacts of channel orientation, spacing, and channel cross-sectional aspect ratio are all quantified for laminate sequences typical of those used in aerospace structures. (C) 2016 Elsevier Ltd. All rights reserved.
C1 [Hartl, Darren J.; Baur, Jeffery W.] Air Force Res Lab, Mat & Mfg Directorate, AFRL RX, Wright Patterson AFB, OH 45433 USA.
[Hartl, Darren J.] Univ Technol Corp, Beavercreek, OH 45424 USA.
[Frank, Geoffrey J.] Univ Dayton, Res Inst, 300 Coll Pk, Dayton, OH 45469 USA.
RP Hartl, DJ (reprint author), Air Force Res Lab, Mat & Mfg Directorate, AFRL RX, Wright Patterson AFB, OH 45433 USA.
EM darren.hartl.ctr@us.af.mil
FU Commander Research and Development Fund of the United States Air Force
Research Laboratory
FX This work was supported by the Commander Research and Development Fund
of the United States Air Force Research Laboratory.
NR 40
TC 2
Z9 2
U1 5
U2 16
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0263-8223
EI 1879-1085
J9 COMPOS STRUCT
JI Compos. Struct.
PD MAY 20
PY 2016
VL 143
BP 242
EP 254
DI 10.1016/j.compstruct.2016.01.106
PG 13
WC Materials Science, Composites
SC Materials Science
GA DH3GK
UT WOS:000372675300021
ER
PT J
AU Knauer, KM
Jennings, AR
Bristol, AN
Iacono, ST
Morgan, SE
AF Knauer, Katrina M.
Jennings, Abby R.
Bristol, Ashleigh N.
Iacono, Scott T.
Morgan, Sarah E.
TI Enhanced Surface Properties of Branched Poly(ether sulfone) from
Semifluorinated Polyhedral Oligomeric Silsequioxanes
SO ACS APPLIED MATERIALS & INTERFACES
LA English
DT Article
DE poly(ether sulfone); fluorinated polyhedral oligomeric silsesquioxane;
surface properties; neutron reflectivity; AFM
ID CHAIN-END SEGREGATION; FACILE SYNTHESIS; FILMS; NANOCOMPOSITES; POLYMER;
POSS; OCTAFLUOROCYCLOPENTENE; SILSESQUIOXANES; NANOSTRUCTURES;
COPOLYMERS
AB Hybrid systems in which poly(ether sulfone) (PESU) chains are grafted to semifluorinated polyhedral oligomeric silsesquioxane (FOSS) cores are expected to integrate the advantages of both fluoropolymers and FOSS into the polymer system to yield excellent surface properties. For that purpose, we synthesized a novel octa-functional perfluorocyclopentenyl-POSS (PFCP-FOSS), which was used as a "core" grafting point. Commercial PESU was successfully grafted to PFCP-POSS via the nucleophilic addition elimination reaction between the phenolic chain ends and reactive PFCP moieties to yield a hybrid branched polymer possessing a semifluorinated FOSS core. X-ray photoelectron spectroscopy, neutron reflectivity, and atomic force microscopy indicated that the preparation of nanostructured polymer surfaces occurs by, migration of the low surface energy components (PFCP-POSS molecules), while FOSS aggregation is suppressed by covalent attachment to the long PESU chains. The resulting PFCP-POSS modified PESU films were highly transparent and yielded hydrophobic surfaces with low surface energy and high modulus for potential applications in high performance coatings and composites.
C1 [Knauer, Katrina M.; Bristol, Ashleigh N.; Morgan, Sarah E.] Univ So Mississippi, Sch Polymers & High Performance Mat, 118 Coll Dr 5050, Hattiesburg, MS 39406 USA.
[Jennings, Abby R.; Iacono, Scott T.] US Air Force Acad, Dept Chem, 2355 Fairchild Dr Suit 2N225, Colorado Springs, CO 80840 USA.
[Jennings, Abby R.; Iacono, Scott T.] Chem Res Ctr, 2355 Fairchild Dr Suit 2N225, Colorado Springs, CO 80840 USA.
RP Morgan, SE (reprint author), Univ So Mississippi, Sch Polymers & High Performance Mat, 118 Coll Dr 5050, Hattiesburg, MS 39406 USA.
EM sarah.morgan@usm.edu
FU Department of Education Graduate Assistance in Areas of National Need
(GAANN) Fellowship [P200A120118]; National Science Foundation's
Experimental Program to Stimulate Competitive Research (EPSCoR)
[IIA1430364]; Air Force Office of Scientific Research, Air Force
Research Laboratory; National Research Council (NRC)
FX This work was supported primarily by the Department of Education
Graduate Assistance in Areas of National Need (GAANN) Fellowship Award
#P200A120118. Partial funding was provided by the National Science
Foundation's Experimental Program to Stimulate Competitive Research
(EPSCoR) under Cooperative Agreement No. IIA1430364, and the Air Force
Office of Scientific Research, Air Force Research Laboratory. We thank
Solvay Specialty Polymers for donation of materials and useful
discussion. Special thanks should also be given to Oak Ridge National
Laboratories (ORNL) and Dr. John Ankner and Candice Halbert for their
exceptional assistance with NR instrumentation and data analysis. We
also thank the University of Alabama and Rob Holler for their assistance
with XPS instrumentation and Jessica Douglas for her assistance with SEM
and EDAX analysis. A.R.J. was supported through the National Research
Council (NRC) Post-Doctoral Research Associate Program. 29Si
NMR was kindly provided by Prof. David Y. Son at Southern Methodist
University.
NR 49
TC 2
Z9 2
U1 17
U2 28
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1944-8244
J9 ACS APPL MATER INTER
JI ACS Appl. Mater. Interfaces
PD MAY 18
PY 2016
VL 8
IS 19
BP 12434
EP 12444
DI 10.1021/acsami.6b01936
PG 11
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
SC Science & Technology - Other Topics; Materials Science
GA DM4QC
UT WOS:000376330800061
PM 27096284
ER
PT J
AU Brawley, KK
Davis, TA
AF Brawley, Kayla K.
Davis, Todd A.
TI Lewis base catalyzed trialkylsilylcyanide additions to cyclic
2-fluoroketones: nucleophile directed access to both cis- and
trans-stereoisomers
SO TETRAHEDRON LETTERS
LA English
DT Article
DE Fluorine; Lewis base catalysis; Stereoselective synthesis
ID ASYMMETRIC CYANOSILYLATION; ALPHA-FLUORINATION; STRECKER REACTION;
MEDICINAL CHEMISTRY; BETA-FLUOROAMINES; KETONES; ALDEHYDES; BOND;
SILYLATION; FLUOROKETONES
AB An efficient method for the Lewis base-catalyzed addition of trialkylorganosilanes (TMSCN & TBSCN) to cyclic 2-fluoroketones has been developed producing the TMS- or TBS-protected cyanohydrins in good yields and diastereoselectivity. The Lewis base, solvent, and trialkylorganosilane have a dramatic effect on the reaction time and stereoselectivity for these reactions. TMSCN reacted the fastest using DIPEA as the Lewis base, and favored the cis product (up to 22:1), whereas methoxide-catalyzed reactions with TBSCN yielded the trans stereoisomer (up to 18:1). Published by Elsevier Ltd.
C1 [Brawley, Kayla K.; Davis, Todd A.] Idaho State Univ, Dept Chem, Campus Box 8023, Pocatello, ID 83201 USA.
[Davis, Todd A.] US Air Force Acad, Dept Chem, Colorado Springs, CO 80840 USA.
RP Davis, TA (reprint author), Idaho State Univ, Dept Chem, Campus Box 8023, Pocatello, ID 83201 USA.; Davis, TA (reprint author), US Air Force Acad, Dept Chem, Colorado Springs, CO 80840 USA.
EM todd.davis@usafa.edu
FU Petroleum Research Fund of the American Chemical Society [51369-UR1];
Air Force Office of Scientific Research
FX This project was supported by the Petroleum Research Fund of the
American Chemical Society (PRF# 51369-UR1) and the Air Force Office of
Scientific Research. Authors would like to acknowledge Dr's Karl De
Jesus, Abby Jennings, and Timm Knoerzer for insightful comments. This
manuscript is dedicated to the memory of Professor Dennis P. Strommen
(Idaho State University), a true undergraduate mentor and friend.
NR 49
TC 0
Z9 0
U1 4
U2 11
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0040-4039
J9 TETRAHEDRON LETT
JI Tetrahedron Lett.
PD MAY 18
PY 2016
VL 57
IS 20
BP 2161
EP 2164
DI 10.1016/j.tetlet.2016.03.112
PG 4
WC Chemistry, Organic
SC Chemistry
GA DL6GR
UT WOS:000375738200006
ER
PT J
AU Bannow, LC
Rubel, O
Badescu, SC
Rosenow, P
Hader, J
Moloney, JV
Tonner, R
Koch, SW
AF Bannow, Lars C.
Rubel, Oleg
Badescu, Stefan C.
Rosenow, Phil
Hader, Jorg
Moloney, Jerome V.
Tonner, Ralf
Koch, Stephan W.
TI Configuration dependence of band-gap narrowing and localization in
dilute GaAs1-xBix alloys
SO PHYSICAL REVIEW B
LA English
DT Article
ID INITIO MOLECULAR-DYNAMICS; TOTAL-ENERGY CALCULATIONS; QUASI-RANDOM
STRUCTURES; AUGMENTED-WAVE METHOD; ELECTRONIC-STRUCTURE; BEAM EPITAXY;
LASER-DIODES; BASIS-SET; SEMICONDUCTORS; POINTS
AB Anion substitution with bismuth (Bi) in III-V semiconductors is an effective method for experimental engineering of the band gap E-g at low Bi concentrations (<= 2%), in particular in gallium arsenide (GaAs). The inverse Bi-concentration dependence of E-g has been found to be linear at low concentrations x and dominated by a valence band defect level anticrossing between As and Bi occupied p levels. Predictive models for the valence band hybridization require a first-principle understanding which can be obtained by density functional theory with the main challenges being the proper description of E-g and the spin-orbit coupling. By using an efficient method to include these effects, it is shown here that at high concentrations E-g is modified mainly by a Bi-Bi p orbital interaction and by the large Bi atom-induced strain. In particular, we find that at high concentrations, the Bi-Bi interactions depend strongly on model periodic cluster configurations, which are not captured by tight-binding models. Averaging over various configurations supports the defect level broadening picture. This points to the role of different atomic configurations obtained by varying the experimental growth conditions in engineering arsenide band gaps, in particular for telecommunication laser technology.
C1 [Bannow, Lars C.; Koch, Stephan W.] Univ Marburg, Dept Phys, D-35032 Marburg, Germany.
[Bannow, Lars C.; Koch, Stephan W.] Univ Marburg, Ctr Mat Sci, D-35032 Marburg, Germany.
[Rubel, Oleg] McMaster Univ, Dept Mat Sci & Engn, Hamilton, ON L8S 4L8, Canada.
[Badescu, Stefan C.] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Rosenow, Phil; Tonner, Ralf] Univ Marburg, Dept Chem, D-35032 Marburg, Germany.
[Hader, Jorg; Moloney, Jerome V.] NLCSTR Inc, 7040 N Montecatina Dr, Tucson, AZ 85704 USA.
RP Bannow, LC (reprint author), Univ Marburg, Dept Phys, D-35032 Marburg, Germany.; Bannow, LC (reprint author), Univ Marburg, Ctr Mat Sci, D-35032 Marburg, Germany.
EM lars.bannow@physik.uni-marburg.de
RI Tonner, Ralf/A-7420-2008;
OI Tonner, Ralf/0000-0002-6759-8559; Bannow, Lars/0000-0002-1379-6242
FU DFG [GRK 1782]; Natural Sciences and Engineering Research Council of
Canada [RGPIN-2015-04518]; Air Force Office of Scientific Research under
the STTR Phase II Grant [FA9550-16-C-0021]; AFOSR; High Performance
Computing network of the Department of Defense
FX The Marburg part of the work was funded by the DFG via the GRK 1782
"Functionalization of Semiconductors"; computing time from HRZ Marburg,
CSC Frankfurt, and HLRS Stuttgart is acknowledged. O.R. would like to
acknowledge funding provided by the Natural Sciences and Engineering
Research Council of Canada under the Discovery Grant Program No.
RGPIN-2015-04518. The work at NLCSTR was supported by the Air Force
Office of Scientific Research under the STTR Phase II Grant No.
FA9550-16-C-0021. The work of S.C.B. was supported by the AFOSR and by
the High Performance Computing network of the Department of Defense.
NR 74
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PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9950
EI 2469-9969
J9 PHYS REV B
JI Phys. Rev. B
PD MAY 16
PY 2016
VL 93
IS 20
AR 205202
DI 10.1103/PhysRevB.93.205202
PG 10
WC Physics, Condensed Matter
SC Physics
GA DM3ML
UT WOS:000376250400008
ER
PT J
AU Matters, DA
Lerch, AG
Hurst, AM
Szentmiklosi, L
Carroll, JJ
Detwiler, B
Revay, Z
McClory, JW
McHale, SR
Firestone, RB
Sleaford, BW
Krticka, M
Belgya, T
AF Matters, D. A.
Lerch, A. G.
Hurst, A. M.
Szentmiklosi, L.
Carroll, J. J.
Detwiler, B.
Revay, Zs.
McClory, J. W.
McHale, S. R.
Firestone, R. B.
Sleaford, B. W.
Krticka, M.
Belgya, T.
TI Investigation of Re-186 via radiative thermal-neutron capture on Re-185
SO PHYSICAL REVIEW C
LA English
DT Article
ID GAMMA ACTIVATION-ANALYSIS; BUDAPEST RESEARCH REACTOR; CROSS-SECTIONS;
NUCLEAR-DATA; RESONANCES; STRENGTH; STANDARDIZATION; WIDTHS; PGAA
AB Partial gamma-ray production cross sections and the total radiative thermal-neutron capture cross section for the Re-185(n,gamma) Re-186 reaction were measured using the Prompt Gamma Activation Analysis facility at the Budapest Research Reactor with an enriched Re-185 target. The Re-186 cross sections were standardized using well-known Cl-35(n,gamma) Cl-36 cross sections from irradiation of a stoichiometric (ReCl3)-Re-nat target. The resulting cross sections for transitions feeding the Re-186 ground state from low-lying levels below a cutoff energy of E-c = 746 keV were combined with a modeled probability of ground-state feeding from levels above E-c to arrive at a total cross section of sigma(0) = 111(6) b for radiative thermal-neutron capture on Re-185. A comparison of modeled discrete-level populations with measured transition intensities led to proposed revisions for seven tentative spin-parity assignments in the adopted level scheme for Re-186. Additionally, 102 primary gamma rays were measured, including 50 previously unknown. A neutron-separation energy of S-n = 6179.59(5) keV was determined from a global least-squares fit of the measured gamma-ray energies to the known Re-186 decay scheme. The total capture cross section and separation energy results are comparable to earlier measurements of these values.
C1 [Matters, D. A.; McClory, J. W.] US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
[Lerch, A. G.; McHale, S. R.] Def Threat Reduct Agcy, Ft Belvoir, VA 22060 USA.
[Hurst, A. M.; Firestone, R. B.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Hurst, A. M.] Univ Calif Berkeley, Dept Nucl Engn, Berkeley, CA 94720 USA.
[Szentmiklosi, L.; Belgya, T.] Hungarian Acad Sci, Ctr Energy Res, H-1525 Budapest, Hungary.
[Carroll, J. J.] US Army Res Lab, Adelphi, MD 20783 USA.
[Detwiler, B.] Youngstown State Univ, Youngstown, OH 44555 USA.
[Revay, Zs.] Tech Univ Munich, Heinz Maier Leibnitz Zentrum MLZ 7, Garching, Germany.
[Sleaford, B. W.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Krticka, M.] Charles Univ Prague, Fac Math & Phys, CZ-18000 Prague, Czech Republic.
RP Matters, DA (reprint author), US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
EM david.a.matters.mil@mail.mil
RI Szentmiklosi, Laszlo/F-5362-2015
OI Szentmiklosi, Laszlo/0000-0001-7747-8545
FU Defense Threat Reduction Agency Grant [HDTRA1-08-1-0014]; University of
California - Office of Science, Office of Basic Energy Sciences, of the
US Department of Energy at the Lawrence Berkeley National Laboratory
[DE-AC02-05CH11231]; Office of Science, Office of Basic Energy Sciences,
of the US Department of Energy at Lawrence Livermore National Laboratory
[DE-AC52-07NA27344]; Domestic Nuclear Detection Office of the Department
of Homeland Security; NAP VENEUS08 grant [OMFB-00184/2006]; Czech
Science Foundation [13-07117S]
FX This work was initiated under Defense Threat Reduction Agency Grant No.
HDTRA1-08-1-0014 (YSU). Later work was performed under the auspices of
the University of California, supported by the Director, Office of
Science, Office of Basic Energy Sciences, of the US Department of Energy
at the Lawrence Berkeley National Laboratory under Contract No.
DE-AC02-05CH11231, and at Lawrence Livermore National Laboratory under
Contract No. DE-AC52-07NA27344. Additional funding was provided by the
Domestic Nuclear Detection Office of the Department of Homeland
Security. Access to the Budapest PGAA facility was financially supported
by the NAP VENEUS08 grant under Contract No. OMFB-00184/2006. This work
was also supported by the Czech Science Foundation under Grant No.
13-07117S. The authors gratefully acknowledge the support of the
operations staff at the Budapest Research Reactor. D.M. thanks Dr. C.J.
Chiara for help reviewing the manuscript.
NR 70
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PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9985
EI 2469-9993
J9 PHYS REV C
JI Phys. Rev. C
PD MAY 16
PY 2016
VL 93
IS 5
AR 054319
DI 10.1103/PhysRevC.93.054319
PG 19
WC Physics, Nuclear
SC Physics
GA DM3NN
UT WOS:000376253300001
ER
PT J
AU Jiang, NB
Halls, BR
Stauffer, HU
Danehy, PM
Gord, JR
Roy, S
AF Jiang, Naibo
Halls, Benjamin R.
Stauffer, Hans U.
Danehy, Paul M.
Gord, James R.
Roy, Sukesh
TI Selective two-photon absorptive resonance femtosecond-laser
electronic-excitation tagging velocimetry
SO OPTICS LETTERS
LA English
DT Article
ID PARTICLE-IMAGE VELOCIMETRY; VELOCITY-MEASUREMENTS; FLOWS; AIR
AB Selective two-photon absorptive resonance femtosecond-laser electronic-excitation tagging (STARFLEET), a nonseeded ultrafast-laser-based velocimetry technique, is demonstrated in reactive and nonreactive flows. STARFLEET is pumped via a two-photon resonance in N-2 using 202.25 nm 100 fs light. STARFLEET greatly reduces the per-pulse energy required (30 mu J/pulse) to generate the signature FLEET emission compared to the conventional FLEET technique (1.1 mJ/pulse). This reduction in laser energy results in less energy deposited in the flow, which allows for reduced flow perturbations (reactive and nonreactive), increased thermometric accuracy, and less severe damage to materials. Velocity measurements conducted in a free jet of N-2 and in a premixed flame show good agreement with theoretical velocities, and further demonstrate the significantly less intrusive nature of STARFLEET. (C) 2016 Optical Society of America
C1 [Jiang, Naibo; Stauffer, Hans U.; Roy, Sukesh] Spectral Energies LLC, 5100 Springfield St, Dayton, OH 45431 USA.
[Halls, Benjamin R.; Gord, James R.] Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
[Danehy, Paul M.] NASA, Langley Res Ctr, Adv Measurements & Data Syst Branch, Hampton, VA 23681 USA.
RP Jiang, NB (reprint author), Spectral Energies LLC, 5100 Springfield St, Dayton, OH 45431 USA.
EM naiboj@yahoo.com
FU National Aeronautics and Space Administration (NASA) [NNX14CL74P,
NNX15CL24C]; Air Force Office of Scientific Research (AFOSR) [14RQ06COR,
15RQCOR202]
FX National Aeronautics and Space Administration (NASA) (NNX14CL74P,
NNX15CL24C); Air Force Office of Scientific Research (AFOSR) (14RQ06COR,
15RQCOR202).
NR 22
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U1 5
U2 8
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0146-9592
EI 1539-4794
J9 OPT LETT
JI Opt. Lett.
PD MAY 15
PY 2016
VL 41
IS 10
BP 2225
EP 2228
DI 10.1364/OL.41.002225
PG 4
WC Optics
SC Optics
GA DL6KH
UT WOS:000375747600024
PM 27176968
ER
PT J
AU Hameed, JM
McCaffrey, RL
McCoy, A
Brannock, T
Martin, GJ
Scouten, WT
Brooks, K
Putnam, SD
Riddle, MS
AF Hameed, Jessica M.
McCaffrey, Ramona L.
McCoy, Andrea
Brannock, Tracy
Martin, Gregory J.
Scouten, William T.
Brooks, Krista
Putnam, Shannon D.
Riddle, Mark S.
TI Incidence, Etiology and Risk Factors for Travelers' Diarrhea during a
Hospital Ship-Based Military Humanitarian Mission: Continuing Promise
2011
SO PLOS ONE
LA English
DT Article
ID UNITED-STATES-NAVY; US MILITARY; CRUISE SHIP; PERSONNEL; DISEASE;
DEPLOYMENT; IDENTIFICATION; PREVENTION; INFECTION; OUTBREAKS
AB Travelers' diarrhea (TD) is the most common ailment affecting travelers, including deployed U.S. military. Continuing Promise 2011 was a 5-month humanitarian assistance/disaster response (HA/DR) military and non-governmental organization training mission aboard the hospital ship USNS Comfort, which deployed to Central and South America and the Caribbean between April and September 2011. Enhanced TD surveillance was undertaken during this mission for public health purposes. Passive surveillance (clinic visits), active surveillance (self-reported questionnaires), and stool samples were collected weekly from shipboard personnel. Descriptive statistics and multivariate-logistic regression methods were used to estimate disease burden and risk factor identification. Two polymerase chain reaction methods on frozen stool were used for microbiological identification. TD was the primary complaint for all clinic visits (20%) and the leading cause of lost duties days due to bed rest confinement (62%), though underreported, as the active self-reported incidence was 3.5 times higher than the passive clinic-reported incidence. Vomiting (p = 0.002), feeling lightheaded or weak (p = 0.005), and being a food handler (p = 0.017) were associated with increased odds of lost duty days. Thirty-eight percent of self-reported cases reported some amount of performance impact. Based on the epidemiological curve, country of exercise and liberty appeared to be temporally associated with increased risk. From the weekly self-reported questionnaire risk factor analysis, eating off ship in the prior week was strongly associated (adjusted odds ratio [OR] 2.4, p<0.001). Consumption of seafood increased risk (aOR 1.7, p = 0.03), though consumption of ice appeared protective (aOR 0.3, p = 0.01). Etiology was bacterial (48%), with enterotoxigenic Escherichia coli as the predominant pathogen (35%). Norovirus was identified as a sole pathogen in 12%, though found as a copathogen in an additional 6%. Despite employment of current and targeted preventive interventions, ship-board HA/DR missions may experience a significant risk for TD among deployed US military personnel and potentially impact mission success.
C1 [Hameed, Jessica M.; Riddle, Mark S.] Uniformed Serv Univ Hlth Sci, Dept Prevent Med & Biostat, Bethesda, MD 20814 USA.
[McCaffrey, Ramona L.; Brooks, Krista; Putnam, Shannon D.] Naval Hlth Res Ctr, Operat Infect Dis Dept, Enter Dis Surveillance Program, San Diego, CA USA.
[McCoy, Andrea; Riddle, Mark S.] Naval Med Res Ctr, Enter Dis Dept, Infect Dis Directorate, Silver Spring, MD USA.
[Brannock, Tracy] Air Force Global Strike Command, Barksdale AFB, LA USA.
[Martin, Gregory J.] Dept State, Washington, DC USA.
[Scouten, William T.] Naval Med Ctr Portsmouth, Portsmouth, VA USA.
[Putnam, Shannon D.] Yayasan Int Hlth Dev Fdn, Bali, Indonesia.
RP Riddle, MS (reprint author), Uniformed Serv Univ Hlth Sci, Dept Prevent Med & Biostat, Bethesda, MD 20814 USA.; Riddle, MS (reprint author), Naval Med Res Ctr, Enter Dis Dept, Infect Dis Directorate, Silver Spring, MD USA.
EM mark.s.riddle10.mil@mail.mil
FU Department of Defense Global Emerging Surveillance and Response Systems
[P0298_13_NM]
FX This work was completed as part of official duties while on mission
aboard the USNS Comfort during Continuing Promise 2011. Microbiological
assessment was supported by the Department of Defense Global Emerging
Surveillance and Response Systems under Project No. P0298_13_NM.
NR 30
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PU PUBLIC LIBRARY SCIENCE
PI SAN FRANCISCO
PA 1160 BATTERY STREET, STE 100, SAN FRANCISCO, CA 94111 USA
SN 1932-6203
J9 PLOS ONE
JI PLoS One
PD MAY 12
PY 2016
VL 11
IS 5
AR e0154830
DI 10.1371/journal.pone.0154830
PG 13
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA DM8CQ
UT WOS:000376588600071
PM 27171433
ER
PT J
AU Howland, GA
Knarr, SH
Schneeloch, J
Lum, DJ
Howell, JC
AF Howland, Gregory A.
Knarr, Samuel H.
Schneeloch, James
Lum, Daniel J.
Howell, John C.
TI Compressively Characterizing High-Dimensional Entangled States with
Complementary, Random Filtering
SO PHYSICAL REVIEW X
LA English
DT Article
ID QUANTUM; INFORMATION
AB The resources needed to conventionally characterize a quantum system are overwhelmingly large for high-dimensional systems. This obstacle may be overcome by abandoning traditional cornerstones of quantum measurement, such as general quantum states, strong projective measurement, and assumption-free characterization. Following this reasoning, we demonstrate an efficient technique for characterizing high-dimensional, spatial entanglement with one set of measurements. We recover sharp distributions with local, random filtering of the same ensemble in momentum followed by position-something the uncertainty principle forbids for projective measurements. Exploiting the expectation that entangled signals are highly correlated, we use fewer than 5000 measurements to characterize a 65,536-dimensional state. Finally, we use entropic inequalities to witness entanglement without a density matrix. Our method represents the sea change unfolding in quantum measurement, where methods influenced by the information theory and signal-processing communities replace unscalable, brute-force techniques-a progression previously followed by classical sensing.
C1 [Howland, Gregory A.; Knarr, Samuel H.; Schneeloch, James; Lum, Daniel J.; Howell, John C.] Univ Rochester, Dept Phys & Astron, 500 Wilson Blvd, Rochester, NY 14627 USA.
[Howland, Gregory A.; Schneeloch, James] Air Force Res Lab, 525 Brooks Rd, Rome, NY 13441 USA.
RP Howland, GA (reprint author), Univ Rochester, Dept Phys & Astron, 500 Wilson Blvd, Rochester, NY 14627 USA.; Howland, GA (reprint author), Air Force Res Lab, 525 Brooks Rd, Rome, NY 13441 USA.
EM gregory.howland.3@us.af.mil
FU Air Force Office of Scientific Research (AFOSR) [FA9550-13-1-0019, AFOSR
LRIR 14RI02COR]; National Research Council Research Associate Programs;
Northrup Grumman
FX This work was funded by Air Force Office of Scientific Research (AFOSR)
Grant No. FA9550-13-1-0019 and AFOSR LRIR 14RI02COR. G. A. H. and J. S.
acknowledge support from National Research Council Research Associate
Programs. J. C. H. acknowledges support from Northrup Grumman. Any
opinions, findings and conclusions or recommendations expressed in this
material are those of the author(s) and do not necessarily reflect the
views of AFRL. G. A. H. conceived of the experiment and authored the
manuscript with help from S. H. K., D. J. L., and J. S. S. H. K. and G.
A. H. performed the experiment and analyzed the data. J. S. provided the
theory on entanglement witnesses and Fourier transforms of random
patterns. D. J. L. devised the scheme for using Hadamard matrices in the
measurement and reconstruction process. The entire project was overseen
by J. C. H.
NR 55
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PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2160-3308
J9 PHYS REV X
JI Phys. Rev. X
PD MAY 12
PY 2016
VL 6
IS 2
AR 021018
DI 10.1103/PhysRevX.6.021018
PG 10
WC Physics, Multidisciplinary
SC Physics
GA DM0CU
UT WOS:000376011100001
ER
PT J
AU Wang, JS
Wai, CM
Brown, GJ
Apt, SD
AF Wang, Joanna S.
Wai, Chien M.
Brown, Gail J.
Apt, Scott D.
TI Two-Dimensional Nanoparticle Cluster Formation in Supercritical Fluid
CO2
SO LANGMUIR
LA English
DT Article
ID ORDERED ARRAYS; GOLD NANOPARTICLES; NANOSTRUCTURES; DEPOSITION;
TRANSITION; MONOLAYERS; DEVICES; FILMS; SIZE
AB Supercritical fluid carbon dioxide (sc-CO2) is capable of depositing nanoparticles in small structures of silicon, substrates because of its gas-like penetration, liquid-like solvation abilities, and near-zero surface tension. In nanometer-sized shallow wells on silicon-surface, formation of two-dimensional (2D) monolayer metal nanoparticle (NP) clusters can be achieved using the sc-CO2 deposition method. Nanoparticles tend to fill nanostructured holes first, and then, if sufficient nanoparticles are available, they will continue to cover the flat areas nearby, unless defects or other surface imperfections are available. In addition, SEM-images of two-dimensional gold (Au) nanoparticle clusters formed on a flat silicon surface with two to a dozen or more of the nanoparticles are provided to illustrate the patterns of nanoparticle cluster formation in sc-CO2.
C1 [Wang, Joanna S.; Brown, Gail J.; Apt, Scott D.] US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Wai, Chien M.] Univ Idaho, Dept Chem, Renfrew Hall, Moscow, ID 83844 USA.
RP Wang, JS (reprint author), US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM joanna.wang.ctr@us.af.mil
FU Air Force TOPS IV contract program [FA8650-11-D-5800]
FX This work is supported by Air Force TOPS IV contract program
(FA8650-11-D-5800).
NR 29
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U1 9
U2 14
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0743-7463
J9 LANGMUIR
JI Langmuir
PD MAY 10
PY 2016
VL 32
IS 18
BP 4635
EP 4642
DI 10.1021/acs.langmuir.6b01011
PG 8
WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science,
Multidisciplinary
SC Chemistry; Materials Science
GA DL7GN
UT WOS:000375809100028
PM 27088712
ER
PT J
AU Wang, DH
McKenzie, RN
Buskohl, PR
Vaia, RA
Tan, LS
AF Wang, David H.
McKenzie, Ruel N.
Buskohl, Philip R.
Vaia, Richard A.
Tan, Loon-Seng
TI Hygromorphic Polymers: Synthesis, Retro-Michael Reaction, and
Humidity-Driven Actuation of Ester-Sulfonyl Polyimides and Thermally
Derived Copolyimides
SO MACROMOLECULES
LA English
DT Article
ID AZOBENZENE-FUNCTIONALIZED POLYIMIDES; LIQUID-CRYSTALLINE POLYMER;
PHOTOMECHANICAL RESPONSE; POLYPYRROLE FILMS; SIDE-GROUPS; AROMATIC
POLYIMIDES; DIMETHYL SULFONE; WATER SORPTION; BEHAVIOR; GLASSY
AB With a view toward broadening the adaptive capability of polyimide-based systems that have been shown to be mechanically responsive to light, heat, and thermal-electrical stimuli, a simple diamine containing a highly polar ester-sulfonyl (ES) pendant was synthesized via a two-step route. It was polymerized with five common dianhydrides in N-methylpyrrolidinone to afford poly(amic acid), PAA, solutions, which were subsequently converted to a series of amorphous polyimides containing ester-sulfonyl (-CH2CH2SO2Me) pendants, generically designated as PI-ES, by either chemical imidization at room temperature in the same pot or heat treatment of PAA cast film at 175 degrees C. The chemically imidized polyimide films are tough and creasable, but the thermally imidized ones are brittle because.of much lower molecular weights (GPC results). In addition) a series of thermally derived copolymers designated as PI-ES:A, which contains ES and carboxylic acid (A) pendants, were prepared from PI-ES via a retro-Michael reaction at 250 degrees C, in which A was formed from ES pendant with the concomitant expulsion of vinyl methyl sulfone molecule. For various comparison purposes, the homopolymers, PI-A containing 100% A pendant and nonfunctional PI-N (i.e., without any stimuli-responders), were also prepared from their respective dianhydrido and diamino monomers. In addition to physical/mechanical characterization by FTIR, thermal analysis, WAXD, and DMA, the thin films of PI-ES, PI-A, and PI-ES:A have shown remarkable locomotion and beam-like oscillation under gradient (nonequilibrium) conditions created by humidity (or methanol vapor) while the PI-N, Ultem, and Nafion films were nonresponsive under the same conditions. While the state-of-the-art humidity-driven actuators have illustrated the innovative bilayer designs and clever utilization of responsive polymeric and nanocomposite systems, in which ionic moieties play the critical role in hosting the water molecules, this work shows that a simple, wholly covalent, and amorphous polymer in monolithic form can be hygromorphic and motile, and specifically this newly found humidity-gradient responsivity would enhance the functional versatility of polyimides.
C1 [Wang, David H.; McKenzie, Ruel N.; Buskohl, Philip R.; Vaia, Richard A.; Tan, Loon-Seng] US Air Force, Res Lab, Mat & Mfg Directorate, Funct Mat Div AFRL RXA, Wright Patterson AFB, OH 45433 USA.
[McKenzie, Ruel N.] Natl Res Council Fellowship Program, Washington, DC USA.
RP Tan, LS (reprint author), US Air Force, Res Lab, Mat & Mfg Directorate, Funct Mat Div AFRL RXA, Wright Patterson AFB, OH 45433 USA.
EM loon.tan@us.af.mil
RI Tan, Loon-Seng/F-6985-2012
OI Tan, Loon-Seng/0000-0002-2134-9290
FU Materials and Manufacturing Directorate (RX); Air Force Office of
Scientific Research (AFOSR)
FX This work was completed at Air Force Research Laboratory (AFRL) at
Wright-Patterson Air Force Base with funding support from Materials and
Manufacturing Directorate (RX) and Air Force Office of Scientific
Research (AFOSR). We are grateful to Prof. Lei Zhu (Case Western Reserve
University) for helpful discussions on the chemistry and dielectric
properties of methyl sulfone-containing polymers.
NR 73
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U1 20
U2 44
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0024-9297
EI 1520-5835
J9 MACROMOLECULES
JI Macromolecules
PD MAY 10
PY 2016
VL 49
IS 9
BP 3286
EP 3299
DI 10.1021/acs.macromol.6b00250
PG 14
WC Polymer Science
SC Polymer Science
GA DL7GT
UT WOS:000375809700009
ER
PT J
AU Putnam, SA
Fairchild, SB
Arends, AA
Urbas, AM
AF Putnam, Shawn A.
Fairchild, Steven B.
Arends, Armando A.
Urbas, Augustine M.
TI All-optical beam deflection method for simultaneous thermal conductivity
and thermo-optic coefficient (dn/dT) measurements
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID SPECTROSCOPY; LENS; GLASSES; LIGHT; TIME
AB This work describes an all-optical beam deflection method to simultaneously measure the thermal conductivity (Lambda) and thermo-optic coefficient (dn/dT) of materials that are absorbing at lambda = 10.6 mu m and are transparent to semi-transparent at lambda = 632.8 nm. The technique is based on the principle of measuring the beam deflection of a probe beam (632.8 nm) in the frequency-domain due to a spatially and temporally varying index gradient that is thermally induced by 50: 50 split pump beam from a CO2 laser (10.6 mu m). The technique and analysis methods are validated with measurements of 10 different optical materials having K and dn/dT properties ranging between 0.7W/m K <= K <= 33.5W/m K and -12 x 10(-6) K-1 less than or similar to dn/dT less than or similar to 14 x 10(-6) K-1, respectively. The described beam deflection technique is highly related to other well-established, all-optical materials characterization methods, namely, thermal lensing and photothermal deflection spectroscopy. Likewise, due to its all-optical, pump-probe nature, it is applicable to materials characterization in extreme environments with minimal errors due to black-body radiation. In addition, the measurement principle can be extended over a broad range of electromagnetic wavelengths (e.g., ultraviolet to THz) provided the required sources, detectors, and focusing elements are available. Published by AIP Publishing.
C1 [Putnam, Shawn A.; Arends, Armando A.] Univ Cent Florida, Dept Mech & Aerosp Engn, Orlando, FL 32816 USA.
[Fairchild, Steven B.; Urbas, Augustine M.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Putnam, SA (reprint author), Univ Cent Florida, Dept Mech & Aerosp Engn, Orlando, FL 32816 USA.
FU U.S. Air Force Summer Faculty Fellowship Program; Air Force Office of
Scientific Research
FX This work was supported by the 2015 U.S. Air Force Summer Faculty
Fellowship Program and the Air Force Office of Scientific Research.
NR 31
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U1 3
U2 5
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-8979
EI 1089-7550
J9 J APPL PHYS
JI J. Appl. Phys.
PD MAY 7
PY 2016
VL 119
IS 17
AR 173102
DI 10.1063/1.4948429
PG 6
WC Physics, Applied
SC Physics
GA DO3XS
UT WOS:000377716500002
ER
PT J
AU Ilyas, N
Butcher, DP
Durstock, MF
Tabor, CE
AF Ilyas, Nahid
Butcher, Dennis P.
Durstock, Michael F.
Tabor, Christopher E.
TI Ion Exchange Membranes as an Interfacial Medium to Facilitate Gallium
Liquid Metal Alloy Mobility
SO ADVANCED MATERIALS INTERFACES
LA English
DT Article
ID MAGNETIC-RESONANCE; ROOM-TEMPERATURE; EUTECTIC ALLOY; X-RAY; SURFACES;
ANTENNAS; INDIUM; MICROFLUIDICS; WATER; OXIDE
AB Liquid metal electronics represent a groundbreaking advancement in electronic reconfigurability. Replacing mercury with nontoxic gallium liquid metal alloys (GaLMAs) will provide a significant improvement toward this paradigm; however, the metallic residues left behind on surfaces that contact GaLMAs have prevented their broad application to date. This report describes a novel method to control the wetting characteristics of GaLMAs by utilizing an ion exchange membrane (IEM) as an interface material that gradually releases minute concentrations of HCl vapor which reacts with the GaLMA surface and thus prevents residue formation. A common IEM, Nafion, is shown to behave both as an effective HCl transport medium and as a source for HCl vapor, and the chemical and phenomenological interactions of Nafi on and HCl with GaLMA fluids are characterized. Additionally, an application of Nafi on toward GaLMA microfluidics is demonstrated by integrating commercially available extruded Nafi on tubes and by utilizing a solution suspension of Nafi on to coat an arbitrary silicone-based microfluidic matrix material. Both methods proved effective in generating a reversible flow system that remained residue free for extended periods of time, which can be regenerated without the use of concentrated acidic solutions.
C1 [Ilyas, Nahid; Durstock, Michael F.; Tabor, Christopher E.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Ilyas, Nahid] UES Inc, Dayton, OH 45432 USA.
[Butcher, Dennis P.] Air Force Off Sci Res, Int Off, Arlington, VA 22203 USA.
RP Tabor, CE (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM christopher.tabor.1@us.af.mil
NR 41
TC 3
Z9 3
U1 8
U2 10
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 2196-7350
J9 ADV MATER INTERFACES
JI Adv. Mater. Interfaces
PD MAY 6
PY 2016
VL 3
IS 9
AR 1500665
DI 10.1002/admi.201500665
PG 9
WC Chemistry, Multidisciplinary; Materials Science, Multidisciplinary
SC Chemistry; Materials Science
GA DQ0JN
UT WOS:000378885300003
ER
PT J
AU Akdim, B
Pachter, R
Mou, S
AF Akdim, Brahim
Pachter, Ruth
Mou, Shin
TI Theoretical analysis of the combined effects of sulfur vacancies and
analyte adsorption on the electronic properties of single-layer MoS2
SO NANOTECHNOLOGY
LA English
DT Article
DE single-layer defective MoS2; density functional theory; non-equilibrium
Green's function formalism; electron transport; simulated scanning
tunneling microscopy
ID TRANSITION-METAL DICHALCOGENIDES; MOLYBDENUM-DISULFIDE; 2-DIMENSIONAL
MATERIALS; OPTICAL-SPECTRA; MONOLAYER MOS2; NATURAL MOS2;
SEMICONDUCTORS; TRANSISTORS; GRAPHENE; DEFECTS
AB We report a first-principles theoretical investigation on the electronic structure and electron transport of defective single-layer (SL) MoS2, as well as of corresponding structures adsorbed with benzyl viologen (BV), which was shown to provide improved performance of a field effect transistor. O-2 adsorption was included to gain an understanding of the response upon air-exposure. Following analysis of the structure and stability of sulfur single vacancy and line defects in SL MoS2, we investigated the local transport at the adsorbed sites via a transport model that mimics a scanning tunneling spectroscopy experiment. Distinct current-voltage characteristics were indicated for adsorbed oxygen species at a sulfur vacancy. The electronic structures of defective MoS2 indicated the emergence of impurity states in the bandgap due to sulfur defects and oxygen adsorption. Electron transport calculations for the MoS2 surface with an extended defect in a device setting demonstrated that physisorption of BV enhances the output current, while facile chemisorption by O-2 upon air-exposure causes degradation of electron transport.
C1 [Akdim, Brahim; Pachter, Ruth; Mou, Shin] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Akdim, Brahim] Gen Dynam Informat Technol Inc, 500 Springfield Pike, Dayton, OH 45433 USA.
RP Akdim, B; Pachter, R (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.; Akdim, B (reprint author), Gen Dynam Informat Technol Inc, 500 Springfield Pike, Dayton, OH 45433 USA.
EM brahim.akdim.ctr@us.af.mil; ruth.pachter@us.af.mil
FU Air Force Office of Scientific Research
FX We gratefully acknowledge support by the Air Force Office of Scientific
Research and computational resources and helpful assistance provided by
the AFRL DSRC.
NR 78
TC 1
Z9 1
U1 27
U2 118
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0957-4484
EI 1361-6528
J9 NANOTECHNOLOGY
JI Nanotechnology
PD MAY 6
PY 2016
VL 27
IS 18
AR 185701
DI 10.1088/0957-4484/27/18/185701
PG 10
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Physics, Applied
SC Science & Technology - Other Topics; Materials Science; Physics
GA DH5AU
UT WOS:000372798100020
PM 26999310
ER
PT J
AU Konkova, T
Mironov, S
Korznikov, A
Korznikova, G
Myshlyaev, MM
Semiatin, SL
AF Konkova, Tatyana
Mironov, Sergey
Korznikov, Alexander
Korznikova, Galia
Myshlyaev, Mikhail M.
Semiatin, S. Lee
TI Grain growth during annealing of cryogenically-rolled Cu-30Zn brass
SO JOURNAL OF ALLOYS AND COMPOUNDS
LA English
DT Article
DE Metal and alloys; Scanning electron microscopy; Metallography;
Microstructure; Grain boundaries
ID MG-SI ALLOY; ALPHA-BRASS; MECHANICAL-PROPERTIES; PLASTIC-DEFORMATION;
MICROSTRUCTURE; COPPER; EVOLUTION; BEHAVIOR; CU; NANOSTRUCTURE
AB The grain-growth behavior of cryogenically-rolled Cu-30Zn brass during isothermal annealing at 900 degrees C was examined. The observed microstructure coarsening was interpreted in terms of normal grain growth with a grain-growth exponent of similar to 4. The relatively slow grain-growth kinetics was attributed to the formation of precipitates at the grain boundaries and the interaction of texture and grain growth. The development of a moderate-strength {110} alpha fiber texture (similar to 4 times random) as well as the presence of a limited number of twin variants within the grains suggested the occurrence of variant selection during annealing. (C) 2016 Elsevier B.V. All rights reserved.
C1 [Konkova, Tatyana; Mironov, Sergey; Korznikov, Alexander; Korznikova, Galia] Russian Acad Sci, Inst Met Superplast Problems, 39 Khalturin Str, Ufa 450001, Russia.
[Konkova, Tatyana] Univ Strathclyde, Adv Forming Res Ctr, 85 Inchinnan Dr, Inchinnan PA4 9LJ, Scotland.
[Mironov, Sergey] Tohoku Univ, Grad Sch Engn, Dept Mat Proc, 6-6-02 Aramaki Aza Aoba, Sendai, Miyagi 9808579, Japan.
[Korznikov, Alexander] Natl Res Tomsk State Univ, 36 Lenina Av, Tomsk 634050, Russia.
[Myshlyaev, Mikhail M.] Russian Acad Sci, Baikov Inst Met & Mat Sci, 49 Lenin Av, Moscow 119991, Russia.
[Myshlyaev, Mikhail M.] Russian Acad Sci, Inst Solid State Phys, 2 Acad Osypian Str, Chernogolovka 142432, Moscow Oblast, Russia.
[Semiatin, S. Lee] AFRL RXCM, Mat & Mfg Directorate, Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Mironov, S (reprint author), Tohoku Univ, Grad Sch Engn, Dept Mat Proc, 6-6-02 Aramaki Aza Aoba, Sendai, Miyagi 9808579, Japan.
EM smironov@material.tohoku.ac.jp
RI Korznikov, Alexander/F-1473-2014; SEMIATIN, SHELDON/E-7264-2017
FU Russian Fund for Fundamental Research [14-02-97004]
FX Financial support from the Russian Fund for Fundamental Research
(project No. 14-02-97004) is gratefully acknowledged. The authors are
grateful to P. Klassman for technical assistance in performing the
cryogenic-rolling experiments.
NR 32
TC 1
Z9 1
U1 5
U2 29
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0925-8388
EI 1873-4669
J9 J ALLOY COMPD
JI J. Alloy. Compd.
PD MAY 5
PY 2016
VL 666
BP 170
EP 177
DI 10.1016/j.jallcom.2016.01.097
PG 8
WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy &
Metallurgical Engineering
SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering
GA DD0AD
UT WOS:000369581800024
ER
PT J
AU Rhodes, RP
Moeller, TM
Conner, MS
AF Rhodes, R. P.
Moeller, T. M.
Conner, M. S.
TI Heat Transfer to Truncated Cylinder in Cross-flow
SO EXPERIMENTAL HEAT TRANSFER
LA English
DT Article
DE heat transfer; convection; forced convection
AB The objective of this work is to provide a correlation between the heat transfer coefficient and the Nusselt Number with the flow Reynolds number for a truncated cylindrical probe in cross-flow, a configuration that has not previously been well defined. In the experiment, thermally stabilized, dry air was discharged into the test section across a heated probe that was instrumented with thermocouples and exhausted to atmosphere. Experimental data were recorded for several run conditions. A correlation between the probe heat transfer coefficient and the Reynolds number was developed with a calculated uncertainty of 1.24%.
C1 [Rhodes, R. P.; Moeller, T. M.] Univ Tennessee, Inst Space, Dept Mech Aerosp & Biomed Engn, Tullahoma, TN 37388 USA.
[Conner, M. S.] AEDC TSTY, Arnold Engn Dev Complex, Arnold Afb, TN USA.
RP Moeller, TM (reprint author), Univ Tennessee, Inst Space, 411 BH Goethert Pkwy,Mail Stop 24, Tullahoma, TN 37388 USA.
EM tmoeller@utsi.edu
FU United States Air Force [FA9101-06-D-0001/0016]
FX This work was partially funded by United States Air Force under contract
FA9101-06-D-0001/0016.
NR 12
TC 0
Z9 0
U1 2
U2 2
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 530 WALNUT STREET, STE 850, PHILADELPHIA, PA 19106 USA
SN 0891-6152
EI 1521-0480
J9 EXP HEAT TRANSFER
JI Exp. Heat Transf.
PD MAY 3
PY 2016
VL 29
IS 3
BP 392
EP 413
DI 10.1080/08916152.2015.1012569
PG 22
WC Thermodynamics; Engineering, Mechanical
SC Thermodynamics; Engineering
GA DI8VX
UT WOS:000373781500007
ER
PT J
AU Soderlund, LL
McKenna, EA
Tastad, K
Paul, M
AF Soderlund, Laurel Lloyd
McKenna, Elizabeth A.
Tastad, Katie
Paul, Marika
TI Prevalence of permanent threshold shifts in the United States Air Force
hearing conservation program by career field, 2005-2011
SO JOURNAL OF OCCUPATIONAL AND ENVIRONMENTAL HYGIENE
LA English
DT Article
DE military; public health; hearing loss; Hearing conservation;
occupational health; noise
ID IMPAIRMENT; INDUSTRY
AB The purpose of this study was to describe changes in hearing, using the permanent threshold shift metric, among United States Air Force servicemembers, including active duty, Reserve and Air National Guard components, for demographics, job categories, and career fields. In the United States Air Force, only servicemembers who are occupationally exposed routinely to hazardous noise are monitored. Audiogram records and demographic variables were analyzed for servicemembers from 2005-2011 using data from the Department of Defense system that captures occupational hearing tests worldwide. Results suggest that occupational hearing loss was larger in males than females, in officers than enlisted populations, and in Reserve and Air National Guard than in active duty. Compared to similar civilian career fields, active duty has lower prevalence rates for occupational hearing loss overall, although Reserve and Air National Guard prevalence rates were more similar to the civilian reported rates. The proportion of personnel with permanent threshold shifts varied between 4.6-16.7% within active duty career fields, which includes 76% of the population for study timeframe. Permanent threshold shift was larger in small job categories, and in jobs that are not considered exposed to hazardous noise routinely which is comparative with results from civilian data analysis of occupational hearing loss. Further investigation into testing practices for Air Force specific groups, use of the system for nonoccupational hearing testing, and challenges to follow-up compliance is warranted. Increased surveillance procedures for occupational hearing loss are needed to address concerns on the prevalence of servicemember hearing loss, the role of recreational and lifestyle factors to contribute the high reported hearing loss prevalence of veterans compared to nonveterans.
C1 [Soderlund, Laurel Lloyd] Henry M Jackson Fdn Adv Mil Med, Dayton, OH USA.
[McKenna, Elizabeth A.; Tastad, Katie] US Air Force, Sch Aerosp Med, Epidemiol Consult Serv, Dayton, OH USA.
[Paul, Marika] Ohio State Univ, Coll Publ Hlth, Columbus, OH 43210 USA.
RP McKenna, EA (reprint author), US Air Force, Sch Aerosp Med, Epidemiol Consult Serv, Wright Patterson AFB, OH 45433 USA.
EM elizabeth_anne.mckenna@us.af.mil
NR 19
TC 0
Z9 0
U1 3
U2 4
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 530 WALNUT STREET, STE 850, PHILADELPHIA, PA 19106 USA
SN 1545-9624
EI 1545-9632
J9 J OCCUP ENVIRON HYG
JI J. Occup. Environ. Hyg.
PD MAY 3
PY 2016
VL 13
IS 5
BP 383
EP 392
DI 10.1080/15459624.2015.1123814
PG 10
WC Environmental Sciences; Public, Environmental & Occupational Health
SC Environmental Sciences & Ecology; Public, Environmental & Occupational
Health
GA DH1BT
UT WOS:000372520100003
ER
PT J
AU Zhou, ZY
Grocke, G
Yanguas-Gil, A
Wang, XJ
Gao, Y
Sun, NX
Howe, B
Chen, X
AF Zhou, Ziyao
Grocke, Garrett
Yanguas-Gil, Angel
Wang, Xinjun
Gao, Yuan
Sun, Nianxiang
Howe, Brandon
Chen, Xing
TI CoFe2/Al2O3/PMNPT multiferroic heterostructures by atomic layer
deposition
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID FILMS; NANOPARTICLES; NANOWIRES; METALS
AB Multiferroic materials and applications allow electric bias control of magnetism or magnetic bias control of polarization, enabling fast, compact, energy-efficient devices in RF/microwave communication systems such as filters, shifters, and antennas; electronics devices such as inductors and capacitors; and other magnetic material related applications including sensors and memories. In this manuscript, we utilize atomic layer deposition technology to grow magnetic CoFe metallic thin films onto PMNPT, with a similar to 110 Oe electric field induced ferromagnetic resonance field shift in the CoFe/Al2O3/PMNPT multiferroic heterostructure. Our work demonstrates an atomic layer deposition fabricated multiferroic heterostructure with significant tunability and shows that the unique thin film growth mechanism will benefit integrated multiferroic application in near future. Published by AIP Publishing.
C1 [Zhou, Ziyao; Grocke, Garrett; Yanguas-Gil, Angel; Chen, Xing] Argonne Natl Lab, Div Energy Syst, Lemont, IL 60517 USA.
[Wang, Xinjun; Gao, Yuan; Sun, Nianxiang] Northeastern Univ, Elect & Comp Engn, Boston, MA 02115 USA.
[Howe, Brandon] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Chen, X (reprint author), Argonne Natl Lab, Div Energy Syst, Lemont, IL 60517 USA.
EM xchen@anl.gov
RI Sun, Nian Xiang/F-9590-2010; Gao, Yuan/E-4277-2016;
OI Sun, Nian Xiang/0000-0002-3120-0094; Gao, Yuan/0000-0002-2444-1180;
Chen, Xing/0000-0002-8076-657X
FU U.S. Department of Energy, Office of Science, Office of Basic Energy
Sciences; [DE-AC02-06CH11357]
FX The submitted manuscript has been created by UChicago Argonne, LLC,
Operator of Argonne National Laboratory ("Argonne"). Argonne, a U.S.
Department of Energy Office of Science laboratory, is operated under
Contract No. DE-AC02-06CH11357. Use of the TEM at the Center for
Nanoscale Materials at Argonne National Laboratory was supported by the
U.S. Department of Energy, Office of Science, Office of Basic Energy
Sciences, under the same contract. The U.S. Government retains for
itself, and others acting on its behalf, a paid-up nonexclusive,
irrevocable worldwide license in said article to reproduce, prepare
derivative works, distribute copies to the public, and perform publicly
and display publicly, by or on behalf of the government. The funding
source for the work reported here did not have a role in study design,
data collection, analysis, data interpretation, writing, or in the
decision to publish.
NR 27
TC 1
Z9 1
U1 20
U2 31
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD MAY 2
PY 2016
VL 108
IS 18
AR 182907
DI 10.1063/1.4948977
PG 4
WC Physics, Applied
SC Physics
GA DN4GY
UT WOS:000377023300032
ER
PT J
AU Soref, R
Hendrickson, JR
Sweet, J
AF Soref, Richard
Hendrickson, Joshua R.
Sweet, Julian
TI Simulation of germanium nanobeam electro-optical 2 x 2 switches and 1 x
1 modulators for the 2 to 5 mu m infrared region
SO OPTICS EXPRESS
LA English
DT Article
ID ALL-OPTICAL MODULATION; WAVE-GUIDES; SILICON CHIP; ENERGY;
MICROCAVITIES; CONSUMPTION; LIFETIME; CAVITIES; COMPACT; DESIGN
AB This paper proposes and analyzes resonant Si-based electro-optical modulators and switches that use Ge-on-Si3N4 nanobeams (NBs) operating at 2 to 5 mu m wavelengths. The wavelength of operation can be extended to 15 mu m by mounting the Ge channel waveguides on a bulk Si chip. Electrons and holes are injected into the intrinsic Ge NB cavity center via thin P-and N-doped Ge wings on the NB (a lateral PIN diode at similar to 0.5 V forward bias). Simulations of the carrier-induced resonance-wavelength shift-and-damping in a 1 x 1 modulator show 6 dB of extinction at similar to 60 fJ/bit over the mid infrared. The NB's active length is.-scale. The cavity uses tapered-diameter air holes. Intensity modulation at similar to 1 Gb/s appears feasible. High-performance 2 x 2 switching is predicted by embedding one NB in each arm of a Mach-Zehnder device. The resonance of each identical NB is shifted by the same.. via carrier injection. Calculations show very low insertion loss and crosstalk in both the cross and bar states; however, the cross-to-bar energy, around 8 pJ/bit, is much higher than that in the 2 x 2 version that employs PN-junction carrier depletion. (C) 2016 Optical Society of America
C1 [Soref, Richard] Univ Massachusetts, Dept Engn, Boston, MA 02125 USA.
[Hendrickson, Joshua R.; Sweet, Julian] Air Force Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
[Sweet, Julian] Wyle Labs, Beavercreek, OH 45431 USA.
RP Soref, R (reprint author), Univ Massachusetts, Dept Engn, Boston, MA 02125 USA.
EM soref@rcn.com
FU Air Force Office of Scientific Research [15RYCOR159]; AFOSR
[FA9550-14-1-0196]; UK EPSRC Project Migration
FX JH acknowledges support from the Air Force Office of Scientific Research
(Program Manager Dr. Gernot Pomrenke) under contract number 15RYCOR159.
RS appreciates sponsorship by the AFOSR on grant FA9550-14-1-0196 and by
the UK EPSRC Project Migration.
NR 46
TC 1
Z9 1
U1 3
U2 6
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1094-4087
J9 OPT EXPRESS
JI Opt. Express
PD MAY 2
PY 2016
VL 24
IS 9
BP 9369
EP 9382
DI 10.1364/OE.24.009369
PG 14
WC Optics
SC Optics
GA DK9OE
UT WOS:000375259600025
PM 27137553
ER
PT J
AU Halls, BR
Thul, DJ
Michaelis, D
Roy, S
Meyer, TR
Gord, JR
AF Halls, Benjamin R.
Thul, Daniel J.
Michaelis, Dirk
Roy, Sukesh
Meyer, Terrence R.
Gord, James R.
TI Single-shot, volumetrically illuminated, three-dimensional, tomographic
laser-induced-fluorescence imaging in a gaseous free jet
SO OPTICS EXPRESS
LA English
DT Article
ID TURBULENT JETS; GAS CONCENTRATION; FLAME; FLOWS; FIELD; RECONSTRUCTION;
DISTRIBUTIONS; TEMPERATURE; DIAGNOSTICS; NUMBER
AB Single-shot, tomographic imaging of the three-dimensional concentration field is demonstrated in a turbulent gaseous free jet in co-flow using volumetrically illuminated laser-induced fluorescence. The fourth-harmonic output of an Nd:YAG laser at 266 nm is formed into a collimated 15 x 20 mm(2) beam to excite the ground singlet state of acetone seeded into the central jet. Subsequent fluorescence is collected along eight lines of sight for tomographic reconstruction using a combination of stereoscopes optically coupled to four two-stage intensified CMOS cameras. The performance of the imaging system is evaluated and shown to be sufficient for recording instantaneous three-dimensional features with high signal-to-noise (130: 1) and nominal spatial resolution of 0.6-1.5 mm at x/D = 7-15.5. (C) 2016 Optical Society of America
C1 [Halls, Benjamin R.; Gord, James R.] US Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
[Thul, Daniel J.; Roy, Sukesh] Spectral Energies LLC, Dayton, OH 45431 USA.
[Michaelis, Dirk] LaVis GmbH, Anna Vandenhoeck Ring 19, D-37081 Gottingen, Germany.
[Meyer, Terrence R.] Purdue Univ, Sch Mech Engn, W Lafayette, IN 47907 USA.
RP Gord, JR (reprint author), US Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.; Meyer, TR (reprint author), Purdue Univ, Sch Mech Engn, W Lafayette, IN 47907 USA.
EM trmeyer@purdue.edu; james.gord@us.af.mil
FU National Research Council at the Air Force Research Laboratory,
Aerospace Systems Directorate, Wright-Patterson AFB; Air Force Research
Laboratory [FA8650-15-D-2518]; Air Force Office of Scientific Research;
National Science Foundation [CTS-1403969]
FX Benjamin Halls is funded under a National Research Council Post-doctoral
Research Associateship award at the Air Force Research Laboratory,
Aerospace Systems Directorate, Wright-Patterson AFB. This work was
funded in part by the Air Force Research Laboratory under Contract No.
FA8650-15-D-2518, the Air Force Office of Scientific Research, and the
National Science Foundation under Contract No. CTS-1403969. This
manuscript has been cleared for public release by the Air Force Research
Laboratory (No. 88ABW-2015-4918).
NR 31
TC 4
Z9 4
U1 5
U2 9
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1094-4087
J9 OPT EXPRESS
JI Opt. Express
PD MAY 2
PY 2016
VL 24
IS 9
BP 10040
EP 10049
DI 10.1364/OE.24.010040
PG 10
WC Optics
SC Optics
GA DK9OE
UT WOS:000375259600086
PM 27137614
ER
PT J
AU Shumway, JD
Anderson, DN
Bishop, B
AF Shumway, Joshua D.
Anderson, Danielle N.
Bishop, Brett
TI Effectiveness of an Injury Prevention Warm-up for Unit Physical
Training: A Case Series of Two Flying Squadrons
SO MILITARY MEDICINE
LA English
DT Article; Proceedings Paper
CT Military Health System Research Symposium
CY AUG 17-21, 2014
CL Fort Lauderdale, FL
ID FUNCTIONAL MOVEMENT; BALANCE; RECOMMENDATIONS; MILITARY
AB Injury prevention has been assessed and studied in professional and collegiate athletic populations, but application to the military setting has been limited. The purpose of this study was to assess the effectiveness of an injury prevention warm-up in two flying squadrons. At the commanders' request, two Air Force flying squadrons (276 individuals) were provided an injury prevention warm-up of evidence-based exercises, which focused on functional range of motion and dynamic core stability. The routine was performed before unit physical training twice a week. The number of injuries did not significantly decrease after the injury prevention warm-up compared to 12 months before the intervention. However, the amount of time a subject was "grounded," duty not involving flying, because of a musculoskeletal injury decreased significantly from 146 days per month to 73 days per month (p = 0.02). A quick, generic warm-up of evidence-based exercises may decrease the number of limited duty days in a flying population.
C1 [Shumway, Joshua D.; Anderson, Danielle N.; Bishop, Brett] David Grant USAF Med Ctr, 101 Bodin Circle, Travis AFB, CA 94534 USA.
RP Shumway, JD (reprint author), David Grant USAF Med Ctr, 101 Bodin Circle, Travis AFB, CA 94534 USA.
NR 18
TC 0
Z9 0
U1 2
U2 2
PU ASSOC MILITARY SURG US
PI BETHESDA
PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 USA
SN 0026-4075
EI 1930-613X
J9 MIL MED
JI Milit. Med.
PD MAY
PY 2016
VL 181
IS 5
SU S
BP 95
EP 103
DI 10.7205/MILMED-D-15-00190
PG 9
WC Medicine, General & Internal
SC General & Internal Medicine
GA DW5LJ
UT WOS:000383686400015
PM 27168558
ER
PT J
AU Blakeman, TC
Rodriquez, D
Britton, TJ
Johannigman, JA
Petro, MC
Branson, RD
AF Blakeman, Thomas C.
Rodriquez, Dario, Jr.
Britton, Tyler J.
Johannigman, Jay A.
Petro, Michael C.
Branson, Richard D.
TI Performance of Portable Ventilators Following Storage at Temperature
Extremes
SO MILITARY MEDICINE
LA English
DT Article; Proceedings Paper
CT Military Health System Research Symposium
CY AUG 17-21, 2014
CL Fort Lauderdale, FL
ID EMERGENCY VENTILATORS; SENSITIVITY; ENVIRONMENT
AB In the current theater of operation, medical devices are often shipped and stored at ambient conditions. The effect of storage at hot and cold temperature extremes on ventilator performance is unknown. We evaluated three portable ventilators currently in use or being evaluated for use by the Department of Defense (731, Impact Instrumentation; T1, Hamilton Medical; and Revel, CareFusion) at temperature extremes in a laboratory setting. The ventilators were stored at temperatures of 60 degrees C and -35 degrees C for 24 hours and were allowed to acclimate to room temperature for 30 minutes before evaluation. The T1 required an extra 15 to 30 minutes of acclimation to room temperature before the ventilator would deliver breaths. All delivered tidal volumes at room temperature and after storage at temperature extremes were less than the +/- 10% American Society for Testing and Materials standard with the Revel. Delivered tidal volumes at the pediatric settings were less than the +/- 10% threshold after storage at both temperatures and at room temperature with the 731. Storage at extreme temperature affected the performance of the portable ventilators tested. This study showed that portable ventilators may need an hour or more of acclimation time at room temperature after storage at temperature extremes to operate as intended.
C1 [Blakeman, Thomas C.; Johannigman, Jay A.; Branson, Richard D.] Univ Cincinnati, Coll Med, Dept Surg, Div Trauma Crit Care, 231 Albert Sabin Way, Cincinnati, OH 45267 USA.
[Rodriquez, Dario, Jr.; Britton, Tyler J.; Petro, Michael C.] Univ Cincinnati, Med Ctr, US Air Force, Cincinnati Ctr Sustainment Trauma & Readiness Ski, 234 Goodman St, Cincinnati, OH 45219 USA.
RP Blakeman, TC (reprint author), Univ Cincinnati, Coll Med, Dept Surg, Div Trauma Crit Care, 231 Albert Sabin Way, Cincinnati, OH 45267 USA.
NR 9
TC 0
Z9 0
U1 0
U2 0
PU ASSOC MILITARY SURG US
PI BETHESDA
PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 USA
SN 0026-4075
EI 1930-613X
J9 MIL MED
JI Milit. Med.
PD MAY
PY 2016
VL 181
IS 5
SU S
BP 156
EP 159
DI 10.7205/MILMED-D-15-00135
PG 4
WC Medicine, General & Internal
SC General & Internal Medicine
GA DW5LJ
UT WOS:000383686400024
PM 27168567
ER
PT J
AU Blakeman, TC
Rodriquez, D
Britton, TJ
Johannigman, JA
Petro, MC
Branson, RD
AF Blakeman, Thomas C.
Rodriquez, Dario, Jr.
Britton, Tyler J.
Johannigman, Jay A.
Petro, Michael C.
Branson, Richard D.
TI Evaluation of Oxygen Concentrators and Chemical Oxygen Generators at
Altitude and Temperature Extremes
SO MILITARY MEDICINE
LA English
DT Article; Proceedings Paper
CT Military Health System Research Symposium
CY AUG 17-21, 2014
CL Fort Lauderdale, FL
ID WALK TEST; DELIVERY; ENVIRONMENT; THERAPY; DEVICE
AB Oxygen cylinders are heavy and present a number of hazards, and liquid oxygen is too heavy and cumbersome to be used in far forward environments. Portable oxygen concentrators (POCs) and chemical oxygen generators (COGs) have been proposed as a solution. We evaluated 3 commercially available POCs and 3 COGs in a laboratory setting. Altitude testing was done at sea level and 8,000, 16,000, and 22,000 ft. Temperature extreme testing was performed after storing devices at 60 degrees C and -35 degrees C for 24 hours. Mean FIO2 decreased after storage at -35 degrees C with Eclipse and iGo POCs and also at the higher volumes after storage at 60 degrees C with the Eclipse. The iGo ceased to operate at 16,000 ft, but the Eclipse and Saros were unaffected by altitude. Oxygen flow, duration of operation, and total oxygen volume varied between COGs and within the same device type. Output decreased after storage at -35 degrees C, but increased at each altitude as compared to sea level. This study showed significant differences in the performance of POCs and COGs after storage at temperature extremes and with the COGs at altitude. Clinicians must understand the performance characteristics of devices in all potential environments.
C1 [Blakeman, Thomas C.; Johannigman, Jay A.; Branson, Richard D.] Univ Cincinnati, Coll Med, Dept Surg, Div Trauma & Crit Care, 231 Albert Sabin Way, Cincinnati, OH 45267 USA.
[Rodriquez, Dario, Jr.; Britton, Tyler J.; Petro, Michael C.] Univ Cincinnati, Med Ctr, US Air Force, Cincinnati C STARS, 234 Goodman St, Cincinnati, OH 45219 USA.
RP Blakeman, TC (reprint author), Univ Cincinnati, Coll Med, Dept Surg, Div Trauma & Crit Care, 231 Albert Sabin Way, Cincinnati, OH 45267 USA.
NR 14
TC 0
Z9 0
U1 0
U2 0
PU ASSOC MILITARY SURG US
PI BETHESDA
PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 USA
SN 0026-4075
EI 1930-613X
J9 MIL MED
JI Milit. Med.
PD MAY
PY 2016
VL 181
IS 5
SU S
BP 160
EP 168
DI 10.7205/MILMED-D-15-00130
PG 9
WC Medicine, General & Internal
SC General & Internal Medicine
GA DW5LJ
UT WOS:000383686400025
PM 27168568
ER
PT J
AU Burke, WJ
Pfaff, RF
Martinis, CR
Gentile, LC
AF Burke, W. J.
Pfaff, R. F.
Martinis, C. R.
Gentile, L. C.
TI C/NOFS remote sensing of ionospheric reflectance
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
DE Alfvenic reflection coefficients; incident; reflected Poynting flux;
MSTID electrodynamics
ID NIGHTTIME MIDLATITUDE IONOSPHERE; ELECTRIC-FIELDS; ALFVEN WAVES;
F-LAYER; ARECIBO; DISTURBANCES; CONDUCTANCES; INSTABILITY; CURRENTS;
IMAGES
AB Alfven waves play critical roles in the electrodynamic coupling of plasmas at magnetically conjugate regions in near-Earth space. Associated electric (E*) and magnetic (B*) field perturbations sampled by sensors on satellites in low-Earth orbits are generally superpositions of incident and reflected waves. However, lack of knowledge about ionospheric reflection coefficients () hinders understanding of generator outputs and load absorption of Alfven wave energies. Here we demonstrate a new method for estimating using satellite measurements of ambient E* and B* then apply it to a case in which the Communication/Navigation Outage Forecasting System (C/NOFS) satellite flew conjugate to the field of view of a 630.0nm all-sky imager at El Leoncito, Argentina, while medium-scale traveling ionosphere disturbances were detected in its field of view. In regions of relatively large amplitudes of E* and B*, calculated values ranged between 0.67 and 0.88. This implies that due to impedance mismatches, the generator ionosphere puts out significantly more electromagnetic energy than the load can absorb. Our analysis also uncovered caveats concerning the method's range of applicability in regions of low E* and B*. The method can be validated in future satellite-based auroral studies where energetic particle precipitation fluxes can be used to make independent estimates of .
C1 [Burke, W. J.] Boston Coll, Inst Sci Res, Chestnut Hill, MA 02167 USA.
[Pfaff, R. F.] NASA, Goddard Space Flight Ctr, Greenbelt, MD USA.
[Martinis, C. R.] Boston Univ, Ctr Space Phys, Boston, MA 02215 USA.
[Gentile, L. C.] Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM USA.
RP Burke, WJ (reprint author), Boston Coll, Inst Sci Res, Chestnut Hill, MA 02167 USA.
FU Air Force Office of Scientific Research [FA9550-14-1-0222]; Boston
College [FA9453-12-C-0205, FA8712-10-C-0001]; NSF Aeronomy grant
[1123222]; Air Force Office of Scientific Research
FX This work was supported in part by grant FA9550-14-1-0222 from the Air
Force Office of Scientific Research. The authors wish to acknowledge the
expert analysis and processing of the VEFI DC electric field and
magnetic field data used in this study by Henry Freudenreich and Carmen
Liebrecht at the NASA/Goddard Space Flight Center. VEFI data from the
first 3 years of the C/NOFS mission are available on the CDA website
with plans to make later VEFI data available. Observations from the
Boston University all-sky imagers are available at
http://sirius.bu.edu/. W.J.B. received support under contracts
FA9453-12-C-0205 and FA8712-10-C-0001 with Boston College. C.R.M.
acknowledges the support of NSF Aeronomy grant 1123222 and Air Force
Office of Scientific Research grant for DURIP instrumentation.
NR 39
TC 1
Z9 1
U1 1
U2 2
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9380
EI 2169-9402
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD MAY
PY 2016
VL 121
IS 5
BP 4924
EP 4932
DI 10.1002/2016JA022345
PG 9
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA DR6QD
UT WOS:000380025500074
ER
PT J
AU Stewart, EC
Patil, MJ
Canfield, RA
Snyder, RD
AF Stewart, Eric C.
Patil, Mayuresh J.
Canfield, Robert A.
Snyder, Richard D.
TI Aeroelastic Shape Optimization of a Flapping Wing
SO JOURNAL OF AIRCRAFT
LA English
DT Article; Proceedings Paper
CT 10th AIAA Multidisciplinary Design Optimization Conference
CY JAN 13-17, 2014
CL National Harbor, MD
SP AIAA
ID DESIGN; INSECT; FLIGHT; FLEXIBILITY; KINEMATICS
AB This paper presents the theory and results for the shape and structural optimization of a platelike flapping wing. The aeroelastic system is analyzed by coupling an unsteady vortex lattice aerodynamics model with a plate finite element model. The assumptions in the aerodynamic model allow the system of equations to be calculated with the inversion of a single matrix, greatly reducing the computational cost. The design variables are the shape parameters from the modified Zimmerman method and the polynomial coefficients that describe the wing thickness. The wing shape and structure are optimized using two multiobjective optimization formulations. The first optimization minimizes the input power while maximizing the cycle-averaged thrust. The input power is the secondary objective function and is treated as a nonlinear constraint, whereas the cycle-averaged thrust is the primary objective function. A second multiobjective formulation that treats wing mass as the secondary objective function is also performed. The power-thrust-optimal wing designs minimize the contribution of the wing deformation to the input power over the flapping cycle. The mass-optimal shapes maximize the wingspan and tailor the wing thickness such that the wing deformation adds to the thrust. It is shown that, although thrust benefits from added wing deformation, it also adds to the power required to flap the wing.
C1 [Stewart, Eric C.] Virginia Polytech Inst & State Univ, Blacksburg, VA 24060 USA.
[Patil, Mayuresh J.; Canfield, Robert A.] Virginia Polytech Inst & State Univ, Dept Aerosp & Ocean Engn, Blacksburg, VA 24060 USA.
[Snyder, Richard D.] US Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Stewart, Eric C.] NASA, AST Struct Dynam, Washington, DC 20546 USA.
RP Stewart, EC (reprint author), Virginia Polytech Inst & State Univ, Blacksburg, VA 24060 USA.; Stewart, EC (reprint author), NASA, AST Struct Dynam, Washington, DC 20546 USA.
EM ecstew@vt.edu; mpatil@vt.edu; bob.canfield@vt.edu;
richard.snyder@wpafb.af.mil
RI Patil, Mayuresh/E-4644-2013
OI Patil, Mayuresh/0000-0001-9601-2249
NR 47
TC 0
Z9 0
U1 5
U2 5
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0021-8669
EI 1533-3868
J9 J AIRCRAFT
JI J. Aircr.
PD MAY-JUN
PY 2016
VL 53
IS 3
BP 636
EP 650
DI 10.2514/1.C033278
PG 15
WC Engineering, Aerospace
SC Engineering
GA DP3SN
UT WOS:000378415500003
ER
PT J
AU Padmanabhan, MA
Dowell, EH
Thomas, JP
Pasiliao, CL
AF Padmanabhan, Madhusudan A.
Dowell, Earl H.
Thomas, Jeffrey P.
Pasiliao, Crystal L.
TI Store-Induced Limit-Cycle Oscillations Due to Nonlinear Wing-Store
Attachment
SO JOURNAL OF AIRCRAFT
LA English
DT Article; Proceedings Paper
CT 56th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials
Conference / 33rd Wind Energy Symposium
CY JAN 05-09, 2015
CL Kissimmee, FL
SP AIAA, ASCE, AHS, ASC
ID CONTROL SURFACE; FIGHTER; BEHAVIOR; FREEPLAY; FLUTTER; AIRFOIL
AB Several high-performance fighter aircraft exhibit store-induced limit-cycle oscillations, leading to pilot discomfort, potential structural fatigue, and flight envelope restrictions. The roles of various aerodynamic and structural factors causing the limit-cycle oscillation are not sufficiently understood, and their numerical exploration via time marching is computationally expensive. In this paper, the effects of nonlinear stiffness and damping in the wing-store attachments of the F-16 aircraft are examined, in the presence of steady flow aerodynamic nonlinearity, using the computationally efficient harmonic balance method. Structural mechanisms including cubic restoring force of both softening and hardening types, freeplay, and Coulomb friction are systematically evaluated, and the most likely among these are identified by comparing the computed limit-cycle oscillation results to flight data. An extension of the harmonic balance method to handle nonlinear unsteady aerodynamics along with structural nonlinearity is also proposed to enable rapid and accurate limit-cycle oscillation assessment of candidate store configurations.
C1 [Padmanabhan, Madhusudan A.; Dowell, Earl H.; Thomas, Jeffrey P.] Duke Univ, Dept Mech Engn & Mat Sci, Durham, NC 27708 USA.
[Pasiliao, Crystal L.] US Air Force Res Lab, Munit Directorate, Aerodynam Sci Branch, 101 West Eglin Blvd,Suite 330, Eglin AFB, FL 32542 USA.
RP Padmanabhan, MA (reprint author), Duke Univ, Dept Mech Engn & Mat Sci, Durham, NC 27708 USA.
NR 26
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U1 2
U2 2
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0021-8669
EI 1533-3868
J9 J AIRCRAFT
JI J. Aircr.
PD MAY-JUN
PY 2016
VL 53
IS 3
BP 778
EP 789
DI 10.2514/1.C033577
PG 12
WC Engineering, Aerospace
SC Engineering
GA DP3SN
UT WOS:000378415500015
ER
PT J
AU Merrick, JD
Reeder, MF
AF Merrick, Justin D.
Reeder, Mark F.
TI Sphere Release from a Rectangular Cavity at Mach 2.22 Freestream
Conditions
SO JOURNAL OF AIRCRAFT
LA English
DT Article; Proceedings Paper
CT 33rd AIAA Applied Aerodynamics Conference
CY JUN 22-26, 2015
CL Dallas, TX
SP AIAA
ID FLOW
AB Experimental and computational methods were used to investigate the characteristics of a scaled, generically shaped weapons internal carriage and separation bay with a length-to-depth ratio of 4.5 at multiple Mach numbers and stagnation pressures. Three new nozzles were designed, manufactured, and characterized for the U.S. Air Force Institute of Technology small supersonic tunnel, yielding freestream Mach numbers of 1.43, 1.84, and 2.22. In addition, a control valve was reconfigured to achieve stagnation pressures as low as 1.0 psia, allowing more realistic scaling. These nozzles were used in conjunction with piezoresistive pressure transducers and high-speed schlieren photography to capture the time history of the pressure and the acoustic spectra of the cavity. The nominal Mach 2.3 nozzle was used in free-drop testing of a 1: 20 scaled sphere and compared with computational simulations. The computational solution was obtained using the OVERFLOW solver with incorporated six-degree-of-freedom motion and the delayed detached-eddy simulation/shear stress transport hybrid turbulence model. Analysis of the schlieren video generated by the experimental tests allowed direct comparison of computational and experimental trajectories. Measured trajectories compared closely to computational trajectories, especially for the lowest stagnation pressure settings, where heavy Mach scaling yielded operationally relevant conditions, despite the small scale of the tests.
C1 [Merrick, Justin D.] US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
[Reeder, Mark F.] US Air Force, Inst Technol, Dept Aeronaut & Astronaut, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
RP Merrick, JD (reprint author), US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
NR 9
TC 0
Z9 0
U1 3
U2 3
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0021-8669
EI 1533-3868
J9 J AIRCRAFT
JI J. Aircr.
PD MAY-JUN
PY 2016
VL 53
IS 3
BP 822
EP 829
DI 10.2514/1.C033636
PG 8
WC Engineering, Aerospace
SC Engineering
GA DP3SN
UT WOS:000378415500019
ER
PT J
AU Singh, KV
Brown, RN
Kolonay, R
AF Singh, Kumar V.
Brown, Richard N.
Kolonay, Raymond
TI Receptance-Based Active Aeroelastic Control with Embedded Control
Surfaces Having Actuator Dynamics
SO JOURNAL OF AIRCRAFT
LA English
DT Article; Proceedings Paper
CT 56th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and
Materials Conference / 33rd Wind Energy Symposium
CY JAN 05-09, 2015
CL Kissimmee, FL
SP AIAA, ASCE, AHS, ASC, ASME
ID VIBRATION CONTROL; LEADING-EDGE; SUPPRESSION; PROGRAM; DESIGN; SYSTEM;
MODEL
AB To implement active aeroelastic control, control surfaces on a given wing configuration are moved using actuators having their own dynamic characteristics. The inclusion of actuator dynamics leads to the coupling of aeroelastic and actuator modes, and may result in instability in the closed-loop coupled aeroservoelastic system. During the design phase, various types of actuators may be considered, and hence, the stability and performance of the coupled system needs to be evaluated. In this research, a simultaneous control for aeroelastic and actuator poles is developed, which allows for the desired pole placement in a coupled aeroservoelastic system. This enables flutter boundary extension and suppression of flutter instabilities. The design of the controller is based on the method of receptances and requires the transfer functions associated with the aeroelastic structure and the actuators. This approach also allows the partial control of some selected aeroelastic modes without influencing the actuator modes, which ensures the stability of a coupled aeroservoelastic system irrespective of the selected actuator model. Different wing models having multiple control surfaces have been considered in the simulation. By using the associated numerical receptances, several examples have also been presented to demonstrate the solution strategy and performance of the controller.
C1 [Singh, Kumar V.; Brown, Richard N.] Miami Univ, Oxford, OH 45056 USA.
[Kolonay, Raymond] US Air Force Res Lab, Multidisciplinary Sci & Technol Ctr, Wright Patterson AFB, OH 45433 USA.
RP Singh, KV (reprint author), Miami Univ, Oxford, OH 45056 USA.
RI Singh, Kumar/D-5183-2015
OI Singh, Kumar/0000-0002-9868-5583
NR 49
TC 0
Z9 0
U1 4
U2 6
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0021-8669
EI 1533-3868
J9 J AIRCRAFT
JI J. Aircr.
PD MAY-JUN
PY 2016
VL 53
IS 3
BP 830
EP 845
DI 10.2514/1.C033658
PG 16
WC Engineering, Aerospace
SC Engineering
GA DP3SN
UT WOS:000378415500020
ER
PT J
AU Tauer, TM
Kunz, DL
Lindsley, NJ
AF Tauer, Thomas M.
Kunz, Donald L.
Lindsley, Ned J.
TI Visualization of Nonlinear Aerodynamic Phenomena During F-16 Limit-Cycle
Oscillations
SO JOURNAL OF AIRCRAFT
LA English
DT Article
ID FIGHTER
C1 [Tauer, Thomas M.] US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
[Kunz, Donald L.] US Air Force, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
[Lindsley, Ned J.] US Air Force, Inst Technol, AFRL RQVC, Wright Patterson AFB, OH 45433 USA.
RP Tauer, TM (reprint author), US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
FU ZONA
FX The authors wish to acknowledge the contributions of the U.S. Air Force
SEEK Eagle Office (AFSEO), the U.S. Air Force Test Pilot School (TPS),
and ZONA Technology, Inc. AFSEO designed and built the reconfigurable
AIM-9 missiles and provided the F-16 finite-element model. The flight
tests were performed at TPS, with the support of their able staff. ZONA
provided and supported the High Definition Geometry aerodynamic model,
which was developed for the U.S. Air Force. The views expressed in this
document are those of the authors and do not reflect the official policy
or position of the United States Air Force, Department of Defense, or
the United States Government.
NR 25
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Z9 0
U1 0
U2 0
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0021-8669
EI 1533-3868
J9 J AIRCRAFT
JI J. Aircr.
PD MAY-JUN
PY 2016
VL 53
IS 3
BP 865
EP +
DI 10.2514/1.C033534
PG 6
WC Engineering, Aerospace
SC Engineering
GA DP3SN
UT WOS:000378415500024
ER
PT J
AU Figueroa, RA
Cortes, PF
Accatino, L
Sorensen, R
AF Figueroa, Rodrigo A.
Cortes, Paula F.
Accatino, Luigi
Sorensen, Richard
TI Management of psychological trauma in primary care
SO REVISTA MEDICA DE CHILE
LA English
DT Article
DE Practice Guidelines as Topic; Primary Health Care; Psychological trauma;
Stress Disorders; Post-Traumatic; Trauma and Stressor Related Disorders
ID POSTTRAUMATIC-STRESS-DISORDER; MENTAL-HEALTH; RISK-FACTORS; FEBRUARY 27;
METAANALYSIS; EPIDEMIOLOGY; COMORBIDITY; EVENTS; ADULTS; BENZODIAZEPINES
AB Exposure to traumatic events is frequent in the general population and psychiatric sequelae such as post-traumatic stress disorders are common. The symptoms of psychiatric sequelae after trauma are vague, with multiple psychological and physical symptoms, which can confuse the health care professional. This paper seeks to facilitate the work in primary care, providing practical information about the diagnosis, initial management and referral of patients who have suffered traumatic experiences. Some early interventions and treatments are suggested.
C1 [Figueroa, Rodrigo A.; Accatino, Luigi] Pontificia Univ Catolica Chile, Escuela Med, Dept Psiquiatria, Valparaiso, Chile.
[Figueroa, Rodrigo A.; Cortes, Paula F.] CIGIDEN, Santiago, Chile.
[Sorensen, Richard] US Air Force, New York, NY USA.
RP Figueroa, RA (reprint author), Red Salud UC Christus, Ctr Med San Joaquin, Ctr Salud Mental, Av Vicuna Mackenna 4686, Santiago, Chile.
EM rfiguerc@uc.cl
NR 65
TC 0
Z9 0
U1 2
U2 2
PU SOC MEDICA SANTIAGO
PI SANTIAGO 9
PA BERNARDA MORIN 488 PROVIDENCIA, CASILLA 168 CORREO 55, SANTIAGO 9,
00000, CHILE
SN 0034-9887
EI 0717-6163
J9 REV MED CHILE
JI Rev. Medica Chile
PD MAY
PY 2016
VL 144
IS 5
BP 643
EP 655
PG 13
WC Medicine, General & Internal
SC General & Internal Medicine
GA DP2UI
UT WOS:000378348200013
PM 27552016
ER
PT J
AU Shen, Y
Leontsev, S
Sheets, AO
Horwath, JC
Turgut, Z
AF Shen, Y.
Leontsev, S.
Sheets, A. O.
Horwath, J. C.
Turgut, Z.
TI Effect of flake thickness on coercivity of nanocrystalline SmCo5 bulk
prepared from anisotropic nanoflake powder
SO AIP ADVANCES
LA English
DT Article; Proceedings Paper
CT 13th Joint Magnetism and Magnetic Materials (MMM)/Intermag Conference
CY JAN 11-15, 2016
CL San Diego, CA
SP Amer Inst Phys, IEEE Magnet soc
ID MAGNETS
AB In this study, nanocrystalline SmCo5 bulk magnets were prepared by hot-pressing of nanoflake powders fabricated via surfactant-assisted high energy ball milling. Effect of the flake thickness on magnetic coercivity of the SmCo5 bulk was investigated. Anisotropic SmCo5 nanoflakes with thickness between 100 and 1000 nm were prepared by varying the milling parameter of ball-to-powder weight ratio. XRD analysis revealed that as-milled flake powders possessed nanocrystalline grains with no observable oxide peaks. The coercivity of the flake powders varied between 19.9 and 21.3 kOe for 1000 nm to 100 nm thick flakes, which indicated that the flake thickness in this range had no obvious effect on the coercivity of the powders. However, the coercivity of the bulks showed a strong dependence on the flake thickness. The bulk coercivity value of 10.97 kOe corresponding to the flake thickness of 100 nm, was 80% higher compared to the bulk prepared with the flakes of 1000 nm. XRD results on compacted samples did not show any grain growth, however, Sm2O3 and free Co were detected in SmCo5 bulks and their content increased with reduced flake thickness. Interestingly enough the bulk coercivity was not deteriorated with the presence of Sm oxide and Co. (C) 2016 Author(s).
C1 [Shen, Y.; Leontsev, S.] Univ Dayton, Dayton, OH 45469 USA.
[Shen, Y.; Leontsev, S.; Sheets, A. O.; Horwath, J. C.; Turgut, Z.] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Sheets, A. O.] UES Inc, Dayton, OH 45432 USA.
RP Shen, Y (reprint author), Univ Dayton, Dayton, OH 45469 USA.; Shen, Y (reprint author), Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
NR 18
TC 0
Z9 0
U1 8
U2 11
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 2158-3226
J9 AIP ADV
JI AIP Adv.
PD MAY
PY 2016
VL 6
IS 5
AR 056005
DI 10.1063/1.4943015
PG 7
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Physics, Applied
SC Science & Technology - Other Topics; Materials Science; Physics
GA DO7KX
UT WOS:000377962500174
ER
PT J
AU Grap, MJ
Munro, CL
Wetzel, PA
Schubert, CM
Pepperl, A
Burk, RS
Lucas, V
AF Grap, Mary Jo
Munro, Cindy L.
Wetzel, Paul A.
Schubert, Christine M.
Pepperl, Anathea
Burk, Ruth S.
Lucas, Valentina
TI BACKREST ELEVATION AND TISSUE INTERFACE PRESSURE BY ANATOMICAL LOCATION
DURING MECHANICAL VENTILATION
SO AMERICAN JOURNAL OF CRITICAL CARE
LA English
DT Article
ID CRITICAL-CARE PATIENTS; CRITICALLY-ILL; BODY POSITION; BRADEN SCALE;
RISK-FACTOR; SORE RISK; ULCERS; PNEUMONIA; SYSTEM; APACHE
AB Background Backrest elevations less than 30 degrees are recommended to reduce pressure ulcers, but positions greater than 30 degrees are recommended during mechanical ventilation to reduce risk for ventilator-associated pneumonia. Interface pressure may vary with level of backrest elevation and anatomical location (eg, sacrum, heels).
Objective To describe backrest elevation and anatomical location and intensity of skin pressure across the body in patients receiving mechanical ventilation.
Methods In a longitudinal study, patients from 3 adult intensive care units in a single institution receiving mechanical ventilation were enrolled within 24 hours of intubation from February 2010 through May 2012. Backrest elevation (by inclinometer) and pressure (by a pressure-mapping system) were measured continuously for 72 hours. Mean tissue interface pressure was determined for 7 anatomical areas: left and right scapula, left and right trochanter, sacrum, and left and right heel.
Results Data on 133 patients were analyzed. For each 1 degrees increase in backrest elevation, mean interface pressure decreased 0.09 to 0.42 mm Hg. For each unit increase in body mass index, mean trochanter pressure increased 0.22 to 0.24 mm Hg. Knee angle (lower extremity bent at the knee) and mobility were time-varying covariates in models of the relationship between backrest elevation and tissue interface pressure.
Conclusions Individual factors such as patient movement and body mass index may be important elements related to risk for pressure ulcers and ventilator-associated pneumonia, and a more nuanced approach in which positioning decisions are tailored to optimize outcomes for individual patients appears warranted.
C1 [Grap, Mary Jo; Burk, Ruth S.] Sch Nursing, Adult Hlth & Nursing Syst Dept, Richmond, VA USA.
[Wetzel, Paul A.; Pepperl, Anathea] Sch Engn, Dept Biomed Engn, Richmond, VA USA.
[Lucas, Valentina] Virginia Commonwealth Univ, Dept Surg, Richmond, VA USA.
[Munro, Cindy L.] Univ S Florida, Coll Nursing, Res & Innovat, Tampa, FL USA.
[Schubert, Christine M.] US Air Force, Inst Technol, Dept Math & Stat, Dayton, OH USA.
RP Grap, MJ (reprint author), 1000 Lady Jean Ct, Midlothian, VA 23114 USA.
EM mjgrap@vcu.edu
FU National Institutes of Health [R01 NR010381]
FX This study was supported by National Institutes of Health grant R01
NR010381 to Dr Mary Jo Grap.
NR 27
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U1 1
U2 1
PU AMER ASSOC CRITICAL CARE NURSES
PI ALISO VIEJO
PA 101 COLUMBIA, ALISO VIEJO, CA 92656 USA
SN 1062-3264
EI 1937-710X
J9 AM J CRIT CARE
JI Am. J. Crit. Care
PD MAY 1
PY 2016
VL 25
IS 3
BP E56
EP E63
DI 10.4037/ajcc2016317
PG 8
WC Critical Care Medicine; Nursing
SC General & Internal Medicine; Nursing
GA DO2AT
UT WOS:000377582500003
PM 27134239
ER
PT J
AU Gruneisen, MT
Sickmiller, BA
Flanagan, MB
Black, JP
Stoltenberg, KE
Duchane, AW
AF Gruneisen, Mark T.
Sickmiller, Brett A.
Flanagan, Michael B.
Black, James P.
Stoltenberg, Kurt E.
Duchane, Alexander W.
TI Adaptive spatial filtering of daytime sky noise in a satellite quantum
key distribution downlink receiver (vol 55, 026104, 2016)
SO OPTICAL ENGINEERING
LA English
DT Correction
C1 [Gruneisen, Mark T.; Duchane, Alexander W.] US Air Force, Res Lab, Directed Energy Directorate, 3550 Aberdeen Ave SE, Kirtland AFB, NM 87117 USA.
[Sickmiller, Brett A.; Flanagan, Michael B.] Leidos, 2109 Air Pk Rd SE, Albuquerque, NM 87106 USA.
[Black, James P.; Stoltenberg, Kurt E.] Boeing Co, POB 5670, Albuquerque, NM 87185 USA.
RP Gruneisen, MT (reprint author), US Air Force, Res Lab, Directed Energy Directorate, 3550 Aberdeen Ave SE, Kirtland AFB, NM 87117 USA.
NR 1
TC 0
Z9 0
U1 6
U2 6
PU SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA
SN 0091-3286
EI 1560-2303
J9 OPT ENG
JI Opt. Eng.
PD MAY
PY 2016
VL 55
IS 5
AR 059801
DI 10.1117/1.OE.55.5.059801
PG 1
WC Optics
SC Optics
GA DO2DB
UT WOS:000377588800039
ER
PT J
AU Ferguson, D
Crabtree, P
White, S
Vayner, B
AF Ferguson, Dale
Crabtree, Peter
White, Stephen
Vayner, Boris
TI Anomalous Global Positioning System Power Degradation from Arc-Induced
Contamination
SO JOURNAL OF SPACECRAFT AND ROCKETS
LA English
DT Article
ID PHOTOCHEMICALLY DEPOSITED CONTAMINATION; SOLAR-ARRAY; SPACECRAFT;
SATELLITES
AB It is well known that many GPS satellites have experienced power degradation in excess of what would be expected from radiation damage on their solar arrays. Originally, contamination was suspected, based on the time behavior and rate of degradation seen. Calorimeters were included on some satellites, and a temperature rise commensurate with the power loss was detected, but subsequent efforts to eliminate line-of-sight paths from the contamination sources were unfruitful in reducing the power degradation. The hypothesis put forward here is that the contamination is the result of solar array arcing over a GPS lifetime. In this paper, we examine this hypothesis, using known characteristics of space solar array arcs, to place limits on the arc rate that would be sufficient to produce the contamination-induced power losses seen on GPS satellites to date. Comparisons with United States Nuclear Detonation Detection System signals on GPS satellites are consistent with at least some of the United States Nuclear Detonation Detection System events being solar array arcs. If the hypothesis can be confirmed, simple measures to prevent arcing on GPS arrays can lower the contamination rate and either increase end-of-life power or allow reduced beginning-of-life power.
C1 [Ferguson, Dale] US Air Force, Res Lab, Spacecaft Charging Sci & Technol, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
[Crabtree, Peter; White, Stephen] US Air Force, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
[Vayner, Boris] Ohio Aerosp Inst, Brookpark, OH 44135 USA.
RP Ferguson, D (reprint author), US Air Force, Res Lab, Spacecaft Charging Sci & Technol, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
EM dale.ferguson.1@us.af.mil; peter.crabtree.6@us.af.mil;
stephen.white.24@us.af.mil; boris.v.vayner@nasa.gov
NR 18
TC 0
Z9 0
U1 1
U2 1
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0022-4650
EI 1533-6794
J9 J SPACECRAFT ROCKETS
JI J. Spacecr. Rockets
PD MAY
PY 2016
VL 53
IS 3
BP 464
EP 470
DI 10.2514/1.A33438
PG 7
WC Engineering, Aerospace
SC Engineering
GA DN8YM
UT WOS:000377365800007
ER
PT J
AU Robinson, JB
Richie, DJ
AF Robinson, Joseph B.
Richie, David J.
TI Stabilization and Attitude Determination Methods for FalconSAT-3
SO JOURNAL OF SPACECRAFT AND ROCKETS
LA English
DT Article
ID VECTOR OBSERVATIONS; ALGORITHM; TRIAD
AB FalconSAT-3 is a cadet-built and -operated satellite that was launched in 2007. In late 2014, cadets successfully stabilized the satellite for the first time through an operational test campaign using a B-dot controller. This paper describes the many challenges in attitude stabilization and determination, and the solutions provided to achieve partial mission capability of two payloads with a magnetometer as the only sensor. Due to problems with onboard sun sensors, engineers have used solar panel currents to create a sun vector to perform a full three-axis attitude determination. This paper compares two different methods for determining the sun vector from solar panel currents and uses the triad method to perform a three-axis attitude determination. A discussion of the key lessons learned from the cadet-run satellite operations is also included.
C1 [Robinson, Joseph B.; Richie, David J.] US Air Force Acad, Dept Astronaut, 2354 Fairchild Dr, Colorado Springs, CO 80840 USA.
[Robinson, Joseph B.; Richie, David J.] US Air Force, Washington, DC USA.
RP Robinson, JB (reprint author), US Air Force Acad, Dept Astronaut, 2354 Fairchild Dr, Colorado Springs, CO 80840 USA.
NR 14
TC 0
Z9 0
U1 0
U2 0
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0022-4650
EI 1533-6794
J9 J SPACECRAFT ROCKETS
JI J. Spacecr. Rockets
PD MAY
PY 2016
VL 53
IS 3
BP 507
EP 519
DI 10.2514/1.A33362
PG 13
WC Engineering, Aerospace
SC Engineering
GA DN8YM
UT WOS:000377365800012
ER
PT J
AU Alba, CR
Greendyke, RB
AF Alba, Christopher R.
Greendyke, Robert B.
TI Nonequilibrium Finite-Rate Carbon Ablation Model for Earth Reentry Flows
SO JOURNAL OF SPACECRAFT AND ROCKETS
LA English
DT Article
ID MODULATED MOLECULAR-BEAMS; PYROLYTIC-GRAPHITE; OXIDATION; OXYGEN; PLANE
C1 [Alba, Christopher R.; Greendyke, Robert B.] US Air Force, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
RP Alba, CR (reprint author), US Air Force, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
FU Air Force Office of Scientific Research
FX The authors would like to thank John Schmisseur who sponsored this work
under a grant from the Air Force Office of Scientific Research. The
authors would also like to thank Steve Lewis, Richard Morgan, and
Timothy McIntyre from the University of Queensland for providing the X-2
shock expansion tunnel data used for comparisons. The views and
conclusions contained herein are those of the authors and should not be
interpreted as necessarily representing the official policies or
endorsements, either expressed or implied, of the Air Force Office of
Scientific Research or the U.S. Government.
NR 20
TC 0
Z9 0
U1 1
U2 1
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0022-4650
EI 1533-6794
J9 J SPACECRAFT ROCKETS
JI J. Spacecr. Rockets
PD MAY
PY 2016
VL 53
IS 3
BP 579
EP 583
DI 10.2514/1.A33399
PG 5
WC Engineering, Aerospace
SC Engineering
GA DN8YM
UT WOS:000377365800019
ER
PT J
AU Mostajeran, C
Warner, M
Ware, TH
White, TJ
AF Mostajeran, Cyrus
Warner, Mark
Ware, Taylor H.
White, Timothy J.
TI Encoding Gaussian curvature in glassy and elastomeric liquid crystal
solids
SO PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING
SCIENCES
LA English
DT Article
DE nematic; elastomers; solids; curvature
ID NON-EUCLIDEAN PLATES; POLYMER NETWORKS; TOPOLOGY; METRICS; SHEETS; SHAPE
AB We describe shape transitions of thin, solid nematic sheets with smooth, preprogrammed, in-plane director fields patterned across the surface causing spatially inhomogeneous local deformations. A metric description of the local deformations is used to study the intrinsic geometry of the resulting surfaces upon exposure to stimuli such as light and heat. We highlight specific patterns that encode constant Gaussian curvature of prescribed sign and magnitude. We present the first experimental results for such programmed solids, and they qualitatively support theory for both positive and negative Gaussian curvature morphing from flat sheets on stimulation by light or heat. We review logarithmic spiral patterns that generate cone/anti-cone surfaces, and introduce spiral director fields that encode non-localized positive and negative Gaussian curvature on punctured discs, including spherical caps and spherical spindles. Conditions are derived where these cap-like, photomechanically responsive regions can be anchored in inert substrates by designing solutions that ensure compatibility with the geometric constraints imposed by the surrounding media. This integration of such materials is a precondition for their exploitation in new devices. Finally, we consider the radial extension of such director fields to larger sheets using nematic textures defined on annular domains.
C1 [Mostajeran, Cyrus] Univ Cambridge, Dept Engn, Cambridge CB2 1PZ, England.
[Warner, Mark] Univ Cambridge, Cavendish Lab, 19 JJ Thomson Ave, Cambridge CB3 0HE, England.
[Ware, Taylor H.; White, Timothy J.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Ware, Taylor H.] Univ Texas Dallas, Dept Bioengn, 800 W Campbell Rd, Richardson, TX 75080 USA.
RP Warner, M (reprint author), Univ Cambridge, Cavendish Lab, 19 JJ Thomson Ave, Cambridge CB3 0HE, England.
EM mw141@cam.ac.uk
RI Ware, Taylor/A-7130-2017;
OI Ware, Taylor/0000-0001-7996-7393; Warner, Mark/0000-0003-3172-0265
FU Engineering and Physical Sciences Research Council of the United
Kingdom; Materials and Manufacturing Directorate of the Air Force
Research Laboratory; Air Force Office of Scientific Research
FX C.M. is supported by the Engineering and Physical Sciences Research
Council of the United Kingdom. T.J.W. and T.H.W. acknowledge financial
support from the Materials and Manufacturing Directorate of the Air
Force Research Laboratory and the Air Force Office of Scientific
Research.
NR 29
TC 1
Z9 1
U1 6
U2 12
PU ROYAL SOC
PI LONDON
PA 6-9 CARLTON HOUSE TERRACE, LONDON SW1Y 5AG, ENGLAND
SN 1364-5021
EI 1471-2946
J9 P ROY SOC A-MATH PHY
JI Proc. R. Soc. A-Math. Phys. Eng. Sci.
PD MAY 1
PY 2016
VL 472
IS 2189
AR 20160112
DI 10.1098/rspa.2016.0112
PG 16
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA DO3ZL
UT WOS:000377721200016
PM 27279777
ER
PT J
AU Harker, BM
Neilsen, TB
Gee, KL
Wall, AT
James, MM
AF Harker, Blaine M.
Neilsen, Tracianne B.
Gee, Kent L.
Wall, Alan T.
James, Michael M.
TI Spatiotemporal-Correlation Analysis of Jet Noise from a High-Performance
Military Aircraft
SO AIAA JOURNAL
LA English
DT Article
ID FIELD ACOUSTICAL-HOLOGRAPHY; HIGH-SPEED JETS; SOURCE LOCATION
AB Correlation analyses of ground-based acoustic-pressure measurements of noise from a tethered F-22A provide insights into the sound-field characteristics with position and engine condition. Time-scaled single-point (auto) correlation functions show that, to the side of the nozzle exit, the temporal-correlation envelope decays rapidly, whereas the envelope decays more slowly in the maximum radiation region and farther downstream. This type of spatial variation has been previously attributed to a transition from fine-to large-scale mixing noise in laboratory-scale jets. Two-point space-time (cross) correlation functions demonstrate that noise from a single engine operating at intermediate power is similar to that from a heated, convectively subsonic laboratory-scale jet, whereas additional features are seen at afterburner, relative to supersonic laboratory jets. A complementary coherence analysis provides estimates of coherence lengths as a function of frequency and location. Acoustic coherence lengths across the ground microphone array are used to analyze one-dimensional, equivalent-source-coherence lengths obtained from the DAMAS-C beamforming algorithm. The source coherence reaches its maximum downstream of the maximum source level, suggesting that uncorrelated sources meaningfully contribute to the dominant source region. In addition to revealing further the nature of the sound field near an advanced tactical engine, the characteristics seen should be useful as a phenomenological comparison point for those trying to model military-scale results both experimentally and numerically.
C1 [Harker, Blaine M.; Neilsen, Tracianne B.; Gee, Kent L.] Brigham Young Univ, Dept Phys & Astron, N283 ESC, Provo, UT 84602 USA.
[Wall, Alan T.] US Air Force Res Lab, Battlespace Acoust Branch, AFRL 711 HPW RHCB, Wright Patterson AFB, OH 45433 USA.
[James, Michael M.] Blue Ridge Res & Consulting LLC, 29 N Market St,Suite 700, Asheville, NC 28801 USA.
RP Harker, BM (reprint author), Brigham Young Univ, Dept Phys & Astron, N283 ESC, Provo, UT 84602 USA.
FU Office of Naval Research; U.S. Air Force Research Laboratory (USAFRL)
through the Small Business Innovation Research program; Blue Ridge
Research and Consulting, Brigham Young University; U.S. Air Force
FX The authors gratefully acknowledge the funding for this analysis from
the Office of Naval Research. The measurements were funded by the U.S.
Air Force Research Laboratory (USAFRL) through the Small Business
Innovation Research program, and supported through a cooperative
research and development agreement between Blue Ridge Research and
Consulting, Brigham Young University, and the U.S. Air Force. This
research was supported in part by the appointment of Blaine Harker to
the Student Research Participation Program at USAFRL, 711th Human
Performance Wing, Human Effectiveness Directorate, Warfighter Interface
Branch, Battlespace Acoustics Branch administered by the Oak Ridge
Institute for Science and Education through an interagency agreement
between the U.S. Department of Energy and USAFRL. Distribution A:
Approved for public release; distribution unlimited. 88ABW Cleared 23
April 2015; 88ABW-2015-2059.
NR 56
TC 0
Z9 0
U1 5
U2 5
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0001-1452
EI 1533-385X
J9 AIAA J
JI AIAA J.
PD MAY
PY 2016
VL 54
IS 5
BP 1554
EP 1566
DI 10.2514/1.J054442
PG 13
WC Engineering, Aerospace
SC Engineering
GA DN6SA
UT WOS:000377205000009
ER
PT J
AU Granlund, KO
Ol, MV
Jones, AR
AF Granlund, Kenneth O.
Ol, Michael V.
Jones, Anya R.
TI Streamwise Oscillation of Airfoils into Reverse Flow
SO AIAA JOURNAL
LA English
DT Article; Proceedings Paper
CT 53rd AIAA Aerospace Sciences Meeting / AIAA Atmospheric Flight Mechanics
Conference / 17th AIAA Non-Deterministic Approaches Conference / AIAA
Science and Technology Forum / AIAA Infotech at Aerospace Conference
CY JAN 05-09, 2015
CL Kissimmee, FL
SP AIAA
ID AERODYNAMICS; NUMBER
AB A NACA 0012 airfoil is oscillated in streamwise direction in a constant freestream and at a fixed incidence angle such that reverse flow occurs cyclically. Force measurements reveal that lift is close to unsteady theory while advancing into the freestream, if the angle of attack permits attached flow. Lift is augmented at large angles of attack, where the flow is separated under steady conditions, and does not become appreciatively negative in flow reversal for either attached or separated flow, contrary to one unsteady theory but supported by another. Dye flow visualization reveals a coherent vortical structure upstream of the leading edge before flow reversal, which is believed to attenuate negative lift.
C1 [Granlund, Kenneth O.] N Carolina State Univ, Dept Mech & Aerosp Engn, Raleigh, NC 27695 USA.
[Ol, Michael V.] US Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
[Jones, Anya R.] Univ Maryland, Dept Aerosp Engn, College Pk, MD 20742 USA.
RP Granlund, KO (reprint author), N Carolina State Univ, Dept Mech & Aerosp Engn, Raleigh, NC 27695 USA.
NR 19
TC 0
Z9 0
U1 1
U2 1
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0001-1452
EI 1533-385X
J9 AIAA J
JI AIAA J.
PD MAY
PY 2016
VL 54
IS 5
BP 1628
EP 1636
DI 10.2514/1.J054674
PG 9
WC Engineering, Aerospace
SC Engineering
GA DN6SA
UT WOS:000377205000015
ER
PT J
AU Sauerwein, TJ
True, MW
AF Sauerwein, Tom J.
True, Mark W.
TI The Diabetes Center of Excellence: A Model to Emulate
SO MILITARY MEDICINE
LA English
DT Editorial Material
C1 [Sauerwein, Tom J.] JBSA Lackland, Air Force Diabet Ctr Excellence, 59th Med Wing,2200 Bergquist Dr, Lackland AFB, TX 78236 USA.
[True, Mark W.] JBSA Ft Sam Houston, 59th Med Wing,3551 Roger Brooke Dr, Ft Sam Houston, TX 78234 USA.
RP Sauerwein, TJ (reprint author), JBSA Lackland, Air Force Diabet Ctr Excellence, 59th Med Wing,2200 Bergquist Dr, Lackland AFB, TX 78236 USA.
NR 5
TC 0
Z9 0
U1 0
U2 0
PU ASSOC MILITARY SURG US
PI BETHESDA
PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 USA
SN 0026-4075
EI 1930-613X
J9 MIL MED
JI Milit. Med.
PD MAY
PY 2016
VL 181
IS 5
BP 407
EP 409
DI 10.7205/MILMED-D-15-00007
PG 3
WC Medicine, General & Internal
SC General & Internal Medicine
GA DN5MZ
UT WOS:000377114400005
PM 27136646
ER
PT J
AU Tvaryanas, AP
Maupin, GM
Fouts, BL
AF Tvaryanas, Anthony P.
Maupin, Genny M.
Fouts, Brittany L.
TI A 10-Year Cross-Sectional Analysis of Air Force Flight and Operational
Medicine Clinic Health Care Services
SO MILITARY MEDICINE
LA English
DT Article
AB Objectives: This study described the patient population and the health care services delivered in the Air Force Flight and Operational Medicine Clinics (FOMCs) over the past 10 years. Methods: A cross-sectional analysis was performed on the retrospective cohort of patients who received care at a FOMC from 2003 to 2012. Results: A total of 714,157 individuals, generating 4,829,626 encounters, were included in the cohort. They were predominately male service members under the age of 41. One-fifth of individuals were retirees and family members, with one-third being in the pediatric age range. The cohort accessed health care services for three primary reasons: health examinations (28%), occupational dispositions (18%), and primary care (54%). When primary care was sought, the predominate health conditions were upper respiratory infections, back problems, and nontraumatic joint disorders. When services and procedures were a component of the care, they were predominately associated with health examinations involving ophthalmologic, auditory, and cardiac screening tests. Individuals accessing the FOMCs had relatively low need for access to health care services, requiring a median of two annual encounters. Conclusions: This study provided insight into the health care delivered in FOMCs and establishes a foundation for future planning and management of FOMC health care delivery.
C1 [Tvaryanas, Anthony P.] Human Syst Integrat Directorate, 711th Human Performance Wing,2510 Fifth St, Wright Patterson AFB, OH 45433 USA.
[Maupin, Genny M.; Fouts, Brittany L.] US Air Force, Sch Aerosp Med, Aeromed Res Dept, 2510 Fifth St,Bldg 840, Wright Patterson AFB, OH 45433 USA.
RP Tvaryanas, AP (reprint author), Human Syst Integrat Directorate, 711th Human Performance Wing,2510 Fifth St, Wright Patterson AFB, OH 45433 USA.
FU Air Force Defense Health Programs
FX This research was supported in part by an appointment to the Student
Research Participation Program at the An Force Research Laboratory,
711th Human Performance Wing (AFRIL/HPW) administered by the Oak Ridge
Institute for Science and Education through an interagency agreement
between the U.S. Department of Energy and AFRL. This research project
was accomplished using Air Force Defense Health Programs research funds.
NR 7
TC 0
Z9 0
U1 1
U2 1
PU ASSOC MILITARY SURG US
PI BETHESDA
PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 USA
SN 0026-4075
EI 1930-613X
J9 MIL MED
JI Milit. Med.
PD MAY
PY 2016
VL 181
IS 5
BP 424
EP 433
DI 10.7205/MILMED-D-15-00086
PG 10
WC Medicine, General & Internal
SC General & Internal Medicine
GA DN5MZ
UT WOS:000377114400007
PM 27136648
ER
PT J
AU Saldanha, V
Yi, F
Lewis, JD
Ingalls, NK
AF Saldanha, Vilas
Yi, Fia
Lewis, Jeffrey D.
Ingalls, Nichole K.
TI Staying at the Cutting Edge: Partnership With a Level 1 Trauma Center
Improves Clinical Currency and Wartime Readiness for Military Surgeons
SO MILITARY MEDICINE
LA English
DT Article
ID TRANSFUSION; OUTCOMES; CARE
AB Introduction: Surgical currency is a critical component of medical corps readiness. We report a review of surgeons embedded into a civilian institution and analyze whether this improves surgical currency and wartime readiness. Methods: Patient management and operative volume were acquired from four surgeons embedded at a civilian institution and compared to operative case loads of surgeons based at a military treatment facility (MTF). Results: The surgeons embedded in the civilian institution had a mean of 49.3 cases compared to a mean of 8.3 cases for surgeons at the MTF over this 6-month period. In addition, the embedded surgeons obtained 44.4 to 94.7% of these cases during their civilian experience as opposed to cases done at the MTF. The cases performed by the embedded orthopedic surgeon (n = 247) was over 20 times the mean number of cases (mean = 12) performed at the MTF. Over a 6-month period, the trauma surgeon and general surgeon each evaluated 150 and 170 new trauma patients, respectively. In addition, the trauma/critical care surgeon cared for 250 critical care patients over this same 6-month period. Conclusion: This study demonstrates that embedding surgeons into a civilian institution allows them to maintain skill sets critical for currency and wartime readiness.
C1 [Saldanha, Vilas; Lewis, Jeffrey D.; Ingalls, Nichole K.] Mike OCallaghan Fed Med Ctr, Med Grp 99, 4700 North Las Vegas Blvd, Nellis AFB, NV 89191 USA.
[Yi, Fia] Joint Base San Antonio, San Antonio Mil Med Ctr, Med Grp 959, 2080 Wilson Rd, San Antonio, TX 78234 USA.
RP Saldanha, V (reprint author), Mike OCallaghan Fed Med Ctr, Med Grp 99, 4700 North Las Vegas Blvd, Nellis AFB, NV 89191 USA.
NR 14
TC 0
Z9 0
U1 0
U2 0
PU ASSOC MILITARY SURG US
PI BETHESDA
PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 USA
SN 0026-4075
EI 1930-613X
J9 MIL MED
JI Milit. Med.
PD MAY
PY 2016
VL 181
IS 5
BP 459
EP 462
DI 10.7205/MILMED-D-15-00080
PG 4
WC Medicine, General & Internal
SC General & Internal Medicine
GA DN5MZ
UT WOS:000377114400012
PM 27136653
ER
PT J
AU Osborne, JR
Ramji, SA
Carter, CD
Peltier, S
Hammack, S
Lee, T
Steinberg, AM
AF Osborne, Jeffrey R.
Ramji, Sarah A.
Carter, Campbell D.
Peltier, Scott
Hammack, Stephen
Lee, Tonghun
Steinberg, Adam M.
TI Simultaneous 10 kHz TPIV, OH PLIF, and CH2O PLIF measurements of
turbulent flame structure and dynamics
SO EXPERIMENTS IN FLUIDS
LA English
DT Article
ID PARTICLE IMAGE VELOCIMETRY; PREMIXED FLAMES; TOMOGRAPHIC-PIV; FRONT
STRUCTURE; JET FLAME; STEREOSCOPIC PIV; BUNSEN FLAMES; COMBUSTION;
FORMALDEHYDE; ENGINE
AB Simultaneous 10 kHz repetition-rate tomographic particle image velocimetry, hydroxyl planar laser-induced fluorescence (OH PLIF), and formaldehyde (CH2 O) PLIF were used to study the structure and dynamics of turbulent premixed flames. The flames investigated span from the classically defined corrugated flamelet regime to conditions at which broadened and/ or broken flamelets are expected. Methods are presented for determining 3D flame topologies from the Mie scattering tomography and for tracking features through space and time using theoretical Lagrangian particles. Substantial broadening of the CH2 O region is observed with increasing turbulence intensity. However, OH production remains rapid, and the region of OH and CH2O overlap remains thin. Local flame speeds exceeding three times the laminar flame speed are observed in regions of flame-flame interaction. Furthermore, a method of tracking fluid residence time within the CH2O layer is presented and shows that residence time decreases at higher turbulence intensity despite the broader distribution of the CH2O, indicating an increase in local reaction rate.
C1 [Osborne, Jeffrey R.; Ramji, Sarah A.; Steinberg, Adam M.] Univ Toronto, Inst Aerosp Studies, Toronto, ON, Canada.
[Carter, Campbell D.; Peltier, Scott] Wright Patterson Air Force Base, Air Force Res Lab, Dayton, OH USA.
[Hammack, Stephen; Lee, Tonghun] Univ Illinois, Dept Mech Sci & Engn, Urbana, IL 61801 USA.
RP Osborne, JR (reprint author), Univ Toronto, Inst Aerosp Studies, Toronto, ON, Canada.
EM josborne@utias.utoronto.ca; sramji@utias.utoronto.ca;
campbell.carter@us.af.mil; scott.peltier.5@us.af.mil;
shammac2@illinois.edu; tonghun@illinois.edu; adam.steinberg@utoronto.ca
FU US Air Force Office of Scientific Research [FA9550-13-1-0070]; NSERC
[RGPIN 413232]; AFOSR [FA9550-14-1-0343]
FX This work was sponsored by the US Air Force Office of Scientific
Research under Grant No. FA9550-13-1-0070, Project Monitor Dr. Chiping
Li, and NSERC under Grant No. RGPIN 413232. Travel for Stephen Hammack
was supported using AFOSR Grant FA9550-14-1-0343.
NR 61
TC 2
Z9 2
U1 10
U2 19
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0723-4864
EI 1432-1114
J9 EXP FLUIDS
JI Exp. Fluids
PD MAY
PY 2016
VL 57
IS 5
AR 65
DI 10.1007/s00348-016-2151-7
PG 19
WC Engineering, Mechanical; Mechanics
SC Engineering; Mechanics
GA DM3XL
UT WOS:000376279900005
ER
PT J
AU Loftis, AD
Kelly, PJ
Paddock, CD
Blount, K
Johnson, JW
Gleim, ER
Yabsley, MJ
Levin, ML
Beati, L
AF Loftis, Amanda D.
Kelly, Patrick J.
Paddock, Christopher D.
Blount, Keith
Johnson, Jason W.
Gleim, Elizabeth R.
Yabsley, Michael J.
Levin, Michael L.
Beati, Lorenza
TI Panola Mountain Ehrlichia in Amblyomma maculatum From the United States
and Amblyomma variegatum (Acari: Ixodidae) From the Caribbean and Africa
SO JOURNAL OF MEDICAL ENTOMOLOGY
LA English
DT Article
DE Africa; Amblyomma; Caribbean; Ehrlichia; tick
ID TICK; RUMINANTIUM; INFECTION; USA; AMERICANUM; HISTORY; GEORGIA; FEVER
AB Panola Mountain Ehrlichia (PME) has been suggested as an emerging pathogen of humans and dogs. Domestic goats and white-tailed deer (Odocoileus virginianus) are also susceptible and likely serve as reservoirs. Experimentally, both the lone star tick (Amblyomma americanum (L.)) and the Gulf Coast tick (Amblyomma maculatum Koch) can transmit PME among deer and goats. In the current study, we detected PME in adult wild-caught A. maculatum from the United States and Amblyomma variegatum (F.) from the Caribbean and Africa. This significantly expands the range, potential tick vectors, and risk for exposure to PME.
C1 [Loftis, Amanda D.; Kelly, Patrick J.] Ross Univ, Sch Vet Med, POB 334, Basseterre, St Kitts, St Kitts & Nevi.
[Paddock, Christopher D.; Levin, Michael L.] Ctr Dis Control & Prevent, 1600 Clifton Rd NE, Atlanta, GA 30333 USA.
[Blount, Keith] US Air Force Acad, Dept Biol, Colorado Springs, CO 80840 USA.
[Johnson, Jason W.] Lincoln Mem Univ, Coll Vet Med, 6965 Cumberland Gap Pkwy, Harrogate, TN 37752 USA.
[Gleim, Elizabeth R.; Yabsley, Michael J.] Univ Georgia, Warnell Sch Forestry & Nat Resources, Athens, GA 30602 USA.
[Gleim, Elizabeth R.; Yabsley, Michael J.] Univ Georgia, Coll Vet Med, Dept Populat Hlth, Southeastern Cooperat Wildlife Dis Study, 589 DW Brooks Dr, Athens, GA 30602 USA.
[Gleim, Elizabeth R.] Joseph W Jones Ecol Res Ctr Ichauway, Newton, GA USA.
[Beati, Lorenza] Georgia So Univ, US Natl Tick Collect, Georgia Ave Bldg 204,POB 8056, Statesboro, GA 30460 USA.
RP Loftis, AD (reprint author), Ross Univ, Sch Vet Med, POB 334, Basseterre, St Kitts, St Kitts & Nevi.
EM adloftis@gmail.com; PKelly@rossvet.edu.kn; cdp9@cdc.gov;
keith.blount@usafa.edu; jason.johnson@LMUnet.edu; egleim@gmail.com;
myabsley@uga.edu; msl3@cdc.gov; lorenzabeati@georgiasouthern.edu
FU Ross University School of Veterinary Medicine; Centers for Disease
Control and Prevention (CDC); USDA NIFA TSTAR program
[2010-34135-21018]; NSF grant [DEB-NSF 1026146]; CDC/University of
Georgia (UGA) [8212]; Joseph W. Jones Ecological Research Center;
Warnell School of Forestry and Natural Resources (UGA); Southeastern
Cooperative Wildlife Disease Study (SCWDS) (UGA) through the Federal Aid
to Wildlife Restoration Act [50 Stat. 917]; Southeastern Cooperative
Wildlife Disease Study (SCWDS) (UGA) through the SCWDS sponsorship
FX We would like to thank Jerome Goddard, Lance Durden, Kerry Clark, and
the staff at the Joseph W. Jones Ecological Research Center for
assistance with tick collecting; Helene Lucas, Jennifer Sidge, Floyd
Revan, and Susyn Kelly, for their technical assistance; and Mike Connor
for his advice and guidance to E. Gleim. Support was provided by an
intramural grant from Ross University School of Veterinary Medicine, by
the Centers for Disease Control and Prevention (CDC), and the USDA NIFA
TSTAR program (2010-34135-21018). L. Beati was in part supported through
NSF grant DEB-NSF 1026146. E. Gleim and M. Yabsley were funded by
CDC/University of Georgia (UGA) collaborative grant 8212, the Joseph W.
Jones Ecological Research Center, Warnell School of Forestry and Natural
Resources (UGA), and the Southeastern Cooperative Wildlife Disease Study
(SCWDS) (UGA) through the Federal Aid to Wildlife Restoration Act (50
Stat. 917) and through SCWDS sponsorship from fish and wildlife agencies
of member states. The findings and conclusions are those of the authors
and do not necessarily represent the official position of the Centers
for Disease Control and Prevention.
NR 14
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U2 1
PU OXFORD UNIV PRESS INC
PI CARY
PA JOURNALS DEPT, 2001 EVANS RD, CARY, NC 27513 USA
SN 0022-2585
EI 1938-2928
J9 J MED ENTOMOL
JI J. Med. Entomol.
PD MAY
PY 2016
VL 53
IS 3
BP 696
EP 698
DI 10.1093/jme/tjv240
PG 3
WC Entomology; Veterinary Sciences
SC Entomology; Veterinary Sciences
GA DM6II
UT WOS:000376454800031
PM 26744465
ER
PT J
AU Pakmehr, M
Fitzgerald, N
Feron, E
Paduano, J
Behbahani, A
AF Pakmehr, Mehrdad
Fitzgerald, Nathan
Feron, Eric
Paduano, James
Behbahani, Alireza
TI Physics-Based Dynamic Modeling of a Turboshaft Engine Driving a Variable
Pitch Propeller
SO JOURNAL OF PROPULSION AND POWER
LA English
DT Article
ID JET; PERFORMANCE
AB A physics-based dynamic model of a twin-spool turboshaft engine that drives a variable pitch propeller is developed. The primary purpose for the development of this model is for researchers to use it to develop new engine control algorithms and study/predict off-design transient responses of gas turbine propulsion systems. In this model, the dynamics of the engine are defined to be the two spool speeds, and the control inputs are defined to be the fuel flow rate and the propeller pitch angle. Mockups of the turboshaft engine and the variable pitch propeller are developed using CAD software, and based on the mockups, a test stand for gas turbine engine static tests is developed. Experimental results are used to verify the dynamic model of the JetCat SPT5 turboshaft engine with a variable pitch propeller mounted on it. Based on experimental data, realistic performance maps of the engine components, including the high-pressure compressor, high-and low-pressure turbines, and variable pitch propeller are constructed and integrated in the model. The developed engine model is then validated with experimental results for various propeller pitch angles. The engine numerical model is implemented using MATLAB, and open-loop simulation results for large throttle commands are presented.
C1 [Pakmehr, Mehrdad; Feron, Eric] Georgia Inst Technol, Sch Aerosp Engn, Atlanta, GA 30332 USA.
[Fitzgerald, Nathan; Paduano, James] Aurora Flight Sci Corp, Manassas, VA 20110 USA.
[Behbahani, Alireza] US Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Pakmehr, M; Feron, E (reprint author), Georgia Inst Technol, Sch Aerosp Engn, Atlanta, GA 30332 USA.; Fitzgerald, N; Paduano, J (reprint author), Aurora Flight Sci Corp, Manassas, VA 20110 USA.; Behbahani, A (reprint author), US Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
EM mehrdad.pakmehr@gatech.edu; nfitz@alum.mit.edu; feron@gatech.edu;
jpaduano@aurora.aero; al.behbahani@wpafb.af.mil
FU U.S. Air Force Research Laboratory [FA9550-10-C-0039]; National Science
Foundation [1135955]
FX This material is based upon the work supported by the U.S. Air Force
Research Laboratory under contract FA9550-10-C-0039, and also the
National Science Foundation under grant 1135955. Special thanks to the
Massachusetts Institute of Technology Gas Turbine Laboratory for
providing the space for our experiments. The authors would also like to
express their gratitude to the reviewers for providing insightful
comments on the paper.
NR 35
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U1 4
U2 9
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0748-4658
EI 1533-3876
J9 J PROPUL POWER
JI J. Propul. Power
PD MAY
PY 2016
VL 32
IS 3
BP 646
EP 658
DI 10.2514/1.B35163
PG 13
WC Engineering, Aerospace
SC Engineering
GA DM9GH
UT WOS:000376672600011
ER
PT J
AU Fotia, ML
Schauer, F
Kaemming, T
Hoke, J
AF Fotia, Matthew L.
Schauer, Fred
Kaemming, Tom
Hoke, John
TI Experimental Study of the Performance of a Rotating Detonation Engine
with Nozzle
SO JOURNAL OF PROPULSION AND POWER
LA English
DT Article
ID SELF-OSCILLATORY EJECTION; OXIDIZER; REGIME; AIR
AB A rotating detonation engine is experimentally tested with various nozzle configurations for the purpose of measuring the propulsive performance of these devices in terms of thrust and specific impulse. Particular attention is given to comparing different internal nozzle configurations, which include bluff body, aerospike, and choked aerospike arrangements. The nozzle throat exit choke present in the rotating detonation engine exhaust is analyzed to provide insight into the stagnation pressure gain nature of the device.
C1 [Fotia, Matthew L.] US Air Force Res Lab, AFRL RQTC, Natl Res Council, Wright Patterson AFB, OH 45433 USA.
[Schauer, Fred] US Air Force Res Lab, AFRL RQTC, Wright Patterson AFB, OH 45433 USA.
[Kaemming, Tom; Hoke, John] Innovat Sci Solut Inc, Dayton, OH 45459 USA.
RP Fotia, ML (reprint author), US Air Force Res Lab, AFRL RQTC, Natl Res Council, Wright Patterson AFB, OH 45433 USA.
EM matt.fotia@gmail.com
NR 12
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Z9 2
U1 7
U2 18
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0748-4658
EI 1533-3876
J9 J PROPUL POWER
JI J. Propul. Power
PD MAY
PY 2016
VL 32
IS 3
BP 674
EP 681
DI 10.2514/1.B35913
PG 8
WC Engineering, Aerospace
SC Engineering
GA DM9GH
UT WOS:000376672600013
ER
PT J
AU Forbes, JA
Williams, J
Awad, AJ
Tiger, M
Anderson, B
Finnan, R
AF Forbes, Jonathan A.
Williams, Jason
Awad, Ahmed J.
Tiger, Michael
Anderson, Brett
Finnan, Ryan
TI Use of Intramedullary K-Wire to Enhance Fibular Graft Placement in
4-Level Thoracolumbar Corpectomy for Pott Disease: Case Report and
Review of Literature
SO WORLD NEUROSURGERY
LA English
DT Review
DE Fibular autograft; Graft kickout; Pott disease; Thoracolumbar corpectomy
ID SPINAL TUBERCULOSIS; POSTERIOR INSTRUMENTATION; RETROSPECTIVE ANALYSIS;
ANTERIOR; MANAGEMENT; FUSION; DEBRIDEMENT; KYPHOSIS
AB BACKGROUND: Reports of tuberculosis involving >= 4 contiguous spinal levels are rare. Surgery is often required in this population for neurological decompression and stabilization. These patients appear to be particularly predisposed to complications that include incomplete recovery of neurological function after decompression as well as post-treatment kyphosis. In settings with limited available instrumentation, reconstruction of the anterior column can be challenging.
CASE DESCRIPTION: A 35-year-old woman presented with back pain, progressive weakness in her bilateral lower extremities, and inability to walk for 2 months. Imaging demonstrated anterior destruction of T10, T11, T12, and L1 with severe retropulsion and cord impingement at T11-T12. The patient was taken for anterolateral corpectomies of T10-L1 with decompression of the thoracic spinal cord and fibular strut autograft placement followed by a T8 to L3 posterior spinal fusion. An intramedullary Kirschner-wire (K-wire) was placed during the anterolateral procedure to enhance fibular graft placement and prevent dislodgement before definitive posterior fusion.
CONCLUSIONS: At follow-up five-and-a-half months after the operation, the patient had recovered full strength and was ambulating without difficulty. Imaging at this time demonstrated stable restoration of alignment without graft dislodgement. Intramedullary fibular K-wire placement in this procedure helped to optimize anterior column reconstruction. The principles used in this report may prove beneficial to surgeons in developing countries who encounter pathology of this extent.
C1 [Forbes, Jonathan A.] David Grant Med Ctr, Dept Neurol Surg, Travis AFB, CA USA.
[Williams, Jason] David Grant Med Ctr, Dept Cardiothorac Surg, Travis AFB, CA USA.
[Tiger, Michael] David Grant Med Ctr, Dept Anesthesiol, Travis AFB, CA USA.
[Anderson, Brett] US Air Force Acad, Dept Orthoped Surg, Colorado Springs, CO 80840 USA.
[Finnan, Ryan] Univ Cincinnati, Med Ctr, Dept Orthoped Surg, Cincinnati, OH 45267 USA.
[Awad, Ahmed J.] An Najah Natl Univ, Fac Med & Hlth Sci, Nablus, Israel.
RP Forbes, JA (reprint author), David Grant Med Ctr, Dept Neurol Surg, Travis AFB, CA USA.
EM jonathan.a.forbes@gmail.com
NR 22
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Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 1878-8750
EI 1878-8769
J9 WORLD NEUROSURG
JI World Neurosurg.
PD MAY
PY 2016
VL 89
BP 404
EP 411
DI 10.1016/j.wneu.2016.02.026
PG 8
WC Clinical Neurology; Surgery
SC Neurosciences & Neurology; Surgery
GA DM6GM
UT WOS:000376448700055
PM 26875650
ER
PT J
AU Cycyota, CS
Ferrante, CJ
Schroeder, JM
AF Cycyota, Cynthia S.
Ferrante, Claudia J.
Schroeder, Jessica M.
TI Corporate social responsibility and employee volunteerism: What do the
best companies do?
SO BUSINESS HORIZONS
LA English
DT Article
DE Corporate Social Responsibility; Employee volunteerism; Stakeholder
engagement; Corporate reputation; Community involvement; Organizational
Citizenship Behavior
ID COMMUNITY INVOLVEMENT; SUPPORT; CANADA; AGENDA; CSR
AB Employee volunteerism as a practice of corporate social responsibility aids corporations by strengthening employee satisfaction and retention internally and by strengthening corporate reputations and connections with stakeholders externally. Of particular interest are the specific practices and procedures used by companies to encourage and support volunteer activities of their employees. We reviewed publicly available documents of Fortune's 100 Best Companies to Work For ranking to gain insight into how these best companies practice employee volunteerism and whether they link employee volunteerism to their corporate social responsibility strategy. We propose a connection of the position and importance of employee volunteerism in the corporate practices of social responsibility. Our findings suggest that many highly regarded companies specifically link employee volunteerism to their corporate social responsibility strategy. These companies also utilize similar practices to encourage and support employee volunteerism. We highlight the practices that managers could consider to support their corporate social responsibility efforts and offer several suggestions for future consideration. (C) 2016 Kelley School of Business, Indiana University. Published by Elsevier Inc. All rights reserved.
C1 [Cycyota, Cynthia S.; Ferrante, Claudia J.; Schroeder, Jessica M.] US Air Force Acad, HQ USAFA DFM, 2354 Fairchild Dr,Suite 6H-130, Usaf Acad, CO 80840 USA.
RP Cycyota, CS (reprint author), US Air Force Acad, HQ USAFA DFM, 2354 Fairchild Dr,Suite 6H-130, Usaf Acad, CO 80840 USA.
EM cynthia.cycyota@usafa.edu; claudia.ferrante@usafa.edu;
jessica.schroeder@usafa.edu
NR 31
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U1 17
U2 36
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0007-6813
EI 1873-6068
J9 BUS HORIZONS
JI Bus. Horiz.
PD MAY-JUN
PY 2016
VL 59
IS 3
BP 321
EP 329
DI 10.1016/j.bushor.2016.01.004
PG 9
WC Business
SC Business & Economics
GA DM2ZS
UT WOS:000376217200010
ER
PT J
AU Tassev, VL
Vangala, SR
Peterson, RD
Kimani, MM
Snure, M
Stites, RW
Guha, S
Slagle, JE
Ensley, TR
Syed, AA
Markov, IV
AF Tassev, Vladimir L.
Vangala, Shivashankar R.
Peterson, Rita D.
Kimani, Martin M.
Snure, Michael
Stites, Ronald W.
Guha, Shekhar
Slagle, Jonathan E.
Ensley, Trenton R.
Syed, Akbar A.
Markov, Ivan V.
TI Heteroepitaxial growth of OPGaP on OPGaAs for frequency conversion in
the IR and THz
SO OPTICAL MATERIALS EXPRESS
LA English
DT Article
ID GAP; GAAS; SUPERLATTICES; ABSORPTION; FILMS
AB For the first time thick orientation-patterned GaP (OPGaP) was repeatedly grown heteroepitaxially on OPGaAs templates as a quasi-phase matched medium for frequency conversion in the mid and longwave IR, and THz regions. The OP templates were fabricated by wafer-bonding and in a MBE-assisted polarity inversion process. Standard low-pressure hydride vapor phase epitaxy (LP-HVPE) was used for one-step growth of up to 400 mu m thick device quality OPGaP with excellent domain fidelity. The presented results can be viewed as the missing link between a well-developed technique for preparation of OP templates, using one robust nonlinear optical material (GaAs), and the subsequent thick epitaxial growth on them of another material (GaP). The reason for these efforts is that the second material has some indisputable advantages in point of view of thermal and optical properties but the preparation of native templates encounters challenges, which makes it difficult to obtain high quality homoepitaxial growth at an affordable price. Successful heteroepitaxial growth at such a relatively high lattice mismatch (- 3.6%) in a close to equilibrium growth process such as HVPE is noteworthy, especially when previously reported attempts, for example, growth of OPZnSe on OPGaAs templates at about 10 times smaller lattice mismatch (+ 0.3%) have produced only limited results. Combining the advantages of the two most promising nonlinear materials, GaAs and GaP, is a solution that will accelerate the development of high power, tunable laser sources for the IR and THz region, which are in great demand on the market. (C) 2016 Optical Society of America.
C1 [Tassev, Vladimir L.; Vangala, Shivashankar R.; Peterson, Rita D.; Kimani, Martin M.; Snure, Michael; Stites, Ronald W.; Guha, Shekhar; Slagle, Jonathan E.] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Vangala, Shivashankar R.] SURVICE Eng Co, Dayton, OH 45431 USA.
[Kimani, Martin M.] WYLE, Aerosp Grp, 909 W Inyokern Rd Suite C, Ridgecrest, CA 93555 USA.
[Ensley, Trenton R.; Syed, Akbar A.] Univ Cent Florida, Coll Opt & Photon, CREOL, Orlando, FL 32816 USA.
[Ensley, Trenton R.] US Army, Res Lab, Adelphi, MD 20783 USA.
[Markov, Ivan V.] Bulgarian Acad Sci, Inst Phys Chem, Sofia, Bulgaria.
RP Tassev, VL (reprint author), US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
EM vladimir.tassev@wpafb.af.mil
FU Air Force Office for Scientific Research [13RY09COR]
FX This research was supported by the Air Force Office for Scientific
Research under funding 13RY09COR. The authors are very thankful to Prof.
Eric Van Stryland and Prof. David Hagan from UCF for the part of the
optical measurements conducted at CREOL.
NR 45
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U1 1
U2 1
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 2159-3930
J9 OPT MATER EXPRESS
JI Opt. Mater. Express
PD MAY 1
PY 2016
VL 6
IS 5
BP 1724
EP 1737
DI 10.1364/OME.6.001724
PG 14
WC Materials Science, Multidisciplinary; Optics
SC Materials Science; Optics
GA DM3JF
UT WOS:000376242000033
ER
PT J
AU Snure, M
Vangala, S
Walker, D
AF Snure, Michael
Vangala, Shivashankar
Walker, Dennis, Jr.
TI Probing phonon and electrical anisotropy in black phosphorus for device
alignment
SO OPTICAL MATERIALS EXPRESS
LA English
DT Article
ID FIELD-EFFECT TRANSISTORS; TRANSPORT-PROPERTIES; PHOTORESPONSE;
ORIENTATION; DEPENDENCE
AB Black phosphorus has emerged as a promising two-dimensional semiconductor, which has a unique structure that is anisotropic in-plane. This structural anisotropy translates to some very interesting orientation dependent properties. In this paper we present directional characterization and analysis of the phonon and electrical properties in black phosphorus. Using polarization dependent Raman we show a simple method for estimating orientation. A complementary radially contacted field effect transistor (FET) was fabricated in order to measure orientation dependent electrical properties. Mobility and transconductance followed a sinusoidal like dependence on orientation with a 30% anisotropy. Correlating these results with Raman, we show how Raman methods might be used as a nondestructive technique to orient black phosphorus devices. (C) 2016 Optical Society of America.
C1 [Snure, Michael; Vangala, Shivashankar; Walker, Dennis, Jr.] US Air Force, Res Lab, Sensors Directorate, Dayton, OH 45433 USA.
[Vangala, Shivashankar] SURVICE Engn, Dayton, OH 45431 USA.
RP Snure, M (reprint author), US Air Force, Res Lab, Sensors Directorate, Dayton, OH 45433 USA.
EM michael.snure.1@us.af.mil
FU Air Force Office of Scientific Research [16RYCOR331]
FX The authors would like to thank Timothy Prusnick for his help. This work
is funded by Air Force Office of Scientific Research under task number
16RYCOR331, Program Manager Dr. Kenneth Goretta. This support is
gratefully acknowledged.
NR 24
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U1 9
U2 19
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 2159-3930
J9 OPT MATER EXPRESS
JI Opt. Mater. Express
PD MAY 1
PY 2016
VL 6
IS 5
BP 1751
EP 1756
DI 10.1364/OME.6.001751
PG 6
WC Materials Science, Multidisciplinary; Optics
SC Materials Science; Optics
GA DM3JF
UT WOS:000376242000036
ER
PT J
AU Tiley, J
Rice, T
AF Tiley, Jaimie
Rice, Thomas
TI UNDERSTANDING THE AIR FORCE OFFICE OF SCIENTIFIC RESEARCH GRANT PROCESS
SO ADVANCED MATERIALS & PROCESSES
LA English
DT Article
C1 [Tiley, Jaimie] US Air Force, Res Lab, 2230 10th St, Dayton, OH 45433 USA.
RP Tiley, J (reprint author), US Air Force, Res Lab, 2230 10th St, Dayton, OH 45433 USA.
EM jaimie.tiley@us.af.mil
NR 3
TC 0
Z9 0
U1 1
U2 1
PU ASM INT
PI MATERIALS PARK
PA SUBSCRIPTIONS SPECIALIST CUSTOMER SERVICE, MATERIALS PARK, OH 44073-0002
USA
SN 0882-7958
EI 2161-9425
J9 ADV MATER PROCESS
JI Adv. Mater. Process.
PD MAY
PY 2016
VL 174
IS 5
BP 31
EP 36
PG 6
WC Materials Science, Multidisciplinary
SC Materials Science
GA DL6II
UT WOS:000375742500010
ER
PT J
AU Chou, B
Mirau, P
Jiang, T
Wang, SW
Shea, KJ
AF Chou, Beverly
Mirau, Peter
Jiang, Tian
Wang, Szu-Wen
Shea, Kenneth J.
TI Tuning Hydrophobicity in Abiotic Affinity Reagents: Polymer Hydrogel
Affinity Reagents for Molecules with Lipid-like Domains
SO BIOMACROMOLECULES
LA English
DT Article
ID HEPARIN-MIMICKING POLYMER; ENDOTOXIN REMOVAL; NMR-SPECTROSCOPY; TOXIC
PEPTIDE; GROWTH-FACTOR; NANOPARTICLES; PROTEINS; PURIFICATION;
MICROGELS; RELEASE
AB Hydrophobic interactions often dominate the associative forces between biomacromolecules. A synthetic affinity reagent must be able to exploit and optimize these interactions. We describe synthesis of abiotic affinity reagents that sequester biomacromolecules with lipid-like domains. NIPAm-based copolymer nanoparticles (NPs) containing C4-C8 hydrophobic groups were evaluated for their affinity for lipopolysaccharides (LPS), the lipophilic component of the outer membrane of Gram-negative bacteria. Optimal affinity was found for NPs incorporating a linear C4 hydrocarbon group. 1D and 2D H-1 NMR studies revealed that in water, the longer chain (C6 and C8) alkyl groups in the hydrogel NPs were engaged in intrachain association, rendering them less available to interact with LPS. Optimal LPS-NP interaction requires maximizing hydrophobicity, while avoiding side chain aggregation. Polymer compositions with high LPS binding were grafted onto agarose beads and evaluated for LPS clearance from solution; samples containing linear C4 groups also showed the highest LPS clearance capacity.
C1 [Chou, Beverly; Shea, Kenneth J.] Univ Calif Irvine, Dept Chem, Irvine, CA 92697 USA.
[Mirau, Peter] US Air Force, Air Force Mat Command, Air Force Res Lab, Soft Matter Mat Branch AFRL RXAS, Wright Patterson AFB, OH 45433 USA.
[Jiang, Tian; Wang, Szu-Wen] Univ Calif Irvine, Dept Chem Engn & Mat Sci, Irvine, CA 92697 USA.
RP Shea, KJ (reprint author), Univ Calif Irvine, Dept Chem, Irvine, CA 92697 USA.
EM kjshea@uci.edu
FU National Science Foundation [DMR-1308363]
FX We wish to acknowledge the National Science Foundation (DMR-1308363) for
financial support of this research. We would also like to acknowledge
Dr. Gratton and the Laboratory of Fluorescence Dynamics (LFD) at the
University of California, Irvine (UCI) for help with fluorescence
polarization; the Laser Spectroscopy Facility (UCI); Richard Que for
assistance with LCST curve fits; and Dr. Keiichi Yoshimatsu for helpful
discussions.
NR 37
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Z9 0
U1 17
U2 28
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1525-7797
EI 1526-4602
J9 BIOMACROMOLECULES
JI Biomacromolecules
PD MAY
PY 2016
VL 17
IS 5
BP 1860
EP 1868
DI 10.1021/acs.biomac.6b00296
PG 9
WC Biochemistry & Molecular Biology; Chemistry, Organic; Polymer Science
SC Biochemistry & Molecular Biology; Chemistry; Polymer Science
GA DL8IU
UT WOS:000375886500032
PM 27064286
ER
PT J
AU Meredith, LS
Eisenman, DP
Han, B
Green, BL
Kaltman, S
Wong, EC
Sorbero, M
Vaughan, C
Cassells, A
Zatzick, D
Diaz, C
Hickey, S
Kurz, JR
Tobin, JN
AF Meredith, Lisa S.
Eisenman, David P.
Han, Bing
Green, Bonnie L.
Kaltman, Stacey
Wong, Eunice C.
Sorbero, Melony
Vaughan, Christine
Cassells, Andrea
Zatzick, Douglas
Diaz, Claudia
Hickey, Scot
Kurz, Jeremy R.
Tobin, Jonathan N.
TI Impact of Collaborative Care for Underserved Patients with PTSD in
Primary Care: a Randomized Controlled Trial
SO JOURNAL OF GENERAL INTERNAL MEDICINE
LA English
DT Article
DE PTSD; primary care; community based interventions; mental health;
medicaid
ID POSTTRAUMATIC-STRESS-DISORDER; ABUSE SCREENING-TEST; ANXIETY DISORDERS;
HEALTH CENTERS; PSYCHIATRIC-DISORDERS; IMPROVE TREATMENT;
CLINICAL-TRIAL; DEPRESSION; MANAGEMENT; PREVALENCE
AB The effectiveness of collaborative care of mental health problems is clear for depression and growing but mixed for anxiety disorders, including posttraumatic stress disorder (PTSD). We know little about whether collaborative care can be effective in settings that serve low-income patients such as Federally Qualified Health Centers (FQHCs).
We compared the effectiveness of minimally enhanced usual care (MEU) versus collaborative care for PTSD with a care manager (PCM).
This was a multi-site patient randomized controlled trial of PTSD care improvement over 1 year.
We recruited and enrolled 404 patients in six FQHCs from June 2010 to October 2012. Patients were eligible if they had a primary care appointment, no obvious physical or cognitive obstacles to participation, were age 18-65 years, planned to continue care at the study location for 1 year, and met criteria for a past month diagnosis of PTSD.
The main outcomes were PTSD diagnosis and symptom severity (range, 0-136) based on the Clinician-Administered PTSD Scale (CAPS). Secondary outcomes were medication and counseling for mental health problems, and health-related quality of life assessed at baseline, 6 months, and 12 months.
Patients in both conditions improved similarly over the 1-year evaluation period. At 12 months, PTSD diagnoses had an absolute decrease of 56.7 % for PCM patients and 60.6 % for MEU patients. PTSD symptoms decreased by 26.8 and 24.2 points, respectively. MEU and PCM patients also did not differ in process of care outcomes or health-related quality of life. Patients who actually engaged in care management had mental health care visits that were 14 % higher (p < 0.01) and mental health medication prescription rates that were 15.2 % higher (p < 0.01) than patients with no engagement.
A minimally enhanced usual care intervention was similarly effective as collaborative care for patients in FQHCs.
C1 [Meredith, Lisa S.; Eisenman, David P.; Han, Bing; Wong, Eunice C.; Vaughan, Christine; Hickey, Scot] RAND Corp, 1776 Main St, Santa Monica, CA 90407 USA.
[Meredith, Lisa S.] VA HSR&D Ctr Study Healthcare Innovat Implementat, Sepulveda, CA USA.
[Eisenman, David P.] Univ Calif Los Angeles, David Geffen Sch Med, Dept Med, Div Gen Internal Med & Hlth Serv Res, Los Angeles, CA 90095 USA.
[Green, Bonnie L.; Kaltman, Stacey] Georgetown Univ, Med Ctr, Dept Psychiat, Washington, DC 20007 USA.
[Sorbero, Melony] RAND Corp, Pittsburgh, PA USA.
[Cassells, Andrea; Tobin, Jonathan N.] Clin Directors Network, New York, NY USA.
[Zatzick, Douglas] Univ Washington, Sch Med, Dept Psychiat & Behav Sci, Harborview Injury Prevent & Res Ctr, Seattle, WA 98195 USA.
[Diaz, Claudia] Univ New Mexico, Albuquerque, NM 87131 USA.
[Kurz, Jeremy R.] US Air Force, Esther, FL USA.
[Tobin, Jonathan N.] Yeshiva Univ Albert Einstein Coll Med, Dept Epidemiol & Populat Hlth, 1300 Morris Pk Ave, Bronx, NY 10461 USA.
[Tobin, Jonathan N.] Rockefeller Univ, Ctr Clin & Translat Sci, 1230 York Ave, New York, NY 10021 USA.
RP Meredith, LS (reprint author), RAND Corp, 1776 Main St, Santa Monica, CA 90407 USA.
EM lisa_meredith@rand.org
FU National Institute of Mental Health/NIMH [R01MH082768, R01MH082768-02S1,
R01MH082768-04S1]
FX This research was supported by a grant to Dr. Meredith from the National
Institute of Mental Health/NIMH (R01MH082768, R01MH082768-02S1,
R01MH082768-04S1).
NR 56
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Z9 3
U1 2
U2 6
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0884-8734
EI 1525-1497
J9 J GEN INTERN MED
JI J. Gen. Intern. Med.
PD MAY
PY 2016
VL 31
IS 5
BP 509
EP 517
DI 10.1007/s11606-016-3588-3
PG 9
WC Health Care Sciences & Services; Medicine, General & Internal
SC Health Care Sciences & Services; General & Internal Medicine
GA DJ8KO
UT WOS:000374461400014
PM 26850413
ER
PT J
AU McKenzie, R
Vlassopoulos, D
AF McKenzie, Ruel
Vlassopoulos, Dimitris
TI Rheological diagnostic tools for state transitions
SO JOURNAL OF RHEOLOGY
LA English
DT Article
ID AMPLITUDE OSCILLATORY SHEAR; LIQUID-CRYSTALLINE POLYMER; CROSS-LINKING
POLYMER; PHASE-SEPARATION; VISCOELASTIC PROPERTIES; MICROPHASE
SEPARATION; BLOCK-COPOLYMERS; POLY(VINYL METHYL-ETHER);
MECHANICAL-PROPERTIES; DISORDER TRANSITION
AB Thermodynamic or kinetic state transitions of six polymeric systems were probed using rheology in isothermal and nonisothermal isochronal experiments. The polymeric systems were representative of three different types of transitions: Gelation, macrophase separation, and order-disorder transitions. A phenomenological dimensionless parameter termed the relative elasticity, R, was found to be particularly sensitive to these transitions and was finitely bound by the viscous limit and the elastic limit with values of zero and one, respectively. In addition, the (time or temperature) derivative of R and tan delta (with delta being the phase angle) proved to be more sensitive to transitions as compared to the respective pure values. When compared to other methods found in literature, these new phenomenological protocols are found to be robust while providing a convenient and precise means of detecting transitions. Hence, they may complement existing methods, whereas they are beneficial to industrial or other systems exhibiting multiple transitions due to their high sensitivity. (C) 2016 The Society of Rheology.
C1 [McKenzie, Ruel] Fdn Res & Technol Hellas FORTH, Inst Elect Struct & Laser, N Plastira 100, Iraklion 70013, Crete, Greece.
[Vlassopoulos, Dimitris] Fdn Res & Technol Hellas FORTH, Inst Elect Struct & Laser, N Plastira 100, Iraklion 71103, Crete, Greece.
[Vlassopoulos, Dimitris] Univ Crete, Dept Mat Sci & Technol, POB 2208, Iraklion 70013, Crete, Greece.
[McKenzie, Ruel] US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Vlassopoulos, D (reprint author), Fdn Res & Technol Hellas FORTH, Inst Elect Struct & Laser, N Plastira 100, Iraklion 71103, Crete, Greece.; Vlassopoulos, D (reprint author), Univ Crete, Dept Mat Sci & Technol, POB 2208, Iraklion 70013, Crete, Greece.
EM dvlasso@iesl.forth.gr
FU Michelin
FX This work was supported by Michelin. The authors would like to thank
Sarah Joandel and Bernard Cantaloube for discussions and for providing
the SBR samples and Salvatore Costanzo for providing data on the aqueous
hydroxypropylcellulose system.
NR 51
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U1 4
U2 8
PU JOURNAL RHEOLOGY AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 0148-6055
J9 J RHEOL
JI J. Rheol.
PD MAY-JUN
PY 2016
VL 60
IS 3
BP 367
EP 378
DI 10.1122/1.4943983
PG 12
WC Mechanics
SC Mechanics
GA DL8IZ
UT WOS:000375887000002
ER
PT J
AU Ogle, AD
Young, JA
AF Ogle, Alan D.
Young, James A.
TI USAF Special Tactics Operator Combat Exposure and Psychological Stress
SO MILITARY PSYCHOLOGY
LA English
DT Article
DE PTSD; combat; deployment; special operations; stigma
ID LARGE NONCLINICAL SAMPLE; POSTTRAUMATIC-STRESS; NORMATIVE DATA;
DEPRESSION; DISORDER; SOLDIERS; HEALTH; SCALES; PREVALENCE; DEPLOYMENT
AB Given the length of combat in Afghanistan, Iraq, Syria, and elsewhere, and the role special operations forces will continue to play, we believe it is imperative to gain understanding of the psychological "wear and tear" associated with sustained combat operations on these highly specialized, highly utilized personnel. This study focused on a seldom-studied group, Air Force Special Tactics (ST) operators, to assess combat exposure, current psychological stress, and preferences for support when needed. This study assessed symptoms of posttraumatic stress, depression, anxiety, sleep, anger, and perceptions of help seeking in 5 ST units. Data revealed that the majority of study participants report distress levels below clinical thresholds; however, 26% struggle with generalized stress/agitation and, at smaller percentages, other distress symptoms that have negative impact on work performance. Combat experiences were comparable or higher than Army and Marine maneuver forces, and greater amounts of exposure related to positive screening for a possible mental health disorder, generalized agitation, and posttraumatic symptoms; combat involving direct fighting and being in high-threat situations were also related to posttraumatic stress. Distress rates for Special Operations Weather personnel were higher. Attitudes toward mental health support were positive however, embedded assets were preferred over base clinic providers. We review these and other findings and offer suggestions for future research in this area.
C1 [Ogle, Alan D.] 497th Intelligence Surveillance & Reconnaissance, Operat Med Element, Joint Base Langley Eusti, VA USA.
[Young, James A.] 559th Med Grp, Mil Training Consult Serv, US Air Force Basic Mil Training, Joint Base San Antonio, TX USA.
RP Ogle, AD (reprint author), 497 ISRG, 586 Weyland Dr, Langley AFB, VA 23665 USA.
EM alan.ogle@us.af.mil
FU 711th Human Performance Wing, Wright Patterson AFB, OH
FX This study was supported in part by the 711th Human Performance Wing,
Wright Patterson AFB, OH. The authors wish to acknowledge Dr. Lynn
Caldwell for her review and input to this study.
NR 33
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Z9 0
U1 6
U2 9
PU AMER PSYCHOLOGICAL ASSOC
PI WASHINGTON
PA 750 FIRST ST NE, WASHINGTON, DC 20002-4242 USA
SN 0899-5605
EI 1532-7876
J9 MIL PSYCHOL
JI Milit. Psychol.
PD MAY
PY 2016
VL 28
IS 3
BP 123
EP 133
DI 10.1037/mil0000121
PG 11
WC Psychology, Multidisciplinary
SC Psychology
GA DL6ZL
UT WOS:000375788500001
ER
PT J
AU Shaaban, AM
Rezvani, M
Tubay, M
Elsayes, KM
Woodward, PJ
Menias, CO
AF Shaaban, Akram M.
Rezvani, Maryam
Tubay, Marc
Elsayes, Khaled M.
Woodward, Paula J.
Menias, Christine O.
TI Fat-containing Retroperitoneal Lesions: Imaging Characteristics,
Localization, and Differential Diagnosis
SO RADIOGRAPHICS
LA English
DT Article
ID RENAL-CELL CARCINOMA; RADIOLOGIC-PATHOLOGICAL CORRELATION;
CHEMICAL-SHIFT MRI; MINIMAL FAT; EXTRAMEDULLARY HEMATOPOIESIS;
EXTRAADRENAL PARAGANGLIOMAS; ADRENOCORTICAL CARCINOMA; ADRENAL ADENOMA;
CYSTIC-FIBROSIS; ADULT PATIENT
AB The complex anatomy of the retroperitoneum is reflected in the spectrum of neoplastic and nonneoplastic conditions that can occur in the retroperitoneum and appear as soft-tissue masses. The presence of fat within a retroperitoneal lesion is helpful in refining the differential diagnosis. Fat is easily recognized because of its characteristic imaging appearance. It typically is hyperechoic at ultrasonography and demonstrates low attenuation at computed tomography (-10 to -100 HU). Magnetic resonance imaging is a more ideal imaging modality because it has better soft-tissue image contrast and higher sensitivity for depicting (a) microscopic fat by using chemical shift imaging and (b) macroscopic fat by using fat-suppression techniques. Whether a lesion arises from a retroperitoneal organ or from the soft tissues of the retroperitoneal space (primary lesion) is determined by examining the relationship between the lesion and its surrounding structures. Multiple imaging signs help to determine the organ of origin, including the "beak sign," the "embedded organ sign," the "phantom (invisible) organ sign," and the "prominent feeding artery sign." Adrenal adenoma is the most common adrenal mass that contains microscopic fat, while myelolipoma is the most common adrenal mass that contains macroscopic fat. Other adrenal masses, such as pheochromocytoma and adrenocortical carcinoma, rarely contain fat. Renal angiomyolipoma is the most common fat-containing renal mass. Other fat-containing renal lesions, such as lipoma and liposarcoma, are rare. Fatty replacement of the pancreas and pancreatic lipomas are relatively common, whereas pancreatic teratomas are rare. Of the primary retroperitoneal fat-containing lesions, lipoma and liposarcoma are common, while other lesions are relatively rare. (C) RSNA, 2016
C1 [Shaaban, Akram M.; Rezvani, Maryam; Woodward, Paula J.] Univ Utah, Dept Radiol, 30 North 1900 East,1A71, Salt Lake City, UT 84132 USA.
[Tubay, Marc] USAF Acad, US Air Force Acad Med Clin, Imaging Dept, Colorado Springs, CO USA.
[Elsayes, Khaled M.] Univ Texas MD Anderson Canc Ctr, Dept Radiol, Houston, TX 77030 USA.
[Menias, Christine O.] Mayo Clin, Dept Radiol, Scottsdale, AZ USA.
RP Shaaban, AM (reprint author), Univ Utah, Dept Radiol, 30 North 1900 East,1A71, Salt Lake City, UT 84132 USA.
EM akram.shaaban@hsc.utah.edu
FU Amirsys
FX Activities related to the present article: disclosed no relevant
relationships. Activities not related to the present article: royalties
and consulting fees from Amirsys. Other activities: disclosed no
relevant relationships.
NR 90
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Z9 0
U1 0
U2 2
PU RADIOLOGICAL SOC NORTH AMERICA
PI OAK BROOK
PA 820 JORIE BLVD, OAK BROOK, IL 60523 USA
SN 0271-5333
J9 RADIOGRAPHICS
JI Radiographics
PD MAY-JUN
PY 2016
VL 36
IS 3
BP 710
EP 734
DI 10.1148/rg.2016150149
PG 25
WC Radiology, Nuclear Medicine & Medical Imaging
SC Radiology, Nuclear Medicine & Medical Imaging
GA DL7AS
UT WOS:000375791800006
PM 27163589
ER
PT J
AU Singleton, D
Carter, C
Pendleton, SJ
Brophy, C
Sinibaldi, J
Luginsland, JW
Brown, M
Stockman, E
Gundersen, MA
AF Singleton, Daniel
Carter, Campbell
Pendleton, Scott J.
Brophy, Christopher
Sinibaldi, Jose
Luginsland, John W.
Brown, Michael
Stockman, Emanuel
Gundersen, Martin A.
TI The effect of humidity on hydroxyl and ozone production by nanosecond
discharges
SO COMBUSTION AND FLAME
LA English
DT Article
DE Non-equilibrium plasma; Nanosecond pulsed power; Transient plasma
ignition; Planar laser induced florescence; Hydroxyl; Ozone
ID TRANSIENT PLASMA; IGNITION; COMBUSTION; OXYGEN; SPECTROSCOPY; MOLECULES;
CHEMISTRY; QUIESCENT; MIXTURES
AB The interplay of humidity and non-equilibrium, transient plasma was studied via ignition experiments in a C2H4-air mixture, concentration measurements in humid air, and detailed simulations. Hydroxyl (OH) and ozone (O-3) produced via non-equilibrium plasma were characterized in a flowing H2O-air mixture at atmospheric pressure with varying the levels of humidity using planar laser-induced fluorescence (PLIF) and UV absorption, respectively. The OH, which was created in the discharge streamers, peaked at a concentration of similar to 5x 10(14)/cm(3) and then decayed below 1 x 10(14)/cm(3) after similar to 100 mu s. O-3, which is long lived, peaked at a concentration of 1.4 x 10(15)/cm(3). An increase in humidity from X-H2O approximate to 0.2% to 1% resulted in a monotonic increase in the concentration of OH and a 67% decrease in that of O-3. Zero-dimensional Boltzmann modeling of non-equilibrium plasma discharges in humid air showed qualitative agreement with these results and points to the decrease in o concentration (with increasing humidity) as the reason for the decreased O-3 concentration. In spite the dramatic decline in X-O3 with increased humidity, there was no strong commensurate effect on ignition and flame propagation in C2H4-air mixtures: Peak pressure rise rate was at its maximum value at X-H2O = 1% but was only 25% less at X-H2O = 5%. (C) 2016 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
C1 [Singleton, Daniel; Pendleton, Scott J.; Gundersen, Martin A.] Univ So Calif, Los Angeles, CA 90089 USA.
[Carter, Campbell; Brown, Michael] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Brophy, Christopher; Sinibaldi, Jose] Naval Postgrad Sch, Monterey, CA 93943 USA.
[Luginsland, John W.] NumerEx, Ithaca, NY 14850 USA.
[Stockman, Emanuel] Princeton Univ, Princeton, NJ 08544 USA.
[Singleton, Daniel] Transient Plasma Syst, 1751 Torrance Blvd,Suite K, Torrance, CA 90501 USA.
[Pendleton, Scott J.] Old Dominion Univ, Norfolk, VA 23529 USA.
[Sinibaldi, Jose] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Luginsland, John W.] Air Force Off Sci Res, Arlington, VA 22203 USA.
RP Singleton, D (reprint author), Transient Plasma Syst, 1751 Torrance Blvd,Suite K, Torrance, CA 90501 USA.
EM dsinglet@usc.edu
OI Singleton, Daniel/0000-0001-5052-4409; Sinibaldi,
Jose/0000-0002-9871-0590; Stockman, Emanuel/0000-0002-4891-5184
NR 29
TC 0
Z9 0
U1 8
U2 13
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0010-2180
EI 1556-2921
J9 COMBUST FLAME
JI Combust. Flame
PD MAY
PY 2016
VL 167
BP 164
EP 171
DI 10.1016/j.combustflame.2016.02.016
PG 8
WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary;
Engineering, Chemical; Engineering, Mechanical
SC Thermodynamics; Energy & Fuels; Engineering
GA DK3FQ
UT WOS:000374802900013
ER
PT J
AU Schuette, ML
Green, AJ
Leedy, K
Crespo, A
Tetlak, SE
Sutherlin, KA
Jessen, GH
AF Schuette, Michael L.
Green, Andrew J.
Leedy, Kevin
Crespo, Antonio
Tetlak, Stephen E.
Sutherlin, Karynn A.
Jessen, Gregg H.
TI Ionic Metal-Oxide TFTs for Integrated Switching Applications
SO IEEE TRANSACTIONS ON ELECTRON DEVICES
LA English
DT Article
DE Cutoff frequency; dc switch; gate charge; ionic semiconductors;
monolithic ICs; pulse measurements; RF switch; thin-film transistors
(TFTs); zinc oxide
ID THIN-FILM TRANSISTORS; TRANSPARENT
AB Disordered ionic-bonded transition metal oxide thin-film transistors (TFTs) show promise for a variety of dc and RF switching applications, especially those that can leverage their low-temperature, substrate-agnostic process integration potential. In this paper, enhancement-mode zinc-oxide TFTs were fabricated and their switching performance evaluated. These TFTs exhibit the drain-current density of 0.6 A/mm and minimal frequency dispersion, as evidenced by dynamic current-voltage tests. A high-frequency power switch figure of merit R-ON Q(G) of 359 m Omega . nC was experimentally determined for 0.75-mu m long-channel devices, and through scaling 45.9 m Omega . nC is achievable for 11 V-rated devices (where R-ON is ON-state drain-source resistance, and Q(G) is gate charge). An RF switch cutoff frequency f(c) of 25 GHz was measured for the same 0.75-mu m TFT, whereas f(c) exceeding 500 GHz and power handling in the tens of watts are projected with optimization.
C1 [Schuette, Michael L.; Green, Andrew J.; Leedy, Kevin; Crespo, Antonio; Tetlak, Stephen E.; Sutherlin, Karynn A.; Jessen, Gregg H.] US Air Force, Res Lab, Sensors Directorate, Aerosp Components Div,Devices Sensing Branch, Wright Patterson AFB, OH 45433 USA.
RP Schuette, ML; Green, AJ; Leedy, K; Crespo, A; Tetlak, SE; Sutherlin, KA; Jessen, GH (reprint author), US Air Force, Res Lab, Sensors Directorate, Aerosp Components Div,Devices Sensing Branch, Wright Patterson AFB, OH 45433 USA.
EM michael.schuette.1@us.af.mil; andrew.green.16.ctr@us.af.mil;
kevin.leedy@us.af.mil; antonio.crespo@us.af.mil;
stephen.tetlak@us.af.mil; karynn.sutherlin@us.af.mil;
gregg.jessen@us.af.mil
FU Defense Advanced Research Projects Agency
FX This work was supported by the Defense Advanced Research Projects
Agency.
NR 23
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Z9 0
U1 4
U2 4
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9383
EI 1557-9646
J9 IEEE T ELECTRON DEV
JI IEEE Trans. Electron Devices
PD MAY
PY 2016
VL 63
IS 5
BP 1921
EP 1927
DI 10.1109/TED.2016.2544200
PG 7
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA DK6BA
UT WOS:000375004500019
ER
PT J
AU Parthasarathy, TA
Przybyla, CP
Hay, RS
Cinibulk, MK
AF Parthasarathy, Triplicane A.
Przybyla, Craig P.
Hay, Randall S.
Cinibulk, Michael K.
TI Modeling Environmental Degradation of SiC-Based Fibers
SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY
LA English
DT Article
ID SILICON-CARBIDE FIBER; LOW-OXYGEN-CONTENT; HI-NICALON;
OXIDATION-KINETICS; HIGH-TEMPERATURE; THERMAL-STABILITY; WATER-VAPOR;
PASSIVE-OXIDATION; MATRIX COMPOSITE; TENSILE-STRENGTH
AB Experimental data on grain growth and oxidation kinetics of SiC-based fibers, as well as the accompanying strength degradation, in argon, air, and moist air are interpreted using a mechanistic model. The grain growth from thermal history is modeled using conventional models, and its influence on strength is modeled assuming that the flaw size scales with grain size. The model for fiber oxidation uses available relevant thermodynamic and kinetic data for reactions, vapor pressures, oxygen permeation, and boundary layer effects to capture scale thickness data reported by several prior works, in static or flowing air, moist air, and steam. The effect of the oxide scale on strength was modeled assuming that the flaw size scaled with scale thickness. The resulting model is compared with experimental data and is shown to capture most of the data in the literature on degradation of HiNicalon and HiNicalon type S fibers.
C1 [Parthasarathy, Triplicane A.; Przybyla, Craig P.; Hay, Randall S.; Cinibulk, Michael K.] US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Parthasarathy, Triplicane A.] UES Inc, Dayton, OH 45432 USA.
RP Parthasarathy, TA (reprint author), US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.; Parthasarathy, TA (reprint author), UES Inc, Dayton, OH 45432 USA.
EM Triplicane.Parthasarathy.ctr@us.af.mil
FU Teledyne Scientific; USAF Contract [FA8650-10-D-5226]; Air Force Office
of Scientific Research [14RX06COR]
FX One of the authors (TAP) acknowledges useful discussions with Dr. Brian
Cox and Dr. Dave Marshall, and partial financial support from Teledyne
Scientific. Useful discussions with Dr. J. DiCarlo of NASA(Glenn) are
also acknowledged. This work was supported by USAF Contract #
FA8650-10-D-5226, which was funded in part by the Air Force Office of
Scientific Research, task # 14RX06COR with Dr. David Stargel as the
program manager. The authors thank the reviewers for valuable
suggestions.
NR 53
TC 0
Z9 0
U1 6
U2 9
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0002-7820
EI 1551-2916
J9 J AM CERAM SOC
JI J. Am. Ceram. Soc.
PD MAY
PY 2016
VL 99
IS 5
BP 1725
EP 1734
DI 10.1111/jace.14086
PG 10
WC Materials Science, Ceramics
SC Materials Science
GA DK4AL
UT WOS:000374858500035
ER
PT J
AU Wrzesinski, PJ
Stauffer, HU
Schmidt, JB
Roy, S
Gord, JR
AF Wrzesinski, Paul J.
Stauffer, Hans U.
Schmidt, Jacob B.
Roy, Sukesh
Gord, James R.
TI Single-shot thermometry and OH detection via femtosecond fully resonant
electronically enhanced CARS (FREE-CARS)
SO OPTICS LETTERS
LA English
DT Article
ID STOKES-RAMAN-SCATTERING; FLAME THERMOMETRY; GAS-PHASE; DEGENERATE;
SPECTROSCOPY; TEMPERATURE
AB Femtosecond time-resolved, fully resonant electronically enhanced coherent anti-Stokes Raman scattering (FREE-CARS) spectroscopy, incorporating a two-color excitation scheme, is used to demonstrate selective and sensitive gas-phase detection of the hydroxyl (OH) radical in a reacting flow. Spectral resolution of the emitted FREE-CARS signal allows simultaneous detection of temperature and relative OH mole fraction under single-laser-shot conditions in a laminar ethylene-air flame. By comparison to previously reported OH concentration and temperature measurements, we demonstrate excellent single-shot temperature accuracies (similar to 2% deviation from adiabatic flame temperature) and precisions (similar to 2% standard deviation), with simultaneous relative OH concentration measurements that demonstrate high detection sensitivity (100-300 ppm).
C1 [Wrzesinski, Paul J.; Gord, James R.] Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
[Stauffer, Hans U.; Schmidt, Jacob B.; Roy, Sukesh] Spectral Energies LLC, 5100 Springfield St,Suite 301, Dayton, OH 45431 USA.
RP Stauffer, HU (reprint author), Spectral Energies LLC, 5100 Springfield St,Suite 301, Dayton, OH 45431 USA.
EM hans.stauffer@gmail.com
FU Air Force Research Laboratory (AFRL) [FA8650-15-D-2518]; Air Force
Office of Scientific Research (AFOSR) [LRIR: 14RQ06COR, LRIR:
15RQCOR202]
FX Air Force Research Laboratory (AFRL) (FA8650-15-D-2518); Air Force
Office of Scientific Research (AFOSR) (LRIR: 14RQ06COR, LRIR:
15RQCOR202).
NR 27
TC 3
Z9 3
U1 5
U2 13
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0146-9592
EI 1539-4794
J9 OPT LETT
JI Opt. Lett.
PD MAY 1
PY 2016
VL 41
IS 9
BP 2021
EP 2024
DI 10.1364/OL.41.002021
PG 4
WC Optics
SC Optics
GA DK6ZH
UT WOS:000375073900032
PM 27128064
ER
PT J
AU Larkin, SP
AF Larkin, Sean P.
TI The Age of Transparency International Relations Without Secrets
SO FOREIGN AFFAIRS
LA English
DT Article
C1 [Larkin, Sean P.] Council Foreign Relat, New York, NY 10065 USA.
[Larkin, Sean P.] US Air Force, Randolph AFB, TX 78150 USA.
[Larkin, Sean P.] US Air Force Headquarters, Randolph AFB, TX USA.
RP Larkin, SP (reprint author), Council Foreign Relat, New York, NY 10065 USA.; Larkin, SP (reprint author), US Air Force, Randolph AFB, TX 78150 USA.
NR 0
TC 0
Z9 0
U1 1
U2 3
PU COUNCIL FOREIGN RELAT IONS INC
PI NEW YORK
PA HAROLD PRATT HOUSE, 58 E 68TH ST, NEW YORK, NY 10065 USA
SN 0015-7120
J9 FOREIGN AFF
JI Foreign Aff.
PD MAY-JUN
PY 2016
VL 95
IS 3
BP 136
EP 146
PG 11
WC International Relations
SC International Relations
GA DJ4TT
UT WOS:000374201600015
ER
PT J
AU Murphy, N
AF Murphy, Neil
TI Untitled
SO SURFACE AND INTERFACE ANALYSIS
LA English
DT Biographical-Item
C1 [Murphy, Neil] Air Force Res Lab, Opt & Photon, 3005 Hobson Way, Wright Patterson AFB, OH 45433 USA.
RP Murphy, N (reprint author), Air Force Res Lab, Opt & Photon, 3005 Hobson Way, Wright Patterson AFB, OH 45433 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0142-2421
EI 1096-9918
J9 SURF INTERFACE ANAL
JI Surf. Interface Anal.
PD MAY
PY 2016
VL 48
IS 5
BP 248
EP 248
DI 10.1002/sia.5880
PG 1
WC Chemistry, Physical
SC Chemistry
GA DJ1AQ
UT WOS:000373935900002
ER
PT J
AU Fickus, M
Marks, JD
Poteet, MJ
AF Fickus, Matthew
Marks, Justin D.
Poteet, Miriam J.
TI A generalized Schur-Horn theorem and optimal frame completions
SO APPLIED AND COMPUTATIONAL HARMONIC ANALYSIS
LA English
DT Article
DE Schur-Horn; Frame
ID TIGHT FRAMES; OPTIMAL SEQUENCES; PRESCRIBED NORMS; SPECTRUM; MATRICES;
MAJORIZATION; EIGENVALUES; GENERATION; EXPANSIONS; ALGORITHMS
AB The Schur-Horn theorem is a classical result in matrix analysis which characterizes the existence of positive semidefinite matrices with a given diagonal and spectrum. In recent years, this theorem has been used to characterize the existence of finite frames whose elements have given lengths and whose frame operator has a given spectrum. We provide a new generalization of the Schur-Horn theorem which characterizes the spectra of all possible finite frame completions. That is, we characterize the spectra of the frame operators of the finite frames obtained by adding new vectors of given lengths to an existing frame. We then exploit this characterization to give a new and simple algorithm for computing the optimal such completion. Published by Elsevier Inc.
C1 [Fickus, Matthew; Poteet, Miriam J.] US Air Force, Inst Technol, Dept Math & Stat, Wright Patterson AFB, OH 45433 USA.
[Marks, Justin D.] Bowdoin Coll, Dept Math, Brunswick, ME 04011 USA.
RP Fickus, M (reprint author), US Air Force, Inst Technol, Dept Math & Stat, Wright Patterson AFB, OH 45433 USA.
EM Matthew.Fickus@gmail.com
FU NSF [DMS 1042701, DMS 1321779]
FX We thank the two anonymous reviewers for their many helpful comments and
suggestions. This work was partially supported by NSF DMS 1042701 and
NSF DMS 1321779. The views expressed in this article are those of the
authors and do not reflect the official policy or position of the United
States Air Force, Department of Defense, or the U.S. Government.
NR 28
TC 0
Z9 0
U1 4
U2 4
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 1063-5203
EI 1096-603X
J9 APPL COMPUT HARMON A
JI Appl. Comput. Harmon. Anal.
PD MAY
PY 2016
VL 40
IS 3
BP 505
EP 528
DI 10.1016/j.acha.2015.03.004
PG 24
WC Mathematics, Applied; Physics, Mathematical
SC Mathematics; Physics
GA DH4PF
UT WOS:000372767200003
ER
PT J
AU Scheible, M
Just, R
Sturk-Andreaggi, K
Saunier, J
Parson, W
Parsons, T
Coble, M
Irwin, J
AF Scheible, M.
Just, R.
Sturk-Andreaggi, K.
Saunier, J.
Parson, W.
Parsons, T.
Coble, M.
Irwin, J.
TI The mitochondrial landscape of African Americans: An examination of more
than 2500 control region haplotypes from 22 US locations
SO FORENSIC SCIENCE INTERNATIONAL-GENETICS
LA English
DT Article
DE Mitochondrial DNA; Control region; African American
ID GENETIC POPULATION-DATA; UNITED-STATES; HIGH-QUALITY; DNA; ANCESTRY;
SEQUENCES; ADMIXTURE; GUIDELINES; PUBLICATION; PROPORTIONS
AB The mitochondrial DNA (mtDNA) control region (16024-576) was Sanger-sequenced for a total of 2563 self-identified African Americans, using automated processing techniques and data review standards exceeding guidelines for forensic applications. Genetic diversity ranged from 0.9952 to 0.9998 in 22 population samples from 20 different states.
Haplogroups of African ancestry, found in 82.48% of individuals overall, were most concentrated in the Southeast U.S. and decreased to the north and west. West African and West Central African haplotypes were well-represented in the population samples, especially in the southern U.S. states, while East African haplogroups were observed in low-frequency clusters in a handful of locations across the country. East Asian, Native American, and West Eurasian admixture was present in 3.16%, 2.93%, and 11.43% of samples, respectively. While some geographic substructure was detected across the population samples as clines in admixture frequencies, 20 of the 22 population samples were found to be statistically indistinguishable by pairwise comparisons and AMOVA calculations. Datasets from Hawaii and Idaho, however, were clear outliers. Overall, these more than 2500 control region sequences represent the most comprehensive regional sampling of African American mtDNA diversity to date, and are suitable for use in a forensic mtDNA database. The population data are made available via EMPOP (www.empop.org) and GenBank. (C) 2016 Elsevier Ireland Ltd. All rights reserved.
C1 [Scheible, M.; Just, R.; Sturk-Andreaggi, K.; Saunier, J.; Parsons, T.; Coble, M.; Irwin, J.] Armed Forces DNA Identificat Lab, 115 Purple Heart Dr, Dover AFB, DE 19902 USA.
[Scheible, M.; Just, R.; Sturk-Andreaggi, K.; Saunier, J.; Parsons, T.; Coble, M.; Irwin, J.] Amer Registry Pathol, 9210 Corp Blvd,Suite 120, Rockville, MD 20850 USA.
[Parson, W.] Med Univ Innsbruck, Inst Legal Med, Mullerstr 44, A-6020 Innsbruck, Austria.
[Parson, W.; Parsons, T.] Penn State Eberly Coll Sci, 517 Thomas Bldg, University Pk, PA 16802 USA.
[Scheible, M.] N Carolina State Univ, Forens Sci Inst, 1060 William Moore Dr, Raleigh, NC 27607 USA.
[Scheible, M.] N Carolina State Univ, Dept Mol Biomed Sci, 1060 William Moore Dr, Raleigh, NC 27607 USA.
[Just, R.; Irwin, J.] Fed Bur Invest Acad, 2501 Invest Pkwy, Quantico, VA 22135 USA.
[Parsons, T.] Int Commiss Missing Persons, Alipasina 45A, Sarajevo 71000, Bosnia & Herceg.
[Coble, M.] NIST, 100 Bur Dr,M-S 8312, Gaithersburg, MD 20899 USA.
RP Scheible, M; Sturk-Andreaggi, K (reprint author), Armed Forces DNA Identificat Lab, 115 Purple Heart Dr, Dover AFB, DE 19902 USA.; Scheible, M; Sturk-Andreaggi, K (reprint author), Amer Registry Pathol, 9210 Corp Blvd,Suite 120, Rockville, MD 20850 USA.; Scheible, M (reprint author), N Carolina State Univ, Forens Sci Inst, 1060 William Moore Dr, Raleigh, NC 27607 USA.; Scheible, M (reprint author), N Carolina State Univ, Dept Mol Biomed Sci, 1060 William Moore Dr, Raleigh, NC 27607 USA.
EM mkscheib@ncsu.edu; kimberly.s.andreaggi.ctr@mail.mil
FU National Institute of Justice [2005-DN-R-086]
FX The authors would like to thank the Emerging Technologies Section, past
and present, especially Toni Diegoli, Elizabeth Lyons, Katharine
Strouss, Joanne Lee, Amanda Lehrmann, Kyla Harris, Brittany Box, Leslie
Mounkes, Erin Gorden, Rachel Kinsel, Morgan Falk, Naila Bhatri (AFDIL)
for data generation, analysis and review; Odile Loreille for ongoing
support and fruitful discussion; Charla Marshall (AFDIL) for assistance
with analyses; Liane Fendt, Theresa Harm, Gabriela Huber, Simone Nagl,
Daniela Niederwieser, Alexander Rock, Christina Strobl, and Bettina
Zimmermann (EMPOP, University of Innsbruck, Austria) for data analysis
and assistance with database confirmation; an anonymous reviewer and
John Buckleton for manuscript review and feedback; James Canik, Lanelle
Chisolm, Brion Smith, COL Louis Finelli, CAPT Edward Reedy, Lt Col Laura
Regan, Timothy McMahon, James Ross, Jon Norris, the American Registry of
Pathology and the Armed Forces Medical Examiner System for logistical,
administrative, and technical support; and the National Institute of
Justice (InterAgency Agreement 2005-DN-R-086) for funding.
NR 48
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U1 0
U2 7
PU ELSEVIER IRELAND LTD
PI CLARE
PA ELSEVIER HOUSE, BROOKVALE PLAZA, EAST PARK SHANNON, CO, CLARE, 00000,
IRELAND
SN 1872-4973
EI 1878-0326
J9 FORENSIC SCI INT-GEN
JI Forensic Sci. Int.-Genet.
PD MAY
PY 2016
VL 22
BP 139
EP 148
DI 10.1016/j.fsigen.2016.01.002
PG 10
WC Genetics & Heredity; Medicine, Legal
SC Genetics & Heredity; Legal Medicine
GA DH3WX
UT WOS:000372718600026
PM 26919661
ER
PT J
AU Guina, J
Welton, RS
Broderick, PJ
Correll, TL
Peirson, RP
AF Guina, Jeffrey
Welton, Randon S.
Broderick, Pamela J.
Correll, Terry L.
Peirson, Ryan P.
TI DSM-5 Criteria and Its Implications for Diagnosing PTSD in Military
Service Members and Veterans
SO CURRENT PSYCHIATRY REPORTS
LA English
DT Review
DE PTSD; Stress disorder; DSM-5; Military; Combat; Occupational psychiatry
ID POSTTRAUMATIC-STRESS-DISORDER; FORCE DRONE OPERATORS; COMBAT VETERANS;
CHILDHOOD TRAUMA; WAR VETERANS; HEALTH-CARE; PREVALENCE; SYMPTOMS; IRAQ;
COMPENSATION
AB This review addresses how changes in the Diagnostic and Statistical Manual of Mental Disorders (DSM)-5 posttraumatic stress disorder (PTSD) criteria has the potential to affect the care and careers of those who have served in the military, where the diagnosis often determines fitness for duty and veterans' benefits. PTSD criteria changes were intended to integrate new knowledge acquired since previous DSM editions. Many believe the changes will improve diagnosis and treatment, but some worry these could have negative clinical, occupational, and legal consequences. We analyze the changes in classification, trauma definition, symptoms, symptom clusters, and subtypes and possible impacts on the military (e.g., over-and under-diagnosis, "drone" video exposure, subthreshold PTSD, and secondary PTSD). We also discuss critiques and proposals for future changes. Our objectives are to improve the screening, diagnosis, and treatment of those service members who have survived trauma and to improve policies related to the military mental healthcare and disability systems.
C1 [Guina, Jeffrey; Broderick, Pamela J.] Wright Patterson Med Ctr, Mental Hlth Clin, Dayton, OH 45433 USA.
[Guina, Jeffrey; Welton, Randon S.; Broderick, Pamela J.; Correll, Terry L.; Peirson, Ryan P.] Wright State Univ, Boonshoft Sch Med, Dept Psychiat, 627 S Edwin C Moses Blvd, Dayton, OH 45417 USA.
[Correll, Terry L.; Peirson, Ryan P.] US Air Force, Sch Aerosp Med, Aeromed Consultat Serv, Dayton, OH 45433 USA.
RP Guina, J (reprint author), Wright Patterson Med Ctr, Mental Hlth Clin, Dayton, OH 45433 USA.; Guina, J (reprint author), Wright State Univ, Boonshoft Sch Med, Dept Psychiat, 627 S Edwin C Moses Blvd, Dayton, OH 45417 USA.
EM jeffrey.guina@wright.edu; randon.welton@wright.edu;
pamela.broderick@wright.edu; terry.correll@wright.edu;
ryan.peirson@wright.edu
NR 67
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Z9 4
U1 8
U2 17
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1523-3812
EI 1535-1645
J9 CURR PSYCHIAT REP
JI Curr. Psychiatry Rep.
PD MAY
PY 2016
VL 18
IS 5
AR 43
DI 10.1007/s11920-016-0686-1
PG 9
WC Psychiatry
SC Psychiatry
GA DH1LJ
UT WOS:000372545200007
PM 26971499
ER
PT J
AU Alarcon, GM
Lyons, JB
Christensen, JC
AF Alarcon, Gene M.
Lyons, Joseph B.
Christensen, James C.
TI The effect of propensity to trust and familiarity on perceptions of
trustworthiness over time
SO PERSONALITY AND INDIVIDUAL DIFFERENCES
LA English
DT Article
DE Trust; Trustworthiness; Latent growth modeling; Multiple models
ID MEASUREMENT INVARIANCE; ORGANIZATIONAL TRUST; INTERPERSONAL-TRUST;
PERFORMANCE; PERSPECTIVES; EXPECTATIONS; JUSTICE; IMPACT
AB Research on trust has burgeoned in the last two decades. Despite the growing interest in trust, little is known about the differences in trust between familiar and unfamiliar interactions. The current empirical study explored propensity to trust as predictors of trustworthiness over time in familiar and unfamiliar dyads. Utilizing latent growth modeling we found propensity to trust was related to initial perceptions of trustworthiness in unfamiliar pairs but not in familiar pairs. In addition, familiarity was related to initial perceptions of trustworthiness, but familiarity only influenced the change in integrity. However, there were significant differences in change variances between familiar and unfamiliar pairs. Implications of the findings are also discussed. Published by Elsevier Ltd.
C1 [Alarcon, Gene M.; Lyons, Joseph B.; Christensen, James C.] Air Force Res Lab, 2215 First St,Bldg 33, Wright Patterson AFB, OH 45433 USA.
RP Alarcon, GM (reprint author), Air Force Res Lab, 2215 First St,Bldg 33, Wright Patterson AFB, OH 45433 USA.
EM Gene.alarcon.1@us.af.mil
FU Office of the Director of National Intelligence (ODNI); Intelligence
Advanced Research Projects Activity (IARPA) via Air Force Research
Laboratory
FX The authors would like to acknowledge Justin Estepp, Margaret Bowers,
and Samantha Klosterman for their contributions to the setup, conduct,
and data analysis for this study. The research is based upon work
supported by the Office of the Director of National Intelligence (ODNI),
Intelligence Advanced Research Projects Activity (IARPA), via the Air
Force Research Laboratory. The views and conclusions contained herein
are those of the authors and should not be interpreted as necessarily
representing the official policies or endorsements, either expressed or
implied, of the ODNI, IARPA, or the U.S. Government. The U.S. Government
is authorized to reproduce and distribute reprints for Governmental
purposes notwithstanding any copyright annotation thereon.
NR 33
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U1 17
U2 29
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0191-8869
J9 PERS INDIV DIFFER
JI Pers. Individ. Differ.
PD MAY
PY 2016
VL 94
BP 309
EP 315
DI 10.1016/j.paid.2016.01.031
PG 7
WC Psychology, Social
SC Psychology
GA DG2YN
UT WOS:000371936800050
ER
PT J
AU Poutrina, E
Urbas, A
AF Poutrina, Ekaterina
Urbas, Augustine
TI Multipolar interference for non-reciprocal nonlinear generation
SO SCIENTIFIC REPORTS
LA English
DT Article
ID OPTICAL DIODE; 2ND-HARMONIC GENERATION; 3RD-HARMONIC GENERATION; SILICON
NANOPARTICLES; GOLD NANOPARTICLES; SCATTERING; ENHANCEMENT; RECIPROCITY;
RESONATORS; ARRAYS
AB We show that nonlinear multipolar interference allows achieving not only unidirectional, but also non-reciprocal nonlinear generation from a nanoelement, with the direction of the produced light decoupled from the direction of at least one of the excitation beams. Alternatively, it may allow inhibiting the specified nonlinear response in a nanoelement or in its periodic arrangement by reversing the direction of one of the pumps. These general phenomena exploit the fact that, contrary to the linear response case, nonlinear magneto-electric interference stems from a combination of additive and multiplicative processes and includes an interference between various terms within the electric and magnetic partial waves themselves. We demonstrate the introduced concept numerically using an example of a plasmonic dimer geometry with realistic material parameters.
C1 [Poutrina, Ekaterina; Urbas, Augustine] US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Poutrina, Ekaterina] Universal Energy Syst Inc, 4401 Dayton Xenia Rd, Dayton, OH 45432 USA.
RP Poutrina, E (reprint author), US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.; Poutrina, E (reprint author), Universal Energy Syst Inc, 4401 Dayton Xenia Rd, Dayton, OH 45432 USA.
EM ekaterina.poutrina.ctr.ru@us.af.mil
NR 58
TC 2
Z9 2
U1 4
U2 19
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 2045-2322
J9 SCI REP-UK
JI Sci Rep
PD APR 29
PY 2016
VL 6
AR 25113
DI 10.1038/srep25113
PG 10
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA DK8MF
UT WOS:000375180100001
PM 27126209
ER
PT J
AU Mohan, AT
Gaitonde, DV
Visbal, MR
AF Mohan, Arvind T.
Gaitonde, Datta V.
Visbal, Miguel R.
TI Model reduction and analysis of deep dynamic stall on a plunging airfoil
SO COMPUTERS & FLUIDS
LA English
DT Article
DE Dynamic stall; Dynamic Mode Decomposition; Proper Orthogonal
Decomposition; LES; Model reduction
ID PROPER ORTHOGONAL DECOMPOSITION; SEPARATION CONTROL; FLOW-ANALYSIS; JET;
POD; ACTUATORS; ALGORITHM; WAKE
AB The ability to generate massive amounts of high-resolution data, both experimentally and computationally, has led to a surge of interest in mathematical model reduction using modal decomposition algorithms. When applied to complex unsteady flows, different techniques highlight different flow dynamics which are difficult to extract directly from large datasets. A widely used technique is Proper Orthogonal Decomposition (POD) which ranks modes by their relative energy content. A newer method, Dynamic Mode Decomposition (DMD), focuses on rates of growth of different modes, thus retaining temporal information pertinent to dynamic events which dominate highly transient flows. In this paper, we employ these techniques, with emphasis on DMD, to analyze flow past an SD7003 airfoil undergoing periodic plunging motion representative of small unmanned vehicles. Snapshots are obtained from a high-fidelity, experimentally validated Large-Eddy Simulation (LES). The stability characteristics of DMD modes show that the flow structure associated with the leading edge vortex (LEV) in dynamic stall is unstable. The influence of DMD modes in local regions of the flow provide insight into which flow frequencies may be targeted by leading edge actuators to have maximum impact in controlling the unstable flow structures inducing stall. Dominant POD modes, each of which can have multiple frequency components, are shown to be comprised primarily of the dominant DMD mode contributions. A practical framework is introduced to identify components of a global flow structure across different velocity components. The method is shown to successfully reproduce the global flow structure. A few dominant DMD modes are used to reconstruct the flow near the leading edge, where rapid changes occur during parts of the plunging cycle and the ability of individual probe to provide insight into global phenomena is assessed. Finally, a stability analysis of each mode is performed to identify flow instabilities near the leading edge. (C) 2016 Elsevier Ltd. All rights reserved.
C1 [Mohan, Arvind T.; Gaitonde, Datta V.] Ohio State Univ, Mech & Aerosp Engn, Columbus, OH 43210 USA.
[Visbal, Miguel R.] US Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Mohan, AT (reprint author), Ohio State Univ, Mech & Aerosp Engn, Columbus, OH 43210 USA.
EM mohan.69@osu.edu
FU AFRL Collaborative Center for Aeronautical Sciences; AFOSR
FX This work was supported by the AFRL Collaborative Center for
Aeronautical Sciences. The LES of the plunging wing was per formed by MV
under the sponsorship of AFOSR (Monitor: Dr. Douglas Smith). The
simulations were carried out using resources provided by the Department
of Defense High Performance Computing Modernization Program and Ohio
Supercomputer Center. Several figures were made using Fieldview software
with licenses obtained from the Intelligent Light University Partnership
Program.
NR 36
TC 0
Z9 0
U1 8
U2 14
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0045-7930
EI 1879-0747
J9 COMPUT FLUIDS
JI Comput. Fluids
PD APR 28
PY 2016
VL 129
BP 1
EP 19
DI 10.1016/j.compfluid.2016.01.017
PG 19
WC Computer Science, Interdisciplinary Applications; Mechanics
SC Computer Science; Mechanics
GA DK0OW
UT WOS:000374613100001
ER
PT J
AU Tiley, JS
Mahaffey, DW
Alam, T
Rojhirunsakool, T
Senkov, O
Parthasarthy, T
Banerjee, R
AF Tiley, J. S.
Mahaffey, D. W.
Alam, T.
Rojhirunsakool, T.
Senkov, O.
Parthasarthy, T.
Banerjee, R.
TI Strengthening mechanisms in an inertia friction welded nickel-base
superalloy
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Article
DE Inertia friction welding; Precipitation; Nickel based superalloys;
Hardness measurement; Strength modeling; Atom probe tomography
ID NI-BASED SUPERALLOYS; PART II; IN718
AB This research investigated the strengthening mechanisms associated with the as-welded microstructure developed during inertia friction welding of dissimilar superalloys LHSR and Mar-M247. The weld interface and heat affected regions of the sample were analyzed using hardness indentation techniques and subsequently characterized using SEM, TEM and advanced atom probe tomography. The yield strength of the welded joint was modeled to determine the impact of the gradients in the as-welded microstructure on strengthening mechanisms within the LSHR material. Characterization centered on formation of gamma', gamma grain size and chemical segregation within the heat affected regions. Results indicate an increased hardness in the vicinity of the weld interface, resulting from the refined dispersion of gamma' and gamma grains. Published by Elsevier B.V.
C1 [Tiley, J. S.; Mahaffey, D. W.; Senkov, O.; Parthasarthy, T.] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Alam, T.; Rojhirunsakool, T.; Banerjee, R.] Univ N Texas, Dept Mat Engn, Denton, TX 76203 USA.
[Senkov, O.; Parthasarthy, T.] UES Inc, Dayton, OH 45433 USA.
RP Tiley, JS (reprint author), Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
EM Jaimie.Tiley@us.af.mil
OI Senkov, Oleg/0000-0001-5587-415X
FU Metals Processing program at the Air Force Research Laboratory;
Institute for Science and Engineering Simulation (ISES) at the
University of North Texas (AFRL) [FA8650-08-C-5226]; AF
[FA8650-15-D-5230]
FX This project was supported by the Metals Processing program at the Air
Force Research Laboratory, and the Institute for Science and Engineering
Simulation (ISES) at the University of North Texas (AFRL Contract number
FA8650-08-C-5226). Work by ONS and TP was supported through the AF
on-site contract number FA8650-15-D-5230 conducted by UES, Inc., Dayton,
OH. Additional characterization support was provided by the Center for
Advanced Research and Technology (CART) at the University of North
Texas, and by the Center for Accelerated Maturation of Materials (CAMM)
at the Ohio State University. The authors are also grateful for guidance
and technical support provided by Tim Gabb at the NASA Glenn Research
Laboratory.
NR 31
TC 3
Z9 3
U1 8
U2 20
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0921-5093
EI 1873-4936
J9 MAT SCI ENG A-STRUCT
JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process.
PD APR 26
PY 2016
VL 662
BP 26
EP 35
DI 10.1016/j.msea.2016.03.030
PG 10
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA DK8GD
UT WOS:000375164300004
ER
PT J
AU Jiao, CQ
Adams, SF
AF Jiao, C. Q.
Adams, S. F.
TI Ion chemistries in triethylborane
SO INTERNATIONAL JOURNAL OF MASS SPECTROMETRY
LA English
DT Article
DE Triethylborane (TEB); Electron ionization; Ion-molecule reactions
ID ELECTRON-IMPACT IONIZATION; CROSS-SECTIONS
AB The absolute total and partial cross sections of electron ionization on triethylborane (TEB) are measured in an electron energy range of 6.6-200 eV. The total cross section reaches a maximum of 2.2 x 10(-15) cm(2) in 65-85 eV energy region. Product ions from the electron ionization include C2H2-5+, BCH4+, EC2H2,4,6+, BC3H4,6+, BC4H8,10+ and BC6H15+, among which BC6H15+,BC4H10+ and BC2F16+ are the most abundant ions. Gas-phase reactions between TEB and certain major ions from the electron ionization of TEB are studied. Common products from the ion-molecule reactions are BC4H10+ and BC2H6+, as well as association products for certain heavy-ion reactions. The mechanisms of forming BC4H10+ and BC2H6+ in ion-molecule reactions are believed to be simple ethide transfer and ethide transfer followed by dissociation (loss of C2H4), respectively. (C) 2016 Elsevier B.V. All rights reserved.
C1 [Jiao, C. Q.] Universal Energy Syst Inc, Dayton, OH 45432 USA.
[Adams, S. F.] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Adams, SF (reprint author), US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
EM steven.adams.11@us.af.mil
FU Air Force Office of Scientific Research; Aerospace Systems Directorate
AFRL
FX The authors thank Dr. Alan Garscadden for his advice on studying TEB,
the Aerospace Systems Directorate AFRL, and the Air Force Office of
Scientific Research for their support.
NR 22
TC 0
Z9 0
U1 1
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1387-3806
EI 1873-2798
J9 INT J MASS SPECTROM
JI Int. J. Mass Spectrom.
PD APR 25
PY 2016
VL 401
BP 11
EP 16
DI 10.1016/j.ijms.2016.02.011
PG 6
WC Physics, Atomic, Molecular & Chemical; Spectroscopy
SC Physics; Spectroscopy
GA DL6HF
UT WOS:000375739600002
ER
PT J
AU Glavin, NR
Muratore, C
Jespersen, ML
Hu, JJ
Hagerty, PT
Hilton, A
Blake, AT
Grabowski, CA
Durstock, MF
McConney, ME
Hilgefort, DM
Fisher, TS
Voevodin, AA
AF Glavin, Nicholas R.
Muratore, Christopher
Jespersen, Michael L.
Hu, Jianjun
Hagerty, Phillip T.
Hilton, Al M.
Blake, Austin T.
Grabowski, Christopher A.
Durstock, Michael F.
McConney, Michael E.
Hilgefort, Drew M.
Fisher, Timothy S.
Voevodin, Andrey A.
TI Amorphous Boron Nitride: A Universal, Ultrathin Dielectric For 2D
Nanoelectronics
SO ADVANCED FUNCTIONAL MATERIALS
LA English
DT Article
ID CHEMICAL-VAPOR-DEPOSITION; PULSED-LASER DEPOSITION; H-BN; THIN-FILM;
FEW-LAYER; MONOLAYER; DEVICES; FOIL
AB Next-generation nanoelectronics based on 2D materials ideally will require reliable, flexible, transparent, and versatile dielectrics for transistor gate barriers, environmental passivation layers, capacitor spacers, and other device elements. Ultrathin amorphous boron nitride of thicknesses from 2 to 17 nm, described in this work, may offer these attributes, as the material is demonstrated to be universal in structure and stoichiometric chemistry on numerous substrates including flexible polydimethylsiloxane, amorphous silicon dioxide, crystalline Al2O3, other 2D materials including graphene, 2D MoS2, and conducting metals and metal foils. The versatile, large area pulsed laser deposition growth technique is performed at temperatures less than 200 degrees C and without modifying processing conditions, allowing for seamless integration into 2D device architectures. A device-scale dielectric constant of 5.9 +/- 0.65 at 1 kHz, breakdown voltage of 9.8 +/- 1.0 MV cm(-1), and bandgap of 4.5 eV were measured for various thicknesses of the ultrathin a-BN material, representing values higher than previously reported chemical vapor deposited h-BN and nearing single crystal h-BN.
C1 [Glavin, Nicholas R.; Jespersen, Michael L.; Hu, Jianjun; Hagerty, Phillip T.; Hilton, Al M.; Blake, Austin T.; Grabowski, Christopher A.; Durstock, Michael F.; McConney, Michael E.; Hilgefort, Drew M.] US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Glavin, Nicholas R.; Fisher, Timothy S.] Purdue Univ, Sch Mech Engn, W Lafayette, IN 47907 USA.
[Glavin, Nicholas R.; Fisher, Timothy S.] Purdue Univ, Birck Nanotechnol Ctr, W Lafayette, IN 47907 USA.
[Muratore, Christopher] Univ Dayton, Dayton, OH 45409 USA.
[Jespersen, Michael L.; Hu, Jianjun; Hagerty, Phillip T.; Hilgefort, Drew M.] Univ Dayton, Res Lab, Dayton, OH 45409 USA.
[Hilton, Al M.] Wyle Labs, Dayton, OH 43433 USA.
[Grabowski, Christopher A.] UES Inc, Dayton, OH 45432 USA.
[Voevodin, Andrey A.] Univ N Texas, Mat Sci & Engn, Denton, TX 76203 USA.
RP Glavin, NR (reprint author), US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.; Glavin, NR (reprint author), Purdue Univ, Sch Mech Engn, W Lafayette, IN 47907 USA.; Glavin, NR (reprint author), Purdue Univ, Birck Nanotechnol Ctr, W Lafayette, IN 47907 USA.
EM Nicholas.Glavin.1@us.af.mil
RI Fisher, Timothy/D-8517-2011
OI Fisher, Timothy/0000-0002-8909-313X
FU Air Force Office of Scientific Research Aerospace Materials for Extreme
Environments [14RX13COR]; Air Force Office of Scientific Research
Complex Materials and Devices program [15RXCOR184]; US National Science
Foundation [1344654]
FX The authors thank the support of Arthur Safriet, Travis Shelton, and
John Bultman of University of Dayton Research Institute, as well as
Rachel Naguy from SOCHE Laboratories. Assistance from Zach Bunning at
the Air Force Research Laboratory with help in illustration generation
is greatly appreciated. Financial support from the Air Force Office of
Scientific Research Aerospace Materials for Extreme Environments
(14RX13COR) and Complex Materials and Devices programs (15RXCOR184) is
gratefully acknowledged. T.S.F. thanks the US National Science
Foundation for support through its Scalable Nanomanufacturing Program
(Grant: 1344654).
NR 48
TC 1
Z9 1
U1 39
U2 77
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA POSTFACH 101161, 69451 WEINHEIM, GERMANY
SN 1616-301X
EI 1616-3028
J9 ADV FUNCT MATER
JI Adv. Funct. Mater.
PD APR 25
PY 2016
VL 26
IS 16
BP 2640
EP 2647
DI 10.1002/adfm.201505455
PG 8
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA DK7SF
UT WOS:000375125300005
ER
PT J
AU Pustovit, VN
Urbas, AM
Chipouline, AV
Shahbazyan, TV
AF Pustovit, Vitaliy N.
Urbas, Augustine M.
Chipouline, Arkadi V.
Shahbazyan, Tigran V.
TI Coulomb and quenching effects in small nanoparticle-based spasers
SO PHYSICAL REVIEW B
LA English
DT Article
ID SINGLE-MOLECULE FLUORESCENCE; METAL-ENHANCED FLUORESCENCE; PLASMONIC
NANOCAVITY ARRAYS; QUANTUM DOTS; GOLD NANOPARTICLES; EMISSION;
NANOSTRUCTURES; SUPERRADIANCE; FLUOROPHORES; LUMINESCENCE
AB We study numerically the effect of mode mixing and direct dipole-dipole interactions between gain molecules on spasing in small composite nanoparticles with a metallic core and a dye-doped dielectric shell. By combining Maxwell-Bloch equations with Green's function formalism, we calculate lasing frequency and threshold population inversion for various gain densities in the shell. We find that gain coupling to nonresonant plasmon modes has a negligible effect on spasing threshold. In contrast, the direct dipole-dipole coupling, by causing random shifts of gain molecules' excitation frequencies, hinders reaching the spasing threshold in small systems. We identify a region of parameter space in which spasing can occur considering these effects.
C1 [Pustovit, Vitaliy N.; Urbas, Augustine M.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Chipouline, Arkadi V.] Tech Univ Darmstadt, Inst Microelectrotech & Photon, Merckstr 25, D-64283 Darmstadt, Germany.
[Shahbazyan, Tigran V.] Jackson State Univ, Dept Phys, Jackson, MS 39217 USA.
RP Pustovit, VN (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
FU AFRL Materials and Manufacturing Directorate Applied Metamaterials
Program; NSF [DMR-1206975, HRD-1547754]
FX This research was performed while the first author held a NRC Research
Associateship Programs (USA) Award at the Air Force Research Laboratory.
This work was also supported by the AFRL Materials and Manufacturing
Directorate Applied Metamaterials Program. Work at JSU was supported in
part by NSF Grants No. DMR-1206975 and No. HRD-1547754.
NR 63
TC 2
Z9 2
U1 8
U2 17
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9950
EI 2469-9969
J9 PHYS REV B
JI Phys. Rev. B
PD APR 25
PY 2016
VL 93
IS 16
AR 165432
DI 10.1103/PhysRevB.93.165432
PG 7
WC Physics, Condensed Matter
SC Physics
GA DK5HF
UT WOS:000374950300014
ER
PT J
AU Parthasarathy, TA
Porter, WJ
Buchanan, DJ
John, R
AF Parthasarathy, T. A.
Porter, W. J.
Buchanan, D. J.
John, R.
TI Development of a microstructure-sensitive design tool for high
temperature strain rate sensitive flow stress of IN100 Ni-base
superalloy
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Article
DE Design tool; High temperature; Strain-rate sensitive; Flow stress; IN100
ID ORDERING KINETICS; ALLOYS; NI3AL; INTERMETALLICS; BOUNDARIES;
SIMULATION; ENERGY
AB A physics based microstructure-sensitive design tool that predicts the flow stress of an IN100 superalloy as a function of temperature and strain rate was developed. The model calibration/validation included new experimental data of strain-rate sensitive high temperature flow stress data obtained on an IN100 alloy with a novel microstructure of coarse-grains that include grain boundary primary precipitates of Ni3Al(gamma'), intragranular coarse secondary gamma' and a high volume fraction of coarse tertiary gamma'. The model was realized by extending prior work on an athermal yield model developed using discrete dislocation dynamics simulations along with prior literature data on standard microstructures of IN100. The thermally activated component of the yield model was obtained by including an yield stress dependent creep model formulated originally by Wilshire and Scharning (2009) [1], and by invoking a temperature dependent Anti-Phase Boundary (APB) energy based on a formalism that captures high temperature order parameter of Ni3Al. The resultant model was found to capture experimental data on flow stress from current work in addition to reported data on IN100, including the standard subsolvus and supersolvus heat treat conditions. (C) 2016 Elsevier B.V. All rights reserved.
C1 [Parthasarathy, T. A.] Universal Energy Syst Inc, 4401 Dayton Xenia Rd, Dayton, OH 45432 USA.
[Porter, W. J.; Buchanan, D. J.] Univ Dayton, Res Inst, 300 Coll Pk, Dayton, OH 45469 USA.
[John, R.] Air Force Res Lab, AFRL RXCM, Wright Patterson AFB, OH 45433 USA.
RP Parthasarathy, TA (reprint author), Universal Energy Syst Inc, 4401 Dayton Xenia Rd, Dayton, OH 45432 USA.
EM triplicane.parthasarathy.ctr@us.af.mil
FU Air Force contract [FA8650-10-D-5226]
FX It is a pleasure to acknowledge several useful discussions with Dr. Jay
Tiley, Dr.Christopher Woodward and Dr.Rollie Dutton, all from Materials
and Manufacturing directorate of the Air Force Research Laboratory.
Microstructural information provided by M.E. Burba (AFRL) is gratefully
acknowledged. This work was supported in part through Air Force contract
# FA8650-10-D-5226.
NR 26
TC 1
Z9 1
U1 2
U2 6
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0921-5093
EI 1873-4936
J9 MAT SCI ENG A-STRUCT
JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process.
PD APR 20
PY 2016
VL 661
BP 247
EP 253
DI 10.1016/j.msea.2016.02.074
PG 7
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA DK0SH
UT WOS:000374622000029
ER
PT J
AU Kobayashi, K
Bak, MS
Tanaka, H
Carter, C
Do, H
AF Kobayashi, Kazunobu
Bak, Moon Soo
Tanaka, Hiroki
Carter, Campbell
Do, Hyungrok
TI Laser-induced breakdown emission in hydrocarbon fuel mixtures
SO JOURNAL OF PHYSICS D-APPLIED PHYSICS
LA English
DT Article
DE laser-induced breakdown; hydrocarbon fuel; time-resolved emission
measurement; plasma temperature; electron number density
ID ELEMENTAL ANALYSIS; INDUCED PLASMA; SPECTROSCOPY; AIR; WATER; CHLORINE;
FLUORINE; DENSITY; SAMPLES
AB Time-resolved emission measurements of laser-induced breakdown plasmas have been carried out to investigate the effect that gas species might have on the kinetics, particularly in excited states, and the resulting plasma properties. For this purpose, fuel-oxygen (O-2)-carbon dioxide (CO2) mixtures with either helium (He) or nitrogen (N-2) balance are prepared while maintaining their atomic compositions. The fuels tested in this study are methane (CH4), ethylene (C2H4), propane (C3H8), and butane (C4H10). The breakdown is produced in the mixtures (CH4/CO2/O-2/He, C2H4/O-2/He, C3H8/CO2/O-2/He and C4H10/CO2/O-2/He or CH4/CO2/O-2/N-2, C2H4/O-2/N-2, C3H8/CO2/O-2/N-2 and C4H10/CO2/O-2/N-2) at room conditions using the second harmonic of a Q-switched Nd:YAG laser (with pulse duration of 10 ns). The temporal evolution of plasma temperature is deduced from the ratio of two oxygen lines (777 nm and 823 nm) through Boltzmann analysis, while the evolution of electron number density is estimated based on Stark broadening of the Balmer-alpha (H-alpha) line at 656 nm and the measured plasma temperature. From the results, the temporal evolution of emission spectra and decay rates of atomic line-intensities are found to be almost identical between the breakdown plasma in the different mixtures given balancing gases. Furthermore, the temporal evolution of plasma temperature and electron number density are also found to be independent of the species compositions. Therefore, this behavior-of the breakdown emissions and plasma properties in the different mixtures with identical atomic composition-may be because the breakdown gases reach similar thermodynamic and physiochemical states immediately after the breakdown.
C1 [Kobayashi, Kazunobu; Tanaka, Hiroki] Osaka Gas Co Ltd, Energy Technol Labs, Konohana Ku, Osaka, Japan.
[Bak, Moon Soo] Sungkyunkwan Univ, Sch Mech Engn, Suwon, Gyeonggi Do, South Korea.
[Kobayashi, Kazunobu; Do, Hyungrok] Univ Notre Dame, Dept Aerosp & Mech Engn, Notre Dame, IN 46556 USA.
[Carter, Campbell] US Air Force, Res Lab, Dayton, OH USA.
[Do, Hyungrok] Seoul Natl Univ, Dept Mech & Aerosp Engn, Seoul 151, South Korea.
RP Bak, MS (reprint author), Sungkyunkwan Univ, Sch Mech Engn, Suwon, Gyeonggi Do, South Korea.
EM moonsoo@skku.edu
NR 25
TC 0
Z9 0
U1 9
U2 19
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0022-3727
EI 1361-6463
J9 J PHYS D APPL PHYS
JI J. Phys. D-Appl. Phys.
PD APR 20
PY 2016
VL 49
IS 15
AR 155201
DI 10.1088/0022-3727/49/15/155201
PG 7
WC Physics, Applied
SC Physics
GA DI6PA
UT WOS:000373620600010
ER
PT J
AU Carles, S
Saidani, G
Le Garrec, JL
Guen, N
Mitchell, JBA
Viggiano, AA
Shuman, NS
AF Carles, Sophie
Saidani, Ghassen
Le Garrec, Jean-Luc
Guen, Ngary
Mitchell, James B. A.
Viggiano, Albert A.
Shuman, Nicholas S.
TI Demonstration of the branching ratio inversion for the electron
attachment to phosphoryl chloride POCl3 in the gas phase between 300 and
200 K
SO CHEMICAL PHYSICS LETTERS
LA English
DT Article
ID TEMPERATURE; SF6
AB Electron attachment to phosphoryl chloride (phosphorus oxychloride) POCl3 has been studied in the gas phase by mass spectrometry at several low temperatures (47.7, 74.5, 169.7 and 199.5K) with the CRESU method. By measuring over this temperature range and data from [8], we have demonstrated the inversion of the branching ratio between the exothermic non -dissociative exit channel POCl3- and the thermo-neutral dissociative exit channel POCl2- + Cl. A kinetic model in terms of statistical theory is used to fit the experimental data. (C) 2016 Elsevier B.V. All rights reserved.
C1 [Carles, Sophie; Saidani, Ghassen; Le Garrec, Jean-Luc; Guen, Ngary; Mitchell, James B. A.] Univ Rennes 1, UMR CNRS 6251, Inst Phys Rennes, Dept Phys Mol,Astrophys Lab, Campus Beaulieu, F-35042 Rennes, France.
[Viggiano, Albert A.] Air Force Res Lab, Space Vehicles Directorate, Albuquerque, NM 87117 USA.
RP Carles, S (reprint author), Univ Rennes 1, UMR CNRS 6251, Inst Phys Rennes, Dept Phys Mol,Astrophys Lab, Campus Beaulieu, F-35042 Rennes, France.
EM sophie.carles@univ-rennes1.fr
NR 18
TC 0
Z9 0
U1 2
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0009-2614
EI 1873-4448
J9 CHEM PHYS LETT
JI Chem. Phys. Lett.
PD APR 16
PY 2016
VL 650
BP 144
EP 147
DI 10.1016/j.cplett.2016.02.062
PG 4
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA DK5NP
UT WOS:000374966900028
ER
PT J
AU Ard, SG
Compton, RN
Garrett, WR
AF Ard, S. G.
Compton, R. N.
Garrett, W. R.
TI Rotational auto-detachment of dipole-bound anions
SO CHEMICAL PHYSICS LETTERS
LA English
DT Article
ID RADIATION-INDUCED PHOTODETACHMENT; CRITICAL BINDING; ELECTRIC-DIPOLE;
CHARGED PARTICLE; MOLECULAR ANIONS; POLAR-MOLECULES; FINITE DIPOLE;
STATES; FIELD; HYDROGEN
AB Rotational auto-detachment of acetonitrile, trimethyl-acetonitrile, acetone, and cyclobutanone dipole bound anions was studied under varying conditions in a Rydberg electron transfer (RET) time-of-flight apparatus. Varying amounts of auto-detachment was observed for anions with similar electron affinity and dipole moment, but different moments of inertia. These results were found to be consistent with predictions based on the calculated rotational spectra for these anions, highlighting the importance of critical binding properties in understanding the stability and lifetime of dipole bound systems. (C) 2016 Elsevier B.V. All rights reserved.
C1 [Ard, S. G.; Compton, R. N.; Garrett, W. R.] Univ Tennessee, Dept Phys, Knoxville, TN 37996 USA.
[Ard, S. G.] Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
[Compton, R. N.] Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA.
RP Ard, SG (reprint author), Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
EM ards@bc.edu
FU NSF
FX We are grateful for the support of NSF during the course of this work.
NR 27
TC 0
Z9 0
U1 3
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0009-2614
EI 1873-4448
J9 CHEM PHYS LETT
JI Chem. Phys. Lett.
PD APR 16
PY 2016
VL 650
BP 154
EP 158
DI 10.1016/j.cplett.2016.03.011
PG 5
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA DK5NP
UT WOS:000374966900030
ER
PT J
AU Robinson, JA
Varanasi, C
Voevodin, AA
Li, LJ
Robinson, JT
Lou, J
AF Robinson, Joshua A.
Varanasi, Chakrapani
Voevodin, Andrey A.
Li, Lain-Jong
Robinson, Jeremy T.
Lou, Jun
TI TWO-DIMENSIONAL HETEROSTRUCTURE MATERIALS
SO JOURNAL OF MATERIALS RESEARCH
LA English
DT Editorial Material
C1 [Robinson, Joshua A.] Penn State Univ, University Pk, PA 16802 USA.
[Varanasi, Chakrapani] US Army, Res Off, Washington, DC USA.
[Voevodin, Andrey A.] US Air Force, Res Lab, Wright Patterson AFB, OH USA.
[Li, Lain-Jong] King Abdullah Univ Sci & Technol, Thuwal, Saudi Arabia.
[Robinson, Jeremy T.] Naval Res Lab, Washington, DC 20375 USA.
[Lou, Jun] Rice Univ, Houston, TX 77251 USA.
RP Robinson, JA (reprint author), Penn State Univ, University Pk, PA 16802 USA.
RI Li, Lain-Jong/D-5244-2011
OI Li, Lain-Jong/0000-0002-4059-7783
NR 0
TC 0
Z9 0
U1 5
U2 17
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 0884-2914
EI 2044-5326
J9 J MATER RES
JI J. Mater. Res.
PD APR 14
PY 2016
VL 31
IS 7
BP 823
EP 823
DI 10.1557/jmr.2016.108
PG 1
WC Materials Science, Multidisciplinary
SC Materials Science
GA DM2LN
UT WOS:000376178400001
ER
PT J
AU McConney, ME
Glavin, NR
Juhl, AT
Check, MH
Durstock, MF
Voevodin, AA
Shelton, TE
Bultman, JE
Hu, JJ
Jespersen, ML
Gupta, MK
Naguy, RD
Colborn, JG
Haque, A
Hagerty, PT
Stevenson, RE
Muratore, C
AF McConney, Michael E.
Glavin, Nicholas R.
Juhl, Abigail T.
Check, Michael H.
Durstock, Michael F.
Voevodin, Andrey A.
Shelton, Travis E.
Bultman, John E.
Hu, Jianjun
Jespersen, Michael L.
Gupta, Maneesh K.
Naguy, Rachel D.
Colborn, Jennifer G.
Haque, Aman
Hagerty, Phillip T.
Stevenson, Randall E.
Muratore, Christopher
TI Direct synthesis of ultra-thin large area transition metal
dichalcogenides and their heterostructures on stretchable polymer
surfaces
SO JOURNAL OF MATERIALS RESEARCH
LA English
DT Article
ID CHEMICAL-VAPOR-DEPOSITION; MOS2 ATOMIC LAYERS; FILMS; EXFOLIATION;
ELECTRONICS; TRANSISTORS; MONOLAYER; SUBSTRATE; GROWTH
AB A scalable approach for synthesis of ultra-thin (<10 nm) transition metal dichalcogenides (TMD) films on stretchable polymeric materials is presented. Specifically, magnetron sputtering from pure TMD targets, such as MoS2 and WS2, was used for growth of amorphous precursor films at room temperature on polydimethylsiloxane substrates. Stacks of different TMD films were grown upon each other and integrated with optically transparent insulating layers such as boron nitride. These precursor films were subsequently laser annealed to form high quality, few-layer crystalline TMDs. This combination of sputtering and laser annealing is commercially scalable and lends itself well to patterning. Analysis by Raman spectroscopy, scanning probe, optical, and transmission electron microscopy, and x-ray photoelectron spectroscopy confirm our assertions and illustrate annealing mechanisms. Electrical properties of simple devices built on flexible substrates are correlated to annealing processes. This new approach is a significant step toward commercial-scale stretchable 2D heterostructured nanoelectronic devices.
C1 [McConney, Michael E.; Glavin, Nicholas R.; Juhl, Abigail T.; Check, Michael H.; Durstock, Michael F.; Voevodin, Andrey A.; Shelton, Travis E.; Bultman, John E.; Hu, Jianjun; Jespersen, Michael L.; Gupta, Maneesh K.; Naguy, Rachel D.; Colborn, Jennifer G.; Hagerty, Phillip T.; Stevenson, Randall E.; Muratore, Christopher] Mat & Mfg Directorate, Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Bultman, John E.; Hu, Jianjun; Jespersen, Michael L.; Gupta, Maneesh K.; Naguy, Rachel D.] Univ Dayton, Res Inst, Dayton, OH 45469 USA.
[Colborn, Jennifer G.] Univ Dayton, Dept Mech Engn, Dayton, OH 45469 USA.
[Haque, Aman] Penn State Univ, Mech & Nucl Engn, University Pk, PA 16801 USA.
[Hagerty, Phillip T.; Stevenson, Randall E.; Muratore, Christopher] Univ Dayton, Dept Chem & Mat Engn, Dayton, OH 45469 USA.
[Voevodin, Andrey A.] Univ N Texas, Dept Mat Sci & Engn, Denton, TX 76203 USA.
RP Muratore, C (reprint author), Mat & Mfg Directorate, Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.; Muratore, C (reprint author), Univ Dayton, Dept Chem & Mat Engn, Dayton, OH 45469 USA.
EM cmuratore1@udayton.edu
FU Air Force Office of Scientific Research, Complex Materials and Devices
program [15RXCOR184]; Air Force Research Laboratory funded DAGSI
program; AFRL Materials and Manufacturing Directorate Laboratory
Director's Funds
FX Financial support from Air Force Office of Scientific Research, Complex
Materials and Devices program (15RXCOR184) is gratefully acknowledged.
CM gratefully acknowledges support from Air Force Research Laboratory
funded DAGSI program and AFRL Materials and Manufacturing Directorate
Laboratory Director's Funds to sponsor this work. CM would also like to
acknowledge Advanced Energy Industries Incorporated for use of a
Pinnacle Plus pulsed power supply for thin film growth. All authors
thank Art Safriet for his assistance in development and fabrication of
equipment used in this work.
NR 32
TC 2
Z9 2
U1 22
U2 37
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 0884-2914
EI 2044-5326
J9 J MATER RES
JI J. Mater. Res.
PD APR 14
PY 2016
VL 31
IS 7
BP 967
EP 974
DI 10.1557/jmr.2016.36
PG 8
WC Materials Science, Multidisciplinary
SC Materials Science
GA DM2LN
UT WOS:000376178400015
ER
PT J
AU Ruggles-Wrenn, MB
Lanser, RL
AF Ruggles-Wrenn, M. B.
Lanser, R. L.
TI Tension-compression fatigue of an oxide/oxide ceramic composite at
elevated temperature
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Article
DE Ceramic-matrix composites (CMCs); Oxides; Fatigue; High-temperature
properties; Mechanical properties; Fractography
ID 1200 DEGREES-C; +/-45-DEGREES FIBER ORIENTATION; WOVEN C/SIC COMPOSITE;
MATRIX COMPOSITES; CREEP-BEHAVIOR; MECHANICAL-BEHAVIOR; STEAM
ENVIRONMENT; REINFORCED COMPOSITES; AIR; 1200-DEGREES-C
AB Tension-compression fatigue behavior of an oxide-oxide ceramic-matrix composite was investigated at 1200 degrees C in air and in steam. The composite is comprised of an alumina matrix reinforced with Nextel (TM) 720 alumina-mullite fibers woven in an eight harness satin weave (8HSW). The composite has no interface between the fiber and matrix, and relies on the porous matrix for flaw tolerance. Tension compression fatigue behavior was studied for fatigue stresses ranging from 60 to 120 MPa at a frequency of 1.0 Hz. The R ratio (minimum stress to maximum stress) was -1.0. Fatigue run-out was defined as 105 cycles and was achieved at 80 MPa in air and at 70 MPa in steam. Steam reduced fatigue lives by an order of magnitude. Specimens that achieved fatigue run-out were subjected to tensile tests to failure to characterize the retained tensile properties. Specimens subjected to prior fatigue in air retained 100% of their tensile strength. The steam environment severely degraded tensile properties. Tension-compression fatigue was considerably more damaging than tension-tension fatigue. Composite microstructure, as well as damage and failure mechanisms were investigated. Published by Elsevier B.V.
C1 [Ruggles-Wrenn, M. B.; Lanser, R. L.] US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Ruggles-Wrenn, MB (reprint author), US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
EM marina.ruggles-wrenn@afit.edu
RI Ruggles-Wrenn, Marina/J-6103-2014
NR 43
TC 2
Z9 2
U1 11
U2 22
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0921-5093
EI 1873-4936
J9 MAT SCI ENG A-STRUCT
JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process.
PD APR 6
PY 2016
VL 659
BP 270
EP 277
DI 10.1016/j.msea.2016.02.057
PG 8
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA DI5KU
UT WOS:000373538600028
ER
PT J
AU Horan, V
Stevens, B
AF Horan, Victoria
Stevens, Brett
TI Locating patterns in the de Bruijn torus
SO DISCRETE MATHEMATICS
LA English
DT Article
DE de Bruijn torus; Universal cycles; Pseudorandom arrays
ID UNIVERSAL CYCLES; ARRAYS
AB The de Bruijn torus (or grid) problem looks to find an n-by-m binary matrix in which every possible j-by-k submatrix appears exactly once. The existence and construction of these binary matrices were determined in the 70s, with generalizations to d-ary matrices in the 80s and 90s. However, these constructions lacked efficient decoding methods, leading to new constructions in the early 2000s. The new constructions develop cross-shaped patterns (rather than rectangular), and rely on a concept known as a half de Bruijn sequence. In this paper, we further advance this construction beyond cross-shape patterns. Furthermore, we show results for universal cycle grids, based off of the one-dimensional universal cycles introduced by Chung, Diaconis, and Graham, in the 90s. These grids have many applications such as robotic vision, location detection, and projective touch-screen displays. Published by Elsevier B.V.
C1 [Horan, Victoria] US Air Force, Res Lab, Informat Directorate, Washington, DC 20330 USA.
[Stevens, Brett] Carleton Univ, Sch Math & Stat, Ottawa, ON K1S 5B6, Canada.
RP Horan, V (reprint author), US Air Force, Res Lab, Informat Directorate, Washington, DC 20330 USA.
EM victoria.horan.1@us.af.mil; brett@math.carleton.ca
NR 15
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0012-365X
EI 1872-681X
J9 DISCRETE MATH
JI Discret. Math.
PD APR 6
PY 2016
VL 339
IS 4
BP 1274
EP 1282
DI 10.1016/j.disc.2015.11.015
PG 9
WC Mathematics
SC Mathematics
GA DC8KE
UT WOS:000369467500010
ER
PT J
AU Yusa, N
Knopp, JS
AF Yusa, Noritaka
Knopp, Jeremy S.
TI Evaluation of probability of detection (POD) studies with multiple
explanatory variables
SO JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY
LA English
DT Article
DE cracking; numerical simulation; inspection; non-destructive testing and
evaluation; evaluation; eddy current testing; probability of detection;
finite element method; flaw; safety assessment
ID DETECTION CURVES; INSPECTION
AB This study proposes a new method to evaluate a probability of detection (POD) as a function of more than one flaw parameter. The main idea of the method is to assume that signals due to flaws described with a given parameter
[GRAPHICS]
have a normal distribution of a mean of
[GRAPHICS]
and a standard deviation of
[GRAPHICS]
, and to use a combination of signals calculated by numerical simulations and experimental data to evaluate
[GRAPHICS]
and
[GRAPHICS]
, respectively. The method does not postulate a closed-form of
[GRAPHICS]
found in conventional approaches, and it evaluates a few parameters that characterize the distribution using maximum likelihood analysis to calculate POD. This allows POD evaluation for data that does not satisfy linearity or constant variance assumptions without transformation. The proposed method is demonstrated through analyzing simulated eddy current signals due to flaws appearing in type 316L stainless steel welds. The results of the demonstration confirm that the proposed method can provide the POD with its confidence bounds as a function of the depth and the length of a flaw. The results also showed that the proposed method does not require a large amount of experimental data compared to conventional a vs. a analysis.
C1 [Yusa, Noritaka] Tohoku Univ, Grad Sch Engn, Dept Quantum Sci & Energy Engn, Aoba Ku, 6-6-01-2 Aramaki Aza Aoba, Sendai, Miyagi 9808579, Japan.
[Knopp, Jeremy S.] Air Force Res Lab, Wright Patterson AFB, OH 45443 USA.
RP Yusa, N (reprint author), Tohoku Univ, Grad Sch Engn, Dept Quantum Sci & Energy Engn, Aoba Ku, 6-6-01-2 Aramaki Aza Aoba, Sendai, Miyagi 9808579, Japan.
EM noritaka.yusa@qse.tohoku.ac.jp
FU Asian Office of Aerospace Research and Development (AOARD) Windows on
the World program
FX Jeremy S. Knopp was supported by the Asian Office of Aerospace Research
and Development (AOARD) Windows on the World program for this research.
NR 14
TC 1
Z9 1
U1 1
U2 4
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0022-3131
EI 1881-1248
J9 J NUCL SCI TECHNOL
JI J. Nucl. Sci. Technol.
PD APR 2
PY 2016
VL 53
IS 4
BP 574
EP 579
DI 10.1080/00223131.2015.1064332
PG 6
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA DE9SL
UT WOS:000370979000014
ER
PT J
AU Torres, A
Ganley, J
Maji, A
AF Torres, A.
Ganley, J.
Maji, A.
TI Experimental and Analytical Techniques for Studying ZBLAN
Crystallization in Microgravity
SO EXPERIMENTAL TECHNIQUES
LA English
DT Article
DE ZBLAN; Microgravity; Crystallization
ID GRAVITY; GLASS
AB One of the promising new areas of materials research is in the field of microgravity. Microgravity experimentation enables new materials to be developed and traditional materials to be improved, which cannot be completed under terrestrial conditions. Recent experiments on ZBLAN (ZrF4-BaF2-LaF3-AlF3-NaF) glass have shown that, when heated, there is a crystallization dependency on gravity. This crystallization dependency limits the optical transmissibility of this material, due to crystallites forming during the fiber drawing process. ZBLAN glass has the theoretical potential for optical transmission in the range of 0.3-7 mu m, which would facilitate much needed mid-infrared (IR) fiber technology. Past researchers have completed ZBLAN crystallization microgravity experiments, with limited details on the experimental technique and analysis methods. This study demonstrates an alternative experimental technique for ZBLAN microgravity testing and postprocessing techniques that reveal crystallinity in the sample.
C1 [Torres, A.] Texas State Univ, Dept Engn Technol, San Marcos, TX 78666 USA.
[Ganley, J.] Air Force Res Lab, Space Vehicles Directorate, Albuquerque, NM USA.
[Maji, A.] Univ New Mexico, Dept Civil Engn, Albuquerque, NM 87131 USA.
RP Torres, A (reprint author), Texas State Univ, Dept Engn Technol, San Marcos, TX 78666 USA.
EM ast36@txstate.edu
FU Air Force Space Test Program; NASA
FX The authors of this work would like to thank Dr. Dennis Tucker, the Air
Force Space Test Program, and NASA for their generous support of this
research.
NR 12
TC 0
Z9 0
U1 1
U2 1
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0732-8818
EI 1747-1567
J9 EXP TECHNIQUES
JI Exp. Tech.
PD APR
PY 2016
VL 40
IS 2
BP 501
EP 512
DI 10.1007/s40799-016-0052-6
PG 12
WC Engineering, Mechanical; Mechanics; Materials Science, Characterization
& Testing
SC Engineering; Mechanics; Materials Science
GA DX9YK
UT WOS:000384752900005
ER
PT J
AU Torres, A
Maji, A
Ganley, J
AF Torres, A.
Maji, A.
Ganley, J.
TI The Effect of Microcrystals on ZrF4-BaF2-LaF3-AlF3-NaF Glass Fiber
Fracture
SO EXPERIMENTAL TECHNIQUES
LA English
DT Article
DE ZBLAN; Glass Fiber; Microcrystals; Mid-IR Technology; Fracture; Fiber
Drawing
ID TOUGHNESS
AB The mechanical response of materials to an applied force is determined by the inherent microstructure properties of the material. Microcrystals formed during heating and fiber drawing represent inherent flaws, which play a strong role in the mechanical properties as well as the handling ability of optical waveguides, in particular ZBLAN (ZrF4-BaF2-LaF3-AlF3-NaF) fibers. The property of the fiber to flex and bend is useful for handling and positioning the fiber in a desired application. A series of ZBLAN fibers were bent to specific radii of curvature to determine the applied curvature at which fiber fracture occurs. The fibers were first subjected to a tailored temperature arrangement for a designated amount of time to induce varying amounts of crystal formation. The fiber failure was documented and photographed with the aid of optical microscopy and scanning electron microscopy. Fracture mechanics analysis was used to characterize the impact of crystal size on the failure of the ZBLAN fiber. The results of this assessment show the impact of thermal degradation on ZBLAN fibers as well as suggest an optimum fiber drawing take-up reel diameter.
C1 [Torres, A.] Texas State Univ, Dept Engn Technol, San Marcos, TX 78666 USA.
[Maji, A.] Univ New Mexico, Dept Civil Engn, Albuquerque, NM 87131 USA.
[Maji, A.; Ganley, J.] Air Force Res Lab, Space Vehicles Directorate, Albuquerque, NM 87117 USA.
RP Torres, A (reprint author), Texas State Univ, Dept Engn Technol, San Marcos, TX 78666 USA.
EM ast36@txstate.edu
NR 13
TC 0
Z9 0
U1 0
U2 0
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0732-8818
EI 1747-1567
J9 EXP TECHNIQUES
JI Exp. Tech.
PD APR
PY 2016
VL 40
IS 2
BP 765
EP 776
DI 10.1007/s40799-016-0077-x
PG 12
WC Engineering, Mechanical; Mechanics; Materials Science, Characterization
& Testing
SC Engineering; Mechanics; Materials Science
GA DX9YK
UT WOS:000384752900029
ER
PT J
AU Merkin, VG
Lyon, JG
Lario, D
Arge, CN
Henney, CJ
AF Merkin, V. G.
Lyon, J. G.
Lario, D.
Arge, C. N.
Henney, C. J.
TI Time-dependent magnetohydrodynamic simulations of the inner heliosphere
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID SOLAR-WIND; MAGNETIC-FIELD; MHD SIMULATION; CURRENT SHEET; MODEL; FLUX;
SYSTEM; CORONA; CMES
AB This paper presents results from a simulation study exploring heliospheric consequences of time-dependent changes at the Sun. We selected a 2 month period in the beginning of year 2008 that was characterized by very low solar activity. The heliosphere in the equatorial region was dominated by two coronal holes whose changing structure created temporal variations distorting the classical steady state picture of the heliosphere. We used the Air Force Data Assimilate Photospheric Flux Transport (ADAPT) model to obtain daily updated photospheric magnetograms and drive the Wang-Sheeley-Arge (WSA) model of the corona. This leads to a formulation of a time-dependent boundary condition for our three-dimensional (3-D) magnetohydrodynamic (MHD) model, LFM-helio, which is the heliospheric adaptation of the Lyon-Fedder-Mobarry MHD simulation code. The time-dependent coronal conditions were propagated throughout the inner heliosphere, and the simulation results were compared with the spacecraft located near 1 astronomical unit (AU) heliocentric distance: Advanced Composition Explorer (ACE), Solar Terrestrial Relations Observatory (STEREO-A and STEREO-B), and the MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) spacecraft that was in cruise phase measuring the heliospheric magnetic field between 0.35 and 0.6 AU. In addition, during the selected interval MESSENGER and ACE aligned radially allowing minimization of the effects of temporal variation at the Sun versus radial evolution of structures. Our simulations show that time-dependent simulations reproduce the gross-scale structure of the heliosphere with higher fidelity, while on smaller spatial and faster time scales (e.g., 1 day) they provide important insights for interpretation of the data. The simulations suggest that moving boundaries of slow-fast wind transitions at 0.1 AU may result in the formation of inverted magnetic fields near pseudostreamers which is an intrinsically time-dependent process. Finally, we show that heliospheric current sheet corrugation, which may result in multiple sector boundary crossings when observed by spacecraft, is caused by solar wind velocity shears. Overall, our simulations demonstrate that time-dependent heliosphere modeling is a promising direction of research both for space weather applications and fundamental physics of the heliosphere.
C1 [Merkin, V. G.; Lario, D.] Johns Hopkins Univ, Appl Phys Lab, Johns Hopkins Rd, Laurel, MD 20723 USA.
[Lyon, J. G.] Dartmouth Coll, Dept Phys & Astron, Hanover, NH 03755 USA.
[Arge, C. N.; Henney, C. J.] Air Force Res Lab, Albuquerque, NM USA.
RP Merkin, VG (reprint author), Johns Hopkins Univ, Appl Phys Lab, Johns Hopkins Rd, Laurel, MD 20723 USA.
EM Slava.Merkin@jhuapl.edu
RI Lario, David/D-9318-2016
OI Lario, David/0000-0002-3176-8704
FU NASA [NNX13AG15G, NNX11AO83G]; NSF [AGS-1260358, AGS-1259407]; NSF
FX V.G.M. would like to acknowledge many insightful conversations with
N.-E. Raouafi, M.I. Sitnov, and A. Vourlidas, all at JHU/APL. This
research was supported by NASA grants NNX13AG15G and NNX11AO83G and NSF
grants AGS-1260358 and AGS-1259407. We would like to acknowledge
high-performance computing support from Yellowstone
(ark:/85065/d7wd3xhc) provided by NCAR's Computational and Information
Systems Laboratory, sponsored by the NSF. We acknowledge the ACE/SWEPAM
and ACE/MAG instrument teams, STEREO PLASTIC, IMPACT, and MAG teams, as
well as the ACE and STEREO Science Centers for providing the data used
in this study. We are also grateful to B.J. Anderson and H. Korth at
JHU/APL for providing and NASA PDS for hosting the MESSENGER/MAG data.
The data used to produce figures, animations, and analysis in the paper
are available upon request.
NR 61
TC 1
Z9 1
U1 3
U2 5
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9380
EI 2169-9402
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD APR
PY 2016
VL 121
IS 4
BP 2866
EP 2890
DI 10.1002/2015JA022200
PG 25
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA DR5RO
UT WOS:000379960300005
ER
PT J
AU Clausen, LBN
Moen, JI
Hosokawa, K
Holmes, JM
AF Clausen, L. B. N.
Moen, J. I.
Hosokawa, K.
Holmes, J. M.
TI GPS scintillations in the high latitudes during periods of dayside and
nightside reconnection
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID GRADIENT DRIFT INSTABILITY; POLAR-CAP PATCHES; BIRKELAND CURRENTS;
F-REGION; IONOSPHERIC IRREGULARITIES; PHASE SCINTILLATION; IONIZATION
PATCHES; SOLAR MINIMUM; PLASMA; DENSITY
AB We use an automated procedure to identify periods of enhanced dayside reconnection followed by enhanced nightside reconnection in measurements of the polar cap size by the Active Magnetosphere and Planetary Electrodynamics Response Experiment between January 2010 and December 2012; we find 490 such events. We investigate the dynamics of the spatial distributions of the total electron content (TEC) and phase scintillations of Global Positioning System (GPS) signals across the northern polar region and here report three important findings: (1) While a TEC enhancement (due to polar cap patches) propagates across the polar cap during these events, this enhancement is not associated with significant GPS phase scintillations. (2) Instead, a significant impact on GPS signal quality is first found when the TEC enhancements cross the nightside auroral boundary. (3) In combination with upward field-aligned currents, these TEC enhancements cause the strongest GPS phase scintillations. We conclude that polar cap patches are not, as previously thought, a space weather threat inside the polar cap but instead reveal their biggest impact once they reach the nightside auroral oval, in particular when combined with upward field-aligned currents.
C1 [Clausen, L. B. N.; Moen, J. I.] Univ Oslo, Dept Phys, Oslo, Norway.
[Hosokawa, K.] Univ Electrocommun, Dept Commun Engn & Informat, Tokyo, Japan.
[Holmes, J. M.] Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM USA.
RP Clausen, LBN (reprint author), Univ Oslo, Dept Phys, Oslo, Norway.
EM lasse.clausen@fys.uio.no
OI Holmes, Jeffrey/0000-0003-1025-6694
FU Norwegian Research Council [230935]; Air Force Office of Scientific
Research
FX L. B. N. C. and the auroral imagers at LYR and NAL are supported by
funding from the Norwegian Research Council under grant 230935; the
imager data are publicly available at http://tid.uio.no/plasma/aurora,
and the list of expansion/contraction times is available upon request.
J. M. H. is supported in part by the Air Force Office of Scientific
Research. We thank Svend Erik Ascanius of the Danish Meteorological
Institute and the staff of Station Nord for operating instruments at
Qaanaaq and Station Nord, respectively. The imager data from Qaanaaq and
Station Nord scrutinized for this study have been cleared for public
release and are available upon request from J. M. H. The Resolute Bay
imager data are available at
http://gwave.ice.uec.ac.jp/cgi-bin/hosokawa/resolute/resolute.cgi. The
AMPERE data used in this study were obtained through
http://ampere.jhuapl.edu. The TEC data used in this study were obtained
through the Madrigal database at https://www.eiscat.se/madrigal/. We
would like to thank the CHAIN team for their support; data from CHAIN
are available through http://chain.physics.unb.ca/chain/. The solar wind
data used in this study were obtained through the OMNI webpage at
http://omniweb.gsfc.nasa.gov/ow.html. The geomagnetic indices were
obtained through the World Data Center for Geomagnetism at
http://wdc.kugi.kyoto-u.ac.jp/. The hemispheric power index (HPI) is
available at http://www.swpc.noaa.gov/ftpmenu/lists/hpi.html.
NR 78
TC 3
Z9 3
U1 0
U2 1
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9380
EI 2169-9402
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD APR
PY 2016
VL 121
IS 4
BP 3293
EP 3309
DI 10.1002/2015JA022199
PG 17
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA DR5RO
UT WOS:000379960300033
ER
PT J
AU Mishin, E
Watkins, B
Lehtinen, N
Eliasson, B
Pedersen, T
Grach, S
AF Mishin, Evgeny
Watkins, Brenton
Lehtinen, Nikolai
Eliasson, Bengt
Pedersen, Todd
Grach, Savely
TI Artificial ionospheric layers driven by high-frequency radiowaves: An
assessment
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
DE Observations of HF-driven plasma; turbulence and descending layers are;
summarized; Concept of an ionizing wavefront due; to accelerated
electrons is consistent; with the observations; At high HF powers
Langmuir and; upper hybrid processes coexist
ID STIMULATED ELECTROMAGNETIC EMISSION; HF-INDUCED AIRGLOW; HIGH-LATITUDE
IONOSPHERE; ELECTRON-CYCLOTRON HARMONICS; ION GYROHARMONIC STRUCTURES;
LANGMUIR TURBULENCE; MAGNETIC ZENITH; HEATING EXPERIMENTS;
OPTICAL-EMISSIONS; F-REGION
AB High-power ordinary mode radio waves produce artificial ionization in the F region ionosphere at the European Incoherent Scatter (Tromso, Norway) and High Frequency Active Auroral Research Program (Gakona, Alaska, USA) facilities. We have summarized the features of the excited plasma turbulence and descending layers of freshly ionized (" artificial") plasma. The concept of an ionizing wavefront created by accelerated suprathermal electrons appears to be in accordance with the data. The strong Langmuir turbulence (SLT) regime is revealed by the specific spectral features of incoherent radar backscatter and stimulated electromagnetic emissions. Theory predicts that the SLT acceleration is facilitated in the presence of photoelectrons. This agrees with the intensified artificial plasma production and the greater speeds of descent but weaker incoherent radar backscatter in the sunlit ionosphere. Numerical investigation of propagation of O-mode waves and the development of SLT and descending layers have been performed. The greater extent of the SLT region at the magnetic zenith than that at vertical appears to make magnetic zenith injections more efficient for electron acceleration and descending layers. At high powers, anomalous absorption is suppressed, leading to the Langmuir and upper hybrid processes during the whole heater on period. The data suggest that parametric upper hybrid interactions mitigate anomalous absorption at heating frequencies far from electron gyroharmonics and also generate SLT in the upper hybrid layer. The persistence of artificial plasma at the terminal altitude depends on how close the heating frequency is to the local gyroharmonic.
C1 [Mishin, Evgeny; Pedersen, Todd] Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
[Watkins, Brenton] Univ Alaska Fairbanks, Phys Dept, Fairbanks, AK USA.
[Lehtinen, Nikolai] Univ Bergen, Birkeland Ctr Space Sci, Bergen, Norway.
[Eliasson, Bengt] Univ Strathclyde, Dept Phys, Glasgow, Lanark, Scotland.
[Grach, Savely] Lobachevsky State Univ Nizhny Novgorod, Dept Radiophys, Nizhnii Novgorod, Russia.
RP Mishin, E (reprint author), Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
EM Evgeny.Mishin@us.af.mil
OI Pedersen, Todd/0000-0002-6940-0112
FU Air Force Office of Scientific Research; Engineering and Physical
Sciences Research Council (EPSRC), UK [EP/M009386/1]; DARPA-DSO
[HR0011-09-C-0099]; ONR [N00014-03-1-0165]; Russian Scientific
Foundation [14-12-00706]; European Research Council [320839]; Research
Council of Norway [208028/F50, 216872/F50, 223252/F50]
FX E.M. and T.P. were supported by Air Force Office of Scientific Research.
B.E. was supported by the Engineering and Physical Sciences Research
Council (EPSRC), UK, grant EP/M009386/1. Support for B.W. was provided
by DARPA-DSO under contract HR0011-09-C-0099 and by ONR under grant
N00014-03-1-0165. S.G (section 2.2) was supported by Russian Scientific
Foundation project 14-12-00706. NL was supported by the European
Research Council under the Program FP7/2007-2013)/ERC grant agreement
320839 and the Research Council of Norway under contracts 208028/F50,
216872/F50 and 223252/F50 (CoE). We thank Ranvir Dhillon for providing
the EISCAT UHF radar ion line spectra and the reviewers for valuable
comments. Experimental and simulation data supporting Figures 6-7 and
Figures 9-10 can be requested from B. Watkins (e-mail:
ualaska-watkins@usa.net) and E. Mishin (e-mail:
evgeny.mishin@us.af.mil), respectively.
NR 104
TC 4
Z9 4
U1 2
U2 2
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9380
EI 2169-9402
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD APR
PY 2016
VL 121
IS 4
BP 3497
EP 3524
DI 10.1002/2015JA021823
PG 28
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA DR5RO
UT WOS:000379960300048
ER
PT J
AU Pedatella, NM
Oberheide, J
Sutton, EK
Liu, HL
Anderson, JL
Raeder, K
AF Pedatella, N. M.
Oberheide, J.
Sutton, E. K.
Liu, H. -L.
Anderson, J. L.
Raeder, K.
TI Short-term nonmigrating tide variability in the mesosphere,
thermosphere, and ionosphere
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
DE Short term DE3 variability in; observations is compared with; WACCM plus
DART reanalysis; Short-term variability found to; occur in
MLT,ionosphere, and upper; thermosphere; Several different mechanisms;
combine to generate the short; term variability
ID MIGRATING SOLAR TIDES; LATENT-HEAT RELEASE; PLANETARY-WAVES; DIURNAL
TIDES; EQUATORIAL MESOSPHERE; DATA ASSIMILATION; ATMOSPHERE; MODEL;
SATELLITES; MIDDLE
AB The intraseasonal variability of the eastward propagating nonmigrating diurnal tide with zonal wave number 3 (DE3) during 2007 in the mesosphere, ionosphere, and thermosphere is investigated using a whole atmosphere model reanalysis and satellite observations. The atmospheric reanalysis is based on implementation of data assimilation in the Whole Atmosphere Community Climate Model (WACCM) using the Data Assimilation Research Testbed (DART) ensemble Kalman filter. The tidal variability in the WACCM+ DART reanalysis is compared to the observed variability in the mesosphere and lower thermosphere (MLT) based on the Thermosphere Ionosphere Mesosphere Energetics Dynamics satellite Sounding of the Atmosphere using Broadband Emission Radiometry (TIMED/SABER) observations, in the ionosphere based on Constellation Observing System for Meteorology, Ionosphere, and Climate (COSMIC) observations, and in the upper thermosphere (similar to 475 km) based on Gravity Recovery and Climate Experiment (GRACE) neutral density observations. To obtain the short-term DE3 variability in the MLT and upper thermosphere, we apply the method of tidal deconvolution to the TIMED/SABER observations and consider the difference in the ascending and descending longitudinal wave number 4 structure in the GRACE observations. The results reveal that tidal amplitude changes of 5-10 K regularly occur on short timescales (similar to 10-20 days) in the MLT. Similar variability occurs in the WACCM+ DART reanalysis and TIMED/SABER observations, demonstrating that the short-term variability can be captured in whole atmosphere models that employ data assimilation and in observations by the technique of tidal deconvolution. The impact of the short-term DE3 variability in the MLT on the ionosphere and thermosphere is also clearly evident in the COSMIC and GRACE observations. Analysis of the troposphere forcing in WACCM+ DART and simulations of the Global Scale Wave Model (GSWM) show that the short-term DE3 variability in the MLT is not related to a single source; rather, it is due to a combination of changes in troposphere forcing, zonal mean atmosphere, and wave-wave interactions.
C1 [Pedatella, N. M.] Univ Corp Atmospher Res, COSM Program Off, Boulder, CO 80301 USA.
[Oberheide, J.] Clemson Univ, Dept Phys & Astron, Clemson, SC 29634 USA.
[Sutton, E. K.] Air Force Res Lab, Space Environm Branch, Albuquerque, NM USA.
[Liu, H. -L.] Natl Ctr Atmospher Res, High Altitude Observ, Pob 3000, Boulder, CO 80307 USA.
[Anderson, J. L.; Raeder, K.] Natl Ctr Atmospher Res, Inst Math Appl Geosci, POB 3000, Boulder, CO 80307 USA.
RP Pedatella, NM (reprint author), Univ Corp Atmospher Res, COSM Program Off, Boulder, CO 80301 USA.
EM nickp@ucar.edu
RI Oberheide, Jens/C-6156-2011; Liu, Han-Li/A-9549-2008; Sutton,
Eric/A-1574-2016
OI Oberheide, Jens/0000-0001-6721-2540; Liu, Han-Li/0000-0002-6370-0704;
Sutton, Eric/0000-0003-1424-7189
FU National Science Foundation [AGS-1033112, AGS-1522830]; NSF
[AGS-1139048]; NASA [NNH12CF66C]
FX COSMIC electron density profile observations are distributed by the
COSMIC Data Analysis and Archive Center
(http://cdaac-www.cosmic.ucar.edu/cdaac/). The TIMED/SABER observations
are available at http://saber.gats-inc.com. WACCM+DART simulation output
is archived on the National Center for Atmospheric Research High
Performance Storage System, is available upon request, and is available
upon request from Nicholas Pedatella (nickp@ucar.edu). N.P. acknowledges
support from National Science Foundation grant AGS-1033112 and
AGS-1522830. J.O. was supported by NSF grant AGS-1139048 and NASA award
NNH12CF66C. The National Center for Atmospheric Research is supported by
the National Science Foundation.
NR 68
TC 0
Z9 0
U1 2
U2 5
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9380
EI 2169-9402
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD APR
PY 2016
VL 121
IS 4
BP 3621
EP 3633
DI 10.1002/2016JA022528
PG 13
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA DR5RO
UT WOS:000379960300056
ER
PT J
AU Marasco, PL
Bailey, C
AF Marasco, Peter L.
Bailey, Christopher
TI Wood lens design philosophy based on a binary additive manufacturing
technique
SO OPTICAL ENGINEERING
LA English
DT Article
DE Wood lens; gradient-index lens; optical path length
AB Using additive manufacturing techniques in optical engineering to construct a gradient index (GRIN) optic may overcome a number of limitations of GRIN technology. Such techniques are maturing quickly, yielding additional design degrees of freedom for the engineer. How best to employ these degrees of freedom is not completely clear at this time. This paper describes a preliminary design philosophy, including assumptions, pertaining to a particular printing technique for GRIN optics. It includes an analysis based on simulation and initial component measurement. (C) 2016 Society of Photo-Optical Instrumentation Engineers (SPIE)
C1 [Marasco, Peter L.] Air Force Res Lab, Sensors Directorate, 2241 Avion Circ, Wright Patterson AFB, OH 45433 USA.
[Bailey, Christopher] Leidos, 3745 Pentagon Blvd, Beavercreek, OH 45431 USA.
RP Marasco, PL (reprint author), Air Force Res Lab, Sensors Directorate, 2241 Avion Circ, Wright Patterson AFB, OH 45433 USA.
EM peter.marasco@us.af.mil
NR 7
TC 0
Z9 0
U1 0
U2 0
PU SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA
SN 0091-3286
EI 1560-2303
J9 OPT ENG
JI Opt. Eng.
PD APR
PY 2016
VL 55
IS 4
AR 040502
DI 10.1117/1.OE.55.4.040502
PG 4
WC Optics
SC Optics
GA DL9GX
UT WOS:000375950900003
ER
PT J
AU Ngirmang, GK
Orban, C
Feister, S
Morrison, JT
Frische, KD
Chowdhury, EA
Roquemore, WM
AF Ngirmang, Gregory K.
Orban, Chris
Feister, Scott
Morrison, John T.
Frische, Kyle D.
Chowdhury, Enam A.
Roquemore, W. M.
TI Three dimensional particle-in-cell simulations of electron beams created
via reflection of intense laser light from a water target
SO PHYSICS OF PLASMAS
LA English
DT Article
AB We present 3D Particle-in-Cell (PIC) modeling of an ultra-intense laser experiment by the Extreme Light group at the Air Force Research Laboratory using the Large Scale Plasma (LSP) PIC code. This is the first time PIC simulations have been performed in 3D for this experiment which involves an ultra-intense, short-pulse (30 fs) laser interacting with a water jet target at normal incidence. The laser-energy-to-ejected-electron-energy conversion efficiency observed in 2D(3v) simulations were comparable to the conversion efficiencies seen in the 3D simulations, but the angular distribution of ejected electrons in the 2D(3v) simulations displayed interesting differences with the 3D simulations' angular distribution; the observed differences between the 2D(3v) and 3D simulations were more noticeable for the simulations with higher intensity laser pulses. An analytic plane-wave model is discussed which provides some explanation for the angular distribution and energies of ejected electrons in the 2D(3v) simulations. We also performed a 3D simulation with circularly polarized light and found a significantly higher conversion efficiency and peak electron energy, which is promising for future experiments. (C) 2016 AIP Publishing LLC.
C1 [Ngirmang, Gregory K.; Orban, Chris; Feister, Scott; Chowdhury, Enam A.] Ohio State Univ, Dept Phys, 174 W 18th Ave, Columbus, OH 43210 USA.
[Ngirmang, Gregory K.; Orban, Chris; Feister, Scott; Frische, Kyle D.] Innovat Sci Solut Inc, Plain City, OH 45459 USA.
[Morrison, John T.] CNR, Washington, DC 20001 USA.
[Chowdhury, Enam A.] Intense Energy Solut LLC, Plain City, OH 43064 USA.
[Roquemore, W. M.] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Ngirmang, GK (reprint author), Ohio State Univ, Dept Phys, 174 W 18th Ave, Columbus, OH 43210 USA.; Ngirmang, GK (reprint author), Innovat Sci Solut Inc, Plain City, OH 45459 USA.
EM ngirmang.1@osu.edu
OI Feister, Scott/0000-0003-3588-9025; Chowdhury, Enam/0000-0001-6259-202X
FU Quantum and Non-Equilibrium Processes Division of the Air Force Office
of Scientific Research
FX This research was sponsored by the Quantum and Non-Equilibrium Processes
Division of the Air Force Office of Scientific Research, under the
management of Dr. Enrique Parra, Program Manager. The authors
acknowledge significant support from the Department of Defense High
Performance Computing Modernization Program (DOD HPCMP) Internship
Program. Supercomputer time was used on the DOD HPC Spirit and Garnet
supercomputers. Resources were also used at the Ohio Supercomputer
Center.
NR 15
TC 0
Z9 0
U1 1
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 1070-664X
EI 1089-7674
J9 PHYS PLASMAS
JI Phys. Plasmas
PD APR
PY 2016
VL 23
IS 4
AR 043111
DI 10.1063/1.4945739
PG 9
WC Physics, Fluids & Plasmas
SC Physics
GA DL7YE
UT WOS:000375855500063
ER
PT J
AU Saji, KJ
Tian, K
Snure, M
Tiwari, A
AF Saji, Kachirayil J.
Tian, Kun
Snure, Michael
Tiwari, Ashutosh
TI 2D Tin Monoxide-An Unexplored p-Type van der Waals Semiconductor:
Material Characteristics and Field Effect Transistors
SO ADVANCED ELECTRONIC MATERIALS
LA English
DT Article
ID THIN-FILM TRANSISTORS; STRUCTURE REFINEMENT; LATTICE-DYNAMICS; TIN(II)
OXIDE; SNO; MOBILITY; SURFACE; MOS2; ELECTRON; TRANSITION
AB 2D materials are considered promising candidates for developing next-generation high-performance energy efficient electronic, optoelectronic, and valley-tronic devices. Though metal oxides are widely used in the fabrication of many advanced devices, very little work has been reported on their properties in 2D limit. This article reports the discovery of a new 2D materials system, 2D tin monoxide (SnO). Layer by layer growth of SnO on sapphire and SiO2 substrates is demonstrated using a pulsed laser deposition method. The number of SnO layers is controlled by controlling the number of laser shots during the deposition process. Raman spectroscopic and X-ray photoelectron spectroscopic analysis confirms the formation of phase pure SnO layers. Field effect transistors (FETs) using few layer SnO channels grown on SiO2 substrates are successfully fabricated. These FETs show typical p-channel conduction with field effect mobility ranging from 0.05 to 1.9 cm(2) V-1 s(-1). Field effect mobility varies with the number of SnO layers and decreases on either sides of the optimum layer numbers (12), which is explained based on charge screening and interlayer coupling in layered materials.
C1 [Saji, Kachirayil J.; Tian, Kun; Tiwari, Ashutosh] Univ Utah, Dept Mat Sci & Engn, Nanostruct Mat Res Lab, Salt Lake City, UT 84112 USA.
[Snure, Michael] US Air Force, Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
RP Tiwari, A (reprint author), Univ Utah, Dept Mat Sci & Engn, Nanostruct Mat Res Lab, Salt Lake City, UT 84112 USA.
EM tiwari@eng.utah.edu
FU US National Science Foundation [1121252, 1407650]; Air Force Office of
Scientific Research [13RY03COR]; UGC, Government of India
FX K.J.S. and K.T. contributed equally to this work. The authors want to
thank US National Science Foundation for support through grant#1121252
(MRSEC) and1407650. Research at AFRL was supported by Air Force Office
of Scientific Research (task number 13RY03COR). K.J.S. thanks UGC,
Government of India for Raman post-doctoral fellowship.
NR 55
TC 9
Z9 9
U1 26
U2 46
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 2199-160X
J9 ADV ELECTRON MATER
JI Adv. Electron. Mater.
PD APR
PY 2016
VL 2
IS 4
AR 1500453
DI 10.1002/aelm.201500453
PG 9
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Physics, Applied
SC Science & Technology - Other Topics; Materials Science; Physics
GA DJ6PQ
UT WOS:000374335800022
ER
PT J
AU Malak, ST
Jung, JH
Yoon, YJ
Smith, MJ
Lin, CH
Lin, ZQ
Tsukruk, VV
AF Malak, Sidney T.
Jung, Jaehan
Yoon, Young Jun
Smith, Marcus J.
Lin, Chun Hao
Lin, Zhiqun
Tsukruk, Vladimir V.
TI Large-Area Multicolor Emissive Patterns of Quantum Dot-Polymer Films via
Targeted Recovery of Emission Signature
SO ADVANCED OPTICAL MATERIALS
LA English
DT Article
ID LIGHT-EMITTING-DIODES; CDSE NANOCRYSTALS; TOP-DOWN; PHOTOLUMINESCENCE;
PHOTOACTIVATION; NANOFABRICATION; NANOPARTICLES; ENHANCEMENT; INTERFACE;
DISPLAYS
AB A facile one-step fabrication of large-area multicolored emissive photopatterns in mixed quantum dot-polymer films is demonstrated. This is in sharp contrast to the current photopatterning approaches that utilize only a single quantum dot (QD) component for single-color patterns. Strategies are presented that allow for either selective or collective modification of specific predetermined photoluminescent peaks of green and red QDs during photopattern development. These strategies yield novel patterns and allow for unprecedented control over how the color contrast of the photopattern evolves with continuous light illumination. These results clearly show that the evolution of the emission spectra of a multicolor mixed QD-polymer film can be readily tailored during pattern development, either by careful selection of the excitation wavelength or through combinations of controllably unstable and stable QDs with different recovery rates. Notably, these strategies are simple, fast, and robust, yielding high-resolution microscopic patterns over large areas (up to fractions of a cm(2)). Furthermore, the flexibility and capabilities of these strategies greatly expand the potential applications of multicolor emissive photopatterns, particularly in the areas of sensing, imaging, and lasing systems where it is important to exert delicate control over the intensity of selected colors within specific spatial regions.
C1 [Malak, Sidney T.; Jung, Jaehan; Yoon, Young Jun; Smith, Marcus J.; Lin, Chun Hao; Lin, Zhiqun; Tsukruk, Vladimir V.] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA.
[Smith, Marcus J.] Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
RP Lin, ZQ; Tsukruk, VV (reprint author), Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA.
EM zhiqun.lin@mse.gatech.edu; Vladimir@mse.gatech.edu
FU Air Force Office of Scientific Research (Synthetic photonics
multidisciplinary university research initiative, synthesis,
fabrication, and development) [FA9550-14-1-0037]; U.S. Department of
Energy, Office of Basic Energy Sciences, Division of Materials Sciences
and Engineering [DE-FG02-09ER46604]; UES-AFRL [S-977-022-001]; Office of
Secretary Defense-Test and Evaluation (OSD-TE); National Defense
Education Program (NDEP)/BA-1 [Defense-Wide/PE0601120D8Z]; Basic
Research, SMART Program office Grant [N00244-09-1-0081]
FX Financial support is acknowledged from the Air Force Office of
Scientific Research FA9550-14-1-0037 (Synthetic photonics
multidisciplinary university research initiative, synthesis,
fabrication, and development), the U.S. Department of Energy, Office of
Basic Energy Sciences, Division of Materials Sciences and Engineering
under Award # DE-FG02-09ER46604 (optical measurements), and UES-AFRL
support S-977-022-001 (summer visit to AFRL). M. J. Smith would like to
acknowledge the Science, Mathematics, and Research for Transformation
(SMART) scholarship funded by Office of Secretary Defense-Test and
Evaluation (OSD-T&E), Defense-Wide/PE0601120D8Z National Defense
Education Program (NDEP)/BA-1, Basic Research, SMART Program office
Grant Number N00244-09-1-0081. The authors also thank Ruilong Ma for
designing the GT photomask.
NR 54
TC 5
Z9 5
U1 6
U2 21
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA POSTFACH 101161, 69451 WEINHEIM, GERMANY
SN 2195-1071
J9 ADV OPT MATER
JI Adv. Opt. Mater.
PD APR
PY 2016
VL 4
IS 4
BP 608
EP 619
DI 10.1002/adom.201500670
PG 12
WC Materials Science, Multidisciplinary; Optics
SC Materials Science; Optics
GA DK1RU
UT WOS:000374692300015
ER
PT J
AU Park, M
Kalyanam, K
Darbha, S
Khargonekar, PP
Pachter, M
Chandler, PR
AF Park, Myoungkuk
Kalyanam, Krishnamoorthy
Darbha, Swaroop
Khargonekar, Pramod P.
Pachter, Meir
Chandler, Phillip R.
TI Performance Guarantee of an Approximate Dynamic Programming Policy for
Robotic Surveillance
SO IEEE TRANSACTIONS ON AUTOMATION SCIENCE AND ENGINEERING
LA English
DT Article
DE Approximate dynamic programming; linear programming; robotic
surveillance; stochastic control
ID STATE AGGREGATION; BOUNDS
AB This paper is focused on the development and analysis of suboptimal decision algorithms for a collection of robots that assist a remotely located operator in perimeter surveillance. The operator is tasked with the classification of incursions across the perimeter. whenever there is an incursion into the perimeter, an unattended ground sensor (UGS) in the vicinity, signals an alert. A robot services the alert by visiting the alert location, collecting information, e.g., photo and video imagery, and transmitting it to the operator. The accuracy of operator's classification depends on the volume and freshness of information gathered and provided by the robots at locations where incursions occur. There are two competing objectives for a robot: it needs to spend adequate time at an alert location to collect evidence for aiding the operator in accurate classification but it also needs to service other alerts as soon as possible, so that the evidence collected is relevant. The decision problem is to determine the optimal amount of time a robot must spend servicing an alert. The incursions are stochastic and their statistics are assumed to be known. This problem can be posed as a Markov Decision Problem. However, even for two robots and five UGS locations, the number of states is of the order of billions rendering exact dynamic programming methods intractable. Approximate dynamic programming (ADP) via linear programming (LP) provides a way to approximate the value function and derive suboptimal strategies. The novel feature of this paper is the derivation of a tractable lower bound via LP and the construction of a suboptimal policy whose performance improves upon the lower bound. An illustrative perimeter surveillance example corroborates the results derived in this paper.
C1 [Park, Myoungkuk; Darbha, Swaroop] Texas A&M Univ, Dept Mech Engn, College Stn, TX 77840 USA.
[Kalyanam, Krishnamoorthy] InfoSciTex Corp, Dayton, OH 45431 USA.
[Khargonekar, Pramod P.] Univ Florida, Dept Elect & Comp Engn, Gainesville, FL 32611 USA.
[Pachter, Meir] US Air Force, Inst Technol, Dept Elect Engn, Dayton, OH 45433 USA.
[Chandler, Phillip R.] US Air Force, Res Lab, Autonomous Control Branch, Dayton, OH 45433 USA.
RP Park, M; Darbha, S (reprint author), Texas A&M Univ, Dept Mech Engn, College Stn, TX 77840 USA.; Kalyanam, K (reprint author), InfoSciTex Corp, Dayton, OH 45431 USA.; Khargonekar, PP (reprint author), Univ Florida, Dept Elect & Comp Engn, Gainesville, FL 32611 USA.; Pachter, M (reprint author), US Air Force, Inst Technol, Dept Elect Engn, Dayton, OH 45433 USA.
EM robotian@gmail.com; krishnak@ucla.edu; dswaroop@tamu.edu; ppk@ufl.edu;
meir.pachter@afit.edu
OI Khargonekar, Pramod/0000-0001-6634-6950
FU Air Force Office of Scientific Research (AFOSR) [FA9550-10-1-0392];
National Science Foundation (NSF) [ECCS-1015066]
FX This work was supported in part by the Air Force Office of Scientific
Research (AFOSR) under Award FA9550-10-1-0392 and the National Science
Foundation (NSF) under Award ECCS-1015066. This paper was presented in
part at ASME's Fifth Annual Dynamic Systems and Control Conference, Ft.
Lauderdale, FL, USA, October 2012, and this paper also expands on a
preliminary version presented at the IFAC Conference on Research,
Education and Development of Unmanned Aerial Vehicles, Compiegne,
France, November 2013.
NR 24
TC 0
Z9 0
U1 0
U2 3
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1545-5955
EI 1558-3783
J9 IEEE T AUTOM SCI ENG
JI IEEE Trans. Autom. Sci. Eng.
PD APR
PY 2016
VL 13
IS 2
BP 564
EP 578
DI 10.1109/TASE.2014.2366295
PG 15
WC Automation & Control Systems
SC Automation & Control Systems
GA DJ8DI
UT WOS:000374442300017
ER
PT J
AU Ernst, M
Habtour, E
Dasgupta, A
AF Ernst, Matthew
Habtour, Ed
Dasgupta, Abhijit
TI Examining Steinberg's Octave Rule Applicability for Electronic Systems
Exposed to Multiaxial Vibration
SO IEEE TRANSACTIONS ON COMPONENTS PACKAGING AND MANUFACTURING TECHNOLOGY
LA English
DT Article
DE Amplification; fatigue; multiaxial vibration; nonlinear; random;
reliability
ID PREDICTION; FATIGUE
AB This paper explores the role of nonlinear dynamical phenomena in calculating the stress amplitude in large electronic components exposed to biaxial vibration loading. Nonlinear analytical studies are presented where a component exposed to combined axial and transverse vibratory base excitation is idealized using a nonlinear structural beam element with a tip mass. Harmonic and random base vibration excitation studies are conducted. The results provided in this paper confirm that Steinberg's Octave rule may not be applicable for electronic components exposed to high amplitude multiaxial vibrations. In fact, components exposed to biaxial vibration are highly dependent on the phase angle between the orthogonal axes and the frequency ratio between the axial and transverse excitation frequencies. At critical frequency ratios, undesirable constructive and destructive stress amplification phenomena may appear if the system is exposed to a harsh multidirectional vibration environment.
C1 [Ernst, Matthew] US Air Force, Lifecycle Management Ctr, Wright Patterson AFB, OH 45433 USA.
[Habtour, Ed] US Army, Res Lab, Adelphi, MD 21005 USA.
[Dasgupta, Abhijit] Univ Maryland, Dept Mech Engn, Ctr Adv Life Cycle Engn, College Pk, MD 20742 USA.
RP Ernst, M (reprint author), US Air Force, Lifecycle Management Ctr, Wright Patterson AFB, OH 45433 USA.; Habtour, E (reprint author), US Army, Res Lab, Adelphi, MD 21005 USA.; Dasgupta, A (reprint author), Univ Maryland, Dept Mech Engn, Ctr Adv Life Cycle Engn, College Pk, MD 20742 USA.
EM ernstm@gmail.com; ed.m.habtour.civ@mail.mil; dasgupta@umd.edu
FU CALCE Consortium; TEAM Inc.; Data Physics Inc.
FX This work was supported in part by CALCE Consortium, in part by TEAM
Inc., and in part by Data Physics Inc.
NR 21
TC 0
Z9 0
U1 3
U2 3
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 2156-3950
EI 2156-3985
J9 IEEE T COMP PACK MAN
JI IEEE Trans. Compon. Pack. Manuf. Technol.
PD APR
PY 2016
VL 6
IS 4
BP 561
EP 568
DI 10.1109/TCPMT.2016.2519447
PG 8
WC Engineering, Manufacturing; Engineering, Electrical & Electronic;
Materials Science, Multidisciplinary
SC Engineering; Materials Science
GA DJ9RV
UT WOS:000374551500008
ER
PT J
AU Buffington, BC
Melnyk, BM
Morales, S
Lords, A
Zupan, MR
AF Buffington, Brenda C.
Melnyk, Bernadette M.
Morales, Shelly
Lords, Amanda
Zupan, Michael R.
TI Effects of an energy balance educational intervention and the COPE
cognitive behavioral therapy intervention for Division I US Air Force
Academy female athletes
SO JOURNAL OF THE AMERICAN ASSOCIATION OF NURSE PRACTITIONERS
LA English
DT Article
DE Young adult women; women's health; weight management; stress and coping;
student health; stress; cognitive behavioral therapy (CBT)
AB Background and purpose: Female athletes struggle harder than male athletes to lose body fat and maintain a leaner physique. The purpose of this study was to determine the effects of an educational and cognitive behavioral therapy (CBT)-based intervention on knowledge, body composition, anxiety, stress, and nutritional intake.
Methods: A randomized controlled trial was conducted with 153 female athletes from the U.S. Air Force Academy (USAFA). Participants were assigned to one of three groups: (a) a combined energy balance and CBT-based intervention (E1); (b) a CBT-based intervention alone (E2); and (c) a control group (C). Main outcomes included a DXA scan for body composition, a knowledge test, the GAD-7 for anxiety, the brief inventory of perceived stress (BIPS) for stress, and a 24-h food recall.
Findings: Significant improvement on knowledge of energy balance occurred in all three groups E1 (p < .001), E2, and C (p < .05). Significant reductions in percentage of body fat occurred in E1 (p < .001) and E2 (p < .05). There also were significant reductions in the percent of fat consumed by E1 (p < .05) and saturated fat consumed by both E1 and E2 (p < .05). The control group only demonstrated a significant increase in stress as measured by the BIPS (p < .05).
Conclusions: A combined energy balance and CBT-based intervention improves knowledge and body fat.
Implications: The importance to assess knowledge, anxiety, stress, nutrition intake, and percentage of body fat in female athletes and to deliver evidence-based interventions to improve their health outcomes.
C1 [Buffington, Brenda C.] Ohio State Univ, Coll Nursing, Off Chief Wellness Officer, 398 Newton Hall,1585 Neil Ave, Columbus, OH 43210 USA.
[Melnyk, Bernadette M.] Ohio State Univ, Dept Pediat & Psychiat, Coll Nursing, Columbus, OH 43210 USA.
[Morales, Shelly] US Air Force Acad, Colorado Springs, CO 80840 USA.
[Lords, Amanda] CWPX, Colorado Springs, CO USA.
[Zupan, Michael R.] US Air Force Acad, Human Performance Lab, Colorado Springs, CO 80840 USA.
RP Buffington, BC (reprint author), Ohio State Univ, Coll Nursing, Off Chief Wellness Officer, 398 Newton Hall,1585 Neil Ave, Columbus, OH 43210 USA.
EM buffington.42@osu.edu
NR 17
TC 0
Z9 0
U1 1
U2 1
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 2327-6886
EI 2327-6924
J9 J AM ASSOC NURSE PRA
JI J. Am. Assoc. Nurs. Pract.
PD APR
PY 2016
VL 28
IS 4
SI SI
BP 181
EP 187
DI 10.1002/2327-6924.12359
PG 7
WC Health Care Sciences & Services; Nursing
SC Health Care Sciences & Services; Nursing
GA DK1VO
UT WOS:000374703200002
PM 27007300
ER
PT J
AU Willink, TJ
Squires, CC
Colman, GWK
Muccio, MT
AF Willink, Tricia J.
Squires, Chris C.
Colman, Geoffrey W. K.
Muccio, Michael T.
TI Measurement and Characterization of Low-Altitude Air-to-Ground MIMO
Channels
SO IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
LA English
DT Article
DE Air-to-ground channels; multiple-input-multiple-output (MIMO)
communications; near-field scattering; unmanned aerial vehicles (UAVs)
ID AERONAUTICAL TELEMETRY; MODEL; PERFORMANCE; BAND; COMMUNICATION;
NETWORKS; UAV
AB To support the development of high-capacity air-to-ground links for range extension, measurements of the low-altitude air-to-ground channel were made at 915 MHz. Two transmit antennas were mounted on an unmanned aerial vehicle (UAV), which was flown in loops at an altitude of approximately 200 m above ground level. The received signals were recorded at each of eight antenna elements mounted on a van at locations outside and inside the flight loop. The analysis of the measurements shows that there are regions where the spatial diversity is significant, despite the sparse multipath environment, indicating spatial decorrelation at both the ground and air terminals. The variations in spatial correlation across the receiver array indicate the presence of nonplanar wavefronts produced by the signals' interaction with objects in the array near field, in particular the measurement vehicle. A similar effect is probable at the UAV, and it is expected that more significant near-field effects would arise on a more conventional air platform. These support significant reductions in outage probability at both receiver locations: With appropriate signaling strategies, an airborne platform could provide a viable relay or broadcast node for high-capacity communications using a multiple-input-multiple-output (MIMO) system.
C1 [Willink, Tricia J.; Squires, Chris C.; Colman, Geoffrey W. K.] Commun Res Ctr, Ottawa, ON K2H 8S2, Canada.
[Willink, Tricia J.] Def Res & Dev, Ottawa, ON K1A 0Z4, Canada.
[Muccio, Michael T.] US Air Force, Res Lab, Rome, NY 13441 USA.
RP Willink, TJ; Squires, CC; Colman, GWK (reprint author), Commun Res Ctr, Ottawa, ON K2H 8S2, Canada.; Willink, TJ (reprint author), Def Res & Dev, Ottawa, ON K1A 0Z4, Canada.; Muccio, MT (reprint author), US Air Force, Res Lab, Rome, NY 13441 USA.
EM tricia.willink@drdc-rddc.gc.ca; chris.squires@crc.gc.ca;
geoff.colman@crc.gc.ca; michael.muccio@us.af.mil
FU Defence RD Canada
FX The work at the Communications Research Centre was supported by Defence
R&D Canada. This work was performed in collaboration with The Technical
Cooperation Program. AFRL release case number: 88ABW-2013-5510. This
document contains Information authorized under the auspices of The
Technical Cooperation Program (TTCP) for unlimited release and
distribution. The review of this paper was coordinated by Prof. T.
Kuerner.
NR 35
TC 5
Z9 5
U1 11
U2 16
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9545
EI 1939-9359
J9 IEEE T VEH TECHNOL
JI IEEE Trans. Veh. Technol.
PD APR
PY 2016
VL 65
IS 4
BP 2637
EP 2648
DI 10.1109/TVT.2015.2419738
PG 12
WC Engineering, Electrical & Electronic; Telecommunications; Transportation
Science & Technology
SC Engineering; Telecommunications; Transportation
GA DK6KE
UT WOS:000375031500061
ER
PT J
AU Petersen, CD
Leve, F
Flynn, M
Kolmanovsky, I
AF Petersen, Christopher D.
Leve, Frederick
Flynn, Molly
Kolmanovsky, Ilya
TI Recovering Linear Controllability of an Underactuated Spacecraft by
Exploiting Solar Radiation Pressure
SO JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
LA English
DT Article
ID 2 REACTION WHEELS; ATTITUDE STABILIZATION; RIGID SPACECRAFT; SATELLITE
AB This paper describes a method for recovering linear controllability for the attitude of an underactuated spacecraft by accounting for the effects of solar radiation pressure in the spacecraft attitude model. The developments are based on a spacecraft model that has at least two functional reaction wheels. A solar radiation pressure torque model that is a function of spacecraft attitude is incorporated and, under suitable assumptions, can be simplified for spacecraft with body symmetry. Conditions are given under which a symmetric-body spacecraft will experience zero solar radiation pressure torque. The stability of the underactuated spacecraft model is discussed, and necessary and sufficient conditions are given for linear controllability to be regained when solar radiation pressure torques are included in the spacecraft attitude model. With linear controllability restored, conventional controllers can be designed for underactuated spacecraft. Controllability of a cuboid spacecraft under the influence of solar radiation pressure is then analyzed. Nonlinear simulations illustrate this novel approach to recover pointing by controlling two functioning reaction wheels while two other wheels undergo subsequent failures.
C1 [Petersen, Christopher D.; Flynn, Molly; Kolmanovsky, Ilya] Univ Michigan, Dept Aerosp Engn, Ann Arbor, MI 48109 USA.
[Leve, Frederick] US Air Force Res Lab, Guidance Nav & Control Syst Grp, Kirtland AFB, NM 87117 USA.
[Flynn, Molly] Raytheon Missile Syst, Guidance Nav & Control Syst Grp, Tucson, AZ 85756 USA.
RP Petersen, CD (reprint author), Univ Michigan, Dept Aerosp Engn, Ann Arbor, MI 48109 USA.
NR 30
TC 1
Z9 1
U1 2
U2 2
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0731-5090
EI 1533-3884
J9 J GUID CONTROL DYNAM
JI J. Guid. Control Dyn.
PD APR
PY 2016
VL 39
IS 4
BP 826
EP 837
DI 10.2514/1.G001446
PG 12
WC Engineering, Aerospace; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA DK4BH
UT WOS:000374861000007
ER
PT J
AU Wall, AT
Gee, KL
Neilsen, TB
McKinley, RL
James, MM
AF Wall, Alan T.
Gee, Kent L.
Neilsen, Tracianne B.
McKinley, Richard L.
James, Michael M.
TI Military jet noise source imaging using multisource statistically
optimized near-field acoustical holography
SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
LA English
DT Article
ID AIRCRAFT NOISE; INSTABILITY; DECOMPOSITION; RADIATION; MODELS
AB The identification of acoustic sources is critical to targeted noise reduction efforts for jets on high-performance tactical aircraft. This paper describes the imaging of acoustic sources from a tactical jet using near-field acoustical holography techniques. The measurement consists of a series of scans over the hologram with a dense microphone array. Partial field decomposition methods are performed to generate coherent holograms. Numerical extrapolation of data beyond the measurement aperture mitigates artifacts near the aperture edges. A multisource equivalent wave model is used that includes the effects of the ground reflection on the measurement. Multisource statistically optimized near-field acoustical holography (M-SONAH) is used to reconstruct apparent source distributions between 20 and 1250 Hz at four engine powers. It is shown that M-SONAH produces accurate field reconstructions for both inward and outward propagation in the region spanned by the physical hologram measurement. Reconstructions across the set of engine powers and frequencies suggests that directivity depends mainly on estimated source location; sources farther downstream radiate at a higher angle relative to the inlet axis. At some frequencies and engine powers, reconstructed fields exhibit multiple radiation lobes originating from overlapped source regions, which is a phenomenon relatively recently reported for full-scale jets.
C1 [Wall, Alan T.; McKinley, Richard L.] US Air Force, Res Lab, Battlespace Acoust Branch, Dayton, OH 45433 USA.
[Gee, Kent L.; Neilsen, Tracianne B.] Brigham Young Univ, Dept Phys & Astron, N283 ESC, Provo, UT 84602 USA.
[James, Michael M.] Blue Ridge Res & Consulting LLC, Asheville, NC 28801 USA.
RP Wall, AT (reprint author), US Air Force, Res Lab, Battlespace Acoust Branch, Dayton, OH 45433 USA.
EM alantwall@gmail.com
FU U.S. Air Force Research Laboratory (USAFRL) through the SBIR program;
Cooperative Research and Development Agreement among Blue Ridge Research
and Consulting; Brigham Young University; Air Force
FX The authors gratefully acknowledge funding from the U.S. Air Force
Research Laboratory (USAFRL) through the SBIR program and support
through a Cooperative Research and Development Agreement among Blue
Ridge Research and Consulting, Brigham Young University, and the Air
Force. This research was supported in part by the appointment of A.T.W.
to the Postgraduate Research Participation Program at the U.S. Air Force
Research Laboratory, 711th Human Performance Wing, Human Effectiveness
Directorate, Warfighter Interface Division, Battlespace Acoustics Branch
administered by the Oak Ridge Institute for Science and Education
through an interagency agreement between the U.S. Department of Energy
and USAFRL.
NR 52
TC 0
Z9 0
U1 3
U2 6
PU ACOUSTICAL SOC AMER AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 0001-4966
EI 1520-8524
J9 J ACOUST SOC AM
JI J. Acoust. Soc. Am.
PD APR
PY 2016
VL 139
IS 4
BP 1938
EP 1950
DI 10.1121/1.4945719
PG 13
WC Acoustics; Audiology & Speech-Language Pathology
SC Acoustics; Audiology & Speech-Language Pathology
GA DK5QN
UT WOS:000374974900046
PM 27106340
ER
PT J
AU Terpening, CD
Kunz, DL
Dickerson, SM
AF Terpening, Christopher D.
Kunz, Donald L.
Dickerson, Stephen M.
TI Characterization of CH-47D Rotor System Fault Signatures Using a
Comprehensive Model
SO JOURNAL OF THE AMERICAN HELICOPTER SOCIETY
LA English
DT Article
AB An investigation of rotor smoothing adjustments using a comprehensive model of the CH-47D helicopter in the Rotorcraft Comprehensive Analysis System (RCAS) was undertaken to assess the capabilities of simulations to support the development of condition-based maintenance systems. Tip weight, pitch link, and trim tab adjustments were modeled in RCAS, and simulations were performed using both a uniform inflow model and a prescribed wake model. Trim and periodic solution methods were also explored. Calculations showed that the periodic solution method did not always produce acceptable results, and the prescribed wake model was preferred over uniform inflow because of the trim tab results. Comparisons of computed results with empirical rotor smoothing coefficients showed that this model was not sufficiently accurate for training condition-based maintenance systems, but did exhibit certain characteristics that presage the potential of an enhanced model with increased fidelity.
C1 [Terpening, Christopher D.] US Air Force, Wright Patterson AFB, OH USA.
[Kunz, Donald L.] Air Force Inst Technol, Wright Patterson AFB, OH USA.
[Dickerson, Stephen M.] US Marine Corps, Pensacola, FL USA.
RP Kunz, DL (reprint author), Air Force Inst Technol, Wright Patterson AFB, OH USA.
EM donald.kunz@afit.edu
FU U.S. Army Aviation Engineering Directorate, AMRDEC
FX The authors would like acknowledge the valuable technical support
provided by Dr. Hossein-Ali Saberi from Advanced Rotorcraft Technology,
Inc., Dr. Robert A. Ormiston from the U.S. Army Aeroflightdynamics
Directorate, and Dr. Christian R. Brackbill from the U.S. Army Aviation
Engineering Directorate, AMRDEC. Partial funding for this research was
provided by the U.S. Army Aviation Engineering Directorate, AMRDEC. The
views expressed in this document are those of the authors and do not
reflect the official policy or position of the U.S. Air Force,
Department of Defense, or the U.S. Government.
NR 13
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U1 0
U2 0
PU AMER HELICOPTER SOC INC
PI ALEXANDRIA
PA 217 N WASHINGTON ST, ALEXANDRIA, VA 22314 USA
SN 0002-8711
EI 2161-6027
J9 J AM HELICOPTER SOC
JI J. Am. Helicopter Soc.
PD APR
PY 2016
VL 61
IS 2
AR 022012
DI 10.4050/JAHS.61.022012
PG 18
WC Engineering, Aerospace
SC Engineering
GA DK3UI
UT WOS:000374842500012
ER
PT J
AU Leger, T
Bisek, N
Poggie, J
AF Leger, Timothy
Bisek, Nicholas
Poggie, Jonathan
TI Computations of Turbulent Flow over a Sharp Fin at Mach 5
SO JOURNAL OF THERMOPHYSICS AND HEAT TRANSFER
LA English
DT Article
ID BOUNDARY-LAYER INTERACTIONS; NAVIER-STOKES EQUATIONS; SHOCK-WAVE; LINE
RELAXATION; FLOWFIELD
AB Reynolds-averaged Navier-Stokes simulations were carried out for sharp fin-induced shock wave/turbulent boundary-layer interactions at Mach 5. Calculations were executed for two fin angles of attack, with each case employing four turbulence models. The computational results were compared with vetted experimental data. For all the cases considered, the calculations replicated the experimentally observed flow structure, which is primarily determined by inviscid, rotational flow effects. Predictions of parameters dominated by viscous effects tended to be less accurate. The predictions of the different turbulence models were qualitatively consistent, but the predicted peak skin friction and wall heat flux varied by as much as a factor of two between the models. The discrepancies between computation and experiment are believed to be a result of large-scale unsteadiness and three dimensionality, which are not captured well by conventional turbulence models.
C1 [Leger, Timothy] US Air Force, Res Lab, Ohio Aerosp Inst, Wright Patterson AFB, OH 45433 USA.
[Bisek, Nicholas; Poggie, Jonathan] US Air Force, Res Lab, Hyperson Sci Branch, Wright Patterson AFB, OH 45433 USA.
[Poggie, Jonathan] Purdue Univ, Sch Aeronaut & Astronaut, W Lafayette, IN 47907 USA.
RP Leger, T (reprint author), US Air Force, Res Lab, Ohio Aerosp Inst, Wright Patterson AFB, OH 45433 USA.
EM timothy.leger.ctr@us.af.mil
FU U.S. Air Force Office of Scientific Research
FX This project was funded in part by grants from the U.S. Air Force Office
of Scientific Research, monitored by J. Schmisseur and Leyva. The
authors wish to thank the U.S. Air Force Research Laboratory Department
of Defense (DoD) Supercomputing Resource Center for computer time and G.
Candler for the use of the US3D solver. Additional computer hours were
provided under a DoD High-Performance Computing Modernization Program
Frontier Project (R. Gosse, Principal Investigator).
NR 33
TC 0
Z9 0
U1 4
U2 6
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0887-8722
EI 1533-6808
J9 J THERMOPHYS HEAT TR
JI J. Thermophys. Heat Transf.
PD APR
PY 2016
VL 30
IS 2
BP 394
EP 402
DI 10.2514/1.T4698
PG 9
WC Thermodynamics; Engineering, Mechanical
SC Thermodynamics; Engineering
GA DK4CA
UT WOS:000374863100015
ER
PT J
AU Yarnell, JE
McCusker, CE
Leeds, AJ
Breaux, JM
Castellano, FN
AF Yarnell, James E.
McCusker, Catherine E.
Leeds, Alexander J.
Breaux, Josue M.
Castellano, Felix N.
TI Exposing the Excited-State Equilibrium in an Ir-III Bichromophore: A
Combined Time Resolved Spectroscopy and Computational Study
SO EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
LA English
DT Article
DE Iridium; Chromophores; Luminescence; Photophysics; Electronic structure;
Density functional calculations; Triplet states; Transient absorption
kinetics
ID CYCLOMETALATED IRIDIUM(III) COMPLEXES; EMITTING ELECTROCHEMICAL-CELLS;
TRANSITION-METAL-COMPLEXES; EFFECTIVE CORE POTENTIALS; TRIPLET
ENERGY-TRANSFER; PHOTOINDUCED HYDROGEN-PRODUCTION; ELECTROLUMINESCENT
DEVICES; MOLECULAR CALCULATIONS; INFRARED-SPECTROSCOPY; LIGHT
AB The electronic structure and photophysical properties of a luminescent Ir-III bis-cyclometalated complex covalently attached to one 4-piperidinyl-1,8-naphthalimide (PNI) chromophore through a coordinated 1,10-phenanthroline, [Ir(ppy)(2)-(phen-PNI)](PF6), is presented. This bichromophore represents a new class of visible light-harvesting Ir-III complexes that exhibit markedly enhanced room-temperature excited-state lifetimes (tau = 8.8 ms) as a result of intervening ligand-centered triplet states present on the pendant naphthalimide chromophore. In this Ir-III complex, the intense singlet fluorescence of the pendant PNI chromophore is nearly quantitatively quenched and was found to sensitize the Ir-III metal/ligand-to-ligand charge-transfer (MLLCT) excited state. The excited state ultimately returns to the PNI chromophore as a long-lived excited triplet that disposes of its energy by equilibrating with the photoluminescent Ir-III MLLCT excited state. Evidence of the excited-state equilibrium is provided through static and dynamic photoluminescence spectroscopy, transient absorption spectroscopy, and time-dependent density functional theory calculations.
C1 [Yarnell, James E.; McCusker, Catherine E.; Castellano, Felix N.] N Carolina State Univ, Dept Chem, Box 8204, Raleigh, NC 27695 USA.
[Yarnell, James E.; Leeds, Alexander J.; Breaux, Josue M.] US Air Force Acad, Dept Chem, Colorado Springs, CO 80840 USA.
[Yarnell, James E.; Leeds, Alexander J.; Breaux, Josue M.] US Air Force Acad, Chem Res Ctr, Colorado Springs, CO 80840 USA.
RP Castellano, FN (reprint author), N Carolina State Univ, Dept Chem, Box 8204, Raleigh, NC 27695 USA.
EM fncastel@ncsu.edu
RI McCusker, Catherine/B-6986-2013
OI McCusker, Catherine/0000-0002-0471-9034
FU U.S. Department of Energy, Office of Science, Office of Basic Energy
Sciences [DE-SC0011979]; Air Force Institute of Technology (AFIT); Air
Force Office of Scientific Research (AFOSR)
FX This material is based upon work supported by the U.S. Department of
Energy, Office of Science, Office of Basic Energy Sciences, under Award
Number DE-SC0011979. J.E.Y. was supported by the Air Force Institute of
Technology (AFIT) and the Air Force Office of Scientific Research
(AFOSR).
NR 76
TC 3
Z9 3
U1 8
U2 16
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA POSTFACH 101161, 69451 WEINHEIM, GERMANY
SN 1434-1948
EI 1099-0682
J9 EUR J INORG CHEM
JI Eur. J. Inorg. Chem.
PD APR
PY 2016
IS 12
BP 1808
EP 1818
DI 10.1002/ejic.201600194
PG 11
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA DK1VE
UT WOS:000374702100006
ER
PT J
AU Blasch, K
Kolivosky, J
Hill, B
AF Blasch, Kyle
Kolivosky, John
Hill, Barry
TI Occupational exposures among personnel working near combined burn pit
and incinerator operations at Bagram Airfield, Afghanistan
SO INHALATION TOXICOLOGY
LA English
DT Article
DE Burn pit; incinerator; inhalation exposurePAHparticulate matter
ID RESPIRATORY SYMPTOMS; MILITARY PERSONNEL; DEPLOYED SETTINGS; HEALTH;
IRAQ; EMISSIONS; VETERANS; ILLNESS; INJURY; IMPACT
AB Occupational air samples were collected at Bagram Airfield Afghanistan for security forces (SF) stationed at the perimeter of the solid waste disposal facility that included a burn pit, air curtain destructors, and solid waste and medical waste incinerators. The objective of the investigation was to quantify inhalation exposures of workers near the disposal facility. Occupational air sample analytes included total particulates not otherwise specified (PNOS), respirable PNOS, acrolein and polyaromatic hydrocarbons (PAH). Exposures were measured for four SF job specialties. Thirty 12-hour shifts were monitored from November 2011 to March 2012. The geometric means for respirable particulate matter and PAH for all job specialties were below the 12-hour adjusted American Conference of Governmental Industrial Hygienists threshold limit value time weighted averages (TLV-TWA). The geometric mean of the respirable particulate matter 12-hour TWAs for the four job specialties ranged from 0.116 to 0.134 mg/m(3). One measurement collected at the tower (3.1 mg/m(3)) position exceeded the TLV-TWA. Naphthalene and pyrene were the only PAHs detected in multiple samples of the 18 PAHs analyzed. The geometric mean concentration for naphthalene was 9.39E-4 mg/m(3) and the maximum concentration was 0.0051 mg/m(3). The geometric mean of acrolein for the four job specialties ranged from 0.021 to 0.047 mg/m(3). There were four exceedances of the Occupational Safety and Health Administration 8-hour permissible exposure limit-time weighted average (PEL-TWA), respectively, ranging from 0.13 to 0.32 mg/m(3).
C1 [Blasch, Kyle] USAF, 230 Collins Rd, Boise, ID 83702 USA.
[Kolivosky, John] US Army, Inst Publ Hlth, Aberdeen Proving Ground, MD USA.
[Hill, Barry] US Air Force Sch Aerosp Med, Wright Patterson AFB, OH USA.
RP Blasch, K (reprint author), USAF, 230 Collins Rd, Boise, ID 83702 USA.
EM kblasch@usgs.gov
FU U.S. Department of Defense
FX Funding for this investigation was provided by the U.S. Department of
Defense.
NR 30
TC 1
Z9 1
U1 5
U2 6
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0895-8378
EI 1091-7691
J9 INHAL TOXICOL
JI Inhal. Toxicol.
PD APR
PY 2016
VL 28
IS 5
BP 216
EP 225
DI 10.3109/08958378.2016.1145768
PG 10
WC Toxicology
SC Toxicology
GA DK0VX
UT WOS:000374631400002
PM 27092584
ER
PT J
AU Lincoln, KP
Sun, AYT
Prihoda, TJ
Sutton, AJ
AF Lincoln, Ketu P.
Sun, Albert Y. T.
Prihoda, Thomas J.
Sutton, Alan J.
TI Comparative Accuracy of Facial Models Fabricated Using Traditional and
3D Imaging Techniques
SO JOURNAL OF PROSTHODONTICS-IMPLANT ESTHETIC AND RECONSTRUCTIVE DENTISTRY
LA English
DT Article
DE Moulage; facial prosthetics; 3D imaging; 3D models; dental materials;
stereolithography; rapid prototyping
ID BEAM COMPUTED-TOMOGRAPHY; DIGITAL 3-DIMENSIONAL PHOTOGRAMMETRY;
ANTHROPOMETRIC PRECISION; RELIABILITY; IMAGES; STEREOPHOTOGRAMMETRY;
SYSTEM; GENEX; CORPS; HEAD
AB PurposeThe purpose of this investigation was to compare the accuracy of facial models fabricated using facial moulage impression methods to the three-dimensional printed (3DP) fabrication methods using soft tissue images obtained from cone beam computed tomography (CBCT) and 3D stereophotogrammetry (3D-SPG) scans.
Materials and MethodsA reference phantom model was fabricated using a 3D-SPG image of a human control form with ten fiducial markers placed on common anthropometric landmarks. This image was converted into the investigation control phantom model (CPM) using 3DP methods. The CPM was attached to a camera tripod for ease of image capture. Three CBCT and three 3D-SPG images of the CPM were captured. The DICOM and STL files from the three 3dMD and three CBCT were imported to the 3DP, and six testing models were made. Reversible hydrocolloid and dental stone were used to make three facial moulages of the CPM, and the impressions/casts were poured in type IV gypsum dental stone. A coordinate measuring machine (CMM) was used to measure the distances between each of the ten fiducial markers. Each measurement was made using one point as a static reference to the other nine points. The same measuring procedures were accomplished on all specimens. All measurements were compared between specimens and the control. The data were analyzed using ANOVA and Tukey pairwise comparison of the raters, methods, and fiducial markers.
ResultsThe ANOVA multiple comparisons showed significant difference among the three methods (p < 0.05). Further, the interaction of methods versus fiducial markers also showed significant difference (p < 0.05). The CBCT and facial moulage method showed the greatest accuracy.
Conclusions3DP models fabricated using 3D-SPG showed statistical difference in comparison to the models fabricated using the traditional method of facial moulage and 3DP models fabricated from CBCT imaging. 3DP models fabricated using 3D-SPG were less accurate than the CPM and models fabricated using facial moulage and CBCT imaging techniques.
C1 [Lincoln, Ketu P.] USAF, Dept Grad Prosthodont, Joint Base San Antonio L, TX USA.
[Sun, Albert Y. T.] Natl Taipei Univ Technol, Dept Mech Engn, Taipei 106, Taiwan.
[Prihoda, Thomas J.] Univ Texas Hlth Sci Ctr San Antonio, Dept Pathol, San Antonio, TX 78229 USA.
[Sutton, Alan J.] Univ Colorado, Dept Restorat Dent, Sch Dent Med, Aurora, CO USA.
RP Sun, AYT (reprint author), Natl Taipei Univ Technol, Dept Mech Engn, Taipei 106, Taiwan.; Sutton, AJ (reprint author), 13045 E 17th Ave Ste F845, Aurora, CO 80045 USA.
EM albertsunasun@gmail.com; Alan.sutton@ucdenver.edu
NR 44
TC 0
Z9 0
U1 8
U2 19
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1059-941X
EI 1532-849X
J9 J PROSTHODONT
JI J. Prosthodont.
PD APR
PY 2016
VL 25
IS 3
BP 207
EP 215
DI 10.1111/jopr.12358
PG 9
WC Dentistry, Oral Surgery & Medicine
SC Dentistry, Oral Surgery & Medicine
GA DJ6UI
UT WOS:000374348300004
PM 26381058
ER
PT J
AU Connelly, BC
Steenbergen, EH
Smith, HE
Elhamri, S
Mitchel, WC
Mou, S
Metcalfe, GD
Brown, GJ
Wraback, M
AF Connelly, Blair C.
Steenbergen, Elizabeth H.
Smith, Howard E.
Elhamri, Said
Mitchel, William C.
Mou, Shin
Metcalfe, Grace D.
Brown, Gail J.
Wraback, Michael
TI Dependence of minority carrier lifetime of Be-doped InAs/InAsSb type-II
infrared superlattices on temperature and doping density
SO PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
LA English
DT Article; Proceedings Paper
CT Compound Semiconductor Week (CSW) / 42nd International Symposium on
Compound Semiconductors (ISCS) / 27th International Conferences on
Indium Phos-phide and Related Materials (IPRM)
CY JUN 28-JUL 02, 2015
CL Santa Barbara, CA
DE beryllium doping; InAs; minority-carrier lifetime; time-resolved
photoluminescence; type-II superlattices
AB We investigate the minority carrier lifetime of Be-doped InAs/InAsSb type-II superlattices as a function of doping density and temperature using time-resolved photoluminescence (TRPL) to determine if switching the superlattice type from the typical n-type residual carrier concentration to p-type may improve device performance by improving the lifetime-mobility product. The introduction of the Be dopant to the superlattice reduces the carrier lifetime, first by a factor of approximate to 3 for doping densities near or below the n-type residual carrier concentration, then by an order of magnitude for samples doped well above the residual carrier concentration. Further, the higher-doped p-type samples demonstrate two distinct TRPL decay regimes and two peaks in the PL spectra, suggesting the formation of an additional acceptor-related recombination pathway leading to the observed shorter carrier lifetime.
C1 [Connelly, Blair C.; Metcalfe, Grace D.; Wraback, Michael] US Army, Res Lab, Sensors & Elect Devices Directorate, Adelphi, MD 20783 USA.
[Steenbergen, Elizabeth H.; Mitchel, William C.; Mou, Shin; Brown, Gail J.] US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Smith, Howard E.] Univ Dayton, Res Inst, Dayton, OH 45469 USA.
[Elhamri, Said] Univ Dayton, Dept Phys, Dayton, OH 45469 USA.
RP Connelly, BC (reprint author), US Army, Res Lab, Sensors & Elect Devices Directorate, Adelphi, MD 20783 USA.
EM blair.connelly.civ@mail.mil; elizabeth.steenbergen.1@us.af.mil
NR 17
TC 0
Z9 0
U1 7
U2 15
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA POSTFACH 101161, 69451 WEINHEIM, GERMANY
SN 0370-1972
EI 1521-3951
J9 PHYS STATUS SOLIDI B
JI Phys. Status Solidi B-Basic Solid State Phys.
PD APR
PY 2016
VL 253
IS 4
BP 630
EP 634
DI 10.1002/pssb.201552497
PG 5
WC Physics, Condensed Matter
SC Physics
GA DJ3YL
UT WOS:000374142500005
ER
PT J
AU Walsh, AJ
Sharick, JT
Skala, MC
Beier, HT
AF Walsh, Alex J.
Sharick, Joe T.
Skala, Melissa C.
Beier, Hope T.
TI Temporal binning of time-correlated single photon counting data improves
exponential decay fits and imaging speed
SO BIOMEDICAL OPTICS EXPRESS
LA English
DT Article
ID FLUORESCENCE LIFETIME; RESOLVED FLUORESCENCE; BREAST-CANCER; IN-VIVO;
MICROSCOPY; FRET; NADH; DECONVOLUTION; ARRAYS; CELLS
AB Time-correlated single photon counting (TCSPC) enables acquisition of fluorescence lifetime decays with high temporal resolution within the fluorescence decay. However, many thousands of photons per pixel are required for accurate lifetime decay curve representation, instrument response deconvolution, and lifetime estimation, particularly for two-component lifetimes. TCSPC imaging speed is inherently limited due to the single photon per laser pulse nature and low fluorescence event efficiencies (<10%) required to reduce bias towards short lifetimes. Here, simulated fluorescence lifetime decays are analyzed by SPCImage and SLIM Curve software to determine the limiting lifetime parameters and photon requirements of fluorescence lifetime decays that can be accurately fit. Data analysis techniques to improve fitting accuracy for low photon count data were evaluated. Temporal binning of the decays from 256 time bins to 42 time bins significantly (p<0.0001) improved fit accuracy in SPCImage and enabled accurate fits with low photon counts (as low as 700 photons/decay), a 6-fold reduction in required photons and therefore improvement in imaging speed. Additionally, reducing the number of free parameters in the fitting algorithm by fixing the lifetimes to known values significantly reduced the lifetime component error from 27.3% to 3.2% in SPCImage (p<0.0001) and from 50.6% to 4.2% in SLIM Curve (p<0.0001). Analysis of nicotinamide adenine dinucleotide-lactate dehydrogenase (NADH-LDH) solutions confirmed temporal binning of TCSPC data and a reduced number of free parameters improves exponential decay fit accuracy in SPCImage. Altogether, temporal binning (in SPCImage) and reduced free parameters are data analysis techniques that enable accurate lifetime estimation from low photon count data and enable TCSPC imaging speeds up to 6x and 300x faster, respectively, than traditional TCSPC analysis. (C) 2016 Optical Society of America
C1 [Walsh, Alex J.] CNR, Jbsa Ft Sam Houston, TX 78234 USA.
[Walsh, Alex J.; Beier, Hope T.] US Air Force, Human Effectiveness Directorate, Bioeffects Div, Optic Radiat Bioeffects Branch, 711th Human Performance Wing, Jbsa Ft Sam Houston, TX 78234 USA.
[Sharick, Joe T.; Skala, Melissa C.] Vanderbilt Univ, Dept Biomed Engn, Nashville, TN 37235 USA.
RP Beier, HT (reprint author), US Air Force, Human Effectiveness Directorate, Bioeffects Div, Optic Radiat Bioeffects Branch, 711th Human Performance Wing, Jbsa Ft Sam Houston, TX 78234 USA.
EM hope.beier.1@us.af.mil
FU National Research Council; AFOSR [14RH02COR, R01 CA185747]; NSF GRFP
FX Funding sources include the National Research Council Research
Associateship Program (AW), AFOSR LRIR#14RH02COR, R01 CA185747, and the
NSF GRFP (JTS).
NR 31
TC 1
Z9 1
U1 3
U2 6
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 2156-7085
J9 BIOMED OPT EXPRESS
JI Biomed. Opt. Express
PD APR 1
PY 2016
VL 7
IS 4
BP 1385
EP 1399
DI 10.1364/BOE.7.001385
PG 15
WC Biochemical Research Methods; Optics; Radiology, Nuclear Medicine &
Medical Imaging
SC Biochemistry & Molecular Biology; Optics; Radiology, Nuclear Medicine &
Medical Imaging
GA DI8UY
UT WOS:000373778900026
PM 27446663
ER
PT J
AU Wettemann, R
AF Wettemann, Robert
TI Sacrificing Soldiers on the National Mall
SO JOURNAL OF MILITARY HISTORY
LA English
DT Book Review
C1 [Wettemann, Robert] US Air Force Acad, Colorado Springs, CO 80840 USA.
RP Wettemann, R (reprint author), US Air Force Acad, Colorado Springs, CO 80840 USA.
NR 1
TC 0
Z9 0
U1 0
U2 0
PU SOC MILITARY HISTORY
PI LEXINGTON
PA C/O VIRGINIA MILITARY INST, GEORGE C MARSHALL LIBRARY, LEXINGTON, VA
24450-1600 USA
SN 0899-3718
EI 1543-7795
J9 J MILITARY HIST
JI J. Mil. Hist.
PD APR
PY 2016
VL 80
IS 2
BP 616
EP 617
PG 2
WC History
SC History
GA DI8KZ
UT WOS:000373751200075
ER
PT J
AU Satko, DP
Shaffer, JB
Tiley, JS
Semiatin, SL
Pilchak, AL
Kalidindi, SR
Kosaka, Y
Glavicic, MG
Salem, AA
AF Satko, Daniel P.
Shaffer, Joshua B.
Tiley, Jaimie S.
Semiatin, S. Lee
Pilchak, Adam L.
Kalidindi, Surya R.
Kosaka, Yoji
Glavicic, Michael G.
Salem, Ayman A.
TI Effect of microstructure on oxygen rich layer evolution and its impact
on fatigue life during high-temperature application of alpha/beta
titanium
SO ACTA MATERIALIA
LA English
DT Article
DE Oxygen-rich layer; Alpha case; alpha/beta titanium alloys; Lifing;
Thermal protection systems
ID TI-6AL-2SN-4ZR-2MO ALLOY; MECHANICAL-PROPERTIES; HEAT-TREATMENT;
BETA-TITANIUM; OXIDATION; TI-6AL-4V; PREDICTION; EXPOSURE
AB The near alpha titanium alloy, Ti-6424S, is utilized in many critical high-temperature aerospace components due to its unique properties. However, oxygen ingress during elevated-temperature exposure induces formation of a subsurface brittle oxygen-rich layer (ORL), resulting in a deterioration of mechanical performance. This paper, for the first time, establishes the effect of the underlying microstructure on the formation and evolution of the ORL in 413 titanium alloys. In addition, models were developed to predict (i) the evolution of ORL as a function of the material microstructure, (ii) the effect of ORL on the critical strain for in-service crack initiation, and (iii) estimates of fatigue life of components made from a specific microstructure during in-service high temperature exposure and formation of ORL. In particular, five different microstructures were produced by tailored heat-treatments and thermally exposed at 650 degrees C up to 420 h. The base metal and the ORL were quantified using microhardness indentations, optical microscopy, and scanning electron microscopy (electron backscatter diffraction (EBSD), backscattered electron (BSE), and secondary electron (SE) imaging). The effective diffusion coefficients (Deg) for each microstructure were calculated and then integrated into a critical strain model to predict crack initiation strain as a function of exposure time. The predicted ORL thickness was used to estimate fatigue life using experimentally measured crack growth data. The largest Deg coefficient was observed in a colony microstructure, while a basketweave microstructure showed the smallest Deft. For several bimodal microstructures, Deg was noted to increase with increasing area fraction of secondary alpha colonies. (C) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
C1 [Satko, Daniel P.; Shaffer, Joshua B.; Salem, Ayman A.] Mat Resources LLC, 714 E Monument Ave,Suite 130, Dayton, OH 45402 USA.
[Tiley, Jaimie S.; Semiatin, S. Lee; Pilchak, Adam L.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH USA.
[Kalidindi, Surya R.] Georgia Inst Technol, Woodruff Sch Mech Engn, Atlanta, GA 30332 USA.
[Kosaka, Yoji] TIMET Henderson Tech Lab, Henderson, NV 89015 USA.
[Glavicic, Michael G.] Rolls Royce Corp, Indianapolis, IN 46206 USA.
RP Satko, DP (reprint author), Mat Resources LLC, 714 E Monument Ave,Suite 130, Dayton, OH 45402 USA.
EM dan.satko@icmrl.net
RI SEMIATIN, SHELDON/E-7264-2017
FU SBIR [FA8650-13-C-5178]
FX This work was performed as part of the in-house research activities of
Materials Resources LLC under a SBIR contract from the Air Force
Research Laboratory, Materials and Manufacturing Directorate, AFRL/RXCM,
Wright-Patterson Air Force Base, OH (Dr. J. Tiley program manager). DPS,
JBS, AAS, SRK were supported under SBIR contract FA8650-13-C-5178.
NR 40
TC 0
Z9 0
U1 12
U2 18
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1359-6454
EI 1873-2453
J9 ACTA MATER
JI Acta Mater.
PD APR 1
PY 2016
VL 107
BP 377
EP 389
DI 10.1016/j.actamat.2016.01.058
PG 13
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA DI3SU
UT WOS:000373419600035
ER
PT J
AU Shade, PA
Menasche, DB
Bernier, JV
Kenesei, P
Park, JS
Suter, RM
Schuren, JC
Turner, TJ
AF Shade, Paul A.
Menasche, David B.
Bernier, Joel V.
Kenesei, Peter
Park, Jun-Sang
Suter, Robert M.
Schuren, Jay C.
Turner, Todd J.
TI Fiducial marker application method for position alignment of in situ
multimodal X-ray experiments and reconstructions
SO JOURNAL OF APPLIED CRYSTALLOGRAPHY
LA English
DT Article
DE high-energy diffraction microscopy; HEDM; X-ray diffraction;
three-dimensional characterization; microstructure; fiducial markers
ID DIFFRACTION CONTRAST TOMOGRAPHY; POLYCRYSTALLINE MATERIALS; GRAIN;
MICROSCOPY; MICROTOMOGRAPHY; OPPORTUNITIES; ORIENTATION; TOOL
AB An evolving suite of X-ray characterization methods are presently available to the materials community, providing a great opportunity to gain new insight into material behavior and provide critical validation data for materials models. Two critical and related issues are sample repositioning during an in situ experiment and registration of multiple data sets after the experiment. To address these issues, a method is described which utilizes a focused ion-beam scanning electron microscope equipped with a micromanipulator to apply gold fiducial markers to samples for X-ray measurements. The method is demonstrated with a synchrotron X-ray experiment involving in situ loading of a titanium alloy tensile specimen.
C1 [Shade, Paul A.; Schuren, Jay C.; Turner, Todd J.] US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Menasche, David B.; Suter, Robert M.] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA.
[Bernier, Joel V.] Lawrence Livermore Natl Lab, Engn Directorate, Livermore, CA 94550 USA.
[Kenesei, Peter; Park, Jun-Sang] Argonne Natl Lab, Adv Photon Source, 9700 S Cass Ave, Argonne, IL 60439 USA.
[Schuren, Jay C.] Nutonian Inc, Somerville, MA 02144 USA.
RP Shade, PA (reprint author), US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM paul.shade.1@us.af.mil
RI Shade, Paul/H-6459-2011; Suter, Robert/P-2541-2014
OI Suter, Robert/0000-0002-0651-0437
FU Materials and Manufacturing Directorate of the US Air Force Research
Laboratory; US DOE [DEAC02-06CH11357]
FX The authors thank Dr Michael Uchic (Air Force Research Laboratory) for
useful discussions regarding the fiducial marker fabrication
methodology, Dr Adam Pilchak (Air Force Research Laboratory) for
providing the Ti-7Al material, and Basil Blank (PulseRay), Ali
Mashayekhi (Advanced Photon Source) and Jon Almer (Advanced Photon
Source) for help with the experiment. The authors acknowledge support
from the Materials and Manufacturing Directorate of the US Air Force
Research Laboratory. Use of the Advanced Photon Source, an Office of
Science User Facility operated for the US Department of Energy (DOE)
Office of Science by Argonne National Laboratory, was supported by the
US DOE under contract No. DEAC02-06CH11357.
NR 26
TC 4
Z9 4
U1 2
U2 10
PU INT UNION CRYSTALLOGRAPHY
PI CHESTER
PA 2 ABBEY SQ, CHESTER, CH1 2HU, ENGLAND
SN 1600-5767
J9 J APPL CRYSTALLOGR
JI J. Appl. Crystallogr.
PD APR
PY 2016
VL 49
BP 700
EP 704
DI 10.1107/S1600576716001989
PN 2
PG 5
WC Chemistry, Multidisciplinary; Crystallography
SC Chemistry; Crystallography
GA DI7SJ
UT WOS:000373702000045
ER
PT J
AU Machida, M
Panasyuk, GY
Wang, ZM
Markel, VA
Schotland, JC
AF Machida, Manabu
Panasyuk, George Y.
Wang, Zheng-Min
Markel, Vadim A.
Schotland, John C.
TI Radiative transport and optical tomography with large datasets
SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND
VISION
LA English
DT Article
ID DIFFUSION TOMOGRAPHY; INTERNAL-REFLECTION; INVERSION FORMULAS; EQUATION;
LIGHT; SCATTERING; BOUNDARY; MEDIA; RECONSTRUCTION; SPHERE
AB We consider the inverse problem of optical tomography in the radiative transport regime. We report numerical tests of a direct reconstruction method that is suitable for use with large datasets. Reconstructions of experimental data obtained from a noncontact optical tomography system are also reported. (C) 2016 Optical Society of America
C1 [Machida, Manabu; Schotland, John C.] Univ Michigan, Dept Math, Ann Arbor, MI 48109 USA.
[Panasyuk, George Y.] Air Force Res Lab, Propuls Directorate, Wright Patterson AFB, OH 45433 USA.
[Wang, Zheng-Min] Univ Penn, Dept Bioengn, Philadelphia, PA 19104 USA.
[Markel, Vadim A.] Aix Marseille Univ, CNRS, Inst Fresnel, UMR 7249,Cent Marseille, F-130113 Marseille, France.
[Schotland, John C.] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA.
RP Schotland, JC (reprint author), Univ Michigan, Dept Math, Ann Arbor, MI 48109 USA.; Schotland, JC (reprint author), Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA.
EM schotland@umich.edu
RI Markel, Vadim/A-1029-2007
OI Markel, Vadim/0000-0002-9748-6865
FU National Institutes of Health (NIH) [P41-RR002305, R01EB004832];
National Science Foundation (NSF) [DMS-0554100, DMS-1108969]
FX National Institutes of Health (NIH) (P41-RR002305, R01EB004832);
National Science Foundation (NSF) (DMS-0554100, DMS-1108969).
NR 35
TC 2
Z9 2
U1 0
U2 5
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1084-7529
EI 1520-8532
J9 J OPT SOC AM A
JI J. Opt. Soc. Am. A-Opt. Image Sci. Vis.
PD APR 1
PY 2016
VL 33
IS 4
BP 551
EP 558
DI 10.1364/JOSAA.33.000551
PG 8
WC Optics
SC Optics
GA DI3KU
UT WOS:000373398300016
PM 27140763
ER
PT J
AU Hsu, PS
Roy, S
Zhang, Z
Sawyer, J
Slipchenko, MN
Mance, JG
Gord, JR
AF Hsu, Paul S.
Roy, Sukesh
Zhang, Zhili
Sawyer, Jordan
Slipchenko, Mikhail N.
Mance, Jason G.
Gord, James R.
TI High-repetition-rate laser ignition of fuel-air mixtures
SO OPTICS LETTERS
LA English
DT Article
ID SPARK-IGNITION; DELIVERY; FIBER
AB A laser-ignition (LI) method is presented that utilizes a high-repetition-rate (HRR) nanosecond laser to reduce minimal ignition energies of individual pulses by similar to 10 times while maintaining comparable total energies. The most common LI employs a single nanosecond-laser pulse with energies on the order of tens of millijoules to ignite combustible gaseous mixtures. Because of the requirements of high energy per pulse, fiber coupling of traditional LI systems is difficult to implement in real-world systems with limited optical access. The HRR LI method demonstrated here has an order of magnitude lower per-pulse energy requirement than the traditional single-pulse LI technique, potentially allowing delivery through standard commercial optical fibers. Additionally, the HRR LI approach significantly increases the ignition probability of lean combustible mixtures in high-speed flows while maintaining low individual pulse energies. (C) 2016 Optical Society of America
C1 [Hsu, Paul S.; Roy, Sukesh; Slipchenko, Mikhail N.; Mance, Jason G.] Spectral Energies LLC, Dayton, OH 45431 USA.
[Zhang, Zhili; Sawyer, Jordan] Univ Tennessee, Dept Mech Aerosp & Biomed Engn, Knoxville, TN 37996 USA.
[Gord, James R.] Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
RP Hsu, PS (reprint author), Spectral Energies LLC, Dayton, OH 45431 USA.
EM phsu4031@yahoo.com
FU Arnold Engineering Development Center (AEDC)
[FA9101-14-M-0011Distribution A, AEDC2015-272]; National Science
Foundation (NSF) [1418848]
FX Arnold Engineering Development Center (AEDC)
(FA9101-14-M-0011Distribution A, No. AEDC2015-272); National Science
Foundation (NSF) (1418848).
NR 25
TC 0
Z9 0
U1 1
U2 6
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0146-9592
EI 1539-4794
J9 OPT LETT
JI Opt. Lett.
PD APR 1
PY 2016
VL 41
IS 7
BP 1570
EP 1573
DI 10.1364/OL.41.001570
PG 4
WC Optics
SC Optics
GA DI0ZI
UT WOS:000373225400067
PM 27192289
ER
PT J
AU Butler, WP
Steinkraus, LW
Burlingame, EE
Fouts, BL
Serres, JL
AF Butler, William P.
Steinkraus, Lawrence W.
Burlingame, Esther E.
Fouts, Brittany L.
Serres, Jennifer L.
TI Complication Rates in Altitude Restricted Patients Following Aeromedical
Evacuation
SO AEROSPACE MEDICINE AND HUMAN PERFORMANCE
LA English
DT Article
DE cabin altitude restriction; postflight complications; aeromedical
evacuation
ID INTERSTITIAL FLUID PRESSURE; NEGATIVE-PRESSURE; PLASMA-VOLUME;
TRANSMISSION; PHYSIOLOGY; EXPOSURES; TREATISE; MEDICINE; TISSUE; FLIGHT
AB INTRODUCTION: Military aeromedical evacuation, especially that associated with the present Middle East conflict, is seeing increasing research. This ecological study initiates research into the validating flight surgeon by looking at cabin altitude restriction (CAR), arguably the validating flight surgeon's prescription with the highest patient-mission impact, and its association with postflight complications.
METHODS: CAR rates from January 2006 through February 2008 were determined from the U.S. Transportation Command Regulating and Command and Control Evacuation System database. Postflight complication rates the rate of patients with postflight complications (PFC) and the postflight complications per 100 patients (PFC-100) from January 2007 through June 2008 were calculated from the Landstuhl Regional Medical Center trauma database. CAR and complication rates were examined before, during, and after the authors' deployment. In addition, the relationship between CAR and postflight complication rates was investigated; as the rates were nonlinear, a Spearman correlation was performed.
RESULTS: CAR rates during the authors' deployments were significantly up compared to the authors' predecessors or successors; their predecessors and successors did not differ statistically. Likewise, the PFC rate during the authors' deployments was significantly lower than that of the before or after time frames. Furthermore, a statistically significant inverse relationship between CAR and PFC rates (Spearman rho = -0.587) as well as CAR and PFC-100 rates (Spearman rho = -0.568) was demonstrated.
DISCUSSION: CAR rate was inversely correlated to PFC and PFC-100 rates. This finding suggests that aggressive prescribing of CARs may have a salutary effect on postflight complication rates and bears further investigation.
C1 [Butler, William P.; Steinkraus, Lawrence W.; Burlingame, Esther E.; Fouts, Brittany L.; Serres, Jennifer L.] US Air Force, Sch Aerosp Med, Wright Patterson AFB, OH 45433 USA.
RP Butler, WP (reprint author), 732 Okuma Dr, Chester, VA 23836 USA.
EM sumokokeshi@gmail.com
NR 35
TC 0
Z9 0
U1 0
U2 2
PU AEROSPACE MEDICAL ASSOC
PI ALEXANDRIA
PA 320 S HENRY ST, ALEXANDRIA, VA 22314-3579 USA
SN 2375-6314
EI 2375-6322
J9 AEROSP MED HUM PERF
JI Aerosp. Med.Hum. Perform.
PD APR
PY 2016
VL 87
IS 4
BP 352
EP 359
DI 10.3357/AMHP.4378.2016
PG 8
WC Biophysics; Public, Environmental & Occupational Health; Medicine,
Research & Experimental
SC Biophysics; Public, Environmental & Occupational Health; Research &
Experimental Medicine
GA DH4RA
UT WOS:000372771900001
PM 27026118
ER
PT J
AU Ibey, BL
Roth, CC
Ledwig, PB
Payne, JA
Amato, AL
Dalzell, DR
Bernhard, JA
Doroski, MW
Mylacraine, KS
Seaman, RL
Nelson, GS
Woods, CW
AF Ibey, Bennett L.
Roth, Caleb C.
Ledwig, Patrick B.
Payne, Jason A.
Amato, Alayna L.
Dalzell, Danielle R.
Bernhard, Joshua A.
Doroski, Michael W.
Mylacraine, Kevin S.
Seaman, Ronald L.
Nelson, Gregory S.
Woods, Clifford W.
TI Cellular effects of acute exposure to high peak power microwave systems:
Morphology and toxicology
SO BIOELECTROMAGNETICS
LA English
DT Article
DE electroportation; Jurkat; electromagnetic pulse; bioeffects; standards
ID ISOLATED HEART FUNCTION; ELECTROMAGNETIC PULSE; RADIATION
AB Electric fields produced by advanced pulsed microwave transmitter technology now readily exceed the Institute of Electrical and Electronic Engineers (IEEE) C.95.1 peak E-field limit of 100kV/m, highlighting a need for scientific validation of such a specific limit. Toward this goal, we exposed Jurkat Clone E-6 human lymphocyte preparations to 20 high peak power microwave (HPPM) pulses (120ns duration) with a mean peak amplitude of 2.3MV/m and standard deviation of 0.1 with the electric field at cells predicted to range from 0.46 to 2.7MV/m, well in excess of current standard limit. We observed that membrane integrity and cell morphology remained unchanged 4h after exposure and cell survival 24h after exposure was not statistically different from sham exposure or control samples. Using flow cytometry to analyze membrane disruption and morphological changes per exposed cell, no changes were observed in HPPM-exposed samples. Current IEEE C95.1-2005 standards for pulsed radiofrequency exposure limits peak electric field to 100kV/m for pulses shorter than 100ms [IEEE (1995) PC95.1Standard for Safety Levels with Respect to Human Exposure to Electric, Magnetic and Electromagnetic Fields, 0 Hz to 300 GHz, Institute of Electrical and Electronic Engineers: Piscataway, NJ, USA]. This may impose large exclusion zones that limit HPPM technology use. In this study, we offer evidence that maximum permissible exposure of 100kV/m for peak electric field may be unnecessarily restrictive for HPPM devices. Bioelectromagnetics. 37:141-151, 2016. (c) 2016 Wiley Periodicals, Inc.
C1 [Ibey, Bennett L.; Payne, Jason A.; Amato, Alayna L.; Dalzell, Danielle R.; Bernhard, Joshua A.; Doroski, Michael W.] US Air Force, Res Lab, Human Effectiveness Directorate,Joint Base San An, Radio Frequency Bioeffects Branch,Bioeffects Div, 711th Human Performance Wing, Ft Sam Houston, TX 78234 USA.
[Roth, Caleb C.; Ledwig, Patrick B.; Mylacraine, Kevin S.; Seaman, Ronald L.] Joint Base San Antonio, Gen Dynam Informat Technol, Ft Sam Houston, TX USA.
[Nelson, Gregory S.; Woods, Clifford W.] Kirtland Air Force Base, Directed Energy Div, High Power Microwave Applicat Branch, Kirtland AFB, NM USA.
RP Ibey, BL (reprint author), US Air Force, Res Lab, Human Effectiveness Directorate,Joint Base San An, Radio Frequency Bioeffects Branch,Bioeffects Div, 711th Human Performance Wing, Ft Sam Houston, TX 78234 USA.
EM bennett.ibey@us.af.mil
FU Joint Nonlethal Weapons Directorate. The 711 Human Performance Wing, Air
Force Research Laboratory
FX Grant sponsors: The Joint Nonlethal Weapons Directorate. The 711 Human
Performance Wing, Air Force Research Laboratory.
NR 26
TC 0
Z9 0
U1 3
U2 3
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0197-8462
EI 1521-186X
J9 BIOELECTROMAGNETICS
JI Bioelectromagnetics
PD APR
PY 2016
VL 37
IS 3
BP 141
EP 151
DI 10.1002/bem.21962
PG 11
WC Biology; Biophysics
SC Life Sciences & Biomedicine - Other Topics; Biophysics
GA DH9OC
UT WOS:000373124500001
ER
PT J
AU Ma, L
Wu, Y
Lei, QC
Xu, WJ
Carter, CD
AF Ma, Lin
Wu, Yue
Lei, Qingchun
Xu, Wenjiang
Carter, Campbell D.
TI 3D flame topography and curvature measurements at 5 kHz on a premixed
turbulent Bunsen flame
SO COMBUSTION AND FLAME
LA English
DT Article
DE Tomography; Chemiluminesecence; 3D measurement; Turbulent combustion
ID LASER-INDUCED FLUORESCENCE; FIBER-BASED ENDOSCOPES; HYPERSPECTRAL
TOMOGRAPHY; COMPUTED-TOMOGRAPHY; BURNING VELOCITIES; REPETITION-RATE;
REACTIVE FLOWS; COMBUSTION; CHEMILUMINESCENCE; TEMPERATURE
AB This work reports the measurements of three-dimensional (3D) flame topography and curvature of a premixed turbulent Bunsen flame at a rate of 5 kHz, using a technique combining chemiluminescence and tomography. Line-of-sight images of chemiluminescence (termed projections) of the target flame were recorded by six cameras from different orientations simultaneously at 5 kHz. Based on these projections, a tomography algorithm reconstructed the 3D flame structure, based on which 3D curvature was then calculated. Due to the 3D nature of the data, statistics of flame properties can then be extracted both in temporal and spatial domains. Probability density function (PDF) of flame topography was extracted from a series of 3D measurements, and the PDFs of the flame at different spatial locations were examined. Furthermore, the instantaneously measured 3D flame topography also enabled the calculation of 3D flame curvature (or 2D curvature along an arbitrary orientation). The PDFs of curvature in 2D and 3D were then extracted and compared. These results provide quantification of the flame surface shape in 3D (cylindrical, elliptic, or hyperbolic), illustrating the utility of 3D diagnostics to fully resolve the dynamics of turbulent flames. (C) 2016 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
C1 [Ma, Lin; Wu, Yue; Xu, Wenjiang] Virginia Tech, Dept Aerosp & Ocean Engn, Blacksburg, VA 24060 USA.
[Ma, Lin; Lei, Qingchun] Virginia Tech, Dept Mech Engn, Blacksburg, VA 24060 USA.
[Carter, Campbell D.] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Ma, L (reprint author), Virginia Tech, Laser Diagnost Lab, Dept Aerosp Ocean Engn, Room 660A Mcbryde Hall, Blacksburg, VA 24060 USA.
EM Linma@vt.edu
FU U.S. Air Force Office of Scientific Research (AFOSR) [FA9550-14-1-0386];
NSF [CBET 1156564]
FX This work is supported by the U.S. Air Force Office of Scientific
Research (AFOSR) under grant FA9550-14-1-0386 with Dr. Chiping Li as the
technical monitor. Development of the imaging processing and analysis
algorithms used here was supported by an NSF award (award CBET 1156564).
Lin Ma is also grateful for a 2014 U.S. Air Force Summer Faculty
Fellowship.
NR 49
TC 0
Z9 0
U1 2
U2 7
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0010-2180
EI 1556-2921
J9 COMBUST FLAME
JI Combust. Flame
PD APR
PY 2016
VL 166
BP 66
EP 75
DI 10.1016/j.combustflame.2015.12.031
PG 10
WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary;
Engineering, Chemical; Engineering, Mechanical
SC Thermodynamics; Energy & Fuels; Engineering
GA DH4PQ
UT WOS:000372768300006
ER
PT J
AU Jones, AR
Medina, A
Spooner, H
Mulleners, K
AF Jones, Anya R.
Medina, Albert
Spooner, Hannah
Mulleners, Karen
TI Characterizing a burst leading-edge vortex on a rotating flat plate wing
SO EXPERIMENTS IN FLUIDS
LA English
DT Article
ID PARTICLE IMAGE VELOCIMETRY; VELOCITY-FIELD; FLOW STRUCTURE; VORTICES;
DYNAMICS; HELICITY; RECONSTRUCTION; IDENTIFICATION; TRANSPORT; FLIGHT
AB Identifying, characterizing, and tracking incoherent vortices in highly separated flows is of interest for the development of new low-order models for unsteady lift prediction. The current work examines several methods to identify vortex burst and characterize a burst leading-edge vortex. Time-resolved stereoscopic PIV was performed on a rotating flat plate wing at Re = 2500. The burst process was found to occur at mid-span and is characterized by axial flow reversal, the entrainment of opposite-sign vorticity, and a rapid expansion of vortex size. A POD analysis revealed that variations in certain mode coefficients are indicative of the flow state changes characteristics of burst. During burst, the leading-edge vortex evolves to a region of inhomogeneous vorticity distributed over a large area. Several methods of defining the vortex size and circulation are evaluated and a combination of these can be used to characterize the leading-edge vortex both pre- and post-burst.
C1 [Jones, Anya R.; Spooner, Hannah; Mulleners, Karen] Univ Maryland, Dept Aerosp Engn, College Pk, MD 20742 USA.
[Medina, Albert] US Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Spooner, Hannah] Cessna Aircraft Co, Wichita, KS USA.
[Mulleners, Karen] Ecole Polytech Fed Lausanne, Inst Engn Mech, Lausanne, Switzerland.
RP Jones, AR (reprint author), Univ Maryland, Dept Aerosp Engn, College Pk, MD 20742 USA.
EM arjones@umd.edu; karen.mulleners@epfl.ch
FU U.S. Air Force Office of Scientific Research under AFOSR Award
[FA9550-12-1-0251]; Science Education Programs at Oak Ridge National
Laboratory
FX This work was supported in part by the U.S. Air Force Office of
Scientific Research under AFOSR Award No. FA9550-12-1-0251 (Jones) and
an appointment to the Science Education Programs at Oak Ridge National
Laboratory, administered by ORAU through the U.S. Department of Energy
Oak Ridge Institute for Science and Education (Medina).
NR 43
TC 1
Z9 1
U1 2
U2 4
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0723-4864
EI 1432-1114
J9 EXP FLUIDS
JI Exp. Fluids
PD APR
PY 2016
VL 57
IS 4
AR 52
DI 10.1007/s00348-016-2143-7
PG 16
WC Engineering, Mechanical; Mechanics
SC Engineering; Mechanics
GA DH5XQ
UT WOS:000372866000008
ER
PT J
AU Keller, AT
Regan, LA
Lundstrom, CC
Bower, NW
AF Keller, Austin T.
Regan, Laura A.
Lundstrom, Craig C.
Bower, Nathan W.
TI Evaluation of the efficacy of spatiotemporal Pb isoscapes for
provenancing of human remains
SO FORENSIC SCIENCE INTERNATIONAL
LA English
DT Article
DE Forensic science; Anthropology; Radiogenic; Stable isotope;
Pb-206/Pb-207; Isoscape
ID STABLE-ISOTOPE RATIOS; HUMAN LEAD-EXPOSURE; FORENSIC-SCIENCE;
LAKE-SEDIMENTS; UNITED-STATES; RECORD; DEPOSITION; CARBONATE; CHILDREN;
TEETH
AB Geospatially distributed isotopes (isoscapes) from biogeochemically fractionated processes have been applied in many forensic investigations, such as authentication of food and sourcing of drugs. Provenancing of human remains using isotopes has been hindered by a lack of appropriate isoscapes, by changes in these isoscapes over time, and by various homogenization processes. In this study we create spatiotemporal isoscapes for anthropogenic lead (Pb) for the contiguous United States and Europe using literature data from dated sediments, soils and biological tissues. We compare Pb-206/Pb-207 isoscapes with isoscapes of delta C-13, delta O-18 and Sr-87/Sr-86 to determine their relative efficacy for the forensic identification of human remains. We do this comparison using third molar enamel data from 22 United States Air Force Academy cadets with known life trajectories born between 1983 and 1985. We use these spatiotemporal isoscapes with osteologic analyses, hospital records and isotopic analyses of tooth enamel carbonate from permanent teeth to help identify 32 individuals from unmarked graves found in a forgotten 19th century mental asylum cemetery. (C) 2016 Elsevier Ireland Ltd. All rights reserved.
C1 [Keller, Austin T.; Bower, Nathan W.] Colorado Coll, Dept Chem & Biochem, 14 E Cache La Poudre, Colorado Springs, CO 80903 USA.
[Regan, Laura A.] US Air Force Acad, Dept Biol, 2355 Fac Dr,Suite 2P389, Colorado Springs, CO 80840 USA.
[Lundstrom, Craig C.] Univ Illinois, Dept Geol, 605 E Springfield,MC 235, Champaign, IL 61820 USA.
RP Bower, NW (reprint author), Colorado Coll, Dept Chem & Biochem, 14 E Cache La Poudre, Colorado Springs, CO 80903 USA.
EM austin474@gmail.com; Laura.Regan@usafa.edu; lundstro@illinois.edu;
nbower@coloradocollege.edu
FU Otis and Margaret Barnes Trust; Bourquin Family, Edith Gaylord and
Jackson Fellowship Funds
FX We dedicate this paper to the memory of J. Michael Hoffman (1944-2012).
He provided the samples of the CMHIP teeth and the osteological analyses
used in this study. We thank Terrie Sajbel (CMHIP) for access to the
19th century hospital records, Steve Burt for help with constructing
equipment, Steven Janke and Fred Tinsley for helpful discussion of the
statistics, and Matt Gottfried and Beth Scaffidi for running the Arc-GIS
and SAGA-GIS isoscape models. We are also grateful for funding from the
Otis and Margaret Barnes Trust, the Bourquin Family, Edith Gaylord and
Jackson Fellowship Funds, and for a 2009 Merck/AAAS Undergraduate
Science Research Program grant.
NR 64
TC 0
Z9 0
U1 4
U2 10
PU ELSEVIER IRELAND LTD
PI CLARE
PA ELSEVIER HOUSE, BROOKVALE PLAZA, EAST PARK SHANNON, CO, CLARE, 00000,
IRELAND
SN 0379-0738
EI 1872-6283
J9 FORENSIC SCI INT
JI Forensic Sci.Int.
PD APR
PY 2016
VL 261
BP 83
EP 92
DI 10.1016/j.forsciint.2016.02.006
PG 10
WC Medicine, Legal
SC Legal Medicine
GA DH6NR
UT WOS:000372907900018
PM 26914828
ER
PT J
AU Hilton, AM
Heller, ER
Dorsey, DL
AF Hilton, Albert M.
Heller, Eric R.
Dorsey, Donald L.
TI Electroluminescence Microscopy of Cross-Sectioned AlGaN/GaN
High-Electron Mobility Transistors
SO IEEE TRANSACTIONS ON ELECTRON DEVICES
LA English
DT Article
DE AlGaN; electrical stress; electroluminescence (EL); GaN device modeling;
high-electron mobility transistor (HEMT); hot electrons; reliability
ID RAMAN-SPECTROSCOPY; RELIABILITY; TEMPERATURE; DEGRADATION; HEMTS; HFETS;
GAN; TRANSPORT; TRAPS
AB We report an electroluminescence (EL) microscopy study of operating cross-sectioned AlGaN/GaN high-electron mobility transistors. By examining devices in a cross-sectional view, the distribution and intensity of photons emitted from underneath the optically opaque metal of the gate and drain structures can be studied. The location and the shape of EL bright spots were quantitatively compared with simulated device behavior, revealing a strong correlation between the measured EL intensity and the expected distribution of hot electrons in the channel. Under constant low-power conditions, the bulk of the EL signal migrates from the drain edge of the gate field plate to the drain edge of the source-connected field plate (SCFP) as the drain bias is increased. Hot electrons have been cited as a dominant contributor to device degradation for some devices, so quantifying their location and bias dependence is critical to understanding how this degradation rate might scale with bias and device design. In addition, devices both with and without an SCFP were imaged to quantitatively investigate the influence of the field plate on the EL signal. Finally, a measurement of the spectra of EL signals is used to estimate the temperature of hot electrons in the device.
C1 [Hilton, Albert M.] Wyle Aerosp Grp, Dayton, OH 45431 USA.
[Heller, Eric R.; Dorsey, Donald L.] US Air Force, Mat Mfg Directorate, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Hilton, AM (reprint author), Wyle Aerosp Grp, Dayton, OH 45431 USA.
EM albert.hilton.ctr@wpafb.af.mil; eric.heller.2@us.af.mil;
donald.dorsey@us.af.mil
FU Air Force Office of Scientific Research; Air Force Research Laboratory's
High Reliability Electronics Virtual Center
FX This work was supported by the Air Force Office of Scientific Research
(Program Officer Dr. M. Kendra) and in collaboration with the Air Force
Research Laboratory's High Reliability Electronics Virtual Center. The
review of this paper was arranged by Editor S. Bandyopadhyay.
NR 22
TC 2
Z9 2
U1 5
U2 20
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9383
EI 1557-9646
J9 IEEE T ELECTRON DEV
JI IEEE Trans. Electron Devices
PD APR
PY 2016
VL 63
IS 4
BP 1459
EP 1463
DI 10.1109/TED.2016.2532475
PG 5
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA DH8RL
UT WOS:000373063800009
ER
PT J
AU Payne, BC
Bredthauer, JS
Martin, JA
Merrell, JC
AF Payne, Brian C.
Bredthauer, Jeffery S.
Martin, John A.
Merrell, Jeffrey C.
TI Minding the Terrazzo Gap between Athletes and Nonathletes:
Representativeness, Integration, and Academic Performance at the US Air
Force Academy
SO JOURNAL OF SPORTS ECONOMICS
LA English
DT Article
DE sports economics; academic performance; student-athletes;
representativeness; athletic integration
ID QUALITY; SUCCESS; IMPACT
AB The tension between focusing on collegiate athletic or academic performance has persisted for decades. A recent study finds that recruited athletes in college athletic programs underperform academically, earning lower grades than predicted. It postulates that increased representativeness and integration efforts will enhance the academic value of college athletes' experience. The U.S. Air Force Academy system presents a natural experiment of whether such efforts can affect student-athlete academic performance. In this setting, we find that student-athletes perform comparably to nonathletes after controlling for predicted academic performance.
C1 [Payne, Brian C.; Martin, John A.] US Air Force Acad, Management, Colorado Springs, CO 80840 USA.
[Merrell, Jeffrey C.] US Air Force Acad, Finance & Accounting, Colorado Springs, CO 80840 USA.
[Bredthauer, Jeffery S.] Univ Nebraska, Finance, Omaha, NE 68182 USA.
RP Payne, BC (reprint author), US Air Force Acad, HQ USAFA DFM, Colorado Springs, CO 80840 USA.
EM brian.payne@usafa.edu
NR 16
TC 0
Z9 0
U1 2
U2 4
PU SAGE PUBLICATIONS INC
PI THOUSAND OAKS
PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 USA
SN 1527-0025
EI 1552-7794
J9 J SPORT ECON
JI J. Sport. Econ.
PD APR
PY 2016
VL 17
IS 3
BP 302
EP 320
DI 10.1177/1527002514530406
PG 19
WC Economics; Hospitality, Leisure, Sport & Tourism
SC Business & Economics; Social Sciences - Other Topics
GA DH6KH
UT WOS:000372898900005
ER
PT J
AU Miller, ME
Gilman, JM
Colombi, JM
AF Miller, M. E.
Gilman, J. M.
Colombi, J. M.
TI A model for a two-source illuminant allowing daylight colour adjustment
SO LIGHTING RESEARCH & TECHNOLOGY
LA English
DT Article
ID LIGHT-EMITTING-DIODES; PERFORMANCE
AB A model is presented which determines the optimal placement of narrow-band emitters in a pair of light sources, where the correlated colour temperature (CCT) of the illumination is controlled by varying the relative intensity of the light sources. This model was exercised to determine optimally-placed 30nm and 60nm bandwidth emitters across the target range of CCTs. The results suggest that a lamp capable of high Colour Rendering Index values with respect to daylight illumination across CCT values between 4000K and 10000K can be formed from as few as three independently-selected 30 or 60nm bandwidth emitters within each source. However, when the model is constrained to require the same emitters in both light sources, adequate colour rendering requires at least four 30nm or three 60nm bandwidth emitters.
C1 [Miller, M. E.; Gilman, J. M.; Colombi, J. M.] US Air Force, Inst Technol, Dept Syst Engn & Management, 2950 Hobson Way AFIT ENV, Wright Patterson AFB, OH 45433 USA.
RP Miller, ME (reprint author), US Air Force, Inst Technol, Dept Syst Engn & Management, 2950 Hobson Way AFIT ENV, Wright Patterson AFB, OH 45433 USA.
EM Michael.miller@afit.edu
NR 26
TC 0
Z9 0
U1 1
U2 1
PU SAGE PUBLICATIONS LTD
PI LONDON
PA 1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLAND
SN 1477-1535
EI 1477-0938
J9 LIGHTING RES TECHNOL
JI Lighting Res. Technol.
PD APR
PY 2016
VL 48
IS 2
BP 239
EP 252
DI 10.1177/1477153514559796
PG 14
WC Construction & Building Technology; Optics
SC Construction & Building Technology; Optics
GA DH8LO
UT WOS:000373044900010
ER
PT J
AU Stephens, J
Fierro, A
Beeson, S
Laity, G
Trienekens, D
Joshi, RP
Dickens, J
Neuber, A
AF Stephens, J.
Fierro, A.
Beeson, S.
Laity, G.
Trienekens, D.
Joshi, R. P.
Dickens, J.
Neuber, A.
TI Photoionization capable, extreme and vacuum ultraviolet emission in
developing low temperature plasmas in air
SO PLASMA SOURCES SCIENCE & TECHNOLOGY
LA English
DT Article
DE low temperature plasma; streamer; photoionization; spectroscopy; VUV;
EUV; breakdown
ID DIELECTRIC SURFACE FLASHOVER; ELECTRON-IMPACT; CROSS-SECTIONS;
ATMOSPHERIC CONDITIONS; STREAMER PROPAGATION; OSCILLATOR-STRENGTH;
WAVELENGTH REGION; MEDIUM-RESOLUTION; N-2; ABSORPTION
AB Experimental observation of photoionization capable extreme ultraviolet and vacuum ultraviolet emission from nanosecond timescale, developing low temperature plasmas (i.e. streamer discharges) in atmospheric air is presented. Applying short high voltage pulses enabled the observation of the onset of plasma formation exclusively by removing the external excitation before spark development was achieved. Contrary to the common assumption that radiative transitions from the b(1)Pi(u) (Birge-Hopfield I) and b'(1)Sigma(+)(u) (Birge-Hopfield II) singlet states of N-2 are the primary contributors to photoionization events, these results indicate that radiative transitions from the c'(1)(4)Sigma(+)(u) (Carroll-Yoshino) singlet state of N-2 are dominant in developing low temperature plasmas in air. In addition to c'(4) transitions, photoionization capable transitions from atomic and singly ionized atomic oxygen were also observed. The inclusion of c'(1)(4)Sigma(+)(u) transitions into a statistical photoionization model coupled with a fluid model enabled streamer growth in the simulation of positive streamers.
C1 [Stephens, J.; Fierro, A.; Beeson, S.; Laity, G.; Trienekens, D.; Joshi, R. P.; Dickens, J.; Neuber, A.] Texas Tech Univ, Ctr Pulsed Power & Power Elect, Lubbock, TX 79407 USA.
[Fierro, A.; Laity, G.] Sandia Natl Labs, Albuquerque, NM 87123 USA.
[Beeson, S.] Air Force Res Lab, Kirtland AFB, NM 87117 USA.
[Trienekens, D.] Eindhoven Univ Technol, Elementary Proc Gas Discharges, POB 513, NL-5600 MB Eindhoven, Netherlands.
RP Neuber, A (reprint author), Texas Tech Univ, Ctr Pulsed Power & Power Elect, Lubbock, TX 79407 USA.
EM andreas.neuber@ttu.edu
RI Dickens, James/H-5993-2016
FU AT&T Professorship in ECE at Texas Tech University; SMART scholarship;
Dutch Technology Foundation STW [12119]
FX This work was partially funded by the AT&T Professorship in ECE at Texas
Tech University. Author (S.B.) was supported by the SMART scholarship
and author (DT) was supported by project 12119 of the Dutch Technology
Foundation STW.
NR 81
TC 0
Z9 0
U1 3
U2 8
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0963-0252
EI 1361-6595
J9 PLASMA SOURCES SCI T
JI Plasma Sources Sci. Technol.
PD APR
PY 2016
VL 25
IS 2
AR 025024
DI 10.1088/0963-0252/25/2/025024
PG 11
WC Physics, Fluids & Plasmas
SC Physics
GA DG8MI
UT WOS:000372337900026
ER
PT J
AU Riley, J
Gambone, MD
AF Riley, John
Gambone, Michael D.
TI Old Wounds, New Warriors: The Problem of Contractor Medical Care during
and after Contemporary American Contingency Operations
SO ARMED FORCES & SOCIETY
LA English
DT Article
DE private contractors; health care; injuries; reform
AB American overseas military operations have become dependent upon private contractors. Thousands of these individuals have suffered casualties as a consequence of employment in high-risk parts of the world. American policy has consistently failed to meet the medical needs of hundreds of thousands of contractors. The root source of this problem is the nature of contracting itself. It is a system defined by a commercial transaction rather than the common bond shared between a citizen and the state. The current and future of costs of this basic disconnect are significant. Contractor casualties have risen at exponential rates. More broadly, policy makers must also confront the state's obligations to employees who are assuming the risks of outsourced citizenship, a question that pertains to American contractors returning home as well as the vast majority of local national workers left to their own devices once Washington declares its mission complete.
C1 [Riley, John] US Air Force Acad, Dept Polit Sci, Colorado Springs, CO 80840 USA.
[Gambone, Michael D.] Kutztown Univ Penns, Dept Hist, Reading, PA 19512 USA.
RP Gambone, MD (reprint author), Kutztown Univ Penns, Dept Hist, Reading, PA 19512 USA.
EM gambone@kutztown.edu
NR 57
TC 0
Z9 0
U1 1
U2 2
PU SAGE PUBLICATIONS INC
PI THOUSAND OAKS
PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 USA
SN 0095-327X
EI 1556-0848
J9 ARMED FORCES SOC
JI Armed Forces Soc.
PD APR
PY 2016
VL 42
IS 2
BP 344
EP 361
DI 10.1177/0095327X15590387
PG 18
WC Political Science; Sociology
SC Government & Law; Sociology
GA DF4GZ
UT WOS:000371307300005
ER
PT J
AU Butcher, DP
Wadams, RC
Drummy, L
Koerner, H
Bailey, C
Scheltens, F
Mccomb, D
Fabris, L
Durstock, MF
Tabor, C
AF Butcher, Dennis P., Jr.
Wadams, Robert C.
Drummy, Lawrence
Koerner, Hilmar
Bailey, Chris
Scheltens, Frank
Mccomb, David
Fabris, Laura
Durstock, Michael F.
Tabor, Christopher
TI Controlled Dispersion of Polystyrene-Capped Au Nanoparticles in
P3HT:PC61BM and Consequences upon Active Layer Nanostructure
SO JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
LA English
DT Article
DE bulk heterojunction; composite; localized surface plasmon resonance;
nanoparticles; nanostructure; organic photovoltaic; plasmonic
enhancement; self-assembly
ID ORGANIC SOLAR-CELLS; HETEROJUNCTION PHOTOVOLTAIC DEVICES; GOLD NANORODS;
MORPHOLOGY CONTROL; GRAPHENE OXIDES; POLYMER; PERFORMANCE; ENHANCEMENT;
EFFICIENCY; STABILITY
AB Numerous recent publications detail higher absorption and photovoltaic performance within organic photovoltaic (OPV) devices which are loaded with Au or Ag nanoparticles to leverage the light management properties of the localized surface plasmon resonance (LSPR). This report details the impact upon film morphology and polymer/nanoparticle interactions caused by incorporation of polystyrene-coated Au nanoparticles (Au/PS) into the P3HT:PC61BM bulk heterojunction film. Nanostructural analysis by transmission electron microscopy and X-ray scattering reveals tunable Au/PS particle assembly that depends upon the choice of casting solvent, polymer chain length, film drying time, and Au/PS particle loading density. This Au/PS particle assembly has implications on the spectral position of the Au nanoparticle LSPR, which shifts from 535 nm for individually dispersed particles in toluene to 650 nm for particles arranged in large clusters within the P3HT: PC61BM matrix. These results suggest a critical impact from PS/P3HT phase separation, which causes controlled assembly of a separate Au/PS phase in the nanoparticle/OPV composite; controlled Au/PS phase formation provides a blueprint for designing AuNP/OPV hybrid films that impart tunable optical behavior and potentially improve photovoltaic performance. (C) 2015 Wiley Periodicals, Inc.
C1 [Butcher, Dennis P., Jr.; Drummy, Lawrence; Koerner, Hilmar; Bailey, Chris; Durstock, Michael F.; Tabor, Christopher] Air Force Res Lab, 3005 Hobson Way, Wright Patterson AFB, OH USA.
[Wadams, Robert C.] Rutgers State Univ, Dept Mat Sci & Engn, Nanotechnol Clean Energy IGERT, 607 Taylor Rd, Piscataway, NJ 08854 USA.
[Scheltens, Frank; Mccomb, David] Ohio State Univ, Ctr Electron Microscopy & Anal CEMAS, 1305 Kinnear Rd, Columbus, OH 43212 USA.
[Fabris, Laura] Rutgers State Univ, Inst Adv Mat Devices & Nanotechnol, 607 Taylor Rd, Piscataway, NJ 08854 USA.
RP Tabor, C (reprint author), Air Force Res Lab, 3005 Hobson Way, Wright Patterson AFB, OH USA.
EM christopher.tabor.1@us.af.mil
FU National Science Foundation [0903661]
FX We thank Alexander Hexemer and Eric Schaible for guidance, setup, and
data collection at beamline 7.3.3 at ALS/LBNL. R. C. Wadams acknowledges
the National Science Foundation Grant 0903661 ("Nanotechnology for Clean
Energy IGERT").
NR 79
TC 0
Z9 0
U1 3
U2 39
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0887-6266
EI 1099-0488
J9 J POLYM SCI POL PHYS
JI J. Polym. Sci. Pt. B-Polym. Phys.
PD APR 1
PY 2016
VL 54
IS 7
BP 709
EP 720
DI 10.1002/polb.23962
PG 12
WC Polymer Science
SC Polymer Science
GA DF6UQ
UT WOS:000371492800002
ER
PT J
AU Cheng, HN
Chung, SM
AF Cheng, Huaining
Chung, Soon M.
TI Orthogonal moment-based descriptors for pose shape query on 3D point
cloud patches
SO PATTERN RECOGNITION
LA English
DT Article
DE 3D shape descriptor; Tchebichef moment; Fourier transform; Wavelet
transform; Point cloud; LIDAR; 3D shape reconstruction; 3D shape
retrieval
ID INVARIANT PATTERN-RECOGNITION; IMAGE-ANALYSIS; OBJECT RECOGNITION;
RETRIEVAL; SURFACES
AB When 3D sensors such as Light Detection and Ranging (LIDAR) are employed in targeting and recognition of human actions from both ground and aerial platforms, the corresponding point clouds of body shape often comprise low-resolution, disjoint, and irregular patches of points resulted from self-occlusions and viewing angle variations. Many existing 3D shape descriptors designed for shape query and retrieval cannot work effectively with these degenerated point clouds because of their dependency on dense and smooth full-body scans. In this paper, a new degeneracy-tolerable, multi-scale 3D shape descriptor based on the discrete orthogonal Tchebichef moment is proposed as an alternative for single-view partial point cloud representation and characterization. To evaluate the effectiveness of our descriptor, named Tchebichef moment shape descriptor (TMSD), in human shape retrieval, we built a multi-subject pose shape baseline to produce simulated LIDAR captures at different viewing angles and conducted experiments of nearest neighbor search and point cloud reconstruction. The query results show that TMSD performs significantly better than the Fourier descriptor and is slightly better than the wavelet descriptor but more flexible to construct. In addition, we proposed a voxelization scheme that can achieve translation, scale, and resolution invariance, which may be less of a concern in the traditional full-body shape analysis but are crucial requirements for meaningful partial point cloud retrievals. (C) 2015 Elsevier Ltd. All rights reserved.
C1 [Cheng, Huaining; Chung, Soon M.] Air Force Res Lab, Human Effectiveness Directorate, Wright Patterson AFB, OH 45433 USA.
Wright State Univ, Dept Comp Sci & Engn, Dayton, OH 45435 USA.
RP Chung, SM (reprint author), Air Force Res Lab, Human Effectiveness Directorate, Wright Patterson AFB, OH 45433 USA.
EM huaining.cheng@wpafb.af.mil; soon.chung@wright.edu
NR 45
TC 0
Z9 0
U1 8
U2 31
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0031-3203
EI 1873-5142
J9 PATTERN RECOGN
JI Pattern Recognit.
PD APR
PY 2016
VL 52
BP 397
EP 409
DI 10.1016/j.patcog.2015.09.028
PG 13
WC Computer Science, Artificial Intelligence; Engineering, Electrical &
Electronic
SC Computer Science; Engineering
GA DB8CK
UT WOS:000368744300029
ER
PT J
AU Bak, MS
McGann, B
Carter, C
Do, H
AF Bak, Moon Soo
McGann, Brendan
Carter, Campbell
Do, Hyungrok
TI Determinants of laser-induced breakdown spectra in N-2-O-2 mixtures
SO JOURNAL OF PHYSICS D-APPLIED PHYSICS
LA English
DT Article
DE laser-induced breakdown; emission spectroscopy; plasma temperature;
laser-induced breakdown spectroscopy
ID SPECTROSCOPY; AIR; DENSITY; GASES; SPARK
AB Potential determinants of the laser-induced breakdown spectra in N-2-O-2 mixtures are investigated with varying species concentration, laser energy, and exposure time (equal to the detector's intensifier gate time). A focused laser beam with pulse energy 29 mJ, 38 mJ, or 46 mJ generates the breakdown plasma in a N-2 mixture containing O-2 from 0% to 21% in mole fraction. Time-resolved measurements of the breakdown emission spectra with 2 or 10 ns exposure are carried out beginning from the arrival of the laser beam at the focal point up to several mu s later. These measurements show the temporal evolution of the instantaneous spectrum in the range 550-825 nm that contains multiple N and O atomic/ionic emission lines. Analyses of the baseline-subtracted spectra, normalized by the peak intensity of the N atomic emission line at 747 nm, indicate that the temporal evolution of each emission line is independent of species concentration and laser energy, though the instantaneous emission line intensity is strongly dependent on the species concentration and exposure time. The plasma temperature, estimated using two atomic oxygen lines and assuming local thermal equilibrium, and its temporal evolution are shown to be independent of the species concentration and a weak function of the laser energy at a given gas density, e.g. atmospheric pressure and room temperature. In addition, thermal equilibrium calculations, for predicting atomic and ionic species concentrations in the plasma, are carried out, and the combined results dictate that the emission-line intensity is linear with the atomic/ionic species concentration because of the consistent plasma temperature and its temporal evolution, independent of species concentration.
C1 [Bak, Moon Soo] Sungkyunkwan Univ, Sch Mech Engn, Suwon, Gyeonggi Do, South Korea.
[McGann, Brendan] Univ Notre Dame, Dept Aerosp & Mech Engn, Notre Dame, IN 46556 USA.
[Carter, Campbell] Air Force Res Lab, Wright Patterson AFB, OH USA.
[Do, Hyungrok] Seoul Natl Univ, Dept Mech & Aerosp Engn, Seoul, South Korea.
RP Do, H (reprint author), Seoul Natl Univ, Dept Mech & Aerosp Engn, Seoul, South Korea.
EM hyungrok@snu.ac.kr
NR 21
TC 0
Z9 0
U1 6
U2 12
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0022-3727
EI 1361-6463
J9 J PHYS D APPL PHYS
JI J. Phys. D-Appl. Phys.
PD MAR 31
PY 2016
VL 49
IS 12
AR 125202
DI 10.1088/0022-3727/49/12/125202
PG 10
WC Physics, Applied
SC Physics
GA DF0QJ
UT WOS:000371043700014
ER
PT J
AU Samant, SP
Grabowski, CA
Kisslinger, K
Yager, KG
Yuan, GC
Satija, SK
Durstock, MF
Raghavan, D
Karim, A
AF Samant, Saumil P.
Grabowski, Christopher A.
Kisslinger, Kim
Yager, Kevin G.
Yuan, Guangcui
Satija, Sushil K.
Durstock, Michael F.
Raghavan, Dharmaraj
Karim, Alamgir
TI Directed Self-Assembly of Block Copolymers for High Breakdown Strength
Polymer Film Capacitors
SO ACS APPLIED MATERIALS & INTERFACES
LA English
DT Article
DE block copolymer; directed self-assembly; cold zone annealing soft-shear;
lamellae; breakdown strength; barrier effect; dielectric; capacitor
ID THIN-FILMS; DIELECTRIC-BREAKDOWN; SOLID DIELECTRICS; ELECTRIC-FIELD;
ENERGY; NANOCOMPOSITES; ORIENTATION; ALIGNMENT; NANOPARTICLES;
PERFORMANCE
AB Emerging needs for fast charge/discharge yet high-power, lightweight, and flexible electronics requires the use of polymer-film-based solid-state capacitors with high energy densities. Fast charge/discharge rates of film capacitors on the order of microseconds are not achievable with slower charging conventional batteries, supercapacitors and related hybrid technologies. However, the current energy densities of polymer film capacitors fall short of rising demand, and could be significantly enhanced by increasing the breakdown strength (E-BD) and dielectric permittivity (epsilon(r)) of the polymer films. Co-extruded two-homopolymer component multilayered films have demonstrated much promise in this regard showing higher E-BD over that of component polymers. Multilayered films can also help incorporate functional features besides energy storage, such as enhanced optical, mechanical, thermal and barrier properties. In this work, we report accomplishing multilayer, multicomponent block copolymer dielectric films (BCDF) with soft-shear driven highly oriented self-assembled lamellar diblock copolymers (BCP) as a novel application of this important class of self-assembling materials. Results of a model PS-b-PMMA system show similar to 50% enhancement in E-BD of self-assembled multilayer lamellar BCP films compared to unordered as-cast films, indicating that the breakdown is highly sensitive to the nanostructure of the BCP. The enhancement in E-BD is attributed to the "barrier effect", where the multiple interfaces between the lamellae block components act as barriers to the dielectric breakdown through the film. The increase in E-BD corresponds to more than doubling the energy storage capacity using a straightforward directed self-assembly strategy. This approach opens a new nanomaterial paradigm for designing high energy density dielectric materials.
C1 [Samant, Saumil P.; Karim, Alamgir] Univ Akron, Dept Polymer Engn, Akron, OH 44325 USA.
[Grabowski, Christopher A.; Durstock, Michael F.] Wright Patterson Air Force Base, Air Force Res Lab, Dayton, OH 45433 USA.
[Kisslinger, Kim; Yager, Kevin G.] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA.
[Yuan, Guangcui; Satija, Sushil K.] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA.
[Raghavan, Dharmaraj] Howard Univ, Dept Chem, Washington, DC 20059 USA.
RP Karim, A (reprint author), Univ Akron, Dept Polymer Engn, Akron, OH 44325 USA.
EM alamgir@uakron.edu
FU Air Force Office of Scientific Research (AFOSR) [FA9550-12-1-0306];
National Science Foundation (NSF) [DMR-1006421]
FX This work was supported by Air Force Office of Scientific Research
(AFOSR) under contract No. FA9550-12-1-0306 and the National Science
Foundation (NSF) via Grant DMR-1006421.
NR 43
TC 7
Z9 7
U1 17
U2 57
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1944-8244
J9 ACS APPL MATER INTER
JI ACS Appl. Mater. Interfaces
PD MAR 30
PY 2016
VL 8
IS 12
BP 7966
EP 7976
DI 10.1021/acsami.5b11851
PG 11
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
SC Science & Technology - Other Topics; Materials Science
GA DI5DQ
UT WOS:000373519500043
PM 26942835
ER
PT J
AU Albert, JM
Starks, MJ
Horne, RB
Meredith, NP
Glauert, SA
AF Albert, Jay M.
Starks, Michael J.
Horne, Richard B.
Meredith, Nigel P.
Glauert, Sarah A.
TI Quasi-linear simulations of inner radiation belt electron pitch angle
and energy distributions
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
DE pitch angle distributions
ID FAST MAGNETOSONIC WAVES; PART I IMPLICIT; DIFFUSION-COEFFICIENTS;
NUMERICAL-SIMULATION; SEMIIMPLICIT SCHEMES; DYNAMICS; DIAGONALIZATION;
TENSOR; PLASMASPHERE
AB Peculiar or butterfly electron pitch angle distributions (PADs), with minima near 90 degrees, have recently been observed in the inner radiation belt. These electrons are traditionally treated by pure pitch angle diffusion, driven by plasmaspheric hiss, lightning-generated whistlers, and VLF transmitter signals. Since this leads to monotonic PADs, energy diffusion by magnetosonic waves has been proposed to account for the observations. We show that the observed PADs arise readily from two-dimensional diffusion at L = 2, with or without magnetosonic waves. It is necessary to include cross diffusion, which accounts for the relationship between pitch angle and energy changes. The distribution of flux with energy is also in good agreement with observations between 200keV and 1MeV, dropping to very low levels at higher energy. Thus, at this location radial diffusion may be negligible at subrelativistic as well as ultrarelativistic energy.
C1 [Albert, Jay M.; Starks, Michael J.] Kirtland AFB, Air Force Res Lab, Albuquerque, NM USA.
[Horne, Richard B.; Meredith, Nigel P.; Glauert, Sarah A.] British Antarctic Survey, Cambridge, England.
RP Albert, JM (reprint author), Kirtland AFB, Air Force Res Lab, Albuquerque, NM USA.
EM jay.albert@us.af.mil
OI Albert, Jay/0000-0001-9494-7630; Horne, Richard/0000-0002-0412-6407;
Meredith, Nigel/0000-0001-5032-3463
FU NASA [NNG11PJ001, NNH14AX18I]; Air Force Research Laboratory; Air Force
Office of Scientific Research [13RV08COR]; Natural Environment Research
Council
FX J. Albert thanks R.S. Selesick for useful discussions. This work was
supported by NASA grant NNG11PJ001 and NASA agreement NNH14AX18I with
the Air Force Research Laboratory, the Air Force Office of Scientific
Research grant 13RV08COR, and the Natural Environment Research Council.
NR 45
TC 8
Z9 8
U1 0
U2 0
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0094-8276
EI 1944-8007
J9 GEOPHYS RES LETT
JI Geophys. Res. Lett.
PD MAR 28
PY 2016
VL 43
IS 6
BP 2381
EP 2388
DI 10.1002/2016GL067938
PG 8
WC Geosciences, Multidisciplinary
SC Geology
GA DK1TM
UT WOS:000374697200006
ER
PT J
AU McCarthy, MC
Martinez, O
McGuire, BA
Crabtree, KN
Martin-Drumel, MA
Stanton, JF
AF McCarthy, Michael C.
Martinez, Oscar, Jr.
McGuire, Brett A.
Crabtree, Kyle N.
Martin-Drumel, Marie-Aline
Stanton, John F.
TI Isotopic studies of trans- and cis-HOCO using rotational spectroscopy:
Formation, chemical bonding, and molecular structures
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID CO REACTANT COMPLEX; HIGH-PRESSURE RANGE; INDUCED FLUORESCENCE
MEASUREMENTS; DOUBLE-RESONANCE SPECTROSCOPY; MICROWAVE SPECTROSCOPY;
INFRARED-SPECTRA; ATOM EXCHANGE; RATE-CONSTANT; BASIS-SETS; PLUS CO
AB HOCO is an important intermediate in combustion and atmospheric processes because the OH + CO -> H + CO2 reaction represents the final step for the production of CO2 in hydrocarbon oxidation, and theoretical studies predict that this reaction proceeds via various intermediates, the most important being this radical. Isotopic investigations of trans- and cis-HOCO have been undertaken using Fourier transform microwave spectroscopy and millimeter-wave double resonance techniques in combination with a supersonic molecular beam discharge source to better understand the formation, chemical bonding, and molecular structures of this radical pair. We find that trans-HOCO can be produced almost equally well from either OH + CO or H + CO2 in our discharge source, but cis-HOCO appears to be roughly two times more abundant when starting from H + CO2. Using isotopically labelled precursors, the OH + (CO)-O-18 reaction predominately yields (HOCO)-O-18 for both isomers, but (HOCO)-O-18 is observed as well, typically at the level of 10%-20% that of (HOCO)-O-18; the opposite propensity is found for the (OH)-O-18 + CO reaction. DO + (CO)-O-18 yields similar ratios between (DOCO)-O-18 and (DOCO)-O-18 as those found for OH + (CO)-O-18, suggesting that some fraction of HOCO (or DOCO) may be formed from the back-reaction H + CO2, which, at the high pressure of our gas expansion, can readily occur. The large C-13 Fermi-contact term (a(F)) for trans- and cis-(HOCO)-C-13 implicates significant unpaired electronic density in a sigma-type orbital at the carbon atom, in good agreement with theoretical predictions. By correcting the experimental rotational constants for zero-point vibration motion calculated theoretically using second-order vibrational perturbation theory, precise geometrical structures have been derived for both isomers. (C) 2016 AIP Publishing LLC.
C1 [McCarthy, Michael C.; Martinez, Oscar, Jr.; McGuire, Brett A.; Crabtree, Kyle N.; Martin-Drumel, Marie-Aline] Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA.
[McCarthy, Michael C.; Martinez, Oscar, Jr.; McGuire, Brett A.; Crabtree, Kyle N.; Martin-Drumel, Marie-Aline] Harvard Univ, Sch Engn & Appl Sci, 29 Oxford St, Cambridge, MA 02138 USA.
[McGuire, Brett A.] Natl Radio Astron Observ, Edgemont Rd, Charlottesville, VA 22901 USA.
[Stanton, John F.] Univ Texas Austin, Dept Chem & Biochem, 1 Univ Stn A5300, Austin, TX 78712 USA.
[Martinez, Oscar, Jr.] US Air Force, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
[Crabtree, Kyle N.] Univ Calif Davis, Dept Chem, Davis, CA 95616 USA.
RP McCarthy, MC (reprint author), Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA.; McCarthy, MC (reprint author), Harvard Univ, Sch Engn & Appl Sci, 29 Oxford St, Cambridge, MA 02138 USA.
EM mccarthy@cfa.harvard.edu
OI Crabtree, Kyle/0000-0001-5629-5192; Martin-Drumel,
Marie-Aline/0000-0002-5460-4294
FU U.S. National Science Foundation [CHE-1012743, CHE-1361031]; Smithsonian
Astrophysical Observatory; Robert A. Welch Foundation of Houston, Texas
[F-1283]; U.S. Department of Energy, Office of Basic Energy Sciences
[DE-FG02-07ER15884]
FX The authors thank C. A. Gottlieb, G. B. Ellison, and D. J. Nesbitt for
helpful discussions. The work in Cambridge is supported by the U.S.
National Science Foundation (Grant No. CHE-1012743). B. A. McGuire
thanks A. J. Remijan for his support. K. N. Crabtree was supported by a
CfA Postdoctoral Fellowship from the Smithsonian Astrophysical
Observatory. The work in Austin is supported by the Robert A. Welch
Foundation (Grant No. F-1283) of Houston, Texas, the U.S. National
Science Foundation (Grant No. CHE-1361031) and the U.S. Department of
Energy, Office of Basic Energy Sciences (Contract No.
DE-FG02-07ER15884).
NR 78
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U1 6
U2 17
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-9606
EI 1089-7690
J9 J CHEM PHYS
JI J. Chem. Phys.
PD MAR 28
PY 2016
VL 144
IS 12
AR 124304
DI 10.1063/1.4944070
PG 11
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA DI6XV
UT WOS:000373644400028
PM 27036445
ER
PT J
AU Altfeder, I
Lee, H
Hu, JJ
Naguy, RD
Sehirlioglu, A
Reed, AN
Voevodin, AA
Eom, CB
AF Altfeder, Igor
Lee, Hyungwoo
Hu, Jianjun
Naguy, Rachel D.
Sehirlioglu, Alp
Reed, Amber N.
Voevodin, Andrey A.
Eom, Chang-Beom
TI Scanning tunneling microscopy of an interfacial two-dimensional electron
gas in oxide heterostructures
SO PHYSICAL REVIEW B
LA English
DT Article
ID BAND INSULATORS; SRTIO3; MODULATION; SURFACES; DENSITY
AB Using an advanced technique combining pulsed laser deposition growth of LaAlO3, LaTiO3, and SrTiO3 we effectively constructed half-integer unit cell number LaAlO3-SrTiO3 heterostructures where all interfaces are of LaO-TiO2 type, and where a two-dimensional electron gas (2DEG) forms a symmetric n-type bilayer. Using ultrahigh-vacuum scanning tunneling microscopy we investigated the properties of the surface 2DEG in these heterostructures. Our results indicate that the surface 2DEG is strongly, within one unit cell, confined at the interface. Tunneling spectroscopy of the surface 2DEG reveals thickness-dependent band-gap changes attributed to the quantum size effect.
C1 [Altfeder, Igor; Hu, Jianjun; Naguy, Rachel D.; Reed, Amber N.; Voevodin, Andrey A.] Air Force Res Lab, Nanoelect Mat Branch, Wright Patterson AFB, OH 45433 USA.
[Lee, Hyungwoo; Eom, Chang-Beom] Univ Wisconsin, Dept Mat Sci & Engn, Madison, WI 53706 USA.
[Sehirlioglu, Alp] Case Western Reserve Univ, Dept Mat Sci & Engn, Cleveland, OH 44106 USA.
RP Altfeder, I (reprint author), Air Force Res Lab, Nanoelect Mat Branch, Wright Patterson AFB, OH 45433 USA.
EM Igor.Altfeder.Ctr@us.af.mil
FU US Air Force Office of Scientific Research
FX The authors acknowledge N. Zhitenev, K. Matveev, N. Bristowe, A. Roy, J.
Wohlwend, A. Safriet, A. Crespo, and D. L. Dorsey for interesting
discussions. This research was supported by the US Air Force Office of
Scientific Research.
NR 37
TC 0
Z9 0
U1 11
U2 43
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9950
EI 2469-9969
J9 PHYS REV B
JI Phys. Rev. B
PD MAR 25
PY 2016
VL 93
IS 11
AR 115437
DI 10.1103/PhysRevB.93.115437
PG 6
WC Physics, Condensed Matter
SC Physics
GA DH3VU
UT WOS:000372715700003
ER
PT J
AU Katoch, J
Le, D
Singh, S
Rao, R
Rahman, TS
Ishigami, M
AF Katoch, Jyoti
Duy Le
Singh, Simranjeet
Rao, Rahul
Rahman, Talat S.
Ishigami, Masa
TI Scattering strength of the scatterer inducing variability in graphene on
silicon oxide
SO JOURNAL OF PHYSICS-CONDENSED MATTER
LA English
DT Article
DE graphene; 2D materials; field effect mobility; silicon oxide substrates
ID AUGMENTED-WAVE METHOD; TRANSPORT
AB Large variability of carrier mobility of graphene-based field effect transistors hampers graphene science and technology. We show that the number of the scatterer responsible for the observed variability on graphene devices on silicon oxide can be determined by finding the number of hydrogen that can be chemisorbed on graphene. We use the relationship between the number of the scatterer and the mobility of graphene devices to determine that the variability-inducing scatterer possesses scattering strength 10 times smaller than that of adsorbed potassium atoms and 50 times smaller than that of ion-beam induced vacancies. Our results provide an important, quantitative input towards determining the origin of the variability.
C1 [Katoch, Jyoti; Duy Le; Singh, Simranjeet; Rahman, Talat S.; Ishigami, Masa] Univ Cent Florida, Dept Phys, Orlando, FL 32816 USA.
[Katoch, Jyoti; Ishigami, Masa] Univ Cent Florida, Nanosci Technol Ctr, Orlando, FL 32816 USA.
[Rao, Rahul] US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Rao, Rahul] UES Inc, Dayton, OH 45432 USA.
RP Ishigami, M (reprint author), Univ Cent Florida, Dept Phys, Orlando, FL 32816 USA.; Ishigami, M (reprint author), Univ Cent Florida, Nanosci Technol Ctr, Orlando, FL 32816 USA.
EM ishigami@ucf.edu
OI Katoch, Jyoti/0000-0002-3678-1780
FU National Science Foundation [0955625, CHE-1310327]
FX This work is supported by National Science Foundation grant no. 0955625.
DFT work by DL and TSR is support in part by National Science Foundation
grant CHE-1310327 and is carried out at the Stokes Advanced Research
Computing Center (Stokes ARCC) at the University of Central Florida.
Authors thank E Mucciolo for helpful discussions and E del Barco and N
Orlovskaya for sharing instruments in their lab.
NR 32
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U1 1
U2 5
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0953-8984
EI 1361-648X
J9 J PHYS-CONDENS MAT
JI J. Phys.-Condes. Matter
PD MAR 23
PY 2016
VL 28
IS 11
AR 115301
DI 10.1088/0953-8984/28/11/115301
PG 5
WC Physics, Condensed Matter
SC Physics
GA DE6HA
UT WOS:000370733400009
PM 26902181
ER
PT J
AU Duan, XFF
Burggraf, LW
AF Duan, Xiaofeng F.
Burggraf, Larry W.
TI The closo-Si12C12 molecule from cluster to crystal: A theoretical
prediction
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID SMALL SILICON CLUSTERS; ELECTRON-AFFINITIES; DENSITY; EXCHANGE; SI
AB The structure of closo-Si12C12 is unique among stable SinCm isomers (n, m > 4) because of its high symmetry, pi-pi stacking of C6 rings and unsaturated silicon atoms at symmetrical peripheral positions. Dimerization potential surfaces reveal various dimerization reactions that form between two closo-Si12C12 molecules through Si-Si bonds at unsaturated Si atoms. As a result the closo-Si12C12 molecule is capable of polymerization to form stable 1D polymer chains, 2D crystal layers, and 3D crystals. 2D crystal structures formed by side-side polymerization satisfy eight Si valences on each monomer without large distortion of the monomer structure. 3D crystals are formed by stacking 2D structures in the Z direction, preserving registry of C-6 rings in monomer moiety.
C1 [Duan, Xiaofeng F.] US Air Force, Res Lab, DoD Supercomp Resource Ctr, Wright Patterson AFB, OH 45433 USA.
[Duan, Xiaofeng F.; Burggraf, Larry W.] US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Duan, XFF (reprint author), US Air Force, Res Lab, DoD Supercomp Resource Ctr, Wright Patterson AFB, OH 45433 USA.; Duan, XFF; Burggraf, LW (reprint author), US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
EM xiaofeng.duan@wpafb.af.mil; larry.burggraf@us.af.mil
FU Molecular Dynamics and Theory research program of the Air Force Office
of Scientific Research
FX The views expressed in this work are those of the authors and do not
reflect the official policy or position of the United States Air Force,
Department of Defense, or the United States Government. We acknowledge
financial support from Molecular Dynamics and Theory research program of
the Air Force Office of Scientific Research managed by Dr. Michael
Berman. The DoD High Performance Computing Modernization Program and the
AFRL Supercomputing Resource Center (DSRC) are gratefully acknowledged
for computer time and helpful support.
NR 26
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U1 3
U2 6
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-9606
EI 1089-7690
J9 J CHEM PHYS
JI J. Chem. Phys.
PD MAR 21
PY 2016
VL 144
IS 11
AR 114309
DI 10.1063/1.4943957
PG 11
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA DI3FO
UT WOS:000373384100026
PM 27004878
ER
PT J
AU Englesbe, AC
He, ZH
Nees, JA
Thomas, AGR
Schmitt-Sody, A
Krushelnick, K
AF Englesbe, Alexander C.
He, Zhaohan
Nees, John A.
Thomas, Alexander G. R.
Schmitt-Sody, Andreas
Krushelnick, Karl
TI Control of the configuration of multiple femtosecond filaments in air by
adaptive wavefront manipulation
SO OPTICS EXPRESS
LA English
DT Article
ID WHITE-LIGHT FILAMENTS; LASER-PULSES; POWER; BEAM; DYNAMICS
AB We demonstrate the ability to position single and multiple filaments arbitrarily within the energy reservoir of a high power femtosecond laser pulse. A deformable mirror controlled by a genetic algorithm finds the optimal phase profile for producing filaments at user-defined locations within the energy reservoir to within a quarter of the nominal filament size, on average. This proof-of-principle experiment demonstrates a potential technique for fast control of the configuration of the filaments. (C) 2016 Optical Society of America
C1 [Englesbe, Alexander C.; He, Zhaohan; Nees, John A.; Thomas, Alexander G. R.; Krushelnick, Karl] Univ Michigan, Ctr Ultrafast Opt Sci, Ann Arbor, MI 48109 USA.
[Schmitt-Sody, Andreas] Air Force Res Lab, Kirtland AFB, NM 87117 USA.
RP Englesbe, AC (reprint author), Univ Michigan, Ctr Ultrafast Opt Sci, Ann Arbor, MI 48109 USA.
EM aengles@umich.edu
OI Thomas, Alexander/0000-0003-3206-8512
FU Air Force Office of Scientific Research
FX A.C.E. is grateful to Jennifer Elle for helpful discussions. Funding for
this research was provided by the Air Force Office of Scientific
Research.
NR 31
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U1 5
U2 16
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1094-4087
J9 OPT EXPRESS
JI Opt. Express
PD MAR 21
PY 2016
VL 24
IS 6
BP 6071
EP 6082
DI 10.1364/OE.24.006071
PG 12
WC Optics
SC Optics
GA DI3JU
UT WOS:000373395700063
PM 27136801
ER
PT J
AU Hu, X
Huang, QP
Zhao, Y
Cai, HL
Knize, RJ
Lu, YL
AF Hu, Xiang
Huang, Qiuping
Zhao, Yi
Cai, Honglei
Knize, Randy J.
Lu, Yalin
TI Giant frequency tunability enabled by external magnetic and a gate
electric fields in graphene devices
SO OPTICS EXPRESS
LA English
DT Article
ID TERAHERTZ WAVES; ABSORBER; METAMATERIALS; TRANSITIONS; REFLECTION;
PLASMONICS; SCATTERING
AB Graphene possesses a unique Landau level system that is non-equidistantly spaced in energy, as thus a large amount of optical transitions may become possible. Here, by utilizing this unique feature, we propose a novel dual field method which combines both external magnetic field and gate electric field together to control the optical response of the graphene-based devices. The key principle of this method is to selectively allow different optical transitions in graphene among Landau levels via an electric gate tuning of the Fermi level. By applying this method to a graphene based amplitude modulator and through an implementation based on transfer matrix method, we numerically demonstrated the well characteristics of switchable modulation on four individual channels, a huge modulation depth up to 80 dB and an extremely low required energy of tuning Fermi level down to 10 meV. Such excellent frequency tunability and gate controlling ability of this dual field method may open up the potential for applications in active optoelectronics, spin optics, ultrafast optics and etc. (C) 2016 Optical Society of America
C1 [Hu, Xiang; Huang, Qiuping; Zhao, Yi; Cai, Honglei; Lu, Yalin] Univ Sci & Technol China, Adv Appl Res Ctr, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China.
[Lu, Yalin] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230026, Anhui, Peoples R China.
[Huang, Qiuping; Lu, Yalin] Univ Sci & Technol China, Synerget Innovat Ctr Quantum Informat & Quantum P, Hefei 230026, Peoples R China.
[Knize, Randy J.; Lu, Yalin] US Air Force Acad, Laser & Opt Res Ctr, Dept Phys, Colorado Springs, CO 80840 USA.
RP Huang, QP; Lu, YL (reprint author), Univ Sci & Technol China, Adv Appl Res Ctr, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China.; Lu, YL (reprint author), Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230026, Anhui, Peoples R China.; Huang, QP; Lu, YL (reprint author), Univ Sci & Technol China, Synerget Innovat Ctr Quantum Informat & Quantum P, Hefei 230026, Peoples R China.; Lu, YL (reprint author), US Air Force Acad, Laser & Opt Res Ctr, Dept Phys, Colorado Springs, CO 80840 USA.
EM qphuang@ustc.edu.cn; yllu@ustc.edu.cn
FU National Basic Research Program of China [2012CB922000]; US Air Force
Office of Scientific Research (AFOSR); DTRA (DTRAA) [122221]
FX This work was supported by the National Basic Research Program of China
(2012CB922000). Dr. Lu thanks the support from US Air Force Office of
Scientific Research (AFOSR) and the support from DTRA (DTRAA 122221).
NR 38
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U2 37
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1094-4087
J9 OPT EXPRESS
JI Opt. Express
PD MAR 21
PY 2016
VL 24
IS 6
BP 6606
EP 6618
DI 10.1364/OE.24.006606
PG 13
WC Optics
SC Optics
GA DI3JU
UT WOS:000373395700112
PM 27136850
ER
PT J
AU Hannah, IG
Grefenstette, BW
Smith, DM
Glesener, L
Krucker, S
Hudson, HS
Madsen, KK
Marsh, A
White, SM
Caspi, A
Shih, AY
Harrison, FA
Stern, D
Boggs, SE
Christensen, FE
Craig, WW
Hailey, CJ
Zhang, WW
AF Hannah, Iain G.
Grefenstette, Brian W.
Smith, David M.
Glesener, Lindsay
Krucker, Saem
Hudson, Hugh S.
Madsen, Kristin K.
Marsh, Andrew
White, Stephen M.
Caspi, Amir
Shih, Albert Y.
Harrison, Fiona A.
Stern, Daniel
Boggs, Steven E.
Christensen, Finn E.
Craig, William W.
Hailey, Charles J.
Zhang, William W.
TI THE FIRST X-RAY IMAGING SPECTROSCOPY OF QUIESCENT SOLAR ACTIVE REGIONS
WITH NuSTAR
SO ASTROPHYSICAL JOURNAL LETTERS
LA English
DT Article
DE Sun: activity; Sun: corona; Sun: X-rays, gamma rays
ID HOT PLASMA; LOOPS OBSERVATIONS; ATOMIC DATABASE; CORONAL LOOPS; QUIET
SUN; EMISSION; RHESSI; HINODE; TELESCOPE; SPECTRUM
AB We present the first observations of quiescent active regions (ARs) using the Nuclear Spectroscopic Telescope Array (NuSTAR), a focusing hard X-ray telescope capable of studying faint solar emission from high-temperature and non-thermal sources. We analyze the first directly imaged and spectrally resolved X-rays above 2 keV from non-flaring ARs, observed near the west limb on 2014 November 1. The NuSTAR X-ray images match bright features seen in extreme ultraviolet and soft X-rays. The NuSTAR imaging spectroscopy is consistent with isothermal emission of temperatures 3.1-4.4 MK and emission measures 1-8 x 10(46) cm(-3). We do not observe emission above 5 MK, but our short effective exposure times restrict the spectral dynamic range. With few counts above 6 keV, we can place constraints on the presence of an additional hotter component between 5 and 12 MK of similar to 10(46) cm(-3) and similar to 10(43) cm(-3), respectively, at least an order of magnitude stricter than previous limits. With longer duration observations and a weakening solar cycle (resulting in an increased livetime), future NuSTAR observations will have sensitivity to a wider range of temperatures as well as possible non-thermal emission.
C1 [Hannah, Iain G.; Hudson, Hugh S.] Univ Glasgow, SUPA Sch Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland.
[Grefenstette, Brian W.; Madsen, Kristin K.; Harrison, Fiona A.] CALTECH, Cahill Ctr Astrophys, 1216 E Calif Blvd, Pasadena, CA 91125 USA.
[Smith, David M.; Marsh, Andrew] Univ Calif Santa Cruz, Santa Cruz Inst Particle Phys, Santa Cruz, CA 95064 USA.
[Smith, David M.; Marsh, Andrew] Univ Calif Santa Cruz, Dept Phys, Santa Cruz, CA 95064 USA.
[Glesener, Lindsay] Univ Minnesota Twin Cities, Sch Phys & Astron, Minneapolis, MN 55455 USA.
[Glesener, Lindsay; Krucker, Saem; Hudson, Hugh S.; Boggs, Steven E.] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
[Krucker, Saem] Univ Appl Sci & Arts Northwestern Switzerland, Sch Engn, Inst Technol 4D, CH-5210 Windisch, Switzerland.
[White, Stephen M.] Air Force Res Lab, Space Vehicles Directorate, 3550 Aberdeen Ave SE, Kirtland AFB, NM 87117 USA.
[Caspi, Amir] Southwest Res Inst, Boulder, CO 80302 USA.
[Shih, Albert Y.] NASA, Goddard Space Flight Ctr, Solar Phys Lab, Greenbelt, MD 20771 USA.
[Stern, Daniel] CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
[Christensen, Finn E.] Tech Univ Denmark, Natl Space Inst, DTU Space, Elektrovej 327, DK-2800 Lyngby, Denmark.
[Craig, William W.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Hailey, Charles J.] Columbia Univ, Columbia Astrophys Lab, 538 W 120th St, New York, NY 10027 USA.
[Zhang, William W.] NASA, Goddard Space Flight Ctr, Astrophys Sci Div, Greenbelt, MD 20771 USA.
RP Hannah, IG (reprint author), Univ Glasgow, SUPA Sch Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland.
EM iain.hannah@glasgow.ac.uk
RI Hannah, Iain/F-1972-2011; Boggs, Steven/E-4170-2015;
OI Hannah, Iain/0000-0003-1193-8603; Boggs, Steven/0000-0001-9567-4224;
Hudson, Hugh/0000-0001-5685-1283; Madsen, Kristin/0000-0003-1252-4891;
Caspi, Amir/0000-0001-8702-8273
FU National Aeronautics and Space Administration; NASA [NNX12AJ36G,
NNX14AG07G, NNX13AM41H, 200021-140308, NASA NNX15AK26G, NNX14AN84G]
FX This paper made use of data from the NuSTAR mission, a project led by
the California Institute of Technology, managed by the Jet Propulsion
Laboratory, funded by the National Aeronautics and Space Administration.
We thank the NuSTAR Operations, Software, and Calibration teams for
support with the execution and analysis of these observations. This
research made use of the NuSTAR Data Analysis Software (NUSTAR-DAS)
jointly developed by the ASI Science Data Center (ASDC, Italy) and the
California Institute of Technology (USA). This work is supported by:
NASA grants NNX12AJ36G, NNX14AG07G, IGH (Royal Society University
Research Fellowship), AM (NASA Earth Space Science Fellowship,
NNX13AM41H), SK (Swiss National Science Foundation, 200021-140308), AC
(NASA NNX15AK26G, NNX14AN84G). Thanks to Kim Tolbert for OSPEX help.
NR 47
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U1 0
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 2041-8205
EI 2041-8213
J9 ASTROPHYS J LETT
JI Astrophys. J. Lett.
PD MAR 20
PY 2016
VL 820
IS 1
AR L14
DI 10.3847/2041-8205/820/1/L14
PG 7
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA DG8RT
UT WOS:000372352000014
ER
PT J
AU Turner, TJ
Shade, PA
Bernier, JV
Li, SF
Schuren, JC
Lind, J
Lienert, U
Kenesei, P
Suter, RM
Blank, B
Almer, J
AF Turner, Todd J.
Shade, Paul A.
Bernier, Joel V.
Li, Shiu Fai
Schuren, Jay C.
Lind, Jonathan
Lienert, Ulrich
Kenesei, Peter
Suter, Robert M.
Blank, Basil
Almer, Jonathan
TI Combined near- and far-field high-energy diffraction microscopy dataset
for Ti-7Al tensile specimen elastically loaded in situ
SO INTEGRATING MATERIALS AND MANUFACTURING INNOVATION
LA English
DT Article
DE High-energy diffraction microscopy (HEDM); X-ray diffraction; Far-field
diffraction; Near-field diffraction; Three-dimensional microstructure;
Crystal plasticity finite element modeling (CPFEM)
ID X-RAY-DIFFRACTION; ELECTRON-MICROSCOPY; CRYSTAL PLASTICITY;
SINGLE-GRAIN; DEFORMATION; POLYCRYSTALS; MICROSTRUCTURE; SIMULATIONS;
ORIENTATION; ALUMINUM
AB High-energy diffraction microscopy (HEDM) constitutes a suite of combined X-ray characterization methods, which hold the unique advantage of illuminating the microstructure and micromechanical state of a material during concurrent in situ mechanical deformation. The data generated from HEDM experiments provides a heretofore unrealized opportunity to validate meso-scale modeling techniques, such as crystal plasticity finite element modeling (CPFEM), by explicitly testing the accuracy of these models at the length scales where the models predict their response. Combining HEDM methods with in situ loading under known and controlled boundary conditions represents a significant challenge, inspiring the recent development of a new high-precision rotation and axial motion system for simultaneously rotating and axially loading a sample. In this paper, we describe the initial HEDM dataset collected using this hardware on an alpha-titanium alloy (Ti-7Al) under in situ tensile deformation at the Advanced Photon Source, Argonne National Laboratory. We present both near-field HEDM data that maps out the grain morphology and intragranular crystallographic orientations and far-field HEDM data that provides the grain centroid, grain average crystallographic orientation, and grain average elastic strain tensor for each grain. Finally, we provide a finite element mesh that can be utilized to simulate deformation in the volume of this Ti-7Al specimen. The dataset supporting this article is available in the National Institute of Standards and Technology (NIST) repository (http://hdl.handle.net/11256/599).
C1 [Turner, Todd J.; Shade, Paul A.; Schuren, Jay C.] Air Force Res Lab, Mat & Mfg Directorate, 2230 10th St, Wright Patterson AFB, OH 45433 USA.
[Bernier, Joel V.; Li, Shiu Fai; Lind, Jonathan] Lawrence Livermore Natl Lab, Engn Directorate, 7000 East Ave, Livermore, CA 94550 USA.
[Lind, Jonathan; Suter, Robert M.] Carnegie Mellon Univ, 5000 Forbes Ave, Pittsburgh, PA 15213 USA.
[Lienert, Ulrich] DESY, DESY Petra 3 Notkestr 85, D-22603 Hamburg, Germany.
[Kenesei, Peter; Almer, Jonathan] Argonne Natl Lab, Adv Photon Source, 9700 S Cass Ave, Argonne, IL 60439 USA.
[Blank, Basil] PulseRay, 4583 State Route 414, Beaver Dams, NY 14812 USA.
RP Turner, TJ (reprint author), Air Force Res Lab, Mat & Mfg Directorate, 2230 10th St, Wright Patterson AFB, OH 45433 USA.
EM Todd.Turner.5@us.af.mil
RI Suter, Robert/P-2541-2014
OI Suter, Robert/0000-0002-0651-0437
NR 32
TC 1
Z9 1
U1 6
U2 9
PU SPRINGER HEIDELBERG
PI HEIDELBERG
PA TIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANY
SN 2193-9764
EI 2193-9772
J9 INTEGR MATER MANUF I
JI Integr. Mater. Manuf. Innov.
PD MAR 18
PY 2016
VL 5
DI 10.1186/s40192-016-0048-1
PG 9
WC Materials Science, Multidisciplinary
SC Materials Science
GA DO7SX
UT WOS:000377984400001
ER
PT J
AU Jiang, J
Pachter, R
Demeritte, T
Ray, PC
Islam, AE
Maruyama, B
Boeckl, JJ
AF Jiang, Jie
Pachter, Ruth
Demeritte, Teresa
Ray, Paresh C.
Islam, Ahmad E.
Maruyama, Benji
Boeckl, John J.
TI Modeling Graphene with Nanoholes: Structure and Characterization by
Raman Spectroscopy with Consideration for Electron Transport
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID SINGLE-LAYER GRAPHENE; NANOPOROUS GRAPHENE; WATER DESALINATION;
MONOLAYER GRAPHENE; POROUS GRAPHENE; GAS SEPARATION; TUMOR-CELLS; OXIDE;
OXIDATION; MEMBRANE
AB Recent advances in controlled synthesis and characterization of single-layer graphene nanostructures with defects provide the basis for gaining an understanding of the complex nanomaterials by theoretical investigation. In this work, we modeled defective single-layer graphene (DSLG), where nanostructures with divacancy, trivacancy, tetravacancy, pentavacancy, hexavacancy, and heptavacancy defects, having pore sizes from 0.1 to 0.5 nm, were considered. Nanostructures with molecular oxygen adsorption to mimic experimental conditions were also investigated. On the basis of calculated formation energies of the optimized nanostructures, a few DSLGs were selected for theoretical characterization of the defect-induced I(D)/I(D') Raman intensity ratios. We found that the I(D)/I(D') ratio decreases with an increase in the nanohole size and in the number of adsorbed oxygens, which explains an experimental observation of a decrease in this characterization signature with an increase in exposure time to oxygen plasma. The predicted ratio was also confirmed by Raman spectroscopy measurements for graphene oxide quantum dots. The results were rationalized based on an analytical analysis of the D' band electron-defect matrix elements. Finally, consideration of patterned graphene nanostructures with vacancies for field effect transistor (FET) application was shown to provide a route to bandgap generation, and potentially improvement of the I-on/I-off ratio in a FET by nanohole passivation, e.g., by hydrogenation. FETs based on patterned graphene with small pores could have a similar high level of performance as graphene nanoribbons, however with the added benefit of no width confinement.
C1 [Jiang, Jie; Pachter, Ruth; Islam, Ahmad E.; Maruyama, Benji; Boeckl, John J.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Demeritte, Teresa; Ray, Paresh C.] Jackson State Univ, Jackson, MS 39217 USA.
RP Pachter, R (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM ruth.pachter@us.af.mil
OI Jiang, Junke/0000-0003-2962-766X
FU Air Force Office of Scientific Research
FX We gratefully acknowledge support by the Air Force Office of Scientific
Research and computational resources and helpful assistance provided by
the AFRL DSRC.
NR 72
TC 5
Z9 5
U1 21
U2 44
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD MAR 17
PY 2016
VL 120
IS 10
BP 5371
EP 5383
DI 10.1021/acs.jpcc.5b10225
PG 13
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA DH1QY
UT WOS:000372561200013
ER
PT J
AU Zhang, YY
de La Harpe, K
Beckstead, AA
Martinez-Fernandez, L
Improta, R
Kohler, B
AF Zhang, Yuyuan
de La Harpe, Kimberly
Beckstead, Ashley A.
Martinez-Fernandez, Lara
Improta, Roberto
Kohler, Bern
TI Excited-State Dynamics of DNA Duplexes with Different H-Bonding Motifs
SO JOURNAL OF PHYSICAL CHEMISTRY LETTERS
LA English
DT Article
ID CHARGE SEPARATION; ELECTRON-TRANSFER; PROTON-TRANSFER; BASE-PAIRS;
POLY(DG-DC); STRANDS; PURINE; FORMS; WATER
AB The excited-state dynamics of three distinct forms of the d(GC)(9)center dot d(GC)(9) DNA duplex were studied by combined time-resolved infrared experiments and quantum mechanical calculations. In the B- and Z-forms, bases on opposite strands form Watson-Crick (WC) base pairs but stack differently because of salt-induced changes in backbone conformation. At low pH, the two strands associate by Hoogsteen (HG) base pairing. Ultraviolet-induced intrastrand electron transfer (ET) triggers interstrand proton transfer (PT) in the B- and Z-forms, but the PT pathway is blocked in the HG duplex. Despite the different decay mechanisms, a common excited-state lifetime of similar to 30 ps is observed in all three duplex forms. The ET-PT pathway in the WC duplexes and the solely intrastrand ET pathway in the HG duplex yield the same pair of pi-stacked radicals on one strand. Back ET between these radicals is proposed to be the rate-limiting step behind excited-state deactivation in all three duplexes.
C1 [Zhang, Yuyuan; Beckstead, Ashley A.; Kohler, Bern] Montana State Univ, Dept Chem & Biochem, Bozeman, MT 59717 USA.
[de La Harpe, Kimberly] US Air Force Acad, Dept Phys, Colorado Springs, CO 80840 USA.
[Martinez-Fernandez, Lara; Improta, Roberto] CNR, Ist Biostrutture & Bioimmagini, I-80136 Naples, Italy.
RP Kohler, B (reprint author), Montana State Univ, Dept Chem & Biochem, Bozeman, MT 59717 USA.; Improta, R (reprint author), CNR, Ist Biostrutture & Bioimmagini, I-80136 Naples, Italy.
EM robimp@unina.it; bkohler@montana.edu
RI Zhang, Yuyuan/D-6376-2013; Kohler, Bern/A-1728-2011; Martinez-Fernandez,
Lara/B-2119-2012
OI Kohler, Bern/0000-0001-5353-1655; Martinez-Fernandez,
Lara/0000-0001-5361-9390
FU NSF [CHE-1112560]; M. J. Murdock Charitable Trust; Italian Ministero
dell'Istruzione, dell'Universita e della Ricerca (MIUR)
[PRIN-2010ERFKXL]; French Agency for Research Grant
[ANR-12-BS08-0001-01]; LR Campania [5/2002]
FX Work at Montana State University was supported by the NSF (CHE-1112560).
The TRIR spectrometer was constructed with funding from the M. J.
Murdock Charitable Trust. R. I. and L. M.-F. were supported by the
Italian Ministero dell'Istruzione, dell'Universita e della Ricerca (MIUR
Grants PRIN-2010ERFKXL), and French Agency for Research Grant
ANR-12-BS08-0001-01 and LR Campania num 5/2002 - Annualita 2007.
NR 22
TC 4
Z9 4
U1 10
U2 32
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1948-7185
J9 J PHYS CHEM LETT
JI J. Phys. Chem. Lett.
PD MAR 17
PY 2016
VL 7
IS 6
BP 950
EP 954
DI 10.1021/acs.jpclett.6b00074
PG 5
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary; Physics, Atomic, Molecular & Chemical
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA DH1RF
UT WOS:000372561900003
PM 26886244
ER
PT J
AU Zheng, ZG
Li, YN
Bisoyi, HK
Wang, L
Bunning, TJ
Li, Q
AF Zheng, Zhi-gang
Li, Yannian
Bisoyi, Hari Krishna
Wang, Ling
Bunning, Timothy J.
Li, Quan
TI Three-dimensional control of the helical axis of a chiral nematic liquid
crystal by light
SO NATURE
LA English
DT Article
ID DIFFRACTION GRATINGS; HANDEDNESS INVERSION; POLYMER; PITCH;
SUPERSTRUCTURES
AB Chiral nematic liquid crystals-otherwise referred to as cholesteric liquid crystals (CLCs)-are self-organized helical superstructures that find practical application in, for example, thermography(1), reflective displays(2), tuneable colour filters(3,4) and mirrorless lasing(5,6). Dynamic, remote and three-dimensional control over the helical axis of CLCs is desirable, but challenging(7,8). For example, the orientation of the helical axis relative to the substrate can be changed from perpendicular to parallel by applying an alternating-current electric field(9), by changing the anchoring conditions of the substrate, or by altering the topography of the substrate's surface(10-16); separately, in-plane rotation of the helical axis parallel to the substrate can be driven by a direct-current field(17-19). Here we report three-dimensional manipulation of the helical axis of a CLC, together with inversion of its handedness, achieved solely with a light stimulus. We use this technique to carry out light-activated, wide-area, reversible two-dimensional beam steering-previously accomplished using complex integrated systems(20) and optical phased arrays(21). During the three-dimensional manipulation by light, the helical axis undergoes, in sequence, a reversible transition from perpendicular to parallel, followed by in-plane rotation on the substrate surface. Such reversible manipulation depends on experimental parameters such as cell thickness, surface anchoring condition, and pitch length. Because there is no thermal relaxation, the system can be driven either forwards or backwards from any light-activated intermediate state. We also describe reversible photocontrol between a two-dimensional diffraction state, a one-dimensional diffraction state and a diffraction 'off' state in a bilayer cell.
C1 [Zheng, Zhi-gang; Li, Yannian; Bisoyi, Hari Krishna; Wang, Ling; Li, Quan] Kent State Univ, Inst Liquid Crystal, Kent, OH 44242 USA.
[Zheng, Zhi-gang; Li, Yannian; Bisoyi, Hari Krishna; Wang, Ling; Li, Quan] Kent State Univ, Chem Phys Interdisciplinary Program, Kent, OH 44242 USA.
[Bunning, Timothy J.] US Air Force, Mat & Mfg Directorate, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Li, Q (reprint author), Kent State Univ, Inst Liquid Crystal, Kent, OH 44242 USA.; Li, Q (reprint author), Kent State Univ, Chem Phys Interdisciplinary Program, Kent, OH 44242 USA.
EM qli1@kent.edu
FU Air Force Office of Scientific Research (AFOSR) [FA9950-09-1-0193]; Air
Force Research Laboratory; China Scholarship Council; Materials and
Manufacturing Directorate; AFOSR
FX Q.L. acknowledges support from the Air Force Office of Scientific
Research (AFOSR; grant no. FA9950-09-1-0193) and the Air Force Research
Laboratory. Z.Z. acknowledges receipt of a Scholarship supported by the
China Scholarship Council. T.J.B. acknowledges support from the
Materials and Manufacturing Directorate and the AFOSR.
NR 29
TC 36
Z9 37
U1 32
U2 116
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 0028-0836
EI 1476-4687
J9 NATURE
JI Nature
PD MAR 17
PY 2016
VL 531
IS 7594
BP 352
EP +
DI 10.1038/nature17141
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA DG4TA
UT WOS:000372064300049
PM 26950601
ER
PT J
AU Martin, JA
Kwak, J
Harshman, SW
Chan, K
Fan, M
Geier, BA
Grigsby, CC
Ott, DK
AF Martin, Jennifer A.
Kwak, Jae
Harshman, Sean W.
Chan, Karen
Fan, Maomian
Geier, Brian A.
Grigsby, Claude C.
Ott, Darrin K.
TI Field sampling demonstration of portable thermal desorption collection
and analysis instrumentation
SO INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
LA English
DT Article
DE LESS-P; GC-MS; HAPSITE (R) ER; thermal desorption; Field sampling
ID VOLATILE ORGANIC-COMPOUNDS; CHROMATOGRAPHY-MASS-SPECTROMETRY; CHEMICAL
WARFARE AGENTS; AIR-POLLUTION SOURCES; IDENTIFICATION; ADSORBENTS;
EMISSIONS; SAMPLERS; FACILITY; BENZENE
AB The HAPSITE (R) (Hazardous Air Pollutants on Site) is a portable gas chromatography-mass spectrometry (GC-MS) unit designed to aid air sampling technicians by identifying and quantifying volatile organic compounds from occupational and environmental sampling. The main goal of the present study was to extend prior laboratory-based work with the portable HAPSITE (R) ER (extended range model) thermal desorption (TD) capability to real-world field samples from both indoor and outdoor environments using different types of active and passive sampling mechanisms. Understanding the performance of the HAPSITE (R) ER in a realistic field setting will allow air quality sampling technicians to make improved decisions related to sampling and analysis methods in the field. An important finding was that certain charcoal-based TD sorbents were contraindicated for the HAPSITE (R) ER because of a substantial hydrocarbon bleed which degraded system performance. A novel time series TD sampler (Logistically Enabled Sampling System-Portable [LESS-P]) was validated using Tenax TA TD tubes against standard active sampling across multiple field sampling sites, and the qualitative analytical trends and compound identities were similar between LESS-P replicates analysed via benchtop GC-MS and HAPSITE (R) ER. Once validated, the LESS-P was used to determine the reference concentrations for passive sampling calculations. The results confirmed the passive sampling methodology within the benchtop system, but highlighted some systemic sensitivity limitations that must be addressed in order for the HAPSITE (R) to be accurately applied to passive sampling. We propose that the LESS-P time-series sampler may help to alleviate the requirement for sampling technicians to be on-site during active sampling, allowing for automated sampling throughout the duration of a sampling event.
C1 [Martin, Jennifer A.; Harshman, Sean W.; Geier, Brian A.] UES Inc, 711 Human Performance Wing, Dayton, OH 45433 USA.
[Martin, Jennifer A.; Harshman, Sean W.; Chan, Karen; Fan, Maomian; Geier, Brian A.; Grigsby, Claude C.] Air Force Res Lab, Human Effectiveness Directorate, 711 Human Performance Wing, Dayton, OH 45433 USA.
[Kwak, Jae] Univ Vet Med, Res Inst Wildlife Ecol, Vienna, Austria.
[Chan, Karen] CMETSS, Dayton, OH USA.
[Ott, Darrin K.] USAF, Sch Aerosp Med, Air Force Res Lab, Dayton, OH USA.
RP Martin, JA (reprint author), UES Inc, 711 Human Performance Wing, Dayton, OH 45433 USA.; Martin, JA (reprint author), Air Force Res Lab, Human Effectiveness Directorate, 711 Human Performance Wing, Dayton, OH 45433 USA.
EM jennifer.martin.30.ctr@us.af.mil
FU United States Air Force [FA8650-14-D-6516]
FX This work was supported by a subcontract under United States Air Force
[grant number FA8650-14-D-6516]. This research was supported in part by
an appointment (EH) to the Student Research Participation Program at
U.S. Air Force Research Laboratory, 711th Human Performance Wing
administered by the Oak Ridge Institute for Science and Education
through an interagency agreement between the U.S. Department of Energy
and USAFRL.
NR 36
TC 0
Z9 0
U1 15
U2 29
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0306-7319
EI 1029-0397
J9 INT J ENVIRON AN CH
JI Int. J. Environ. Anal. Chem.
PD MAR 15
PY 2016
VL 96
IS 4
BP 299
EP 319
DI 10.1080/03067319.2016.1160384
PG 21
WC Chemistry, Analytical; Environmental Sciences
SC Chemistry; Environmental Sciences & Ecology
GA DI5JJ
UT WOS:000373534400001
ER
PT J
AU Chodash, PA
Burke, JT
Norman, EB
Wilks, SC
Casperson, RJ
Fisher, SE
Holliday, KS
Jeffries, JR
Wakeling, MA
AF Chodash, P. A.
Burke, J. T.
Norman, E. B.
Wilks, S. C.
Casperson, R. J.
Fisher, S. E.
Holliday, K. S.
Jeffries, J. R.
Wakeling, M. A.
TI Nuclear excitation by electronic transition of U-235
SO PHYSICAL REVIEW C
LA English
DT Article
ID HALF-LIFE; NEET; MECHANISMS; RADIATION; OS-189; AU-197; PLASMA
AB Background: Nuclear excitation by electronic transition (NEET) is a rare nuclear excitation that can occur in isotopes containing a low-lying nuclear excited state. Over the past 40 yr, several experiments have attempted to measure NEET of U-235 and those experiments have yielded conflicting results.
Purpose: An experiment was performed to determine whether NEET of U-235 occurs and to determine its excitation rate.
Method: A pulsed Nd:YAG laser operating at 1064 nm with a pulse energy of 790 mJ and a pulse width of 9 ns was used to generate a uranium plasma. The plasma was collected on a catcher plate and electrons from the catcher plate were accelerated and focused onto a microchannel plate detector. An observation of a decay with a 26-min half-life would suggest the creation of U-235m and the possibility that NEET of U-235 occurred.
Results: A 26-min decay consistent with the decay of U-235m was not observed and there was no evidence that NEET occurred. An upper limit for the NEET rate of U-235 was determined to be lambda(NEET) < 1.8 x 10(-4) s(-1), with a confidence level of 68.3%.
Conclusions: The upper limit determined from this experiment is consistent with most of the past measurements. Discrepancies between this experiment and past measurements can be explained by assuming that past experiments misinterpreted the data.
C1 [Chodash, P. A.; Norman, E. B.] Univ Calif Berkeley, Dept Nucl Engn, Berkeley, CA 94720 USA.
[Burke, J. T.; Casperson, R. J.] Lawrence Livermore Natl Lab, Nucl & Chem Sci Div, Livermore, CA 94550 USA.
[Wilks, S. C.] Lawrence Livermore Natl Lab, Div Phys, Livermore, CA 94550 USA.
[Fisher, S. E.] Lawrence Livermore Natl Lab, Natl Secur Engn Div, Livermore, CA 94550 USA.
[Holliday, K. S.; Jeffries, J. R.] Lawrence Livermore Natl Lab, Div Mat Sci, Livermore, CA 94550 USA.
[Wakeling, M. A.] US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Chodash, PA (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RI Chodash, Perry/P-1840-2014
OI Chodash, Perry/0000-0002-4154-7219
FU Lawrence Livermore National Laboratory [DE-AC52-07NA27344]; National
Nuclear Security Administration's Next Generation Safeguards Initiative
(NGSI); US Department of Homeland Security; Nuclear Science and Security
Consortium under DOE [DE-NA-0000979]; UC Berkeley
FX This work was performed under the auspices of the US Department of
Energy by Lawrence Livermore National Laboratory under Contract No.
DE-AC52-07NA27344. This research was additionally performed under
appointment to the Nuclear Nonproliferation International Safeguards
Graduate Fellowship Program sponsored by the National Nuclear Security
Administration's Next Generation Safeguards Initiative (NGSI). This work
was further supported by the US Department of Homeland Security, UC
Berkeley, and the Nuclear Science and Security Consortium under DOE
Contract No. DE-NA-0000979.
NR 31
TC 1
Z9 1
U1 4
U2 11
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9985
EI 2469-9993
J9 PHYS REV C
JI Phys. Rev. C
PD MAR 11
PY 2016
VL 93
IS 3
AR 034610
DI 10.1103/PhysRevC.93.034610
PG 11
WC Physics, Nuclear
SC Physics
GA DG3IP
UT WOS:000371963000002
ER
PT J
AU Kahler, SW
AF Kahler, S. W.
TI SOLAR ENERGETIC PARTICLE EVENT ONSETS: FAR BACKSIDE SOLAR SOURCES AND
THE EAST-WEST HEMISPHERIC ASYMMETRY
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE acceleration of particles; Sun: coronal mass ejections (CMEs); Sun:
flares; Sun: particle emission
ID CORONAL MASS EJECTIONS; INTERPLANETARY SHOCKS; PEAK INTENSITIES;
RADIO-BURSTS; JANUARY 28; SPACECRAFT; PROTONS; FLARE; HELIOSPHERE;
VARIABILITY
AB Prompt onsets and short rise times to peak intensities Ip have been noted in a few solar energetic (E > 10 MeV) particle (SEP) events from far behind (>= 25 degrees) the west limb. We discuss 15 archival and recent examples of these prompt events, giving their source longitudes, onset and rise times, and associated coronal mass ejection (CME) speeds. Their timescales and CME speeds are not exceptional in comparison with a larger set of SEP events from behind the west limb. A further statistical comparison of observed timescales of SEP events from behind the west limb with events similarly poorly magnetically connected to the eastern hemisphere (EH) shows the longer timescales of the latter group. We interpret this result in terms of a difference between SEP production at parallel shocks on the eastern flanks of western backside events and at perpendicular shocks on the western flanks of EH events.
C1 [Kahler, S. W.] Air Force Res Lab, Space Vehicles Directorate, 3550 Aberdeen Ave, Kirtland AFB, NM 87117 USA.
RP Kahler, SW (reprint author), Air Force Res Lab, Space Vehicles Directorate, 3550 Aberdeen Ave, Kirtland AFB, NM 87117 USA.
EM stephen.kahler@kirtland.af.mil
FU AFOSR [15RVCOR167]
FX S.K. was funded by AFOSR Task 15RVCOR167. CME data were taken from the
CDAW LASCO catalog. This CME catalog is generated and maintained at the
CDAW Data Center by NASA and The Catholic University of America in
cooperation with the Naval Research Laboratory. SOHO is a project of
international cooperation between ESA and NASA. The reviewer provided
helpful questions and comments that improved the manuscript.
NR 41
TC 2
Z9 2
U1 3
U2 5
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
EI 1538-4357
J9 ASTROPHYS J
JI Astrophys. J.
PD MAR 10
PY 2016
VL 819
IS 2
AR 105
DI 10.3847/0004-637X/819/2/105
PG 6
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA DG8AV
UT WOS:000372305700017
ER
PT J
AU Wiens, JP
Sawyer, JC
Miller, TM
Shuman, NS
Viggiano, AA
Khamesian, M
Kokoouline, V
Fabrikant, II
AF Wiens, Justin P.
Sawyer, Jordan C.
Miller, Thomas M.
Shuman, Nicholas S.
Viggiano, Albert A.
Khamesian, Marjan
Kokoouline, Viatcheslav
Fabrikant, Ilya I.
TI Electron attachment to the interhalogen compounds ClF, ICl, and IBr
SO PHYSICAL REVIEW A
LA English
DT Article
ID LOW-ENERGY-ELECTRON; CAPTURE RATE CONSTANTS; DISSOCIATIVE ATTACHMENT;
TRAJECTORY CALCULATIONS; VIBRATIONAL-EXCITATION; FLOWING AFTERGLOW;
LOW-TEMPERATURES; FLUORIDES CLFN; MOLECULE; ION
AB Thermal electron attachment rate coefficients for three interhalogen compounds (ClF, ICl, IBr) have been measured from 300 to 900 K at pressures of 1-2 Torr using a flowing afterglow-Langmuir probe apparatus. ClF attaches somewhat inefficiently (k = 7.5x10(-9) cm(3) s(-1)) at 300 K, with the rate coefficient rising to 1.7x10(-8) cm(3) s(-1) at 700 K. At higher temperatures the apparent rate coefficient falls steeply; however, this is interpreted as an artifact due to decomposition on the walls of the inlet line. ICl attaches with even lower efficiency (k = 9.5x10(-10) cm(3) s(-1) at 300 K) and a less steep increase with temperature. Attachment to IBr is too slow to confidently measure with the present experiment, with an upper limit on the rate coefficient of 10(-10) cm(3) s(-1) from 300 to 600 K. Both ClF and ICl attach dissociatively to yield Cl-, likely exclusively, though F-or I-may be produced with limits of <2% and <5%, respectively. The ClF attachment was further explored through ab initio calculation of the ClF and ClF-potential energy curves and R-matrix calculations of the resonance parameters which were used then for calculations of the dissociative attachment cross sections and rate coefficients. While the magnitude of the attachment rate coefficient for ClF is similar to those for both Cl-2 and F-2, the calculated cross sections show qualitatively different threshold behavior due to the s-wave contribution allowed by the lack of inversion symmetry. The nu = 1 and 2 vibrational modes of ClF attach about three to four times faster than nu = 0 and 3 at energies lower than similar to 0.2 eV. The calculated rate coefficients are in good agreement with the experiment at 300 K and increase moderately less steeply with temperature.
C1 [Wiens, Justin P.; Sawyer, Jordan C.; Miller, Thomas M.; Shuman, Nicholas S.; Viggiano, Albert A.] Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
[Khamesian, Marjan; Kokoouline, Viatcheslav] Univ Cent Florida, Dept Phys, Orlando, FL 32816 USA.
[Fabrikant, Ilya I.] Univ Nebraska, Dept Phys & Astron, Lincoln, NE 68588 USA.
RP Viggiano, AA (reprint author), Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
EM afrl.rvborgmailbox@kirtland.af.mil
FU Air Force Office of Scientific Research [AFOSR-2303EP]; National
Research Council Research Associateship Program; Institute for
Scientific Research of Boston College [FA9453-10-C-0206]; DOE Office of
Basic Energy Science; National Science Foundation [PHY-15-06391,
PHY-14-01788]
FX Experiments were supported by the Air Force Office of Scientific
Research (Grant No. AFOSR-2303EP). J.P.W. is supported by the National
Research Council Research Associateship Program. J.C.S. completed this
work through participation in the AFRL Space Scholar program. T.M.M.
acknowledges the support from the Institute for Scientific Research of
Boston College under Contract No. FA9453-10-C-0206. Theoretical work was
supported by the DOE Office of Basic Energy Science and the National
Science Foundation, Grants No. PHY-15-06391 (V.K.) and No. PHY-14-01788
(I.I.F.).
NR 50
TC 1
Z9 1
U1 2
U2 10
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9926
EI 2469-9934
J9 PHYS REV A
JI Phys. Rev. A
PD MAR 10
PY 2016
VL 93
IS 3
AR 032706
DI 10.1103/PhysRevA.93.032706
PG 8
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA DG0BK
UT WOS:000371726700004
ER
PT J
AU Basun, SA
Evans, DR
AF Basun, S. A.
Evans, D. R.
TI Identification of the specific Fe centers and associated defect
structure responsible for enhanced dynamic holography in photorefractive
KNbO3:Fe
SO PHYSICAL REVIEW B
LA English
DT Article
ID ELECTRON-PARAMAGNETIC-RESONANCE; DOPED LITHIUM-NIOBATE; REDUCED KNBO3;
ORTHORHOMBIC KNBO3; PHASE-CONJUGATION; TEMPERATURE-DEPENDENCE;
OPTICAL-PROPERTIES; POTASSIUM NIOBATE; CRYSTALS; PHOTOCURRENTS
AB A multifaceted approach is used to identify the Fe centers associated with KNbO3:Fe, determine the location of energy levels, and conclude which centers play a vital role in the photorefractive effect; with such an understanding, the physical parameters may be modified to provide mature materials for dynamic holographic applications. A correlated study is performed on as-grown and reduced KNbO3:Fe crystals, where a uniform reduction is achieved through a modified electroreduction process. This investigation identifies which Fe centers are reduced and which are unaffected, allowing the existence of both charge donors and acceptors as required for photorefraction, resulting in significant improvements of the photorefractive properties. Available charge transitions as a function of photon energy are identified and associated with conditions necessary for major improvements in beam-coupling efficiencies and response times. The understanding of the dynamics and defect structure is supported by photorefractive beam-coupling data. A revised explanation of the photorefractive dynamics is given as this understanding of the defects in KNbO3:Fe is no longer described by the commonly used standard model. This new fundamental understanding that enables the development of improved materials for dynamic holographic applications may also be transferred to other materials classes for disparate applications.
C1 [Basun, S. A.; Evans, D. R.] US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Basun, S. A.] Azimuth Corp, 4134 Linden Ave,Suite 300, Dayton, OH 45431 USA.
RP Evans, DR (reprint author), US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM dean.evans@us.af.mil
NR 56
TC 1
Z9 1
U1 8
U2 16
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9950
EI 2469-9969
J9 PHYS REV B
JI Phys. Rev. B
PD MAR 10
PY 2016
VL 93
IS 9
AR 094102
DI 10.1103/PhysRevB.93.094102
PG 12
WC Physics, Condensed Matter
SC Physics
GA DG0CZ
UT WOS:000371731200001
ER
PT J
AU Che, J
Park, K
Grabowski, CA
Jawaid, A
Kelley, J
Koerner, H
Vaia, RA
AF Che, Justin
Park, Kyoungweon
Grabowski, Christopher A.
Jawaid, Ali
Kelley, John
Koerner, Hilmar
Vaia, Richard A.
TI Preparation of Ordered Monolayers of Polymer Grafted Nanoparticles:
Impact of Architecture, Concentration, and Substrate Surface Energy
SO MACROMOLECULES
LA English
DT Article
ID ATOMIC-FORCE MICROSCOPE; GLASS-TRANSITION TEMPERATURE; THIN-FILMS;
CONTROLLED THICKNESS; RADICAL POLYMERIZATION; RAPID DEPOSITION;
PARTICLE-SIZE; NANOCOMPOSITES; BEHAVIOR; SUPERLATTICES
AB Rapid fabrication of large area, ordered assemblies of polymer grafted (hairy) nanoparticles (PGNs) will enable additive manufacturing of novel membrane, electronic, and photonic elements. Herein, we discuss the relationship between select processing conditions, substrate surface energy, and canopy architecture on the hierarchical structure of sub- to monolayer PGN assemblies. Varying concentrations (10, 20, and 70 nM) of polystyrene (PS) grafted (sigma similar to 1 chain/nm(2)) gold nanoparticles (AuNP, r(0) = 9 nm) were flow coated onto surface-modified silicon wafers (gamma(s) similar to 20 mN/m, hydrophobic to 80 mN/m, hydrophilic). The profile of an isolated gold-polystyrene (PS) PGN depends on substrate-canopy interface energy. At low substrate-PS interface energy (20 mN/m), the PS canopy spreads to maximize contact with the surface, whereas at high substrate-PS interface energy (80 mN/m), the chains minimize contact area resulting in a more compact, thicker PGN corona. This behavior is translated up to monolayer assemblies, where rougher, less-ordered assemblies with smaller AuNP-surface separation form on substrates with low interface energy. These films are also thinner with greater Au volume fraction, indicating that the segment density within the PS canopy depends on substrate surface energy. The impact of these processing parameters on PGN film formation parallels classic colloidal deposition even though the PS concentration is within the Landau-Levich regime for film formation from linear chains. The factors influencing local morphology, however, resemble those that affect polymer thin films. Using this understanding, we demonstrate fabrication within seconds of large area monolayer films with close-packed order.
C1 [Che, Justin; Park, Kyoungweon; Grabowski, Christopher A.; Jawaid, Ali; Kelley, John; Koerner, Hilmar; Vaia, Richard A.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Che, Justin] CNR, Washington, DC 20001 USA.
[Park, Kyoungweon; Grabowski, Christopher A.; Jawaid, Ali; Kelley, John] UES Inc, Dayton, OH 45432 USA.
RP Vaia, RA (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM richard.vaia@us.af.mil
FU Air Force Office of Scientific Research (AFOSR); Air Force Research
Laboratory Materials & Manufacturing Directorate (AFRL/RX); National
Research Council (NRC); Office of Science, Office of Basic Energy
Sciences, of the U.S. Department of Energy [DE-AC02-05CH11231]
FX The authors thank the Air Force Office of Scientific Research (AFOSR),
Air Force Research Laboratory Materials & Manufacturing Directorate
(AFRL/RX), and National Research Council (NRC) for their financial
support. We also thank Dr. Alexander Hexemer, Mr. Eric Schaible, and Dr.
Chenhui Zhu for guidance, setup, and data collection at beamline 7.3.3
at Advanced Light Source/Lawrence Berkeley National Laboratory. The
Advanced Light Source is supported by the Director of the Office of
Science, Office of Basic Energy Sciences, of the U.S. Department of
Energy under Contract DE-AC02-05CH11231.
NR 91
TC 2
Z9 2
U1 11
U2 44
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0024-9297
EI 1520-5835
J9 MACROMOLECULES
JI Macromolecules
PD MAR 8
PY 2016
VL 49
IS 5
BP 1834
EP 1847
DI 10.1021/acs.macromol.5b02722
PG 14
WC Polymer Science
SC Polymer Science
GA DG1TT
UT WOS:000371851100036
ER
PT J
AU Leuty, GM
Tsige, M
Grest, GS
Rubinstein, M
AF Leuty, Gary M.
Tsige, Mesfin
Grest, Gary S.
Rubinstein, Michael
TI Tension Amplification in Tethered Layers of Bottle-Brush Polymers
SO MACROMOLECULES
LA English
DT Article
ID MOLECULAR-DYNAMICS SIMULATIONS; HUMAN BLOOD-PLASMA;
COMPUTER-SIMULATIONS; BRANCHED POLYMERS; BLOCK-COPOLYMERS;
MACROMOLECULES; ADSORPTION; SURFACES; POLYELECTROLYTES; LUBRICATION
AB Molecular dynamics simulations of a coarse-grained bead spring model have been used to study the effects of molecular crowding on the accumulation of tension in the backbone of bottle-brush polymers tethered to a flat substrate. The number of bottle -brushes per unit surface area, Sigma, as well as the lengths of the bottle-brush backbones N-bb (so <= N-bb <= 200) and side chains N-sc (50 <= N-sc <= 200) were varied to determine how the dimensions and degree of crowding of bottle -brushes give rise to bond tension amplification along the backbone, especially near the substrate. From these simulations, we have identified three separate regimes of tension. For low Sigma, the tension is due solely to intramolecular interactions and is dominated by the side chain repulsion that governs the lateral brush dimensions. With increasing Sigma, the interactions between bottle-brush polymers induce compression of the side chains, transmitting increasing tension to the backbone. For large Sigma, intermolecular side chain repulsion increases, forcing side chain extension and reorientation in the direction normal to the surface and transmitting considerable tension to the backbone.
C1 [Leuty, Gary M.; Tsige, Mesfin] Univ Akron, Dept Polymer Sci, Akron, OH 44325 USA.
[Grest, Gary S.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Rubinstein, Michael] Univ N Carolina, Dept Chem, Chapel Hill, NC 27599 USA.
[Leuty, Gary M.] US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Leuty, GM; Tsige, M (reprint author), Univ Akron, Dept Polymer Sci, Akron, OH 44325 USA.; Leuty, GM (reprint author), US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM gary.leuty.ctr@us.af.mil; mtsige@uakron.edu
FU National Science Foundation [DMR-1410290, DMR-1309892, DMR-1436201,
DMR-1121107]; National Institutes of Health [1-P01-HL108808,
1-UH2-HL123645]; Cystic Fibrosis Foundation; U.S. Department of Energy
National Nuclear Security Administration [DE-AC04-94AL85000]
FX This work was supported by the National Science Foundation
(DMR-1410290). M.R acknowledges financial support from the National
Science Foundation under Grants DMR-1309892, DMR-1436201, and
DMR-1121107, the National Institutes of Health under 1-P01-HL108808 and
1-UH2-HL123645, and the Cystic Fibrosis Foundation. This work was
performed, in part, at the Center for Integrated Nanotechnologies, a
U.S. Department of Energy Office of Basic Energy Sciences user facility.
Sandia National Laboratories is a multiprogram laboratory managed and
operated by Sandia Corporation, a wholly owned subsidiary of Lockheed
Martin Corporation, for the U.S. Department of Energy National Nuclear
Security Administration under Contract DE-AC04-94AL85000.
NR 67
TC 1
Z9 1
U1 8
U2 38
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0024-9297
EI 1520-5835
J9 MACROMOLECULES
JI Macromolecules
PD MAR 8
PY 2016
VL 49
IS 5
BP 1950
EP 1960
DI 10.1021/acs.macromol.5602305
PG 11
WC Polymer Science
SC Polymer Science
GA DG1TT
UT WOS:000371851100048
PM 27695137
ER
PT J
AU Lu, J
Luna, E
Aoki, T
Steenbergen, EH
Zhang, YH
Smith, DJ
AF Lu, Jing
Luna, Esperanza
Aoki, Toshihiro
Steenbergen, Elizabeth H.
Zhang, Yong-Hang
Smith, David J.
TI Evaluation of antimony segregation in InAs/InAs1-xSbx type-II
superlattices grown by molecular beam epitaxy
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID SURFACE SEGREGATION; STRAIN FIELDS; X-RAY; ATOMS
AB InAs/InAs1-xSbx type II superlattices designed for mid-wavelength infrared photo-detection have been studied using several electron microscopy methods, with specific attention directed towards interface chemical diffusion caused by Sb segregation. Reciprocal-space image analysis using the geometric phase method showed asymmetric interfacial strain profiles at the InAs-on-InAsSb interface. Measurement of local Sb compositional profiles across the superlattices using electron energy-loss spectroscopy and 002 dark-field imaging confirmed asymmetric Sb distribution, with the InAs-on-InAsSb interface being chemically graded. In contrast, the InAsSb-on-InAs interface showed a small intrinsic interface width. Careful evaluation of the experimental Sb composition profiles using a combined segregation and sigmoidal model reached quantitative agreement. Segregation dominated over the sigmoidal growth at the InAs-on-InAsSb interface, and the segregation probability of 0.81 +/- 0.01 obtained from the two microscopy techniques agreed well within experimental error. Thus, 81% of Sb atoms from the topmost layers segregated into the next layer during growth causing the interfaces to be broadened over a length of similar to 3 nm. This strong Sb segregation occurred throughout the whole superlattice stack, and would likely induce undesirable effects on band-gap engineering, such as blue-shift or broadening of the optical response, as well as weakened absorption. (C) 2016 AIP Publishing LLC.
C1 [Lu, Jing; Steenbergen, Elizabeth H.; Zhang, Yong-Hang; Smith, David J.] Arizona State Univ, Ctr Photon Innovat, Tempe, AZ 85287 USA.
[Lu, Jing] Arizona State Univ, Sch Engn Matter Transport & Energy, Tempe, AZ 85287 USA.
[Luna, Esperanza] Paul Drude Inst Solid State Elect, D-10117 Berlin, Germany.
[Aoki, Toshihiro] Arizona State Univ, LeRoy Eyring Ctr Solid State Sci, Tempe, AZ 85287 USA.
[Steenbergen, Elizabeth H.; Zhang, Yong-Hang] Arizona State Univ, Sch Elect Comp & Energy Engn, Tempe, AZ 85287 USA.
[Smith, David J.] Arizona State Univ, Dept Phys, Tempe, AZ 85287 USA.
[Steenbergen, Elizabeth H.] US Air Force, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
RP Lu, J (reprint author), Arizona State Univ, Ctr Photon Innovat, Tempe, AZ 85287 USA.; Lu, J (reprint author), Arizona State Univ, Sch Engn Matter Transport & Energy, Tempe, AZ 85287 USA.
EM jinglu2@asu.edu
OI Lu, Jing/0000-0002-8866-9926
FU MURI [W911NF-10-1-0524]
FX The authors gratefully acknowledge the support from MURI Grant No.
W911NF-10-1-0524 and the use of facilities in the John M. Cowley Center
for High Resolution Electron Microscopy at Arizona State University. We
thank Amy Liu at IQE for growth of samples and Z.-Y. Lin for insightful
discussions.
NR 28
TC 3
Z9 3
U1 11
U2 22
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-8979
EI 1089-7550
J9 J APPL PHYS
JI J. Appl. Phys.
PD MAR 7
PY 2016
VL 119
IS 9
AR 095702
DI 10.1063/1.4942844
PG 7
WC Physics, Applied
SC Physics
GA DG8RS
UT WOS:000372351900070
ER
PT J
AU Rumi, M
Cazzell, SA
Kosa, T
Sukhomlinova, L
Taheri, B
White, TJ
Bunning, TJ
AF Rumi, Mariacristina
Cazzell, Seth A.
Kosa, Tamas
Sukhomlinova, Ludmila
Taheri, Bahman
White, Timothy J.
Bunning, Timothy J.
TI Quantification of photoinduced order increase in liquid crystals with
naphthopyran guests
SO PHYSICAL REVIEW E
LA English
DT Article
ID REFRACTIVE-INDEXES; PHASE-TRANSITIONS; PHOTOCHROMIC COMPOUNDS; SYSTEMS;
MIXTURES; BEHAVIOR; LENSES
AB Photoinduced order-increasing phase transitions can occur in dye-liquid crystal mixtures when the photoproduct of the excitation of the dye molecules is more compatible with the liquid crystalline medium than the initial dye species. A detailed investigation of the photoinduced changes of the phase behavior and optical properties of mixtures of liquid crystals with naphthopyran guests upon exposure to light at 365 nm is presented here. In these guest-host systems, the nematic-to-isotropic phase transition temperature is increased upon irradiation. We show that the nematic range can be extended up to 2.9 degrees C by illumination in 5CB (4-n-pentyl-4'-cyanobiphenyl) liquid crystal mixtures. The order parameter is significantly increased by illumination at all temperatures within the nematic range and the changes are larger at higher concentrations of the guests. In particular, the illuminated guest-host mixtures exhibit order parameters close to those of the neat liquid crystal host at the same temperature relative to the clearing point. An improved understanding of the photophysical processes taking place at the molecular level in these material systems can inform the design of photoresponsive materials and enhance their potential utility in optical or photonic devices.
C1 [Rumi, Mariacristina; Cazzell, Seth A.; White, Timothy J.; Bunning, Timothy J.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Rumi, Mariacristina; Cazzell, Seth A.] Azimuth Corp, 4027 Colonel Glenn Highway,Suite 230, Beavercreek, OH 45431 USA.
[Kosa, Tamas; Sukhomlinova, Ludmila; Taheri, Bahman] Alpha Micron Inc, 1950 State Route 59, Kent, OH 44240 USA.
RP White, TJ; Bunning, TJ (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM timothy.white.24@us.af.mil; timothy.bunning@us.af.mil
RI Rumi, Mariacristina/C-9474-2009;
OI Rumi, Mariacristina/0000-0002-4597-9617; /0000-0001-6220-0436
FU Air Force Office of Scientific Research; Materials and Manufacturing
Directorate of the Air Force Research Laboratory
FX This work was supported by the Air Force Office of Scientific Research
and the Materials and Manufacturing Directorate of the Air Force
Research Laboratory.
NR 41
TC 1
Z9 1
U1 2
U2 14
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2470-0045
EI 2470-0053
J9 PHYS REV E
JI Phys. Rev. E
PD MAR 7
PY 2016
VL 93
IS 3
AR 032701
DI 10.1103/PhysRevE.93.032701
PG 9
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA DG0GZ
UT WOS:000371744600019
PM 27078421
ER
PT J
AU Jarrett, JW
Zhao, T
Johnson, JS
Liu, XY
Nealey, PF
Vaia, RA
Knappenberger, KL
AF Jarrett, Jeremy W.
Zhao, Tian
Johnson, Jeffrey S.
Liu, Xiaoying
Nealey, Paul F.
Vaia, Richard A.
Knappenberger, Kenneth L., Jr.
TI Plasmon-Mediated Two-Photon Photoluminescence-Detected Circular
Dichroism in Gold Nanosphere Assemblies
SO JOURNAL OF PHYSICAL CHEMISTRY LETTERS
LA English
DT Article
ID NANOPARTICLES; NANOSTRUCTURES; AMPLIFICATION; SPECTROSCOPY; CHIRALITY;
NANORODS; ARRAYS; DIMERS
AB We report plasmon-mediated two-photon photoluminescence (TPPL)-detected circular dichroism (CD) from colloidal metal nanoparticle assemblies. Two classes of solid gold nanosphere (SGN) dimers-heterodimers and homodimers-were examined using polarization-resolved TPPL, second harmonic generation (SHG), and one-photon photoluminescence (OPPL). Unambiguous CD was detected in both the TPPL and SHG signals, and the magnitudes of the CD responses in these measurements showed agreement for individual nanostructures. Heterodimers gave larger CD responses (average TPPL-CDR = 0.62 +/- 0.33; average SHG-CDR = 0.51 +/- 0.21) than homodimers (average TPPL-CDR = 0.19 +/- 0.04; average SHG-CDR = 0.18 +/- 0.06). OPPL-CD was not detected for either structure. Analysis of dimer emission properties suggested the CD responses were determined by properties of the one-photon-resonant mode excited by the laser. Average TPPL signals were (4.3 +/- 0.6)x larger than those for SHG. Because signal amplitude is a primary determinant for spatial accuracies and precisions obtained from optical microscopy, CD contrast generated from plasmon-mediated TPPL, which we report for the first time, can extend the suite of super-resolution imaging techniques.
C1 [Jarrett, Jeremy W.; Zhao, Tian; Johnson, Jeffrey S.; Knappenberger, Kenneth L., Jr.] Florida State Univ, Dept Chem & Biochem, Tallahassee, FL 32306 USA.
[Liu, Xiaoying; Nealey, Paul F.] Univ Chicago, Inst Mol Engn, Chicago, IL 60637 USA.
[Vaia, Richard A.] US Air Force, Res Lab, 2941 Hobson Way, Wright Patterson AFB, OH 45433 USA.
RP Knappenberger, KL (reprint author), Florida State Univ, Dept Chem & Biochem, Tallahassee, FL 32306 USA.
EM kknappenberger@fsu.edu
OI Jarrett, Jeremy/0000-0003-1308-1519
FU Air Force Office of Scientific Research [FA9550-15-1-0114]
FX This research was supported by a grant from the Air Force Office of
Scientific Research, Grant Number FA9550-15-1-0114.
NR 28
TC 1
Z9 2
U1 16
U2 31
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1948-7185
J9 J PHYS CHEM LETT
JI J. Phys. Chem. Lett.
PD MAR 3
PY 2016
VL 7
IS 5
BP 765
EP 770
DI 10.1021/acs.jpclett.5b02621
PG 6
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary; Physics, Atomic, Molecular & Chemical
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA DF7US
UT WOS:000371563700006
PM 26854357
ER
PT J
AU Harnish, DA
Heimbuch, BK
Balzli, C
Choe, M
Lumley, AE
Shaffer, RE
Wander, JD
AF Harnish, Delbert A.
Heimbuch, Brian K.
Balzli, Charles
Choe, Melanie
Lumley, April E.
Shaffer, Ronald E.
Wander, Joseph D.
TI Capture of 0.1-mu m aerosol particles containing viable H1N1 influenza
virus by N95 filtering facepiece respirators
SO JOURNAL OF OCCUPATIONAL AND ENVIRONMENTAL HYGIENE
LA English
DT Article
DE Bioaerosol; disease transmission; H1N1; infection; N95 respirator;
respiratory
AB Nosocomial infections pose an escalating threat to both patients and healthcare workers (HCWs). A widely recommended device for individual respiratory protection, the N95 filtering facepiece respirator (FFR) has been shown to provide efficient filtration of inert particles larger and smaller than the nominal most-penetrating particle size (MPPS) range, 0.03-0.3 mu m. Humans generate respiratory aerosols in the MPPS range, suggesting that short-range disease transmission could occur via small infectious particles. Data presented here show that the N95 FFR will afford a significant measure of protection against infectious particles as small as a bare H1N1 influenza virion, and that the capture mechanism does not discriminate in favor of, or against, biological particles.
C1 [Harnish, Delbert A.; Heimbuch, Brian K.] Applied Res Associates, Panama City, FL USA.
[Balzli, Charles; Lumley, April E.] Universal Technol Corp, Beavercreek, OH USA.
[Choe, Melanie] US Dept HHS, Off Assistant Secretary Preparedness & Response, Biomed Adv Res & Dev Author, Washington, DC 20201 USA.
[Shaffer, Ronald E.] NIOSH, Pittsburgh, PA USA.
[Wander, Joseph D.] US Air Force, Res Lab, Tyndall AFB, FL 32403 USA.
RP Wander, JD (reprint author), US Air Force, Res Lab, 139 Barnes Dr,Suite 2, Tyndall AFB, FL 32403 USA.
EM joseph.wander@us.af.mil
FU U.S. Department of Health and Human Services (HHS); Office of Assistant
Secretary for Preparedness and Response (ASPR); Biomedical Advanced
Research and Development Authority (BARDA); Air Force Research
Laboratory (AFRL)
FX This work was funded by the U.S. Department of Health and Human Services
(HHS), the Office of Assistant Secretary for Preparedness and Response
(ASPR), Biomedical Advanced Research and Development Authority (BARDA)
through an interagency agreement with the Air Force Research Laboratory
(AFRL).
NR 9
TC 1
Z9 1
U1 1
U2 11
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 530 WALNUT STREET, STE 850, PHILADELPHIA, PA 19106 USA
SN 1545-9624
EI 1545-9632
J9 J OCCUP ENVIRON HYG
JI J. Occup. Environ. Hyg.
PD MAR 3
PY 2016
VL 13
IS 3
BP D46
EP D49
DI 10.1080/15459624.2015.1116698
PG 4
WC Environmental Sciences; Public, Environmental & Occupational Health
SC Environmental Sciences & Ecology; Public, Environmental & Occupational
Health
GA DB4DG
UT WOS:000368462300001
PM 26554291
ER
PT J
AU Detzi, D
Winkleman, S
AF Detzi, Daniel
Winkleman, Steven
TI Hitting Them Where it Hurts: A Joint Interagency Network to Disrupt
Terrorist Financing in West Africa
SO STUDIES IN CONFLICT & TERRORISM
LA English
DT Article
AB Illicit trafficking networks in West Africa are a major funding source for violent extremist groups in the region. Although the United States has formed interagency constructs in the Caribbean and in Europe to counter illicit trafficking, there is a gap in West Africa. The corridor of smuggling routes from the shores of West Africa into North Africa provides extremist groups with the financing they need to continue their activities. By forming a third interagency organization in West Africa, the United States and its partners could strike a significant blow to violent extremist groups, which continue to threaten U.S. interests in the region.
C1 [Detzi, Daniel] US Air Force Acad, Polit Sci, Colorado Springs, CO USA.
[Winkleman, Steven] Def Intelligence Agcy, Amer Ctr, Washington, DC USA.
RP Detzi, D (reprint author), USAF Acad, 2354 Fairchild Dr,Suite 6K-164, Colorado Springs, CO 80840 USA.
EM daniel.detzi@usafa.edu
NR 23
TC 1
Z9 1
U1 2
U2 5
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 530 WALNUT STREET, STE 850, PHILADELPHIA, PA 19106 USA
SN 1057-610X
EI 1521-0731
J9 STUD CONFL TERROR
JI Stud. Confl. Terror.
PD MAR 3
PY 2016
VL 39
IS 3
BP 227
EP 239
DI 10.1080/1057610X.2015.1099994
PG 13
WC International Relations; Political Science
SC International Relations; Government & Law
GA DB5AD
UT WOS:000368524000003
ER
PT J
AU Bag, S
Durstock, MF
AF Bag, Santanu
Durstock, Michael F.
TI Large Perovskite Grain Growth in Low-Temperature Solution-Processed
Planar p-i-n Solar Cells by Sodium Addition
SO ACS APPLIED MATERIALS & INTERFACES
LA English
DT Article
DE sodium additive; large grain; solution-processing; PEDOT surface;
perovskite solar cell
ID ORGANOMETAL HALIDE PEROVSKITE; THIN-FILM; HYSTERESIS
AB Thin-film p-i-n type planar heterojunction perovskite solar cells have the advantage of full low temperature solution processability and can, therefore, be adopted in roll-to-roll production and flexible devices. One of the main challenges with these devices, however, is the ability to finely control the. film morphology during the deposition and crystallization of the perovskite layer. Processes suitable for optimization of the perovskite layer film morphology with large grains are highly desirable for reduced recombination of charge carriers. Here, we show how uniform thin films with micron size perovskite grains can be made through the use of a controlled amount of sodium ions in the precursor solution. Large micrometer-size CH3NH3PbI3 perovskite grains are formed during low-temperature thin-film growth by adding sodium ions to the PbI2 precursor solution in a two-step interdiffusion process. By adjusting additive concentration, film morphologies were optimized and the fabricated p-i-n planar perovskite-PCBM solar cells showed improved. power conversion efficiences (an average of 3-4% absolute efficiency enhancement) compared to the nonsodium based devices. Overall, the additive enhanced grain growth process helped to reach a high 14.2% solar cell device efficiency with low hysteresis. This method of grain growth is quite general and provides a facile way to fabricate large-grained CH3NH3PbI3 on any arbitrary surface by an all solution-processed route.
C1 [Bag, Santanu; Durstock, Michael F.] US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Bag, Santanu] CNR, Washington, DC 20418 USA.
RP Bag, S; Durstock, MF (reprint author), US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.; Bag, S (reprint author), CNR, Washington, DC 20418 USA.
EM santanu.bag.ctr.in@us.af.mil; michael.durstock@us.af.mil
FU Air Force Office of Scientific Research (AFSOR)
FX This work was supported by the Air Force Office of Scientific Research
(AFSOR).
NR 29
TC 9
Z9 9
U1 32
U2 155
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1944-8244
J9 ACS APPL MATER INTER
JI ACS Appl. Mater. Interfaces
PD MAR 2
PY 2016
VL 8
IS 8
BP 5053
EP 5057
DI 10.1021/acsami.5b11494
PG 5
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
SC Science & Technology - Other Topics; Materials Science
GA DF6GJ
UT WOS:000371453600001
PM 26862869
ER
PT J
AU Blake, AJ
Kohlmeyer, RR
Drummy, LF
Gutierrez-Kolar, JS
Carpena-Nunez, J
Maruyama, B
Shahbazian-Yassar, R
Huang, H
Durstockt, MF
AF Blake, Aaron J.
Kohlmeyer, Ryan R.
Drummy, Lawrence F.
Gutierrez-Kolar, Jacob S.
Carpena-Nunez, Jennifer
Maruyama, Benji
Shahbazian-Yassar, Reza
Huang, Hong
Durstockt, Michael F.
TI Creasable Batteries: Understanding Failure Modes through Dynamic
Electrochemical Mechanical Testing
SO ACS APPLIED MATERIALS & INTERFACES
LA English
DT Article
DE carbon nanotube current collectors; Li-ion battery; bendable battery;
creasable battery; in situ mechanical testing
ID LITHIUM-ION BATTERIES; CURRENT COLLECTORS; PAPER; ENERGY; THIN;
TECHNOLOGIES; CHALLENGES; DENSITY; SYSTEMS; ANODES
AB Thin-film batteries that can be folded, bent, and even repeatedly creased with minimal or no loss in electrochemical performance have been demonstrated and systematically evaluated using two dynamic mechanical testing approaches for either controlled bending or creasing of flexible devices. The results show that mechanically robust and flexible Li-ion batteries (Li4Ti5O12//LiFePO4) based on the use of a nonwoven multiwalled carbon nanotube (MWNT) mat as a current collector (CC) exhibited a 14-fold decrease in voltage fluctuation at a bending strain of 4.2%, as compared to cells using traditional metal foil CCs. More importantly, MWNT-based full-cells exhibited excellent mechanical integrity through 288 crease cycles, whereas the foil full-cell exhibited continuously degraded performance with each fold and catastrophic fracture after only 94 folds. The MWNT CCs can be attributed to excellent interfacial properties as well as high mechanical strength coupled with compliancy, which allow the batteries to easily conform during mechanical abuse. These results quantitatively demonstrate the substantial enhancement offered in both mechanical and electrochemical stability which can be realized with traditional processing approaches when an appropriate choice of a flexible and robust CC is utilized.
C1 [Blake, Aaron J.; Kohlmeyer, Ryan R.; Drummy, Lawrence F.; Carpena-Nunez, Jennifer; Maruyama, Benji; Durstockt, Michael F.] US Air Force, Res Lab, Soft Mat Branch, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Blake, Aaron J.; Huang, Hong] Wright State Univ, Dept Mech & Mat Engn, Dayton, OH 45435 USA.
[Kohlmeyer, Ryan R.; Carpena-Nunez, Jennifer] CNR, Washington, DC 20001 USA.
[Gutierrez-Kolar, Jacob S.; Shahbazian-Yassar, Reza] Michigan Technol Univ, Dept Mech Engn Engn Mech, Houghton, MI 49931 USA.
RP Durstockt, MF (reprint author), US Air Force, Res Lab, Soft Mat Branch, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.; Kohlmeyer, RR (reprint author), CNR, Washington, DC 20001 USA.
EM ryan.kohlmeyer.ctr@us.af.mil; michael.durstock@us.af.mil
FU National Research Council; Air Force Summer Faculty Fellowship; National
Science Foundation [CMMI-1200383]; American Chemical Society-Petroleum
Research Fund [51458-ND10]
FX We thank Dr. Mark Schauer and Nanocomp Technologies, Inc. for providing
the MVVNT mat and for valuable technical discussions. R.R.K. and J.C.-N.
thank the National Research Council for the Postdoctoral Fellowships.
R.S.Y and J.S.G.K. acknowledge financial support from the Air Force
Summer Faculty Fellowship, the National Science Foundation (Award No.
CMMI-1200383), and the American Chemical Society-Petroleum Research Fund
(Award No. 51458-ND10).
NR 35
TC 0
Z9 0
U1 11
U2 36
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1944-8244
J9 ACS APPL MATER INTER
JI ACS Appl. Mater. Interfaces
PD MAR 2
PY 2016
VL 8
IS 8
BP 5196
EP 5204
DI 10.1021/acsami.5b11175
PG 9
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
SC Science & Technology - Other Topics; Materials Science
GA DF6GJ
UT WOS:000371453600016
PM 26741734
ER
PT J
AU Youngquist, RC
Nurge, MA
Starr, SO
Leve, FA
Peck, M
AF Youngquist, Robert C.
Nurge, Mark A.
Starr, Stanley O.
Leve, Frederick A.
Peck, Mason
TI A slowly rotating hollow sphere in a magnetic field: First steps to
de-spin a space object
SO AMERICAN JOURNAL OF PHYSICS
LA English
DT Article
ID DEBRIS
AB Modeling the interaction of a slowly rotating hollow conducting sphere in a magnetic field provided an understanding of the dynamics of orbiting space objects moving through the Earth's magnetic field. This analysis, performed in the late 1950s and limited to uniform magnetic fields, was innovative and acknowledged the pioneers who first observed rotary magnetism, in particular, the seminal work of Hertz in 1880. Now, there is interest in using a magnetic field produced by one space object to stop the spin of a second object so that docking can occur. In this paper, we consider, yet again, the interaction of a rotating hollow sphere in a magnetic field. We show that the predicted results can be tested experimentally, making this an interesting advanced student project. This analysis also sheds light on a rich set of previously unaddressed behaviors involving eddy currents. (C) 2016 American Association of Physics Teachers.
C1 [Youngquist, Robert C.; Nurge, Mark A.; Starr, Stanley O.] NASA, Mail Code UBR3, Kennedy Space Ctr, FL 32899 USA.
[Leve, Frederick A.] Air Force Res Lab, Kirtland AFB, NM 87117 USA.
[Peck, Mason] Cornell Univ, Sibley Sch Mech & Aerosp Engn, 208 Upson Hall,124 Hoy Rd, Ithaca, NY 14853 USA.
RP Nurge, MA (reprint author), NASA, Mail Code UBR3, Kennedy Space Ctr, FL 32899 USA.
EM Robert.C.Yougquist@nasa.gov; Mark.A.Nurge@nasa.gov;
Stanley.O.Starr@nasa.gov; frederick.leve@us.af.mil; mp336@cornell.edu
NR 23
TC 0
Z9 0
U1 1
U2 1
PU AMER ASSOC PHYSICS TEACHERS
PI COLLEGE PARK
PA ONE PHYSICS ELLIPSE, COLLEGE PARK, MD 20740-3845 USA
SN 0002-9505
EI 1943-2909
J9 AM J PHYS
JI Am. J. Phys.
PD MAR
PY 2016
VL 84
IS 3
BP 181
EP 191
DI 10.1119/1.4936633
PG 11
WC Education, Scientific Disciplines; Physics, Multidisciplinary
SC Education & Educational Research; Physics
GA DX9SF
UT WOS:000384734700002
ER
PT J
AU Zhang, HL
Cole, Y
Ge, LQ
Wei, SX
Yu, W
Lu, C
Chen, GS
Shen, D
Blasch, E
Pham, KD
AF Zhang, Hanlin
Cole, Yevgeniy
Ge, Linqiang
Wei, Sixiao
Yu, Wei
Lu, Chao
Chen, Genshe
Shen, Dan
Blasch, Erik
Pham, Khanh D.
TI ScanMe Mobile: A Cloud-based Android Malware Analysis Service
SO APPLIED COMPUTING REVIEW
LA English
DT Article
DE Android Malware; Google Cloud Messaging; Machine Learning; Sandbox;
Google App Engine
AB As mobile malware have increased in number and sophistication, it has become pertinent for users to have tools that can inform them of potentially malicious applications. To fulfill this need, we develop a cloud-based malware analysis service called ScanMe Mobile, for the Android platform. The objective of this service is to provide users with detailed information about Android Application Package (APK) files before installing them on their devices. With ScanMe Mobile, users are able to upload APK files from their device SD card, scan the APK in the malware detection system that could be deployed in the cloud, compile a comprehensive report, and store or share the report by publishing it to the website. ScanMe Mobile works by running the APK in a virtual sandbox to generate permission data, and analyzes the result in the machine learning detection system. Through our experimental results, we demonstrate that the proposed system can effectively detect malware on the Android platform.
C1 [Zhang, Hanlin; Ge, Linqiang; Yu, Wei] Towson Univ, Dept Comp & Informat Sci, 7800 York Rd, Towson, MD 21252 USA.
[Cole, Yevgeniy] Towson Univ, 7800 York Rd, Towson, MD 21252 USA.
[Wei, Sixiao; Chen, Genshe; Shen, Dan] Intelligent Fus Technol, 20271 Goldenrod Ln, Germantown, MD USA.
[Lu, Chao] Towson Univ, Comp Sci, 7800 York Rd, Towson, MD USA.
[Blasch, Erik] Air Force Res Lab, Wright Patterson AFB, OH USA.
[Pham, Khanh D.] Air Force Res Lab, Space Vehicles Directorate, Wright Patterson AFB, OH USA.
RP Zhang, HL (reprint author), Towson Univ, Dept Comp & Informat Sci, 7800 York Rd, Towson, MD 21252 USA.
EM hzhang4@students-.towson.edu; ycolecs@gmail.com;
lge2@students-.towson.edu; sixiao.wei@intfusiontech.com;
wyu2@.towson.edu; clu@.towson.edu; gchen@intfusiontech.com;
dshen@intfusiontech.com; rik.blasch@gmail.com; khanh.pham.1@us.af.mil
NR 36
TC 0
Z9 0
U1 4
U2 4
PU ASSOC COMPUTING MACHINERY
PI NEW YORK
PA 2 PENN PLAZA, STE 701, NEW YORK, NY 10121-0701 USA
SN 1559-6915
J9 APPL COMPUT REV
JI Appl. Comput. Rev.
PD MAR
PY 2016
VL 16
IS 1
BP 36
EP 49
DI 10.1145/2811411.2811483
PG 14
WC Computer Science, Information Systems
SC Computer Science
GA DV1AA
UT WOS:000382650900004
ER
PT J
AU Kuhn, KM
Gienger, CM
Tracy, CR
AF Kuhn, Kellie M.
Gienger, C. M.
Tracy, C. Richard
TI SMALL MAMMALS OF PYRAMID LAKE AND ANAHO ISLAND (NEVADA)
SO SOUTHWESTERN NATURALIST
LA English
DT Article
ID AMERICAN WHITE PELICAN; BODY-SIZE; EVOLUTION; DIVERGENCE; RULE
AB We report on a survey of the small mammal communities of Anaho Island and the mainland surrounding Pyramid Lake in the Great Basin of western Nevada. Ten rodent species were detected on the mainland, but only the deer mouse (Peromyscus maniculatus) was detected on Anaho Island. Although the mean abundance of deer mice on the Pyramid Lake mainland was more than double that of Anaho Island (12.5 +/- 10.1 individuals per trap grid compared with 5.0 +/- 3.4 individuals per trap grid), we did not detect a significant difference between locations. Deer mice on Anaho Island were significantly larger in body size (mean body length = 86 +/- 4 mm) than mainland mice (mean = 75 +/- 7 mm), but it is unclear what mechanisms might have produced the observed divergence in body size.
C1 [Gienger, C. M.] Univ Nevada, Dept Biol, Reno, NV 89557 USA.
Univ Nevada, Program Ecol Evolut & Conservat Biol, Reno, NV 89557 USA.
[Kuhn, Kellie M.] US Air Force Acad, Dept Biol, 2355 Fac Dr,Suite 2P389, Usafa, CO 80840 USA.
[Gienger, C. M.] Austin Peay State Univ, Dept Biol, POB 4718, Clarksville, TN 37044 USA.
[Gienger, C. M.] Austin Peay State Univ, Ctr Excellence Field Biol, POB 4718, Clarksville, TN 37044 USA.
RP Gienger, CM (reprint author), Univ Nevada, Dept Biol, Reno, NV 89557 USA.; Gienger, CM (reprint author), Austin Peay State Univ, Dept Biol, POB 4718, Clarksville, TN 37044 USA.; Gienger, CM (reprint author), Austin Peay State Univ, Ctr Excellence Field Biol, POB 4718, Clarksville, TN 37044 USA.
EM giengerc@apsu.edu
NR 25
TC 0
Z9 0
U1 2
U2 2
PU SOUTHWESTERN ASSOC NATURALISTS
PI SAN MARCOS
PA SOUTHWEST TEXAS STATE UNIV, DEPT BIOLOGY, 601 UNIVERSITY DR, SAN MARCOS,
TX 78666 USA
SN 0038-4909
EI 1943-6262
J9 SOUTHWEST NAT
JI Southw. Natural.
PD MAR
PY 2016
VL 61
IS 1
BP 40
EP 44
PG 5
WC Biodiversity Conservation; Ecology
SC Biodiversity & Conservation; Environmental Sciences & Ecology
GA DO9DL
UT WOS:000378084400006
ER
PT J
AU Howarth, WR
Brochard, K
Campbell, SE
Grogan, BF
AF Howarth, William R.
Brochard, Kevin
Campbell, Scot E.
Grogan, Brian F.
TI Effect of Microfracture on Meniscal Tear Healing in a Goat (Capra
hircus) Model
SO ORTHOPEDICS
LA English
DT Article
ID GROWTH-FACTORS; REPAIR; KNEE; RECONSTRUCTION; TREPHINATION; DEFECTS
AB Meniscal injuries are an extremely common cause of knee pain. Meniscal repairs performed with concomitant anterior cruciate ligament reconstruction appear to heal at a higher rate than meniscal repairs performed in isolation. This may be due in part to the release of marrow elements into the knee and the time of meniscal repair. In cases of isolated meniscal repair, some orthopedic surgeons use microfracture to release marrow elements into the joint as an adjunct to enhance meniscal healing. This study evaluated rates of meniscal tear healing with or without the performance of microfracture in a goat (Capra hircus) model. Forty castrated young adult male goats underwent either a horizontal or a longitudinal 1.0-cm meniscal tear with or without microfracture. All procedures were performed open, in a bloodless field. Meniscal tears were created in the peripheral half of the body of the medial meniscus. The goats were euthanized at 6 months, and meniscal tears were analyzed and classified as complete healing, partial healing, or no healing by direct visualization. A probe was used as an aid to evaluate and classify the meniscal tears. Twenty (87%) of 23 goat meniscal tears showed at least partial healing when performed with concomitant microfracture. Only 5 (29%) of 17 menisci showed any healing in goats that did not receive microfracture. This difference in healing rates was statistically significant (P<.001). Fifteen (65%) meniscal tears accomplished with microfracture were completely healed, whereas only 2 (12%) menisci showed complete healing without microfracture (P<.001). The results of this study suggest that the release of bone marrow elements into the knee by microfracture improves meniscal healing rates.
C1 [Howarth, William R.] US Air Force Acad, Dept Orthoped Surg, Colorado Springs, CO 80840 USA.
[Brochard, Kevin] New England Baptist Hosp, Dept Orthoped Surg, Boston, MA USA.
[Campbell, Scot E.] Landstuhl Reg Med Ctr, Dept Radiol, Landstuhl, Germany.
[Grogan, Brian F.] Carl R Darnall Army Med Ctr, Dept Orthoped & Rehabil, 3600 Darnall Loop, Ft Hood, TX 76544 USA.
RP Grogan, BF (reprint author), Carl R Darnall Army Med Ctr, Dept Orthoped & Rehabil, 3600 Darnall Loop, Ft Hood, TX 76544 USA.
EM brian.f.grogan.mil@mail.mil
FU Wilford Hall Medical Center Institutional Animal Care and Use Committee
(IACUC); US Government
FX This study was funded by the Wilford Hall Medical Center Institutional
Animal Care and Use Committee (IACUC) and the US Government.
NR 34
TC 0
Z9 0
U1 1
U2 2
PU SLACK INC
PI THOROFARE
PA 6900 GROVE RD, THOROFARE, NJ 08086 USA
SN 0147-7447
EI 1938-2367
J9 ORTHOPEDICS
JI Orthopedics
PD MAR-APR
PY 2016
VL 39
IS 2
BP 105
EP 110
DI 10.3928/01477447-20160119-04
PG 6
WC Orthopedics
SC Orthopedics
GA DO1AQ
UT WOS:000377511000044
PM 26811956
ER
PT J
AU Haugan, HJ
Brown, GJ
Olson, BV
Kadlec, EA
Kim, JK
Shaner, EA
AF Haugan, Heather J.
Brown, Gail J.
Olson, Benjamin V.
Kadlec, Emil A.
Kim, Jin K.
Shaner, Eric A.
TI Minority carrier lifetimes in very long-wave infrared InAs/GaInSb
superlattices
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
LA English
DT Article
ID II SUPERLATTICES; DETECTORS
AB Significantly improved carrier lifetimes in very-long wave infrared InAs/GaInSb superlattice (SL) absorbers are demonstrated by using time-resolved microwave reflectance (TMR) measurements. A nominal 47.0 angstrom InAs/21.5 angstrom Ga0.75In0.25Sb SL structure that produces an approximately 25 mu m response at 10 K has a minority carrier lifetime of 140 +/- 20 ns at 18 K, which is markedly long for SL absorber with such a narrow bandgap. This improvement is attributed to the strain-engineered ternary design. Such SL employs a shorter period with reduced gallium in order to achieve good optical absorption and epitaxial advantages, which ultimately leads to the improvements in the minority carrier lifetime by reducing Shockley-Read-Hall (SRH) defects. By analyzing the temperature-dependence of TMR decay data, the recombination mechanisms and trap states that currently limit the performance of this SL absorber have been identified. The results show a general decrease in the long-decay lifetime component, which is dominated by the SRH recombination at temperature below similar to 30 K, and by Auger recombination at temperatures above similar to 45 K. (C) 2016 American Vacuum Society.
C1 [Haugan, Heather J.; Brown, Gail J.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Olson, Benjamin V.; Kadlec, Emil A.; Kim, Jin K.; Shaner, Eric A.] Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
RP Haugan, HJ (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM heather.haugan.ctr@us.af.mil
NR 22
TC 2
Z9 2
U1 6
U2 7
PU A V S AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 1071-1023
J9 J VAC SCI TECHNOL B
JI J. Vac. Sci. Technol. B
PD MAR
PY 2016
VL 34
IS 2
AR 02L104
DI 10.1116/1.4941132
PG 4
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Physics, Applied
SC Engineering; Science & Technology - Other Topics; Physics
GA DN0UU
UT WOS:000376782200012
ER
PT J
AU Carretta, TR
Ree, MJ
Teachout, MS
AF Carretta, Thomas R.
Ree, Malcolm James
Teachout, Mark S.
TI Training Affects Variability in Training Performance Both Within and
Across Jobs
SO INTERNATIONAL JOURNAL OF SELECTION AND ASSESSMENT
LA English
DT Article
ID RANGE RESTRICTION; NORMS
AB A partial test of a model of training performance variability was conducted. The current study examined variability in cognitive ability and training performance in job-specific training. Several studies have found mean score differences in cognitive ability across jobs. Further, the variability in training outcomes among individuals within a job has been shown to vary across jobs. Reduced variability in training outcomes is a measure of training effectiveness. For this study data were grouped by job over several years. Participants were 116,310 enlistees enrolled in 108 US Air Force training specialties. Aptitude was measured by a verbal/math composite derived from the US military enlistment test, the Armed Services Vocational Aptitude Battery. Training performance was assessed by written tests of job-related knowledge content. Predictive validity of the verbal/math composite ranged from .124 to .836 across jobs with a mean weighted value of 0.691. Substantial differences were observed for mean and variability of aptitude across jobs. Trainees in jobs with high aptitude requirements had higher mean aptitude and were less variable on aptitude than those in jobs with lower aptitude requirements. Further, trainees in high aptitude jobs had higher mean training performance scores and were less variable on performance than those in jobs with lower aptitude requirements. Finally, training performance was much less variable than aptitude. Training had the effect of reducing variability among trainees within jobs. This has the effect of producing a more homogenous set of trainees on trained content, which is beneficial to on-the-job training. Support was found for a part of the model.
C1 [Carretta, Thomas R.] Air Force Res Lab, Wright Patterson AFB, OH USA.
[Ree, Malcolm James] Our Lady Lake Univ, San Antonio, TX USA.
[Teachout, Mark S.] Univ Incarnate Word, San Antonio, TX USA.
RP Carretta, TR (reprint author), Air Force Res Lab, Wright Patterson AFB, OH USA.
EM thomas.carretta@us.af.mil
NR 20
TC 1
Z9 1
U1 3
U2 4
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0965-075X
EI 1468-2389
J9 INT J SELECT ASSESS
JI Int. J. Sel. Assess.
PD MAR
PY 2016
VL 24
IS 1
SI SI
BP 71
EP 76
DI 10.1111/ijsa.12131
PG 6
WC Psychology, Applied; Management
SC Psychology; Business & Economics
GA DJ8YE
UT WOS:000374499600009
ER
PT J
AU Selesnick, RS
Baker, DN
Jaynes, AN
Li, X
Kanekal, SG
Hudson, MK
Kress, BT
AF Selesnick, R. S.
Baker, D. N.
Jaynes, A. N.
Li, X.
Kanekal, S. G.
Hudson, M. K.
Kress, B. T.
TI Inward diffusion and loss of radiation belt protons
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID CRRES OBSERVATIONS; ENERGY; WAVES
AB Radiation belt protons in the kinetic energy range 24 to 76 MeV are being measured by the Relativistic Electron Proton Telescope on each of the two Van Allen Probes. Data have been processed for the purpose of studying variability in the trapped proton intensity during October 2013 to August 2015. For the lower energies (less than or similar to 32 MeV), equatorial proton intensity near L = 2 showed a steady increase that is consistent with inward diffusion of trapped solar protons, as shown by positive radial gradients in phase space density at fixed values of the first two adiabatic invariants. It is postulated that these protons were trapped with enhanced efficiency during the 7 March 2012 solar proton event. A model that includes radial diffusion, along with known trapped proton source and loss processes, shows that the observed average rate of increase near L = 2 is predicted by the same model diffusion coefficient that is required to form the entire proton radiation belt, down to low L, over an extended (similar to 10(3) year) interval. A slower intensity decrease for lower energies near L = 1.5 may also be caused by inward diffusion, though it is faster than predicted by the model. Higher-energy (greater than or similar to 40 MeV) protons near the L = 1.5 intensity maximum are from cosmic ray albedo neutron decay. Their observed intensity is lower than expected by a factor similar to 2, but the discrepancy is resolved by adding an unspecified loss process to the model with a mean lifetime similar to 120 years.
C1 [Selesnick, R. S.] US Air Force, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM USA.
[Baker, D. N.; Jaynes, A. N.; Li, X.] Univ Colorado, Atmospher & Space Phys Lab, Campus Box 392, Boulder, CO 80309 USA.
[Li, X.] Univ Colorado, Dept Aerosp Engn Sci, Boulder, CO 80309 USA.
[Kanekal, S. G.] NASA, Goddard Space Flight Ctr, Greenbelt, MD USA.
[Hudson, M. K.] Dartmouth Coll, Dept Phys & Astron, Hanover, NH 03755 USA.
[Kress, B. T.] Univ Colorado, Ctr Cooperat Res Environm Sci, Boulder, CO 80309 USA.
[Kress, B. T.] NOAA, Natl Ctr Environm Informat, Boulder, CO USA.
RP Selesnick, RS (reprint author), US Air Force, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM USA.
EM richard.selesnick@us.af.mil
FU NASA [NNH14AX18I]; Air Force Research Laboratory under the Heliophysics
Guest Investigators Program, at University of Colorado and Dartmouth
College by RBSP-ECT through JHU/APL contract under prime NASA [967399,
NAS5-01072]; Air Force Research Laboratory under the Heliophysics Guest
Investigators Program, Dartmouth College, by NASA grant [NNX15AF54G];
National Science Foundation [AGS-1455470]
FX Van Allen Probes REPT and ephemeris data are available from the ECT
Science Operations and Data Center, http://www.rbsp-ect.lanl.gov;
EMFISIS data are available from http://emfisis.physics.uiowa.edu. We
thank T.P. O'Brien for pointing out the work of Schulz [1975]. This work
was supported in part by NASA agreement NNH14AX18I with the Air Force
Research Laboratory under the Heliophysics Guest Investigators Program,
at University of Colorado and Dartmouth College by RBSP-ECT funding
through JHU/APL contract 967399 under prime NASA contract NAS5-01072,
and, at Dartmouth College, by NASA grant NNX15AF54G and National Science
Foundation grant AGS-1455470.
NR 23
TC 3
Z9 3
U1 0
U2 1
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9380
EI 2169-9402
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD MAR
PY 2016
VL 121
IS 3
BP 1969
EP 1978
DI 10.1002/2015JA022154
PG 10
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA DK2FV
UT WOS:000374730900011
ER
PT J
AU Luque, A
Stenbaek-Nielsen, HC
McHarg, MG
Haaland, RK
AF Luque, A.
Stenbaek-Nielsen, H. C.
McHarg, M. G.
Haaland, R. K.
TI Sprite beads and glows arising from the attachment instability in
streamer channels
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
DE sprites; streamers
ID LOWER IONOSPHERE; IONIZATION; DISCHARGES; MESOSPHERE; HALOS
AB The complex dynamics of a sprite discharge are not limited to the propagation of streamers. After the passage of a streamer head, the ionized channel established in its wake develops intricate luminous patterns that evolve on timescales from 1 up to 100ms. To investigate these patterns, conventionally called beads and glows, we present high-speed recordings of their onset and decay; our main observation here is that in many cases distant points within a channel decay at the same rate despite considerable differences in the underlying air density. We then show that the properties of beads and glows, including this synchronized decay, are explained by the tendency of electric current within a streamer channel to converge to an uniform value and by an attachment instability of electric discharges in air. However, we also discuss the uncertainty about the chemical reactions that affect the electron density during the sprite decay.
C1 [Luque, A.] CSIC, IAA, Granada, Spain.
[Stenbaek-Nielsen, H. C.] Univ Alaska Fairbanks, Inst Geophys, Fairbanks, AK 99775 USA.
[McHarg, M. G.] US Air Force Acad, Colorado Springs, CO 80840 USA.
[Haaland, R. K.] Ft Lewis Coll, Dept Engn Phys, Durango, CO 81301 USA.
RP Luque, A (reprint author), CSIC, IAA, Granada, Spain.
EM aluque@iaa.es
FU Spanish Ministry of Economy and Competitiveness (MINECO)
[ESP2013-48032-C5-5-R, FIS2014-61774-EXP]; Junta de Andalucia, Proyecto
de Excelencia [FQM-5965]; U.S. National Science Foundation [1104441,
1201683]
FX A.L. was supported by the Spanish Ministry of Economy and
Competitiveness (MINECO) under projects ESP2013-48032-C5-5-R and
FIS2014-61774-EXP and by the Junta de Andalucia, Proyecto de
ExcelenciaFQM-5965. H.C.S.-N, M.G.M., and R.H. have been supported by
the U.S. National Science Foundation grants 1104441 and 1201683 to the
University of Alaska Fairbanks and to the U.S. Air Force Academy
respectively. Data and code used in this paper are available upon
request from the authors.
NR 52
TC 1
Z9 1
U1 3
U2 6
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9380
EI 2169-9402
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD MAR
PY 2016
VL 121
IS 3
BP 2431
EP 2449
DI 10.1002/2015JA022234
PG 19
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA DK2FV
UT WOS:000374730900041
ER
PT J
AU Burke, WJ
Martinis, CR
Lai, PC
Gentile, LC
Sullivan, C
Pfaff, RF
AF Burke, W. J.
Martinis, C. R.
Lai, P. C.
Gentile, L. C.
Sullivan, C.
Pfaff, R. F.
TI C/NOFS observations of electromagnetic coupling between magnetically
conjugate MSTID structures
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
DE medium-scale traveling ionospheric disturbances; Alfven wave detection
at midlatitudes; interhemispheric coupling
ID TRAVELING IONOSPHERIC DISTURBANCES; NIGHTTIME MIDLATITUDE IONOSPHERE;
SPORADIC-E-LAYERS; MU RADAR; F-LAYER; ARECIBO; INSTABILITY; SATELLITE;
IMAGES
AB This report demonstrates empirically that couplings between magnetically conjugate medium-scale traveling ionospheric disturbances (MSTIDs) are electromagnetic in nature. This is accomplished by comparing plasma density, electric, and magnetic perturbations sampled simultaneously by sensors on the Communication/Navigation Outage Forecasting System (C/NOFS) satellite. During the period of interest on 17 February 2010, C/NOFS made three consecutive orbits while magnetically conjugate to the field of view of an all-sky imager located at El Leoncito, Argentina (31.8 degrees S, 69.3 degrees W). Imaged 630.0nm airglow was characterized by alternating bands of relatively bright and dark emissions that were aligned from northeast to southwest and propagated toward the northwest, characteristic of MSTIDs in the southern hemisphere. Measurable Poynting fluxes flow along the Earth's magnetic field (S-||) from generator to load hemispheres. While S-|| was predominantly away from the ionosphere above El Leoncito, interhemispheric energy flows were not one-way streets. Measured Poynting flux intensities diminished with time over the three C/NOFS passes, suggesting that source mechanisms of MSTIDs were absent or that initial impedance mismatches between the two hemispheres approached an equilibrium status.
C1 [Burke, W. J.; Lai, P. C.] Boston Coll, Inst Sci Res, Chestnut Hill, MA 02167 USA.
[Martinis, C. R.; Sullivan, C.] Boston Univ, Ctr Space Phys, Boston, MA 02215 USA.
[Gentile, L. C.] Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM USA.
[Pfaff, R. F.] NASA, Goddard Space Flight Ctr, Greenbelt, MD USA.
RP Gentile, LC (reprint author), Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM USA.
EM louise.gentile@kirtland.af.mil
FU Boston College [FA9453-12-C-0205, FA8712-10-C-0001]; NSF Aeronomy
[1123222]; Air Force Office of Scientific Research
FX The authors express their gratitude to Carmen Liebrecht of the NASA
Goddard Space Flight Center for going the extra mile to make the VEFI
electric and magnetic field data available to us. We also thank Patrick
Roddy of the Air Force Research Laboratory who provided the C/NOFS PLP
plasma densities used in this report. C/NOFS PLP data are available from
Roddy upon request. VEFI data from the first 3 years of the C/NOFS
mission are available on the CDA website with plans to make later VEFI
data available. Observations from the Boston University All-sky Imagers
are available at http://sirius.bu.edu/. CINDI data are available at
http://cindispace.utdallas.edu. W.J.B. received support under contracts
FA9453-12-C-0205 and FA8712-10-C-0001 with Boston College. C.R.M.
acknowledges the support of NSF Aeronomy grant 1123222 and Air Force
Office of Scientific Research grant for DURIP instrumentation.
NR 40
TC 3
Z9 3
U1 1
U2 2
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9380
EI 2169-9402
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD MAR
PY 2016
VL 121
IS 3
BP 2569
EP 2582
DI 10.1002/2015JA021965
PG 14
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA DK2FV
UT WOS:000374730900050
ER
PT J
AU Morgan, PE
Visbal, MR
AF Morgan, Philip E.
Visbal, Miguel R.
TI Numerical Investigation of Flow Control for a Flat-Window Cylindrical
Turret
SO AIAA JOURNAL
LA English
DT Article
ID LARGE-EDDY SIMULATION; PLUNGING AIRFOIL; SCHEMES; MESHES
AB This work presents multiple high-fidelity large-eddy simulations of flow over a cylindrical turret with a flat window oriented at two angles, 90 and 100 deg. For the 100 deg case, additional computations were performed to investigate the effectiveness of multiple types of flow control including rows of short pins, tall pins, and steady blowing wall jets inserted upstream of the turret as well as a steady suction slot at the leading edge of the flat window. The large-eddy simulation computations were obtained using a well-validated high-order Navier-Stokes flow solver employing a sixth-order compact spatial discretization in conjunction with an eighth-order low-pass spatial filter. Overall, large-eddy simulation solutions compared favorably to experimental time mean and fluctuating velocity profiles as well as the general flow structure at both angles. Additionally, valuable insight was obtained on how rows of pins, blowing jets, and steady slot suction control flow separation. Slot suction at the upwind aperture lip was determined to be more effective than rows of pins and blowing jets in controlling flow separation, which is critical in reducing aero-optical aberrations. Steady slot suction was capable of eliminating massive separation at a larger look angle of 120 deg.
C1 [Morgan, Philip E.] US Air Force, Res Lab, Ohio Aerosp Inst, Wright Patterson AFB, OH 45433 USA.
[Visbal, Miguel R.] US Air Force, Res Lab, Aerodynam Technol Branch, Wright Patterson AFB, OH 45433 USA.
RP Morgan, PE (reprint author), US Air Force, Res Lab, Ohio Aerosp Inst, Wright Patterson AFB, OH 45433 USA.
NR 43
TC 0
Z9 0
U1 1
U2 1
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0001-1452
EI 1533-385X
J9 AIAA J
JI AIAA J.
PD MAR
PY 2016
VL 54
IS 3
BP 861
EP 879
DI 10.2514/1.J054282
PG 19
WC Engineering, Aerospace
SC Engineering
GA DL1XF
UT WOS:000375425800006
ER
PT J
AU Kaufman, E
Lovell, TA
Lee, T
AF Kaufman, Evan
Lovell, T. Alan
Lee, Taeyoung
TI Nonlinear Observability for Relative Orbit Determination with
Angles-Only Measurements
SO JOURNAL OF THE ASTRONAUTICAL SCIENCES
LA English
DT Article
DE Nonlinear observability; Relative orbit determination; Angles-Only
measurements
ID MODEL-REDUCTION; SYSTEMS; CONTROLLABILITY
AB This paper presents nonlinear observability criteria for the relative orbital dynamics represented by the solutions of the two-body problem. It is assumed that a chief is on a circular orbit with a prescribed orbital radius, and it measures lines-of-sight toward a deputy only. A differential geometric method, based on the Lie derivatives, is used to derive sufficient conditions for observability of the orbital properties of the deputy. It is shown that under certain geometric conditions on the relative configuration between the chief and the deputy, the nonlinear relative motion is observable from angles-only measurements. The second part of this paper presents a quantitative measure of observability for the relative orbits, and it is formulated by generalizing the observability Gramian of linear dynamic systems. An extended Kalman filter is also developed to numerically illustrate the observability of nonlinear relative orbits with angles-only measurements and to show correspondence between the proposed observability measure and filtered solution accuracy.
C1 [Kaufman, Evan; Lee, Taeyoung] George Washington Univ, Dept Mech & Aerosp Engn, Washington, DC 20052 USA.
[Lovell, T. Alan] US Air Force, Space Vehicles Directorate, Res Lab, Kirtland AFB, NM USA.
RP Kaufman, E (reprint author), George Washington Univ, Dept Mech & Aerosp Engn, Washington, DC 20052 USA.
EM evankaufman@gwu.edu; AFRL.RVSV@kirtland.af.mil; tylee@gwu.edu
FU NSF [CMMI-1243000, CMMI-1335008, CNS-1337722, 1029551]
FX This research has been supported in part by NSF under the grants
CMMI-1243000 (transferred from 1029551), CMMI-1335008, and CNS-1337722.
NR 17
TC 0
Z9 0
U1 2
U2 2
PU SPRINGER HEIDELBERG
PI HEIDELBERG
PA TIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANY
SN 0021-9142
EI 2195-0571
J9 J ASTRONAUT SCI
JI J. Astronaut. Sci.
PD MAR
PY 2016
VL 63
IS 1
BP 60
EP 80
DI 10.1007/s40295-015-0082-9
PG 21
WC Engineering, Aerospace
SC Engineering
GA DJ6PS
UT WOS:000374336000004
ER
PT J
AU Misak, HE
Mall, S
AF Misak, H. E.
Mall, S.
TI Cryogenic Tensile Strength and Fatigue Life of Carbon Nanotube
Multi-Yarn
SO JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
LA English
DT Article
DE Carbon Nanotube Yarns; Cryogenic Temperatures; Mechanical Testing;
Textiles; Satellites
ID BEHAVIOR; ARRAYS; WIRES
AB Carbon nanotube (CNT) multi-yarns, consisting of 30 yarns, were tested under monotonic tensile load and fatigue at the room temperature (298 K) and two cryogenic temperatures (232 and 123 K). Tensile stiffness increased with the decrease of temperature. The average ultimate tensile strength was higher at 123 K when compared to the higher temperatures (232 and 298 K). Failure mechanism changed from a combination of classical variant and independent fiber breakage at the two higher temperatures to mostly classical variant failure mechanism at the lower temperature. The CNT-yarn's fatigue life also increased with decreasing temperature. CNT-yarns have been shown to function well at lower temperatures making them usable for applications requiring operation at cryogenic temperatures, such as in satellites and high altitude aircraft.
C1 [Misak, H. E.; Mall, S.] US Air Force, Inst Technol, Dept Aeronaut & Astronaut, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
RP Mall, S (reprint author), US Air Force, Inst Technol, Dept Aeronaut & Astronaut, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
NR 22
TC 1
Z9 1
U1 4
U2 7
PU AMER SCIENTIFIC PUBLISHERS
PI VALENCIA
PA 26650 THE OLD RD, STE 208, VALENCIA, CA 91381-0751 USA
SN 1533-4880
EI 1533-4899
J9 J NANOSCI NANOTECHNO
JI J. Nanosci. Nanotechnol.
PD MAR
PY 2016
VL 16
IS 3
BP 3021
EP 3025
DI 10.1166/jnn.2016.12466
PG 5
WC Chemistry, Multidisciplinary; Nanoscience & Nanotechnology; Materials
Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA DJ4CU
UT WOS:000374153800146
PM 27455753
ER
PT J
AU Reiley, PJ
Jacobs, RR
AF Reiley, Peter J.
Jacobs, Rick R.
TI Ethics Matter: Moderating Leaders' Power Use and Followers' Citizenship
Behaviors
SO JOURNAL OF BUSINESS ETHICS
LA English
DT Article
DE Coercive power; Ethical leadership; Ethics; Expert power; Follower;
Leader's power use; Legitimate power; Military; Organizational
citizenship behavior; Perception; Performance; Power bases; Referent
power; Reward power; Social influence
ID SOCIAL POWER; SUPERVISORY INFLUENCE; INFLUENCE TACTICS; BASES;
SATISFACTION; PERFORMANCE; MANAGERS; MODEL; ORGANIZATIONS; CONSEQUENCES
AB Followers' perceptions of their leaders' ethics have the potential to impact the way they react to the influence of these leaders. The present study of 365 U.S. Air Force Academy Cadets examined how followers' perceptions of their leaders' ethics moderated the relationships found between the leaders' use of power, as conceptualized by French and Raven (Studies in social power, 1959), and the followers' contextual performance. Our results indicated that leaders' use of expert, referent, and reward power was associated with higher levels of organizational citizenship behaviors (OCBs) among their followers when the followers perceived these leaders to be more ethical. Moreover, when followers perceived their leaders to be less ethical, these followers reported lower levels of OCBs when their leaders' utilized referent power. Practical implications, limitations, and future research are also discussed.
C1 [Reiley, Peter J.] USAF Acad, Colorado Springs, CO USA.
[Jacobs, Rick R.] Penn State Univ, University Pk, PA 16802 USA.
RP Reiley, PJ (reprint author), USAF Acad, Colorado Springs, CO USA.
EM peter.reiley@us.af.mil; rrj@psu.edu
NR 83
TC 0
Z9 0
U1 13
U2 22
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0167-4544
EI 1573-0697
J9 J BUS ETHICS
JI J. Bus. Ethics
PD MAR
PY 2016
VL 134
IS 1
BP 69
EP 81
DI 10.1007/s10551-014-2416-0
PG 13
WC Business; Ethics
SC Business & Economics; Social Sciences - Other Topics
GA DI6XO
UT WOS:000373643700005
ER
PT J
AU Braun, LA
Kennedy, HP
Sadler, LS
Dixon, J
Womack, J
Wilson, C
AF Braun, Lisa A.
Kennedy, Holly Powell
Sadler, Lois S.
Dixon, Jane
Womack, Julie
Wilson, Candy
TI US Navy Women's Experience of an Abnormal Cervical Cancer Screening
SO JOURNAL OF MIDWIFERY & WOMENS HEALTH
LA English
DT Article
DE military women; military health care; cervical cancer screening
ID HUMAN-PAPILLOMAVIRUS; MILITARY POPULATION; HEALTH-CARE; RISK;
ADOLESCENT; AMERICAN; RECRUITS
AB IntroductionRecent policy revisions allow greater inclusion of military women in operational and/or deployable positions (ie, shipboard, overseas, and war zone duty assignments), but these positions can create unique health care challenges. Military members are often transient due to deployments and change of duty stations, impacting timely follow-up care for treatable health conditions. There has been minimal research on challenges or strategies in preventive health screening and follow-up for US military women.
MethodsThe purpose of this qualitative research study was to describe US Navy women's experiences with abnormal cervical cancer screenings requiring colposcopic follow-up care. Ship- and shored-based women receiving care at a military colposcopy clinic completed interviews about their experience. Two forms of narrative analysis, Labov's sociolinguistic structural analysis and Braun and Clarke's thematic analysis, were employed to gain a more robust understanding of the women's experiences.
ResultsThe sample was comprised of 26 women (16 ship-based, 10 shore-based). Five themes were identified: 1) It's like this bombshell (initial abnormal results notification); 2) I didn't understand (self-discovery process); 3) Freaked (emotional toll); 4) It's kind of like this back and forth (scheduling and navigating care); and 5) It really opened my eyes (lessons learned).
DiscussionThe women's stories highlighted some issues unique to military health care, such as operational demands and follow-up care; other issues are likely common for most women learning about an abnormal cervical cancer screening result. Areas important for practice and future research include improving notification practices, providing information, understandingwomen's fear, and continuity of care. Research exploring educational initiatives and self-management practices are critical within military populations.
C1 [Braun, Lisa A.] US Navy, Naval Med Ctr, Nursing Res Dept, Portsmouth, VA USA.
[Kennedy, Holly Powell] Yale Univ, Sch Nursing, Midwifery, Orange, CT USA.
[Sadler, Lois S.; Dixon, Jane; Womack, Julie] Yale Univ, Sch Nursing, Orange, CT USA.
[Sadler, Lois S.] Yale Child Study Ctr, Orange, CT USA.
[Sadler, Lois S.] Minding Baby Home Visiting Program, New Haven, CT USA.
[Wilson, Candy] US Air Force, Acupuncture Clin, Joint Base Andrews, MD USA.
RP Braun, LA (reprint author), 720 Cross Quay, Chesapeake, VA 23320 USA.
EM lisa.a.braun.mil@mail.mil
FU Triservice Nursing Research Program [N14-002]
FX This research was supported in part by a Triservice Nursing Research
Program Graduate Research Award (N14-002).
NR 34
TC 0
Z9 0
U1 2
U2 3
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1526-9523
EI 1542-2011
J9 J MIDWIFERY WOM HEAL
JI J. Midwifery Women Health
PD MAR-APR
PY 2016
VL 61
IS 2
BP 249
EP 256
DI 10.1111/jmwh.12378
PG 8
WC Nursing
SC Nursing
GA DI9FS
UT WOS:000373808100013
PM 26849103
ER
PT J
AU Harvazinski, ME
Talley, DG
Sankaran, V
AF Harvazinski, Matthew E.
Talley, Douglas G.
Sankaran, Venkateswaran
TI Influence of Boundary Condition Treatment on Longitudinal-Mode
Combustion Instability Predictions
SO JOURNAL OF PROPULSION AND POWER
LA English
DT Article; Proceedings Paper
CT 49th AIAA/ASME/SAE/ASEE Joint Propulsion Conference (JPC) and Exhibit
CY JUL 14-19, 2013
CL San Jose, CA
SP AIAA, ASME, SAE, ASEE
C1 [Harvazinski, Matthew E.; Talley, Douglas G.; Sankaran, Venkateswaran] US Air Force Res Lab, Rocket Prop Div, Edwards Afb, CA 93524 USA.
RP Harvazinski, ME (reprint author), US Air Force Res Lab, Rocket Prop Div, Edwards Afb, CA 93524 USA.
NR 5
TC 0
Z9 0
U1 2
U2 2
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0748-4658
EI 1533-3876
J9 J PROPUL POWER
JI J. Propul. Power
PD MAR
PY 2016
VL 32
IS 2
BP 529
EP 532
DI 10.2514/1.B35972
PG 4
WC Engineering, Aerospace
SC Engineering
GA DJ0YR
UT WOS:000373930800025
ER
PT J
AU Limbu, TB
Mendoza, F
Barrionuevo, D
Carpena, J
Maruyama, B
Katiyar, RS
Weiner, BR
Morell, G
AF Limbu, Tej B.
Mendoza, Frank
Barrionuevo, Danilo
Carpena, Jennifer
Maruyama, Benji
Katiyar, Ram S.
Weiner, Brad R.
Morell, Gerardo
TI Study on the optical and electrical properties of tetracyanoethylene
doped bilayer graphene stack for transparent conducting electrodes
SO AIP ADVANCES
LA English
DT Article
ID CHEMICAL-VAPOR-DEPOSITION; SINGLE-CRYSTAL GRAPHENE; CHARGE-TRANSFER;
METAL NANOWIRES; LAYER GRAPHENE; COPPER FOILS; FILMS; SPECTROSCOPY;
COMPLEXES; ACID
AB We report the optical and electrical properties of chemically-doped bilayer graphene stack by tetracyanoethylene, a strong electron acceptor. The Tetracyanoethylene doping on the bilayer graphene via charge transfer was confirmed by Raman spectroscopy and Infrared Fourier transform spectroscopy. Doped graphene shows a significant increase in the sheet carrier concentration of up to 1.520x10(13) cm(-2) with a concomitant reduction of the sheet resistance down to 414.1 Omega/sq. The high optical transmittance (ca. 84%) in the visible region in combination with the low sheet resistance of the Tetracyanoethylene-doped bilayer graphene stack opens up the possibility of making transparent conducting electrodes for practical applications. (C) 2016 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
C1 [Limbu, Tej B.; Mendoza, Frank; Barrionuevo, Danilo; Katiyar, Ram S.; Weiner, Brad R.; Morell, Gerardo] Univ Puerto Rico, Inst Funct Nanomat, San Juan, PR 00931 USA.
[Limbu, Tej B.; Barrionuevo, Danilo; Katiyar, Ram S.; Morell, Gerardo] Univ Puerto Rico, Dept Phys, Rio Piedras Campus, San Juan, PR 00931 USA.
[Carpena, Jennifer] CNR, Washington, DC 20001 USA.
[Carpena, Jennifer; Maruyama, Benji] US Air Force, Res Lab, Mat & Mfg Directorate, Dayton, OH 45433 USA.
[Weiner, Brad R.] Univ Puerto Rico, Dept Chem, Rio Piedras Campus, San Juan, PR 00931 USA.
RP Limbu, TB (reprint author), Univ Puerto Rico, Inst Funct Nanomat, San Juan, PR 00931 USA.; Limbu, TB (reprint author), Univ Puerto Rico, Dept Phys, Rio Piedras Campus, San Juan, PR 00931 USA.
EM tejnembang@yahoo.com
OI Weiner, Brad/0000-0002-5255-1918; Morell, Gerardo/0000-0003-4787-2239
FU Institute for Functional Nanomaterials (NSF Cooperative Agreement)
[EPS1002410]; PR NASA EPSCoR (NASA Cooperative Agreement) [NNX15AK 43A]
FX This work was supported by the Institute for Functional Nanomaterials
(NSF Cooperative Agreement EPS1002410) and PR NASA EPSCoR (NASA
Cooperative Agreement No. NNX15AK 43A). The authors gratefully
acknowledge the instrumentation and technical support of the Materials
Characterization Center, Professor Wilfredo Otano, and Adrian Camacho
Berrios for providing the facilities for electrical measurements and
their assistance in the measurements. The authors thank Dr. Vladimir I.
Makarov for valuable comments on the manuscript.
NR 51
TC 1
Z9 1
U1 3
U2 7
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 2158-3226
J9 AIP ADV
JI AIP Adv.
PD MAR
PY 2016
VL 6
IS 3
AR 035319
DI 10.1063/1.4945345
PG 10
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Physics, Applied
SC Science & Technology - Other Topics; Materials Science; Physics
GA DI7MG
UT WOS:000373684200099
ER
PT J
AU Senkov, ON
Isheim, D
Seidman, DN
Pilchak, AL
AF Senkov, Oleg N.
Isheim, Dieter
Seidman, David N.
Pilchak, Adam L.
TI Development of a Refractory High Entropy Superalloy
SO ENTROPY
LA English
DT Article
DE refractory high entropy alloy; superalloy; microstructure and phase
analysis; mechanical properties
ID ATOM-PROBE TOMOGRAPHY; PRINCIPAL ELEMENT ALLOYS; V-ZR SYSTEM;
NBCRMO0.5TA0.5TIZR ALLOY; MECHANICAL-PROPERTIES; LOW-DENSITY;
MICROSTRUCTURE; DESIGN; DECOMPOSITION; STRATEGIES
AB Microstructure, phase composition and mechanical properties of a refractory high entropy superalloy, AlMo0.5NbTa0.5TiZr, are reported in this work. The alloy consists of a nano-scale mixture of two phases produced by the decomposition from a high temperature body-centered cubic (BCC) phase. The first phase is present in the form of cuboidal-shaped nano-precipitates aligned in rows along <100>-type directions, has a disordered BCC crystal structure with the lattice parameter a(1) = 326.9 +/- 0.5 pm and is rich in Mo, Nb and Ta. The second phase is present in the form of channels between the cuboidal nano-precipitates, has an ordered B2 crystal structure with the lattice parameter a(2) = 330.4 +/- 0.5 pm and is rich in Al, Ti and Zr. Both phases are coherent and have the same crystallographic orientation within the former grains. The formation of this modulated nano-phase structure is discussed in the framework of nucleation-and-growth and spinodal decomposition mechanisms. The yield strength of this refractory high entropy superalloy is superior to the yield strength of Ni-based superalloys in the temperature range of 20 degrees C to 1200 degrees C.
C1 [Senkov, Oleg N.; Pilchak, Adam L.] US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Isheim, Dieter; Seidman, David N.] Northwestern Univ, Dept Mat Sci & Engn, 2220 Campus Dr, Evanston, IL 60208 USA.
[Isheim, Dieter; Seidman, David N.] Northwestern Univ, Ctr Atom Probe Tomog, 2220 Campus Dr, Evanston, IL 60208 USA.
RP Senkov, ON (reprint author), US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM oleg.senkov.ctr@us.af.mil; isheim@northwestern.edu;
d-seidman@northwestern.edu; adam.pilchak.1@us.af.mil
RI Seidman, David/B-6697-2009;
OI Senkov, Oleg/0000-0001-5587-415X; Isheim, Dieter/0000-0003-3310-8192
FU ONS through the Air Force on-site contract [FA8650-15-D-5230]; NSF-MRI
[DMR-0420532]; ONR-DURIP [N00014-0400798, N00014-0610539,
N00014-0910781]; MRSEC program through Northwestern's Materials Research
Center [NSF DMR-1121262]; International Institute for Nanotechnology
(IIN); State of Illinois, through the IIN
FX Discussions with D. Miracle and C. Woodward are much appreciated. Work
by ONS was supported through the Air Force on-site contract No.
FA8650-15-D-5230 conducted by UES, Inc., Dayton, Ohio.
Inductively-coupled plasma-optical emission spectroscopy, X-ray
diffraction, SEM and mechanical testing were conducted at the Air Force
Research Laboratory (AFRL). Transmission Electron Microscopy was
conducted at the Ohio State University, Columbus, Ohio, and the
permission of the authors of Ref. [29] and the publisher (Taylor &
Francis Ltd, www.tandfonline.com) to publish Figures 5 and 6 is
appreciated. Atom-probe tomography was performed at the Northwestern
University Center for Atom-Probe Tomography (NUCAPT). The LEAP tomograph
at NUCAPT was purchased and upgraded with funding from NSF-MRI
(DMR-0420532) and ONR-DURIP (N00014-0400798, N00014-0610539,
N00014-0910781) grants. Instrumentation at NUCAPT was supported by the
Initiative for Sustainability and Energy at Northwestern University.
This research made use of Northwestern's NUANCE-EPIC facility. NUCAPT
and EPIC received support from the MRSEC program (NSF DMR-1121262)
through Northwestern's Materials Research Center. EPIC received support
from the International Institute for Nanotechnology (IIN); and the State
of Illinois, through the IIN.
NR 39
TC 3
Z9 3
U1 24
U2 60
PU MDPI AG
PI BASEL
PA POSTFACH, CH-4005 BASEL, SWITZERLAND
SN 1099-4300
J9 ENTROPY-SWITZ
JI Entropy
PD MAR
PY 2016
VL 18
IS 3
DI 10.3390/e18030102
PG 13
WC Physics, Multidisciplinary
SC Physics
GA DI5IH
UT WOS:000373531600018
ER
PT J
AU Jennings, WW
Payne, BC
AF Jennings, William W.
Payne, Brian C.
TI Fees Eat Diversification's Lunch
SO FINANCIAL ANALYSTS JOURNAL
LA English
DT Article
ID MANAGEMENT FEES; 5 MYTHS; STOCKS; BONDS
AB Although diversification is often spoken of as the only free lunch in investing, the authors show that it is not free and that it must be considered in light of its costs. They also show that fees on diversifying asset classes are high relative to their risk-adjusted diversification benefit, with the more exotic asset classes carrying higher price tags. Because there is meaningful cross-sectional variation, fees need to be considered when making strategic asset allocation decisions.
C1 [Jennings, William W.] US Air Force Acad, Finance & Investments, Colorado Springs, CO 80840 USA.
[Payne, Brian C.] US Air Force Acad, Management, Colorado Springs, CO 80840 USA.
RP Jennings, WW (reprint author), US Air Force Acad, Finance & Investments, Colorado Springs, CO 80840 USA.
NR 25
TC 0
Z9 0
U1 1
U2 1
PU CFA INST
PI CHARLOTTESVILLE
PA 915 EAST HIGH ST, CHARLOTTESVILLE, VA 22902 USA
SN 0015-198X
EI 1938-3312
J9 FINANC ANAL J
JI Financ. Anal. J.
PD MAR-APR
PY 2016
VL 72
IS 2
BP 31
EP 40
PG 10
WC Business, Finance
SC Business & Economics
GA DI9ZW
UT WOS:000373862200005
ER
PT J
AU Ingalls, NK
Armstrong, B
Hester, M
Hatzfeld, JJ
Robinson, BRH
Fortuna, GR
AF Ingalls, Nichole K.
Armstrong, Bracken
Hester, Marisa
Hatzfeld, Jennifer J.
Robinson, Bryce R. H.
Fortuna, Gerald R.
TI The Fog of War: Delirium Prevalence in a Combat Intensive Care Unit
SO MILITARY MEDICINE
LA English
DT Article
ID MECHANICALLY VENTILATED PATIENTS; RISK-FACTORS; TRAUMA; PREDICTOR;
MORTALITY
AB Introduction: Delirium is a fluctuating disturbance in consciousness associated with increased mortality. Injured warriors represent a unique unstudied population. We hypothesized delirium is common because of high injury severity scores and multidrug sedation regimens. Methods: Mandatory delirium screening using the confusion assessment method (CAM) was initiated at Craig Joint Theater Hospital in Bagram, Afghanistan. Data were collected in July to August 2012 from the first 50 English-speaking trauma patients with CAM for the Intensive Care Unit (ICU) scores. Results: Patients were male with mean age of 27.8 years; 88% of them were U.S. military personnel. Injury mechanisms were blast (68%) and gunshot (26%). Mean injury severity score was 20. Average ICU length of stay was 2.3 days; 64% were ventilated (for mean 1.2 days). Average time from arrival to CAM assessment was 7 hours, and 26 hours from the time of injury. Of patients, 44% were delirious, 36% at first CAM assessment. Fentanyl (62%) and ketamine (16%) were used for pain control (62%) and propofol for sedation (52%). There was no relationship between delirium and mechanism (p = 0.5) or ketamine on first ICU day (p = 0.2262). Delirium increased with vent days (p <.0001) and was associated with admission and mechanical ventilation (p = 0.0025). Conclusions: This study demonstrates a high rate of deliriumin this unique population.
C1 [Ingalls, Nichole K.; Armstrong, Bracken; Hester, Marisa] Mike OCallaghan Fed Med Ctr, Med Grp 99, 4700 N Las Vegas Blvd, Nellis AFB, NV 89191 USA.
[Hatzfeld, Jennifer J.] Def Med Res & Dev Program, 504 Scott St, Ft Detrick, MD 21702 USA.
[Robinson, Bryce R. H.] Univ Cincinnati, Coll Med, Div Trauma & Crit Care, 231 Albert B Sabin Way,POB 670558, Cincinnati, OH 45267 USA.
[Fortuna, Gerald R.] UT Mem Hermann Hosp, Dept Cardiothorac & Vasc Surg, 6400 Fannin St,Suite 2850, Houston, TX 77030 USA.
RP Ingalls, NK (reprint author), Mike OCallaghan Fed Med Ctr, Med Grp 99, 4700 N Las Vegas Blvd, Nellis AFB, NV 89191 USA.
NR 20
TC 0
Z9 1
U1 6
U2 8
PU ASSOC MILITARY SURG US
PI BETHESDA
PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 USA
SN 0026-4075
EI 1930-613X
J9 MIL MED
JI Milit. Med.
PD MAR
PY 2016
VL 181
IS 3
BP 209
EP 212
DI 10.7205/MILMED-D-15-00064
PG 4
WC Medicine, General & Internal
SC General & Internal Medicine
GA DI3NJ
UT WOS:000373405100014
PM 26926744
ER
PT J
AU Howell, CM
Sontgerath, JS
Simonet, LB
AF Howell, Christopher M.
Sontgerath, Joseph S.
Simonet, Luke B.
TI Unexploded Ordnance in an Expectant Patient: A Case Report
SO MILITARY MEDICINE
LA English
DT Article
ID REMOVAL
AB Retained unexploded ordnance is only one of the numerous potential threats to coalition forces while deployed in the theater of operations. Though rare, these are also very real dangers for personnel involved with patient care and movement. Principles of management include determination of device type with plain film radiography, minimizing rotational and vibratory movement, and strategic isolation of the patient from the hospital facility, hospital personnel, and other patients. Early identification of this threat, as well as early involvement of the Explosive Ordnance Disposal team is paramount to safe and successful management. We present a case of a deceased patient in the expectant triage category with a delayed identification of retained unexploded ordnance during postmortem preparation.
C1 [Howell, Christopher M.] Wright Patterson Med Ctr, Dept Emergency Med, 4881 Sugar Maple Dr, Wright Patterson AFB, OH 45433 USA.
[Sontgerath, Joseph S.] Mike OCallaghan Fed Med Ctr, Dept Emergency Med, 4700 Las Vegas Blvd North,Bldg 1300, Nellis AFB, NV 89191 USA.
[Simonet, Luke B.] Dept Radiol, 101 Boden Circle, Travis AFB, CA 94535 USA.
RP Howell, CM (reprint author), Wright Patterson Med Ctr, Dept Emergency Med, 4881 Sugar Maple Dr, Wright Patterson AFB, OH 45433 USA.
NR 6
TC 1
Z9 1
U1 0
U2 1
PU ASSOC MILITARY SURG US
PI BETHESDA
PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 USA
SN 0026-4075
EI 1930-613X
J9 MIL MED
JI Milit. Med.
PD MAR
PY 2016
VL 181
IS 3
BP E302
EP E305
DI 10.7205/MILMED-D-15-00213
PG 4
WC Medicine, General & Internal
SC General & Internal Medicine
GA DI3NJ
UT WOS:000373405100003
PM 26926759
ER
PT J
AU Triplett, D
Stewart, E
Mathew, S
Horne, BR
Prakash, V
AF Triplett, Drew
Stewart, Elizabeth
Mathew, Stephanie
Horne, Brandon R.
Prakash, Vidhya
TI Delayed Diagnosis of Tuberculous Arthritis of the Knee in an Air Force
Service Member: Case Report and Review of the Literature
SO MILITARY MEDICINE
LA English
DT Review
ID OSTEOARTICULAR TUBERCULOSIS; RHEUMATOID-ARTHRITIS; ARTHROPLASTY;
SYNOVITIS
AB Tuberculosis (TB) is a common disease worldwide affecting more than 2 billion people, including latent, pulmonary, and extrapulmonary TB. The presentation of disseminated TB is variable and dependent on the organs affected. Therefore, making the diagnosis and providing appropriate treatment can be delayed. We present a case of disseminated TB in a patient with Sjogren's syndrome on hydroxychloroquine monotherapy without traditional risk factors.
C1 [Triplett, Drew] Wright State Univ, Boonshoft Sch Med, Dept Internal Med, 128 E Apple St,Weber CHE Bldg,2nd Floor, Dayton, OH 45409 USA.
[Stewart, Elizabeth] Dayton Vet Affairs Med Ctr, Dept Med, 4100 West 3rd St, Dayton, OH 45428 USA.
[Mathew, Stephanie] Wright Patterson Med Ctr, Rheumatol Clin, 4881 Sugar Maple Dr, Wright Patterson AFB, OH 45433 USA.
[Horne, Brandon R.] Wright Patterson Med Ctr, Orthoped Clin, 4881 Sugar Maple Dr, Wright Patterson AFB, OH 45433 USA.
[Prakash, Vidhya] So Illinois Univ, Sch Med, Dept Internal Med, Div Infect Dis, 701 North First St,A482, Springfield, IL 62702 USA.
RP Triplett, D (reprint author), Wright State Univ, Boonshoft Sch Med, Dept Internal Med, 128 E Apple St,Weber CHE Bldg,2nd Floor, Dayton, OH 45409 USA.
NR 29
TC 0
Z9 0
U1 0
U2 1
PU ASSOC MILITARY SURG US
PI BETHESDA
PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 USA
SN 0026-4075
EI 1930-613X
J9 MIL MED
JI Milit. Med.
PD MAR
PY 2016
VL 181
IS 3
BP E306
EP E309
DI 10.7205/MILMED-D-15-00232
PG 4
WC Medicine, General & Internal
SC General & Internal Medicine
GA DI3NJ
UT WOS:000373405100004
PM 26926760
ER
PT J
AU Hoff, BW
French, DM
Reid, RR
Lawrance, JE
Lepell, PD
Maestas, SS
AF Hoff, Brad W.
French, David M.
Reid, Remington R.
Lawrance, Julie E.
Lepell, P. David
Maestas, Sabrina S.
TI Apparatus for generating quasi-free-space microwave-driven plasmas
SO REVIEW OF SCIENTIFIC INSTRUMENTS
LA English
DT Article
ID DEVICE
AB An apparatus for generating quasi-free-space microwave-driven plasmas has been designed, constructed, and tested. The plasma is driven by a multi-kW, similar to 5 GHz microwave beam focused at the center of a vacuum chamber using a Koch-type metal plate lens. Sustained plasma discharges have been generated in argon at pressures ranging from 150 to 200 mTorr, at beam power levels ranging from 5 to 10 kW, and at gas flow rates of approximately 200 SCCM.
C1 [Hoff, Brad W.; French, David M.; Reid, Remington R.; Lawrance, Julie E.; Maestas, Sabrina S.] US Air Force, Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA.
[Lepell, P. David] Leidos, 2109 Air Pk Rd SE, Albuquerque, NM 87106 USA.
RP Hoff, BW (reprint author), US Air Force, Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA.
FU Air Force Office of Scientific Research [AFOSR LRIR 13RD02COR]; Air
Force Research Laboratory; NRC Research Associateship award at the Air
Force Research Laboratory
FX This work was funded by the Air Force Office of Scientific Research
under Grant No. AFOSR LRIR 13RD02COR and by the Air Force Research
Laboratory. R. R. Reid's contribution to this effort was performed while
holding an NRC Research Associateship award at the Air Force Research
Laboratory.
NR 12
TC 0
Z9 0
U1 3
U2 3
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0034-6748
EI 1089-7623
J9 REV SCI INSTRUM
JI Rev. Sci. Instrum.
PD MAR
PY 2016
VL 87
IS 3
AR 033507
DI 10.1063/1.4944865
PG 6
WC Instruments & Instrumentation; Physics, Applied
SC Instruments & Instrumentation; Physics
GA DI7WS
UT WOS:000373713300027
PM 27036777
ER
PT J
AU Kuersten, A
AF Kuersten, Andreas
TI Strategic Reassurance and Resolve: US-China Relations in the
Twenty-First Century
SO CHINA QUARTERLY
LA English
DT Book Review
C1 [Kuersten, Andreas] US Court Appeals Armed Forces, Washington, DC 20442 USA.
[Kuersten, Andreas] NOAA, Washington, DC USA.
[Kuersten, Andreas] US Navy, Washington, DC USA.
[Kuersten, Andreas] US Air Force, Washington, DC USA.
RP Kuersten, A (reprint author), US Court Appeals Armed Forces, Washington, DC 20442 USA.
EM andreas.kuersten@armfor.uscourts.gov
NR 1
TC 0
Z9 0
U1 3
U2 4
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 0305-7410
EI 1468-2648
J9 CHINA QUART
JI China Q.
PD MAR
PY 2016
VL 225
BP 264
EP 266
DI 10.1017/S0305741016000096
PG 3
WC Area Studies
SC Area Studies
GA DH5FY
UT WOS:000372812700019
ER
PT J
AU Yang, J
Kwon, HM
Mukherjee, A
Pham, KD
AF Yang, Jie
Kwon, Hyuck M.
Mukherjee, Amitav
Pham, Khanh D.
TI Spreading-Sequence Design for Partially Connected Multirelay Networks
Under Multipath Fading
SO IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
LA English
DT Article
DE Code-division multiple access (CDMA); frequency-selective fading; fully
connected (FC); partially connected; relay network;
signal-to-interference-plus-noise ratio (SINR); spreading sequence
ID DS-CDMA SYSTEMS; WIDE-RANGE; SIGNATURE; INTERFERENCE; PERFORMANCE;
ADAPTATION; CHANNELS; CAPACITY; FEEDBACK
AB Multipath fading can degrade the performance of a wireless communication system significantly when the data rate is as high as those systems beyond Long-Term Evolution Advanced (LTE-A). To combat the multipath-fading effects, orthogonal frequency-division multiplexing (OFDM) techniques have been extensively studied and used in existing systems. However, another effective method to combat multipath fading is a code-division multiple access (CDMA) scheme, which has not been extensively investigated for relay network communication systems. This paper considers uplink CDMA relay networks (consisting of multiple sources, multiple relays, and a single destination) and downlinks (consisting of a combined source, multiple relays, and multiple destinations) under multipath fading. The objective of this paper is to propose a unique, simple, and effective method of finding optimum nonbinary pseudo noise (PN) spreading and despreading sequences employing a maximum signal-to-interference-plus-noise ratio (SINR) criterion and channel state information (CSI). This paper also examines the sensitivity of the proposed schemes to 1-bit quantization, mistiming alignment, wideband jamming, and imperfect CSI. Simulation results verify that the proposed method shows much faster convergence in finding optimum PN sequences and better performance than existing schemes under the same environment.
C1 [Yang, Jie] No Arizona Univ, Dept Elect Engn & Comp Sci, Flagstaff, AZ 86011 USA.
[Kwon, Hyuck M.] Wichita State Univ, Dept Elect Engn & Comp Sci, Wichita, KS 67260 USA.
[Mukherjee, Amitav] Ericsson Res, San Jose, CA 95134 USA.
[Pham, Khanh D.] US Air Force, Res Lab, Spacecraft Component Technol Branch, AFRV RVSV, Albuquerque, NM 87117 USA.
RP Yang, J (reprint author), No Arizona Univ, Dept Elect Engn & Comp Sci, Flagstaff, AZ 86011 USA.; Kwon, HM (reprint author), Wichita State Univ, Dept Elect Engn & Comp Sci, Wichita, KS 67260 USA.; Mukherjee, A (reprint author), Ericsson Res, San Jose, CA 95134 USA.; Pham, KD (reprint author), US Air Force, Res Lab, Spacecraft Component Technol Branch, AFRV RVSV, Albuquerque, NM 87117 USA.
EM Jie.Yang@nau.edu; hyuck.kwon@wichita.edu; amitav.mukherjee@ericsson.com;
khanh.pham.1@us.af.mil
NR 42
TC 1
Z9 1
U1 3
U2 4
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9545
EI 1939-9359
J9 IEEE T VEH TECHNOL
JI IEEE Trans. Veh. Technol.
PD MAR
PY 2016
VL 65
IS 3
BP 1420
EP 1433
DI 10.1109/TVT.2015.2406666
PG 14
WC Engineering, Electrical & Electronic; Telecommunications; Transportation
Science & Technology
SC Engineering; Telecommunications; Transportation
GA DH5LU
UT WOS:000372831500036
ER
PT J
AU Kambhatla, KKR
Paluri, S
Matyjas, JD
Kumar, S
AF Kambhatla, Kashyap K. R.
Paluri, Seethal
Matyjas, John D.
Kumar, Sunil
TI Cross-Layer prioritized H.264 video packetization and error protection
over noisy channels
SO MULTIMEDIA TOOLS AND APPLICATIONS
LA English
DT Article
DE H.264/AVC; Video compression; Cross-layer; Priority-adaptive packet
formation; Packet discarding; Error protection; Live streaming
ID WIRELESS LANS; PACKET SIZE; TRANSMISSION; NETWORKS; OPTIMIZATION;
IMPROVEMENT; ALGORITHM; MODEL
AB Video transmission over wireless channels is affected by channel-induced packet losses. Distortion due to channel errors can be alleviated by applying forward error correction. Aggregating H.264/AVC slices to form video packets with sizes adapted to their importance can also improve transmission reliability. Larger packets are more likely to be in error but smaller packets require more overhead. We present a cross-layer dynamic programming (DP) approach to minimize the expected received video distortion by jointly addressing the priority-adaptive packet formation at the application layer and rate compatible punctured convolutional (RCPC) code rate allocation at the physical layer for prioritized slices of each group of pictures (GOP). Some low priority slices are also discarded to improve protection to more important slices and meet the channel bit-rate limitations. We propose two schemes. Our first scheme carries out joint optimization for all slices of a GOP at a time. The second scheme extends our cross-layer DP-based approach to slices of each frame by predicting the expected channel bit budget per frame for live streaming. The prediction uses a generalized linear model developed over the cumulative mean squared error per frame, channel SNR, and normalized compressed frame bit budget. The parameters are determined over a video dataset that spans high, medium and low motion complexity. The predicted frame bit budget is used to derive the packet sizes and corresponding RCPC code rates for live transmission using our DP-based approach. Simulation results show that both proposed schemes significantly improve the received video quality over contemporary error protection schemes.
C1 [Kambhatla, Kashyap K. R.; Kumar, Sunil] Univ Calif San Diego, Elect & Comp Engn, La Jolla, CA 92093 USA.
[Paluri, Seethal] San Diego State Univ, Computat Sci Res Ctr, San Diego, CA 92182 USA.
[Matyjas, John D.] Air Force Res Lab, Rome, NY USA.
RP Kambhatla, KKR (reprint author), Univ Calif San Diego, Elect & Comp Engn, La Jolla, CA 92093 USA.
EM kkambhat@ucsd.edu; spaluri@mail.sdsu.edu; john.matyjas@us.af.mil;
skumar@mail.sdsu.edu
FU U.S. Air Force Research Laboratory [FA8750-08-1-0078, FA8750-11-1-0048]
FX Approved for Public Release; Distribution Unlimited: 88ABW-2014-5102, 4
Nov. 2014. This research was partially supported by awards from the U.S.
Air Force Research Laboratory under contract #FA8750-08-1-0078 and
#FA8750-11-1-0048. Opinions, interpretations, and conclusions are those
of the authors and are not necessarily endorsed by the United States
Government.
NR 47
TC 0
Z9 0
U1 0
U2 1
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 1380-7501
EI 1573-7721
J9 MULTIMED TOOLS APPL
JI Multimed. Tools Appl.
PD MAR
PY 2016
VL 75
IS 6
BP 3235
EP 3257
DI 10.1007/s11042-014-2432-1
PG 23
WC Computer Science, Information Systems; Computer Science, Software
Engineering; Computer Science, Theory & Methods; Engineering, Electrical
& Electronic
SC Computer Science; Engineering
GA DH6BI
UT WOS:000372875600015
ER
PT J
AU Levy, H
Clucas, GV
Rogers, AD
Leache, AD
Ciborowski, KL
Polito, MJ
Lynch, HJ
Dunn, MJ
Hart, T
AF Levy, Hila
Clucas, Gemma V.
Rogers, Alex D.
Leache, Adam D.
Ciborowski, Kate L.
Polito, Michael J.
Lynch, Heather J.
Dunn, Michael J.
Hart, Tom
TI Population structure and phylogeography of the Gentoo Penguin
(Pygoscelis papua) across the Scotia Arc
SO ECOLOGY AND EVOLUTION
LA English
DT Article
DE Bayesian phylogeography; dispersal; microsatellites; penguins;
population genetics; Pygoscelis papua
ID MULTILOCUS GENOTYPE DATA; LAST GLACIAL MAXIMUM; ANTARCTIC PENINSULA;
CLIMATE-CHANGE; FALKLAND ISLANDS; EMPEROR PENGUIN; SOUTHERN-OCEAN;
SEA-ICE; GENETIC DIFFERENTIATION; MEGADYPTES-ANTIPODES
AB Climate change, fisheries' pressure on penguin prey, and direct human disturbance of wildlife have all been implicated in causing large shifts in the abundance and distribution of penguins in the Southern Ocean. Without mark-recapture studies, understanding how colonies form and, by extension, how ranges shift is challenging. Genetic studies, particularly focused on newly established colonies, provide a snapshot of colonization and can reveal the extent to which shifts in abundance and occupancy result from changes in demographic rates (e.g., reproduction and survival) or migration among suitable patches of habitat. Here, we describe the population structure of a colonial seabird breeding across a large latitudinal range in the Southern Ocean. Using multilocus microsatellite genotype data from 510 Gentoo penguin (Pygoscelis papua) individuals from 14 colonies along the Scotia Arc and Antarctic Peninsula, together with mitochondrial DNA data, we find strong genetic differentiation between colonies north and south of the Polar Front, that coincides geographically with the taxonomic boundary separating the subspecies P. p. papua and P. p. ellsworthii. Using a discrete Bayesian phylogeographic approach, we show that southern Gentoos expanded from a possible glacial refuge in the center of their current range, colonizing regions to the north and south through rare, long-distance dispersal. Our findings show that this dispersal is important for new colony foundation and range expansion in a seabird species that ordinarily exhibits high levels of natal philopatry, though persistent oceanographic features serve as barriers to movement.
C1 [Levy, Hila; Clucas, Gemma V.; Rogers, Alex D.; Hart, Tom] Univ Oxford, Dept Zool, S Parks Rd, Oxford OX1 3PS, England.
[Levy, Hila] USAF, Air Force Inst Technol, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
[Clucas, Gemma V.] Univ Southampton, Ocean & Earth Sci, Waterfront Campus,European Way, Southampton SO14 3ZH, Hants, England.
[Leache, Adam D.] Univ Washington, Dept Biol, Box 351800, Seattle, WA 98195 USA.
[Leache, Adam D.] Univ Washington, Burke Museum Nat Hist & Culture, Box 351800, Seattle, WA 98195 USA.
[Ciborowski, Kate L.] Univ Bristol, Dept Biol, Woodland Rd, Bristol BS8 1UG, Avon, England.
[Polito, Michael J.] Louisiana State Univ, Dept Oceanog & Coastal Sci, Baton Rouge, LA 70803 USA.
[Lynch, Heather J.] SUNY Stony Brook, Dept Ecol & Evolut, Stony Brook, NY 11794 USA.
[Dunn, Michael J.] British Antarctic Survey, High Cross,Madingley Rd, Cambridge CB3 0ET, England.
RP Levy, H (reprint author), Univ Oxford, Dept Zool, S Parks Rd, Oxford OX1 3PS, England.
EM hila.levy@zoo.ox.ac.uk
OI Levy, Hila/0000-0001-9204-6417; Clucas, Gemma/0000-0002-4305-1719
FU Falkland Islands Government Environmental Planning Department; Charities
Advisory Trust; John Ray Trust; Sigma Xi; Rhodes Trust; British
International Helicopters Ltd in the Falkland Islands; US Air Force;
Royal Air Force
FX This study was funded by the Falkland Islands Government Environmental
Planning Department, the Charities Advisory Trust, the John Ray Trust,
Sigma Xi, and the Rhodes Trust. We thank British International
Helicopters Ltd in the Falkland Islands, the US Air Force, and Royal Air
Force for their support of this project.
NR 121
TC 2
Z9 2
U1 8
U2 25
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 2045-7758
J9 ECOL EVOL
JI Ecol. Evol.
PD MAR
PY 2016
VL 6
IS 6
BP 1834
EP 1853
DI 10.1002/ece3.1929
PG 20
WC Ecology; Evolutionary Biology
SC Environmental Sciences & Ecology; Evolutionary Biology
GA DH0QI
UT WOS:000372488300023
PM 26933489
ER
PT J
AU Niemtzow, RC
Burns, SM
Piazza, TR
Pock, AR
Walter, J
Petri, R
Hofmann, L
Wilson, C
Drake, D
Calabria, K
Biery, J
Baxter, JS
Gallagher, RM
Jonas, WB
AF Niemtzow, Richard C.
Burns, Stephen M.
Piazza, Thomas R.
Pock, Arnyce R.
Walter, Joan
Petri, Richard
Hofmann, Lewis
Wilson, Candy
Drake, David
Calabria, Kathryn
Biery, John
Baxter, John S.
Gallagher, Rollin M.
Jonas, Wayne B.
TI Integrative Medicine in the Department of Defense and the Department of
Veterans Affairs: Cautious Steps Forward
SO JOURNAL OF ALTERNATIVE AND COMPLEMENTARY MEDICINE
LA English
DT Editorial Material
C1 [Niemtzow, Richard C.; Burns, Stephen M.; Piazza, Thomas R.; Wilson, Candy; Calabria, Kathryn] US Air Force, Malcolm Grow Med Clin & Surg Ctr, Acupuncture & Integrat Med Ctr, 1050 W Perimeter Rd, Joint Base Andrews, MD 20762 USA.
[Pock, Arnyce R.] Uniformed Serv Univ Hlth Sci, Bethesda, MD 20814 USA.
[Walter, Joan; Jonas, Wayne B.] Samueli Inst, Alexandria, VA USA.
[Petri, Richard] William Beaumont Army Med Ctr, El Paso, TX 79920 USA.
[Hofmann, Lewis] Shoreland Inc, Arlington, VA USA.
[Drake, David] Hunter Holmes McGuire Vet Affairs Med Ctr, Richmond, VA USA.
[Biery, John] Naval Installat Command, Navy Wounded Warrior Safe Harbor, Washington, DC USA.
[Baxter, John S.] Pentagon Flight Med Clin, Washington, DC USA.
[Gallagher, Rollin M.] Corporal Michael J Crescent Vet Affairs Med Ctr, Philadelphia, PA USA.
RP Niemtzow, RC (reprint author), US Air Force, Malcolm Grow Med Clin & Surg Ctr, Acupuncture & Integrat Med Ctr, 1050 W Perimeter Rd, Joint Base Andrews, MD 20762 USA.
EM n5evmd@gmail.com
NR 3
TC 1
Z9 1
U1 0
U2 0
PU MARY ANN LIEBERT, INC
PI NEW ROCHELLE
PA 140 HUGUENOT STREET, 3RD FL, NEW ROCHELLE, NY 10801 USA
SN 1075-5535
EI 1557-7708
J9 J ALTERN COMPLEM MED
JI J. Altern. Complement Med.
PD MAR 1
PY 2016
VL 22
IS 3
BP 171
EP 173
DI 10.1089/acm.2016.29002.rcn
PG 3
WC Integrative & Complementary Medicine
SC Integrative & Complementary Medicine
GA DG9OG
UT WOS:000372412500001
PM 26890036
ER
PT J
AU Barron, LG
Carretta, TR
Rose, MR
AF Barron, Laura G.
Carretta, Thomas R.
Rose, Mark R.
TI Aptitude and Trait Predictors of Manned and Unmanned Aircraft Pilot Job
Performance
SO MILITARY PSYCHOLOGY
LA English
DT Article
DE aviator aptitude and personality traits; job performance; remotely
piloted aircraft; unmanned aerial systems
ID PERSONALITY-TRAITS; METAANALYSIS; REACTIVITY; ABILITY
AB Previous research has shown that the same aptitude and trait measures that predict success in U.S. Air Force (USAF) manned aircraft pilot training predict remotely piloted aircraft (RPA) pilot training outcomes with generally similar levels of validity (Carretta, 2013; Rose, Barron, Carretta, Arnold, & Howse, 2014). However, because USAF RPA pilots initially train in manned aircraft, validation of aptitude and traits predictive of RPA pilot success has thus far been limited to RPA pilot training outcomes that actually require manned flight. Hence, thus far, there has been no basis for determining the aptitudes and traits predictive of success in environments in which pilots actually fly RPAs. To address this gap, the present study evaluated preaccession trait (Big Five personality domains) and aptitude (spatial, quantitative, and aviation knowledge) measures as predictors of manned and unmanned aircraft pilot performance on-the-job, as measured by supervisor and senior rater stratification on 3 years of Officer Performance Reports (OPRs). Results were generally consistent in showing that the same aptitudes, knowledge, and personality traits that predict successful job performance for manned aircraft pilots also predict successful job performance for RPA pilots. However, results also showed preaccession aviation knowledge to be a stronger predictor of job performance for RPA pilots than for manned aircraft pilots. These findings and their implications for attracting and selecting RPA pilots are discussed.
C1 [Barron, Laura G.; Rose, Mark R.] Air Force Personnel Ctr, Randolph AFB, TX USA.
[Carretta, Thomas R.] Air Force Res Lab, Wright Patterson AFB, OH USA.
RP Barron, LG (reprint author), HQ AFPC DSYX Strateg Res & Assessment, 550 C St West, Randolph AFB, TX 78150 USA.
EM laura.barron@us.af.mil
NR 42
TC 0
Z9 0
U1 8
U2 13
PU AMER PSYCHOLOGICAL ASSOC
PI WASHINGTON
PA 750 FIRST ST NE, WASHINGTON, DC 20002-4242 USA
SN 0899-5605
EI 1532-7876
J9 MIL PSYCHOL
JI Milit. Psychol.
PD MAR
PY 2016
VL 28
IS 2
BP 65
EP 77
DI 10.1037/mil0000109
PG 13
WC Psychology, Multidisciplinary
SC Psychology
GA DG8ZK
UT WOS:000372371900001
ER
PT J
AU Schneider, KG
Bezdjian, S
Burchett, D
Isler, WC
Dickey, D
Garb, HN
AF Schneider, Kristin G.
Bezdjian, Serena
Burchett, Danielle
Isler, William C.
Dickey, David
Garb, Howard N.
TI The Impact of the United States Air Force Deployment Transition Center
on Postdeployment Mental Health Outcomes
SO MILITARY PSYCHOLOGY
LA English
DT Article
DE Air Force service members; third-location decompression; Deployment
Transition Center; deployment health assessments; mental health
ID PROPENSITY SCORE; 3RD-LOCATION DECOMPRESSION; AFGHANISTAN; IRAQ;
SOLDIERS; PROGRAM; SERVICE; CARE
AB The United States Air Force Deployment Transition Center (DTC) operates a 2-day third-location decompression program that commenced operations during the summer of 2010 in Ramstein, Germany, with the aim to assist Air Force service members (AFSMs) who are returning from deployment as they prepare to reintegrate back into their home lives and work stations. The present study evaluated the impact of DTC attendance on later mental health outcomes. Because participants are not randomly assigned to attend the DTC, propensity score weighting was used to compare DTC participants (N = 1,573) to a weighted control group of AFSMs (N = 1,570) in the same job specialties who returned from deployment during the same time period. Rates of endorsement to items on the Postdeployment Health Reassessment were examined and compared, as were rates of mental health diagnoses from AFSMs' official medical records. Key findings indicate that DTC participants reported lower levels of depressive and posttraumatic stress symptoms and lower levels of relationship conflict following return from deployment, as compared to weighted control participants. Mental health diagnostic rates were comparable for the 2 groups during the first 6 months following return from deployment. These findings suggest that participation in the DTC program had notable benefits for redeploying AFSMs and support the continued use of the program.
C1 [Schneider, Kristin G.; Bezdjian, Serena; Burchett, Danielle] Ctr Monterey Bay, Dept Def, 400 Gigling Rd,Suite 2300, Seaside, CA 93955 USA.
[Burchett, Danielle] Calif State Univ Monterey Bay, Dept Psychol, Seaside, CA USA.
[Isler, William C.; Garb, Howard N.] Joint Base San Antonio, Lackland AFB, TX USA.
[Dickey, David] Barksdale AFB, Shreveport, LA USA.
RP Schneider, KG (reprint author), Ctr Monterey Bay, Dept Def, 400 Gigling Rd,Suite 2300, Seaside, CA 93955 USA.
EM dr.kristin.schneider@gmail.com
OI Bezdjian, Serena/0000-0003-4755-4257
NR 36
TC 0
Z9 0
U1 1
U2 4
PU AMER PSYCHOLOGICAL ASSOC
PI WASHINGTON
PA 750 FIRST ST NE, WASHINGTON, DC 20002-4242 USA
SN 0899-5605
EI 1532-7876
J9 MIL PSYCHOL
JI Milit. Psychol.
PD MAR
PY 2016
VL 28
IS 2
BP 89
EP 103
DI 10.1037/mil0000105
PG 15
WC Psychology, Multidisciplinary
SC Psychology
GA DG8ZK
UT WOS:000372371900003
ER
PT J
AU Knize, RJ
Zhdanov, BV
Rotondaro, MD
Shaffer, MK
AF Knize, Randall J.
Zhdanov, Boris V.
Rotondaro, Matthew D.
Shaffer, Michael K.
TI Experimental study of the Cs diode pumped alkali laser operation with
different buffer gases
SO OPTICAL ENGINEERING
LA English
DT Article
DE diode pumped alkali laser; alkali lasers; Cs laser
ID RUBIDIUM; ATOMS
AB Cs diode pumped alkali laser (DPAL) operation using ethane, methane, and mixtures of these hydrocarbons with the noble gases He and Ar as a buffer gas for spin-orbit relaxation was studied in this work. The best Cs DPAL performance in continuous wave operation with flowing gain medium was achieved using pure methane, pure ethane, or a mixture of ethane (minimum of 200 Torr) and He with a total buffer gas pressure of 300 Torr. (C) 2016 Society of Photo-Optical Instrumentation Engineers (SPIE)
C1 [Knize, Randall J.; Zhdanov, Boris V.; Rotondaro, Matthew D.; Shaffer, Michael K.] US Air Force Acad, Laser & Opt Res Ctr, 2354 Fairchild Dr,St 2A31, Colorado Springs, CO 80840 USA.
RP Zhdanov, BV (reprint author), US Air Force Acad, Laser & Opt Res Ctr, 2354 Fairchild Dr,St 2A31, Colorado Springs, CO 80840 USA.
EM boris.zhdanov.ctr@usafa.edu
FU High Energy Lasers Joint Technology Office
FX We acknowledge support of the High Energy Lasers Joint Technology
Office.
NR 11
TC 2
Z9 2
U1 6
U2 8
PU SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA
SN 0091-3286
EI 1560-2303
J9 OPT ENG
JI Opt. Eng.
PD MAR
PY 2016
VL 55
IS 3
AR 036109
DI 10.1117/1.OE.55.3.036109
PG 5
WC Optics
SC Optics
GA DH3WS
UT WOS:000372718100026
ER
PT J
AU Dueri, D
Leve, F
Acikmese, B
AF Dueri, Daniel
Leve, Frederick
Acikmese, Behcet
TI Minimum Error Dissipative Power Reduction Control Allocation via
Lexicographic Convex Optimization for Momentum Control Systems
SO IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY
LA English
DT Article
DE Control allocation; control moment gyros; convex optimization;
interior-point method (IPM) algorithms; power reduction; reaction wheels
ID ATTITUDE-CONTROL; GYROSCOPES; MANEUVERS
AB This brief presents a convex-optimization-based real-time control allocation algorithm to optimally utilize multiple actuators on a momentum control system while explicitly considering actuator constraints. The primary objective of the allocation is to minimize torque error and improve performance when the system saturates or becomes singular. As a secondary objective, internal bearing and gear friction are exploited to reduce power usage without the need for accurate friction models. The algorithm exploits the fact that redundant control moment gyroscopes (CMGs) and the rotors of reaction wheel assemblies (RWAs) have nonsingleton minimum torque error solutions. Thus, friction in the rotors and gimbals of the CMG and RWA can be used to find a minimum power solution among the set of minimum torque error solutions. The convex optimization framework enables real-time implementable algorithms, which fully utilize control authority without requiring tuning for changes in the number or the configuration of actuators.
C1 [Dueri, Daniel; Acikmese, Behcet] Univ Texas Austin, Dept Aerosp Engn & Engn Mech, Austin, TX 78712 USA.
[Leve, Frederick] Kirtland Air Force Base, Air Force Res Lab, Albuquerque, NM 87117 USA.
RP Dueri, D; Acikmese, B (reprint author), Univ Texas Austin, Dept Aerosp Engn & Engn Mech, Austin, TX 78712 USA.; Leve, F (reprint author), Kirtland Air Force Base, Air Force Res Lab, Albuquerque, NM 87117 USA.
EM daniel.dueri@utexas.edu; afrl.rvsv@us.af.mil; behcet@austin.utexas.edu
FU Air Force Office Scientific Research [LRIR11RV15COR]; American Society
for Engineering Education Summer Faculty Fellowship Program; Office of
Naval Research [N00014-14-1-0314]
FX This work was supported in part by the following sources: Air Force
Office Scientific Research under Grant LRIR11RV15COR, the American
Society for Engineering Education Summer Faculty Fellowship Program, and
Office of Naval Research Grant No. N00014-14-1-0314. Recommended by
Associate Editor S. Varigonda.
NR 24
TC 0
Z9 0
U1 1
U2 4
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1063-6536
EI 1558-0865
J9 IEEE T CONTR SYST T
JI IEEE Trans. Control Syst. Technol.
PD MAR
PY 2016
VL 24
IS 2
BP 678
EP 686
DI 10.1109/TCST.2015.2442838
PG 9
WC Automation & Control Systems; Engineering, Electrical & Electronic
SC Automation & Control Systems; Engineering
GA DG3WY
UT WOS:000372002500026
ER
PT J
AU Brittelle, MS
Simms, JM
Sanders, ST
Gord, JR
Roy, S
AF Brittelle, Mack S.
Simms, Jean M.
Sanders, Scott T.
Gord, James R.
Roy, Sukesh
TI Fixed-wavelength H2O absorption spectroscopy system enhanced by an
on-board external-cavity diode laser
SO MEASUREMENT SCIENCE AND TECHNOLOGY
LA English
DT Article
DE spectroscopy; absorption; diode laser
ID WATER-VAPOR; COMBUSTION SYSTEMS; IC ENGINES; HIGH-SPEED; TEMPERATURE;
SENSOR; PARAMETERS; GASES; THERMOMETRY; DIAGNOSTICS
AB We describe a system designed to perform fixed-wavelength absorption spectroscopy of H2O vapor in practical combustion devices. The system includes seven wavelength-stabilized distributed feedback (WSDFB) lasers, each with a spectral accuracy of +/- 1 MHz. An on-board external cavity diode laser (ECDL) that tunes 1320-1365 nm extends the capabilities of the system. Five system operation modes are described. In one mode, a sweep of the ECDL is used to monitor each WSDFB laser wavelength with an accuracy of +/- 30 MHz. Demonstrations of fixed-wavelength thermometry at 10 kHz bandwidth in near-room-temperature gases are presented; one test reveals a temperature measurement error of similar to 0.43%.
C1 [Brittelle, Mack S.; Simms, Jean M.; Sanders, Scott T.] Univ Wisconsin, Engine Res Ctr, 1500 Engn Dr, Madison, WI 53706 USA.
[Gord, James R.] Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
[Roy, Sukesh] Spectral Energies LLC, 5100 Springfield St, Dayton, OH 45431 USA.
RP Brittelle, MS (reprint author), Univ Wisconsin, Engine Res Ctr, 1500 Engn Dr, Madison, WI 53706 USA.
EM brittelle@wisc.edu
NR 29
TC 0
Z9 0
U1 3
U2 6
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0957-0233
EI 1361-6501
J9 MEAS SCI TECHNOL
JI Meas. Sci. Technol.
PD MAR
PY 2016
VL 27
IS 3
AR 035501
DI 10.1088/0957-0233/27/3/035501
PG 10
WC Engineering, Multidisciplinary; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA DH1VZ
UT WOS:000372574300029
ER
PT J
AU Parker, GJ
Mason, KE
Regan, LA
Klaus, HD
Anex, DS
Hart, B
AF Parker, Glendon J.
Mason, Katelyn E.
Regan, Laura A.
Klaus, Haagen D.
Anex, Deon S.
Hart, Bradley
TI Unambiguous assignment of male sex to a human tooth: use of proteomics
when DNA is unavailable for sex assignment
SO AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY
LA English
DT Meeting Abstract
CT 85th Annual Meeting of the
American-Association-of-Physical-Anthropologists
CY APR 13-16, 2016
CL Atlanta, GA
SP Amer Assoc Phys Anthropologists
C1 [Parker, Glendon J.] Utah Valley Univ, Biol, Orem, UT USA.
[Mason, Katelyn E.; Anex, Deon S.; Hart, Bradley] Lawrence Livermore Natl Lab, Forens Sci Ctr, Livermore, CA USA.
[Regan, Laura A.] US Air Force Acad, Biol, Colorado Springs, CO 80840 USA.
[Klaus, Haagen D.] George Mason Univ, Sociol & Anthropol, Fairfax, VA 22030 USA.
NR 0
TC 0
Z9 0
U1 1
U2 1
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0002-9483
EI 1096-8644
J9 AM J PHYS ANTHROPOL
JI Am. J. Phys. Anthropol.
PD MAR
PY 2016
VL 159
SU 62
BP 248
EP 248
PG 1
WC Anthropology; Evolutionary Biology
SC Anthropology; Evolutionary Biology
GA DF3OW
UT WOS:000371255202051
ER
PT J
AU Ma, L
Lei, QC
Wu, Y
Xu, WJ
Ombrello, TM
Carter, CD
AF Ma, Lin
Lei, Qingchun
Wu, Yue
Xu, Wenjiang
Ombrello, Timothy M.
Carter, Campbell D.
TI From ignition to stable combustion in a cavity flameholder studied via
3D tomographic chemiluminescence at 20 kHz
SO COMBUSTION AND FLAME
LA English
DT Article
DE 3D measurements; Tomography; Fiber based endoscopes; Supersonic
combustion
ID LASER-INDUCED FLUORESCENCE; AMPLIFIED SPONTANEOUS EMISSION; MONTE-CARLO
MODEL; COMPUTED-TOMOGRAPHY; SUPERSONIC-FLOW; TEMPERATURE; ABSORPTION;
HYDROGEN; ENERGY; OH
AB This work reports the study of the ignition processes in a Mach-2 cavity combustor based on three-dimensional (3D) measurements at 20 kHz. The 3D measurements were obtained by a combination of tomographic chemiluminescence and fiber-based endoscopes. Measurements of 3D flame and flow properties were reported under two fueling conditions of the combustor. The properties included 3D volume, surface area, shape factor, and 3D3C (three-dimensional and three-component) velocity of the ignition kernel. These results dearly distinguished the ignition stage from the stable combustion stage of the combustor and enabled the determination of a transition time to quantify both stages. The analysis of the change of the ignition kernel's shape, when combined with the 3D3C velocity measurements, also illustrated flame-flow interactions in the cavity combustor. These results demonstrated the utility of the 3D diagnostics to overcome some of the limitations of established planar diagnostics and to resolve the dynamics of high-speed combustion devices both spatially and temporally. (C) 2015 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
C1 [Ma, Lin; Wu, Yue; Xu, Wenjiang] Virginia Tech, Dept Aerosp & Ocean Engn, Room 660A McBryde Hall, Blacksburg, VA 24060 USA.
[Ma, Lin; Lei, Qingchun] Virginia Tech, Dept Mech Engn, Room 660A McBryde Hall, Blacksburg, VA 24060 USA.
[Ombrello, Timothy M.; Carter, Campbell D.] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Ma, L (reprint author), Virginia Tech, Dept Aerosp & Ocean Engn, Laser Diagnost Lab, Room 660A McBryde Hall, Blacksburg, VA 24060 USA.
EM linma@vt.edu
FU U.S. Air Force Office of Scientific Research (AFOSR) [FA9550-14-1-0386];
NSF award [CBET 1156564]; U.S. Air Force Summer Faculty Fellowship
FX This work is supported by the U.S. Air Force Office of Scientific
Research (AFOSR) (grant no. FA9550-14-1-0386) with Dr. Chiping Li as the
technical monitor. Development of the imaging processing and analysis
algorithms used here was supported by an NSF award (Award CBET 1156564).
Lin Ma is also grateful for a 2014 U.S. Air Force Summer Faculty
Fellowship.
NR 36
TC 2
Z9 2
U1 5
U2 12
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0010-2180
EI 1556-2921
J9 COMBUST FLAME
JI Combust. Flame
PD MAR
PY 2016
VL 165
BP 1
EP 10
DI 10.1016/j.combustflame.2015.08.026
PG 10
WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary;
Engineering, Chemical; Engineering, Mechanical
SC Thermodynamics; Energy & Fuels; Engineering
GA DF7TV
UT WOS:000371561400001
ER
PT J
AU Grady, NR
Pitz, RW
Carter, CD
Hsu, KY
AF Grady, Nathan R.
Pitz, Robert W.
Carter, Campbell D.
Hsu, Kuang-Yu
TI Raman scattering measurements of mixing and finite-rate chemistry in a
supersonic reacting flow over a piloted, ramped cavity
SO COMBUSTION AND FLAME
LA English
DT Article
DE Raman; Scramjet; Cavity; Supersonic; Diffusion; Combustion
ID TURBINE MODEL COMBUSTOR; LARGE-EDDY SIMULATION; DIFFUSION FLAME;
CROSS-FLOW; LASER; SPECTROSCOPY; IGNITION
AB UV Raman scattering is applied to measure fuel/air mixing and combustion of a Mach-2 air stream flowing over a step-ramp cavity fueled with 70% methane/30% hydrogen. Average and RMS fluctuations of temperature and major species profiles as well as scatter plots of simultaneous temperature and chemical scalars are determined from single-shot Raman scattering measurements along a 6-mm line transverse to the main supersonic flow. In the fuel-rich regions of the pilot cavity, the 248-nm KrF laser induces broadband fluorescence interference that reduces the number of analyzable Raman spectra; nonetheless, on the whole, a significant fraction of the spectra were reducible. In the cavity, hydrogen fuel reacts quickly resulting in a uniform water concentration in the recirculation zone. Methane reacts slowly to carbon monoxide/carbon dioxide in the cavity, leading to non-uniform concentrations of these species. Mean and instantaneous mixture fraction data inside the shear layer were indicative of oxygen transport across the shear layer. Temperature, water, and oxygen fluctuations are fairly constant throughout the combustor due to recirculation/turbulent transport across the shear layer and the slow reaction of methane. (C) 2015 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
C1 [Grady, Nathan R.; Pitz, Robert W.] Vanderbilt Univ, Dept Mech Engn, Nashville, TN 37235 USA.
[Carter, Campbell D.] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Hsu, Kuang-Yu] Innovat Sci Solut Inc, Dayton, OH 45459 USA.
RP Grady, NR (reprint author), Vanderbilt Univ, Dept Mech Engn, Nashville, TN 37235 USA.
EM nrgrady@gmail.com
RI Pitz, Robert/H-7868-2016;
OI Pitz, Robert/0000-0001-6435-5618; Grady, Nathan/0000-0002-3938-3577
FU Air Force Office of Scientific Research, Combustion and Diagnostics
Program [FA9550-09-1-0205]; AFOSR Summer Faculty Fellowship
FX This research was supported by the Air Force Office of Scientific
Research, Combustion and Diagnostics Program (Julian Tishkoff, Manager
under contract no. FA9550-09-1-0205). N.R. Grady was supported by an
AFOSR Summer Faculty Fellowship. The authors also thank technicians, D.
Schommer and W. Terry, at Wright-Patterson AFB and Vanderbilt student
Jennifer Frankland for their assistance.
NR 31
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U1 2
U2 14
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0010-2180
EI 1556-2921
J9 COMBUST FLAME
JI Combust. Flame
PD MAR
PY 2016
VL 165
BP 310
EP 320
DI 10.1016/j.combustflame.2015.12.014
PG 11
WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary;
Engineering, Chemical; Engineering, Mechanical
SC Thermodynamics; Energy & Fuels; Engineering
GA DF7TV
UT WOS:000371561400023
ER
PT J
AU Islam, MN
Freeman, MJ
Peterson, LM
Ke, K
Ifarraguerri, A
Bailey, C
Baxley, F
Wager, M
Absi, A
Leonard, J
Baker, H
Rucci, M
AF Islam, Mohammed N.
Freeman, Michael J.
Peterson, Lauren M.
Ke, Kevin
Ifarraguerri, Agustin
Bailey, Christopher
Baxley, Frank
Wager, Michael
Absi, Anthony
Leonard, James
Baker, Hyatt
Rucci, Michael
TI Field tests for round-trip imaging at a 1.4 km distance with change
detection and ranging using a short-wave infrared super-continuum laser
SO APPLIED OPTICS
LA English
DT Article
ID MIDINFRARED SUPERCONTINUUM GENERATION; ZBLAN FLUORIDE FIBERS;
TIME-AVERAGED POWER; MU-M; PULSES; MODULATION; DISPERSION
AB Field tests have been conducted of a broadband illuminator for active hyperspectral imaging (HSI) using a short-wave infrared supercontinuum laser (SWIR-SCL). We demonstrated irradiance comparable to the sun for two-way measurements at a 1.4 km distance between laser and target, and performed change detection and ranging. The experimental results suggest that the range resolution of our method is similar to 1.5 cm even at the 1.4 km distance. Hence, we demonstrated the possibility to perform HSI with active broadband illumination using the SWIR-SCL. To our knowledge, this experiment is the first-ever to test two-way propagation of the active HSI illumination over a long distance. The 64 W SWIR-SCL provides near sunlight-equivalent illumination over multiple square meters, and the laser could enable HSI 24 h a day, even under a cloud cover, as well as enhanced capabilities such as change detection and ranging. (C) 2016 Optical Society of America
C1 [Islam, Mohammed N.] Univ Michigan, Ann Arbor, MI 48109 USA.
[Islam, Mohammed N.; Freeman, Michael J.; Peterson, Lauren M.; Ke, Kevin] Omni Sci Inc, Dexter, MI 48130 USA.
[Ifarraguerri, Agustin] Leidos Inc, Arlington, VA 22203 USA.
[Bailey, Christopher; Baxley, Frank; Wager, Michael] Leidos Inc, Beavercreek, OH 45431 USA.
[Absi, Anthony; Leonard, James; Baker, Hyatt; Rucci, Michael] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Islam, MN (reprint author), Univ Michigan, Ann Arbor, MI 48109 USA.; Islam, MN (reprint author), Omni Sci Inc, Dexter, MI 48130 USA.
EM mni@eecs.umich.edu
FU Air Force Research Laboratory (AFRL) [FA8650-12-D-1344]
FX Air Force Research Laboratory (AFRL) (FA8650-12-D-1344).
NR 20
TC 0
Z9 0
U1 4
U2 7
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1559-128X
EI 2155-3165
J9 APPL OPTICS
JI Appl. Optics
PD MAR 1
PY 2016
VL 55
IS 7
BP 1584
EP 1602
DI 10.1364/AO.55.001584
PG 19
WC Optics
SC Optics
GA DF4DH
UT WOS:000371297000013
PM 26974617
ER
PT J
AU Eden, PR
Meek, EC
Wills, RW
Olsen, EV
Crow, JA
Chambers, JE
AF Eden, Paul R.
Meek, Edward C.
Wills, Robert W.
Olsen, Eric V.
Crow, J. Allen
Chambers, Janice E.
TI Association of type 2 diabetes mellitus with plasma organochlorine
compound concentrations
SO JOURNAL OF EXPOSURE SCIENCE AND ENVIRONMENTAL EPIDEMIOLOGY
LA English
DT Article
DE analytical methods; biomonitoring; empirical/statistical models;
endocrine disruptors; epidemiology; pesticides
ID PERSISTENT ORGANIC POLLUTANTS; POLYCHLORINATED-BIPHENYLS; SERUM
CONCENTRATIONS; INSULIN-RESISTANCE; ADIPOSE-TISSUE; HIGH-RISK;
PESTICIDES; ADULTS; ATHEROSCLEROSIS; INDIVIDUALS
AB The increased prevalence of type 2 diabetes mellitus (T2DM) is associated with obesity, age, and sedentary lifestyle, but exposure to some organochlorine (OC) compounds has also been recently implicated. The hypothesis tested is that higher concentrations of bioaccumulative OC compounds are associated with T2DM. Plasma samples were obtained from a cross-section of adult male and female Caucasians and African Americans, either with or without T2DM from two US Air Force medical facilities. A method of extracting OC compounds from human plasma using solid phase extraction was developed, and three OC compounds [p,p'-DDE (DDE), trans-nonachlor, and oxychlordane] were quantified by gas chromatography/mass spectrometry. Multivariable logistic regression modeling indicated that increasing body mass index (BMI) was associated with T2DM in Caucasians but not in African Americans, and African Americans were more likely to have T2DM than Caucasians with decreasing odds ratios as BMI increased. An association between T2DM and increasing plasma DDE (adjusted for age, base, race, and BMI) was observed. Increasing DDE concentrations were associated with T2DM in older individuals and those with lower BMIs. Thus, in this study sample there was a higher risk of T2DM with increasing DDE concentrations in older people of normal weight and relatively lower risk associated with increasing DDE concentrations in those who are overweight or obese.
C1 [Eden, Paul R.; Meek, Edward C.; Wills, Robert W.; Crow, J. Allen; Chambers, Janice E.] Mississippi State Univ, Coll Vet Med, Ctr Environm Hlth Sci, POB 6100,240 Wise Ctr Dr, Mississippi State, MS 39762 USA.
[Olsen, Eric V.] Clin Res Lab, Med Grp 81, Keesler AFB, MS USA.
[Eden, Paul R.] 711th Human Performance Wing, Wright Patterson AFB, OH 45433 USA.
[Olsen, Eric V.] US Air Force, Sch Aerosp Med, Wright Patterson AFB, OH 45433 USA.
RP Chambers, JE (reprint author), Mississippi State Univ, Coll Vet Med, Ctr Environm Hlth Sci, POB 6100,240 Wise Ctr Dr, Mississippi State, MS 39762 USA.
EM chambers@cvm.msstate.edu
RI Dey, Kamalesh/E-6568-2017
FU Center for Environmental Health Sciences, College of Veterinary
Medicine, Mississippi State University; Keesler Air Force Base
FX We express appreciation to Dr. Matthew Ross, Dr. George Howell III,
Lauren Mangum and MaryBeth Dail of Mississippi State University for
their support in aspects of sample and data analysis and interpretation.
We also thank Ashley Iovieno at Keesler Air Force Base and Tina Thomason
at Wright-Patterson Air Force Base for their support in sample
collection and transport. This work was supported by the Center for
Environmental Health Sciences, College of Veterinary Medicine,
Mississippi State University and Keesler Air Force Base. Samples and
clinical information were provided by Keesler Air Force Base and
Wright-Patterson Air Force Base. The views expressed in this material
are those of the authors and do not reflect the official policy or
position of the US Government, the Department of Defense, or the United
States Air Force. The work herein was performed under United States Air
Force Surgeon General approved Clinical Investigation No. FKE-20100017H,
FKE-20100018E, and FWP-20100035H. The voluntary, fully informed consent
of the subjects used in this research was obtained as required by 32 CFR
219 and AFI 40-402, Protection of Human Subjects in Biomedical and
Behavioral Research. This is Center for Environmental Health Sciences
publication 131.
NR 30
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U1 5
U2 11
PU NATURE PUBLISHING GROUP
PI NEW YORK
PA 75 VARICK ST, 9TH FLR, NEW YORK, NY 10013-1917 USA
SN 1559-0631
EI 1559-064X
J9 J EXPO SCI ENV EPID
JI J. Expo. Sci. Environ. Epidemiol.
PD MAR-APR
PY 2016
VL 26
IS 2
BP 207
EP 213
DI 10.1038/jes.2014.69
PG 7
WC Environmental Sciences; Public, Environmental & Occupational Health;
Toxicology
SC Environmental Sciences & Ecology; Public, Environmental & Occupational
Health; Toxicology
GA DF6EO
UT WOS:000371448900011
PM 25335866
ER
PT J
AU Zou, XH
Szep, A
Wang, C
AF Zou, Xihua
Szep, Attila
Wang, Chao
TI Microwave Photonics: Deep Interactions between Microwaves and Lightwaves
SO OPTICAL ENGINEERING
LA English
DT Editorial Material
C1 [Zou, Xihua] Southwest Jiaotong Univ, Sch Informat Sci & Technol, Chengdu 610031, Peoples R China.
[Szep, Attila] Univ Duisburg Essen, Inst Optoelect, D-47057 Duisburg, Germany.
[Wang, Chao] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Zou, XH (reprint author), Southwest Jiaotong Univ, Sch Informat Sci & Technol, Chengdu 610031, Peoples R China.; Szep, A (reprint author), Univ Duisburg Essen, Inst Optoelect, D-47057 Duisburg, Germany.; Wang, C (reprint author), US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
EM zouxihua@swjtu.edu.cn; szepata@yahoo.com; C.Wang@kent.ac.uk
NR 0
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U1 1
U2 6
PU SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA
SN 0091-3286
EI 1560-2303
J9 OPT ENG
JI Opt. Eng.
PD MAR
PY 2016
VL 55
IS 3
AR 031101
DI 10.1117/1.OE.55.3.031101
PG 2
WC Optics
SC Optics
GA DF3YE
UT WOS:000371283700001
ER
PT J
AU Naderi, NA
Dajani, I
Flores, A
AF Naderi, Nader A.
Dajani, Iyad
Flores, Angel
TI High-efficiency, kilowatt 1034 nm all-fiber amplifier operating at 11 pm
linewidth
SO OPTICS LETTERS
LA English
DT Article
ID THRESHOLD; POWER
AB We present power scaling results of a monolithic Yb-doped 1034 nm fiber amplifier well-suited for beam combining applications. Stimulated Brillouin scattering suppression is achieved through optical linewidth broadening, and results were compared for both white noise source (WNS) and pseudo-random bit sequence (PRBS) phase modulation schemes. Notably, through PRBS modulation at a clock rate of 3.5 GHz, 1 kW of output power with a slope efficiency of 81% was demonstrated. Beam quality measurements indicated near diffraction-limited operation with no sign of modal instability. At a comparable linewidth and fiber length, power scaling viaWNS modulation yielded only 470W. The kilowatt-class output at a linewidth of 11 pm is the highest power reported for a spectrally narrow all-fiber amplifier operating at the short wavelength end of the high gain range in Yb-doped silica. (C) 2016 Optical Society of America
C1 [Naderi, Nader A.; Dajani, Iyad; Flores, Angel] US Air Force Res Lab, Directed Energy Directorate, 3550 Aberdeen Ave SE, Kirtland AFB, NM 87117 USA.
RP Naderi, NA (reprint author), US Air Force Res Lab, Directed Energy Directorate, 3550 Aberdeen Ave SE, Kirtland AFB, NM 87117 USA.
EM afrl.rdlc.sci.org@kirtland.af.mil
NR 8
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Z9 5
U1 1
U2 6
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0146-9592
EI 1539-4794
J9 OPT LETT
JI Opt. Lett.
PD MAR 1
PY 2016
VL 41
IS 5
BP 1018
EP 1021
DI 10.1364/OL.41.001018
PG 4
WC Optics
SC Optics
GA DF0KY
UT WOS:000371029100045
PM 26974105
ER
PT J
AU Wu, XF
Lee, J
Varshney, V
Wohlwend, JL
Roy, AK
Luo, TF
AF Wu, Xufei
Lee, Jonghoon
Varshney, Vikas
Wohlwend, Jennifer L.
Roy, Ajit K.
Luo, Tengfei
TI Thermal Conductivity of Wurtzite Zinc-Oxide from First-Principles
Lattice Dynamics - a Comparative Study with Gallium Nitride
SO SCIENTIFIC REPORTS
LA English
DT Article
ID GENERALIZED GRADIENT APPROXIMATION; BULK ZNO; CRYSTAL; SCATTERING;
TRANSPORT; PRESSURE; PHONONS; GAN; (ZN1-YMGY)(1-X)ALXO; EPITAXY
AB Wurtzite Zinc-Oxide (w-ZnO) is a wide bandgap semiconductor that holds promise in power electronics applications, where heat dissipation is of critical importance. However, large discrepancies exist in the literature on the thermal conductivity of w-ZnO. In this paper, we determine the thermal conductivity of w-ZnO using first-principles lattice dynamics and compare it to that of wurtzite Gallium-Nitride (w-GaN) - another important wide bandgap semiconductor with the same crystal structure and similar atomic masses as w-ZnO. However, the thermal conductivity values show large differences (400 W/mK of w-GaN vs. 50 W/mK of w-ZnO at room temperature). It is found that the much lower thermal conductivity of ZnO originates from the smaller phonon group velocities, larger three-phonon scattering phase space and larger anharmonicity. Compared to w-GaN, w-ZnO has a smaller frequency gap in phonon dispersion, which is responsible for the stronger anharmonic phonon scattering, and the weaker interatomic bonds in w-ZnO leads to smaller phonon group velocities. The thermal conductivity of w-ZnO also shows strong size effect with nano-sized grains or structures. The results from this work help identify the cause of large discrepancies in w-ZnO thermal conductivity and will provide in-depth understanding of phonon dynamics for the design of w-ZnO-based electronics.
C1 [Wu, Xufei; Luo, Tengfei] Univ Notre Dame, Aerospace & Mech Engn, Notre Dame, IN 46530 USA.
[Lee, Jonghoon; Varshney, Vikas; Wohlwend, Jennifer L.; Roy, Ajit K.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Lee, Jonghoon; Varshney, Vikas; Wohlwend, Jennifer L.] Universal Technol Corp, Dayton, OH 45342 USA.
[Luo, Tengfei] Ctr Sustainable Energy Notre Dame, Notre Dame, IN 46530 USA.
RP Luo, TF (reprint author), Univ Notre Dame, Aerospace & Mech Engn, Notre Dame, IN 46530 USA.; Luo, TF (reprint author), Ctr Sustainable Energy Notre Dame, Notre Dame, IN 46530 USA.
EM tluo@nd.edu
RI Wu, Xufei/G-5319-2016; Luo, Tengfei/A-8354-2013
OI Wu, Xufei/0000-0002-4871-1376;
FU NSF [1433490, TG-CTS100078]; Air Force Summer Faculty Fellowship; Notre
Dame Center for Research Computing
FX X.W. thanks the support by NSF (1433490). T.L. thanks the support from
the Air Force Summer Faculty Fellowship. The simulations are supported
by the Notre Dame Center for Research Computing, and NSF through XSEDE
computing resources provided by SDSC Comet and TACC Stampede under grant
number TG-CTS100078.
NR 62
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U1 14
U2 34
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 2045-2322
J9 SCI REP-UK
JI Sci Rep
PD MAR 1
PY 2016
VL 6
AR 22504
DI 10.1038/srep22504
PG 10
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA DF0WA
UT WOS:000371058700001
PM 26928396
ER
PT J
AU Hartl, DJ
Galvan, E
Malak, RJ
Baur, JW
AF Hartl, Darren J.
Galvan, Edgar
Malak, Richard J.
Baur, Jeffrey W.
TI Parameterized Design Optimization of a Magnetohydrodynamic Liquid Metal
Active Cooling Concept
SO JOURNAL OF MECHANICAL DESIGN
LA English
DT Article
ID ALLOY; MODEL; FLOW; MHD
AB The success of model-based multifunctional material design efforts relies on the proper development of multiphysical models and advanced optimization algorithms. This paper addresses both in the context of a structure that includes a liquid metal (LM) circuit for integrated cooling. We demonstrate for the first time on a complex engineering problem the use of a parameterized approach to design optimization that solves a family of optimization problems as a function of parameters exogenous to the subsystem of interest. This results in general knowledge about the capabilities of the subsystem rather than a restrictive point solution. We solve this specialized problem using the predictive parameterized Pareto genetic algorithm (P3GA) and show that it efficiently produces results that are accurate and useful for design exploration and reasoning. A "population seeding" approach allows an efficient multifidelity approach that combines a computationally efficient reduced-fidelity algebraic model with a computationally intensive finite-element model. Using data output from P3GA, we explore different design scenarios for the LM thermal management concept and demonstrate how engineers can make a final design selection once the exogenous parameters are resolved.
C1 [Hartl, Darren J.] US Air Force, Res Lab, UES Inc, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Galvan, Edgar; Malak, Richard J.] Texas A&M Univ, Dept Mech Engn, Design Syst Lab, College Stn, TX 77843 USA.
[Baur, Jeffrey W.] US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Hartl, DJ (reprint author), US Air Force, Res Lab, UES Inc, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM darren.hartl.ctr@us.af.mil; rmalak@tamu.edu; jeffery.baur@us.af.mil
FU Commander Research and Development Fund of the United States Air Force
Research Laboratory
FX This work was supported by the Commander Research and Development Fund
of the United States Air Force Research Laboratory.
NR 59
TC 1
Z9 1
U1 0
U2 4
PU ASME
PI NEW YORK
PA TWO PARK AVE, NEW YORK, NY 10016-5990 USA
SN 1050-0472
J9 J MECH DESIGN
JI J. Mech. Des.
PD MAR
PY 2016
VL 138
IS 3
AR 031402
DI 10.1115/1.4032268
PG 11
WC Engineering, Mechanical
SC Engineering
GA DD0HZ
UT WOS:000369602300005
ER
PT J
AU Coomer, RR
Lee, CW
Brockman, RA
Storage, TM
AF Coomer, R. R.
Lee, C. W.
Brockman, R. A.
Storage, T. M.
TI Development of Experimental Techniques for the Characterization of Resin
Cure Shrinkage and Thermal Expansion
SO SAMPE JOURNAL
LA English
DT Article
AB Previous work by the Air Force Research Laboratory's Composites Branch (AFRL/RXCC) has shown that knowledge of the material characteristics during cure is needed to accurately predict the spring-in behavior observed in fiber-reinforced polymer matrix composite of minimal complexity, such as L-shaped angle brackets. Sensitivity studies indicate the resin material models, particularly for cure shrinkage (CS) and coefficient of thermal expansion (CTE), are key components in successfully simulating the resultant deformation. Resin CS and CTE are tightly coupled models as they jointly define resin specific volume as a function of temperature and degree of cure. In this effort, a novel experimental approach for measuring cure shrinkage is detailed using a simple bi-material strip (BMS), comprised of a cast resin film on a thin strip of metal, and two-dimensional digital image correlation (2D DIC) to capture displacements while the strip is subjected to a specific temperature cycle. This paper will discuss the development and efficacy of the novel experimental technique in comparison with measurements gathered using volumetric dilatometry.
C1 [Coomer, R. R.; Lee, C. W.; Brockman, R. A.; Storage, T. M.] Air Force Res Lab, Wright Patterson AFB, OH USA.
[Coomer, R. R.; Lee, C. W.; Brockman, R. A.] Univ Dayton, Res Inst, Dayton, OH 45469 USA.
RP Coomer, RR (reprint author), Air Force Res Lab, Wright Patterson AFB, OH USA.; Coomer, RR (reprint author), Univ Dayton, Res Inst, Dayton, OH 45469 USA.
NR 8
TC 0
Z9 0
U1 4
U2 4
PU SAMPE PUBLISHERS
PI COVINA
PA 1161 PARKVIEW DRIVE, COVINA, CA 91722 USA
SN 0091-1062
J9 SAMPE J
JI Sampe J.
PD MAR-APR
PY 2016
VL 52
IS 2
BP 48
EP 53
PG 6
WC Engineering, Multidisciplinary; Materials Science, Multidisciplinary
SC Engineering; Materials Science
GA DE1NS
UT WOS:000370394300006
ER
PT J
AU Hua, JC
Gunaratne, GH
Talley, DG
Gord, JR
Roy, S
AF Hua, Jia-Chen
Gunaratne, Gemunu H.
Talley, Douglas G.
Gord, James R.
Roy, Sukesh
TI Dynamic-mode decomposition based analysis of shear coaxial jets with and
without transverse acoustic driving
SO JOURNAL OF FLUID MECHANICS
LA English
DT Article
DE jets; low-dimensional models; nonlinear dynamical systems
ID COHERENT STRUCTURES; PATTERN-FORMATION; LIQUID JET; NEAR-FIELD;
TURBULENCE; FLOWS
AB Modal decompositions of unperturbed and acoustically driven injector flows from shear coaxial jets are implemented using dynamic-mode decomposition, which is a natural approach in the search for collective oscillatory behaviour in nonlinear systems. Previous studies using proper orthogonal decomposition had revealed the most energetic pairs of coherent structures in injector flows. One of the difficulties in extracting lower-energy coherent structures follows from the need to differentiate robust flow constituents from noise and other irregular facets of a flow. The identification of robust features is critical for applications such as flow control as well, since only they can be used for the tasks. A dynamic-mode decomposition based algorithm for this differentiation is introduced and used to identify different classes of robust dynamic modes. They include (1) background modes located outside the injector flow that decay rapidly, (2) injector modes-including those presented in earlier studies-located in the vicinity of the flow, (3) modes that persist under acoustic driving, (4) modes responding linearly to the driving and, most interestingly, (5) a mode whose density exhibits antiphase oscillatory behaviour in the observation plane and that appears only when J, the outer-to-inner-jet momentum flux ratio, is sufficiently large; we infer that this is a projection of a mode rotating about the symmetry axis and born via a spontaneous symmetry breaking. Each of these classes of modes is analysed as J is increased, and their consequences for the flow patterns are discussed.
C1 [Hua, Jia-Chen; Gunaratne, Gemunu H.] Univ Houston, Dept Phys, Houston, TX 77204 USA.
[Talley, Douglas G.] Air Force Res Lab, Aerosp Syst Directorate, Edwards AFB, CA 93524 USA.
[Gord, James R.] Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
[Roy, Sukesh] Speciral Energies LLC, Dayton, OH 45431 USA.
RP Roy, S (reprint author), Speciral Energies LLC, Dayton, OH 45431 USA.
EM roy.sukesh@gmail.com
RI HUA, JIA-CHEN/L-9657-2016
OI HUA, JIA-CHEN/0000-0002-6591-1417
FU Air Force Research Laboratory [FA8650-13-C-2440, FA9300-13-M-1503,
88ABW-2015-3171]
FX Funding for this research was provided by the Air Force Research
Laboratory under contract nos. FA8650-13-C-2440 and FA9300-13-M-1503.
The paper has been cleared for public release by the Air Force Research
Laboratory (no. 88ABW-2015-3171).
NR 29
TC 1
Z9 1
U1 2
U2 9
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 0022-1120
EI 1469-7645
J9 J FLUID MECH
JI J. Fluid Mech.
PD MAR
PY 2016
VL 790
DI 10.1017/jfm.2016.2
PG 28
WC Mechanics; Physics, Fluids & Plasmas
SC Mechanics; Physics
GA DC8OR
UT WOS:000369479400004
ER
PT J
AU Paranjape, K
Leite, GB
Hallenbeck, PC
AF Paranjape, Kiran
Leite, Gustavo B.
Hallenbeck, Patrick C.
TI Strain variation in microalgal lipid production during mixotrophic
growth with glycerol
SO BIORESOURCE TECHNOLOGY
LA English
DT Article
DE Microalgae; Mixotrophic growth; Lipid production; Biofuels
ID WASTE-WATER TREATMENT; CHLORELLA-VULGARIS; BIOFUEL PRODUCTION; BIODIESEL
PRODUCTION; SCENEDESMUS SP; CULTIVATION; BIOMASS; ACCUMULATION;
OPTIMIZATION; REMEDIATION
AB Algal cultivation at high latitudes is challenged by the relatively low annual solar flux. One possible scenario to overcome this limitation is the use of mixotrophic growth to potentially boost biomass and lipid production. Here the effect of glycerol addition on the growth and lipid production by twelve indigenous microalgae was examined. The results show that there is considerable strain dependent variation in the maximum growth rate under mixotrophic conditions with the addition of glycerol causing in some cases up to a 2.4-fold increase in growth rate and a up to a 1.9-fold increase in biomass. In addition, glycerol increased total lipid production 40-60% in some strains. These results also show the value in screening culture collections for desired traits independent of strain identification since here one (PCH02) of the five Chlorella strains showed a large increase in lipid with glycerol. (C) 2015 Elsevier Ltd. All rights reserved.
C1 [Paranjape, Kiran; Leite, Gustavo B.; Hallenbeck, Patrick C.] Univ Montreal, Dept Microbiol Infectiol & Immunol, CP6128 Succursale Ctr Ville, Montreal, PQ H3C 3J7, Canada.
[Hallenbeck, Patrick C.] US Air Force Acad, Life Sci Res Ctr, Dept Biol, 2355 Fac Dr, Colorado Springs, CO 80840 USA.
RP Hallenbeck, PC (reprint author), Univ Montreal, Dept Microbiol Infectiol & Immunol, CP6128 Succursale Ctr Ville, Montreal, PQ H3C 3J7, Canada.
EM patrick.hallenbeck@umontreal.ca
RI Leite, Gustavo/B-7382-2014;
OI Leite, Gustavo/0000-0002-7181-1236; Hallenbeck,
Patrick/0000-0002-7640-9334
FU FQRNT (Le Fonds Quebecois de la recherche sur la nature et les
technologies), Programme de recherche en partenariat contribuant a la
sequestration des gaz a effet de serre [2011-GZ-141307]; Bioremediation
d'effluents industriel provenant de l'industrie des biocarburants via la
culture de biomasse algale mixotrophe [24198]; CRSNG-STPGP [447266-13]
FX This research was supported by grants from FQRNT (Le Fonds Quebecois de
la recherche sur la nature et les technologies), Programme de recherche
en partenariat contribuant a la sequestration des gaz a effet de serre
(2011-GZ-141307) to P.C.H. and by Bioremediation d'effluents industriel
provenant de l'industrie des biocarburants via la culture de biomasse
algale mixotrophe (Numero de reference: 24198) and CRSNG-STPGP 447266-13
Bio-oil Recovery & CO2 Recycling by Waste Stream Enhanced Microalgal
Growth & Low Energy CO2-Related Extraction, PCH co-PI.
NR 36
TC 2
Z9 2
U1 1
U2 18
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0960-8524
EI 1873-2976
J9 BIORESOURCE TECHNOL
JI Bioresour. Technol.
PD MAR
PY 2016
VL 204
BP 80
EP 88
DI 10.1016/j.biortech.2015.12.071
PG 9
WC Agricultural Engineering; Biotechnology & Applied Microbiology; Energy &
Fuels
SC Agriculture; Biotechnology & Applied Microbiology; Energy & Fuels
GA DB9FC
UT WOS:000368820800011
PM 26773947
ER
PT J
AU Lichtman, M
Reed, JH
AF Lichtman, Marc
Reed, Jeffrey H.
TI Analysis of reactive jamming against satellite communications
SO INTERNATIONAL JOURNAL OF SATELLITE COMMUNICATIONS AND NETWORKING
LA English
DT Article
DE satellite communication; electronic warfare; jamming; electronic
countermeasures
ID WIRELESS SENSOR NETWORKS; SECURITY; ATTACKS
AB In this paper, we analyze the feasibility of reactive jamming in a satellite communications scenario and propose a countermeasure that takes advantage of the constraints associated with reactive jamming. A reactive jammer is a type of jammer that has the ability to sense a portion of spectrum and immediately transmit a jamming signal when it senses a signal it wants to jam. Thus, a reactive jammer can counter the processing gain associated with frequency hopping spread spectrum. This paper provides a three-step approach to analyzing the primary constraints associated with reactive jamming, as well as detailed example scenarios (both theoretical and simulated) that demonstrate the feasibility analysis. Additional clarity is provided by splitting the analysis into uplink and downlink jamming. A strategy to mitigate the effects of reactive jamming is presented, which takes advantage of the geometric constraints of reactive jamming by using a coding and interleaving scheme that results in the transmitted bits appearing at the very beginning of each hop. This work demonstrates that reactive jamming is a valid threat to satellite communication systems. The analysis and simulation results suggest that as long as the geographical area around user terminals is free of reactive jammers, substantial mitigation can be achieved using the proposed mitigation strategy. Copyright (c) 2015John Wiley & Sons, Ltd.
C1 [Lichtman, Marc] US Air Force, Res Lab, Space Vehicles, AFRL RVSV, Kirtland AFB, NM USA.
[Reed, Jeffrey H.] Virginia Tech, Wireless Virginia Tech, Blacksburg, VA USA.
RP Lichtman, M (reprint author), US Air Force, Res Lab, Space Vehicles, AFRL RVSV, Kirtland AFB, NM USA.
EM marcll@vt.edu
FU Air Force Research Laboratory [FA9453-13-1-0237]
FX This material is based on research sponsored by the Air Force Research
Laboratory under agreement number FA9453-13-1-0237. The US Government is
authorized to reproduce and distribute reprints for governmental
purposes notwithstanding any copyright notation thereon. The views and
conclusions contained herein are those of the authors and should not be
interpreted as necessarily representing the official policies or
endorsements, either expressed or implied, of the Air Force Research
Laboratory or the US Government.
NR 28
TC 0
Z9 0
U1 2
U2 7
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1542-0973
EI 1542-0981
J9 INT J SATELL COMM N
JI Int. J. Satell. Commun. Netw.
PD MAR-APR
PY 2016
VL 34
IS 2
BP 195
EP 210
DI 10.1002/sat.1111
PG 16
WC Engineering, Aerospace; Telecommunications
SC Engineering; Telecommunications
GA DC0ZJ
UT WOS:000368946300006
ER
PT J
AU Patton, ST
Frasca, AJ
Hu, JJ
Varshney, V
Phillips, BS
Roy, AK
Voevodin, AA
AF Patton, Steven T.
Frasca, Albert J.
Hu, Jianjun
Varshney, Vikas
Phillips, Benjamin S.
Roy, Ajit K.
Voevodin, Andrey A.
TI Multiphysics characterization of multi-walled carbon nanotube
thermoplastic polyurethane polymer nanocomposites during compression
SO CARBON
LA English
DT Article
ID MECHANICAL-PROPERTIES; TEMPERATURE-DEPENDENCE; ELECTRICAL-PROPERTIES;
STRAIN SENSOR; COMPOSITES; DEFORMATION; INSTABILITIES; STRENGTH; FILMS;
LOAD
AB Multiphysics properties of polymer nanocomposites (PNCs) are of interest for polymer-based micro-electromechanical systems, tactile sensors, and flexible electronics. Coupling of mechanical (e.g., strain, stiffness, mechanical shock, etc.), electrical (e.g., resistance), and thermal (e.g., thermal expansion) effects has received little previous attention and is critical for performance and reliability. Compression experiments needed for sensitive touch sensors at low force and strain are rare with insufficient understanding of multiphysics mechanisms. This study investigates mechanical, electrical, and thermal properties of multi-walled carbon nanotube (MWCNT)/thermoplastic polyurethane PNCs during localized compression experiments. A novel correlation was established between increased electrical conduction through a spanning path(s) and higher stiffness giving insight into the mechanism of load transfer to MWCNTs. The correlation is attributed to MWCNT shell buckling-induced growth in the real area of contact between the metal contact electrodes and the PNC that occurs when a spanning path is compressed and begins to conduct electric current. Modulating electric current and power dissipation in a contact shows PNC thickness modulation, where higher power results in localized PNC elongation. The observed PNC thickness modulation is attributed to thermal expansion of the polymer. (C) 2015 Elsevier Ltd. All rights reserved.
C1 [Patton, Steven T.; Hu, Jianjun] Univ Dayton, Res Inst, Dayton, OH 45469 USA.
[Frasca, Albert J.; Varshney, Vikas] Universal Technol Corp, Beavercreek, OH 45432 USA.
[Phillips, Benjamin S.; Roy, Ajit K.; Voevodin, Andrey A.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Patton, ST (reprint author), Univ Dayton, Res Inst, Dayton, OH 45469 USA.
EM steven.patton.2.ctr@us.af.mil
FU Air Force Research Laboratory Materials and Manufacturing Directorate
FX This work was supported by the Air Force Research Laboratory Materials
and Manufacturing Directorate. The authors thank Richard Vaia, Hilmar
Koerner, and John Kelley of AFRL/RX for sample fabrication and technical
discussions. The authors thank John Ferguson of the Air Force Research
Laboratory Materials and Manufacturing Directorate (AFRL/RX) and
Sangwook Sihn and Sergei Shenogin of the University of Dayton Research
Institute for useful discussions.
NR 61
TC 1
Z9 1
U1 4
U2 49
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0008-6223
EI 1873-3891
J9 CARBON
JI Carbon
PD MAR
PY 2016
VL 98
BP 638
EP 648
DI 10.1016/j.carbon.2015.11.051
PG 11
WC Chemistry, Physical; Materials Science, Multidisciplinary
SC Chemistry; Materials Science
GA CZ6TD
UT WOS:000367233000079
ER
PT J
AU Zhao, T
Jarrett, JW
Johnson, JS
Park, K
Vaia, RA
Knappenberger, KL
AF Zhao, Tian
Jarrett, Jeremy W.
Johnson, Jeffrey S.
Park, Kyoungweon
Vaia, Richard A.
Knappenberger, Kenneth L., Jr.
TI Plasmon Dephasing in Gold Nanorods Studied Using Single-Nanoparticle
Interferometric Nonlinear Optical Microscopy
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID PHASE-LOCKED PULSES; 2-PHOTON PHOTOLUMINESCENCE; METAL NANOSTRUCTURES;
QUANTUM YIELD; DYNAMICS; LUMINESCENCE; SPECTROSCOPY; HYBRIDIZATION;
SCATTERING
AB We report the polarization-dependent and time resolved photoluminescence (PL) properties of gold nanorods (AuNRs). AuNRs corresponding to three different length-to diameter aspect ratios (AR)-1.86, 2.91, and 3.90-were examined using single-nanorod spectroscopy and imaging; the nanorod volume was approximately constant over the three sample types. For each AuNR, an aspect ratio-independent transverse plasmon resonance (TSPR) was detected at 2.41 eV. Aspect-ratio-dependent longitudinal surface plasmon resonances (LSPRs) were observed at 2.08 +/- 0.19 eV, 1.76 +/- 0.12 eV, and 1.53 +/- 0.15 eV for the 1.86-AR, 2.91-AR, and 3.90-AR samples, respectively. On the basis of both excitation and emission polarization-resolved two-photon photoluminescence (TPPL) measurements, AuNR PL emission proceeded by plasmon-mediated radiative electron hole recombination. The resonant LSPR mode frequencies of the nanorods were determined from interferometrically detected TPPL signals. For these measurements, the interpulse time delays of a spectrally broad laser pulse (1.48-1.65 eV) were changed systematically with attosecond time resolution, and the TPPL signal amplitude was recorded. The 1.86-AR AuNR did not support a plasmon mode that was resonant within the laser bandwidth, whereas the 2.91-AR and 3.90-AR samples had LSPR frequencies that overlapped the high- and low-energy components of the excitation pulse. The LSPR frequencies were obtained by Fourier transformation of the time-domain TPPL data and compared to dark-field scattering spectra. The accuracy of the interferometric TPPL measurement for recovering plasmon resonance frequencies was confirmed by polarization-dependent measurements; alignment of the laser electric field parallel to the nanorod major axis was LSPR resonant, whereas projection of the laser pulse into an orthogonal plane was not. Finally, dephasing times (T-2) for resonant plasmon modes were extracted from analysis of interferometric TPPL and second harmonic generation data. These results showed that the dephasing time increased from 22 +/- 4 to 31 +/- 9 fs as the LSPR resonance energy decreased from 1.76 to 1.53 eV, as a result of less efficient plasmon dephasing due to interband scattering for lower energy resonances. These results demonstrate the capability of interferometric nonlinear optical imaging with single-nanostructure sensitivity for determining structure-specific dephasing times, which influence the efficiency of metal nanoparticle light-harvesting applications. Therefore, interferometric nonlinear optical (NLO) imaging is likely to make a significant impact on the rational design of photonic nanostructures.
C1 [Zhao, Tian; Jarrett, Jeremy W.; Johnson, Jeffrey S.; Knappenberger, Kenneth L., Jr.] Florida State Univ, Dept Chem & Biochem, Tallahassee, FL 32306 USA.
[Park, Kyoungweon; Vaia, Richard A.] Air Force Res Lab, 2941 Hobson Way, Wright Patterson AFB, OH 45433 USA.
RP Knappenberger, KL (reprint author), Florida State Univ, Dept Chem & Biochem, Tallahassee, FL 32306 USA.
EM klk@chem.fsu.edu
OI Jarrett, Jeremy/0000-0003-1308-1519
FU Air Force Office of Scientific Research [FA-9550-15-1-0114]
FX This manuscript is based on work supported by the Air Force Office of
Scientific Research, through grant number FA-9550-15-1-0114.
NR 36
TC 2
Z9 2
U1 11
U2 41
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD FEB 25
PY 2016
VL 120
IS 7
BP 4071
EP 4079
DI 10.1021/acs.jpcc.5b11008
PG 9
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA DF1MR
UT WOS:000371104400056
ER
PT J
AU Konkova, T
Valeev, I
Mironov, S
Korznikov, A
Korznikova, G
Myshlyaev, MM
Semiatin, SL
AF Konkova, T.
Valeev, I.
Mironov, S.
Korznikov, A.
Korznikova, G.
Myshlyaev, M. M.
Semiatin, S. L.
TI Microstructure response of cryogenically-rolled Cu-30Zn brass to
electric-current pulsing
SO JOURNAL OF ALLOYS AND COMPOUNDS
LA English
DT Article
DE Cu-30Zn brass; Electric-current pulses; Cryogenic deformation; Electron
backscatter diffraction; Grain structure; Texture
ID GRAIN-STRUCTURE EVOLUTION; COPPER SINGLE-CRYSTALS; ELECTROPULSING
TREATMENT; MECHANICAL-PROPERTIES; ALPHA-BRASS; PLASTIC-DEFORMATION;
CURRENT PULSES; BEHAVIOR; CU; RECRYSTALLIZATION
AB The effect of transient electric-current pulses (ECP) on the evolution of microstructure and texture of cryogenically-rolled Cu-30Zn brass was determined. The pulsing was shown to lead to recrystallization followed by grain growth. The mean grain size in the recrystallized material was 0.5 mu m, thus indicating that cryogenic rolling coupled with ECP is suitable for the production of an ultrafine-grain microstructure in Cue30Zn brass. The differences in the recrystallization texture in pulsed versus statically-annealed conditions suggested a distinct recrystallization mechanism during ECP. (C) 2015 Elsevier B.V. All rights reserved.
C1 [Konkova, T.; Valeev, I.; Mironov, S.; Korznikov, A.; Korznikova, G.] Russian Acad Sci, Inst Met Superplast Problems, Ufa 450001, Russia.
[Konkova, T.] Univ Strathclyde, Adv Forming Res Ctr, Inchinnan PA4 9LJ, Renfrew, Scotland.
[Mironov, S.] Tohoku Univ, Grad Sch Engn, Dept Mat Proc, Sendai, Miyagi 9808579, Japan.
[Korznikov, A.] Natl Res Tomsk State Univ, Tomsk 634050, Russia.
[Myshlyaev, M. M.] Russian Acad Sci, Baikov Inst Met & Mat Sci, Moscow 119991, Russia.
[Myshlyaev, M. M.] Russian Acad Sci, Inst Solid State Phys, Chernogolovka 142432, Moscow Oblast, Russia.
[Semiatin, S. L.] AFRL RXCM, Mat & Mfg Directorate, Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Mironov, S (reprint author), Tohoku Univ, Grad Sch Engn, Dept Mat Proc, 6-6-02 Aramaki Aza Aoba, Sendai, Miyagi 9808579, Japan.
EM smironov@material.tohoku.ac.jp
RI Korznikov, Alexander/F-1473-2014; SEMIATIN, SHELDON/E-7264-2017;
OI Korznikova, Galiya/0000-0001-6646-7357
FU Russian Fund for Fundamental Research [14-02-97004]
FX Financial support from the Russian Fund for Fundamental Research
(project No. 14-02-97004) is gratefully acknowledged. The authors are
grateful to P. Klassman for technical assistance during cryogenic
rolling.
NR 35
TC 1
Z9 1
U1 8
U2 32
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0925-8388
EI 1873-4669
J9 J ALLOY COMPD
JI J. Alloy. Compd.
PD FEB 25
PY 2016
VL 659
BP 184
EP 192
DI 10.1016/j.jallcom.2015.11.059
PG 9
WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy &
Metallurgical Engineering
SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering
GA CZ2OI
UT WOS:000366944100026
ER
PT J
AU Hallenbeck, PC
Liu, Y
AF Hallenbeck, Patrick C.
Liu, Yuan
TI Recent advances in hydrogen production by photosynthetic bacteria
SO INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
LA English
DT Article; Proceedings Paper
CT Asian Biohydrogen and Biorefinery Symposium (ABBS)
CY DEC 16-18, 2014
CL Melaka, MALAYSIA
DE Biological hydrogen production; Photosynthetic bacteria;
Photofermentation; Energy from wastes; Improving rates and yields
ID SINGLE-STAGE PHOTOFERMENTATION; RHODOBACTER-SPHAEROIDES KD131;
RHODOPSEUDOMONAS-PALUSTRIS WP3-5; RESPONSE-SURFACE METHODOLOGY; H-2
PRODUCTION; DEFICIENT MUTANT; SEQUENTIAL DARK; BIOHYDROGEN PRODUCTION;
PHOTO FERMENTATION; PHB ACCUMULATION
AB The photosynthetic bacteria have a very versatile metabolic repertoire and have been known for decades to produce hydrogen during photofermentative growth. Here, recent advances in hydrogen production by these organisms are reviewed and future directions highlighted. Often used as a second stage in two stage hydrogen production processes; first stage fermentative sugar to hydrogen and organic acids; second stage, organic acids to hydrogen, recent studies have highlighted their ability to directly convert sugars to hydrogen. Several studies have attempted to optimize a single stage batch process and these, and a study with continuous cultures have shown that yields approaching 9 mol H-2/mol glucose can be obtained. One of the drawbacks of this system is the dependency on light, necessitating the use of photobioreactors, thus potentially greatly adding to the cost of such a system. In another approach which avoids the use of light energy, microaerobic fermentation of organic acids to hydrogen, driven by limited oxidative phosphorylation has been demonstrated in principle. Further advances will probably require the use of metabolic engineering and more sophisticated process controls in order to achieve higher stoichiometries, approaches that might be applied to other, light dependent, hydrogen production process by these organisms. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
C1 [Hallenbeck, Patrick C.] US Air Force Acad, Dept Biol, Life Sci Res Ctr, 2355 Fac Dr, Colorado Springs, CO 80840 USA.
[Hallenbeck, Patrick C.; Liu, Yuan] Univ Montreal, Dept Microbiol Infect Dis & Immunol, CP 6128 Succursale Ctr Ville, Montreal, PQ H3C 3J7, Canada.
RP Hallenbeck, PC (reprint author), Univ Montreal, Dept Microbiol Infect Dis & Immunol, CP 6128 Succursale Ctr Ville, Montreal, PQ H3C 3J7, Canada.
EM patruck.hallenbeck.ctr@usafa.edu
OI Hallenbeck, Patrick/0000-0002-7640-9334
NR 59
TC 7
Z9 7
U1 9
U2 36
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0360-3199
EI 1879-3487
J9 INT J HYDROGEN ENERG
JI Int. J. Hydrog. Energy
PD FEB 23
PY 2016
VL 41
IS 7
BP 4446
EP 4454
DI 10.1016/j.ijhydene.2015.11.090
PG 9
WC Chemistry, Physical; Electrochemistry; Energy & Fuels
SC Chemistry; Electrochemistry; Energy & Fuels
GA DG9BP
UT WOS:000372378100036
ER
PT J
AU Makri, E
Smith, K
Chabanov, A
Vitebskiy, I
Kottos, T
AF Makri, Eleana
Smith, Kyle
Chabanov, Andrey
Vitebskiy, Ilya
Kottos, Tsampikos
TI Hypersensitive Transport in Photonic Crystals with Accidental Spatial
Degeneracies
SO SCIENTIFIC REPORTS
LA English
DT Article
ID INDUCED-TRANSMISSION FILTERS; OPTICAL LIMITER; SEMICONDUCTORS;
PERFORMANCE; SILICON; SYSTEMS; DESIGN
AB A localized mode in a photonic layered structure can develop nodal points (nodal planes), where the oscillating electric field is negligible. Placing a thin metallic layer at such a nodal point results in the phenomenon of induced transmission. Here we demonstrate that if the nodal point is not a point of symmetry, then even a tiny alteration of the permittivity in the vicinity of the metallic layer drastically suppresses the localized mode along with the resonant transmission. This renders the layered structure highly reflective within a broad frequency range. Applications of this hypersensitive transport for optical and microwave limiting and switching are discussed.
C1 [Makri, Eleana; Kottos, Tsampikos] Wesleyan Univ, Dept Phys, Middletown, CT 06459 USA.
[Smith, Kyle; Chabanov, Andrey] Univ Texas San Antonio, Dept Phys & Astron, San Antonio, TX 78249 USA.
[Vitebskiy, Ilya] Air Force Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
RP Kottos, T (reprint author), Wesleyan Univ, Dept Phys, Middletown, CT 06459 USA.
EM tkottos@wesleyan.edu
FU AFOSR [LRIR09RY04COR, FA9550-16-1-0058]; MURI [FA9550-14-1-0037]
FX We acknowledge AFOSR support from the portfolio of Dr. A. Nachman via
LRIR09RY04COR Grant (I. V.) and MURI No. FA9550-14-1-0037 (E.M., T.K.).
(A.C.) acknowledges AFOSR support from the portfolio of Dr. A. Sayir via
FA9550-16-1-0058 Grant.
NR 26
TC 2
Z9 2
U1 2
U2 6
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 2045-2322
J9 SCI REP-UK
JI Sci Rep
PD FEB 23
PY 2016
VL 6
AR 22169
DI 10.1038/srep22169
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA DE5RA
UT WOS:000370687700001
PM 26903232
ER
PT J
AU Ullrich, B
Xi, H
Wang, JS
AF Ullrich, B.
Xi, H.
Wang, J. S.
TI Photoluminescence limiting of colloidal PbS quantum dots
SO APPLIED PHYSICS LETTERS
LA English
DT Article
AB The exposure of colloidal 2 nm PbS quantum dots to growing continuous wave laser excitation at 532 nm increases the photoluminescence intensity with the square root of the optical stimulus. The results herein in conjunction with previous findings [B. Ullrich and H. Xi, Opt. Lett. 38, 4698 (2013)] advocate the square root trend to be the general limiting function for photo-carrier transport and emission of optically excited nano-sized materials. We further show that the excitation of one electron-hole pair per quantum dot defines the saturation threshold for photoluminescence intensity and dynamic band filling. (C) 2016 AIP Publishing LLC.
C1 [Ullrich, B.] Univ Nacl Autonoma Mexico, Inst Ciencias Fis, Cuernavaca 62210, Morelos, Mexico.
[Ullrich, B.] Ullrich Photon LLC, Wayne, OH 43466 USA.
[Xi, H.] Bowling Green State Univ, Dept Phys & Astron, Bowling Green, OH 43403 USA.
[Wang, J. S.] US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Ullrich, B (reprint author), Univ Nacl Autonoma Mexico, Inst Ciencias Fis, Cuernavaca 62210, Morelos, Mexico.; Ullrich, B (reprint author), Ullrich Photon LLC, Wayne, OH 43466 USA.
EM bruno.ullrich@yahoo.com
FU DGAPA-UNAM PAPIIT Project [TB100213-RR170213]
FX The work was financially supported by the DGAPA-UNAM PAPIIT Project
TB100213-RR170213 (PI Bruno Ullrich). The authors acknowledge the
technical support of R. Garcia and U. Amaya at ICF.
NR 19
TC 0
Z9 0
U1 5
U2 9
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD FEB 22
PY 2016
VL 108
IS 8
AR 083110
DI 10.1063/1.4942608
PG 3
WC Physics, Applied
SC Physics
GA DH8PO
UT WOS:000373057000046
ER
PT J
AU Ward, B
AF Ward, Benjamin
TI Theory and modeling of photodarkening-induced quasi static degradation
in fiber amplifiers
SO OPTICS EXPRESS
LA English
DT Article
ID YB DOPED FIBERS; INSTABILITY THRESHOLD; MODAL INSTABILITIES; GAIN
SATURATION; LASER SYSTEMS; POWER; MITIGATION; ORIGIN; IMPACT
AB A theory of photodarkening-induced quasi-static degradation in fiber amplifiers is presented. As the doped core of a fiber photodarkens and continues to absorb more power converting it to heat, the intensity grating created by higher order mode interference with the fundamental mode moves toward the input end. This creates a persistent absorption grating that remains phase-shifted from the modal interference pattern. This leads to power transfer from the fundamental mode to a higher order mode with a very small frequency offset that occurs on a time scale of minutes to hours. This process is modeled in large mode area step index and photonic crystal fibers and is found to produce reasonable threshold values. (C) 2016 Optical Society of America
C1 [Ward, Benjamin] US Air Force Acad, Dept Phys, 2354 Fairchild Dr Ste 2A31, Colorado Springs, CO 80840 USA.
RP Ward, B (reprint author), US Air Force Acad, Dept Phys, 2354 Fairchild Dr Ste 2A31, Colorado Springs, CO 80840 USA.
EM benjamin.ward.1@us.af.mil
FU DoD High Energy Laser Joint Technology Office; Army Research Office
FX The author would like to thank the anonymous reviewers of this paper
that provided very detailed and constructive feedback. The final product
is significantly improved due to their input. The author would like to
acknowledge a grant of computational time from the DoD High Performance
Computing Modernization Program, and funding support provided by the DoD
High Energy Laser Joint Technology Office, and funded through the Army
Research Office. The views expressed in this article are those of the
author and do not reflect the official policy or position of the US
government or the Department of Defense. Distribution A: Approved for
public release, distribution unlimited.
NR 25
TC 5
Z9 5
U1 4
U2 8
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1094-4087
J9 OPT EXPRESS
JI Opt. Express
PD FEB 22
PY 2016
VL 24
IS 4
BP 3488
EP 3501
DI 10.1364/OE.24.003488
PG 14
WC Optics
SC Optics
GA DF5ZQ
UT WOS:000371433700030
PM 26907007
ER
PT J
AU McDaniel, SA
Lancaster, A
Evans, JW
Kar, AK
Cook, G
AF McDaniel, Sean A.
Lancaster, Adam
Evans, Jonathan W.
Kar, Ajoy K.
Cook, Gary
TI Power scaling of ultrafast laser inscribed waveguide lasers in chromium
and iron doped zinc selenide
SO OPTICS EXPRESS
LA English
DT Article
ID FIBER LASER; ZNSE; CDTE; NM
AB We report demonstration of Watt level waveguide lasers fabricated using Ultrafast Laser Inscription (ULI). The waveguides were fabricated in bulk chromium and iron doped zinc selenide crystals with a chirped pulse Yb fiber laser. The depressed cladding structure in Fe:ZnSe produced output powers of 1 W with a threshold of 50 mW and a slope efficiency of 58%, while a similar structure produced 5.1 W of output in Cr:ZnSe with a laser threshold of 350 mW and a slope efficiency of 41%. These results represent the current state-of-the-art for ULI waveguides in zinc based chalcogenides. (C) 2016 Optical Society of America
C1 [McDaniel, Sean A.] Leidos Inc, 3745 Pentagon Blvd, Beavercreek, OH 45431 USA.
[Lancaster, Adam; Kar, Ajoy K.] Heriot Watt Univ, Inst Photon & Quantum Sci, Edinburgh EH14 4AS, Midlothian, Scotland.
[McDaniel, Sean A.; Evans, Jonathan W.; Cook, Gary] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP McDaniel, SA (reprint author), Leidos Inc, 3745 Pentagon Blvd, Beavercreek, OH 45431 USA.; McDaniel, SA (reprint author), Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
EM sean.a.mcdaniel@leidos.com
FU U.S. Air Forces and Sensors directorate [FA8650-12-D-1377]; EOARD
[FA8655-1-3026]; EPSRC [EP/G030227/1, EP/K502844/1]
FX This work was funded by the U.S. Air Forces and Sensors directorate
(contract FA8650-12-D-1377), EOARD (Grant Number FA8655-1-3026), and
EPSRC (Grant number EP/G030227/1). A. Lancaster acknowledges support
from EPSRC studentship EP/K502844/1. Sean McDaniel, Gary Cook and
Jonathan Evans thank Patrick Berry and Ronald Stites of AFRL for
valuable technical discussion.
NR 25
TC 1
Z9 1
U1 9
U2 17
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1094-4087
J9 OPT EXPRESS
JI Opt. Express
PD FEB 22
PY 2016
VL 24
IS 4
BP 3502
EP 3512
DI 10.1364/OE.24.003502
PG 11
WC Optics
SC Optics
GA DF5ZQ
UT WOS:000371433700031
PM 26907008
ER
PT J
AU Brown, RB
Firth, JA
AF Brown, Robert B.
Firth, Jordan A.
TI Analysis of trans-Neptunian objects and a proposed theory to explain
their origin
SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
LA English
DT Article
DE celestial mechanics; Kuiper belt: general; minor planets, asteroids:
general
ID KUIPER-BELT; SOLAR-SYSTEM; OORT CLOUD; ORBITS; ENCOUNTERS; BINARIES;
SEDNA
AB Current theories cannot explain how trans-Neptunian objects (TNOs) either formed in situ or how ultrawide trans-Neptunian binaries (TNBs) exist if they were formed closer to the Sun and were later dispersed during Neptune's migration. Furthermore, no theory can adequately explain the documented clustering of omega near 0 degrees for TNOs with a > 150 au. Here, we show that not only is omega clustered for the nine long-period TNOs (LPTNOs) with a > 200 au, but Omega is also grouped almost as closely. Neither of these orbital elements is randomly distributed for any collection of TNOs investigated, including those that are not in resonance with Neptune, those with q > 30 au, q > 44 au, and LPTNOs. Every frequency distribution of omega and Omega indicates that many TNOs were recently affected by Neptune. Based on this study, we propose that TNOs were inside Neptune's orbit in the last few Myr. The TNOs then migrated outwards in a relatively short time period. Ultrawide TNBs never came close to Neptune during this migration, allowing these fragile pairs to remain intact. However, many other TNOs were perturbed as they passed Neptune, resulting in the distribution of orbital elements we see today for all TNOs, including those in the Kuiper belt and the LPTNOs.
C1 [Brown, Robert B.; Firth, Jordan A.] US Air Force Acad, Dept Astronaut, 2354 Fairchild Dr,Suite 6H-223, Colorado Springs, CO 80840 USA.
RP Brown, RB (reprint author), US Air Force Acad, Dept Astronaut, 2354 Fairchild Dr,Suite 6H-223, Colorado Springs, CO 80840 USA.
EM robert.brown@usafa.edu
FU USAF Academy
FX We would like to thank the anonymous referee for his/her helpful and
prompt review of this paper. We also want to thank the USAF Academy for
its support. This document is for information only. No US Government
commitment to sell, loan, lease, co-develop, or co-product defence
articles or provide defence services is implied or intended.
NR 30
TC 4
Z9 4
U1 1
U2 2
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0035-8711
EI 1365-2966
J9 MON NOT R ASTRON SOC
JI Mon. Not. Roy. Astron. Soc.
PD FEB 21
PY 2016
VL 456
IS 2
BP 1587
EP 1594
DI 10.1093/mnras/stv2818
PG 8
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA DG7KW
UT WOS:000372264200032
ER
PT J
AU Stewart, DJ
Dalton, MJ
Long, SL
Kannan, R
Yu, ZN
Cooper, TM
Haley, JE
Tan, LS
AF Stewart, David J.
Dalton, Matthew J.
Long, Stephanie L.
Kannan, Ramamurthi
Yu, Zhenning
Cooper, Thomas M.
Haley, Joy E.
Tan, Loon-Seng
TI Steric hindrance inhibits excited-state relaxation and lowers the extent
of intramolecular charge transfer in two-photon absorbing dyes
SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS
LA English
DT Article
ID STRUCTURE-PROPERTY RELATIONSHIPS; DUAL FLUORESCENCE; PHOTOPHYSICAL
PROPERTIES; FLUORENE DERIVATIVES;
1-TERT-BUTYL-6-CYANO-1,2,3,4-TETRAHYDROQUINOLINE NTC6; ABSORPTION
PROPERTIES; OPTICAL-PROPERTIES; PRODAN POSSESS; CHROMOPHORES; MOLECULES
AB The two-photon absorbing dye AF240 [1, (7-benzothiazol-2-yl-9,9-diethylfluoren-2-yl)diphenylamine] is modified by adding bulky alkyl groups to the diphenylamino moiety. Three new compounds are synthesized which have ethyl groups in both ortho positions of each phenyl ring (2), t-butyl groups in one ortho position of each phenyl ring (3), and t-butyl groups in the para position of each phenyl ring (4). The dyes are examined in several aprotic solvents with varying polarity to observe the effects of the sterically hindering bulky groups on the ground and excited-state photophysical properties. While the ground state shows minimal solvent dependence, there is significant dependence on the fluorescence quantum yield and lifetime, as well as the excited-state energy levels. This effect is caused by the formation of an intramolecular charge-transfer (ICT) state, which is observed in the solvents more polar than n-hexane and supported by TD-DFT calculations. Electronic effects of ortho or para alkyl substitution should be similar, yet drastic differences are observed. A red shift in the fluorescence maximum is observed in 4 relative to 1, yet a blue shift occurs in 2 and 3 because the substituents at the sterically sensitive ortho-positions inhibit excited-state geometric relaxation and result in less ICT character than 1. Coupled with theoretical calculations, the data support a planar ICT (PICT) excited state where the diphenylamino nitrogen in an sp(2)-like geometry is integral with the plane containing the fluorene and benzothiazole moieties. Ultrafast transient absorption experiments show that ICT occurs rapidly (<150 fs) followed by geometric and solvent relaxation in similar to 1-4 ps to form the PICT or solvent-stabilized ICT (SSICT) state. This relaxation is not observed in non-polar n-hexane because the solvent dependent ICT state energy lies higher than the locally-excited (LE) state. Finally, formation of a triplet state (T-1) is only efficiently observed in n-hexane for all four dyes.
C1 [Stewart, David J.; Dalton, Matthew J.; Long, Stephanie L.; Kannan, Ramamurthi; Yu, Zhenning; Cooper, Thomas M.; Haley, Joy E.; Tan, Loon-Seng] Air Force Res Lab, Funct Mat Div, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Stewart, David J.] Gen Dynam Informat Technol, 5100 Springfield Pike, Dayton, OH 45431 USA.
[Long, Stephanie L.] Southwestern Ohio Council Higher Educ, Dayton, OH 45420 USA.
[Kannan, Ramamurthi; Yu, Zhenning] UES Inc, 4401 Dayton Xenia Rd, Dayton, OH 45432 USA.
RP Stewart, DJ; Haley, JE (reprint author), Air Force Res Lab, Funct Mat Div, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.; Stewart, DJ (reprint author), Gen Dynam Informat Technol, 5100 Springfield Pike, Dayton, OH 45431 USA.
EM david.stewart.32.ctr@us.af.mil; joy.haley.1@us.af.mil
RI Tan, Loon-Seng/F-6985-2012
OI Tan, Loon-Seng/0000-0002-2134-9290
FU AFRL/AFOSR; AFRL/RX Directorates, Air Force Research Laboratory
FX Funding support was provided by AFRL/AFOSR and AFRL/RX Directorates, Air
Force Research Laboratory.
NR 71
TC 2
Z9 2
U1 7
U2 26
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1463-9076
EI 1463-9084
J9 PHYS CHEM CHEM PHYS
JI Phys. Chem. Chem. Phys.
PD FEB 21
PY 2016
VL 18
IS 7
BP 5587
EP 5596
DI 10.1039/c5cp07716h
PG 10
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA DE1XZ
UT WOS:000370421500057
PM 26862976
ER
PT J
AU Semiatin, SL
Zhang, F
Larsen, R
Chapman, LA
Furrer, DU
AF Semiatin, S. L.
Zhang, F.
Larsen, R.
Chapman, L. A.
Furrer, D. U.
TI Precipitation in powder-metallurgy, nickel-base superalloys: review of
modeling approach and formulation of engineering methods to determine
input data
SO INTEGRATING MATERIALS AND MANUFACTURING INNOVATION
LA English
DT Review
DE Precipitation; Superalloys; Gamma prime; Nucleation; Growth; Coarsening;
Solvus approach curve; Interface energy; Free energy of transformation;
Diffusivity
ID PHASE-FIELD METHOD; PARTICLE DIFFUSION PROBLEM; AT-PERCENT AL;
MULTICOMPONENT ALLOYS; VOLUME FRACTION; CR ALLOY; NUCLEATION; EVOLUTION;
KINETICS; TRANSFORMATIONS
AB Methods for determining the various thermodynamic and kinetic parameters required for the modeling of gamma' precipitation in powder-metallurgy (PM), nickel-base superalloys are summarized. These parameters comprise the composition of the gamma' phase, the gamma' solvus temperature/equilibrium solvus approach curve, the free energy (Delta G*) associated with the decomposition of the. matrix to form gamma', the gamma/gamma' interfacial energy sigma, and an effective diffusivity for use in nucleation, growth, and coarsening calculations. Techniques to obtain the material data include phase extraction (for the average composition of gamma') and heat-treatment/quantitative metallography (for a two-parameter fit of the solvus approach curve). With regard to Delta G*, two methods, one based on the instantaneous composition of the gamma and gamma' phases and the other on the enthalpy of transformation and the solvus temperature, are summarized. It is shown that the interfacial energy s can be determined from the nucleation-onset temperature as indicated by on-cooling specific-heat measurements. Last, the use of a limited set of static-coarsening measurements to estimate the effective diffusivity is described. The application of the various protocols is illustrated for typical first-, second-, and third-generation PM superalloys, i.e., IN-100, Rene 88, and LSHR/ME3, respectively.
C1 [Semiatin, S. L.] Air Force Res Lab, Mat & Mfg Directorate, AFRL RXCM, Wright Patterson AFB, OH 45433 USA.
[Zhang, F.] CompuTherm LLC, Madison, WI 53719 USA.
[Larsen, R.] Thermophys Properties Res Lab Inc, W Lafayette, IN 47906 USA.
[Chapman, L. A.] Natl Phys Lab, Teddington TW11 0LW, Middx, England.
[Furrer, D. U.] Pratt & Whitney, 400 Main St, E Hartford, CT 06118 USA.
RP Semiatin, SL (reprint author), Air Force Res Lab, Mat & Mfg Directorate, AFRL RXCM, Wright Patterson AFB, OH 45433 USA.
EM sheldon.semiatin@us.af.mil
NR 64
TC 2
Z9 2
U1 2
U2 7
PU SPRINGER HEIDELBERG
PI HEIDELBERG
PA TIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANY
SN 2193-9764
EI 2193-9772
J9 INTEGR MATER MANUF I
JI Integr. Mater. Manuf. Innov.
PD FEB 15
PY 2016
VL 5
AR 3
DI 10.1186/s40192-016-0046-3
PG 20
WC Materials Science, Multidisciplinary
SC Materials Science
GA DO7SU
UT WOS:000377984100001
ER
PT J
AU Gao, Z
Thompson, BJ
Ragunathan, G
Johnson, MT
Rout, B
Choquette, KD
AF Gao, Zihe
Thompson, Bradley J.
Ragunathan, Gautham
Johnson, Matthew T.
Rout, Bibhudutta
Choquette, Kent D.
TI Bottom-Emitting Coherently Coupled Vertical Cavity Laser Arrays
SO IEEE PHOTONICS TECHNOLOGY LETTERS
LA English
DT Article
DE Surface-emitting lasers; phased arrays; semiconductor laser arrays
ID IN-PHASE
AB Two-dimensional coherently coupled photonic crystal ion-implanted bottom emitting vertical cavity surface emitting laser arrays are demonstrated. Subthreshold luminescence shows uniform current injection below threshold, benefiting from the improved contact alignment compared with the top emitting arrays. In-phase operation has been achieved in 2x2 and 3x3 arrays at lasing threshold. A remaining challenge is achieving uniform current distribution above lasing threshold for larger arrays due to the variation of series resistance through each of the elements of the arrays.
C1 [Gao, Zihe; Thompson, Bradley J.; Choquette, Kent D.] Univ Illinois, Dept Elect & Comp Engn, Urbana, IL 61801 USA.
[Ragunathan, Gautham] MicroLink Devices Inc, Niles, IL 60714 USA.
[Johnson, Matthew T.] US Air Force Acad, Randolph AFB, TX 78150 USA.
[Rout, Bibhudutta] Univ N Texas, Denton, TX 76203 USA.
RP Gao, Z; Thompson, BJ; Choquette, KD (reprint author), Univ Illinois, Dept Elect & Comp Engn, Urbana, IL 61801 USA.; Ragunathan, G (reprint author), MicroLink Devices Inc, Niles, IL 60714 USA.; Johnson, MT (reprint author), US Air Force Acad, Randolph AFB, TX 78150 USA.; Rout, B (reprint author), Univ N Texas, Denton, TX 76203 USA.
EM zihegao2@illinois.edu; thomps12@illinois.edu; ragunat1@illinois.edu;
mtjohns2@illinois.edu; bibhu@unt.edu; choquett@illinois.edu
OI Gao, Zihe/0000-0003-1844-0541
FU Photonics Center at the West Point Military Academy
FX This work was supported in part by the Photonics Center at the West
Point Military Academy.
NR 16
TC 0
Z9 0
U1 5
U2 17
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1041-1135
EI 1941-0174
J9 IEEE PHOTONIC TECH L
JI IEEE Photonics Technol. Lett.
PD FEB 15
PY 2016
VL 28
IS 4
BP 513
EP 515
DI 10.1109/LPT.2015.2500735
PG 3
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA DE8XT
UT WOS:000370920700035
ER
PT J
AU Snure, M
Paduano, Q
Kiefer, A
AF Snure, Michael
Paduano, Qing
Kiefer, Arnold
TI Effect of surface nitridation on the epitaxial growth of few-layer sp(2)
BN
SO JOURNAL OF CRYSTAL GROWTH
LA English
DT Article
DE Metal organic chemical vapor deposition; Nitrides; Dielectric materials;
Surface structure
ID HEXAGONAL BORON-NITRIDE; SAPPHIRE SUBSTRATE; NI(111); FILMS; GAN;
TRANSFORMATION; MONOLAYER; PRESSURE; AL2O3
AB Boron Nitride is a promising 2D dielectric material for use in numerous electronic applications. In order to realize this potential, a process for producing atomically thin layers on microelectronics-compatible substrates is desirable. In this paper we describe an approach to epitaxially grow few-layer sp(2) BN directly on an insulating substrate, using metal-organic chemical vapor deposition (MOCVD). We also elucidate the effect of sapphire surface nitridation on the growth characteristics. We compare the effect of nitridation on the growth rate, surface morphology and structure across a wide range of V/III ratios. Depending on the V/III ratio, two different growth modes were identified: at low V/III 3D island growth is dominant and at high V/III the growth transitions to a self-terminating mode. Under self-terminating growth a film thickness of 1.5 nm is typically achieved. Surface nitridation was found to improve nucleation, promoting self-terminating growth, and resulting in atomically smooth films. Reflection high energy electron diffraction (RHEED) patterns reveal the epitaxial relationship between BN and sapphire to be [1-100]parallel to[11-201 and [0001]parallel to[0001]. Growth at low V/III ratios without surface nitridation produced films with large hexagonal holes, which could not be completely filled by extending the growth time. Through surface nitridation, these holes were eliminated, producing continuous smooth films. Published by Elsevier B.V.
C1 [Snure, Michael; Paduano, Qing; Kiefer, Arnold] Air Force Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
RP Snure, M (reprint author), Air Force Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
EM michael.snure.1@us.af.mil
FU Air Force Office of Scientific Research [13RY03COR]
FX This work is funded by Air Force Office of Scientific Research under
task number 13RY03COR, Program Manager Dr. Kenneth Goretta. This support
is gratefully acknowledged.
NR 27
TC 2
Z9 2
U1 8
U2 35
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-0248
EI 1873-5002
J9 J CRYST GROWTH
JI J. Cryst. Growth
PD FEB 15
PY 2016
VL 436
BP 16
EP 22
DI 10.1016/j.jcrysgro.2015.11.030
PG 7
WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied
SC Crystallography; Materials Science; Physics
GA DB1CC
UT WOS:000368244600003
ER
PT J
AU Haugan, HJ
Mahalingam, K
Szmulowicz, F
Brown, GJ
AF Haugan, H. J.
Mahalingam, K.
Szmulowicz, F.
Brown, G. J.
TI Quantitative study of the effect of deposition temperature on antimony
incorporation in InAs/InAsSb superlattices
SO JOURNAL OF CRYSTAL GROWTH
LA English
DT Article
DE Diffusion; Superlattices; Molecular beam epitaxy; Infrared devices
ID II SUPERLATTICES; DETECTORS
AB InAs/InAsSb superlattices (SLs) are being actively explored for infrared detector applications owing to their superior carrier lifetimes. However, antimony (Sb) segregation during growth can alter the properties of the grown material. In this study, using X-ray energy dispersive spectrometry, authors quantify the compositional profile of individual layers and establish epitaxial parameters for high-quality InAs/ InAsSb SL materials. Epitaxial conditions are determined for a nominal 7.7 nm InAs/3.5 nm InAs0.7Sb0.3 SL structure tailored for an approximately 6 pm response at 150 K. Since the growth of mixed anion alloys is complicated by the potential reaction of As-2 with Sb surfaces, authors varied the deposition temperature (T-g) in order to control As-2 surface reactions on Sb surfaces. Authors find that Sb incorporation is suppressed by 21%, with the increase of T-g from 395 to 440 degrees C. This incorporation likely stems from Sb surface segregation during InAsSb layer growth that is driven by the As-Sb exchange mechanism, which can lead to significant compositional and dimensional deviations from the intended design. (C) 2015 Elsevier B.V. All rights reserved.
C1 [Haugan, H. J.; Mahalingam, K.; Szmulowicz, F.; Brown, G. J.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Haugan, HJ (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM heather.haugan.ctr@us.af.mil
FU Air Force [FA8650-11-D-5800]
FX The work of H.J. Haugan was performed under Air Force contract number
FA8650-11-D-5800. The authors thank S.L. Bowers, and J.A. Peoples for a
technical assistance with the MBE system and X-ray measurements, and
sample preparation for the XEDS measurements, respectively. One of
authors (Hi. Haugan) would also like to thank Professor C.H. Grein for
helpful discussions about gallium-free superlattice design used in this
study.
NR 19
TC 1
Z9 1
U1 2
U2 17
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-0248
EI 1873-5002
J9 J CRYST GROWTH
JI J. Cryst. Growth
PD FEB 15
PY 2016
VL 436
BP 134
EP 137
DI 10.1016/j.jcrysgro.2015.10.018
PG 4
WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied
SC Crystallography; Materials Science; Physics
GA DB1CC
UT WOS:000368244600020
ER
PT J
AU Senkov, ON
Miracle, DB
AF Senkov, O. N.
Miracle, D. B.
TI A new thermodynamic parameter to predict formation of solid solution or
intermetallic phases in high entropy alloys
SO JOURNAL OF ALLOYS AND COMPOUNDS
LA English
DT Article
DE High entropy alloy; Phase selection; Equilibrium phases
ID MULTICOMPONENT ALLOYS; AMORPHOUS PHASE; MICROSTRUCTURE; STABILITY;
ELEMENTS; ALUMINUM; SYSTEM
AB A simple thermodynamic criterion is proposed to predict the presence or absence of equilibrium intermetallic phases in a high entropy alloy at a given temperature T. The criterion was verified using 45 currently available HEAs, for which equilibrium phases and respective annealing temperature are reported. The present model shows good correlation with experiment and gives an improved ability to predict formation of solid solution and intermetallic phases compared to earlier models. (C) 2015 Elsevier B.V. All rights reserved.
C1 [Senkov, O. N.; Miracle, D. B.] Air Force Res Lab, Mat & Mfg Directiorate, Wright Patterson AFB, OH 45433 USA.
RP Senkov, ON (reprint author), Air Force Res Lab, Mat & Mfg Directiorate, Wright Patterson AFB, OH 45433 USA.
EM oleg.senkov.ctr@us.af.mil
OI Senkov, Oleg/0000-0001-5587-415X
FU U.S. Air Force [FA8650-10-D-5226]
FX Discussions with Drs. J.D. Miller and C. Woodward are much appreciated.
Work by O.N. Senkov was supported through the U.S. Air Force on-site
contract No. FA8650-10-D-5226 operated by UES, Inc., Dayton, Ohio.
NR 31
TC 15
Z9 15
U1 26
U2 93
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0925-8388
EI 1873-4669
J9 J ALLOY COMPD
JI J. Alloy. Compd.
PD FEB 15
PY 2016
VL 658
BP 603
EP 607
DI 10.1016/j.jallcom.2015.10.279
PG 5
WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy &
Metallurgical Engineering
SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering
GA CZ2MU
UT WOS:000366940100082
ER
PT J
AU Collins, MG
Juvina, I
Gluck, KA
AF Collins, Michael G.
Juvina, Ion
Gluck, Kevin A.
TI Cognitive Model of Trust Dynamics Predicts Human Behavior within and
between Two Games of Strategic Interaction with Computerized Confederate
Agents
SO FRONTIERS IN PSYCHOLOGY
LA English
DT Article
DE cognitive modeling; a priori model prediction; strategic interaction;
trust dynamics; transfer of learning; trust; social dilemma
ID COORDINATION GAMES; PRISONERS-DILEMMA; COOPERATION; PERFORMANCE;
PRECEDENT
AB When playing games of strategic interaction, such as iterated Prisoner's Dilemma and iterated Chicken Game, people exhibit specific within-game learning (e.g., learning a game's optimal outcome) as well as transfer of learning between games (e.g., a game's optimal outcome occurring at a higher proportion when played after another game). The reciprocal trust players develop during the first game is thought to mediate transfer of learning effects. Recently, a computational cognitive model using a novel trust mechanism has been shown to account for human behavior in both games, including the transfer between games. We present the results of a study in which we evaluate the model's a priori predictions of human learning and transfer in 16 different conditions. The model's predictive validity is compared against five model variants that lacked a trust mechanism. The results suggest that a trust mechanism is necessary to explain human behavior across multiple conditions, even when a human plays against a non-human agent. The addition of a trust mechanism to the other learning mechanisms within the cognitive architecture, such as sequence learning, instance-based learning, and utility learning, leads to better prediction of the empirical data. It is argued that computational cognitive modeling is a useful tool for studying trust development, calibration, and repair.
C1 [Collins, Michael G.; Gluck, Kevin A.] US Air Force, Res Lab, Dayton, OH USA.
[Collins, Michael G.; Juvina, Ion] Wright State Univ, Dept Psychol, Adapt Strateg Thinking & Execut Control Cognit &, Dayton, OH 45435 USA.
RP Collins, MG (reprint author), US Air Force, Res Lab, Dayton, OH USA.; Collins, MG (reprint author), Wright State Univ, Dept Psychol, Adapt Strateg Thinking & Execut Control Cognit &, Dayton, OH 45435 USA.
EM collins.283@wright.edu
FU Air Force Office of Scientific Research [FA9550-14-1-0206]; Oak Ridge
Institute for Science and Education (ORISE)
FX The work presented here was supported by The Air Force Office of
Scientific Research grant number FA9550-14-1-0206 to IJ. The authors
would also like to thank the Oak Ridge Institute for Science and
Education (ORISE) who supported this research by appointing Michael
Collins, to the Student Research Participant Program at the U.S. Air
Force Research Laboratory (USAFRL), 711th Human Performance Wing, Human
Effectiveness Directorate, Warfighter Readiness Research Division,
Cognitive Models and Agents Branch administered by the ORISE through an
interagency agreement between the U.S. Department of Energy and USAFRL.
NR 27
TC 0
Z9 0
U1 6
U2 18
PU FRONTIERS MEDIA SA
PI LAUSANNE
PA PO BOX 110, EPFL INNOVATION PARK, BUILDING I, LAUSANNE, 1015,
SWITZERLAND
SN 1664-1078
J9 FRONT PSYCHOL
JI Front. Psychol.
PD FEB 12
PY 2016
VL 7
AR 49
DI 10.3389/fpsyg.2016.00049
PG 17
WC Psychology, Multidisciplinary
SC Psychology
GA DD6DR
UT WOS:000370015000001
PM 26903892
ER
PT J
AU Shcherbin, K
Gvozdovskyy, I
Evans, DR
AF Shcherbin, Konstantin
Gvozdovskyy, Igor
Evans, Dean R.
TI Infrared sensitive liquid crystal light valve with semiconductor
substrate
SO APPLIED OPTICS
LA English
DT Article
ID 1.55 MU-M; PHOTOREFRACTIVE PROPERTIES; GAAS
AB A liquid crystal light valve (LCLV) is an optically controlled spatial light modulator that allows recording of dynamic holograms. Almost all known LCLVs operate in the visible range of the spectrum. In the present work we demonstrate a LCLV operating in the infrared. The interaction of signal and pump waves is studied for different applied voltages, grating spacings, and intensities of the recording beams. A fourfold amplification of the weak signal beam is achieved. The amplitude of the refractive index modulation Delta n = 0.007 and nonlinear coupling constant n(2) = -1 cm(2)/W are estimated from the experimental results. External phase modulation of one of the recording beams is used for a further transient increase of the signal beam gain. (C) 2016 Optical Society of America
C1 [Shcherbin, Konstantin; Gvozdovskyy, Igor] Natl Acad Sci, Inst Phys, Prospekt Nauki 46, UA-03680 Kiev, Ukraine.
[Evans, Dean R.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Shcherbin, K (reprint author), Natl Acad Sci, Inst Phys, Prospekt Nauki 46, UA-03680 Kiev, Ukraine.
EM kshcherb@iop.kiev.ua
FU European Office of Aerospace Research and Development [118006]; Science
and Technology Center in Ukraine [P585]
FX European Office of Aerospace Research and Development (118006); Science
and Technology Center in Ukraine (P585)
NR 16
TC 4
Z9 4
U1 3
U2 11
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1559-128X
EI 2155-3165
J9 APPL OPTICS
JI Appl. Optics
PD FEB 10
PY 2016
VL 55
IS 5
BP 1076
EP 1081
DI 10.1364/AO.55.001076
PG 6
WC Optics
SC Optics
GA DD1NU
UT WOS:000369689200022
PM 26906379
ER
PT J
AU Liu, R
Lu, R
Roberts, C
Gong, S
Allen, JW
Allen, MS
Wenner, BR
Wasserman, D
AF Liu, R.
Lu, R.
Roberts, C.
Gong, S.
Allen, J. W.
Allen, M. S.
Wenner, B. R.
Wasserman, D.
TI Multiplexed infrared photodetection using resonant radio-frequency
circuits
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID KINETIC INDUCTANCE DETECTORS; SPLIT-RING RESONATORS; TERAHERTZ
TECHNOLOGY; METAMATERIAL DEVICES; ASTROPHYSICS; FILTERS; ARRAY
AB We demonstrate a room-temperature semiconductor-based photodetector where readout is achieved using a resonant radio-frequency (RF) circuit consisting of a microstrip split-ring resonator coupled to a microstrip busline, fabricated on a semiconductor substrate. The RF resonant circuits are characterized at RF frequencies as function of resonator geometry, as well as for their response to incident IR radiation. The detectors are modeled analytically and using commercial simulation software, with good agreement to our experimental results. Though the detector sensitivity is weak, the detector architecture offers the potential for multiplexing arrays of detectors on a single readout line, in addition to high speed response for either direct coupling of optical signals to RF circuitry, or alternatively, carrier dynamics characterization of semiconductor, or other, material systems. (C) 2016 AIP Publishing LLC.
C1 [Liu, R.; Lu, R.; Gong, S.; Wasserman, D.] Univ Illinois, Dept Elect & Comp Engn, Urbana, IL 61801 USA.
[Roberts, C.] Univ Massachusetts, Dept Phys & Appl Phys, Lowell, MA 01854 USA.
[Allen, J. W.; Allen, M. S.] US Air Force, Res Lab, Munit Directorate, Eglin AFB, FL 32542 USA.
[Wenner, B. R.] US Air Force, Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
RP Liu, R (reprint author), Univ Illinois, Dept Elect & Comp Engn, Urbana, IL 61801 USA.
FU National Science Foundation [DMR 1210398, DMR 1209761]; AFOSR Lab Task
[14RY07COR]; AFRL/RW Corporate Venture Fund award
FX The authors would like to acknowledge funding from the National Science
Foundation, Award Nos. DMR #1210398 (D.W. and R.L.) and DMR #1209761
(C.R.). The authors (J.W.A., M.S.A., and B.R.W.) would like to thank the
2015 AFRL/RW Corporate Venture Fund award (Dr. D. Lambert) and AFOSR Lab
Task 14RY07COR (Dr. G. Pomrenke). D.W. was grateful to Professor J.
Vieira, Professor J. Filippini, and Professor J. Eckstein (UIUC) for
stimulating and illuminating discussion.
NR 32
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U1 4
U2 13
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD FEB 8
PY 2016
VL 108
IS 6
AR 061101
DI 10.1063/1.4941431
PG 5
WC Physics, Applied
SC Physics
GA DH8PJ
UT WOS:000373056300001
ER
PT J
AU Patnaik, AK
Roy, S
Gord, JR
AF Patnaik, Anil K.
Roy, Sukesh
Gord, James R.
TI Ultrafast saturation of electronic-resonance-enhanced coherent
anti-Stokes Raman scattering and comparison for pulse durations in the
nanosecond to femtosecond regime
SO PHYSICAL REVIEW A
LA English
DT Article
ID NITRIC-OXIDE; POLARIZATION SPECTROSCOPY; PRESSURE FLAMES; 2-LEVEL ATOM;
LASER-PULSE; DEPENDENCE; TRANSITIONS; IONIZATION; FREQUENCY; SPECTRA
AB The saturation threshold of a probe pulse in an ultrafast electronic-resonance-enhanced (ERE) coherent anti-Stokes Raman spectroscopy (CARS) configuration is calculated. We demonstrate that while the underdamping condition is a sufficient condition for saturation of ERE-CARS with the long-pulse excitations, a transient gain must be achieved to saturate the ERE-CARS signal for the ultrafast probe regime. We identify that the area under the probe pulse can be used as a definitive parameter to determine the criterion for a saturation threshold for ultrafast ERE-CARS. From a simplified analytical solution and a detailed numerical calculation based on density-matrix equations, the saturation threshold of ERE-CARS is compared for a wide range of probe-pulse durations from the 10-ns to the 10-fs regime. The theory explains both qualitatively and quantitatively the saturation thresholds of resonant transitions and also gives a predictive capability for other pulse duration regimes. The presented criterion for the saturation threshold will be useful in establishing the design parameters for ultrafast ERE-CARS.
C1 [Patnaik, Anil K.; Gord, James R.] Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
[Patnaik, Anil K.] Wright State Univ, Dept Phys, Dayton, OH 45435 USA.
[Roy, Sukesh] Spectral Energies LLC, 5100 Springfield St, Dayton, OH 45431 USA.
RP Patnaik, AK; Gord, JR (reprint author), Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.; Patnaik, AK (reprint author), Wright State Univ, Dept Phys, Dayton, OH 45435 USA.; Roy, S (reprint author), Spectral Energies LLC, 5100 Springfield St, Dayton, OH 45431 USA.
EM anil.patnaik@wright.edu; roy.sukesh@gmail.com; james.gord@us.af.mil
FU U.S. Air Force Research Laboratory [F33615-03-D-2329, FA8650-15-D-2518];
U.S. Air Force Office of Scientific Research
FX Funding for this study was provided by the U.S. Air Force Research
Laboratory (Contracts No. F33615-03-D-2329 and No. FA8650-15-D-2518) and
the U.S. Air Force Office of Scientific Research (Dr. Enrique Parra).
This manuscript has been cleared for public release (No.
88ABW-2015-3756).
NR 45
TC 0
Z9 0
U1 5
U2 20
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9926
EI 2469-9934
J9 PHYS REV A
JI Phys. Rev. A
PD FEB 5
PY 2016
VL 93
IS 2
AR 023812
DI 10.1103/PhysRevA.93.023812
PG 9
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA DC6ZI
UT WOS:000369367700007
ER
PT J
AU Karayan, AI
Jata, K
Velez, M
Castaneda, H
AF Karayan, Ahmad Ivan
Jata, Kumar
Velez, Michael
Castaneda, Homero
TI On exfoliation corrosion of alloy 2060 T8E30 in an aggressive acid
environment
SO JOURNAL OF ALLOYS AND COMPOUNDS
LA English
DT Article
DE Alloy 2060; Exfoliation corrosion; Intergranular corrosion; EXCO
solution
ID ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY; STRENGTH ALUMINUM-ALLOYS; CU-MG
ALLOYS; LOCALIZED CORROSION; INTERGRANULAR CORROSION; AGING TEMPERATURE;
STRESS-CORROSION; GRAIN-STRUCTURE; HEAT-TREATMENT; BEHAVIOR
AB In this study, we investigated exfoliation corrosion (EFC) of the alloy 2060 T3E80 in an aggressive solution, namely EXCO. The pH value increased from 0.25 at the initial time point to 3.45 after 96 h of testing. In Stage 1 (0.25 < pH < 3.00), the pH value increased significantly and the aluminum surface experienced anodic dissolution. During this step, a massive hydrogen evolution reaction was observed, and pits formed due to the galvanic effect between the anodic and cathodic sites. The electrochemical impedance spectroscopy (EIS) test and equivalent analogs suggest that the inductive loop at low Nyquist frequencies and phase angle plots correspond to the adsorbed intermediates in the reduction reaction. In Stage 2 (3.00 < pH < 3.45), the pH value slowly increased. The continuous pits along the grain boundaries produced intergranular corrosion (IGC) during this stage. A small amount of delamination occurred at this stage. In Stage 3, pH remains constant and IGC extensively propagate, allowing the accumulation of white gelatinous corrosion products under the grains. These, along with hydrogen bubbles underneath the grain, exerted pressure to the grain that was attacked by IGC, resulting in a lifting of the grain. The grain lifting at this stage was abundant. It is clear from the cyclic potentiodynamic polarization and scanning electron microscopy images that the pits formed on this alloy surface in the EXCO solution can be attributed to fall-out of particles instead of passive film breakdown. (C) 2015 Elsevier B.V. All rights reserved.
C1 [Karayan, Ahmad Ivan] Univ Akron, Dept Chem & Biomol Engn, Akron, OH 44304 USA.
[Jata, Kumar; Velez, Michael] US Air Force Res Lab, Dayton, OH 45433 USA.
[Castaneda, Homero] Texas A&M Univ, Dept Mat Sci & Engn, College Stn, TX 77843 USA.
RP Castaneda, H (reprint author), Texas A&M Univ, Dept Mat Sci & Engn, College Stn, TX 77843 USA.
EM hcastaneda@tamu.edu
FU [USAFA-FA7000-13-2-0023]
FX The authors acknowledge the financial support of the
USAFA-FA7000-13-2-0023 cooperative agreement contract.
NR 60
TC 2
Z9 2
U1 8
U2 20
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0925-8388
EI 1873-4669
J9 J ALLOY COMPD
JI J. Alloy. Compd.
PD FEB 5
PY 2016
VL 657
BP 546
EP 558
DI 10.1016/j.jallcom.2015.10.082
PG 13
WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy &
Metallurgical Engineering
SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering
GA CZ2KT
UT WOS:000366934800076
ER
PT J
AU Day, PN
Pachter, R
Nguyen, KA
Bigioni, TP
AF Day, Paul N.
Pachter, Ruth
Nguyen, Kiet A.
Bigioni, Terry P.
TI Linear and Nonlinear Optical Response in Silver Nanoclusters: Insight
from a Computational Investigation
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID DENSITY-FUNCTIONAL THEORY; GENERALIZED GRADIENT APPROXIMATION; CORRECT
ASYMPTOTIC-BEHAVIOR; 2-PHOTON ABSORPTION-SPECTRA; MOLECULAR
CALCULATIONS; EXCITATION-ENERGIES; GOLD CLUSTERS; ONE-PHOTON;
NANOPARTICLES; EXCHANGE
AB We report a detisity functional theory (DFT) and time-dependent DFT (TDDFT) investigation of the thiolated silver nanoclusters [Ag-44(SR)(30)](4-), Ag-14(SR)(12)(PR'(3))(8), Ag-31(SG)(19), Ag-32-(SG)(19), and Ag-15(SG)(11), which were synthesized' and for which one-photon absorption (OPA) characterization is available. Our computational investigation based on careful examination of the exchange-correlation functional used in DFT geometry optimization and for the linear optical properties predictions by TDDFT, demonstrated good agreement with the measured linear absorption spectra, however dependent on the applied functional. Following the benchrnarking, we evaluated the two-photon absorption (TPA) response Using TDDFT, noting that accurate prediction of OPA is important for suppositions on the spectral range for TPA enhancement because of the sensitivity to the excitation energies. Although the TPA cross-section results are complicated by resonance effects and quantifying TPA cross sections for these systems is difficult, our results indicate that the nanoclusters Ag-15 and Ag-31/32 are likely to have large TPA cross sections. The spherical symmetry of the Ag-44 and Ag-14 nanoclusters leads to applicability of superatom theory, while it is not as useful for the more oblate geometries of the Ag-15 and Ag-31/32 systems.
C1 [Day, Paul N.; Pachter, Ruth; Nguyen, Kiet A.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Day, Paul N.] Gen Dynam Informat Technol Inc, Dayton, OH 45431 USA.
[Nguyen, Kiet A.] UES Inc, Dayton, OH 45432 USA.
[Bigioni, Terry P.] Univ Toledo, Dept Chem, Toledo, OH 43606 USA.
[Bigioni, Terry P.] Univ Toledo, Sch Solar & Adv Renewable Energy, Toledo, OH 43606 USA.
RP Day, PN; Pachter, R (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.; Day, PN (reprint author), Gen Dynam Informat Technol Inc, Dayton, OH 45431 USA.
EM paul.day.4.ctr@us.af.mil; ruth.pachter@us.af.mil
FU Air Force Office of Scientific Research
FX We gratefully acknowledge support by the Air Force Office of Scientific
Research and computer time and helpful support from the Air Force
Research Laboratory DOD Supercomputing Resource Center.
NR 54
TC 5
Z9 5
U1 10
U2 30
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1089-5639
J9 J PHYS CHEM A
JI J. Phys. Chem. A
PD FEB 4
PY 2016
VL 120
IS 4
BP 507
EP 518
DI 10.1021/acs.jpca.5b09623
PG 12
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA DD2ST
UT WOS:000369773200005
PM 26730764
ER
PT J
AU Pock, AR
Niemtzow, RC
Burns, SM
Piazza, TR
Hofmann, LA
Baxter, JS
AF Pock, Arnyce R.
Niemtzow, Richard C.
Burns, Stephen M.
Piazza, Thomas R.
Hofmann, Lewis A.
Baxter, John S.
TI Acupuncture for the New Millennium: A Photoessay from Beijing, China
SO MEDICAL ACUPUNCTURE
LA English
DT Editorial Material
C1 [Pock, Arnyce R.] Uniformed Serv Univ Hlth Sci, 4301 Jones Bridge Rd, Bethesda, MD 20814 USA.
[Niemtzow, Richard C.; Burns, Stephen M.; Piazza, Thomas R.; Hofmann, Lewis A.; Baxter, John S.] US Air Force, Acupuncture & Integrat Med Ctr, Joint Base Andrews, MD USA.
RP Pock, AR (reprint author), Uniformed Serv Univ Hlth Sci, 4301 Jones Bridge Rd, Bethesda, MD 20814 USA.
EM Arnyce.Pock@usuhs.edu
NR 7
TC 1
Z9 1
U1 0
U2 0
PU MARY ANN LIEBERT, INC
PI NEW ROCHELLE
PA 140 HUGUENOT STREET, 3RD FL, NEW ROCHELLE, NY 10801 USA
SN 1933-6586
EI 1933-6594
J9 MED ACUPUNCT
JI Med. Acupunct.
PD FEB
PY 2016
VL 28
IS 1
BP 9
EP 15
DI 10.1089/acu.2016.29014.arp
PG 7
WC Integrative & Complementary Medicine
SC Integrative & Complementary Medicine
GA EB7JP
UT WOS:000387563400005
ER
PT J
AU Choi, CK
Kihm, KD
Pratt, DM
AF Choi, Chang K.
Kihm, Kenneth D.
Pratt, David M.
TI Heat Transfer Gallery
SO JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME
LA English
DT Editorial Material
C1 [Choi, Chang K.] Michigan Technol Univ, Mech Engn Engn Mech, Houghton, MI 49931 USA.
[Kihm, Kenneth D.] Univ Tennessee, Dept Mech Aerosp & Biomed Engn, Knoxville, TN 37996 USA.
[Pratt, David M.] WPAFB, Dayton, OH 45433 USA.
[Pratt, David M.] Wright Patterson Air Force Base, Dayton, OH 45433 USA.
RP Choi, CK (reprint author), Michigan Technol Univ, Mech Engn Engn Mech, Houghton, MI 49931 USA.
EM cchoi@mtu.edu; kkihm@utk.edu; david.pratt@wpafb.af.mil
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ASME
PI NEW YORK
PA TWO PARK AVE, NEW YORK, NY 10016-5990 USA
SN 0022-1481
EI 1528-8943
J9 J HEAT TRANS-T ASME
JI J. Heat Transf.-Trans. ASME
PD FEB
PY 2016
VL 138
IS 2
AR 020301
PG 1
WC Thermodynamics; Engineering, Mechanical
SC Thermodynamics; Engineering
GA DO8WN
UT WOS:000378066200001
ER
PT J
AU Goel, S
Wyrwicz, L
Choi, M
Coveler, AL
Ucar, A
Brown, AW
Sarosiek, T
Wong, L
Stecher, M
Fisher, GA
Hendifar, AE
AF Goel, Sanjay
Wyrwicz, Lucjan
Choi, Minsig
Coveler, Andrew L.
Ucar, Antonio
Brown, Alexander Ward
Sarosiek, Tomasz
Wong, Lucas
Stecher, Michael
Fisher, George A.
Hendifar, Andrew Eugene
TI Phase III double-blinded, placebo-controlled study of MABp1 for
improving survival in metastatic colorectal cancer.
SO JOURNAL OF CLINICAL ONCOLOGY
LA English
DT Meeting Abstract
CT Gastrointestinal Cancers Symposium
CY JAN 21-23, 2016
CL San Francisco, CA
C1 Montefiore Einstein Canc Ctr, Bronx, NY USA.
Maria Sklodowska Curie Inst Oncol, Warsaw, Poland.
SUNY Stony Brook, Stony Brook, NY 11794 USA.
Univ Washington, Seattle, WA 98195 USA.
Adv Med Specialists, Miami, FL USA.
Wilford Hall USAF Med Ctr, Lackland AFB, TX USA.
Ctr Med Ostrobramska NZOZ Magodent, Warsaw, Poland.
Scott & White Mem Hosp & Clin, Temple, TX 76508 USA.
XBiotech USA Inc, Austin, TX USA.
Stanford Univ, Sch Med, Stanford, CA 94305 USA.
Cedars Sinai Med Ctr, Samuel Oschin Comprehens Canc Inst, Los Angeles, CA 90048 USA.
NR 0
TC 0
Z9 0
U1 3
U2 4
PU AMER SOC CLINICAL ONCOLOGY
PI ALEXANDRIA
PA 2318 MILL ROAD, STE 800, ALEXANDRIA, VA 22314 USA
SN 0732-183X
EI 1527-7755
J9 J CLIN ONCOL
JI J. Clin. Oncol.
PD FEB 1
PY 2016
VL 34
IS 4
SU S
MA TPS784
PG 1
WC Oncology
SC Oncology
GA DO9MB
UT WOS:000378109600759
ER
PT J
AU Adams, SF
Demidov, VI
Bogdanov, EA
Koepke, ME
Kudryavtsev, AA
Kurlyandskaya, IP
AF Adams, S. F.
Demidov, V. I.
Bogdanov, E. A.
Koepke, M. E.
Kudryavtsev, A. A.
Kurlyandskaya, I. P.
TI Control of plasma properties in a short direct-current glow discharge
with active boundaries
SO PHYSICS OF PLASMAS
LA English
DT Article
AB To demonstrate controlling electron/metastable density ratio and electron temperature by applying negative voltages to the active (conducting) discharge wall in a low-pressure plasma with nonlocal electron energy distribution function, modeling has been performed in a short (lacking the positive-column region) direct-current glow discharge with a cold cathode. The applied negative voltage can modify the trapping of the low-energy part of the energetic electrons that are emitted from the cathode sheath and that arise from the atomic and molecular processes in the plasma within the device volume. These electrons are responsible for heating the slow, thermal electrons, while production of slow electrons (ions) and metastable atoms is mostly due to the energetic electrons with higher energies. Increasing electron temperature results in increasing decay rate of slow, thermal electrons (ions), while decay rate of metastable atoms and production rates of slow electrons (ions) and metastable atoms practically are unchanged. The result is in the variation of electron/metastable density ratio and electron temperature with the variation of the wall negative voltage. (C) 2016 AIP Publishing LLC.
C1 [Adams, S. F.; Demidov, V. I.] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Demidov, V. I.; Koepke, M. E.] W Virginia Univ, Morgantown, WV 26506 USA.
[Bogdanov, E. A.; Kudryavtsev, A. A.] St Petersburg State Univ, St Petersburg 199034, Russia.
[Kurlyandskaya, I. P.] St Petersburg State Univ, State Fire Serv EMERCOM RF, Murmansk Branch, Murmansk 183040, Russia.
RP Demidov, VI (reprint author), US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.; Demidov, VI (reprint author), W Virginia Univ, Morgantown, WV 26506 USA.
EM vladimir.demidov@mail.wvu.edu
RI Demidov, Vladimir/A-4247-2013; Kurlyandskaya, Iya/S-3911-2016
OI Demidov, Vladimir/0000-0002-2672-7684; Kurlyandskaya,
Iya/0000-0002-4592-1730
FU National Research Council Research Associateship Award at AFRL
FX The authors are grateful to Dr. I. D. Kaganovich for the valuable
discussions. A part of this research was performed while one of the
authors (V.I.D.) held a National Research Council Research Associateship
Award at AFRL.
NR 15
TC 2
Z9 2
U1 4
U2 5
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 1070-664X
EI 1089-7674
J9 PHYS PLASMAS
JI Phys. Plasmas
PD FEB
PY 2016
VL 23
IS 2
AR 024501
DI 10.1063/1.4941259
PG 4
WC Physics, Fluids & Plasmas
SC Physics
GA DL7XR
UT WOS:000375854200076
ER
PT J
AU Gorham, LA
Rigling, BD
AF Gorham, Leroy A.
Rigling, Brian D.
TI Scene Size Limits for Polar Format Algorithm
SO IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
LA English
DT Article
ID SYNTHETIC-APERTURE RADAR; SAR; RANGE
AB Synthetic aperture radar (SAR) is a form of remote sensing where coherent radar echoes transmitted from a moving platform are processed to form an image of a scene, usually on the ground. There are several algorithms that have been developed with varying levels of complexity and accuracy. In applications with large scene size requirements, the choice of image formation algorithm is important. Exact imaging algorithms like the back-projection algorithm (BPA) can form large images without errors, but they are computationally expensive. Another well-known algorithm is the polar format algorithm (PFA), which is significantly faster than BPA, but it uses approximations that cause image errors in large scenes. In this paper, we evaluate the scene size limitations of the PFA in terms of image defocus. This is caused by residual quadratic phase errors that arise due to approximations in the algorithm. We derive this residual quadratic phase error using a Taylor series expansion in the slow time dimension. Then, we derive simplified expressions for image defocus for two flight paths: circular and linear. We also use the Taylor series expansion to derive accurate corrections for image distortion caused by PFA. These distortion corrections are used in conjunction with the residual quadratic phase errors to derive accurate scene size limitations that are notably different from the circular regions of focus determined in earlier works.
C1 [Gorham, Leroy A.] Air Force Res Lab, Wright Patterson AFB, OH USA.
[Rigling, Brian D.] Wright State Univ, Elect Engn, 311 Russ Engn Ctr,3640 Colonel Glenn Highway, Dayton, OH 45435 USA.
[Gorham, Leroy A.] AFLCMC, 2241 Avionics Circle, Wright Patterson AFB, OH 45433 USA.
RP Rigling, BD (reprint author), Wright State Univ, Elect Engn, 311 Russ Engn Ctr,3640 Colonel Glenn Highway, Dayton, OH 45435 USA.
EM brian.rigling@wright.edu
NR 20
TC 2
Z9 2
U1 0
U2 1
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9251
EI 1557-9603
J9 IEEE T AERO ELEC SYS
JI IEEE Trans. Aerosp. Electron. Syst.
PD FEB
PY 2016
VL 52
IS 1
BP 73
EP 84
DI 10.1109/TAES.2015.140853
PG 12
WC Engineering, Aerospace; Engineering, Electrical & Electronic;
Telecommunications
SC Engineering; Telecommunications
GA DJ4FF
UT WOS:000374160100007
ER
PT J
AU Myers, J
Mou, S
Chen, KH
Zhuang, Y
AF Myers, J.
Mou, S.
Chen, K. -H.
Zhuang, Y.
TI Scanning microwave microscope imaging of micro-patterned monolayer
graphene grown by chemical vapor deposition
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID FILMS; TRANSISTORS; VO2
AB Characterization of micro-patterned chemical vapor deposited monolayer graphene using a scanning microwave microscope has been presented. Monolayer graphene sheets deposited on a copper substrate were transferred to a variety of substrates and micro-patterned into a periodic array of parallel lines. The measured complex reflection coefficients exhibit a strong dependency on the operating frequency and on the samples' electrical conductivity and permittivity. The experiments show an extremely high sensitivity by detecting image contrast between single and double layer graphene sheets. Correlating the images recorded at the half-and quarter-wavelength resonant frequencies shows that the relative permittivity of the single layer graphene sheet is above 10(5). The results are in good agreement with the three dimensional numerical electromagnetic simulations. This method may be instrumental for a comprehensive understanding of the scanning microwave microscope image contrast and provide a unique technique to estimate the local electrical properties with nano-meter scale spatial resolution of two dimensional materials at radio frequency. (C) 2016 AIP Publishing LLC.
C1 [Myers, J.; Zhuang, Y.] Wright State Univ, Dept Elect Engn, Dayton, OH 45435 USA.
[Mou, S.] Air Force Res Lab, Mat Directorate, Wright Patterson AFB, OH 45433 USA.
[Chen, K. -H.] Acad Sinica, Inst Atom & Mol Sci, Taipei, Taiwan.
RP Myers, J (reprint author), Wright State Univ, Dept Elect Engn, Dayton, OH 45435 USA.
FU Air Force Office of Scientific Research [14RX12COR]
FX Shin Mou and Joshua Myers acknowledge the financial support from Air
Force Office of Scientific Research under AFRL laboratory task 14RX12COR
managed by Dr. Gernot Pomrenke.
NR 40
TC 0
Z9 0
U1 10
U2 23
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD FEB 1
PY 2016
VL 108
IS 5
AR 053101
DI 10.1063/1.4940991
PG 5
WC Physics, Applied
SC Physics
GA DH8PD
UT WOS:000373055700048
ER
PT J
AU Ramamirtham, R
Akula, JD
Soni, G
Swanson, MJ
Bush, JN
Moskowitz, A
Swanson, EA
Favazza, TL
Tavormina, JL
Mujat, M
Ferguson, RD
Hansen, RM
Fulton, AB
AF Ramamirtham, Ramkumar
Akula, James D.
Soni, Garima
Swanson, Matthew J.
Bush, Jennifer N.
Moskowitz, Anne
Swanson, Emily A.
Favazza, Tara L.
Tavormina, Jena L.
Mujat, Mircea
Ferguson, R. Daniel
Hansen, Ronald M.
Fulton, Anne B.
TI Extrafoveal Cone Packing in Eyes With a History of Retinopathy of
Prematurity
SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE
LA English
DT Article
DE retinopathy of prematurity; cones; physiological optics; image analysis;
photoreceptor morphology
ID OPTICAL COHERENCE TOMOGRAPHY; SCANNING LASER OPHTHALMOSCOPE; DIRECTIONAL
SENSITIVITY; THRESHOLD RETINOPATHY; MULTICENTER TRIAL; FINE-STRUCTURE;
VISUAL-FIELDS; CHILDREN; CRYOTHERAPY; INFANTS
AB PURPOSE. To study the density and packing geometry of the extrafoveal cone photoreceptors in eyes with a history of retinopathy of prematurity (ROP). We used a multimodal combination of adaptive optics (AO) scanning light ophthalmoscopy (SLO) and optical coherence tomography (OCT).
METHODS. Cones were identified in subjects (aged 14-26 years) with a history of ROP that was either severe and treated by laser ablation of avascular peripheral retina (TROP; n = 5) or mild and spontaneously resolved, untreated (UROP; n = 5), and in term-born controls (CT; n = 8). The AO-SLO images were obtained at temporal eccentricities 4.5 degrees, 9 degrees, 13.5 degrees, and 18 degrees using both confocal and offset apertures with simultaneous, colocal OCT images. Effects of group, eccentricity, and aperture were evaluated and the modalities compared.
RESULTS. In the SLO images, cone density was lower and the packing pattern less regular in TROP, relative to CT and UROP retinae. Although SLO image quality appeared lower in TROP, root mean square (RMS) wavefront error did not differ among the groups. In TROP eyes, cone discrimination was easier in offset aperture images. There was no evidence of cone loss in the TROP OCT images.
CONCLUSIONS. Low cone density in TROP confocal SLO images may have resulted from lower image quality. Since AO correction in these eyes was equivalent to that of the control group, and OCT imaging showed no significant cone loss, the optical properties of the inner retina or properties of the cones themselves are likely altered in a way that affects photoreceptor imaging.
C1 [Ramamirtham, Ramkumar; Akula, James D.; Soni, Garima; Swanson, Matthew J.; Bush, Jennifer N.; Moskowitz, Anne; Swanson, Emily A.; Favazza, Tara L.; Tavormina, Jena L.; Hansen, Ronald M.; Fulton, Anne B.] Boston Childrens Hosp, Boston, MA USA.
[Ramamirtham, Ramkumar; Akula, James D.; Moskowitz, Anne; Hansen, Ronald M.; Fulton, Anne B.] Harvard Univ, Sch Med, Boston, MA USA.
[Soni, Garima] Northeastern Univ, Boston, MA 02115 USA.
[Swanson, Matthew J.] US Air Force Acad, Colorado Springs, CO 80840 USA.
[Mujat, Mircea; Ferguson, R. Daniel] Phys Sci Inc, Andover, MA USA.
RP Fulton, AB (reprint author), Dept Ophthalmol, 300 Longwood Ave,Fegan 4, Boston, MA 02115 USA.
EM anne.fulton@childrens.harvard.edu
OI Tavormina, Jena/0000-0003-4869-7866
FU Massachusetts Lions Eye Research Fund; Boston Children's Hospital
Ophthalmology Foundation; National Institutes of Health [EY10597]
FX Supported by the Massachusetts Lions Eye Research Fund (RMH), Boston
Children's Hospital Ophthalmology Foundation (JDA), and National
Institutes of Health Grant EY10597 (ABF).
NR 48
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U1 1
U2 3
PU ASSOC RESEARCH VISION OPHTHALMOLOGY INC
PI ROCKVILLE
PA 12300 TWINBROOK PARKWAY, ROCKVILLE, MD 20852-1606 USA
SN 0146-0404
EI 1552-5783
J9 INVEST OPHTH VIS SCI
JI Invest. Ophthalmol. Vis. Sci.
PD FEB
PY 2016
VL 57
IS 2
BP 467
EP 475
DI 10.1167/iovs.15-17783
PG 9
WC Ophthalmology
SC Ophthalmology
GA DI6EF
UT WOS:000373591300020
PM 26868749
ER
PT J
AU Chiles, DP
Roberts, TA
Klein, DA
AF Chiles, Daniel P.
Roberts, Timothy A.
Klein, David A.
TI LONG-ACTING REVERSIBLE CONTRACEPTION UPTAKE AND CONTINUATION IN A
UNIVERSAL HEALTHCARE SYSTEM
SO JOURNAL OF ADOLESCENT HEALTH
LA English
DT Meeting Abstract
C1 [Chiles, Daniel P.] US Army, Washington, DC USA.
[Roberts, Timothy A.; Klein, David A.] US Air Force, Washington, DC USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 1054-139X
EI 1879-1972
J9 J ADOLESCENT HEALTH
JI J. Adolesc. Health
PD FEB
PY 2016
VL 58
IS 2
SU S
MA 152
BP S79
EP S80
PG 3
WC Psychology, Developmental; Public, Environmental & Occupational Health;
Pediatrics
SC Psychology; Public, Environmental & Occupational Health; Pediatrics
GA DI3VW
UT WOS:000373428800153
ER
PT J
AU Tvaryanas, AP
Maupin, GM
Fouts, BL
AF Tvaryanas, Anthony P.
Maupin, Genny M.
Fouts, Brittany L.
TI Assessment of Deployment-Related Exposures on Risk of Incident Mental
Health Diagnoses Among Air Force Critical Care Providers: Nested
Case-Control Study
SO MILITARY MEDICINE
LA English
DT Article
ID MOTOR-VEHICLE ACCIDENTS; POSTTRAUMATIC-STRESS; IRAQ WAR; PERSONNEL;
COMBAT; AFGHANISTAN; PERFORMANCE; COMPONENT; SERVICES; IMPACT
AB Objectives: The purpose of this study was to determine the association between deployment-related occupational/environmental exposures and incident postdeployment mental health (PDMH) conditions in a defined population of military health care professionals working in the deployed critical care environment. Methods: A nested case-control study compared cohort members with a PDMH condition (cases, N = 146) with those without a PDMH condition (controls, N = 800) in terms of deployment-related exposures as ascertained using Postdeployment Health Assessment DD 2796 questionnaire data. Multivariable logistic regression models were used to compute odds ratios. Results: Nonphysician career fields (i.e., nurses and medical technicians), exposure to dead bodies or people killed/wounded, history of a vehicular accident/crash, exposure to sand/dust, exposure to lasers, and use of mission-oriented protective posture (MOPP) overgarments were associated with increased likelihood for a PDMH condition. The infrequent exposures (i.e., vehicular accident/crash, lasers, and MOPP overgarments) were the exposures most strongly associated with subsequent PDHM conditions. Conclusions: For military health care providers returning from the deployed environment, several exposures are useful for predicting those at increased risk for a PDMH condition. However, there are likely many other important risk factors beyond those captured on the DD 2796 questionnaire.
C1 [Tvaryanas, Anthony P.] Human Syst Integrat Directorate, 711th Human Performance Wing,2510 Fifth St, Wright Patterson AFB, OH 45433 USA.
[Maupin, Genny M.; Fouts, Brittany L.] US Air Force, Aeromed Res Dept, Sch Aerosp Med, 2510 Fifth St,Bldg 840, Wright Patterson AFB, OH 45433 USA.
RP Tvaryanas, AP (reprint author), Human Syst Integrat Directorate, 711th Human Performance Wing,2510 Fifth St, Wright Patterson AFB, OH 45433 USA.
FU U.S. Department of Energy; USAFRL
FX This research was supported in part by an appointment to the
Postgraduate Research Participation Program at the U.S. Air Force
Research Laboratory (USAFRL), 711th Human Performance Wing administered
by the Oak Ridge Institute for Science and Education through an
interagency agreement between the U.S. Department of Energy and USAFRL.
NR 24
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U1 2
U2 4
PU ASSOC MILITARY SURG US
PI BETHESDA
PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 USA
SN 0026-4075
EI 1930-613X
J9 MIL MED
JI Milit. Med.
PD FEB
PY 2016
VL 181
IS 2
BP 143
EP 151
DI 10.7205/MILMED-D-14-00585
PG 9
WC Medicine, General & Internal
SC General & Internal Medicine
GA DI3ND
UT WOS:000373404500016
PM 26837083
ER
PT J
AU Kuether, RJ
Allen, MS
Hollkamp, JJ
AF Kuether, Robert J.
Allen, Matthew S.
Hollkamp, Joseph J.
TI Modal Substructuring of Geometrically Nonlinear Finite-Element Models
SO AIAA JOURNAL
LA English
DT Article
ID REDUCED-ORDER MODELS; RESPONSE PREDICTION; DYNAMIC-ANALYSIS; SYSTEMS;
VIBRATION
AB The efficiency of a modal substructuring method depends on the component modes used to reduce each subcomponent model. Methods such as Craig-Bampton have been used extensively to reduce linear finite-element models with thousands or even millions of degrees of freedom down orders of magnitude while maintaining acceptable accuracy. A novel reduction method is proposed here for geometrically nonlinear finite-element models using the fixed-interface and constraint modes of the linearized system to reduce each subcomponent model. The geometric nonlinearity requires an additional cubic and quadratic polynomial function in the modal equations, and the nonlinear stiffness coefficients are determined by applying a series of static loads and using the finite-element code to compute the response. The geometrically nonlinear, reduced modal equations for each subcomponent are then coupled by satisfying compatibility and force equilibrium. This modal substructuring approach is an extension of the Craig-Bampton method and is readily applied to geometrically nonlinear models built directly within commercial finite-element packages. The efficiency of this new approach is demonstrated on two example problems: one that couples two geometrically nonlinear beams at a shared rotational degree of freedom, and another that couples an axial spring element to the axial degree of freedom of a geometrically nonlinear beam. The nonlinear normal modes of the assembled models are compared with those of a truth model to assess the accuracy of the novel modal substructuring approach.
C1 [Kuether, Robert J.] Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
[Allen, Matthew S.] Univ Wisconsin, Dept Engn Phys, 535 Engn Res Bldg,1500 Engn Dr, Madison, WI 53706 USA.
[Hollkamp, Joseph J.] US Air Force, Res Lab, Struct Sci Ctr, RQHF, 2790 D St,Bldg 65, Wright Patterson AFB, OH 45433 USA.
RP Kuether, RJ (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.; Allen, MS (reprint author), Univ Wisconsin, Dept Engn Phys, 535 Engn Res Bldg,1500 Engn Dr, Madison, WI 53706 USA.; Hollkamp, JJ (reprint author), US Air Force, Res Lab, Struct Sci Ctr, RQHF, 2790 D St,Bldg 65, Wright Patterson AFB, OH 45433 USA.
EM rjkueth@sandia.gov; msallen@engr.wisc.edu; Joseph.Hollkamp@us.af.mil
FU U.S. Air Force Office of Scientific Research [FA9550-11-1-0035];
National Physical Science Consortium
FX The authors gratefully acknowledge the support of the U.S. Air Force
Office of Scientific Research under grant number FA9550-11-1-0035,
administered by David Stargel of the Multi-Scale Structural Mechanics
and Prognosis Program. R. J. Kuether would also like to acknowledge
funding from the National Physical Science Consortium Fellowship for
this research.
NR 45
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Z9 1
U1 3
U2 5
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0001-1452
EI 1533-385X
J9 AIAA J
JI AIAA J.
PD FEB
PY 2016
VL 54
IS 2
BP 691
EP 702
DI 10.2514/1.J054036
PG 12
WC Engineering, Aerospace
SC Engineering
GA DI1YY
UT WOS:000373294100026
ER
PT J
AU Granlund, KO
Ol, MV
Bernal, LP
AF Granlund, Kenneth O.
Ol, Michael V.
Bernal, Luis P.
TI Nonlinearity of Apparent Mass for Multielement Bodies
SO AIAA JOURNAL
LA English
DT Article; Proceedings Paper
CT 32nd AIAA Applied Aerodynamics Conference
CY JUN 16-20, 2014
CL Atlanta, GA
SP AIAA
ID LIFT
C1 [Granlund, Kenneth O.; Ol, Michael V.] US Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
[Bernal, Luis P.] Univ Michigan, Dept Aerosp Engn, Ann Arbor, MI 48109 USA.
RP Granlund, KO (reprint author), US Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
EM kenneth.granlund@gmail.com
NR 14
TC 0
Z9 0
U1 1
U2 1
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0001-1452
EI 1533-385X
J9 AIAA J
JI AIAA J.
PD FEB
PY 2016
VL 54
IS 2
BP 769
EP +
DI 10.2514/1.J054214
PG 6
WC Engineering, Aerospace
SC Engineering
GA DI1YY
UT WOS:000373294100034
ER
PT J
AU Selesnick, RS
AF Selesnick, R. S.
TI Stochastic simulation of inner radiation belt electron decay by
atmospheric scattering
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
DE radiation belt; electrons; Coulomb collisions; scattering; Monte Carlo
simulation
ID ELASTIC-SCATTERING; POSITRONS; PLASMA; MODEL
AB Decay of inner radiation belt electron intensity, resulting from elastic and inelastic collisions with neutral atoms, ions, and free electrons of the upper atmosphere, ionosphere, and plasmasphere, is described by stochastic Monte Carlo simulation. Modified collision cross sections allow detailed simulation of large-angle scattering and large-energy-loss collisions while preserving mean effective scattering and slowing-down rates resulting from all collisions. Scattering from bound electrons and -ray production are also included. Results show that traditional methods describing diffusion of the mirror point magnetic field, equivalent to diffusion in equatorial pitch angle, and energy loss by continuous slowing down aregenerally good approximations. Updated formulae for these approximations are provided. The drift-averaging approximation is also shown to provide a generally accurate description of trapped electron decay. The approximate methods overestimate decay rates by small factors, and the detailed stochastic simulation should be used when greater accuracy is required.
Key Points
C1 [Selesnick, R. S.] US Air Force, Res Lab, Space Veh Directorate, Kirtland AFB, NM USA.
RP Selesnick, RS (reprint author), US Air Force, Res Lab, Space Veh Directorate, Kirtland AFB, NM USA.
EM richard.selesnick@us.af.mil
FU NASA [NNH14AX18I]; Air Force Research Laboratory under the Heliophysics
Guest Investigators Program
FX This work was supported in part by NASA agreement NNH14AX18I with the
Air Force Research Laboratory under the Heliophysics Guest Investigators
Program. Software for evaluating the NRLMSISE-00 model was provided by
NRL (http://ccmc.gsfc.nasa.gov/modelweb/atmos/nrlmsise00.html); the
IGRF-12 model was provided by IAGA
(http://www.ngdc.noaa.gov/IAGA/vmod/igrf.html); software for evaluating
the GCPM model was provided by D. L. Gallagher. No other data were used
in producing this manuscript.
NR 19
TC 1
Z9 1
U1 1
U2 1
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9380
EI 2169-9402
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD FEB
PY 2016
VL 121
IS 2
BP 1249
EP 1262
DI 10.1002/2015JA022180
PG 14
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA DH7VN
UT WOS:000373002100022
ER
PT J
AU Huang, CS
AF Huang, Chao-Song
TI Plasma drifts and polarization electric fields associated with TID-like
disturbances in the low-latitude ionosphere: C/NOFS observations
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
DE equatorial ionosphere; traveling ionospheric disturbances; plasma drift;
polarization electric field
ID ATMOSPHERIC GRAVITY WAVES; CONJUGATE OBSERVATIONS; MU RADAR;
MIDLATITUDE; SATELLITE; BUBBLES
AB Medium-scale traveling ionospheric disturbances are often observed at the magnetically conjugate points in the nighttime midlatitude ionosphere. It has been suggested that gravity waves disturb the ionosphere and induce electric fields in one hemisphere and that the electric fields are amplified by the Perkins instability and transmitted along the geomagnetic field lines to the conjugate ionosphere, creating similar disturbances there. However, direct observations of electric fields associated with traveling ionospheric disturbances (TIDs) are very few. In this study, we present low-latitude TID-like disturbances observed by the Communication/Navigation Outage Forecasting System (C/NOFS) satellite. It is found that ion velocity perturbations are generated in the directions parallel and perpendicular to the geomagnetic field within TIDs. Both the parallel and perpendicular ion velocity perturbations show an in-phase correlation with the ion density perturbations. For nighttime TIDs, the amplitude of both the parallel and meridional ion velocity perturbations increases almost linearly with the amplitude of the ion density perturbations, and the meridional ion drift is proportional to the parallel ion velocity. For daytime TIDs, the parallel ion velocity perturbation increases with the ion density perturbation, but the meridional ion velocity perturbation does not change much. The observations provide evidence that polarization electric field is generated within TIDs at low latitudes and maps along the geomagnetic field lines over a large distance.
C1 [Huang, Chao-Song] Air Force Res Lab, Kirtland AFB, NM USA.
RP Huang, CS (reprint author), Air Force Res Lab, Kirtland AFB, NM USA.
EM chaosong.huang.1@us.af.mil
FU Air Force Research Laboratory; SMC Defense Weather Systems Directorate;
Department of Defense Space Test Program; National Aeronautics and Space
Administration; Naval Research Laboratory; Aerospace Corporation; NASA
[NNH15AZ81I]; CINDI team at the University of Texas at Dallas - NASA
[NAS5-01068]; NSF through Cornell University [AGS-1433968]
FX The C/NOFS mission is supported by the Air Force Research Laboratory,
the SMC Defense Weather Systems Directorate, the Department of Defense
Space Test Program, the National Aeronautics and Space Administration,
the Naval Research Laboratory, and The Aerospace Corporation. Work at
the Air Force Research Laboratory was supported in part by NASA grant
NNH15AZ81I. CINDI data are provided through the auspices of the CINDI
team at the University of Texas at Dallas supported by NASA grant
NAS5-01068. C/NOFS data are available in the NASA database
(http://cdaweb.gsfc.nasa.gov/istp_public/). The Jicamarca Radio
Observatory is a facility of the Instituto Geofisico del Peru operated
with support from the NSF AGS-1433968 through Cornell University.
NR 23
TC 1
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U1 0
U2 4
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9380
EI 2169-9402
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD FEB
PY 2016
VL 121
IS 2
BP 1802
EP 1812
DI 10.1002/2015JA022201
PG 11
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA DH7VN
UT WOS:000373002100064
ER
PT J
AU Kulatilaka, WD
Roy, S
Jiang, NB
Gord, JR
AF Kulatilaka, Waruna D.
Roy, Sukesh
Jiang, Naibo
Gord, James R.
TI Photolytic-interference-free, femtosecond, two-photon laser-induced
fluorescence imaging of atomic oxygen in flames
SO APPLIED PHYSICS B-LASERS AND OPTICS
LA English
DT Article
ID PICOSECOND EXCITATION; HYDROGEN; NANOSECOND; ABSORPTION
AB paves the way for two-dimensional imaging of O at kHz data rates. Such measurements can provide critical data for validating complex, multidimensional turbulent-combustion models as well as for investigating flame dynamics in practical combustion devices. Ultrashort-pulse lasers are well suited for nonlinear diagnostic techniques such as two-photon laserinduced fluorescence (TPLIF) because the signals generated scale as the laser intensity squared. Furthermore, the broad spectral bandwidths associated with nearly Fourier-transform-limited ultrashort pulses effectively contribute to efficient nonlinear excitation by coupling through a large number of in-phase photon pairs, thereby producing strong fluorescence signals. Additionally, femtosecond (fs)-duration amplified laser systems typically operate at 1-10 kHz repetition rates, enabling high-repetition-rate imaging in dynamic environments. In previous experiments, we have demonstrated utilization of fs pulses for kilohertz (kHz)-rate, interference-free imaging of atomic hydrogen (H) in flames. In the present study, we investigate the utilization of fs-duration pulses to photolytic-interference-free TPLIF imaging of atomic oxygen (O). In TPLIF of O, photodissociation of vibrationally excited carbon dioxide (CO2) is known to be the prominent interference that produces additional O atoms in the medium. We have found that through the use of fs excitation, such interferences can be virtually eliminated in premixed laminar methane flames, which paves the way for two-dimensional imaging of O at kHz data rates. Such measurements can provide critical data for validating complex, multidimensional turbulent-combustion models as well as for investigating flame dynamics in practical combustion devices.
C1 [Kulatilaka, Waruna D.; Roy, Sukesh; Jiang, Naibo] Spectral Energies LLC, 5100 Springfield St,Suite 301, Dayton, OH 45431 USA.
[Gord, James R.] US Air Force, Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
[Kulatilaka, Waruna D.] Texas A&M Univ, Dept Mech Engn, 3123 TAMU, College Stn, TX 77843 USA.
RP Roy, S (reprint author), Spectral Energies LLC, 5100 Springfield St,Suite 301, Dayton, OH 45431 USA.; Gord, JR (reprint author), US Air Force, Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
EM sroy@woh.rr.com; james.gord@us.af.mil
FU United States Air Force Research Laboratory [FA8650-15-D-2580]; United
States Air Force Office of Scientific Research
FX Funding for this research was provided by the United States Air Force
Research Laboratory under Contract No. FA8650-15-D-2580 and by the
United States Air Force Office of Scientific Research (Dr. Enrique
Parra, Program Manager).
NR 26
TC 2
Z9 2
U1 7
U2 13
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0946-2171
EI 1432-0649
J9 APPL PHYS B-LASERS O
JI Appl. Phys. B-Lasers Opt.
PD FEB
PY 2016
VL 122
IS 2
AR UNSP 26
DI 10.1007/s00340-016-6330-2
PG 7
WC Optics; Physics, Applied
SC Optics; Physics
GA DG7HZ
UT WOS:000372256700004
ER
PT J
AU Roman, AJ
Kreitzer, PJ
Ervin, JS
Hanchak, MS
Byrd, LW
AF Roman, Abdeel J.
Kreitzer, Paul J.
Ervin, Jamie S.
Hanchak, Michael S.
Byrd, Larry W.
TI Flow pattern identification of horizontal two-phase refrigerant flow
using neural networks
SO INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
LA English
DT Article
DE Electrical capacitance tomography; Neural network; Refrigerant
ID ELECTRICAL CAPACITANCE TOMOGRAPHY; GAS-LIQUID
AB In this work, electrical capacitance tomography (ECT) and neural networks were used to automatically identify two-phase flow patterns for refrigerant R-134a flowing in a horizontal tube. In laboratory experiments, high-speed images were recorded for human classification of liquid-vapor flow patterns. The corresponding permittivity data obtained from tomograms was then used to train feedforward neural networks to recognize flow patterns. An objective was to determine which subsets of data derived from tomograms could be used as input data by a neural network to classify nine liquid-vapor flow patterns. Another objective was to determine which subsets of input data provide high identification success when analyzed by a neural network. Transitional flow patterns associated with common horizontal flow patterns were considered. A unique feature of the current work was the use of the vertical center of mass coordinate in pattern classification. The highest classification success rates occurred using neural network input which included the probability density functions (in time) for both spatially averaged permittivity and center of mass location in addition to the four statistical moments (in time) for spatially averaged permittivity data. The combination of these input data resulted in an average success rate of 98.1% for nine flow patterns. In addition, 99% of the experimental runs were either correctly classified or misclassified by only one flow pattern. (C) 2015 Elsevier Ltd. All rights reserved.
C1 [Roman, Abdeel J.; Byrd, Larry W.] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Kreitzer, Paul J.] UES Inc, Dayton, OH 45432 USA.
[Ervin, Jamie S.; Hanchak, Michael S.] Univ Dayton, Res Inst, Dayton, OH 45469 USA.
RP Ervin, JS (reprint author), Univ Dayton, Res Inst, Dayton, OH 45469 USA.
EM jervin1@udayton.edu
FU U.S. Air Force [FA8650-D-12-2224(TO0001)]; Mechanical and Thermal
Systems Branch of the Air Force Research Laboratory (AFRL/RQQM)
FX This material is based on research sponsored by U.S. Air Force Contract
No. FA8650-D-12-2224(TO0001). The authors are grateful for support from
the Mechanical and Thermal Systems Branch of the Air Force Research
Laboratory (AFRL/RQQM). The views and conclusions contained herein are
those of the authors and should not be interpreted as necessarily
representing the official policies or endorsements, either expressed or
implied, of U.S. Air Force Office of Scientific Research or the U.S.
Government.
NR 24
TC 0
Z9 0
U1 6
U2 10
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0735-1933
EI 1879-0178
J9 INT COMMUN HEAT MASS
JI Int. Commun. Heat Mass Transf.
PD FEB
PY 2016
VL 71
BP 254
EP 264
DI 10.1016/j.icheatmasstransfer.2015.12.033
PG 11
WC Thermodynamics; Mechanics
SC Thermodynamics; Mechanics
GA DG2ZV
UT WOS:000371940200028
ER
PT J
AU Coutu, RA
Medvedev, IR
Petkie, DT
AF Coutu, Ronald A., Jr.
Medvedev, Ivan R.
Petkie, Douglas T.
TI Improved Sensitivity MEMS Cantilever Sensor for Terahertz Photoacoustic
Spectroscopy
SO SENSORS
LA English
DT Article
DE cantilever; photoacoustic; MEMS; terahertz
ID GAS-ANALYSIS; MICROPHONE; SILICON
AB In this paper, a microelectromechanical system (MEMS) cantilever sensor was designed, modeled and fabricated to measure the terahertz (THz) radiation induced photoacoustic (PA) response of gases under low vacuum conditions. This work vastly improves cantilever sensitivity over previous efforts, by reducing internal beam stresses, minimizing out of plane beam curvature and optimizing beam damping. In addition, fabrication yield was improved by approximately 50% by filleting the cantilever's anchor and free end to help reduce high stress areas that occurred during device fabrication and processing. All of the cantilever sensors were fabricated using silicon-on-insulator (SOI) wafers and tested in a custom built, low-volume, vacuum chamber. The resulting cantilever sensors exhibited improved signal to noise ratios, sensitivities and normalized noise equivalent absorption (NNEA) coefficients of approximately 4.28 x 10(-10) cm(-1)center dot WHz(-1/2). This reported NNEA represents approximately a 70% improvement over previously fabricated and tested SOI cantilever sensors for THz PA spectroscopy.
C1 [Coutu, Ronald A., Jr.] US Air Force, Inst Technol, Dept Elect & Comp Engn, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
[Medvedev, Ivan R.; Petkie, Douglas T.] Wright State Univ, Dept Phys, 3640 Colonel Glenn Highway, Dayton, OH 45435 USA.
RP Coutu, RA (reprint author), US Air Force, Inst Technol, Dept Elect & Comp Engn, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM Ronald.Coutu@afit.edu; ivan.medvedev@wright.edu; doug.petkie@wright.edu
FU Air Force Office of Scientific Research (AFOSR) [F4FGA04013J001]
FX The authors thank the Air Force Office of Scientific Research (AFOSR)
for funding this effort (F4FGA04013J001) and the Air Force Research
Laboratory (AFRL) Sensors Directorate for assistance with fabrication;
Nathan Glauvitz for conducting the initial research; Richard Newberry
for assisting with fabrication and data collection; the AFIT cleanroom
staff, Rich Johnston and Tom Stevenson for their assistance.
NR 25
TC 0
Z9 0
U1 9
U2 15
PU MDPI AG
PI BASEL
PA POSTFACH, CH-4005 BASEL, SWITZERLAND
SN 1424-8220
J9 SENSORS-BASEL
JI Sensors
PD FEB
PY 2016
VL 16
IS 2
DI 10.3390/s16020251
PG 11
WC Chemistry, Analytical; Electrochemistry; Instruments & Instrumentation
SC Chemistry; Electrochemistry; Instruments & Instrumentation
GA DG0WX
UT WOS:000371787800046
PM 26907280
ER
PT J
AU Wang, L
Gutierrez-Cuevas, KG
Urbas, A
Li, Q
AF Wang, Ling
Gutierrez-Cuevas, Karla G.
Urbas, Augustine
Li, Quan
TI Near-Infrared Light-Directed Handedness Inversion in Plasmonic
Nanorod-Embedded Helical Superstructure
SO ADVANCED OPTICAL MATERIALS
LA English
DT Article
ID CHOLESTERIC LIQUID-CRYSTALS; CHIRAL MOLECULAR SWITCHES; GOLD NANORODS;
REFLECTION; LUMINESCENCE; ASSEMBLIES; PHASES; DNA; 3D
C1 [Wang, Ling; Gutierrez-Cuevas, Karla G.; Li, Quan] Kent State Univ, Inst Liquid Crystal, Kent, OH 44242 USA.
[Wang, Ling; Gutierrez-Cuevas, Karla G.; Li, Quan] Kent State Univ, Chem Phys Interdisciplinary Program, Kent, OH 44242 USA.
[Urbas, Augustine] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Li, Q (reprint author), Kent State Univ, Inst Liquid Crystal, Kent, OH 44242 USA.; Li, Q (reprint author), Kent State Univ, Chem Phys Interdisciplinary Program, Kent, OH 44242 USA.
EM qli1@kent.edu
FU AFOSR [FA9950-09-1-0254]; CONACYT [211982]; Ohio Research Scholars
Program Research Cluster on Surfaces in Advanced Materials
FX L.W. and K. G. G.-C. contributed equally to this work. Q. Li thanks the
AFOSR (FA9950-09-1-0254) and the CONACYT Scholarship 211982 to K. G. C.
The TEM data were obtained at the ( cryo) TEM facility at the Liquid
Crystal Institute, Kent State University, supported by the Ohio Research
Scholars Program Research Cluster on Surfaces in Advanced Materials.
NR 39
TC 6
Z9 6
U1 22
U2 33
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA POSTFACH 101161, 69451 WEINHEIM, GERMANY
SN 2195-1071
J9 ADV OPT MATER
JI Adv. Opt. Mater.
PD FEB
PY 2016
VL 4
IS 2
BP 247
EP 251
DI 10.1002/adom.201500533
PG 5
WC Materials Science, Multidisciplinary; Optics
SC Materials Science; Optics
GA DF3SY
UT WOS:000371269300005
ER
PT J
AU Braginsky, M
Przybyla, CP
AF Braginsky, M.
Przybyla, C. P.
TI Simulation of crack propagation/deflection in ceramic matrix continuous
fiber reinforced composites with weak interphase via the extended finite
element method
SO COMPOSITE STRUCTURES
LA English
DT Article
DE Crack deflection; Ceramic matrix composites; XFEM; Fracture
ID DISSIMILAR ELASTIC-MATERIALS; KINKING CRACKS; INTERFACE; DEFLECTION;
CRITERION; GROWTH; PERFORMANCE; MECHANISM; DESIGN; MODE
AB Toughness in continuous ceramic fiber reinforced ceramic matrix composites (CMCs) with dense matrices depends on the properties of the fiber coating or interphase. Multiple criteria have been proposed to describe the mechanism of crack propagation/deflection at the filament scale in brittle matrix continuous fiber reinforced composites; however, most of these criteria fail to account for the presence of an interphase of finite thickness and/or employ unrealistic boundary conditions. Recent simulations employing the extended finite element method (XFEM) have shown that variations in interphase thickness and strength relative to the fibers and/or matrix can have a significant influence on the crack propagation/deflection mechanism. It is shown that primary crack deflection most often occurs when conditions favor secondary cracking in the interphase in front of an approaching matrix crack. Although this mechanism is similar to that argued by Cook and Gordon (1964), the simulations here indicate that the conditions for secondary crack initiation and deflection of the primary crack can be much different than that which was originally presented in their analytical model. Variations in the properties of the interphase are simulated to produce large deviations in the local crack growth behavior as a matrix crack grows into interphase. Results are discussed relative to what has been observed experimentally. Published by Elsevier Ltd.
C1 [Braginsky, M.; Przybyla, C. P.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH USA.
[Braginsky, M.] Univ Dayton, Res Inst, Dayton, OH 45469 USA.
RP Przybyla, CP (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH USA.
EM craig.przybyla@us.af.mil
FU Air Force Office of Scientific Research [14RX06COR]
FX This work was in part funded by the Air Force Office of Scientific
Research, task #14RX06COR with Dr. David Stargel as the program manager.
NR 33
TC 0
Z9 0
U1 8
U2 16
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0263-8223
EI 1879-1085
J9 COMPOS STRUCT
JI Compos. Struct.
PD FEB
PY 2016
VL 136
BP 538
EP 545
DI 10.1016/j.compstruct.2015.10.038
PG 8
WC Materials Science, Composites
SC Materials Science
GA DF3XW
UT WOS:000371282900051
ER
PT J
AU Patterson, AT
Beasley, KJ
Kobayashi, TT
AF Patterson, Andrew T.
Beasley, Knox J.
Kobayashi, Todd T.
TI Fibroelastolytic papulosis: histopathologic confirmation of disease
spectrum variants in a single case
SO JOURNAL OF CUTANEOUS PATHOLOGY
LA English
DT Article
DE fibroelastolytic papulosis; papillary dermal elastosis; pseudoxanthoma
elasticum-like papillary dermal elastolysis; white fibrous papulosis of
the neck
ID PAPILLARY DERMAL ELASTOLYSIS; WHITE FIBROUS PAPULOSIS; ELASTIC TISSUE;
ACQUIRED DISORDERS; NECK; MANIFESTATION
AB Fibroelastolytic papulosis is a rare, acquired fibroelastolytic disorder that presents clinically as white-to-yellow papules and plaques most commonly occurring on the neck of elderly patients. The term fibroelastolytic papulosis encompasses two closely related conditions previously described as pseudoxanthoma elasticum-like papillary dermal elastolysis (PDE) and white fibrous papulosis of the neck (WFPN). Here we present a case of a 78-year-old white female with a several-year history of numerous, asymptomatic 2-3mm yellowish, non-follicular papules distributed symmetrically over the posterior neck, axillae, arm and antecubital fossae. Histopathologic examination revealed thickened and clumped elastotic fibers admixed with thick, sclerotic appearing collagen bundles in the mid and deep reticular dermis. Rare melanophages, loss of vertically oriented elastic fibers and scattered elastotic globes were noted in the papillary dermis. Based on the shared clinicopathologic features showed in this case, strong consideration should be made for the additional inclusion of papillary dermal elastosis as existing along the disease continuum of fibroelastolytic papulosis. This occurrence of fibroelastolytic papulosis shows unique histopathologic findings of pseudoxanthoma elasticum-like PDE, papillary dermal elastosis and WFPN, further supporting the theory that these entities exist as variants along the fibroelastolytic papulosis spectrum.
C1 [Patterson, Andrew T.] Ohio State Univ, Coll Med, Columbus, OH 43210 USA.
[Patterson, Andrew T.; Beasley, Knox J.; Kobayashi, Todd T.] San Antonio Uniformed Serv Hlth Educ Consortium, Dept Dermatol, San Antonio, TX USA.
RP Beasley, KJ (reprint author), San Antonio Uniformed Serv Hlth Educ Consortium, Dermatol Clin, Dept Dermatol, 59MDOS SGO5D,2200 Bergquist Dr,Suite 1, Lackland AFB, TX 78236 USA.
EM Knox.Beasley@us.af.mil
NR 21
TC 1
Z9 1
U1 1
U2 3
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0303-6987
EI 1600-0560
J9 J CUTAN PATHOL
JI J. Cutan. Pathol.
PD FEB
PY 2016
VL 43
IS 2
BP 142
EP 147
DI 10.1111/cup.12569
PG 6
WC Dermatology; Pathology
SC Dermatology; Pathology
GA DF5ZA
UT WOS:000371431100007
PM 26260852
ER
PT J
AU Distefano, J
Lin, YC
Robinson, J
Glavin, NR
Voevodin, AA
Brockman, J
Kuhn, M
French, B
King, SW
AF Distefano, Jennifer
Lin, Yu-Chuan
Robinson, Joshua
Glavin, Nicholas R.
Voevodin, Andrey A.
Brockman, Justin
Kuhn, Markus
French, Benjamin
King, Sean W.
TI Band Alignment at Molybdenum Disulphide/Boron Nitride/Aluminum Oxide
Interfaces
SO JOURNAL OF ELECTRONIC MATERIALS
LA English
DT Article
DE Boron nitride; molybdenum disulfide; sapphire; aluminum oxide; x-ray
photoelectron spectroscopy; valence band offset; BN; MoS2; Al2O3
ID HEXAGONAL-BORON-NITRIDE; LAYERED SEMICONDUCTOR; ELECTRONIC-PROPERTIES;
MOS2 TRANSISTORS; FEW-LAYER; HETEROSTRUCTURES; DISCONTINUITY;
DEPOSITION; OFFSETS
AB To facilitate the design of future heterostructure devices employing two-dimensional (2D) materials such as molybdenum disulphide (MoS2) and hexagonal/sp(2) boron nitride (BN), x-ray photoelectron spectroscopy (XPS) has been utilized to determine the valence band offset (VBO) present at interfaces formed between these materials. For MoS2 grown on a pulsed laser-deposited amorphous BN (a-BN) layer with sp(2) bonding, the VBO was determined to be 1.4 +/- 0.2 eV. Similarly, the VBO between the a-BN layer and the aluminum oxide (Al2O3) substrate was determined to be 1.1 +/- 0.2 eV. Using the band gaps established in the literature for MoS2, h-BN, and Al2O3, the conduction band offsets (CBOs) at the MoS2/a-BN and a-BN/Al2O3 interfaces were additionally calculated to be 3.3 +/- 0.2 and 1.7 +/- 0.2 eV, respectively. The resulting large VBOs and CBOs indicate BN and Al2O3 are attractive gate dielectrics and substrates for future 2D MoS2 devices.
C1 [Distefano, Jennifer; Lin, Yu-Chuan; Robinson, Joshua] Penn State Univ, Ctr Two Dimens & Layered Mat, Dept Mat Sci & Engn, University Pk, PA 16802 USA.
[Glavin, Nicholas R.; Voevodin, Andrey A.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Voevodin, Andrey A.] Univ N Texas, Dept Mat Sci & Engn, Denton, TX 76203 USA.
[Brockman, Justin; Kuhn, Markus; King, Sean W.] Intel Corp, Log Technol Dev, Hillsboro, OR 97124 USA.
[French, Benjamin] Intel Corp, Ocotillo Mat Lab, Chandler, AZ 85248 USA.
RP King, SW (reprint author), Intel Corp, Log Technol Dev, Hillsboro, OR 97124 USA.
EM sean.king@intel.com
FU Center for Low Energy Systems Technology (LEAST); STARnet phase of the
Focus Center Research Program (FCRP); Microelectronics Advanced Research
Corp. (MARCO); Defense Advanced Research Projects Agency (DARPA); Air
Force Office of Scientific Research Aerospace Materials for Complex
Materials and Devices program [15RXCOR184]
FX This work was partially supported by the Center for Low Energy Systems
Technology (LEAST), one of six centers supported by the STARnet phase of
the Focus Center Research Program (FCRP), a Semiconductor Research
Corporation (SRC) program sponsored by the Microelectronics Advanced
Research Corp. (MARCO) and the Defense Advanced Research Projects Agency
(DARPA). Financial support from the Air Force Office of Scientific
Research Aerospace Materials for Complex Materials and Devices program
(15RXCOR184) is also acknowledged.
NR 46
TC 2
Z9 2
U1 11
U2 27
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0361-5235
EI 1543-186X
J9 J ELECTRON MATER
JI J. Electron. Mater.
PD FEB
PY 2016
VL 45
IS 2
BP 983
EP 988
DI 10.1007/s11664-015-4255-x
PG 6
WC Engineering, Electrical & Electronic; Materials Science,
Multidisciplinary; Physics, Applied
SC Engineering; Materials Science; Physics
GA DF2JA
UT WOS:000371167600015
ER
PT J
AU Ware, TH
Biggins, JS
Shick, AF
Warner, M
White, TJ
AF Ware, Taylor H.
Biggins, John S.
Shick, Andreas F.
Warner, Mark
White, Timothy J.
TI Localized soft elasticity in liquid crystal elastomers
SO NATURE COMMUNICATIONS
LA English
DT Article
ID POLYMER NETWORKS; COMPOSITES; MECHANICS
AB Synthetic approaches to prepare designer materials that localize deformation, by combining rigidity and compliance in a single material, have been widely sought. Bottom-up approaches, such as the self-organization of liquid crystals, offer potential advantages over top-down patterning methods such as photolithographic control of crosslink density, relating to the ease of preparation and fidelity of resolution. Here, we report on the directed self-assembly of materials with spatial and hierarchical variation in mechanical anisotropy. The highly nonlinear mechanical properties of the liquid crystalline elastomers examined here enables strain to be locally reduced >15-fold without introducing compositional variation or other heterogeneities. Each domain (>= 0.01mm(2)) exhibits anisotropic nonlinear response to load based on the alignment of the molecular orientation with the loading axis. Accordingly, we design monoliths that localize deformation in uniaxial and biaxial tension, shear, bending and crack propagation, and subsequently demonstrate substrates for globally deformable yet locally stiff electronics.
C1 [Ware, Taylor H.; Shick, Andreas F.; White, Timothy J.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Ware, Taylor H.] Univ Texas Dallas, Dept Bioengn, Richardson, TX 75080 USA.
[Biggins, John S.; Warner, Mark] Univ Cambridge, Cavendish Lab, Cambridge CH3 0HE, England.
RP White, TJ (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM timothy.white.24@us.af.mil
RI Ware, Taylor/A-7130-2017
OI Ware, Taylor/0000-0001-7996-7393
FU Materials and Manufacturing Directorate; Office of Scientific Research
of the Air Force Research Laboratory
FX T.H.W., A.F.S. and T.J.W. would like to acknowledge financial support
from the Materials and Manufacturing Directorate and the Office of
Scientific Research of the Air Force Research Laboratory.
NR 22
TC 4
Z9 4
U1 22
U2 70
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 2041-1723
J9 NAT COMMUN
JI Nat. Commun.
PD FEB
PY 2016
VL 7
AR 10781
DI 10.1038/ncomms10781
PG 7
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA DF0PF
UT WOS:000371040600002
PM 26902873
ER
PT J
AU Gruneisen, MT
Sickmiller, BA
Flanagan, MB
Black, JP
Stoltenberg, KE
Duchane, AW
AF Gruneisen, Mark T.
Sickmiller, Brett A.
Flanagan, Michael B.
Black, James P.
Stoltenberg, Kurt E.
Duchane, Alexander W.
TI Adaptive spatial filtering of daytime sky noise in a satellite quantum
key distribution downlink receiver
SO OPTICAL ENGINEERING
LA English
DT Article
DE quantum key distribution; adaptive optics; decoy states; quantum
information; cryptography; sky radiance
ID FREE-SPACE; OPTICS SYSTEMS; CRYPTOGRAPHY; SECURITY; POLARIZATION;
DAYLIGHT
AB Spatial filtering is an important technique for reducing sky background noise in a satellite quantum key distribution downlink receiver. Atmospheric turbulence limits the extent to which spatial filtering can reduce sky noise without introducing signal losses. Using atmospheric propagation and compensation simulations, the potential benefit of adaptive optics (AO) to secure key generation (SKG) is quantified. Simulations are performed assuming optical propagation from a low-Earth-orbit satellite to a terrestrial receiver that includes AO. Higher-order AO correction is modeled assuming a Shack-Hartmann wavefront sensor and a continuous-face-sheet deformable mirror. The effects of atmospheric turbulence, tracking, and higher-order AO on the photon capture efficiency are simulated using statistical representations of turbulence and a time-domain wave-optics hardware emulator. SKG rates are calculated for a decoy-state protocol as a function of the receiver field of view for various strengths of turbulence, sky radiances, and pointing angles. The results show that at fields of view smaller than those discussed by others, AO technologies can enhance SKG rates in daylight and enable SKG where it would otherwise be prohibited as a consequence of background optical noise and signal loss due to propagation and turbulence effects. (C) The Authors. Published by SPIE
C1 [Gruneisen, Mark T.; Duchane, Alexander W.] Air Force Res Lab, Directed Energy Directorate, 3550 Aberdeen Ave SE, Kirtland AFB, NM 87117 USA.
[Sickmiller, Brett A.; Flanagan, Michael B.] Leidos, 2109 Air Pk Rd SE, Albuquerque, NM 87106 USA.
[Black, James P.; Stoltenberg, Kurt E.] Boeing Co, POB 5670, Albuquerque, NM 87185 USA.
RP Gruneisen, MT (reprint author), Air Force Res Lab, Directed Energy Directorate, 3550 Aberdeen Ave SE, Kirtland AFB, NM 87117 USA.
FU Air Force Office of Scientific Research
FX The authors gratefully acknowledge important discussions with Earl
Spillar and Imelda Atencio (De La Rue). This work was supported by the
Air Force Office of Scientific Research.
NR 58
TC 1
Z9 1
U1 1
U2 5
PU SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA
SN 0091-3286
EI 1560-2303
J9 OPT ENG
JI Opt. Eng.
PD FEB
PY 2016
VL 55
IS 2
AR 026104
DI 10.1117/1.OE.55.2.026104
PG 11
WC Optics
SC Optics
GA DF3YD
UT WOS:000371283600027
ER
PT J
AU Zhdanov, BV
Rotondaro, MD
Shaffer, MK
Knize, RJ
AF Zhdanov, Boris V.
Rotondaro, Matthew D.
Shaffer, Michael K.
Knize, Randall J.
TI Low-pressure cesium and potassium diode pumped alkali lasers: pros and
cons
SO OPTICAL ENGINEERING
LA English
DT Article
DE atomic gas lasers; lasers; diode-pumped; diode pumped alkali lasers
ID 795-NM RUBIDIUM LASER; VAPOR LASER; CS LASER; POWER; MODEL
AB This paper presents the results of our experiments on a comparative study of cesium and potassium diode pumped alkali lasers (DPALs) aimed to determine which of these two lasers has more potential to scale to high powers. For both lasers, we have chosen a "low-pressure DPAL approach," which uses buffer gas pressure of about 1 atm for spin-orbit mixing of the excited states of alkali atoms to provide population inversion in the gain medium. The goal of this study was to determine power-limiting effects, which affect the performance of these DPALs, and find out how these limiting effects can be mitigated. We studied the performance of both lasers in CW and pulsed modes using both static and flowing gain medium and pump with different pulse duration. We observed output power degradation in time from the initial value to the level corresponding to the CW mode of operation. As a result of this study, some essential positive and negative features of both DPALs were revealed, which should be taken into account for power-scaling experiments. (C) 2016 Society of Photo-Optical Instrumentation Engineers (SPIE)
C1 [Zhdanov, Boris V.; Rotondaro, Matthew D.; Shaffer, Michael K.; Knize, Randall J.] US Air Force Acad, Laser & Opt Res Ctr, 2354 Fairchild Dr,Suite 2A31, Colorado Springs, CO 80840 USA.
RP Zhdanov, BV (reprint author), US Air Force Acad, Laser & Opt Res Ctr, 2354 Fairchild Dr,Suite 2A31, Colorado Springs, CO 80840 USA.
EM boris.zhdanov.ctr@usafa.edu
FU High Energy Lasers Joint Technology Office
FX We acknowledged the support of the High Energy Lasers Joint Technology
Office.
NR 17
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Z9 2
U1 7
U2 11
PU SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA
SN 0091-3286
EI 1560-2303
J9 OPT ENG
JI Opt. Eng.
PD FEB
PY 2016
VL 55
IS 2
AR 026105
DI 10.1117/1.OE.55.2.026105
PG 6
WC Optics
SC Optics
GA DF3YD
UT WOS:000371283600028
ER
PT J
AU Peou, S
Milliard-Hasting, B
Shah, SA
AF Peou, Sokunthea
Milliard-Hasting, Brittany
Shah, Sachin A.
TI Impact of avocado-enriched diets on plasma lipoproteins: A meta-analysis
SO JOURNAL OF CLINICAL LIPIDOLOGY
LA English
DT Article
DE Lipoproteins; Diet; MUFA; Cholesterol; Meta-analysis
ID MONOUNSATURATED FATTY-ACIDS; CARDIOVASCULAR RISK-FACTORS;
CORONARY-HEART-DISEASE; MEDITERRANEAN DIET; SERUM-LIPIDS;
DENSITY-LIPOPROTEIN; JERUSALEM NUTRITION; WEIGHT-LOSS; RICH DIET;
CHOLESTEROL
AB BACKGROUND: Optimizing plasma lipoproteins is the primary goal of pharmacotherapy and diet interventions in people at risk for cardiovascular diseases. Avocados offer a rich source of monounsaturated fat and may pose beneficial effects on the lipid profile.
OBJECTIVE: We aimed to perform a meta-analysis of randomized clinical trials assessing the impact of avocados on TC, low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol, and/or triglycerides (TG).
METHODS: We searched PUBMED, Cumulative Index to Nursing and Allied Health Literature, Index to Nursing and Allied Health Literature, and the Cochrane Database of Systemic Reviews from their inception to February 2015. The weighted mean difference from baseline was calculated for all endpoints. Subgroup analyses were performed to assess heterogeneity, and funnel plots inspected to assess publication bias.
RESULTS: Ten unique studies (n = 229) were included. Avocado consumption significantly reduced TC, LDL-C, and TG by -18.80 mg/dL (95% confidence interval [CI], -24.56 to -13.05; I-2, 46.9%), -16.50 mg/dL (95% CI, -22.91 to -10.10; I-2, 72.5%), -27.20 mg/dL (95% CI, -44.41 to -9.99; I-2, 91.1%) respectively. High-density lipoprotein cholesterol decreased nonsignificantly by -0.18 mg/dL (95% CI, -3.23 to 2.88; I-2, 84.8%).
CONCLUSION: Avocado-substituted diets significantly decrease TC, LDL-C, and TG levels. Substituting dietary fats with avocados versus adding to the free diet should be the primary recommendation strategy. Larger trials looking at the impact of avocados on major adverse cardiovascular events are warranted. (C) 2016 National Lipid Association. Published by Elsevier Inc.
C1 [Peou, Sokunthea] Travis AFB, David Grant Med Ctr, Dept Pharm, Fairfield, CA 94535 USA.
[Milliard-Hasting, Brittany] Travis AFB, David Grant Med Ctr, Clin Invest Facil, Travis AFB, CA 94535 USA.
[Peou, Sokunthea; Shah, Sachin A.] Univ Pacific, Thomas J Long Sch Pharm & Hlth Sci, Dept Pharm Practice, Stockton, CA 95211 USA.
RP Shah, SA (reprint author), Univ Pacific, Thomas J Long Sch Pharm & Hlth Sci, David Grant Med Ctr, 3601 Pacific Ave, Stockton, CA 95204 USA.
EM sshah@pacific.edu
NR 48
TC 0
Z9 0
U1 5
U2 15
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 1933-2874
EI 1876-4789
J9 J CLIN LIPIDOL
JI J. Clin. Lipidol.
PD FEB
PY 2016
VL 10
IS 1
BP 161
EP 171
DI 10.1016/j.jacl.2015.10.011
PG 11
WC Pharmacology & Pharmacy
SC Pharmacology & Pharmacy
GA DE9WT
UT WOS:000370991300017
PM 26892133
ER
PT J
AU Berke, RB
Sebastian, CM
Chona, R
Patterson, EA
Lambros, J
AF Berke, R. B.
Sebastian, C. M.
Chona, R.
Patterson, E. A.
Lambros, J.
TI High Temperature Vibratory Response of Hastelloy-X: Stereo-DIC
Measurements and Image Decomposition Analysis
SO EXPERIMENTAL MECHANICS
LA English
DT Article
DE Stereo digital image correlation; High temperature measurement;
Thermo-acoustic loading; Induction heating; Image decomposition analysis
ID SOLID MECHANICS MODELS; VALIDATION
AB The mechanical behavior of solids in combined high-temperature and vibratory environments, such as those experienced during hypersonic flight, are historically not well explored. In this work on Hastelloy-X plates, elevated temperatures were achieved by induction heating and periodic vibratory loading was applied using a shaker. Surface displacements and strains were measured using stereo digital image correlation (DIC) in the blue spectrum to alleviate issues associated with thermal radiation. Through the use of image decomposition techniques the resultant high-quality experimental data were used to validate numerical simulations of combined thermoacoustic loading. The simulations were based on the deformed shape and the corresponding temperature distributions measured experimentally as well as taking into account the thermal dependence of Hastelloy-X mechanical properties.
C1 [Berke, R. B.; Lambros, J.] Univ Illinois, Dept Aerosp Engn, 306 Talbot Lab, Urbana, IL 61801 USA.
[Berke, R. B.] Utah State Univ, Dept Mech & Aerosp Engn, 4130 Old Main Hill, Logan, UT 84322 USA.
[Sebastian, C. M.; Patterson, E. A.] Univ Liverpool, Sch Engn, Brownlow Hill, Liverpool L69 3GH, Merseyside, England.
[Chona, R.] US Air Force, Res Lab, Struct Sci Ctr, Dayton, OH 45433 USA.
RP Berke, RB (reprint author), Univ Illinois, Dept Aerosp Engn, 306 Talbot Lab, Urbana, IL 61801 USA.; Berke, RB (reprint author), Utah State Univ, Dept Mech & Aerosp Engn, 4130 Old Main Hill, Logan, UT 84322 USA.
EM ryan.berke@usu.edu
RI Patterson, Eann/A-2148-2009
FU Air Force Office of Scientific Research; Air Force Material Command;
USAF [FA8655-11-3083, FA9550-12-1-0386]; Royal Society Wolfson Research
Merit Award; Royal Academy of Engineering Distinguished Visiting
Fellowship
FX This effort was sponsored by the Air Force Office of Scientific
Research, Air Force Material Command, USAF under grant numbers
FA8655-11-3083 and FA9550-12-1-0386. The U.S. Government is authorized
to reproduce and distribute reprints of Governmental purpose
notwithstanding any copyright notation thereon. Major Matt Synder
(EOARD) and Dr. David Stargel (AFOSR) respectively are the program
officers for these grants. EAP is the recipient of a Royal Society
Wolfson Research Merit Award. The collaboration that was central to this
study was supported by a Royal Academy of Engineering Distinguished
Visiting Fellowship awarded to JL.
NR 19
TC 0
Z9 0
U1 5
U2 12
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0014-4851
EI 1741-2765
J9 EXP MECH
JI Exp. Mech.
PD FEB
PY 2016
VL 56
IS 2
BP 231
EP 243
DI 10.1007/s11340-015-0092-3
PG 13
WC Materials Science, Multidisciplinary; Mechanics; Materials Science,
Characterization & Testing
SC Materials Science; Mechanics
GA DD8FA
UT WOS:000370159600007
ER
PT J
AU Preston, DN
Brown, GW
Sandstrom, MM
Pollard, CJ
Warner, KF
Remmers, DL
Phillips, JJ
Shelley, TJ
Reyes, JA
Hsu, PC
Reynolds, JG
AF Preston, Daniel N.
Brown, Geoffrey W.
Sandstrom, Mary M.
Pollard, Colin J.
Warner, Kirstin F.
Remmers, Daniel L.
Phillips, Jason J.
Shelley, Timothy J.
Reyes, Jose A.
Hsu, Peter C.
Reynolds, John G.
TI Small-Scale Safety Testing of Ammonium Nitrate and Mixtures
SO PROPELLANTS EXPLOSIVES PYROTECHNICS
LA English
DT Article
DE Safety testing; Ammonium nitrate; Gunpowder; Impact sensitivity;
Ammonium nitrate mixtures
AB Ammonium nitrate (AN), gunpowder (GP), and an ammonium nitrate gunpowder mixture (AN/GP) were studied for impact sensitivity by four laboratories using the drop hammer apparatus. Bruceton and Neyer methods were used as experimental protocols and for data reduction. The results are presented as 50% probability of reaction (DH50). For AN, the DH50 values are widely varied among the participants, from sensitive to completely insensitive (limit of the equipment), with no real correlation among results. GP and the AN/GP mixture exhibited much more sensitivity overall and were in some cases within statistical values extrapolated from previous studies of RDX. The variability in results for the AN data is attributed to the difficulty in determining a positive reaction event for AN, as detailed by Neyer experiments and photography during positive reactions. Variability in results for the GP and AN/GP mixtures is attributed to equipment environment and detection criteria. This work was performed by the Integrated Data Collection Analysis (IDCA) program, a multi-laboratory effort to standardize safety testing of improvised or homemade explosives funded by the Department of Homeland Security.
C1 [Preston, Daniel N.; Brown, Geoffrey W.; Sandstrom, Mary M.; Pollard, Colin J.] Los Alamos Natl Lab, Los Alamos, NM USA.
[Warner, Kirstin F.; Remmers, Daniel L.] Naval Surface Warfare Ctr, Indian Head Div, Indian Head, MD USA.
[Phillips, Jason J.] Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
[Shelley, Timothy J.] Bur Alcohol Tobacco Firearms & Explos, Redstone Arsenal, AL USA.
[Reyes, Jose A.] Appl Res Associates AFRL, Tyndall AFB, FL USA.
[Hsu, Peter C.; Reynolds, John G.] Lawrence Livermore Natl Lab, Livermore, CA USA.
RP Reynolds, JG (reprint author), Lawrence Livermore Natl Lab, Livermore, CA USA.
EM reynolds3@llnl.gov
FU Los Alamos National Laboratory; Lawrence Livermore National Laboratory;
Sandia National Laboratories; Air Force Research Laboratory; Indian Head
Division; Naval Surface Warfare under of the U.S. Department of Homeland
Security, Science and Technology Directorate, Explosives Division; Los
Alamos National Security, LLC, for the U.S. Department of Energy
[DE-AC52-06NA25396]; Sandia Corporation, a Lockheed Martin Company, for
the U.S. Department of Energy's National Nuclear Security Administration
[DE-AC04-94AL85000]; U.S. Department of Energy by Lawrence Livermore
National Laboratory [DE-AC52-07NA27344]; Air Force Research Laboratory
and Indian Head Division, Naval Surface Warfare [HSHQDC10X00414.
LLNL-JRNL-669221 (791018)]
FX The authors thank Doug Bauer, Laura J. Parker and Greg Struba for their
enthusiastic support. This work was performed by the Integrated Data
Collection Analysis (IDCA) Program, a five-lab effort supported by Los
Alamos National Laboratory, Lawrence Livermore National Laboratory,
Sandia National Laboratories, the Air Force Research Laboratory, and
Indian Head Division, Naval Surface Warfare under sponsorship of the
U.S. Department of Homeland Security, Science and Technology
Directorate, Explosives Division. Los Alamos National Laboratory is
operated by Los Alamos National Security, LLC, for the U.S. Department
of Energy under Contract DE-AC52-06NA25396. Sandia is a multi-program
laboratory operated by Sandia Corporation, a Lockheed Martin Company,
for the U.S. Department of Energy's National Nuclear Security
Administration under Contract DE-AC04-94AL85000. This work was performed
under the auspices of the U.S. Department of Energy by Lawrence
Livermore National Laboratory under Contract DE-AC52-07NA27344. The Air
Force Research Laboratory and Indian Head Division, Naval Surface
Warfare also performed work in support of this effort under contract
HSHQDC10X00414. LLNL-JRNL-669221 (791018).
NR 11
TC 1
Z9 1
U1 4
U2 8
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA POSTFACH 101161, 69451 WEINHEIM, GERMANY
SN 0721-3115
EI 1521-4087
J9 PROPELL EXPLOS PYROT
JI Propellants Explos. Pyrotech.
PD FEB
PY 2016
VL 41
IS 1
BP 9
EP 13
DI 10.1002/prep.201500124
PG 5
WC Chemistry, Applied; Engineering, Chemical
SC Chemistry; Engineering
GA DE0RZ
UT WOS:000370333300002
ER
PT J
AU Sandstrom, MM
Brown, GW
Warner, KF
Sorensen, DN
Phillips, JJ
Shelley, TJ
Reyes, JA
Hsu, PC
Reynolds, JG
AF Sandstrom, Mary M.
Brown, Geoffrey W.
Warner, Kirstin F.
Sorensen, Daniel N.
Phillips, Jason J.
Shelley, Timothy J.
Reyes, Jose A.
Hsu, Peter C.
Reynolds, John G.
TI Small-Scale Thermal Studies of Volatile Homemade Explosives
SO PROPELLANTS EXPLOSIVES PYROTECHNICS
LA English
DT Article
DE Small-scale safety testing; Thermal screening; Differential scanning
calorimetry; Homemade explosives; HME; Round-robin test; Proficiency
test
ID AMMONIUM-NITRATE; POTASSIUM PERCHLORATE; STABILITY; DSC
AB Several homemade or improvised explosive mixtures that either contained volatile components or produced volatile products were examined using standard small-scale safety and thermal (SSST) testing that employed differential scanning calorimetry (DSC) techniques (constant heating rate and standard sample holders). KClO3 and KClO4 mixtures with dodecane exhibited different enthalpy behavior when using a vented sample holder in contrast to a sealed sample holder. The standard configuration produced profiles that exhibited only endothermic transitions. The sealed system produced profiles that exhibited additional exothermic transitions absent in the standard configuration produced profiles. When H2O2/fuel mixtures were examined, the volatilization of the peroxide (endothermic) dominated the profiles. When a sealed sample holder was used, the energetic releases of the mixture could be clearly observed. For AN and AN mixtures, the high temperature decomposition appears as an intense endothermic event. Using a nominally sealed sample holder also did not adequately contain the system. Only when a high-pressure rated sample holder was used the high temperature decomposition of the AN could be detected as an exothermic release. The testing was conducted during a proficiency (or round-robin type) test that included three U.S. Department of Energy and two U.S. Department of Defense laboratories. In the course of this proficiency test, certain HMEs exhibited thermal behavior that was not adequately accounted for by standard techniques. Further examination of this atypical behavior highlighted issues that may have not been recognized previously because some of these materials are not routinely tested. More importantly, if not recognized, the SSST testing results could lead to inaccurate safety assessments. This study provides examples, where standard techniques can be applied, and results can be obtained, but these results may be misleading in establishing thermal properties.
C1 [Sandstrom, Mary M.; Brown, Geoffrey W.] Los Alamos Natl Lab, Los Alamos, NM USA.
[Warner, Kirstin F.; Sorensen, Daniel N.] Naval Surface Warfare Ctr, Indian Head Div, Indian Head, MD USA.
[Phillips, Jason J.] Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
[Shelley, Timothy J.] Bur Alcohol Tobacco Firearms & Explos, Redstone Arsenal, AL USA.
[Reyes, Jose A.] Appl Res Associates, Tyndall AFB, FL USA.
[Hsu, Peter C.; Reynolds, John G.] Lawrence Livermore Natl Lab, Livermore, CA USA.
RP Reynolds, JG (reprint author), Lawrence Livermore Natl Lab, Livermore, CA USA.
EM reynolds3@llnl.gov
FU Los Alamos National Laboratory; Lawrence Livermore National Laboratory;
Sandia National Laboratories; Air Force Research Laboratory; Indian Head
Division, Naval Surface Warfare under sponsorship of the U.S. Department
of Homeland Security, Science and Technology Directorate, Explosives
Division; Los Alamos National Security, LLC, for the U.S. Department of
Energy [DE-AC52-06NA25396]; Sandia Corporation, a Lockheed Martin
Company, for the U.S. Department of Energy's National Nuclear Security
Administration [DE-AC04-94AL85000]; U.S. Department of Energy by
Lawrence Livermore National Laboratory [DE-AC52-07NA27344]; Air Force
Research Laboratory and Indian Head Division, Naval Surface Warfare
[HSHQDC10X00414. LLNL-JRNL-669352 (791244)]
FX The authors thank Doug Bauer, Laura J. Parker, and Greg Struba for their
enthusiastic support. This work was performed by the Integrated Data
Collection Analysis (IDCA) Program, a five-lab effort supported by Los
Alamos National Laboratory, Lawrence Livermore National Laboratory,
Sandia National Laboratories, the Air Force Research Laboratory, and
Indian Head Division, Naval Surface Warfare under sponsorship of the
U.S. Department of Homeland Security, Science and Technology
Directorate, Explosives Division. Los Alamos National Laboratory is
operated by Los Alamos National Security, LLC, for the U.S. Department
of Energy under Contract DE-AC52-06NA25396. Sandia is a multi-program
laboratory operated by Sandia Corporation, a Lockheed Martin Company,
for the U.S. Department of Energy's National Nuclear Security
Administration under Contract DE-AC04-94AL85000. This work was performed
under the auspices of the U.S. Department of Energy by Lawrence
Livermore National Laboratory under Contract DE-AC52-07NA27344. The Air
Force Research Laboratory and Indian Head Division, Naval Surface
Warfare also performed work in support of this effort under contract
HSHQDC10X00414. LLNL-JRNL-669352 (791244).
NR 23
TC 0
Z9 0
U1 3
U2 11
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA POSTFACH 101161, 69451 WEINHEIM, GERMANY
SN 0721-3115
EI 1521-4087
J9 PROPELL EXPLOS PYROT
JI Propellants Explos. Pyrotech.
PD FEB
PY 2016
VL 41
IS 1
BP 14
EP 19
DI 10.1002/prep.201500210
PG 6
WC Chemistry, Applied; Engineering, Chemical
SC Chemistry; Engineering
GA DE0RZ
UT WOS:000370333300003
ER
PT J
AU Rando, J
Szari, S
Kumar, G
Lingadevaru, H
AF Rando, Jessica
Szari, Sofia
Kumar, Gogi
Lingadevaru, Hemanth
TI Methadone overdose causing acute cerebellitis and multi-organ damage
SO AMERICAN JOURNAL OF EMERGENCY MEDICINE
LA English
DT Article
ID ENCEPHALOPATHY
AB Methadone is a synthetic opioid that, when taken in supratherapeutic amounts or with accidental ingestion in children, has shown to have adverse effects, especially to the cerebellum [1-5]. Our patientwas a 14-year-old male adolescent with no significant past medical history, who presented after being found unresponsive at a friend's house. Laboratory and imaging investigation revealed acute cardiac damage, acute renal injury, acute liver damage, and cerebellitis. Later, through specialized testing, it was discovered that patient had high levels of methadone in his serum. Many patients present to the emergency department with altered mental status or unresponsiveness. One etiology to consider should be methadone overdose, especially in patients with access to such medication. Methadone overdose has been known to cause cerebellitis when taken in supratherapeutic amounts [1-5]. It is important to consider this when a patient presents with unresponsiveness if they have had methadone available to them as it requires specialized testing and does not result on standard urine drug screens. Furthermore, prompt management is very critical and may help prevent and decrease long term morbidity and mortality in such patients.
C1 [Rando, Jessica] Wright State Univ, 3640 Colonel Glenn Hwy, Dayton, OH 45435 USA.
[Szari, Sofia; Kumar, Gogi; Lingadevaru, Hemanth] Dayton Childrens Hosp, 1 Childrens Plz, Dayton, OH USA.
[Szari, Sofia] US Air Force, 1 Wright Patterson Afb A271, Dayton, OH USA.
RP Rando, J (reprint author), 3525 Southern Blvd, Kettering, OH 45429 USA.
EM Jessica.rando718@gmail.com; sofia.szari@gmail.com;
kumarg@childrensdayton.org; lingadevaruh@childrensdayton.org
NR 5
TC 0
Z9 0
U1 1
U2 2
PU W B SAUNDERS CO-ELSEVIER INC
PI PHILADELPHIA
PA 1600 JOHN F KENNEDY BOULEVARD, STE 1800, PHILADELPHIA, PA 19103-2899 USA
SN 0735-6757
EI 1532-8171
J9 AM J EMERG MED
JI Am. J. Emerg. Med.
PD FEB
PY 2016
VL 34
IS 2
AR 343.e1
DI 10.1016/j.ajem.2015.06.032
PG 3
WC Emergency Medicine
SC Emergency Medicine
GA DD1SE
UT WOS:000369701200074
PM 26164407
ER
PT J
AU Boakye, EE
Mogilevsky, P
Parthasarathy, TA
Keller, KA
Hay, RS
Cinibulk, MK
AF Boakye, Emmanuel E.
Mogilevsky, Pavel
Parthasarathy, Triplicane A.
Keller, Kristin A.
Hay, Randall S.
Cinibulk, Michael K.
TI Processing and Testing of RE2Si2O7 Fiber-Matrix Interphases for SiC-SiC
Composites
SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY
LA English
DT Article
ID HIGH-TEMPERATURE STABILITY; MONAZITE MONOCLINIC LAPO4; GLASS-CERAMIC
COMPOSITES; SILICON-CARBIDE; YTTRIUM DISILICATE; PUSH-OUT;
TRANSFORMATION PLASTICITY; OXIDE/OXIDE COMPOSITES; INTERFACIAL
ROUGHNESS; MECHANICAL-PROPERTIES
AB Rare-earth disilicates (RE2Si2O7) are investigated for use as oxidation-resistant alternatives to carbon or BN fiber-matrix interphases in ceramic matrix composites (CMC). Dense , , -Y2Si2O7, and -Ho2Si2O7 pellets were formed at 64MPa and 1050 degrees C-1200 degrees C for 1h using the field-assisted sintering technique (FAST). Pellet modulus was measured using nanoindentation, and Vickers hardness was measured at loads of 100, 500, and 1000g. The sliding stress of SCS-0 SiC fibers incorporated in -, -, and -RE2Si2O7 matrices were measured by fiber push-out. Deformation of RE2Si2O7 after indentation and after fiber push-out was characterized by TEM. Implications of the results for use of RE2Si2O7 as a fiber-matrix interphase in CMCs are discussed.
C1 [Boakye, Emmanuel E.; Mogilevsky, Pavel; Parthasarathy, Triplicane A.; Keller, Kristin A.; Hay, Randall S.; Cinibulk, Michael K.] US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH USA.
[Boakye, Emmanuel E.; Mogilevsky, Pavel; Parthasarathy, Triplicane A.; Keller, Kristin A.] UES Inc, Dayton, OH USA.
RP Boakye, EE (reprint author), US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH USA.; Boakye, EE (reprint author), UES Inc, Dayton, OH USA.
EM emmanuel.boakye@wpafb.af.mil
FU AF [FA8650-10-D-5226]
FX This work was completed under AF Contract #FA8650-10-D-5226.
NR 71
TC 2
Z9 2
U1 9
U2 32
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0002-7820
EI 1551-2916
J9 J AM CERAM SOC
JI J. Am. Ceram. Soc.
PD FEB
PY 2016
VL 99
IS 2
BP 415
EP 423
DI 10.1111/jace.13935
PG 9
WC Materials Science, Ceramics
SC Materials Science
GA DD3QC
UT WOS:000369836600009
ER
PT J
AU Johnson, L
Shipherd, J
Walton, HM
AF Johnson, Laura
Shipherd, Jillian
Walton, Heather M.
TI The Psychologist's Role in Transgender-Specific Care With US Veterans
SO PSYCHOLOGICAL SERVICES
LA English
DT Article
DE transgender; veteran; military; psychology; LOGT
ID MINORITY VETERANS; MENTAL-HEALTH; PROVIDERS; STRESS
AB Psychologists are integral to the care of transgender individuals. This article details the many roles for psychologists in transgender-specific care, including diagnosing and treating gender dysphoria; providing treatment for comorbid conditions; referring to medical services such as gender confirmation surgeries, voice modification, and cross-sex hormone therapies; serving as consultants within health care systems; and advocating for addressing harriers in systems in which transgender individuals live and work. Transgender veterans have unique experiences and vulnerabilities related to their military service that are detailed from a review of the literature, and we make the case that Veterans Health Administration (VITA) and community psychologists are well-positioned to provide care to transgender veterans (trans-vets). In this article, the authors describe the experiences that many trans-vets have faced, identify the importance of treatment for gender dysphoria (and draw the distinction between gender identity disorder and gender dysphoria) as well as psychologists' roles, and clarify which transgender-related services are available to eligible veterans though VHA per policy and how VHA providers have access to training to provide that care. In addition, we describe how veterans can connect to the VITA, even if they have (and want to continue working with) non-VITA psychologists or other community providers.
C1 [Johnson, Laura] Edith Nourse Rogers Mem Vet Hosp, Psychol Serv, Bedford, MA USA.
[Shipherd, Jillian] Natl Ctr PTSD, Womens Hlth Sci Div, Boston, MA USA.
[Shipherd, Jillian] Vet Affairs Boston Healthcare Syst, Boston, MA USA.
[Shipherd, Jillian] Boston Univ, Sch Med, Boston, MA 02118 USA.
[Shipherd, Jillian] Vet Affairs Cent Off, Patient Care Serv, Washington, DC USA.
[Walton, Heather M.] Vet Affairs Boston Healthcare Syst, Psychol Serv, Brockton, MA USA.
[Walton, Heather M.] Harvard Univ, Sch Med, Dept Psychiat, Cambridge, MA 02138 USA.
RP Johnson, L (reprint author), USAF, 60 MDOS SGOW, Fairfield, CA 94535 USA.
EM laura.johnson9@va.gov
FU Department of Veterans Affairs, Veterans Health Administration
FX The views expressed in this article are those of the authors and do not
necessarily reflect the position or policy of the Department of Veterans
Affairs, U.S. Air Force, Department of Defense, or the U.S. government.
This material is based on work supported by the Department of Veterans
Affairs, Veterans Health Administration.
NR 36
TC 5
Z9 5
U1 3
U2 6
PU AMER PSYCHOLOGICAL ASSOC
PI WASHINGTON
PA 750 FIRST ST NE, WASHINGTON, DC 20002-4242 USA
SN 1541-1559
EI 1939-148X
J9 PSYCHOL SERV
JI Psychol. Serv.
PD FEB
PY 2016
VL 13
IS 1
BP 69
EP 76
DI 10.1037/ser0000030
PG 8
WC Psychology, Clinical
SC Psychology
GA DD0FJ
UT WOS:000369595500010
PM 25961643
ER
PT J
AU Gordon, MC
McKenna, DS
Stewart, TL
Howard, BC
Foster, KF
Higby, K
Cypher, RL
Barth, WH
AF Gordon, Michael C.
McKenna, David S.
Stewart, Theresa L.
Howard, Bobby C.
Foster, Kimberly F.
Higby, Kenneth
Cypher, Rebecca L.
Barth, William H.
TI Transvaginal cervical length scans to prevent prematurity in twins: a
randomized controlled trial
SO AMERICAN JOURNAL OF OBSTETRICS AND GYNECOLOGY
LA English
DT Article
DE prematurity prevention; transvaginal cervical length; twins
ID PRETERM BIRTH; GESTATIONS; PREDICTION; ULTRASONOGRAPHY; PROGESTERONE;
METAANALYSIS; PREGNANCIES; CERCLAGE; WOMEN; RISK
AB BACKGROUND: Twin pregnancies are associated with an increased risk of perinatal morbidity and mortality primarily due to spontaneous preterm deliveries. The mean gestational age for delivery is 35.3 weeks and twins account for 23% of preterm births < 32 weeks. A number of strategies have been proposed to prevent preterm deliveries: tocolytics, bed rest, hospitalization, home uterine activity monitoring, cerclage, and most recently, progesterone. Unfortunately, none have proven effective. Recent metaanalyses and reviews suggest that transvaginal cervical length (TVCL) ultrasound in the second trimester is a powerful predictor of preterm birth among asymptomatic women. Indeed, TVCL has the highest positive and negative predictive values for determining the risk of spontaneous preterm delivery in twin pregnancies. It follows that TVCL assessment may allow identification of a subset of twin pregnancies that re better candidates for interventions intended to prevent prematurity.
OBJECTIVE: We sought to determine whether use of TVCL prolongs gestation in twin pregnancies.
STUDY DESIGN: This is a multicenter, randomized, controlled trial of 125 dichorionic or monochorionic/diamniotic twin pregnancies without prior preterm birth < 28 weeks. The study group (n = 63) had TVCL and digital exams monthly from 16-28 weeks and were managed with a standard algorithm for activity restriction and cerclage. The control group (n = 62) had monthly digital cervical examinations but no routine TVCL ultrasound examinations. The primary outcome was gestational age at delivery. Secondary outcomes included percentage of deliveries < 35 weeks, and maternal and neonatal outcomes.
RESULTS: The mean gestational age at delivery was 35.7 weeks (95% confidence interval [CI], 35.2-36.2) among those managed with TVCL and 35.5 weeks (95% CI, 34.7-36.4) among the control patients. The Kaplan-Meier estimates of deliveries < 38 weeks were not significantly different between groups. This was true whether we compared curves with a log-rank test (P =.67), Breslow test (P =.67), or Tarone-Ware test (P =.64). The percentage of deliveries < 35 0/7 weeks did not differ: 27.4% for subjects managed with routine TVCL and 28.6% for control subjects (relative risk, 0.96; 95% CI, 0.60-1.54). Our study had an 80% power to detect a 12-day difference in the gestational age at delivery with 95% confidence.
CONCLUSION: The overall mean length of gestation and the percentage of women delivering < 35 weeks did not differ between twin gestations managed with TVCL and digital exams monthly from 16-28 weeks with a standard algorithm for activity restriction and cerclage and controls who had monthly digital cervical examinations but no routine TVCL. Routine second-trimester transvaginal ultrasound assessment of cervical length is not associated with improved outcomes when incorporated into the standard management of otherwise low-risk twin pregnancies.
C1 [Gordon, Michael C.; Stewart, Theresa L.; Cypher, Rebecca L.; Barth, William H.] Wilford Hall USAF Med Ctr, Dept Obstet & Gynecol, Lackland AFB, TX USA.
[McKenna, David S.; Foster, Kimberly F.] Wright Patterson Med Ctr, Dept Obstet & Gynecol, Wright Patterson AFB, OH USA.
[McKenna, David S.] Wright State Univ, Dayton, OH 45435 USA.
[Howard, Bobby C.] Madigan Army Med Ctr, Dept Obstet & Gynecol, Tacoma, WA 98431 USA.
[Howard, Bobby C.] Univ Tennessee, Med Ctr, Dept Obstet & Gynecol, Knoxville, TN USA.
[Higby, Kenneth] Ctr Maternal Fetal Care, San Antonio, TX USA.
[Barth, William H.] Harvard Univ, Massachusetts Gen Hosp, Sch Med, Dept Obstet & Gynecol,Div Maternal Fetal Med, Boston, MA USA.
RP Gordon, MC (reprint author), Wilford Hall USAF Med Ctr, Dept Obstet & Gynecol, Lackland AFB, TX USA.
EM packergord@aol.com
NR 18
TC 3
Z9 3
U1 1
U2 5
PU MOSBY-ELSEVIER
PI NEW YORK
PA 360 PARK AVENUE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0002-9378
EI 1097-6868
J9 AM J OBSTET GYNECOL
JI Am. J. Obstet. Gynecol.
PD FEB
PY 2016
VL 214
IS 2
AR 277.e1-e7
DI 10.1016/j.ajog.2015.08.065
PG 7
WC Obstetrics & Gynecology
SC Obstetrics & Gynecology
GA DC9CJ
UT WOS:000369518200026
PM 26363481
ER
PT J
AU Paine, BM
Rust, T
Moore, EA
AF Paine, Bruce M.
Rust, Thomas, III
Moore, Elizabeth A.
TI Measurement of Temperature in GaN HEMTs by Gate End-to-End Resistance
SO IEEE TRANSACTIONS ON ELECTRON DEVICES
LA English
DT Article
DE Characterization; finite-difference model; GaN; gate metal thermometry;
HEMT; Raman spectrometry; simulation; temperature measurement; thermal
resistance
ID THERMAL-BOUNDARY RESISTANCE; RAMAN-SCATTERING; ALGAN/GAN HEMTS;
SUBSTRATE; DEVICES; FILMS; BIAS
AB We have used the gate end-to-end (GEE) resistance method to measure channel temperatures in GaN HEMTs. This method is appealing for its simplicity and sensitivity to temperature immediately adjacent to the base of the gate, where several important degradation mechanisms occur. This region is not normally accessible with optical measurement techniques, due to shadowing by the gate and field plate overhangs; yet, it is considerably hotter than the regions that can be reached with optics. We found agreement with a finite-difference model, with reasonable inputs for the thermal barrier resistance at the SiC-GaN interface and temperature coefficients. We repeated this successfully for a second GaN HEMT technology with a very different gate geometry. Finally, we conducted micro-Raman measurements on FETs from the first technology and found excellent agreement with the GEE measurement, once it had been adapted to the more-distant location of the micro-Raman laser spot, by means of our finite-difference model. We conclude that GEE is a valuable tool, complementary to micro-Raman, for calibrating thermal models.
C1 [Paine, Bruce M.] Boeing Network & Space Syst, Technol Qualificat Grp, El Segundo, CA 90045 USA.
[Rust, Thomas, III] Boeing Network & Space Syst, Thermal Engn & Prod, El Segundo, CA 90045 USA.
[Moore, Elizabeth A.] Air Force Res Lab, Wyle Labs, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Paine, BM (reprint author), Boeing Network & Space Syst, Technol Qualificat Grp, El Segundo, CA 90045 USA.; Rust, T (reprint author), Boeing Network & Space Syst, Thermal Engn & Prod, El Segundo, CA 90045 USA.; Moore, EA (reprint author), Air Force Res Lab, Wyle Labs, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM bruce.paine@boeing.com; thomas.rust-iii@boeing.com;
elizabeth.moore.ctr@wpafb.af.mil
OI Paine, Bruce/0000-0002-9419-7371
FU Technology Investigation Agreement between Air Force Research Laboratory
[FA8650-11-2-1187]; Boeing Network and Space Systems Internal Research
and Development Program
FX This work was supported in part by the Technology Investigation
Agreement between Air Force Research Laboratory (Lois Kehias) under
Grant FA8650-11-2-1187 and in part by the Boeing Network and Space
Systems Internal Research and Development Program (Remy Hiramoto). The
review of this paper was arranged by Editor K. J. Chen.
NR 23
TC 3
Z9 3
U1 5
U2 25
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9383
EI 1557-9646
J9 IEEE T ELECTRON DEV
JI IEEE Trans. Electron Devices
PD FEB
PY 2016
VL 63
IS 2
BP 590
EP 597
DI 10.1109/TED.2015.2510610
PG 8
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA DC6BM
UT WOS:000369304700010
ER
PT J
AU Wurden, GA
Hsu, SC
Intrator, TP
Grabowski, TC
Degnan, JH
Domonkos, M
Turchi, PJ
Campbell, EM
Sinars, DB
Herrmann, MC
Betti, R
Bauer, BS
Lindemuth, IR
Siemon, RE
Miller, RL
Laberge, M
Delage, M
AF Wurden, G. A.
Hsu, S. C.
Intrator, T. P.
Grabowski, T. C.
Degnan, J. H.
Domonkos, M.
Turchi, P. J.
Campbell, E. M.
Sinars, D. B.
Herrmann, M. C.
Betti, R.
Bauer, B. S.
Lindemuth, I. R.
Siemon, R. E.
Miller, R. L.
Laberge, M.
Delage, M.
TI Magneto-Inertial Fusion
SO JOURNAL OF FUSION ENERGY
LA English
DT Article
DE Magneto-inertial fusion; Magnetized target fusion; Liner; Plasma jets;
Fusion energy; MagLIF
ID FIELD-REVERSED CONFIGURATION; TARGET FUSION; PARAMETER SPACE; PLASMA;
COMPRESSION
AB In this community white paper, we describe an approach to achieving fusion which employs a hybrid of elements from the traditional magnetic and inertial fusion concepts, called magneto-inertial fusion (MIF). The status of MIF research in North America at multiple institutions is summarized including recent progress, research opportunities, and future plans.
C1 [Wurden, G. A.; Hsu, S. C.; Intrator, T. P.] Los Alamos Natl Lab, Los Alamos, NM USA.
[Grabowski, T. C.; Degnan, J. H.; Domonkos, M.] Air Force Res Lab, Albuquerque, NM USA.
[Campbell, E. M.; Sinars, D. B.] Sandia Natl Labs, Albuquerque, NM USA.
[Herrmann, M. C.] Lawrence Livermore Natl Lab, Livermore, CA USA.
[Betti, R.] Univ Rochester, Rochester, NY USA.
[Bauer, B. S.; Lindemuth, I. R.; Siemon, R. E.] Univ Nevada, Reno, NV 89557 USA.
[Miller, R. L.] Decys Syst, Santa Fe, NM USA.
[Laberge, M.; Delage, M.] Gen Fus, Vancouver, BC, Canada.
RP Wurden, GA (reprint author), Los Alamos Natl Lab, Los Alamos, NM USA.
EM wurden@lanl.gov
RI Wurden, Glen/A-1921-2017;
OI Wurden, Glen/0000-0003-2991-1484; Hsu, Scott/0000-0002-6737-4934
NR 43
TC 3
Z9 4
U1 12
U2 17
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0164-0313
EI 1572-9591
J9 J FUSION ENERG
JI J. Fusion Energy
PD FEB
PY 2016
VL 35
IS 1
BP 69
EP 77
DI 10.1007/s10894-015-0038-x
PG 9
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA DC9MX
UT WOS:000369546800009
ER
PT J
AU Bova, MJ
Ciarallo, FW
Hill, RR
AF Bova, M. J.
Ciarallo, F. W.
Hill, R. R.
TI Development of an agent-based model for the secondary threat resulting
from a ballistic impact event
SO JOURNAL OF SIMULATION
LA English
DT Article
DE defence studies; agent-based modelling; ballistic impacts; survivability
ID FRAGMENTATION; PLATES; PROJECTILES; DEBRIS
AB Military aircraft must often operate in hostile environments. A worrisome threat to aircraft are the high velocity fragments emanating from missile detonations near the aircraft. These fragments may impact and penetrate the aircraft, causing fires in the aircraft. The process by which a high-velocity impact event leads to fire ignition onboard military vehicles is complex, influenced by the interaction of heated debris fragments and fuel spurting from ruptured tanks. An assessment of the risk of such a fire begins with a complete characterization of the secondary threat resulting from the impact, including debris fragment sizes, states of motion, and thermal properties. In the aircraft survivability community, there is a need for an analytical tool to model this complete threat. This paper approaches the problem by describing an agent-based simulation model of the fragments in a debris cloud. An analytical/empirical impact fragmentation model is developed for incorporation into the simulation model, which determines fragment sizes and states of motion. Development and study of this proof-of-concept effort leads to a deeper understanding of such secondary threats and demonstrates the value of agent-based simulation models as an analytical tool. Empirical assessment of model results indicates the viability of the approach.
C1 [Bova, M. J.] Univ Cincinnati, Cincinnati, OH USA.
[Ciarallo, F. W.] Wright State Univ, Dayton, OH 45435 USA.
[Hill, R. R.] US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Hill, RR (reprint author), US Air Force, Inst Technol, Dept Operat Sci, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM rayrhill@gmail.com
FU Southwestern Council for Higher Education (SOCHE); Oak Ridge Institute
for Science and Education (ORISE); Science of Test Research Consortium
within the Air Force Institute of Technology, Center for Operational
Analyses
FX Matthew Bova was supported by the Southwestern Council for Higher
Education (SOCHE) and Dr Frank Ciarallo by the Oak Ridge Institute for
Science and Education (ORISE). The research was funded under the Science
of Test Research Consortium within the Air Force Institute of
Technology, Center for Operational Analyses. The authors would like to
thank Mr Scott Wacker and the US Air Force Aerospace Survivability and
Safety Operating Location (96 TG/OL-AC) at Wright Patterson Air Force
Base for providing the experimental data used in model development and
the required subject matter expertise.
NR 24
TC 1
Z9 1
U1 2
U2 6
PU PALGRAVE MACMILLAN LTD
PI BASINGSTOKE
PA BRUNEL RD BLDG, HOUNDMILLS, BASINGSTOKE RG21 6XS, HANTS, ENGLAND
SN 1747-7778
EI 1747-7786
J9 J SIMUL
JI J. Simul.
PD FEB
PY 2016
VL 10
IS 1
BP 24
EP 35
DI 10.1057/jos.2015.1
PG 12
WC Computer Science, Interdisciplinary Applications; Operations Research &
Management Science
SC Computer Science; Operations Research & Management Science
GA DC4NV
UT WOS:000369198500004
ER
PT J
AU Zelmon, DE
Erdman, EC
Stevens, KT
Foundos, G
Kim, JR
Brady, A
AF Zelmon, David E.
Erdman, Emily C.
Stevens, Kevin T.
Foundos, Greg
Kim, Joo Ro
Brady, Allen
TI Optical properties of lithium terbium fluoride and implications for
performance in high power lasers
SO APPLIED OPTICS
LA English
DT Article
ID FARADAY ISOLATORS; TEMPERATURE; WAVELENGTH; CRYSTALS
AB LiTbF4 has the potential to replace traditional magneto-optic garnet materials as a Faraday rotator in high power laser systems due to its high Verdet constant. New measurements are reported of the ordinary and extraordinary refractive indices of LiTbF4 as functions of wavelength and temperature, respectively, as well as their corresponding Sellmeier expressions. Consequently, the Verdet coefficient was calculated and plotted as a function of wavelength and temperature. These measurements will aid in further development of LiTbF4 as an optical isolator. (C) 2016 Optical Society of America
C1 [Zelmon, David E.; Erdman, Emily C.] AFRL RXAP, Mat & Mfg Directorate, 3005 Hobson Way, Wright Patterson AFB, OH 45433 USA.
[Stevens, Kevin T.; Foundos, Greg; Kim, Joo Ro; Brady, Allen] Northrop Grumman Synopt, 1201 Continental Blvd, Charlotte, NC 28273 USA.
RP Zelmon, DE (reprint author), AFRL RXAP, Mat & Mfg Directorate, 3005 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM david.zelmon@us.af.mil
NR 14
TC 1
Z9 1
U1 4
U2 11
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1559-128X
EI 2155-3165
J9 APPL OPTICS
JI Appl. Optics
PD FEB 1
PY 2016
VL 55
IS 4
BP 834
EP 837
DI 10.1364/AO.55.000834
PG 4
WC Optics
SC Optics
GA DC2PN
UT WOS:000369058700027
PM 26836088
ER
PT J
AU Camden, A
Phillips, C
McKinley, RA
Kender, D
Nelson, J
AF Camden, Aerial
Phillips, Chandler
McKinley, R. Andy
Kender, David
Nelson, Justin
TI Strategy Shifting With Multisensorial Cueing: Theoretical Capability of
Multitasking Throughput
SO IEEE TRANSACTIONS ON HUMAN-MACHINE SYSTEMS
LA English
DT Article
DE Auditory cueing; haptic cueing; information theory; throughput capacity;
multitasking
ID PERFORMANCE; INFORMATION; DISPLAYS; CAPACITY; NUMBER; TASK
AB Human multitasking performance is important in many areas, such as defense, medicine, and everyday life. However, multitasking can be difficult to research due to a lack of objective metrics. This gap is remedied by applying information theory-basedmodels to multitasking systems. The human operator informatic model is a throughput model that has been successfully applied to the multiple attribute task battery(MATB) software. In this study, auditory and haptic cueing were applied to the monitoring and targeting components of MATB, respectively. Interestingly, overall information throughput was not significantly affected by the cueing. These results can be traced to a mathematical change in operator strategy. In the presence of multisensory cueing, operators responded at higher information rates to the monitoring and targeting components; however, this came at a proportional cost to the communications and resource components. We propose that each operator has an information throughput capacity-an asymptotic limit to the amount of information he/she can process. This theoretical limit is analogous to the "channel capacity" for single tasking proposed by Miller in 1956.
C1 [Camden, Aerial; Phillips, Chandler; Kender, David] Wright State Univ, Dept Biomed Ind & Human Factors Engn, Dayton, OH 45435 USA.
[McKinley, R. Andy; Nelson, Justin] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Camden, A (reprint author), Wright State Univ, Dept Biomed Ind & Human Factors Engn, Dayton, OH 45435 USA.
EM camden.5@wright.edu; chandler.phillips@wright.edu;
richard.mckinley.2@us.af.mil; david.kender@wright.edu;
justin.nelson.15.ctr@us.af.mil
NR 35
TC 2
Z9 2
U1 2
U2 3
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 2168-2291
EI 2168-2305
J9 IEEE T HUM-MACH SYST
JI IEEE T. Hum.-Mach. Syst.
PD FEB
PY 2016
VL 46
IS 1
BP 136
EP 142
DI 10.1109/THMS.2015.2470679
PG 7
WC Computer Science, Artificial Intelligence; Computer Science, Cybernetics
SC Computer Science
GA DB9IK
UT WOS:000368829400012
ER
PT J
AU Slagle, JE
Haus, JW
Guha, S
McLean, DG
Krein, DM
Cooper, TM
AF Slagle, Jonathan E.
Haus, Joseph W.
Guha, Shekhar
McLean, Daniel G.
Krein, Douglas M.
Cooper, Thomas M.
TI Degenerate frequency two-beam coupling in organic media via phase
modulation with nanosecond pulses
SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
LA English
DT Article
ID NONLINEAR REFRACTION; ENERGY-TRANSFER; KERR MEDIA; ABSORPTION;
CHROMOPHORES; MODEL; BEAM
AB This work presents a theoretical treatment using population redistribution and the thermo-optic effect to mediate degenerate frequency two-beam coupling (TBC) in the nanosecond regime in third-order nonlinear organic solutions. We show experimentally that the energy transfer is indeed a result of TBC and can be modeled using self-and cross-phase modulation to produce the required frequency shift. As a result of the relatively long lifetimes and large phase shifts induced by population redistribution and thermo-optic effects, the coupling efficiency can be significant. For the special case when a single input beam is aligned to overlap with the Fresnel reflection of the sample/air interface, coupling efficiencies can easily exceed 50% of the incident pump energy, which can account for a severe deleterious effect in nonlinear transmission experimentation. (C) 2016 Optical Society of America
C1 [Slagle, Jonathan E.; Guha, Shekhar; McLean, Daniel G.; Krein, Douglas M.; Cooper, Thomas M.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Slagle, Jonathan E.; McLean, Daniel G.] Leidos Inc, Beavercreek, OH 45431 USA.
[Haus, Joseph W.] Univ Dayton, Electroopt Program, Dayton, OH 45469 USA.
[Krein, Douglas M.] Gen Dynam Informat Technol, Dayton, OH 45431 USA.
RP Slagle, JE (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.; Slagle, JE (reprint author), Leidos Inc, Beavercreek, OH 45431 USA.
EM jonathan.slagle.1.ctr@us.af.mil
NR 23
TC 2
Z9 2
U1 1
U2 3
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0740-3224
EI 1520-8540
J9 J OPT SOC AM B
JI J. Opt. Soc. Am. B-Opt. Phys.
PD FEB 1
PY 2016
VL 33
IS 2
BP 180
EP 188
DI 10.1364/JOSAB.33.000180
PG 9
WC Optics
SC Optics
GA DC3DK
UT WOS:000369099300020
ER
PT J
AU Wong, PH
Adams, KE
Carlson, GS
Quinn, JM
AF Wong, Priscilla H.
Adams, Karla E.
Carlson, Geoffrey S.
Quinn, James M.
TI Experience with epinephrine delivery in immunotherapy-associated
systemic reactions
SO ANNALS OF ALLERGY ASTHMA & IMMUNOLOGY
LA English
DT Letter
ID ALLERGEN IMMUNOTHERAPY; ANAPHYLAXIS; ABSORPTION
C1 [Wong, Priscilla H.; Carlson, Geoffrey S.; Quinn, James M.] Wilford Hall Ambulatory Surg Ctr, Lackland AFB, TX USA.
[Adams, Karla E.] Mike OCallaghan Fed Med Ctr, Nellis AFB, NV USA.
RP Wong, PH (reprint author), Wilford Hall Ambulatory Surg Ctr, Lackland AFB, TX USA.
EM priscilla.wong@us.af.mil
NR 10
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 1081-1206
EI 1534-4436
J9 ANN ALLERG ASTHMA IM
JI Ann. Allergy Asthma Immunol.
PD FEB
PY 2016
VL 116
IS 2
BP 166
EP 168
PG 4
WC Allergy; Immunology
SC Allergy; Immunology
GA DB5SD
UT WOS:000368573000017
PM 26712521
ER
PT J
AU Scott-Emuakpor, O
Holycross, C
George, T
Knapp, K
Beck, J
AF Scott-Emuakpor, Onome
Holycross, Casey
George, Tommy
Knapp, Kevin
Beck, Joseph
TI Fatigue and Strength Studies of Titanium 6Al-4V Fabricated by Direct
Metal Laser Sintering
SO JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE
ASME
LA English
DT Article
AB Vibratory bending fatigue behavior of titanium 6Al-4V plate specimens manufactured via direct metal laser sintering (DMLS), powder bed fusion additive manufacturing (AM), is assessed. Motivation for the work is based on unprecedented performance demands for sixth-generation gas turbine engine technology that requires complex, lightweight components. Due to cost, schedule, and feasibility limitations associated with conventional manufacturing, AM aims to address ubiquitous component concepts. Though AM has promise in the engine community, process controls necessary for consistent material properties remain an enigma. The following manuscript compares variability of DMLS fatigue and strength to cold-rolled data. Results show discrepancies between DMLS and cold-rolled for fatigue and microstructure characteristics.
C1 [Scott-Emuakpor, Onome; Holycross, Casey; George, Tommy; Knapp, Kevin] Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
[Beck, Joseph] Percept Engn Analyt, Lino Lakes, MN 55014 USA.
RP Scott-Emuakpor, O (reprint author), Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
EM onome.scott-emuakpor.1@us.af.mil; casey.holycross@us.af.mil;
tommy.george@us.af.mil; kevin.knapp.3@us.af.mil; joe_a_beck@yahoo.com
FU Turbine Engine Fatigue Facility (TEFF) of the United States Air Force
Research Laboratory (AFRL); Universal Technology Corporation (UTC)
FX The authors would like to thank the following organizations for funding,
support, and collaboration: the Turbine Engine Fatigue Facility (TEFF)
of the United States Air Force Research Laboratory (AFRL) and Universal
Technology Corporation (UTC). Also, the authors would like to
acknowledge UTC contractor Sarah Cetnar for contributing to laboratory
testing.
NR 30
TC 0
Z9 0
U1 0
U2 0
PU ASME
PI NEW YORK
PA TWO PARK AVE, NEW YORK, NY 10016-5990 USA
SN 0742-4795
EI 1528-8919
J9 J ENG GAS TURB POWER
JI J. Eng. Gas. Turbines Power-Trans. ASME
PD FEB
PY 2016
VL 138
IS 2
AR 022101
DI 10.1115/1.4031271
PG 7
WC Engineering, Mechanical
SC Engineering
GA EM5UJ
UT WOS:000395378900014
ER
PT J
AU Heimbuch, BK
Wallace, WH
Balzli, CL
Laning, ML
Harnish, DA
Wander, JD
AF Heimbuch, Brian K.
Wallace, William H.
Balzli, Charles L.
Laning, Michelle L.
Harnish, Delbert A.
Wander, Joseph D.
TI Bioaerosol exposure to personnel in a clinical environment absent
patients
SO JOURNAL OF OCCUPATIONAL AND ENVIRONMENTAL HYGIENE
LA English
DT Article
DE Antibiotic resistance; background; hospital; infection; nosocomial; N95
respirator
ID FILTERING FACEPIECE RESPIRATORS; INFECTION; AIR; STAPHYLOCOCCI;
CONTAMINATION; DISPERSAL; BACTERIA; AEROSOLS
AB Nosocomial infections pose a significant and escalating threat to both patients and healthcare workers (HCWs). By their nature, hospitals induce antibiotic resistance in virulent and commensal strains, leading to increasingly severe hospital-acquired infections. This study measured environmental exposure experienced by domestic staff cleaning vacated patient rooms of a community hospital to bacteria in ambient bioaerosols. While they cleaned the room, participants wore an N95 filtering facepiece respirator (FFR), from which coupons were cut and bacteria were extracted, cultured and enumerated. Extrapolation to the full area of the respirator yielded measured exposures of 0.2-1.4 x 10(4) colony-forming units/ hour, of which similar to 97% collected on the front layer of the N95, suggesting a possible role for minimal respiratory protection in nonpatient environments. Random resistance testing of 1.6% of the isolates showed that similar to 70% of both Gram-positive and Gram-negative organisms exhibited resistance to oxacillin and similar to 9% of the Gram-positives displayed resistance to vancomycin. These data provide an estimate formask bioaerosol loading that can be used in risk modeling and to refine strategies for reuse of FFRs during critical shortages.
C1 [Heimbuch, Brian K.; Wallace, William H.; Harnish, Delbert A.] Appl Res Associates, Engn Sci Div, Panama City, FL USA.
[Balzli, Charles L.] Universal Technol Corp, Mat & Mfg Div, Dayton, OH USA.
[Laning, Michelle L.] Air Force Res Lab, Tyndall AFB, FL USA.
[Wander, Joseph D.] Air Force Civil Engineer Ctr, Tyndall AFB, FL USA.
RP Wander, JD (reprint author), Air Force Civil Engineer Ctr Readiness, Tyndall AFB, FL 32403 USA.
EM joseph.wander@us.af.mil
FU FDA, Centers for Devices and Radiologic Health; Air Force Research
Laboratory
FX This work was funded by the FDA, Centers for Devices and Radiologic
Health, through an interagency agreement with the Air Force Research
Laboratory.
NR 26
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Z9 1
U1 5
U2 12
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 530 WALNUT STREET, STE 850, PHILADELPHIA, PA 19106 USA
SN 1545-9624
EI 1545-9632
J9 J OCCUP ENVIRON HYG
JI J. Occup. Environ. Hyg.
PD FEB 1
PY 2016
VL 13
IS 2
BP D11
EP D15
DI 10.1080/15459624.2015.1091966
PG 5
WC Environmental Sciences; Public, Environmental & Occupational Health
SC Environmental Sciences & Ecology; Public, Environmental & Occupational
Health
GA DA3NJ
UT WOS:000367704100001
PM 26375496
ER
PT J
AU Holston, MS
Ferguson, IP
Giles, NC
McClory, JW
Winarski, DJ
Ji, JF
Selim, FA
Halliburton, LE
AF Holston, M. S.
Ferguson, I. P.
Giles, N. C.
McClory, J. W.
Winarski, D. J.
Ji, Jianfeng
Selim, F. A.
Halliburton, L. E.
TI Green luminescence from Cu-diffused LiGaO2 crystals
SO JOURNAL OF LUMINESCENCE
LA English
DT Article
DE LiGaO2 copper; Photoluminescence; Optical absorption;
Thermoluminescence; EPR
ID SPECTROSCOPIC PROPERTIES; LIALO2 CRYSTALS; DEFECTS; GROWTH;
THERMOLUMINESCENCE; IDENTIFICATION; RESONANCE; FILMS; OXIDE; ZNO
AB An intense green luminescence is observed from single crystals of LiGaO2 doped with copper. Czochralskigrown undoped crystals are wrapped in thin copper foil and then held at 900 degrees C for 1 h in a flowing nitrogen atmosphere. Large concentrations of Cu+ ions enter the crystals during this process and occupy Li+ sites. These copper-diffused crystals are characterized with optical absorption, photoluminescence (PL), photoluminescence excitation (PLE), thermoluminescence (TL), and electron paramagnetic resonance (EPR). An optical absorption band peaking near 350 nm is assigned to the Cu+ ions at Li+ sites and represents an excitation from a 3d(10) ground state to a 3d(9)4s(1) excited state. A broad PL emission from these excited Cu+ ions has a peak near 523 nm and the related PLE band has a peak near 356 nm (this PLE band links the emission to the optical absorption band). Illuminating a Cu-diffused crystal at room temperature with 325 urn laser light converts a portion of the Cu+ ions to Cu2+ ions. EPR spectra from these 3d(9) ions are easily seen at low temperatures and their angular dependence is used to determine the g matrix and the Cu-63 hyperfine matrix. Subsequent heating produces a TL peak near 122 degrees C with a maximum in its spectral dependence near 535 nm. Correlated EPR measurements show that this TL peak occurs when trapped electrons are thermally released from unintentionally present transition-metal ions (most likely Fe) and recombine with holes at the Cu2+ ions. (C) 2015 Elsevier B.V. All rights reserved.
C1 [Holston, M. S.; Ferguson, I. P.; Giles, N. C.; McClory, J. W.] US Air Force, Inst Technol, Dept Engn Phys, Wright Patterson AFB, OH 45433 USA.
[Winarski, D. J.; Ji, Jianfeng; Selim, F. A.] Bowling Green State Univ, Dept Phys & Astron, Bowling Green, OH 43403 USA.
[Halliburton, L. E.] W Virginia Univ, Dept Phys & Astron, Morgantown, WV 26506 USA.
RP Halliburton, LE (reprint author), W Virginia Univ, Dept Phys & Astron, Morgantown, WV 26506 USA.
EM Larry.Halliburton@mail.wvu.edu
RI Selim, Farida/N-8077-2016
FU Air Force Institute of Technology by the Defense Threat Reduction Agency
[HDTRA1-07-1-0008, BRBAA08-I-2-0128]
FX This work was supported at the Air Force Institute of Technology by the
Defense Threat Reduction Agency (Grants HDTRA1-07-1-0008 and
BRBAA08-I-2-0128). The authors thank Michael Ranft and Greg Smith for
assistance with sample preparation and optical measurements. Views
expressed in this paper are those of the authors and do not necessarily
reflect the official policy or position of the Air Force, the Department
of Defense, or the United States Government.
NR 21
TC 1
Z9 1
U1 8
U2 30
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-2313
EI 1872-7883
J9 J LUMIN
JI J. Lumines.
PD FEB
PY 2016
VL 170
BP 17
EP 23
DI 10.1016/j.jlumin.2015.10.010
PN 1
PG 7
WC Optics
SC Optics
GA CX3NU
UT WOS:000365606600003
ER
PT J
AU Orlandi, S
Benini, E
Miglioli, I
Evans, DR
Reshetnyak, V
Zannoni, C
AF Orlandi, Silvia
Benini, Erika
Miglioli, Isabella
Evans, Dean R.
Reshetnyak, Victor
Zannoni, Claudio
TI Doping liquid crystals with nanoparticles. A computer simulation of the
effects of nanoparticle shape
SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS
LA English
DT Article
ID GAY-BERNE MODEL; ELECTROOPTIC PROPERTIES; AEROSIL NANOPARTICLES; GOLD
NANOPARTICLES; ORDER-PARAMETER; PHASE-DIAGRAM; BEHAVIOR; TRANSITION;
DYNAMICS; FLUID
AB We have studied, using Monte Carlo computer simulations, the effects that nanoparticles of similar size and three different shapes (spherical, elongated and discotic) dispersed at different concentrations in a liquid crystal (LC), have on the transition temperature, order parameter and mobility of the suspension. We have modelled the nanoparticles as berry-like clusters of spherical Lennard-Jones sites and the NP with a Gay-Berne model. We find that the overall phase behaviour is not affected by the addition of small amounts (x(N) = 0.1-0.5%) of nanoparticles, with the lowest perturbation obtained with disc-like nanoparticles at the lowest concentration. We observe a general decrease of the clearing temperature and a reduction in the orientational order with a change in its temperature variation, particularly in the case of the x(N) = 0.5% dispersions and with a more pronounced effect when the nanoparticles are spherical.
C1 [Orlandi, Silvia; Benini, Erika; Miglioli, Isabella; Zannoni, Claudio] Univ Bologna, Dipartimento Chim Ind Toso Montanari, Viale Risorgimento 4, IT-40136 Bologna, Italy.
[Orlandi, Silvia; Benini, Erika; Miglioli, Isabella; Zannoni, Claudio] Univ Bologna, INSTM, Viale Risorgimento 4, IT-40136 Bologna, Italy.
[Evans, Dean R.] US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Reshetnyak, Victor] Natl Taras Shevchenko Univ Kyiv, UA-01601 Kiev, Ukraine.
RP Zannoni, C (reprint author), Univ Bologna, Dipartimento Chim Ind Toso Montanari, Viale Risorgimento 4, IT-40136 Bologna, Italy.; Zannoni, C (reprint author), Univ Bologna, INSTM, Viale Risorgimento 4, IT-40136 Bologna, Italy.
EM dean.evans@us.af.mil; victor.reshetnyak@gmail.com;
claudio.zannoni@unibo.it
RI Reshetnyak, Victor/B-6722-2008; Zannoni, Claudio/E-3129-2010
OI Reshetnyak, Victor/0000-0003-0515-9814; Zannoni,
Claudio/0000-0002-7977-1005
FU USAF - EOARD [FA8655-11-1-3046]; Air Force Office of Scientific Research
FX We are grateful for support from USAF - EOARD through grant
FA8655-11-1-3046 and from the Air Force Office of Scientific Research.
We thank L. Muccioli and M. Ricci for useful discussions.
NR 58
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U1 7
U2 40
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1463-9076
EI 1463-9084
J9 PHYS CHEM CHEM PHYS
JI Phys. Chem. Chem. Phys.
PD JAN 28
PY 2016
VL 18
IS 4
BP 2428
EP 2441
DI 10.1039/c5cp05754j
PG 14
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA DC8YI
UT WOS:000369506000019
PM 26700502
ER
PT J
AU Harris, JR
Jensen, KL
Shiffler, DA
AF Harris, J. R.
Jensen, K. L.
Shiffler, D. A.
TI Edge enhancement control in linear arrays of ungated field emitters
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID VACUUM MICROELECTRONICS; EMISSION CATHODES; SURFACE FLASHOVER; CONES
AB In arrays of ungated field emitters, the field enhancement factor of each emitter decreases as the distance between the emitters decreases, an effect known as screening. At the edge of these arrays, emitters experience reduced screening, leading to higher field enhancement factors than emitters at the array center, causing nonuniform emission across the array. Here, we consider this effect in linear arrays of ungated field emitters spaced at distances comparable to their heights, which is the regime that generally maximizes their average current density. A Line Charge Model is used to assess the degree to which these edge effects propagate into the array interior, and to study the impact of varying the height, location, and tip radius of emitters at the ends of an array on the edge enhancement. It is shown that each of these techniques can accomplish this edge enhancement control, but each has advantages and disadvantages that will be discussed.
C1 [Harris, J. R.] US Navy Reserve, Navy Operat Support Ctr New Orleans, New Orleans, LA 70143 USA.
[Jensen, K. L.] Naval Res Lab, Code 6364, Washington, DC 20375 USA.
[Shiffler, D. A.] Air Force Res Lab, Directed Energy Directorate, Albuquerque, NM 87117 USA.
RP Harris, JR (reprint author), US Navy Reserve, Navy Operat Support Ctr New Orleans, New Orleans, LA 70143 USA.
OI Jensen, Kevin/0000-0001-8644-1680
FU Office of Naval Research Reserve Component Joint ST Focus Area; Air
Force Office of Scientific Research
FX The authors gratefully acknowledge the support they have received from
the Office of Naval Research Reserve Component Joint S&T Focus Area
(JRH) and from the Air Force Office of Scientific Research (KLJ),
without which this work would not have been possible.
NR 42
TC 5
Z9 5
U1 0
U2 4
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-8979
EI 1089-7550
J9 J APPL PHYS
JI J. Appl. Phys.
PD JAN 28
PY 2016
VL 119
IS 4
AR 043301
DI 10.1063/1.4940410
PG 8
WC Physics, Applied
SC Physics
GA DD4ME
UT WOS:000369896300004
ER
PT J
AU Rasskazov, IL
Karpov, SV
Panasyuk, GY
Markel, VA
AF Rasskazov, Ilia L.
Karpov, Sergei V.
Panasyuk, George Y.
Markel, Vadim A.
TI Overcoming the adverse effects of substrate on the waveguiding
properties of plasmonic nanoparticle chains
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID LINEAR-CHAINS; DISPERSION-RELATIONS; ARRAYS; RESONANCES; GUIDES;
NANOSPHERES; MODES; FIELD; POLARITONS; PARTICLES
AB We have studied numerically the propagation of surface plasmon polaritons (SPPs) in linear periodic chains of plasmonic nanoparticles of different shapes. The chains are deposited on top of a thick dielectric substrate. While in many commonly considered cases the substrate tends to suppress the SPP propagation, we have found that this adverse effect is practically absent in the case when the nanoparticles have the shape of oblate spheroids with sufficiently small aspect ratio (e.g., nanodisks) whose axes of symmetry coincide with the axis of the chain. (C) 2016 AIP Publishing LLC.
C1 [Rasskazov, Ilia L.; Karpov, Sergei V.] Siberian Fed Univ, Krasnoyarsk 660041, Russia.
[Karpov, Sergei V.] LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia.
[Karpov, Sergei V.] Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia.
[Panasyuk, George Y.] Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
[Markel, Vadim A.] Aix Marseille Univ, CNRS, Cent Marseille, Inst Fresnel,UMR 7249, F-13013 Marseille, France.
RP Markel, VA (reprint author), Aix Marseille Univ, CNRS, Cent Marseille, Inst Fresnel,UMR 7249, F-13013 Marseille, France.
EM vmarkel@mail.med.upenn.edu
RI Rasskazov, Ilia/H-7758-2016; Karpov, Sergei/J-3506-2016; Markel,
Vadim/A-1029-2007
OI Rasskazov, Ilia/0000-0002-7956-1702; Karpov, Sergei/0000-0002-5170-1697;
Markel, Vadim/0000-0002-9748-6865
FU A*MIDEX project - "Investissements d'Avenir" French Government program
[ANR-11-IDEX-0001-02]; U.S. National Science Foundation [DMS1216970];
Ministry of Education and Science of the Russian Federation [1792]
FX This work has been carried out thanks to the support of the A*MIDEX
project (No. ANR-11-IDEX-0001-02) funded by the "Investissements
d'Avenir" French Government program, managed by the French National
Research Agency (ANR) and was also supported in part by the U.S.
National Science Foundation under Grant No. DMS1216970 and by the
Ministry of Education and Science of the Russian Federation under
Contract No. 1792.
NR 43
TC 2
Z9 2
U1 1
U2 13
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-8979
EI 1089-7550
J9 J APPL PHYS
JI J. Appl. Phys.
PD JAN 28
PY 2016
VL 119
IS 4
AR 043101
DI 10.1063/1.4940415
PG 8
WC Physics, Applied
SC Physics
GA DD4ME
UT WOS:000369896300001
ER
PT J
AU Sun, LM
Huang, YJ
Bian, ZH
Petrosino, J
Fan, Z
Wang, YZ
Park, KH
Yue, T
Schmidt, M
Galster, S
Ma, JJ
Zhu, H
Zhang, MJ
AF Sun, Leming
Huang, Yujian
Bian, Zehua
Petrosino, Jennifer
Fan, Zhen
Wang, Yongzhong
Park, Ki Ho
Yue, Tao
Schmidt, Michael
Galster, Scott
Ma, Jianjie
Zhu, Hua
Zhang, Mingjun
TI Sundew-Inspired Adhesive Hydrogels Combined with Adipose-Derived Stem
Cells for Wound Healing
SO ACS APPLIED MATERIALS & INTERFACES
LA English
DT Article
DE sundew adhesive; bioinspiration; adhesive hydrogels; ADSCs; wound
healing
ID IN-VITRO; DROSERA-CAPENSIS; CALCIUM; STIFFNESS; ALGINATE; NANOPARTICLES;
KERATINOCYTES; DIFFERENTIATE; REGENERATION; DRESSINGS
AB The potential to harness the unique physical, chemical, and biological properties of the sundew (Drosera) plant's adhesive hydrogels has long intrigued researchers searching for novel wound-healing applications. However, the ability to collect sufficient quantities of the sundew plant's adhesive hydrogels is problematic and has eclipsed their therapeutic promise. Inspired by these natural hydrogels, we asked if sundew-inspired adhesive hydrogels could overcome the drawbacks associated with natural sundew hydrogels and be used in combination with stem-cell-based therapy to enhance wound-healing therapeutics. Using a bioinspired approach, we synthesized adhesive hydrogels comprised of sodium alginate, gum arabic, and calcium ions to mimic the properties of the natural sundew-derived adhesive hydrogels. We then characterized and showed that these sundew-inspired hydrogels promote wound healing through their superior adhesive strength, nanostructure, and resistance to shearing when compared to other hydrogels in vitro. In vivo, sundew-inspired hydrogels promoted a "suturing" effect to wound sites, which was demonstrated by enhanced wound closure following topical application of the hydrogels. In combination with mouse adipose derived stem cells (ADSCs) and compared to other therapeutic biomaterials, the sundew-inspired hydrogels demonstrated superior wound-healing capabilities. Collectively, our studies show that sundew-inspired hydrogels contain ideal properties that promote wound healing and suggest that sundew-inspired ADSCs combination therapy is an efficacious approach for treating wounds without eliciting noticeable toxicity or inflammation.
C1 [Sun, Leming; Huang, Yujian; Fan, Zhen; Wang, Yongzhong; Yue, Tao; Schmidt, Michael; Zhang, Mingjun] Ohio State Univ, Dept Biomed Engn, Coll Engn, Columbus, OH 43210 USA.
[Sun, Leming; Huang, Yujian; Bian, Zehua; Fan, Zhen; Wang, Yongzhong; Park, Ki Ho; Yue, Tao; Ma, Jianjie; Zhu, Hua; Zhang, Mingjun] Ohio State Univ, Dorothy M Davis Heart & Lung Res Inst, Columbus, OH 43210 USA.
[Bian, Zehua; Park, Ki Ho; Ma, Jianjie; Zhu, Hua] Ohio State Univ, Dept Surg, Columbus, OH 43210 USA.
[Petrosino, Jennifer] Ohio State Univ, Biomed Sci Grad Program, Coll Med, Columbus, OH 43210 USA.
[Zhu, Hua; Zhang, Mingjun] Ohio State Univ, Interdisciplinary Biophys Grad Program, Columbus, OH 43210 USA.
[Galster, Scott] Air Force Res Lab, Human Performance Wing 711, Wright Patterson AFB, OH 45433 USA.
RP Zhang, MJ (reprint author), Ohio State Univ, Dept Biomed Engn, Coll Engn, Columbus, OH 43210 USA.; Zhu, H; Zhang, MJ (reprint author), Ohio State Univ, Dorothy M Davis Heart & Lung Res Inst, Columbus, OH 43210 USA.; Zhu, H (reprint author), Ohio State Univ, Dept Surg, Columbus, OH 43210 USA.; Zhu, H; Zhang, MJ (reprint author), Ohio State Univ, Interdisciplinary Biophys Grad Program, Columbus, OH 43210 USA.
EM Hua.Zhu@osumc.edu; zhang.4882@osu.edu
RI Yue, Tao/N-7344-2014; Huang, Yujian/B-2085-2016
OI Yue, Tao/0000-0001-8321-1898; Huang, Yujian/0000-0001-8543-0269
FU NIGMS NIH HHS [T32 GM068412]
NR 48
TC 2
Z9 2
U1 7
U2 29
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1944-8244
J9 ACS APPL MATER INTER
JI ACS Appl. Mater. Interfaces
PD JAN 27
PY 2016
VL 8
IS 3
BP 2423
EP 2434
DI 10.1021/acsami.5b11811
PG 12
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
SC Science & Technology - Other Topics; Materials Science
GA DC2JX
UT WOS:000369044100103
PM 26731614
ER
PT J
AU Reshetnyak, VY
Pinkevych, IP
Sluckin, TJ
Evans, DR
AF Reshetnyak, V. Yu.
Pinkevych, I. P.
Sluckin, T. J.
Evans, D. R.
TI Cloaking by shells with radially inhomogeneous anisotropic permittivity
SO OPTICS EXPRESS
LA English
DT Article
ID TRANSFORMATION OPTICS; LIGHT
AB We model electromagnetic cloaking of a spherical or cylindrical nanoparticle enclosed by an optically anisotropic and optically inhomogeneous symmetric shell, by examining its electric response in a quasi-static uniform electric field. When the components of the shell permittivity are radially anisotropic and power-law dependent (epsilon similar to r(m)) where r is distance to the shell center, and m a positive or negative exponent which can be varied), the problem is analytically tractable. Formulas are calculated for the degree of cloaking in the general case, allowing the determination of a dielectric condition for the shells to be used as an invisibility cloak. Ideal cloaking is known to require that homogeneous shells exhibit an infinite ratio of tangential and radial components of the shell permittivity, but for radially inhomogeneous shells ideal cloaking can occur even for finite values of this ratio. (C) 2015 Optical Society of America
C1 [Reshetnyak, V. Yu.; Pinkevych, I. P.] Taras Shevchenko Natl Univ Kyiv, Fac Phys, 64 Volodymyrska St, UA-01601 Kiev, Ukraine.
[Sluckin, T. J.] Univ Southampton, Div Math Sci, Southampton SO17 1BJ, Hants, England.
[Evans, D. R.] Mat & Mfg Directorate, Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Sluckin, TJ (reprint author), Univ Southampton, Div Math Sci, Southampton SO17 1BJ, Hants, England.
EM t.j.sluckin@soton.ac.uk
RI Reshetnyak, Victor/B-6722-2008
OI Reshetnyak, Victor/0000-0003-0515-9814
FU EOARD [118007]; hospitality of the University of Southampton; Centro de
Investigacion en Quimica Aplicada, Mexico; Augustine Urbas (AFRL, USA)
FX We acknowledge financial support from EOARD (grant 118007 to VYR and
IPP), the hospitality of the University of Southampton (VYR), and useful
discussions with Dr. Ron Ziolo (Centro de Investigacion en Quimica
Aplicada, Mexico), as well as with Drs. Sergey Basun and Augustine Urbas
(AFRL, USA).
NR 22
TC 2
Z9 2
U1 4
U2 8
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1094-4087
J9 OPT EXPRESS
JI Opt. Express
PD JAN 25
PY 2016
VL 24
IS 2
BP A21
EP A32
DI 10.1364/OE.24.000A21
PG 12
WC Optics
SC Optics
GA DC2SJ
UT WOS:000369066300002
PM 26832575
ER
PT J
AU Huang, CYY
Huang, Y
Su, YJ
Sutton, EK
Hairston, MR
Coley, WR
AF Huang, Cheryl Yu-Ying
Huang, Yanshi
Su, Yi-Jiun
Sutton, Eric K.
Hairston, Marc Rotan
Coley, William Robin
TI Ionosphere-thermosphere (IT) response to solar wind forcing during
magnetic storms
SO JOURNAL OF SPACE WEATHER AND SPACE CLIMATE
LA English
DT Article
DE Ionosphere; Thermosphere; Solar wind; Polar cap; Energy distribution
ID PROTON PRECIPITATION; EMPIRICAL-MODEL; ART.; SATELLITE; ELECTRON; CHAMP;
MAGNETOSPHERE; CONDUCTIVITY; IONIZATION; ATMOSPHERE
AB During magnetic storms, there is a strong response in the ionosphere and thermosphere which occurs at polar latitudes. Energy input in the form of Poynting flux and energetic particle precipitation, and energy output in the form of heated ions and neutrals have been detected at different altitudes and all local times. We have analyzed a number of storms, using satellite data from the Defense Meteorological Satellite Program (DMSP), the Gravity Recovery and Climate Experiment (GRACE), Gravity field and steady-state Ocean Circulation Explorer (GOCE), and Thermosphere Ionosphere Mesosphere Energetics and Dynamics (TIMED) mission. Poynting flux measured by instruments on four DMSP spacecraft during storms which occurred in 2011-2012 was observed in both hemispheres to peak at both auroral and polar latitudes. By contrast, the measured ion temperatures at DMSP and maxima in neutral density at GOCE and GRACE altitudes maximize in the polar region most frequently with little evidence of Joule heating at auroral latitudes at these spacecraft orbital locations.
C1 [Huang, Cheryl Yu-Ying; Su, Yi-Jiun; Sutton, Eric K.] Air Force Res Lab, Kirtland AFB, NM 87117 USA.
[Huang, Yanshi] Univ New Mexico, Albuquerque, NM 87131 USA.
[Hairston, Marc Rotan; Coley, William Robin] Univ Texas Dallas, Richardson, TX 75080 USA.
RP Huang, CYY (reprint author), Air Force Res Lab, Kirtland AFB, NM 87117 USA.
EM cheryl.huang@us.af.mil
RI Sutton, Eric/A-1574-2016
OI Sutton, Eric/0000-0003-1424-7189
FU Air Force Office of Scientific Research [LRIR 14 RV11COR,
FA9550-14-1-0280]; National Science Foundation under Grant NSF
[AGS-1259508]
FX We acknowledge the support of the Air Force Office of Scientific
Research under Grants LRIR 14 RV11COR and FA9550-14-1-0280, and the
National Science Foundation under Grant NSF Grant AGS-1259508. The
authors wish to thank Dr. Daniel Ober and Dr. Gordon Wilson for
providing DMSP magnetic field data. The OMNI data used in this study are
available at the OMNIWeb interface (http://omniweb.gsfc.nasa.gov). The
GOCE data are available through the European Space Agency website
(https://earth.esa.int/web/guest/-/goce-data-access-7219 <
https://earth.esa.int/web/guest/-/goce-data-access-7219 >). The editor
thanks Delores Knipp and an anonymous referee for their assistance in
evaluating this paper.
NR 40
TC 3
Z9 3
U1 3
U2 12
PU EDP SCIENCES S A
PI LES ULIS CEDEX A
PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A,
FRANCE
SN 2115-7251
J9 J SPACE WEATHER SPAC
JI J. Space Weather Space Clim.
PD JAN 25
PY 2016
VL 6
AR A4
DI 10.1051/swsc/2015041
PG 11
WC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology &
Atmospheric Sciences
SC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology &
Atmospheric Sciences
GA DD3AG
UT WOS:000369792700003
ER
PT J
AU Bedford, NM
Hughes, ZE
Tang, ZH
Li, Y
Briggs, BD
Ren, Y
Swihart, MT
Petkov, VG
Naik, RR
Knecht, MR
Walsh, TR
AF Bedford, Nicholas M.
Hughes, Zak E.
Tang, Zhenghua
Li, Yue
Briggs, Beverly D.
Ren, Yang
Swihart, Mark T.
Petkov, Valeri G.
Naik, Rajesh R.
Knecht, Marc R.
Walsh, Tiffany R.
TI Sequence-Dependent Structure/Function Relationships, of Catalytic
Peptide-Enabled Gold Nanoparticles Generated under Ambient Synthetic
Conditions
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID MONTE-CARLO-SIMULATION; X-RAY-DIFFRACTION; BINDING PEPTIDES;
NANOMATERIAL SYNTHESIS; BIOMIMETIC SYNTHESIS; ADSORPTION BEHAVIOR;
MEDIATED SYNTHESIS; REPLICA EXCHANGE; AQUEOUS-SOLUTION; RECOGNITION
AB Peptide-enabled nanoparticle (NP) synthesis routes can create and/or assemble functional nanomaterials under environmentally friendly conditions, with properties dictated by complex interactions at the biotic/abiotic interface. Manipulation of this interface through sequence modification can provide the capability for material properties to be tailored to create enhanced materials for energy, catalysis, and sensing applications. Fully realizing the potential of these materials requires a comprehensive understanding of sequence-dependent structure/function relationships that is presently lacking. In this work, the atomic-scale structures of a series of peptide-capped Au NPs are determined using a combination of atomic pair distribution function analysis of high-energy X-ray diffraction data and advanced molecular dynamics (MD) simulations. The Au NPs produced with different peptide sequences exhibit varying degrees of catalytic activity for the exemplar reaction 4-nitrophenol reduction. The experimentally derived atomic-scale NP configurations reveal sequence-dependent differences in structural order at the NP surface. Replica exchange with solute-tempering MD simulations are then used to predict the morphology of the peptide overlayer on these Au NPs and identify factors determining the structure/catalytic properties relationship. We show that the amount of exposed Au surface, the underlying surface structural disorder, and the interaction strength of the peptide with the Au surface all influence catalytic performance. A simplified computational prediction of catalytic performance is developed that can potentially serve as a screening tool for future studies. Our approach provides a platform for broadening the analysis of catalytic peptide-enabled metallic NP systems, potentially allowing for the development of rational design rules for property enhancement.
C1 [Bedford, Nicholas M.] NIST, Appl Chem & Mat Div, Boulder, CO 80305 USA.
[Bedford, Nicholas M.; Naik, Rajesh R.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Bedford, Nicholas M.; Briggs, Beverly D.; Knecht, Marc R.] Univ Miami, Dept Chem, Coral Gables, FL 33146 USA.
[Hughes, Zak E.; Walsh, Tiffany R.] Deakin Univ, Inst Frontier Mat, Geelong, Vic 3216, Australia.
[Tang, Zhenghua] S China Univ Technol, Guangzhou Higher Educ Mega Ctr, New Energy Res Inst, Sch Environm & Energy, Guangzhou 510006, Guangdong, Peoples R China.
[Li, Yue; Swihart, Mark T.] SUNY Buffalo, Chem & Biol Engn, Buffalo, NY 14260 USA.
[Ren, Yang] Argonne Natl Lab, Adv Photon Source, 9700 S Cass Ave, Argonne, IL 60439 USA.
[Petkov, Valeri G.] Cent Michigan Univ, Dept Phys, Mt Pleasant, MI 48858 USA.
RP Bedford, NM (reprint author), NIST, Appl Chem & Mat Div, Boulder, CO 80305 USA.; Bedford, NM; Naik, RR (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.; Bedford, NM; Knecht, MR (reprint author), Univ Miami, Dept Chem, Coral Gables, FL 33146 USA.; Walsh, TR (reprint author), Deakin Univ, Inst Frontier Mat, Geelong, Vic 3216, Australia.
EM nicholas.bedford@nist.gov; rajesh.naik@us.af.mil; knecht@miami.edu;
tiffany.walsh@deakin.edu.au
RI Tang, Zhenghua/H-3436-2011; Swihart, Mark/A-3182-2008; Walsh,
Tiffany/C-2667-2009; Hughes, Zak/B-9835-2017
OI Tang, Zhenghua/0000-0003-0718-3164; Swihart, Mark/0000-0002-9652-687X;
Walsh, Tiffany/0000-0002-0233-9484; Hughes, Zak/0000-0003-2166-9822
FU Air Force Office for Scientific Research (AFOSR LRIR)
[FA9550-12-1-0226]; DOE-BES [DE-SC0006877]; National Research Council;
veski; DOE Office of Science [DE-AC02-06CH11357]
FX This work was partially supported by the Air Force Office for Scientific
Research (M.R.K. and T.R.W., Grant No. FA9550-12-1-0226; R.R.N., AFOSR
LRIR) and DOE-BES grant DE-SC0006877 (V.G.P.). N.M.B. acknowledges
fellowship support from the National Research Council Research
Associateship award during the initial experiments of this study. T.R.W.
thanks veski for an Innovation Fellowship. T.R.W. and Z.E.H. gratefully
acknowledge the National Computing Infrastructure (NCI) for access to
supercomputing resources. Access to beamline 11-ID-C of the Advanced
Photon Source, a U.S. Department of Energy (DOE) Office of Science User
Facility operated for the DOE Office of Science by Argonne National
Laboratory under Contract No. DE-AC02-06CH11357, is greatly appreciated.
NR 57
TC 13
Z9 13
U1 29
U2 76
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD JAN 20
PY 2016
VL 138
IS 2
BP 540
EP 548
DI 10.1021/jacs.5b09529
PG 9
WC Chemistry, Multidisciplinary
SC Chemistry
GA DB5OF
UT WOS:000368562800014
PM 26679562
ER
PT J
AU Cahay, M
Zhu, W
Fairchild, S
Murray, PT
Back, TC
Gruen, GJ
AF Cahay, M.
Zhu, W.
Fairchild, S.
Murray, P. T.
Back, T. C.
Gruen, G. J.
TI Multiscale model of heat dissipation mechanisms during field emission
from carbon nanotube fibers
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID YARNS; TIP; ELECTRONS; EMITTERS; FILMS
AB A multiscale model of field emission (FE) from carbon nanotube fibers (CNFs) is developed, which takes into account Joule heating within the fiber and radiative cooling and the Nottingham effect at the tip of the individual carbon nanotubes (CNTs) in the array located at the fiber tip. The model predicts the fraction of CNTs being destroyed as a function of the applied external electric field and reproduces many experimental features observed in some recently investigated CNFs, such as order of magnitude of the emission current (mA range), low turn on electric field (fraction of V/mu m), deviation from pure Fowler-Nordheim behavior at large applied electric field, hysteresis of the FE characteristics, and a spatial variation of the temperature along the CNF axis with a maximum close to its tip of a few hundred degrees C. (C) 2016 AIP Publishing LLC.
C1 [Cahay, M.; Zhu, W.] Univ Cincinnati, Spintron & Vacuum Nanoelect Lab, Cincinnati, OH 45221 USA.
[Fairchild, S.] US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Murray, P. T.; Back, T. C.; Gruen, G. J.] Univ Dayton, Res Inst, Dayton, OH 45469 USA.
[Murray, P. T.; Back, T. C.] Univ Dayton, Ctr Excellence Thin Film Res & Surface Engn, Dayton, OH 45469 USA.
RP Cahay, M (reprint author), Univ Cincinnati, Spintron & Vacuum Nanoelect Lab, Cincinnati, OH 45221 USA.
FU Air Force at the Materials and Manufacturing Directorate (AFRL/RXAP)
[FA8650-11-D-5401]
FX This work was supported by Air Force Contract No. FA8650-11-D-5401 at
the Materials and Manufacturing Directorate (AFRL/RXAP). The authors
thank John Luginsland and Jason Marshall at AFOSR for supporting this
work.
NR 33
TC 4
Z9 4
U1 4
U2 7
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JAN 18
PY 2016
VL 108
IS 3
AR 033110
DI 10.1063/1.4940390
PG 5
WC Physics, Applied
SC Physics
GA DH8PB
UT WOS:000373055500047
ER
PT J
AU Robbins, MJ
Lunday, BJ
AF Robbins, Matthew J.
Lunday, Brian J.
TI A bilevel formulation of the pediatric vaccine pricing problem
SO EUROPEAN JOURNAL OF OPERATIONAL RESEARCH
LA English
DT Article
DE Pediatric vaccine pricing; Bilevel programming; Heuristic; Nelder-Mead
search; Cyclic coordinate method
ID UNITED-STATES; CHILDHOOD IMMUNIZATION; COMBINATION VACCINES;
ECONOMIC-EVALUATION; ADVISORY-COMMITTEE; ALGORITHM; MODEL; VACCINATIONS;
OPTIMIZATION; SELECTION
AB We consider the characterization of optimal pricing strategies for a pediatric vaccine manufacturing firm operating in an oligopolistic market. The pediatric vaccine pricing problem (PVPP) is formulated as a bilevel mathematical program wherein the upper level models a firm that selects profit-maximizing vaccine prices while the lower level models a representative customer's vaccine purchasing decision to satisfy a given, recommended childhood immunization schedule (RCIS) at overall minimum cost. Complicating features of the bilevel program include the bilinear nature of the upper-level objective function and the binary nature of the lower-level decision variables. We develop and test variants of three heuristics to identify the pricing scheme that will maximize a manufacturer's profit: a Latin Hypercube Sampling (LHS) of the upper-level feasible region, an LHS enhanced by a Nelder-Meade search from each price point, and an LHS enhanced by a custom implementation of the Cyclic Coordinate Method from each price point. The practicality of the PVPP is demonstrated via application to the analysis of the 2014 United States pediatric vaccine private sector market. Testing results indicate that a robust sampling method combined with local search is the superlative solution method among those examined and, in the current market, that a manufacturer acting unilaterally has the potential to increase profit per child completing the RCIS by 35 percent (from 231.84 to 312.55 dollars) for GlaxoSmithKline, 47 percent (from 63.96 to 93.70 dollars) for Merck, and 866 percent (from 25.99 to 251.04 dollars) for Sanofi Pasteur over that obtained via current pricing mechanisms. Published by Elsevier B.V.
C1 [Robbins, Matthew J.; Lunday, Brian J.] US Air Force, Inst Technol, Dept Operat Sci, Wright Patterson AFB, OH 45433 USA.
RP Robbins, MJ (reprint author), US Air Force, Inst Technol, Dept Operat Sci, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM matthew.robbins@afit.edu; brian.lunday@afit.edu
OI Lunday, Brian/0000-0001-5191-4361
NR 53
TC 3
Z9 3
U1 7
U2 42
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0377-2217
EI 1872-6860
J9 EUR J OPER RES
JI Eur. J. Oper. Res.
PD JAN 16
PY 2016
VL 248
IS 2
BP 634
EP 645
DI 10.1016/j.ejor.2015.06.075
PG 12
WC Management; Operations Research & Management Science
SC Business & Economics; Operations Research & Management Science
GA CT2HB
UT WOS:000362621500023
ER
PT J
AU Koerner, H
Opsitnick, E
Grabowski, CA
Drummy, LF
Hsiao, MS
Che, J
Pike, M
Person, V
Bockstaller, MR
Meth, JS
Vaia, RA
AF Koerner, Hilmar
Opsitnick, Elizabeth
Grabowski, Christopher A.
Drummy, Larry F.
Hsiao, Ming-Siao
Che, Justin
Pike, Megan
Person, Vernecia
Bockstaller, Michael R.
Meth, Jeff S.
Vaia, Richard A.
TI Physical Aging and Glass Transition of Hairy Nanoparticle Assemblies
SO JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
LA English
DT Article
DE Glass transition temperature; Physical aging; Polymer grafted
nanoparticle; Polymer nanocomposite
ID CONCENTRATED POLYMER BRUSH; STRUCTURAL RELAXATION; SILICA PARTICLES;
MOLECULAR-WEIGHT; ENTHALPY RELAXATION; NANOCOMPOSITES; POLYSTYRENE;
TEMPERATURE; DEPENDENCE; FILMS
AB Matrix free assemblies of polymer-grafted, "hairy" nanoparticles (aHNP) exhibit novel morphology, dielectric, and mechanical properties, as well as providing means to overcome dispersion challenges ubiquitous to conventional polymer-inorganic nanocomposite blends. Physical aging of the amorphous polymer glass between the close-packed nanoparticles (NPs) will dominate long-term stability; however, the energetics of volume recovery within the aHNPs is unknown. Herein, we compare glass transition temperature (T-g) and enthalpy recovery of aHNPs to NP-polymer blends, across different nano-silica loadings (0-50 v/v%) and canopy architecture of polystyrene (PS) grafted silica. For aHNPs, the grafting of PS to silica imposes an additional design constraint between silica volume fraction, graft density, and graft molecular weight. At low and intermediate silica volume fraction, the Inc of blended nanocomposites is independent of silica content, reflecting a neutral polymer-NP interface. For aHNPs, the T-g decreases with silica content, implying that chain tethering decreases local segment density more than the effect of molecular weight or polymer-NP interactions. Additionally, the T-g of the aHNPs is higher than a linear matrix of comparable molecular weight, implying a complementary effect to local segment density that constrains cooperativity. In contrast, enthalpy recovery rate in the blend or aHNP glass is retarded comparably. In addition, a cross-over temperature, T-x, emerges deep within the glass where the enthalpy recovery process of all nanocomposites becomes similar to linear unfilled matrices. Differences between structural recovery in aHNP and blended nanocomposites occur only at the highest silica loadings (similar to 50 v/v%), where enthalpy recovery for aHNPs is substantially suppressed relative to the blended counterparts. The absence of physical aging at these loadings is independent of brush architecture (graft density or molecular weight of tethered chains) and indicates that the impact of chain tethering on effective bulk structural relaxation starts to appear at particle-particle surface separations on the order of the Kuhn length. Overall, these observations can be understood within the context of how three separate structural characteristics impact local segment density and relaxation processes: the dimension and architecture of the tethered polymer chains, the separation between NP surfaces, and the confinement imposed by chain tethering and space filling within the aHNP. (C) 2015 Wiley Periodicals, Inc.
C1 [Koerner, Hilmar; Opsitnick, Elizabeth; Grabowski, Christopher A.; Drummy, Larry F.; Hsiao, Ming-Siao; Che, Justin; Pike, Megan; Vaia, Richard A.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Person, Vernecia] Clark Atlanta Univ, Dept Chem, Sw Atlanta, GA 30314 USA.
[Bockstaller, Michael R.] Carnegie Mellon Univ, Dept Mat Sci & Engn, Pittsburgh, PA 15213 USA.
[Meth, Jeff S.] EI DuPont de Nemours, DuPont Cent Res & Dev, Wilmington, DE 19803 USA.
RP Vaia, RA (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM richard.vaia@us.af.mil
RI Bockstaller, Michael/A-9124-2011;
OI Bockstaller, Michael/0000-0001-9046-9539; Hsiao,
Ming-siao/0000-0001-9319-653X
FU Air Force Office of Scientific Research
FX Funding provided by the Air Force Office of Scientific Research is
gratefully acknowledged. JSM would like to thank Steve Zane and Changzai
Chi for technical assistance.
NR 60
TC 2
Z9 2
U1 8
U2 54
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0887-6266
EI 1099-0488
J9 J POLYM SCI POL PHYS
JI J. Polym. Sci. Pt. B-Polym. Phys.
PD JAN 15
PY 2016
VL 54
IS 2
SI SI
BP 319
EP 330
DI 10.1002/polb.23931
PG 12
WC Polymer Science
SC Polymer Science
GA CY6IJ
UT WOS:000366512200024
ER
PT J
AU Penilla, EH
Hardin, CL
Kodera, Y
Basun, SA
Evans, DR
Garay, JE
AF Penilla, E. H.
Hardin, C. L.
Kodera, Y.
Basun, S. A.
Evans, D. R.
Garay, J. E.
TI The role of scattering and absorption on the optical properties of
birefringent polycrystalline ceramics: Modeling and experiments on ruby
(Cr:Al2O3)
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID PRESSURE-ASSISTED DENSIFICATION; TRANSPARENT CERAMICS; ALUMINA;
ZIRCONIA; EMISSION; SPINEL; AL2O3
AB Light scattering due to birefringence has prevented the use of polycrystalline ceramics with anisotropic optical properties in applications such as laser gain media. However, continued development of processing technology has allowed for very low porosity and fine grains, significantly improving transparency and is paving the way for polycrystalline ceramics to be used in demanding optical applications. We present a method for producing highly transparent Cr3+ doped Al2O3 (ruby) using current activated pressure assisted densification. The one-step doping/densification process produces fine grained ceramics with well integrated (doped) Cr, resulting in good absorption and emission. In order to explain the light transmission properties, we extend the analytical model based on the Rayleigh-Gans-Debye approximation that has been previously used for undoped alumina to include absorption. The model presented captures reflection, scattering, and absorption phenomena in the ceramics. Comparison with measured transmission confirms that the model adequately describes the properties of polycrystalline ruby. In addition the measured emission spectra and emission lifetime are found to be similar to single crystals, confirming the high optical quality of the ceramics. (C) 2016 AIP Publishing LLC.
C1 [Penilla, E. H.; Hardin, C. L.; Kodera, Y.; Garay, J. E.] Univ Calif Riverside, Mat Sci & Engn Program, Riverside, CA 92521 USA.
[Penilla, E. H.; Hardin, C. L.; Kodera, Y.; Garay, J. E.] Univ Calif Riverside, Dept Mech Engn, Riverside, CA 92521 USA.
[Basun, S. A.; Evans, D. R.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Garay, JE (reprint author), Univ Calif Riverside, Mat Sci & Engn Program, Riverside, CA 92521 USA.; Garay, JE (reprint author), Univ Calif Riverside, Dept Mech Engn, Riverside, CA 92521 USA.
EM jegaray@engr.ucr.edu
FU multidisciplinary research initiative (MRI) from the High Energy
Lasers-Joint Technology Office (HEL-JTO)
FX We gratefully acknowledge the funding of this work by a
multidisciplinary research initiative (MRI) from the High Energy
Lasers-Joint Technology Office (HEL-JTO) administered by the Army
Research Office (ARO).
NR 21
TC 0
Z9 0
U1 13
U2 24
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-8979
EI 1089-7550
J9 J APPL PHYS
JI J. Appl. Phys.
PD JAN 14
PY 2016
VL 119
IS 2
AR 023106
DI 10.1063/1.4939090
PG 7
WC Physics, Applied
SC Physics
GA DC5UA
UT WOS:000369284800006
ER
PT J
AU Bag, S
Patel, RJ
Bunha, A
Grand, C
Berrigan, JD
Dalton, MJ
Leever, BJ
Reynolds, JR
Durstock, MF
AF Bag, Santanu
Patel, Romesh J.
Bunha, Ajaykumar
Grand, Caroline
Berrigan, J. Daniel
Dalton, Matthew J.
Leever, Benjamin J.
Reynolds, John R.
Durstock, Michael F.
TI Tandem Solar Cells from Accessible Low Band-Gap Polymers Using an
Efficient Interconnecting Layer
SO ACS APPLIED MATERIALS & INTERFACES
LA English
DT Article
DE polymers; tandem solar cells; scalable; isoindigo; interconnecting
layer; solution processing
ID POWER-CONVERSION EFFICIENCY
AB Tandem solar cell architectures are designed to improve device photoresponse by enabling the capture of wider range of solar spectrum as compared to single-junction device. However, the practical realization of this concept in bulk-heterojunction polymer systems requires the judicious design of a transparent interconnecting layer compatible with both polymers. Moreover, the polymers selected should be readily synthesized at large scale (>1 kg) and high performance. In this work, we demonstrate a novel tandem polymer solar cell that combines low band gap poly isoindigo [P(T3-iI)-2], which is easily synthesized in kilogram quantities, with a novel Cr/MoO3 interconnecting layer. Cr/MoO3 is shown to be greater than 80% transparent above 375 nm and an efficient interconnecting layer for P(T3-iI)-2 and PCDTBT, leading to 6% power conversion efficiencies under AM 1.5G illumination. These results serve to extend the range of interconnecting layer materials for tandem cell fabrication by establishing, for the first time, that a thin, evaporated layer of Cr/MoO3 can work as an effective interconnecting layer in a tandem polymer solar cells made with scalable photoactive materials.
C1 [Bag, Santanu; Patel, Romesh J.; Bunha, Ajaykumar; Berrigan, J. Daniel; Dalton, Matthew J.; Leever, Benjamin J.; Durstock, Michael F.] US Air Force, Res Lab, Mat & Mfg Directorate, Dayton, OH 45433 USA.
[Bag, Santanu; Patel, Romesh J.; Bunha, Ajaykumar] UES Inc, Biol & Nanoscale Technol Div, Dayton, OH 45432 USA.
[Grand, Caroline; Reynolds, John R.] Georgia Inst Technol, Georgia Tech Polymer Network, Ctr Organ Photon & Elect, Sch Chem & Biochem,Sch Mat Sci & Engn, Atlanta, GA 30332 USA.
RP Bag, S; Durstock, MF (reprint author), US Air Force, Res Lab, Mat & Mfg Directorate, Dayton, OH 45433 USA.; Bag, S (reprint author), UES Inc, Biol & Nanoscale Technol Div, Dayton, OH 45432 USA.
EM santanu.bag.ctr.in@us.af.mil; michael.durstock@us.af.mil
FU Air Force Office of Scientific Research (AFSOR); Air Force Research
Laboratory (AFRL); Office of Naval Research [N00014-14-0173]
FX Financial supports from the Air Force Office of Scientific Research
(AFSOR) and the Air Force Research Laboratory (AFRL) are highly
appreciated. J.R.R. acknowledges funding of this work from the Office of
Naval Research (N00014-14-0173).
NR 17
TC 0
Z9 0
U1 2
U2 26
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1944-8244
J9 ACS APPL MATER INTER
JI ACS Appl. Mater. Interfaces
PD JAN 13
PY 2016
VL 8
IS 1
BP 16
EP 19
DI 10.1021/acsami.5b10170
PG 4
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
SC Science & Technology - Other Topics; Materials Science
GA DB5OH
UT WOS:000368563000004
PM 26699653
ER
PT J
AU Jawaid, A
Nepal, D
Park, K
Jespersen, M
Qualley, A
Mirau, P
Drummy, LF
Vaia, RA
AF Jawaid, Ali
Nepal, Dhriti
Park, Kyoungweon
Jespersen, Michael
Qualley, Anthony
Mirau, Peter
Drummy, Lawrence F.
Vaia, Richard A.
TI Mechanism for Liquid Phase Exfoliation of MoS2
SO CHEMISTRY OF MATERIALS
LA English
DT Article
ID SINGLE-LAYER MOS2; MOLYBDENUM-DISULFIDE; ELECTRONIC-STRUCTURE;
N-METHYLPYRROLIDONE; HYDROGEN EVOLUTION; BASAL-PLANE; NANOSHEETS;
INTERCALATION; OXIDATION; CRYSTALS
AB A highly efficient, reproducible, and scalable approach for exfoliation of MoS2 is critical for utilizing these emerging materials from coatings and composites to printable devices. Additive-free techniques, such as solvent-assisted exfoliation via sonication, are considered to be the most viable approach, where N-methyl-2-pyrrolidone (NMP) is the most effective solvent. However, understanding the mechanism of exfoliation and the key role NMP plays during the process have been elusive and challenges effective improvements in product yield and quality. Here, we report systematic experiments to understand the mechanism of solvent-assisted exfoliation by elucidating the sonolysis chemistries associated with NMP. It is confirmed that in the presence of O-2(g) dissolved moisture in NMP plays a critical role during sonication. The higher the moisture content, the more efficient the exfoliation process is. Conversely, when exfoliations are carried out with dried solvents with an inert atmosphere, reaction yields decrease. This is due to redox-active species formed in situ through an autoxidation pathway that converts NMP to N-methyl succinimide by hydroperoxide intermediates. These highly reactive species appear to aid exfoliation by oxidation at reactive edge sites; the charging creates Coulombic repulsion between neighboring sheets that disrupts interlayer basal plane bonding and enables electrostatic stabilization of particles in high-dipole solvents. From these insights, exfoliation in previously reported inactive solvents (e.g., acetonitrile), as well as in the absence of probe sonication, is demonstrated. These findings illustrate that exfoliation of MoS2, and possibly TMD's in general, can be mediated through understanding the chemistry occurring at the surface-solvent interface.
C1 [Jawaid, Ali; Nepal, Dhriti; Park, Kyoungweon; Jespersen, Michael; Qualley, Anthony; Mirau, Peter; Drummy, Lawrence F.; Vaia, Richard A.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Vaia, RA (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM richard.vaia@us.af.mil
FU Air Force Office of Scientific Research (AFOSR); Air Force Research
Laboratory's Materials and Manufacturing Directorate
FX The authors acknowledge the support of this research by the Air Force
Office of Scientific Research (AFOSR) and the Air Force Research
Laboratory's Materials and Manufacturing Directorate and express
appreciation to Elizabeth Moore and Timothy Prusnik for help with Raman
experiments.
NR 56
TC 18
Z9 18
U1 29
U2 106
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0897-4756
EI 1520-5002
J9 CHEM MATER
JI Chem. Mat.
PD JAN 12
PY 2016
VL 28
IS 1
BP 337
EP 348
DI 10.1021/acs.chemmater.5b04224
PG 12
WC Chemistry, Physical; Materials Science, Multidisciplinary
SC Chemistry; Materials Science
GA DB2FB
UT WOS:000368322600042
ER
PT J
AU Ariyawansa, G
Reyner, CJ
Steenbergen, EH
Duran, JM
Reding, JD
Scheihing, JE
Bourassa, HR
Liang, BL
Huffaker, DL
AF Ariyawansa, Gamini
Reyner, Charles J.
Steenbergen, Elizabeth H.
Duran, Joshua M.
Reding, Joshua D.
Scheihing, John E.
Bourassa, Henry R.
Liang, Baolai L.
Huffaker, Diana L.
TI InGaAs/InAsSb strained layer superlattices for mid-wave infrared
detectors
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID INTERFACES; ALLOYS
AB Investigation of growth and properties of InGaAs/InAsSb strained layer superlattices, identified as ternary strained layer superlattices (ternary SLSs), is reported. The material space for the antimony-based SLS detector development is expanded beyond InAs/InAsSb and InAs/(In) GaSb by incorporating Ga into InAs. It was found that this not only provides support for strain compensation but also enhances the infrared (IR) absorption properties. A unique InGaAs/InAsSb SLS exists when the conduction band of InGaAs aligns with that of InAsSb. The bandgap of this specific InGaAs/InAsSb SLS can then be tuned by adjusting the thickness of both constituents. Due to the enhanced electron-hole wavefunction overlap, a significant increase in the absorption coefficient was theoretically predicted for ternary SLS as compared to current state-of-the-art InAs/InAsSb SLS structures, and an approximately 30%-35% increase in the absorption coefficient was experimentally observed. All the samples examined in this work were designed to have the same bandgap of approximately 0.240 eV (5.6 mu m) at 150 K. (C) 2016 AIP Publishing LLC.
C1 [Ariyawansa, Gamini; Reyner, Charles J.; Steenbergen, Elizabeth H.; Duran, Joshua M.; Reding, Joshua D.; Scheihing, John E.] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Bourassa, Henry R.] Univ Dayton, Dept Phys, Dayton, OH 45469 USA.
[Liang, Baolai L.; Huffaker, Diana L.] Univ Calif Los Angeles, Calif NanoSyst Inst, Los Angeles, CA 90095 USA.
RP Ariyawansa, G (reprint author), US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
EM gamini.ariyawansa.2@us.af.mil
FU Air Force Research Laboratory, Sensors Directorate under Project "III-V
Focal Plane Array Development Using Novel Superlattices"
FX This work was funded by the Air Force Research Laboratory, Sensors
Directorate under Project "III-V Focal Plane Array Development Using
Novel Superlattices." The authors would like to acknowledge the
contributions from the scientists/engineers at the Naval Research
Laboratory (NRL) by providing us with the NRL Bands TM software which
was critical for the design/modeling portion of this paper.
NR 30
TC 4
Z9 4
U1 7
U2 34
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JAN 11
PY 2016
VL 108
IS 2
AR 022106
DI 10.1063/1.4939904
PG 5
WC Physics, Applied
SC Physics
GA DD9PQ
UT WOS:000370258400026
ER
PT J
AU Ongstad, AP
Guy, M
Chavez, JR
AF Ongstad, Andrew P.
Guy, Matthew
Chavez, Joeseph R.
TI High power Nd:YAG spinning disk laser
SO OPTICS EXPRESS
LA English
DT Article
ID SOLID-STATE LASERS
AB We report on a high power Nd:YAG spinning disk laser. The eight cm diameter disk generated 200 W CW output with 323 W of absorbed pump in a near diffraction-limited beam. The power conversion efficiency was 64%. The pulsed result, 5 ms pulses at 10 Hz PRF, was nearly identical to the CW result indicating good thermal management. Rotated at 1200-1800 RPM with He impingement cooling the disk temperature increased by only 17 degrees C reaching a maximum temperature of similar to 31 degrees C. The thermal dissipation per unit of output power was 0.61 watt of heat generated per watt of laser output, which is below the typical range of 0.8-1.1 for 808 nm diode pumped Nd:YAG lasers. (C) 2016 Optical Society of America
C1 [Ongstad, Andrew P.; Guy, Matthew; Chavez, Joeseph R.] Air Force Res Lab, Kirtland AFB, NM 87117 USA.
RP Ongstad, AP (reprint author), Air Force Res Lab, 3550 Aberdeen Ave, Kirtland AFB, NM 87117 USA.
EM andrew.ongstad@us.af.mil; matthew.guy.2@us.af.mil;
joeseph.chavez.5.ctr@us.af.mil
NR 10
TC 2
Z9 2
U1 5
U2 14
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1094-4087
J9 OPT EXPRESS
JI Opt. Express
PD JAN 11
PY 2016
VL 24
IS 1
BP 108
EP 113
DI 10.1364/OE.24.000108
PG 6
WC Optics
SC Optics
GA DA7SQ
UT WOS:000368004800011
PM 26832242
ER
PT J
AU Joubert, T
Castro, D
Slane, P
Gelfand, J
AF Joubert, Timothy
Castro, Daniel
Slane, Patrick
Gelfand, Joseph
TI FERMI-LAT OBSERVATIONS OF SUPERNOVA REMNANT G5.7-0.1, BELIEVED TO BE
INTERACTING WITH MOLECULAR CLOUDS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE acceleration of particles; cosmic rays; gamma rays: ISM; ISM: individual
objects (G5.7-0.1); ISM: supernova remnants
ID GAMMA-RAY EMISSION; LARGE-AREA TELESCOPE; HIGH-ENERGY; 1720 MHZ; SHOCK
ACCELERATION; MASER EMISSION; INNER GALAXY; BROAD-BAND; OH MASERS; IC
443
AB This work reports on the detection of gamma-ray emission coincident with the supernova remnant (SNR) G5.7-0.1 using data collected by the Large Area Telescope on board the Fermi Gamma-ray Space Telescope. The SNR is believed to be interacting with molecular clouds, based on 1720 MHz hydroxyl (OH) maser emission observations in its direction. This interaction is expected to provide targets for the production of gamma-ray emission from pi(0)-decay. A gamma-ray source was observed in the direction of SNR G5.7-0.1, positioned near the bright gamma-ray source SNR W28. We model the emission from radio to gamma-ray energies using a one-zone model. Following consideration of both pi(0)-decay and leptonically dominated emission scenarios for the MeV-TeV source, we conclude that a considerable component of the gamma-ray emission must originate from the pi(0)-decay channel. Finally, constraints were placed on the reported ambiguity of the SNR distance through X-ray column density measurements made using XMM-Newton observations. We conclude G5.7-0.1 is a significant gamma-ray source positioned at a distance of similar to 3 kpc with luminosity in the 0.1-100 GeV range of L-gamma approximate to 7.4 x 10(34) erg s(-1).
C1 [Joubert, Timothy; Slane, Patrick] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Joubert, Timothy] Student Squadron, Laughlin AFB, TX 78843 USA.
[Castro, Daniel] MIT, Kavli Ctr Astrophys & Space Res, Cambridge, MA 02139 USA.
[Gelfand, Joseph] NYU Abu Dhabi, Abu Dhabi, U Arab Emirates.
RP Joubert, T (reprint author), Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA.
OI Gelfand, Joseph/0000-0003-4679-1058
FU National Aeronautics and Space Administration through the Smithsonian
Astrophysical Observatory [SV3-73016]; NASA [NAS8-03060]; National
Aeronautics Space Administration [NAS8-03060, NNX13AD56G]
FX D.C. acknowledges support for this work provided by the National
Aeronautics and Space Administration through the Smithsonian
Astrophysical Observatory contract SV3-73016 to MIT for Support of the
Chandra X-Ray Center, which is operated by the Smithsonian Astrophysical
Observatory for and on behalf of the National Aeronautics Space
Administration under contract NAS8-03060. P. S. acknowledges support
from NASA Contract NAS8-03060. J.D.G. acknowledges support for analysis
of the XMM-Newton data through the National Aeronautics Space
Administration under grant NNX13AD56G. The authors would also like to
thank the helpful comments of the referee.
NR 53
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U1 0
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
EI 1538-4357
J9 ASTROPHYS J
JI Astrophys. J.
PD JAN 10
PY 2016
VL 816
IS 2
AR 63
DI 10.3847/0004-637X/816/2/63
PG 9
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA DB0ZV
UT WOS:000368238500015
ER
PT J
AU Nan, TX
Emori, S
Peng, B
Wang, XJ
Hu, ZQ
Xie, L
Gao, Y
Lin, H
Jiao, J
Luo, HS
Budil, D
Jones, JG
Howe, BM
Brown, GJ
Liu, M
Sun, NA
AF Nan, Tianxiang
Emori, Satoru
Peng, Bin
Wang, Xinjun
Hu, Zhongqiang
Xie, Li
Gao, Yuan
Lin, Hwaider
Jiao, Jie
Luo, Haosu
Budil, David
Jones, John G.
Howe, Brandon M.
Brown, Gail J.
Liu, Ming
Sun, Nian
TI Control of magnetic relaxation by electric-field-induced ferroelectric
phase transition and inhomogeneous domain switching
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID MAGNETOELECTRIC DEVICES; ROOM-TEMPERATURE; ATOMIC LAYERS; VOLTAGE;
MULTIFERROICS; RESONANCE; MEMORY; FILMS
AB Electric-field modulation of magnetism in strain-mediated multiferroic heterostructures is considered a promising scheme for enabling memory and magnetic microwave devices with ultralow power consumption. However, it is not well understood how electric-field-induced strain influences magnetic relaxation, an important physical process for device applications. Here, we investigate resonant magnetization dynamics in ferromagnet/ferroelectric multiferroic heterostructures, FeGaB/PMN-PT and NiFe/PMN-PT, in two distinct strain states provided by electric-field-induced ferroelectric phase transition. The strain not only modifies magnetic anisotropy but also magnetic relaxation. In FeGaB/PMN-PT, we observe a nearly two-fold change in intrinsic Gilbert damping by electric field, which is attributed to strain-induced tuning of spin-orbit coupling. By contrast, a small but measurable change in extrinsic linewidth broadening is attributed to inhomogeneous ferroelastic domain switching during the phase transition of the PMN-PT substrate. (C) 2016 AIP Publishing LLC.
C1 [Nan, Tianxiang; Emori, Satoru; Wang, Xinjun; Hu, Zhongqiang; Xie, Li; Gao, Yuan; Lin, Hwaider; Sun, Nian] Northeastern Univ, Dept Elect & Comp Engn, Boston, MA 02115 USA.
[Peng, Bin; Liu, Ming] Xi An Jiao Tong Univ, Elect Mat Res Lab, Xian 710049, Peoples R China.
[Jiao, Jie; Luo, Haosu] Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 201800, Peoples R China.
[Budil, David] Northeastern Univ, Dept Chem, Boston, MA 02115 USA.
[Jones, John G.; Howe, Brandon M.; Brown, Gail J.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Liu, M (reprint author), Xi An Jiao Tong Univ, Elect Mat Res Lab, Xian 710049, Peoples R China.
EM mingliu@mail.xjtu.edu.cn; n.sun@neu.edu
RI Nan, Tianxiang/A-8020-2016; Sun, Nian Xiang/F-9590-2010; Gao,
Yuan/E-4277-2016; Liu, Ming/B-4143-2009; Peng, Bin/D-6585-2015;
OI Sun, Nian Xiang/0000-0002-3120-0094; Gao, Yuan/0000-0002-2444-1180; Liu,
Ming/0000-0002-6310-948X; Peng, Bin/0000-0002-3501-722X; Hu,
Zhongqiang/0000-0002-7534-0427
FU National Science Foundation [1160504]; NSF Nanosystems Engineering
Research Center for Translational Applications of Nanoscale Multiferroic
Systems TANMS; W.M. Keck Foundation; Air Force Research Laboratory
[FA8650-14-C-5706, FA8650-14-C-5705]
FX This work was supported by the National Science Foundation Award
1160504, NSF Nanosystems Engineering Research Center for Translational
Applications of Nanoscale Multiferroic Systems TANMS, the W.M. Keck
Foundation, and the Air Force Research Laboratory through Contract No.
FA8650-14-C-5706 and in part by FA8650-14-C-5705.
NR 46
TC 3
Z9 3
U1 12
U2 37
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JAN 4
PY 2016
VL 108
IS 1
AR 012406
DI 10.1063/1.4939441
PG 5
WC Physics, Applied
SC Physics
GA DJ6HU
UT WOS:000374313000040
ER
PT J
AU Iurov, A
Gumbs, G
Huang, DH
Silkin, VM
AF Iurov, Andrii
Gumbs, Godfrey
Huang, Danhong
Silkin, V. M.
TI Plasmon dissipation in gapped graphene open systems at finite
temperature
SO PHYSICAL REVIEW B
LA English
DT Article
AB Numerical and closed-form analytic expressions for plasmon dispersion relations and rates of dissipation are first obtained at finite temperatures for free-standing gapped graphene. These closed-system results are generalized to an open system with Coulomb coupling of graphene electrons to an external electron reservoir. Plasmon modes, as well as plasmon dissipation channels, are found in this open system, including significant modifications arising from the combined effect of thermal excitation of electrons and an energy band gap in gapped graphene. Moreover, the characteristics of the plasmon mode and the additional plasmon dissipation may be fully controlled by adjusting the separation between the graphene layer from the surface of a thick conductor. Numerical results for the thermal shift of plasmon frequency in a doped gapped graphene layer, along with its sensitivity to the local environment, are demonstrated and analyzed. Such phenomenon associated with the frequency shift of plasmons may be applied to direct optical measurement of local electron temperature in transistors and nanoplasmonic structures.
C1 [Iurov, Andrii; Huang, Danhong] Univ New Mexico, Ctr High Technol Mat, Albuquerque, NM 87106 USA.
[Gumbs, Godfrey] CUNY Hunter Coll, Dept Phys & Astron, New York, NY 10065 USA.
[Gumbs, Godfrey; Silkin, V. M.] Donostia Int Phys Ctr DIPC, San Sebastian 20018, Basque Country, Spain.
[Huang, Danhong] Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
RP Iurov, A (reprint author), Univ New Mexico, Ctr High Technol Mat, Albuquerque, NM 87106 USA.
EM aiurov@chtm.unm.edu
RI DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Silkin,
Vyacheslav/G-5446-2011
OI Silkin, Vyacheslav/0000-0002-7840-3868
FU AFRL [FA 9453-13-1-0284]; Air Force Office of Scientific Research
(AFOSR)
FX A.I. was supported by FA 9453-13-1-0284 grant of AFRL. D.H. would like
to thank the support from the Air Force Office of Scientific Research
(AFOSR).
NR 57
TC 2
Z9 2
U1 5
U2 12
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
EI 1550-235X
J9 PHYS REV B
JI Phys. Rev. B
PD JAN 4
PY 2016
VL 93
IS 3
AR 035404
DI 10.1103/PhysRevB.93.035404
PG 11
WC Physics, Condensed Matter
SC Physics
GA DA2YP
UT WOS:000367663400008
ER
PT J
AU Grabinski, C
Sharma, M
Maurer, E
Sulentic, C
Sankaran, RM
Hussain, S
AF Grabinski, Christin
Sharma, Monita
Maurer, Elizabeth
Sulentic, Courtney
Sankaran, R. Mohan
Hussain, Saber
TI The effect of shear flow on nanoparticle agglomeration and deposition in
in vitro dynamic flow models
SO NANOTOXICOLOGY
LA English
DT Article
DE Agglomerate density; dosimetry; exposure methods; nanoparticle transport
ID GOLD NANOPARTICLES; ENGINEERED NANOMATERIALS; PROTEIN ADSORPTION;
CELLULAR UPTAKE; TOXICITY; DOSIMETRY; SIZE; CELLS; FLUID; PARTICLES
AB Traditional in vitro toxicity experiments typically involve exposure of a mono- or co-culture of cells to nanoparticles (NPs) in static conditions with the assumption of 100% deposition (i.e. dose) of well-dispersed particles. However, cellular dose can be affected by agglomeration and the unique transport kinetics of NPs in biological media. We hypothesize that shear flow can address these issues and achieve more predictable dosage. Here, we compare the behavior of gold NPs with diameters of 5, 10 and 30nm in static and dynamic in vitro models. We also utilize transport modeling to approximate the shear rate experienced by the cells in dynamic conditions to evaluate physiological relevance. The transport kinetics show that NP behavior is governed by both gravity and diffusion forces in static conditions and only diffusion in dynamic conditions. Our results reveal that dynamic systems are capable of producing a more predictable dose compared to static systems, which has strong implications for improving repeatability in nanotoxicity assessments.
C1 [Grabinski, Christin; Sharma, Monita; Maurer, Elizabeth; Hussain, Saber] Air Force Res Lab, Mol Bioeffects Branch, Wright Patterson AFB, OH 45433 USA.
[Grabinski, Christin; Sankaran, R. Mohan] Case Western Reserve Univ, Dept Chem Engn, Cleveland, OH 44106 USA.
[Sharma, Monita; Sulentic, Courtney; Hussain, Saber] Wright State Univ, Boonshoft Sch Med, Dept Pharmacol & Toxicol, Dayton, OH 45435 USA.
RP Hussain, S (reprint author), Air Force Res Lab, 2729 R St, Wright Patterson AFB, OH 45433 USA.
EM saber.hussain@us.af.mil
FU Molecular Bioeffects Branch, Bioeffects Division, Human Effectiveness
Directorate, 711 Human Performance Wing, Air Force Research Laboratory
under the Student Research Participation Program at the U.S. Air Force
Research Laboratory
FX The authors report no conflicts of interest. This work was funded by the
Molecular Bioeffects Branch, Bioeffects Division, Human Effectiveness
Directorate, 711 Human Performance Wing, Air Force Research Laboratory
under the Student Research Participation Program at the U.S. Air Force
Research Laboratory administered by the Oak Ridge Institute for Science
and Education (to C.M.G. and M.S.).
NR 54
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U1 8
U2 11
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1743-5390
EI 1743-5404
J9 NANOTOXICOLOGY
JI Nanotoxicology
PD JAN 2
PY 2016
VL 10
IS 1
BP 74
EP 83
DI 10.3109/17435390.2015.1018978
PG 10
WC Nanoscience & Nanotechnology; Toxicology
SC Science & Technology - Other Topics; Toxicology
GA DG1FL
UT WOS:000371810900008
PM 25961858
ER
PT J
AU Ralston, TE
Kanzler, KE
AF Ralston, Timothy E.
Kanzler, Kathryn E.
TI Symptom Discrimination and Habituation: A Case Study of Behavioral
Treatment for Postural Orthostatic Tachycardia Syndrome (POTS)
SO BEHAVIORAL MEDICINE
LA English
DT Article
DE case study; exposure therapy; health psychology; POTS
ID DISORDER; ANXIETY
AB Postural orthostatic tachycardia syndrome (POTS) is a multifaceted disorder of the autonomic nervous system that profoundly impacts physical functioning. In addition to physical consequences, many patients develop situational anxiety that causes reduced activity level, which may impede functional recovery from POTS. Despite links with anxiety, to date there have been no reports of psychological intervention for POTS. Here we report a case study of POTS in a 40-year-old female serving on active duty in the US military. Because there are no established guidelines for the psychological treatment of POTS, intervention techniques were adapted for use with the patient. Elements of cognitive behavioral therapy, including in-vivo exposure and symptom discrimination, were used to target avoidance of feared situations. Over the course of treatment, the patient learned to discriminate her POTS symptoms from anxiety and displayed a significant decrease in POTS-related functional impairment. Implications for future care are discussed.
C1 [Ralston, Timothy E.] Mental Hlth Clin, 194 Missile Ave, Minot Afb, ND 58705 USA.
[Kanzler, Kathryn E.] Malcolm Grow Med Clin & Surg Ctr, Clin Hlth Psychol Clin, Joint Base Andrews, MD USA.
RP Ralston, TE (reprint author), Mental Hlth Clin, 194 Missile Ave, Minot Afb, ND 58705 USA.; Ralston, TE (reprint author), Mental Hlth Clin, Chief, Minot Air Force Base, Minot AFB, ND USA.
EM timothy.ralston.2@us.af.mil
NR 16
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U1 1
U2 3
PU ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXFORDSHIRE, ENGLAND
SN 0896-4289
EI 1940-4026
J9 BEHAV MED
JI Behav. Med.
PD JAN 2
PY 2016
VL 42
IS 1
BP 57
EP 62
DI 10.1080/08964289.2014.977765
PG 6
WC Behavioral Sciences; Psychiatry
SC Behavioral Sciences; Psychiatry
GA DC5YI
UT WOS:000369296200007
PM 25337949
ER
PT S
AU Bauer, W
Perram, G
Haugan, T
AF Bauer, William
Perram, Glen
Haugan, Timothy
BE Exarhos, GJ
Gruzdev, VE
Menapace, JA
Ristau, D
Soileau, MJ
TI Plume dynamics from UV pulsed ablation of Al and Ti
SO LASER-INDUCED DAMAGE IN OPTICAL MATERIALS 2016
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT 48th SPIE Annual Laser Damage Symposium on Optical Materials for
High-Power Lasers
CY SEP 25-28, 2015
CL Boulder, CO
SP SPIE, Laser Components GmbH, Spica Technologies Inc, ZC Optoelectron Technologies Ltd
DE pulsed laser ablation; Al; Ti; fast ICCD imaging; visible emissions
spectroscopy
ID LASER; ALUMINUM; PLASMA
AB Pulsed laser ablation of Al and Ti with a < 3.3 J/cm(2) KrF laser and Ar background pressure of up to 1 Ton was performed to study the ablated plume. Mass loss experiments revealed the number of ablated atoms per pulse increases by similar to 30% for Ti and similar to 20% for Al as pressure decreases from 1 Ton to vacuum. Optical emission imaging performed using a gated ICCD revealed a strong dependence of shock front parameters, defined by the Sedov-Taylor blast and classical drag models, on background pressure. Spatially resolved optical emission spectroscopy from Al I, Al II, Ti I, and Ti II revealed ion temperatures of 10(4) K that decreased away from the target surface along the surface normal and neutral temperatures of 10(3) K independent of target distance. Comparison between kinetic energy in the shock and internal excitation energy reveals that nearly 100% of the energy is partitioned into shock front kinetic energy and similar to 1% into internal excitation.
C1 [Bauer, William; Perram, Glen] Air Force Inst Technol, Dept Engn Phys, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
[Haugan, Timothy] US Air Force, Res Lab, Aerosp Syst Directorate, 1950 Fifth St Bldg 18, Wright Patterson AFB, OH 45433 USA.
RP Perram, G (reprint author), Air Force Inst Technol, Dept Engn Phys, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM glen.perram@afit.edu
FU High Energy Laser Joint Technology Office; Air Force Research Laboratory
FX This work was funded in part by a grant from the High Energy Laser Joint
Technology Office and by the Air Force Research Laboratory.
NR 9
TC 0
Z9 0
U1 0
U2 0
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-1-5106-0437-7
J9 PROC SPIE
PY 2016
VL 10014
AR UNSP 100140S
DI 10.1117/12.2245185
PG 11
WC Optics; Physics, Applied
SC Optics; Physics
GA BH0BA
UT WOS:000394528400016
ER
PT S
AU Singh, PK
Aizin, G
Thawdar, N
Medley, M
Jornet, JM
AF Singh, Prateek K.
Aizin, Gregory
Thawdar, Ngwe
Medley, Michael
Jornet, Josep Miquel
GP IEEE
TI Graphene-based Plasmonic Phase Modulator for Terahertz-band
Communication
SO 2016 10TH EUROPEAN CONFERENCE ON ANTENNAS AND PROPAGATION (EUCAP)
SE Proceedings of the European Conference on Antennas and Propagation
LA English
DT Proceedings Paper
CT 10th European Conference on Antennas and Propagation (EuCAP)
CY APR 10-15, 2016
CL Davos, SWITZERLAND
DE Phase Modulation; Graphene; Plasmonics; Terahertz Band
ID WIRELESS COMMUNICATIONS; SYSTEMS; WAVES
AB In this paper, a graphene-based plasmonic phase modulator for Terahertz band (0.1-10 THz) communication is proposed, modeled and analyzed. The modulator is based on a fixed-length graphene-based plasmonic waveguide, and leverages the possibility to tune the propagation speed of Surface Plasmon Polariton (SPP) waves on graphene by modifying the Fermi energy of the graphene layer. An analytical model for the modulator is developed starting from the dynamic complex conductivity of graphene and a revised dispersion equation for SPP waves in gated graphene structures. By utilizing the model, the performance of the modulator is analyzed in terms of symbol error rate when utilized to implement a M-ary digital phase shift keying modulation. The model is validated by means of electromagnetic simulations, and numerical results are provided to illustrate the performance of the modulator.
C1 [Singh, Prateek K.; Jornet, Josep Miquel] SUNY Buffalo, Dept Elect Engn, Buffalo, NY 14260 USA.
[Aizin, Gregory] Kingsborough Community Coll, Dept Phys Sci, Brooklyn, NY 11235 USA.
[Thawdar, Ngwe; Medley, Michael] US Air Force, Res Lab, RITE, Rome, NY 13441 USA.
RP Singh, PK (reprint author), SUNY Buffalo, Dept Elect Engn, Buffalo, NY 14260 USA.
EM prateekk@buffalo.edu; gregory.aizin@kbcc.cuny.edu;
ngwe.thawdar@us.af.mil; michael.medley@us.af.mil; jmjornet@buffalo.edu
FU U.S. Government; AFRL, under AFRL Grant [FA8750-15-1-0050]
FX (a) The State University of New York at Buffalo acknowledges the U.S.
Government's support in the publication of this paper. This material is
based upon work funded by AFRL, under AFRL Grant No. FA8750-15-1-0050.
(b) Any opinions, findings and conclusions or recommendations expressed
in this material are those of the author(s) and do not necessarily
reflect the views of AFRL.
NR 21
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Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2164-3342
BN 978-8-8907-0186-3
J9 PROC EUR CONF ANTENN
PY 2016
PG 5
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BG3XP
UT WOS:000388372500120
ER
PT S
AU Jain, N
Hencey, BM
AF Jain, Neera
Hencey, Brandon M.
GP IEEE
TI Increasing Fuel Thermal Management System Capability via Objective
Function Design
SO 2016 AMERICAN CONTROL CONFERENCE (ACC)
SE Proceedings of the American Control Conference
LA English
DT Proceedings Paper
CT American Control Conference (ACC)
CY JUL 06-08, 2016
CL Boston, MA
SP Amer Automat Control Council
ID MODEL
AB The drive to extract greater capability from increasingly complex and constrained energy systems has led to a need for systematically specifying and synthesizing desirable control strategies. The heuristic control design scales poorly with system complexity, and there is a lack of connection to quantifiable and verifiable requirements. Similarly, objective functions used in optimal control often use generic quadratic objective functions instead of objective functions inspired by the systems' fundamental properties. As a result, this can create a large tuning problem involving the penalties for many states and inputs. This paper investigates objective functions inspired by thermodynamics as a starting point for control design of an aircraft's fuel thermal management system.
C1 [Jain, Neera] Purdue Univ, Sch Mech Engn, W Lafayette, IN 47906 USA.
[Hencey, Brandon M.] US Air Force, Res Lab, Dayton, OH 45435 USA.
RP Jain, N (reprint author), Purdue Univ, Sch Mech Engn, W Lafayette, IN 47906 USA.
EM neerajain@purdue.edu; brandon.hencey@us.af.mil
NR 34
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0743-1619
BN 978-1-4673-8682-1
J9 P AMER CONTR CONF
PY 2016
BP 549
EP 556
PG 8
WC Automation & Control Systems
SC Automation & Control Systems
GA BG3XW
UT WOS:000388376100090
ER
PT S
AU Williams, MA
Alleyne, AG
Hencey, BM
AF Williams, Matthew A.
Alleyne, Andrew G.
Hencey, Brandon M.
GP IEEE
TI Hybrid Model Predictive Control of Multi-Compressor Vapor Compression
Systems
SO 2016 AMERICAN CONTROL CONFERENCE (ACC)
SE Proceedings of the American Control Conference
LA English
DT Proceedings Paper
CT American Control Conference (ACC)
CY JUL 06-08, 2016
CL Boston, MA
SP Amer Automat Control Council
ID MANAGEMENT
AB Increasing thermal loads in air vehicles has recently driven a need for more efficient cooling mechanisms and novel control techniques. As such, multi-compressor vapor compression systems are being considered for next generation aircraft to help mitigate the effects of large magnitude and highly transient thermal loads. The inclusion of these systems coupled with the transient environment in which they operate leads to the need for advanced control techniques to select operational modes and handle continuous actuation. This work develops a switched linear model framework that is used in a hybrid model predictive controller to determine the operational mode of the system, and continuous actuator set points. While this approach is applicable to a wide range of systems, a sample aircraft simulation study shows the advantage of the predictive controller over current logic-based control strategies.
C1 [Williams, Matthew A.; Alleyne, Andrew G.] Univ Illinois, Dept Mech Sci & Engn, Urbana, IL 61801 USA.
[Hencey, Brandon M.] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Williams, MA (reprint author), Univ Illinois, Dept Mech Sci & Engn, Urbana, IL 61801 USA.
EM mwillms4@illinois.edu; alleyne@illinois.edu; brandon.hencey@us.af.mil
FU Air Force Research Laboratory [88ABW-2015-4387]; National Science
Foundation Graduate Research Fellowship Program [DGE-1144245]; National
Science Foundation Engineering Research Center for Power Optimization of
Electro-Thermal Systems (POETS) [EEC-1449548]
FX Research supported by the Air Force Research Laboratory (approved for
release under case #: 88ABW-2015-4387), National Science Foundation
Graduate Research Fellowship Program under Grant No. DGE-1144245, and
the National Science Foundation Engineering Research Center for Power
Optimization of Electro-Thermal Systems (POETS) with cooperative
agreement EEC-1449548.
NR 25
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0743-1619
BN 978-1-4673-8682-1
J9 P AMER CONTR CONF
PY 2016
BP 563
EP 568
PG 6
WC Automation & Control Systems
SC Automation & Control Systems
GA BG3XW
UT WOS:000388376100092
ER
PT S
AU Pollock, DT
Williams, MA
Hencey, BM
AF Pollock, Daniel T.
Williams, Matthew A.
Hencey, Brandon M.
GP IEEE
TI Model Predictive Control of Temperature-Sensitive and Transient Loads in
Aircraft Vapor Compression Systems
SO 2016 AMERICAN CONTROL CONFERENCE (ACC)
SE Proceedings of the American Control Conference
LA English
DT Proceedings Paper
CT American Control Conference (ACC)
CY JUL 06-08, 2016
CL Boston, MA
SP Amer Automat Control Council
ID CYCLE
AB Challenges for next generation aircraft thermal management using vapor compression systems (VCS) include larger transient thermal loads, tighter temperature constraints, and increasingly strict power and sizing requirements. Conventional control approaches, such as proportional-integral (PI) control, are well-suited for steady-state operation without system constraints. In this work, we investigate the ability of model predictive control to enable larger transient thermal loads subject to tighter temperature limits through anticipation and load-shedding. Our results include (1) a linear model predictive control validated on a nonlinear model of the vapor compression system, and (2) direct comparisons to state-of-theart PI control for stressing scenarios.
C1 [Pollock, Daniel T.] Rensselaer Polytech Inst, Mech Aerosp & Nucl Engn Dept, Troy, NY 12180 USA.
[Williams, Matthew A.] Univ Illinois, Dept Mech Sci & Engn, Urbana, IL 61801 USA.
[Hencey, Brandon M.] US Air Force, Res Lab, Dayton, OH 45435 USA.
RP Pollock, DT (reprint author), Rensselaer Polytech Inst, Mech Aerosp & Nucl Engn Dept, Troy, NY 12180 USA.
EM pollod@rpi.edu; mwillms4@illinois.edu; brandon.hencey@us.af.mil
FU United States Air Force Research Laboratory; CLEARED [88ABW-2015-4411]
FX This research was supported by the United States Air Force Research
Laboratory and CLEARED for public release on 18 Sep. 2015, Case Number
88ABW-2015-4411.
NR 20
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0743-1619
BN 978-1-4673-8682-1
J9 P AMER CONTR CONF
PY 2016
BP 575
EP 580
PG 6
WC Automation & Control Systems
SC Automation & Control Systems
GA BG3XW
UT WOS:000388376100094
ER
PT S
AU Ton, C
Kan, Z
Doucette, EA
Curtis, JW
Mehta, SS
AF Ton, C.
Kan, Z.
Doucette, E. A.
Curtis, J. W.
Mehta, S. S.
GP IEEE
TI Leader-Follower Consensus with Unknown Control Direction
SO 2016 AMERICAN CONTROL CONFERENCE (ACC)
SE Proceedings of the American Control Conference
LA English
DT Proceedings Paper
CT American Control Conference (ACC)
CY JUL 06-08, 2016
CL Boston, MA
SP Amer Automat Control Council
ID HIGH-FREQUENCY-GAIN; MULTIROBOT SYSTEMS; NETWORKS; TOPOLOGY; DESIGN;
SIGNS
AB The paper considers leader-follower consensus of multi-agent networks with unknown control direction. Sliding mode control is used to achieve consensus tracking under fixed topology with the assumption that the position of the leader is known to a subset of the followers. The proposed consensus law assumes unknown sign in the control input matrix of the followers and does not require the knowledge of the leader's velocity. Lyapunov-based analysis is presented to show that if the directed graph of the network has a directed spanning tree then sliding mode control law can guarantee consensus tracking. Simulations results are provided to verify the feasibility of the proposed controller.
C1 [Ton, C.] Air Force Res Lab, Natl Res Council, Wright Patterson AFB, OH 45433 USA.
[Doucette, E. A.; Curtis, J. W.] Air Force Res Lab, Munit Directorate, Wright Patterson AFB, OH USA.
[Kan, Z.; Mehta, S. S.] Univ Florida, REEF, Gainesville, FL 32611 USA.
RP Ton, C (reprint author), Air Force Res Lab, Natl Res Council, Wright Patterson AFB, OH 45433 USA.
FU AFRL Mathematical Modeling and Optimization Institute
[FA8651-08-D-0108/042-043-049]
FX This research is supported in part by a grant from the AFRL Mathematical
Modeling and Optimization Institute contracts
#FA8651-08-D-0108/042-043-049. Any opinions, findings and conclusions or
recommendations expressed in this material are those of the author(s)
and do not necessarily reflect the views of the funding agency.
NR 24
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0743-1619
BN 978-1-4673-8682-1
J9 P AMER CONTR CONF
PY 2016
BP 2820
EP 2825
PG 6
WC Automation & Control Systems
SC Automation & Control Systems
GA BG3XW
UT WOS:000388376102144
ER
PT S
AU Peterson, JD
Yucelen, T
Pasiliao, E
AF Peterson, J. Daniel
Yucelen, Tansel
Pasiliao, Eduardo
GP IEEE
TI Generalizations on Active-Passive Dynamic Consensus Filters
SO 2016 AMERICAN CONTROL CONFERENCE (ACC)
SE Proceedings of the American Control Conference
LA English
DT Proceedings Paper
CT American Control Conference (ACC)
CY JUL 06-08, 2016
CL Boston, MA
SP Amer Automat Control Council
AB Active-passive dynamic consensus filters consist of agents subject to local observations of a process of interest (active agents) and agents without any observations (passive agents). In this paper, we introduce a new class of active-passive dynamic consensus filters using results from graph theory and systems science. Specifically, the proposed filters only require agents to exchange their current state information with neighbors in a simple and isotropic manner to reduce the overall information exchange cost of the network. In addition, we allow the roles of active and passive agents to be time-varying for making these filters suitable for a wide range of multiagent systems applications. We show that the proposed active-passive dynamic consensus filters enable the states of all agents to converge to an adjustable neighborhood of the average of the observations sensed by a time-varying set of active agents.
C1 [Peterson, J. Daniel; Yucelen, Tansel] Missouri Univ Sci & Technol, Mech & Aerosp Engn Dept, Rolla, MO 65409 USA.
[Peterson, J. Daniel; Yucelen, Tansel] Missouri Univ Sci & Technol, Adv Syst Res Lab, Rolla, MO 65409 USA.
[Pasiliao, Eduardo] US Air Force, Res Lab, Munit Directorate, Eglin AFB, FL 32542 USA.
RP Peterson, JD (reprint author), Missouri Univ Sci & Technol, Mech & Aerosp Engn Dept, Rolla, MO 65409 USA.; Peterson, JD (reprint author), Missouri Univ Sci & Technol, Adv Syst Res Lab, Rolla, MO 65409 USA.
EM jdp6q5@mst.edu; yucelen@mst.edu; pasiliao@eglin.af.mil
FU United States Air Force Summer Faculty and Student Fellowship Program;
Intelligent Systems Center of the Missouri University of Science and
Technology
FX This research was supported in part by the United States Air Force
Summer Faculty and Student Fellowship Program and by the Intelligent
Systems Center of the Missouri University of Science and Technology.
NR 15
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0743-1619
BN 978-1-4673-8682-1
J9 P AMER CONTR CONF
PY 2016
BP 3740
EP 3745
PG 6
WC Automation & Control Systems
SC Automation & Control Systems
GA BG3XW
UT WOS:000388376103130
ER
PT S
AU Manyam, SG
Casbeer, DW
Sundar, K
AF Manyam, Satyanarayana G.
Casbeer, David W.
Sundar, Kaarthik
GP IEEE
TI Path Planning for Cooperative Routing of Air-Ground Vehicles
SO 2016 AMERICAN CONTROL CONFERENCE (ACC)
SE Proceedings of the American Control Conference
LA English
DT Proceedings Paper
CT American Control Conference (ACC)
CY JUL 06-08, 2016
CL Boston, MA
SP Amer Automat Control Council
ID RING-STAR PROBLEM; NETWORK; ALGORITHM; DESIGN
AB We consider a cooperative vehicle routing problem for surveillance and reconnaissance missions with communication constraints between the vehicles. We propose a framework which involves a ground vehicle and an aerial vehicle; the vehicles travel cooperatively satisfying the communication limits, and visit a set of targets. We present a mixed integer linear programming (MILP) formulation and develop a branch- and cut algorithm to solve the path planning problem for the ground and air vehicles. The effectiveness of the proposed approach is corroborated through extensive computational experiments on several randomly generated instances.
C1 [Manyam, Satyanarayana G.] US Air Force, Res Lab, Dayton, OH 45433 USA.
[Casbeer, David W.] US Air Force, Res Lab, Control Sci Ctr Excellence, Wright Patterson AFB, OH 45433 USA.
[Sundar, Kaarthik] Texas A&M Univ, Dept Mech Engn, College Stn, TX 77843 USA.
RP Manyam, SG (reprint author), US Air Force, Res Lab, Dayton, OH 45433 USA.
EM msngupta@gmail.com; david.casbeer@us.af.mil
NR 35
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0743-1619
BN 978-1-4673-8682-1
J9 P AMER CONTR CONF
PY 2016
BP 4630
EP 4635
PG 6
WC Automation & Control Systems
SC Automation & Control Systems
GA BG3XW
UT WOS:000388376104114
ER
PT S
AU Kan, Z
Shea, JM
Doucette, EA
Curtis, JW
Dixon, WE
AF Kan, Zhen
Shea, John M.
Doucette, Emily A.
Curtis, Jess W.
Dixon, Warren E.
GP IEEE
TI Coverage Control Based Effective Jamming Strategy for Wireless Networks
SO 2016 AMERICAN CONTROL CONFERENCE (ACC)
SE Proceedings of the American Control Conference
LA English
DT Proceedings Paper
CT American Control Conference (ACC)
CY JUL 06-08, 2016
CL Boston, MA
SP Amer Automat Control Council
ID MOBILE SENSOR NETWORKS; FORMATION RECONFIGURATION; CONNECTIVITY
MAINTENANCE; COLLISION-AVOIDANCE
AB A group of mobile jammers is tasked with disrupting the overall communication of a static radio network. The jammers are assumed to have limited jamming capabilities, such that the jamming effect is constrained to a disk area around the jammer. Radios within the jamming zone will be disrupted and the jamming intensity depends on the relative distance between the radio and the jammer. To disrupt the communication network, a dynamic coverage control based jamming strategy is developed, where the jammers coordinate their motion and cooperatively guarantee that every radio in the network is accumulatively disrupted up to a desired jamming level over time. It is further assumed that each jammer has a limited communication capability. Two jammers can only share jamming information when they stay within a certain distance. To ensure consistent jamming coordination, motion control laws are developed for jammers to perform effective jamming while preserving network connectivity among jammers. An appealing feature of the current work is the use of mobile jammers to dynamically disrupt the overall communication network, which enables cooperative jamming over large scale networks by using a limited number of mobile jammers.
C1 [Kan, Zhen; Dixon, Warren E.] Univ Florida, Dept Mech & Aerosp Engn, Gainesville, FL 32611 USA.
[Shea, John M.] Univ Florida, Dept Elect & Comp Engn, Gainesville, FL 32611 USA.
[Doucette, Emily A.; Curtis, Jess W.] US Air Force, Res Lab, Eglin AFB, FL 32542 USA.
RP Kan, Z (reprint author), Univ Florida, Dept Mech & Aerosp Engn, Gainesville, FL 32611 USA.
EM kanzhen0322@ufl.edu; jshea@ece.ufl.edu; emily.doucette@us.af.mil;
jess.curtis@us.af.mil; wdixon@ufl.edu
FU NSF [1217908]; Task Order contract; Air Force Research Laboratory,
Munitions Directorate at Eglin AFB
FX This research is supported in part by NSF award numbers 1217908 and a
Task Order contract with the Air Force Research Laboratory, Munitions
Directorate at Eglin AFB. Any opinions, findings and conclusions or
recommendations expressed in this material are those of the authors and
do not necessarily reflect the views of the sponsoring agency.
NR 23
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0743-1619
BN 978-1-4673-8682-1
J9 P AMER CONTR CONF
PY 2016
BP 4655
EP 4660
PG 6
WC Automation & Control Systems
SC Automation & Control Systems
GA BG3XW
UT WOS:000388376104118
ER
PT S
AU Fuchs, ZE
Casbeer, DW
Garcia, E
AF Fuchs, Zachariah E.
Casbeer, David W.
Garcia, Eloy
GP IEEE
TI Singular Analysis of a Multi-Agent, Turn-Constrained, Defensive Game
SO 2016 AMERICAN CONTROL CONFERENCE (ACC)
SE Proceedings of the American Control Conference
LA English
DT Proceedings Paper
CT American Control Conference (ACC)
CY JUL 06-08, 2016
CL Boston, MA
SP Amer Automat Control Council
ID DIFFERENTIAL GAME
AB We examine a two-team, differential game, which models an active target defense scenario. One team represents an attacking force and consists of a single Attacker. The opposing team represents a defensive force consisting of a high-value Target and a mobile Defender. The Attacker strives to get as close to the Target as possible before it is intercepted by the Defender. Conversely, the defensive team attempts to maneuver so that the Defender intercepts the Attacker as far from the Target as possible. The Attacker and Target move with simple motion, while the Defender has a constrained turn rate. We discuss two types of singular surfaces that appear within the equilibrium solution of this game, namely the universal surface and the dispersal surface. Several numerical examples are presented to illustrate the characteristics of the equilibrium solutions that interact with these surfaces.
C1 [Fuchs, Zachariah E.] Wright State Univ, Dept Elect Engn, Dayton, OH 45435 USA.
[Casbeer, David W.; Garcia, Eloy] AFRL, Control Sci Ctr Excellence, Wright Patterson AFB, OH USA.
RP Fuchs, ZE (reprint author), Wright State Univ, Dept Elect Engn, Dayton, OH 45435 USA.
EM zachariah.fuchs@wright.edu; david.casbeer@us.af.mil;
elgarcia@infoscitex.com
NR 21
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0743-1619
BN 978-1-4673-8682-1
J9 P AMER CONTR CONF
PY 2016
BP 4705
EP 4712
PG 8
WC Automation & Control Systems
SC Automation & Control Systems
GA BG3XW
UT WOS:000388376104129
ER
PT S
AU Krishnamoorthy, K
Pachter, M
AF Krishnamoorthy, K.
Pachter, M.
GP IEEE
TI The Role of Prior and Optimal Team Decision in Binary Classification
SO 2016 AMERICAN CONTROL CONFERENCE (ACC)
SE Proceedings of the American Control Conference
LA English
DT Proceedings Paper
CT American Control Conference (ACC)
CY JUL 06-08, 2016
CL Boston, MA
SP Amer Automat Control Council
ID CONDORCET JURY THEOREM; N SYSTEMS SUBJECT; 2 KINDS; HIERARCHIES;
POLYARCHIES; COMMITTEES; FAILURES
AB Optimal team decision making subject to error-prone team members with different capabilities has been studied extensively-particularly in the context of binary classification. The over-arching goal is to correctly classify an object as either being a True Target or a False Target. Each team member comes with pre-specified Type I and II error rates and is asked whether or not he determines the object to be a True Target. Based on the member responses, a collective decision that minimizes the probability of misclassification (or some other suitable metric) is made. This is a widely researched topic, having applications in pattern recognition, organizational decision making, social (dichotomous) choice situations, reliability studies etc.; however, in past work, the obvious connection to information theory is missing. In this work, we establish the optimal team decision rules that minimizes the probability of misclassification, by direct application of Bayesian decision theory. In doing so, we bring out the key role played by the a priori probability (prior) that the object is a True Target. In particular, for a homogeneous team composition, we establish the criteria whence the majority voting scheme is indeed optimal. Whereupon, it immediately follows that the higher the prior, the fewer the number of affirmative votes needed to classify the object as a True Target.
C1 [Krishnamoorthy, K.] Infoscitex Corp, Dayton, OH 45431 USA.
[Pachter, M.] US Air Force, Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.
RP Krishnamoorthy, K (reprint author), Infoscitex Corp, Dayton, OH 45431 USA.
EM krishnak@ucla.edu
NR 13
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0743-1619
BN 978-1-4673-8682-1
J9 P AMER CONTR CONF
PY 2016
BP 4913
EP 4917
PG 5
WC Automation & Control Systems
SC Automation & Control Systems
GA BG3XW
UT WOS:000388376104163
ER
PT S
AU Pham, KD
AF Pham, Khanh D.
GP IEEE
TI Assured Satellite Communications: A Minimal-Cost-Variance System
Controller Paradigm
SO 2016 AMERICAN CONTROL CONFERENCE (ACC)
SE Proceedings of the American Control Conference
LA English
DT Proceedings Paper
CT American Control Conference (ACC)
CY JUL 06-08, 2016
CL Boston, MA
SP Amer Automat Control Council
AB This paper begins to bridge theoretical systems control with satellite communications in fundamental ways. In view of satellite system controllers, quality of service of user terminals needs a radically different perspective to reliably maintain a minimum adaptive link margin to account for link state uncertainties. Special emphasis is therefore given to the cost-variance, discrete-time control theory which enables an effective design for reliability to analyze the behavior of Signal-to-Interference-Plus-Noise Ratio (SINR)-based tracking systems. The work further articulates the use of state estimates for terminal power adjustments supported by discrete Kalman filtering with intermittent blockages. Moreover, the recent assessment of multi-access interference protection recommends that terminal powers should continue to be subject to terminal power control output back-off constraints. Lastly, communication rates for terminal reports from active remote terminals to the satellite ground hub can be optimized by means of the model-based triggering events.
C1 [Pham, Khanh D.] US Air Force, Res Lab, Space Vehicles Directorate, 3550 Aberdeen Ave, Kirtland AFB, NM 87117 USA.
RP Pham, KD (reprint author), US Air Force, Res Lab, Space Vehicles Directorate, 3550 Aberdeen Ave, Kirtland AFB, NM 87117 USA.
EM AFRL.RVSV@kirtland.af.mil
NR 17
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0743-1619
BN 978-1-4673-8682-1
J9 P AMER CONTR CONF
PY 2016
BP 6555
EP 6561
PG 7
WC Automation & Control Systems
SC Automation & Control Systems
GA BG3XW
UT WOS:000388376106101
ER
PT S
AU Marzano, FS
Milani, L
Mattioli, V
Magde, KM
Brost, GA
AF Marzano, Frank S.
Milani, Luca
Mattioli, Vinia
Magde, Kevin M.
Brost, George A.
GP IEEE
TI RETRIEVAL OF PRECIPITATION EXTINCTION USING GROUND-BASED SUN-TRACKING
MILLIMETER-WAVE RADIOMETRY
SO 2016 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT 36th IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 10-15, 2016
CL Beijing, PEOPLES R CHINA
SP Inst Elect & Elect Engineers, Inst Elect & Elect Engineers, Geoscience & Remote Sensing Soc, NSSC
DE Ground-based radiometry; Sun tracking; Path attenuation; Clouds and
precipitation; Millimeter-wave and millimeter-wave frequencies
ID MICROWAVE RADIOMETRY; TEMPERATURE; RAINFALL
AB Sun-tracking millimeter-wave radiometry exploits the Sun as a beacon source by tracking it along its diurnal ecliptic. The atmospheric brightness temperature is measured by alternately pointing toward-the-Sun and off-the-Sun according to ad hoc switching strategy. By properly developing a retrieval algorithm, we can estimate the atmospheric path attenuation in all-weather conditions. The Langley method, based on elevation-scanning, is proposed to estimate the equivalent brightness temperature of the Sun, which is a critical step for precipitation extinction estimation. An application to available Sun-tracking radiometric measurements at V and W band in Rome (NY, USA) is shown, discussed and compared with the conventional technique using the clear-air approximation of the mean radiative temperature. Results show an appealing potential of Sun-tracking technique in order to exploit millimeter-wave radiometry for atmospheric retrievals even in a cloudy and rainy conditions.
C1 [Marzano, Frank S.; Milani, Luca] Sapienza Univ Rome, Rome, Italy.
[Mattioli, Vinia] EUMETSAT, Darmstadt, Germany.
[Magde, Kevin M.; Brost, George A.] US Air Force, Res Lab, Washington, DC USA.
RP Marzano, FS (reprint author), Sapienza Univ Rome, Rome, Italy.
FU Air Force Research Laboratory (Rome, NY, USA) under the EOARD-HiRadProp
project; Sapienza University of Rome, Italy
FX This work has been partially funded by the Air Force Research Laboratory
(Rome, NY, USA) under the EOARD-HiRadProp project and by Sapienza
University of Rome, Italy.
NR 11
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-5090-3332-4
J9 INT GEOSCI REMOTE SE
PY 2016
BP 2162
EP 2165
PG 4
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BG3QG
UT WOS:000388114602071
ER
PT S
AU Humphrey, L
Konighofer, B
Koenighofer, R
Topcu, U
AF Humphrey, Laura
Koenighofer, Bettina
Koenighofer, Robert
Topcu, Ufuk
BE Bloem, R
Arbel, E
TI Synthesis of Admissible Shields
SO HARDWARE AND SOFTWARE: VERIFICATION AND TESTING, HVC 2016
SE Lecture Notes in Computer Science
LA English
DT Proceedings Paper
CT 12th International Haifa Verification Conference (HVC)
CY NOV 14-17, 2016
CL IBM Res Haifa Lab, Haifa, ISRAEL
SP IBM, Cadence Design Syst, Mellanox Technologies, Mentor Graph, Qualcomm, Intel
HO IBM Res Haifa Lab
ID SUPERVISORY CONTROL; INFINITE GAMES
AB Shield synthesis is an approach to enforce a set of safety-critical properties of a reactive system at runtime. A shield monitors the system and corrects any erroneous output values instantaneously. The shield deviates from the given outputs as little as it can and recovers to hand back control to the system as soon as possible. This paper takes its inspiration from a case study on mission planning for unmanned aerial vehicles (UAVs) in which k-stabilizing shields, which guarantee recovery in a finite time, could not be constructed. We introduce the notion of admissible shields, which improves k-stabilizing shields in two ways: (1) whereas k-stabilizing shields take an adversarial view on the system, admissible shields take a collaborative view. That is, if there is no shield that guarantees recovery within k steps regardless of system behavior, the admissible shield will attempt to work with the system to recover as soon as possible. (2) Admissible shields can handle system failures during the recovery phase. In our experimental results we show that for UAVs, we can generate admissible shields, even when k-stabilizing shields do not exist.
C1 [Humphrey, Laura] AFRL, Control Sci Ctr Excellence, Wright Patterson AFB, OH USA.
[Koenighofer, Bettina; Koenighofer, Robert] Graz Univ Technol, IAIK, Graz, Austria.
[Topcu, Ufuk] Univ Texas Austin, Austin, TX 78712 USA.
RP Konighofer, B (reprint author), Graz Univ Technol, IAIK, Graz, Austria.
EM bettina.koenighofer@iaik.tugraz.at
NR 20
TC 0
Z9 0
U1 0
U2 0
PU SPRINGER INT PUBLISHING AG
PI CHAM
PA GEWERBESTRASSE 11, CHAM, CH-6330, SWITZERLAND
SN 0302-9743
BN 978-3-319-49052-6; 978-3-319-49051-9
J9 LECT NOTES COMPUT SC
PY 2016
VL 10028
BP 134
EP 151
DI 10.1007/978-3-319-49052-6_9
PG 18
WC Computer Science, Hardware & Architecture; Computer Science, Software
Engineering
SC Computer Science
GA BG5WE
UT WOS:000389792000009
ER
PT S
AU Jang, WY
Park, J
Kakas, G
Noyola, M
AF Jang, Woo-Yong
Park, James
Kakas, George
Noyola, Michael
BE Bruzzone, L
Bovolo, F
TI Demonstration of Multispectral Target Locator using Collocated RF
Antenna/LWIR Joint Sensor System and Datacube
SO IMAGE AND SIGNAL PROCESSING FOR REMOTE SENSING XXII
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Image and Signal Processing for Remote Sensing XXII
CY SEP 26-28, 2016
CL Edinburgh, SCOTLAND
SP SPIE
DE RF; LWIR; range; azimuth; radar; image; datacube; location
ID DATA FUSION
AB Recently, we configured RF antennas and a LWIR camera connected to an actuator system to form a collocated sensor system. We also developed a GUI which directly controls both RF and IR systems, azimuth motion, as well as performs post-processing for data integration and location finding. RF range data and LWIR images were collected simultaneously by using our configured sensor system as azimuth was varied from 0 to 70 degrees. Series of collected RF data was transformed into a single 2-D radar image showing range profile of targets against azimuth. For LWIR, data was aligned into a single panoramic image as a function of azimuth by incorporating shift parameters observed in the measurements. Both RF/IR images were then arranged into a 3-D datacube, having azimuth as a common domain, and this datacube directly provided locational information of targets. For demonstration, we successfully located objects such as a corner reflector and a blackbody source under a dark background. In addition, we highlight some additional features available in our sensor system including target classification using both Euclidean and SVM based multi-classifier techniques, and tracking capability for region of interest on moving targets. Future work would be to improve the current system for outdoor measurement to locate distant targets.
C1 [Jang, Woo-Yong] Univ Dayton, Res Inst, Sensor APEX, Dayton, OH 45469 USA.
[Jang, Woo-Yong; Park, James; Kakas, George; Noyola, Michael] Air Force Res Lab, Sensors Directorate, 2241 Avion Circle, Wright Patterson AFB, OH 45433 USA.
RP Jang, WY (reprint author), Univ Dayton, Res Inst, Sensor APEX, Dayton, OH 45469 USA.; Jang, WY (reprint author), Air Force Res Lab, Sensors Directorate, 2241 Avion Circle, Wright Patterson AFB, OH 45433 USA.
NR 8
TC 0
Z9 0
U1 0
U2 0
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-1-5106-0412-4; 978-1-5106-0413-1
J9 PROC SPIE
PY 2016
VL 10004
AR 100040D
DI 10.1117/12.2235350
PG 9
WC Engineering, Electrical & Electronic; Remote Sensing; Optics
SC Engineering; Remote Sensing; Optics
GA BG9FP
UT WOS:000393154600012
ER
PT S
AU Zuraski, SM
Fiorino, ST
Beecher, EA
Figlewski, NM
Schmidt, JD
McCrae, JE
AF Zuraski, Steven M.
Fiorino, Steven T.
Beecher, Elizabeth A.
Figlewski, Nathan M.
Schmidt, Jason D.
McCrae, Jack E.
BE Stein, KU
Gonglewski, JD
TI Electro-optic testbed utilizing a dynamic range gated Rayleigh beacon
for atmospheric turbulence profiling
SO OPTICS IN ATMOSPHERIC PROPAGATION AND ADAPTIVE SYSTEMS XIX
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Optics in Atmospheric Propagation and Adaptive Systems XIX
CY SEP 28-29, 2016
CL Edinburgh, SCOTLAND
SP SPIE
DE Rayleigh beacon; atmospheric turbulence; laser guidestar
AB The Photometry Analysis and Optical Tracking and Evaluation System (PANOPTES) Quad Axis Telescope is a unique four axis mount Ritchey-Chretien 24 inch telescope capable of tracking objects through the zenith without axes rotation delay (no Dead Zone). This paper describes enhancement components that will be added to the quad axis mount telescope that will enable measurements supporting novel research and field testing focused on 'three-dimensional' characterization of turbulent atmospheres, mitigation techniques, and new sensing modalities. These all support research and operational techniques relating to astronomical imaging and electro-optical propagation though the atmosphere, relative to sub-meter class telescopes in humid, continental environments. This effort uses custom designed and commercial off the shelf hardware; sub-system components discussed will include a wavefront sensor system, a co-aligned beam launch system, and a fiber coupled research laser. The wavefront sensing system is designed with the ability to take measurements from a dynamic altitude adjustable laser beacon scattering spot, a key concept that enables rapid turbulence structure parameter measurements over an altitude varied integrated atmospheric volume. The sub-components are integrated with the overall goal of measuring a height-resolved volumetric profile for the atmospheric turbulence structure parameter at the site, and developing mobile techniques for such measurements. The design concept, component selection, and measurement technique will be discussed in the main sections of this paper. This project is a collaborative effort between the Air Force Research Labs Sensors Directorate and the Air Force Institute of Technology Center for Directed Energy.
C1 [Zuraski, Steven M.; Fiorino, Steven T.; McCrae, Jack E.] US Air Force, Ctr Directed Energy AFIT CDE, Inst Technol, Dept Engn Phys, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
[Beecher, Elizabeth A.; Figlewski, Nathan M.; Schmidt, Jason D.] US Air Force, Res Lab, Sensors Directorate, 2241 Avionics Circle, Wright Patterson AFB, OH 45433 USA.
RP Zuraski, SM (reprint author), US Air Force, Ctr Directed Energy AFIT CDE, Inst Technol, Dept Engn Phys, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
FU Applied Optimization Inc.; MZA Associates Corporation
FX The authors gratefully acknowledge support for this project from Applied
Optimization Inc. and MZA Associates Corporation. Their aid in part
selection, acquisition, and integration has been instrumental to the
success of this project. The views expressed in this paper are those of
the authors and do not necessarily reflect the official policy or
position of the Air Force, the Department of Defense, or the U.S.
Government.
NR 7
TC 0
Z9 0
U1 0
U2 0
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-1-5106-0408-7; 978-1-5106-0409-4
J9 PROC SPIE
PY 2016
VL 10002
AR UNSP 1000207
DI 10.1117/12.2240980
PG 8
WC Optics; Physics, Applied; Telecommunications
SC Optics; Physics; Telecommunications
GA BG9EU
UT WOS:000393152600005
ER
PT J
AU De Castro, M
AF De Castro, Mauricio
TI Johann Gregor Mendel: paragon of experimental science
SO MOLECULAR GENETICS & GENOMIC MEDICINE
LA English
DT Editorial Material
ID MENDEL,GREGOR
C1 [De Castro, Mauricio] US Air Force, Ctr Med Genet, 81st Med Grp, Biloxi, MS 39530 USA.
RP De Castro, M (reprint author), US Air Force, Ctr Med Genet, 81st Med Grp, Biloxi, MS 39530 USA.
NR 25
TC 0
Z9 0
U1 0
U2 2
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 2324-9269
J9 MOL GENET GENOM MED
JI Mol. Genet. Genom. Med.
PD JAN
PY 2016
VL 4
IS 1
BP 3
EP 8
DI 10.1002/mgg3.199
PG 6
WC Genetics & Heredity
SC Genetics & Heredity
GA EJ7NU
UT WOS:000393409900001
PM 26788542
ER
PT B
AU Zeliff, K
Bennette, W
Ferguson, S
AF Zeliff, Kayla
Bennette, Walter
Ferguson, Scott
GP ASME
TI MULTI-OBJECTIVE COMPOSITE PANEL OPTIMIZATION USING MACHINE LEARNING
CLASSIFIERS AND GENETIC ALGORITHMS
SO PROCEEDINGS OF THE ASME INTERNATIONAL DESIGN ENGINEERING TECHNICAL
CONFERENCES AND COMPUTERS AND INFORMATION IN ENGINEERING CONFERENCE,
2016, VOL 2A
LA English
DT Proceedings Paper
CT ASME International Design Engineering Technical Conferences and
Computers and Information in Engineering Conference (IDETC/CIE)
CY AUG 21-24, 2016
CL Charlotte, NC
SP ASME, Design Engn Div, ASME, Computers & Informat Engn Div
ID DESIGN
AB Design spaces that consist of millions or billions of design combinations pose a challenge to current methods for identifying optimal solutions. Complex analyses can also lead to lengthy computation times that further challenge the effectiveness of an algorithm in terms of solution quality and run-time. This work explores combining the design space exploration approach of a Multi-Objective Genetic Algorithm with different instance-based, statistical, rule-based and ensemble classifiers to reduce the number of unnecessary function evaluations associated with poorly performing designs. Results indicate that introducing a classifier to identify child designs that are likely to push the Pareto frontier toward an optima reduce the number of function calculations by 75-85%, depending on the classifier implemented.
C1 [Zeliff, Kayla; Bennette, Walter] Air Force Res Lab, Griffiss AFB, NY USA.
[Ferguson, Scott] North Carolina State Univ, Raleigh, NC 27695 USA.
RP Ferguson, S (reprint author), North Carolina State Univ, Raleigh, NC 27695 USA.
EM kayla.zeliff@us.af.mil; walter.bennette.1@us.af.mil;
scott_ferguson@ncsu.edu
NR 23
TC 0
Z9 0
U1 0
U2 0
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-5010-7
PY 2016
AR UNSP V02AT03A004
PG 12
WC Engineering, Multidisciplinary; Engineering, Mechanical
SC Engineering
GA BG9KL
UT WOS:000393362900004
ER
PT B
AU Fuchi, K
Buskoh, PR
Joo, JJ
Reich, GW
AF Fuchi, Kazuko
Buskoh, Philip R.
Joo, James J.
Reich, Gregory W.
GP ASME
TI CONTROL OF RF TRANSMISSION CHARACTERISTICS THROUGH ORIGAMI DESIGN
SO PROCEEDINGS OF THE ASME INTERNATIONAL DESIGN ENGINEERING TECHNICAL
CONFERENCES AND COMPUTERS AND INFORMATION IN ENGINEERING CONFERENCE,
2016, VOL 5B
LA English
DT Proceedings Paper
CT ASME International Design Engineering Technical Conferences and
Computers and Information in Engineering Conference (IDETC/CIE)
CY AUG 21-24, 2016
CL Charlotte, NC
SP ASME, Design Engn Div, ASME, Computers & Informat Engn Div
AB The efficient mapping between 2D and 3D spaces offered by origami facilitates the exploration of a vast design space of 3D reconfigurable devices. Many existing origami adaptations for engineering applications assume known folded geometries. However, "what to make" becomes a critical question for design problems where the intuition on the relationship between the geometry and function is limited. This article discusses a systematic design method for folding patterns used to tune electromagnetic performance. Radio frequency transmission characteristics of a frequency selective surface are investigated as an example. The fold stiffness distribution and the embedded actuator locations on a substrate are optimized using the sensitivity information obtained through the electromagnetic analysis in COMSOL. The optimal crease pattern and actuator distribution are used to fold a substrate hosting dipoles of known dimensions. Attaining a smooth optimization process proved to be challenging due to the high sensitivity of the FSS on the dipole orientations. A surrogate optimization problem is solved to achieve a resonant frequency tuning toward a target frequency.
C1 [Fuchi, Kazuko; Joo, James J.; Reich, Gregory W.] Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
[Buskoh, Philip R.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Fuchi, Kazuko] Wright State Univ, Wright State Res Inst, Beavercreek, OH 45431 USA.
RP Buskoh, PR (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM philip.buskohl.1@us.af.mil
FU AFOSR [LRIR 13RQ02COR]
FX This research is supported under AFOSR funding, LRIR 13RQ02COR. Approved
for public release, distribution is unlimited. Case number:
88ABW-2016-0967
NR 16
TC 0
Z9 0
U1 1
U2 1
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-5016-9
PY 2016
AR V05BT07A018
PG 7
WC Engineering, Multidisciplinary; Engineering, Mechanical
SC Engineering
GA BG9KU
UT WOS:000393365000018
ER
PT B
AU Kuhn, M
Fuchi, K
Bazzan, G
Durstock, MJ
Joo, JJ
Reich, GW
Vaia, RA
Buskohl, PR
AF Kuhn, Michael
Fuchi, Kazuko
Bazzan, Giorgio
Durstock, Michael J.
Joo, James J.
Reich, Gregory W.
Vaia, Richard A.
Buskohl, Philip R.
GP ASME
TI COUPLING OF GEOMETRIC AND MATERIAL STIFFENING MECHANISMS IN ORIGAMI
DESIGN
SO PROCEEDINGS OF THE ASME INTERNATIONAL DESIGN ENGINEERING TECHNICAL
CONFERENCES AND COMPUTERS AND INFORMATION IN ENGINEERING CONFERENCE,
2016, VOL 5B
LA English
DT Proceedings Paper
CT ASME International Design Engineering Technical Conferences and
Computers and Information in Engineering Conference (IDETC/CIE)
CY AUG 21-24, 2016
CL Charlotte, NC
SP ASME, Design Engn Div, ASME, Computers & Informat Engn Div
AB Origami, the ancient art of paper folding, has recently garnered attention from the scientific community for its capacity for unique 2D - 3D shape change and programmable mechanical properties. Application areas of such properties include packaging, self-assembly, shock absorption and deployable structures. Recent studies have highlighted the role of the folded geometry to regulate the mechanical response of the origami structures, such as the increased compression stiffness of origami tubes or the tunable in-plane stiffness through select inversion of bi-stable fold vertices. In addition to geometric re-enforcement, the mechanical response of an origami structure can also be programmed through spatial patterning of the individual fold line stiffnesses. However, the coupling between the geometric and material stiffening design spaces for origami structures is poorly understood and design rules are needed to guide the use of material stiffening to enhance or mitigate a geometric stiffening effect. In this computational study, a modal analysis of a corrugated fold with varying degrees of pre-fold and different sets of fold stiffness distributions is evaluated to highlight the interaction between geometric and material stiffness mechanisms.
C1 [Kuhn, Michael; Bazzan, Giorgio] UES Inc, Beavercreek, OH 45432 USA.
[Fuchi, Kazuko; Joo, James J.; Reich, Gregory W.] Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
[Fuchi, Kazuko] Wright State Univ, Wright State Res Inst, Beavercreek, OH 45431 USA.
[Durstock, Michael J.; Vaia, Richard A.; Buskohl, Philip R.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Buskohl, PR (reprint author), Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM philip.buskohl.1@us.af.mil
FU Air Force Office of Scientific Research (AFOSR) [13RQ02COR, 16RXCOR319]
FX This research is supported by the Air Force Office of Scientific
Research (AFOSR). Grant# 13RQ02COR and 16RXCOR319.
NR 13
TC 0
Z9 0
U1 0
U2 0
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-5016-9
PY 2016
AR V05BT07A023
PG 8
WC Engineering, Multidisciplinary; Engineering, Mechanical
SC Engineering
GA BG9KU
UT WOS:000393365000023
ER
PT J
AU Willke, T
AF Willke, Tara
TI THREE WRONGS DO NOT MAKE A RIGHT: FEDERAL SOVEREIGN IMMUNITY, THE FERES
DOCTRINE, AND THE DENIAL OF CLAIMS BROUGHT BY MILITARY MOTHERS AND THEIR
CHILDREN FOR INJURIES SUSTAINED PRE-BIRTH
SO WISCONSIN LAW REVIEW
LA English
DT Article
ID UNITED-STATES
C1 [Willke, Tara] Duquesne Univ, Sch Law, Pittsburgh, PA 15219 USA.
[Willke, Tara] US Air Force, Washington, DC 20330 USA.
RP Willke, T (reprint author), Duquesne Univ, Sch Law, Pittsburgh, PA 15219 USA.; Willke, T (reprint author), US Air Force, Washington, DC 20330 USA.
NR 47
TC 0
Z9 0
U1 0
U2 0
PU UNIV WISCONSIN LAW SCHOOL
PI MADISON
PA 975 BASCOM MALL, MADISON, WI 53706 USA
SN 0043-650X
EI 1943-1120
J9 WISC LAW REV
JI Wis. Law Rev.
PY 2016
IS 2
BP 263
EP 286
PG 24
WC Law
SC Government & Law
GA EJ8NL
UT WOS:000393482500002
ER
PT J
AU Spencer, DA
Wang, Y
Humphrey, LR
AF Spencer, David A.
Wang, Yue
Humphrey, Laura R.
GP IEEE
TI Trust-Based Human-Robot Interaction for Multi-Robot Symbolic Motion
Planning
SO 2016 IEEE/RSJ INTERNATIONAL CONFERENCE ON INTELLIGENT ROBOTS AND SYSTEMS
(IROS 2016)
LA English
DT Proceedings Paper
CT IEEE/RSJ International Conference on Intelligent Robots and Systems
(IROS)
CY OCT 09-14, 2016
CL Daejeon, SOUTH KOREA
SP IEEE, RSJ
DE Symbolic Motion Planning; Human-in-the-Loop; Trust
ID AUTOMATION; SYSTEMS
AB Symbolic motion planning for robots is the process of specifying and planning robot tasks in a discrete space, then carrying them out in a continuous space in a manner that preserves the discrete-level task specifications. Despite progress in symbolic motion planning, many challenges remain, including addressing scalability for multi-robot systems and improving solutions by incorporating human intelligence in an adaptive fashion. In this paper, we use local communication, observation, control protocols, and compositional reasoning approaches to decompose the planning problem to address scalability. To address solution quality and adaptability, we use a dynamic and computational trust model to aid this decomposition and to implement real-time switching between automated and human motion planning. A simulation is provided demonstrating the successful implementation of these methods.
C1 [Spencer, David A.; Wang, Yue] Clemson Univ, Dept Mech Engn, Clemson, SC 29634 USA.
[Humphrey, Laura R.] US Air Force, Res Lab, Wright Patterson AFB, OH USA.
RP Spencer, DA (reprint author), Clemson Univ, Dept Mech Engn, Clemson, SC 29634 USA.
EM daspenc@clemson.edu; yue6@clemson.edu; laura.humphrey@us.af
FU AFRL's Summer Faculty Fellowship Program (SFFP); AFOSR YIP
FX Work supported by AFRL's Summer Faculty Fellowship Program (SFFP) and
AFOSR YIP. Distribution A: Approved for public release, #
88ABW-2015-4071.
NR 18
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-5090-3762-9
PY 2016
BP 1443
EP 1449
PG 7
WC Computer Science, Artificial Intelligence; Robotics
SC Computer Science; Robotics
GA BG7XO
UT WOS:000391921701089
ER
PT J
AU Feng, L
Humphrey, L
Lee, I
Topcu, U
AF Feng, Lu
Humphrey, Laura
Lee, Insup
Topcu, Ufuk
GP IEEE
TI Human-Interpretable Diagnostic Information for Robotic Planning Systems
SO 2016 IEEE/RSJ INTERNATIONAL CONFERENCE ON INTELLIGENT ROBOTS AND SYSTEMS
(IROS 2016)
LA English
DT Proceedings Paper
CT IEEE/RSJ International Conference on Intelligent Robots and Systems
(IROS)
CY OCT 09-14, 2016
CL Daejeon, SOUTH KOREA
SP IEEE, RSJ
AB Advances in automation have the potential to reduce the workload required for human planning and execution of missions carried out by robotic systems such as unmanned aerial vehicles (UAVs). However, automation can also result in an increase in system complexity and a corresponding decrease in system transparency, which makes identifying and reasoning about errors in mission plans more difficult. To help explain errors in robotic planning systems, we define a notion of structured probabilistic counterexamples, which provide human-interpretable diagnostic information about requirements violations resulting from complex probabilistic robotic behavior. We propose an approach for generating such counterexamples using mixed integer linear programming and demonstrate the usefulness of our approach via a case study of UAV mission planning demonstrated in the AMASE multi-UAV simulator.
C1 [Feng, Lu; Lee, Insup] Univ Penn, Dept Comp & Informat Sci, Philadelphia, PA 19104 USA.
[Humphrey, Laura] US Air Force, Res Lab, Control Sci Ctr Excellence, Dayton, OH 45433 USA.
[Topcu, Ufuk] Univ Texas Austin, Dept Aerosp Engn & Engn Mech, Austin, TX 78712 USA.
RP Feng, L (reprint author), Univ Penn, Dept Comp & Informat Sci, Philadelphia, PA 19104 USA.
EM lufeng@cis.upenn.edu; laura.humphrey@us.af.mil; lee@cis.upenn.edu;
utopcu@utexas.edu
FU AFOSR [13RQ03COR]; AFRL/RQ [FA8650-15-C-2546]; ONR [N00014-15-IP-00052];
DARPA [FA8750-12-2-0247]; James S. McDonnell Foundation Postdoctoral
Fellowship
FX This work was supported by AFOSR grant # 13RQ03COR, AFRL/RQ contract #
FA8650-15-C-2546, ONR grant # N00014-15-IP-00052, DARPA grant #
FA8750-12-2-0247, and the James S. McDonnell Foundation Postdoctoral
Fellowship.
NR 13
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-5090-3762-9
PY 2016
BP 1673
EP 1680
PG 8
WC Computer Science, Artificial Intelligence; Robotics
SC Computer Science; Robotics
GA BG7XO
UT WOS:000391921701123
ER
PT B
AU Marshall, KS
Crawford, R
Jensen, D
AF Marshall, K. Scott
Crawford, Richard
Jensen, Daniel
GP ASME
TI Analogy Seeded Mind-Maps: A Comparison of Verbal and Pictorial
Representation of Analogies in the Concept Generation Process
SO PROCEEDINGS OF THE ASME INTERNATIONAL DESIGN ENGINEERING TECHNICAL
CONFERENCES AND COMPUTERS AND INFORMATION IN ENGINEERING CONFERENCE,
2016, VOL 7
LA English
DT Proceedings Paper
CT ASME International Design Engineering Technical Conferences and
Computers and Information in Engineering Conference (IDETC/CIE)
CY AUG 21-24, 2016
CL Charlotte, NC
SP ASME, Design Engn Div, ASME, Computers & Informat Engn Div
ID DESIGN-BY-ANALOGY
AB Recent research has investigated methods based on design-by-analogy meant to enhance concept generation. While these analogies can be developed in different ways and can come from many different areas, one of the most common methods is to use key customer needs or key functions as the starting point. One approach uses these key terms to seed a search for grammatically similar words. While these methods are promising, they can be cumbersome and difficult to apply in engineering classrooms or industrial product development settings.
This paper presents further evaluation of the Analogy Seeded Mind-Maps method, a new method to prompt generation of analogous solution principles drawn from multiple analogical domains. We randomly select a set of 10-15 words from a graph of grammatically analogical synonyms of a functional design requirement "seed" and populate the first-level nodes of a mind map with the selected textual analogies. This mind-map then serves as a visual tool that is utilized during the concept generation process. The effectiveness of the tool in generating concepts has been evaluated in previous studies.
In the current study, we evaluate the effect of substituting pictures for the verbal analogies in the Analogy Seeded Mind-Maps method. The study involved student volunteers who were recruited from a senior-level design methodology course. The students were asked to complete a simple concept generation task (in teams) using either a purely verbal version of the Analogy Seeded Mind-Maps method or the alternative version that relied on pictorial analogies. The results were evaluated for quantity, quality and novelty of the concepts generated using the two methods. Analysis of the results shows that there is a statistically significant difference in the novelty of ideas generated by the two methods, with the pictorial version producing a larger number of novel ideas than the purely verbal version. While the differences in quantity and quality are not statistically significant at the P-Value < 0.05 level, there are differences that approach this level of statistical significance. Further studies are needed to determine if there is any benefit to a method that combines both verbal and pictorial analogies.
C1 [Marshall, K. Scott; Crawford, Richard] Univ Texas Austin, Austin, TX 78712 USA.
[Jensen, Daniel] US Air Force Acad, Colorado Springs, CO 80840 USA.
RP Marshall, KS (reprint author), Univ Texas Austin, Austin, TX 78712 USA.
FU United Sates Air Force Academy [FA7000-12-2-0005, FA7000-14-2-0003]
FX This material is based on research sponsored by the United Sates Air
Force Academy under agreement numbers FA7000-12-2-0005 and
FA7000-14-2-0003. The US Government is authorized to reproduce and
distribute reprints for Government purposes notwithstanding any
copyright notation thereon. The views and conclusions contained herein
are those of the authors and should not be interpreted as necessarily
representing the official policies or endorsements, either expressed or
implied, of the United States Air Force Academy or the US government.
NR 16
TC 0
Z9 0
U1 0
U2 0
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-5019-0
PY 2016
AR UNSP V007T06A010
PG 10
WC Engineering, Multidisciplinary
SC Engineering
GA BG9BO
UT WOS:000393001500010
ER
PT S
AU Knisely, AG
Hyde, MW
Havrilla, MJ
Collins, P
AF Knisely, Alexander G.
Hyde, Milo W.
Havrilla, Michael J.
Collins, PeterJ.
GP IEEE
TI Uniaxial Anisotropic Material Measurement using a Single Port Waveguide
Probe
SO AMTA 2016 PROCEEDINGS
SE AMTA Proceedings
LA English
DT Proceedings Paper
CT Antenna-Measurement-Techniques-Association (AMTA) Conference
CY OCT 30-NOV 04, 2016
CL Austin, TX
SP Antenna Measurement Tech Assoc
AB A single port waveguide probe (SPWP), non-destructive material measurement system is developed to measure uniaxial anisotropic media. A moment method technique employing a uniaxial parallel plate Green's function is used for extracting dielectric material properties. Simulated and measured uniaxial samples are evaluated to judge system performance
C1 [Knisely, Alexander G.; Hyde, Milo W.; Havrilla, Michael J.; Collins, PeterJ.] US Air Force, Dept Elect & Comp Engn, Inst Technol AFIT, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM alexander.knisely@afit.edu
NR 15
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2380-1840
J9 AMTA PROC
PY 2016
PG 6
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BG8QW
UT WOS:000392649700023
ER
PT S
AU Stewart, J
Wells, B
Kakas, G
Borger, J
Terry, S
Petry, J
AF Stewart, James
Wells, Brittany
Kakas, George
Borger, John
Terry, Sarah
Petry, Jarod
GP IEEE
TI Investigation into Antenna Measurement Quality from a Large Compact
Range Operating at Q-Band
SO AMTA 2016 PROCEEDINGS
SE AMTA Proceedings
LA English
DT Proceedings Paper
CT Antenna-Measurement-Techniques-Association (AMTA) Conference
CY OCT 30-NOV 04, 2016
CL Austin, TX
SP Antenna Measurement Tech Assoc
DE compact range; quiet zone; Q-band; field probe; gain-transfer method;
beamforming; angle of arrival
AB The utility of a compact range is based, in part, on an acceptable purity of its collimated plane wave generated in a well-defined spatial volume (a.k.a. quiet zone) over a given frequency spectrum. Improvements that broaden the useable frequency spectrum lead to greater utility. This is especially true for a compact range supporting an R&D environment where RF sensor technology is reaching higher and higher into the frequency spectrum. In this paper we investigate performance of the AFRL OneRY Indoor Range in which the upper frequency of operation has been extended from Ku-band to Q-band. Specifically, we analyze field probe data and antenna pattern data to determine measurement quality. Field probe results derived from uniform linear RF sampling in the quiet zone are assessed in terms of taper and ripple metrics for both amplitude and phase. This data is also processed into beamforming representation and compared against a predicted pattern generated using an ideal plane wave. The quality of antenna pattern data is then assessed through two types of measurements. Firstly, antenna gain calibration accuracy is examined by employing a method we coined the dual reference antenna diagnostic. Similar to a dual cylinder calibration employed as a RCS measurement quality assessment, the dual reference antenna approach measures the gain of two different antennas that each has an associated calibration table. Secondly, azimuth pattern measurements are evaluated in regards to dynamic range and null depths. The paper ends with a discussion on planned follow-on efforts to improve measurement capabilities.
C1 [Stewart, James; Wells, Brittany; Kakas, George; Borger, John] US Air Force, Sensors Directorate, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Terry, Sarah] Riverside Res Inst, Beavercreek, OH USA.
[Petry, Jarod] Def Engn Corp, Beavercreek, OH USA.
EM james.stewart.64@us.af.mil
NR 13
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2380-1840
J9 AMTA PROC
PY 2016
PG 6
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BG8QW
UT WOS:000392649700003
ER
PT J
AU Jessen, GH
Schuette, M
Leedy, K
Crespo, A
Donigan, T
Green, A
Walker, D
Tetlak, S
Sutherlin, K
AF Jessen, Gregg Huascar
Schuette, Michael
Leedy, Kevin
Crespo, Antonio
Donigan, Thomas
Green, Andrew
Walker, Dennis, Jr.
Tetlak, Stephen
Sutherlin, Karynn
GP IEEE
TI Scalability of Zinc Oxide Thin-Film Transistors for RF Amplifiers and DC
Switch Applications
SO 2016 COMPOUND SEMICONDUCTOR WEEK (CSW) INCLUDES 28TH INTERNATIONAL
CONFERENCE ON INDIUM PHOSPHIDE & RELATED MATERIALS (IPRM) & 43RD
INTERNATIONAL SYMPOSIUM ON COMPOUND SEMICONDUCTORS (ISCS)
LA English
DT Proceedings Paper
CT 28th International Conference on Indium Phosphide & Related Materials
(IPRM) / 43rd International Symposium on Compound Semiconductors (ISCS)
CY JUN 26-30, 2016
CL Toyama, JAPAN
C1 [Jessen, Gregg Huascar; Schuette, Michael; Leedy, Kevin; Crespo, Antonio; Donigan, Thomas; Walker, Dennis, Jr.; Tetlak, Stephen; Sutherlin, Karynn] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Green, Andrew] Wyle, Beverly Hills, CA USA.
RP Jessen, GH (reprint author), Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-5090-1964-9
PY 2016
PG 1
WC Engineering, Electrical & Electronic; Materials Science,
Multidisciplinary
SC Engineering; Materials Science
GA BG8HP
UT WOS:000392285400280
ER
PT S
AU Lu, C
Kaspi, R
Newell, T
Yang, C
Luong, S
Gianardi, D
AF Lu, Chunte
Kaspi, Ron
Newell, Tim
Yang, Chi
Luong, Sun
Gianardi, Don
GP IEEE
TI Molecular Beam Epitaxial Growth of 3 mu m Mid-wave Infrared Laser using
InGaAsSb/AlInAsSb Quantum Well Structure
SO 2016 INTERNATIONAL SEMICONDUCTOR LASER CONFERENCE (ISLC)
SE IEEE International Semiconductor Laser Conference
LA English
DT Proceedings Paper
CT 25th International Semiconductor Laser Conference (ISLC)
CY SEP 12-15, 2016
CL Kobe, JAPAN
DE mid-wave infrared semiconductor laser; molecular beam epitaxial growth
AB We report the experimental results of growth and characterization of InGaAsSblAlInAsSb quantum well laser structure. The epitaxial structure was grown using molecular beam epitaxy system on GaSb substrate and characterized using a 2 mu m pump source. We observed 3.1 mu m laser emission at 200K and 2. 98 mu m laser emission near 100K.
C1 [Lu, Chunte; Kaspi, Ron; Newell, Tim; Yang, Chi; Luong, Sun; Gianardi, Don] Air Force Res Lab, Directed Energy Directorate, Albuquerque, NM 87117 USA.
RP Lu, C (reprint author), Air Force Res Lab, Directed Energy Directorate, Albuquerque, NM 87117 USA.
FU Air Force Office Scientific Research
FX We thankfully acknowledge the Air Force Office Scientific Research for
providing funding.
NR 7
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2326-5442
BN 978-4-8855-2306-9
J9 IEEE INT SEMICONDUCT
PY 2016
PG 2
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BG8DS
UT WOS:000392249800083
ER
PT S
AU Sigler, C
Boyle, C
Kirch, JD
Lindberg, D
Earles, T
Myers, J
Bedford, R
Botez, D
Mawst, LJ
AF Sigler, C.
Boyle, C.
Kirch, J. D.
Lindberg, D., III
Earles, T.
Myers, J.
Bedford, R.
Botez, D.
Mawst, L. J.
GP IEEE
TI 4.7 mu m-Emitting Leaky-Wave-Coupled Quantum Cascade Laser Phase-Locked
Array
SO 2016 INTERNATIONAL SEMICONDUCTOR LASER CONFERENCE (ISLC)
SE IEEE International Semiconductor Laser Conference
LA English
DT Proceedings Paper
CT 25th International Semiconductor Laser Conference (ISLC)
CY SEP 12-15, 2016
CL Kobe, JAPAN
DE Quantum Cascade Lasers; MOCVD; phase-locked array
AB Phase-locking, via leaky-wave coupling, offive 4.7 mu m-emitting quantum cascade lasers is demonstrated for coherent-power scaling. Non-resonant devices fabricated by two-step MOCVD operate in a mixture of in-phase and out-of-phase modes to 3.85 W peak pulsed output power. Design analysis shows pure in-phase-mode operation under resonant-coupling occurs for optimized devices.
C1 [Sigler, C.; Boyle, C.; Kirch, J. D.; Botez, D.; Mawst, L. J.] Univ Wisconsin, ECE Dept, 1415 Engn Dr, Madison, WI 53706 USA.
[Lindberg, D., III; Earles, T.] Intraband LLC, 200 N Prospect Ave, Madison, WI 53726 USA.
[Myers, J.; Bedford, R.] Air Force Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
RP Mawst, LJ (reprint author), Univ Wisconsin, ECE Dept, 1415 Engn Dr, Madison, WI 53706 USA.
EM mawst@engr.wisc.edu
FU Air Force Research Laboratory [FA8650-13-2-1616]; Navy STTR
[N68335-15-C-0073]
FX This work was supported in part by the Air Force Research Laboratory
under Grant FA8650-13-2-1616 and Navy STTR N68335-15-C-0073
NR 5
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2326-5442
BN 978-4-8855-2306-9
J9 IEEE INT SEMICONDUCT
PY 2016
PG 2
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BG8DS
UT WOS:000392249800037
ER
PT S
AU Chadid, M
Vernin, J
Abe, L
Agabi, A
Jumper, GY
Preston, CW
Sneden, C
Liu, LY
Yao, YQ
Wang, HS
Aristidi, E
Rivet, JP
Carbillet, M
Giordano, C
Bondoux, E
Moggio, L
Trinquet, H
AF Chadid, M.
Vernin, J.
Abe, L.
Agabi, A.
Jumper, G. -Y.
Preston, C. -W
Sneden, Ch.
Liu, L. -Y.
Yao, Y. -Q.
Wang, H. -S.
Aristidi, E.
Rivet, J. -P
Carbillet, M.
Giordano, Ch
Bondoux, E.
Moggio, L.
Trinquet, H.
CA PAIX Team
BE Evans, CJ
Simard, L
Takami, H
TI Opening a New Window on the Southern Stars for less money PAIX the First
Antarctica Polar Mission Photometer
SO GROUND-BASED AND AIRBORNE INSTRUMENTATION FOR ASTRONOMY VI
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Ground-Based and Airborne Instrumentation for Astronomy VI
CY JUN 26-30, 2016
CL Edinburgh, SCOTLAND
SP SPIE
DE Antarctica; South Pole; DomeC; Polar Mission; PAIX; Stellar Physics;
Pulsation and Dynamics; Large Observation Survey
ID RR LYRAE STARS; DOME-C; TURBULENCE; SCIDAR
AB In this invited paper, we implement a new way to study the stellar oscillations, pulsations and their evolutionary properties with long uninterrupted and continuous precision observations over 150 days from the ground, and without the regular interruptions imposed by the earth rotation. PAIX-First Robotic Antarctica Polar Mission-gives a new insight to cope with unresolved stellar enigma and stellar oscillation challenges and offers a great opportunity to benefit from an access to the best astronomical site on Earth -DomeC-. The project is made of low cost commercial components, and achieves astrophysical measurement time-series of stellar physics fields, challenging photometry from space that shows large gaps in terms of flexibility during the observing runs, the choice of targets, the repair of failures and the inexorable high costs. PAIX has yet more advantages than space missions in observing in UBV RI bands and then collecting unprecedented simultaneous multicolor light curves of several targets.
We give a brief history of the Astronomy in Antarctica and describe the first polar robotized mission PAIX and the outcome of stellar physics from the heart of Antarctica during several polar nights. We briefly discuss our first results and perspectives on the pulsating stars and its evolution from Antarctica, especially the connection between temporal hydrodynamic phenomena and cyclic modulations. Finally, we highlight the impact of PAIX on the stellar physics study and the remaining challenges to successfully accomplish the Universe explorations under extreme conditions.
C1 [Chadid, M.; Vernin, J.; Abe, L.; Agabi, A.; Aristidi, E.; Rivet, J. -P; Carbillet, M.; Bondoux, E.] Univ Nice Sophia Antipolis, Observ Cote Azur, UNIR 7293, Parc Valrose, F-06108 Nice 02, France.
[Jumper, G. -Y.] US Air Force Res Lab, Hanscom AFB, MA USA.
[Preston, C. -W] Carnegie Observ, 813 Santa Barbara St, Pasadena, CA 91101 USA.
[Sneden, Ch.] Univ Texas Austin, Dept Astron, RLM 15308, Austin, TX 78712 USA.
[Sneden, Ch.] Univ Texas Austin, McDonald Observ, Austin, TX 78712 USA.
[Liu, L. -Y.; Yao, Y. -Q.; Wang, H. -S.] Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing, Peoples R China.
[Giordano, Ch] INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy.
[Moggio, L.] Univ Trento, Via Calepina 14, I-38122 Trento, Italy.
[Trinquet, H.] DGA Matrise Informat, BP 7, F-35998 Rennes Armees, France.
[PAIX Team] TAAF, Antarctica Res Stn, South Pole, NJ USA.
RP Chadid, M (reprint author), Univ Nice Sophia Antipolis, Observ Cote Azur, UNIR 7293, Parc Valrose, F-06108 Nice 02, France.
EM chadid@unice.fr
NR 19
TC 0
Z9 0
U1 0
U2 0
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-1-5106-0196-3
J9 PROC SPIE
PY 2016
VL 9908
AR 99080T
DI 10.1117/12.2232612
PG 15
WC Astronomy & Astrophysics; Instruments & Instrumentation; Optics
SC Astronomy & Astrophysics; Instruments & Instrumentation; Optics
GA BG7NF
UT WOS:000391509100021
ER
PT S
AU Zhdanov, BV
Rotondaro, MD
Shaffer, MK
Knize, RJ
AF Zhdanov, B. V.
Rotondaro, M. D.
Shaffer, M. K.
Knize, R. J.
BE Ackermann, H
Bohn, WL
Titterton, DH
TI Thermal effects in Cs DPAL and alkali cell window damage
SO HIGH-POWER LASERS 2016: TECHNOLOGY AND SYSTEMS
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on High-Power Lasers - Technology and Systems
CY SEP 28-29, 2016
CL Edinburgh, SCOTLAND
SP SPIE
ID VAPOR LASER
AB Experiments on power scaling of Diode Pumped Alkali Lasers (DPALs) revealed some limiting parasitic effects such as alkali cell windows and gain medium contamination and damage, output power degradation in time and others causing lasing efficiency decrease or even stop lasing(1). These problems can be connected with thermal effects, ionization, chemical interactions between the gain medium components and alkali cells materials. Study of all these and, possibly, other limiting effects and ways to mitigate them is very important for high power DPAL development. In this talk we present results of our experiments on temperature measurements in the gain medium of operating Cs DPAL at different pump power levels in the range from lasing threshold to the levels causing damage of the alkali cell windows. For precise contactless in situ temperature measurements, we used an interferometric technique, developed in our lab(2). In these experiments we demonstrated that damage of the lasing alkali cell starts in the bulk with thermal breakdown of the hydrocarbon buffer gas. The degradation processes start at definite critical temperatures of the gain medium, different for each mixture of buffer gas. At this critical temperature, the hydrocarbon and the excited alkali metal begin to react producing the characteristic black soot and, possibly, some other chemical compounds, which both harm the laser performance and significantly increase the harmful heat deposition within the laser medium. This soot, being highly absorptive, is catastrophically heated to very high temperatures that visually observed as bulk burning. This process quickly spreads to the cell windows and causes their damage. As a result, the whole cell is also contaminated with products of chemical reactions.
The detailed measurement of these critical temperatures for different alkali metals and different buffer gas mixtures can allow for a DPAL design that, when operated, does not achieve the critical temperatures at which thermal breakdown occurs.
C1 [Zhdanov, B. V.; Rotondaro, M. D.; Shaffer, M. K.; Knize, R. J.] US Air Force Acad, Laser & Opt Res Ctr, 2354 Fairchild Dr, Usaf Acad, CO 80840 USA.
RP Zhdanov, BV (reprint author), US Air Force Acad, Laser & Opt Res Ctr, 2354 Fairchild Dr, Usaf Acad, CO 80840 USA.
EM Boris.zhdanov.ctr@usafa.edu
FU High Energy Lasers Joint Technology Office; Air Force Office of
Scientific Research
FX We acknowledge support of the High Energy Lasers Joint Technology Office
and Air Force Office of Scientific Research.
NR 13
TC 1
Z9 1
U1 0
U2 0
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-1-5106-0385-1
J9 PROC SPIE
PY 2016
VL 9990
AR 99900C
DI 10.1117/12.2242166
PG 10
WC Optics; Physics, Applied
SC Optics; Physics
GA BG8QC
UT WOS:000392624600002
ER
PT S
AU Torres, D
Wang, TY
Zhang, J
Dooley, S
Tan, XB
Sepulveda, N
AF Torres, David
Wang, Tongyu
Zhang, Jun
Dooley, Sarah
Tan, Xiaobo
Sepulveda, Nelson
GP ASME
TI EXPERIMENTAL CHARACTERIZATION OF THE DYNAMICS OF VO2-BASED MEMS MIRRORS
SO PROCEEDINGS OF THE ASME CONFERENCE ON SMART MATERIALS, ADAPTIVE
STRUCTURES AND INTELLIGENT SYSTEMS, 2016, VOL 1
SE Proceedings of the ASME Conference on Smart Materials Adaptive
Structures and Intelligent Systems
LA English
DT Proceedings Paper
CT ASME Conference on Smart Materials, Adaptive Structures and Intelligent
Systems
CY SEP 28-30, 2016
CL Stowe, VT
SP ASME, Aerosp Div
ID VANADIUM DIOXIDE; PROJECTION DISPLAY; TRANSITION
AB In this work, the time and frequency response of VO2-based MEMS mirrors are characterized across the transition for individual and simultaneous actuation. First, a step input train of increasing amplitude are applied to the device up to the point of transition is reached. Second, the frequency response is measured by applying a small sinusoidal input, where the displacement remained inside the hysteresis of the VO2. The frequency of the input varied from 0.1 to 2000 Hz. The thermal dynamics of the device is found to be the factor limiting the device's bandwidth to less than 10 Hz. The average resonant frequency of the present VO2-based MEMS mirror was found to be 412.5 Hz for individual actuation. These results allow for the extraction of the necessary parameters to create a model that can be used to design devices with specific dynamic performance.
C1 [Torres, David; Wang, Tongyu; Tan, Xiaobo; Sepulveda, Nelson] Michigan State Univ, ECE Dept, E Lansing, MI 48840 USA.
[Zhang, Jun] Univ Calif San Diego, ECE Dept, La Jolla, CA 92093 USA.
[Dooley, Sarah] AFRL, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
RP Torres, D (reprint author), Michigan State Univ, ECE Dept, E Lansing, MI 48840 USA.
EM torresd5@egr.msu.edu; wangton3@msu.edu; j5zhang@ucsd.edu;
sarah.dooley@us.af.mil; xbtan@egr.msu.edu; nelsons@egr.msu.edu
FU National Science Foundation [ECCS 1306311, CMMI 1301243]
FX The authors wish to acknowledge the contributions of Dr. John L. Ebel
for helpful discussions and technical assistance at the Air Force
Research Laboratory, Wright-Patterson Air Force Base, OH. The
fabrication of the MEMS Mirror was partially done at the Lurie
Nanofabrication Facility at University of Michigan. This work was
supported in part by the National Science Foundation under Grant ECCS
1306311 and Grant CMMI 1301243. Device development was made possible by
a cooperative research and development agreement (CRADA No.
15-075-RY-01) between AFRLs Sensors Directorate (AFRL/RY) and Michigan
State University.
NR 25
TC 0
Z9 0
U1 0
U2 0
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
SN 2153-2001
BN 978-0-7918-5048-0
J9 PROC ASME CONF SMART
PY 2016
AR V001T02A005
PG 7
WC Engineering, Mechanical; Materials Science, Multidisciplinary; Mechanics
SC Engineering; Materials Science; Mechanics
GA BG8KA
UT WOS:000392361000024
ER
PT S
AU Moosavian, A
Gamble, LL
Pankonien, AM
Inman, DJ
AF Moosavian, Amin
Gamble, Lawren L.
Pankonien, Alexander M.
Inman, Daniel J.
GP ASME
TI BIO-INSPIRED COUPLING OF CAMBER AND SWEEP IN MORPHING WINGS
SO PROCEEDINGS OF THE ASME CONFERENCE ON SMART MATERIALS, ADAPTIVE
STRUCTURES AND INTELLIGENT SYSTEMS, 2016, VOL 2
SE Proceedings of the ASME Conference on Smart Materials Adaptive
Structures and Intelligent Systems
LA English
DT Proceedings Paper
CT ASME Conference on Smart Materials, Adaptive Structures and Intelligent
Systems
CY SEP 28-30, 2016
CL Stowe, VT
SP ASME, Aerosp Div
AB This work aims to investigate how bio-inspired morphing wings built with state-of-the-art materials affect the aerodynamics and extend the range of flight conditions. In particular, this study investigates the aerodynamic effects of coupled airfoil and planform sweep morphing. The morphed geometries were chosen to resemble a current morphing design that uses Macro Fiber Composites (MFCs) and Shape Memory Alloy (SMA) wires. The primary mode of camber actuation is achieved using the MFCs which are supplemented using antagonistic SMA wires, forming a hinge ahead of the MFCs. The SMA hinge also allows for bi-directional actuation, resulting in a reflexed airfoil. Numerical simulations were conducted using a Reynolds-averaged-Navier-Stokes (RANS) turbulence model for low Reynolds-number flow, in addition to wind tunnel experiments. Nine different wing configurations were considered consisting of combinations of 3 sweep angles and 3 airfoil profiles, including unactuated (baseline), monotonic camber actuation, and reflex actuation. These geometries were 3D printed on a high resolution printer. Tests were conducted in a 2 ft. x 2 ft. wind tunnel at the University of Michigan at a flow speed of 10 m/s, consistent with the flow regime expected for this scale of aircraft. The preliminary results suggest a definite improvement in flight performance associated with the proposed coupling.
C1 [Moosavian, Amin; Gamble, Lawren L.; Inman, Daniel J.] Univ Michigan, Dept Aerosp Engn, Ann Arbor, MI 48109 USA.
[Pankonien, Alexander M.] Air Force Res Lab, Wright Patterson AFB, OH USA.
RP Moosavian, A (reprint author), Univ Michigan, Dept Aerosp Engn, Ann Arbor, MI 48109 USA.
EM amoosavi@umich.edu; Ilgamble@umich.edu;
alexander.pankonien.ctr@us.af.mil; daninman@umich.edu
FU US Air Force Office of Scientific Research [FA9550-16-1-0087]; Natural
Sciences and Engineering Research Council of Canada (NSERC)
FX This work was supported in part by the US Air Force Office of Scientific
Research under grant number FA9550-16-1-0087, titled "Avian-Inspired
Multifunctional Morphing Vehicles" monitored by Dr. B.L. Lee, and in
part by the Natural Sciences and Engineering Research Council of Canada
(NSERC).
NR 9
TC 0
Z9 0
U1 1
U2 1
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
SN 2153-2001
BN 978-0-7918-5049-7
J9 PROC ASME CONF SMART
PY 2016
AR V002T06A007
PG 8
WC Engineering, Mechanical; Materials Science, Biomaterials
SC Engineering; Materials Science
GA BG8KC
UT WOS:000392361800039
ER
PT S
AU Schmit, RF
Johnson, R
Grove, J
AF Schmit, Ryan F.
Johnson, Rudy
Grove, James
GP ASME
TI BOUNDARY CONDITION EFFECTS ON SUPERSONIC RECTANGULAR CAVITIES
SO PROCEEDINGS OF THE ASME FLUIDS ENGINEERING DIVISION SUMMER MEETING,
2016, VOL 1B
SE ASME Fluids Engineering Division Summer Meeting
LA English
DT Proceedings Paper
CT ASME Fluids Engineering Division Summer Meeting
CY JUL 10-14, 2016
CL Washington, DC
SP ASME, Fluids Engn Div
AB Traditionally, in rectangular cavity research the fundamental physical understanding of cavity resonance is a handful of empirical equations. The authors have recently derived the cavity acoustic wave equation and the cavity hydrodynamic wave equation from Lighthill's and Curle's acoustic analogy wave equations. By changing the cavities boundary conditions with half span doors, in both doors open and one door closed configurations, the resulting pressure spectrum changes are attributable to the boundary condition changes and can capture the large frequency shift differences due to the door configuration changes. These results suggest these derived cavity wave equations are correct.
C1 [Schmit, Ryan F.; Johnson, Rudy; Grove, James] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Schmit, RF (reprint author), Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
NR 10
TC 0
Z9 0
U1 0
U2 0
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
SN 1093-4928
BN 978-0-7918-5029-9
J9 ASME FLUID ENG DIV
PY 2016
AR V01BT14A003
PG 8
WC Engineering, Mechanical; Mechanics
SC Engineering; Mechanics
GA BG8JT
UT WOS:000392355300003
ER
PT J
AU Fabbri, C
Sattar, J
AF Fabbri, Cameron
Sattar, Junaed
GP IEEE
TI SMARTTALK: A Learning-based Framework for Natural Human-Robot
Interaction
SO 2016 13TH CONFERENCE ON COMPUTER AND ROBOT VISION (CRV)
LA English
DT Proceedings Paper
CT 13th Conference on Computer and Robot Vision (CRV)
CY JUN 01-03, 2016
CL Victoria, CANADA
SP Canadian Image Proc & Pattern Recognit Soc, Assoc Canadienne Traitement Images Reconnaissance Formes
ID DIALOGUE; LANGUAGE
AB This paper presents a learning-based framework named SMARTTALK for natural-language human-robot interaction (HRI). The primary goal of this framework is to enable non-expert users to control and program a mobile robot using natural language commands. SMARTTALK is modality-agnostic, and is capable of integrating with both speech and non-speech (e.g., gesture-based) communication. Initially, robots using this mechanism are equipped with a limited vocabulary of primitive commands and functionality; however, through extended use and interaction, the robots are able to learn new commands and adapt to user's behaviors and habits. This makes the proposed framework highly desirable for long-term deployment in a variety of HRI tasks. We present the design of this framework and experimental data on a number of realistic scenarios to evaluate its performance. A qualitative experiment on a robotic platform is also presented.
C1 [Fabbri, Cameron] US Air Force, Res Lab, Informat Directorate, Rome, NY 13441 USA.
[Sattar, Junaed] Univ Minnesota, Comp Sci & Engn, Minneapolis, MN USA.
RP Fabbri, C (reprint author), US Air Force, Res Lab, Informat Directorate, Rome, NY 13441 USA.
EM cameron.fabbri@us.af.mil; junaed@cs.umn.edu
NR 19
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-5090-2491-9
PY 2016
BP 376
EP 382
DI 10.1109/CRV.2016.67
PG 7
WC Robotics
SC Robotics
GA BG7ZQ
UT WOS:000392125600051
ER
PT S
AU Liu, J
Li, HB
Himed, B
AF Liu, Jun
Li, Hongbin
Himed, Braham
GP IEEE
TI Exploiting Persymmetry for Adaptive Detection in Distributed MIMO Radar
SO 2016 24TH EUROPEAN SIGNAL PROCESSING CONFERENCE (EUSIPCO)
SE European Signal Processing Conference
LA English
DT Proceedings Paper
CT 24th European Signal Processing Conference (EUSIPCO)
CY AUG 28-SEP 02, 2016
CL Budapest, HUNGARY
SP European Assoc Signal Proc
DE Adaptive detection; multiple-input-multiple-output (MIMO) radar;
persymmetry
ID PARTIALLY-HOMOGENEOUS ENVIRONMENT; ALGORITHM; ANTENNAS; CLUTTER; GLRT
AB We consider the adaptive detection problem in colored Gaussian noise with unknown persymmetric covariance matrix in a multiple-input-multiple-output (MIMO) radar with spatially dispersed antennas. To this end, a set of secondary data for each transmit-receive pair is assumed to be available. MIMO versions of the persymmetric generalized likelihood ratio test (MIMO-PGLRT) detector and the persymmetric sampler matrix inversion (MIMO-PSMI) detector are proposed. Compared to the MIMO-PGLRT detector, the MIMO-PSMI detector has a simple form and is computationally more efficient. Numerical examples are provided to demonstrate that the proposed two detection algorithms can significantly alleviate the requirement of the amount of secondary data, and allow for a noticeable improvement in detection performance.
C1 [Liu, Jun; Li, Hongbin] Stevens Inst Technol, ECE Dept, Hoboken, NJ 07030 USA.
[Himed, Braham] AFRL, RF Technol Branch, Wright Patterson AFB, OH 45433 USA.
[Liu, Jun] Xidian Univ, Natl Lab Radar Signal Proc, Xian 710071, Peoples R China.
RP Liu, J (reprint author), Stevens Inst Technol, ECE Dept, Hoboken, NJ 07030 USA.; Liu, J (reprint author), Xidian Univ, Natl Lab Radar Signal Proc, Xian 710071, Peoples R China.
EM jun_liu_math@hotmail.com; hongbin.li@stevens.edu; braham.himed@us.af.mil
NR 20
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2076-1465
BN 978-0-9928-6265-7
J9 EUR SIGNAL PR CONF
PY 2016
BP 2091
EP 2095
PG 5
WC Engineering, Electrical & Electronic
SC Engineering
GA BG7XB
UT WOS:000391891900395
ER
PT S
AU Stinco, P
Greco, MS
Gini, F
Himed, B
AF Stinco, Pietro
Greco, Maria S.
Gini, Fulvio
Himed, Braham
GP IEEE
TI Cognitive Tracking in IEEE 802.22 Symbiotic Radars
SO 2016 24TH EUROPEAN SIGNAL PROCESSING CONFERENCE (EUSIPCO)
SE European Signal Processing Conference
LA English
DT Proceedings Paper
CT 24th European Signal Processing Conference (EUSIPCO)
CY AUG 28-SEP 02, 2016
CL Budapest, HUNGARY
SP European Assoc Signal Proc
DE Cognitive Tracking; Cognitive Radio; Passive Radar; Symbiotic Radar;
IEEE 802.22; ComRadE system
ID CRAMER-RAO BOUNDS; SELECTION
AB This paper focuses on a Symbiotic Radar, that is a Passive Radar which is an integral part of a communication network. The Symbiotic Radar exploits the signals of opportunity emitted by the Base Station (BS) and the Customer Premise Equipments (CPE) of an IEEE 802.22 WRAN. The radar is linked to the BS and suggests the best CPEs that must be scheduled to transmit. This selection is performed by a cognitive passive tracking algorithm that exploits the feedback information contained in the target state prediction to improve the tracking performance. The proposed algorithm has been designed with the consideration that the communication capabilities of the whole network must be preserved.
C1 [Stinco, Pietro; Greco, Maria S.; Gini, Fulvio] Univ Pisa, Dept Ingn Informaz, Pisa, Italy.
[Himed, Braham] US Air Force, Res Lab, RF Technol Branch, Wright Patterson AFB, OH 45433 USA.
RP Stinco, P (reprint author), Univ Pisa, Dept Ingn Informaz, Pisa, Italy.
EM pietro.stino@iet.unipi.it; maria.greco@iet.unipi.it;
fulvio.gini@iet.unipi.it; braham.himed@us.af.mil
OI Greco, Maria/0000-0002-3804-2949
FU EOARD [FA8655-13-1-3011]
FX This work is partially funded by EOARD grant FA8655-13-1-3011 on
"Waveform Diversity and Frequency Sharing Techniques for Cognitive Radar
Systems".
NR 14
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2076-1465
BN 978-0-9928-6265-7
J9 EUR SIGNAL PR CONF
PY 2016
BP 2211
EP 2214
PG 4
WC Engineering, Electrical & Electronic
SC Engineering
GA BG7XB
UT WOS:000391891900490
ER
PT S
AU Anderson, B
Flores, A
Dajani, I
AF Anderson, Brian
Flores, Angel
Dajani, Iyad
GP IEEE
TI Enhanced Psuedo-Random Phase Modulation for High Power Fiber Amplifiers
SO 2016 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
SE Conference on Lasers and Electro-Optics
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics (CLEO)
CY JUN 05-10, 2016
CL San Jose, CA
AB A low-pass filter is used to suppress the high-frequency components of a PRBS signal and is used to modulate a fiber amplifier. Notably, the coherence length and SBS threshold of a kilowatt-class amplifier are increased.
C1 [Anderson, Brian; Flores, Angel; Dajani, Iyad] US Air Force, Res Lab, Directed Energy Directorate, 3550 Aberdeen Ave SE, Kirtland AFB, NM 87117 USA.
RP Anderson, B (reprint author), US Air Force, Res Lab, Directed Energy Directorate, 3550 Aberdeen Ave SE, Kirtland AFB, NM 87117 USA.
NR 4
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2160-9020
BN 978-1-9435-8011-8
J9 CONF LASER ELECTR
PY 2016
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BG7HE
UT WOS:000391286402313
ER
PT S
AU Guha, S
Barnes, JO
Wei, J
Schunemann, PG
AF Guha, Shekhar
Barnes, Jacob O.
Wei, Jean
Schunemann, Peter G.
GP IEEE
TI Second Harmonic Generation of a Tunable Continuous-Wave Carbon Dioxide
Laser using Orientation-Patterned Gallium Phosphide
SO 2016 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
SE Conference on Lasers and Electro-Optics
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics (CLEO)
CY JUN 05-10, 2016
CL San Jose, CA
AB First demonstration of frequency doubling of a continuous-wave carbon dioxide laser using hydride vapor phase epitaxy grown orientation-patterned gallium phosphide is reported. Temperature dependence of second harmonic power was determined.
C1 [Guha, Shekhar; Barnes, Jacob O.; Wei, Jean] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Barnes, Jacob O.; Wei, Jean] UES Inc, Dayton, OH USA.
[Schunemann, Peter G.] BAE Syst, Nashua, NH USA.
RP Guha, S (reprint author), Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
EM shekhar.guha@us.af.mil
NR 6
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2160-9020
BN 978-1-9435-8011-8
J9 CONF LASER ELECTR
PY 2016
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BG7HE
UT WOS:000391286403278
ER
PT S
AU Haefner, JW
Usechak, NG
AF Haefner, Joseph W.
Usechak, Nicholas G.
GP IEEE
TI Rigorous Characterization and Analysis of the Operating States in a
Passively Mode-Locked Fiber Laser
SO 2016 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
SE Conference on Lasers and Electro-Optics
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics (CLEO)
CY JUN 05-10, 2016
CL San Jose, CA
AB This work experimentally investigates the full spectrum of operational regimes that exist in a standard nonlinear polarization-rotation-based mode-locked fiber ring laser in order to understand and ultimately control these states within the cavity.
C1 [Haefner, Joseph W.; Usechak, Nicholas G.] Air Force Res Lab, 2241 Avion Circle, Wright Patterson AFB, OH 45433 USA.
RP Haefner, JW (reprint author), Air Force Res Lab, 2241 Avion Circle, Wright Patterson AFB, OH 45433 USA.
EM joseph.haefner.3@us.af.mil
NR 4
TC 0
Z9 0
U1 1
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2160-9020
BN 978-1-9435-8011-8
J9 CONF LASER ELECTR
PY 2016
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BG7HE
UT WOS:000391286403274
ER
PT S
AU Halls, BR
Jiang, NB
Thul, DJ
Slipchenko, MN
Roy, S
Meyer, TR
Gord, JR
AF Halls, Benjamin R.
Jiang, Naibo
Thul, Daniel J.
Slipchenko, Mikhail N.
Roy, Sukesh
Meyer, Terrence R.
Gord, James R.
GP IEEE
TI High-Speed, Three-Dimensional Tomographic Imaging of Concentration
Fields in Turbulent Flows
SO 2016 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
SE Conference on Lasers and Electro-Optics
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics (CLEO)
CY JUN 05-10, 2016
CL San Jose, CA
AB Three-dimensional concentration fields are demonstrated using tomographic reconstruction of volumetrically illuminated turbulent flows at 20 kHz. High-speed intensified cameras coupled with vertical stereoscopes collect fourteen simultaneous views of acetone fluorescence.
C1 [Halls, Benjamin R.; Gord, James R.] US Air Force, Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
[Jiang, Naibo; Thul, Daniel J.; Slipchenko, Mikhail N.; Roy, Sukesh] Spectral Energies L1C, Dayton, OH 45431 USA.
[Meyer, Terrence R.] Purdue Univ, Sch Mech Engn, W Lafayette, IN 47907 USA.
RP Halls, BR (reprint author), US Air Force, Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA.
EM hallsbenjamin@gmail.com
NR 6
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2160-9020
BN 978-1-9435-8011-8
J9 CONF LASER ELECTR
PY 2016
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BG7HE
UT WOS:000391286400171
ER
PT S
AU Reed, JM
Ferdinandus, MR
Kinsey, N
DeVault, C
Guler, U
Shalaev, VM
Boltasseva, A
Urbas, A
AF Reed, Jennifer M.
Ferdinandus, Manuel R.
Kinsey, Nathaniel
DeVault, Clayton
Guler, Urcan
Shalaev, Vladimir M.
Boltasseva, Alexandra
Urbas, Augustine
GP IEEE
TI Transient Nonlinear Refraction Measurements of Titanium Nitride Thin
Films
SO 2016 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
SE Conference on Lasers and Electro-Optics
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics (CLEO)
CY JUN 05-10, 2016
CL San Jose, CA
AB Using the highly sensitive optical beam deflection method, the transient nonlinear refraction of thin film titanium nitride is measured. The results show a large negative instantaneous nonlinearity, followed by a long lived positive decay.
C1 [Reed, Jennifer M.; Ferdinandus, Manuel R.; Urbas, Augustine] US Air Force, Res Lab, 3005 Hobson Way, Wright Patterson AFB, OH 45433 USA.
[Ferdinandus, Manuel R.] US Air Force, Inst Technol, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
[Kinsey, Nathaniel; DeVault, Clayton; Shalaev, Vladimir M.; Boltasseva, Alexandra] Purdue Univ, Birck Nanotechnol Ctr, 1205 West State St, W Lafayette, IN 47907 USA.
[Guler, Urcan] Nanometa Technol, 1281 Win Hentschel Blvd, W Lafayette, IN 47906 USA.
RP Reed, JM (reprint author), US Air Force, Res Lab, 3005 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM jenniferreed@knights.ucf.edu
NR 5
TC 0
Z9 0
U1 2
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2160-9020
BN 978-1-9435-8011-8
J9 CONF LASER ELECTR
PY 2016
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BG7HE
UT WOS:000391286400507
ER
PT S
AU Vella, JH
Makri, E
Goldsmith, JH
Browning, AT
Limberopoulos, NI
Vitebskiy, I
Kottos, T
AF Vella, Jarrett H.
Makri, Eleana
Goldsmith, John H.
Browning, Andrew T.
Limberopoulos, Nicholaos I.
Vitebskiy, Ilya
Kottos, Tsampikos
GP IEEE
TI Experimental Realization of a Reflective Optical Limiter
SO 2016 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
SE Conference on Lasers and Electro-Optics
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics (CLEO)
CY JUN 05-10, 2016
CL San Jose, CA
ID SEMICONDUCTORS
AB We report the first realization of a reflective optical limiter, which transmits low-level radiation while offering broadband reflection for high-intensity beams. The design consists of a nonlinear lossy defect embedded in a multilayer photonic structure.
C1 [Vella, Jarrett H.; Goldsmith, John H.; Browning, Andrew T.; Limberopoulos, Nicholaos I.; Vitebskiy, Ilya] Air Force Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
[Makri, Eleana; Kottos, Tsampikos] Wesleyan Univ, Dept Phys, Middletown, CT 06459 USA.
[Goldsmith, John H.] Wyle, Dayton, OH 45433 USA.
[Browning, Andrew T.] SelectTech Serv Corp, Centerville, OH 45433 USA.
RP Makri, E (reprint author), Wesleyan Univ, Dept Phys, Middletown, CT 06459 USA.
EM emakri@wesleyan.edu
NR 6
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2160-9020
BN 978-1-9435-8011-8
J9 CONF LASER ELECTR
PY 2016
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BG7HE
UT WOS:000391286401124
ER
PT J
AU Njilla, LL
Ouete, HN
Doungwa, DK
AF Njilla, Laurent L.
Ouete, Harold N.
Doungwa, Dean K.
GP IEEE
TI Monitoring Colluding Behavior in MANETs using Game Theory
SO 2016 IEEE 21ST INTERNATIONAL WORKSHOP ON COMPUTER AIDED MODELLING AND
DESIGN OF COMMUNICATION LINKS AND NETWORKS (CAMAD)
LA English
DT Proceedings Paper
CT 21st IEEE International Workshop on Computer Aided Modelling and Design
of Communication Links and Networks (CAMAD)
CY OCT 23-25, 2016
CL Toronto, CANADA
SP IEEE, IEEE Commun Soc
AB Prevalent concerns with dynamic networks typically involve security. Especially with resource constraints in dynamic networks such as mobile ad-hoc networks (MANETs), security needs to be of particular consideration. This is part of the implementation used in IEEE Syscon2016 [1]. In this demo paper, we present the solution concept involved in tracking collusion behavior in MANETs, by considering the possibility of having some group of nodes exhibiting malicious behavior and colluding to subvert the MANET. In a MANET, the availability of having data packets forwarded may be insubstantial due to the presence of selfish nodes. Nodes may not want to participate in the network to preserve their own resources. We model a packet-forwarding problem with a negotiation game, where an arbitrator acts as a cluster head and initiates a bargaining game. We simulate the effect of the coalition of malicious nodes in a mobile environment.
C1 [Njilla, Laurent L.] US Air Force, Res Lab, Cyber Assurance Branch, Rome, NY 13441 USA.
[Ouete, Harold N.; Doungwa, Dean K.] Univ Douala, Math & Comp Sci, Douala, Cameroon.
RP Njilla, LL (reprint author), US Air Force, Res Lab, Cyber Assurance Branch, Rome, NY 13441 USA.
EM Laurent.njilla@us.af.mil; OueteHaroldo@gmail.com; Doungwadeank@gmail.com
NR 4
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-5090-2558-9
PY 2016
BP 152
EP 153
PG 2
WC Computer Science, Interdisciplinary Applications; Engineering,
Electrical & Electronic; Telecommunications
SC Computer Science; Engineering; Telecommunications
GA BG7PN
UT WOS:000391562900028
ER
PT J
AU Machovina, BL
Feeley, KJ
Machovina, BJ
AF Machovina, Brian L.
Feeley, Kenneth J.
Machovina, Brett J.
TI UAV remote sensing of spatial variation in banana production
SO CROP & PASTURE SCIENCE
LA English
DT Article
DE crop productivity; Musa; NDVI
ID PRECISION AGRICULTURE; PLANT STRESS; YIELD; IMAGERY; CROP; MANAGEMENT;
SYSTEMS; COTTON
AB Remote sensing through Unmanned Aerial Vehicles (UAV) can potentially be used to identify the factors influencing agricultural yield and thereby increase production efficiency. The use of UAV remains largely underutilised in tropical agricultural systems. In this study we tested a fixed-wing UAV system equipped with a sensor system for mapping spatial patterns of photosynthetic activity in banana plantations in Costa Rica. Spatial patterns derived from the Normalised Difference Vegetation Index (NDVI) were compared with spatial patterns of physical soil quality and banana fruit production data. We found spatial patterns of NDVI were significantly positively correlated with spatial patterns of several metrics of fruit yield and quality: bunch weight, number of hands per bunch, length of largest finger, and yield. NDVI was significantly negatively correlated with banana loss (discarded due to low quality). Spatial patterns of NDVI were not correlated with spatial patterns of physical soil quality. These results indicate that UAV systems can be used in banana plantations to help map patterns of fruit quality and yield, potentially aiding investigations of spatial patterns of underlying factors affecting production and thereby helping to increase agricultural efficiency.
C1 [Machovina, Brian L.; Feeley, Kenneth J.] Florida Int Univ, Dept Biol Sci, Miami, FL 33199 USA.
[Machovina, Brian L.; Feeley, Kenneth J.] Fairchild Trop Bot Garden, Coral Gables, FL 33156 USA.
[Machovina, Brett J.] US Air Force Acad, Dept Econ & Geosci, Corvallis, OR 97331 USA.
RP Machovina, BL (reprint author), Florida Int Univ, Dept Biol Sci, Miami, FL 33199 USA.; Machovina, BL (reprint author), Fairchild Trop Bot Garden, Coral Gables, FL 33156 USA.
EM brianmachovina@gmail.com
FU Dole Food Company, Inc.
FX This research was funded by Dole Food Company, Inc.
NR 44
TC 0
Z9 0
U1 0
U2 0
PU CSIRO PUBLISHING
PI CLAYTON
PA UNIPARK, BLDG 1, LEVEL 1, 195 WELLINGTON RD, LOCKED BAG 10, CLAYTON, VIC
3168, AUSTRALIA
SN 1836-0947
EI 1836-5795
J9 CROP PASTURE SCI
JI Crop Pasture Sci.
PY 2016
VL 67
IS 12
BP 1281
EP 1287
DI 10.1071/CP16135
PG 7
WC Agriculture, Multidisciplinary
SC Agriculture
GA EH5PA
UT WOS:000391824000006
ER
PT J
AU Braaten, BD
Anagnostou, DE
AF Braaten, Benjamin D.
Anagnostou, Dimitris E.
TI Guest Editorial Special Cluster on Conformal Antennas and Arrays From
New Advanced Materials
SO IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
LA English
DT Editorial Material
C1 [Braaten, Benjamin D.] North Dakota State Univ, Elect & Comp Engn Dept, Fargo, ND 58105 USA.
[Anagnostou, Dimitris E.] Georgia Inst Technol, Atlanta, GA 30332 USA.
[Anagnostou, Dimitris E.] South Dakota Sch Mines & Technol, Elect & Comp Engn Dept, Rapid City, SD USA.
[Anagnostou, Dimitris E.] Air Force Res Lab, Kirtland AFB, NM USA.
[Anagnostou, Dimitris E.] Democritus Univ Thrace, Xanthi, Greece.
[Anagnostou, Dimitris E.] Heriot Watt Univ, Inst Signals Sensors & Syst, Edinburgh, Midlothian, Scotland.
[Anagnostou, Dimitris E.] ASEE, Bridgeport, CT USA.
[Anagnostou, Dimitris E.] Tech Chamber Greece, Athens, Greece.
RP Braaten, BD (reprint author), North Dakota State Univ, Elect & Comp Engn Dept, Fargo, ND 58105 USA.
NR 0
TC 0
Z9 0
U1 2
U2 2
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1536-1225
EI 1548-5757
J9 IEEE ANTENN WIREL PR
JI IEEE Antennas Wirel. Propag. Lett.
PY 2016
VL 15
BP 1917
EP 1918
DI 10.1109/LAWP.2016.2630180
PG 2
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA EH4EZ
UT WOS:000391725600001
ER
PT J
AU Banks, HT
Catenacci, J
Criner, A
AF Banks, H. T.
Catenacci, Jared
Criner, Amanda
TI Quantifying the degradation in thermally treated ceramic matrix
composites
SO INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS
LA English
DT Article; Proceedings Paper
CT 17th International Symposium on Applied Electromagnetics and Mechanics
(ISEM)
CY SEP 15-18, 2015
CL JAPAN
SP Kobe Univ, Org Adv Sci & Technol, Japan Soc Maintenol, Japan Soc Appl Electromagnet & Mech, Tateisi Sci & Technol Fdn
DE Ceramic matrix composites; prohorov metric; reflectance spectroscopy;
uncertainty quantification
ID UNCERTAINTY; SILICA
AB Reflectance spectroscopy obtained from thermally treated silicon nitride carbon based ceramic matrix composites is used to quantity the oxidation products SiO2 and SiN. The data collection is described in detail in order to point out the potential biasing present in the data processing. A probability distribution is imposed on selected model parameters, and then non-parametrically estimated. A non-parametric estimation is chosen since the exact composition of the material is unknown due to the inherent heterogeneity of ceramic composites. The probability distribution is estimated using the Prohorov metric framework in which the infinite dimensional optimization is reduced to a finite dimensional optimization using an approximating space composed of linear splines. A weighted least squares estimation is carried out, and uncertainty quantification is performed on the model parameters, including a piecewise asymptotic confidence band for the estimated probability density. Our estimation results indicate a distinguishable increase in the SiO2 present in the samples which were heat treated for 100 hours compared to those treated for 10 hours.
C1 [Banks, H. T.; Catenacci, Jared] North Carolina State Univ, Ctr Res Sci Computat, Raleigh, NC 27695 USA.
[Criner, Amanda] US Air Force, Res Labs, Mat & Mfg Directorate, Wright Patterson AFB, OH USA.
RP Banks, HT (reprint author), North Carolina State Univ, Ctr Res Sci Computat, Raleigh, NC 27695 USA.
EM htbanks@ncsu.edu
FU Air Force Office of Scientific Research [AFOSR FA9550-12-1-0188, AFOSR
FA9550-15-1-0298]; AFOSR-UDRI [RSCI5002]
FX This research was supported by the Air Force Office of Scientific
Research under grant numbers AFOSR FA9550-12-1-0188, AFOSR
FA9550-15-1-0298 and AFOSR-UDRI Contract RSCI5002.
NR 23
TC 0
Z9 0
U1 2
U2 2
PU IOS PRESS
PI AMSTERDAM
PA NIEUWE HEMWEG 6B, 1013 BG AMSTERDAM, NETHERLANDS
SN 1383-5416
EI 1875-8800
J9 INT J APPL ELECTROM
JI Int. J. Appl. Electromagn. Mech.
PY 2016
VL 52
IS 1-2
BP 3
EP 24
DI 10.3233/JAE-162168
PG 22
WC Engineering, Electrical & Electronic; Mechanics; Physics, Applied
SC Engineering; Mechanics; Physics
GA EH7PV
UT WOS:000391965800002
ER
PT S
AU Carvalho, M
Eskridge, TC
Atighetchi, M
Paltzer, N
AF Carvalho, Marco
Eskridge, Thomas C.
Atighetchi, Michael
Paltzer, Nicholas
GP IEEE
TI Semi-automated Wrapping of Defenses (SAWD) for Cyber Command and Control
SO MILCOM 2016 - 2016 IEEE MILITARY COMMUNICATIONS CONFERENCE
SE IEEE Military Communications Conference
LA English
DT Proceedings Paper
CT 35th IEEE Military Communications Conference (MILCOM)
CY NOV 01-03, 2016
CL Baltimore, MD
SP IEEE, AFCEA, IEEE Commun Soc
DE Computer Security; Moving Target Defense; Cyber Command and Control
AB In this paper we introduce SAWD, a semi-automated approach for wrapping dynamic and moving target cyber defenses for cyber command and control operations. SAWD provides an interactive user interface that enables the intuitive description (either explicitly or by example) of the requirements, pre-conditions, and steps for defense installation, configuration, and operation in multiple operational environments. The defense wrapping produces a semantic representation of the defense, as well as the code necessary to manage the defense, which enables its seamless on demand deployment and control across multiple operating systems. SAWD is a collaborative effort between Florida Institute of Technology, Raytheon BBN Technologies, and Air Force Research Laboratory.
C1 [Carvalho, Marco; Eskridge, Thomas C.] Florida Inst Technol, Harris Inst Assured Informat, Melbourne, FL 32901 USA.
[Atighetchi, Michael] Raytheon BBN Technol, Cambridge, MA USA.
[Paltzer, Nicholas] US Air Force, Res Lab, Rome, NY USA.
RP Carvalho, M (reprint author), Florida Inst Technol, Harris Inst Assured Informat, Melbourne, FL 32901 USA.
EM mcarvalho@fit.edu; teskridge@fit.edu; matighet@bbn.com;
nicholas.paltzer@us.af.mil
NR 6
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7578
BN 978-1-5090-3781-0
J9 IEEE MILIT COMMUN C
PY 2016
BP 19
EP 24
PG 6
WC Telecommunications
SC Telecommunications
GA BG7LX
UT WOS:000391433600004
ER
PT S
AU Trias, ED
Simpson, WR
Foltz, KE
Konieczny, FP
AF Trias, Eric D.
Simpson, William R.
Foltz, Kevin E.
Konieczny, Frank P.
GP IEEE
TI Enterprise Level Security
SO MILCOM 2016 - 2016 IEEE MILITARY COMMUNICATIONS CONFERENCE
SE IEEE Military Communications Conference
LA English
DT Proceedings Paper
CT 35th IEEE Military Communications Conference (MILCOM)
CY NOV 01-03, 2016
CL Baltimore, MD
SP IEEE, AFCEA, IEEE Commun Soc
DE Access control; authentication; authorization; digital signatures;
identity and access management; identity claims; public key
infrastructure
AB Mission success and effectiveness depends on timely, secured delivery of information to authorized personnel or systems. Unfortunately, the current security paradigm of building a fortress to protect systems in the network is not sufficient in cyberspace. Further access control measures, such as role-based permissions, to prevent intrusions/disruptions are also insufficient. We present an alternative mission-based approach to a more granular access control paradigm, based on 14 years of research and pilot efforts. This distributed security approach has no need for passwords or system accounts, thus eliminating the associated management overhead. At each step in the authorization process, the system determines validated identities and claims for appropriate access and privileges. The techniques employed are resilient, secure, extensible, and scalable. The system, called Enterprise Level Security (ELS), is currently being researched. This paper discusses the ELS, a web-based security architecture designed to select and incorporate technology into a cohesive set of policies and rules for an enterprise information system. ELS provides application and data level access control automatically, based on the warfighter's current mission profile. As the warfighter's profile changes, authorized accesses are automatically deleted and new ones established to provide relevant, least privileged, mission information at the time of need. The paper begins by introducing ELS, its design principles and architecture, along with its foundational role in developing a forward-looking enterprise baseline; then, it continues by presenting ELS' current status and performance metrics, along with future plans for expansion of capabilities.
C1 [Trias, Eric D.] USAF, SAF, CIO CTO, Washington, DC 20330 USA.
[Simpson, William R.; Foltz, Kevin E.] Inst Def Anal, Alexandria, VA 22311 USA.
RP Trias, ED (reprint author), USAF, SAF, CIO CTO, Washington, DC 20330 USA.
NR 26
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7578
BN 978-1-5090-3781-0
J9 IEEE MILIT COMMUN C
PY 2016
BP 31
EP 36
PG 6
WC Telecommunications
SC Telecommunications
GA BG7LX
UT WOS:000391433600006
ER
PT S
AU Tian, X
Chen, GS
Pham, K
Blasch, E
AF Tian, Xin
Chen, Genshe
Khanh Pham
Blasch, Erik
GP IEEE
TI Joint Transmission Power Control in Transponded SATCOM Systems
SO MILCOM 2016 - 2016 IEEE MILITARY COMMUNICATIONS CONFERENCE
SE IEEE Military Communications Conference
LA English
DT Proceedings Paper
CT 35th IEEE Military Communications Conference (MILCOM)
CY NOV 01-03, 2016
CL Baltimore, MD
SP IEEE, AFCEA, IEEE Commun Soc
DE Transponder; Transmission power control; Power Robbing; Link Margin;
Uncertainties
AB This paper presents a novel approach for the uplink transmission power control for satellite communication (SATCOM) links that share a transponder's transmission power. The proposed approach provides explicit link margins (LM) for both uplinks and downlinks against losses from various sources that are uncertain in nature. The feature allows the proposed algorithm to work effectively with information from SATCOM radio frequency (RF) situation awareness to establish transponded SATCOM links that achieve desired Quality of Service (QoS) requirements. The algorithm is applicable for both traditional satellite communication systems and protected Frequency Hopping (FH) SATCOM systems with transparent transponders.
C1 [Tian, Xin; Chen, Genshe] Intelligent Fus Technol Inc, Germantown, MD 20876 USA.
[Khanh Pham] US Air Force, Res Lab, Kirtland AFB, NM 87117 USA.
[Blasch, Erik] US Air Force, Res Lab, Rome, NY 13441 USA.
RP Tian, X (reprint author), Intelligent Fus Technol Inc, Germantown, MD 20876 USA.
EM xtian@intfusiontech.com; gchen@intfusiontech.com;
khanh.pham.1@us.af.mil; erik.blasch.1@us.af.mil
NR 16
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7578
BN 978-1-5090-3781-0
J9 IEEE MILIT COMMUN C
PY 2016
BP 126
EP 131
PG 6
WC Telecommunications
SC Telecommunications
GA BG7LX
UT WOS:000391433600022
ER
PT S
AU Pinyoanuntapong, K
Goswami, M
Habib, AB
Kwon, HM
Pham, K
AF Pinyoanuntapong, Krittetash
Goswami, Madhuprana
Habib, Ashfia Binte
Kwon, Hyuck M.
Khanh Pham
GP IEEE
TI Boundaries of Signal-to-Noise Ratio for Adaptive Code Modulations
SO MILCOM 2016 - 2016 IEEE MILITARY COMMUNICATIONS CONFERENCE
SE IEEE Military Communications Conference
LA English
DT Proceedings Paper
CT 35th IEEE Military Communications Conference (MILCOM)
CY NOV 01-03, 2016
CL Baltimore, MD
SP IEEE, AFCEA, IEEE Commun Soc
DE Adaptive code modulation; jamming; satellite communications; Rician
fading; convolutional code
AB Adaptive code modulation (ACM) has been studied for last two decades to enhance the bandwidth and power efficiency in a bandwidth-constrained and power-constrained communication system environment. This paper studies how to decide the boundaries of a signal-to-noise ratio (SNR) for the ACM mode selection for a given set of parameters and system model. Also, this paper proposes an efficient and practical algorithm to search the proper ACM mode that meets a target bit error rate (BER) and achieves the maximum data rate. The proposed algorithm is found to be effective under jamming and interference, even if channel and jamming state information (JSI) are unavailable. The results in this paper can be applicable for future satellite and mobile communication system designs against jamming and interference environments.
C1 [Pinyoanuntapong, Krittetash; Goswami, Madhuprana; Habib, Ashfia Binte; Kwon, Hyuck M.] Wichita State Univ, Dept Elect Engn & Comp Sci, Wichita, KS 67260 USA.
[Khanh Pham] US Air Force, Res Lab, Kirtland AFB, NM 87117 USA.
RP Kwon, HM (reprint author), Wichita State Univ, Dept Elect Engn & Comp Sci, Wichita, KS 67260 USA.
EM Hyuck.kwon@wichita.edu; AFRL_RVSV@kirtland.af.mil
NR 14
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7578
BN 978-1-5090-3781-0
J9 IEEE MILIT COMMUN C
PY 2016
BP 132
EP 137
PG 6
WC Telecommunications
SC Telecommunications
GA BG7LX
UT WOS:000391433600023
ER
PT S
AU Hannon, M
Feng, S
Kwon, H
Pham, K
AF Hannon, Matthew
Feng, Shaung
Kwon, Hyuck
Khanh Pham
GP IEEE
TI Jamming Statistics-Dependent Frequency Hopping
SO MILCOM 2016 - 2016 IEEE MILITARY COMMUNICATIONS CONFERENCE
SE IEEE Military Communications Conference
LA English
DT Proceedings Paper
CT 35th IEEE Military Communications Conference (MILCOM)
CY NOV 01-03, 2016
CL Baltimore, MD
SP IEEE, AFCEA, IEEE Commun Soc
DE Frequency hopping; partial-band tone jamming; typical sequence; jamming;
multiple-access interference
AB This paper studies a jamming statistics-dependent frequency-hopping (FH) pattern generation scheme. Most existing FH patterns are determined by two encryption keys: (a) one for FH in the frequency domain, and (b) the other for time permutation in the time domain. These keys are independent of channel conditions. Hence, an FH signal generated by these two keys occupies the entire spectrum in both frequency and time domains, and the probability of detection by a jammer is low. However, the probability of a hit (or jamming) on the desired user's frequency channels by partial-band noise jamming (PBNJ) can be high because it is inversely proportional to the total number of available frequency positions. Can an FH system with jamming-dependent adaptive FH patterns safeguard the communications systems more effectively? If the answer is yes, then how can an efficient jamming-dependent adaptive FH pattern be found, and can it be implemented cost-effectively for future communications systems against jamming? The aim of this paper is to study answers to the questions posed here.
C1 [Hannon, Matthew; Feng, Shaung; Kwon, Hyuck] Wichita State Univ, Dept Elect Engn & Comp Sci, Wichita, KS 67260 USA.
[Khanh Pham] US Air Force, Res Lab, Kirtland AFB, NM USA.
RP Hannon, M (reprint author), Wichita State Univ, Dept Elect Engn & Comp Sci, Wichita, KS 67260 USA.
EM matthew.r.hannon@gmail.com; wwffeng211@hotmail.com;
hyuck.kwon@wichita.edu; khanh.pham.1@us.af.mil
NR 7
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7578
BN 978-1-5090-3781-0
J9 IEEE MILIT COMMUN C
PY 2016
BP 138
EP 143
PG 6
WC Telecommunications
SC Telecommunications
GA BG7LX
UT WOS:000391433600024
ER
PT S
AU Nguyen, LK
Wells, RB
Pham, KD
AF Nguyen, Lan K.
Wells, Richard B.
Pham, Khanh D.
GP IEEE
TI Impact of Satellite Transponder Nonlinearities on the Performance of
Protected Tactical Waveform (PTW) for the Return Link (RL)
SO MILCOM 2016 - 2016 IEEE MILITARY COMMUNICATIONS CONFERENCE
SE IEEE Military Communications Conference
LA English
DT Proceedings Paper
CT 35th IEEE Military Communications Conference (MILCOM)
CY NOV 01-03, 2016
CL Baltimore, MD
SP IEEE, AFCEA, IEEE Commun Soc
DE Transponder; Nonlinearity; Multicarrier; Adjacent Channels Interference
(ACI); Partial Band Noise Jammer (PBNJ); DVB-S2; Protected Tactical
Waveform (PTW)
ID PM CONVERSION; SYSTEMS
AB This paper examines the impact of satellite transponder nonlinearities on the performance of protected tactical waveform (PTW) for the return link (RL). The performance impact due to adjacent channels interference (ACI) and a partial band noise jammer (PBNJ) are considered in the paper. In this paper, a Shaleh model is used to model the transponder traveling wave tube amplifier (TWTA). This TWTA is protected by a soft limiter to prevent TWTA operation in the saturation region. Impact of signal clipping due to this soft limiter under a PBNJ is also investigated. Computer simulations are performed using Digital Video Broadcasting - Satellite - Second generation (DVB-S2) forward error correcting (FEC) codes. In addition, a ground hub receiver does not assume knowledge of the channel information. Ground hub is required to estimate signal-to-noise ratio (SNR) and details of SNR estimation are also discussed in the paper.
C1 [Nguyen, Lan K.] LinQuest Corp, Los Angeles, CA 90056 USA.
[Wells, Richard B.] Univ Idaho, Dept Elect Engn, Moscow, ID 83843 USA.
[Pham, Khanh D.] US Air Force, Res Lab, Kirtland AFB, NM USA.
RP Nguyen, LK (reprint author), LinQuest Corp, Los Angeles, CA 90056 USA.
NR 18
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7578
BN 978-1-5090-3781-0
J9 IEEE MILIT COMMUN C
PY 2016
BP 248
EP 253
PG 6
WC Telecommunications
SC Telecommunications
GA BG7LX
UT WOS:000391433600043
ER
PT S
AU Li, L
Tian, X
Chen, GS
Pham, K
Blasch, E
AF Li, Lun
Tian, Xin
Chen, Genshe
Khanh Pham
Blasch, Erik
GP IEEE
TI Secure Spectrum-Efficient Frequency Hopping for Return Link of Protected
Tactical Satellite Communications
SO MILCOM 2016 - 2016 IEEE MILITARY COMMUNICATIONS CONFERENCE
SE IEEE Military Communications Conference
LA English
DT Proceedings Paper
CT 35th IEEE Military Communications Conference (MILCOM)
CY NOV 01-03, 2016
CL Baltimore, MD
SP IEEE, AFCEA, IEEE Commun Soc
ID UNIQUE IDENTIFICATION; NETWORKS; DESIGN
AB Protected tactical waveform (PTW) provides cost-efficient, jamming-resistant communications via both government and commercial satellites over multiple frequency bands such as the Co, Ku-, Ka-, and X- band. Frequency hopping (FH) was originally developed for secure communications by exploiting time-frequency diversity over a large spectrum. The anti-jamming feature of the frequency hopping technique helps communication systems improve the reliability of transmission. In this paper, we consider a secure channel group hopping (CGH) scheme in order to satisfy the needs of protected tactical satellite communication system. This scheme is proposed to ensure that each channel group hops to a new hopping spectrum in a pseudo-random manner during each hopping period, and different channel groups always transmit over non-overlapping frequency bands. Our analysis suggests that the proposed CGH scheme achieves collision-free frequency hopping among channel groups, such that a higher spectrum efficiency of the system can be obtained. Simulation results are provided to validate the performance of the proposed CGH scheme for PTW system.
C1 [Li, Lun; Tian, Xin; Chen, Genshe] Intelligent Fus Technol Inc, Germantown, MD 20876 USA.
[Khanh Pham] US Air Force, Res Lab, Kirtland AFB, NM 87117 USA.
[Blasch, Erik] US Air Force, Res Lab, Rome, NY 13441 USA.
RP Li, L (reprint author), Intelligent Fus Technol Inc, Germantown, MD 20876 USA.
EM lun.li@intfusiontech.com; xtian@intfusiontech.com;
gchen@intfusiontech.com; khanh.pham.1@us.af.mil; erik.blasch.1@us.af.mil
NR 24
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7578
BN 978-1-5090-3781-0
J9 IEEE MILIT COMMUN C
PY 2016
BP 254
EP 258
PG 5
WC Telecommunications
SC Telecommunications
GA BG7LX
UT WOS:000391433600044
ER
PT S
AU Mo, ZJ
Su, WF
Matyjas, JD
AF Mo, Zijian
Su, Weifeng
Matyjas, John D.
GP IEEE
TI Amplify and Forward Relaying Protocol Design with Optimum Power and Time
Allocation
SO MILCOM 2016 - 2016 IEEE MILITARY COMMUNICATIONS CONFERENCE
SE IEEE Military Communications Conference
LA English
DT Proceedings Paper
CT 35th IEEE Military Communications Conference (MILCOM)
CY NOV 01-03, 2016
CL Baltimore, MD
SP IEEE, AFCEA, IEEE Commun Soc
DE Amplify-and-forward relaying; optimum time and power allocation; outage
probability; wireless networks
ID USER COOPERATION DIVERSITY; PERFORMANCE ANALYSIS; WIRELESS NETWORKS;
COMMUNICATION; OPTIMIZATION
AB Parameter optimization such as power and time allocation plays an important role in emerging cooperative relaying protocol designs, especially when the environment is congested and contested. However, most existing works on cooperative relaying protocol designs considered equal-time allocation scenario, i.e. equal time duration is assigned to each source and each relay. In our recent work, we developed a decode-and-forward (DF) relaying protocol with linear mapping, where a significant performance improvement can be achieved by jointly optimizing power and time allocation. In this paper, we would like to explore optimum power and time allocation in amplify-and-forward (AF) relaying protocol designs, which has been widely considered in military/commercial communication applications. First, we design an AF relaying protocol based on an linear mapping approach for re-encoding at the relay which has shown superiority in our prior study. Then, we develop an optimum linear mapping for the AF protocol to minimize the outage probability. Finally, based on the optimum linear mapping, we obtain an optimum strategy of power and time allocation. It shows that one should always allocate more energy and time resources at the source than at the relay to minimize the outage probability of the AF relaying protocol. Numerical and simulation results validate our theoretical development.
C1 [Mo, Zijian] Intelligent Fus Technol Inc, Gaithersburg, MD 20878 USA.
[Su, Weifeng] SUNY Buffalo, Dept Elect Engn, Buffalo, NY 14260 USA.
[Matyjas, John D.] US Air Force, Res Lab, RIT, Rome, NY 13441 USA.
RP Mo, ZJ (reprint author), Intelligent Fus Technol Inc, Gaithersburg, MD 20878 USA.
EM zijian.mo@intfusiontech.com; weifeng@buffalo.edu; John.Matyjas@rl.af.mil
NR 15
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7578
BN 978-1-5090-3781-0
J9 IEEE MILIT COMMUN C
PY 2016
BP 412
EP 417
PG 6
WC Telecommunications
SC Telecommunications
GA BG7LX
UT WOS:000391433600071
ER
PT S
AU Xiong, WH
Mo, ZJ
Chen, GS
Pham, K
Blasch, E
Kwon, H
AF Xiong, Wenhao
Mo, Zijian
Chen, Genshe
Khanh Pham
Blasch, Erik
Kwon, Hyuck
GP IEEE
TI Agile MU-MIMO in Congested Environments with Robust Channel Estimation
SO MILCOM 2016 - 2016 IEEE MILITARY COMMUNICATIONS CONFERENCE
SE IEEE Military Communications Conference
LA English
DT Proceedings Paper
CT 35th IEEE Military Communications Conference (MILCOM)
CY NOV 01-03, 2016
CL Baltimore, MD
SP IEEE, AFCEA, IEEE Commun Soc
ID UNIQUE IDENTIFICATION
AB This paper proposes a novel multi-user multiple-input and multiple-output (MU-MIMO) selection and beam-forming technique for a geosynchronous orbit (GSO) satellite communication (SATCOM) system. The MU-MIMO technique employs beam-forming and adaptive power allocation schemes in order to support a large numbers of users. Additionally, this paper provides a solution for the scenario where satellite ground terminals and cellular users are sharing the same spectrum band. The proposed MU-MIMO Selection And Beamforming (SAB) method makes it possible to constrain the interference created by a high powered satellite transponder, in order to maintain normal transceiving activity for commercial cellular users. Meanwhile the quality of service (QoS) is also satisfied for ground terminals. If the options of selectively serving certain users is available, the performance can be improved further in terms of constraining the interference level. The other novelty of this work is a robust channel estimation design to support the proposed MU-MIMO schemes with specifies the pilot structure design, such as the determination of proper pilot length and transmission power. Extensive simulation and numerical results illustrate and validate the theoretical development.
C1 [Xiong, Wenhao; Mo, Zijian; Chen, Genshe] Intelligent Fus Technol, Germantown, MD 20876 USA.
[Khanh Pham] US Air Force, Res Lab, Kirtland AFB, NM USA.
[Blasch, Erik] US Air Force, Res Lab, Rome, NY USA.
[Kwon, Hyuck] Wichita State Univ, Wichita, KS USA.
RP Xiong, WH (reprint author), Intelligent Fus Technol, Germantown, MD 20876 USA.
EM wenhao.xiong@intfusiontech.com; zijian.mo@intfusiontech.com;
gchen@intfusiontech.com; khanh.pham.1@us.af.mil;
erik.blasch.1@us.af.mil; hyuck.kwon@wichita.edu
NR 20
TC 0
Z9 0
U1 1
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7578
BN 978-1-5090-3781-0
J9 IEEE MILIT COMMUN C
PY 2016
BP 473
EP 478
PG 6
WC Telecommunications
SC Telecommunications
GA BG7LX
UT WOS:000391433600081
ER
PT S
AU Nowak, MJ
Zhang, ZP
Qu, Y
Dessources, DA
Wicks, M
Wu, ZQ
AF Nowak, Michael J.
Zhang, Zhiping
Qu, Yang
Dessources, Dimitri A.
Wicks, Michael
Wu, Zhiqiang
GP IEEE
TI Co-Designed Radar-Communication Using Linear Frequency Modulation
Waveform
SO MILCOM 2016 - 2016 IEEE MILITARY COMMUNICATIONS CONFERENCE
SE IEEE Military Communications Conference
LA English
DT Proceedings Paper
CT 35th IEEE Military Communications Conference (MILCOM)
CY NOV 01-03, 2016
CL Baltimore, MD
SP IEEE, AFCEA, IEEE Commun Soc
DE Radar Communication; Linear Frequency Modulation; M-sequence; Reduced
Phase Magnitude
AB As electromagnetic spectrum availability shrinks, there is growing interest in combining multiple functions, such as radar and communications signals, into a single multipurpose waveform. Historically mixed-modulation has used orthogonal separation of different message signals in different dimensions such as time or frequency. This research explores an alternative approach of implementing an in-band, mixed-modulated waveform that combines surveillance radar and communication functions into a single signal. The contribution of this research is the use of reduced phase-angle binary phase shift keying (BPSK) along with overlapped (channelized) spread-spectrum phase discretes based on pseudorandom noise sequences to encode multiple messages in a single pulse. The resulting mixed-modualted signal provides a low data rate communications message while minimizing the effect on radar performance. For the purpose of this research, radar performance will be evaluated in terms of power spectral density, matched filter auto-correlation for target detection, and the ambiguity function.
C1 [Nowak, Michael J.] US Air Force, Wright Patterson AFB, OH 45433 USA.
[Zhang, Zhiping; Qu, Yang; Dessources, Dimitri A.; Wu, Zhiqiang] Wright State Univ, Dayton, OH 45435 USA.
[Wicks, Michael] Univ Dayton, Res Inst, Dayton, OH 45469 USA.
RP Nowak, MJ (reprint author), US Air Force, Wright Patterson AFB, OH 45433 USA.
NR 6
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7578
BN 978-1-5090-3781-0
J9 IEEE MILIT COMMUN C
PY 2016
BP 918
EP 923
PG 6
WC Telecommunications
SC Telecommunications
GA BG7LX
UT WOS:000391433600156
ER
PT S
AU Sagduyu, Y
She, Y
Ponnaluri, S
Soltani, S
Li, JS
Riley, R
Banner, C
Heinen, G
AF Sagduyu, Yalin
She, Yi
Ponnaluri, Satya
Soltani, Sohraab
Li, Jason
Riley, Rob
Banner, Clif
Heinen, Greg
GP IEEE
TI Optimal Orbit Selection and Design for Airborne Relay Communications
SO MILCOM 2016 - 2016 IEEE MILITARY COMMUNICATIONS CONFERENCE
SE IEEE Military Communications Conference
LA English
DT Proceedings Paper
CT 35th IEEE Military Communications Conference (MILCOM)
CY NOV 01-03, 2016
CL Baltimore, MD
SP IEEE, AFCEA, IEEE Commun Soc
DE Force-level planning; mission planning; airborne relay; orbit;
throughput; duty cycle; optimization
AB This paper presents a force-level planning approach to optimally select and design the orbit of an airborne relay. The objective is to maximize the aggregate performance of communication subscribers served by the airborne relay. The performance is measured as either the duty cycle in terms of signal-to-noiseratio or the throughput achieved by communication subscribers. Both measures are computed with realistic channel, terrain, antenna and aircraft characteristics for ground-to-air and airto-ground communications. Different methods to generate an airborne relay orbit are discussed with their parameters to optimize. Results are specialized to optimization of elliptical orbit parameters. First, an elliptical orbit is optimally selected with the best center and radius (in X and Y-directions) as orbit parameters subject to the specified altitude and speed of the aircraft. Both exhaustive search and gradient search with reduced complexity are considered to find the best set of orbit parameters. This elliptical orbit is then converted to an operational orbit by optimally selecting orbit waypoints and locating smooth turning points while minimizing the fuel consumption of the airborne relay. A software with interactive GUI is designed and implemented for force-level planning that allows the planner to select different properties of airborne relay and communication subscribers, and returns the optimal orbit for the airborne relay.
C1 [Sagduyu, Yalin; She, Yi; Ponnaluri, Satya; Soltani, Sohraab; Li, Jason] Intelligent Automat Inc, Rockville, MD 20855 USA.
[Riley, Rob] US Air Force, Res Lab, RITF, Griffiss AFB, NY 13441 USA.
[Banner, Clif; Heinen, Greg] HNAA, AFLCMC, Hanscom Afb, MA 01731 USA.
RP Sagduyu, Y (reprint author), Intelligent Automat Inc, Rockville, MD 20855 USA.
EM ysagduyu@i-a-i.com; yshi@i-a-i.com; sponnaluri@i-a-i.com;
ssoltani@i-a-i.com; jli@i-a-i.com; robert.riley.12@us.af.mil;
clifden.banner.ctr@us.af.mil; gregory.heinen.cu@us.af.mil
NR 9
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7578
BN 978-1-5090-3781-0
J9 IEEE MILIT COMMUN C
PY 2016
BP 1161
EP 1166
PG 6
WC Telecommunications
SC Telecommunications
GA BG7LX
UT WOS:000391433600196
ER
PT S
AU Liu, Y
Borle, KM
Mroczek, JJ
Chen, BA
Gans, MJ
Oleski, PJ
Michalak, RJ
AF Liu, Yang
Borle, Kapil M.
Mroczek, Janek J.
Chen, Biao
Gans, Michael J.
Oleski, Paul J.
Michalak, Richard J.
GP IEEE
TI Variable Rate MIMO Communication with Airborne Platforms: An
Experimental Study
SO MILCOM 2016 - 2016 IEEE MILITARY COMMUNICATIONS CONFERENCE
SE IEEE Military Communications Conference
LA English
DT Proceedings Paper
CT 35th IEEE Military Communications Conference (MILCOM)
CY NOV 01-03, 2016
CL Baltimore, MD
SP IEEE, AFCEA, IEEE Commun Soc
DE Airborne Communication; DBLAST; MIMO; USRP; GNU Radio
AB Motivated by the need for robust and high throughput communication with airborne platforms, a variable rate MIMO scheme that combines the D-BLAST architecture with per antenna spreading was proposed. This paper is focused on the experimental study of this approach. We developed a software defined radio implementation of the variable rate MIMO system based on GNU Radio. Over the air transmission and reception is enabled by Universal Software Radio Peripheral (USRP). The results demonstrate the effectiveness of the proposed scheme in realizing the throughput gain afforded by MIMO communication under potentially rank deficient channel conditions that are often present in an airborne environment.
C1 [Liu, Yang; Borle, Kapil M.; Chen, Biao] Syracuse Univ, Dept Elect Engn & Comp Sci, Syracuse, NY 13244 USA.
[Borle, Kapil M.] Microsoft Corp, Redmond, WA 98052 USA.
[Mroczek, Janek J.; Gans, Michael J.; Oleski, Paul J.; Michalak, Richard J.] US Air Force, Res Lab, 525 Brooks Rd, Griffiss AFB, NY 13441 USA.
RP Liu, Y (reprint author), Syracuse Univ, Dept Elect Engn & Comp Sci, Syracuse, NY 13244 USA.
NR 6
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7578
BN 978-1-5090-3781-0
J9 IEEE MILIT COMMUN C
PY 2016
BP 1167
EP 1172
PG 6
WC Telecommunications
SC Telecommunications
GA BG7LX
UT WOS:000391433600197
ER
PT S
AU Cho, JH
Hurley, PM
Xu, SH
AF Cho, Jin-Hee
Hurley, Patrick M.
Xu, Shouhuai
GP IEEE
TI Metrics and Measurement of Trustworthy Systems
SO MILCOM 2016 - 2016 IEEE MILITARY COMMUNICATIONS CONFERENCE
SE IEEE Military Communications Conference
LA English
DT Proceedings Paper
CT 35th IEEE Military Communications Conference (MILCOM)
CY NOV 01-03, 2016
CL Baltimore, MD
SP IEEE, AFCEA, IEEE Commun Soc
DE metrics; measurement; trustworthy systems; trustworthiness; agility;
resilience; threat; vulnerability
ID RESILIENCE; SECURITY
AB Accurate measurement of the quality of systems is crucial to building trustworthy systems. Such a measurement indicates whether a system is working properly and meeting its requirements. Although security and dependability metrics are regarded as key metrics for measuring the quality of systems, they are not sufficient for measuring the quality of systems that are placed in a multi-domain environment including hardware, software, network, human factors, and physical environments. In order to embrace multidimensional aspects of the quality of a system, we introduce a trustworthiness metric framework that supports three key submetrics of trust, resilience, and agility, and propose an ontology-based framework with three corresponding sub-ontologies. We also discuss how the key metrics are related to the severity of threats and the quality of assessment tools. This work is part of the cyber defense effort conducted by the Trustworthy Systems Working Group (TSWG) under the Cyber Strategic Challenge Group (CSCG) of The Technical Cooperation Program (TTCP), which is an international cooperation organization for enhancing defense science and technology.
C1 [Cho, Jin-Hee] US Army, Res Lab, Adelphi, MD 20783 USA.
[Hurley, Patrick M.] US Air Force, Res Lab, Rome, NY USA.
[Xu, Shouhuai] Univ Texas San Antonio, San Antonio, TX USA.
RP Cho, JH (reprint author), US Army, Res Lab, Adelphi, MD 20783 USA.
EM jinhee.cho@us.army.mil; patrick.hurley.4@us.af.mil; shxu@cs.utsa.edu
NR 30
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7578
BN 978-1-5090-3781-0
J9 IEEE MILIT COMMUN C
PY 2016
BP 1237
EP 1242
PG 6
WC Telecommunications
SC Telecommunications
GA BG7LX
UT WOS:000391433600209
ER
PT S
AU Seversky, LM
Davis, S
Berger, M
AF Seversky, Lee M.
Davis, Shelby
Berger, Matthew
GP IEEE
TI On Time-series Topological Data Analysis: New Data and Opportunities
SO PROCEEDINGS OF 29TH IEEE CONFERENCE ON COMPUTER VISION AND PATTERN
RECOGNITION WORKSHOPS, (CVPRW 2016)
SE IEEE Computer Society Conference on Computer Vision and Pattern
Recognition Workshops
LA English
DT Proceedings Paper
CT 29th IEEE Conference on Computer Vision and Pattern Recognition
Workshops (CVPRW)
CY JUN 26-JUL 01, 2016
CL Las Vegas, NV
SP IEEE, IEEE Comp Soc
ID CLASSIFICATION; PERSISTENCE
AB This work introduces a new dataset and framework for the exploration of topological data analysis (TDA) techniques applied to time-series data. We examine the end-to-end TDA processing pipeline for persistent homology applied to time-delay embeddings of time series - embeddings that capture the underlying system dynamics from which time series data is acquired. In particular, we consider stability with respect to time series length, the approximation accuracy of sparse filtration methods, and the discriminating ability of persistence diagrams as a feature for learning. We explore these properties across a wide range of time-series datasets spanning multiple domains for single source multi-segment signals as well as multi-source single segment signals. Our analysis and dataset captures the entire TDA processing pipeline and includes time-delay embeddings, persistence diagrams, topological distance measures, as well as kernels for similarity learning and classification tasks for a broad set of time-series data sources. We outline the TDA framework and rationale behind the dataset and provide insights into the role of TDA for time-series analysis as well as opportunities for new work.
C1 [Seversky, Lee M.; Berger, Matthew] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Davis, Shelby] Black River Syst, Utica, NY USA.
RP Seversky, LM (reprint author), Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
EM Lee.Seversky@us.af.mil; Davis@brsc.com; Matthew.Berger.l@us.af.mil
NR 34
TC 0
Z9 0
U1 1
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2160-7508
BN 978-1-5090-1437-8
J9 IEEE COMPUT SOC CONF
PY 2016
BP 1014
EP 1022
DI 10.1109/CVPRW.2016.131
PG 9
WC Computer Science, Artificial Intelligence
SC Computer Science
GA BG7PP
UT WOS:000391572100124
ER
PT J
AU Fuller, J
Ramsey, B
Pecarina, J
Rice, M
AF Fuller, Jonathan
Ramsey, Benjamin
Pecarina, John
Rice, Mason
GP Acad Conf Ltd
TI Wireless Intrusion Detection of Covert Channel Attacks in ITU-T
G.9959-Based Networks
SO PROCEEDINGS OF THE 11TH INTERNATIONAL CONFERENCE ON CYBER WARFARE AND
SECURITY (ICCWS 2016)
LA English
DT Proceedings Paper
CT 11th International Conference on Cyber Warfare and Security (ICCWS)
CY MAR 17-18, 2016
CL Boston Univ, Boston, MA
HO Boston Univ
DE covert channel; wireless sensor networks; wireless threats; Z-Wave;
intrusion detection
AB We introduce herein an information hiding technique for injecting manipulated packets into wireless sensor networks (WSNs). We exhibit how an attacker can apply information hiding as a type of covert channel attack over radio frequency transmissions into the WSN. The feasibility of our injection method is demonstrated through an attack on the most common implementation of the ITU-T G.9959 recommendation, commercially known as Z-Wave. More specifically, we illustrate that after accessing a Z-Wave gateway controller through compromising the WLAN backbone, the attacker has the ability to install malware. The malware scans incoming Z-Wave packets for information hidden in Media Access Control (MAC) frames received by the Z-Wave controller. Upon identification of hidden information, a Reverse Secure Shell is initiated through the WLAN back to the attacker. The outcomes of this attack include control of the Z-Wave network and access to the networked devices on the target WLAN from any Internet connected device. Given this new application of information hiding techniques to Z-Wave networks, we recognize the need for countermeasures. We therefore offer an effective Misuse-based Intrusion Detection System (MBIDS) capable of distinguishing between manipulated and correctly formed packets. A Universal Software Radio Peripheral (USRP) Software-Defined Radio (SDR) is used in conjunction with a packet monitoring tool capturing incoming transmissions and inspecting them for any violations of the ITU-T G.9959 MAC specification. We then analytically and experimentally estimate the efficacy of the USRP as a packet capture device in a realistic test setup, and then evaluate the total efficiency of our MBIDS solution. By employing the MBIDS in the Z-Wave network, we show the MBIDS is capable of detecting packet manipulation attacks with 92% mean accuracy.
C1 [Fuller, Jonathan; Ramsey, Benjamin; Pecarina, John; Rice, Mason] US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Fuller, J (reprint author), US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
EM jonathan.fuller@afit.edu; benjamin.ramsey@afit.edu;
john.pecarina@afit.edu; mason.rice@afit.edu
NR 14
TC 0
Z9 0
U1 0
U2 0
PU ACAD CONFERENCES LTD
PI NR READING
PA CURTIS FARM, KIDMORE END, NR READING, RG4 9AY, ENGLAND
BN 978-1-910810-83-5
PY 2016
BP 137
EP 145
PG 9
WC Computer Science, Theory & Methods; International Relations
SC Computer Science; International Relations
GA BG7SM
UT WOS:000391660200016
ER
PT J
AU Hall, J
Ramsey, B
Rice, M
Lacey, T
AF Hall, Joseph
Ramsey, Benjamin
Rice, Mason
Lacey, Timothy
GP Acad Conf Ltd
TI Z-Wave Network Reconnaissance and Transceiver Fingerprinting Using
Software-Defined Radios
SO PROCEEDINGS OF THE 11TH INTERNATIONAL CONFERENCE ON CYBER WARFARE AND
SECURITY (ICCWS 2016)
LA English
DT Proceedings Paper
CT 11th International Conference on Cyber Warfare and Security (ICCWS)
CY MAR 17-18, 2016
CL Boston Univ, Boston, MA
HO Boston Univ
DE internet of things; wireless sensor networks; Z-Wave; transceiver
fingerprinting; software-defined radios
ID WIRELESS INTRUSION DETECTION; PREAMBLE MANIPULATION
AB Wireless Sensor Networks (WSNs) are a growing subset of the emerging Internet of Things (IoT). WSNs reduce the cost of deployment over wired alternatives; consequently, use is increasing in home automation, critical infrastructure, smart metering, and security solutions. Few published works evaluate the security of proprietary WSN protocols due to the lack of low-cost and effective research tools. One such protocol is ITU-T G. 9959-based Z-Wave, which maintains wide acceptance within the IoT market. Concurrently, the use of software-defined radios (SDRs) is experiencing significant growth due to lowcost and open-source platforms. Using SDRs, network security professionals are able to evaluate WSNs and identify avenues of attack which historically required large investments in RF equipment and specialized skill sets. Recent work introduces Scapy-radio, a generic SDR-based wireless monitor/injection tool, designed to simplify the development of penetration testing capabilities for wireless networks. Other works demonstrate methods for fingerprinting transceivers for the IEEE 802.11b and IEEE 802.15.4 standards by analyzing packet reception rates when preamble lengths are manipulated. This work significantly expands Scapy-radio, providing broad support for the Z-Wave protocol using the low-cost HackRF SDR to investigate cooperative and non-cooperative fingerprinting techniques. Specifically, this work demonstrates transceiver type fingerprinting through experimental analysis of packet reception with respect to preamble length across eight devices from five manufactures, utilizing the two most widely-used Z-Wave transceivers. Furthermore, this work presents EZ-Wave, a set of Z-Wave network reconnaissance tools capable of network discovery and enumeration, device fingerprinting, and gathering device status information. Herein this work successfully demonstrates methods for conducting network reconnaissance on a Z-Wave Home Area Network and transceiver type fingerprinting through preamble manipulation with greater than 99% accuracy.
C1 [Hall, Joseph; Ramsey, Benjamin; Rice, Mason; Lacey, Timothy] US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Hall, J (reprint author), US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
EM joseph.hall@afit.edu; benjamin.ramsey@afit.edu; mason.rice@afit.edu;
timothy.lacey@afit.edu
NR 18
TC 0
Z9 0
U1 0
U2 0
PU ACAD CONFERENCES LTD
PI NR READING
PA CURTIS FARM, KIDMORE END, NR READING, RG4 9AY, ENGLAND
BN 978-1-910810-83-5
PY 2016
BP 163
EP 171
PG 9
WC Computer Science, Theory & Methods; International Relations
SC Computer Science; International Relations
GA BG7SM
UT WOS:000391660200019
ER
PT J
AU Wylie, J
Stone, S
Mullins, B
AF Wylie, Justin
Stone, Samuel
Mullins, Barry
GP Acad Conf Ltd
TI etecting a Weakened Encryption Algorithm in Microcontrollers Using
Correlation-Based Anomaly Detection
SO PROCEEDINGS OF THE 11TH INTERNATIONAL CONFERENCE ON CYBER WARFARE AND
SECURITY (ICCWS 2016)
LA English
DT Proceedings Paper
CT 11th International Conference on Cyber Warfare and Security (ICCWS)
CY MAR 17-18, 2016
CL Boston Univ, Boston, MA
HO Boston Univ
DE microcontroller security; unintentional RF emissions; AES encryption
weakening; hardware security; correlation-based anomaly detection
AB Since the 1960s, increasingly more Integrated Circuit (IC) device manufacturers have been outsourcing fabrication of semiconductor devices to Taiwan, China, and other countries where the cost of labor is less expensive, as described by Adee (2008). This includes situations where United States companies contracted by the military to develop semiconductor-based systems outsourced the design work for the semiconductors to foreign nations according to Yudken (2010). This practice brings to bear security concerns regarding the possibility of overseas fabrication facilities embedding malicious hardware in the device early in the supply chain. Microcontrollers, specifically, are used in a large number of military operations including encryption, such as the microcontrollers used to encrypt information found in the smart cards issued by the Department of Defense, as stated by the United States General Services Administration (GSA) (2004). According to Beaumont et al. (2011), current IC testing and verification focuses on testing the chips to specifications which may detect whether functionality was removed, but will likely not detect any functionality added by an adversary. Systems used in environments where antivirus and intrusion detection systems are not feasible are particularly vulnerable. In order to detect compromised programming, or potential zero-day attacks from entering combat systems, an efficient and effective method of anomaly detection is required. This paper proposes expanding use of the Correlation-Based Anomaly Detection (CBAD) as introduced by Stone (2013) for detecting anomalous microcontroller operation using Unintentional Radio Frequency (RF) Emissions (UREs). Specifically, this paper presents the results of using the CBAD process to detect a modified Advanced Encryption Standard (AES) algorithm implemented on a microcontroller. This process was shown to be effective in detecting anomalous operations in a more limited Programmable Logic Controller (PLC) program by Stone (2013), and was less resource-intensive than alternatives such as the RF fingerprinting method used for discriminating between hardware devices by Cobb (2011). The CBAD process consists of four major steps: URE collection, signal post-processing, test statistic generation, and a declaration. In the process declaration stage, the microcontroller's program is classified as either Normal operation or Anomalous operation after comparison with a reference response. Results using the CBAD process against the UREs of a microcontroller have been encouraging thus far, and show a True Anomaly Detection Rate (TADR) of greater than 90% at Signal to Noise Ratios (SNRs) greater than 5 dB while maintaining a False Anomaly Detection Rate (FADR) of approximately 10% across all SNRs. Additionally, Receiver Operating Characteristic (ROC) curve Equal Error Rates (EER) are presented for the proposed anomaly detection process.
C1 [Wylie, Justin; Stone, Samuel; Mullins, Barry] US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Wylie, J (reprint author), US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
EM justin.wylie@afit.edu; samuel.stone@afit.edu; barry.mullins@afit.edu
NR 15
TC 0
Z9 0
U1 0
U2 0
PU ACAD CONFERENCES LTD
PI NR READING
PA CURTIS FARM, KIDMORE END, NR READING, RG4 9AY, ENGLAND
BN 978-1-910810-83-5
PY 2016
BP 335
EP 343
PG 9
WC Computer Science, Theory & Methods; International Relations
SC Computer Science; International Relations
GA BG7SM
UT WOS:000391660200041
ER
PT J
AU Seitz, A
Ramsey, B
AF Seitz, Andrew
Ramsey, Benjamin
GP Acad Conf Ltd
TI Z-Ranger: An Improved Tool Set for ZigBee Warwalking
SO PROCEEDINGS OF THE 11TH INTERNATIONAL CONFERENCE ON CYBER WARFARE AND
SECURITY (ICCWS 2016)
LA English
DT Proceedings Paper
CT 11th International Conference on Cyber Warfare and Security (ICCWS)
CY MAR 17-18, 2016
CL Boston Univ, Boston, MA
HO Boston Univ
DE ZigBee; IEEE 802.15.4; warwalking; rangefinding; security; Z-Ranger
AB ZigBee wireless networks have become increasingly prevalent over the past decade. Based on the IEEE 802.15.4 low data rate wireless standard, ZigBee offers low-cost mesh connectivity in hospitals, refineries, building automation, and national critical infrastructure. The KillerBee suite of tools is an open source Python-based framework specializing in locating, exploiting, and attacking ZigBee networks. One KillerBee tool in particular, Zbfind, allows a penetration tester to estimate distance to the nearest transceiver based on the received signal strength (RSS). While Zbfind has benefited from recent work, the AT86RF230 transceiver and the underperforming distance estimating parameters fundamentally limit accuracy of the tool set. We present a new tool set for ZigBee distance estimation called Z-Ranger, written in the C programming language and utilizing the Zena wireless adapter hardware. In this paper, we evaluate the accuracy of each tool set for use against real-world indoor and outdoor ZigBee appliances, by comparing actual distance against tool set estimated distance. Collection trials consist of measuring RSS from four indoor and two outdoor wireless sensors at warwalking distances of up to 27 and 101 meters, respectively. RSS samples are measured in 2-meter intervals for the indoor experiment and 5-meter intervals during the outdoor experiment, significantly increasing sample resolution over previous work. Indoor results indicate the Z-Ranger tool set outperforms Zbfind for each target trial, reducing overall mean absolute percentage error (MAPE) by 23.1%. Furthermore, outdoor results conclude Z-Ranger reduces MAPE by 14.5% when compared to Zbfind. Building upon this discovery, we further identify calibrated best-fit distance estimation formulas for Z-Ranger warwalking in both indoor and outdoor environments. When re-evaluated against Zbfind, the new best-fit formulas reduce indoor distance estimation MAPE for Z-Ranger by 36.5% and outdoor MAPE drops by 22.5%. The empirical results presented in this paper demonstrate the accuracy and effectiveness of the new Z-Ranger tool set and offer a complement utility to the KillerBee suite.
C1 [Seitz, Andrew; Ramsey, Benjamin] US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Seitz, A (reprint author), US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
EM andrew.seitz@afit.edu; benjamin.ramsey@afit.edu
NR 25
TC 0
Z9 0
U1 0
U2 0
PU ACAD CONFERENCES LTD
PI NR READING
PA CURTIS FARM, KIDMORE END, NR READING, RG4 9AY, ENGLAND
BN 978-1-910810-83-5
PY 2016
BP 456
EP 465
PG 10
WC Computer Science, Theory & Methods; International Relations
SC Computer Science; International Relations
GA BG7SM
UT WOS:000391660200055
ER
PT J
AU Stone, B
Stone, S
AF Stone, Barron
Stone, Samuel
GP Acad Conf Ltd
TI Comparison of Radio Frequency Based Techniques for Device Discrimination
and Operation Identification
SO PROCEEDINGS OF THE 11TH INTERNATIONAL CONFERENCE ON CYBER WARFARE AND
SECURITY (ICCWS 2016)
LA English
DT Proceedings Paper
CT 11th International Conference on Cyber Warfare and Security (ICCWS)
CY MAR 17-18, 2016
CL Boston Univ, Boston, MA
HO Boston Univ
DE unintentional RF emissions; operation identification; device
discrimination; matched filtering; radio-frequency distinct native
attributes; MSP430
AB Modern worms and viruses that infect supervisory control and data (SCADA) systems, such as the well- known STUXNET attack, may hide their existence by reporting false status to the operator while performing nefarious deeds (Zetter 2011). Therefore, it is necessary to develop methods to monitor semiconductor devices that perform critical tasks and control our infrastructure to verify that they are functioning as expected. Additionally, counterfeit hardware in the supply chain threatens system reliability (Stradley 2006) and the outsourcing of microchip production to foreign countries presents the opportunity for malicious hardware Trojans to be implanted in devices (OUSD 2005). The methods that provide a means of monitoring system operation may also be used to discriminate between authentic and counterfeit/Trojan hardware. This paper presents a comparison of techniques to classify unintentional radio-frequency (RF) emissions (URE) from a microcontroller unit (MCU) for the purposes of discriminating between devices and identifying executed operations. The MSP430F5529 16-bit MCU manufactured by Texas Instruments is evaluated as the device under test (DUT). Non-destructive, non-contact RF signal collection methods are used to acquire URE from 10 same-model devices executing specially designed software routines. The collected emissions are divided into two groups, training and testing signals, which are then processed using a multiple discriminant analysis/maximum likelihood (MDA/ML) classifier with radio-frequency distinct native attribute (RF-DNA) "fingerprints" and a time domain matched filtering technique to develop models (training) and evaluate their effectiveness (testing). The classification aspect of this research performs a one-vs-many comparison to estimate which device produced each test signal, in the case of hardware discrimination, or which instruction was being executed, in the case of operation estimation. Verification utilizes a one-vs-one comparison to validate that an observed RF emission corresponds to an authentic device. Classification and verification results are presented and compared for device discrimination and operation identification using the RF-DNA with MDA/ML and matched filtering techniques.
C1 [Stone, Barron; Stone, Samuel] US Air Force, Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.
RP Stone, B (reprint author), US Air Force, Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.
EM barron.stone@afit.edu; samuel.stone@afit.edu
NR 14
TC 0
Z9 0
U1 0
U2 0
PU ACAD CONFERENCES LTD
PI NR READING
PA CURTIS FARM, KIDMORE END, NR READING, RG4 9AY, ENGLAND
BN 978-1-910810-83-5
PY 2016
BP 475
EP 484
PG 10
WC Computer Science, Theory & Methods; International Relations
SC Computer Science; International Relations
GA BG7SM
UT WOS:000391660200057
ER
PT J
AU Yang, C
Soloviev, A
Veth, M
Blasch, E
AF Yang, Chun
Soloviev, Andrey
Veth, Michael
Blasch, Erik
GP Inst Navigat
TI Simultaneous Frequency Search with a Randomized Dirichlet Kernel for
Fast GPS Signal Acquisition
SO PROCEEDINGS OF THE 29TH INTERNATIONAL TECHNICAL MEETING OF THE SATELLITE
DIVISION OF THE INSTITUTE OF NAVIGATION (ION GNSS+ 2016)
LA English
DT Proceedings Paper
CT 29th International Technical Meeting of
The-Satellite-Division-of-the-Institute-of-Navigation (ION GNSS+)
CY SEP 12-16, 2016
CL Portland, OR
SP Inst Navigat, Satellite Div
AB Signal acquisition in a GPS receiver aims at quickly obtaining coarse estimates of a GPS signal's time and frequency parameters so as to initialize the code and carrier tracking loops for subsequent refined signal estimation. Conventional methods divide the time and frequency uncertainty zone of the signal into a grid of search points and then test each and every search point by correlating the incoming signal samples with those of a local replica generated with the parameters thereof. If several grid points can be checked at the same time per correlation, the uncertainty zone can be swept over quickly, leading to a fast acquisition process.
In this paper, we present a fast acquisition search technique (FAST) via simultaneous search of allowable frequency errors (SAFE). FAST is based on judicious combining of a number of carrier replicas at selected frequency search points, leading to a combined carrier replica (CCR) and a multi-frequency modulated code replica (MMCR). As such, it can reduce the total test points of MN, where M is the number of frequency bins and N is the number of code lags, into M+N. That is, the method achieves fast acquisition using two linear time searches. Optimality criteria and practical methods (a randomized Dirichlet kernel) to reduce implementation loss of CCR and MMCR are described. Simulation and experimental data processing results are presented to demonstrate the functionality and performance of FAST.
C1 [Yang, Chun] Sigtem Technol Inc, San Mateo, CA 94402 USA.
[Soloviev, Andrey] QuNav LLC, Ft Walton Beach, FL USA.
[Veth, Michael] Veth Res Associates LLC, Niceville, FL USA.
[Blasch, Erik] Air Force Res Lab, Wright Patterson AFB, OH USA.
RP Yang, C (reprint author), Sigtem Technol Inc, San Mateo, CA 94402 USA.
NR 27
TC 0
Z9 0
U1 0
U2 0
PU INST NAVIGATION
PI WASHINGTON
PA 815 15TH ST NW, STE 832, WASHINGTON, DC 20005 USA
PY 2016
BP 92
EP 102
PG 11
WC Telecommunications
SC Telecommunications
GA BG7MT
UT WOS:000391479500009
ER
PT J
AU Compton, A
Pecarina, J
AF Compton, Andrew
Pecarina, John
GP Inst Navigat
TI PeerAppear: A P2P Framework for Collaborative Visual Localization
SO PROCEEDINGS OF THE 29TH INTERNATIONAL TECHNICAL MEETING OF THE SATELLITE
DIVISION OF THE INSTITUTE OF NAVIGATION (ION GNSS+ 2016)
LA English
DT Proceedings Paper
CT 29th International Technical Meeting of
The-Satellite-Division-of-the-Institute-of-Navigation (ION GNSS+)
CY SEP 12-16, 2016
CL Portland, OR
SP Inst Navigat, Satellite Div
AB The ubiquity of GPS receivers in modern devices has given rise to the expectation for always-available real-time precision localization. While this expectation can often be met in rural outdoor environments, it is generally not achievable indoors or when line-of-sight to the horizon is blocked by large urban or geographic structures. The shortcomings of GPS have given rise to a myriad of alternative methods for precision navigation, many of which can directly augment GPS. One of the most promising methods builds upon recent advances in computer vision technologies to determine location visually by matching a captured image taken at an unknown location against a database of localized images. The accuracy and scale of these efforts is often determined by the size, scale, and granularity of the image database. Most research efforts focus their database building efforts on small-scale purpose-built collections or on the aggregation of localized crowd-sourced images from services such as Flickr and Instagram. While small-scale purpose built collections are often sufficient for the experimental validation of localization methods, they do not provide for a scalable localization capability. Databases built from crowd-sourced images generally do possess the necessary scale, but lack in quality and granularity because images tend to be densely clustered near landmarks and points of interest. To overcome the challenges encountered when constructing datasets for visual localization, we present PeerAppear, a middleware framework for the extraction and dissemination of visually derived spatial data. Peer Appear enables collaborative visual information discovery through the implementation of a peer-to-peer middleware framework which automates the indexing and sharing of visual information extracted from images in a user's collection. Evaluations of the framework's theoretical complexity and experimental performance are presented, demonstrating PeerAppear's feasibility for supporting large-scale, decentralized collaborative visual localization.
C1 [Compton, Andrew; Pecarina, John] US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Compton, A (reprint author), US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
NR 14
TC 0
Z9 0
U1 0
U2 0
PU INST NAVIGATION
PI WASHINGTON
PA 815 15TH ST NW, STE 832, WASHINGTON, DC 20005 USA
PY 2016
BP 1080
EP 1090
PG 11
WC Telecommunications
SC Telecommunications
GA BG7MT
UT WOS:000391479501009
ER
PT J
AU Montgomery, TJ
Pachter, M
AF Montgomery, Turner J.
Pachter, Meir
GP Inst Navigat
TI Using Converted Linear Measurements Taken by a Human Operator for INS
Aiding
SO PROCEEDINGS OF THE 29TH INTERNATIONAL TECHNICAL MEETING OF THE SATELLITE
DIVISION OF THE INSTITUTE OF NAVIGATION (ION GNSS+ 2016)
LA English
DT Proceedings Paper
CT 29th International Technical Meeting of
The-Satellite-Division-of-the-Institute-of-Navigation (ION GNSS+)
CY SEP 12-16, 2016
CL Portland, OR
SP Inst Navigat, Satellite Div
AB A method for pilot-assisted Inertial Navigation System (INS) aiding is explored in which the pilot detects and tracks a ground feature of unknown position during a short measurement epoch using an Electro-Optical (E/O) sensor. One then refers to Visual-INS. In contrast to current research trends, a human operator is entrusted with tracking the ground feature. This yields a record of bearing measurements of the unknown ground feature taken over time. A non-conventional measurement linearization technique is applied to generate "converted" measurements of the feature position from the successive bearing measurements and the INS estimated aircraft position. A linear regression algorithm is then applied to the converted measurements providing an estimate of the INS horizontal velocity error and horizontal accelerometer biases. At the completion of the measurement epoch, the INS solution is corrected by subtracting out the estimated errors. Aiding the INS in this manner provides a significant improvement in the accuracy of the INS-provided aircraft navigation state estimates when compared to those of a free/unaided INS. A number of scenario are simulated including with and without a constrained flight path, with single vs. multiple ground feature tracking sessions, and with a navigation vs. tactical grade INS. Applications for this E/O sensor enabled autonomous navigation method include navigation in Global Positioning System (GPS) denied environments and/or when RF emitting/receiving sensors are undesirable.(1)
C1 [Montgomery, Turner J.; Pachter, Meir] Air Force Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.
[Montgomery, Turner J.] USAF, Washington, DC 20330 USA.
[Pachter, Meir] AFIT, Wright Patterson AFB, OH USA.
RP Montgomery, TJ (reprint author), Air Force Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.; Montgomery, TJ (reprint author), USAF, Washington, DC 20330 USA.
EM turner.montgomery@afit.edu; meir.pachter@afit.edu
NR 10
TC 0
Z9 0
U1 0
U2 0
PU INST NAVIGATION
PI WASHINGTON
PA 815 15TH ST NW, STE 832, WASHINGTON, DC 20005 USA
PY 2016
BP 1153
EP 1162
PG 10
WC Telecommunications
SC Telecommunications
GA BG7MT
UT WOS:000391479501016
ER
PT J
AU Lemmenes, A
Corbell, P
Gunawardena, S
AF Lemmenes, Adam
Corbell, Phillip
Gunawardena, Sanjeev
GP Inst Navigat
TI Detailed Analysis of the TEXBAT Datasets Using a High Fidelity Software
GPS Receiver
SO PROCEEDINGS OF THE 29TH INTERNATIONAL TECHNICAL MEETING OF THE SATELLITE
DIVISION OF THE INSTITUTE OF NAVIGATION (ION GNSS+ 2016)
LA English
DT Proceedings Paper
CT 29th International Technical Meeting of
The-Satellite-Division-of-the-Institute-of-Navigation (ION GNSS+)
CY SEP 12-16, 2016
CL Portland, OR
SP Inst Navigat, Satellite Div
AB Capable and inexpensive Global Positioning System (GPS) spoofers are more likely to threaten our world today due to increased public awareness, advancement of computing power, and the advent of software defined radio technology. Just recently, the introduction of GNSS enabled augmented reality games such as Pokemon Go, has also contributed significantly to the global interest in GPS spoofing [1]. To combat this threat, several researchers are developing methods of detecting spoofing attacks [2]. Integral to these efforts are the use of pre-recorded spoofing datasets in order to test the methods being developed.
The University of Texas at Austin has published datasets for evaluating spoofing mitigation techniques. These datasets, known as the Texas Spoofing Test Battery (TEXBAT), include eight separate spoofing scenarios. This paper endeavors to offer an addendum to [3, 4] with independent results, observations, and additional commentary regarding the static TEXBAT scenarios as an aid to the community of researchers utilizing this dataset. It is not the intended purpose of this paper to suggest or evaluate anti-spoofing techniques, but rather to inform the community of our observations derived from working with the TEXBAT datasets.
This paper leverages an AFIT-developed high-fidelity software-based GPS receiver known as the GNSS Educational Adjustable Receiver Software (GEARS) to process and investigate the TEXBAT spoofing scenarios. This highly flexible and customizable receiver can be used to very quickly explore many different receiver observables. It is capable of sub sample sized correlator spacing with carrier-aided code tracking, and utilizes a programmable state machine that dynamically reconfigures the tracking loop parameters to achieve a high degree of flexibility and accuracy [5].
Observations include the characterization of power biases and time offsets between scenarios, the discovery of a "global" code and carrier range rate divergence in some scenarios, and an accurate tabulation of the onset of spoofing in each scenario. Artifacts in the RF spectrum are also described.
C1 [Lemmenes, Adam] USAF, GPS Program Off, Washington, DC 20330 USA.
[Corbell, Phillip; Gunawardena, Sanjeev] US Air Force, Inst Technol, Wright Patterson AFB, OH USA.
RP Lemmenes, A (reprint author), USAF, GPS Program Off, Washington, DC 20330 USA.
NR 5
TC 0
Z9 0
U1 0
U2 0
PU INST NAVIGATION
PI WASHINGTON
PA 815 15TH ST NW, STE 832, WASHINGTON, DC 20005 USA
PY 2016
BP 3027
EP 3032
PG 6
WC Telecommunications
SC Telecommunications
GA BG7MT
UT WOS:000391479503007
ER
PT J
AU Havrilla, M
AF Havrilla, M.
GP IEEE
TI Field Decomposition for Analysis of Hyperbolic Media
SO 2016 10TH INTERNATIONAL CONGRESS ON ADVANCED ELECTROMAGNETIC MATERIALS
IN MICROWAVES AND OPTICS (METAMATERIALS)
LA English
DT Proceedings Paper
CT 10th International Congress on Advanced Electromagnetic Materials in
Microwaves and Optics (METAMATERIALS)
CY SEP 19-22, 2016
CL Chania, GREECE
ID ANISOTROPIC MEDIA
AB A field decomposition of Maxwell's equations for uniaxial hyperbolic media based on the 2D Helmholtz theorem is provided. This decomposition is particularly useful since it produces TE and TM field sets that are orthogonal and allows for identification of two independent scalar potential formulations. It is shown that these formulations provide substantial mathematical simplification, enhanced physical insight, ease of boundary condition enforcement and a trivial field recovery process. An example involving a parallel-plate waveguide filled with hyperbolic media is given to demonstrate the functionality and practicality of the decomposition.
C1 [Havrilla, M.] US Air Force, Inst Technol, Dept ECE, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
RP Havrilla, M (reprint author), US Air Force, Inst Technol, Dept ECE, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM michael.havrilla@afit.edu
NR 4
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-5090-1803-1
PY 2016
BP 436
EP 438
PG 3
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BG7MM
UT WOS:000391449400146
ER
PT J
AU Blasch, E
Costa, PCG
De Villiers, JP
Laskey, KB
Llinas, J
Jousselme, AL
AF Blasch, Erik
Costa, Paulo C. G.
De Villiers, J. Pieter
Laskey, Kathryn B.
Llinas, James
Jousselme, Anne-Laure
GP IEEE
TI Pragmatic Data Fusion Uncertainty Concerns: Tribute to Dave L. Hall
SO 2016 19TH INTERNATIONAL CONFERENCE ON INFORMATION FUSION (FUSION)
LA English
DT Proceedings Paper
CT 19th International Conference on Information Fusion (FUSION)
CY JUL 05-08, 2016
CL Heidelberg, GERMANY
SP Robert Bosch GmbH, ATLAS ELEKTRONIK, RANDOM SETS LLC, Syst & Technol Res, Metron, Continental, AIRBUS, BECKHOFF, Springer, Int Soc Informat Fus, Intelligent Sensor Actuator Syst, Karlsruhe Inst Technol, Fraunhofer, VDE, COMO, Conf Catalysts LLC, IEEE, AESS Soc
DE Information Fusion; Level 5 User Refinement; Hard-soft fusion;
Uncertainty Reasoning; URREF; ETURWG
ID RESOURCE-MANAGEMENT
AB Over the course of Dave Hall's career, he highlighted various concerns associated with the implementation of data fusion methods. Many of the issues included the role of uncertainty in data fusion, practical implementation of sensor fusion systems, and incorporating new technology into information fusion designs. These thoughts were communicated through technical books and Handbook collections of articles from authors in the fusion community as comprehensive discussions of data collection and processing to knowledge acquisition and delivery. A summary of the uncertainty issues from Dave Hall, originating with the Joint Directors of the Laboratories (JDL) model, include these attributes across the JDL Levels which are: data (variance), object assessment (covariance), situation (representation), threat (possibility), sensor management (delay), and user (cognition). This paper explores the concepts of uncertainty addressed by Dave Hall from many of his publications that can be used as an anthology of his work.
C1 [Blasch, Erik] US Air Force, Res Lab, Rome, NY 13441 USA.
[Costa, Paulo C. G.; Laskey, Kathryn B.] George Mason Univ, C4I Ctr, Fairfax, VA 22030 USA.
[De Villiers, J. Pieter] Univ Pretoria, CSIR, Pretoria, South Africa.
[Llinas, James] State Univ, Ctr Multisource Informat Fus, Buffalo, NY 14203 USA.
[Jousselme, Anne-Laure] Maritime R&E, NATO STO Ctr, La Spezia, Italy.
RP Blasch, E (reprint author), US Air Force, Res Lab, Rome, NY 13441 USA.
EM erik.blasch.1@us.af.mil; pcosta@c4i.gmu.edu; pieter.devilliers@up.ac.za;
klaskey@c4i.gmu.edu; llinas@buffalo.edu;
Anne-Laure.Jousselme@cmre.nato.int
NR 58
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-0-9964-5274-8
PY 2016
BP 472
EP 479
PG 8
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BG7HA
UT WOS:000391273400065
ER
PT J
AU de Villiers, JP
Jousselme, AL
de Waal, A
Pavlin, G
Laskey, K
Blasch, E
Costa, P
AF de Villiers, J. P.
Jousselme, A. -L.
de Waal, A.
Pavlin, G.
Laskey, K.
Blasch, E.
Costa, P.
GP IEEE
TI Uncertainty evaluation of data and information fusion within the context
of the decision loop
SO 2016 19TH INTERNATIONAL CONFERENCE ON INFORMATION FUSION (FUSION)
LA English
DT Proceedings Paper
CT 19th International Conference on Information Fusion (FUSION)
CY JUL 05-08, 2016
CL Heidelberg, GERMANY
SP Robert Bosch GmbH, ATLAS ELEKTRONIK, RANDOM SETS LLC, Syst & Technol Res, Metron, Continental, AIRBUS, BECKHOFF, Springer, Int Soc Informat Fus, Intelligent Sensor Actuator Syst, Karlsruhe Inst Technol, Fraunhofer, VDE, COMO, Conf Catalysts LLC, IEEE, AESS Soc
AB In this paper, the principle taxonomy of the fusion process, the decision loop, is unified with uncertainty quantification and representation. A typical flow of information in the decision loop takes the form of raw information, uncertainty modelling, combination, and decisions, which corresponds closely with Boyd's Observe, Orient, Decide and Act or OODA loop. The uncertainty associated with modelling during fusion system design was considered in previous works by the authors of this paper. Here, the uncertainties in the combination and decision parts of the information flow are considered. The objective of this paper is to make explicit how uncertainties that arise during design, combine with uncertainties during runtime, as well as the effect these uncertainties have on the ultimate decisions. The uncertainty representation and reasoning framework (URREF) ontology can only be meaningfully used for evaluation when the subjects of evaluation within the fusion system, and more broadly the decision loop, are defined explicitly.
C1 [de Villiers, J. P.] CSIR, Pretoria, South Africa.
[de Villiers, J. P.; de Waal, A.] Univ Pretoria, Pretoria, South Africa.
[Laskey, K.; Costa, P.] George Mason Univ, Fairfax, VA 22030 USA.
[Jousselme, A. -L.] NATO STO Ctr Maritime Res & Experimentat, La Spezia, Italy.
[Blasch, E.] US Air Force, Res Lab, Rome, NY USA.
[Pavlin, G.] Thales Res & Technol, D CIS Lab, Delft, Netherlands.
RP de Villiers, JP (reprint author), CSIR, Pretoria, South Africa.; de Villiers, JP (reprint author), Univ Pretoria, Pretoria, South Africa.
EM jdvilliers1@csir.co.za; Anne-Laure.jousselme@cmre.nato.int;
alta.dewaal@up.ac.za; gregor.pavlin@d-cis.nl; klaskey@gmu.edu;
erik.blasch@rl.af.mil; pcosta@gmu.edu
NR 29
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-0-9964-5274-8
PY 2016
BP 766
EP 773
PG 8
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BG7HA
UT WOS:000391273400103
ER
PT J
AU Ilin, R
Izmailov, R
Goncharov, Y
Streltsov, S
AF Ilin, Roman
Izmailov, Rauf
Goncharov, Yuri
Streltsov, Simon
GP IEEE
TI Fusion of Privileged Features for Efficient Classifier Training
SO 2016 19TH INTERNATIONAL CONFERENCE ON INFORMATION FUSION (FUSION)
LA English
DT Proceedings Paper
CT 19th International Conference on Information Fusion (FUSION)
CY JUL 05-08, 2016
CL Heidelberg, GERMANY
SP Robert Bosch GmbH, ATLAS ELEKTRONIK, RANDOM SETS LLC, Syst & Technol Res, Metron, Continental, AIRBUS, BECKHOFF, Springer, Int Soc Informat Fus, Intelligent Sensor Actuator Syst, Karlsruhe Inst Technol, Fraunhofer, VDE, COMO, Conf Catalysts LLC, IEEE, AESS Soc
DE classification; sensors; support vector machines; SVM; SVM; privileged
information; LUPI; similarity control; knowledge transfer; kernel
functions; regression; ensemble learning
AB within the supervised machine learning framework, classifier performance is significantly affected by the size of training datasets. One of the ways to improve classification accuracy with small training datasets is to utilize additional knowledge about training data that is not present in testing data. In the Learning Using Privileged Information (LUPI) learning paradigm, this additional knowledge is represented by the privileged feature space, which is fused with the standard feature space during classifier training. In this paper, we study two new algorithmic realization of LUPI, based on knowledge transfer, and compare them with the original SVM+ LUPI algorithm, which is based on similarity control. We apply the algorithms to a wide area aerial video exploitation problem, and measure misclassification error rate and execution time of both algorithms. We use minor area motion imagery (MAMI) dataset, recently released by Air Force Research Laboratory (AFRL). High-resolution imagery is utilized as privileged information for low-resolution imagery. We demonstrate that an ensemble knowledge transfer approach that combines multiple knowledge transfer algorithms outperforms the original SVM+ approach with the error rate reduction of up to 25%. We also show that knowledge transfer approach requires significantly less computational resources, making LUPI algorithms as scalable as SVM.
C1 [Ilin, Roman] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Izmailov, Rauf] Appl Commun Sci, Basking Ridge, NJ USA.
[Goncharov, Yuri; Streltsov, Simon] LongShortWay Inc, Boston, MA USA.
RP Ilin, R (reprint author), US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
EM rilin325@gmail.com; rizmailov@appcomsci.com; yuri@longshortway.com;
simon@longshortway.com
NR 22
TC 0
Z9 0
U1 1
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-0-9964-5274-8
PY 2016
BP 1382
EP 1389
PG 8
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BG7HA
UT WOS:000391273400183
ER
PT J
AU Wang, P
Blasch, E
Li, XR
Jones, E
Hanak, R
Yin, WH
Beach, A
Brewer, P
AF Wang, Ping
Blasch, Erik
Li, X. Rong
Jones, Eric
Hanak, Randy
Yin, Weihong
Beach, Allison
Brewer, Paul
GP IEEE
TI Degree of Nonlinearity (DoN) Measure for Target Tracking in Videos
SO 2016 19TH INTERNATIONAL CONFERENCE ON INFORMATION FUSION (FUSION)
LA English
DT Proceedings Paper
CT 19th International Conference on Information Fusion (FUSION)
CY JUL 05-08, 2016
CL Heidelberg, GERMANY
SP Robert Bosch GmbH, ATLAS ELEKTRONIK, RANDOM SETS LLC, Syst & Technol Res, Metron, Continental, AIRBUS, BECKHOFF, Springer, Int Soc Informat Fus, Intelligent Sensor Actuator Syst, Karlsruhe Inst Technol, Fraunhofer, VDE, COMO, Conf Catalysts LLC, IEEE, AESS Soc
AB Performance evaluation of tracking methods includes methods of relative and absolute performance. Absolute tracking performance is the robust end result presented to a user which determines the product solution for real world analysis. However, to achieve robust performance, the tracking method is subject to the sensor data, filtering performance, and associated models, which requires relative performance evaluation. In this paper, we highlight the efficacy of using DoN measure in evaluating video tracking capabilities. Three developments are presented as to the real-world issues associated with the nonlinear video-based tracking: (1) challenges of performance evaluation with real data, (2) approaches to utilize DoN as improvements for relative track evaluation, and (3) operational implementations lessons associated from user-defined operating picture (UDOP) plugins. Results are presented using relevant data with a highlighted tracker.
C1 [Wang, Ping; Hanak, Randy; Yin, Weihong; Beach, Allison; Brewer, Paul] ObjectVideo Inc, 11600 Sunrise Valley Dr, Reston, VA 20191 USA.
[Blasch, Erik; Jones, Eric] US Air Force, Res Lab, Wright Patterson AFB, OH USA.
[Li, X. Rong] Univ New Orleans, Dept Elect Engn, New Orleans, LA 70148 USA.
RP Wang, P (reprint author), ObjectVideo Inc, 11600 Sunrise Valley Dr, Reston, VA 20191 USA.
EM pwang@objectvideo.com; erik.blasch.1@us.af.mil; xli@uno.edu;
eric.jones.42@us.af.mil; rhanak@objectvideo.com; wyin@objectvideo.com;
abeach@objectvideo.com; pbrewer@objectvideo.com
NR 24
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-0-9964-5274-8
PY 2016
BP 1390
EP 1397
PG 8
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BG7HA
UT WOS:000391273400184
ER
PT J
AU Ilin, R
AF Ilin, Roman
GP IEEE
TI Classification with Concept Lattice and Choquet Integral
SO 2016 19TH INTERNATIONAL CONFERENCE ON INFORMATION FUSION (FUSION)
LA English
DT Proceedings Paper
CT 19th International Conference on Information Fusion (FUSION)
CY JUL 05-08, 2016
CL Heidelberg, GERMANY
SP Robert Bosch GmbH, ATLAS ELEKTRONIK, RANDOM SETS LLC, Syst & Technol Res, Metron, Continental, AIRBUS, BECKHOFF, Springer, Int Soc Informat Fus, Intelligent Sensor Actuator Syst, Karlsruhe Inst Technol, Fraunhofer, VDE, COMO, Conf Catalysts LLC, IEEE, AESS Soc
DE Information Fusion; Formal Concept Analysis; Probability; Lattice
Theory; Belief Functions; Capacities; Choquet Integral; Statistical
Pattern Recognition; Decision Theory
AB This contribution explores the link between Formal Concept Analysis and non-additive set functions, called capacities, for pattern classification and decision making. Capacities can be obtained from the Concept Lattice. The use of these functions for decision making, with the help of Choquet integration, is illustrated on a two class classification problem.
C1 [Ilin, Roman] US Air Force, Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
RP Ilin, R (reprint author), US Air Force, Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
EM rilin325@gmail.com
NR 29
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-0-9964-5274-8
PY 2016
BP 1554
EP 1561
PG 8
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BG7HA
UT WOS:000391273400206
ER
PT J
AU Dunik, J
Straka, O
Mallick, M
Blasch, E
AF Dunik, J.
Straka, O.
Mallick, Mahendra
Blasch, Erik
GP IEEE
TI Survey of Nonlinearity and Non-Gaussianity Measures for State Estimation
SO 2016 19TH INTERNATIONAL CONFERENCE ON INFORMATION FUSION (FUSION)
LA English
DT Proceedings Paper
CT 19th International Conference on Information Fusion (FUSION)
CY JUL 05-08, 2016
CL Heidelberg, GERMANY
SP Robert Bosch GmbH, ATLAS ELEKTRONIK, RANDOM SETS LLC, Syst & Technol Res, Metron, Continental, AIRBUS, BECKHOFF, Springer, Int Soc Informat Fus, Intelligent Sensor Actuator Syst, Karlsruhe Inst Technol, Fraunhofer, VDE, COMO, Conf Catalysts LLC, IEEE, AESS Soc
DE Nonlinear filtering; Non-Gaussian filtering; Measures of nonlinearity
and non-Gaussianity
ID EXTENDED KALMAN FILTER; SYSTEMS; STABILITY
AB The paper addresses state estimation of nonlinear stochastic dynamic systems. In particular, the stress is laid on the selection and performance monitoring of estimators based on measures assessing the validity of the assumptions under which the estimators have been proposed. The main focus is placed on summary and unification of the measures of nonlinearity and non-Gaussianity which might be used in state estimation. Discussions include analysis of the measures for stability, consistency, and validity. Using both local and global measures of nonlinearity (MoNL) include differential geometry, least squares, and convex optimisation while measures of non-Gaussianity (MoNG) include moment matching and volume differencing.
C1 [Dunik, J.; Straka, O.] Univ West Bohemia, Dept Cybernet, Univ 8, Plzen 30614, Czech Republic.
[Blasch, Erik] US Air Force, Res Lab, Rome, NY 13441 USA.
RP Dunik, J (reprint author), Univ West Bohemia, Dept Cybernet, Univ 8, Plzen 30614, Czech Republic.
EM dunikj@kky.zcu.cz; straka30@kky.zcu.cz; mahendra.mallick@gmail.com;
erik.blasch.1@us.af.mil
NR 39
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-0-9964-5274-8
PY 2016
BP 1845
EP 1852
PG 8
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BG7HA
UT WOS:000391273400245
ER
PT J
AU Kang, K
Maroulas, V
Schizas, ID
Blasch, E
AF Kang, Kai
Maroulas, Vasileios
Schizas, Ioannis D.
Blasch, Erik
GP IEEE
TI A multilevel homotopy MCMC sequential Monte Carlo filter for
multi-target tracking
SO 2016 19TH INTERNATIONAL CONFERENCE ON INFORMATION FUSION (FUSION)
LA English
DT Proceedings Paper
CT 19th International Conference on Information Fusion (FUSION)
CY JUL 05-08, 2016
CL Heidelberg, GERMANY
SP Robert Bosch GmbH, ATLAS ELEKTRONIK, RANDOM SETS LLC, Syst & Technol Res, Metron, Continental, AIRBUS, BECKHOFF, Springer, Int Soc Informat Fus, Intelligent Sensor Actuator Syst, Karlsruhe Inst Technol, Fraunhofer, VDE, COMO, Conf Catalysts LLC, IEEE, AESS Soc
DE Sequential Monte Carlo filters; homotopy; Markov chain Monte Carlo;
multi-target tracking
ID PARTICLE FILTERS
AB In this paper, we propose an enhanced sequential Monte Carlo filter through the design of a sophisticated Markov chain Monte Carlo (MCMC) procedure. This MCMC procedure is appended after the resampling step of the generic sequential Monte Carlo filter to efficiently resolve the degeneracy of the algorithm. In this work, we use the effective sample size as a learning criterion to monitor the levels of homotopy in the MCMC procedure at each time instant so that the computational cost is reduced without undermining the accuracy of estimation. We test the algorithm on a multi-target tracking problem and compared to other contemporary approaches such as the bootstrap particle filter and the auxiliary particle filter (APF). Based on two scenarios, the proposed algorithm is administrated to have a significant increase in accuracy.
C1 [Kang, Kai; Maroulas, Vasileios] Univ Tennessee, Dept Math, Knoxville, TN 37996 USA.
[Schizas, Ioannis D.] Univ Texas Arlington, Dept Elect Engn, Arlington, TX 76010 USA.
[Blasch, Erik] US Air Force, Res Lab, Rome, NY 14330 USA.
RP Kang, K (reprint author), Univ Tennessee, Dept Math, Knoxville, TN 37996 USA.
EM kang@math.utk.edu; vmaroula@utk.edu; schizas@uta.edu;
erik.blasch.1@us.af.mil
NR 27
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-0-9964-5274-8
PY 2016
BP 2015
EP 2021
PG 7
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BG7HA
UT WOS:000391273400268
ER
PT S
AU Lin, CL
Shen, WW
Drager, S
AF Lin, Chung-Ling
Shen, Wuwei
Drager, Steven
GP IEEE
TI A Framework To Support Generation and Maintenance of An Assurance Case
SO 2016 IEEE 27TH INTERNATIONAL SYMPOSIUM ON SOFTWARE RELIABILITY
ENGINEERING WORKSHOPS (ISSREW)
SE IEEE International Symposium on Software Reliability Engineering
Workshops
LA English
DT Proceedings Paper
CT 27th IEEE International Symposium on Software Reliability Engineering
(ISSRE)
CY OCT 23-27, 2016
CL Ottawa, CANADA
SP IEEE, Carleton Univ, IEEE Comp Soc, Carleton Univ, Fac Engn & Design, Reliabil Soc
DE assurance model; safety pattern; model transformation; safety critical
system
AB One of the greatest challenges in software intensive systems such as safety critical systems is to ensure software quality assurance (called software assurance for brevity) which encompasses some quality-related attributes such as reliability and security as well as functionality and performance. To this end, engineers prefer a safety case or an assurance case, via Goal Structuring Notation (GSN) to convey the information about software assurance in a system during its development. An assurance case, similar to a legal case, lays out an argumentation-structure with supporting evidence to claim that software assurance in a system is achieved. However, due to complexity of software intensive applications especially heterogeneity of artifacts used as evidence, the creation and management of an assurance case become a challenging issue facing the safety critical domains. In this report, we present a novel framework to automatically generate an assurance case via a safety pattern and further support the maintenance of an assurance case during a system's evolution. Last, we use the Wheel Brake System (WBS) for an aircraft as a case study to illustrate the construction and maintenance of a safety case during a system's evolution.
C1 [Lin, Chung-Ling; Shen, Wuwei] Western Michigan Univ, Dept Comp Sci, Kalamazoo, MI 49008 USA.
[Drager, Steven] US Air Force, Res Lab, Rome, NY USA.
RP Lin, CL (reprint author), Western Michigan Univ, Dept Comp Sci, Kalamazoo, MI 49008 USA.
EM chung-ling.lin@wmich.edu; wuwei.shen@wmich.edu; steven.drager@us.af.mil
NR 10
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2375-821X
BN 978-1-5090-3601-1
J9 IEEE INT SYMP SOFTW
PY 2016
BP 21
EP 24
DI 10.1109/ISSREW.2016.46
PG 4
WC Computer Science, Software Engineering; Engineering, Electrical &
Electronic
SC Computer Science; Engineering
GA BG7JT
UT WOS:000391391100006
ER
PT S
AU Chen, W
Hong, L
Shetty, S
Lo, D
Cooper, R
AF Chen, Wei
Hong, Liang
Shetty, Sachin
Lo, Dan
Cooper, Reginald
GP IEEE
TI Cross-layered Security Approach with Compromised Nodes Detection in
Cooperative Sensor Networks
SO 2016 IEEE 30TH INTERNATIONAL PARALLEL AND DISTRIBUTED PROCESSING
SYMPOSIUM WORKSHOPS (IPDPSW)
SE IEEE International Symposium on Parallel and Distributed Processing
Workshops
LA English
DT Proceedings Paper
CT 30th IEEE International Parallel and Distributed Processing Symposium
(IPDPS)
CY MAY 23-27, 2016
CL Illinois Inst Technol, Chicago, IL
SP IEEE, IEEE Comp Soc, Tech Comm Parallel Proc, ACM SIGARCH, IEEE Comp Soc Tech Comm Comp Architecture, IEEE Comp Soc Tech Comm Distributed Proc
HO Illinois Inst Technol
DE cooperative MIMO radios; cryptography; beam-forming; information theory;
security of wireless communication
ID WIRELESS COMMUNICATIONS; MIMO; TRANSMIT; COMMUNICATION; SCHEME
AB Cooperative MIMO communication is a promising technology which enables realistic solution for improving communication performance with MIMO technique in wireless networks that are composed of size and cost constrained devices. However, the security problems inherent to cooperative communication also arise. Cryptography can ensure the confidentiality in the communication and routing between authorized participants, but it usually cannot prevent the attacks from compromised nodes which may corrupt communications by sending garbled signals. In this paper, we propose a cross-layered approach to enhance the security in query-based cooperative MIMO sensor networks. The approach combines efficient cryptographic technique implemented in upper layer with a novel information theory based compromised nodes detection algorithm in physical layer. In the detection algorithm, a cluster of K cooperative nodes are used to identify up to K - 1 active compromised nodes. When the compromised nodes are detected, the key revocation is performed to isolate the compromised nodes and reconfigure the cooperative MIMO sensor network. During this process, beamforming is used to avoid the information leaking. The proposed security scheme can be easily modified and applied to cognitive radio networks. Simulation results show that the proposed algorithm for compromised nodes detection is effective and efficient, and the accuracy of received information is significantly improved.
C1 [Chen, Wei] Tennessee State Univ, Dept Comp Sci, Nashville, TN 37209 USA.
[Hong, Liang; Shetty, Sachin] Tennessee State Univ, Dept Elect & Comp Engn, Nashville, TN 37209 USA.
[Lo, Dan] Kennesaw State Univ, Dept Comp Sci, Kennesaw, GA 30144 USA.
[Cooper, Reginald] US Air Force, Res Lab, London, OH USA.
RP Chen, W (reprint author), Tennessee State Univ, Dept Comp Sci, Nashville, TN 37209 USA.
EM wchen@tnstate.edu; lhong@tnstate.edu; sshetty@tnstate.edu;
dlo2@kennesaw.edu; reginald.cooper.2@us.af.mil
OI Shetty, Sachin/0000-0002-8789-0610
NR 27
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2164-7062
BN 978-1-5090-3682-0
J9 IEEE SYM PARA DISTR
PY 2016
BP 499
EP 508
DI 10.1109/IPDPSW.2016.88
PG 10
WC Computer Science, Hardware & Architecture; Computer Science, Theory &
Methods
SC Computer Science
GA BG7FR
UT WOS:000391253600061
ER
PT S
AU Millar, JR
Hodson, DD
Seymour, R
AF Millar, Jeremy R.
Hodson, Douglas D.
Seymour, Richard
GP IEEE
TI Deriving LVC State Synchronization Parameters from Interaction
Requirements
SO 2016 IEEE/ACM 20TH INTERNATIONAL SYMPOSIUM ON DISTRIBUTED SIMULATION AND
REAL TIME APPLICATIONS (DS-RT)
SE IEEE ACM International Symposium on Distributed Simulation and Real-Time
Applications
LA English
DT Proceedings Paper
CT 20th IEEE/ACM International Symposium on Distributed Simulation and Real
Time Applications (DS-RT)
CY SEP 21-23, 2016
CL London, ENGLAND
SP IEEE, IEEE Comp Soc, ACM SIGSIM, Brunel Univ
ID UPDATE
AB Choosing synchronization update parameters for live, virtual, constructive simulations is of particular importance when the simulation is supporting engineering test and evaluation events. Failure to choose these parameters appropriately can lead to substantial data quality problems. This work introduces the notion of plausibility limits for entity interactions based on spatial errors derived from state variable divergence. Moreover, it presents a state update model that provides probabilistic guarantees on meeting interaction requirements expressed as plausibility limits. Finally, it presents an example of these guarantees based on entity state data sampled from a popular online game.
C1 [Millar, Jeremy R.; Hodson, Douglas D.; Seymour, Richard] US Air Force, Inst Technol, Dayton, OH 45344 USA.
RP Millar, JR (reprint author), US Air Force, Inst Technol, Dayton, OH 45344 USA.
EM jmillar@afit.edu; dhodson@afit.edu; rseymour@afit.edu
NR 23
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1550-6525
BN 978-1-5090-3505-2
J9 IEEE ACM DIS SIM
PY 2016
BP 85
EP 91
DI 10.1109/DS-RT.2016.32
PG 7
WC Computer Science, Hardware & Architecture; Computer Science, Software
Engineering
SC Computer Science
GA BG7PW
UT WOS:000391589800010
ER
PT S
AU Yan, S
Greenwood, AD
Jin, JM
AF Yan, Su
Greenwood, Andrew D.
Jin, Jian-Ming
GP IEEE
TI Nonlinear Modeling of Plasma Shielding Effect During High-Power
Microwave Breakdown
SO 2016 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM
SE IEEE Antennas and Propagation Society International Symposium
LA English
DT Proceedings Paper
CT IEEE-Antennas-and-Propagation-Society International Symposium
CY JUN 26-JUL 01, 2016
CL Fajardo, PR
SP Inst Elect & Elect Engineers Antennas & Propagat Soc, Inst Elect & Elect Engineers
AB The high-power microwave (HPM) breakdown in air would result in a sharp increase of the number density of the plasma, which generates strong secondary electromagnetic ( EM) fields that can cancel the incident fields and act like a macroscopic plasma shield. If such an air breakdown takes place in a HPM device, it will result in the so-called tail erosion and severely limit the performance of the device. In this paper, the EM-plasma interaction and the HPM air breakdown are modeled by a coupled nonlinear EM-plasma system, which is solved by a coupled nodal discontinuous Galerkin time-domain (DGTD) scheme. The air breakdown and plasma formation in a metallic aperture are simulated to demonstrate the capability of the DGTD method in the modeling of HPM breakdown problems.
C1 [Yan, Su; Jin, Jian-Ming] Univ Illinois, Urbana, IL 61801 USA.
[Greenwood, Andrew D.] Air Force Res Lab, Kirtland AFB, NM 87117 USA.
RP Yan, S (reprint author), Univ Illinois, Urbana, IL 61801 USA.
EM suyan@illinois.edu; icepic.afrl@us.af.mil; j-jin1@illinois.edu
NR 2
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1522-3965
BN 978-1-5090-2886-3
J9 IEEE ANTENNAS PROP
PY 2016
BP 627
EP 628
PG 2
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BG3XZ
UT WOS:000388377100303
ER
PT S
AU Champion, M
Tomasic, B
AF Champion, Michelle
Tomasic, Boris
GP IEEE
TI A Novel Method for Computing Element Patterns in Large/Complex Periodic
Circular/Cylindrical Arrays
SO 2016 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM
SE IEEE Antennas and Propagation Society International Symposium
LA English
DT Proceedings Paper
CT IEEE-Antennas-and-Propagation-Society International Symposium
CY JUN 26-JUL 01, 2016
CL Fajardo, PR
SP Inst Elect & Elect Engineers Antennas & Propagat Soc, Inst Elect & Elect Engineers
AB As known, element patterns of large planar arrays can be calculated from an infinite array approximation using a Floquet unit cell approach. For large conformal arrays, however, unit cell methods can't be used, and element patterns must be calculated numerically by solving the full boundary value problem, leading to a prohibitively large number of unknowns. In this work we describe a novel method for computing element patterns in large and complex periodic arrays with rotational symmetry. The method is based on phase sequence excitation of the array elements in a radial unit cell, and therefore it is very efficient and reduces the memory requirements. It can be easily implemented using parallel processing, thus it can be interpreted as a domain decomposition method in phase-space.
C1 [Champion, Michelle; Tomasic, Boris] Air Force Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
RP Champion, M (reprint author), Air Force Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
EM michelle.champion@us.af.mil; boris.tomasic@us.af.mil
NR 2
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1522-3965
BN 978-1-5090-2886-3
J9 IEEE ANTENNAS PROP
PY 2016
BP 771
EP 772
PG 2
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BG3XZ
UT WOS:000388377100373
ER
PT S
AU Ayoub, FN
Tawk, Y
Costantine, J
Christodoulou, CG
Lane, S
Murrell, D
AF Ayoub, F. N.
Tawk, Y.
Costantine, J.
Christodoulou, C. G.
Lane, Steven
Murrell, David
GP IEEE
TI W/V-band Reconfigurable Array Using Highly Anisotropic Liquid Crystals
SO 2016 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM
SE IEEE Antennas and Propagation Society International Symposium
LA English
DT Proceedings Paper
CT IEEE-Antennas-and-Propagation-Society International Symposium
CY JUN 26-JUL 01, 2016
CL Fajardo, PR
SP Inst Elect & Elect Engineers Antennas & Propagat Soc, Inst Elect & Elect Engineers
AB a Liquid Crystal (LC) based reconfigurable antenna array design at W/V-band is presented in this paper. The array exhibits both frequency tuning and beam steering due to the dielectric anisotropy of the LC at microwave frequencies. The design of the array is optimized to ensure reconfiguration while having the least number of connections to DC sources. The array is fed using a Grounded Coplanar Waveguide (GCPW) feed.
C1 [Ayoub, F. N.; Tawk, Y.; Costantine, J.; Christodoulou, C. G.] Univ New Mexico, COSMIAC, Albuquerque, NM 87131 USA.
[Lane, Steven; Murrell, David] US Air Force, Space Vehicles Directorate, Res Lab, Kirtland AFB, NM 87117 USA.
RP Ayoub, FN (reprint author), Univ New Mexico, COSMIAC, Albuquerque, NM 87131 USA.
EM fayoub00@unm.edu
NR 5
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1522-3965
BN 978-1-5090-2886-3
J9 IEEE ANTENNAS PROP
PY 2016
BP 795
EP 796
PG 2
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BG3XZ
UT WOS:000388377100385
ER
PT S
AU Pan, XY
Christodoulou, CG
Lawrance, J
AF Pan, Xuyuan
Christodoulou, Christos G.
Lawrance, Julie
GP IEEE
TI Design of High Power Microwave Antennas Using 3D Printing Technology
SO 2016 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM
SE IEEE Antennas and Propagation Society International Symposium
LA English
DT Proceedings Paper
CT IEEE-Antennas-and-Propagation-Society International Symposium
CY JUN 26-JUL 01, 2016
CL Fajardo, PR
SP Inst Elect & Elect Engineers Antennas & Propagat Soc, Inst Elect & Elect Engineers
AB Complementary-split-ring (CSR) Slotted Waveguide Antennas have been proven to be critical to high-power-microwave (HPM) systems, due to their compact size, high gain and high power-handling capability. CSR-SWA designs depend on highly accurate electromagnetic simulations that take geometric details into full account. Conventional antenna manufacturing approaches such as direct machining and platelet technology lack the ability to precisely translate the electromagnetic simulation model into its physical metallization. To rapidly prototype complex 3D antenna structures in a cost-effective way, we propose an approach applying stereolithography or 3D printing technology. An S-band CSR-SWA printed on acrylonitrile butadiene styrene ( ABS) and coated with metallic paint is tested. It is shown that 3D printing is capable of providing manufacturing precision for CSR-SWAs that makes fast prototyping of CSR-SWAs for HPM applications possible.
C1 [Pan, Xuyuan; Christodoulou, Christos G.] Univ New Mexico, Dept Elect & Comp Engn, Configurable Space Microsyst Innovat & Applicat C, Albuquerque, NM 87131 USA.
[Lawrance, Julie] Air Force Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA.
RP Pan, XY (reprint author), Univ New Mexico, Dept Elect & Comp Engn, Configurable Space Microsyst Innovat & Applicat C, Albuquerque, NM 87131 USA.
NR 3
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1522-3965
BN 978-1-5090-2886-3
J9 IEEE ANTENNAS PROP
PY 2016
BP 821
EP 822
PG 2
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BG3XZ
UT WOS:000388377100398
ER
PT S
AU Iftikhar, A
Parrow, JM
Asif, SM
Sajal, SZ
Braaten, BD
Allen, J
Allen, M
Wenner, B
AF Iftikhar, A.
Parrow, J. M.
Asif, S. M.
Sajal, S. Z.
Braaten, B. D.
Allen, J.
Allen, M.
Wenner, B.
GP IEEE
TI A Printed Dipole Reconfigured with Magneto-Static Responsive Structures
that do not Require a Directly Connected Biasing Circuit
SO 2016 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM
SE IEEE Antennas and Propagation Society International Symposium
LA English
DT Proceedings Paper
CT IEEE-Antennas-and-Propagation-Society International Symposium
CY JUN 26-JUL 01, 2016
CL Fajardo, PR
SP Inst Elect & Elect Engineers Antennas & Propagat Soc, Inst Elect & Elect Engineers
AB An initial study of novel Magneto-static Responsive Structures (MRSs) and their application to the frequency reconfigurability of a printed dipole antenna is presented here. The embodiment of the MRSs consisted of a cylindrical cavity with a diameter of 0.9 mm drilled into a 20.0 mil thick 1.5 mm x 1.5 mm TMM4 substrate. The cavities were partially filled with silver coated magnetic particles and covered on the top and bottom with copper tape. The conducting magnetic particles responded to an externally applied magnetic field and formed columns in the direction of the magnetic field lines. The columns connected the top and bottom conducting planes, acting as a switch. It was demonstrated that the electrical length of an antenna could be changed and the resonant frequencies could be reconfigured from 1.5 GHz to 1.9 GHz by incorporating the MRSs into the dipole antenna and controlling the ON and OFF states of the MRS switch. Overall, it was shown that the simulated results agreed well with the measurements. It was also demonstrated that the proposed MRSs do not need directly connected biasing circuitry, making them particularly useful for complex antenna designs.
C1 [Iftikhar, A.; Parrow, J. M.; Asif, S. M.; Sajal, S. Z.; Braaten, B. D.] North Dakota State Univ, Elect & Comp Engn, Fargo, ND 58102 USA.
[Allen, J.; Allen, M.] AFRL RWMFT Air Force Res, Lab Munit Directorate, Eglin AFB, FL USA.
[Wenner, B.] US Air Force, Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45432 USA.
RP Braaten, BD (reprint author), North Dakota State Univ, Elect & Comp Engn, Fargo, ND 58102 USA.
EM ben.braaten@ieee.org
NR 2
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1522-3965
BN 978-1-5090-2886-3
J9 IEEE ANTENNAS PROP
PY 2016
BP 1057
EP 1058
PG 2
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BG3XZ
UT WOS:000388377100513
ER
PT S
AU Zemba, M
Nessel, J
Houts, J
Tarasenko, N
Lane, S
Murrell, D
AF Zemba, Michael
Nessel, James
Houts, Jacquelynne
Tarasenko, Nicholas
Lane, Steven
Murrell, David
GP IEEE
TI Preliminary Results from the AFRL-NASA W/V-Band Terrestrial Link
Experiment in Albuquerque, NM
SO 2016 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM
SE IEEE Antennas and Propagation Society International Symposium
LA English
DT Proceedings Paper
CT IEEE-Antennas-and-Propagation-Society International Symposium
CY JUN 26-JUL 01, 2016
CL Fajardo, PR
SP Inst Elect & Elect Engineers Antennas & Propagat Soc, Inst Elect & Elect Engineers
DE millimeter wave propagation; propagation losses; radiowave propagation
AB Atmospheric propagation models and the measurements that train them are critical to the design of efficient and effective space-ground links. As communication systems advance to higher frequencies in search of higher data rates and open spectrum, a lack data at these frequencies necessitates new measurements to properly develop, validate, and refine the models used for link budgeting and system design. In collaboration with the Air Force Research Laboratory (AFRL), NASA Glenn Research Center has deployed the W/V-band Terrestrial Link Experiment (WTLE) in Albuquerque, NM to conduct a measurement campaign at 72 and 84 GHz, among the first atmospheric propagation measurements at these frequencies. WTLE has been operational since October 1, 2015, and the system design shall be herein discussed alongside preliminary results and performance.
C1 [Zemba, Michael; Nessel, James; Houts, Jacquelynne] NASA, Glenn Res Ctr, Adv High Frequency Branch, Cleveland, OH 44135 USA.
[Tarasenko, Nicholas; Lane, Steven; Murrell, David] US Air Force, Space Vehicles Directorate, Res Lab, Kirtland AFB, Albuquerque, NM USA.
RP Zemba, M (reprint author), NASA, Glenn Res Ctr, Adv High Frequency Branch, Cleveland, OH 44135 USA.
NR 5
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1522-3965
BN 978-1-5090-2886-3
J9 IEEE ANTENNAS PROP
PY 2016
BP 1249
EP 1250
PG 2
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BG3XZ
UT WOS:000388377100604
ER
PT S
AU Tarasenko, NP
Lane, SA
Murrell, DA
Christodoulou, C
Nessel, J
Zemba, M
Houts, J
AF Tarasenko, Nicholas P.
Lane, Steven A.
Murrell, David A.
Christodoulou, Christos
Nessel, James
Zemba, Michael
Houts, Jacquelynne
GP IEEE
TI W/V-band Terrestrial Link Experiment, an Overview
SO 2016 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM
SE IEEE Antennas and Propagation Society International Symposium
LA English
DT Proceedings Paper
CT IEEE-Antennas-and-Propagation-Society International Symposium
CY JUN 26-JUL 01, 2016
CL Fajardo, PR
SP Inst Elect & Elect Engineers Antennas & Propagat Soc, Inst Elect & Elect Engineers
DE WTLE; W/V-band; atmospheric propagation
AB The Air Force Research Laboratory in partnership with NASA Glenn Research Center and the University of New Mexico have initiated the W/V-band Terrestrial Link Experiment (WTLE) to conduct propagation analysis at W/V-band frequencies. An overview is provided of the system and ancillary equipment to facilitate the propagation experiment.
C1 [Tarasenko, Nicholas P.; Lane, Steven A.; Murrell, David A.] US Air Force, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87123 USA.
[Christodoulou, Christos] Univ New Mexico, Albuquerque, NM 87131 USA.
[Nessel, James; Zemba, Michael; Houts, Jacquelynne] NASA, Glenn Res Ctr, Cleveland, OH USA.
RP Tarasenko, NP (reprint author), US Air Force, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87123 USA.
EM nicholas.tarasenko@us.af.mil
NR 6
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1522-3965
BN 978-1-5090-2886-3
J9 IEEE ANTENNAS PROP
PY 2016
BP 1259
EP 1260
PG 2
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BG3XZ
UT WOS:000388377100609
ER
PT S
AU Herscovici, N
Champion, M
AF Herscovici, Naftali
Champion, Michelle
GP IEEE
TI Considerations in the Design of Parallel Plate Luneburg Beamformers and
Cylindrical Arrays
SO 2016 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM
SE IEEE Antennas and Propagation Society International Symposium
LA English
DT Proceedings Paper
CT IEEE-Antennas-and-Propagation-Society International Symposium
CY JUN 26-JUL 01, 2016
CL Fajardo, PR
SP Inst Elect & Elect Engineers Antennas & Propagat Soc, Inst Elect & Elect Engineers
AB We present a new concept for a low-profile, low cost integrated multi-beam cylindrical array. It consists of a parallel plate 2D Luneburg beamformer feeding a cylindrical aperture. The concept incorporates a number of novel features, such as low profile, and highly directive excitations. All these features are introduced in order to reduce volume, weight and ultimately cost. The paper discusses the various challenges this concept presents, and ways to mitigate these difficulties.
C1 [Herscovici, Naftali; Champion, Michelle] US Air Force, Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
RP Herscovici, N (reprint author), US Air Force, Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
EM naftali.herscovici.2@us.af.mil; michelle.champion@us.af.mil
NR 2
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1522-3965
BN 978-1-5090-2886-3
J9 IEEE ANTENNAS PROP
PY 2016
BP 1349
EP 1350
PG 2
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BG3XZ
UT WOS:000388377100652
ER
PT S
AU Wright, M
Ali, M
Baron, W
Miller, J
Tuss, J
Zeppettella, D
AF Wright, M.
Ali, M.
Baron, W.
Miller, J.
Tuss, J.
Zeppettella, D.
GP IEEE
TI Effect of Bias Traces and Wires on a MEMS Reconfigurable Pixelated Patch
Antenna
SO 2016 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM
SE IEEE Antennas and Propagation Society International Symposium
LA English
DT Proceedings Paper
CT IEEE-Antennas-and-Propagation-Society International Symposium
CY JUN 26-JUL 01, 2016
CL Fajardo, PR
SP Inst Elect & Elect Engineers Antennas & Propagat Soc, Inst Elect & Elect Engineers
ID LINKS
AB The simulated studies showing the effect of DC bias lines on an aperture coupled reconfigurable pixelated patch antenna for CLAS applications is presented. The simulations show significant deterioration in S11 and gain for all operating modes when copper bias wires are introduced. A solution utilizing very high sheet resistance bias lines in place of copper traces is proposed.
C1 [Wright, M.; Ali, M.] Univ South Carolina, Dept Elect Engn, Columbia, SC 29208 USA.
[Baron, W.; Miller, J.; Tuss, J.; Zeppettella, D.] US Air Force, Aerosp Syst Directorate, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Wright, M (reprint author), Univ South Carolina, Dept Elect Engn, Columbia, SC 29208 USA.
EM wrigh297@email.sc.edu; alimo@cec.sc.edu; william.baron.1@us.af.mil;
Jason.miller.ctr@us.af.mil; james.tuss@us.af.mil;
david.zeppettella@us.af.mil
NR 6
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1522-3965
BN 978-1-5090-2886-3
J9 IEEE ANTENNAS PROP
PY 2016
BP 1429
EP 1430
PG 2
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BG3XZ
UT WOS:000388377100691
ER
PT S
AU Murrell, DA
Lane, SA
Tarasenko, NP
Christodoulou, C
AF Murrell, David A.
Lane, Steven A.
Tarasenko, Nicholas P.
Christodoulou, Christos
GP IEEE
TI A Review of Spaced Based RF Propagation Experiments and Examination of a
New Interest in W/V Band (40-110 GHz) Studies
SO 2016 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM
SE IEEE Antennas and Propagation Society International Symposium
LA English
DT Proceedings Paper
CT IEEE-Antennas-and-Propagation-Society International Symposium
CY JUN 26-JUL 01, 2016
CL Fajardo, PR
SP Inst Elect & Elect Engineers Antennas & Propagat Soc, Inst Elect & Elect Engineers
ID PATHS
AB V and W band frequencies are becoming increasingly more interesting to system designers as the demand for communications bandwidth continues to grow. Regulated applications of the RF spectrum in these bands are few and provide an opportunity for new applications at high data rates. We review the current interest at these frequencies and the previous orbital experiments designed to conduct long term RF attenuation measurement studies. Lastly, we discuss the outstanding research questions in V and W band necessary for future communication system development.
C1 [Murrell, David A.; Lane, Steven A.; Tarasenko, Nicholas P.] US Air Force, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
[Christodoulou, Christos] Univ New Mexico, Dept Elect & Comp Engn, Albuquerque, NM 87131 USA.
RP Murrell, DA (reprint author), US Air Force, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
EM david.murrell@us.af.mil
NR 11
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1522-3965
BN 978-1-5090-2886-3
J9 IEEE ANTENNAS PROP
PY 2016
BP 1527
EP 1528
PG 2
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BG3XZ
UT WOS:000388377100739
ER
PT S
AU Zeppettella, DL
Ali, M
AF Zeppettella, David L.
Ali, Mohammod
GP IEEE
TI VHF Antenna for Airfoil Structural Integration
SO 2016 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM
SE IEEE Antennas and Propagation Society International Symposium
LA English
DT Proceedings Paper
CT IEEE-Antennas-and-Propagation-Society International Symposium
CY JUN 26-JUL 01, 2016
CL Fajardo, PR
SP Inst Elect & Elect Engineers Antennas & Propagat Soc, Inst Elect & Elect Engineers
DE VHF; conformal; antenna; structural
AB The analyses and design of a conformal VHF antenna is introduced for airfoil structural integration. By investigating and optimizing two conducting plates, stubs, and a slot a broadband design covering the frequency range of 95-241 MHz is achieved.
C1 [Zeppettella, David L.] AFRL, Aerosp Syst Directorate, Wright Patterson AFB, OH USA.
[Ali, Mohammod] Univ South Carolina, Dept Elect Engn, Columbia, SC 29208 USA.
RP Zeppettella, DL (reprint author), AFRL, Aerosp Syst Directorate, Wright Patterson AFB, OH USA.
EM david.zeppettella@us.af.mil; alimo@cec.sc.edu
NR 4
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1522-3965
BN 978-1-5090-2886-3
J9 IEEE ANTENNAS PROP
PY 2016
BP 1861
EP 1862
PG 2
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BG3XZ
UT WOS:000388377100903
ER
PT S
AU Tomasic, B
Maxwell, K
Wheatcroft, J
McNeely, C
AF Tomasic, Boris
Maxwell, Kasandra
Wheatcroft, Justin
McNeely, Charlie
GP IEEE
TI CEM-Based Extraction Method for Measuring Complex Permittivity
SO 2016 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM
SE IEEE Antennas and Propagation Society International Symposium
LA English
DT Proceedings Paper
CT IEEE-Antennas-and-Propagation-Society International Symposium
CY JUN 26-JUL 01, 2016
CL Fajardo, PR
SP Inst Elect & Elect Engineers Antennas & Propagat Soc, Inst Elect & Elect Engineers
AB A common way to determine the electromagnetic properties of dielectric materials is to insert a sample of the material into a waveguide and measure the resulting reflection and transmission, i.e. the S-parameters. From the S-parameters the complex permittivity, epsilon can then be extracted by use of various inversion schemes/algorithms, such as Nicolson-Ross-Weir (NRW) method. However, the NRW method is known to have inherently poor accuracy for high-permittivity materials. To mitigate this deficiency, here we propose an alternative approach for material parameter extraction. The novel method is based on measured S-parameter data and computational electromagnetics (CEM) simulation. In this method there is no restrictions on the shape and size of the material under test (MUT), as long as it fits in the waveguide and can be modeled with the CEM codes. In addition, the MUT does not have to be a single dielectric sample but it may be part of a combined metal/dielectric structure. We demonstrated this approach by measuring the complex permittivity of titanium dioxide (TiO2) ceramic samples, with typical relative permittivity of 100.
C1 [Tomasic, Boris; Maxwell, Kasandra] US Air Force, Sensors Directorate, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Wheatcroft, Justin; McNeely, Charlie] BarrieHill Res Corp, 7735 Paragon Rd, Dayton, OH 45459 USA.
RP Tomasic, B (reprint author), US Air Force, Sensors Directorate, Res Lab, Wright Patterson AFB, OH 45433 USA.
EM boris.tomasic@us.af.mil; kasandra.maxwell.1@us.af.mil;
justin.wheatcroft.ctr@us.af.mil
NR 4
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1522-3965
BN 978-1-5090-2886-3
J9 IEEE ANTENNAS PROP
PY 2016
BP 1983
EP 1984
PG 2
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BG3XZ
UT WOS:000388377100964
ER
PT S
AU Uber, R
Wood, A
AF Uber, Richard
Wood, Aihua
GP IEEE
TI Transient Scattering from Two Cavities Embedded in a Ground Plane
SO 2016 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM
SE IEEE Antennas and Propagation Society International Symposium
LA English
DT Proceedings Paper
CT IEEE-Antennas-and-Propagation-Society International Symposium
CY JUN 26-JUL 01, 2016
CL Fajardo, PR
SP Inst Elect & Elect Engineers Antennas & Propagat Soc, Inst Elect & Elect Engineers
AB This work presents a numerical method for modeling electromagnetic scattering from two-dimensional cavities embedded in a perfectly conducting ground plane. First, the problem is discretized in time with Newmark's method, then solved using finite-element boundary-integral technique. A proof is presented to demonstrate that the discretized variational formulation is well-posed at each time step.
C1 [Uber, Richard; Wood, Aihua] US Air Force, Inst Technol, Dept Math & Stat, Wright Patterson AFB, OH 45419 USA.
RP Uber, R (reprint author), US Air Force, Inst Technol, Dept Math & Stat, Wright Patterson AFB, OH 45419 USA.
EM richard.uber@afit.edu
NR 4
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1522-3965
BN 978-1-5090-2886-3
J9 IEEE ANTENNAS PROP
PY 2016
BP 2089
EP 2090
PG 2
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BG3XZ
UT WOS:000388377101013
ER
PT S
AU Mattamana, A
Gouty, W
Khalil, W
Watson, P
Patel, VJ
AF Mattamana, A.
Gouty, W.
Khalil, W.
Watson, P.
Patel, V. J.
GP IEEE
TI Multi-octave and Frequency-agile LNAs Covering S-C Band using 0.25 mu m
GaN Technology
SO 2016 IEEE COMPOUND SEMICONDUCTOR INTEGRATED CIRCUIT SYMPOSIUM (CSICS)
SE IEEE Compound Semiconductor Integrated Circuit Symposium Technical
Digest
LA English
DT Proceedings Paper
CT IEEE Compound Semiconductor Integrated Circuit Symposium (IEEE CSICS)
CY OCT 23-26, 2016
CL Austin, TX
SP IEEE Electron Devices Soc, IEEE Solid State Circuits Soc, IEEE Microwave Theory & Tech Soc, IEEE
DE Frequency-agile; Broadband; Low Noise Amplifier; Receiver; GaN;
Telemetry; Multi-band; Multifunctional; Noise Figure; Output Third Order
Intercept; CSWaP
AB This paper reports the design and measured results of a multi-octave low noise amplifier (LNA) and a frequency-agile LNA utilizing a 0.25 mu m gallium nitride (GaN) integrated circuit process technology for multi-band receiver applications. The demonstrated broadband LNA covers an instantaneous bandwidth from S- to C-bands (2.2-7.0 GHz), and the frequency-agile LNA cumulatively spans across 3 distinct bands (2.2-2.4 GHz, 4.4-5.0 GHz, and 5.0-6.7 GHz). The measured noise figure (NF), output third order intercept (OIP3), and peak gain of the wideband LNA is 1.0-1.7 dB, 19.0-26.0 dBm, and 10.6 dB with a gain flatness of +/- 0.35 dB respectively at a nominal power consumption of 480 mW across the band. At the same nominal power consumption, the frequency-agile LNA demonstrated a NF of 1.3, 1.4, and 1.2 dB; OIP3 of 23, 27, and 31 dBm; and gain of 13.6, 10.6, and 10.8 dB at 2.3 GHz, 4.7 GHz, and 5.8 GHz, respectively. The performance of the frequency-agile LNA is comparable to that of optimized narrowband LNAs at S- and C-bands. Compared to the multi-octave LNA, the frequency-agile LNA demonstrated better performance in gain and OIP3 at the frequencies of interest.
C1 [Mattamana, A.; Gouty, W.; Watson, P.; Patel, V. J.] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Khalil, W.] Ohio State Univ, Columbus, OH 43210 USA.
RP Mattamana, A (reprint author), Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
NR 11
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1550-8781
BN 978-1-5090-1608-2
J9 COMP SEMICOND INTEGR
PY 2016
BP 24
EP 28
PG 5
WC Engineering, Electrical & Electronic
SC Engineering
GA BG7LU
UT WOS:000391432400007
ER
PT S
AU Rashid, S
Dupaix, B
Watson, P
Gaber, W
Patel, VJ
Mattamana, A
Dooley, S
LaRue, M
Khalil, W
AF Rashid, Shahriar
Dupaix, Brian
Watson, Paul
Gaber, Wagdy
Patel, Vipul J.
Mattamana, Aji
Dooley, Steven
LaRue, Matthew
Khalil, Waleed
GP IEEE
TI A Wide-Band Complementary Digital Driver for Pulse Modulated
Single-Ended and Differential S/C Bands Class-E PAs in 130 nm GaAs
Technology
SO 2016 IEEE COMPOUND SEMICONDUCTOR INTEGRATED CIRCUIT SYMPOSIUM (CSICS)
SE IEEE Compound Semiconductor Integrated Circuit Symposium Technical
Digest
LA English
DT Proceedings Paper
CT IEEE Compound Semiconductor Integrated Circuit Symposium (IEEE CSICS)
CY OCT 23-26, 2016
CL Austin, TX
SP IEEE Electron Devices Soc, IEEE Solid State Circuits Soc, IEEE Microwave Theory & Tech Soc, IEEE
DE Pre-Amplifier; Wide-Band; Digital Driver; Buffer; Class E; Power
Amplifier; PPM; PWM; GaAs
ID E POWER-AMPLIFIER; CMOS
AB Wide-band digital drivers are indispensable for SMPAs (Switched Mode Power Amplifiers) in PWM (Pulse Width Modulation) and PPM (Pulse Position Modulation) applications. This paper presents the design of a wideband RF pre-amplifying buffer, innovated for very low dropout and low power complementary operation in heterojunction technologies affording only depletion type devices. A simple, passive bias level shifting technique is also incorporated to facilitate interfacing the digital modulator in silicon substrate with the PA in III-V wafer. In order to experimentally validate the concepts, the proposed driver is employed for driving an S-band single-ended class-E PA as well as for its differential version, modified to switch over S and C bands, in 130 nm GaAs pHEMT technology. The output powers of the differential amplifier are combined using on-chip transformer balun. Test results of both chips demonstrate that the implemented drivers consume less than 4% of the overall PA efficiencies, wherein the buffer responds linearly to the wideband input pulses when tested alone.
C1 [Rashid, Shahriar; Dupaix, Brian; Gaber, Wagdy; LaRue, Matthew; Khalil, Waleed] Ohio State Univ, Electrosci Lab, Columbus, OH 43212 USA.
[Watson, Paul; Patel, Vipul J.; Mattamana, Aji; Dooley, Steven] Air Force Res Lab, 2241 Avionics Circle, Wright Patterson AFB, OH 45433 USA.
RP Rashid, S (reprint author), Ohio State Univ, Electrosci Lab, Columbus, OH 43212 USA.
NR 9
TC 0
Z9 0
U1 1
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1550-8781
BN 978-1-5090-1608-2
J9 COMP SEMICOND INTEGR
PY 2016
BP 33
EP 36
PG 4
WC Engineering, Electrical & Electronic
SC Engineering
GA BG7LU
UT WOS:000391432400009
ER
PT S
AU Blevins, JD
Via, GD
AF Blevins, J. D.
Via, G. D.
GP IEEE
TI Prospects for Gallium Nitride-on-Diamond Transistors
SO 2016 IEEE COMPOUND SEMICONDUCTOR INTEGRATED CIRCUIT SYMPOSIUM (CSICS)
SE IEEE Compound Semiconductor Integrated Circuit Symposium Technical
Digest
LA English
DT Proceedings Paper
CT IEEE Compound Semiconductor Integrated Circuit Symposium (IEEE CSICS)
CY OCT 23-26, 2016
CL Austin, TX
SP IEEE Electron Devices Soc, IEEE Solid State Circuits Soc, IEEE Microwave Theory & Tech Soc, IEEE
DE GaN; HEMT; CVD polycrystalline diamond; thermal management
AB Strategies aimed at improving the near junction heat removal of Gallium Nitride (GaN) High Electron Mobility Transistors (HEMTs) are presently limiting GaN device technology from realization of its true capability [1]. Approximately ten years ago, Cree demonstrated AlGaN/GaN HEMTs with power densities exceeding 40 W/mm [2]. Control of the GaN junction temperature requires integration of thermal transport solutions near the heat source to ensure optimal performance and reliable operation [3]. An approach under consideration is the use of Chemical Vapor Deposition (CVD) polycrystalline diamond inserted within microns of the device junction. Recent AFRL and Defense Advanced Research Projects Agency (DARPA) efforts have shown that replacing the epitaxial host substrate with high thermal conductivity polycrystalline diamond substrates can improve the GaN HEMT areal power density >3Xs [4-9]. This paper will examine the motivation behind the use of diamond, integration approaches, material/device results and key technological challenges going forward.
C1 [Blevins, J. D.; Via, G. D.] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Blevins, JD (reprint author), US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
NR 15
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1550-8781
BN 978-1-5090-1608-2
J9 COMP SEMICOND INTEGR
PY 2016
BP 102
EP 105
PG 4
WC Engineering, Electrical & Electronic
SC Engineering
GA BG7LU
UT WOS:000391432400024
ER
PT S
AU Thomas, CM
Quach, T
Telliez, I
Nakatani, T
Kimball, D
Larson, LE
AF Thomas, Chris M.
Quach, Tony
Telliez, Isabelle
Nakatani, Toshifumi
Kimball, Donald
Larson, Lawrence E.
GP IEEE
TI A 250 nm GaN N-path Filter IC with+27 dBm Blocker Tolerance
SO 2016 IEEE COMPOUND SEMICONDUCTOR INTEGRATED CIRCUIT SYMPOSIUM (CSICS)
SE IEEE Compound Semiconductor Integrated Circuit Symposium Technical
Digest
LA English
DT Proceedings Paper
CT IEEE Compound Semiconductor Integrated Circuit Symposium (IEEE CSICS)
CY OCT 23-26, 2016
CL Austin, TX
SP IEEE Electron Devices Soc, IEEE Solid State Circuits Soc, IEEE Microwave Theory & Tech Soc, IEEE
DE Bandpass filter; GaN; N-path filtering; passive mixer; SAW-less
AB A fully integrated 250 nm GaN bandpass N-path filter is presented for high blocker tolerance applications. Measurements from 200 MHz to 1.9 GHz of a 4-phase shunt architecture demonstrate a broadband tunable bandpass response with insertion loss less than 5 dB, out-of-band rejection of 18 dB, in-band blocker B1dB of +18 dBm, and out-of-band blocker BldB of +27 dBm.
C1 [Thomas, Chris M.; Telliez, Isabelle; Nakatani, Toshifumi; Kimball, Donald] MaXentr Technol LLC, Ft Lee, NJ 07024 USA.
[Thomas, Chris M.] Univ Calif San Diego, La Jolla, CA 92093 USA.
[Quach, Tony] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Larson, Lawrence E.] Brown Univ, Providence, RI 02912 USA.
RP Thomas, CM (reprint author), MaXentr Technol LLC, Ft Lee, NJ 07024 USA.; Thomas, CM (reprint author), Univ Calif San Diego, La Jolla, CA 92093 USA.
NR 5
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1550-8781
BN 978-1-5090-1608-2
J9 COMP SEMICOND INTEGR
PY 2016
BP 301
EP 304
PG 4
WC Engineering, Electrical & Electronic
SC Engineering
GA BG7LU
UT WOS:000391432400074
ER
PT S
AU Baker, CC
Friebele, EJ
Askins, CG
Hunt, MP
Marcheschi, BA
Fontana, J
Peele, JR
Kim, W
Sanghera, J
Zhang, J
Pattnaik, RK
Merkle, LD
Dubinskii, M
Chen, YM
Dajani, IA
Mart, C
AF Baker, Colin C.
Friebele, E. Joseph
Askins, Charles G.
Hunt, Michael P.
Marcheschi, Barbara A.
Fontana, Jake
Peele, John R.
Kim, Woohong
Sanghera, Jasbinder
Zhang, Jun
Pattnaik, Radha K.
Merkle, Larry D.
Dubinskii, Mark
chen, Youming
Dajani, Iyad A.
Mart, Cody
BE Ballato, J
TI Nanoparticle Doping for Improved Er-doped Fiber Lasers
SO FIBER LASERS XIII: TECHNOLOGY, SYSTEMS, AND APPLICATIONS
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Fiber Lasers XIII -Technology, Systems, and Applications
CY FEB 15-18, 2016
CL San Francisco, CA
SP SPIE, NKT Photon A S, PolarOnyx Inc
DE Erbium doped fiber; nanoparticles; high energy lasers; fiber lasers
ID BRILLOUIN-SCATTERING SUPPRESSION
AB A nanoparticle (NP) doping technique was used for making erbium-doped fibers (EDFs) for high energy lasers. The nanoparticles were doped into the silica soot of preforms, which were drawn into fibers. The Er luminescence lifetimes of the NP-doped cores are longer than those of corresponding solution-doped silica, and substantially less Al is incorporated into the NP-doped cores. Optical-to-optical slope efficiencies of greater than 71% have been measured. Initial investigations of stimulated Brillouin scattering (SBS) have indicated that SBS suppression is achieved by NP doping, where we observed a low intrinsic Brillouin gain coefficient, of similar to 1x 10(-11) m/W and the Brillouin bandwidth was increased by 2.5x compared to fused silica.
C1 [Baker, Colin C.; Friebele, E. Joseph; Askins, Charles G.; Hunt, Michael P.; Marcheschi, Barbara A.; Fontana, Jake; Kim, Woohong; Sanghera, Jasbinder] US Navy, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
[Peele, John R.] Sotera Def Syst, 430 Natl Business Pkwy, Annapolis, MD 20701 USA.
[Zhang, Jun; Pattnaik, Radha K.; Merkle, Larry D.; Dubinskii, Mark; chen, Youming] US Army, Res Lab, 2800 Powder Mill Rd, Adelphi, MD 20783 USA.
[Dajani, Iyad A.] US Air Force, Res Lab, 3550 Aberdeen Ave SE, Kirtland AFB, NM 87117 USA.
[Mart, Cody] Univ Arizona, Coll Opt Sci, Tucson, AZ 85721 USA.
RP Baker, CC (reprint author), US Navy, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
NR 12
TC 0
Z9 0
U1 0
U2 0
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-1-62841-963-4
J9 PROC SPIE
PY 2016
VL 9728
AR UNSP 97280T
DI 10.1117/12.2217905
PG 9
WC Engineering, Electrical & Electronic; Materials Science,
Multidisciplinary; Optics
SC Engineering; Materials Science; Optics
GA BG7JR
UT WOS:000391388500026
ER
PT S
AU Dajani, I
Flores, A
Holten, R
Anderson, B
Pulford, B
Ehrenreich, T
AF Dajani, Iyad
Flores, Angel
Holten, Roger
Anderson, Brian
Pulford, Benjamin
Ehrenreich, Thomas
BE Ballato, J
TI Multi-kilowatt power scaling and coherent beam combining of
narrow-linewidth fiber lasers
SO FIBER LASERS XIII: TECHNOLOGY, SYSTEMS, AND APPLICATIONS
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Fiber Lasers XIII -Technology, Systems, and Applications
CY FEB 15-18, 2016
CL San Francisco, CA
SP SPIE, NKT Photon A S, PolarOnyx Inc
DE Yb-doped fiber lasers; stimulated Brillouin scattering; modal
instability
ID SINGLE-FREQUENCY; PHASE MODULATION; MODE-INSTABILITY; OPTICAL-FIBERS;
AMPLIFIER; THRESHOLD
AB We report results from two similar to 1.5 kW Yb-doped fiber amplifiers with comparable optical to optical efficiencies and linewidths. One amplifier utilized a fiber with a core diameter of 25 mu m while the core diameter of the fiber utilized in the other amplifier was 20 mu m. Stimulated Brillouin scattering (SBS) suppression in both cases was achieved through pseudo-random bit sequence (PRBS) phase modulation. While the power generated in the larger core fiber was modal instability (MI) limited, no sign of MI was observed in the smaller core fiber. This may allow us to utilize the higher MI threshold fiber to scale further while maintaining sufficiently narrow linewidth for beam combining. Furthermore, in a demonstration of the utility of applying a thermal gradient in conjunction with phase modulation to suppress SBS further, we report on a 1 kW amplifier driven at a PRBS clock rate of 2 GHz. Finally, we compare the coherent beam combining properties of amplifiers seeded with PRBS phase modulated sources to those seeded with white noise sources.
C1 [Dajani, Iyad; Flores, Angel; Holten, Roger; Anderson, Brian; Pulford, Benjamin; Ehrenreich, Thomas] US Air Force, Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA.
RP Dajani, I (reprint author), US Air Force, Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA.
NR 20
TC 1
Z9 1
U1 1
U2 1
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-1-62841-963-4
J9 PROC SPIE
PY 2016
VL 9728
AR UNSP 972801
DI 10.1117/12.2218216
PG 8
WC Engineering, Electrical & Electronic; Materials Science,
Multidisciplinary; Optics
SC Engineering; Materials Science; Optics
GA BG7JR
UT WOS:000391388500002
ER
PT S
AU Flores, A
Ehrenreich, T
Holten, R
Anderson, B
Dajani, I
AF Flores, Angel
Ehrenreich, Thomas
Holten, Roger
Anderson, Brian
Dajani, Iyad
BE Ballato, J
TI Multi-kW Coherent Combining of Fiber Lasers Seeded with Pseudo Random
Phase Modulated Light
SO FIBER LASERS XIII: TECHNOLOGY, SYSTEMS, AND APPLICATIONS
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Fiber Lasers XIII -Technology, Systems, and Applications
CY FEB 15-18, 2016
CL San Francisco, CA
SP SPIE, NKT Photon A S, PolarOnyx Inc
DE Fiber lasers and amplifiers; Laser beam combining; phase modulation
ID AMPLIFIERS; ARRAY
AB We report efficient coherent beam combining of five kilowatt-class fiber amplifiers with a diffractive optical element (DOE). Based on a master oscillator power amplifier (MOPA) configuration, the amplifiers were seeded with pseudo random phase modulated light. Each non-polarization maintaining fiber amplifier was optically path length matched and provides approximately 1.2 kW of near diffraction-limited output power (measured M-2 < 1.1). Consequently, a low power sample of each laser was utilized for active linear polarization control. A low power sample of the combined beam after the DOE provided an error signal for active phase locking which was performed via Locking of Optical Coherence by Single-Detector Electronic-Frequency Tagging (LOCSET). After phase stabilization, the beams were coherently combined via the 1x5 DOE. A total combined output power of 4.9 kW was achieved with 82% combining efficiency and excellent beam quality (M-2 < 1.1). The intrinsic DOE splitter loss was 5%. Similarly, losses due in part to non-ideal polarization, ASE content, uncorrelated wavefront errors, and misalignment errors contributed to the efficiency reduction.
C1 [Flores, Angel; Ehrenreich, Thomas; Holten, Roger; Anderson, Brian; Dajani, Iyad] US Air Force, Res Lab, Directed Energy Directorate, 3550 Aberdeen Ave SE, Kirtland AFB, NM 87117 USA.
RP Flores, A (reprint author), US Air Force, Res Lab, Directed Energy Directorate, 3550 Aberdeen Ave SE, Kirtland AFB, NM 87117 USA.
NR 9
TC 0
Z9 0
U1 0
U2 0
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-1-62841-963-4
J9 PROC SPIE
PY 2016
VL 9728
AR UNSP 97281Y
DI 10.1117/12.2213423
PG 6
WC Engineering, Electrical & Electronic; Materials Science,
Multidisciplinary; Optics
SC Engineering; Materials Science; Optics
GA BG7JR
UT WOS:000391388500053
ER
PT S
AU Naderi, NA
Flores, A
Anderson, BM
Rowland, K
Dajani, I
AF Naderi, Nader A.
Flores, Angel
Anderson, Brian M.
Rowland, Ken, Jr.
Dajani, Iyad
BE Ballato, J
TI Kilowatt high-efficiency narrow-linewidth monolithic fiber amplifier
operating at 1034 nm
SO FIBER LASERS XIII: TECHNOLOGY, SYSTEMS, AND APPLICATIONS
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Fiber Lasers XIII -Technology, Systems, and Applications
CY FEB 15-18, 2016
CL San Francisco, CA
SP SPIE, NKT Photon A S, PolarOnyx Inc
DE fiber lasers; stimulated Brillouin scattering; phase modulation
ID STIMULATED BRILLOUIN-SCATTERING; OPTICAL-FIBERS; POWER
AB Power scaling investigation of a narrow-linewidth, Ytterbium-doped all-fiber amplifier operating at 1034 nm is presented. Nonlinear stimulated Brillouin scattering (SBS) effects were suppressed through the utilization of an external phase modulation technique. Here, the power amplifier was seeded with a spectrally broadened master oscillator and the results were compared using both pseudo-random bit sequence (PRBS) and white noise source (WNS) phase modulation formats. By utilizing an optical band pass filter as well as optimizing the length of fiber used in the pre-amplifier stages, we were able to appreciably suppress unwanted amplified spontaneous emission (ASE). Notably, through PRBS phase modulation, greater than two-fold enhancement in threshold power was achieved when compared to the WNS modulated case. Consequently, by further optimizing both the power amplifier length and PRBS pattern at a clock rate of 3.5 GHz, we demonstrated 1 kilowatt of power with a slope efficiency of 81% and an overall ASE content of less than 1%. Beam quality measurements at 1 kilowatt provided near diffraction-limited operation (M-2 < 1.2) with no sign of modal instability. To the best of our knowledge, the power scaling results achieved in this work represent the highest power reported for a spectrally narrow all-fiber amplifier operating at < 1040 nm in Yb-doped silica-based fiber.
C1 [Naderi, Nader A.; Flores, Angel; Anderson, Brian M.; Rowland, Ken, Jr.; Dajani, Iyad] US Air Force, Res Lab, 3550 Aberdeen Ave SE, Kirtland AFB, NM 87117 USA.
RP Naderi, NA (reprint author), US Air Force, Res Lab, 3550 Aberdeen Ave SE, Kirtland AFB, NM 87117 USA.
NR 10
TC 0
Z9 0
U1 0
U2 0
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-1-62841-963-4
J9 PROC SPIE
PY 2016
VL 9728
AR UNSP 972803
DI 10.1117/12.2211803
PG 6
WC Engineering, Electrical & Electronic; Materials Science,
Multidisciplinary; Optics
SC Engineering; Materials Science; Optics
GA BG7JR
UT WOS:000391388500004
ER
PT S
AU Naderi, NA
Flores, A
Anderson, BM
Dajani, I
AF Naderi, Nader A.
Flores, Angel
Anderson, Brian M.
Dajani, Iyad
BE Ballato, J
TI Kilowatt-Level Narrow-Linewidth Monolithic Fiber Amplifier Based on
Laser Gain Competition
SO FIBER LASERS XIII: TECHNOLOGY, SYSTEMS, AND APPLICATIONS
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Fiber Lasers XIII -Technology, Systems, and Applications
CY FEB 15-18, 2016
CL San Francisco, CA
SP SPIE, NKT Photon A S, PolarOnyx Inc
DE fiber lasers; stimulated Brillouin scattering; phase modulation
ID STIMULATED BRILLOUIN-SCATTERING; HIGH-POWER; PHASE; KW
AB Laser gain competition was used in conjunction with external phase modulation techniques in order to investigate power scaling of narrow-linewidth monolithic Ytterbium-doped fiber amplifiers. In this study, both pseudo-random bit sequence (PRBS) and filtered white noise source (WNS) modulation techniques were separately utilized to drive the external phase modulator for linewidth broadening. The final-stage amplifier was then seeded with the phase modulated narrow-linewidth 1064 nm signal along with a spectrally broader 1038 nm source. Consequently, integration of laser gain competition in conjunction with PRBS phase modulation yields a factor of similar to 15 dB in stimulated Brillouin scattering (SBS) threshold enhancement at a clock rate of 2.5 GHz; leading to 1 kilowatt of output power with 85% optical efficiency at 1064 nm. Notably, the combination of PRBS phase modulation with laser gain competition provided superior enhancement in SBS threshold power when compared to the WNS modulated case. The beam quality at maximum power was near the diffraction limit (M-2 < 1.2) with no sign of modal instability. Overall, the power scaling results represent a significant reduction in spectral linewidth compared to that of commercially available narrow-linewidth Ytterbium-doped fiber amplifiers.
C1 [Naderi, Nader A.; Flores, Angel; Anderson, Brian M.; Dajani, Iyad] US Air Force, Res Lab, 3550 Aberdeen Ave SE, Kirtland AFB, NM 87117 USA.
RP Naderi, NA (reprint author), US Air Force, Res Lab, 3550 Aberdeen Ave SE, Kirtland AFB, NM 87117 USA.
NR 7
TC 0
Z9 0
U1 0
U2 0
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-1-62841-963-4
J9 PROC SPIE
PY 2016
VL 9728
AR UNSP 972824
DI 10.1117/12.2211815
PG 6
WC Engineering, Electrical & Electronic; Materials Science,
Multidisciplinary; Optics
SC Engineering; Materials Science; Optics
GA BG7JR
UT WOS:000391388500005
ER
PT S
AU Ward, BG
AF Ward, Benjamin G.
BE Ballato, J
TI Accurate modeling of rod-type photonic crystal fiber amplifiers
SO FIBER LASERS XIII: TECHNOLOGY, SYSTEMS, AND APPLICATIONS
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Fiber Lasers XIII -Technology, Systems, and Applications
CY FEB 15-18, 2016
CL San Francisco, CA
SP SPIE, NKT Photon A S, PolarOnyx Inc
DE Fiber Lasers; Fiber Amplifiers; Photonic Crystal Fibers; Thermal
Effects; Power Scaling; Modeling
ID INSTABILITY THRESHOLD; POWER; IMPACT
AB This paper describes a numerical method of accurately modeling large pitch rod type photonic crystal fiber amplifiers taking into account a converged solution to the thermo-optic feedback loop. This method also accounts for the possibility of asymmetric doping profiles and directly treats higher order mode stimulated thermal Rayleigh scattering gain competition along the entire length of the amplifier. Example applications are described. This approach enables further fiber design optimization to increase peak and average amplifier power outputs.
C1 [Ward, Benjamin G.] US Air Force Acad, Dept Phys, 2354 Fairchild Dr,Suite 2A31, Colorado Springs, CO 80840 USA.
RP Ward, BG (reprint author), US Air Force Acad, Dept Phys, 2354 Fairchild Dr,Suite 2A31, Colorado Springs, CO 80840 USA.
NR 8
TC 0
Z9 0
U1 0
U2 0
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-1-62841-963-4
J9 PROC SPIE
PY 2016
VL 9728
AR UNSP 97280F
DI 10.1117/12.2214477
PG 10
WC Engineering, Electrical & Electronic; Materials Science,
Multidisciplinary; Optics
SC Engineering; Materials Science; Optics
GA BG7JR
UT WOS:000391388500014
ER
PT S
AU Haugan, HJ
Olson, BV
Brown, GJ
Kadlec, EA
Kim, JK
Shaner, EA
AF Haugan, H. J.
Olson, B. V.
Brown, G. J.
Kadlec, E. A.
Kim, J. K.
Shaner, E. A.
BE LeVan, PD
Sood, AK
Wijewarnasuriya, P
DSouza, AI
TI Study of minority carrier lifetimes in very long-wave infrared
strained-layer InAs/GaInSb superlattices
SO INFRARED SENSORS, DEVICES, AND APPLICATIONS VI
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Infrared Sensors, Devices, and Applications VI
CY AUG 31-SEP 01, 2016
CL San Diego, CA
SP SPIE
ID DETECTORS; GROWTH; GASB
AB Significantly improved carrier lifetimes in very long wavelength infrared (VLWIR) InAs/GaInSb superlattice (SL) absorbers are demonstrated by using time-resolved microwave reflectance (TMR) measurements. A nominal 47.0 angstrom InAs/21.5 angstrom Ga0.75In0.25Sb SL structure that produces an approximately 25 mu m response at 10 K has a minority carrier lifetime of 140 +/- 20 ns at 18 K, which is an order-of-magnitude improvement compare to previously reported lifetime values for other VLWIR detector absorbers. This improvement is attributed to the strain-engineered ternary SL design, which offers a variety of epitaxial advantages and ultimately leads to the improvements in the minority carrier lifetime by mitigating defect-mediated Shockley-Read-Hall (SRH) recombination centers. By analyzing the temperaturedependence of TMR decay data, the recombination mechanisms and trap states that currently limit the performance of this SL absorber are identified. The results show a general decrease in the long-decay lifetime component, which is dominated by SRH recombination at temperatures below similar to 30 K, and by Auger recombination at temperatures above similar to 45 K. This result implies that minimal improvement can be made in the minority carrier lifetime at temperatures greater than 45 K without further suppressing Auger recombination through proper band engineering, which suggests that the improvement to be gained by mitigation of the SRH defects would not be substantial at these temperatures. At temperatures lower than 30 K, some improvement can be attained by mitigated of the SRH recombination centers. Since the strain-balanced ternary SL design offers a reasonably good absorption coefficient and many epitaxial advantages during growth, this VLWIR SL material system should be considered a competitive candidate for VLWIR photodetector technology.
C1 [Haugan, H. J.; Brown, G. J.] US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Olson, B. V.; Kadlec, E. A.; Kim, J. K.; Shaner, E. A.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Haugan, HJ (reprint author), US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
NR 28
TC 0
Z9 0
U1 1
U2 1
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-1-5106-0339-4; 978-1-5106-0340-0
J9 PROC SPIE
PY 2016
VL 9974
AR UNSP 997403
DI 10.1117/12.2236535
PG 10
WC Optics; Imaging Science & Photographic Technology
SC Optics; Imaging Science & Photographic Technology
GA BG6UH
UT WOS:000390844000001
ER
PT S
AU LeVan, PD
Sakoglu, U
AF LeVan, Paul D.
Sakoglu, Uenal
BE LeVan, PD
Sood, AK
Wijewarnasuriya, P
DSouza, AI
TI LWIR pupil imaging and longer-term calibration stability
SO INFRARED SENSORS, DEVICES, AND APPLICATIONS VI
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Infrared Sensors, Devices, and Applications VI
CY AUG 31-SEP 01, 2016
CL San Diego, CA
SP SPIE
DE infrared; LWIR; read-out integrated circuit; background suppression;
non-uniformity correction
AB A previous paper described LWIR pupil imaging, and an improved understanding of the behavior of this type of sensor for which the high-sensitivity focal plane array (FPA) operated at higher flux levels includes a reversal in signal integration polarity. We have since considered a candidate methodology for efficient, long-term calibration stability that exploits the following two properties of pupil imaging: (1) a fixed pupil position on the FPA, and (2) signal levels from the scene imposed on significant but fixed LWIR background levels. These two properties serve to keep each pixel operating over a limited dynamic range that corresponds to its location in the pupil and to the signal levels generated at this location by the lower and upper calibration flux levels. Exploiting this property for which each pixel of the Pupil Imager operates over its limited dynamic range, the signal polarity reversal between low and high flux pixels, which occurs for a circular region of pixels near the upper edges of the pupil illumination profile, can be rectified to unipolar integration with a two-level non-uniformity correction (NUC). Images corrected real-time with standard non-uniformity correction (NUC) techniques, are still subject to longer-term drifts in pixel offsets between recalibrations. Long-term calibration stability might then be achieved using either a scene-based non-uniformity correction approach, or with periodic repointing for off-source background estimation and subtraction. Either approach requires dithering of the field of view, by sub-pixel amounts for the first method, or by large off-source motions outside the 0.38 milliradian FOV for the latter method. We report on the results of investigations along both these lines.
C1 [LeVan, Paul D.] US Air Force, Res Lab, Space Vehicles Directorate, 3550 Aberdeen Ave, Kirtland AFB, NM 87117 USA.
[Sakoglu, Uenal] Texas A&M Univ Commerce, Comp Sci Dept, 2600 South Neal St, Commerce, TX 75428 USA.
RP LeVan, PD (reprint author), US Air Force, Res Lab, Space Vehicles Directorate, 3550 Aberdeen Ave, Kirtland AFB, NM 87117 USA.
NR 7
TC 0
Z9 0
U1 0
U2 0
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-1-5106-0339-4; 978-1-5106-0340-0
J9 PROC SPIE
PY 2016
VL 9974
AR UNSP 99740S
DI 10.1117/12.2237899
PG 10
WC Optics; Imaging Science & Photographic Technology
SC Optics; Imaging Science & Photographic Technology
GA BG6UH
UT WOS:000390844000020
ER
PT S
AU Ramirez, DA
Myers, SA
Kuznetsova, Y
Mathews, S
Schuler-Sandy, T
Steenbergen, EH
Morath, CP
Cowan, VM
Krishna, S
AF Ramirez, David A.
Myers, Stephen A.
Kuznetsova, Yuliya
Mathews, Sen
Schuler-Sandy, Theodore
Steenbergen, Elizabeth H.
Morath, Christian P.
Cowan, Vicent M.
Krishna, Sanjay
BE LeVan, PD
Sood, AK
Wijewarnasuriya, P
DSouza, AI
TI Comparison of MWIR unipolar barrier structures based on strained layer
superlattices
SO INFRARED SENSORS, DEVICES, AND APPLICATIONS VI
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Infrared Sensors, Devices, and Applications VI
CY AUG 31-SEP 01, 2016
CL San Diego, CA
SP SPIE
C1 [Ramirez, David A.; Myers, Stephen A.; Kuznetsova, Yuliya] SKINfrared LLC, Albuquerque, NM 87106 USA.
[Mathews, Sen; Schuler-Sandy, Theodore; Krishna, Sanjay] Univ New Mexico, Albuquerque, NM 87131 USA.
[Steenbergen, Elizabeth H.; Morath, Christian P.; Cowan, Vicent M.] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Ramirez, DA (reprint author), SKINfrared LLC, Albuquerque, NM 87106 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-1-5106-0339-4; 978-1-5106-0340-0
J9 PROC SPIE
PY 2016
VL 9974
AR UNSP 99740C
DI 10.1117/12.2239723
PG 1
WC Optics; Imaging Science & Photographic Technology
SC Optics; Imaging Science & Photographic Technology
GA BG6UH
UT WOS:000390844000007
ER
PT S
AU Wheeler, P
Cobb, R
Hartsfield, C
Prince, B
AF Wheeler, Pamela
Cobb, Richard
Hartsfield, Carl
Prince, Benjamin
BE LeVan, PD
Sood, AK
Wijewarnasuriya, P
DSouza, AI
TI Satellite Propulsion Spectral Signature Detection and Analysis through
Hall Effect Thruster Plume and Atmospheric Modeling
SO INFRARED SENSORS, DEVICES, AND APPLICATIONS VI
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Infrared Sensors, Devices, and Applications VI
CY AUG 31-SEP 01, 2016
CL San Diego, CA
SP SPIE
DE near infrared; Hall effect thruster; atmospheric effects; emission
spectra; ground-based observations
ID LASER-INDUCED FLUORESCENCE; XENON
AB Space Situational Awareness (SSA) is of utmost importance in today's congested and contested space environment. Satellites must perform orbital corrections for station keeping, devices like high efficiency electric propulsion systems such as a Hall effect thrusters (HETs) to accomplish this are on the rise. The health of this system is extremely important to ensure the satellite can maintain proper position and perform its intended mission. Electron temperature is a commonly used diagnostic to determine the efficiency of a hall thruster. Recent papers have coordinated near infrared (NIR) spectral measurements of emission lines in xenon and krypton to electron temperature measurements. Ground-based observations of these spectral lines could allow the health of the thruster to be determined while the satellite is in operation. Another issue worth considering is the availability of SSA assets for ground-based observations. The current SSA architecture is limited and task saturated. If smaller telescopes, like those at universities, could successfully detect these signatures they could augment data collection for the SSA network. To facilitate this, precise atmospheric modeling must be used to pull out the signature. Within the atmosphere, the NIR has a higher transmission ratio and typical HET propellants are approximately 3x the intensity in the NIR versus the visible spectrum making it ideal for ground based observations. The proposed research will focus on developing a model to determine xenon and krypton signatures through the atmosphere and estimate the efficacy through ground-based observations. The model will take power modes, orbit geometries, and satellite altitudes into consideration and be correlated with lab and field observations.
C1 [Wheeler, Pamela; Cobb, Richard; Hartsfield, Carl] US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
[Prince, Benjamin] US Air Force, Res Lab, Kirtland AFB, NM USA.
RP Wheeler, P (reprint author), US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
EM pamela.wheeler@afit.edu
NR 23
TC 0
Z9 0
U1 0
U2 0
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-1-5106-0339-4; 978-1-5106-0340-0
J9 PROC SPIE
PY 2016
VL 9974
AR UNSP 99740T
DI 10.1117/12.2238021
PG 13
WC Optics; Imaging Science & Photographic Technology
SC Optics; Imaging Science & Photographic Technology
GA BG6UH
UT WOS:000390844000021
ER
PT J
AU Heitzenrater, C
Simpson, A
AF Heitzenrater, Chad
Simpson, Andrew
GP IEEE
TI Misuse, Abuse, and Reuse: Economic utility functions for characterising
security requirements
SO PROCEEDINGS OF 2016 11TH INTERNATIONAL CONFERENCE ON AVAILABILITY,
RELIABILITY AND SECURITY, (ARES 2016)
LA English
DT Proceedings Paper
CT 11th International Conference on Availability, Reliability and Security
(ARES)
CY AUG 31-SEP 02, 2016
CL Salzburg, AUSTRIA
SP SBA Res, Fachhochcshule Salzburg Univ Appl Sci, Vienna Ulniv Technol, Soc ICT Knowledge Transfer
ID INFORMATION SECURITY; SOFTWARE-DEVELOPMENT
AB Negative use cases - in the form of 'misuse' or 'abuse' cases - have found a broad following within the security community due to their ability to make explicit the knowledge, assumptions and desires of stakeholders regarding real and perceived threats to systems. As an accepted threat modelling tool, they have become a standard part of many Secure Software Engineering (SSE) processes. Despite this widespread adoption, aspects of the original misuse case concept have yet to receive a formal treatment in the literature. This paper considers the application of economic utility functions within the negative use case development process, as a means of addressing existing challenges. We provide a simple demonstration of how existing practice might integrate economic factors to describe the business, management and functional concerns that surround system security and software development.
C1 [Heitzenrater, Chad] US Air Force, Res Lab, Informat Directorate, 525 Brooks Rd, Rome, NY 13441 USA.
[Heitzenrater, Chad; Simpson, Andrew] Univ Oxford, Dept Comp Sci, Wolfson Bldg,Pk Rd, Oxford OX1 3QD, England.
RP Heitzenrater, C (reprint author), US Air Force, Res Lab, Informat Directorate, 525 Brooks Rd, Rome, NY 13441 USA.; Heitzenrater, C (reprint author), Univ Oxford, Dept Comp Sci, Wolfson Bldg,Pk Rd, Oxford OX1 3QD, England.
EM chad.heitzenrater@cs.ox.ac.uk; andrew.simpson@cs.ox.ac.uk
NR 39
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-5090-0990-9
PY 2016
BP 572
EP 581
DI 10.1109/ARES.2016.90
PG 10
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BG7CL
UT WOS:000391214400072
ER
PT S
AU Hughes, DH
Erdmann, RK
Nikulin, VV
AF Hughes, David H.
Erdmann, Reinhard K.
Nikulin, Vladimir V.
BE Gruneisen, MT
Dusek, M
Rarity, JG
TI Quantum Operations on Entangled Photons Using Lyot Filters
SO QUANTUM INFORMATION SCIENCE AND TECHNOLOGY II
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Quantum Information Science and Technology II
CY SEP 26-27, 2016
CL Edinburgh, SCOTLAND
SP SPIE
DE quantum operations; entangled photons; Lyot filter
AB Lyot filters have been designed for multi-access high capacity wavelength division multiplexing between a communications hub and spatially separated spokes. Reported here are modifications to a basic classical communications Lyot filter stage [1], but using a hyper-entangled bipartite input state possessing non-degenerate frequencies for advanced quantum communications. Lyot filters and pre-shared linking knowledge can be used to better ensure efficiency and efficacy in manifesting entanglement correlations between polarization degrees of freedom in non-rotationally invariant measurement bases. Lyot filters also allow entangled photon routing, a function of entanglement between incident frequencies and polarization.
C1 [Hughes, David H.] US Air Force, Res Lab, Informat Directorate, 525 Brooks Rd, Rome, NY 13441 USA.
[Erdmann, Reinhard K.] Adv Automat Corp, 201 Mill Rd, Rome, NY 13440 USA.
[Nikulin, Vladimir V.] SUNY Binghamton, Dept Elect & Comp Engn, Binghamton, NY 13902 USA.
RP Hughes, DH (reprint author), US Air Force, Res Lab, Informat Directorate, 525 Brooks Rd, Rome, NY 13441 USA.
NR 16
TC 0
Z9 0
U1 0
U2 0
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-1-5106-0396-7; 978-1-5106-0397-4
J9 PROC SPIE
PY 2016
VL 9996
AR UNSP 99960H
DI 10.1117/12.2241335
PG 13
WC Engineering, Electrical & Electronic; Optics
SC Engineering; Optics
GA BG7IY
UT WOS:000391354000008
ER
PT S
AU Szep, A
Kim, R
Shin, E
Fanto, ML
Osman, J
Alsing, PM
AF Szep, Attila
Kim, Richard
Shin, Eunsung
Fanto, Michael L.
Osman, Joseph
Alsing, Paul M.
BE Gruneisen, MT
Dusek, M
Rarity, JG
TI Polarization entangled cluster state generation in a lithium niobate
chip
SO QUANTUM INFORMATION SCIENCE AND TECHNOLOGY II
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Quantum Information Science and Technology II
CY SEP 26-27, 2016
CL Edinburgh, SCOTLAND
SP SPIE
AB We present a design of a quantum information processing C-phase (Controlled-phase) gate applicable for generating cluster states that has a form of integrated photonic circuits assembled with cascaded directional couplers on a Ti in-diffused Lithium Niobate (Ti-LN) platform where directional couplers as the integrated optical analogue of bulk beam splitters are used as fundamental building blocks. Based on experimentally optimized fabrication parameters of Ti-LN optical waveguides operating at an 810nm wavelength, an integrated Ti-LN quantum C-phase gate is designed and simulated. Our proposed C-phase gate consists of three tunable directional couplers cascaded together with having different weighted switching ratios for providing a tool of routing vertically-and horizontally-polarized photons independently. Its operation mechanism relies on selectively controlling the optical coupling of orthogonally polarized modes via the change in the index of refraction, and its operation is confirmed by the BPM simulation.
C1 [Szep, Attila; Kim, Richard; Shin, Eunsung] US Air Force, Res Lab, 2241 Avionics Circle, Dayton, OH 45433 USA.
[Fanto, Michael L.; Osman, Joseph; Alsing, Paul M.] US Air Force, Res Lab, 26 Elect Pkwy, Rome, NY 13441 USA.
RP Kim, R (reprint author), US Air Force, Res Lab, 2241 Avionics Circle, Dayton, OH 45433 USA.
EM Richard.kim.ctr@wpafb.af.mil
NR 10
TC 0
Z9 0
U1 0
U2 0
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-1-5106-0396-7; 978-1-5106-0397-4
J9 PROC SPIE
PY 2016
VL 9996
AR UNSP 99960G
DI 10.1117/12.2240270
PG 4
WC Engineering, Electrical & Electronic; Optics
SC Engineering; Optics
GA BG7IY
UT WOS:000391354000007
ER
PT J
AU Adams, SF
Miles, JA
Demidov, VI
Tolson, BA
Hensley, AL
AF Adams, Steven F.
Miles, Jared A.
Demidov, Vladimir I.
Tolson, Boyd A.
Hensley, Amber L.
GP IEEE
TI PLASMA ELECTRON SPECTROSCOPY IN MICROHOLLOW DISCHARGE WITH INTEGRATED
WALL PROBE
SO 2016 43RD IEEE INTERNATIONAL CONFERENCE ON PLASMA SCIENCE (ICOPS)
LA English
DT Meeting Abstract
CT 43rd IEEE International Conference on Plasma Science (ICOPS)
CY JUN 19-23, 2016
CL Banff, CANADA
SP IEEE Nucl & Plasma Sci Soc, Plasma Sci & Applicat Comm, IEEE
C1 [Adams, Steven F.; Miles, Jared A.; Demidov, Vladimir I.] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
[Tolson, Boyd A.; Hensley, Amber L.] UES Inc, Dayton, OH 45432 USA.
RI Demidov, Vladimir/A-4247-2013
OI Demidov, Vladimir/0000-0002-2672-7684
NR 0
TC 0
Z9 0
U1 1
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-9601-1
PY 2016
PG 1
WC Engineering, Multidisciplinary; Physics, Fluids & Plasmas
SC Engineering; Physics
GA BG6ZR
UT WOS:000391073600306
ER
PT J
AU Camacho, JF
Brown, DJ
Ruden, EL
Domonkos, MT
AF Camacho, J. F.
Brown, D. J.
Ruden, E. L.
Domonkos, M. T.
GP IEEE
TI EXPERIMENTAL CHARACTERIZATION OF A LASER-TRIGGERED SPARK-GAP SWITCH
SO 2016 43RD IEEE INTERNATIONAL CONFERENCE ON PLASMA SCIENCE (ICOPS)
LA English
DT Meeting Abstract
CT 43rd IEEE International Conference on Plasma Science (ICOPS)
CY JUN 19-23, 2016
CL Banff, CANADA
SP IEEE Nucl & Plasma Sci Soc, Plasma Sci & Applicat Comm, IEEE
C1 [Camacho, J. F.; Brown, D. J.] Leidos Inc, Albuquerque, NM 87106 USA.
[Ruden, E. L.; Domonkos, M. T.] Air Force Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-9601-1
PY 2016
PG 1
WC Engineering, Multidisciplinary; Physics, Fluids & Plasmas
SC Engineering; Physics
GA BG6ZR
UT WOS:000391073600101
ER
PT J
AU Degnan, JH
Grabowski, C
Domonkos, M
Ruden, EL
Amdahl, DJ
Frese, MH
Frese, SD
Wurden, GA
Weber, TE
AF Degnan, J. H.
Grabowski, C.
Domonkos, M.
Ruden, E. L.
Amdahl, D. J.
Frese, M. H.
Frese, S. D.
Wurden, G. A.
Weber, T. E.
GP IEEE
TI RESULTS FROM COMPRESSION OF FIELD REVERSED CONFIGURATION USING IMPLODING
SOLID LINER
SO 2016 43RD IEEE INTERNATIONAL CONFERENCE ON PLASMA SCIENCE (ICOPS)
LA English
DT Meeting Abstract
CT 43rd IEEE International Conference on Plasma Science (ICOPS)
CY JUN 19-23, 2016
CL Banff, CANADA
SP IEEE Nucl & Plasma Sci Soc, Plasma Sci & Applicat Comm, IEEE
C1 [Degnan, J. H.; Grabowski, C.; Domonkos, M.; Ruden, E. L.; Amdahl, D. J.] Air Force Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA.
[Frese, M. H.; Frese, S. D.] NumerEx LLC, Albuquerque, NM USA.
[Wurden, G. A.; Weber, T. E.] Los Alamos Natl Lab, Los Alamos, NM USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-9601-1
PY 2016
PG 1
WC Engineering, Multidisciplinary; Physics, Fluids & Plasmas
SC Engineering; Physics
GA BG6ZR
UT WOS:000391073600386
ER
PT J
AU Domonkos, MT
Degnan, JH
Baker, W
Grabowski, TC
Turchi, PJ
AF Domonkos, Matthew T.
Degnan, James H.
Baker, William
Grabowski, T. Chris
Turchi, Peter J.
GP IEEE
TI SHIVA STAR: PIONEERING MEGAGAUSS SCIENCE AND TECHNOLOGY
SO 2016 43RD IEEE INTERNATIONAL CONFERENCE ON PLASMA SCIENCE (ICOPS)
LA English
DT Meeting Abstract
CT 43rd IEEE International Conference on Plasma Science (ICOPS)
CY JUN 19-23, 2016
CL Banff, CANADA
SP IEEE Nucl & Plasma Sci Soc, Plasma Sci & Applicat Comm, IEEE
C1 [Domonkos, Matthew T.; Degnan, James H.; Baker, William; Grabowski, T. Chris] Air Force Res Lab, Kirtland AFB, NM 87117 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-9601-1
PY 2016
PG 1
WC Engineering, Multidisciplinary; Physics, Fluids & Plasmas
SC Engineering; Physics
GA BG6ZR
UT WOS:000391073600388
ER
PT J
AU Elle, J
Iglesias, E
Wahlstrand, J
Zahedpour, S
Milchberg, H
AF Elle, Jennifer
Iglesias, Enrique
Wahlstrand, Jared
Zahedpour, Sina
Milchberg, Howard
GP IEEE
TI Identification of anomalous ionization in an ultrashort pulse
laser-generated xenon plasma
SO 2016 43RD IEEE INTERNATIONAL CONFERENCE ON PLASMA SCIENCE (ICOPS)
LA English
DT Meeting Abstract
CT 43rd IEEE International Conference on Plasma Science (ICOPS)
CY JUN 19-23, 2016
CL Banff, CANADA
SP IEEE Nucl & Plasma Sci Soc, Plasma Sci & Applicat Comm, IEEE
C1 [Elle, Jennifer] US Air Force, Res Lab, Kirtland AFB, NM 87117 USA.
[Iglesias, Enrique] Univ Simon Bolivar, Dept Fis, Caracas, Venezuela.
[Wahlstrand, Jared; Zahedpour, Sina; Milchberg, Howard] Univ Maryland, Inst Res Elect & Appl Phys, College Pk, MD 20742 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-9601-1
PY 2016
PG 1
WC Engineering, Multidisciplinary; Physics, Fluids & Plasmas
SC Engineering; Physics
GA BG6ZR
UT WOS:000391073600214
ER
PT J
AU Englesbe, A
Elle, J
Lucero, A
Poole, K
Domonkos, M
Schmitt-Sody, A
Krushelnick, K
AF Englesbe, Alexander
Elle, Jennifer
Lucero, Adrian
Poole, Kaitlin
Domonkos, Matt
Schmitt-Sody, Andreas
Krushelnick, Karl
GP IEEE
TI RADIOFREQUENCY ELECTROMAGNETIC PULSES GENERATED BY ULTRAFAST LASER
FILAMENTS
SO 2016 43RD IEEE INTERNATIONAL CONFERENCE ON PLASMA SCIENCE (ICOPS)
LA English
DT Meeting Abstract
CT 43rd IEEE International Conference on Plasma Science (ICOPS)
CY JUN 19-23, 2016
CL Banff, CANADA
SP IEEE Nucl & Plasma Sci Soc, Plasma Sci & Applicat Comm, IEEE
C1 [Englesbe, Alexander; Elle, Jennifer; Lucero, Adrian; Poole, Kaitlin; Domonkos, Matt; Schmitt-Sody, Andreas] Air Force Res Lab, Kirtland AFB, NM 87117 USA.
[Krushelnick, Karl] Univ Michigan, Ctr Ultrafast Opt Sci, Ann Arbor, MI 48109 USA.
NR 3
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-9601-1
PY 2016
PG 1
WC Engineering, Multidisciplinary; Physics, Fluids & Plasmas
SC Engineering; Physics
GA BG6ZR
UT WOS:000391073600372
ER
PT J
AU Fairchild, SB
Lange, MA
Back, TC
Murray, PT
Lockwood, NP
Marincel, D
AF Fairchild, Steven B.
Lange, Mathew A.
Back, Tyson C.
Murray, Paul T.
Lockwood, Nathan P.
Marincel, Daniel
GP IEEE
TI Carbon Nanotube Fiber Array Field Emission Cathodes
SO 2016 43RD IEEE INTERNATIONAL CONFERENCE ON PLASMA SCIENCE (ICOPS)
LA English
DT Meeting Abstract
CT 43rd IEEE International Conference on Plasma Science (ICOPS)
CY JUN 19-23, 2016
CL Banff, CANADA
SP IEEE Nucl & Plasma Sci Soc, Plasma Sci & Applicat Comm, IEEE
C1 [Fairchild, Steven B.; Lange, Mathew A.; Back, Tyson C.; Murray, Paul T.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Lockwood, Nathan P.] Air Force Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA.
[Marincel, Daniel] Rice Univ, Dept Chem & Biomol Engn, Houston, TX 77005 USA.
[Marincel, Daniel] Rice Univ, Dept Chem, Houston, TX 77005 USA.
NR 2
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-9601-1
PY 2016
PG 1
WC Engineering, Multidisciplinary; Physics, Fluids & Plasmas
SC Engineering; Physics
GA BG6ZR
UT WOS:000391073600122
ER
PT J
AU Grabowski, C
Degnan, JH
Domonkos, M
Amdahl, D
Ruden, EL
Wurden, GA
Weber, TE
AF Grabowski, C.
Degnan, J. H.
Domonkos, M.
Amdahl, D.
Ruden, E. L.
Wurden, G. A.
Weber, T. E.
GP IEEE
TI THE FIELD-REVERSED CONFIGURATION HEATING EXPERIMENT ON SHIVA STAR
SO 2016 43RD IEEE INTERNATIONAL CONFERENCE ON PLASMA SCIENCE (ICOPS)
LA English
DT Meeting Abstract
CT 43rd IEEE International Conference on Plasma Science (ICOPS)
CY JUN 19-23, 2016
CL Banff, CANADA
SP IEEE Nucl & Plasma Sci Soc, Plasma Sci & Applicat Comm, IEEE
C1 [Grabowski, C.; Degnan, J. H.; Domonkos, M.; Amdahl, D.; Ruden, E. L.] Air Force Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA.
[Wurden, G. A.; Weber, T. E.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-9601-1
PY 2016
PG 1
WC Engineering, Multidisciplinary; Physics, Fluids & Plasmas
SC Engineering; Physics
GA BG6ZR
UT WOS:000391073600387
ER
PT J
AU Hamilton, A
Caplinger, J
Sotnikov, V
AF Hamilton, A.
Caplinger, J.
Sotnikov, V.
GP IEEE
TI Experiments and Diagnostics for Investigation of Shock Formation in
Colliding Hypersonic Magnetized Plasma Flows
SO 2016 43RD IEEE INTERNATIONAL CONFERENCE ON PLASMA SCIENCE (ICOPS)
LA English
DT Meeting Abstract
CT 43rd IEEE International Conference on Plasma Science (ICOPS)
CY JUN 19-23, 2016
CL Banff, CANADA
SP IEEE Nucl & Plasma Sci Soc, Plasma Sci & Applicat Comm, IEEE
C1 [Hamilton, A.; Caplinger, J.; Sotnikov, V.] US Air Force, Antenna & Electromagnet Technol Branch, Sensors Directorate, Res Lab, Wright Patterson AFB, OH 45433 USA.
NR 2
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-9601-1
PY 2016
PG 1
WC Engineering, Multidisciplinary; Physics, Fluids & Plasmas
SC Engineering; Physics
GA BG6ZR
UT WOS:000391073600212
ER
PT J
AU Jordan, NM
Greening, GB
Exelby, SC
Gilgenbach, RM
Hoff, BW
Maestas, SS
AF Jordan, Nicholas M.
Greening, Geoffrey B.
Exelby, Steven C.
Gilgenbach, Ronald M.
Hoff, Brad W.
Maestas, Sabrina S.
GP IEEE
TI ADDITIVELY MANUFACTURED STRUCTURES FOR HIGH POWER MICROWAVE DEVICES
SO 2016 43RD IEEE INTERNATIONAL CONFERENCE ON PLASMA SCIENCE (ICOPS)
LA English
DT Meeting Abstract
CT 43rd IEEE International Conference on Plasma Science (ICOPS)
CY JUN 19-23, 2016
CL Banff, CANADA
SP IEEE Nucl & Plasma Sci Soc, Plasma Sci & Applicat Comm, IEEE
C1 [Jordan, Nicholas M.; Greening, Geoffrey B.; Exelby, Steven C.; Gilgenbach, Ronald M.] Univ Michigan, Nucl Engn & Radiol Sci Dept, Plasma Phys Pulsed Power & Microwave Lab, Ann Arbor, MI 48109 USA.
[Hoff, Brad W.; Maestas, Sabrina S.] Air Force Res Lab, Directed Energy Directorate, High Power Electromagnet Div, Albuquerque, NM 87117 USA.
NR 2
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-9601-1
PY 2016
PG 1
WC Engineering, Multidisciplinary; Physics, Fluids & Plasmas
SC Engineering; Physics
GA BG6ZR
UT WOS:000391073600016
ER
PT J
AU Lockwood, NP
Pitz, GA
Fairchild, SB
Lange, MA
AF Lockwood, Nathaniel P.
Pitz, Greg A.
Fairchild, Steven B.
Lange, Matthew A.
GP IEEE
TI FIELD EMISSION EXCITATION OF A HIGH PRESSURE NOBLE GAS
SO 2016 43RD IEEE INTERNATIONAL CONFERENCE ON PLASMA SCIENCE (ICOPS)
LA English
DT Meeting Abstract
CT 43rd IEEE International Conference on Plasma Science (ICOPS)
CY JUN 19-23, 2016
CL Banff, CANADA
SP IEEE Nucl & Plasma Sci Soc, Plasma Sci & Applicat Comm, IEEE
C1 [Lockwood, Nathaniel P.; Pitz, Greg A.; Fairchild, Steven B.] Air Force Res Lab, Kirtland AFB, NM 87117 USA.
[Lange, Matthew A.] XLScientific, Albuquerque, NM 87110 USA.
NR 1
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-9601-1
PY 2016
PG 1
WC Engineering, Multidisciplinary; Physics, Fluids & Plasmas
SC Engineering; Physics
GA BG6ZR
UT WOS:000391073600445
ER
PT J
AU Murray, PT
Fairchild, SB
Back, TC
Gortat, D
Sparkes, M
Gruen, GJ
Lockwood, NP
AF Murray, P. T.
Fairchild, S. B.
Back, T. C.
Gortat, D.
Sparkes, M.
Gruen, G. J.
Lockwood, N. P.
GP IEEE
TI LASER SURFACE MELTING OF STAINLESS STEEL ANODES FOR REDUCED HYDROGEN
OUTGASSING
SO 2016 43RD IEEE INTERNATIONAL CONFERENCE ON PLASMA SCIENCE (ICOPS)
LA English
DT Meeting Abstract
CT 43rd IEEE International Conference on Plasma Science (ICOPS)
CY JUN 19-23, 2016
CL Banff, CANADA
SP IEEE Nucl & Plasma Sci Soc, Plasma Sci & Applicat Comm, IEEE
C1 [Murray, P. T.; Back, T. C.; Gruen, G. J.] Univ Dayton, Res Inst, Dayton, OH 45469 USA.
[Fairchild, S. B.; Sparkes, M.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Gortat, D.] Univ Cambridge, Inst Mfg, Cambridge CB3 0FS, England.
[Lockwood, N. P.] Air Force Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-9601-1
PY 2016
PG 1
WC Engineering, Multidisciplinary; Physics, Fluids & Plasmas
SC Engineering; Physics
GA BG6ZR
UT WOS:000391073600128
ER
PT J
AU Schmitt-Sody, A
Elle, JA
Domonkos, MT
Luccro, A
Ting, AC
Hasson, V
AF Schmitt-Sody, Andreas
Elle, Jennifer A.
Domonkos, Matthew T.
Luccro, Adrian
Ting, Antonio C.
Hasson, Victor
GP IEEE
TI Laser plasmas from picosecond laser filamentation in the atmosphere and
its application on guided high voltage discharges
SO 2016 43RD IEEE INTERNATIONAL CONFERENCE ON PLASMA SCIENCE (ICOPS)
LA English
DT Meeting Abstract
CT 43rd IEEE International Conference on Plasma Science (ICOPS)
CY JUN 19-23, 2016
CL Banff, CANADA
SP IEEE Nucl & Plasma Sci Soc, Plasma Sci & Applicat Comm, IEEE
C1 [Schmitt-Sody, Andreas; Elle, Jennifer A.; Domonkos, Matthew T.] Air Force Res Lab, Albuquerque, NM 87117 USA.
[Luccro, Adrian] Boeing DES, Albuquerque, NM 87117 USA.
[Ting, Antonio C.] Naval Res Lab, Washington, DC 20375 USA.
[Hasson, Victor] Univ Arizona, Tucson, AZ 85721 USA.
NR 4
TC 0
Z9 0
U1 1
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-9601-1
PY 2016
PG 1
WC Engineering, Multidisciplinary; Physics, Fluids & Plasmas
SC Engineering; Physics
GA BG6ZR
UT WOS:000391073600163
ER
PT J
AU Tang, W
Shiffler, D
LaCour, M
Golby, K
Knowles, T
AF Tang, W.
Shiffler, D.
LaCour, M.
Golby, K.
Knowles, T.
GP IEEE
TI Study of the Electric Field Screening Effect on Low Number of Carbon
Fiber Field Emitters
SO 2016 43RD IEEE INTERNATIONAL CONFERENCE ON PLASMA SCIENCE (ICOPS)
LA English
DT Meeting Abstract
CT 43rd IEEE International Conference on Plasma Science (ICOPS)
CY JUN 19-23, 2016
CL Banff, CANADA
SP IEEE Nucl & Plasma Sci Soc, Plasma Sci & Applicat Comm, IEEE
C1 [Tang, W.; Shiffler, D.] Air Force Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA.
[LaCour, M.; Golby, K.] SAIC Inc, Albuquerque, NM 87117 USA.
[Knowles, T.] Energy Sci Labs Inc, San Diego, CA 92121 USA.
NR 2
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-9601-1
PY 2016
PG 1
WC Engineering, Multidisciplinary; Physics, Fluids & Plasmas
SC Engineering; Physics
GA BG6ZR
UT WOS:000391073600116
ER
PT S
AU Carbino, TJ
Temple, MA
Lopez, J
AF Carbino, Timothy J.
Temple, Michael A.
Lopez, Juan, Jr.
GP IEEE
TI Conditional Constellation Based-Distinct Native Attribute (CB-DNA)
Fingerprinting for Network Device Authentication
SO 2016 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC)
SE IEEE International Conference on Communications
LA English
DT Proceedings Paper
CT IEEE International Conference on Communications (ICC)
CY MAY 22-27, 2016
CL Kuala Lumpur, MALAYSIA
SP IEEE
AB Hackers have multiple avenues for accessing Industrial Control System (ICS) and can adversely impact network hardware, operating systems, and executables. This includes attacking hardware/software switches commonly used in waste water, water treatment, and power substation facilities. Unauthorized network intrusion can be mitigated by augmenting Media Access Control (MAC) based device identity (ID) verification processes using Physical-Layer (PHY) features. PHY augmentation is addressed here using Constellation Based Distinct Native Attribute (CB-DNA) features derived from unintentional Ethernet cable emissions. Collected emission symbols are mapped to a gradient-based binary constellation space where, for the first time, conditional constellation symbol features are used for device ID verification. Serial number discrimination is assessed using 16 devices from 4 different manufactures, with 12 serving as authorized devices and 4 (one from each manufacturer) serving as attacking rogue devices. Collectively considering 12,288 rogue attack scenarios using 256 verification models, the proposed CBDNA method is promising and yielded average Rogue Reject Rates (RRR) of 85.2%< RRR< 93.1% at SNR >= 26.0 dB using two network access criteria.
C1 [Carbino, Timothy J.; Temple, Michael A.; Lopez, Juan, Jr.] US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Carbino, TJ (reprint author), US Air Force, Inst Technol, Wright Patterson AFB, OH 45433 USA.
EM timothy.carbino@afit.edu; michael.temple@afit.edu;
juan.lopez.ctr@afit.edu
NR 22
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1550-3607
BN 978-1-4799-6664-6
J9 IEEE ICC
PY 2016
PG 6
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BG6YK
UT WOS:000390993205057
ER
PT S
AU Casbeer, DW
Garcia, E
Pachter, M
AF Casbeer, David W.
Garcia, Eloy
Pachter, Meir
GP IEEE
TI The Target Differential Game with Two Defenders
SO 2016 INTERNATIONAL CONFERENCE ON UNMANNED AIRCRAFT SYSTEMS (ICUAS)
SE International Conference on Unmanned Aircraft Systems
LA English
DT Proceedings Paper
CT International Conference on Unmanned Aircraft Systems (ICUAS)
CY JUN 07-10, 2016
CL Arlington, VA
SP IEEE, IEEE Robot & Automat Soc, IEEE CSS, MCA
ID ACTIVE AIRCRAFT PROTECTION; COOPERATIVE STRATEGIES; HOMING MISSILE;
GUIDANCE; PURSUIT; DEFENSE; LINE
AB A cooperative aircraft differential game where an Attacker missile pursues a Target aircraft is addressed. The Target aircraft cooperates with up to two Defender missiles which are launched in order to intercept the Attacker before the latter reaches the Target. The results in this paper build on the solution of a three agent differential game, where the three players are the Target, the Attacker, and one Defender; in this paper, the benefits of firing a second Defender are considered. By using the solution of the one-Defender problem, it is possible to address a seemingly intractable problem, where the Target needs to decide which Defender to cooperate with, in addition to obtaining the optimal headings of every player in the game. We consider the case of a static Target and the case of a dynamic Target. For both cases, given the initial positions of the players, we solve the problem of determining if a second Defender improves the Target/Defender(s) payoff and we also provide the optimal strategies for each one of the agents involved in this differential game.
C1 [Casbeer, David W.] US Air Force, Res Lab, Control Sci Ctr Excellence, Wright Patterson AFB, OH 45433 USA.
[Garcia, Eloy] Infoscitex Corp, Dayton, OH USA.
[Pachter, Meir] Air Force Inst Technol, Dept Elect Engn, Wright Patterson AFB, OH USA.
RP Casbeer, DW (reprint author), US Air Force, Res Lab, Control Sci Ctr Excellence, Wright Patterson AFB, OH 45433 USA.
EM david.casbeer@us.af.mil; elgarcia@infoscitex.com; meir.pachter@afit.edu
NR 28
TC 0
Z9 0
U1 1
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2373-6720
BN 978-1-4673-9333-1
J9 INT CONF UNMAN AIRCR
PY 2016
BP 202
EP 210
PG 9
WC Engineering, Aerospace; Engineering, Electrical & Electronic; Remote
Sensing
SC Engineering; Remote Sensing
GA BG6WU
UT WOS:000390883100025
ER
PT S
AU Munishkin, AA
Milutinovic, D
Casbeer, DW
AF Munishkin, Alexey A.
Milutinovic, Dejan
Casbeer, David W.
GP IEEE
TI Stochastic Optimal Control Navigation with the Avoidance of Unsafe
Configurations
SO 2016 INTERNATIONAL CONFERENCE ON UNMANNED AIRCRAFT SYSTEMS (ICUAS)
SE International Conference on Unmanned Aircraft Systems
LA English
DT Proceedings Paper
CT International Conference on Unmanned Aircraft Systems (ICUAS)
CY JUN 07-10, 2016
CL Arlington, VA
SP IEEE, IEEE Robot & Automat Soc, IEEE CSS, MCA
ID GAMES
AB Long-time planning horizons are required to safely navigate one vehicle in the presence of another, possibly non-cooperative vehicle. They give rise to computational issues preventing the real-time implementation of safe navigation algorithms. In this paper, we consider two nonholonomic vehicles, of which one (blue) has the goal to enter the "tail" of the other (red). Neither the goal nor the navigation strategy of the red vehicle is known by the blue vehicle. To anticipate this uncertainty, the blue vehicle uses infinite horizon stochastic optimal control. Using the stochastic optimal control and backward Kolmogorov equation, the blue is navigated to avoid unsafe configurations from which the red can enter the "tail" of the blue and gain advantage over it. Our results are illustrated by numerical simulations and the feasibility of the control for the real-time implementation is tested with small-scale robot experiments.
C1 [Munishkin, Alexey A.] Univ Calif Santa Cruz, Santa Cruz, CA 95064 USA.
[Milutinovic, Dejan] Univ Calif Santa Cruz, Dept Comp Engn, Santa Cruz, CA 95064 USA.
[Casbeer, David W.] US Air Force, Res Lab, Control Sci Ctr Excellence, Wright Patterson AFB, OH USA.
RP Munishkin, AA (reprint author), Univ Calif Santa Cruz, Santa Cruz, CA 95064 USA.
NR 13
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2373-6720
BN 978-1-4673-9333-1
J9 INT CONF UNMAN AIRCR
PY 2016
BP 211
EP 218
PG 8
WC Engineering, Aerospace; Engineering, Electrical & Electronic; Remote
Sensing
SC Engineering; Remote Sensing
GA BG6WU
UT WOS:000390883100026
ER
PT S
AU Manyam, S
Rathinam, S
Casbeer, D
AF Manyam, Satyanarayana
Rathinam, Sivakumar
Casbeer, David
GP IEEE
TI Dubins Paths Through a Sequence of Points: Lower and Upper Bounds
SO 2016 INTERNATIONAL CONFERENCE ON UNMANNED AIRCRAFT SYSTEMS (ICUAS)
SE International Conference on Unmanned Aircraft Systems
LA English
DT Proceedings Paper
CT International Conference on Unmanned Aircraft Systems (ICUAS)
CY JUN 07-10, 2016
CL Arlington, VA
SP IEEE, IEEE Robot & Automat Soc, IEEE CSS, MCA
ID SHORTEST PATHS; CURVATURE; OPTIMIZATION; ALGORITHM
AB This article addresses an important path planning problem for robots and Unmanned Aerial Vehicles (UAVs) which aims to find a shortest path of bounded curvature passing through a given sequence of target points on a ground plane. Currently, there is no algorithm that can compute an optimal solution to this problem. Therefore, tight lower bounds are vital in determining the quality of any feasible solution to this problem. Novel tight lower bounding algorithms are presented in this article by relaxing some of the heading angle constraints at the target points. The proposed approach requires us to solve variants of an optimization problem called the Dubins interval problem between two points where the heading angles at the points are constrained to be within a specified interval. These variants can be solved using tools from optimal control theory. Specifically, two lower bounding algorithms are presented in this article using this approach and these bounds are then compared with the existing results in the literature. Computational results are also presented to corroborate the performance of the proposed algorithms.
C1 [Manyam, Satyanarayana; Casbeer, David] US Air Force, Res Lab, Control Sci Ctr Excellence, Wright Patterson AFB, OH USA.
[Rathinam, Sivakumar] Texas A&M Univ, Dept Mech Engn, College Stn, TX 77843 USA.
RP Manyam, S (reprint author), US Air Force, Res Lab, Control Sci Ctr Excellence, Wright Patterson AFB, OH USA.
NR 24
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2373-6720
BN 978-1-4673-9333-1
J9 INT CONF UNMAN AIRCR
PY 2016
BP 284
EP 291
PG 8
WC Engineering, Aerospace; Engineering, Electrical & Electronic; Remote
Sensing
SC Engineering; Remote Sensing
GA BG6WU
UT WOS:000390883100035
ER
PT S
AU Avram, RC
Zhang, XD
Muse, J
Clark, M
AF Avram, Remus C.
Zhang, Xiaodong
Muse, Jonathan
Clark, Matthew
GP IEEE
TI Nonlinear Adaptive Control Design and Controller Integrity Monitoring
for Quadrotor UAVs
SO 2016 INTERNATIONAL CONFERENCE ON UNMANNED AIRCRAFT SYSTEMS (ICUAS)
SE International Conference on Unmanned Aircraft Systems
LA English
DT Proceedings Paper
CT International Conference on Unmanned Aircraft Systems (ICUAS)
CY JUN 07-10, 2016
CL Arlington, VA
SP IEEE, IEEE Robot & Automat Soc, IEEE CSS, MCA
AB This paper presents a nonlinear adaptive fault-tolerant control algorithm for accommodating actuator faults in quadrotor UAVs and an online controller integrity method for assuring safety of adaptive control system in the presence of controller software faults. The actuator faults considered in this paper are modeled as partial losses of effectiveness in one of the rotors. Using adaptive backstepping techniques, a nonlinear indirect adaptive controller is designed for the quadrotor altitude and attitude system. The adaptive control algorithm guarantees closed-loop system stability and asymptotic tracking performance even in the presence of actuator faults. However, the occurrence of faults in the embedded adaptive control software may lead to unstable adaptation behaviors and malfunctions of the control algorithm. Based on Lyapunov stability criterion, an online controller integrity monitoring method is developed to detect such controller software faults. Adaptive thresholds for software fault detection are derived, ensuring the robustness with respect to fault parameter approximation error. The proposed adaptive controller and the controller integrity monitoring algorithm are implemented and evaluated using a real-time indoor quadrotor test environment.
C1 [Avram, Remus C.; Zhang, Xiaodong] Wright State Univ, Dept Elect Engn, Dayton, OH 45435 USA.
[Muse, Jonathan; Clark, Matthew] US Air Force, Res Lab, Dayton, OH 45433 USA.
RP Avram, RC (reprint author), Wright State Univ, Dept Elect Engn, Dayton, OH 45435 USA.
EM avram.3@wright.edu; xiaodong.zhang@wright.edu;
jonathan.muse.2@us.af.mil; matthew.clark.20@us.af.mil
NR 18
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2373-6720
BN 978-1-4673-9333-1
J9 INT CONF UNMAN AIRCR
PY 2016
BP 301
EP 309
PG 9
WC Engineering, Aerospace; Engineering, Electrical & Electronic; Remote
Sensing
SC Engineering; Remote Sensing
GA BG6WU
UT WOS:000390883100037
ER
PT S
AU Koch, DP
McLain, TW
Brink, KM
AF Koch, Daniel P.
McLain, Timothy W.
Brink, Kevin M.
GP IEEE
TI Multi-Sensor Robust Relative Estimation Framework for GPS-Denied
Multirotor Aircraft
SO 2016 INTERNATIONAL CONFERENCE ON UNMANNED AIRCRAFT SYSTEMS (ICUAS)
SE International Conference on Unmanned Aircraft Systems
LA English
DT Proceedings Paper
CT International Conference on Unmanned Aircraft Systems (ICUAS)
CY JUN 07-10, 2016
CL Arlington, VA
SP IEEE, IEEE Robot & Automat Soc, IEEE CSS, MCA
AB An estimation framework is presented that improves the robustness of GPS-denied state estimation to changing environmental conditions by fusing updates from multiple view-based odometry algorithms. This allows the vehicle to utilize a suite of complementary exteroceptive sensors or sensing modalities. By estimating the vehicle states relative to a local coordinate frame collocated with an odometry keyframe, observability of the relative state is maintained. A description of the general framework is given, as well as the specific equations for a multiplicative extended Kalman filter with a multirotor vehicle. Experimental results are presented that demonstrate the ability of the proposed algorithm to produce accurate and consistent estimates in challenging environments that cause a single-sensor solution to fail.
C1 [Koch, Daniel P.] Brigham Young Univ, Dept Mech Engn, Provo, UT 84602 USA.
[McLain, Timothy W.] Brigham Young Univ, Fac Mech Engn, Provo, UT 84602 USA.
[Brink, Kevin M.] Air Force Res Lab, Munit Directorate, Wright Patterson AFB, OH USA.
RP Koch, DP (reprint author), Brigham Young Univ, Dept Mech Engn, Provo, UT 84602 USA.
EM daniel.koch@byu.edu; mclain@byu.edu
NR 16
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2373-6720
BN 978-1-4673-9333-1
J9 INT CONF UNMAN AIRCR
PY 2016
BP 589
EP 597
PG 9
WC Engineering, Aerospace; Engineering, Electrical & Electronic; Remote
Sensing
SC Engineering; Remote Sensing
GA BG6WU
UT WOS:000390883100072
ER
PT S
AU Grymin, DJ
Farhood, M
AF Grymin, David J.
Farhood, Mazen
GP IEEE
TI Longitudinal Model Identification of a Small Fixed-Wing UAV Using Motion
Capture Data
SO 2016 INTERNATIONAL CONFERENCE ON UNMANNED AIRCRAFT SYSTEMS (ICUAS)
SE International Conference on Unmanned Aircraft Systems
LA English
DT Proceedings Paper
CT International Conference on Unmanned Aircraft Systems (ICUAS)
CY JUN 07-10, 2016
CL Arlington, VA
SP IEEE, IEEE Robot & Automat Soc, IEEE CSS, MCA
ID AIRCRAFT; COEFFICIENTS; TRACKING
AB Time-domain aircraft system identification is applied to flight test data obtained using a motion capture system. Longitudinal aerodynamic force and moment time histories are obtained using the estimation-before-modeling approach, in which forces and moments are modeled as Gauss-Markov processes and estimated concurrently with the aircraft state histories using an extended Kalman filter. Quasi-steady aerodynamic models are then developed to capture the variation in the longitudinal aerodynamic coefficients observed during tests. Three model formulations are investigated: a simple stability and control derivative model, a model utilizing spline functions of the independent variables to capture variation over a large envelope, and a global polynomial model. Despite the large flight envelope and large amplitude pitching motions observed, all three quasi-steady model formulations are able to capture the aerodynamic behavior reasonably well. Comparison of the models via simulation of the aircraft dynamics indicates that the global polynomial model is superior to the other models in capturing the aerodynamic behavior of the system.
C1 [Grymin, David J.] US Air Force, Aerosp Syst Directorate, Res Lab, Wright Patterson AFB, OH 45434 USA.
[Farhood, Mazen] Virginia Tech, Dept Aerosp & Ocean Engn, Blacksburg, VA 24061 USA.
RP Grymin, DJ (reprint author), US Air Force, Aerosp Syst Directorate, Res Lab, Wright Patterson AFB, OH 45434 USA.
EM david.grymin.1@us.af.mil; farhood@vt.edu
NR 31
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2373-6720
BN 978-1-4673-9333-1
J9 INT CONF UNMAN AIRCR
PY 2016
BP 742
EP 751
PG 10
WC Engineering, Aerospace; Engineering, Electrical & Electronic; Remote
Sensing
SC Engineering; Remote Sensing
GA BG6WU
UT WOS:000390883100091
ER
PT S
AU Letendre, CLA
AF Letendre, Colonel Line A.
GP IEEE
TI Lethal Autonomous Weapon Systems: Translating Legal Jargon For Engineers
SO 2016 INTERNATIONAL CONFERENCE ON UNMANNED AIRCRAFT SYSTEMS (ICUAS)
SE International Conference on Unmanned Aircraft Systems
LA English
DT Proceedings Paper
CT International Conference on Unmanned Aircraft Systems (ICUAS)
CY JUN 07-10, 2016
CL Arlington, VA
SP IEEE, IEEE Robot & Automat Soc, IEEE CSS, MCA
AB This article provides an overview of international law governing the use of autonomous weapon systems (AWS) in an armed conflict. Using the lens of autonomous systems, the article introduces basic international humanitarian law concepts, explains the legal framework behind what makes a weapon legal, and discusses the legal parameters surrounding employment of weapon systems. It also suggests a number of questions that engineers should ask attorneys during the design process in order to design autonomous systems that comply with the laws of armed conflict.
C1 [Letendre, Colonel Line A.] US Air Force Acad, Dept Law, Colorado Springs, CO 80840 USA.
RP Letendre, CLA (reprint author), US Air Force Acad, Dept Law, Colorado Springs, CO 80840 USA.
EM linell.letendre@usafa.edu
NR 13
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2373-6720
BN 978-1-4673-9333-1
J9 INT CONF UNMAN AIRCR
PY 2016
BP 795
EP 800
PG 6
WC Engineering, Aerospace; Engineering, Electrical & Electronic; Remote
Sensing
SC Engineering; Remote Sensing
GA BG6WU
UT WOS:000390883100098
ER
PT S
AU Zoldi, DMK
Speirs, GR
Reith, PS
AF Zoldi, Dawn M. K.
Speirs, Gregory R.
Reith, Peter S.
GP IEEE
TI Countering the Small Unmanned Aircraft System (SUAS) Threat in the
United States Homeland: Technological and Legal Challenges
SO 2016 INTERNATIONAL CONFERENCE ON UNMANNED AIRCRAFT SYSTEMS (ICUAS)
SE International Conference on Unmanned Aircraft Systems
LA English
DT Proceedings Paper
CT International Conference on Unmanned Aircraft Systems (ICUAS)
CY JUN 07-10, 2016
CL Arlington, VA
SP IEEE, IEEE Robot & Automat Soc, IEEE CSS, MCA
C1 [Zoldi, Dawn M. K.; Speirs, Gregory R.; Reith, Peter S.] US Air Force, Washington, DC 20330 USA.
RP Zoldi, DMK (reprint author), US Air Force, Washington, DC 20330 USA.
EM dawn.zoldi@us.af.mil; gregory.speirs.1@us.af.mil;
peter.reith.1@us.af.mil
NR 22
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2373-6720
BN 978-1-4673-9333-1
J9 INT CONF UNMAN AIRCR
PY 2016
BP 820
EP 829
PG 10
WC Engineering, Aerospace; Engineering, Electrical & Electronic; Remote
Sensing
SC Engineering; Remote Sensing
GA BG6WU
UT WOS:000390883100101
ER
PT S
AU Ashokkumar, CR
York, GWP
Gruber, SF
AF Ashokkumar, Chimpalthradi R.
York, George W. P.
Gruber, Scott F.
GP IEEE
TI Fault Tolerant Margins of an UAV at Uncertain Environment
SO 2016 INTERNATIONAL CONFERENCE ON UNMANNED AIRCRAFT SYSTEMS (ICUAS)
SE International Conference on Unmanned Aircraft Systems
LA English
DT Proceedings Paper
CT International Conference on Unmanned Aircraft Systems (ICUAS)
CY JUN 07-10, 2016
CL Arlington, VA
SP IEEE, IEEE Robot & Automat Soc, IEEE CSS, MCA
ID FLIGHT CONTROL; PARAMETRIC STABILITY; NONLINEAR-SYSTEMS; ROBUST
STABILITY; LINEAR-CONTROL; AIRCRAFT; DESIGN
AB In fault tolerant control, the damaged and healthy states of a sensor output or a control input are captured by using an uncertain parameter. For instance, the control input u(t) resulting from an actuator is modeled sigma u(t) and the healthy and damaged conditions are inferred from a which takes the values sigma=1 and sigma in [0, 1), respectively [1-3]. Given a stabilizing controller, a range of sigma-values in the interval [0,1) for which the closed loop system would remain stable is referred as the fault tolerant margin. In this paper, several of these margins are presented when aerodynamic parameter variations due to an uncertain atmospheric condition in an unmanned aerial vehicle (UAV) are present. It is shown that the fault tolerant margins are extremely sensitive to these parameter perturbations. Some perturbation locations can significantly reduce the stable range for parameter values as well as for the fault tolerant margins. An UAV model is considered to illustrate the fault tolerant margins and admissible parameter variations. Secondly, the algorithm applied to compute the fault tolerant margins is used to solve the examples of Professor Ross B Barmish et al [29] and hence the exact stability margins for a two parameter system are illustrated. However, when the number of parameters increases, the algorithm becomes computationally intensive.
C1 [Ashokkumar, Chimpalthradi R.] US Air Force Acad, Dept Elect & Comp Engn, Colorado Springs, CO 80840 USA.
[York, George W. P.; Gruber, Scott F.] US Air Force Acad, Ctr Unmanned Aircraft Syst Res, Dept Elect & Comp Engn, Colorado Springs, CO 80840 USA.
RP Ashokkumar, CR (reprint author), US Air Force Acad, Dept Elect & Comp Engn, Colorado Springs, CO 80840 USA.
EM chimpalthradi@gmail.com; george.york@usafa.edu;
Scott.Gruber.ctr@usafa.edu
NR 39
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2373-6720
BN 978-1-4673-9333-1
J9 INT CONF UNMAN AIRCR
PY 2016
BP 1273
EP 1279
PG 7
WC Engineering, Aerospace; Engineering, Electrical & Electronic; Remote
Sensing
SC Engineering; Remote Sensing
GA BG6WU
UT WOS:000390883100158
ER
PT S
AU Rasmussen, S
Kalyanam, K
Kingston, D
AF Rasmussen, Steven
Kalyanam, Krishnamoorthy
Kingston, Derek
GP IEEE
TI Field Experiment of a Fully Autonomous Multiple UAV/UGS Intruder
Detection and Monitoring System
SO 2016 INTERNATIONAL CONFERENCE ON UNMANNED AIRCRAFT SYSTEMS (ICUAS)
SE International Conference on Unmanned Aircraft Systems
LA English
DT Proceedings Paper
CT International Conference on Unmanned Aircraft Systems (ICUAS)
CY JUN 07-10, 2016
CL Arlington, VA
SP IEEE, IEEE Robot & Automat Soc, IEEE CSS, MCA
AB This document describes the motivation, theoretical description, development, and field test of a system utilizing multiple Unmanned Aerial Vehicles (UAV)s that cooperate with each other, using Unattended Ground Sensors (UGS), to monitor an area, detect intruder vehicles, capture imagery of the intruders, and deliver that imagery to the home base. Since the UAVs have no sensors/perception algorithms that they can use to detect the intruder, they rely on off-board sensors, the UGS, to do this. The experiment was conducted in a realistic environment and during the experiment, the UAVs made all decisions and took all actions without human intervention.
C1 [Rasmussen, Steven] Air Force Res Lab, Miami Valley Aerosp LLC, Wright Patterson AFB, OH 45433 USA.
[Kalyanam, Krishnamoorthy] Air Force Res Lab, InfoSciTex Corp, Wright Patterson AFB, OH USA.
[Kingston, Derek] US Air Force, Air Force Res Lab, Wright Patterson AFB, OH USA.
RP Rasmussen, S (reprint author), Air Force Res Lab, Miami Valley Aerosp LLC, Wright Patterson AFB, OH 45433 USA.
EM Steve.Rasmussen@MVAero.com; krishnak@ucla.edu; derek.kingston@us.af.mil
NR 26
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2373-6720
BN 978-1-4673-9333-1
J9 INT CONF UNMAN AIRCR
PY 2016
BP 1293
EP 1302
PG 10
WC Engineering, Aerospace; Engineering, Electrical & Electronic; Remote
Sensing
SC Engineering; Remote Sensing
GA BG6WU
UT WOS:000390883100161
ER
PT J
AU Gabert, S
Jackson, JA
Kappedal, R
AF Gabert, Scott
Jackson, Julie Ann
Kappedal, Ryan
GP IEEE
TI Estimating PDFs in Heterogeneous Radar Clutter
SO 2016 USNC-URSI RADIO SCIENCE MEETING (JOINT WITH AP-S SYMPOSIUM)
LA English
DT Proceedings Paper
CT IEEE International Symposium on Antennas and Propagation / USNC-URSI
Radio Science Meeting
CY JUN 26-JUL 01, 2016
CL IEEE Reg 9, Fajardo, PR
SP USNC, URSI, Inst Elect & Elect Engineers, IEEE Antennas & Propagat Soc
HO IEEE Reg 9
AB Real-world radar resolution cells often contain several terrain types, such that the observed normalized radar cross section of a given clutter cell is an aggregate response from the underlying terrains. These heterogeneous resolution cells create an ill-posed inverse problem in estimating the scattering phenomenology from each terrain type. Assuming the terrain composition of each cell is known (e.g. through Land Use Land Cover maps) and adopting a linear mixing model, we formulate a well-posed but numerically challenging inverse problem. The Markov Chain Monte Carlo technique known as Metropolis Hasting is successfully implemented to extract the underlying Gamma clutter distribution parameters of each terrain type from the heterogeneous clutter cells.
C1 [Gabert, Scott] Air Force Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
[Jackson, Julie Ann] Air Force Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH USA.
[Kappedal, Ryan] Air Force Inst Technol, Dept Math & Stat, Wright Patterson AFB, OH USA.
RP Gabert, S (reprint author), Air Force Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
EM scott.gabert.1@us.af.mil; julie.jackson.4@us.af.mil;
ryan.kappedal@us.af.mil
NR 6
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-5090-2852-8
PY 2016
BP 97
EP 98
PG 2
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BG6YL
UT WOS:000390996200048
ER
EF