FN Thomson Reuters Web of Science™
VR 1.0
PT J
AU Jiang, W
Fu, QQ
Fan, HY
Wang, W
AF Jiang, Wei
Fu, Qingquan
Fan, Hongyou
Wang, Wei
TI An NBD fluorophore-based sensitive and selective fluorescent probe for
zinc ion
SO CHEMICAL COMMUNICATIONS
LA English
DT Article
ID AQUEOUS-SOLUTION; ZN2+; SENSORS; DESIGN; RECOGNITION; CHEMOSENSOR;
CHROMOPHORE; ANISOTROPY; CHEMISTRY; EMISSION
AB A novel NBD-derived fluorescent probe for Zn2+ is described; the probe features ready availability, good water solubility, high sensitivity and selectivity, and ability to quantify the concentration of Zn2+.
C1 [Jiang, Wei; Fu, Qingquan; Wang, Wei] Univ New Mexico, Dept Chem & Chem Biol, Albuquerque, NM 87131 USA.
[Fan, Hongyou] Sandia Natl Labs, Ceram Proc & Inorgan Mat Dept, Albuquerque, NM 87185 USA.
RP Wang, W (reprint author), Univ New Mexico, Dept Chem & Chem Biol, Albuquerque, NM 87131 USA.
EM wwang@unm.edu
FU NCRR NIH HHS [P20 RR016480]
NR 38
TC 85
Z9 88
U1 1
U2 22
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1359-7345
J9 CHEM COMMUN
JI Chem. Commun.
PY 2008
IS 2
BP 259
EP 261
DI 10.1039/b712377a
PG 3
WC Chemistry, Multidisciplinary
SC Chemistry
GA 243BU
UT WOS:000251770700044
PM 18092106
ER
PT J
AU Custelcean, R
AF Custelcean, Radu
TI Crystal engineering with urea and thiourea hydrogen-bonding groups
SO CHEMICAL COMMUNICATIONS
LA English
DT Article
ID METAL-ORGANIC FRAMEWORKS; MOLECULAR TECTONICS; SELECTIVE
CRYSTALLIZATION; SUPRAMOLECULAR SYNTHESIS; COORDINATION POLYMERS; ANION
COORDINATION; COUNTER-ANIONS; NEUTRAL UREA; DESIGN; NETWORKS
AB The utilization of N, N'-disubstituted ureas and thioureas as design elements in the synthesis of crystalline organic solids is reviewed. These hydrogen-bonding units are versatile yet predictable building blocks that can be rationally employed in both crystal assembly and functionalization.
C1 Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
RP Custelcean, R (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
EM custelceanr@ornl.gov
RI Custelcean, Radu/C-1037-2009
OI Custelcean, Radu/0000-0002-0727-7972
NR 88
TC 184
Z9 184
U1 5
U2 58
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1359-7345
J9 CHEM COMMUN
JI Chem. Commun.
PY 2008
IS 3
BP 295
EP 307
DI 10.1039/b708921j
PG 13
WC Chemistry, Multidisciplinary
SC Chemistry
GA 247TU
UT WOS:000252106300002
PM 18401890
ER
PT J
AU Yang, JB
Liu, DJ
Kariuki, NN
Chen, LX
AF Yang, Junbing
Liu, Di-Jia
Kariuki, Nancy N.
Chen, Lin X.
TI Aligned carbon nanotubes with built-in FeN4 active sites for
electrocatalytic reduction of oxygen
SO CHEMICAL COMMUNICATIONS
LA English
DT Article
ID FUEL-CELL CONDITIONS; CATALYSTS; ELECTROLYTE; PYROLYSIS
AB The electrocatalytic site FeN4, which is active towards the oxygen reduction reaction, is incorporated into the graphene layer of aligned carbon nanotubes prepared through a chemical vapour deposition process, as is confirmed by X-ray absorption spectroscopy and other characterization techniques.
C1 [Yang, Junbing; Liu, Di-Jia; Kariuki, Nancy N.; Chen, Lin X.] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA.
RP Liu, DJ (reprint author), Argonne Natl Lab, Chem Sci & Engn Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM djliu@anl.gov
RI Yang, Junbing/E-4316-2010
NR 17
TC 120
Z9 122
U1 8
U2 68
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1359-7345
J9 CHEM COMMUN
JI Chem. Commun.
PY 2008
IS 3
BP 329
EP 331
DI 10.1039/b713096a
PG 3
WC Chemistry, Multidisciplinary
SC Chemistry
GA 247TU
UT WOS:000252106300010
PM 18399197
ER
PT J
AU Del Sesto, RE
McCleskey, TM
Burrell, AK
Baker, GA
Thompson, JD
Scott, BL
Wilkes, JS
Williams, P
AF Del Sesto, Rico E.
McCleskey, T. Mark
Burrell, Anthony K.
Baker, Gary A.
Thompson, Joe D.
Scott, Brian L.
Wilkes, John S.
Williams, Peg
TI Structure and magnetic behavior of transition metal based ionic liquids
SO CHEMICAL COMMUNICATIONS
LA English
DT Article
ID CHLORIDE MOLTEN-SALT; SPECTROSCOPIC CHARACTERIZATION; CHLOROALUMINATE
MELTS; PHYSICAL-PROPERTIES; IRON(III); ELECTROCHEMISTRY; COMPLEXES;
COPPER(I); MIXTURES; SPECTRA
AB A series of ionic liquids containing different paramagnetic anions have been prepared and all show paramagnetic behavior with potential applications for magnetic and electrochromic switching as well as novel magnetic transport; also, the tetraalkylphosphonium-based ionic liquids reveal anomalous magnetic behavior.
C1 [Del Sesto, Rico E.; McCleskey, T. Mark; Burrell, Anthony K.; Scott, Brian L.] Los Alamos Natl Lab, MPA MC, Los Alamos, NM 87545 USA.
[Baker, Gary A.] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
[Thompson, Joe D.] Los Alamos Natl Lab, MPA 10, Los Alamos, NM 87545 USA.
[Wilkes, John S.; Williams, Peg] USAF Acad, Dept Chem, Colorado Springs, CO 80840 USA.
RP Del Sesto, RE (reprint author), Los Alamos Natl Lab, MPA MC, Los Alamos, NM 87545 USA.
EM ricod@lanl.gov
RI McCleskey, Thomas/J-4772-2012; Baker, Gary/H-9444-2016; Scott,
Brian/D-8995-2017;
OI Baker, Gary/0000-0002-3052-7730; Scott, Brian/0000-0003-0468-5396;
Mccleskey, Thomas/0000-0003-3750-3245
NR 26
TC 151
Z9 152
U1 14
U2 104
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1359-7345
J9 CHEM COMMUN
JI Chem. Commun.
PY 2008
IS 4
BP 447
EP 449
DI 10.1039/b711189d
PG 3
WC Chemistry, Multidisciplinary
SC Chemistry
GA 249UD
UT WOS:000252254500006
PM 18188463
ER
PT J
AU Pallan, PS
Ittig, D
Heroux, A
Wawrzak, Z
Leumann, CJ
Egli, M
AF Pallan, Pradeep S.
Ittig, Damian
Heroux, Annie
Wawrzak, Zdzislaw
Leumann, Christian J.
Egli, Martin
TI Crystal structure of tricyclo-DNA: an unusual compensatory change of two
adjacent backbone torsion angles
SO CHEMICAL COMMUNICATIONS
LA English
DT Article
ID BASE-PAIRING PROPERTIES; BIOPHYSICAL PROPERTIES; IONS; FORM; RNA;
REPLACEMENT; RESISTANCE; ANALOGS; SYSTEM; DUPLEX
AB The crystal structure of a DNA duplex with tricyclo-DNA (tc-DNA) residues explains the increased RNA affinity of tc-DNA relative to DNA and tc-DNA's superior resistance to nucleases.
C1 [Pallan, Pradeep S.; Egli, Martin] Vanderbilt Univ, Dept Biochem, Sch Med, Nashville, TN 37232 USA.
[Ittig, Damian; Leumann, Christian J.] Univ Bern, Dept Chem & Biochem, CH-3012 Bern, Switzerland.
[Heroux, Annie] Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA.
[Wawrzak, Zdzislaw] Argonne Natl Lab, Adv Photon Source, DND CAT Synchrotron Res Ctr, Argonne, IL 60439 USA.
RP Egli, M (reprint author), Vanderbilt Univ, Dept Biochem, Sch Med, Nashville, TN 37232 USA.
EM martin.egli@vanderbilt.edu
OI Leumann, Christian/0000-0002-7996-7083
FU NIGMS NIH HHS [GM 55237]
NR 31
TC 21
Z9 21
U1 1
U2 4
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1359-7345
EI 1364-548X
J9 CHEM COMMUN
JI Chem. Commun.
PY 2008
IS 7
BP 883
EP 885
DI 10.1039/b716390h
PG 3
WC Chemistry, Multidisciplinary
SC Chemistry
GA 259SE
UT WOS:000252958700025
PM 18253536
ER
PT J
AU Fan, HY
AF Fan, Hongyou
TI Nanocrystal-micelle: synthesis, self-assembly and application
SO CHEMICAL COMMUNICATIONS
LA English
DT Article
ID SEMICONDUCTOR QUANTUM DOTS; IN-SITU FORMATION; GOLD NANOPARTICLES;
MESOPOROUS SILICA; THIN-FILMS; MAGNETIC NANOPARTICLES; FEPT
NANOPARTICLES; SCALING BEHAVIOR; BLOCK-COPOLYMERS; ROOM-TEMPERATURE
AB Nanocrystals (NCs) are one of the important building blocks for fabrication of nanostructured arrays for wide range of optical, electronic, magnetic, catalytic and biosensing applications. Here, our recent advances in the synthesis, self-assembly and application of NC-micelles are highlighted. The NCs are encapsulated inside the core of surfactant micelles in a rapid, interfacially driven micro-emulsion process. The flexible surface chemistry of the NC-micelles causes them to be water-soluble and allows further self-assembly into two- and three-dimensional ordered arrays. The NC-micelles are biocompatible, of interest for bio-labeling. Finally, integration of the ordered arrays and charge transport property are discussed.
C1 [Fan, Hongyou] Sandia Natl Labs, Adv Mat Lab, Albuquerque, NM 87106 USA.
[Fan, Hongyou] Univ New Mexico, NSF Ctr Microengineered Mat, Dept Chem & Nucl Engn, Albuquerque, NM 87131 USA.
RP Fan, HY (reprint author), Sandia Natl Labs, Adv Mat Lab, 1001 Univ Blvd SE, Albuquerque, NM 87106 USA.
EM hfan@sandia.gov
NR 84
TC 47
Z9 47
U1 4
U2 38
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1359-7345
J9 CHEM COMMUN
JI Chem. Commun.
PY 2008
IS 12
BP 1383
EP 1394
DI 10.1039/b711251n
PG 12
WC Chemistry, Multidisciplinary
SC Chemistry
GA 274DZ
UT WOS:000253983300001
PM 18338033
ER
PT J
AU Gandon, V
Aubert, C
Malacria, M
Vollhardt, KPC
AF Gandon, Vincent
Aubert, Corinne
Malacria, Max
Vollhardt, K. Peter C.
TI Cobalt-mediated regio- and stereoselective assembly of dienamides by
hydroaminative alkyne coupling of alpha,omega-diynes
SO CHEMICAL COMMUNICATIONS
LA English
DT Article
ID DIELS-ALDER REACTIONS; 2+2+2 CYCLOADDITION REACTIONS; N-H ACTIVATION;
C-H; PYRAZINONES; ENAMIDES; ALKENES
AB In the presence of CpCo(C(2)H(4))(2), alpha,omega-diynes undergo hydro-aminative coupling with amides to furnish new dienamides with control of regio- and stereochemistry.
C1 [Gandon, Vincent; Vollhardt, K. Peter C.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
[Gandon, Vincent; Vollhardt, K. Peter C.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA.
[Gandon, Vincent; Aubert, Corinne; Malacria, Max] Univ Paris 06, Inst Chim Mol FR2769, Chim Organ Lab, UMR 7611, F-75252 Paris, France.
RP Vollhardt, KPC (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
EM kpcv@berkeley.edu
RI Gandon, Vincent/C-1942-2014
OI Gandon, Vincent/0000-0003-1108-9410
NR 28
TC 16
Z9 16
U1 1
U2 4
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1359-7345
J9 CHEM COMMUN
JI Chem. Commun.
PY 2008
IS 13
BP 1599
EP 1601
DI 10.1039/b716841a
PG 3
WC Chemistry, Multidisciplinary
SC Chemistry
GA 277DU
UT WOS:000254193700025
PM 18354812
ER
PT J
AU Scott, BL
McCleskey, TM
Chaudhary, A
Hong-Geller, E
Gnanakaran, S
AF Scott, Brian L.
McCleskey, T. Mark
Chaudhary, Anu
Hong-Geller, Elizabeth
Gnanakaran, S.
TI The bioinorganic chemistry and associated immunology of chronic
beryllium disease
SO CHEMICAL COMMUNICATIONS
LA English
DT Article
ID NECROSIS-FACTOR-ALPHA; ALUMINUM CITRATE; AQUEOUS-SOLUTION; LUNG-DISEASE;
T-CELLS; LYMPHOCYTE-PROLIFERATION; COORDINATION CHEMISTRY; ALVEOLAR
MACROPHAGES; FIBROBLAST GROWTH; SARCOIDOSIS
AB Chronic beryllium disease (CBD) is a debilitating, incurable, and often fatal disease that is caused by the inhalation of beryllium particulates. The growing use of beryllium in the modern world, in products ranging from computers to dental prosthetics (390 tons of beryllium in the US in the year 2000) necessitates a molecular based understanding of the disease in order to prevent and cure CBD. We have investigated the molecular basis of CBD at Los Alamos National Laboratory during the past six years, employing a multidisciplinary approach of bioinorganic chemistry and immunology. The results of this work, including speciation, inhalation and dissolution, and immunology will be discussed.
C1 [Scott, Brian L.; McCleskey, T. Mark] Los Alamos Natl Lab, Mat Phys & Applicat Div, Los Alamos, NM 87544 USA.
[Chaudhary, Anu; Hong-Geller, Elizabeth] Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA.
[Gnanakaran, S.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Scott, BL (reprint author), Los Alamos Natl Lab, Mat Phys & Applicat Div, POB 1663, Los Alamos, NM 87544 USA.
EM bscott@lanl.gov; tmark@lanl.gov; anu@lanl.gov; ehong@lanl.gov;
gnana@lanl.gov
RI McCleskey, Thomas/J-4772-2012; Scott, Brian/D-8995-2017;
OI Scott, Brian/0000-0003-0468-5396; Gnanakaran, S/0000-0002-9368-3044;
Mccleskey, Thomas/0000-0003-3750-3245
FU NIGMS NIH HHS [R01 GM076570]
NR 73
TC 29
Z9 30
U1 0
U2 6
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1359-7345
J9 CHEM COMMUN
JI Chem. Commun.
PY 2008
IS 25
BP 2837
EP 2847
DI 10.1039/b718746g
PG 11
WC Chemistry, Multidisciplinary
SC Chemistry
GA 316BS
UT WOS:000256924500001
PM 18566702
ER
PT J
AU Johnson, JA
Baskin, JM
Bertozzi, CR
Koberstein, JT
Turro, NJ
AF Johnson, Jeremiah A.
Baskin, Jeremy M.
Bertozzi, Carolyn R.
Koberstein, Jeffrey T.
Turro, Nicholas J.
TI Copper-free click chemistry for the in situ crosslinking of
photodegradable star polymers
SO CHEMICAL COMMUNICATIONS
LA English
DT Article
ID 1,3-DIPOLAR CYCLOADDITIONS; TERMINAL ALKYNES; LIVING SYSTEMS; MODEL
NETWORKS; AZIDES; HYDROGELS; LIGATION; ATRP
AB Bifunctional,fluorinated cyclooctynes were used for the in situ "click'' crosslinking of azide-terminated photodegradable star polymers, yielding photodegradable polymeric model networks with well-defined structures and tunable gelation times.
C1 [Johnson, Jeremiah A.; Turro, Nicholas J.] Columbia Univ, Dept Chem, New York, NY 10027 USA.
[Baskin, Jeremy M.; Bertozzi, Carolyn R.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
[Baskin, Jeremy M.; Bertozzi, Carolyn R.] Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720 USA.
[Baskin, Jeremy M.; Bertozzi, Carolyn R.] Univ Calif Berkeley, Howard Hughes Med Inst, Berkeley, CA 94720 USA.
[Bertozzi, Carolyn R.] Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.
[Koberstein, Jeffrey T.; Turro, Nicholas J.] Columbia Univ, Dept Chem Engn, New York, NY 10027 USA.
RP Turro, NJ (reprint author), Columbia Univ, Dept Chem, 3000 Broadway,MC3157, New York, NY 10027 USA.
EM njt3@columbia.edu
RI Johnson, Jeremiah/A-8403-2016;
OI Johnson, Jeremiah/0000-0001-9157-6491; Baskin,
Jeremy/0000-0003-2939-3138
FU NIGMS NIH HHS [GM058867, R01 GM058867, R01 GM058867-11, R37 GM058867]
NR 21
TC 111
Z9 111
U1 3
U2 47
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1359-7345
J9 CHEM COMMUN
JI Chem. Commun.
PY 2008
IS 26
BP 3064
EP 3066
DI 10.1039/b803043j
PG 3
WC Chemistry, Multidisciplinary
SC Chemistry
GA 320LS
UT WOS:000257236600029
PM 18688349
ER
PT J
AU Wu, ZL
Zhou, SH
Zhu, HG
Dai, S
Overbury, SH
AF Wu, Zili
Zhou, Shenghu
Zhu, Haoguo
Dai, Sheng
Overbury, Steven H.
TI Oxygen-assisted reduction of Au species on Au/SiO(2) catalyst in room
temperature CO oxidation
SO CHEMICAL COMMUNICATIONS
LA English
DT Article
ID CARBON-MONOXIDE; GOLD CATALYSTS; SUPPORTED GOLD; AU/TIO2; FTIR;
ADSORPTION; CLUSTERS; TIO2; AU/GAMMA-AL2O3; SIZE
AB An unexpected oxygen-assisted reduction of cationic Au species by CO was found on a Au/SiO(2) catalyst at room temperature and the produced metallic Au species plays an essential role in CO oxidation on Au/SiO(2).
C1 [Overbury, Steven H.] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
RP Overbury, SH (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
EM overburysh@ornl.gov
RI Wu, Zili/F-5905-2012; Overbury, Steven/C-5108-2016; Dai,
Sheng/K-8411-2015
OI Wu, Zili/0000-0002-4468-3240; Overbury, Steven/0000-0002-5137-3961; Dai,
Sheng/0000-0002-8046-3931
NR 30
TC 29
Z9 29
U1 4
U2 31
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1359-7345
J9 CHEM COMMUN
JI Chem. Commun.
PY 2008
IS 28
BP 3308
EP 3310
DI 10.1039/b803834a
PG 3
WC Chemistry, Multidisciplinary
SC Chemistry
GA 324XM
UT WOS:000257552700025
PM 18622453
ER
PT J
AU Fang, XK
Kogerler, P
AF Fang, Xikui
Koegerler, Paul
TI A polyoxometalate-based manganese carboxylate cluster
SO CHEMICAL COMMUNICATIONS
LA English
DT Article
ID SINGLE-MOLECULE MAGNETS; METAL-LANTHANIDE COMPLEXES; HIGH-SPIN
MOLECULES; OXIDATION-STATES; POLYOXOANIONS; CATALYSIS; SURFACES;
ELEMENTS
AB The functionalization of a pre-formed, high oxidation state {(CeMn6IV)-Mn-IV} cluster with a lacunary phosphotungstate, [alpha-P2W15O56](12-), exemplifies a straightforward route for grafting redox-active building blocks to existing Mn-carboxylate clusters and modeling their deposition onto metal oxide surfaces.
C1 [Fang, Xikui; Koegerler, Paul] Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
[Koegerler, Paul] Rhein Westfal TH Aachen, Inst Inorgan Chem, D-52074 Aachen, Germany.
RP Kogerler, P (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
EM kogerler@ameslab.gov
RI Kogerler, Paul/H-5866-2013
OI Kogerler, Paul/0000-0001-7831-3953
NR 33
TC 87
Z9 87
U1 2
U2 18
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1359-7345
EI 1364-548X
J9 CHEM COMMUN
JI Chem. Commun.
PY 2008
IS 29
BP 3396
EP 3398
DI 10.1039/b804111c
PG 3
WC Chemistry, Multidisciplinary
SC Chemistry
GA 327IL
UT WOS:000257722700013
PM 18633501
ER
PT J
AU Yin, HF
Wang, C
Zhu, HG
Overbury, SH
Sun, SH
Dai, S
AF Yin, Hongfeng
Wang, Chao
Zhu, Haoguo
Overbury, Steven H.
Sun, Shouheng
Dai, Sheng
TI Colloidal deposition synthesis of supported gold nanocatalysts based on
Au-Fe3O4 dumbbell nanoparticles
SO CHEMICAL COMMUNICATIONS
LA English
DT Article
ID TEMPERATURE CO OXIDATION; AU CATALYSTS; TITANIA; SILICA; TIO2
AB Highly active Au catalysts with a dumbbell-like heterostructure for CO oxidation were prepared through colloidal deposition method: both activities and stabilities were investigated under different experimental conditions.
C1 [Wang, Chao; Sun, Shouheng] Brown Univ, Dept Chem, Providence, RI 02912 USA.
[Yin, Hongfeng; Zhu, Haoguo; Overbury, Steven H.; Dai, Sheng] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
RP Sun, SH (reprint author), Brown Univ, Dept Chem, Providence, RI 02912 USA.
EM ssun@brown.edu; dais@ornl.gov
RI Wang, Chao/F-4558-2012; Overbury, Steven/C-5108-2016; Dai,
Sheng/K-8411-2015
OI Wang, Chao/0000-0001-7398-2090; Overbury, Steven/0000-0002-5137-3961;
Dai, Sheng/0000-0002-8046-3931
FU Office of Basic Energy Sciences; US Department of Energy; US DOE
[DE-AC05-00OR22725]; NSF/DMR [0606264]
FX The work at ORNL was supported by the Office of Basic Energy Sciences,
US Department of Energy. The Oak Ridge National Laboratory is managed by
UT-Battelle. LLC for the US DOE under contract DE-AC05-00OR22725. This
research was supported in part by the appointment for H. Yin to the ORNL
Research Associates Program. administered jointly by ORNL and the Oak
Ridge Associated Universities. The work at Brown was supported by
NSF/DMR 0606264.
NR 24
TC 73
Z9 74
U1 9
U2 103
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1359-7345
EI 1364-548X
J9 CHEM COMMUN
JI Chem. Commun.
PY 2008
IS 36
BP 4357
EP 4359
DI 10.1039/b807591c
PG 3
WC Chemistry, Multidisciplinary
SC Chemistry
GA 350VG
UT WOS:000259381100035
PM 18802569
ER
PT J
AU Spencer, LP
Gdula, RL
Hayton, TW
Scott, BL
Boncella, JM
AF Spencer, Liam P.
Gdula, Robyn L.
Hayton, Trevor W.
Scott, Brian L.
Boncella, James M.
TI Synthesis and reactivity of bis(imido) uranium(VI) cyclopentadienyl
complexes
SO CHEMICAL COMMUNICATIONS
LA English
DT Article
ID F-BLOCK METALS; CRYSTAL-STRUCTURE; IMIDO ANALOGS; URANYL-ION; CATALYSIS;
CHEMISTRY; CHLORIDE
AB The bis(imido) uranium(VI)-C(5)H(5) and -C(5)Me(5) complexes (C(5)H(5))(2)U(N(t)Bu)(2), (C(5)Me(5))(2)U(N(t)Bu)(2), (C(5)H(5))U(N(t)Bu)(2)(I)-(dmpe), and (C(5)H(5))(2)U(N(t)Bu)(2)(dmpe) can be synthesized from reactions between U(N(t)Bu)(2)(I)(2)(L)(x) (L = THF, x = 2; L = dmpe, x = 1) and Na(C(5)R(5)) (R = H, Me); these complexes represent the first structurally characterized C(5)H(5)-compounds of uranium(VI) and they further highlight the differences between UO(2)(2+) and the bis(imido) fragment.
C1 [Spencer, Liam P.; Gdula, Robyn L.; Scott, Brian L.; Boncella, James M.] Los Alamos Natl Lab, Mat Phys & Applicat Div, Los Alamos, NM 87545 USA.
[Hayton, Trevor W.] Univ Calif Santa Barbara, Dept Chem & Biochem, Santa Barbara, CA 93106 USA.
RP Spencer, LP (reprint author), Los Alamos Natl Lab, Mat Phys & Applicat Div, Los Alamos, NM 87545 USA.
EM boncella@lanl.gov
RI Scott, Brian/D-8995-2017;
OI Scott, Brian/0000-0003-0468-5396; Boncella, James/0000-0001-8393-392X
FU Seaborg Institute; Division of Chemical Sciences; Office of Basic Energy
Sciences; US Department of Energy
FX LPS, RLG, and TWH thank the Seaborg Institute for their post-doctoral
fellowships. This work was also partially supported by the Division of
Chemical Sciences, Office of Basic Energy Sciences, US Department of
Energy under the Heavy Element Chemistry Program at LANL.
NR 19
TC 36
Z9 36
U1 2
U2 13
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1359-7345
J9 CHEM COMMUN
JI Chem. Commun.
PY 2008
IS 40
BP 4986
EP 4988
DI 10.1039/b806075d
PG 3
WC Chemistry, Multidisciplinary
SC Chemistry
GA 365MP
UT WOS:000260411000037
PM 18931761
ER
PT J
AU Lei, CH
Hu, DH
Ackerman, EJ
AF Lei, Chenghong
Hu, Dehong
Ackerman, Eric J.
TI Single-molecule fluorescence spectroelectrochemistry of cresyl violet
SO CHEMICAL COMMUNICATIONS
LA English
DT Article
ID INTERFACIAL ELECTRON-TRANSFER; HORSERADISH-PEROXIDASE; TRANSFER
DYNAMICS; SPECTROSCOPY; SYSTEMS
AB Here we report a new path to study single molecule electron transfer dynamics by coupling scanning fluorescence microscopy with a potentiostat via a conventional electrochemical cell to enable single-molecule fluorescence spectroelectrochemistry of cresyl violet in aqueous solution, demonstrating that the single-molecule fluorescence intensity of cresyl violet is modulated synchronously with the cyclic voltammetric potential scanning.
C1 [Lei, Chenghong; Hu, Dehong; Ackerman, Eric J.] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Ackerman, EJ (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA.
EM Chenghong.Lei@pnl.gov; Dehong.Hu@pnl.gov; Eric.Ackerman@pnl.gov
RI Hu, Dehong/B-4650-2010
OI Hu, Dehong/0000-0002-3974-2963
NR 20
TC 41
Z9 41
U1 4
U2 31
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1359-7345
J9 CHEM COMMUN
JI Chem. Commun.
PY 2008
IS 43
BP 5490
EP 5492
DI 10.1039/b812161c
PG 3
WC Chemistry, Multidisciplinary
SC Chemistry
GA 370PR
UT WOS:000260775000003
PM 18997928
ER
PT J
AU Carter, TG
Yantasee, W
Sangvanich, T
Fryxell, GE
Johnson, DW
Addleman, RS
AF Carter, Timothy G.
Yantasee, Wassana
Sangvanich, Thanapon
Fryxell, Glen E.
Johnson, Darren W.
Addleman, R. Shane
TI New functional materials for heavy metal sorption: "Supramolecular''
attachment of thiols to mesoporous silica substrates
SO CHEMICAL COMMUNICATIONS
LA English
DT Article
ID SELF-ASSEMBLED MONOLAYERS; SUPPORTS SAMMS; NANOPARTICLES; EXTRACTION;
SEPARATION; CHEMISTRY; MECHANISM; REMOVAL; DESIGN; FAMILY
AB A new class of sorbent material, which exhibits exceptional metal capture from contaminated natural water, features aromatic thiol ligands reversibly bound to functionalized mesoporous silica through non-covalent interactions and have the potential of being regenerable.
C1 [Carter, Timothy G.; Johnson, Darren W.] Univ Oregon, Dept Chem, Eugene, OR 97403 USA.
[Carter, Timothy G.; Johnson, Darren W.] Univ Oregon, Inst Mat Sci, Eugene, OR 97403 USA.
[Carter, Timothy G.; Johnson, Darren W.] Univ Oregon, ONAMI, Eugene, OR 97403 USA.
[Yantasee, Wassana; Sangvanich, Thanapon; Fryxell, Glen E.; Addleman, R. Shane] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Johnson, DW (reprint author), Univ Oregon, Dept Chem, Eugene, OR 97403 USA.
EM dwj@uoregon.edu; raymond.addleman@pnl.gov
FU University of Oregon [CHE-0545206]; NIEHS [1R21ES015620-01A1]; National
Science Foundation (NSF) [DGE-0549503]
FX Support from the University of Oregon, an NSF-CAREER award (CHE-0545206)
and NIEHS (grant #1R21ES015620-01A1) are gratefully acknowledged. D.W.J
is a Cottrell Scholar of Research Corporation. T. G. C. acknowledges the
National Science Foundation (NSF) for an Integrative Graduate Education
and Research Traineeship (No DGE-0549503) and Dr Ngoc Nguyen of the
University of Oregon for assistance with the PXRD data collection.
NR 25
TC 26
Z9 27
U1 0
U2 12
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1359-7345
J9 CHEM COMMUN
JI Chem. Commun.
PY 2008
IS 43
BP 5583
EP 5585
DI 10.1039/b810576f
PG 3
WC Chemistry, Multidisciplinary
SC Chemistry
GA 370PR
UT WOS:000260775000034
PM 18997959
ER
PT J
AU Xiong, ZT
Chua, YS
Wu, GT
Xu, WL
Chen, P
Shaw, W
Karkamkar, A
Linehan, J
Smurthwaite, T
Autrey, T
AF Xiong, Zhitao
Chua, Yong Shen
Wu, Guotao
Xu, Weiliang
Chen, Ping
Shaw, Wendy
Karkamkar, Abhi
Linehan, John
Smurthwaite, Tricia
Autrey, Thomas
TI Interaction of lithium hydride and ammonia borane in THF
SO CHEMICAL COMMUNICATIONS
LA English
DT Article
ID CHEMICAL HYDROGEN STORAGE; THERMAL-DECOMPOSITION; DEHYDROGENATION;
RELEASE; IMIDES
AB The two-step reaction between LiH and NH(3)BH(3) in THF leads to the production of more than 14 wt% of hydrogen at 40 degrees C.
C1 [Xiong, Zhitao; Wu, Guotao; Chen, Ping] Dalian Inst Chem Phys, Dalian 116023, Peoples R China.
[Xiong, Zhitao; Chen, Ping] Natl Univ Singapore, Dept Phys, Singapore 117542, Singapore.
[Chua, Yong Shen; Xu, Weiliang; Chen, Ping] Natl Univ Singapore, Dept Chem, Singapore 117542, Singapore.
[Shaw, Wendy; Karkamkar, Abhi; Linehan, John; Smurthwaite, Tricia; Autrey, Thomas] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Chen, P (reprint author), Dalian Inst Chem Phys, Dalian 116023, Peoples R China.
EM pchen@dicp.ac.cn; tom.autrey@pnl.gov
RI Chua, Yong Shen/J-3551-2016;
OI Yang, Shuman/0000-0002-9638-0890; Chua, Yong Shen/0000-0002-9207-5776
FU Dalian Institute of Chemical Physics, China; National University of
Singapore; U.S. DOE CoE in Chemical Hydrogen Storage
FX The authors wish to acknowledge supports from the Dalian Institute of
Chemical Physics, China, the National University of Singapore,
Singapore, and the U.S. DOE CoE in Chemical Hydrogen Storage. This work
was performed as a collaboration established by the IPHE project
"Combination of Amine Boranes with MgH2 & LiNH2
for High Capacity Reversible Hydrogen Storage.'' A portion of the
research described in this paper was performed in the Environmental
Molecular Sciences Laboratory, a national scientific user facility
located at PNNL. PNNL is operated for the DOE by Battelle.
NR 21
TC 59
Z9 59
U1 0
U2 17
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1359-7345
J9 CHEM COMMUN
JI Chem. Commun.
PY 2008
IS 43
BP 5595
EP 5597
DI 10.1039/b812576g
PG 3
WC Chemistry, Multidisciplinary
SC Chemistry
GA 370PR
UT WOS:000260775000038
PM 18997963
ER
PT J
AU Zou, GF
Jain, M
Zhou, HH
Luo, HM
Baily, SA
Civale, L
Bauer, E
McCleskey, TM
Burrell, AK
Jia, QX
AF Zou, Guifu
Jain, Menka
Zhou, Honghui
Luo, Hongmei
Baily, Scott A.
Civale, Leonardo
Bauer, Eve
McCleskey, T. Mark
Burrell, Anthony K.
Jia, Quanxi
TI Ultrathin epitaxial superconducting niobium nitride films grown by a
chemical solution technique
SO CHEMICAL COMMUNICATIONS
LA English
DT Article
ID POLYMER-ASSISTED DEPOSITION; SINGLE-CRYSTAL; SIS MIXERS; NBN; JUNCTIONS
AB Ultrathin epitaxial superconducting NbN (18 nm) films, exhibiting a superconducting transition temperature of 14 K and a critical current density as high as 5.2 MA cm(-2) at 5 K under zero magnetic field, were grown on SrTiO(3) (STO) by a chemical solution technique, polymer assisted deposition (PAD).
C1 [Zou, Guifu; Jain, Menka; Zhou, Honghui; Luo, Hongmei; Baily, Scott A.; Civale, Leonardo; Bauer, Eve; McCleskey, T. Mark; Burrell, Anthony K.; Jia, Quanxi] Los Alamos Natl Lab, Mat Phys & Applicat Div, Los Alamos, NM 87545 USA.
RP Zou, GF (reprint author), Los Alamos Natl Lab, Mat Phys & Applicat Div, POB 1663, Los Alamos, NM 87545 USA.
EM gfzou@lanl.gov; qxjia@lanl.gov
RI ZOU, GUIFU/C-8498-2011; McCleskey, Thomas/J-4772-2012; Jia, Q.
X./C-5194-2008;
OI Jain, Menka/0000-0002-2264-6895; Civale, Leonardo/0000-0003-0806-3113;
Mccleskey, Thomas/0000-0003-3750-3245
FU U. S. Department of Energy (DOE)
FX We gratefully acknowledge the support of the U. S. Department of Energy
(DOE) through the LANL/LDRD Program and the DOE EE-RE Solid State
Lighting Program.
NR 12
TC 17
Z9 17
U1 2
U2 19
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1359-7345
J9 CHEM COMMUN
JI Chem. Commun.
PY 2008
IS 45
BP 6022
EP 6024
DI 10.1039/b815066d
PG 3
WC Chemistry, Multidisciplinary
SC Chemistry
GA 376GB
UT WOS:000261171000041
PM 19030573
ER
PT J
AU Liang, Y
Guo, P
Pingali, SV
Pabit, S
Thiyagarajan, P
Berland, KM
Lynn, DG
AF Liang, Yan
Guo, Peng
Pingali, Sai Venkatesh
Pabit, Suzette
Thiyagarajan, Pappannan
Berland, Keith M.
Lynn, David G.
TI Light harvesting antenna on an amyloid scaffold
SO CHEMICAL COMMUNICATIONS
LA English
DT Article
ID RESONANCE ENERGY-TRANSFER; PHOTOSYNTHETIC REACTION CENTERS;
RHODOBACTER-SPHAEROIDES; SELF-ORGANIZATION; PROTEIN; MEMBRANE; FIBRILS;
PEPTIDE; COMPLEX; ASSEMBLIES
AB A pigment array has been constructed within a paracrystalline amyloid nanotube and Forster energy transfer along the nanotube surface has been demonstrated to self-assembled acceptor dyes.
C1 [Pingali, Sai Venkatesh; Thiyagarajan, Pappannan] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
[Liang, Yan; Lynn, David G.] Emory Univ, Dept Chem, Ctr Fundamental & Appl Mol Evolut, Emory Ctr BioInspired Renewable Energy, Atlanta, GA 30322 USA.
[Liang, Yan; Lynn, David G.] Emory Univ, Dept Biol, Ctr Fundamental & Appl Mol Evolut, Emory Ctr BioInspired Renewable Energy, Atlanta, GA 30322 USA.
[Guo, Peng; Pabit, Suzette; Berland, Keith M.] Emory Univ, Dept Phys, Atlanta, GA 30322 USA.
RP Thiyagarajan, P (reprint author), Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
EM dlynn2@emory.edu
RI Guo, Peng/E-9858-2015;
OI Pingali, Sai Venkatesh/0000-0001-7961-4176
FU Apkarian Microscopy Center; APS [DE-AC02-06CH11357]; DOE [ER15377]; NSF
[CRC-CHE-0404677, CBC-CHE-0739189]
FX The work benefited from the Apkarian Microscopy Center at EU, assistance
from Dr Soenke Seifert at the APS under contract number
DE-AC02-06CH11357 between UChicago Argonne, LLC and the Department of
Energy, support from DOE (ER15377), NSF (CRC-CHE-0404677), and NSF
(CBC-CHE-0739189), and for CD instrumentation from NSF (CHE-0131013).
NR 33
TC 17
Z9 17
U1 1
U2 14
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1359-7345
J9 CHEM COMMUN
JI Chem. Commun.
PY 2008
IS 48
BP 6522
EP 6524
DI 10.1039/b814262a
PG 3
WC Chemistry, Multidisciplinary
SC Chemistry
GA 384KA
UT WOS:000261742500014
PM 19057766
ER
PT J
AU Pons, V
Baker, RT
Szymczak, NK
Heldebrant, DJ
Linehan, JC
Matus, MH
Grant, DJ
Dixon, DA
AF Pons, Vincent
Baker, R. Tom
Szymczak, Nathaniel K.
Heldebrant, David J.
Linehan, John C.
Matus, Myrna H.
Grant, Daniel J.
Dixon, David A.
TI Coordination of aminoborane, NH2BH2, dictates selectivity and extent of
H-2 release in metal-catalysed ammonia borane dehydrogenation
SO CHEMICAL COMMUNICATIONS
LA English
DT Article
ID THERMAL-DECOMPOSITION; HYDROGEN STORAGE
AB In situ B-11 NMR monitoring, computational modeling, and external trapping studies show that selectivity and extent of H-2 release in metal-catalysed dehydrogenation of ammonia borane, NH3BH3, are determined by coordination of reactive aminoborane, NH2BH2, to the metal center.
C1 [Pons, Vincent; Baker, R. Tom] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Szymczak, Nathaniel K.; Heldebrant, David J.; Linehan, John C.] Pacific NW Natl Lab, Fundamental Sci Directorate, Richland, WA 99354 USA.
[Matus, Myrna H.; Grant, Daniel J.; Dixon, David A.] Univ Alabama, Dept Chem, Tuscaloosa, AL 35487 USA.
RP Baker, RT (reprint author), Univ Ottawa, Dept Chem, Ottawa, ON K1N 6N5, Canada.
EM rbaker@uottawa.ca
NR 27
TC 115
Z9 116
U1 3
U2 37
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1359-7345
J9 CHEM COMMUN
JI Chem. Commun.
PY 2008
IS 48
BP 6597
EP 6599
DI 10.1039/b809190k
PG 3
WC Chemistry, Multidisciplinary
SC Chemistry
GA 384KA
UT WOS:000261742500039
PM 19057791
ER
PT J
AU Kitchin, JR
Miller, SD
Sholl, DS
AF Kitchin, John R.
Miller, Spencer D.
Sholl, David S.
BE Hinchliffe, A
TI Density functional theory studies of alloys in heterogeneous catalysis
SO CHEMICAL MODELLING: APPLICATIONS AND THEORY, VOL 5: A REVIEW OF THE
LITERATURE PUBLISHED BETWEEN JUNE 2005 AND MAY 2007
SE Chemical Modelling Applications and Theory-Specialist Periodical Report
LA English
DT Article; Book Chapter
ID BIMETALLIC RHCU(111) SURFACES; POLAR SEMICONDUCTOR SURFACES; 1ST
PRINCIPLES ANALYSIS; AB-INITIO METHODS; OXYGEN REDUCTION; CO OXIDATION;
HYDROGEN EVOLUTION; PHASE-TRANSITIONS; MGO(100) SURFACE; 1ST-PRINCIPLES
CALCULATIONS
C1 [Kitchin, John R.; Miller, Spencer D.; Sholl, David S.] Carnegie Mellon Univ, Dept Chem Engn, Pittsburgh, PA 15213 USA.
[Kitchin, John R.; Sholl, David S.] Natl Energy Technol Lab, Pittsburgh, PA 15236 USA.
RP Kitchin, JR (reprint author), Carnegie Mellon Univ, Dept Chem Engn, Pittsburgh, PA 15213 USA.
EM jkitchin@andrew.cmu.edu
OI Kitchin, John/0000-0003-2625-9232
NR 138
TC 3
Z9 3
U1 1
U2 4
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, CAMBRIDGE CB4 4WF, CAMBS, ENGLAND
BN 978-1-84755-889-3
J9 CHEM MODEL APPL THEO
PY 2008
VL 5
BP 150
EP 181
DI 10.1039/b608782p
D2 10.1039/9781847558893
PG 32
WC Chemistry, Physical; Computer Science, Interdisciplinary Applications;
Mathematics, Applied
SC Chemistry; Computer Science; Mathematics
GA BKZ69
UT WOS:000269696400005
ER
PT J
AU Kauffman, DR
Star, A
AF Kauffman, Douglas R.
Star, Alexander
TI Electronically monitoring biological interactions with carbon nanotube
field-effect transistors
SO CHEMICAL SOCIETY REVIEWS
LA English
DT Review
ID MASS-SPECTROMETRY; DNA ANALYSIS; SINGLE; BIOSENSORS; DEVICES;
FUNCTIONALIZATION; PERFORMANCE; ADSORPTION; MECHANISM; PROTEINS
AB The year 2008 marks the 10th anniversary of the carbon nanotube field-effect transistor (NTFET). In the past decade a vast amount of effort has been placed on the development of NTFET based sensors for the detection of both chemical and biological species. Towards this end, NTFETs show great promise because of their extreme environmental sensitivity, small size, and ultra-low power requirements. Despite the great progress NTFETs have shown in the field of biological sensing, debate still exists over the mechanistic origins underlying the electronic response of NTFET devices, specifically whether analyte species interact with the carbon nanotube conduction channel or if interaction with the NTFET electrodes actually triggers device response. In this tutorial review, we describe the fabrication of NTFET devices, and detail several reports that illustrate recent advances in biological detection using NTFET devices, while highlighting the suggested mechanisms explaining the device response to analyte species. In doing this we hope to show that NTFET technology has the potential for low-cost and portable bioanalytical platforms.
C1 [Kauffman, Douglas R.; Star, Alexander] Univ Pittsburgh, Dept Chem, Pittsburgh, PA 15260 USA.
[Kauffman, Douglas R.; Star, Alexander] Natl Energy Technol Lab, Pittsburgh, PA 15236 USA.
RP Star, A (reprint author), Univ Pittsburgh, Dept Chem, Pittsburgh, PA 15260 USA.
EM astar@pitt.edu
RI Star, Alexander/C-3399-2013;
OI Kauffman, Douglas/0000-0002-7855-3428
NR 51
TC 117
Z9 117
U1 2
U2 40
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 0306-0012
J9 CHEM SOC REV
JI Chem. Soc. Rev.
PY 2008
VL 37
IS 6
BP 1197
EP 1206
DI 10.1039/b709567h
PG 10
WC Chemistry, Multidisciplinary
SC Chemistry
GA 304NA
UT WOS:000256115000011
PM 18497932
ER
PT J
AU Allendorf, MD
Besmann, TM
Kee, RJ
Swihart, MT
AF Allendorf, Mark D.
Besmann, Theodore. M.
Kee, Robert J.
Swihart, Mark T.
BE Jones, AC
Hitchman, ML
TI Modeling CVD Processes
SO CHEMICAL VAPOUR DEPOSITION: PRECURSORS, PROCESSES AND APPLICATIONS
LA English
DT Article; Book Chapter
ID CHEMICAL-VAPOR-DEPOSITION; DENSITY-FUNCTIONAL THEORY; AB-INITIO
CALCULATIONS; CL-H SYSTEM; DISCRETIZED POPULATION BALANCE; SILICON
NANOPARTICLE FORMATION; SINTERABLE CERAMIC POWDERS; SURFACE-REACTION
MECHANISM; TOTAL-ENERGY CALCULATIONS; ATOMIC LAYER DEPOSITION
C1 [Allendorf, Mark D.] Sandia Natl Labs, Livermore, CA 94551 USA.
[Besmann, Theodore. M.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Kee, Robert J.] Colorado Sch Mines, Div Engn, Golden, CO 80401 USA.
[Swihart, Mark T.] SUNY Buffalo, Dept Biol & Chem Engn, Buffalo, NY 14260 USA.
RP Allendorf, MD (reprint author), Sandia Natl Labs, POB 969 MS 9291, Livermore, CA 94551 USA.
RI Swihart, Mark/A-3182-2008
OI Swihart, Mark/0000-0002-9652-687X
NR 225
TC 1
Z9 1
U1 0
U2 8
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, CAMBRIDGE CB4 4WF, CAMBS, ENGLAND
BN 978-1-84755-879-4
PY 2008
BP 93
EP 157
DI 10.1039/9781847558794-00093
D2 10.1039/9781847558794
PG 65
WC Chemistry, Applied; Materials Science, Multidisciplinary
SC Chemistry; Materials Science
GA BKZ43
UT WOS:000269685700004
ER
PT J
AU Carlson, CN
Veauthier, JM
John, KD
Morris, DE
AF Carlson, Christin N.
Veauthier, Jacqueline M.
John, Kevin D.
Morris, David E.
TI Electronic and magnetic properties of bimetallic ytterbocene complexes:
The impact of bridging ligand geometry
SO CHEMISTRY-A EUROPEAN JOURNAL
LA English
DT Article
DE magnetic properties; metallocenes; UV/Vis spectroscopy; ytterbium
ID MOLECULAR WIRES; 2,3,5,6-TETRA(2-PYRIDYL)PYRAZINE TPPZ;
ANTIFERROMAGNETIC EXCHANGE; COORDINATION CHEMISTRY; SUPPORTING
ELECTROLYTE; LANTHANIDE COMPLEXES; CRYSTAL-STRUCTURES; ENERGY-TRANSFER;
PYRAZINE TPPZ; MIXED-VALENCY
AB Bimetallic ytterbocene complexes with bridging N-heterocylic ligands have been studied extensively in recent years due to their potential applications ranging from molecular wires to single-molecule magnets. Herein, we review our recent results for a series of ytterbocene polypyridyl bimetallic complexes to highlight the versatility and tunability of these systems based on simple changes in bridging ligand geometry. Our work has involved structural, electrochemical, optical, and magnetic measurements with the goal of better understanding the electronic and magnetic communication between the two ytterbium metal centers in this new class of bimetallics.
C1 [Carlson, Christin N.; Veauthier, Jacqueline M.; John, Kevin D.; Morris, David E.] Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA.
RP John, KD (reprint author), Los Alamos Natl Lab, Div Chem, POB 1663, Los Alamos, NM 87545 USA.
EM kdjohn@lanl.gov; demorris@lanl.gov
RI Morris, David/A-8577-2012;
OI Veauthier, Jacqueline/0000-0003-2206-7786; John,
Kevin/0000-0002-6181-9330
NR 59
TC 17
Z9 17
U1 0
U2 6
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0947-6539
J9 CHEM-EUR J
JI Chem.-Eur. J.
PY 2008
VL 14
IS 2
BP 422
EP 431
DI 10.1002/chem.200700986
PG 10
WC Chemistry, Multidisciplinary
SC Chemistry
GA 252PE
UT WOS:000252457600002
PM 17924595
ER
PT J
AU Justus, E
Rischka, M
Wishart, JF
Werner, K
Gabel, D
AF Justus, Eugen
Rischka, Mans
Wishart, James F.
Werner, Kristina
Gabel, Detlef
TI Trialkylammoniododecaborates: Anions for ionic liquids with potassium,
lithium and protons as cations
SO CHEMISTRY-A EUROPEAN JOURNAL
LA English
DT Article
DE boranes; boron; conducting materials; ionic liquids; lithium; pulse
radiolysis
ID WEAKLY COORDINATING ANIONS; ROOM-TEMPERATURE; CARBORANE ANIONS; SALTS;
SOLVENTS; DERIVATIVES; CATALYSIS; CHEMISTRY; B10H10-2; BORANES
AB Herein we report a new class of low-melting ionic liquids (IL) that consist of N,N,N-trialkylammonioundecahydrododecaborates(1-) as the anion and a range of cations. The cations include the common cations of conventional ILs such as tetraalkylammonium, N-alkylpyridinium, and N-methyl-N ''-alkylimidazolium. In addition, their salts with lithium, potassium, and proton cations also exist as ILs. Pulse radiolysis studies indicate that the anions do not react with solvated electrons.
C1 [Justus, Eugen; Werner, Kristina; Gabel, Detlef] Univ Bremen, Dept Chem, D-28334 Bremen, Germany.
[Rischka, Mans] Fraunhofer Inst Mfg Engn, D-28359 Bremen, Germany.
[Rischka, Mans] Appl Mat Res IFAM, D-28359 Bremen, Germany.
[Wishart, James F.] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
RP Gabel, D (reprint author), Univ Bremen, Dept Chem, POB 330 440, D-28334 Bremen, Germany.
EM gabel@chemie.uni-bremen.de
RI Wishart, James/L-6303-2013
OI Wishart, James/0000-0002-0488-7636
NR 38
TC 32
Z9 32
U1 1
U2 21
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 0947-6539
J9 CHEM-EUR J
JI Chem.-Eur. J.
PY 2008
VL 14
IS 6
BP 1918
EP 1923
DI 10.1002/chem.200701427
PG 6
WC Chemistry, Multidisciplinary
SC Chemistry
GA 266XK
UT WOS:000253470900025
PM 18067114
ER
PT J
AU Berthoud, R
Baudouin, A
Fenet, B
Lukens, W
Pelzer, K
Basset, JM
Candy, JP
Coperet, C
AF Berthoud, Romain
Baudouin, Anne
Fenet, Bernard
Lukens, Wayne
Pelzer, Katrin
Basset, Jean-Marie
Candy, Jean-Pierre
Coperet, Christophe
TI Mononuclear ruthenium hydride species versus ruthenium nanoparticles:
The effect of silane functionalities on silica surfaces
SO CHEMISTRY-A EUROPEAN JOURNAL
LA English
DT Article
ID C-H BOND; ORGANOMETALLIC CHEMISTRY; HETEROGENEOUS CATALYSIS;
ORGANOSILANE FRAGMENTS; F-TEST; X-RAY; COMPLEXES; CRYSTAL; METAL;
ACTIVATION
C1 [Berthoud, Romain; Baudouin, Anne; Basset, Jean-Marie; Candy, Jean-Pierre; Coperet, Christophe] Univ Lyon, Inst Chim, C2P2 LCOMS ESCPE, F-69616 Villeurbanne, France.
[Fenet, Bernard] Univ Lyon 1, Ctr RMN, ESCPE, F-69616 Villeurbanne, France.
[Lukens, Wayne] Lawrence Berkeley Natl Lab, Div Chem Sci, Berkeley, CA 94720 USA.
[Pelzer, Katrin] Max Planck Soc, Fritz Haber Inst, Dept Inorgan Chem, D-14195 Berlin, Germany.
RP Berthoud, R (reprint author), Univ Lyon, Inst Chim, C2P2 LCOMS ESCPE, 43 Bd 11 Nov, F-69616 Villeurbanne, France.
EM coperet@cpe.fr
RI Baudouin, Anne/B-2228-2010;
OI basset, jean marie/0000-0003-3166-8882
NR 32
TC 13
Z9 13
U1 1
U2 12
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 0947-6539
J9 CHEM-EUR J
JI Chem.-Eur. J.
PY 2008
VL 14
IS 12
BP 3523
EP 3526
DI 10.1002/chem.200800174
PG 4
WC Chemistry, Multidisciplinary
SC Chemistry
GA 298QS
UT WOS:000255702800004
PM 18338411
ER
PT J
AU Martinson, ABF
Hamann, TW
Pellin, MJ
Hupp, JT
AF Martinson, Alex B. F.
Hamann, Thomas W.
Pellin, Michael J.
Hupp, Joseph T.
TI New architectures for dye-senstized solar cells
SO CHEMISTRY-A EUROPEAN JOURNAL
LA English
DT Article
DE atomic layer; charge dynamics; dyes/pigments; nanoparticles;
photovoltaic
ID INTERFACIAL ELECTRON-TRANSFER; NANOCRYSTALLINE TIO2; CHARGE-TRANSFER;
POLYPYRIDYL COMPLEXES; ENERGY CONVERSION; BLOCKING LAYERS; RATE
CONSTANTS; RECOMBINATION; TRANSPORT; SEMICONDUCTOR
AB Modern dye-sensitized solar cell (DSSC) technology was built upon nanoparticle wide bandgap semiconductor photoanodes. While versatile and robust, the sintered nanoparticle architecture exhibits exceedingly slow electron transport that ultimately restricts the diversity of feasible redox mediators. The small collection of suitable mediators limits both our understanding of an intriguing heterogeneous system and the performance of these promising devices. Recently, a number of pseudo-1D photoanodes that exhibit accelerated charge transport and greater materials flexibility were fabricated. The potential of these alternative photoanode architectures for advancing, both directly and indirectly, the performance of DSSCs is explored.
C1 [Martinson, Alex B. F.; Hamann, Thomas W.; Hupp, Joseph T.] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA.
[Martinson, Alex B. F.; Pellin, Michael J.] Argonne Natl Lab, Dept Mat Sci, Argonne, IL 60439 USA.
RP Hupp, JT (reprint author), Northwestern Univ, Dept Chem, 2145 Sheridan Rd, Evanston, IL 60208 USA.
EM j-hupp@northwestern.edu
RI Pellin, Michael/B-5897-2008; Hupp, Joseph/K-8844-2012;
OI Pellin, Michael/0000-0002-8149-9768; Hupp, Joseph/0000-0003-3982-9812;
Martinson, Alex/0000-0003-3916-1672
NR 58
TC 212
Z9 214
U1 1
U2 84
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 0947-6539
J9 CHEM-EUR J
JI Chem.-Eur. J.
PY 2008
VL 14
IS 15
BP 4458
EP 4467
DI 10.1002/chem.200701667
PG 10
WC Chemistry, Multidisciplinary
SC Chemistry
GA 306IO
UT WOS:000256241700001
PM 18366042
ER
PT J
AU Huang, JS
Sumpter, BG
Meunier, V
AF Huang, Jingsong
Sumpter, Bobby G.
Meunier, Vincent
TI A universal model for nanoporous carbon supercapacitors applicable to
diverse pore regimes, carbon materials, and electrolytes
SO CHEMISTRY-A EUROPEAN JOURNAL
LA English
DT Article
DE carbon; density functional calculations; electric double layer;
mesoporous materials; supercapacitors
ID DOUBLE-LAYER CAPACITANCE; CARBIDE-DERIVED CARBON; ELECTROCHEMICAL
CAPACITORS; ACTIVATED CARBONS; PROPYLENE CARBONATE; GAMMA-BUTYROLACTONE;
NANOTUBE ELECTRODES; SURFACE-AREA; SLIT-LIKE; IONS
AB Supercapacitors, commonly called electric double-layer capacitors (EDLCs), are emerging as a novel type of energy-storage device with the potential to substitute batteries in applications that require high power densities. In response to the latest experimental breakthrough in nanoporous carbon supercapacitors, we propose a heuristic theoretical model that takes pore curvature into account as a replacement for the EDLC model, which is based on a traditional parallel-plate capacitor. When the pore size is in the mesopofe regime (2-50 nm), counterions enter mesoporous carbon materials and approach the pore wall to form an electric double-cylinder capacitor (EDCC); in the micropore regime (<2 nm), solvated/desolvated counterions line up along the pore axis to form an electric wire-in-cylinder capacitor (EWCC). In the macropore regime (>50 nm) at which pores are large enough so that pore curvature is no longer significant, the EDCC model can be reduced naturally to the EDLC model. We present density functional theory calculations and detailed analyses of available experimental data in various pore regimes, which show the significant effects of pore curvature on the supercapacitor properties of nanoporous carbon materials. It is shown that the EDCC/EWCC model is universal for carbon supercapacitors with diverse carbon materials, including activated carbon materials, template carbon materials, and novel carbide-derived carbon materials, and with diverse electrolytes, including organic electrolytes, such as tetraethylammonium tetrafluoroborate (TEABF(4)) and tetraethylammonium methylsulfonate (TEAMS) in acetonitrile, aqueous H2SO4 and KOH electrolytes, and even an ionic liquid electrolyte, such as 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide (EMI-TFSI). The EDCC/EWCC model allows the supercapacitor properties to be correlated with pore size, specific surface area, Debye length, electrolyte concentration and dielectric constant, and solute ion size It may lend support for the systematic optimization of the properties of carbon supercapacitors through experiments. On the basis of the insight obtained from the new model, we also discuss the effects of the kinetic solvation/desolvation process, multimodal (versus unimodal) pore size distribution, and exohedral (versus endohedral) capacitors on the electrochemical properties of supercapacitors.
C1 [Huang, Jingsong; Sumpter, Bobby G.; Meunier, Vincent] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Huang, JS (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
EM huangj3@ornl.gov
RI Huang, Jingsong/A-2789-2008; Meunier, Vincent/F-9391-2010; Sumpter,
Bobby/C-9459-2013
OI Huang, Jingsong/0000-0001-8993-2506; Meunier,
Vincent/0000-0002-7013-179X; Sumpter, Bobby/0000-0001-6341-0355
NR 75
TC 259
Z9 268
U1 44
U2 344
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 0947-6539
J9 CHEM-EUR J
JI Chem.-Eur. J.
PY 2008
VL 14
IS 22
BP 6614
EP 6626
DI 10.1002/chem.200800639
PG 13
WC Chemistry, Multidisciplinary
SC Chemistry
GA 334JB
UT WOS:000258217000008
PM 18576455
ER
PT J
AU Verat, AY
Fan, HJ
Pink, M
Chen, YS
Caulton, KG
AF Verat, Alexander Y.
Fan, Hongjun
Pink, Maren
Chen, Y. -S.
Caulton, Kenneth G.
TI Spin state, structure, and reactivity of terminal oxo and dioxygen
complexes of the (PNP)Rh moiety
SO CHEMISTRY-A EUROPEAN JOURNAL
LA English
DT Article
DE C-H activation; dioxygen ligands; nitrous oxide; oxo ligands; rhodium
ID C-H BONDS; O-O; METAL; HYDROXO; THERMODYNAMICS; ENERGIES; LIGANDS; O-2;
RH
AB [Rh(III)H{(tBu(2)PCH(2)SiMe(2)-NSiMe(2)CH(2)PtBu{CMe(2)CH(2)})}], ([RhH-(PNP*)]), reacts with O(2) in the time taken to mix the reagents to form a 1:1 eta(2)-O(2) adcluct, for which O - O bond length is discussed with reference to the reducing power of [RhH(PNP*)]; DFT calculations faithfully replicate the observed O - O distance, and are used to understand the oxidation state of this coordinated O(2). The reactivity of [Rh(O(2))(PNP)] towards H(2), CO, N(2), and O(2) is tested and compared to the associated DFT reaction energies. Three different reagents effect single oxygen atom transfer to [RhH(PNP*)]. The resulting [RhO(PNP)]. characterized at and above -60 degrees C and by DFT calculations, is a ground-state triplet, is nonplanar, and reacts, above about +15 degrees C, with its own tBu C - H bond, to cleanly form a diamagnetic complex, [Rh(OH){N(SiMe(2)CH(2)PtBu(2))(SiMe(2-)CH(2)PtBu{CMe(2)CH(2)})}].
C1 [Caulton, Kenneth G.] Indiana Univ, Dept Chem, Bloomington, IN 47405 USA.
Argonne Natl Lab, Argonne, IL 60439 USA.
RP Caulton, KG (reprint author), Indiana Univ, Dept Chem, Bloomington, IN 47405 USA.
EM caulton@indiana.edu
FU National Science Foundation [NSF-CHE-0544829]; DOE [CHE0087817]; DOE-BES
[W-31-109-Eng-38]
FX This work was supported by the National Science Foundation
(NSF-CHE-0544829) and by the DOE under grant number CHE0087817, and by
the DOE-BES under contract number W-31-109-Eng-38 at the Advanced Photon
Source.
NR 26
TC 31
Z9 31
U1 1
U2 9
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0947-6539
J9 CHEM-EUR J
JI Chem.-Eur. J.
PY 2008
VL 14
IS 25
BP 7680
EP 7686
DI 10.1002/chem.200800573
PG 7
WC Chemistry, Multidisciplinary
SC Chemistry
GA 346OZ
UT WOS:000259079400032
PM 18680118
ER
PT J
AU Schelter, EJ
Veauthier, JM
Graves, CR
John, KD
Scott, BL
Thompson, JD
Pool-Davis-Tournear, JA
Morris, DE
Kiplinger, JL
AF Schelter, Eric J.
Veauthier, Jacqueline M.
Graves, Christopher R.
John, Kevin D.
Scott, Brian L.
Thompson, Joe D.
Pool-Davis-Tournear, Jaime A.
Morris, David E.
Kiplinger, Jaqueline L.
TI 1,4-dicyanobenzene as a scaffold for the preparation of bimetallic
actinide complexes exhibiting metal-metal communication
SO CHEMISTRY-A EUROPEAN JOURNAL
LA English
DT Article
DE actinides; bimetallic complexes; electrochemistry; electronic
communication; magnetic properties
ID SQUARE-WAVE VOLTAMMETRY; BIS(KETIMIDO) COMPLEXES; URANIUM(IV) COMPLEXES;
ELECTRONIC-STRUCTURE; MAGNETIC-BEHAVIOR; CRYSTAL-STRUCTURE;
EXCITED-STATES; CU-II; U-IV; COORDINATION
AB Reaction of two equivalents of [(C(5)Me(4)Et)(2)U(CH(3))(Cl)] (6) or [(C(5)Me(5))(2)Th(CH(3))(Br)] (7) with 1.4-dicyanobenzene leads to the formation of the novel 1,4-phenytenediketimide-bridged bimetallic organoactinide complexes [1(C(5)Me(4)Et)(2)(Cl)U](2)(mu-{N=C(CH(3))-C(6)H(4)-(CH(3))C=N})] (8) and [{(C(5)Me(5))(2)(Br)-Th}(2)(mu-{N=C(CH(3))-C(6)H(4)(CH(3))C=N})] (9). respectively. These complexes were structurally characterized by single-crystal X-ray diffraction and NMR spectroscopy. Metal-metal interactions in these isovalent bimetallic systems were assessed by means of cyclic voltammetry, UV-visible/NIR absorption spectroscopy, and variable-temperature magnetic susceptibility Although evidence for magnetic coupling between metal centers in the bimetallic U(IV)/U(IV) (5f(2)-5f(2)) complex is ambiguous, the complex displays appreciable electronic communication between the metal centers through the T system of the dianionic diketimide bridging ligand, as judged by voltammetry. The transition intensities of the f-f bands for the bimetallic U(IV)/U(IV) system decrease substantially compared to the related monometallic ketimide chloride complex, [(C(5)Me(5))(2)U(Cl){-N= C(CH(3))-(3,4,5-F(3)-C(6)H(2))}] (11). Also reported herein are new synthetic routes to the actinide starting materials [(C(5)Me(4)Et)(2)U(CH(3))(Cl)] (6) and [(C(5)Me(5))(2)Th(CH(3))(Br)] (7) in addition to the syntheses and structures of the monometallic uranium complexes [(C(5)Me(4)Et)(2)UCl(2)] (3). [(C(5)Me(4)Et)(2)U- (CH(3))(2)] (4), [(C(5)Me(4)Et)(2)U{-N=C(CH(3))-C(6)H(4)-C=N}(2)] (10). and 11.
C1 [Schelter, Eric J.; Veauthier, Jacqueline M.; Graves, Christopher R.; John, Kevin D.; Scott, Brian L.; Thompson, Joe D.; Pool-Davis-Tournear, Jaime A.; Morris, David E.; Kiplinger, Jaqueline L.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Kiplinger, JL (reprint author), Los Alamos Natl Lab, Mail Stop J514, Los Alamos, NM 87545 USA.
EM kiplinger@lanl.gov
RI Schelter, Eric/E-2962-2013; Morris, David/A-8577-2012; Kiplinger,
Jaqueline/B-9158-2011; Scott, Brian/D-8995-2017;
OI Kiplinger, Jaqueline/0000-0003-0512-7062; Scott,
Brian/0000-0003-0468-5396; Veauthier, Jacqueline/0000-0003-2206-7786;
John, Kevin/0000-0002-6181-9330
FU Los Alamos National Laboratory; LANL G. T. Seaborg Institute; LANL
Laboratory Directed Research & Development program; Division of Chemical
Sciences, Office of Basic Energy Sciences, Heavy Element Chemistry
program
FX For financial support of the work, we acknowledge Los Alamos National
Laboratory (Frederick Reines PD Fellowship to E.J.S. & Director's PD
Fellowship to E.J.S., C.R.G. and J.A.P.D.T), the LANL G. T. Seaborg
Institute (PD Fellowships to E.J.S. and C.R.G.), the LANL Laboratory
Directed Research & Development program, and the Division of Chemical
Sciences, Office of Basic Energy Sciences, Heavy Element Chemistry
program. Jim Cruz (Los Alamos National Laboratory) is acknowledged for
the cover picture artwork.
NR 64
TC 28
Z9 28
U1 2
U2 11
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 0947-6539
J9 CHEM-EUR J
JI Chem.-Eur. J.
PY 2008
VL 14
IS 26
BP 7782
EP 7790
DI 10.1002/chem.200800585
PG 9
WC Chemistry, Multidisciplinary
SC Chemistry
GA 352US
UT WOS:000259523500009
PM 18688839
ER
PT J
AU Liu, GD
Wang, J
Barry, R
Petersen, C
Timchalk, C
Gassman, PL
Lin, YH
AF Liu, Guodong
Wang, Jun
Barry, Richard
Petersen, Catherine
Timchalk, Charles
Gassman, Paul L.
Lin, Yuehe
TI Nanoparticle-Based Electrochemical Immunosensor for the Detection of
Phosphorylated Acetylcholinesterase: An Exposure Biomarker of
Organophosphate Pesticides and Nerve Agents
SO CHEMISTRY-A EUROPEAN JOURNAL
LA English
DT Article
DE acetylcholinesterase; immunochemistry; nanoparticles; organophosphate
pesticides; sensors
ID MASS-SPECTROMETRIC ANALYSIS; CHEMICAL WARFARE AGENTS; BISMUTH FILM
ELECTRODE; RETROSPECTIVE DETECTION; METHYLPHOSPHONIC ACID;
DEGRADATION-PRODUCTS; HYDROLYTIC ENZYMES; PARAOXON DETECTION; SULFUR
MUSTARD; INHIBITION
AB A nanoparticle-based electrochemical immunosensor has been developed for the detection of phosphorylated acetylcholinesterase (AChE), which is a potential biomarker of exposure to organophosphate (OP) pesticides and chemical warfare nerve agents. Zirconia nanoparticles (ZrO2, NPs) were used as selective sorbents to capture the phosphorylated AChE adduct, and quantum dots (ZnS@CdS, QDs) were used as tags to label monoclonal anti-AChE antibody to quantify the immunorecognition events. The sandwich-like immunoreactions were performed among the ZrO2 NPs, which were pre-coated on a screen printed electrode (SPE) by electrodeposition, phosphorylated AChE and QD-anti-AChE. The captured OD tags were determined on the SPE by electrochemical stripping analysis of its metallic component (cadmium) after an acid-dissolution step. Paraoxon was used as the model OP insecticide to prepare the phosphorylated AChE adducts to demonstrate proof of principle for the sensor. The phosphorylated AChE adduct was characterized by Fourier transform infrared spectroscopy (FTIR) and mass spectroscopy. The binding affinity of anti-AChE to the phosphorylated AChE was validated with an enzyme-linked immunosorbent assay. The parameters (e.g., amount of ZrO2 NP, QD-anti-AChE concentration,) that govern the electrochemical response of immunosensors were optimized. The voltammetric response of the immunosensor is highly linear over the range of 10 pm to 4 nm phosphorylated AChE, and the limit of detection is estimated to be 8.0 pm. The immunosensor also successfully detected phosphorylated AChE in human plasma. This new nanoparticle-based electrochemical immunosensor provides an opportunity to develop field-deployable, sensitive, and quantitative biosensors for monitoring exposure to a variety of OP pesticides and nerve agents.
C1 [Liu, Guodong; Wang, Jun; Barry, Richard; Petersen, Catherine; Timchalk, Charles; Gassman, Paul L.; Lin, Yuehe] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Liu, Guodong] N Dakota State Univ, Dept Chem & Mol Biol, Fargo, ND 58105 USA.
RP Lin, YH (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA.
EM yuehe.lin@pnl.gov
RI Lin, Yuehe/D-9762-2011
OI Lin, Yuehe/0000-0003-3791-7587
FU National Institutes of Health Counter-ACT Program through the National
Institute of Neurological Disorders and Strokes [NS058161-01]; CDC/NIOSH
[R01 OH008173-01]; Environmental Molecular Sciences Laboratory;
Environmental Research and located at Pacific Northwest National
Laboratory [DE-AC05-76 L01830]
FX This work was supported by the National Institutes of Health Counter-ACT
Program through the National Institute of Neurological Disorders and
Strokes (award No. NS058161-01) and partially by CDC/NIOSH Grant R01
OH008173-01. We thank Andrea Busby for performing the Ellman assays in
this study. The research described in this paper was performed at the
Environmental Molecular Sciences Laboratory, a national scientific user
facility sponsored by DOE's Office of Biological and Environmental
Research and located at Pacific Northwest National Laboratory, which is
operated by Battelle for DOE under Contract DE-AC05-76 L01830. Its
contents are solely the responsibility of the authors and do not
necessarily represent the official views of the federal government.
NR 48
TC 77
Z9 79
U1 4
U2 64
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY
SN 0947-6539
EI 1521-3765
J9 CHEM-EUR J
JI Chem.-Eur. J.
PY 2008
VL 14
IS 32
BP 9951
EP 9959
DI 10.1002/chem.20080041.2
PG 9
WC Chemistry, Multidisciplinary
SC Chemistry
GA 374WQ
UT WOS:000261074800019
PM 18942695
ER
PT J
AU Sponer, JE
Sumpter, BG
Leszczynski, J
Sponer, J
Fuentes-Cabrera, M
AF Sponer, Judit E.
Sumpter, Bobby G.
Leszczynski, Jerzy
Sponer, Jiri
Fuentes-Cabrera, Miguel
TI Theoretical Study on the Factors Controlling the Stability of the Borate
Complexes of Ribose, Arabinose, Lyxose, and Xylose
SO CHEMISTRY-A EUROPEAN JOURNAL
LA English
DT Article
DE borates; carbohydrates; density functional calculations; genetic
material; RNA
ID GAS-PHASE; ENERGIES; RNA; EVOLUTION; SUGARS; MODEL
AB Recent experimental studies suggest that complexation with borate minerals stabilizes ribose, and that the borate complex of ribose is more stable than those of related aldopentoses, that is, arabinose, lyxose, and xylose. These findings have revived the debate on the plausibility of the RNA-world theory, because the), provide an explanation for the stabilization and selection of ribose in prebiotic conditions. In this paper we unravel the factors that make the ribose-borate complex the most stable one. For this purpose, we have investigated the structure and stability of the ribose-, arabinose-, lyxose-, and xylose-borate complexes using density functional theory and a continuum solvent approach. The computed results reveal that in the aldopentose-borate complexes, the electrostatic field of the borate is strong enough to change the orientation of the nearby hydroxyl groups compared to noncomplexed aldopentoses. In addition, we show that the distinct stability of the ribose-borate 2:1 complex can be attributed to 1) a strong hydrogen bond between the ribose 3-OH and one of the negatively charged borate oxygen atoms, and 2) a favorable contact between the aqueous medium and the 5-CH2OH group due to the space separation between the 5-CH2OH group and the borate anion.
C1 [Sponer, Judit E.; Sponer, Jiri] Acad Sci Czech Republic, Inst Biophys, CS-61265 Brno, Czech Republic.
[Sumpter, Bobby G.; Fuentes-Cabrera, Miguel] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
[Sumpter, Bobby G.; Fuentes-Cabrera, Miguel] Oak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN 37831 USA.
[Leszczynski, Jerzy] Jackson State Univ, Dept Chem, Computat Ctr Mol Struct & Interact, Jackson, MS 39217 USA.
RP Sponer, JE (reprint author), Acad Sci Czech Republic, Inst Biophys, Kralovopolska 135, CS-61265 Brno, Czech Republic.
EM judit@ncbr.chemi.muni.cz; fuentecscabma@ornl.gov
RI Sponer, Jiri/D-9467-2012; Sponer, Judit/D-9918-2012; Sumpter,
Bobby/C-9459-2013; Fuentes-Cabrera, Miguel/Q-2437-2015
OI Sumpter, Bobby/0000-0001-6341-0355; Fuentes-Cabrera,
Miguel/0000-0001-7912-7079
FU Academy of Sciences of the Czech Republic [IAA400550701, IAA400040802,
1QS500040581, AVOZ50040507, AVOZ50040702]; Ministry of Education of the
Czech Republic [LC06030]; NSF Chemical Bonding Center [0739189]; Center
for Nanophase Materials Sciences; Division of Scientific User
Facilities; U.S Department of Energy (USDOE) (BGS, MFC)
FX This contribution was supported by the Grant Agency of the Academy of
Sciences of the Czech Republic, grants IAA400550701, IAA400040802,
1QS500040581, by the Academy of Sciences of the Czech Republic, grants
AVOZ50040507 and AVOZ50040702, the Ministry of Education of the Czech
Republic, grant LC06030, as well as NSF Chemical Bonding Center, grant
0739189. Work at Oak Ridge National Laboratory (ORNL) was supported by
the Center for Nanophase Materials Sciences, sponsored by the Division
of Scientific User Facilities, U.S Department of Energy (USDOE) (BGS,
MFC).
NR 27
TC 21
Z9 21
U1 2
U2 18
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA POSTFACH 101161, 69451 WEINHEIM, GERMANY
SN 0947-6539
EI 1521-3765
J9 CHEM-EUR J
JI Chem.-Eur. J.
PY 2008
VL 14
IS 32
BP 9990
EP 9998
DI 10.1002/chem.200800961
PG 9
WC Chemistry, Multidisciplinary
SC Chemistry
GA 374WQ
UT WOS:000261074800023
PM 18810746
ER
PT J
AU Neville, SM
Leita, BA
Halder, GJ
Kepert, CJ
Moubaraki, B
Letard, JF
Murray, KS
AF Neville, Suzanne M.
Leita, Benjamin A.
Halder, Gregory J.
Kepert, Cameron J.
Moubaraki, Boujemaa
Letard, Jean-Francois
Murray, Keith S.
TI Understanding the Two-Step Spin-Transition Phenomenon in Iron(II) 1D
Chain Materials
SO CHEMISTRY-A EUROPEAN JOURNAL
LA English
DT Article
DE 1D chain; chain structures; iron; magnetic properties; spin crossover
ID MOLECULAR-BASED MATERIALS; CROSSOVER COMPLEXES; COORDINATION POLYMERS;
CRITICAL-TEMPERATURE; FRAMEWORK MATERIAL; PHASE-TRANSITIONS;
CRYSTAL-STRUCTURE; SPACER LENGTH; COMPOUND; LIGHT
AB Three analogous one dimensional (1D) polymeric iron(II) spin crossover (SCO) materials containing the new ligand 4,6-bis(2',2"-pyridyl)pyrazine (bdpp) have been comprehensively characterised magnetically (thermal and light-induced) and structurally. Within this series are two polymorphs of the formula [Fe(NCS)(2)(bdpp)], 1 and 2a, which differ magnetically in that phase 1. undergoes a full two-step SCO (T(1/2(1)) = 135K and T(1/2(2)) = 90 K) whereas phase 2a remains high spin (HS) over all temperatures. The central distinction between these two materials lies in the presence of intermolecular pi-pi interactions generated by the crystal packing in 1, which are absent in 2a. The isostructural selenocyanate analogue of 2a, [Fe(NCSe)(2)(bdpp)], 2b, undergoes a full two-step SCO (T(1/2(1)) = 200K and T(1/2(2)) = 125 K). Structural analyses of 1 and 2b at a range of temperatures provide deep insight into their two-step SCO nature. Structural analysis of 1 at 25 K (1(LS-LS)), 123 K (1(LS-HS)) and 250 K (1(HS-HS)) reveals two distinct iron(II) centres at each temperature, with ordered, alternating HS and LS (low spin) sites at the intermediate plateau (1P) temperatures. In contrast, structural analysis of 2b at 90 K (2b(LS)), 150 K (2b(LS/HS)) and 250 K (2b(HS)) reveals one unique iron(II) centre at each temperature with an "averaged" LS/HS character at the IP temperature. Weak planes of diffuse scattering in the single-crystal X-ray diffraction patterns were observed for this phase at 90 and 150 K, indicating that ID long range ordering of alternating HS/LS iron(II) centres occurs along the ID coordination chains, but that there is no correlation between chains. The lack of observable diffuse scattering at 250 K suggests that the onset of the 1D structural ordering in the chain direction corresponds to the first step of the SCO and that this structural transition is electronically driven. The photomagnetic properties of both 1 and 2b have been investigated and show approximate to 62 and 53% photo-excitation of a HS metastable state at low temperatures and T(LIESST) values of 55 and 49 K, respectively. Relaxation studies on the HS fraction in 2b fitted well to a stretched exponential model with kinetic parameters indicative of weak cooperativity.
C1 [Neville, Suzanne M.; Leita, Benjamin A.; Moubaraki, Boujemaa; Murray, Keith S.] Monash Univ, Sch Chem, Clayton, Vic 3800, Australia.
[Halder, Gregory J.; Kepert, Cameron J.] Univ Sydney, Sch Chem, Sydney, NSW 2006, Australia.
[Halder, Gregory J.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
[Letard, Jean-Francois] Univ Bordeaux 1, CNRS,UPR 9048, ICMCB, Lab Sci Mol, F-33608 Pessac, France.
RP Neville, SM (reprint author), Monash Univ, Sch Chem, Bldg 23, Clayton, Vic 3800, Australia.
EM keith.murray@sci.monash.edu.au
RI neville, suzanne/B-4531-2013; Halder, Gregory/C-5357-2013; neville,
suzanne/B-2254-2016;
OI neville, suzanne/0000-0003-4237-4046; Kepert,
Cameron/0000-0002-6105-9706
FU The Australian Research Council, ARC; LIESST; French-Australia FAST/DEST
FX The Australian Research Council, ARC. is thanked for providing a
Discovery Grant to Support this work. Financial support for the
photomagnetic LIESST work was kindly provided by a French-Australia
FAST/DEST grant and this allowed the Australian participants to travel
to Bordeaux to carry out measurements. The authors Would also like to
thank the Aquitaine Region for supporting the development of the
international platform of photomagnetism.
NR 61
TC 69
Z9 69
U1 1
U2 28
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 0947-6539
J9 CHEM-EUR J
JI Chem.-Eur. J.
PY 2008
VL 14
IS 32
BP 10123
EP 10133
DI 10.1002/chem.200800886
PG 11
WC Chemistry, Multidisciplinary
SC Chemistry
GA 374WQ
UT WOS:000261074800037
PM 18803203
ER
PT J
AU Koshkakaryan, G
Parimal, K
He, JM
Zhang, XY
Abliz, Z
Flood, AH
Liu, Y
AF Koshkakaryan, Gayane
Parimal, Kumar
He, Jiuming
Zhang, Xiyun
Abliz, Zeper
Flood, Amar H.
Liu, Yi
TI pi-Stacking Enhanced Dynamic and Redox-Switchable Self-Assembly of
Donor-Acceptor Metallo-[2]Catenanes from Diimide Derivatives and Crown
Ethers
SO CHEMISTRY-A EUROPEAN JOURNAL
LA English
DT Review
DE catenanes; coordination; donor-acceptor system; stacking interactions;
supramolecular chemistry
ID MOLECULAR INFORMATION RATCHET; RING-CLOSING METATHESIS; TEMPLATED
SYNTHESIS; TETRATHIAFULVALENE UNIT; COMBINATORIAL LIBRARIES;
PHOTOCHEMICALLY DRIVEN; THERMODYNAMIC CONTROL; BISTABLE ROTAXANES;
OLEFIN METATHESIS; ELECTRON-TRANSFER
C1 [Koshkakaryan, Gayane; Liu, Yi] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Parimal, Kumar; Flood, Amar H.] Indiana Univ, Dept Chem, Bloomington, IN 47405 USA.
[He, Jiuming; Abliz, Zeper] Chinese Acad Med Sci, Inst Mat Med, Beijing 100050, Peoples R China.
[He, Jiuming; Abliz, Zeper] Peking Union Med Coll, Beijing 100050, Peoples R China.
[Zhang, Xiyun] Codexis Inc, Redwood City, CA 94063 USA.
RP Liu, Y (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM yliu@lbl.gov
RI Liu, yi/A-3384-2008; Flood, Amar/B-3863-2016
OI Liu, yi/0000-0002-3954-6102;
FU U. S. Department of Energy [DE-AC02-05 CH11231]
FX This work was supported by the Office of Science, Office of Basic Energy
Sciences, of the U. S. Department of Energy under contract No.
DE-AC02-05 CH11231.
NR 125
TC 34
Z9 34
U1 0
U2 19
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 0947-6539
J9 CHEM-EUR J
JI Chem.-Eur. J.
PY 2008
VL 14
IS 33
BP 10211
EP 10218
DI 10.1002/chem.20081590
PG 8
WC Chemistry, Multidisciplinary
SC Chemistry
GA 381TS
UT WOS:000261559400006
PM 18855953
ER
PT J
AU Aromi, G
Bouwman, E
Burzuri, E
Carbonera, C
Krzystek, J
Luis, F
Schlegel, C
van Slageren, J
Tanase, S
Teat, SJ
AF Aromi, Guillem
Bouwman, Elisabeth
Burzuri, Enrique
Carbonera, Chiara
Krzystek, J.
Luis, Fernando
Schlegel, Christoph
van Slageren, Joris
Tanase, Stefania
Teat, Simon J.
TI A Novel Ni-4 Complex Exhibiting Microsecond Quantum Tunneling of the
Magnetization
SO CHEMISTRY-A EUROPEAN JOURNAL
LA English
DT Article
DE cluster compounds; magnetic properties; nickel; quantum tunneling;
relaxation
ID SINGLE-MOLECULE MAGNETS; GEM-DIOL FORM; CRYSTAL-STRUCTURES; SPIN
CLUSTERS; COPPER(II) COMPLEXES; DI-2-PYRIDYL KETONE; CUBANE COMPLEXES;
LOW-TEMPERATURES; NICKEL; LIGANDS
AB A highly asymmetric N-II cluster [Ni-4(OH)(OMe)(3)(Hphpz)(4)(MeOH)(3)](MeOH) (1) (H(2)phpz = 3-methyl-5-(2-hydroxyphenyl)pyrazole) has been prepared and its structure determined by means of single-crystal X-ray diffraction by using synchrotron radiation. Variable-temperature bulk-magnetization measurements show that the complex exhibits intramolecular ferromagnetic interactions leading to a spin ground state S=4 with close-lying excited states. Magnetization and high-frequency EPR measurements suggest the presence of sizable Ising-type magnetic anisotropy, with zero-field splitting parameters D = -0.263 cm(-1) and E = 0.04 cm(-1) for the spin ground state, and an isotropic g value of 2.25. The presence of both axial and transverse anisotropy was confirmed through low-temperature specific heat determinations down to 300 mK, but no slow relaxation of the magnetization was observed by AC measurements down to 1.8 K. Interestingly, AC susceptibility measurements down to temperatures as low as 23 mK showed no indication of slow relaxation of the magnetization in 1. Thus, despite the presence of an anisotropy barrier (U approximate to 4.21 cm(-1) for the purely axial limit), the magnetization relaxation remains extremely fast down to the lowest temperatures. The estimated quantum tunneling rate, Gamma > 0.667 MHz, makes this complex a prime candidate for observation of coherent tunneling of the magnetization.
C1 [Aromi, Guillem] Univ Barcelona, Fac Quim, Dept Quim Inorgan, E-08028 Barcelona, Spain.
[Bouwman, Elisabeth; Tanase, Stefania] Leiden Univ, Leiden Inst Chem, Gorlaeus Labs, NL-2300 RA Leiden, Netherlands.
[Burzuri, Enrique; Carbonera, Chiara; Luis, Fernando] Univ Zaragoza, CSIC, Inst Ciencia Mat Aragon, E-50009 Zaragoza, Spain.
[Burzuri, Enrique; Carbonera, Chiara; Luis, Fernando] Dept Fis Mat Condensada, Zaragoza 50009, Spain.
[Krzystek, J.] Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA.
[Schlegel, Christoph; van Slageren, Joris] Univ Stuttgart, Inst Phys 1, D-70550 Stuttgart, Germany.
[van Slageren, Joris] Univ Nottingham, Sch Chem, Nottingham NG7 2RD, England.
[Teat, Simon J.] SERC, Daresbury Lab, Warrington WA4 4AD, Cheshire, England.
[Teat, Simon J.] Univ Calif Berkeley, Lawrence Berkeley Lab, Light Source, Berkeley, CA 94720 USA.
RP Aromi, G (reprint author), Univ Barcelona, Fac Quim, Dept Quim Inorgan, Diagonal 647, E-08028 Barcelona, Spain.
EM guillem.aromi@qi.ub.cs; Joris.Van.Slageren@nottingham.ac.uk
RI LUIS, Fernando/E-9108-2011; Aromi, Guillem/I-2483-2015; Tanase,
Stefania/E-9933-2010; Bouwman, Elisabeth/D-1637-2010;
OI LUIS, Fernando/0000-0001-6284-0521; Aromi, Guillem/0000-0002-0997-9484;
Bouwman, Elisabeth/0000-0001-7762-3968; Burzuri,
Enrique/0000-0001-7906-7192
FU German Science Foundation (DFG); German Academic Exchange Service
(DAAD); NAMESBI; MOLBIT; Integrated Action between Spain and Germany
[HA2006-0051]; Network of Excellence MAGMANet; National Science
Foundation [DMR 0654119]; State of Florida
FX Financial support from the following sources is gratefully acknowledged:
German Science Foundation (DFG), German Academic Exchange Service
(DAAD), Project NAMESBI (Spanish Strategic Action on Nanoscience and
Nanotechnology), Project MOLBIT (Spanish Ministry of Science and
Education), Integrated Action between Spain and Germany (HA2006-0051),
and Network of Excellence MAGMANet. NHMFL is supported by the National
Science Foundation (Cooperative Agreement DMR 0654119) and the State of
Florida. We thank A. Ozarowski and S. Stoll for the EPR simulation
software.
NR 65
TC 27
Z9 27
U1 3
U2 20
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY
SN 0947-6539
EI 1521-3765
J9 CHEM-EUR J
JI Chem.-Eur. J.
PY 2008
VL 14
IS 35
BP 11158
EP 11166
DI 10.1002/chem.200801450
PG 9
WC Chemistry, Multidisciplinary
SC Chemistry
GA 387DX
UT WOS:000261933000034
PM 18972463
ER
PT J
AU Zhu, YH
Lee, C
Kemp, RA
Hosmane, NS
Maguire, JA
AF Zhu, Yinghuai
Lee, Cjin Nong
Kemp, Richard A.
Hosmane, Narayan S.
Maguire, John A.
TI Latest developments in the catalytic application of nanoscaled neutral
Group 8-10 metals
SO CHEMISTRY-AN ASIAN JOURNAL
LA English
DT Review
DE C-C coupling; ionic liquids; isotopic labeling; nanostructures;
transition metals
ID IMIDAZOLIUM IONIC LIQUIDS; SUPPORTED PALLADIUM NANOPARTICLES; STABILIZED
RH(0) NANOCLUSTERS; MODIFIED MESOPOROUS SILICA; CROSS-COUPLING
REACTIONS; WALLED CARBON NANOTUBE; FUEL-CELL APPLICATIONS; PLATINUM
NANOPARTICLES; PD NANOPARTICLES; ENANTIOSELECTIVE HYDROGENATION
AB In the last few decades, the synthesis and catalytic application of nanoscaled particles prepared from Group 8-10 (formerly Group VIIIB) elements have been widely explored and have achieved promising results. The innovative use of these nanoparticle catalysts may provide new opportunities in the efficient combination of conventionally used homogenous and heterogeneous catalysts. Conventional homogeneous catalysts pose extraction and recycling difficulties when dealing with metal complexes and/or ligands, whereas heterogeneous catalysts generally require more pressing experimental conditions, such as high temperatures and high pressures, to be effective. Therefore, to solve these problems, the synthesis and use of nanoparticle catalysts as replacements for conventional catalytic systems is a breakthrough owing to their improved handling and environmental and economic aspects. This Focus Review primarily addresses the catalytic applications of neutral Group 8-10 nanoparticles with an average size of less than 10 nm, and also includes a discussion of commonly used synthetic methodology.
C1 [Zhu, Yinghuai; Lee, Cjin Nong] ICES, Singapore 627833, Singapore.
[Kemp, Richard A.] Univ New Mexico, Dept Chem & Chem Biol, Albuquerque, NM 87131 USA.
[Kemp, Richard A.] Sandia Natl Labs, Adv Mat Lab, Albuquerque, NM 87106 USA.
[Hosmane, Narayan S.] No Illinois Univ, Dept Chem & Chem Biol, De Kalb, IL 60115 USA.
[Maguire, John A.] So Methodist Univ, Dept Chem, Dallas, TX 75275 USA.
RP Zhu, YH (reprint author), ICES, 1 Pesek Rd, Singapore 627833, Singapore.
EM zhuz_inghuai@ices.a-star.edu.sg
NR 157
TC 31
Z9 31
U1 1
U2 25
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 1861-4728
J9 CHEM-ASIAN J
JI Chem.-Asian J.
PY 2008
VL 3
IS 4
BP 650
EP 662
DI 10.1002/asia.200800005
PG 13
WC Chemistry, Multidisciplinary
SC Chemistry
GA 293QG
UT WOS:000255349200001
PM 18348146
ER
PT J
AU Monnard, PA
Ziock, H
AF Monnard, Pierre-Alain
Ziock, Hans
TI Eutectic phase in water-ice: A self-assembled environment conducive to
metal-catalyzed non-enzymatic RNA polymerization
SO CHEMISTRY & BIODIVERSITY
LA English
DT Article; Proceedings Paper
CT 13th International Conference on Biological Inorganic Chemistry
CY JUL 15-20, 2007
CL Vienna, AUSTRIA
ID TEMPLATE-DIRECTED SYNTHESIS; HAIRPIN OLIGONUCLEOTIDES; MONTMORILLONITE
CATALYSIS; PREBIOTIC SYNTHESIS; COLD ORIGIN; LIFE; LIGATION;
NUCLEOTIDES; RESIDUES; WORLD
AB Information and catalytic polymers play an essential role in Contemporary cellular life, and their emergence must have been crucial during the complex processes that led to the assembly of the first living systems. Polymerization reactions producing these Molecules Would have had to occur in aqueous medium, which is known to disfavor such reactions. Thus. it was Proposed early on that these polymerizations had to be Supported by particular environments, such as mineral Surfaces and eutectic phases in water-ice, which would have led to the concentration of the monomers out of the bulk aqueous medium and their condensation. This review presents the work conducted to understand how the eutectic phases in water-ice might have promoted RNA Polymerization, thereby Presumably contributing to the emergence of the ancient information and catalytic system envisioned by the 'RNA-World' hypothesis.
C1 [Monnard, Pierre-Alain; Ziock, Hans] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Monnard, PA (reprint author), Univ So Denmark, Dept Chem & Phys, Ctr Fundamental Living Technol FLinT, Campusvej 55, DK-5230 Odense M, Denmark.
EM monnard@ifk.sdu.dk
NR 62
TC 14
Z9 15
U1 0
U2 13
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 1612-1872
J9 CHEM BIODIVERS
JI Chem. Biodivers.
PY 2008
VL 5
IS 8
BP 1521
EP 1539
DI 10.1002/cbdv.200890141
PG 19
WC Biochemistry & Molecular Biology; Chemistry, Multidisciplinary
SC Biochemistry & Molecular Biology; Chemistry
GA 345CL
UT WOS:000258973500009
PM 18729089
ER
PT J
AU Luo, W
D'Angelo, EM
Coyne, MS
AF Luo, Wensui
D'Angelo, Efisa M.
Coyne, Mark S.
TI Organic carbon effects on aerobic polychlorinated biphenyl removal and
bacterial community composition in soils and sediments
SO CHEMOSPHERE
LA English
DT Article
DE biphenyl; salicylic acid; glucose; PCB; denaturing gradient gel
electrophoresis
ID GEL-ELECTROPHORESIS ANALYSIS; DEGRADING BACTERIA; BIODEGRADATION;
METABOLITES; INDUCTION; DIVERSITY
AB Certain organic compounds, including biphenyl and salicylic acid, stimulate polychlorinated biphenyl (PCB) degradation by microorganisms in some environments. However, the usefulness of these amendments for improving PCB removal by microorganisms from diverse habitats has not been extensively explored. This study evaluated the effects of biphenyl, salicylic acid, and glucose on changes in aerobic PCB removal and bacterial communities from an agricultural soil, a wetland peat soil, a river sediment, and a mixture of these samples. PCB removal patterns were significantly different between soils and sediments amended with carbon compounds: (i) terrestrial soil microorganisms removed more PCBs than river sediment microorganisms, particularly with regard to PCBs with >4 chlorine substituents, (ii) glucose-supplemented, agricultural soil microorganisms removed more hexachlorobiphenyl than unsupplemented samples, (iii) biphenyl-supplemented, river sediment microorganisms removed more di- and tri-chlorobiphenyls than unamended samples. Carbon amendments also caused unique shifts in soil and sediment bacterial communities, as determined by specific changes in bacterial 16S rRNA denaturing gradient gel electrophoresis banding patterns. These results indicate that organic carbon amendments had site-specific effects on bacterial populations and PCB removal. Further work is needed to more accurately characterize PCB degrading communities and functional gene expression in diverse types of environments to better understand how they respond to bioremediation treatments. (C) 2007 Elsevier Ltd. All rights reserved.
C1 [Luo, Wensui; D'Angelo, Efisa M.; Coyne, Mark S.] Univ Kentucky, Dept Plant & Soil Sci, Soil & Water Biogeochem Lab, Lexington, KY 40546 USA.
[Luo, Wensui] Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
RP Luo, W (reprint author), Univ Kentucky, Dept Plant & Soil Sci, Soil & Water Biogeochem Lab, Lexington, KY 40546 USA.
EM wensuil@yahoo.com
NR 27
TC 21
Z9 24
U1 0
U2 19
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0045-6535
J9 CHEMOSPHERE
JI Chemosphere
PD JAN
PY 2008
VL 70
IS 3
BP 364
EP 373
DI 10.1016/j.chemosphere.2007.07.022
PG 10
WC Environmental Sciences
SC Environmental Sciences & Ecology
GA 261YH
UT WOS:000253115400004
PM 17870145
ER
PT J
AU Shiju, NR
Guliants, VV
Overbury, SH
Rondinone, AJ
AF Shiju, N. Raveendran
Guliants, Vadim V.
Overbury, Steven H.
Rondinone, Adam J.
TI Toward Environmentally Benign Oxidations: Bulk Mixed Mo-V-(Te-Nb)-O M1
Phase Catalysts for the Selective Ammoxidation of Propane
SO CHEMSUSCHEM
LA English
DT Article
DE C3 feedstocks; heterogeneous catalysis; oxidation; structure elucidation
ID (AMM)OXIDATION CATALYSTS; MOVTE(SB)NBO CATALYSTS; OXIDE CATALYSTS;
ACTIVE-CENTERS; ACRYLIC-ACID; O-X; M2
C1 [Shiju, N. Raveendran; Guliants, Vadim V.] Univ Cincinnati, Dept Chem & Mat Engn, Cincinnati, OH 45221 USA.
[Overbury, Steven H.; Rondinone, Adam J.] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
RP Shiju, NR (reprint author), Univ Cincinnati, Dept Chem & Mat Engn, Cincinnati, OH 45221 USA.
EM rondinoneaj@ornl.gov
RI Rondinone, Adam/F-6489-2013; Overbury, Steven/C-5108-2016;
OI Rondinone, Adam/0000-0003-0020-4612; Overbury,
Steven/0000-0002-5137-3961; Raveendran, Shiju/0000-0001-7943-5864
FU Chemical Sciences, Geosciences and Biosciences Division, Office of Basic
Energy Sciences, Office of Science, U.S. Department of Energy
[DE-FG02-04ER15604]
FX This research was supported by the Chemical Sciences, Geosciences and
Biosciences Division, Office of Basic Energy Sciences, Office of
Science, U.S. Department of Energy (grant no. DE-FG02-04ER15604). This
research was conducted at the Center for Nanophase Materials Sciences,
which is sponsored at Oak Ridge National Laboratory by the Division of
Scientific User Facilities, U.S. Department of Energy.
NR 19
TC 9
Z9 9
U1 1
U2 19
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 1864-5631
J9 CHEMSUSCHEM
JI ChemSusChem
PY 2008
VL 1
IS 6
BP 519
EP 523
DI 10.1002/cssc.200800039
PG 5
WC Chemistry, Multidisciplinary; GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY
SC Chemistry; Science & Technology - Other Topics
GA 443LR
UT WOS:000265912100005
PM 18702149
ER
PT J
AU Liu, J
Cao, GZ
Yang, ZG
Wang, DH
Dubois, D
Zhou, XD
Graff, GL
Pederson, LR
Zhang, JG
AF Liu, Jun
Cao, Guozhong
Yang, Zhenguo
Wang, Donghai
Dubois, Dan
Zhou, Xiaodong
Graff, Gordon L.
Pederson, Larry R.
Zhang, Ji-Guang
TI Oriented Nanostructures for Energy Conversion and Storage
SO CHEMSUSCHEM
LA English
DT Review
DE energy conversion; energy storage; materials science; nanostructures
ID SENSITIZED SOLAR-CELLS; TIO2 NANOTUBE-ARRAYS; LITHIUM-ION BATTERIES;
MULTIPLE EXCITON GENERATION; ZNO NANOWIRE ARRAYS; DIMENSIONAL
THERMOELECTRIC-MATERIALS; ACCEPTOR CONJUGATED POLYMERS; MULTIWALLED
CARBON NANOTUBES; NANOCRYSTALLINE RUTILE TIO2; HYDROUS RUTHENIUM OXIDE
AB Recently, the role of nonostructured materials in addressing the challenges in energy and natural resources has attracted wide attention. In particular, oriented nonostructures demonstrate promising properties for energy harvesting, conversion, and storage. In this Review, we highlight the synthesis and application of oriented nanostructures in a few key areas of energy technologies, namely photovoltaics, batteries, supercapacitors, and thermoelectrics. Although the applications differ from field to field, a common fundamental challenge is to improve the generation and transport of electrons and ions. We highlight the role of high surface area to maximize the surface activity and discuss the importance of optimum dimension and architecture, controlled pore channels, and alignment of the nonocrystalline phase to optimize the transport of electrons and ions. Finally, we discuss the challenges in attaining integrated architectures to achieve the desired performance. Brief background information is provided for the relevant technologies, but the emphasis is focused mainly on the nanoscale effects of mostly inorganic-based materials and devices.
C1 [Liu, Jun; Yang, Zhenguo; Wang, Donghai; Dubois, Dan; Zhou, Xiaodong; Graff, Gordon L.; Pederson, Larry R.; Zhang, Ji-Guang] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Cao, Guozhong] Univ Washington, Dept Mat Sci & Engn, Seattle, WA 98195 USA.
RP Liu, J (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA.
EM jun.liu@pnl.gov; gzcao@u.washington.edu; zgary.yang@pnl.gov
RI Cao, Guozhong/E-4799-2011; Wang, Donghai/L-1150-2013
OI Wang, Donghai/0000-0001-7261-8510
FU Pacific Northwest National Laboratory; Office of Basic Energy Sciences;
U.S. Deportment of Energy (DOE); Battelle Memorial Institute for the
Deportment of Energy [DE-AC05-76 L01830]; University of Washington;
National Science Foundation [DMI-0455994, DMR-0605159]; Air Force Office
of Scientific Research [FA9550-06-1-032]; Department of Energy
[DE-FG02-07ER46467]; Washington Technology Center; Washington Research
Foundation; EnerG2, LLC
FX The work performed at the Pacific Northwest National Laboratory (PNNL)
was supported by the Laboratory-Directed Research and Development
Program of the Pacific Northwest National Laboratory and by the Office
of Basic Energy Sciences, U.S. Deportment of Energy (DOE). PNNL is a
multiprogram laboratory operated by the Battelle Memorial Institute for
the Deportment of Energy under contract DE-AC05-76 L01830. The work at
the University of Washington was supported in port by the National
Science Foundation (DMI-0455994 and DMR-0605159), Air Force Office of
Scientific Research (AFOSR-MURI, FA9550-06-1-032), Department of Energy
(DE-FG02-07ER46467), Washington Technology Center, Washington Research
Foundation, and EnerG2, LLC.
NR 306
TC 249
Z9 250
U1 35
U2 330
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 1864-5631
J9 CHEMSUSCHEM
JI ChemSusChem
PY 2008
VL 1
IS 8-9
BP 676
EP 697
DI 10.1002/cssc.200800087
PG 22
WC Chemistry, Multidisciplinary; GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY
SC Chemistry; Science & Technology - Other Topics
GA 443LW
UT WOS:000265912600002
PM 18693284
ER
PT J
AU Idriss, H
Scott, M
Llorca, J
Chan, SC
Chiu, W
Sheng, PY
Yee, A
Blackford, MA
Pas, SJ
Hill, AJ
Alamgir, FM
Rettew, R
Petersburg, C
Senanayake, SD
Barteau, MA
AF Idriss, Hicham
Scott, Morgan
Llorca, Jordi
Chan, Sze C.
Chiu, William
Sheng, Po-Yo
Yee, Anna
Blackford, Mark A.
Pas, Steve J.
Hill, Anita J.
Alamgir, Faisal M.
Rettew, Robert
Petersburg, Cole
Senanayake, Sanjaya D.
Barteau, Mark A.
TI A Phenomenological Study of the Metal-Oxide Interface: The Role of
Catalysis in Hydrogen Production from Renewable Resources
SO CHEMSUSCHEM
LA English
DT Article
DE heterogeneous catalysis; hydrogen; interfaces; supported catalysts;
transition metals
ID LIFETIME SPECTRA; ETHANOL; HYDROCARBONS; STEAM; BOND
C1 [Idriss, Hicham; Scott, Morgan; Chiu, William; Sheng, Po-Yo; Yee, Anna] Univ Auckland, Dept Chem, Auckland, New Zealand.
[Idriss, Hicham] Univ Aberdeen, Dept Chem, Aberdeen AB24 3UE, Scotland.
[Idriss, Hicham] Robert Gordon Univ, Aberdeen AB24 3UE, Scotland.
[Llorca, Jordi] Tech Univ Catalonia, Ed ETSEIBC, Barcelona 08028, Spain.
[Chan, Sze C.; Blackford, Mark A.] Univ Delaware, Dept Chem Engn, Newark, DE 19716 USA.
[Blackford, Mark A.] Australian Nucl Sci & Technol Org, Inst Mat & Engn Sci, Menai, NSW 2234, Australia.
[Pas, Steve J.; Hill, Anita J.] CSIRO Mat Sci & Engn, Clayton, Vic 3168, Australia.
[Pas, Steve J.; Hill, Anita J.] Monash Univ, Sch Chem, Clayton, Vic 3800, Australia.
[Pas, Steve J.; Hill, Anita J.] Monash Univ, Dept Mat Engn, Clayton, Vic 3800, Australia.
[Alamgir, Faisal M.; Rettew, Robert; Petersburg, Cole] Georgia Inst Technol, Sch Mat Sci & Technol, Atlanta, GA 30319 USA.
[Senanayake, Sanjaya D.] Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA.
RP Idriss, H (reprint author), Univ Auckland, Dept Chem, Private Bag 92019, Auckland, New Zealand.
EM h.idriss@auckland.ac.nz
RI Hill, Anita/B-9231-2011; Pas, Steven/F-6516-2013; Llorca,
Jordi/M-8134-2014; Senanayake, Sanjaya/D-4769-2009;
OI Llorca, Jordi/0000-0002-7447-9582; Senanayake,
Sanjaya/0000-0003-3991-4232; Alamgir, Faisal/0000-0002-0894-8096
FU Spanish Ministry of Science [PC12006-A7-0539]
FX J.L. acknowledges a grant from the Spanish Ministry of Science
(PC12006-A7-0539). This research was carried out in part at the National
Synchrotron Light Source, Brookhaven National Laboratory, which is
supported by the US Department of Energy, Division of Materials Sciences
and Division of Chemical Sciences.
NR 23
TC 59
Z9 59
U1 6
U2 25
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 1864-5631
J9 CHEMSUSCHEM
JI ChemSusChem
PY 2008
VL 1
IS 11
BP 905
EP 910
DI 10.1002/cssc.200800196
PG 6
WC Chemistry, Multidisciplinary; GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY
SC Chemistry; Science & Technology - Other Topics
GA 443LZ
UT WOS:000265912900004
PM 18988246
ER
PT J
AU Starrfield, S
Iliadis, C
Hix, WR
AF Starrfield, Sumner
Iliadis, Christian
Hix, W. Raphael
BE Bode, MF
Evans, A
TI Thermonuclear processes
SO CLASSICAL NOVAE, 2ND EDITION
SE Cambridge Astrophysics Series
LA English
DT Article; Book Chapter
ID ACCRETING WHITE-DWARFS; HYDROGEN SHELL FLASHES; X-RAY SOURCES;
POSSESSING ANGULAR-MOMENTUM; NUCLEAR-REACTION RATES; LARGE MAGELLANIC
CLOUD; NOVA V1974 CYGNI; CLASSICAL NOVAE; IA SUPERNOVAE; EVOLUTIONARY
SEQUENCES
C1 [Starrfield, Sumner] Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ 85287 USA.
[Iliadis, Christian] Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27599 USA.
[Hix, W. Raphael] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
RP Starrfield, S (reprint author), Arizona State Univ, Sch Earth & Space Explorat, POB 871404, Tempe, AZ 85287 USA.
NR 104
TC 63
Z9 63
U1 0
U2 0
PU CAMBRIDGE UNIV PRESS
PI CAMBRIDGE
PA THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE CB2 1RP, CAMBS, ENGLAND
BN 978-0-521-84330-0
J9 CAM ASTROPH
PY 2008
IS 43
BP 77
EP 101
PG 25
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA BAO81
UT WOS:000304922900006
ER
PT S
AU Garg, A
AF Garg, Arti
CA SuperMACHO Collaboration
BE BailerJones, CAL
TI Determination of Microlensing Selection Criteria for the SuperMACHO
Survey
SO CLASSIFICATION AND DISCOVERY IN LARGE ASTRONOMICAL SURVEYS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Conference on Classification and Discovery in Large
Astronomical Surveys
CY OCT 14-17, 2008
CL Ringberg Castle, GERMANY
SP Max Planck Inst Astron, Max Planck Gesell, DFG, Emmy Noether Programme
DE Galactic Halo; Dark Matter; Supernovae; Time series analysis
ID IMAGE SUBTRACTION; GALACTIC HALO; PHOTOMETRY
AB The SuperMACHO project is a 5 year survey to determine the nature of the lens population responsible for the excess microlensing rate toward the Large Magellanic Cloud observed by the MACHO project [1]. The survey probes deeper than earlier surveys unveiling many more extra-galactic contaminants, particularly type la supernovae and active galactic nuclei. Using similar to 10(7) simulated light curves of both microlensing events and type la supernovae we determine selection criteria optimized to maximize the microlensing detection efficiency while minimizing the contamination rate from non-micorlensing events. We discuss these simulations and the selection criteria.
C1 [Garg, Arti; SuperMACHO Collaboration] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Garg, A (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave,L-413, Livermore, CA 94550 USA.
NR 13
TC 1
Z9 1
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0613-1
J9 AIP CONF PROC
PY 2008
VL 1082
BP 263
EP 267
PG 5
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA BIT67
UT WOS:000262629900041
ER
PT S
AU Rest, A
Garg, A
AF Rest, Armin
Garg, Arti
CA SuperMACHO ESSENCE Collaborations
BE BailerJones, CAL
TI Detecting Rare Events in the Time-Domain
SO CLASSIFICATION AND DISCOVERY IN LARGE ASTRONOMICAL SURVEYS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Conference on Classification and Discovery in Large
Astronomical Surveys
CY OCT 14-17, 2008
CL Ringberg Castle, GERMANY
SP Max Planck Inst Astron, Max Planck Gesell, DFG, Emmy Noether Programme
DE Galactic Halo; Dark Matter; Supernovae; Time series analysis
ID LARGE-MAGELLANIC-CLOUD; LIGHT ECHOES; IMAGE SUBTRACTION; SUPERNOVAE;
PHOTOMETRY
AB One of the biggest challenges in current and future time-domain surveys is to extract the objects of interest from the immense data stream. There are two aspects to achieving this goal: detecting variable sources and classifying them. Difference imaging provides an elegant technique for identifying new transients or changes in source brightness. Much progress has been made in recent years toward refining the process. We discuss a selection of pitfalls that can afflict an automated difference imagine pipeline and describe some solutions. After identifying true astrophysical variables, we are faced with the challenge of classifying them. For rare events, such as supernovae and microlensing, this challenge is magnified because we must balance having selection criteria that select for the largest number of objects of interest against a high contamination rate. We discuss considerations and techniques for developing classification shemes.
C1 [Rest, Armin] Harvard Univ, Dept Phys, 17 Oxford St, Cambridge, MA 02138 USA.
[Garg, Arti; SuperMACHO ESSENCE Collaborations] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Rest, A (reprint author), Harvard Univ, Dept Phys, 17 Oxford St, Cambridge, MA 02138 USA.
FU NOAO Goldberg fellowship program; NOAO Survey Program; STScI [GO-10583,
GO-10903]
FX AR thanks the NOAO Goldberg fellowship program for its support. The
SuperMACHO and ESSENCE surveys was undertaken under the auspices of the
NOAO Survey Program. AG's work prepared by LLNL under Contract
DE-AC52-07NA27344. SuperMACHO is supported by the STScI grant GO-10583
and GO-10903.
NR 11
TC 2
Z9 2
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0613-1
J9 AIP CONF PROC
PY 2008
VL 1082
BP 294
EP +
PG 2
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA BIT67
UT WOS:000262629900046
ER
PT S
AU Borne, K
Becla, J
Davidson, I
Szalay, A
Tyson, JA
AF Borne, K.
Becla, J.
Davidson, I.
Szalay, A.
Tyson, J. A.
BE BailerJones, CAL
TI The LSST Data Mining Research Agenda
SO CLASSIFICATION AND DISCOVERY IN LARGE ASTRONOMICAL SURVEYS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Conference on Classification and Discovery in Large
Astronomical Surveys
CY OCT 14-17, 2008
CL Ringberg Castle, GERMANY
SP Max Planck Inst Astron, Max Planck Gesell, DFG, Emmy Noether Programme
DE catalogs; surveys; methods: data analysis; astronomical data bases:
miscellaneous
ID PHOTOMETRIC REDSHIFTS; CLASSIFICATION; SKY
AB We describe features of the LSST science database that are amenable to scientific data mining, object classification, outlier identification, anomaly detection, image quality assurance, and survey science validation. The data mining research agenda includes: scalability (at petabytes scales) of existing machine learning and data mining algorithms; development of grid-enabled parallel data mining algorithms; designing a robust system for brokering classifications from the LSST event pipeline (which may produce 10,000 or more event alerts per night); multi-resolution methods for exploration of petascale databases; indexing of multi-attribute multi-dimensional astronomical databases (beyond spatial indexing) for rapid querying of petabyte databases; and more.
C1 [Borne, K.] George Mason Univ, Computat & Data Sci, MS 6A2, Fairfax, VA 22030 USA.
[Becla, J.] Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
[Davidson, I.] Univ Calif Davis, Dept Comp Sci, Davis, CA 95616 USA.
[Szalay, A.] Johns Hopkins Univ, Dept Phys & Astron, Catonsville, MD 21228 USA.
[Tyson, J. A.] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA.
RP Borne, K (reprint author), George Mason Univ, Computat & Data Sci, MS 6A2, Fairfax, VA 22030 USA.
NR 27
TC 5
Z9 5
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0613-1
J9 AIP CONF PROC
PY 2008
VL 1082
BP 347
EP +
PG 2
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA BIT67
UT WOS:000262629900053
ER
PT B
AU Balachandran, U
Lee, TH
Dorris, SE
Udovich, CA
Scouten, CG
Marshall, CL
AF Balachandran, U. (Balu)
Lee, T. H.
Dorris, S. E.
Udovich, C. A.
Scouten, C. G.
Marshall, C. L.
BE Laudon, M
Romanowicz, B
Laird, DL
TI Novel Membrane Technology for Green Ethylene Production
SO CLEAN TECHNOLOGY 2008: BIO ENERGY, RENEWABLES, GREEN BUILDING, SMART
GRID, STORAGE, AND WATER
LA English
DT Proceedings Paper
CT Clean Technology and Sustainable Industries Conference and Trade Show
CY JUN 01-05, 2008
CL Boston, MA
SP Clean Technol & Sustainable Ind Org, Greenberg Traurig LLP, Jackson Walker LLP, IDA Ireland, Opportunity Houston, Alston & Bird LLP, K & L Gates, Buchanan Ingersoll & Rooney PC, Foley & Larder, LLP, Pacific Crest Securities, RockPort Capital Partners, Finnegan, Henderson, Farabow, Garrett & Dunner, LLP, Lehman Brothers, Nano Sci & Technol Inst, TechConnect, Cleantechnol & Sustainable Ind Events, Adv Mat Technol Pte Ltd, Adv Technol Ventures, ASCOMP GmbH, BP, Ecointesy, Life Cycle Syst, Energy Recovery, Inc, Kauffman Innovat Network, Inc, Motorola, Inc, Novomer, Oak Ridge Natl Lab, Taylor & Francis Group LLC, CRC Press, Penn State Univ, GlobalSpec, AllConferences Com, Battery Power Prod & Technol, BioBasedNews, BioDzl Com, Business Wire, Business Week, CLEAN, Soil, Air, Water, Design2Market, Fuel Cell Magazine, Inside Greentech, KCI Investing, Nature, R&D Magazine, Red Herring, Inc, Sci Magazine, Journal BioLaw & Business JB&B, Real Nanotech Investor
AB This paper describes the use of a dense hydrogen transport membrane (HTM) in producing ethylene via dehydrogenation of ethane. The HTM drives the conversion of ethane by selectively removing hydrogen that is produced by the dehydrogenation reaction. Preliminary experiments show ethylene yields above the thermodynamic equilibrium limit at high ethane conversion. Moreover, this approach eliminates production of greenhouse gases in the reactor section and yields a much simpler product slate than is obtained from current pyrolysis technology. With a simpler product slate, the cost of "back end" purification could be reduced significantly. We present here preliminary results from ethane dehydrogenation experiments, and describe the development of HTMs suitable for ethylene production.
C1 [Balachandran, U. (Balu); Lee, T. H.; Dorris, S. E.] Argonne Natl Lab, Div Energy Syst, Argonne, IL 60439 USA.
RP Balachandran, U (reprint author), Argonne Natl Lab, Div Energy Syst, 9700 S Cass Ave, Argonne, IL 60439 USA.
RI Marshall, Christopher/D-1493-2015
OI Marshall, Christopher/0000-0002-1285-7648
NR 4
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4200-8502-0
PY 2008
BP 31
EP 34
PG 4
WC Energy & Fuels
SC Energy & Fuels
GA BRC37
UT WOS:000282341400009
ER
PT B
AU Ocola, LE
Li, H
Uprety, KK
Auciello, O
AF Ocola, L. E.
Li, Hao
Uprety, K. K.
Auciello, O.
BE Laudon, M
Romanowicz, B
Laird, DL
TI Enhanced Photocurrent in Transparent Lead Zirconate-Titanate Thin Film
Capacitors Under Sun Light Illumination
SO CLEAN TECHNOLOGY 2008: BIO ENERGY, RENEWABLES, GREEN BUILDING, SMART
GRID, STORAGE, AND WATER
LA English
DT Proceedings Paper
CT Clean Technology and Sustainable Industries Conference and Trade Show
CY JUN 01-05, 2008
CL Boston, MA
SP Clean Technol & Sustainable Ind Org, Greenberg Traurig LLP, Jackson Walker LLP, IDA Ireland, Opportunity Houston, Alston & Bird LLP, K & L Gates, Buchanan Ingersoll & Rooney PC, Foley & Larder, LLP, Pacific Crest Securities, RockPort Capital Partners, Finnegan, Henderson, Farabow, Garrett & Dunner, LLP, Lehman Brothers, Nano Sci & Technol Inst, TechConnect, Cleantechnol & Sustainable Ind Events, Adv Mat Technol Pte Ltd, Adv Technol Ventures, ASCOMP GmbH, BP, Ecointesy, Life Cycle Syst, Energy Recovery, Inc, Kauffman Innovat Network, Inc, Motorola, Inc, Novomer, Oak Ridge Natl Lab, Taylor & Francis Group LLC, CRC Press, Penn State Univ, GlobalSpec, AllConferences Com, Battery Power Prod & Technol, BioBasedNews, BioDzl Com, Business Wire, Business Week, CLEAN, Soil, Air, Water, Design2Market, Fuel Cell Magazine, Inside Greentech, KCI Investing, Nature, R&D Magazine, Red Herring, Inc, Sci Magazine, Journal BioLaw & Business JB&B, Real Nanotech Investor
ID ELECTRODES
AB (Pb)(Zr(0.52)Ti(0.48))O(3) films were fabricated on LaNiO(3) (LNO)/ In(2)O(3) 90%SnO(2)10% (ITO) layered transparent electrodes on glass substrates, using chemical solution deposition. The electrical and optical properties of transparent ITO/LNO/PZT/LNO/ITO capacitors fabricated on glass substrates were studied. The remnant polarization (P(r)) of the transparent ITO/LNO/PZT/LNO/ITO/glass capacitors was determined from P-E hysteresis loops measurements. Excellent optical transmittance was observed for the whole capacitor structure. The importance of a high performance transparent capacitor is that this structure may enable a new generation of high efficiency transparent electronic devices such as solar energy storage, photovoltaic, and intelligent windows, among others.
C1 [Ocola, L. E.; Li, Hao; Uprety, K. K.; Auciello, O.] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
RP Ocola, LE (reprint author), Argonne Natl Lab, Ctr Nanoscale Mat, 9700 S Cass Ave, Argonne, IL 60439 USA.
NR 13
TC 0
Z9 0
U1 1
U2 3
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4200-8502-0
PY 2008
BP 105
EP 108
PG 4
WC Energy & Fuels
SC Energy & Fuels
GA BRC37
UT WOS:000282341400028
ER
PT B
AU Wise, A
AF Wise, Alison
BE Laudon, M
Romanowicz, B
Laird, DL
TI Laying the Groundwork: Lessons Learned from the Telecommunications
Industry for Distributed Generation
SO CLEAN TECHNOLOGY 2008: BIO ENERGY, RENEWABLES, GREEN BUILDING, SMART
GRID, STORAGE, AND WATER
LA English
DT Proceedings Paper
CT Clean Technology and Sustainable Industries Conference and Trade Show
CY JUN 01-05, 2008
CL Boston, MA
SP Clean Technol & Sustainable Ind Org, Greenberg Traurig LLP, Jackson Walker LLP, IDA Ireland, Opportunity Houston, Alston & Bird LLP, K & L Gates, Buchanan Ingersoll & Rooney PC, Foley & Larder, LLP, Pacific Crest Securities, RockPort Capital Partners, Finnegan, Henderson, Farabow, Garrett & Dunner, LLP, Lehman Brothers, Nano Sci & Technol Inst, TechConnect, Cleantechnol & Sustainable Ind Events, Adv Mat Technol Pte Ltd, Adv Technol Ventures, ASCOMP GmbH, BP, Ecointesy, Life Cycle Syst, Energy Recovery, Inc, Kauffman Innovat Network, Inc, Motorola, Inc, Novomer, Oak Ridge Natl Lab, Taylor & Francis Group LLC, CRC Press, Penn State Univ, GlobalSpec, AllConferences Com, Battery Power Prod & Technol, BioBasedNews, BioDzl Com, Business Wire, Business Week, CLEAN, Soil, Air, Water, Design2Market, Fuel Cell Magazine, Inside Greentech, KCI Investing, Nature, R&D Magazine, Red Herring, Inc, Sci Magazine, Journal BioLaw & Business JB&B, Real Nanotech Investor
DE clean energy; market transformation; distributed generation;
telecommunications; public policy
AB The telecommunications industry went through growing pains in the past that hold some interesting lessons for the growing distributed generation (DG) "industry." The technology shifts and stakeholders involved with the historic market transformation of the telecommunications sector mirror similar factors involved in distributed generation today. An examination of these factors may inform best practices when approaching the conduits necessary to accelerate the shifting of our nation's energy system to cleaner forms of generation and use. From a technical perspective, the telecom industry in the 1990s saw a shift from highly centralized systems that had no capacity for adaptation to highly adaptive, distributed network systems. From a management perspective, the industry shifted from small, private-company structures to big, capital-intensive corporations. This presentation will explore potential correlation and outline the lessons that we can take away from this comparison.
C1 US DOE, Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Wise, A (reprint author), US DOE, Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA.
EM alison_wise@nrel.gov
NR 6
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4200-8502-0
PY 2008
BP 218
EP 221
PG 4
WC Energy & Fuels
SC Energy & Fuels
GA BRC37
UT WOS:000282341400057
ER
PT B
AU Fornasiero, F
Park, HG
Holt, JK
Stadermann, M
Kim, S
Bin In, J
Grigoropoulos, CP
Noy, A
Bakajin, O
AF Fornasiero, Francesco
Park, Hyung Gyu
Holt, Jason K.
Stadermann, Michael
Kim, Sangil
Bin In, Jung
Grigoropoulos, Costas P.
Noy, Aleksandr
Bakajin, Olgica
BE Laudon, M
Romanowicz, B
Laird, DL
TI Nanofiltration of Electrolyte Solutions by Sub-2nm Carbon Nanotube
Membranes
SO CLEAN TECHNOLOGY 2008: BIO ENERGY, RENEWABLES, GREEN BUILDING, SMART
GRID, STORAGE, AND WATER
LA English
DT Proceedings Paper
CT Clean Technology and Sustainable Industries Conference and Trade Show
CY JUN 01-05, 2008
CL Boston, MA
SP Clean Technol & Sustainable Ind Org, Greenberg Traurig LLP, Jackson Walker LLP, IDA Ireland, Opportunity Houston, Alston & Bird LLP, K & L Gates, Buchanan Ingersoll & Rooney PC, Foley & Larder, LLP, Pacific Crest Securities, RockPort Capital Partners, Finnegan, Henderson, Farabow, Garrett & Dunner, LLP, Lehman Brothers, Nano Sci & Technol Inst, TechConnect, Cleantechnol & Sustainable Ind Events, Adv Mat Technol Pte Ltd, Adv Technol Ventures, ASCOMP GmbH, BP, Ecointesy, Life Cycle Syst, Energy Recovery, Inc, Kauffman Innovat Network, Inc, Motorola, Inc, Novomer, Oak Ridge Natl Lab, Taylor & Francis Group LLC, CRC Press, Penn State Univ, GlobalSpec, AllConferences Com, Battery Power Prod & Technol, BioBasedNews, BioDzl Com, Business Wire, Business Week, CLEAN, Soil, Air, Water, Design2Market, Fuel Cell Magazine, Inside Greentech, KCI Investing, Nature, R&D Magazine, Red Herring, Inc, Sci Magazine, Journal BioLaw & Business JB&B, Real Nanotech Investor
DE carbon nanotube; membrane; ion exclusion; fast flow
ID WATER; TRANSPORT; GROWTH
AB Both MD simulations and experimental studies have shown that liquid and gas flow through carbon nanotubes with nanometer size diameter is exceptionally fast. For applications in separation technology, selectivity is required together with fast flow. In this work, we use pressure-driven filtration experiments to study ion exclusion in silicon nitride/sub-2-nm CNT composite membranes as a function of solution ionic strength, pH, and ion valence. We show that carbon nanotube membranes exhibit significant ion exclusion at low salt concentration. Our results support a rejection mechanism dominated by electrostatic interactions between fixed membrane charges and mobile ions, while steric and hydrodynamic effects appear to be less important. Comparison with commercial nanofiltration membranes for water softening reveals that our carbon nanotube membranes provides far superior water fluxes for similar ion rejection capabilities.
C1 [Fornasiero, Francesco; Park, Hyung Gyu; Holt, Jason K.; Stadermann, Michael; Noy, Aleksandr; Bakajin, Olgica] LLNL, Biosci & Biotechnol Div, CMELS, Livermore, CA 94550 USA.
RP Fornasiero, F (reprint author), LLNL, Biosci & Biotechnol Div, CMELS, Livermore, CA 94550 USA.
RI Stadermann, Michael /A-5936-2012; Fornasiero, Francesco/I-3802-2012
OI Stadermann, Michael /0000-0001-8920-3581;
NR 17
TC 0
Z9 0
U1 1
U2 7
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4200-8502-0
PY 2008
BP 380
EP 383
PG 4
WC Energy & Fuels
SC Energy & Fuels
GA BRC37
UT WOS:000282341400100
ER
PT B
AU Bogart, KHA
El-kady, I
Grubbs, RK
Rahimian, K
Sanchez, AM
Ellis, AR
Wiwi, M
McCormick, FB
Shir, DJL
Rogers, JA
AF Bogart, K. H. A.
El-kady, I.
Grubbs, R. K.
Rahimian, K.
Sanchez, A. M.
Ellis, A. R.
Wiwi, M.
McCormick, F. B.
Shir, D. J. -L.
Rogers, J. A.
BE Laudon, M
Romanowicz, B
Laird, DL
TI Simulation and Fabrication of Large-Area 3D Nanostructures
SO CLEAN TECHNOLOGY 2008: BIO ENERGY, RENEWABLES, GREEN BUILDING, SMART
GRID, STORAGE, AND WATER
LA English
DT Proceedings Paper
CT Clean Technology and Sustainable Industries Conference and Trade Show
CY JUN 01-05, 2008
CL Boston, MA
SP Clean Technol & Sustainable Ind Org, Greenberg Traurig LLP, Jackson Walker LLP, IDA Ireland, Opportunity Houston, Alston & Bird LLP, K & L Gates, Buchanan Ingersoll & Rooney PC, Foley & Larder, LLP, Pacific Crest Securities, RockPort Capital Partners, Finnegan, Henderson, Farabow, Garrett & Dunner, LLP, Lehman Brothers, Nano Sci & Technol Inst, TechConnect, Cleantechnol & Sustainable Ind Events, Adv Mat Technol Pte Ltd, Adv Technol Ventures, ASCOMP GmbH, BP, Ecointesy, Life Cycle Syst, Energy Recovery, Inc, Kauffman Innovat Network, Inc, Motorola, Inc, Novomer, Oak Ridge Natl Lab, Taylor & Francis Group LLC, CRC Press, Penn State Univ, GlobalSpec, AllConferences Com, Battery Power Prod & Technol, BioBasedNews, BioDzl Com, Business Wire, Business Week, CLEAN, Soil, Air, Water, Design2Market, Fuel Cell Magazine, Inside Greentech, KCI Investing, Nature, R&D Magazine, Red Herring, Inc, Sci Magazine, Journal BioLaw & Business JB&B, Real Nanotech Investor
DE nanostructure; lithography; quasicrystal; photonic; model
ID PHASE MASKS
AB Three-dimensional (3D) nano-structures are vital for emerging technologies such as photonics, sensors, fuel cells, catalyst supports, and data storage. The Proximity-field nanoPatterning(1) method generates complex 3D nanostructures using a single exposure through an elastomeric "phase mask" patterned in x, y, and z, and a single development cycle. We developed a model that predicts the phase mask required to generate a specific desired nanostructure. We have compared this inverse model with experimental 3D structures to test the validity of the simulation. We have transferred the PnP fabrication process to a class-10 commercial cleanroom and scaled-up the processed area to >2000mm(2), tested photopolymer additives designed to reduce resist shrinkage, incorporated atomic layer deposition (ALD) to coat the 3D patterned resist with metals/metal-oxides improve structure robustness, and generated quasi-crystal patterned 3D nanostructures.
C1 [Bogart, K. H. A.; El-kady, I.; Grubbs, R. K.; Rahimian, K.; Sanchez, A. M.; Ellis, A. R.; Wiwi, M.; McCormick, F. B.] Sandia Natl Labs, Livermore, CA 94550 USA.
RP Bogart, KHA (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA.
EM khbogar@sandia.gov
RI El-Kady, Ihab/D-2886-2013
OI El-Kady, Ihab/0000-0001-7417-9814
NR 9
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4200-8502-0
PY 2008
BP 624
EP 627
PG 4
WC Energy & Fuels
SC Energy & Fuels
GA BRC37
UT WOS:000282341400162
ER
PT J
AU Wang, Y
Notaro, M
Liu, Z
Gallimore, R
Levis, S
Kutzbach, JE
AF Wang, Y.
Notaro, M.
Liu, Z.
Gallimore, R.
Levis, S.
Kutzbach, J. E.
TI Detecting vegetation-precipitation feedbacks in mid-Holocene North
Africa from two climate models
SO CLIMATE OF THE PAST
LA English
DT Article
ID TERRESTRIAL ECOSYSTEM; ATLANTIC OSCILLATION; ABRUPT CHANGE; ATMOSPHERE;
HOLOCENE; SIMULATIONS; DROUGHT; MONSOON; SAHARA; VARIABILITY
AB Using two climate-vegetation model simulations from the Fast Ocean Atmosphere Model (FOAM) and the Community Climate System Model (CCSM, version 2), we investigate vegetation-precipitation feedbacks across North Africa during the mid-Holocene. From mid-Holocene snapshot runs of FOAM and CCSM2, we detect a negative feedback at the annual timescale with our statistical analysis. Using the Monte-Carlo bootstrap method, the annual negative feedback is further confirmed to be significant in both simulations. Additional analysis shows that this negative interaction is partially caused by the competition between evaporation and transpiration in North African grasslands. Furthermore, we find the feedbacks decrease with increasing timescales, and change signs from positive to negative at increasing timescales in FOAM. The proposed mechanism for this sign switch is associated with the different persistent timescales of upper and lower soil water contents, and their interactions with vegetation and atmospheric precipitation.
C1 [Wang, Y.; Notaro, M.; Liu, Z.; Gallimore, R.; Kutzbach, J. E.] Univ Wisconsin, Ctr Climate Res, Madison, WI 53706 USA.
[Levis, S.] Natl Ctr Atmospher Res, Boulder, CO 80307 USA.
RP Wang, Y (reprint author), Pacific NW Natl Lab, POB 999,MSIN K9-24, Richland, WA 99352 USA.
EM yi.wang@pnl.gov
RI Wang, Yi/F-2689-2011
FU ESH; NSF
FX This work has been supported by ESH/NSF. The CCSM2 and FOAMLPJ model
simulations have been carried out at NCAR computation resources. We also
would like to thank the two anonymous reviewers and H. Renssen whose
input helped to improve the paper. This paper is CCR Contribution Number
922.
NR 47
TC 21
Z9 22
U1 2
U2 8
PU COPERNICUS PUBLICATIONS
PI KATHLENBURG-LINDAU
PA MAX-PLANCK-STR 13, KATHLENBURG-LINDAU, 37191, GERMANY
SN 1814-9324
J9 CLIM PAST
JI Clim. Past.
PY 2008
VL 4
IS 1
BP 59
EP 67
PG 9
WC Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences
SC Geology; Meteorology & Atmospheric Sciences
GA 370JK
UT WOS:000260758300002
ER
PT J
AU Edmonds, J
Clarke, L
Lurz, J
Wise, M
AF Edmonds, J.
Clarke, L.
Lurz, J.
Wise, M.
TI Stabilizing CO2 concentrations with incomplete international cooperation
SO CLIMATE POLICY
LA English
DT Article
DE CO2; carbon pricing; cost-effectiveness; emissions reduction; regime
comparison; stabilization scenarios
AB Many stabilization scenarios have examined the implications of stabilization on the assumption that all regions and all sectors of all of the world's economies undertake emissions mitigations wherever and whenever it is cheapest to do so. This idealized assumption is just one of many ways in which emissions mitigation actions could play out globally, but not necessarily the most likely. This paper explores the implications of generic policy regimes that lead to stabilization of CO, concentrations under conditions in which non-Annex I regions delay emissions reductions and in which carbon prices vary across participating regions. The resulting stabilization scenarios are contrasted with the idealized results. Delays in the date by which non-Annex I regions begin to reduce emissions raise the price of carbon in Annex I regions relative to the price of carbon in Annex I in an idealized regime for any given CO2 concentration limit. This effect increases the longer the delay in non-Annex I accession, the lower the non-Annex I carbon prices relative to the Annex I prices, and the more stringent the stabilization level. The effect of delay is very pronounced when CO, concentrations are stabilized at 450 ppmv, however the effect is much less pronounced at 550 ppmv and above. For long delays in non-Annex I accession, 450 ppmv stabilization levels become infeasible.
C1 [Edmonds, J.; Clarke, L.; Lurz, J.; Wise, M.] Univ Maryland, Pacific NW Natl Lab, Joint Global Change Res Inst, College Pk, MD 20740 USA.
RP Edmonds, J (reprint author), Univ Maryland, Pacific NW Natl Lab, Joint Global Change Res Inst, 8400 Baltimore Ave,Suite 201, College Pk, MD 20740 USA.
EM jae@pnl.gov
NR 16
TC 37
Z9 37
U1 0
U2 5
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1469-3062
J9 CLIM POLICY
JI Clim. Policy
PY 2008
VL 8
IS 4
BP 355
EP 376
DI 10.3763/cpol.2007.0469
PG 22
WC Environmental Studies; Public Administration
SC Environmental Sciences & Ecology; Public Administration
GA 345HR
UT WOS:000258987600002
ER
PT J
AU Hillegonds, DJ
Voge, JS
Burton, DW
Yang, M
Vijayakumar, S
Herold, DA
Deftos, LJ
Fitzgerald, RL
AF Hillegonds, D. J.
Voge, J. S.
Burton, D. W.
Yang, M.
Vijayakumar, S.
Herold, D. A.
Deftos, L. J.
Fitzgerald, R. L.
TI Ca-41 provides a precise, non-invasive assay of tumor growth in bone
SO CLINICAL & EXPERIMENTAL METASTASIS
LA English
DT Meeting Abstract
C1 [Hillegonds, D. J.; Voge, J. S.] Lawrence Livermore Natl Lab, Livermore, CA USA.
[Burton, D. W.; Herold, D. A.; Deftos, L. J.; Fitzgerald, R. L.] UC San Diego, San Diego, CA USA.
[Yang, M.] AntiCancer Inc, San Diego, CA USA.
[Vijayakumar, S.] UC Davis Med Ctr, Sacramento, CA USA.
NR 0
TC 1
Z9 1
U1 0
U2 0
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0262-0898
J9 CLIN EXP METASTAS
JI Clin. Exp. Metastasis
PY 2008
VL 25
SU S
BP 54
EP 54
PG 1
WC Oncology
SC Oncology
GA 338GK
UT WOS:000258494200095
ER
PT J
AU Vlcek, L
Cummings, PT
AF Vlcek, Lukas
Cummings, Peter T.
TI Adsorption of water on TiO2 and SnO2 surfaces: Molecular dynamics study
SO COLLECTION OF CZECHOSLOVAK CHEMICAL COMMUNICATIONS
LA English
DT Article
DE adsorption; metal oxide; rutile; cassiterite; water; free energy;
chemical potential; simulation
ID ELECTRIC DOUBLE-LAYER; FORCE-FIELD PARAMETERS; FREE-ENERGY PROFILE;
RUTILE 110 SURFACE; INTERFACE; SYSTEMS; MODEL; NANOPARTICLES;
DISTRIBUTIONS; SIMULATIONS
AB The structure and thermodynamics of water adsorbed at the ( 110) surface of rutile (alpha-TiO2) and cassiterite (alpha-SnO2) were studied by means of molecular dynamics simulations with atomic interactions represented by a classical forcefield based on the SPC/ E model of water. To investigate the effect of surface water dissociation on the adsorption of additional layers of water, two extreme cases of completely hydroxylated and nonhydroxylated surfaces were considered. Axial density distributions and adsorption Helmholtz free energies of water for different types of surfaces were compared and related to thermal gravimetric analysis data from literature. We found that the dissociation of water in the first layer considerably changes the affinity of additional water to the surface, weakening hydrogen bonding between the first and second layer and strengthening cohesion between the second and third layer. Comparison with the experimental measurements of adsorption indicates that water dissociates on cassiterite while it stays associated on rutile. The degree of dissociation in the first layer is not strongly affected by the adsorption of additional water.
C1 [Vlcek, Lukas; Cummings, Peter T.] Vanderbilt Univ, Dept Chem Engn, Nashville, TN 37235 USA.
[Vlcek, Lukas] Acad Sci Czech Republic, Inst Chem Proc Fundamentals, CR-16502 Prague 6, Czech Republic.
[Cummings, Peter T.] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
RP Vlcek, L (reprint author), Vanderbilt Univ, Dept Chem Engn, 221 Kirkland Hall, Nashville, TN 37235 USA.
EM lukas.vlcek@vanderbilt.edu; peter.cummings@vanderbilt.edu
RI Cummings, Peter/B-8762-2013; Vlcek, Lukas/N-7090-2013
OI Cummings, Peter/0000-0002-9766-2216; Vlcek, Lukas/0000-0003-4782-7702
NR 31
TC 6
Z9 6
U1 0
U2 24
PU INST ORGANIC CHEM AND BIOCHEM
PI PRAGUE 6
PA ACAD SCI CZECH REPUBLIC, FLEMINGOVO NAM 2, PRAGUE 6 166 10, CZECH
REPUBLIC
SN 0010-0765
J9 COLLECT CZECH CHEM C
JI Collect. Czech. Chem. Commun.
PY 2008
VL 73
IS 4
BP 575
EP 589
DI 10.1135/cccc20080575
PG 15
WC Chemistry, Multidisciplinary
SC Chemistry
GA 313PV
UT WOS:000256753400009
ER
PT J
AU Williams, TC
Shaddix, CR
Schefer, RW
AF Williams, Timothy C.
Shaddix, Christopher R.
Schefer, Robert W.
TI Effect of syngas composition and CO2-diluted oxygen on performance of a
premixed swirl-stabilized combustor
SO COMBUSTION SCIENCE AND TECHNOLOGY
LA English
DT Article
DE carbon dioxide; carbon monoxide; NOx; premixed combustion; swirl; syngas
ID OPPOSED-FLOW DIFFUSION; NITRIC-OXIDE; FLAMES; HYDROGEN; GAS; AIR; CO2;
EMISSIONS; PRESSURE; POWER
AB Future energy systems based on gasification of coal or biomass for co-production of electrical power and fuels may require gas turbine operation on unusual gaseous fuel mixtures. In addition, global climate change concerns may dictate the generation of a CO2 product stream for end-use or sequestration, with potential impacts on the oxidizer used in the gas turbine. In this study the operation at atmospheric pressure of a small, optically accessible swirl-stabilized premixed combustor, burning fuels ranging from pure methane to conventional and H-2-rich and H-2-lean syngas mixtures is investigated. Both air and CO2-diluted oxygen are used as oxidizers. CO and NOx emissions for these flames have been determined from the lean blowout limit to slightly rich conditions (phi similar to 1.03). In practice, CO2-diluted oxygen systems will likely be operated close to stoichiometric conditions to minimize oxygen consumption while achieving acceptable NOx performance. The presence of hydrogen in the syngas fuel mixtures results in more compact, higher temperature flames, resulting in increased flame stability and higher NOx emissions. Consistent with previous experience, the stoichiometry of lean blowout decreases with increasing H-2 content in the syngas. Similarly, the lean stoichiometry at which CO emissions become significant decreases with increasing H-2 content. For the mixtures investigated, CO emissions near the stoichiometric point do not become significant until phi > 0.95. At this stoichiometric limit, CO emissions rise more rapidly for combustion in O-2-CO2 mixtures than for combustion in air.
C1 [Williams, Timothy C.; Shaddix, Christopher R.; Schefer, Robert W.] Sandia Natl Labs, Combust Res Facil, Livermore, CA 94550 USA.
RP Shaddix, CR (reprint author), Sandia Natl Labs, Combust Res Facil, Livermore, CA 94550 USA.
EM crshadd@sandia.gov
RI Schefer, Jurg/G-3960-2012
NR 36
TC 32
Z9 33
U1 2
U2 17
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 0010-2202
J9 COMBUST SCI TECHNOL
JI Combust. Sci. Technol.
PY 2008
VL 180
IS 1
BP 64
EP 88
DI 10.1080/00102200701487061
PG 25
WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary;
Engineering, Chemical
SC Thermodynamics; Energy & Fuels; Engineering
GA 241SM
UT WOS:000251676100004
ER
PT J
AU Casleton, KH
Breault, RW
Richards, GA
AF Casleton, Kent H.
Breault, Ronald W.
Richards, George A.
TI System issues and tradeoffs associated with syngas production and
combustion
SO COMBUSTION SCIENCE AND TECHNOLOGY
LA English
DT Review
DE carbon dioxide capture; gasification; syngas utilization
ID CHEMICAL-LOOPING-COMBUSTION; OXIDE FUEL-CELLS; GAS-TURBINE; NATURAL-GAS;
COAL SYNGAS; PREMIXED COMBUSTION; LABORATORY REACTOR; DIFFUSION FLAMES;
HYBRID CYCLE; GENERATION
AB The purpose of this article is to provide an overview of the basic technology of coal gasification for the production of syngas and the utilization of that syngas in power generation. The common gasifier types, fixed/moving bed, fluidized bed, entrained flow, and transport, are described, and accompanying typical product syngas compositions are shown for different coal ranks. Substantial variation in product gas composition is observed with changes in gasifier and coal feed type. Fuel contaminants such as sulfur, nitrogen, ash, as well as heavy metals such as mercury, arsenic, and selenium, can be removed to protect the environment and downstream processes. A variety of methods for syngas utilization for power production are discussed, including both present ( gas turbine and internal combustion engines) and future technologies, including oxy-fuel, chemical looping, fuel cells, and hybrids. Goals to improve system efficiencies, further reduce NOx emissions, and provide options for CO2 sequestration require advancements in many aspects of IGCC plants, including the combustion system. Areas for improvements in combustion technology that could minimize these tradeoffs between cost, complexity, and performance are discussed.
C1 [Casleton, Kent H.; Breault, Ronald W.; Richards, George A.] US DOE, Natl Energy Technol Lab, Morgantown, WV 26505 USA.
RP Richards, GA (reprint author), US DOE, Natl Energy Technol Lab, 3610 Collins Ferry Rd, Morgantown, WV 26505 USA.
EM George.Richards@netl.doe.gov
OI Breault, Ronald/0000-0002-5552-4050
NR 105
TC 24
Z9 24
U1 4
U2 27
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 0010-2202
J9 COMBUST SCI TECHNOL
JI Combust. Sci. Technol.
PY 2008
VL 180
IS 6
BP 1013
EP 1052
DI 10.1080/00102200801962872
PG 40
WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary;
Engineering, Chemical
SC Thermodynamics; Energy & Fuels; Engineering
GA 313VQ
UT WOS:000256768500002
ER
PT J
AU Malchi, JY
Yetter, RA
Foley, TJ
Son, SF
AF Malchi, J. Y.
Yetter, R. A.
Foley, T. J.
Son, S. F.
TI The effect of added Al(2)O(3) on the propagation behavior of an Al/CuO
nanoscale thermite
SO COMBUSTION SCIENCE AND TECHNOLOGY
LA English
DT Article
DE burning rate; diluent; nano-aluminum; thermite
ID COMBUSTION; COMPOSITES; DETONATION; NANO
AB Three types of experiments were performed on an Al/CuO nanoscale thermite to understand the effect of adding a diluent (40 nm Al(2)O(3) particles) to the mixture: the constant volume pressure cell, the unconfined burn tray, and the instrumented burn tube. The addition of Al(2)O(3) decreased the pressure output and reaction velocity in all three experiments. Burn tube measurements showed three reaction velocity regimes: constant velocity observed when 0% (633 m/s) and 5% (570 m/s) of the total weight is Al(2)O(3), constant acceleration observed at 10% (146 m/s to 544 m/s over a distance of 6 cm) and 15% (69 m/s to 112 m/s over a distance of 6 cm) Al(2)O(3), and an unstable, spiraling combustion wave at 20% Al(2)O(3). The pressure measurements correlated to these three regimes showing a dropoff in peak pressure as Al(2)O(3) was added to the system, with relatively no pressure increase observed when 20% of the total weight was Al(2)O(3). Equilibrium calculations showed that the addition of Al(2)O(3) to an Al/CuO mixture lowered the flame temperature, reducing the amount of combustion products in the gas phase, thus, hindering the presumed primary mode of forward heat transfer, convection.
C1 [Malchi, J. Y.; Yetter, R. A.] Penn State Univ, University Pk, PA 16802 USA.
[Foley, T. J.] Los Alamos Natl Lab, Los Alamos, NM USA.
[Son, S. F.] Purdue Univ, W Lafayette, IN 47907 USA.
RP Yetter, RA (reprint author), 111 Res Bldg E, University Pk, PA 16802 USA.
EM ray8@psu.edu
OI Son, Steven/0000-0001-7498-2922
NR 18
TC 30
Z9 30
U1 0
U2 21
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 0010-2202
J9 COMBUST SCI TECHNOL
JI Combust. Sci. Technol.
PY 2008
VL 180
IS 7
BP 1278
EP 1294
DI 10.1080/00102200802049471
PG 17
WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary;
Engineering, Chemical
SC Thermodynamics; Energy & Fuels; Engineering
GA 313VR
UT WOS:000256768600003
ER
PT J
AU Strelkova, MI
Kirillov, IA
Potapkin, BV
Safonov, AA
Sukhanov, LP
Umanskiy, SY
Deminsky, MA
Dean, AJ
Varatharajan, B
Tentner, AM
AF Strelkova, M. I.
Kirillov, I. A.
Potapkin, B. V.
Safonov, A. A.
Sukhanov, L. P.
Umanskiy, S. Ya.
Deminsky, M. A.
Dean, A. J.
Varatharajan, B.
Tentner, A. M.
TI Detailed and reduced mechanisms of Jet A combustion at high temperatures
SO COMBUSTION SCIENCE AND TECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 21st International Colloquium on the Dynamics of Explosions and Reactive
Systems
CY JUL 23-28, 2007
CL Poitiers, FRANCE
DE combustion; detailed and reduced kinetic mechanisms; detonation; Jet A
kerosene; modeling; surrogate
ID N-DECANE; OXIDATION; SURROGATE; KEROSENE; AVIATION; IGNITION; MIXTURES;
FLAMES; FUELS
AB For the Computational Fluid Dynamics (CFD) modeling of combustion and detonation of Jet A aviation fuel it is necessary to use the simplest kinetic mechanism that accurately describes the essential relevant phenomena. A surrogate that demonstrated good agreement with the parent fuel in the detonation process was chosen. A detailed kinetic mechanism was elaborated using a multilevel approach. A reduced mechanism was derived from the detailed mechanism for use in the CFD simulation of real detonation processes in combustors.
C1 [Strelkova, M. I.; Kirillov, I. A.; Potapkin, B. V.] RRC Kurchatov Inst, Moscow 123182, Russia.
[Safonov, A. A.; Sukhanov, L. P.; Umanskiy, S. Ya.; Deminsky, M. A.] Kintech Lab, Moscow, Russia.
[Dean, A. J.; Varatharajan, B.] GE Global Res, Niskayuna, NY USA.
[Tentner, A. M.] Argonne Natl Labs, Argonne, IL USA.
RP Strelkova, MI (reprint author), RRC Kurchatov Inst, Kurchatov Sq 1, Moscow 123182, Russia.
EM strelkova@hepti.kiae.ru
RI Sukhanov, Leonid/K-9701-2013
OI Sukhanov, Leonid/0000-0001-8599-8102
NR 26
TC 11
Z9 15
U1 0
U2 18
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 0010-2202
J9 COMBUST SCI TECHNOL
JI Combust. Sci. Technol.
PY 2008
VL 180
IS 10-11
BP 1788
EP 1802
DI 10.1080/00102200802258379
PG 15
WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary;
Engineering, Chemical
SC Thermodynamics; Energy & Fuels; Engineering
GA 356EF
UT WOS:000259760800007
ER
PT J
AU Risha, GA
Sabourin, JL
Yang, V
Yetter, RA
Son, SF
Tappan, BC
AF Risha, Grant A.
Sabourin, Justin L.
Yang, Vigor
Yetter, Richard A.
Son, Steven F.
Tappan, Bryce C.
TI COMBUSTION AND CONVERSION EFFICIENCY OF NANOALUMINUM-WATER MIXTURES
SO COMBUSTION SCIENCE AND TECHNOLOGY
LA English
DT Article
DE Aluminum; Burning rate; Combustion; Efficiency; Nanoparticles; Water
ID ULTRAFINE ALUMINUM
AB An experimental investigation on the combustion behavior and conversion efficiency of nanoaluminum and liquid water mixtures was conducted. Burning rates and chemical efficiency of aluminum-water and aluminum-water-poly(acrylamide-co-acrylic acid) mixtures were quantified as a function of pressure (from 0.12 to 15MPa), nominal aluminum particle size (for diameters of 38, 50, 80, and 130nm), and overall equivalence ratios (0.67 0.005 M DTPA + 1M ammonium bicarbonate > 0.01 M EDTA + 0.05M ammonium carbonate > 0.005 M DTPA > 1MMgCl(2). The critical limits of Zn in soil, below which the yield response to late sown wheat (var. UP-2338) to Zn application could be expected, were 0.57 mg 0.005M DTPA (pH 7.3) extractable and 1.72 mg Mehlich 3-extractable Zn kg(-1) soil. The critical limit of Zn in whole shoot at 60 days after emergence was found to be 26.1 mg Zn kg(-1) plant tissue. The DTPA and Mehlich 3-extractable soil Zn also correlated significantly and positively with Zn concentration in whole shoot at 60 days after emergence and total Zn uptake by wheat at harvest.
C1 [Srivastava, Prakash C.; Naresh, Megh; Srivastava, Prashant] GB Pant Univ Agr & Technol, Dept Soil Sci, Pantnagar, Uttar Pradesh, India.
[Srivastava, Prashant] Univ Georgia, Savannah River Ecol Lab, Aiken, SC 29801 USA.
RP Srivastava, PC (reprint author), 8-33 Monnomeeth St, Bexley, NSW 2207, Australia.
EM ps.soil@gmail.com
RI Srivastava, Prashant/E-6471-2011
OI Srivastava, Prashant/0000-0002-6234-3987
NR 10
TC 5
Z9 5
U1 0
U2 0
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 0010-3624
J9 COMMUN SOIL SCI PLAN
JI Commun. Soil Sci. Plant Anal.
PY 2008
VL 39
IS 3-4
BP 440
EP 449
DI 10.1080/00103620701826563
PG 10
WC Agronomy; Plant Sciences; Chemistry, Analytical; Soil Science
SC Agriculture; Plant Sciences; Chemistry
GA 261RA
UT WOS:000253096500010
ER
PT J
AU Srivastava, PC
Srivastava, P
AF Srivastava, Prakash C.
Srivastava, Prashant
TI Integration of soil pH with soil-test values of zinc for prediction of
yield response in rice grown in mollisols
SO COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS
LA English
DT Article
DE mollisols; rice; soil-test methods; zinc availability
ID CALIBRATION; DEFICIENCY
AB Seventeen Mollisols having pH((1:2)) in the range of 6.00 to 8.42 were analyzed with five extractants, and the extractable zinc (Zn) ranges were 0.84 to 2.75 mg Zn kg(-1) soil for diethylenetriaminepentaacetic acid (DTPA) (pH7.3), 0.91 to 2.72 mg Zn kg(-1) soil for DTPA + ammonium bicarbonate (pH7.6), 1.82 to 7.18 mg Zn kg(-1) soil for Mehlich 3, 1.22 to 3.83 mg Zn kg(-1) soil for ethylenediaminetetraacetic acid (EDTA) + ammonium carbonate, and 0.88 to 1.18 mg Zn kg(-1) soil for 1mol L(-1) magnesium chloride (MgCl(2)) (pH6.0). Zinc extracted by DTPA (pH7.3) and Mehlich 3 showed significant positive correlation with sand content, whereas only Mehlich 3 showed negative correlation with soil pH. All extractants showed significant positive correlation with each other except for 1mol L(-1) MgCl(2)-extractable Zn, which had significant positive correlation with only Mehlich 3- and EDTA + ammonium carbonate-extractable Zn. A greenhouse experiment showed that Bray's percentage yield of rice was poorly correlated to extractable soil Zn but had a significant and negative linear correlation with soil pH (r = -0.662, significant at p = 0.01). Total Zn uptake by rice had a significant positive correlation with 1mol L(-1) MgCl(2)- and Mehlich 3-extractable Zn. A proposed parameter (p extractable Zn + p OH(-)) involving both soil extractable Zn and pH terms together showed significant and positive correlation with Bray's percentage yield and total Zn uptake of rice. The calculated values of critical limits of soil Zn in terms of the proposed parameter were 14.1699 for DTPA (pH7.3), 13.9587 for DTPA + ammonium bicarbonate, 13.7016 for Mehlich 3, 13.9402 for EDTA + ammonium carbonate, and 14.1810 for 1mol L(-1) MgCl(2) (pH6.0). The critical limits of Zn in rice grain and straw were 17.32 and 22.95 mg Zn kg(-1) plant tissue, respectively.
C1 [Srivastava, Prakash C.; Srivastava, Prashant] GB Pant Univ Agr & Technol, Dept Soil Sci, Pantnagar, Uttar Pradesh, India.
[Srivastava, Prashant] Univ Georgia, Savannah River Ecol Lab, Aiken, SC USA.
RP Srivastava, P (reprint author), 8-33 Monomeeth St, Bexley, NSW 2207, Australia.
EM ps.soil@gmail.com
RI Srivastava, Prashant/E-6471-2011
OI Srivastava, Prashant/0000-0002-6234-3987
NR 19
TC 5
Z9 5
U1 0
U2 3
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 0010-3624
J9 COMMUN SOIL SCI PLAN
JI Commun. Soil Sci. Plant Anal.
PY 2008
VL 39
IS 15-16
BP 2456
EP 2468
DI 10.1080/00103620802292830
PG 13
WC Agronomy; Plant Sciences; Chemistry, Analytical; Soil Science
SC Agriculture; Plant Sciences; Chemistry
GA 341BF
UT WOS:000258688500018
ER
PT J
AU Garten, CT
AF Garten, Charles T., Jr.
TI Changes in Carbon following Forest Soil Transplants along an Altitudinal
Gradient
SO COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS
LA English
DT Article
DE Climate change; elevation gradient; soil carbon; soil C-to-N ratio;
warming
ID SOUTHERN APPALACHIAN MOUNTAINS; ORGANIC-MATTER; CLIMATE-CHANGE; N RATIO;
DECOMPOSITION; TEMPERATURE; NITROGEN; RATES; MINERALIZATION; ECOSYSTEMS
AB Using a simple case study approach, this research tested the hypothesis that soil organic carbon (C) concentrations would decline when mineral soils from cool, nitrogen (N)-rich, high-elevation (1400m) forests were transplanted to warmer, N-poor, low-elevation (545m) forests. Two short-term (5 year) experiments were performed in the Great Smoky Mountains National Park (Tenn./N.C.) in the southern Appalachian Mountains. In the first experiment, C concentrations in whole soils, particulate organic matter (POM), and mineral-associated organic matter (MOM) declined significantly (P 0.001) when soils from a high elevation site (1H) were transplanted to a low-elevation site (1L). In the second experiment, there was a significant (P 0.05) decline in POM C concentrations when high elevation soils (2H) were moved to a lower elevation (2L) as well as declines in whole soil C concentrations that were significant at P 0.10. In both cases, reciprocal transplants of low elevation soils to high elevations resulted in no detectable change in soil C concentrations. Warming of higher quality soil organic matter (whole soil C-to-N ratio 20) resulted in greater soil C loss. Consistent with prior predictions, the results suggest that a future warmer and drier climate may cause losses of forest soil C at high elevations in the southern Appalachian Mountains.
C1 Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
RP Garten, CT (reprint author), Oak Ridge Natl Lab, Div Environm Sci, POB 2008,Mail Stop 6036, Oak Ridge, TN 37831 USA.
EM gartenctjr@ornl.gov
FU U. S. Department of Energy; Office of Science, Biological and
Environmental Research/Terrestrial Carbon [DE-AC05-00OR22725]; Oak Ridge
National Laboratory (ORNL)
FX This research was sponsored by the U. S. Department of Energy, Office of
Science, Biological and Environmental Research/Terrestrial Carbon
Processes Program under contract DE-AC05-00OR22725 with Oak Ridge
National Laboratory (ORNL), managed by UT-Battelle, LLC. I thank Bonnie
Lu ( retired) and Deanne Brice ( ORNL) for their valuable technical
assistance. The submitted manuscript has been authored by a contractor
of the U. S. government under contract DE-AC05-00OR22725. Accordingly,
the U. S. government retains a nonexclusive, royalty-free license to
publish or reproduce the published form of this contribution, or to
allow others to do so, for U. S. government purposes.
NR 24
TC 2
Z9 2
U1 0
U2 2
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 0010-3624
J9 COMMUN SOIL SCI PLAN
JI Commun. Soil Sci. Plant Anal.
PY 2008
VL 39
IS 19-20
BP 2883
EP 2893
AR PII 905632376
DI 10.1080/00103620802432808
PG 11
WC Agronomy; Plant Sciences; Chemistry, Analytical; Soil Science
SC Agriculture; Plant Sciences; Chemistry
GA 374BS
UT WOS:000261017900008
ER
PT J
AU Burr, T
Fry, H
McVey, B
Sander, E
Cavanaugh, J
Neath, A
AF Burr, Tom
Fry, Herb
McVey, Brian
Sander, Eric
Cavanaugh, Joseph
Neath, Andrew
TI Performance of variable selection methods in regression using variations
of the Bayesian information criterion
SO COMMUNICATIONS IN STATISTICS-SIMULATION AND COMPUTATION
LA English
DT Article
DE approximate Bayesian posterior probabilities; Bayesian information
criterion (BIC); image analysis; variable selection
ID MODELS
AB The Bayesian information criterion (BIC) is widely used for variable selection. We focus on the regression setting for which variations of the BIC have been proposed. A version that includes the Fisher Information matrix of the predictor variables performed best in one published study. In this article, we extend the evaluation, introduce a performance measure involving how closely posterior probabilities are approximated, and conclude that the version that includes the Fisher Information often favors regression models having more predictors, depending on the scale and correlation structure of the predictor matrix. In the image analysis application that we describe, we therefore prefer the standard BIC approximation because of its relative simplicity and competitive performance at approximating the true posterior probabilities.
C1 [Burr, Tom] Los Alamos Natl Lab, Stat Sci Grp, Los Alamos, NM 87545 USA.
[Fry, Herb; McVey, Brian] Los Alamos Natl Lab, Phys Chem & Appl Spect Grp, Los Alamos, NM USA.
[Sander, Eric] Natl Nucl Secur Adm, Off Def Nucl Nonproliferat, Washington, DC USA.
[Cavanaugh, Joseph] Univ Iowa, Coll Publ Hlth, Dept Biostat, Iowa City, IA USA.
[Neath, Andrew] So Illinois Univ, Dept Math & Stat, Edwardsville, IL 62026 USA.
RP Burr, T (reprint author), Los Alamos Natl Lab, Stat Sci Grp, Los Alamos, NM 87545 USA.
EM tburr@lanl.gov
NR 19
TC 7
Z9 7
U1 2
U2 5
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 0361-0918
J9 COMMUN STAT-SIMUL C
JI Commun. Stat.-Simul. Comput.
PY 2008
VL 37
IS 3
BP 507
EP 520
DI 10.1080/03610910701812428
PG 14
WC Statistics & Probability
SC Mathematics
GA 308JU
UT WOS:000256386500005
ER
PT B
AU Silverman, MJ
AF Silverman, M. Joshua
BE Pursell, C
TI Nuclear Technology
SO COMPANION TO AMERICAN TECHNOLOGY
LA English
DT Article; Book Chapter
C1 [Silverman, M. Joshua] US DOE, Off Environm Safety & Hlth, Washington, DC 20585 USA.
RP Silverman, MJ (reprint author), US DOE, Off Environm Safety & Hlth, Washington, DC 20585 USA.
NR 37
TC 0
Z9 0
U1 0
U2 0
PU BLACKWELL SCIENCE PUBL
PI OXFORD
PA OSNEY MEAD, OXFORD OX2 0EL, ENGLAND
BN 978-0-47069-608-8
PY 2008
BP 298
EP 320
DI 10.1002/9780470696088.ch16
D2 10.1002/9780470696088
PG 23
WC History
SC History
GA BYG11
UT WOS:000298541700017
ER
PT J
AU Adib, P
Hurlbut, D
AF Adib, Parviz
Hurlbut, David
BE Sioshansi, FP
TI Market Power and Market Monitoring
SO COMPETITIVE ELECTRICITY MARKETS: DESIGN, IMPLEMENTATION, PERFORMANCE
LA English
DT Article; Book Chapter
ID COMPETITION
AB Competitive electricity markets are prone to abuse of market power by dominant generators or firms with strategic assets under a number of circumstances. Experience suggests that when these conditions are present and a vigilant watchdog is absent, firms may be tempted to exercise their market power to manipulate prices in a number of ways, harming consumers and other market participants in the process. This chapter provides an overview of how market power can be exercised and how effective market monitoring can prevent abusing practices.
C1 [Adib, Parviz] Automated Power Exchange, Santa Clara, CA USA.
[Hurlbut, David] Natl Renewable Energy Lab, Golden, CO USA.
RP Adib, P (reprint author), Automated Power Exchange, Santa Clara, CA USA.
NR 21
TC 1
Z9 1
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
BN 978-0-08-055771-7
PY 2008
BP 267
EP 296
DI 10.1016/B978-008047172-3.50011-8
PG 30
WC Economics; Environmental Studies
SC Business & Economics; Environmental Sciences & Ecology
GA BEM94
UT WOS:000317415300010
ER
PT J
AU Haas, R
Meyer, NI
Held, A
Finon, D
Lorenzoni, A
Wiser, R
Nishio, KI
AF Haas, Reinhard
Meyer, Niels I.
Held, Anne
Finon, Dominique
Lorenzoni, Arturo
Wiser, Ryan
Nishio, Ken-Ichiro
BE Sioshansi, FP
TI Promoting Electricity from Renewable Energy Sources - Lessons Learned
from the EU, United States, and Japan
SO COMPETITIVE ELECTRICITY MARKETS: DESIGN, IMPLEMENTATION, PERFORMANCE
LA English
DT Article; Book Chapter
ID PORTFOLIO STANDARD
AB The promotion of electricity generated from renewable energy sources (RES) has recently gained high priority in the energy policy strategies of many countries in response to concerns about global climate change, energy security, and other reasons. This chapter compares and contrasts the experience of a number of countries in Europe, states in the United States as well as Japan in promoting RES, identifying what appear to be the most successful policy measures.
C1 [Haas, Reinhard] Vienna Univ Technol, Energy Econ Grp, A-1040 Vienna, Austria.
[Meyer, Niels I.] Tech Univ Denmark, BYG, DK-2800 Lyngby, Denmark.
[Held, Anne] Fraunhofer Inst Syst & Innovat Res, Karlsruhe, Germany.
[Finon, Dominique] CIRED, Nogent Sur Marne, France.
[Lorenzoni, Arturo] Bocconi Univ, IEFE, Milan, Italy.
[Wiser, Ryan] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Nishio, Ken-Ichiro] Cent Res Inst Elect Power Ind, Tokyo 201, Japan.
RP Haas, R (reprint author), Vienna Univ Technol, Energy Econ Grp, A-1040 Vienna, Austria.
OI Lorenzoni, Arturo/0000-0002-4935-8236
NR 39
TC 12
Z9 12
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
BN 978-0-08-055771-7
PY 2008
BP 419
EP 468
DI 10.1016/B978-008047172-3.50016-7
PG 50
WC Economics; Environmental Studies
SC Business & Economics; Environmental Sciences & Ecology
GA BEM94
UT WOS:000317415300015
ER
PT S
AU Grest, GS
in't Veld, PJ
Lechman, JB
AF Grest, Gary S.
in't Veld, Pieter J.
Lechman, Jeremy B.
BE Tokuyama, M
Oppenheim, I
Nishiyama, H
TI Molecular simulations of nanoparticles in an explicit solvent
SO COMPLEX SYSTEMS-BOOK 1
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 5th International Workshop on Complex Systems
CY SEP 25-28, 2007
CL Sendai, JAPAN
DE nanoparticle; rheology; simulations; suspensions
ID DYNAMICS SIMULATION; POLYMER-NANOCOMPOSITE; STOKESIAN DYNAMICS;
CONCENTRATED COLLOIDS; BROWNIAN DYNAMICS; PARTICLE MODEL; RHEOLOGY;
SUSPENSIONS
AB Results of large scale equilibrium and non-equilibrium molecular dynamics (NEMD) simulations are presented for nanoparticles in an explicit solvent. The nanoparticles are: modeled as a uniform distribution of Lennard-Jones particles, while the solvent is represented by standard Lennard-Jones particles. Unlike hard sphere models, the nanoparticles and solvent do not phase separate for disparate sizes of nanoparticles and solvent, which allows us to study the static and dynamic properties of nanoparticle suspensions with an explicit solvent. Here we present results for nanoparticles of size 5 to 20 times that of the solvent for a range of concentrations from 7 to 40% volume fraction. The nanoparticles are found to segregate to the liquid/vapor interface or repel the interface depending on the relative strength of the nanoparticle/nanoparticle and nanoparticle/solvent interactions. Results from NEMD simulations suggest that the shear rheology of the suspension depends only on the nanoparticle concentration not the size of the nanoparticle, even for nanoparticles as small as 5 times that of the solvent.
C1 [Grest, Gary S.; in't Veld, Pieter J.; Lechman, Jeremy B.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Grest, GS (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
NR 42
TC 1
Z9 1
U1 2
U2 9
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0501-1
J9 AIP CONF PROC
PY 2008
VL 982
BP 304
EP 311
PG 8
WC Nanoscience & Nanotechnology; Mechanics; Physics, Applied; Polymer
Science
SC Science & Technology - Other Topics; Mechanics; Physics; Polymer Science
GA BHK30
UT WOS:000253834300052
ER
PT S
AU Uchida, N
Grest, GS
Everaers, R
AF Uchida, N.
Grest, Gary S.
Everaers, Ralf
BE Tokuyama, M
Oppenheim, I
Nishiyama, H
TI Viscoelasticity of entangled semiflexible polymers via primitive path
analysis
SO COMPLEX SYSTEMS-BOOK 1
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 5th International Workshop on Complex Systems
CY SEP 25-28, 2007
CL Sendai, JAPAN
DE Brownian dynamics; molecular dynamics; rheology; scaling theory;
semiflexible polymers
ID LIQUIDS
AB Viscoelasticity of entangled semiflexible polymers in the plateau frequency regime is investigated. We combine computer simulations and scaling arguments to develop a unified view of polymer entanglement based on primitive path analysis. The plateau modulus is obtained as a function of the dimensionless segment density. Our theoretical and numerical results agree well with the experimental data over a wide range of stiffness/density.
C1 [Uchida, N.] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan.
[Grest, Gary S.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Everaers, Ralf] Ecole Normale Super Lyon, Phys Lab, F-69364 Lyon, France.
RP Uchida, N (reprint author), Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan.
RI Everaers, Ralf/K-2228-2013
OI Everaers, Ralf/0000-0002-6843-2753
FU Japan's Ministry of Education, Culture, Sports, Science and Technology;
United States department of Energy's National Nuclear Security
Administration [de-AC04-94AL85000]
FX We acknowledge helpful discussions with K. Kremer and C. Svaneborg as
well as help from S. Sukumaran in the conversion of the exprimental data
to the dimensionaless form in Fig. 1. NU acknowledges financial support
by Grand-in-Aid for Scientific Research from Japan's Ministry of
Education, Culture, Sports, Science and Technology, and the hospitality
of the Max-Planck-Institute for Polymer Research in Mainz where we
started to develop the simulation code. Sandia is a multiprogram
laboratory operated by Sandia Corporation, a Lockheed Martin Company,
for the United States department of Energy's National Nuclear Security
Administration under contract de-AC04-94AL85000.
NR 9
TC 0
Z9 0
U1 1
U2 7
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0501-1
J9 AIP CONF PROC
PY 2008
VL 982
BP 536
EP +
PG 2
WC Nanoscience & Nanotechnology; Mechanics; Physics, Applied; Polymer
Science
SC Science & Technology - Other Topics; Mechanics; Physics; Polymer Science
GA BHK30
UT WOS:000253834300099
ER
PT J
AU Pedersen, PS
AF Pedersen, Paul S.
TI An algebraic approach to solving boundary value problems
SO COMPLEX VARIABLES AND ELLIPTIC EQUATIONS
LA English
DT Article
DE boundary value problem; commutative algebra; Clifford analysis; residue
class ring
AB Let P(y(1),..., y(n)), Q(y(1),..., y(n)) be polynomials in R[y(1),..., y(n)] and let Q = Z(Q(y(1),..., y(n))) = {(r(1),..., r(n)) is an element of R(n) |Q(r(1),..., r(n) ) = 0} be the real algebraic set associated with Q(y(1),..., y(n)) and let (Q) over cap be a compact subset of the algebraic set Q. We describe an algebraic approach for solving the general boundary value problem (BVP): given partial differential equation (PDE) P((partial derivative/partial derivative x(1),..., (partial derivative/partial derivative x(n))) and a continuous function q : (Q) over cap -> R, find u(x(1),..., x(n)) is an element of R[[x(1),..., x(n)]] so that
P(partial derivative/partial derivative x(1),..., partial derivative/partial derivative x(n))u(x(1),..., x(n)) = 0 and u(x(1),..., x(n))|(Q) over cap = q.
We will show how the general technique applies in the case that P(y) is a homogeneous polynomial of degree deg(P(y)) and Q(y) =P(y) + (P) over cap (y), where (P) over cap (y) is a polynomial having deg((P) over cap (y)) < deg(P(y)) and prove that the solution is unique in this case. This article brings together ideas from partial differential equations, a generalization of the theory of functions of a complex variable and the theory of commutative algebras.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Pedersen, PS (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
EM pedersen@lanl.gov
NR 12
TC 0
Z9 0
U1 0
U2 1
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1747-6933
J9 COMPLEX VAR ELLIPTIC
JI Complex Var. Elliptic Equ.
PY 2008
VL 53
IS 9
BP 803
EP 816
DI 10.1080/17476930802045812
PG 14
WC Mathematics
SC Mathematics
GA V12JT
UT WOS:000207596200001
ER
PT J
AU Jones, RW
Ng, Y
McClelland, JF
AF Jones, Roger W.
Ng, Yeow
McClelland, John F.
TI Monitoring ambient-temperature aging of a carbon-fiber/epoxy composite
prepreg with photoacoustic spectroscopy
SO COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
LA English
DT Article
DE prepreg; environmental degradation; chemical analysis; prepreg out-time
ID EPOXY PREPREG; TACK
AB Carbon-fiber/epoxy prepreg sheet was aged at room temperature under low humidity for up to 60 days. At various times during the aging, intact prepreg specimens were analyzed by infrared photoacoustic spectroscopy and laminates were made from the prepreg and tested for interlaminar shear strength. Over the 60 days, the spectra showed small but quantitative changes, but the shear strengths decreased by less than their uncertainty. Partial least squares modeling of the spectra allowed both the prepreg age and the shear strength to be determined from the prepreg spectra. The standard errors of cross-validation for the partial least squares models were 1.47 days for prepreg age and 1.4 MPa for interlaminar shear strength of the resulting laminates. (c) 2008 Elsevier Ltd. All rights reserved.
C1 [Jones, Roger W.; McClelland, John F.] Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
[Ng, Yeow] Wichita State Univ, Natl Inst Aviat Res, Natl Ctr Adv Mat Performance, Wichita, KS 67260 USA.
RP Jones, RW (reprint author), Iowa State Univ, Ames Lab, 109 Spedding Hall, Ames, IA 50011 USA.
EM jonesrw@ameslab.gov
NR 24
TC 16
Z9 17
U1 0
U2 8
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 1359-835X
J9 COMPOS PART A-APPL S
JI Compos. Pt. A-Appl. Sci. Manuf.
PY 2008
VL 39
IS 6
BP 965
EP 971
DI 10.1016/j.compositesa.2008.03.015
PG 7
WC Engineering, Manufacturing; Materials Science, Composites
SC Engineering; Materials Science
GA 317IZ
UT WOS:000257014700006
ER
PT S
AU Kawano, T
Chadwick, MB
Talou, P
Young, PG
Bonneau, L
AF Kawano, T.
Chadwick, M. B.
Talou, P.
Young, P. G.
Bonneau, L.
BA Escher, J
BF Escher, J
BE Dietrich, FS
Kawano, T
Thompson, IJ
TI Nuclear reaction data for nuclear technologies and applications
SO COMPOUND-NUCLEAR REACTIONS AND RELATED TOPICS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Workshop on Compound-Nuclear Reactions and Related Topics
CY OCT 22-26, 2007
CL Oakhurst, CA
SP N Div Lawrence Livermore Natl Lab, Theoret Div Los Alamos Natl Lab
DE nuclear data; fission; radiative capture; astrophysics
ID RADIATIVE-CAPTURE; STATISTICAL-THEORY; CROSS-SECTIONS; MULTISTEP
COMPOUND; NEUTRON-CAPTURE; GRIFFIN MODEL; DATA LIBRARY; SEMI-DIRECT;
DEPENDENCE; JENDL-3.3
AB We discuss how nuclear reaction theories and experimental data are utilized in many different application fields. The neutron-induced compound nuclear reactions, which take place from the sub-eV energy range up to tens of MeV, are the most important mechanisms to analyze the experimental data, to predict unknown reaction cross sections, to evaluate the nuclear data for databases, and to reduce the uncertainties. Improvement of predictive-power of nuclear reaction theories still requires further development of compound nuclear reaction theories for fission and radiative capture processes, since these reaction cross sections are especially important for nuclear science and technologies. An acceptable accuracy of these cross-sections has been achieved only if they were experimentally confirmed.
C1 [Kawano, T.; Talou, P.; Young, P. G.] Los Alamos Natl Lab, Nucl Phys T 16, Los Alamos, NM 87545 USA.
[Chadwick, M. B.] Los Alamos Natl Lab, Appl Phys X 1, Los Alamos, NM 87545 USA.
[Bonneau, L.] CEN Bordeaux Gradignan, F-33175 Gradignan, France.
RP Kawano, T (reprint author), Los Alamos Natl Lab, Nucl Phys T 16, Los Alamos, NM 87545 USA.
FU National Nuclear Security Administration of the U.S. Department of
Energy at Los Alamos National Laboratory [DE-AC52-06NA25396]
FX This work was carried out under the auspices of the National Nuclear
Security Administration of the U.S. Department of Energy at Los Alamos
National Laboratory under Contract No. DE-AC52-06NA25396.
NR 45
TC 0
Z9 0
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0524-0
J9 AIP CONF PROC
PY 2008
VL 1005
BP 17
EP +
PG 3
WC Physics, Nuclear
SC Physics
GA BHR38
UT WOS:000255660900003
ER
PT S
AU Firestone, RB
Krticka, M
McNabb, DP
Sleaford, B
Agvaanluvsan, U
Belgya, T
Revay, Z
AF Firestone, R. B.
Krticka, M.
McNabb, D. P.
Sleaford, B.
Agvaanluvsan, U.
Belgya, T.
Revay, Zs.
BA Escher, J
BF Escher, J
BE Dietrich, FS
Kawano, T
Thompson, IJ
TI New methods for the determination of total radiative thermal neutron
capture cross sections
SO COMPOUND-NUCLEAR REACTIONS AND RELATED TOPICS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Workshop on Compound-Nuclear Reactions and Related Topics
CY OCT 22-26, 2007
CL Oakhurst, CA
SP N Div Lawrence Livermore Natl Lab, Theoret Div Los Alamos Natl Lab
DE total thermal radiative neutron capture cross sections; statistical
model calculations
AB Precise gamma-ray thermal neutron capture cross sections have been measured at the Budapest Reactor for all elements with Z=1-83,92 except for He and Pm. These measurements and additional data from the literature been compiled to generate the Evaluated Gamma-ray Activation File (EGAF), which is disseminated by LBNL and the IAEA. These data are nearly complete for most isotopes with Z < 20 so the total radiative thermal neutron capture cross sections can be determined directly from the decay scheme. For light isotopes agreement with the recommended values is generally satisfactory although large discrepancies exist for B-11, C-12,C-13, N-15, Si-28,Si-30, S-34, Cl-37, and K-40,K-41. Neutron capture decay data for heavier isotopes are typically incomplete due to the contribution of unresolved continuum transitions so only partial radiative thermal neutron capture cross sections can be determined. The contribution of the continuum to the neutron capture decay scheme arises from a large number of unresolved levels and transitions and can be calculated by assuming that the fluctuations in level densities and transition probabilities are statistical. We have calculated the continuum contribution to neutron capture decay for the palladium isotopes with the Monte Carlo code DICEBOX. These calculations were normalized to the experimental cross sections deexciting low excitation levels to determine the total radiative thermal neutron capture cross section. The resulting palladium cross sections values were determined with a precision comparable to the recommended values even when only one gamma-ray cross section was measured. The calculated and experimental level feedings could also be compared to determine spin and parity assignments for low-lying levels.
C1 [Firestone, R. B.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Krticka, M.] Charles Univ Prague, Fac Math & Phys, CZ-18000 Prague 8, Czech Republic.
[Krticka, M.] North Carolina State Univ, Raleigh, NC 27695 USA.
[McNabb, D. P.; Sleaford, B.; Agvaanluvsan, U.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
[Belgya, T.; Revay, Zs.] Inst Isotopes & Surface Chem, H-1525 Budapest, Hungary.
RP Firestone, RB (reprint author), Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
OI Firestone, Richard/0000-0003-3833-5546
FU U.S. Department of Energy by the University of California; Office of
Science, Office of Basic Energy Sciences, of the U.S. Department of
Energy at Lawrence Berkeley National Laboratory [DE-AC02-05CH11231];
Lawrence Livermore National Laboratory [W-7405-Eng-48]; National Nuclear
Security Administration Academic Alliance [DEFG52-06NA26194]; research
plan MSM [002162 0859]
FX This work was performed under the auspices of the U.S. Department of
Energy by the University of California, supported by the Director,
Office of Science, Office of Basic Energy Sciences, of the U.S.
Department of Energy at Lawrence Berkeley National Laboratory under
Contract No. DE-AC02-05CH11231 and at Lawrence Livermore National
Laboratory under Contract W-7405-Eng-48. Support was also provided by
National Nuclear Security Administration Academic Alliance grant No.
DEFG52-06NA26194, and by the research plan MSM 002162 0859 supplied by
the Ministry of Education of the Czech Republic.
NR 17
TC 6
Z9 6
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0524-0
J9 AIP CONF PROC
PY 2008
VL 1005
BP 26
EP +
PG 2
WC Physics, Nuclear
SC Physics
GA BHR38
UT WOS:000255660900004
ER
PT S
AU Jandel, M
Bredeweg, TA
Bond, EM
Chadwick, MB
Clement, RR
Couture, A
O'Donnell, JM
Haight, RC
Reifarth, R
Rundberg, RS
Ullmann, JL
Vieira, DJ
Wilhelmy, JB
Wouters, JM
Macri, RA
Wu, CY
Becker, JA
AF Jandel, M.
Bredeweg, T. A.
Bond, E. M.
Chadwick, M. B.
Clement, R. R.
Couture, A.
O'Donnell, J. M.
Haight, R. C.
Reifarth, R.
Rundberg, R. S.
Ullmann, J. L.
Vieira, D. J.
Wilhelmy, J. B.
Wouters, J. M.
Macri, R. A.
Wu, C. Y.
Becker, J. A.
BA Escher, J
BF Escher, J
BE Dietrich, FS
Kawano, T
Thompson, IJ
TI Am-241(n,gamma) cross section in the neutron energy region between 0.02
eV and 300 keV
SO COMPOUND-NUCLEAR REACTIONS AND RELATED TOPICS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Workshop on Compound-Nuclear Reactions and Related Topics
CY OCT 22-26, 2007
CL Oakhurst, CA
SP N Div Lawrence Livermore Natl Lab, Theoret Div Los Alamos Natl Lab
DE americium-241; radiative capture cross section; capture gamma-ray
calorimetry
ID LUJAN-CENTER; CAPTURE; AM-241; JENDL-3.3; DETECTOR
AB The Detector for Advanced Neutron Capture Experiments (DANCE) at Los Alamos National Laboratory (LANL) was used for a neutron capture cross section measurement on Am-241. The high granularity of the DANCE array (160 BaF2 detectors in a 4 pi geometry) enables an efficient detection of prompt gamma rays following neutron capture. The preliminary results on the Am-241(n,gamma) cross section are presented from 0.02 eV to 300 keV. The cross section at thermal energy E-n = 0.0253eV was determined to be 665 +/- 33 bams. Resonance parameters were obtained using the SAMMY7 fit to the measured cross section in the resonance region. Significant discrepancies were found between our results and data evaluations for the first three lowest lying resonances. The cross section for neutrons with E-n > 1 keV agrees well with the ENDF/B-VII.0 and JENDL-3.3 evaluations.
C1 [Jandel, M.; Bredeweg, T. A.; Bond, E. M.; Chadwick, M. B.; Clement, R. R.; Couture, A.; O'Donnell, J. M.; Haight, R. C.; Reifarth, R.; Rundberg, R. S.; Ullmann, J. L.; Vieira, D. J.; Wilhelmy, J. B.; Wouters, J. M.] Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
[Macri, R. A.; Wu, C. Y.; Becker, J. A.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Jandel, M (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
FU U.S. Department of Energy at Los Alamos National Laboratory by the Los
Alamos National Security, LLC [DE-AC52-06NA25396]; Lawrence Livermore
National Laboratory by the Lawrence Livermore National Security, LLC
[DE-AC52-07NA27344]
FX The authors would like to thank Dr. L. Leal of Oak Ridge National
Laboratory, for the guidence and help with the SAMMY7 fitting code. This
work henefited from the use of the LANSCE accelerator facility. Work was
performed under the auspices of the U.S. Department of Energy at Los
Alamos National Laboratory by the Los Alamos National Security, LLC
under Contract No. DE-AC52-06NA25396 and at Lawrence Livermore National
Laboratory by the Lawrence Livermore National Security, LLC under
Contract No. DE-AC52-07NA27344.
NR 21
TC 0
Z9 0
U1 1
U2 4
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0524-0
J9 AIP CONF PROC
PY 2008
VL 1005
BP 30
EP +
PG 2
WC Physics, Nuclear
SC Physics
GA BHR38
UT WOS:000255660900005
ER
PT S
AU Oh, SY
Kawano, T
Kahler, S
Dashdorj, D
Cowell, S
AF Oh, S. Y.
Kawano, T.
Kahler, S.
Dashdorj, D.
Cowell, S.
BA Escher, J
BF Escher, J
BE Dietrich, FS
Kawano, T
Thompson, IJ
TI Nuclear reaction data on titanium isotopes
SO COMPOUND-NUCLEAR REACTIONS AND RELATED TOPICS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Workshop on Compound-Nuclear Reactions and Related Topics
CY OCT 22-26, 2007
CL Oakhurst, CA
SP N Div Lawrence Livermore Natl Lab, Theoret Div Los Alamos Natl Lab
DE nuclear reaction modeling; resonance; titanium; ENDF/B; criticality
benchmark
ID ENDF/B-VII.0
AB We evaluated the nuclear data on titanium isotopes, Ti46-50. We used GNASH, a Hauser-Feshbach reaction model code, for the threshold reactions and CoH for the total and capture cross sections. While we calculated the transmission coefficients using well-known optical potentials for the GNASH calculation, we adjusted the level density and the pre-equilibrium parameters by taking into account the LANSCE/GEANIE experiment on Ti-48 reaction cross sections as well as other experiments available for (n,p), (n,alpha), etc. The direct inelastic scattering was also included by using the coupled-channel calculation and the DWBA method. The coupled-channels potential was assumed to be similar to the spherical potential of Koning and Delaroche with proper deformation parameters. Meanwhile we investigated the resolved resonance parameters in the energy region below several hundred keV. In essence, we adopted the parameters from the Mughabghab's 2006 compilation, making some adjustments to mainly reproduce the reference thermal cross sections. This new evaluation was validated with the MCNP calculations of k-eff"s on seven hard-spectrum criticality experiments that involve Ti as a reflector or moderator.
C1 [Oh, S. Y.; Kawano, T.; Kahler, S.; Cowell, S.] Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
[Dashdorj, D.] North Carolina State Univ, Raleigh, NC 27695 USA.
RP Oh, SY (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
NR 12
TC 0
Z9 0
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0524-0
J9 AIP CONF PROC
PY 2008
VL 1005
BP 34
EP +
PG 2
WC Physics, Nuclear
SC Physics
GA BHR38
UT WOS:000255660900006
ER
PT S
AU Dean, DJ
AF Dean, D. J.
BA Escher, J
BF Escher, J
BE Dietrich, FS
Kawano, T
Thompson, IJ
TI Understanding nuclei: progress and challenges
SO COMPOUND-NUCLEAR REACTIONS AND RELATED TOPICS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Workshop on Compound-Nuclear Reactions and Related Topics
CY OCT 22-26, 2007
CL Oakhurst, CA
SP N Div Lawrence Livermore Natl Lab, Theoret Div Los Alamos Natl Lab
DE nuclear structure; exotic nuclei; computing
ID QUANTUM-SYSTEMS; CONTINUUM; STATES; FIELD; MODEL
AB Nuclear theory today aims for a comprehensive theoretical framework that can describe all nuclei. I discuss recent progress in this pursuit and the associated challenges as we move forward, paying particular attention to progress in the applications of coupled-cluster theory to the challenges.
C1 Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
RP Dean, DJ (reprint author), Oak Ridge Natl Lab, Div Phys, POB 2008, Oak Ridge, TN 37831 USA.
OI Dean, David/0000-0002-5688-703X
NR 41
TC 0
Z9 0
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0524-0
J9 AIP CONF PROC
PY 2008
VL 1005
BP 41
EP 46
PG 6
WC Physics, Nuclear
SC Physics
GA BHR38
UT WOS:000255660900007
ER
PT S
AU Sheets, SA
AF Sheets, S. A.
BA Escher, J
BF Escher, J
BE Dietrich, FS
Kawano, T
Thompson, IJ
TI Is there a low-energy enhancement in the photon strength function in
molybdenum?
SO COMPOUND-NUCLEAR REACTIONS AND RELATED TOPICS
SE AIP CONFERENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT International Workshop on Compound-Nuclear Reactions and Related Topics
CY OCT 22-26, 2007
CL Oakhurst, CA
SP N Div Lawrence Livermore Natl Lab, Theoret Div Los Alamos Natl Lab
DE photon strength function; resonance neutron capture; Mo-96; gamma-ray
spectroscopy
AB Recent claims of a low-energy enhancement in the photon strength function of Mo-96 are investigated. Using the DANCE detector the gamma-ray spectra following resonance neutron capture was measured. The spectrum fitting method was used to indirectly extract a photon strength function from the gamma-ray spectra. No strong low energy enhancement in the photon strength function was found.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Sheets, SA (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
NR 5
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0524-0
J9 AIP CONF PROC
PY 2008
VL 1005
BP 74
EP 76
PG 3
WC Physics, Nuclear
SC Physics
GA BHR38
UT WOS:000255660900014
ER
PT S
AU Gibelin, J
Phair, L
Wiedeking, M
Bernstein, LA
Burke, JT
Bleuel, DL
Clark, RM
Cromaz, M
Deleplanque, MA
Fallon, P
Hatarik, R
Lake, PT
Lee, IY
Lesher, SR
Lyles, BF
Macchiavelli, AO
McMahan, MA
Rodriguez-Vieitez, E
Moretto, LG
AF Gibelin, J.
Phair, L.
Wiedeking, M.
Bernstein, L. A.
Burke, J. T.
Bleuel, D. L.
Clark, R. M.
Cromaz, M.
Deleplanque, M-A.
Fallon, P.
Hatarik, R.
Lake, P. T.
Lee, I-Y.
Lesher, S. R.
Lyles, B. F.
Macchiavelli, A. O.
McMahan, M. A.
Rodriguez-Vieitez, E.
Moretto, L. G.
BA Escher, J
BF Escher, J
BE Dietrich, FS
Kawano, T
Thompson, IJ
TI Fusion-evaporation reactions: a tool for gamma-ray spectroscopy on light
nuclei
SO COMPOUND-NUCLEAR REACTIONS AND RELATED TOPICS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Workshop on Compound-Nuclear Reactions and Related Topics
CY OCT 22-26, 2007
CL Oakhurst, CA
SP N Div Lawrence Livermore Natl Lab, Theoret Div Los Alamos Natl Lab
DE fusion/evaporation reactions; light nuclei; gamma-spectroscopy
AB We have studied the weak-decay channels of fusion/evaporation in light projectile/light target systems in order to provide reliable predictions for gamma-spectroscopy experiments.
C1 [Gibelin, J.; Phair, L.; Wiedeking, M.; Clark, R. M.; Cromaz, M.; Deleplanque, M-A.; Fallon, P.; Lake, P. T.; Lee, I-Y.; Macchiavelli, A. O.; McMahan, M. A.; Rodriguez-Vieitez, E.; Moretto, L. G.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Bernstein, L. A.; Burke, J. T.; Bleuel, D. L.; Lesher, S. R.; Lyles, B. F.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Hatarik, R.] Rutgers State Univ, New Brunswick, NJ 08854 USA.
[Lake, P. T.; Lyles, B. F.; Rodriguez-Vieitez, E.; Moretto, L. G.] Univ Calif Berkeley, Berkeley, CA 94720 USA.
RP Gibelin, J (reprint author), Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RI Burke, Jason/I-4580-2012;
OI GIBELIN, Julien/0000-0001-6751-3714
FU U.S. Department of Energy [DE-AC02-05CHI1231]; U.S. Department of Energy
by the University of California,Lawrence Livermore National Laboratory
[DE-AC52-07NA27344]
FX The authors thank the operations staff of the 88-Inch Cyclotron. Support
for Lawrence Berkeley National Laboratory was provided by the U.S.
Department of Energy under Contract No. DE-AC02-05CHI1231. Part of this
work was performed under the auspices of the U.S. Department of Energy
by the University of California,Lawrence Livermore National Laboratory
under Contract No. DE-AC52-07NA27344.
NR 9
TC 3
Z9 3
U1 2
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0524-0
J9 AIP CONF PROC
PY 2008
VL 1005
BP 77
EP +
PG 2
WC Physics, Nuclear
SC Physics
GA BHR38
UT WOS:000255660900015
ER
PT S
AU Escher, J
AF Escher, Jutta
BA Escher, J
BF Escher, J
BE Dietrich, FS
Kawano, T
Thompson, IJ
TI Compound-nuclear reaction cross sections from surrogate measurements:
Status and challenges
SO COMPOUND-NUCLEAR REACTIONS AND RELATED TOPICS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Workshop on Compound-Nuclear Reactions and Related Topics
CY OCT 22-26, 2007
CL Oakhurst, CA
SP N Div Lawrence Livermore Natl Lab, Theoret Div Los Alamos Natl Lab
DE compound nucleus; Surrogate reaction; indirect measurement;
neutron-induced fission; radiative neutron capture
ID ACTINIDE NUCLEI; FISSION; CAPTURE
AB The Surrogate nuclear reactions method, an indirect approach for determining cross sections for compound-nuclear reactions involving difficult-to-produce targets, is reviewed. The underlying formalism is outlined, the challenges involved in carrying out a complete Surrogate treatment are detailed, and the present status of the theory is summarized. The approximations employed in the analyses of Surrogate experiments are discussed and their validity is examined.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Escher, J (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RI Escher, Jutta/E-1965-2013
NR 23
TC 3
Z9 3
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0524-0
J9 AIP CONF PROC
PY 2008
VL 1005
BP 83
EP 89
PG 7
WC Physics, Nuclear
SC Physics
GA BHR38
UT WOS:000255660900016
ER
PT S
AU Jurado, B
Kessedjian, G
Aiche, M
Barreau, G
Bidaud, A
Czajkowski, S
Dassie, D
Haas, B
Mathieu, L
Osmanov, B
Audouin, L
Capellan, N
Tassan-Got, L
Wilson, JN
Berthoumieux, E
Gunsing, F
Theisen, C
Serot, O
Bauge, E
Ahmad, I
Greene, JP
Janssens, RVF
AF Jurado, B.
Kessedjian, G.
Aiche, M.
Barreau, G.
Bidaud, A.
Czajkowski, S.
Dassie, D.
Haas, B.
Mathieu, L.
Osmanov, B.
Audouin, L.
Capellan, N.
Tassan-Got, L.
Wilson, J. N.
Berthoumieux, E.
Gunsing, F.
Theisen, Ch.
Serot, O.
Bauge, E.
Ahmad, I.
Greene, J. P.
Janssens, R. V. F.
BA Escher, J
BF Escher, J
BE Dietrich, FS
Kawano, T
Thompson, IJ
TI Fission cross sections and fission-fragment mass yields via the
surrogate reaction method
SO COMPOUND-NUCLEAR REACTIONS AND RELATED TOPICS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Workshop on Compound-Nuclear Reactions and Related Topics
CY OCT 22-26, 2007
CL Oakhurst, CA
SP N Div Lawrence Livermore Natl Lab, Theoret Div Los Alamos Natl Lab
DE surrogate reaction technique; neutron-induced fission cross sections;
fission fragment mass yields
ID TRANSFER-REACTION TH-232(HE-3; NEUTRON FISSION; ACTINIDE NUCLEI;
PA-233(N; P)PA-234
AB The surrogate reaction method is a powerful tool to infer neutron-induced data of short-lived nuclei. After a short overview of the experimental techniques employed in the present surrogate experiments, we will concentrate on a recent measurement to determine neutron-induced fission cross sections for the actinides Cm-242,Cm-243 and Am-241. The latest direct neutron-induced measurement for the Cm-243 fission cross section is questioned by our results, since there are differences of more than 60% in the 0.7 to 7 MeV neutron energy range. Our experimental set-up has also enabled us to measure for the first time the fission fragment "pseudo-mass" distributions of Cm-243,Cm-244,Cm-245 and Am-242 compound nuclei in the excitation energy range from a few MeV to about 25 MeV.
C1 [Jurado, B.; Kessedjian, G.; Aiche, M.; Barreau, G.; Bidaud, A.; Czajkowski, S.; Dassie, D.; Haas, B.; Mathieu, L.; Osmanov, B.] Univ Bordeaux 1, CENBG, CNRS IN2P3, Chemin Solarium BP 120, F-33175 Gradignan, France.
[Audouin, L.; Capellan, N.; Tassan-Got, L.; Wilson, J. N.] Univ Paris 11, CNRS IN2P3, IPN, F-91405 Orsay, France.
[Berthoumieux, E.; Gunsing, F.; Theisen, Ch.] CEA Saclay, DSM DAPNIA SPhN, F-91191 Gif Sur Yvette, France.
[Serot, O.] CEA Cadarache, DEN DER SPR LEPh, F-13108 St Paul Les Durance, France.
[Bauge, E.] CEA, SPN, F-91680 Bruyeres Le Chatel, France.
[Ahmad, I.; Greene, J. P.; Janssens, R. V. F.] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
RP Jurado, B (reprint author), Univ Bordeaux 1, CENBG, CNRS IN2P3, Chemin Solarium BP 120, F-33175 Gradignan, France.
FU CNRS program PACEN/GEDEPEON; Conseil Regional d'Aquitaine; U.S.
Department of Energy, Office of Nuclear Physics [DE-ACO2- 06CHI1357]
FX We thank the tandem accelerator staff and the target laboratory of the
IPN Orsay for their great support during the experiment. This work was
partly supported by the CNRS program PACEN/GEDEPEON, the Conseil
Regional d'Aquitaine, the U.S. Department of Energy, Office of Nuclear
Physics, under contract DE-ACO2- 06CHI1357. The authors are also
indebted for the use of 243AM to the Office of Basic Energy Sciences,
U.S. Department of Energy, through the transplutonium element production
facilities at Oak Ridge National Laboratory.
NR 19
TC 5
Z9 5
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0524-0
J9 AIP CONF PROC
PY 2008
VL 1005
BP 90
EP +
PG 2
WC Physics, Nuclear
SC Physics
GA BHR38
UT WOS:000255660900017
ER
PT S
AU Phair, L
Fallon, P
Clark, RM
Gibelin, J
Jewett, C
Lee, IY
Macchiavelli, AO
McMahan, MA
Moretto, LG
Rodriguez-Vieitez, E
Wiedeking, M
AF Phair, L.
Fallon, P.
Clark, R. M.
Gibelin, J.
Jewett, C.
Lee, I. Y.
Macchiavelli, A. O.
McMahan, M. A.
Moretto, L. G.
Rodriguez-Vieitez, E.
Wiedeking, M.
BA Escher, J
BF Escher, J
BE Dietrich, FS
Kawano, T
Thompson, IJ
TI Surrogate reactions in the actinide region
SO COMPOUND-NUCLEAR REACTIONS AND RELATED TOPICS
SE AIP CONFERENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT International Workshop on Compound-Nuclear Reactions and Related Topics
CY OCT 22-26, 2007
CL Oakhurst, CA
SP N Div Lawrence Livermore Natl Lab, Theoret Div Los Alamos Natl Lab
DE surrogate reaction; actinide; fission
ID CROSS-SECTIONS
AB Over the past three years we have studied various surrogate reactions (d,p), (He-3,t), (alpha,alpha') on several uranium isotopes U-234, U-235, U-236, and U-238. An overview of the STARS/LIBERACE surrogate research program as it pertains to the actinides is discussed. A summary of results to date will be presented along with a discussion of experimental difficulties encountered in surrogate experiments and future research directions.
C1 [Phair, L.; Fallon, P.; Clark, R. M.; Gibelin, J.; Jewett, C.; Lee, I. Y.; Macchiavelli, A. O.; McMahan, M. A.; Moretto, L. G.; Rodriguez-Vieitez, E.; Wiedeking, M.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP Phair, L (reprint author), Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RI Burke, Jason/I-4580-2012; Escher, Jutta/E-1965-2013;
OI GIBELIN, Julien/0000-0001-6751-3714; Allmond, James
Mitchell/0000-0001-6533-8721
NR 9
TC 1
Z9 1
U1 1
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0524-0
J9 AIP CONF PROC
PY 2008
VL 1005
BP 96
EP 100
PG 5
WC Physics, Nuclear
SC Physics
GA BHR38
UT WOS:000255660900018
ER
PT S
AU Basunia, MS
Clark, RM
Bernstein, LA
Lyles, BF
Burke, JT
Beausang, CW
Bleuel, DL
Darakchieva, B
Dietrich, FS
Evtimova, M
Fallon, P
Gibelin, J
Lesher, SR
McMahan, MA
Phair, L
Rodriguez-Vieitez, E
Wiedeking, M
AF Basunia, M. S.
Clark, R. M.
Bernstein, L. A.
Lyles, B. F.
Burke, J. T.
Beausang, C. W.
Bleuel, D. L.
Darakchieva, B.
Dietrich, F. S.
Evtimova, M.
Fallon, P.
Gibelin, J.
Lesher, S. R.
McMahan, M. A.
Phair, L.
Rodriguez-Vieitez, E.
Wiedeking, M.
BA Escher, J
BF Escher, J
BE Dietrich, FS
Kawano, T
Thompson, IJ
TI Study of the (He-3, t) charge transfer reaction as a surrogate for
neutron energy between 10 to 20 MeV
SO COMPOUND-NUCLEAR REACTIONS AND RELATED TOPICS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Workshop on Compound-Nuclear Reactions and Related Topics
CY OCT 22-26, 2007
CL Oakhurst, CA
SP N Div Lawrence Livermore Natl Lab, Theoret Div Los Alamos Natl Lab
DE surrogate; pre-equilibrium; fission cross section; charge-exchange
reaction
ID CROSS-SECTIONS
AB We have indirectly determined the Np-237(nf) cross section over an equivalent neutron energy range from 10 to 20 MeV using the surrogate reaction U-238(He-3,tf). A self-supporting similar to 761 mu g/cm(2) metallic U-238 foil was bombarded with a 42 MeV 3He2+ beam from the 88-Inch Cyclotron at Lawrence Berkeley National Laboratory (LBNL). Outgoing charged particles and fission fragments were identified using the Silicon Telescope Array for Reaction Studies (STARS) consisted of two 140 pm and one 1000 mu m Micron S2 type silicon detectors. These results were compared with the Np-237(n,f) cross section data from the direct measurements, the Evaluated Nuclear Data File (ENDF/B-VII.0), and the Japanese Evaluated Nuclear Data Library (JENDL 3.3) and found to closely follow those datasets.
C1 [Basunia, M. S.; Clark, R. M.; Bleuel, D. L.; Fallon, P.; Gibelin, J.; McMahan, M. A.; Phair, L.; Rodriguez-Vieitez, E.; Wiedeking, M.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Bernstein, L. A.; Lyles, B. F.; Burke, J. T.; Dietrich, F. S.] Lawrence Livermore Natl Lab, Livermore, CA 94511 USA.
[Beausang, C. W.; Darakchieva, B.; Evtimova, M.; Lesher, S. R.] Univ Richmond, Dept Phys, Richmond, VA 23173 USA.
RP Basunia, MS (reprint author), Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RI Burke, Jason/I-4580-2012
FU U. S. Department of Energy by the University of California, Lawrence
Berkeley National Laboratory [DE-AC03-76SF0098]; LDRD project, Lawrence
Livermore National Laboratory [W-7405-Eng-48]; University of Richmond
[DE-FG-05NA25929, DE-FG02-05ER41379]
FX We wish to thank the 88-Inch Cyclotron operation team at LBNL for their
help in performing the irradiations for this experiment. We are grateful
to R. Foreman for making the U target for this experiment. This work was
performed under the auspices of the U. S. Department of Energy by the
University of California, Lawrence Berkeley National Laboratory under
contract No. DE-AC03-76SF0098 and an LDRD project, Lawrence Livermore
National Laboratory under Contract No. W-7405-Eng-48, and the University
of Richmond contract Nos. DE-FG-05NA25929 andDE-FG02-05ER41379.
NR 13
TC 0
Z9 0
U1 2
U2 3
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0524-0
J9 AIP CONF PROC
PY 2008
VL 1005
BP 101
EP +
PG 2
WC Physics, Nuclear
SC Physics
GA BHR38
UT WOS:000255660900019
ER
PT S
AU Hatarik, R
Bernstein, LA
Burke, JT
Cizewski, JA
Gibelin, JD
Lesher, SR
O'Malley, PD
Phair, LW
Swan, T
AF Hatarik, R.
Bernstein, L. A.
Burke, J. T.
Cizewski, J. A.
Gibelin, J. D.
Lesher, S. R.
O'Malley, P. D.
Phair, L. W.
Swan, T.
BA Escher, J
BF Escher, J
BE Dietrich, FS
Kawano, T
Thompson, IJ
TI Is (d,p gamma) a surrogate for neutron capture?
SO COMPOUND-NUCLEAR REACTIONS AND RELATED TOPICS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Workshop on Compound-Nuclear Reactions and Related Topics
CY OCT 22-26, 2007
CL Oakhurst, CA
SP N Div Lawrence Livermore Natl Lab, Theoret Div Los Alamos Natl Lab
DE surrogate reactions; neutron capture
ID CLOVER
AB To benchmark the validity of using the (d,p gamma) reaction as a surrogate for (n,gamma), the Yb-171,Yb-173(d,p gamma) reactions were measured and compared with the neutron capture cross sections measured by Wisshak et al. The (d,p gamma) ratios were measured using an 18.5 MeV deuteron beam from the 88-Inch Cyclotron at LBNL. Preliminary results comparing the surrogate ratios with the known (n,gamma) cross sections are discussed.
C1 [Hatarik, R.; Cizewski, J. A.; O'Malley, P. D.; Swan, T.] Rutgers State Univ, Dept Phys & Astron, New Brunswick, NJ 08901 USA.
[Bernstein, L. A.; Burke, J. T.; Lesher, S. R.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Gibelin, J. D.; Phair, L. W.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Swan, T.] Univ Surrey, Dept Phys, Guildford, Surrey GU2 7XH, England.
RP Hatarik, R (reprint author), Rutgers State Univ, Dept Phys & Astron, New Brunswick, NJ 08901 USA.
RI Burke, Jason/I-4580-2012;
OI GIBELIN, Julien/0000-0001-6751-3714
FU U.S. Department of Energy [DEFG52-03NA00143, DE-AC02-05CH11231];
National Science Foundation; U.S. Department of Energy by Lawrence
Livermore National Laboratory [DE-AC52-07NA27344]
FX The authors thank the operations staff of the 88-Inch Cyclotron. The
Rutgers group was supported in part by the U.S. Department of Energy
under grant number DEFG52-03NA00143 and the National Science Foundation.
Part of this work was performed under the auspices of the U.S.
Department of Energy by Lawrence Livermore National Laboratory under
Contract DE-AC52-07NA27344. Support for Lawrence Berkeley National
Laboratory was provided by the U.S. Department of Energy under Contract
No. DE-AC02-05CH11231.
NR 9
TC 9
Z9 9
U1 1
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0524-0
J9 AIP CONF PROC
PY 2008
VL 1005
BP 105
EP +
PG 2
WC Physics, Nuclear
SC Physics
GA BHR38
UT WOS:000255660900020
ER
PT S
AU Scielzo, ND
Bernstein, LA
Bleuel, DL
Burke, JT
Lesher, SR
Norman, EB
Sheets, SA
Basunia, MS
Clark, RM
Fallon, P
Gibelin, J
Lyles, B
McMahan, MA
Moretto, LG
Phair, LW
Rodriguez-Vieitez, E
Wiedeking, M
Allmond, JM
Beausang, CW
AF Scielzo, N. D.
Bernstein, L. A.
Bleuel, D. L.
Burke, J. T.
Lesher, S. R.
Norman, E. B.
Sheets, S. A.
Basunia, M. S.
Clark, R. M.
Fallon, P.
Gibelin, J.
Lyles, B.
McMahan, M. A.
Moretto, L. G.
Phair, L. W.
Rodriguez-Vieitez, E.
Wiedeking, M.
Allmond, J. M.
Beausang, C. W.
BA Escher, J
BF Escher, J
BE Dietrich, FS
Kawano, T
Thompson, IJ
TI Determininig the (n,gamma) cross section of Gd-153 using surrogate
reactions
SO COMPOUND-NUCLEAR REACTIONS AND RELATED TOPICS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Workshop on Compound-Nuclear Reactions and Related Topics
CY OCT 22-26, 2007
CL Oakhurst, CA
SP N Div Lawrence Livermore Natl Lab, Theoret Div Los Alamos Natl Lab
DE surrogate reactions; s-process; branch point nuclei; compound nucleus
ID S-PROCESS
AB The astrophysical s-process is responsible for the synthesis of many of the nuclei heavier than iron through a series of low-energy (n,gamma) reactions and P-decays. For nuclei for which the neutron capture and P-decay rates are comparable, the branching is crucial for tests of s-process models. Direct measurements of (n,gamma) cross sections for these nuclei are extremely challenging due to the inherent difficulties associated with radioactive targets and the low intensity of available neutron beams. The surrogate reaction technique can be used to circumvent these difficulties by creating the same compound nucleus through light-ion reactions on a stable target. The cross section can be determined by combining optical model calculations for the formation of the compound nucleus with the measured exit channel probability for gamma-ray emission. We have collected data to determine the low-energy (n,gamma) cross section for the unstable nucleus Gd-153 by bombarding a stable Gd-154 target with protons from the 88-Inch Cyclotron at the Lawrence Berkeley National Laboratory to create the desired Gd-154* compound nucleus. The STARS/LiBerACE silicon and clover germanium detector arrays were used to detect gamma-rays in coincidence with the scattered protons. Additional cross section measurements using Gd-156 and Gd-158 targets will be compared to direct measurements of the (n,gamma) cross sections for Gd-155 and Gd-157. The current status of the analysis is summarized.
C1 [Scielzo, N. D.; Bernstein, L. A.; Bleuel, D. L.; Burke, J. T.; Lesher, S. R.; Norman, E. B.; Sheets, S. A.; Basunia, M. S.; Clark, R. M.; Fallon, P.; Gibelin, J.; Lyles, B.; McMahan, M. A.; Moretto, L. G.; Phair, L. W.; Rodriguez-Vieitez, E.; Wiedeking, M.; Allmond, J. M.; Beausang, C. W.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP Scielzo, ND (reprint author), Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
RI Burke, Jason/I-4580-2012
NR 7
TC 7
Z9 7
U1 2
U2 3
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0524-0
J9 AIP CONF PROC
PY 2008
VL 1005
BP 109
EP 112
PG 4
WC Physics, Nuclear
SC Physics
GA BHR38
UT WOS:000255660900021
ER
PT S
AU Lesher, SR
Bernstein, LA
Ai, H
Beausang, CW
Bleuel, D
Burke, JT
Clark, RM
Fallon, P
Gibelin, J
Lee, IY
Lyles, BF
Macchiavelli, AO
McMahan, MA
Moody, KJ
Norman, EB
Phair, L
Rodriguez-Vieitez, E
Wiedeking, M
AF Lesher, S. R.
Bernstein, L. A.
Ai, H.
Beausang, C. W.
Bleuel, D.
Burke, J. T.
Clark, R. M.
Fallon, P.
Gibelin, J.
Lee, I. Y.
Lyles, B. F.
Macchiavelli, A. O.
McMahan, M. A.
Moody, K. J.
Norman, E. B.
Phair, L.
Rodriguez-Vieitez, E.
Wiedeking, M.
BA Escher, J
BF Escher, J
BE Dietrich, FS
Kawano, T
Thompson, IJ
TI Benchmarking the external surrogate ratio method using the (alpha,
alpha'f) reaction at STARS
SO COMPOUND-NUCLEAR REACTIONS AND RELATED TOPICS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Workshop on Compound-Nuclear Reactions and Related Topics
CY OCT 22-26, 2007
CL Oakhurst, CA
SP N Div Lawrence Livermore Natl Lab, Theoret Div Los Alamos Natl Lab
DE surrogate reactions; fission reactions
ID FISSION CROSS-SECTIONS
AB We measured the ratio of the fission probabilities of U-234* relative to U-236* formed via an (alpha,alpha') direct reactions using the STARS array at the 88-inch cyclotron at the Lawrence Berkeley National Laboratory. This ratio has a shape similar to the ratio of neutron capture probabilities from U-233(n,f) and U-235(n,f), indicating the alpha reactions likely formed a compound nucleus. This result indicates that the ratios of fission exit channel probabilities for two actinide nuclei populated via (a, a') can be used to determine an unknown fission cross section relative to a known one. The validity of the External Surrogate Ratio Method (ESRM) is tested and the results support the conclusions of Burke et al. [1].
C1 [Lesher, S. R.; Bernstein, L. A.; Bleuel, D.; Burke, J. T.; Lyles, B. F.; Moody, K. J.; Norman, E. B.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
[Lesher, S. R.; Beausang, C. W.] Univ Richmond, Dept Phys, Richmond, VA 23173 USA.
[Ai, H.] Yale Univ, New Haven, CT 06520 USA.
[Clark, R. M.; Fallon, P.; Gibelin, J.; Macchiavelli, A. O.; McMahan, M. A.; Wiedeking, M.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP Lesher, SR (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RI Burke, Jason/I-4580-2012
FU U.S. Department of Energy by Lawrence Livermore National Laboratory
[W-7405-Eng-48, DE-AC52-07NA27344]; [DEFG52-06NA26206];
[DE-FG02-05ER41379]
FX This work is a Lawrence Livermore National Laboratory, Lawrence Berkeley
National Laboratory, University of Richmond, and Yale University
collaboration and was performed under the auspices of the U.S.
Department of Energy by Lawrence Livermore National Laboratory in part
under Contract W-7405-Eng-48 and in part under Contract
DE-AC52-07NA27344 and Grant Nos. DEFG52-06NA26206 and DE-FG02-05ER41379.
NR 11
TC 0
Z9 0
U1 3
U2 4
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0524-0
J9 AIP CONF PROC
PY 2008
VL 1005
BP 113
EP +
PG 2
WC Physics, Nuclear
SC Physics
GA BHR38
UT WOS:000255660900022
ER
PT S
AU Koehler, PE
Guber, KH
Harvey, JA
Rauscher, T
Ullmann, JL
Bredeweg, TA
O'Donnell, JM
Reifarth, R
Rundberg, RS
Vieira, DJ
Wouters, JM
AF Koehler, P. E.
Guber, K. H.
Harvey, J. A.
Rauscher, T.
Ullmann, J. L.
Bredeweg, T. A.
O'Donnell, J. M.
Reifarth, R.
Rundberg, R. S.
Vieira, D. J.
Wouters, J. M.
BA Escher, J
BF Escher, J
BE Dietrich, FS
Kawano, T
Thompson, IJ
TI Recent experiments at ORELA and LANSCE, and their impact on compound
nuclear models
SO COMPOUND-NUCLEAR REACTIONS AND RELATED TOPICS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Workshop on Compound-Nuclear Reactions and Related Topics
CY OCT 22-26, 2007
CL Oakhurst, CA
SP N Div Lawrence Livermore Natl Lab, Theoret Div Los Alamos Natl Lab
DE neutron; time-of-flight; compound nuclear models
ID RESONANCE PARAMETERS; NEUTRON RESONANCES; CROSS-SECTIONS; TH-232;
SPECTROSCOPY; SM-147
AB We present results from two recent sets of experiments to demonstrate the continuing impact of neutron time-of-flight data on the underlying assumptions and parameters of compound nuclear models.
C1 [Koehler, P. E.; Guber, K. H.; Harvey, J. A.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Rauscher, T.] Univ Basel, Dept Phys & Astron, CH-4056 Basel, Switzerland.
[Ullmann, J. L.; Bredeweg, T. A.; O'Donnell, J. M.; Reifarth, R.; Rundberg, R. S.; Vieira, D. J.; Wouters, J. M.] Los Alamos Neutron Scattering Ctr, Los Alamos, NM 87545 USA.
RP Koehler, PE (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RI Rauscher, Thomas/D-2086-2009;
OI Rauscher, Thomas/0000-0002-1266-0642; Koehler, Paul/0000-0002-6717-0771
FU U.S. Department of Energy [DE-AC05-00OR22725
]; U.S. Department of Energy ; University of
California [W-7405-ENG-36]
FX This work was supported in part by the U.S. Department of Energy
under Contract No. DE-AC05-00OR22725 with UT-Battelle, LLC. This work
has benefited from the use of the LANSCE facility at Los Alamos National
Laboratory, which was funded by the U.S. Department of Energy and
operated by the University of California under Contract
W-7405-ENG-36.
NR 28
TC 0
Z9 0
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0524-0
J9 AIP CONF PROC
PY 2008
VL 1005
BP 119
EP +
PG 2
WC Physics, Nuclear
SC Physics
GA BHR38
UT WOS:000255660900023
ER
PT S
AU Dietrich, FS
AF Dietrich, F. S.
BA Escher, J
BF Escher, J
BE Dietrich, FS
Kawano, T
Thompson, IJ
TI Compound-nucleus formation following direct interactions to
highly-excited final states
SO COMPOUND-NUCLEAR REACTIONS AND RELATED TOPICS
SE AIP CONFERENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT International Workshop on Compound-Nuclear Reactions and Related Topics
CY OCT 22-26, 2007
CL Oakhurst, CA
SP N Div Lawrence Livermore Natl Lab, Theoret Div Los Alamos Natl Lab
DE direct reactions; compound nuclear reactions; fluctuations;
direct-semidirect radiative capture
AB When direct reactions populate highly excited, unbound configurations in the residual nucleus, the nucleus may further evolve into a compound nucleus. Alternatively, the residual system may decay by emitting particles into the continuum. Understanding the relative weights of these two processes as a function of the angular momentum and parity deposited in the nucleus is important for the surrogate-reaction technique. A particularly interesting case is compound-nucleus formation via the (d,p) reaction, which may be a useful tool for forming compound nuclei off the valley of stability in inverse-kinematics experiments. We present here a study of the compound formation probability for a closely-related direct reaction, direct-semidirect radiative neutron capture.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Dietrich, FS (reprint author), Lawrence Livermore Natl Lab, POB 808,L-414, Livermore, CA 94551 USA.
NR 3
TC 7
Z9 7
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0524-0
J9 AIP CONF PROC
PY 2008
VL 1005
BP 125
EP 128
PG 4
WC Physics, Nuclear
SC Physics
GA BHR38
UT WOS:000255660900024
ER
PT S
AU Thompson, IJ
Dietrich, FS
Escher, JE
Dupuis, M
AF Thompson, I. J.
Dietrich, F. S.
Escher, J. E.
Dupuis, M.
BA Escher, J
BF Escher, J
BE Dietrich, FS
Kawano, T
Thompson, IJ
TI Compound nucleus contributions to the optical potential
SO COMPOUND-NUCLEAR REACTIONS AND RELATED TOPICS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Workshop on Compound-Nuclear Reactions and Related Topics
CY OCT 22-26, 2007
CL Oakhurst, CA
SP N Div Lawrence Livermore Natl Lab, Theoret Div Los Alamos Natl Lab
DE optical potential; compound nuclear reactions; direct reactions
AB An ab-initio calculation of the optical potential for neutron-nucleus scattering has been performed by explicitly coupling the elastic channel to all the particle-hole (p-h) excitation states in the target. These p-h states may be regarded as doorway states through which the flux flows to more complicated configurations, and (in the end) to long-lived compound nucleus resonances. The random-phase approximation (RPA) provides the linear combinations of p-h states that include the residual interactions within the target, and we show preliminary results for elastic flux loss using both p-h and RPA descriptions of target excitations.
C1 [Thompson, I. J.; Dietrich, F. S.; Escher, J. E.] Lawrence Livermore Natl Lab, POB 808,L-414, Livermore, CA 94551 USA.
[Dupuis, M.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Thompson, IJ (reprint author), Lawrence Livermore Natl Lab, POB 808,L-414, Livermore, CA 94551 USA.
RI Escher, Jutta/E-1965-2013
FU U.S.Department of Energy by Lawrence Livermore National Laboratory
[DE-AC52-07NA27344]; SciDAC [DE-FC02-07ER41457]
FX This work was performed under the auspices of the U.S.Department of
Energy by Lawrence Livermore National Laboratory under Contract
DE-AC52-07NA27344, and under SciDAC Contract DE-FC02-07ER41457.
NR 13
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0524-0
J9 AIP CONF PROC
PY 2008
VL 1005
BP 135
EP +
PG 2
WC Physics, Nuclear
SC Physics
GA BHR38
UT WOS:000255660900026
ER
PT S
AU Dupuis, M
Bonneau, L
Kawano, T
AF Dupuis, Marc
Bonneau, Ludovic
Kawano, Toshihiko
BA Escher, J
BF Escher, J
BE Dietrich, FS
Kawano, T
Thompson, IJ
TI Quantum preequilibirium multistep direct calculations for nucleon
scattering on deformed nuclei: a microscopic approach
SO COMPOUND-NUCLEAR REACTIONS AND RELATED TOPICS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Workshop on Compound-Nuclear Reactions and Related Topics
CY OCT 22-26, 2007
CL Oakhurst, CA
SP N Div Lawrence Livermore Natl Lab, Theoret Div Los Alamos Natl Lab
DE pre-equilibrium; pre-compound; multistep direct
ID STATISTICAL-THEORY; SPECTRA; U-238
AB An introduction of the different quantum mechanics models is given for the calculation of pre-equilibrium multistep direct process for nucleon induced reaction. A practical application is presented for U-238 neutron induced reaction at medium energy (10-20 MeV). The double differential cross-sections are calculated with no adjustable parameter and reproduced the data very well. The cross-sections are expressed as a sum of DWBA transition amplitudes computed with a microscopic two-body interaction. The exited states of the target are expressed as particle-hole excitations built from single particle states obtained with the HF+BCS calculation with a Skyrme force. We also perform a sensitivity study our calculations with respect to the ingredients of the model, namely the two-body interaction which generates the transitions and the target states description.
C1 [Dupuis, Marc; Kawano, Toshihiko] Los Alamos Natl Lab, T 16 Nucl Phys, Los Alamos, NM 87545 USA.
[Bonneau, Ludovic] Ctr Detude Nucl Bordeau, Gradignan, France.
RP Dupuis, M (reprint author), Los Alamos Natl Lab, T 16 Nucl Phys, Los Alamos, NM 87545 USA.
FU National Nuclear Security Administration of the U.S.Department of Energy
at Los Alamos National Laboratory [DE-AC52-06NA25396]
FX This work was carried out under the auspices of the National Nuclear
Security Administration of the U.S.Department of Energy at Los Alamos
National Laboratory under Contract No. DE-AC52-06NA25396.
NR 20
TC 2
Z9 2
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0524-0
J9 AIP CONF PROC
PY 2008
VL 1005
BP 154
EP +
PG 2
WC Physics, Nuclear
SC Physics
GA BHR38
UT WOS:000255660900030
ER
PT S
AU Arbanas, G
Bertulani, C
Dean, DJ
Kerman, AK
AF Arbanas, G.
Bertulani, C.
Dean, D. J.
Kerman, A. K.
BA Escher, J
BF Escher, J
BE Dietrich, FS
Kawano, T
Thompson, IJ
TI Statistical properties of Kawai-Kerman-McVoy T-matrix
SO COMPOUND-NUCLEAR REACTIONS AND RELATED TOPICS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Workshop on Compound-Nuclear Reactions and Related Topics
CY OCT 22-26, 2007
CL Oakhurst, CA
SP N Div Lawrence Livermore Natl Lab, Theoret Div Los Alamos Natl Lab
DE statistical nuclear reactions; compound resonance; optical background;
fluctuations; energy averaging
ID NUCLEAR-REACTIONS
AB Kawai, Kerman and McVoy (KKM) derived an optical background-plus-fluctuations representation of T-matrix, T = T-oPt + T-fluct, so that an energy average of T-fluct over a single-particle resonance width is expected to be negligibly small (Ann. of Phys. 75, 156 [1973]). We investigate this property numerically in a simple model with 1,600 compound nuclear levels and 40 channels, coupled via a random interaction. We find that the energy average of the fluctuating term is much smaller than the optical background, T-opt, in support of the KKM result. A self-contained derivation of KKM T-matrix is presented.
C1 [Arbanas, G.] Oak Ridge Natl Lab, NSTD, POB 2008, Oak Ridge, TN 37831 USA.
[Bertulani, C.] Texas A&M Univ, Dept Phys, Commerce, TX 75429 USA.
[Dean, D. J.; Kerman, A. K.] Oak Ridge Natl Lab, Phys Div, Oak Ridge, TN USA.
[Kerman, A. K.] MIT, Cambridge, MA 02139 USA.
RP Arbanas, G (reprint author), Oak Ridge Natl Lab, NSTD, POB 2008, Oak Ridge, TN 37831 USA.
OI Dean, David/0000-0002-5688-703X
FU U.S.Department of Energy [DE-AC05-00OR22725]
FX The authors would like to thank the Workshop organizers.Oak Ridge
National Laboratory is managed by UT-Battelle for the U.S.Department of
Energy under Contract No. DE-AC05-00OR22725.
NR 7
TC 3
Z9 3
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0524-0
J9 AIP CONF PROC
PY 2008
VL 1005
BP 160
EP +
PG 2
WC Physics, Nuclear
SC Physics
GA BHR38
UT WOS:000255660900031
ER
PT S
AU Dashdorj, D
Mitchell, GE
Becker, JA
Chadwick, MB
Devlin, M
Fotiades, N
Kawano, T
Nelson, RO
Wu, CY
Garrett, PE
Kunieda, S
Agvaanluvsan, U
Younes, W
AF Dashdorj, D.
Mitchell, G. E.
Becker, J. A.
Chadwick, M. B.
Devlin, M.
Fotiades, N.
Kawano, T.
Nelson, R. O.
Wu, C. Y.
Garrett, P. E.
Kunieda, S.
U., Agvaanluvsan
Younes, W.
BA Escher, J
BF Escher, J
BE Dietrich, FS
Kawano, T
Thompson, IJ
TI Effect of pre-equilibrium spin distribution on neutron-induced reaction
cross sections
SO COMPOUND-NUCLEAR REACTIONS AND RELATED TOPICS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Workshop on Compound-Nuclear Reactions and Related Topics
CY OCT 22-26, 2007
CL Oakhurst, CA
SP N Div Lawrence Livermore Natl Lab, Theoret Div Los Alamos Natl Lab
DE cross section measurement; pre-equilibrium reaction; spin distribution;
neutron-induced reactions
AB Cross section measurements were made of prompt gamma-ray production as a function of neutron energy using the germanium array for neutron induced excitations (GEANIE) at LANSCE. Measuring the prompt reaction gamma rays as a function of incident neutron energy provides more precise understanding of the spins populated by the pre-equilibrium reaction. The effect of the spin distribution in pre-equilibrium reactions has been investigated using the GNASH reaction code. Widely used classical theories such as the exciton model usually assume that the spin distribution of the pre-equilibrium reaction is the same as the spin distribution of the compound nucleus reaction mechanism. In the present approach, the pre-equilibrium reaction spin distribution was calculated using the quantum mechanical theory of Feshbach, Kerman, and Koonin (FKK). This pre-equilibrium spin distribution was incorporated into the GNASH code and the gamma-ray production Cross sections were calculated and compared with experimental data. Spin distributions peak at lower spin when calculated with the FKK formulation than with the Compound Nuclear theory. The measured partial gamma-ray cross sections reflect this spin difference. Realistic treatment of the spin distribution improves the accuracy of calculations of gamma-ray production cross sections.
C1 [Dashdorj, D.; Mitchell, G. E.] North Carolina State Univ, Raleigh, NC 27695 USA.
[Dashdorj, D.; Becker, J. A.; U., Agvaanluvsan; Younes, W.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Chadwick, M. B.; Devlin, M.; Fotiades, N.; Kawano, T.; Nelson, R. O.] Los Alamos Natl Lab, Los Alamos, NM USA.
[Garrett, P. E.] Univ Guelph, Guelph, ON N1G 2W1, Canada.
[Kunieda, S.] Japan Atom Energy Agcy, Tokai, Ibaraki, Japan.
RP Dashdorj, D (reprint author), North Carolina State Univ, Raleigh, NC 27695 USA.
RI Devlin, Matthew/B-5089-2013;
OI Devlin, Matthew/0000-0002-6948-2154; Fotiadis,
Nikolaos/0000-0003-1410-3871
FU U.S.Department of Energy [DE-FG52-06NA26194, DE-FG02-97-ER41042];
U.S.Department of Energy by Livermore National Security; LLC; Lawrence
Liver more National Laboratory [DE-AC52-06NA4464]; U.S.Department of
Energy by LosAlamos National Security; LosAlamos National Laboratory
[DE-AC52-06NA25396]
FX This work was supported by in part by the U.S.Department of Energy
Grants No.DE-FG52-06NA26194 and No.DE-FG02-97-ER41042, work performed in
part under the auspices of the U.S.Department of Energy by Livermore
National Security, LLC, Lawrence Liver more National Laboratory under
contract No.DE-AC52-06NA4464, and work performed in part under auspices
of the U.S.Department of Energy by LosAlamos National Security, LLC,
LosAlamos National Laboratory under contract No.DE-AC52-06NA25396.
NR 16
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0524-0
J9 AIP CONF PROC
PY 2008
VL 1005
BP 164
EP +
PG 2
WC Physics, Nuclear
SC Physics
GA BHR38
UT WOS:000255660900032
ER
PT S
AU Ullmann, JL
AF Ullmann, John L.
BA Escher, J
BF Escher, J
BE Dietrich, FS
Kawano, T
Thompson, IJ
TI An overview of fission measurements at LANSCE
SO COMPOUND-NUCLEAR REACTIONS AND RELATED TOPICS
SE AIP CONFERENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT International Workshop on Compound-Nuclear Reactions and Related Topics
CY OCT 22-26, 2007
CL Oakhurst, CA
SP N Div Lawrence Livermore Natl Lab, Theoret Div Los Alamos Natl Lab
DE nuclear fission; neutrons; LANSCE
ID SLOWING-DOWN SPECTROMETER
AB Fission measurements have a long history at Los Alamos. This paper reviews the current programs in neutron-induced fission at the Los Alamos Neutron Science Center.
C1 Los Alamos Natl Lab, LANSCE NS, Los Alamos, NM 87545 USA.
RP Ullmann, JL (reprint author), Los Alamos Natl Lab, LANSCE NS, POB 1663, Los Alamos, NM 87545 USA.
NR 10
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0524-0
J9 AIP CONF PROC
PY 2008
VL 1005
BP 177
EP 181
PG 5
WC Physics, Nuclear
SC Physics
GA BHR38
UT WOS:000255660900034
ER
PT S
AU Heffner, M
AF Heffner, M.
BA Escher, J
BF Escher, J
BE Dietrich, FS
Kawano, T
Thompson, IJ
TI A time projection chamber for precision Pu-239(n,f) cross section
measurement
SO COMPOUND-NUCLEAR REACTIONS AND RELATED TOPICS
SE AIP CONFERENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT International Workshop on Compound-Nuclear Reactions and Related Topics
CY OCT 22-26, 2007
CL Oakhurst, CA
SP N Div Lawrence Livermore Natl Lab, Theoret Div Los Alamos Natl Lab
DE TPC fission cross section Pu
AB High precision measurements of the Pu-239(n,f) cross section have been identified as important for the Global Nuclear Energy Partnership (GNEP) and other programs. Currently, the uncertainty on this cross section is of the order 2-3% for neutron energies below 14 MeV and the goal is to reduce this to less than 1%. The Time Projection Chamber (TPC) has been identified as a possible tool to make this high precision measurement.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Heffner, M (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave, Livermore, CA 94551 USA.
NR 7
TC 5
Z9 5
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0524-0
J9 AIP CONF PROC
PY 2008
VL 1005
BP 182
EP 185
PG 4
WC Physics, Nuclear
SC Physics
GA BHR38
UT WOS:000255660900035
ER
PT S
AU Phair, L
Moretto, LG
AF Phair, L.
Moretto, L. G.
BA Escher, J
BF Escher, J
BE Dietrich, FS
Kawano, T
Thompson, IJ
TI The fission barrier landscape
SO COMPOUND-NUCLEAR REACTIONS AND RELATED TOPICS
SE AIP CONFERENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT International Workshop on Compound-Nuclear Reactions and Related Topics
CY OCT 22-26, 2007
CL Oakhurst, CA
SP N Div Lawrence Livermore Natl Lab, Theoret Div Los Alamos Natl Lab
DE fission of light systems; fission barriers
ID SCALING LAWS; NUCLEAR; FUSION; MODEL
AB Fission excitation functions have been measured for a chain of neighboring compound nuclei from Po-207 to Po-212. We present a new analysis which provides a determination of the fission barriers and ground state shell effects with nearly spectroscopic accuracy. The accuracy achieved in this analysis may lead to a future detailed exploration of the saddle mass surface and its spectroscopy.
C1 [Phair, L.; Moretto, L. G.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Nucl Sci, Berkeley, CA 94720 USA.
RP Phair, L (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Nucl Sci, Berkeley, CA 94720 USA.
NR 11
TC 0
Z9 0
U1 1
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0524-0
J9 AIP CONF PROC
PY 2008
VL 1005
BP 186
EP 189
PG 4
WC Physics, Nuclear
SC Physics
GA BHR38
UT WOS:000255660900036
ER
PT S
AU Younes, W
Gogny, D
AF Younes, W.
Gogny, D.
BA Escher, J
BF Escher, J
BE Dietrich, FS
Kawano, T
Thompson, IJ
TI Microscopic theory of fission
SO COMPOUND-NUCLEAR REACTIONS AND RELATED TOPICS
SE AIP CONFERENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT International Workshop on Compound-Nuclear Reactions and Related Topics
CY OCT 22-26, 2007
CL Oakhurst, CA
SP N Div Lawrence Livermore Natl Lab, Theoret Div Los Alamos Natl Lab
DE fission; Hartree Fock Bogoliubov; Gogny interaction; fission fragments;
plutonium
AB In recent years, the microscopic method has been applied to the notoriously difficult problem of nuclear fission with unprecedented success. In this paper, we discuss some of the achievements and promise of the microscopic method, as embodied in the Hartree-Fock method using the Gogny finite-range effective interaction, and beyond-mean-field extensions to the theory. The nascent program to describe induced fission observables using this approach at the Lawrence Livermore National Laboratory is presented.
C1 [Younes, W.; Gogny, D.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Younes, W (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
NR 14
TC 2
Z9 2
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0524-0
J9 AIP CONF PROC
PY 2008
VL 1005
BP 194
EP 197
PG 4
WC Physics, Nuclear
SC Physics
GA BHR38
UT WOS:000255660900038
ER
PT S
AU Talou, P
Kawano, T
Bonneau, L
AF Talou, P.
Kawano, T.
Bonneau, L.
BA Escher, J
BF Escher, J
BE Dietrich, FS
Kawano, T
Thompson, IJ
TI Prompt fission neutrons as probes to nuclear configurations at scission
SO COMPOUND-NUCLEAR REACTIONS AND RELATED TOPICS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Workshop on Compound-Nuclear Reactions and Related Topics
CY OCT 22-26, 2007
CL Oakhurst, CA
SP N Div Lawrence Livermore Natl Lab, Theoret Div Los Alamos Natl Lab
DE neutron-induced fission; Uranium 235; prompt fission neutrons; scission;
Monte Carlo simulations
ID U-235
AB Prompt fission neutrons and gamma-rays emitted by excited primary fission fragments are indirect probes to the nuclear configurations present near the scission point. By studying detailed characteristics of these quantities, it is shown that one can discriminate between various assumptions regarding the sharing of the free energy at scission among the two fragments. The case of low-energy neutron-induced fission on U-235 is studied and interpreted in terms of fission modes.
C1 [Talou, P.; Kawano, T.] Los Alamos Natl Lab, Div Theoret, Nucl Phys Grp, Los Alamos, NM 87545 USA.
[Bonneau, L.] CEN Bordeaux Gradignan, F-33175 Gradignan, France.
RP Talou, P (reprint author), Los Alamos Natl Lab, Div Theoret, Nucl Phys Grp, Los Alamos, NM 87545 USA.
NR 9
TC 3
Z9 3
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0524-0
J9 AIP CONF PROC
PY 2008
VL 1005
BP 198
EP +
PG 2
WC Physics, Nuclear
SC Physics
GA BHR38
UT WOS:000255660900039
ER
PT S
AU Vogt, R
Randrup, J
AF Vogt, Ramona
Randrup, Jorgen
BA Escher, J
BF Escher, J
BE Dietrich, FS
Kawano, T
Thompson, IJ
TI Event-by-event simulation of induced fission
SO COMPOUND-NUCLEAR REACTIONS AND RELATED TOPICS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Workshop on Compound-Nuclear Reactions and Related Topics
CY OCT 22-26, 2007
CL Oakhurst, CA
SP N Div Lawrence Livermore Natl Lab, Theoret Div Los Alamos Natl Lab
DE fission simulation
AB We are developing a novel code that treats induced fission by statistical (or Monte-Carlo) simulation of individual decay chains. After its initial excitation, the fissionable compound nucleus may either de-excite by evaporation or undergo binary fission into a large number of fission channels each with different energetics involving both energy dissipation and deformed scission pre-fragments. After separation and Coulomb acceleration, each fission fragment undergoes a succession of individual (neutron) evaporations, leading to two bound but still excited fission products (that may further decay electromagnetically and, ultimately, weakly), as well as typically several neutrons. (The inclusion of other possible ejectiles is planned.) This kind of approach makes it possible to study more detailed observables than could be addressed with previous treatments which have tended to focus on average quantities. In particular, any type of correlation observable can readily be extracted from a generated set of events. With a view towards making the code practically useful in a variety of applications, emphasis is being put on making it numerically efficient so that large event samples can be generated quickly. In its present form, the code can generate one million full events in about 12 seconds on a MacBook laptop computer. The development of this qualitatively new tool is still at an early stage and quantitative reproduction of existing data should not be expected until a number of detailed refinement have been implemented.
C1 [Vogt, Ramona] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Vogt, Ramona] Univ Calif Davis, Dept Phys, Davis, CA USA.
[Randrup, Jorgen] Lawrence Berkeley Natl Lab, Berkeley, CA USA.
RP Vogt, R (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
FU U.S.Department of Energy by Lawrence Livermore National Laboratory
[DE-AC52-07NA27344]; National Science Foundation [NSF PHY-0555660]; US
Department of Energy [DE-AC02-05CH1I231]
FX We thank D.A.Brown,T Kawano, P.Moller, B.Norman, J.Swiatecki, P.Talou
and W Younes for discussions. The work of RV was performed under the
auspices of the U.S.Department of Energy by Lawrence Livermore National
Laboratory under Contract DE-AC52-07NA27344 and was also supported in
part by the National Science Foundation Grant NSF PHY-0555660. The work
of JR was supported in part by the US Department of Energy, Contract
Numbers DE-AC02-05CH1I231.
NR 3
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0524-0
J9 AIP CONF PROC
PY 2008
VL 1005
BP 202
EP +
PG 2
WC Physics, Nuclear
SC Physics
GA BHR38
UT WOS:000255660900040
ER
PT S
AU Stoyer, MA
AF Stoyer, Mark A.
BA Escher, J
BF Escher, J
BE Dietrich, FS
Kawano, T
Thompson, IJ
TI Nuclear reactions used for superheavy element research
SO COMPOUND-NUCLEAR REACTIONS AND RELATED TOPICS
SE AIP CONFERENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT International Workshop on Compound-Nuclear Reactions and Related Topics
CY OCT 22-26, 2007
CL Oakhurst, CA
SP N Div Lawrence Livermore Natl Lab, Theoret Div Los Alamos Natl Lab
DE superheavy elements; nuclear reactions
ID HEAVIEST NUCLEI; ISOMERS
AB Some of the most fascinating questions about the limits of nuclear stability are confronted in the heaviest nuclei. How many more new elements can be synthesized? What are the nuclear and chemical properties of these exotic nuclei? Does the "Island of Stability" exist and can we ever explore the isotopes inhabiting that nuclear region? This paper will focus on the current experimental research on the synthesis and characterization of superheavy nuclei with Z>112 from the Dubna/Livermore collaboration. Reactions using Ca-48 projectiles from the U400 cyclotron and actinide targets (U-233,U-238, Np-237, Pu-242,Pu-244, (243)AM, Cm-245,Cm-248, Cf-249) have been investigated using the Dubna Gas Filled Recoil Separator in Dubna over the last 8 years. In addition, several experiments have been performed to investigate the chemical properties of some of the observed longer-lived isotopes produced in these reactions. Some comments will be made on nuclear reactions used for the production of the heaviest elements. A summary of the current status of the upper end of the chart of nuclides will be presented.
C1 Lawrence Livermore Natl Lab, Phys Sci Directorate, N Div, Livermore, CA 94550 USA.
RP Stoyer, MA (reprint author), Lawrence Livermore Natl Lab, Phys Sci Directorate, N Div, Livermore, CA 94550 USA.
NR 13
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0524-0
J9 AIP CONF PROC
PY 2008
VL 1005
BP 209
EP 214
PG 6
WC Physics, Nuclear
SC Physics
GA BHR38
UT WOS:000255660900041
ER
PT S
AU Gupta, SS
Heger, A
Moller, P
Kawano, T
AF Gupta, Sanjib S.
Heger, A.
Moeller, P.
Kawano, T.
BA Escher, J
BF Escher, J
BE Dietrich, FS
Kawano, T
Thompson, IJ
TI Electron Capture-delayed neutron-emissions in neutron star crust
simulations using a Hauser-Feshbach model
SO COMPOUND-NUCLEAR REACTIONS AND RELATED TOPICS
SE AIP CONFERENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT International Workshop on Compound-Nuclear Reactions and Related Topics
CY OCT 22-26, 2007
CL Oakhurst, CA
SP N Div Lawrence Livermore Natl Lab, Theoret Div Los Alamos Natl Lab
DE nucleosynthesis; neutron stars; nuclear reactions; deep crustal heating;
superbursts; X-ray binaries; X-ray bursts
ID X-RAY-BURSTS; OCEAN
AB Recently, Electron Captures (henceforth EC) into excited states of neutron-rich nuclei were shown by the LANL-Michigan State-Mainz collaboration to result in Neutron Star (henceforth NS) Crust heating which was 4 - 5 times that of previous calculations. That result also highlighted the importance of a spread in X-ray burst abundances over several mass chains which could contribute to substantial heating through large shell and sub-shell gaps showing up in the excitation energy spectrum of the EC daughter. Such effects did not dominate when a single beta-stable species was evolved in an accreted parcel of matter in earlier calculations. We are now exploring the nucleosynthesis and heating from neutron processes deeper in the NS Crust around 10(11) g cm(-3). Electron captures into excited states of neutron-rich nuclei above neutron separation energies requires a Hauser-Feshbach code to calculate the branchings between 1-, 2-,3 -,...neutron emission rates in the stellar environment. Since the evolving composition has a free neutron fraction at a very density, the equilibrium composition at a given depth requires readjustments with respect to both the electron chemical potential and the neutron chemical potential, and the emitted neutrons can be captured into other mass chains with a net release of heat. From a nucleosynthesis perspective, we have a very interesting and hitherto unexplored pattern of weak interactions and neutron processes similar to the r-process, with the exception that the weak processes are primarily density-driven in the rather cold crust (T-9 = 0.4 - 0.6) and in the beta(+) direction, that is, toward increasing neutron richness.
C1 [Gupta, Sanjib S.; Heger, A.; Moeller, P.; Kawano, T.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Gupta, SS (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
OI Moller, Peter/0000-0002-5848-3565
NR 10
TC 1
Z9 1
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0524-0
J9 AIP CONF PROC
PY 2008
VL 1005
BP 221
EP 224
PG 4
WC Physics, Nuclear
SC Physics
GA BHR38
UT WOS:000255660900043
ER
PT S
AU Hoffman, RD
Fisker, JL
Pruet, J
Woosley, SE
Janka, HT
Buras, R
AF Hoffman, R. D.
Fisker, J. L.
Pruet, J.
Woosley, S. E.
Janka, H. -T.
Buras, R.
BA Escher, J
BF Escher, J
BE Dietrich, FS
Kawano, T
Thompson, IJ
TI Nucleosynthesis in early neutrino driven winds
SO COMPOUND-NUCLEAR REACTIONS AND RELATED TOPICS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Workshop on Compound-Nuclear Reactions and Related Topics
CY OCT 22-26, 2007
CL Oakhurst, CA
SP N Div Lawrence Livermore Natl Lab, Theoret Div Los Alamos Natl Lab
DE supernovae; nucleosynthesis
ID SUPERNOVA; NUCLEI
AB Two recent issues realted to nucleosynthesis in early proton-rich neutrino winds are investigated. In the first part we investigate the effect of nuclear physics uncertainties on the synthesis of Mo-92 and Mo-94. Based on recent experimental results, we find that the proton rich winds of the model investigated here can not be the only source of the solar abundance of Mo-92 and (MO)-M-94. In the second part we investigate the nucleosynthesis from neutron rich bubbles and show that they do not contribute to the nucleosynthesis integrated over both neutron and proton-rich bubbles and proton-rich winds.
C1 [Hoffman, R. D.; Fisker, J. L.] Lawrence Livermore Natl Lab, POB 808,L-414, Livermore, CA 94550 USA.
[Woosley, S. E.] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA.
[Janka, H. -T.; Buras, R.] Max Planck Inst Astrophys, D-85748 Garching, Germany.
RP Hoffman, RD (reprint author), Lawrence Livermore Natl Lab, POB 808,L-414, Livermore, CA 94550 USA.
RI Buras-Schnell, Robert/B-3170-2011
OI Buras-Schnell, Robert/0000-0002-4217-4522
FU U.S.Department of Energy by Lawrence Livermore National Laboratory
[W-7405-Eng-48]; SciDAC Program of the US Department of Energy
[DC-FC02-01ER41176]; Deutsche Forschungs-gemeinschaft through the
Transregional Collaborative Research Centers [SFB/TR 27]; national
supercomputer NEC SX-8 at the High in Performance Computing Center
Stuttgart(HLRS) [N/12758]; [DE-AC52-07NA27344]; [SFB/TR 7]
FX This work was performed under the auspices of the U.S.Department of
Energy by Lawrence Livermore National Laboratory in part under Contract
W-7405-Eng-48 and in part under Contract DE-AC52-07NA27344. It was also
supported, in part, by the SciDAC Program of the US Department of Energy
(DC-FC02-01ER41176). The project in Garching was supported by the
Deutsche Forschungs-gemeinschaft through the Transregional Collaborative
Research Centers SFB/TR 27 "Neutrinos and Beyond" and SFB/TR 7
"Gravitational Wave Astronomy",and the Cluster of Excellence EXC 153
"Origin and Structure of the Universe". The SN simulations were
performed on the national supercomputer NEC SX-8 at the High in
Performance Computing Center Stuttgart(HLRS) under grant number
SuperN/12758.
NR 15
TC 3
Z9 3
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0524-0
J9 AIP CONF PROC
PY 2008
VL 1005
BP 225
EP +
PG 2
WC Physics, Nuclear
SC Physics
GA BHR38
UT WOS:000255660900044
ER
PT S
AU Boyd, RN
AF Boyd, Richard N.
BA Escher, J
BF Escher, J
BE Dietrich, FS
Kawano, T
Thompson, IJ
TI Use of NIF in nuclear astrophysics: Examples of experiments
SO COMPOUND-NUCLEAR REACTIONS AND RELATED TOPICS
SE AIP CONFERENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT International Workshop on Compound-Nuclear Reactions and Related Topics
CY OCT 22-26, 2007
CL Oakhurst, CA
SP N Div Lawrence Livermore Natl Lab, Theoret Div Los Alamos Natl Lab
DE nuclear reactions; nuclear astrophysics
AB The National Ignition Facility, the world's largest laser, is scheduled for completion in 2009, and will beginning performing experiments in basic science about the same time. NIF is expected to produce temperatures and densities well above those at the core of the Sun, so it appears to have the capability to study thermally averaged cross sections involving a variety of light nuclei, many of which are of interest to nuclear astrophysics. Most of these reactions are affected, in some instances dominated, by compound nuclear states. This paper first describes some of the basic parameters of NIF, then discusses several experiments in nuclear astrophysics, some of which might be performed at NIF, and some of which could not be performed at any other facility in existence.
C1 Lawrence Livermore Natl Lab, Natl Ignit Facil, Livermore, CA 94550 USA.
RP Boyd, RN (reprint author), Lawrence Livermore Natl Lab, Natl Ignit Facil, 7000 East Ave, Livermore, CA 94550 USA.
NR 5
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0524-0
J9 AIP CONF PROC
PY 2008
VL 1005
BP 229
EP 232
PG 4
WC Physics, Nuclear
SC Physics
GA BHR38
UT WOS:000255660900045
ER
PT S
AU Lin, SD
Verspoor, K
AF Lin, Shou-De
Verspoor, Karin
BE Gelbukh, A
TI A semantics-enhanced language model for unsupervised word sense
disambiguation
SO COMPUTATIONAL LINGUISTICS AND INTELLIGENT TEXT PROCESSING
SE Lecture Notes in Computer Science
LA English
DT Proceedings Paper
CT 9th International Conference on Intelligent Text Processing and
Computational Linguistics
CY FEB 17-23, 2008
CL Univ Haifa, Haifa, ISRAEL
SP Computat Linguist Grp, Univ Haifa, Caesarea Edmond Benjamin de Rothschild Fdn Inst Interdisciplinary Applicat Comp Sci
HO Univ Haifa
AB An N-gram language model aims at capturing statistical word order dependency information from corpora. Although the concept of language models has been applied extensively to handle a variety of NLP problems with reasonable success, the standard model does not incorporate semantic information, and consequently limits its applicability to semantic problems such as word sense disambiguation. We propose a framework that integrates semantic information into the language model schema, allowing a system to exploit both syntactic and semantic information to address NLP problems. Furthermore, acknowledging the limited availability of semantically annotated data, we discuss how the proposed model can be learned without annotated training examples. Finally, we report on a case study showing how the semantics-enhanced language model can be applied to unsupervised word sense disambiguation with promising results.
C1 [Lin, Shou-De] Natl Taiwan Univ, Taipei, Taiwan.
[Verspoor, Karin] Los Alamos Natl Lab, Los Alamos, NM 87544 USA.
RP Lin, SD (reprint author), Natl Taiwan Univ, Taipei, Taiwan.
EM sdlin@csie.ntu.edu.tw; verspoor@lanl.gov
OI LIN, SHOU-DE/0000-0001-9970-1250; Verspoor, Karin/0000-0002-8661-1544
NR 18
TC 1
Z9 1
U1 0
U2 0
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0302-9743
BN 978-3-540-78134-9
J9 LECT NOTES COMPUT SC
PY 2008
VL 4919
BP 287
EP +
PG 3
WC Computer Science, Artificial Intelligence; Computer Science, Theory &
Methods
SC Computer Science
GA BHJ77
UT WOS:000253658200024
ER
PT S
AU Nieplocha, J
Krishamoorthy, S
Valiev, M
Krishnan, M
Palmer, B
Sadayappan, P
AF Nieplocha, Jarek
Krishamoorthy, Sriram
Valiev, Marat
Krishnan, Manoj
Palmer, Bruce
Sadayappan, P.
BE Bubak, M
VanAlbada, GD
Dongarra, J
Sloot, PMA
TI Integrated data and task management for scientific applications
SO COMPUTATIONAL SCIENCE - ICCS 2008, PT 1
SE Lecture Notes in Computer Science
LA English
DT Proceedings Paper
CT 8th International Conference on Computational Science
CY JUN 23-25, 2008
CL Cracow, POLAND
SP Hewlett Packard Co, Intel Corp, Qumak Sekom AM & IBM, Microsoft Corp, ATM SA, Elsevier, Springer
DE Global Array programming; computational kernels; MPI; task management;
data management
AB Several emerging application areas require intelligent management of distributed data and tasks that encapsulate execution units for collection of processors or processor groups. This paper describes an integration of data and task parallelism to address the needs of such applications in context of the Global Array (GA) programming model. GA provides programming interfaces for managing shared arrays based on non-partitioned global address space programming model concepts. Compatibility with MPI enables the scientific programmer to benefit from performance and productivity advantages of these high level programming abstractions using standard programming languages and compilers.
C1 [Nieplocha, Jarek; Krishamoorthy, Sriram; Valiev, Marat; Krishnan, Manoj; Palmer, Bruce] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Sadayappan, P.] Ohio State Univ, Columbus, OH 43210 USA.
RP Nieplocha, J (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA.
EM jarek.nieplocha@pnl.gov; sriram@pnl.gov; marat.valiev@pnl.gov;
manoj@pnl.gov; bruce.palmer@pnl.gov; saday@cse.ohio-state.edu
NR 13
TC 1
Z9 1
U1 0
U2 1
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0302-9743
BN 978-3-540-69383-3
J9 LECT NOTES COMPUT SC
PY 2008
VL 5101
BP 20
EP +
PG 3
WC Computer Science, Theory & Methods; Mathematics
SC Computer Science; Mathematics
GA BHX33
UT WOS:000257188800003
ER
PT S
AU Childs, H
AF Childs, Hank
BE Bubak, M
VanAlbada, GD
Dongarra, J
Sloot, PMA
TI Why petascale visualization and analysis will change the rules
SO COMPUTATIONAL SCIENCE - ICCS 2008, PT 1
SE LECTURE NOTES IN COMPUTER SCIENCE
LA English
DT Proceedings Paper
CT 8th International Conference on Computational Science
CY JUN 23-25, 2008
CL Cracow, POLAND
SP Hewlett Packard Co, Intel Corp, Qumak Sekom AM & IBM, Microsoft Corp, ATM SA, Elsevier, Springer
AB In the last decade, supercomputers and the scientific simulations performed on them have dramatically increased in size. Currently, simulations can use hundreds of TeraFLOPs (trillions of floating point operations per second) and generate many, many terabytes of data. In the near future, we will see PetaFLOP computing and petabytes of data. In addition, a critical step in the simulation process is "postprocessing": applying visualization and analysis techniques to better understand the simulation. As a result, the issues of visualizing and analyzing massive data sets have never been more important. This puts the spotlight on two key issues. One, are we prepared for the unprecedented scale of data that we will need to postprocess? And, two, assuming that we can handle data of this size, can we intelligently analyze these simulations? I will argue that, for both of these questions, we must "change the rules" and make dramatic departures from our current modus operandi.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Childs, H (reprint author), Lawrence Livermore Natl Lab, POB 808,L-557, Livermore, CA 94551 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0302-9743
BN 978-3-540-69383-3
J9 LECT NOTES COMPUT SC
PY 2008
VL 5101
BP 32
EP 32
PG 1
WC Computer Science, Theory & Methods; Mathematics
SC Computer Science; Mathematics
GA BHX33
UT WOS:000257188800004
ER
PT S
AU Sosonkina, M
Sharda, A
Negoita, A
Vary, JP
AF Sosonkina, Masha
Sharda, Anurag
Negoita, Alina
Vary, James P.
BE Bubak, M
VanAlbada, GD
Dongarra, J
Sloot, PMA
TI Integration of ab initio nuclear physics calculations with optimization
techniques
SO COMPUTATIONAL SCIENCE - ICCS 2008, PT 1
SE Lecture Notes in Computer Science
LA English
DT Proceedings Paper
CT 8th International Conference on Computational Science
CY JUN 23-25, 2008
CL Cracow, POLAND
SP Hewlett Packard Co, Intel Corp, Qumak Sekom AM & IBM, Microsoft Corp, ATM SA, Elsevier, Springer
DE No Core Shell Model; MFDn; derivative-free optimization; VTDIRECT95
AB Optimization techniques are finding their inroads into the field of nuclear physics calculations where the objective functions are very complex and computationally intensive. A vast space of parameters needs searching to obtain a good match between theoretical (computed) and experimental observables, such as energy levels and spectra. In this paper, we propose a design integrating the ab initio nuclear physics code MFDn and the VTDIRECT95 code for derivative-free optimization. We experiment with the initial implementation of the design showing good matches for several single-nucleus cases. For the parallel MFDn code, we determine appropriate processor numbers to execute efficiently a multiple-nuclei parameter search.
C1 [Sosonkina, Masha; Sharda, Anurag] Iowa State Univ Sci & Technol, Ames Lab, DOE, Ames, IA 50011 USA.
[Negoita, Alina; Vary, James P.] Iowa State Univ Sci & Technol, Dept Phys, Ames, IA 50011 USA.
RP Sosonkina, M (reprint author), Iowa State Univ Sci & Technol, Ames Lab, DOE, Ames, IA 50011 USA.
EM masha@scl.ameslab.gov; anurag@scl.ameslab.gov; alina@iastate.edu;
jvary@iastate.edu
RI Dongarra, Jack/E-3987-2014
FU Iowa State University [DE-AC02-07CH11358]; U.S. Department of Energy
[DE-FC02-7ER41457, DE-FG02-87ER40371]; NERSC
FX The work was supported in part by Iowa State University under the
contract DE-AC02-07CH11358 with the U.S. Department of Energy, by the
U.S. Department of Energy under the grants DE-FC02-7ER41457 (UNEDF
SciDAC-2) and DE-FG02-87ER40371 (Division of Nuclear Physics), and by
NERSC.
NR 12
TC 6
Z9 6
U1 0
U2 0
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0302-9743
BN 978-3-540-69383-3
J9 LECT NOTES COMPUT SC
PY 2008
VL 5101
BP 833
EP +
PG 3
WC Computer Science, Theory & Methods; Mathematics
SC Computer Science; Mathematics
GA BHX33
UT WOS:000257188800085
ER
PT S
AU Bhowmick, S
Hovland, PD
AF Bhowmick, Sanjukta
Hovland, Paul D.
BE Bubak, M
VanAlbada, GD
Dongarra, J
Sloot, PMA
TI Improving the performance of graph coloring algorithms through
backtracking
SO COMPUTATIONAL SCIENCE - ICCS 2008, PT 1
SE Lecture Notes in Computer Science
LA English
DT Proceedings Paper
CT 8th International Conference on Computational Science
CY JUN 23-25, 2008
CL Cracow, POLAND
SP Hewlett Packard Co, Intel Corp, Qumak Sekom AM & IBM, Microsoft Corp, ATM SA, Elsevier, Springer
DE graph coloring; backtracking
AB Graph coloring is used to identify independent objects in a set and has applications in a wide variety of scientific and engineering problems. Optimal coloring of graphs is an NP-complete problem. Therefore there exist many heuristics that attempt to obtain a near-optimal number of colors. In this paper we introduce a backtracking correction algorithm which dynamically rearranges the colors assigned by a top level heuristic to a more favorable permutation thereby improving the performance of the coloring algorithm. Our results obtained by applying the backtracking heuristic on graphs from molecular dynamics and DNA-electrophoresis show that the backtracking algorithm succeeds in lowering the number of colors by as much as 23%. Variations of backtracking algorithm can be as much as 66% faster than standard correction algorithms, like Culberson's Iterated Greedy method, while producing a comparable number of colors.
C1 [Bhowmick, Sanjukta] Penn State Univ, Dept Comp Sci & Engn, University Pk, PA 16802 USA.
[Hovland, Paul D.] Argonne Natl Lab, Div Math & Comp Sci, Argonne, IL 60439 USA.
RP Bhowmick, S (reprint author), Penn State Univ, Dept Comp Sci & Engn, University Pk, PA 16802 USA.
EM bhowmick@cse.psu.edu; hovland@mcs.anl.gov
FU Office of Computational Technology Research; U.S. Department of Energy
[W-31-109-Eng-38]
FX This work was supported by the Mathematical, Information, and
Computational Sciences Division subprogram of the Office of
Computational Technology Research, U.S. Department of Energy under
Contract W-31-109-Eng-38.The idea for the backtracking algorithm was
inspired by reading the excellent review on graph coloring algorithms by
Assefaw Gebremedhin, Fredrik Manne and Alex Pothen [7]. We are also
grateful to Assefaw Gebremedhin and Rahmi Aksu for letting us use their
graph coloring software. Our implementation of the backtracking
algorithm was built on top of this software. We would also like to thank
Sven Leyffer for his assistance in using integer programming to find
optimal colorings for several small matrices. We thank Gail Pieper for
proofreading a draft of this paper.
NR 10
TC 3
Z9 3
U1 0
U2 1
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0302-9743
BN 978-3-540-69383-3
J9 LECT NOTES COMPUT SC
PY 2008
VL 5101
BP 873
EP +
PG 2
WC Computer Science, Theory & Methods; Mathematics
SC Computer Science; Mathematics
GA BHX33
UT WOS:000257188800089
ER
PT S
AU Mishra, SK
Muralidharan, K
Deymier, P
Frantziskonis, G
Simunovic, S
Pannala, S
AF Mishra, Sudib K.
Muralidharan, Krishna
Deymier, Pierre
Frantziskonis, George
Simunovic, Srdjan
Pannala, Sreekanth
BE Bubak, M
VanAlbada, GD
Dongarra, J
Sloot, PMA
TI Wavelet based spatial scaling of coupled reaction diffusion fields
SO COMPUTATIONAL SCIENCE - ICCS 2008, PT 2
SE Lecture Notes in Computer Science
LA English
DT Proceedings Paper
CT 8th International Conference on Computational Science
CY JUN 23-25, 2008
CL Cracow, POLAND
SP Hewlett Packard Co, Intel Corp, Qumak Sekom AM & IBM, Microsoft Corp, ATM SA, Elsevier, Springer
DE multiscale; wavelets; up-scaling; down-scaling; reaction; diffusion
AB Multiscale schemes for transferring information from fine to coarse scales are typically based on some sort of averaging. Such schemes smooth the fine scale features of the underlying fields, thus altering the fine scale correlations. As a superior alternative to averaging, a wavelet based scheme for the exchange of information between a reactive and diffusive field in the context of multiscale reaction-diffusion problems is proposed and analyzed. The scheme is shown to be efficient in passing information along scales, from fine to coarse, i.e. up-scaling as well as from coarse to fine, i.e. down-scaling. In addition, it retains fine scale statistics, mainly due to the capability of wavelets to represent fields hierarchically. Critical to the success of the scheme is the identification of dominant scales containing the majority of useful information. The scheme is applied in detail to the analysis of a diffusive system with chemically reacting boundary. Reactions are simulated using kinetic Monte Carlo (KMC) and diffusion is solved by finite differences. Spatial scale differences are present at the interface of the KMC sites and the diffusion grid. The computational efficiency of the scheme is compared to results obtained by local averaging, and to results from a benchmark model. The spatial scaling scheme ties to wavelet based schemes for temporal scaling, presented elsewhere by the authors.
C1 [Mishra, Sudib K.; Frantziskonis, George] Univ Arizona, Dept Civil Engn & Engn Mech, POB 210072, Tucson, AZ 85721 USA.
[Muralidharan, Krishna; Deymier, Pierre] Univ Arizona, Dept Mat Sci & Engn, Tucson, AZ 85721 USA.
[Frantziskonis, George] Univ Arizona, Dept Mat Sci & Engn, Dept Civil Engn & Engn Mech, Tucson, AZ 85721 USA.
[Simunovic, Srdjan; Pannala, Sreekanth] Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN USA.
RP Mishra, SK (reprint author), Univ Arizona, Dept Civil Engn & Engn Mech, POB 210072, Tucson, AZ 85721 USA.
EM sudib@email.arizona.edu; krishna@email.arizona.edu;
deymier@email.arizona.edu; frantzis@email.arizona.edu;
simunovics@ornl.gov; pannalas@ornl.gov
RI Pannala, Sreekanth/F-9507-2010
FU Mathematical, Information, and Computational Sciences Division; LLC
[De-AC05-00OR22725]
FX This research is sponsored by the Mathematical, Information, and
Computational Sciences Division; Office of Advanced Scientific Computing
Research; U.S.Department of Energy with Dr. Anil Deane as the program
manager. The work was partly performed at the Oak Ridge National
Laboratory, which is managed by UT-Battelle, LLC under Contract No.
De-AC05-00OR22725. Discussions with M. Syamlal, T. J. O'Brien, and D.
Alfonso of the National Energy Technology Laboratory (NETL), C.S Daw and
P. Nukala of Oak Ridge National Laboratory, Rodney Fox and Z. Gao of
Iowa State University have been very useful.
NR 10
TC 0
Z9 0
U1 0
U2 3
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0302-9743
BN 978-3-540-69386-4
J9 LECT NOTES COMPUT SC
PY 2008
VL 5102
BP 301
EP +
PG 2
WC Business; Computer Science, Theory & Methods; Education & Educational
Research; Education, Scientific Disciplines; Mathematics, Applied;
Social Sciences, Mathematical Methods
SC Business & Economics; Computer Science; Education & Educational
Research; Mathematics; Mathematical Methods In Social Sciences
GA BHV99
UT WOS:000256933800033
ER
PT S
AU Preissl, R
Schulz, M
Kranzlmuller, D
de Supinski, BR
Quinlan, DJ
AF Preissl, Robert
Schulz, Martin
Kranzlmueller, Dieter
de Supinski, Bronis R.
Quinlan, Daniel J.
BE Bubak, M
Dongarra, J
VanAlbada, GD
Sloot, PMA
TI Using MPI communication patterns to guide source code transformations
SO COMPUTATIONAL SCIENCE - ICCS 2008, PT 3
SE Lecture Notes in Computer Science
LA English
DT Proceedings Paper
CT 8th International Conference on Computational Science
CY JUN 23-25, 2008
CL Cracow, POLAND
SP Hewlett Packard Co, Intel Corp, Qumak Sekom AM & IBM, Microsoft Corp, ATM SA, Elsevier, Springer
AB Optimizing the performance of HPC software requires a high-level understanding of communication patterns as well as their relation to source code structures. We describe an algorithm to detect communication patterns in parallel traces and show how these patterns can guide static code analysis. First, we detect patterns that identify potential bottlenecks in MPI communication traces. Next, we associate the patterns with the corresponding nodes in an abstract syntaxtree using the ROSE compiler framework. Finally we perform static analysis on the annotated control flow and system dependence graphs to guide transformations such as code motion or the automatic introduction of MPI collectives.
C1 [Preissl, Robert; Schulz, Martin; de Supinski, Bronis R.; Quinlan, Daniel J.] Lawrence Livermore Natl Lab, CASC, Lawrence, KS USA.
[Preissl, Robert; Kranzlmueller, Dieter] Univ Linz, GUP, Linz, Austria.
RP Preissl, R (reprint author), Lawrence Livermore Natl Lab, CASC, Lawrence, KS USA.
EM preissl2@llnl.gov; schul.zm@llnl.gov; dk@gup.jku.at; bronis@llnl.gov;
dquinlan@llnl.gov
FU U.S. Department of Energy by Lawrence Livermore National Laboratory
[DE-AC52-07NA27344, LLNL-CONF-400356]
FX Part of this work was performed under the auspices of the U.S.
Department of Energy by Lawrence Livermore National Laboratory under
Contract DE-AC52-07NA27344. (LLNL-CONF-400356).
NR 12
TC 6
Z9 6
U1 0
U2 2
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0302-9743
BN 978-3-540-69388-8
J9 LECT NOTES COMPUT SC
PY 2008
VL 5103
BP 253
EP +
PG 3
WC Computer Science, Software Engineering; Computer Science, Theory &
Methods; Mathematical & Computational Biology; Mathematics, Applied
SC Computer Science; Mathematical & Computational Biology; Mathematics
GA BHW68
UT WOS:000257065900029
ER
PT S
AU Vilkomir, SA
Swain, WT
Poore, JH
Clarno, KT
AF Vilkomir, Sergiy A.
Swain, W. Thomas
Poore, Jesse H.
Clarno, Kevin T.
BE Bubak, M
Dongarra, J
VanAlbada, GD
Sloot, PMA
TI Modeling input space for testing scientific computational software: A
case study
SO COMPUTATIONAL SCIENCE - ICCS 2008, PT 3
SE Lecture Notes in Computer Science
LA English
DT Proceedings Paper
CT 8th International Conference on Computational Science
CY JUN 23-25, 2008
CL Cracow, POLAND
SP Hewlett Packard Co, Intel Corp, Qumak Sekom AM & IBM, Microsoft Corp, ATM SA, Elsevier, Springer
ID DESIGN
AB An application of a method of test case generation for scientific computational software is presented. NEWTRNX, neutron transport software being developed at Oak Ridge National Laboratory, is treated as a case study. A model of dependencies between input parameters of NEWTRNX is created. Results of NEWTRNX model analysis and test case generation are evaluated.
C1 [Vilkomir, Sergiy A.; Swain, W. Thomas; Poore, Jesse H.] Univ Tennessee, Dept Elect Engn & Comp Sci, Knoxville, TN 37996 USA.
[Clarno, Kevin T.] Oak Ridge Natl Lab, Nucl Sci & Technol Div, Reactor Anal Grp, Oak Ridge, TN 37923 USA.
RP Vilkomir, SA (reprint author), Univ Tennessee, Dept Elect Engn & Comp Sci, Knoxville, TN 37996 USA.
EM vilkomir@eecs.utk.edu; swain@eecs.utk.edu; poore@eecs.utk.edu;
clarnokt@ornl.gov
OI Clarno, Kevin/0000-0002-5999-2978
FU University of Tennessee Computational Science Initiative in
collaboration with the Computing and Computational Sciences Directorate
of Oak Ridge National Laboratory; Laboratory Directed Research and
Development Program of Oak Ridge National Laboratory (ORNL); U. S.
Department of Energy [DE-AC05-00OR22725.]
FX This research is supported by the University of Tennessee Computational
Science Initiative in collaboration with the Computing and Computational
Sciences Directorate of Oak Ridge National Laboratory. Research
sponsored by the Laboratory Directed Research and Development Program of
Oak Ridge National Laboratory (ORNL), managed by UT-Battelle, LLC for
the U. S. Department of Energy under Contract No. DE-AC05-00OR22725.
NR 14
TC 3
Z9 3
U1 0
U2 1
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0302-9743
BN 978-3-540-69388-8
J9 LECT NOTES COMPUT SC
PY 2008
VL 5103
BP 291
EP +
PG 3
WC Computer Science, Software Engineering; Computer Science, Theory &
Methods; Mathematical & Computational Biology; Mathematics, Applied
SC Computer Science; Mathematical & Computational Biology; Mathematics
GA BHW68
UT WOS:000257065900034
ER
PT J
AU Langston, MA
Perkins, AD
Saxton, AM
Scharff, JA
Voy, BH
AF Langston, Michael A.
Perkins, Andy D.
Saxton, Arnold M.
Scharff, Jon A.
Voy, Brynn H.
TI Innovative computational methods for transcriptomic data analysis: A
case study in the use of FPT for practical algorithm design and
implementation
SO COMPUTER JOURNAL
LA English
DT Article; Proceedings Paper
CT Model Transformation Track held at the 21st Annual ACM Symposium on
Applied Computing
CY APR 23, 2006-APR 27, 5006
CL Dijon, FRANCE
SP ACM
DE transcriptomic data analysis; fixed-parameter tractability; graph
algorithms
ID PROTEIN-PROTEIN INTERACTIONS; EXPRESSION DATA-ANALYSIS; GENE-EXPRESSION;
MICROARRAY DATA; SACCHAROMYCES-CEREVISIAE; COEXPRESSION NETWORKS;
CLUSTER-ANALYSIS; ORGANIZATION; RADIATION; PATHWAYS
AB Tools of molecular biology and the evolving tools of genomics can now be exploited to study the genetic regulatory mechanisms that control cellular responses to a wide variety of stimuli. These responses are highly complex, and involve many genes and gene products. The main objectives of this paper are to describe a novel research program centered on understanding these responses by ( i) developing powerful graph algorithms that exploit the innovative principles of fixed parameter tractability in order to generate distilled gene sets; ( ii) producing scalable, high performance parallel and distributed implementations of these algorithms utilizing cutting-edge computing platforms and auxiliary resources; ( iii) employing these implementations to identify gene sets suggestive of co-regulation; and ( iv) performing sequence analysis and genomic data mining to examine, winnow and highlight the most promising gene sets for more detailed investigation. As a case study, we describe our work aimed at elucidating genetic regulatory mechanisms that control cellular responses to low-dose ionizing radiation ( IR). A low-dose exposure, as defined here, is an exposure of at most 10 cGy ( rads). While the consequences of high doses of radiation are well known, the net outcome of low-dose exposures continues to be debated, with support in the literature for both detrimental and beneficial effects. We use genome-scale gene expression data collected in response to low-dose IR exposure in vivo to identify the pathways that are activated or repressed as a tissue responds to the radiation insult. The driving motivation is that knowledge of these pathways will help clarify and interpret physiological responses to IR, which will advance our understanding of the health consequences of low-dose radiation exposures.
C1 [Langston, Michael A.; Perkins, Andy D.; Scharff, Jon A.] Univ Tennessee, Dept Comp Sci, Knoxville, TN 37996 USA.
[Saxton, Arnold M.] Univ Tennessee, Dept Anim Sci, Knoxville, TN 37996 USA.
[Voy, Brynn H.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Langston, MA (reprint author), Univ Tennessee, Dept Comp Sci, Knoxville, TN 37996 USA.
EM langston@cs.utk.edu
RI Langston, Michael/A-9484-2011
NR 66
TC 9
Z9 9
U1 0
U2 3
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0010-4620
J9 COMPUT J
JI Comput. J.
PD JAN
PY 2008
VL 51
IS 1
BP 26
EP 38
DI 10.1093/comjnl/bxm003
PG 13
WC Computer Science, Hardware & Architecture; Computer Science, Information
Systems; Computer Science, Software Engineering; Computer Science,
Theory & Methods
SC Computer Science
GA 250MV
UT WOS:000252305200003
ER
PT J
AU Mourad, HM
Williams, TO
Addessio, FL
AF Mourad, Hashem M.
Williams, Todd O.
Addessio, Francis L.
TI Finite element analysis of inelastic laminated plates using a
global-local formulation with delamination
SO COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
LA English
DT Article
DE Multi-layered composite plates; Global-local modeling; Hybrid finite
element methods
ID COMPOSITE PLATES; SHEAR DEFORMATION; LAGRANGIAN-MULTIPLIERS; SANDWICH
PLATES; ORDER THEORY; INTERFACES; CONSTRAINTS; FRAMEWORK; STRESSES;
CONTACT
AB This work represents the initial step toward the development of an efficient computational framework that can be used to study the response and/or failure of laminated composite plates under a variety of loading conditions, including complex, severe, static and dynamic loads. The proposed finite element formulation is based on the global-local laminated plate theory of Williams [T.O. Williams, A generalized multilength scale non-linear composite plate theory with delamination, Int. J. Solids Struct. 36 (20) (1999) 3015-3050], which is founded on a generalized superposition of displacement fields associated with different length scales: the global field, which spans the thickness of the plate, and a set of local fields consistent with the layering thickness. This global-local strategy allows the local (layerwise) fields to be activated only in regions of critical interest within the computational domain, to obtain accurate results in those regions without compromising overall computational efficiency. In the present work, attention is restricted to the geometrically linear case; however, the formulation allows treatment of problems involving non-linear constitutive behavior, and facilitates the incorporation of delamination kinematics. Several numerical examples are presented to examine the performance characteristics of the proposed global-local plate element. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Mourad, Hashem M.; Williams, Todd O.; Addessio, Francis L.] Los Alamos Natl Lab, Theoret Div T 3, Los Alamos, NM 87545 USA.
RP Mourad, HM (reprint author), Los Alamos Natl Lab, Theoret Div T 3, Mail Stop B216, Los Alamos, NM 87545 USA.
EM hmourad@lanl.gov
OI Mourad, Hashem/0000-0003-2621-3867
NR 46
TC 10
Z9 10
U1 1
U2 4
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0045-7825
J9 COMPUT METHOD APPL M
JI Comput. Meth. Appl. Mech. Eng.
PY 2008
VL 198
IS 3-4
BP 542
EP 554
DI 10.1016/j.cma.2008.09.006
PG 13
WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary
Applications; Mechanics
SC Engineering; Mathematics; Mechanics
GA 385LY
UT WOS:000261816900013
ER
PT J
AU Dolbow, J
Mosso, S
Robbins, J
Voth, T
AF Dolbow, John
Mosso, Stewart
Robbins, Joshua
Voth, Tom
TI Coupling volume-of-fluid based interface reconstructions with the
extended finite element method
SO COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
LA English
DT Article
DE interface reconstruction; extended finite element; volume-of-fluid
ID PARTITION; GROWTH; SET
AB We examine the coupling of the patterned-interface-reconstruction (PIR) algorithm with the extended finite element method (X-FEM) for general multi-material problems over structured and unstructured meshes. The coupled method offers the advantages of allowing for local, element-based reconstructions of the interface, and facilitates the imposition of discrete conservation laws. Of particular note is the use of an interface representation that is volume-of-fluid based, giving rise to a segmented interface representation that is not continuous across element boundaries. In conjunction with such a representation, we employ enrichment with the ridge function for treating material interfaces and an analog to Heaviside enrichment for treating free surfaces. We examine a series of benchmark problems that quantify the convergence aspects of the coupled method and examine the sensitivity to noise in the interface reconstruction. The fidelity of a remapping strategy is also examined for a moving interface problem. (c) 2007 Elsevier B.V. All rights reserved.
C1 [Dolbow, John] Dept Civil & Environm Engn, Durham, NC 27708 USA.
[Mosso, Stewart; Robbins, Joshua; Voth, Tom] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Dolbow, J (reprint author), Dept Civil & Environm Engn, Durham, NC 27708 USA.
EM jdolbow@duke.edu
RI Dolbow, John/F-9347-2010
NR 20
TC 1
Z9 4
U1 0
U2 6
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0045-7825
J9 COMPUT METHOD APPL M
JI Comput. Meth. Appl. Mech. Eng.
PY 2008
VL 197
IS 5
BP 439
EP 447
DI 10.1016/j.cma.2007.08.010
PG 9
WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary
Applications; Mechanics
SC Engineering; Mathematics; Mechanics
GA 242YT
UT WOS:000251762800010
ER
PT J
AU Puso, MA
Laursen, TA
Solberg, J
AF Puso, Michael A.
Laursen, T. A.
Solberg, Jerome
TI A segment-to-segment mortar contact method for quadratic elements and
large deformations
SO COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
LA English
DT Article
DE contact/impact; friction; mortar methods; quadratic interpolation; large
deformation
ID FORMULATION
AB This paper describes a new extension of mortar based, segment-to-segment algorithms for large deformation contact analysis, permitting their use when quadratic interpolations are used in the underlying finite element method. The work builds upon results previously described by Puso and Laursen [M.A. Puso, T.A. Laursen, A mortar segment-to-segment contact method for large deformation solid mechanics, Comput. Methods Appl. Mech. Engrg. 193 (2004) 601-629; M.A. Puso, T.A. Laursen, A mortar segment-to-segment frictional contact method for large deformations, Comput. Methods Appl. Mech. Engrg. 193 (2004) 601-629], where methods were developed for quasistatic and implicit dynamic analysis in the context of linear element interpolations. Here, we see that many algorithmic ideas from the linear case can be adopted for use with quadratic elements along with different alternative interpolations of the mortar (contact) multipliers. The result is a class of methods appropriate for use for either mesh tying, true large sliding simulation (frictionless or frictional) and readily admits mixing of element types. Several numerical examples are given to demonstrate the effectiveness of the approach. (D 2007 Elsevier 13N. All rights reserved.
C1 [Puso, Michael A.; Solberg, Jerome] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Laursen, T. A.] Duke Univ, Dept Civil & Environm Engn, Computat Mech Lab, Durham, NC 27708 USA.
RP Puso, MA (reprint author), Lawrence Livermore Natl Lab, PO Box 808, Livermore, CA 94550 USA.
EM puso@llnl.gov
OI Laursen, Tod/0000-0003-4704-7730
NR 20
TC 52
Z9 53
U1 1
U2 15
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0045-7825
J9 COMPUT METHOD APPL M
JI Comput. Meth. Appl. Mech. Eng.
PY 2008
VL 197
IS 6-8
BP 555
EP 566
DI 10.1016/j.cma.2007.08.009
PG 12
WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary
Applications; Mechanics
SC Engineering; Mathematics; Mechanics
GA 241LE
UT WOS:000251657100008
ER
PT J
AU Scovazzi, G
Love, E
Shashkov, M
AF Scovazzi, G.
Love, E.
Shashkov, Mt
TI Multi-scale Lagrangian shock hydrodynamics on Q1/P0 finite elements:
Theoretical framework and two-dimensional computations
SO COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
LA English
DT Article
DE Lagrangian shock hydrodynamics; variational multi-scale method;
stabilization; hourglass instability
ID ASSUMED STRAIN STABILIZATION; HEXAHEDRAL ELEMENT; FORMULATION;
ALGORITHMS; VISCOSITY; ENERGY; FLUX; SUPG
AB A new multi-scale, stabilized method for Q1/P0 finite element computations of Lagrangian shock hydrodynamics is presented. Instabilities (of hourglass type) are controlled by a stabilizing operator derived using the variational multi-scale analysis paradigm. The resulting stabilizing term takes the form of a pressure correction. With respect to broadly accepted hourglass control approaches, the novelty of the method resides in its residual-based character. The stabilizing residual has a definite physical significance, since it embeds a discrete form of the Clausius-Duhem inequality. Effectively, the proposed stabilization samples the production of entropy to counter numerical instabilities. The proposed technique is applied to materials with no shear strength (e.g., fluids), for which there exists a caloric equation of state, and extensions to the case of materials with shear strength (e.g., solids) are also envisioned. The stabilization operator is incorporated into a mid-point, predictor/multi-corrector time integration algorithm, which conserves mass, momentum and total energy. Encouraging numerical results in the context of compressible gas dynamics confirm the potential of the method. (C) 2007 Elsevier B.V. All rights reserved.
C1 [Scovazzi, G.; Love, E.] Sandia Natl Labs, Computat & Multiphys Dept 1431, Albuquerque, NM 87185 USA.
[Shashkov, Mt] Los Alamos Natl Lab, Div Theoret, Grp T7, Los Alamos, NM 87545 USA.
RP Scovazzi, G (reprint author), Sandia Natl Labs, Computat & Multiphys Dept 1431, POB 5800,MS 1319, Albuquerque, NM 87185 USA.
EM gscovaz@sandia.gov
NR 33
TC 39
Z9 41
U1 0
U2 2
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0045-7825
J9 COMPUT METHOD APPL M
JI Comput. Meth. Appl. Mech. Eng.
PY 2008
VL 197
IS 9-12
BP 1056
EP 1079
DI 10.1016/j.cma.2007.10.002
PG 24
WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary
Applications; Mechanics
SC Engineering; Mathematics; Mechanics
GA 257JF
UT WOS:000252794400011
ER
PT J
AU Pilch, M
AF Pilch, Martin
TI Special issue: Validation challenge workshop - Preface
SO COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
LA English
DT Editorial Material
C1 Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Pilch, M (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
NR 0
TC 1
Z9 1
U1 0
U2 0
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0045-7825
J9 COMPUT METHOD APPL M
JI Comput. Meth. Appl. Mech. Eng.
PY 2008
VL 197
IS 29-32
BP 2373
EP 2374
DI 10.1016/j.cma.2007.10.017
PG 2
WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary
Applications; Mechanics
SC Engineering; Mathematics; Mechanics
GA 315CR
UT WOS:000256856000001
ER
PT J
AU Hills, RG
Pilch, M
Dowding, KJ
Red-Horse, J
Paez, TL
Babuska, I
Tempone, R
AF Hills, Richard G.
Pilch, Martin
Dowding, Kevin J.
Red-Horse, John
Paez, Thomas L.
Babuska, Ivo
Tempone, Raul
TI Validation challenge workshop
SO COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
LA English
DT Editorial Material
DE validation; modeling; simulation
ID COMPUTATIONAL FLUID-DYNAMICS; MODEL VALIDATION; VERIFICATION;
UNCERTAINTY; CODE; SIMULATION
AB This special issue presents the results of the Sandia organized Model Validation Challenge Workshop, held May 2006. The workshop brought together researchers from different fields to present various approaches to model validation, and focused on the methodological elements of model validation rather than on model building. Three problems were defined in the disciplines of structural statics, structural dynamics, and heat transfer, all with a uniform structure. The workshop was specifically designed to investigate the relative merits of different approaches to hierarchal model validation through application to these problems. This paper describes a hierarchal approach in the challenge problems, presents the uniform conceptual framework that was used for the challenge problem definitions, and provides an overview of the organization of this special issue. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Babuska, Ivo] Univ Texas Austin, ICES, Austin, TX 78712 USA.
[Hills, Richard G.] New Mexico State Univ, Las Cruces, NM 88003 USA.
[Pilch, Martin; Dowding, Kevin J.; Red-Horse, John; Paez, Thomas L.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Tempone, Raul] Florida State Univ, SCS, Tallahassee, FL 32306 USA.
RP Babuska, I (reprint author), Univ Texas Austin, ICES, Austin, TX 78712 USA.
EM babuska@ices.utexas.edu
RI TEMPONE, RAUL/G-6557-2014
OI TEMPONE, RAUL/0000-0003-1967-4446
NR 24
TC 24
Z9 29
U1 0
U2 12
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0045-7825
EI 1879-2138
J9 COMPUT METHOD APPL M
JI Comput. Meth. Appl. Mech. Eng.
PY 2008
VL 197
IS 29-32
BP 2375
EP 2380
DI 10.1016/j.cma.2007.10.016
PG 6
WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary
Applications; Mechanics
SC Engineering; Mathematics; Mechanics
GA 315CR
UT WOS:000256856000002
ER
PT J
AU Dowding, KJ
Red-Horse, JR
Paez, TL
Babuska, IM
Hills, RG
Tempone, R
AF Dowding, Kevin J.
Red-Horse, John R.
Paez, Thomas L.
Babuska, Ivo M.
Hills, Richard G.
Tempone, Raul
TI Validation challenge workshop summary
SO COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
LA English
DT Editorial Material
C1 [Dowding, Kevin J.; Red-Horse, John R.; Paez, Thomas L.] Sandia Natl Labs, Validat & Uncertainty Quantificat Dept, Albuquerque, NM 87185 USA.
[Babuska, Ivo M.; Tempone, Raul] Univ Texas Austin, ICES, Austin, TX 78712 USA.
[Hills, Richard G.] New Mexico State Univ, Las Cruces, NM 88003 USA.
[Tempone, Raul] Florida State Univ, Dept Math Sci, Sch Computat Sci, Tallahassee, FL 32306 USA.
RP Dowding, KJ (reprint author), Sandia Natl Labs, Validat & Uncertainty Quantificat Dept, Albuquerque, NM 87185 USA.
EM babuska@ices.utexas.edu
RI TEMPONE, RAUL/G-6557-2014
OI TEMPONE, RAUL/0000-0003-1967-4446
NR 7
TC 2
Z9 2
U1 1
U2 2
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0045-7825
J9 COMPUT METHOD APPL M
JI Comput. Meth. Appl. Mech. Eng.
PY 2008
VL 197
IS 29-32
BP 2381
EP 2384
DI 10.1016/j.cma.2007.10.015
PG 4
WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary
Applications; Mechanics
SC Engineering; Mathematics; Mechanics
GA 315CR
UT WOS:000256856000003
ER
PT J
AU Dowding, KJ
Pilch, M
Hills, RG
AF Dowding, Kevin J.
Pilch, Martin
Hills, Richard G.
TI Formulation of the thermal problem
SO COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
LA English
DT Article; Proceedings Paper
CT Validation Methodology Workshop
CY MAY 22-23, 2006
CL Albuquerque, NM
SP Sandia Natl Lab
DE validation; uncertainty; simulation; modeling; thermal
AB This paper describes the thermal problem and presents the experimental data for validation. The thermal problem involves validating a model for heat conduction in a solid. The mathematical model is based on one-dimensional, linear heat conduction in a solid slab, with heat flux boundary conditions. Experimental data from a series of material characterization, validation, and accreditation experiments related to the mathematical model are provided. The objective is to use the series of experiments to assess the model, and then use the model to predict regulatory performance relative to a regulatory requirement. The regulatory requirement is defined in terms of the probability that a surface temperature not exceed a specified temperature at the regulatory conditions. (C) 2007 Elsevier B.V. All rights reserved.
C1 [Dowding, Kevin J.] Sandia Natl Labs, Validat & Uncertainty Quantificat Dept 1544, Albuquerque, NM 87185 USA.
[Pilch, Martin] Sandia Natl Labs, QMU, Albuquerque, NM 87185 USA.
[Pilch, Martin] Sandia Natl Labs, Management Support Dept 1221, Albuquerque, NM 87185 USA.
[Hills, Richard G.] New Mexico State Univ, Dept Mech Engn, Dept 3450, Las Cruces, NM 88003 USA.
RP Dowding, KJ (reprint author), Sandia Natl Labs, Validat & Uncertainty Quantificat Dept 1544, POB 5800, Albuquerque, NM 87185 USA.
EM kjdowdi@sandia.gov; mpilch@sandia.gov; rhills@nmsu.edu
NR 1
TC 31
Z9 37
U1 0
U2 7
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0045-7825
J9 COMPUT METHOD APPL M
JI Comput. Meth. Appl. Mech. Eng.
PY 2008
VL 197
IS 29-32
BP 2385
EP 2389
DI 10.1016/j.cma.2007.09.029
PG 5
WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary
Applications; Mechanics
SC Engineering; Mathematics; Mechanics
GA 315CR
UT WOS:000256856000004
ER
PT J
AU Ferson, S
Oberkampf, WL
Ginzburg, L
AF Ferson, Scott
Oberkampf, William L.
Ginzburg, Lev
TI Model validation and predictive capability for the thermal challenge
problem
SO COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
LA English
DT Article; Proceedings Paper
CT Validation Methodology Workshop
CY MAY 22-23, 2006
CL Albuquerque, NM
SP Sandia Natl Lab
DE validation; predictive capability; thermal challenge problem; area
metric
ID UNCERTAINTY; PROPAGATION
AB We address the thermal problem posed at the Sandia Validation Challenge Workshop. Unlike traditional approaches that confound calibration with validation and prediction, our approach strictly distinguishes these activities, and produces a quantitative measure of model-form uncertainty in the face of available data. We introduce a general validation metric that can be used to characterize the disagreement between the quantitative predictions from a model and relevant empirical data when either or both predictions and data are expressed as probability distributions. By considering entire distributions, this approach generalizes traditional approaches to validation that focus only on the mean behaviors of predictions and observations. The proposed metric has several desirable properties that should make it practically useful in engineering, including objectiveness and robustness, retaining the units of the data themselves, and generalizing the deterministic difference. The metric can be used to assess the overall performance of a model against all the experimental observations in the validation domain and it can be extrapolated to express predictive capability of the model under conditions for which direct experimental observations are not available. We apply the metric and the scheme for characterizing predictive capability to the thermal problem. (C) 2007 Elsevier B.V. All rights reserved.
C1 [Oberkampf, William L.] Sandia Natl Labs, Validat & Uncertainty Estimat Dept, Dept 1544, Albuquerque, NM 87185 USA.
[Ginzburg, Lev] SUNY Stony Brook, Dept Ecol & Evolut, Stony Brook, NY 11794 USA.
RP Ferson, S (reprint author), 100 N Country Rd, Setauket, NY 11733 USA.
EM scott@ramas.com
NR 40
TC 62
Z9 69
U1 1
U2 11
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0045-7825
J9 COMPUT METHOD APPL M
JI Comput. Meth. Appl. Mech. Eng.
PY 2008
VL 197
IS 29-32
BP 2408
EP 2430
DI 10.1016/j.cma.2007.07.030
PG 23
WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary
Applications; Mechanics
SC Engineering; Mathematics; Mechanics
GA 315CR
UT WOS:000256856000006
ER
PT J
AU Hills, RG
Dowding, KJ
AF Hills, Richard G.
Dowding, Kevin J.
TI Multivariate approach to the thermal challenge problem
SO COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
LA English
DT Article; Proceedings Paper
CT Validation Methodology Workshop
CY MAY 22-23, 2006
CL Albuquerque, NM
SP Sandia Natl Lab
DE validation; multivariate statistics; uncertainty
ID COMPUTATIONAL FLUID-DYNAMICS; CODE VERIFICATION; MODEL VALIDATION;
UNCERTAINTY; SENSITIVITY; SIMULATION
AB This paper presents an engineering approach to the thermal challenge problem defined by Dowding et al. (this issue). This approach to model validation is based on a multivariate validation metric that accounts for model parameter uncertainty and correlation between multiple measurement/prediction differences. The effect of model parameter uncertainty is accounted for through first-order sensitivity analysis for the ensemble/validation tests, and first-order sensitivity analysis and Monte-Carlo analysis for the regulatory prediction. While sensitivity based approaches are less computational expensive than Monte-Carlo approaches, they are less likely to capture the far tail behavior of even mildly nonlinear models.
The application of the sensitivity based validation metric provided strong evidence that the tested model was not consistent with the experimental data. The use of a temperature dependent effective conductivity with the linear model resulted in model predictions that were consistent with the data. The correlation structure of the model was used to pool the prediction/measurement differences to evaluate the corresponding cumulative density function (CDF). Both the experimental CDF and the predicted CDFs indicated that the regulatory criterion was not met. Published by Elsevier B.V.
C1 [Hills, Richard G.] New Mexico State Univ, Dept Mech Engn, Dept 3450, Las Cruces, NM 88003 USA.
[Dowding, Kevin J.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Hills, RG (reprint author), New Mexico State Univ, Dept Mech Engn, Dept 3450, POB 3001, Las Cruces, NM 88003 USA.
EM rhills@nmsu.edu
NR 36
TC 12
Z9 15
U1 0
U2 5
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0045-7825
EI 1879-2138
J9 COMPUT METHOD APPL M
JI Comput. Meth. Appl. Mech. Eng.
PY 2008
VL 197
IS 29-32
BP 2442
EP 2456
DI 10.1016/j.cma.2007.09.027
PG 15
WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary
Applications; Mechanics
SC Engineering; Mathematics; Mechanics
GA 315CR
UT WOS:000256856000008
ER
PT J
AU Rutherford, BM
AF Rutherford, Brian M.
TI Computational modeling issues and methods for the "regulatory problem"
in engineering - Solution to the thermal problem
SO COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
LA English
DT Article; Proceedings Paper
CT Validation Methodology Workshop
CY MAY 22-23, 2006
CL Albuquerque, NM
SP Sandia Natl Lab
DE regulatory problem; calibration; model validation; model-based
prediction
ID INPUT VARIABLES
AB Many of the problems addressed through engineering analysis include a set of regulatory (or other) probabilistic requirements that must be demonstrated with some degree of confidence through the analysis. Problems cast in this environment can pose new challenges for computational analyses in both model validation and model-based prediction. The "regulatory problems" given for the "Sandia challenge problems exercise", while relatively simple, provide an opportunity to demonstrate methods that address these challenges. This paper describes and illustrates a method for prediction in situations where extrapolation is involved. Specifically, we discuss methodology for compensating for computational/experimental discrepancies identified in the validation analysis. This includes the description of an approach that can be applied when the required prediction involves extrapolation along axes that are difficult to express in Euclidian space (different structures, for example). These methods are illustrated using the Sandia thermal challenge problem. Published by Elsevier B.V.
C1 Sandia Natl Labs, Independent Surveillance Assessment & Stat Dept, Albuquerque, NM 87185 USA.
RP Rutherford, BM (reprint author), Sandia Natl Labs, Independent Surveillance Assessment & Stat Dept, POB 5800, Albuquerque, NM 87185 USA.
EM bmruthe@sandia.gov
NR 8
TC 7
Z9 9
U1 0
U2 0
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0045-7825
J9 COMPUT METHOD APPL M
JI Comput. Meth. Appl. Mech. Eng.
PY 2008
VL 197
IS 29-32
BP 2480
EP 2489
DI 10.1016/j.cma.2007.08.030
PG 10
WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary
Applications; Mechanics
SC Engineering; Mathematics; Mechanics
GA 315CR
UT WOS:000256856000011
ER
PT J
AU Hills, RG
Dowding, KJ
Swiler, L
AF Hills, R. G.
Dowding, K. J.
Swiler, L.
TI Thermal challenge problem: Summary
SO COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
LA English
DT Article; Proceedings Paper
CT Validation Methodology Workshop
CY MAY 22-23, 2006
CL Albuquerque, NM
SP Sandia Natl Lab
DE validation; modeling; simulation
AB This paper summarizes the approaches used to address the thermal validation challenge problem. The approaches differ in their characterization of the thermal properties and uncertainty, the definitions and use of validation metrics, the use of validation experimental data to characterize or improve the model predictions, and the assessment of regulatory compliance. All approaches estimated regulatory failure with the resulting estimated probabilities varying by an order of magnitude. Published by Elsevier B.V.
C1 [Hills, R. G.] New Mexico State Univ, Las Cruces, NM 88003 USA.
[Dowding, K. J.; Swiler, L.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Hills, RG (reprint author), New Mexico State Univ, POB 30001, Las Cruces, NM 88003 USA.
EM rhills@nmsu.edu
NR 11
TC 4
Z9 6
U1 2
U2 3
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0045-7825
J9 COMPUT METHOD APPL M
JI Comput. Meth. Appl. Mech. Eng.
PY 2008
VL 197
IS 29-32
BP 2490
EP 2495
DI 10.1016/j.cma.2007.07.032
PG 6
WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary
Applications; Mechanics
SC Engineering; Mathematics; Mechanics
GA 315CR
UT WOS:000256856000012
ER
PT J
AU Grigoriu, MD
Field, RV
AF Grigoriu, M. D.
Field, R. V., Jr.
TI A solution to the static frame validation challenge problem using
Bayesian model selection
SO COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
LA English
DT Article; Proceedings Paper
CT Validation Methodology Workshop
CY MAY 22-23, 2006
CL Albuquerque, NM
SP Sandia Natl Lab
DE Bayesian analysis; model selection; model validation; random fields
AB We provide a solution to the static frame validation challenge problem (see this issue) in a manner that is consistent with the guidelines provided by the Validation Challenge Workshop tasking document. The static frame problem is constructed such that variability in material properties is known to be the only source of uncertainty in the system description, but there is ignorance on the type of model that best describes this variability. Hence both types of uncertainty, aleatoric and epistemic, are present and must be addressed. Our approach is to consider a collection of competing probabilistic models for the material properties, and calibrate these models to the information provided; models of different levels of complexity and numerical efficiency are included in the analysis. A Bayesian formulation is used to select the optimal model from the collection, which is then used for the regulatory assessment. Bayesian credible intervals are used to provide a measure of confidence to our regulatory assessment. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Grigoriu, M. D.] Cornell Univ, Ithaca, NY 14853 USA.
[Field, R. V., Jr.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Grigoriu, MD (reprint author), Cornell Univ, 369 Hollister Hall, Ithaca, NY 14853 USA.
EM mdg12@cornell.edu; rvfield@sandia.gov
OI Field, Richard/0000-0002-2765-7032
NR 11
TC 5
Z9 5
U1 0
U2 1
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0045-7825
J9 COMPUT METHOD APPL M
JI Comput. Meth. Appl. Mech. Eng.
PY 2008
VL 197
IS 29-32
BP 2540
EP 2549
DI 10.1016/j.cma.2007.09.023
PG 10
WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary
Applications; Mechanics
SC Engineering; Mathematics; Mechanics
GA 315CR
UT WOS:000256856000016
ER
PT J
AU Red-Horse, JR
Paez, TL
AF Red-Horse, J. R.
Paez, T. L.
TI Sandia National Laboratories Validation Workshop: Structural dynamics
application
SO COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
LA English
DT Article; Proceedings Paper
CT Validation Methodology Workshop
CY MAY 22-23, 2006
CL Albuquerque, NM
SP Sandia Natl Lab
DE structural dynamics; model validation; Sandia national laboratories
validation challenge workshop
AB This article specifies a virtual structural dynamic subsystem and some systems, as well as mathematical models that approximately simulate them. The purpose is to define a setting for model validations conceived by participants in the Sandia National Laboratories Validation Workshop. Some broad guidelines for the model validations are set, as well as a regulatory requirement to be satisfied by the target system. Participants are directed to present techniques for subsystem model validation, to analytically predict whether or not the regulatory requirement will be met, and to estimate the likelihood of accuracy of the prediction. Published by Elsevier B.V.
C1 [Red-Horse, J. R.; Paez, T. L.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Paez, TL (reprint author), Sandia Natl Labs, Mail Stop 0828, Albuquerque, NM 87185 USA.
EM tlpaez@sandia.gov
NR 5
TC 20
Z9 24
U1 0
U2 3
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0045-7825
J9 COMPUT METHOD APPL M
JI Comput. Meth. Appl. Mech. Eng.
PY 2008
VL 197
IS 29-32
BP 2578
EP 2584
DI 10.1016/j.cma.2007.09.031
PG 7
WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary
Applications; Mechanics
SC Engineering; Mathematics; Mechanics
GA 315CR
UT WOS:000256856000020
ER
PT J
AU Ghanem, RG
Doostan, A
Red-Horse, J
AF Ghanem, Roger G.
Doostan, Allreza
Red-Horse, John
TI A probabilistic construction of model validation
SO COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
LA English
DT Article; Proceedings Paper
CT Validation Methodology Workshop
CY MAY 22-23, 2006
CL Albuquerque, NM
SP Sandia Natl Lab
DE model validation; uncertainty quantification; maximum likelihood
ID MAXIMUM-LIKELIHOOD-ESTIMATION; CHAOS REPRESENTATIONS;
STOCHASTIC-PROCESSES; POLYNOMIAL CHAOS; POROUS-MEDIA; UNCERTAINTY;
PROPAGATION; FLOW; INFORMATION; ALGORITHM
AB We describe a procedure to assess the predictive accuracy of process models subject to approximation error and uncertainty. The proposed approach is a functional analysis-based probabilistic approach for which we represent random quantities using polynomial chaos expansions (PCEs). The approach permits the formulation of the uncertainty assessment in validation, a significant component of the process, as a problem of approximation theory. It has two essential parts. First, a statistical procedure is implemented to calibrate uncertain parameters of the candidate model from experimental or model-based measurements. Such a calibration technique employs PCEs to represent the inherent uncertainty of the model parameters. Based on the asymptotic behavior of the statistical parameter estimator, the associated PCE coefficients are then characterized as independent random quantities to represent epistemic uncertainty due to lack of information. Second, a simple hypothesis test is implemented to explore the validation of the computational model assumed for the physics of the problem. The above validation path is implemented for the case of dynamical system validation challenge exercise. (C) 2007 Elsevier B.V. All rights reserved.
C1 [Ghanem, Roger G.] Univ So Calif, Los Angeles, CA 90089 USA.
[Doostan, Allreza] Stanford Univ, Dept Mech Engn, Stanford, CA 94305 USA.
[Red-Horse, John] Sandia Natl Labs, Validat & Uncertainty Quantificat Dept, Albuquerque, NM 87185 USA.
RP Ghanem, RG (reprint author), Univ So Calif, 210 KAP Hall, Los Angeles, CA 90089 USA.
EM ghanem@usc.edu; doostan@stan-ford.edu; jrredho@sandia.gov
RI Ghanem, Roger/B-8570-2008
OI Ghanem, Roger/0000-0002-1890-920X
NR 47
TC 29
Z9 30
U1 0
U2 5
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0045-7825
J9 COMPUT METHOD APPL M
JI Comput. Meth. Appl. Mech. Eng.
PY 2008
VL 197
IS 29-32
BP 2585
EP 2595
DI 10.1016/j.cma.2007.08.029
PG 11
WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary
Applications; Mechanics
SC Engineering; Mathematics; Mechanics
GA 315CR
UT WOS:000256856000021
ER
PT J
AU Rutherford, BM
AF Rutherford, Brian M.
TI Computational modeling issues and methods for the "regulatory problem"
in engineering - Solutions to the structural dynamics and static frame
problems
SO COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
LA English
DT Article; Proceedings Paper
CT Validation Methodology Workshop
CY MAY 22-23, 2006
CL Albuquerque, NM
SP Sandia Natl Lab
DE regulatory problem; calibration; model validation; model-based
prediction
ID INPUT VARIABLES
AB Many of the problems addressed through engineering analysis include a set of regulatory (or other) probabilistic requirements that must be demonstrated with some degree of confidence through the analysis. Problems cast in this environment can pose new challenges for computational analyses in both model validation and model-based prediction. The "regulatory problems" given for the "Sandia challenge problems exercise", while relatively simple, provide an opportunity to demonstrate methods that address these challenges. This paper describes and illustrates methods that can be useful in analysis of the regulatory problem. Specifically, we discuss:
(1) an approach for quantifying variability and uncertainty separately to assess the regulatory requirements and provide a statement of confidence; and
(2) a general validation metric to focus the validation process on a specific range of the predictive distribution (the predictions near the regulatory threshold). These methods are illustrated using the challenge problems. Solutions are provided for both the static frame and structural dynamics problems. Published by Elsevier B.V.
C1 Sandia Natl Labs, Independent Surveillance Assessment & Stat Dept, Albuquerque, NM 87185 USA.
RP Rutherford, BM (reprint author), Sandia Natl Labs, Independent Surveillance Assessment & Stat Dept, POB 5800, Albuquerque, NM 87185 USA.
EM bmruthe@sandia.gov
NR 9
TC 5
Z9 6
U1 2
U2 3
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0045-7825
J9 COMPUT METHOD APPL M
JI Comput. Meth. Appl. Mech. Eng.
PY 2008
VL 197
IS 29-32
BP 2632
EP 2644
DI 10.1016/j.cma.2007.07.033
PG 13
WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary
Applications; Mechanics
SC Engineering; Mathematics; Mechanics
GA 315CR
UT WOS:000256856000025
ER
PT J
AU Paez, TL
Red-Horse, J
AF Paez, Thomas L.
Red-Horse, John
TI Structural dynamics challenge problem: Summary
SO COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
LA English
DT Article; Proceedings Paper
CT Validation Methodology Workshop
CY MAY 22-23, 2006
CL Albuquerque, NM
SP Sandia Natl Lab
DE validation; structural dynamics; challenge problem
AB The six papers in this special issue that develop solutions to the Structural Dynamics Challenge Problem are summarized herein. The goal is to emphasize different tools and approaches applied to various parts of the structural dynamics problem. Specifically the following issues are considered: (1) Development of a mathematical framework for uncertainty quantification of a substructure. (2) Calibration of a mathematical model for the substructure. (3) Validation of the substructure mathematical model. (4) Use of the mathematical model of the substructure, in conjunction with another structure, to make a prediction of the probability that a regulatory limit is surpassed, and discussion of the uncertainty of the prediction. Different methodologies are presented and specific results vary, however, conclusions regarding satisfaction of the regulatory requirement match. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Paez, Thomas L.; Red-Horse, John] Sandia Natl Labs, Dept 1544, Albuquerque, NM 87185 USA.
RP Paez, TL (reprint author), Sandia Natl Labs, Dept 1544, POB 5800,MS0557, Albuquerque, NM 87185 USA.
EM tlpaez@sandia.gov
NR 9
TC 7
Z9 10
U1 2
U2 9
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0045-7825
J9 COMPUT METHOD APPL M
JI Comput. Meth. Appl. Mech. Eng.
PY 2008
VL 197
IS 29-32
BP 2660
EP 2665
DI 10.1016/j.cma.2007.09.026
PG 6
WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary
Applications; Mechanics
SC Engineering; Mathematics; Mechanics
GA 315CR
UT WOS:000256856000027
ER
PT J
AU Ross, MR
Felippa, CA
Park, KC
Sprague, MA
AF Ross, Michael R.
Felippa, Carlos A.
Park, K. C.
Sprague, Michael A.
TI Treatment of acoustic fluid-structure interaction by localized Lagrange
multipliers: Formulation
SO COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
LA English
DT Article
DE coupled systems; fluid-structure interaction; earthquake dynamics;
partitioned analysis; non-matching meshes; Lagrange multipliers
ID COUPLED AEROELASTIC PROBLEMS; FINITE-ELEMENT ANALYSIS; SOLID SYSTEMS;
CAVITATION; CONSTRUCTION; CONSERVATION; INTERFACES; ALGORITHM
AB A new concept is presented for modeling the dynamic interaction between an acoustic fluid and an elastic structure. The coupling of this multiphysics system is done by inserting a kinematic interface frame between the fluid and the structure, and using node-collocated Lagrange multipliers to connect the frame to each subsystem. The time-domain response analysis is performed by a partitioned analysis procedure. The main advantages of this localized Lagrange multiplier (LLM) primal-dual coupling method are: complete localization of the structure and fluid subsystems, elimination of the conventional predictor in the partitioned time integration method, and the ability to accommodate non-matching meshes. The standard Newmark time integrator is used on both the fluid and structure models. It is shown that if the integrator is A-stable and second-order accurate for a monolithic treatment, it retains those properties for both Mortar and LLM partitioned solution procedures. Infinite and finite piston problems are used to explain and verify the methodology. A sequel paper under preparation presents and discusses a set of benchmark and application examples that involve the response of existing dams to seismic excitation. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Ross, Michael R.] Sandia Natl Labs, Analyt Struct Dynam Dept, Albuquerque, NM 87185 USA.
[Felippa, Carlos A.; Park, K. C.] Univ Colorado, Dept Aerosp Engn Sci, Boulder, CO 80309 USA.
[Felippa, Carlos A.; Park, K. C.] Univ Colorado, Ctr Aerosp Struct, Boulder, CO 80309 USA.
[Sprague, Michael A.] Univ Calif, Sch Nat Sci, Merced, CA 95344 USA.
RP Ross, MR (reprint author), Sandia Natl Labs, Analyt Struct Dynam Dept, POB 5800,MS 0346, Albuquerque, NM 87185 USA.
EM mross11a@gmail.com
RI park, k.c./E-8898-2010
NR 50
TC 22
Z9 24
U1 0
U2 10
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0045-7825
J9 COMPUT METHOD APPL M
JI Comput. Meth. Appl. Mech. Eng.
PY 2008
VL 197
IS 33-40
BP 3057
EP 3079
DI 10.1016/j.cma.2008.02.017
PG 23
WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary
Applications; Mechanics
SC Engineering; Mathematics; Mechanics
GA 326NO
UT WOS:000257666400025
ER
PT J
AU Park, HS
Fang, HE
Fish, J
Huang, HC
AF Park, Harold S.
Fang, H. Eliot
Fish, Jacob
Huang, Hanchen
TI Recent advances in computational study of nanostructures
SO COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
LA English
DT Editorial Material
C1 [Park, Harold S.] Univ Colorado, Boulder, CO 80309 USA.
[Fang, H. Eliot] Sandia Natl Labs, Livermore, CA 94550 USA.
[Fish, Jacob; Huang, Hanchen] Rensselaer Polytech Inst, Troy, NY 12181 USA.
RP Park, HS (reprint author), Univ Colorado, Boulder, CO 80309 USA.
EM harold@colorado.edu
RI Huang, Hanchen/A-9323-2008
NR 0
TC 0
Z9 0
U1 0
U2 2
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0045-7825
J9 COMPUT METHOD APPL M
JI Comput. Meth. Appl. Mech. Eng.
PY 2008
VL 197
IS 41-42
BP 3173
EP 3173
DI 10.1016/j.cma.2008.03.018
PG 1
WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary
Applications; Mechanics
SC Engineering; Mathematics; Mechanics
GA 345FN
UT WOS:000258981600001
ER
PT J
AU Wagner, GJ
Jones, RE
Templeton, JA
Parks, ML
AF Wagner, G. J.
Jones, R. E.
Templeton, J. A.
Parks, M. L.
TI An atomistic-to-continuum coupling method for heat transfer in solids
SO COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
LA English
DT Article
DE atomistic-to-continuum coupling; heat transfer; finite elements;
multi-scale simulations
ID MOLECULAR-DYNAMICS SIMULATIONS; TEMPERATURE; COMPUTER; ARGON; FLOW
AB In this work, we present a seamless, energy-conserving method to couple atomistic and continuum representations of a temperature field in a material. This technique allows a molecular dynamics simulation to be used in localized regions of the computational domain, surrounded and overlaid by a continuum finite element representation. Thermal energy can pass between the two regions in either direction, making larger simulations of nano-scale thermal processes possible. We discuss theoretical developments and numerical implementation details. In addition, we present and analyze a set of representative simulations. Published by Elsevier B.V.
C1 [Wagner, G. J.; Templeton, J. A.] Sandia Natl Labs, Fluid Thermal Sci & Engn Dept, Livermore, CA 94551 USA.
[Jones, R. E.] Sandia Natl Labs, Mech Mat Dept, Livermore, CA 94551 USA.
[Parks, M. L.] Sandia Natl Labs, Applied Math & Applicat Dept, Albuquerque, NM 87123 USA.
RP Wagner, GJ (reprint author), Sandia Natl Labs, Fluid Thermal Sci & Engn Dept, Livermore, CA 94551 USA.
EM gjwagne@sandia.gov; rjones@sandia.gov; jatempl@sandia.gov;
mlparks@sandia.gov
RI Parks, Michael/A-2878-2008; Wagner, Gregory/I-4377-2015
FU United States Department of Energy [DE-AC04-94AL85000]
FX Sandia is a multiprogram laboratory operated by Sandia Corporation, a
Lockheed Martin Company, for the United States Department of Energy
under contract DE-AC04-94AL85000. We are grateful for helpful
discussions with Rich Lehoucq, Pavel Bochev, Alex Slepoy and Jon
Zimmerman in the development of this work and preparation of the
manuscript.
NR 33
TC 27
Z9 28
U1 2
U2 22
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0045-7825
J9 COMPUT METHOD APPL M
JI Comput. Meth. Appl. Mech. Eng.
PY 2008
VL 197
IS 41-42
BP 3351
EP 3365
DI 10.1016/j.cma.2008.02.004
PG 15
WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary
Applications; Mechanics
SC Engineering; Mathematics; Mechanics
GA 345FN
UT WOS:000258981600014
ER
PT J
AU Battaile, CC
AF Battaile, Corbett C.
TI The kinetic Monte Carlo method: Foundation, implementation, and
application
SO COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
LA English
DT Article
DE Monte Carlo; simulation; vacancy diffusion; grain growth; thin him
ID VAPOR-DEPOSITION; CRYSTAL-GROWTH; SIMULATION; SYSTEMS; SURFACES
AB The Kinetic Monte Carlo method provides a simple yet powerful and flexible tool for exercising the concerted action of fundamental, stochastic, physical mechanisms to create a model of the phenomena that they produce. This manuscript contains an overview of the theory behind the method, some simple examples to illustrate its implementation, and a technologically relevant application of the method to model the refinement of grains during polycrystalline thin film deposition. The objective is to provide an introduction to the method and its basics, and to present useful examples that might be followed to achieve its implementation for solving practical problems. (c) 2008 Elsevier B.V. All rights reserved.
C1 Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Battaile, CC (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM ccbatta@sandia.gov
NR 22
TC 53
Z9 57
U1 3
U2 39
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0045-7825
EI 1879-2138
J9 COMPUT METHOD APPL M
JI Comput. Meth. Appl. Mech. Eng.
PY 2008
VL 197
IS 41-42
BP 3386
EP 3398
DI 10.1016/j.cma.2008.03.010
PG 13
WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary
Applications; Mechanics
SC Engineering; Mathematics; Mechanics
GA 345FN
UT WOS:000258981600017
ER
PT J
AU Lin, G
Su, CH
Karniadakis, GE
AF Lin, G.
Su, C. -H.
Karniadakis, G. E.
TI Stochastic modeling of random roughness in shock scattering problems:
Theory and simulations
SO COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
LA English
DT Article
DE supersonic flow; uncertainty quantification; multi-element probabilistic
collocation method; sparse grids
ID DIFFERENTIAL-EQUATIONS; ORTHOGONAL POLYNOMIALS; SOBOLEV SPACES;
REFLECTION; WEDGE; CHAOS
AB Random roughness is omnipresent in engineering applications and may often affect performance in unexpected way. Here, we employ synergistically stochastic simulations and second-order stochastic perturbation analysis to study supersonic flow past a wedge with random rough surface. The roughness (of length d) starting at the wedge apex is modeled as stochastic process (with zero mean and correlation length A) obtained from a new stochastic differential equation. A multi-element probabilistic collocation method (ME-PCM) on sparse grids is employed to solve the stochastic Euler equations while a WENO scheme is used to discretize the equations in two spatial dimensions. The perturbation analysis is used to verify the stochastic simulations and to provide insight for small values of A, where stochastic simulations become prohibitively expensive. We show that the random roughness enhances the lift and drag forces on the wedge beyond the rough region, and this enhancement is proportional to (d/A)(2). The effects become more pronounced as the Mach number increases. These results can be used in designing smart rough skins for airfoils for maximum lift enhancement at a minimum drag penalty. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Su, C. -H.; Karniadakis, G. E.] Brown Univ, Div Appl Math, Providence, RI 02912 USA.
[Lin, G.] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Karniadakis, GE (reprint author), Brown Univ, Div Appl Math, Providence, RI 02912 USA.
EM gk@dam.brown.edu
RI Lin, Guang/D-1376-2011
NR 24
TC 15
Z9 15
U1 0
U2 0
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0045-7825
J9 COMPUT METHOD APPL M
JI Comput. Meth. Appl. Mech. Eng.
PY 2008
VL 197
IS 43-44
BP 3420
EP 3434
DI 10.1016/j.cma.2008.02.025
PG 15
WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary
Applications; Mechanics
SC Engineering; Mathematics; Mechanics
GA 347IB
UT WOS:000259132700002
ER
PT J
AU Lim, H
Yu, Y
Jin, H
Kim, D
Lee, H
Glimm, J
Li, XL
Sharp, DH
AF Lim, H.
Yu, Y.
Jin, H.
Kim, D.
Lee, H.
Glimm, J.
Li, X-L
Sharp, D. H.
TI Multiscale models for fluid mixing
SO COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
LA English
DT Article
DE turbulence; multiphase flow; averaged equations; closure; subgrid models
ID CONSERVATIVE FRONT TRACKING; RAYLEIGH-TAYLOR INSTABILITY; LARGE-EDDY
SIMULATION; 2-PHASE FLOW MODELS; DIMENSIONS
AB Recent work of the authors and colleagues on the turbulent mixing of compressible fluids is developed and extended with an emphasis on the multiscale aspects of this work. Specifically, we study an interplay between micro and macro aspects of mixing. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Lim, H.; Yu, Y.; Kim, D.; Glimm, J.; Li, X-L] SUNY Stony Brook, Dept Appl Math & Stat, Stony Brook, NY 11794 USA.
[Jin, H.] Cheju Natl Univ, Dept Math, Cheju 690756, South Korea.
[Lee, H.] Univ Illinois, Urbana, IL 61801 USA.
[Glimm, J.] Brookhaven Natl Lab, Computat Sci Ctr, Upton, NY 11793 USA.
[Sharp, D. H.] Los Alamos Natl Lab, Los Alamos, NM USA.
RP Yu, Y (reprint author), SUNY Stony Brook, Dept Appl Math & Stat, Stony Brook, NY 11794 USA.
EM hyulim@ams.sunysb.edu; yan2000@ams.sunysb.edu; hjin@cheju.ac.kr;
boscokim@ams.sunysb.edu; hslee@ams.sunysb.edu; glimm@ams.sunysb.edu;
linli@ams.sunysb.edu; dcso@lanl.gov
NR 44
TC 8
Z9 9
U1 0
U2 4
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0045-7825
J9 COMPUT METHOD APPL M
JI Comput. Meth. Appl. Mech. Eng.
PY 2008
VL 197
IS 43-44
BP 3435
EP 3444
DI 10.1016/j.cma.2008.02.027
PG 10
WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary
Applications; Mechanics
SC Engineering; Mathematics; Mechanics
GA 347IB
UT WOS:000259132700003
ER
PT J
AU Scherzinger, WM
Dohrmann, CR
AF Scherzinger, W. M.
Dohrmann, C. R.
TI A robust algorithm for finding the eigenvalues and eigenvectors of 3 x 3
symmetric matrices
SO COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
LA English
DT Article
DE eigenvalues; eigenvectors; principal coordinates
ID SQUARE-ROOT
AB Many concepts in continuum mechanics are most easily understood in principal coordinates; using these concepts in a numerical analysis requires a robust algorithm for finding the eigenvalues and eigenvectors of 3 x 3 symmetric matrices. A robust algorithm for solving this eigenvalue problem is presented along with an analysis of the algorithm. The special case of two or three nearly identical eigenvalues is examined in detail using an asymptotic analysis. Numerical results are shown that compare this algorithm with existing methods found in the literature. The behavior of this algorithm is shown to be more reliable than the other methods with a minimal computational cost. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Scherzinger, W. M.; Dohrmann, C. R.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Scherzinger, WM (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM wmscher@sandia.gov
FU Sandia Corporation; Lockheed Mar-tin Company; United States Department
of Energy [DE-AC04-94AL85000]
FX Sandia is a multiprogram laboratory operated by Sandia Corporation, a
Lockheed Mar-tin Company, for the United States Department of Energy
under contract DE-AC04-94AL85000.
NR 8
TC 4
Z9 4
U1 1
U2 3
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0045-7825
J9 COMPUT METHOD APPL M
JI Comput. Meth. Appl. Mech. Eng.
PY 2008
VL 197
IS 45-48
BP 4007
EP 4015
DI 10.1016/j.cma.2008.03.031
PG 9
WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary
Applications; Mechanics
SC Engineering; Mathematics; Mechanics
GA 356AH
UT WOS:000259750600034
ER
PT J
AU Badia, S
Quaini, A
Quarteroni, A
AF Badia, Santiago
Quaini, Annalisa
Quarteroni, Alfio
TI Modular vs. non-modular preconditioners for fluid-structure systems with
large added-mass effect
SO COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
LA English
DT Article
DE Fluid-structure interaction; Partitioned procedures; Preconditioners;
Semi-implicit coupling; Added-mass effect; Hemodynamics
ID FINITE-ELEMENT APPROXIMATION; ALGORITHMS; FORMULATION; SOLVER; FLOWS
AB In this article we address the numerical simulation of fluid-structure interaction (FSI) problems featuring large added-mass effect. We analyze different preconditioners for the coupled system matrix obtained after space-time discretization and linearization of the FSI problem. The classical Dirichlet-Neumann preconditioner has the advantage of "modularity" because it allows to reuse existing fluid and structure codes with minimum effort (simple interface communication). Unfortunately, its performance is very poor in case of large added-mass effects. Alternatively, we consider two non-modular approaches. The first one consists in preconditioning the coupled system with a suitable diagonal scaling combined with an [LUT preconditioner. The system is then solved by a Krylov method. The drawback of this procedure is that the combination of fluid and structure codes to solve the coupled system is not straightforward. The second non-modular approach we consider is a splitting technique based on an inexact block-LU factorization of the linear FSI system. The resulting algorithm computes the fluid velocity separately from the coupled pressure-structure system at each iteration, reducing the computational cost. Independently of the preconditioner, the efficiency of semi-implicit algorithms (i.e., those that treat geometric and fluid nonlinearities in an explicit way) is highlighted and their performance compared to the one of implicit algorithms. All the methods are tested on three-dimensional blood-vessel systems. The algorithm combining the non-modular ILUT preconditioner with Krylov methods proved to be the fastest. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Badia, Santiago] Univ Politecn Cataluna, CIMNE, ES-08034 Barcelona, Spain.
[Badia, Santiago] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Quaini, Annalisa; Quarteroni, Alfio] Ecole Polytech Fed Lausanne, IACS, Chair Modeling & Sci Comp, CH-1015 Lausanne, Switzerland.
[Quarteroni, Alfio] Politecn Milan, Dipartimento Matemat F Brioschi, MOX, I-20133 Milan, Italy.
RP Badia, S (reprint author), Univ Politecn Cataluna, CIMNE, Jordi Girona 1-3,Edifici C1, ES-08034 Barcelona, Spain.
EM sbadia@cimne.upc.edu; annalisa.quaini@epfl.ch; alfio.quarteroni@epfl.ch
RI Quarteroni, Alfio/E-6873-2015; Badia, Santiago/L-8565-2014
OI Quarteroni, Alfio/0000-0002-5947-6885; Badia,
Santiago/0000-0003-2391-4086
FU European Community through the Marie Curie [MOIF-CT-2006-039522]; Swiss
National Science Foundation [200021-109378/1]
FX Santiago Badia acknowledges the support of the European Community
through the Marie Curie contract NanoSim (MOIF-CT-2006-039522). Annalisa
Quaini acknowledges the support of the Swiss National Science Foundation
under Grant 200021-109378/1.
NR 36
TC 58
Z9 58
U1 2
U2 6
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0045-7825
J9 COMPUT METHOD APPL M
JI Comput. Meth. Appl. Mech. Eng.
PY 2008
VL 197
IS 49-50
BP 4216
EP 4232
DI 10.1016/j.cma.2008.04.018
PG 17
WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary
Applications; Mechanics
SC Engineering; Mathematics; Mechanics
GA 370LW
UT WOS:000260764700012
ER
PT J
AU Monville, ME
Lamb, JD
Pereira, JCG
Truter, JA
AF Monville, M. E.
Lamb, J. D.
Pereira, J. C. G.
Truter, J. A.
TI Simulation of laser-induced nanopattern formation
SO COMPUTER PHYSICS COMMUNICATIONS
LA English
DT Article
DE diffusion; thin-film; physical vapor deposition; substrate;
nanofabrication; laser optics
ID STANDING-WAVE; DEPOSITION; MOTION; LIGHT; ATOMS
AB Over the last decade it has been shown theoretically and experimentally that a near-resonant standing wave light field can be used during deposition to deflect collimated neutral atoms, thereby constraining them to form periodic structures. Another effect studied in recent experiments is that a laser interference pattern in contact with a substrate can also result in patterns mimicking the interference fringes. This patterning has tentatively been attributed to thermal gradients resulting from non-uniform heating induced by the interference patterns. We developed a model and a computer program to investigate the possibility of making these two laser effects interact constructively to refine the resolution. The simulations proceed in two stages: first, atom trajectories in a laser field are simulated using classical-mechanical equations of motion in an effective potential to obtain the deposition profile; then, the obtained profile is used as an input in a kinetic Monte Carlo (KMC) simulation of atom diffusion on a substrate with spatially varying temperature. Our results show substantial improvement in quality of the patterns compared to that achieved by using either effect alone. We examine many growth conditions in addition to the different laser parameter settings for optimal constructive interference of the two effects. The computer code used in the simulations is designed to run efficiently on both simple PC platforms and supercomputers; its design, data structures used and other features are described in detail. (c) 2007 Elsevier B.V. All rights reserved.
C1 Univ Aberdeen, Sch Business, Kings Coll, Aberdeen AB24 3QY, Scotland.
[Monville, M. E.] Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA.
[Monville, M. E.] Washington Univ, Dept Phys, St Louis, MO 63130 USA.
[Pereira, J. C. G.] Inst Super Tecn, Dept Mat Engn, Lisbon, Portugal.
[Truter, J. A.] TruSoft Software, ZA-7536 Tyger Valley, South Africa.
RP Lamb, JD (reprint author), Univ Aberdeen, Sch Business, Kings Coll, Aberdeen AB24 3QY, Scotland.
EM J.D.Lamb@abdn.ac.uk
RI Lamb, John/J-7870-2012
OI Lamb, John/0000-0002-5849-7772
NR 17
TC 0
Z9 0
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0010-4655
EI 1879-2944
J9 COMPUT PHYS COMMUN
JI Comput. Phys. Commun.
PD JAN 1
PY 2008
VL 178
IS 1
BP 40
EP 47
DI 10.1016/j.cpc.2007.08.011
PG 8
WC Computer Science, Interdisciplinary Applications; Physics, Mathematical
SC Computer Science; Physics
GA 257IS
UT WOS:000252793000005
ER
PT J
AU Ballentine, GE
Bertsch, GF
Onishi, N
Yabana, K
AF Ballentine, G. E.
Bertsch, G. F.
Onishi, N.
Yabana, K.
TI Moment distributions of clusters and molecules in the adiabatic rotor
model
SO COMPUTER PHYSICS COMMUNICATIONS
LA English
DT Article
DE molecular spectra; dipole moments; atomic clusters
ID ELECTRIC-DIPOLE POLARIZABILITIES; FERROMAGNETIC CLUSTERS; MAGNETIZATION
AB We present a Fortran program to compute the distribution of dipole moments of free particles for use in analyzing molecular beams experiments that measure moments by deflection in an inhomogeneous field. The theory is the same for magnetic and electric dipole moments, and is based on a thermal ensemble of classical particles that are free to rotate and that have moment vectors aligned along a principal axis of rotation. The theory has two parameters, the ratio of the magnetic (or electric) dipole energy to the thermal energy, and the ratio of moments of inertia of the rotor.
Program summary
Program title: AdiabaticRotor
Catalogue identifier: ADZO_v1_0
Program summary URL: http://cpc.cs.qub.ac.uk/summaries/ADZO_v1_0.html
Program obtainable from: CPC Program Library, Queen's University, Belfast, N. Ireland
Licensing provisions: Standard CPC licence, http://cpc.cs.qub.ac.uk/licence/licence.html
No. of lines in distributed program, including test data, etc.: 479
No. of bytes in distributed program, including test data, etc.: 4853
Distribution format: tar.gz
Programming language: Fortran 90
Computer: Pentium-IV, Macintosh Power PC G4
Operating system: Linux, Mac OS X
RAM: 600 Kbytes
Word size: 64 bits
Classification: 2.3
Nature of problem: The system considered is a thermal ensemble of rotors having a magnetic or electric moment aligned along one of the principal axes. The ensemble is placed in an external field which is turned on adiabatically. The problem is to find the distribution of moments in the presence of the external field.
Solution method: There are three adiabatic invariants. The only nontrivial one is the action associated with the polar angle of the rotor axis with respect to external field. It is found by Newton's method.
Running time: 3 min on a 3 GHz Pentium IV processor. Published by Elsevier B.V.
C1 Univ Washington, Inst Nucl Theory, Seattle, WA 98195 USA.
[Ballentine, G. E.] Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA.
[Onishi, N.] Tokyo Int Univ, Saitama 3501197, Japan.
[Yabana, K.] Univ Tsukuba, Ctr Computat Sci, Tsukuba, Ibaraki 3058571, Japan.
[Yabana, K.] Univ Tsukuba, Inst Phys, Tsukuba, Ibaraki 3058571, Japan.
RP Bertsch, GF (reprint author), Univ Washington, Inst Nucl Theory, Seattle, WA 98195 USA.
EM bertsch@phys.washington.edu
NR 9
TC 1
Z9 1
U1 1
U2 4
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0010-4655
J9 COMPUT PHYS COMMUN
JI Comput. Phys. Commun.
PD JAN 1
PY 2008
VL 178
IS 1
BP 48
EP 51
DI 10.1016/j.cpc.2007.06.011
PG 4
WC Computer Science, Interdisciplinary Applications; Physics, Mathematical
SC Computer Science; Physics
GA 257IS
UT WOS:000252793000006
ER
PT S
AU Chapline, G
AF Chapline, George
BE Dubois, DM
TI Quantum Mechanics, Pattern Recognition, and the Mammalian Brain
SO COMPUTING ANTICIPATORY SYSTEMS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 8th International Conference on Computing Anticipatory Systems (CASYS
07)
CY AUG 06-11, 2007
CL Liege, BELGIUM
SP FNRS, Univ Liege, HEC Management Sch, Euro Vier Serv SA, Hotel Ville Liege, British Comp Soc, World Org Syst & Cybernet, Syst Sci European Union, Washington Evolutionary Syst Soc
DE Quantum mechanics; pattern recogniton
ID NEURAL-NETWORKS
AB Although the usual way of representing Markov processes is time asymmetric, there is a way of describing Markov processes, due to Schrodinger, which is time symmetric. This observation provides a link between quantum mechanics and the layered Bayesian networks that are often used in automated pattern recognition systems. In particular, there is a striking formal similarity between quantum mechanics and a particular type of Bayesian network, the Helmholtz machine, which provides a plausible model for how the mammalian brain recognizes important environmental situations. One interesting aspect of this relationship is that the "wake-sleep" algorithm for training a Helmholtz machine is very similar to the problem of finding the potential for the multi-channel Schrodinger equation. As a practical application of this insight it may be possible to use inverse scattering techniques to study the relationship between human brain wave patterns, pattern recognition, and learning. We also comment on whether there is a relationship between quantum measurements and consciousness.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Chapline, G (reprint author), Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94550 USA.
NR 10
TC 0
Z9 0
U1 1
U2 3
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0579-0
J9 AIP CONF PROC
PY 2008
VL 1051
BP 15
EP 21
PG 7
WC Computer Science, Artificial Intelligence
SC Computer Science
GA BIQ91
UT WOS:000262094700002
ER
PT J
AU Neilsen, EH
AF Neilsen, Eric H., Jr.
TI The Sloan Digital Sky Survey - Data Archive Server
SO COMPUTING IN SCIENCE & ENGINEERING
LA English
DT Article
AB Sloan Digital Sky Survey's Data Archive Server (DAS) provides public access to data files by the SDSS data reduction pipeline. This article discusses challenges in public of data of this complexity and how the project addressed them.
C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
RP Neilsen, EH (reprint author), Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
EM neilsen@fnal.gov
NR 3
TC 9
Z9 10
U1 0
U2 2
PU IEEE COMPUTER SOC
PI LOS ALAMITOS
PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1314 USA
SN 1521-9615
J9 COMPUT SCI ENG
JI Comput. Sci. Eng.
PD JAN-FEB
PY 2008
VL 10
IS 1
BP 13
EP 17
DI 10.1109/MCSE.2008.16
PG 5
WC Computer Science, Interdisciplinary Applications
SC Computer Science
GA 243NO
UT WOS:000251804800003
ER
PT J
AU Schirmacher, W
Sinn, H
AF Schirmacher, W.
Sinn, H.
TI Collective dynamics of simple liquids: A mode-coupling description
SO CONDENSED MATTER PHYSICS
LA English
DT Article
DE liquid dynamics; collective excitations in liquids; simple liquids;
mode-coupling theory
ID CURRENT-FLUCTUATION SPECTRA; SIMPLE CLASSICAL LIQUIDS; RELAXATION
PROCESSES; SUPERCOOLED LIQUIDS; GLASS-TRANSITION; HARD SPHERES; TRIPLE
POINT; METALS; TRANSPORT; EQUATION
AB We use the mode-coupling theory (MCT), which has been highly successful in accounting for the anomalous relaxation behaviour near the liquid-to-glass transition, for describing the dynamics of simple (i.e. monatomic) liquids away from the glass formation regime. We find that the dynamical structure factor predicted by MCT compares well to experimental findings and results of computer simulations. The memory function exhibits a two-step decay as found frequently in experimental and simulation data. The long-time relaxation regime, in which the relaxation rate strongly depends on the density and is identified as the alpha relaxation. At high density this process leads the glass instability. The short-time relaxation rate is fairly independent of density.
C1 [Schirmacher, W.; Sinn, H.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Schirmacher, W.] Tech Univ Munich, Phys Dept E13, D-85747 Garching, Germany.
[Sinn, H.] DESY, HASYLAB, D-22607 Hamburg, Germany.
RP Schirmacher, W (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
NR 35
TC 7
Z9 7
U1 0
U2 4
PU INST CONDENSED MATTER PHYSICS NATL ACAD SCIENCES UKRAINE
PI LVIV
PA 1 SVIENTSITSKII STR, LVIV, 79011, UKRAINE
SN 1607-324X
J9 CONDENS MATTER PHYS
JI Condens. Matter Phys.
PY 2008
VL 11
IS 1
BP 127
EP 137
PG 11
WC Physics, Condensed Matter
SC Physics
GA 285RO
UT WOS:000254794100012
ER
PT B
AU Henry, SD
Rizy, DT
Baldwin, TL
Kueck, JD
Li, FX
AF Henry, Shawn D.
Rizy, D. Tom
Baldwin, Thomas L.
Kueck, John D.
Li, Fangxing
GP IEEE
TI The Application of Droop-Control in Distributed Energy Resources to
Extend the Voltage Collapse Margin
SO CONFERENCE RECORD 2008 IEEE INDUSTRIAL & COMMERCIAL POWER SYSTEMS
TECHNICAL CONFERENCE
LA English
DT Proceedings Paper
CT IEEE/IAS Industrial and Commercial Power Systems Technical Conference
CY MAY 04-08, 2008
CL Clearwater Beach, FL
SP IEEE, IAS
DE Distributed Energy Resources; Reactive Power Control; Voltage Collapse;
Voltage Stability
ID SYSTEMS; MANAGEMENT
AB The growth in distributed energy resources has the potential to reduce system stresses caused by transmission grid congestion by supplying power and voltage regulation closer to load centers. However, the additional voltage regulation provided by these resources can mask the onset of voltage collapse. Local voltage support flattens the slope in the upper region of the power-voltage nose curve. Coordinating voltage-regulation behavior with the droop-control scheme in distributed resources improves the observation of voltage collapse margins.
Incorporating distributed resource models in the continuation power flow analysis, allows the exploration of the power transfer gains by the application of distributed resources. The analysis provides insight to the impact of droop control on the behavior of the power-voltage curve and voltage collapse. The analysis is applied to a fixed speed induction generator wind farm with separate reactive compensation and the interconnection to the local power system. Results reveal that coordinating the droop control strategy allows the distributed resource to significantly increase the voltage collapse margin without hiding the threat of voltage stability problems.
C1 [Henry, Shawn D.; Baldwin, Thomas L.] Florida State Univ, Ctr Adv Power Syst, Tallahassee, FL 32310 USA.
[Rizy, D. Tom; Kueck, John D.] Oak Ridge Natl Lab, Oak Ridge, TN USA.
[Li, Fangxing] Univ Tennessee, Knoxville, TN USA.
RP Henry, SD (reprint author), Florida State Univ, Ctr Adv Power Syst, Tallahassee, FL 32310 USA.
EM henry@caps.fsu.edu
RI Li, Fangxing/E-6023-2013
OI Li, Fangxing/0000-0003-1060-7618
FU Office of Electricity Delivery & Energy Reliability; U.S. Department of
Energy with UT-Battelle and conducted at Oak Ridge National Laboratory
[DE-AC05-00OR 22725]; Higher Education Research Experiences through the
Oak Ridge Institute for Science and Educations.
FX This work was sponsored by the Office of Electricity Delivery & Energy
Reliability, U.S. Department of Energy under Contract No. DE-AC05-00OR
22725 with UT-Battelle and conducted at Oak Ridge National Laboratory.
This work was also supported by the Higher Education Research
Experiences through the Oak Ridge Institute for Science and Educations.
NR 24
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-2093-3
PY 2008
BP 74
EP +
PG 2
WC Energy & Fuels; Engineering, Electrical & Electronic
SC Energy & Fuels; Engineering
GA BJC12
UT WOS:000264667400013
ER
PT J
AU Carosi, G
van Bibber, K
Pivovaroff, M
AF Carosi, G.
van Bibber, K.
Pivovaroff, M.
TI The search for axions
SO CONTEMPORARY PHYSICS
LA English
DT Review
DE axion; dark matter; microwave cavity; strong CP problem; Peccei-Quinn
solution; ADMX; CAST; RBFT
ID SOLAR AXIONS; INVISIBLE-AXION; MAGNETIC-FIELD; CP INVARIANCE; COSMIC
AXIONS; DARK-MATTER; TELESCOPE; PARTICLES; PHOTON; CONVERSION
AB The axion is a light pseudoscalar particle predicted to exist as a consequence of the Peccei-Quinn solution to the strong-CP problem. Its abundant production in the early Universe along with its stability and insignificant interaction cross-section make it a prime dark matter candidate. This report summarises the search for dark matter axions using resonant microwave cavities as well as searches for axions produced in the Sun and in the laboratory. All of these current experiments focus on the axion-photon interaction, as coherent axion-photon mixing in strong magnetic fields of large spatial extent can make up for the extraordinary weakness of the the coupling of axions to photons.
C1 [Carosi, G.; van Bibber, K.; Pivovaroff, M.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Carosi, G (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
EM carosi2@llnl.gov
RI Pivovaroff, Michael/M-7998-2014
OI Pivovaroff, Michael/0000-0001-6780-6816
FU US Department of Energy [DE-AC52-07NA27344]
FX This work was supported in part by the US Department of Energy under
Contract No. DE-AC52-07NA27344. The support of the Laboratory Directed
Research and Development Program for enabling technology development is
gratefully acknowledged.
NR 56
TC 4
Z9 4
U1 0
U2 3
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0010-7514
J9 CONTEMP PHYS
JI Contemp. Phys.
PY 2008
VL 49
IS 4
BP 281
EP 297
AR PII 905062552
DI 10.1080/00107510802381343
PG 17
WC Physics, Multidisciplinary
SC Physics
GA 368RC
UT WOS:000260639200003
ER
PT J
AU Umansky, MV
Cohen, RH
LoDestro, LL
Xu, XQ
AF Umansky, M. V.
Cohen, R. H.
LoDestro, L. L.
Xu, X. Q.
TI Suite of verification test problems for edge turbulence simulations
SO CONTRIBUTIONS TO PLASMA PHYSICS
LA English
DT Article
DE edge plasma; turbulence simulations
AB We present a suite of test problems that are used for verification of the edge turbulence code BOUT. BOUT is an electromagnetic fluid turbulence code for tokamak edge plasma that performs time integration of reduced Braginskii plasma fluid equations, using spatial discretization in realistic geometry and employing a standard ODE integration package PVODE. Recently the code underwent a substantial redesign and extensive verification testing. In the verification process, a series of linear and nonlinear test problems was applied to BOUT targeting different subgroups of physical terms. The tests include reproducing basic electrostatic and electromagnetic plasma modes in simplified geometry, axisymmetric benchmarks against the 2D edge code UEDGE in the actual DIII-D tokamak divertor geometry. Successful passing of these tests by BOUT gives strong evidence that equations in the code are solved correctly. Although the tests were developed specifically for the BOUT code they can well be applied for verification of other codes used for simulations of edge turbulence. (c) 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
C1 [Umansky, M. V.; Cohen, R. H.; LoDestro, L. L.; Xu, X. Q.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Umansky, MV (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
EM umansky@llnl.gov
NR 3
TC 5
Z9 5
U1 1
U2 3
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 0863-1042
J9 CONTRIB PLASM PHYS
JI Contrib. Plasma Phys.
PY 2008
VL 48
IS 1-3
BP 27
EP 31
DI 10.1002/ctpp.200810004
PG 5
WC Physics, Fluids & Plasmas
SC Physics
GA 290PJ
UT WOS:000255134400003
ER
PT J
AU Ryutov, DD
Cohen, RH
AF Ryutov, D. D.
Cohen, R. H.
TI Geometrical effects in plasma stability and dynamics of coherent
structures in the divertor
SO CONTRIBUTIONS TO PLASMA PHYSICS
LA English
DT Article
DE divertor plasma; plasma stability; coherent plasma structures
ID SCRAPE-OFF-LAYER; TEMPERATURE-GRADIENT INSTABILITY; ALCATOR C-MOD;
CONVECTIVE-TRANSPORT; MAGNETIC-FIELD; BLOB TRANSPORT; ASDEX UPGRADE;
X-POINT; EDGE; TOKAMAK
AB The effects of the strong X-point magnetic shear, of the orientation of the divertor legs with respect to the major axis, and of the tilt of the divertor plates with respect to the poloidal field on plasma dynamics in the divertor region have been studied. The linear stability analysis of flute and resistive ballooning modes is presented for the X-point geometry, with emphasis on the private flux region. The dynamics of isolated plasma filaments ("blobs") passing near the X point is described. In both cases the correct accounting for the geometry turns out to be critically important. (c) 2008 WILEY-VCH Verlag G.bH & Co. KGaA, Weinheim.
C1 [Ryutov, D. D.; Cohen, R. H.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Ryutov, DD (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
EM ryutov1@llnl.gov
NR 32
TC 12
Z9 12
U1 0
U2 2
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 0863-1042
J9 CONTRIB PLASM PHYS
JI Contrib. Plasma Phys.
PY 2008
VL 48
IS 1-3
BP 48
EP 57
DI 10.1002/ctpp.200810008
PG 10
WC Physics, Fluids & Plasmas
SC Physics
GA 290PJ
UT WOS:000255134400007
ER
PT J
AU Pigarov, AY
Krasheninnikov, SI
LaBombard, B
Rognlien, TD
AF Pigarov, A. Yu.
Krasheninnikov, S. I.
LaBombard, B.
Rognlien, T. D.
TI Simulation of parallel SOL flows with UEDGE
SO CONTRIBUTIONS TO PLASMA PHYSICS
LA English
DT Article
DE tokamak; edge plasma; cross-field transport; plasma flow; multi-fluid
modeling; ballooning asymmetry; drifts
ID EDGE PLASMA; TOKAMAK SOL; FLUID CODE; TRANSPORT; DRIVEN
AB Near-sonic parallel plasma flows in the tokamak scrape-off layer (SOL) are modeled with two-dimensional multi-fluid edge plasma transport code UEDGE. As shown, the dominant mechanism driving such flows is fast non-diffusive intermittent cross-field transport (due to blobs) which has strong ballooning-like poloidal asymmetry. The properties of asymmetric-transport-driven flows, recycling, and divertor detachment are studied. The conditions for zonal and circular flow patterns in the SOL are analyzed. The impact of plasma drifts on non-diffusive transport driven flows is modeled and discussed. (c) 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
C1 [Pigarov, A. Yu.; Krasheninnikov, S. I.] Univ Calif San Diego, MAE, La Jolla, CA 92093 USA.
[LaBombard, B.] MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA.
[Rognlien, T. D.] Lawrence Livermore Natl Lab, Livermore, CA USA.
RP Pigarov, AY (reprint author), Univ Calif San Diego, MAE, La Jolla, CA 92093 USA.
EM apigarov@ucsd.edu
NR 14
TC 10
Z9 10
U1 0
U2 4
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 0863-1042
J9 CONTRIB PLASM PHYS
JI Contrib. Plasma Phys.
PY 2008
VL 48
IS 1-3
BP 82
EP 88
DI 10.1002/ctpp.200810014
PG 7
WC Physics, Fluids & Plasmas
SC Physics
GA 290PJ
UT WOS:000255134400013
ER
PT J
AU Fundamenski, W
Coster, DP
Airila, M
Belo, P
Bonnin, X
Chankin, A
Corrigan, G
Erents, SK
Garcia, OE
Glowacz, S
Gulejova, B
Kirschner, A
Naulin, V
Nielsen, A
Kirnev, G
Kotov, V
Konz, C
Rasmussen, JJ
Pitts, RA
Reiter, D
Ribeiro, T
Scott, BD
Strachan, JD
Subba, F
Tsitrone, E
Tskhakaya, D
Wiesen, S
Wischmeier, M
Zagorski, R
AF Fundamenski, W.
Coster, D. P.
Airila, M.
Belo, P.
Bonnin, X.
Chankin, A.
Corrigan, G.
Erents, S. K.
Garcia, O. E.
Glowacz, S.
Gulejova, B.
Kirschner, A.
Naulin, V.
Nielsen, A.
Kirnev, G.
Kotov, V.
Konz, C.
Rasmussen, J. J.
Pitts, R. A.
Reiter, D.
Ribeiro, T.
Scott, B. D.
Strachan, J. D.
Subba, F.
Tsitrone, E.
Tskhakaya, D.
Wiesen, S.
Wischmeier, M.
Zagorski, R.
CA EFDA-JET Contributors
TI Progress in edge plasma transport modeling on JET
SO CONTRIBUTIONS TO PLASMA PHYSICS
LA English
DT Article
DE SOL; divertor; ELM; modelling
ID AVERAGED POWER EXHAUST; SCRAPE-OFF LAYER
AB Recent progress in edge plasma modeling on the JET tokamak is briefly, and somewhat selectively, reviewed. This ongoing modeling activity is aimed at developing a predictive capability for ITER based on numerical models verified and validated upon JET experimental data. Topics include both steady-state and transient particle and power exhaust, the effect of edge/SOL turbulence and edge localized modes, and first wall material migration. (C) 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
C1 [Fundamenski, W.; Corrigan, G.; Erents, S. K.] UKAEA Euratom Fus Assoc, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England.
[Coster, D. P.; Chankin, A.; Konz, C.; Scott, B. D.; Wischmeier, M.] EURATOM, Max Planck Inst Plasmaphys, D-85748 Garching, Germany.
[Airila, M.] Helsinki Univ Technol, Assoc Euratom Tekes, FIN-02015 Helsinki, Finland.
[Belo, P.] Assoc EURATOM IST, Ctr Fuso Nucl, Inst Super Tecn, P-1049001 Lisbon, Portugal.
[Bonnin, X.] Univ Paris 13, CNRS LIMHP, UPR 1311, F-93430 Villetaneuse, France.
[Garcia, O. E.; Naulin, V.; Nielsen, A.; Rasmussen, J. J.] EURATOM, Riso Natl Lab, Opt & Plasma Res Dept, DK-4000 Roskilde, Denmark.
[Kirschner, A.; Kotov, V.; Reiter, D.; Wiesen, S.] EURATOM, Forschungszentrum Julich GmbH, Inst Plasmaphys, D-52425 Julich, Germany.
[Pitts, R. A.] Ecole Polytech Fed Lausanne, Assoc Euratom Confederat Suisse, CRPP, CH-1015 Lausanne, Switzerland.
[Gulejova, B.; Strachan, J. D.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
[Subba, F.] Politecn Torino, Dipartimento Energet, I-10129 Turin, Italy.
[Tsitrone, E.] CEA Cadarache, Assoc EURATOM CEA, DSM DRFC, F-13108 St Paul Les Durance, France.
[Tskhakaya, D.] Univ Innsbruck, Inst Theoret Phys, Assoc Euratom OAW, A-6020 Innsbruck, Austria.
[Glowacz, S.; Zagorski, R.] Assoc Euratom IPPLM Hery, PL-01497 Warsaw, Poland.
[Kirnev, G.] RRC Kurchatov Inst, Moscow 123182, Russia.
RP Fundamenski, W (reprint author), UKAEA Euratom Fus Assoc, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England.
EM Wojtek.fundamenski@jet.uk
RI Airila, Markus/F-6369-2011; Naulin , Volker/A-2419-2012; Rasmussen, Jens
Juul/A-2757-2012; Garcia, Odd Erik/A-4417-2013; Coster,
David/B-4311-2010; Ribeiro, Tiago/J-7404-2013; Nielsen,
Anders/A-3973-2012;
OI Bonnin, Xavier/0000-0002-6743-1062; Naulin , Volker/0000-0001-5452-9215;
Rasmussen, Jens Juul/0000-0002-3543-690X; Garcia, Odd
Erik/0000-0002-2377-8718; Coster, David/0000-0002-2470-9706; Nielsen,
Anders/0000-0003-3642-3905; Belo, Paula/0000-0001-5047-4392
NR 9
TC 1
Z9 1
U1 2
U2 7
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0863-1042
J9 CONTRIB PLASM PHYS
JI Contrib. Plasma Phys.
PY 2008
VL 48
IS 1-3
BP 190
EP 195
DI 10.1002/ctpp.200810034
PG 6
WC Physics, Fluids & Plasmas
SC Physics
GA 290PJ
UT WOS:000255134400033
ER
PT J
AU Cohen, RH
Xu, XQ
AF Cohen, R. H.
Xu, X. Q.
TI Progress in kinetic simulation of edge plasmas
SO CONTRIBUTIONS TO PLASMA PHYSICS
LA English
DT Article
DE edge; plasma; simulation; kinetic; gyrokinetic
ID TEMPERATURE-GRADIENT TURBULENCE; PARTICLE SIMULATION; GYROKINETIC
EQUATIONS; TOKAMAK PLASMA; TRANSPORT; FLOW; LAYER
AB Kinetic codes are required for quantitative simulation of edge plasmas of most tokamaks, because orbit widths can be comparable to radial scale lengths and because mean free paths can be comparable to scale lengths along the magnetic field. However, the edge presents special challenges for edge simulation, both in terms of formulation and implementation. There are two major approaches to kinetic simulation, namely particle-based and continuum- (high-dimensional fluid-) based. The edge presents challenges common to both approaches as well as ones that are unique to each approach. In this paper we review these challenges, and survey how they are being addressed in current edge kinetic simulation projects, as well as the status and accomplishments of those projects. We discuss in some detail the status and recent accomplishments of the U.S. Edge Simulation Laboratory (ESL), a project based on the continuum approach. The ESL currently consists of a main-line effort to develop a code based on high-order conservative finite-volume discretization, as well as two prototype activities, TEMPEST and EGK. These prototype codes are exploring issues attached to energy-magnetic moment and parallel velocity-magnetic moment representations, respectively, as well as physics issues associated with simulation in a steep radial gradient region and a domain that includes both open field lines and closed flux surfaces. (C) 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
C1 [Cohen, R. H.; Xu, X. Q.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Cohen, RH (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
EM rcohen@llnl.gov
NR 39
TC 17
Z9 17
U1 0
U2 0
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 0863-1042
J9 CONTRIB PLASM PHYS
JI Contrib. Plasma Phys.
PY 2008
VL 48
IS 1-3
BP 212
EP 223
DI 10.1002/ctpp.200810038
PG 12
WC Physics, Fluids & Plasmas
SC Physics
GA 290PJ
UT WOS:000255134400037
ER
PT J
AU Hollmann, EM
Parks, PB
Scott, HA
AF Hollmann, E. M.
Parks, P. B.
Scott, H. A.
TI 0-D modeling of fast radiative shutdown of tokamak discharges following
massive gas injection
SO CONTRIBUTIONS TO PLASMA PHYSICS
LA English
DT Article
DE tokamak; disruption; simulation
ID DISRUPTION MITIGATION; PLASMA; CONDUCTIVITY
AB 0-D modeling of fast radiative shutdowns of tokamak discharges following massive gas injection is presented. Realistic neutral deposition rates are used together with a 1-D diffusive model to estimate impurity deposition into the plasma. Non-coronal radiation rates including opacity are used, as are induced wall currents, wall impurity radiation, and neutral and neoclassical corrections to plasma resistivity. The 0-D modeling is found to reproduce the shutdown timescale and free electron density rise seen in DIII-D argon injection experiments well. Opacity, wall currents, and wall impurities can all have a significant (>10%) impact on simulated timescales. (C) 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
C1 [Hollmann, E. M.] Univ Calif San Diego, La Jolla, CA 92093 USA.
[Parks, P. B.] Gen Atom Co, San Diego, CA 92186 USA.
[Scott, H. A.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Hollmann, EM (reprint author), Univ Calif San Diego, La Jolla, CA 92093 USA.
EM ehollmann@ucsd.edu
NR 12
TC 8
Z9 8
U1 0
U2 1
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 0863-1042
J9 CONTRIB PLASM PHYS
JI Contrib. Plasma Phys.
PY 2008
VL 48
IS 1-3
BP 260
EP 264
DI 10.1002/ctpp.200810045
PG 5
WC Physics, Fluids & Plasmas
SC Physics
GA 290PJ
UT WOS:000255134400044
ER
PT J
AU Varentsov, D
Fertman, AD
Turtikov, VI
Ulrich, A
Wieser, J
Fortov, VE
Golubev, AA
Hoffmann, DHH
Hug, A
Kulish, M
Mintsev, V
Ni, PA
Nikolaev, D
Sharkov, BY
Shilkin, N
Ternovoi, VY
Udrea, S
AF Varentsov, D.
Fertman, A. D.
Turtikov, V. I.
Ulrich, A.
Wieser, J.
Fortov, V. E.
Golubev, A. A.
Hoffmann, D. H. H.
Hug, A.
Kulish, M.
Mintsev, V.
Ni, P. A.
Nikolaev, D.
Sharkov, B. Yu
Shilkin, N.
Ternovoi, V. Ya
Udrea, S.
TI Transverse Optical Diagnostics for Intense Focused Heavy Ion Beams
SO CONTRIBUTIONS TO PLASMA PHYSICS
LA English
DT Article
DE Electron and ion optics; beam optics; charged-particle beams; beams in
accelerators; intense particle beams and radiation sources
ID ENERGY-DENSITY PHYSICS; EQUATION-OF-STATE; ELECTRICAL-RESISTIVITY;
CROSS-SECTION; LOSS DYNAMICS; MATTER; EXCITATION; EMISSION; NEON; GSI
AB Beam-induced fluorescence of dense gas targets has been studied for its application to measure the transverse intensity distribution of energetic focused heavy ion beams. Mechanisms of light emission are discussed on the basis of measured wavelength- and time-resolved light emission of argon. Gas pressures from 10 mbar up to 1 bar have been used. Transverse beam intensity profiles of 200 - 400 AMeV U-238 pulses from the heavy ion synchrotron SIS-18 at the Gesellschaft fur Schwerionenforschung, Darmstadt, Germany with up to 5 . 10(9) particles per pulse focused to a sub- millimeter spot have been recorded with argon and helium as target gases. Beam profiles recorded at the ArII lines by an optical filter resulted in the narrowest, most realistic beam diameters.
C1 [Varentsov, D.; Hug, A.] Gesell Schwerionenforsch mbH, D-64291 Darmstadt, Germany.
[Fertman, A. D.; Turtikov, V. I.; Golubev, A. A.; Sharkov, B. Yu] Inst Theoret & Expt Phys, Moscow 117218, Russia.
[Ulrich, A.] Tech Univ Munich, Phys Dept E12, D-85748 Garching, Germany.
[Wieser, J.] Coherent GmbH, D-81379 Munich, Germany.
[Fortov, V. E.; Ni, P. A.; Nikolaev, D.; Shilkin, N.; Ternovoi, V. Ya] Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany.
[Hoffmann, D. H. H.; Udrea, S.] Russian Acad Sci, Inst Problems Chem Phys, Chernogolovka 142432, Russia.
[Ni, P. A.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Varentsov, D (reprint author), Gesell Schwerionenforsch mbH, Planckstr 1, D-64291 Darmstadt, Germany.
EM d.varentsov@gsi.de
RI Hoffmann, Dieter H.H./A-5265-2008; Shilkin, Nikolay/B-1429-2013;
Mintsev, Victor/L-2029-2013
OI Shilkin, Nikolay/0000-0001-9591-7599;
FU GSI-INTAS [03-54-4254, 06-1000012-8707]
FX This work has been supported in part by GSI-INTAS grants 03-54-4254 and
06-1000012-8707.
NR 34
TC 5
Z9 5
U1 1
U2 9
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 0863-1042
J9 CONTRIB PLASM PHYS
JI Contrib. Plasma Phys.
PY 2008
VL 48
IS 8
BP 586
EP 594
DI 10.1002/ctpp.200810092
PG 9
WC Physics, Fluids & Plasmas
SC Physics
GA 369ZL
UT WOS:000260732300006
ER
PT S
AU Mauche, CW
Liedahl, DA
Akiyama, S
Plewa, T
AF Mauche, Christopher W.
Liedahl, Duane A.
Akiyama, Shizuka
Plewa, Tornasz
BE Axelsson, M
TI The Physics of Wind-Fed Accretion
SO COOL DISCS, HOT FLOWS: THE VARYING FACES OF ACCRETING COMPACT OBJECTS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT Conference on Cool Discs, Hot Flows
CY MAR 25-30, 2008
CL Funasdalen, SWEDEN
SP Wenner Gren Fdn, Swedish Res Council, Stockholm Univ
DE hydrodynamics; mass loss and stellar winds; radiative transfer; X-ray
binaries; X-ray spectra
ID X-RAY BINARIES; VELA X-1; STELLAR WIND; EMISSION; SPECTRUM; ECLIPSE;
SYSTEMS; LINES; DISKS; CODE
AB We provide a brief review of the physical processes behind the radiative driving of the winds of OB stars and the Bondi-Hoyle-Lyttleton capture and accretion of a fraction of the stellar wind by a compact object. typically a neutron star, in detached hi.-h-mass X-ray binaries (HMXBs). In addition. we describe a program to develop global models of the radiatively-driven photoionized winds and accretion flows of HMXBs, with particular attention to the prototypical system Vela X-1. The models combine XSTAR photoionization calculations, HULLAC emission models appropriate to X-ray photoionized plasmas, improved models of the radiative driving of photoionized winds, FLASH time-dependent adaptive-mesh hydrodynamics calculations, and Monte Carlo radiation transport. We present two- and three-dimensional maps of the density, temperature, velocity, ionization parameter, and emissivity distributions of representative X-ray emission lines, as well as synthetic global Monte Carlo X-ray spectra. Such models help to better constrain the properties of the winds of HMXBs, which bear on such fundamental questions as the long-term evolution of these binaries and the chemical enrichment of the interstellar medium.(1)
C1 [Mauche, Christopher W.; Liedahl, Duane A.] Lawrence Livermore Natl Lab, L-473,7000 East Ave, Livermore, CA 94550 USA.
[Akiyama, Shizuka] Stanford Univ, KIPAC, Menlo Pk, CA 94025 USA.
[Plewa, Tornasz] Florida State Univ, Dept Comp Sci, Tallahassee, FL 32306 USA.
RP Mauche, CW (reprint author), Lawrence Livermore Natl Lab, L-473,7000 East Ave, Livermore, CA 94550 USA.
RI Plewa, Tomasz/C-1470-2010
OI Plewa, Tomasz/0000-0002-1762-2565
FU U.S. Department of Energy by Lawrence Livermore National Laboratory
[DE-AC52-07NA27344]; Laboratory Directed Research and Development
Program at LLNL [05-ERD-044]; National Aeronautics and Space
Administration [NN07AF9II]; U.S. Department of Energy [B523820]
FX This work was performed under the auspices of the U.S. Department of
Energy by Lawrence Livermore National Laboratory under Contract
DE-AC52-07NA27344. Support for this work was provided by the Laboratory
Directed Research and Development Program at LLNL under project tracking
code 05-ERD-044 and by the National Aeronautics and Space Administration
under Agreement No. NN07AF9II issued through the Astrophysics Theory
Program. T. Plewa's contribution to this work was supported in part by
the U.S. Department of Energy under Grant No. B523820 to the Center for
Astrophysical Thermonuclear Flashes at the University of Chicago. The
FLASH software used in this work was developed in part by the
DOE-supported ASC/AUiance Center for Astrophysical Thermonuclear Flashes
at the University of Chicago.
NR 23
TC 7
Z9 7
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0584-4
J9 AIP CONF PROC
PY 2008
VL 1054
BP 3
EP +
PG 3
WC Astronomy & Astrophysics; Physics, Applied
SC Astronomy & Astrophysics; Physics
GA BIL28
UT WOS:000260484300001
ER
PT J
AU Ueno, S
Ohji, T
Lin, HT
AF Ueno, Shunkichi
Ohji, Tatsuki
Lin, Hua-Tay
TI Recession behavior of Yb2Si2O7 phase under high speed steam jet at high
temperatures
SO CORROSION SCIENCE
LA English
DT Article
DE ceramics; SEM; XRD; atmospheric corrosion
ID SILICON-NITRIDE; WATER-VAPOR; GAS-TURBINE; COMPONENTS; OXIDATION;
CORROSION; CERAMICS; EXPOSURE
AB Recession behavior of Yb2Si2O7 phase was examined under high speed steam jet environment between 1300 degrees C and 1500 degrees C. Yb2SiO5 phase was formed on the bulk surface by the decomposition of Yb2Si2O7 phase and the elimination of silica component at elevated temperatures. The phase ratio of Yb2SiO5/Yb2Si2O7 increased up to 1400 degrees C and then decreased above 1400 degrees C. The relative intensity of 220 peak for Yb2Si2O7 phase increased with increasing the temperatures. Fine grains were generated on the bulk surface at 1300 degrees C. The phase decomposition caused on the grain interior. A porous structure was formed on the bulk surface during the test at 1400 degrees C. Surface cracks were generated for 1400 degrees C test sample. A smooth surface was generated on the surface of 1500 degrees C test sample. The triple points of the grains were bridged with a glassy phase. (c) 2007 Published by Elsevier Ltd.
C1 [Ueno, Shunkichi] Osaka Univ, Inst Sci & Ind Res, Osaka 5670047, Japan.
[Ohji, Tatsuki] Natl Inst Adv Sci & Technol, Adv Mfg Res Inst, Moriyama Ku, Nagoya, Aichi, Japan.
[Lin, Hua-Tay] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Ueno, S (reprint author), Osaka Univ, Inst Sci & Ind Res, 8-1 Mihogaoka, Osaka 5670047, Japan.
EM ueno23@sanken.osaka-u.ac.jp
NR 14
TC 17
Z9 19
U1 6
U2 31
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0010-938X
J9 CORROS SCI
JI Corrosion Sci.
PD JAN
PY 2008
VL 50
IS 1
BP 178
EP 182
DI 10.1016/j.corsci.2007.06.014
PG 5
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 261PS
UT WOS:000253093100020
ER
PT S
AU Boyer, W
McQueen, M
AF Boyer, Wayne
McQueen, Miles
BE Lopez, J
Hammerli, BM
TI Ideal Based Cyber Security Technical Metrics for Control Systems
SO CRITICAL INFORMATION INFRASTRUCTURES SECURITY
SE Lecture Notes in Computer Science
LA English
DT Proceedings Paper
CT 2nd International Workshop on Critical Information Infrastructures
Security
CY OCT 03-05, 2007
CL Univ Malaga, Comp Sci Dept, Malaga, SPAIN
HO Univ Malaga, Comp Sci Dept
DE Cyber Security Metrics; Control System Security
AB Much of the world's critical infrastructure is at risk from attack through electronic networks connected to control systems. Security metrics are important because they provide the basis for management decisions that affect the protection of the infrastructure. A cyber security technical metric is the security relevant output from an explicit mathematical model that makes use of objective measurements of a technical object. A specific set of technical security metrics are proposed for use by the operators of control systems. Our proposed metrics are based on seven security ideals associated with seven corresponding abstract dimensions of security. We have defined at least one metric for each of the seven ideals. Each metric is a measure of how nearly the associated ideal has been achieved. These seven ideals provide a useful structure for further metrics development. A case study shows how the proposed metrics can be applied to an operational control system.
C1 [Boyer, Wayne; McQueen, Miles] Idaho Natl Lab, Idaho Falls, ID 83404 USA.
RP Boyer, W (reprint author), Idaho Natl Lab, 2525 Fremont Ave, Idaho Falls, ID 83404 USA.
EM wayne.boyer@inl.gov; miles.mcqueen@inl.gov
NR 17
TC 7
Z9 7
U1 0
U2 1
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0302-9743
BN 978-3-540-89095-9
J9 LECT NOTES COMPUT SC
PY 2008
VL 5141
BP 246
EP 260
PG 15
WC Computer Science, Hardware & Architecture; Computer Science, Information
Systems; Computer Science, Theory & Methods
SC Computer Science
GA BIR19
UT WOS:000262126100021
ER
PT S
AU Cassidy, RF
Chavez, A
Trent, J
Urrea, J
AF Cassidy, Regis Friend
Chavez, Adrian
Trent, Jason
Urrea, Jorge
BE Goetz, E
Shenoi, S
TI Remote forensic analysis of process control systems
SO CRITICAL INFRASTRUCTURE PROTE CTION
SE International Federation for Information Processing
LA English
DT Proceedings Paper
CT 1st Annual IFIP International Conference on Critical Infrastructure
Protection
CY MAR 19-21, 2007
CL Dartmouth Coll, Hanover, NH
SP IFIP WG 11 10
HO Dartmouth Coll
DE process control systems; digital forensics; live forensics; EnCase
AB Forensic analysis can help maintain the security of process control systems: identifying the root cause of a system compromise or failure is useful for mitigating current and future threats. However, forensic analysis of control systems is complicated by three factors. First, live analysis must riot impact the performance and functionality of a control system. Second, the analysis should be performed remotely as control systems are typically positioned in widely dispersed locations. Third, forensic techniques and tools must accommodate proprietary or specialized control system hardware, software, applications and protocols.
This paper explores the use of a popular digital forensic tool, EnCase Enterprise, for conducting remote forensic examinations of process control systems. Test results in a laboratory-scale environment demonstrate the feasibility of conducting remote forensic analyses on live control systems.
C1 [Cassidy, Regis Friend] Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
RP Cassidy, RF (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
NR 4
TC 4
Z9 4
U1 0
U2 0
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013, UNITED STATES
SN 1571-5736
BN 978-0-387-75461-1
J9 INT FED INFO PROC
PY 2008
VL 253
BP 223
EP +
PG 2
WC Computer Science, Interdisciplinary Applications; Computer Science,
Theory & Methods
SC Computer Science
GA BHC63
UT WOS:000252198100016
ER
PT J
AU Conaghan, P
Casler, MD
O'Kiely, P
Dowley, LJ
AF Conaghan, Patrick
Casler, Michael D.
O'Kiely, Padraig
Dowley, Leslie J.
TI Efficiency of indirect selection for dry matter yield based on fresh
matter yield in perennial ryegrass sward plots
SO CROP SCIENCE
LA English
DT Article
ID COCKSFOOT DACTYLIS-GLOMERATA; FESCUE FESTUCA-PRATENSIS; LOLIUM-PERENNE;
CULTIVAR TRIALS; VARIABILITY; DIGESTIBILITY; AGRICULTURE; INHERITANCE;
VARIETIES; DESIGN
AB Forage dry matter yield (DMY) is a high-priority trait in breeding perennial ryegrass (Lolium perenne L.). However, determining dry matter concentration is highly labor intensive. For a similar level of resources, indirect selection based on fresh matter yield (FMY) would allow a greater number of replicates, genotypes, or both to be evaluated. Our objective was to estimate the efficiency of indirect selection for DMY based on FMY of pure perennial ryegrass sward plots. Over a 14-yr period, replicated trials, containing perennial ryegrass genotypes of similar ploidy and maturity category, were sown in Ireland and assessed for DMY and FMY at each harvest over two consecutive years. Forage was generally surface dry when harvested. The estimated efficiency of indirect selection based on two replicates and comparable selection intensity was high ( >= 0.80). Simulation models indicated that resources would be used more efficiently by evaluating more genotypes than by increasing the number of replicates. For example, doubling the number of plots to increase the number of replicates from two to four indicated an increase in the efficiency of indirect selection from a mean 0.88 to 0.94. However, doubling the number of plots and including more genotypes, facilitating greater selection intensity, indicated an increase in the efficiency of indirect selection from a mean 0.88 to 1.04. This study indicates that FMY can be used successfully as an indirect selection method of increasing DMY in perennial ryegrass swards.
C1 [Conaghan, Patrick; Dowley, Leslie J.] TEAGASC, Carlow, Ireland.
[Casler, Michael D.] USDA ARS, US Dairy Forage Res Ctr, Madison, WI 53706 USA.
[O'Kiely, Padraig] TEAGASC, Grange Beef Res Ctr, Dunsany, Meath, Ireland.
RP Conaghan, P (reprint author), TEAGASC, Oak Pk Res Ctr, Carlow, Ireland.
EM patrick.conaghan@teagasc.ie
NR 25
TC 6
Z9 6
U1 0
U2 3
PU CROP SCIENCE SOC AMER
PI MADISON
PA 677 S SEGOE ROAD, MADISON, WI 53711 USA
SN 0011-183X
J9 CROP SCI
JI Crop Sci.
PD JAN-FEB
PY 2008
VL 48
IS 1
BP 127
EP 133
DI 10.2135/cropsci2007.05.0274
PG 7
WC Agronomy
SC Agriculture
GA 259WK
UT WOS:000252971400015
ER
PT S
AU Ackenriann, MR
McGraw, JT
Zimmer, PC
AF Ackenriann, Mark R.
McGraw, John T.
Zimmer, Peter C.
BE Mouroulis, PZ
Smith, WJ
Jonhson, RB
TI Five lens corrector for Cassegrain-form telescopes.
SO CURRENT DEVELOPMENTS IN LENS DESIGN AND OPTICAL ENGINEERING IX
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Current Developments in Lens Design and Optical
Engineering IX
CY AUG 11-12, 2008
CL San Diego, CA
SP SPIE
DE Survey telescope; wide-field corrector; Cassegrain; Ritchey-Chretien
AB Refractive elements are commonly used on Cassegrain-form telescopes to correct off-axis aberrations and both widen and flatten the field. Early correctors used two lenses with spherical surfaces, but their performance was somewhat limited. More recent correctors have three or four lenses with some including at least one aspheric surface. These systems produce high resolution images over relatively wide fields but often require the corrector and mirrors to be optimized together. Here we present a new corrector design using five spherical lenses. This approach produces high image quality with low distortion over wide fields and has sufficient degrees of freedom to allow corrector to be optimized independent of the mirrors if necessary.
C1 [Ackenriann, Mark R.] Sandia Natl Labs, Livermore, CA 94550 USA.
RP Ackenriann, MR (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA.
NR 17
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 978-0-8194-7280-9
J9 PROC SPIE
PY 2008
VL 7060
AR 70600D
DI 10.1117/12.792089
PG 13
WC Optics
SC Optics
GA BIQ84
UT WOS:000262081400009
ER
PT S
AU Love, AH
AF Love, Adam H.
BE Hudnell, HK
TI Chapter 18: Determining important parameters related to cyanobacterial
alkaloid toxin exposure
SO CYANOBACTERIAL HARMFUL ALGAL BLOOMS: STATE OF THE SCIENCE AND RESEARCH
NEEDS
SE ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY
LA English
DT Article; Proceedings Paper
CT International Symposium on Cyanobacterial Algal Blooms - State of the
Science and Research Needs
CY SEP 06-10, 2005
CL Research Triangle Park, NC
ID ANATOXIN-A; STABILITY; WATER
C1 Lawrence Livermore Natl Lab, Forens Sci Ctr, Livermore, CA 94550 USA.
RP Love, AH (reprint author), Lawrence Livermore Natl Lab, Forens Sci Ctr, POB 508,L-178, Livermore, CA 94550 USA.
NR 8
TC 0
Z9 0
U1 0
U2 2
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0065-2598
BN 978-0-387-75864-0
J9 ADV EXP MED BIOL
JI Adv.Exp.Med.Biol.
PY 2008
VL 619
BP 453
EP 463
PG 11
WC Biology; Medicine, Research & Experimental
SC Life Sciences & Biomedicine - Other Topics; Research & Experimental
Medicine
GA BHO77
UT WOS:000254893200037
PM 18461778
ER
PT J
AU Miras, HN
Long, DL
Kogerler, P
Cronin, L
AF Miras, Haralampos N.
Long, De-Liang
Kogerler, Paul
Cronin, Leroy
TI Bridging the gap between solution and solid state studies in
polyoxometalate chemistry: Discovery of a family of [V1M17]-based cages
encapsulating two {(VO4)-O-V} moieties
SO DALTON TRANSACTIONS
LA English
DT Article
ID DOT-S INTERACTIONS; BUILDING-BLOCKS; SUBSTITUTED HETEROPOLYANIONS;
DAWSON ANIONS; ONE-ELECTRON; CLUSTERS; OXIDATION; REDUCTION; SYMMETRY;
ISOMER
AB A family of polyoxometalates with the composition [H2V3M17O62](6-) features a Dawson-like architecture containing two tetrahedral {(VO4)-O-V} templates rather than main group hetero-anions ({PO4} or {SO4} etc.) typically associated with classical heteropolyacids, situated within a mixed-metal {(M17VO54)-V-VI-O-IV} cage and these clusters were first discovered using mass spectrometry.
C1 [Miras, Haralampos N.; Long, De-Liang; Cronin, Leroy] Univ Glasgow, Dept Chem, Glasgow G12 8QQ, Lanark, Scotland.
[Kogerler, Paul] Iowa State Univ, Dept Phys & Astron, Ames Lab, Ames, IA 50011 USA.
RP Cronin, L (reprint author), Univ Glasgow, Dept Chem, Univ Ave, Glasgow G12 8QQ, Lanark, Scotland.
EM lee@chem.gla.ac.uk
RI Cronin, Leroy/B-7752-2008; Miras, Haralampos/C-1691-2008; Long,
Deliang/C-3500-2011; Miras, Haralampos/C-6345-2014; Kogerler,
Paul/H-5866-2013
OI Cronin, Leroy/0000-0001-8035-5757; Miras,
Haralampos/0000-0002-0086-5173; Miras, Haralampos/0000-0002-0086-5173;
Kogerler, Paul/0000-0001-7831-3953
NR 60
TC 36
Z9 36
U1 2
U2 11
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1477-9226
J9 DALTON T
JI Dalton Trans.
PY 2008
IS 2
BP 214
EP 221
DI 10.1039/b714285d
PG 8
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 243BS
UT WOS:000251770500006
PM 18097488
ER
PT J
AU Christensen, AN
Jensen, TR
Lebech, B
Hanson, JC
Jakobsen, HJ
Skibsted, J
AF Christensen, Axel Norlund
Jensen, Torben R.
Lebech, Bente
Hanson, Jonathan C.
Jakobsen, Hans J.
Skibsted, Jorgen
TI Thermal decomposition of monocalcium aluminate decahydrate (CaAl2O4
center dot 10H(2)O) investigated by in-situ synchrotron X-ray powder
diffraction, thermal analysis and Al-27, H-2 MAS NMR spectroscopy
SO DALTON TRANSACTIONS
LA English
DT Article
ID CRYSTAL-STRUCTURE; CALCIUM; CEMENT; OXIDE
AB The stability of monocalcium aluminate decahydrate, with the nominal composition CaAl2O4 center dot 10H(2)O (CAH(10)), has a decisive role for the strength development and durability of cementitious materials based on high alumina cements. This has prompted an investigation of the thermal transformation of crystalline monocalcium aluminate decahydrate in air to an amorphous phase by in-situ synchrotron X-ray powder diffraction in the temperature range from 25 to 500 degrees C, by DTA/TGA, and H-2, Al-27 MAS NMR spectroscopy. The decomposition includes the loss of hydrogen-bonded water molecules in the temperature range up to 175 degrees C, coupled with a reduction of the unit cell volume from 1928 angstrom(3) at 25 degrees C, to 1674 angstrom(3) at 185 degrees C. Furthermore, X-ray diffraction shows that CaAl2O4 center dot 10H(2)O starts to transform to an amorphous phase at similar to 65 degrees C. This phase is fully developed at similar to 175 degrees C and it converts to crystalline CaAl2O4 when heated to 1300 degrees C. The thermal decomposition in the temperature range from similar to 65 to similar to 175 degrees C involves both formation of an amorphous phase including AlO4 tetrahedra and structural changes in the remaining crystalline phase.
C1 [Jensen, Torben R.] Univ Aarhus, Dept Chem, iNANO, Interdisciplinary Nanosci Ctr, DK-8000 Aarhus C, Denmark.
[Christensen, Axel Norlund] Crystal Chem, DK-8210 Aarhus, Denmark.
[Lebech, Bente] Univ Copenhagen, Niels Bohr Inst, DK-2100 Copenhagen, Denmark.
[Hanson, Jonathan C.] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
[Jakobsen, Hans J.; Skibsted, Jorgen] Univ Aarhus, Dept Chem, iNANO, Instrument Ctr Solid State NMR Spect, DK-8000 Aarhus C, Denmark.
RP Jensen, TR (reprint author), Univ Aarhus, Dept Chem, iNANO, Interdisciplinary Nanosci Ctr, Langelandsgade 140, DK-8000 Aarhus C, Denmark.
EM trj@chem.au.dk
RI Hanson, jonathan/E-3517-2010; Lebech, Bente/A-9629-2016
OI Lebech, Bente/0000-0002-6403-4141
NR 17
TC 2
Z9 2
U1 0
U2 15
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1477-9226
J9 DALTON T
JI Dalton Trans.
PY 2008
IS 4
BP 455
EP 462
DI 10.1039/b712684k
PG 8
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 249UC
UT WOS:000252254300007
PM 18185861
ER
PT J
AU Chandrasekhar, V
Azhakar, R
Senapati, T
Thilagar, P
Ghosh, S
Verma, S
Boomishankar, R
Steiner, A
Kogerler, PK
AF Chandrasekhar, Vadapalli
Azhakar, Ramachandran
Senapati, Tapas
Thilagar, Pakkirisamy
Ghosh, Surajit
Verma, Sandeep
Boomishankar, Ramamoorthy
Steiner, Alexander
Kogerler, Paul K.
TI Synthesis, structure, magnetism and nuclease activity of tetranuclear
copper(II) phosphonates containing ancillary 2,2 '-bipyridine or
1,10-phenanthroline ligands
SO DALTON TRANSACTIONS
LA English
DT Article
ID METAL PHOSPHONATE; PYRAZOLE LIGANDS; ASYMMETRIC HYDROGENATION;
ADSORPTION PROPERTIES; COORDINATION POLYMER; CADMIUM PHOSPHONATE;
CRYSTAL-STRUCTURE; AROMATIC KETONES; CU(II) COMPLEXES; VISIBLE-LIGHT
AB The reaction of cyclohexylphosphonic acid (C6H11PO3H2), anhydrous CuCl2 and 2,2'-bipyridine (bpy) in the presence of triethylamine followed by a metathesis reaction with KNO3 afforded [Cu-4(mu-Cl)(2)(mu(3)-C6H11PO3)(2)(bpy)(4)](NO3)(2) (1). In an analogous reaction involving Cu(OAc)(2)center dot H2O, the complex [Cu-4(mu-CH3COO)(2)(mu(3)-C6H11PO3)(2)(2,2'-bpy)(4)](CH3COO)(2) (2) has been isolated. The three-component reaction involving Cu(NO3)(2)center dot 3H(2)O, cyclohexylphosphonic acid and 2,2'-bipyridine in the presence of triethylamine afforded the tetranuclear assembly [Cu-4(mu-OH)(mu(3)-C6H11PO3)(2)(2,2'-bpy)(4) (H2O)(2)](NO3)(3) (3). Replacing 2,2'-bipyridine with 1,10-phenanthroline (phen) in the above reaction resulted in [Cu-4(mu-OH)(mu(3)-C6H11PO3)(2)(phen)(4)(H2O)(2)](NO3)(3) (4). In all the copper(II) phosphonates (1-4) the two phosphonate ions bridge the four copper( II) ions in a capping coordination action. Each phosphonate ion bridges four copper(II) ions in a mu(4), eta(3) coordination mode or 4.211 of the Harris notation. Variable-temperature magnetic studies on 1-4 reveal that all four complexes exhibit moderately strong intramolecular antiferromagnetic coupling. The DNA cleavage activity of complexes 1-4 is also described. Compounds 1 and 3 were able to completely convert the supercoiled pBR322 DNA form I to nick form II without any co-oxidant. In contrast, 50% conversion occurred with 2 and 40% with 4. In the presence of magnesium monoperoxyphthalate all four compounds achieved rapid conversion of form I to form II.
C1 [Azhakar, Ramachandran; Senapati, Tapas; Thilagar, Pakkirisamy; Ghosh, Surajit; Verma, Sandeep] Indian Inst Technol, Dept Chem, Kanpur 208016, Uttar Pradesh, India.
[Boomishankar, Ramamoorthy; Steiner, Alexander] Univ Liverpool, Dept Chem, Liverpool L69 7ZD, Merseyside, England.
[Kogerler, Paul K.] Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA.
[Kogerler, Paul K.] Iowa State Univ Sci & Technol, Dept Phys & Astron, Ames, IA 50011 USA.
RP Chandrasekhar, V (reprint author), Indian Inst Technol, Dept Chem, Kanpur 208016, Uttar Pradesh, India.
EM vc@iitk.ac.in
RI Kogerler, Paul/H-5866-2013
OI Kogerler, Paul/0000-0001-7831-3953
NR 68
TC 53
Z9 53
U1 2
U2 13
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1477-9226
J9 DALTON T
JI Dalton Trans.
PY 2008
IS 9
BP 1150
EP 1160
DI 10.1039/b712876b
PG 11
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 267EJ
UT WOS:000253492000007
PM 18283376
ER
PT J
AU Lu, ZL
Costa, JS
Roubeau, O
Mutikainen, I
Turpeinen, U
Teat, SJ
Gamez, P
Reedijk, J
AF Lu, Zhengliang
Costa, Jose Sanchez
Roubeau, Olivier
Mutikainen, Ilpo
Turpeinen, Urho
Teat, Simon J.
Gamez, Patrick
Reedijk, Jan
TI A copper complex bearing a TEMPO moiety as catalyst for the aerobic
oxidation of primary alcohols
SO DALTON TRANSACTIONS
LA English
DT Article
ID FLUOROUS BIPHASIC CATALYSIS; SELECTIVE OXIDATION; MILD CONDITIONS;
STOICHIOMETRIC OXIDANT; CARBONYL-COMPOUNDS; CRYSTAL-STRUCTURES;
ORGANIC-CHEMICALS; NITROXYL RADICALS; PI INTERACTIONS; DONOR LIGANDS
AB A new bifunctional, triazine-based ligand has been designed with the aim to generate a copper(II) complex holding a TEMPO (2,2,6,6-tetramethylpiperidinyloxy) moiety. The coordination compound obtained from the ligand 4-(2-(3-(pyridin-2-yl)-1H-pyrazol-1-yl)ethoxy)-6-(4-amino- 2,2,6,6-tetramethylpiperidine-1-oxyl)-N,N-diphenyl-1,3,5-triazin-2-amine (pypzt-1) and copper(II) bromide (i.e. complex 8) is capable of catalysing the selective, aerobic oxidation of benzyl alcohol to 84% of benzaldehyde in 24 h. This "galactose oxidase activity" of the copper/TEMPO complex is observed as well for the conversion of the non-activated alkyl alcohol octan-1-ol to octanal with a yield of 29% after the same reaction time. The single-crystal X-ray structure of 8 shows that its crystal lattice contains [(CuBr2)-Br-1](-) anions which appear to be stabilised by means of both anion-pi and hydrogen bonding interactions. In addition, the solid state structure of 8 exhibits (lone-pair)-pi interactions between the nitrogen atom of an acetonitrile molecule and a triazine ring. The magnetic properties of 8 have been investigated by EPR and magnetic susceptibility measurements.
C1 [Lu, Zhengliang; Costa, Jose Sanchez; Gamez, Patrick; Reedijk, Jan] Leiden Univ, Leiden Inst Chem, NL-2300 RA Leiden, Netherlands.
[Roubeau, Olivier] Univ Bordeaux 1, Ctr Rech Paul Pascal, CNRS, F-33600 Pessac, France.
[Mutikainen, Ilpo; Turpeinen, Urho] Univ Helsinki, Dept Chem, Inorgan Chem Lab, FIN-00014 Helsinki, Finland.
[Teat, Simon J.] ALS, Berkeley Lab, Berkeley, CA 94720 USA.
RP Gamez, P (reprint author), Leiden Univ, Leiden Inst Chem, POB 9502, NL-2300 RA Leiden, Netherlands.
EM reedijk@chem.leidenuniv.nl
RI Roubeau, Olivier/A-6839-2010; Reedijk, Jan/F-1992-2010; Gamez,
Patrick/B-3610-2012; Sanchez Costa, Jose/N-9085-2014
OI Roubeau, Olivier/0000-0003-2095-5843; Reedijk, Jan/0000-0002-6739-8514;
Gamez, Patrick/0000-0003-2602-9525; Sanchez Costa,
Jose/0000-0001-5426-7956
FU NIOK; HRSMC; PTN
FX The investigations described in this paper were supported by the
Graduate Research School Combination "NRSC Catalysis", a joint activity
of the graduate research schools NIOK, HRSMC and PTN. The COST program
Action D35/0011 is also kindly acknowledged.
NR 45
TC 33
Z9 35
U1 2
U2 27
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1477-9226
J9 DALTON T
JI Dalton Trans.
PY 2008
IS 27
BP 3567
EP 3573
DI 10.1039/b802109k
PG 7
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 321CB
UT WOS:000257280800009
PM 18594705
ER
PT J
AU Yang, PD
AF Yang, Peidong
TI Chemistry and physics of silicon nanowire
SO DALTON TRANSACTIONS
LA English
DT Article; Proceedings Paper
CT 11th Dalton Discussion Meeting
CY JUN 23-25, 2008
CL Univ Calf Berkeley, Berkeley, CA
HO Univ Calf Berkeley
ID SI/SIGE SUPERLATTICE NANOWIRES; ELECTRICAL CHARACTERISTICS;
THERMAL-CONDUCTIVITY; BUILDING-BLOCKS; GROWTH; INTEGRATION; CELLS
AB This article provides a short overview of the current status of the silicon nanowire research including its synthetic chemistry and physical property characterization, with examples drawn mainly from the author's lab.
C1 [Yang, Peidong] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
[Yang, Peidong] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Yang, PD (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
NR 22
TC 16
Z9 16
U1 0
U2 19
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1477-9226
J9 DALTON T
JI Dalton Trans.
PY 2008
IS 33
BP 4387
EP 4391
DI 10.1039/b801440j
PG 5
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 337DG
UT WOS:000258415100006
PM 18698439
ER
PT J
AU Kurlancheek, W
Jung, YS
Head-Gordon, M
AF Kurlancheek, Westin
Jung, Yousung
Head-Gordon, Martin
TI Effects of ligands and spin-polarization on the preferred conformation
of distannynes
SO DALTON TRANSACTIONS
LA English
DT Article; Proceedings Paper
CT 11th Dalton Discussion Meeting
CY JUN 23-25, 2008
CL Univ Calf Berkeley, Berkeley, CA
HO Univ Calf Berkeley
ID ELEMENT ALKYNE ANALOGS; ELECTRONIC-STRUCTURE; DIRADICAL CHARACTER;
TRIPLE BONDS; LEAD ANALOGS; BASIS-SETS; REACTIVITY; ORBITALS; TIN;
STABILITY
AB Recent experimental and theoretical evidence has shown that distannynes, RSnSnR, can adopt either a singly bonded or a multiply bonded structure. Within calculations on small models, such asMeSnSnMe, apparently dramatic differences in conformational preference have been reported. We show that these differences arise due to the treatment of spin-polarization in density functional theory (DFT), and review stability analysis; a diagnostic for the need to include spin-polarization. The low-energy singly bonded structure can only be reached when spin-polarization is allowed. Additional DFT calculations on PhSnSnPh show that the singly bonded structure is the global minimum, leading to a. at torsional potential. The role of electronic effects is further probed by changing the donor - acceptor properties of R. Implications for the structural preference of experimentally synthesized species are discussed.
C1 [Kurlancheek, Westin; Head-Gordon, Martin] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
[Kurlancheek, Westin; Head-Gordon, Martin] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA.
[Jung, Yousung] CALTECH, Arthur Amos Noyes Lab Chem Phys, Pasadena, CA 91125 USA.
RP Kurlancheek, W (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
RI Jung, Yousung/D-1676-2010
OI Jung, Yousung/0000-0003-2615-8394
NR 41
TC 0
Z9 0
U1 0
U2 3
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1477-9226
J9 DALTON T
JI Dalton Trans.
PY 2008
IS 33
BP 4428
EP 4435
DI 10.1039/b803417f
PG 8
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 337DG
UT WOS:000258415100012
PM 18698445
ER
PT J
AU Parvanov, VM
Schenter, GK
Hess, NJ
Daemen, LL
Hartl, M
Stowe, AC
Camaioni, DM
Autrey, T
AF Parvanov, Vencislav M.
Schenter, Gregory K.
Hess, Nancy J.
Daemen, Luke L.
Hartl, Monika
Stowe, Ashley C.
Camaioni, Donald M.
Autrey, Tom
TI Materials for hydrogen storage: structure and dynamics of borane ammonia
complex
SO DALTON TRANSACTIONS
LA English
DT Article; Proceedings Paper
CT 11th Dalton Discussion Meeting
CY JUN 23-25, 2008
CL Univ Calf Berkeley, Berkeley, CA
HO Univ Calf Berkeley
ID MOLECULAR-ORBITAL METHODS; THERMAL-DECOMPOSITION; DIHYDROGEN BOND; AMINE
BORANES; SOLID BH3NH3; BASIS SETS; NMR; BORON; THERMOCHEMISTRY;
DIFFRACTION
AB The activation energies for rotations in low- temperature orthorhombic ammonia borane were analyzed and characterized in terms of electronic structure theory. The perdeuterated (11)B-enriched ammonia borane, (11)BD(3)ND(3), sample was synthesized, and the structure was refined from neutron powder diffraction data at 175 K. This temperature has been chosen as median of the range of previously reported nuclear magnetic resonance spectroscopy measurements of these rotations. A representative molecular cluster model was assembled from the refined geometry, and the activation energies were calculated and characterized by analysis of the environmental factors that control the rotational dynamics. The barrier for independent NH(3) rotation, E(a) = 12.7 kJ mol(-1), largely depends on the molecular conformational torsion in the solid- state geometry. The barrier for independent BH(3) rotation, E(a) = 38.3 kJ mol(-1), results from the summation of the effect of molecular torsion and large repulsive intermolecular hydrogen - hydrogen interactions. However, a barrier of E(a) = 31.1 kJ mol(-1) was calculated for internally correlated rotation with preserved molecular conformation. Analysis of the barrier heights and the corresponding rotational pathways shows that rotation of the BH(3) group involves strongly correlated rotation of the NH(3) end of the molecule. This observation suggests that the barrier from previously reported measurement of BH(3) rotation corresponds to H(3)B - NH(3) correlated rotation.
C1 [Parvanov, Vencislav M.; Schenter, Gregory K.; Hess, Nancy J.; Stowe, Ashley C.; Camaioni, Donald M.; Autrey, Tom] Pacific NW Natl Lab, Fundamental & Computat Sci Directorate, Richland, WA 99352 USA.
[Daemen, Luke L.; Hartl, Monika] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Autrey, T (reprint author), Pacific NW Natl Lab, Fundamental & Computat Sci Directorate, Richland, WA 99352 USA.
EM tom.autrey@pnl.gov
RI Lujan Center, LANL/G-4896-2012; Hartl, Monika/F-3094-2014; Schenter,
Gregory/I-7655-2014; Hartl, Monika/N-4586-2016;
OI Hartl, Monika/0000-0002-6601-7273; Schenter,
Gregory/0000-0001-5444-5484; Hartl, Monika/0000-0002-6601-7273; Hess,
Nancy/0000-0002-8930-9500
NR 47
TC 33
Z9 34
U1 0
U2 12
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1477-9226
J9 DALTON T
JI Dalton Trans.
PY 2008
IS 33
BP 4514
EP 4522
DI 10.1039/b718138h
PG 9
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 337DG
UT WOS:000258415100023
PM 18698456
ER
PT S
AU Turcu, G
Nestorov, S
Foster, I
AF Turcu, Gabriela
Nestorov, Svetlozar
Foster, Ian
BE Song, IY
Eder, J
Nguyen, TM
TI Efficient incremental maintenance of derived relations and BLAST
computations in bioinformatics data warehouses
SO DATA WAREHOUSING AND KNOWLEDGE DISCOVERY, PROCEEDINGS
SE Lecture Notes in Computer Science
LA English
DT Proceedings Paper
CT 10th International Conference on Data Warehousing and Knowledge
Discovery
CY SEP 02-05, 2008
CL Turin, ITALY
ID EXPRESSIONS
AB In the data driven field of bioinformatics, data warehouses have emerged as common solutions to facilitate data analysis. The uncertainty, complexity and change rate of biological data underscore the importance of capturing its evolution, To capture information about our database's evolution, we incorporate a temporal dimension in our data model, which we implement by means of lifespan timestamps attached to every tuple in the warehouse. This temporal information allows us to keep a full history of the warehouse and recreate any past version for purposes of auditing. Equally importantly, this information facilitates the incremental maintenance of the warehouse. We maintain the warehouse incrementally not only for relations derived by applying the standard relational operators but also for computed relations. In particular, we consider computed relations obtained through external BLAST sequence alignment computations, which are often identified as a bottleneck in the integrated warehouse maintenance process. Our experiments with subsets of protein sequences from the NCBI non-redundant database demonstrate at least 10-fold speedups for realistic target space size increases of 1% to 5%.
C1 [Turcu, Gabriela; Foster, Ian] Univ Chicago, Dept Comp Sci, Chicago, IL 60637 USA.
[Nestorov, Svetlozar; Foster, Ian] Univ Chicago, Comp Inst, Argonne Natl Lab, Chicago, IL 60637 USA.
[Nestorov, Svetlozar; Foster, Ian] Math & Comp Sci Div, Agronne Natl Lab, Lemont, IL USA.
RP Turcu, G (reprint author), Univ Chicago, Dept Comp Sci, Chicago, IL 60637 USA.
EM gabri@cs.uchicago.edu; foster@mcs.anl.gov; evtimov@cs.uchicago.edu
NR 21
TC 2
Z9 2
U1 0
U2 0
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0302-9743
BN 978-3-540-85835-5
J9 LECT NOTES COMPUT SC
PY 2008
VL 5182
BP 135
EP +
PG 3
WC Computer Science, Artificial Intelligence; Computer Science, Information
Systems; Computer Science, Theory & Methods
SC Computer Science
GA BIH48
UT WOS:000259488400013
ER
PT B
AU Lindstrom, P
Isenburg, M
AF Lindstrom, Peter
Isenburg, Martin
BE Storer, JA
Marcellin, MW
TI Lossless compression of hexahedral meshes
SO DCC: 2008 DATA COMPRESSION CONFERENCE, PROCEEDINGS
LA English
DT Proceedings Paper
CT 18th Data Compression Conference
CY MAR 25-27, 2008
CL Snowbird, UT
SP Brandeis Univ, Comp Sci Dept, IEEE Comp Soc
ID FLOATING-POINT DATA
AB Many science and engineering applications use high-resolution unstructured hexahedral meshes to model solid 3D shapes for finite element simulations. These simulations frequently dump the mesh and associated fields to disk for subsequent analysis, which involves the transfer of huge volumes of data. To reduce requirements on disk space and bandwidth, we propose efficient schemes for lossless online compression of hexahedral mesh geometry and connectivity. Our approach is to use hash-based value predictors to transform the mesh connectivity list into a more compact byte-aligned stream of symbols that can then be efficiently compressed using conventional text compressors such as gzip. Our scheme is memory efficient, fast, and simple to implement, and yields 1-3 orders of magnitude reduction on a set of benchmark meshes. For geometry and field coding, we derive a set of local spectral predictors optimized for each possible configuration of previously encoded and thus available vertices within a hexahedron. Combined with lossless floating-point residual coding, this approach improves considerably upon prior predictive geometry coding schemes.
C1 [Lindstrom, Peter; Isenburg, Martin] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Lindstrom, P (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
EM pl@llnl.gov; isenburg@llnl.gov
OI Lindstrom, Peter/0000-0003-3817-4199
NR 17
TC 2
Z9 2
U1 0
U2 1
PU IEEE COMPUTER SOC
PI LOS ALAMITOS
PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 USA
BN 978-0-7695-3121-2
PY 2008
BP 192
EP 201
DI 10.1109/DCC.2008.12
PG 10
WC Computer Science, Information Systems; Computer Science, Theory &
Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BHP84
UT WOS:000255196800020
ER
PT J
AU Sikes, EL
Burgess, SN
Grandpre, R
Guilderson, TP
AF Sikes, Elisabeth L.
Burgess, Samantha N.
Grandpre, Rachel
Guilderson, Thomas P.
TI Assessing modern deep-water ages in the New Zealand region using
deep-water corals
SO DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
LA English
DT Article
DE deep corals; radiocarbon
ID SEA CORALS; PACIFIC-OCEAN; NORTH-ATLANTIC; GROWTH-RATES; RADIOCARBON;
VARIABILITY; SOUTHERN; DEGLACIATION; VENTILATION; OTOLITHS
AB The radiocarbon levels of 19 deep-sea corals from scamounts and plateaus in the New Zealand region were determined to assess their ability to record contemporaneous radiocarbon levels in surrounding (in situ) waters. Four species of subthermocline-dwelling corals from 366 to 1680 m water depth were collected between 1964 and 2000 using dredge hauls. Carbonate directly underlying living polyps was analyzed for radiocarbon content. Corals underlying subantarctic waters to the south of the South Island and subtropical waters to the north of New Zealand were collected from 426 to 1680 m water depth and had Delta C-14 levels ranging from -11%. to -146%. (45-1200 C-14 years). These radiocarbon levels are in good agreement with the radiocarbon levels of the regional subthermocline waters, as determined for the Sigma CO2 in the waters by GEOSECS in 1974 and WOCE in 1992. The differences in Delta C-14 levels in corals sampled in the 1960s and 1990s trace a pattern of changing bomb radiocarbon influence on the carbon in subthermocline waters. The subtropical frontal zone, an area known for significant eddies and mesoscale mixing, sits astride the Chatham Rise to the east of New Zealand, and radiocarbon profiles there are correspondingly more complex. Corals collected on the Chatham Rise were retrieved from 366 to 1100 m and document Delta C-14 levels ranging from -116 parts per thousand to +12 parts per thousand (945 C-14 years before present to significantly bomb-influenced). Corals sampled from depths shallower than -500 m tended to have higher and more consistent levels of bomb-carbon input, whereas corals sampled from depths deeper than -800 m show little or no bomb-carbon influence. Published measurements of the radiocarbon levels of the dissolved inorganic carbon from a transect taken in 1988 across the Chatham Rise indicate localized injection of surface waters containing bomb radiocarbon to depths as great as 600 m, which appears to be faithfully recorded in the corals. These results indicate that deep corals record even decadal-scale changes in the radiocarbon signal of the water in which they grew, making them excellent recorders of deep-water radiocarbon past and present. (c) 2007 Elsevier Ltd. All rights reserved.
C1 [Sikes, Elisabeth L.; Grandpre, Rachel] Rutgers State Univ, Inst Marine & Coastal Sci, New Brunswick, NJ 08901 USA.
[Burgess, Samantha N.] Univ Auckland, Sch Environm & Marine Sci, Auckland 92019, New Zealand.
[Guilderson, Thomas P.] Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, Livermore, CA 94550 USA.
[Guilderson, Thomas P.] Univ Calif Santa Cruz, Inst Marine Sci, Dept Ocean Sci, Santa Cruz, CA 95064 USA.
RP Sikes, EL (reprint author), Rutgers State Univ, Inst Marine & Coastal Sci, 71 Dudley Rd, New Brunswick, NJ 08901 USA.
EM sikes@marine.rutgers.edu
NR 33
TC 6
Z9 6
U1 0
U2 7
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0967-0637
J9 DEEP-SEA RES PT I
JI Deep-Sea Res. Part I-Oceanogr. Res. Pap.
PD JAN
PY 2008
VL 55
IS 1
BP 38
EP 49
DI 10.1016/j.dsr.2007.10.004
PG 12
WC Oceanography
SC Oceanography
GA 264ZB
UT WOS:000253327800003
ER
PT J
AU Weijer, W
AF Weijer, Wilbert
TI Normal modes of the Mascarene Basin
SO DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
LA English
DT Article
DE barotropic modes; oscillations; shallow-water dynamics; eigenfunctions;
South Indian Ocean; Mascarene Basin; 42-64 degrees E; 2-32 degrees S
ID LATERAL DIFFUSIVITY; PLANETARY-WAVES; INDIAN-OCEAN; CIRCULATION;
PACIFIC; WATER
AB In this paper the origin of the bi-monthly variability in the Mascarene Basin is reconsidered. Free oscillatory modes of the Mascarene Basin are determined by performing normal mode analysis on the motionless solution in a barotropic shallow-water model with realistic bathymetry. Several modes are identified with monthly to bi-monthly time scales. The mode that agrees best with recent current meter observations can be interpreted as a barotropic Rossby basin mode, confined to the tilted geometry of the Mascarene Basin. (c) 2007 Elsevier Ltd. All rights reserved.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Weijer, W (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
EM wilbert@lanl.gov
RI Weijer, Wilbert/A-7909-2010
NR 15
TC 14
Z9 14
U1 0
U2 4
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0967-0637
J9 DEEP-SEA RES PT I
JI Deep-Sea Res. Part I-Oceanogr. Res. Pap.
PD JAN
PY 2008
VL 55
IS 1
BP 128
EP 136
DI 10.1016/j.dsr.2007.10.005
PG 9
WC Oceanography
SC Oceanography
GA 264ZB
UT WOS:000253327800007
ER
PT J
AU Hsueh, CH
Thompson, GA
Jadaan, OM
Wereszczak, AA
Becher, PF
AF Hsueh, C. H.
Thompson, G. A.
Jadaan, O. M.
Wereszczak, A. A.
Becher, P. F.
TI Analyses of layer-thickness effects in bilayered dental ceramics
subjected to thermal stresses and ring-on-ring tests
SO DENTAL MATERIALS
LA English
DT Article
DE biaxial flexure test; dental ceramics; bilayer; stress distribution;
failure origin
ID BIAXIAL FLEXURE TESTS; MECHANICAL-PROPERTIES; SURFACE-ROUGHNESS;
RESIDUAL-STRESSES; CORE MATERIALS; STRENGTH; PORCELAINS; COMPOSITE;
FRACTURE; FAILURE
AB Objectives. The purpose of this study was to analyze the stress distribution through the thickness of bilayered dental ceramics subjected to both thermal stresses and ring-on-ring tests and to systematically examine how the individual layer thickness influences this stress distribution and the failure origin.
Methods. Ring-on-ring tests were performed on In-Ceram Alumina/Vitadur Alpha porcelain bilayered disks with porcelain in the tensile side, and In-Ceram Alumina to porcelain layer thickness ratios of 1:2, 1:1, and 2:1 were used to characterize whether failure originated at the surface or the interface. Based on (1) the thermomechanical properties and thickness of each layer, (2) the difference between the test temperature and the glass transition temperature, and (3) the ring-on-ring loading configuration, the stress distribution through the thickness of the bilayer was calculated using closed-form solutions. Finite element analyses were also performed to verify the analytical results.
Results. The calculated stress distributions showed that the location of maximum tension during testing shifted from the porcelain surface to the In-Ceram Alumina/porcelain interface when the relative layer thickness ratio changed from 1:2 to 1:1 and to 2:1. This trend is in agreement with the experimental observations of the failure origins.
Significance. For bilayered dental ceramics subjected to ring-on-ring tests, the location of maximum tension can shift from the surface to the interface depending upon the layer thickness ratio. The closed-form solutions for bilayers subjected to both thermal stresses and ring-on-ring tests allow the biaxial strength of the bilayer to be evaluated. (c) 2007 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.
C1 [Hsueh, C. H.; Wereszczak, A. A.; Becher, P. F.] Oak Ridge Natl Lab, Mat Sci & Technol Lab, Oak Ridge, TN 37831 USA.
[Thompson, G. A.] US Army Dent & Trauma Res Detachment, Great Lakes, IL 60088 USA.
[Jadaan, O. M.] Univ Wisconsin, Coll Engn Math & Sci, Platteville, WI 53818 USA.
RP Hsueh, CH (reprint author), Oak Ridge Natl Lab, Mat Sci & Technol Lab, Oak Ridge, TN 37831 USA.
EM hsuehc@ornl.gov
RI Hsueh, Chun-Hway/G-1345-2011; Wereszczak, Andrew/I-7310-2016
OI Wereszczak, Andrew/0000-0002-8344-092X
NR 34
TC 35
Z9 37
U1 0
U2 16
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0109-5641
J9 DENT MATER
JI Dent. Mater.
PD JAN
PY 2008
VL 24
IS 1
BP 9
EP 17
DI 10.1016/j.dental.2006.12.009
PG 9
WC Dentistry, Oral Surgery & Medicine; Materials Science, Biomaterials
SC Dentistry, Oral Surgery & Medicine; Materials Science
GA 259BO
UT WOS:000252914300002
PM 17379295
ER
PT J
AU Garcia, ML
AF Garcia, Mary Lynn
BA Garcia, ML
BF Garcia, ML
TI Design and Evaluation of Physical Protection Systems
SO DESIGN AND EVALUATION OF PHYSICAL PROTECTION SYSTEMS, 2ND EDITION
LA English
DT Article; Book Chapter
C1 Sandia Natl Labs, Livermore, CA 94550 USA.
RP Garcia, ML (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA.
NR 5
TC 1
Z9 1
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
BN 978-0-08-055428-0
PY 2008
BP 1
EP 11
PG 11
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BEN65
UT WOS:000317483800002
ER
PT J
AU Garcia, ML
AF Garcia, Mary Lynn
BA Garcia, ML
BF Garcia, ML
TI Facility Characterization
SO DESIGN AND EVALUATION OF PHYSICAL PROTECTION SYSTEMS, 2ND EDITION
LA English
DT Article; Book Chapter
C1 Sandia Natl Labs, Livermore, CA 94550 USA.
RP Garcia, ML (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA.
NR 8
TC 1
Z9 1
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
BN 978-0-08-055428-0
PY 2008
BP 15
EP 23
PG 9
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BEN65
UT WOS:000317483800003
ER
PT B
AU Garcia, ML
AF Garcia, Mary Lynn
BA Garcia, ML
BF Garcia, ML
TI The Design and Evaluation of Physical Protection Systems Second Edition
Preface
SO DESIGN AND EVALUATION OF PHYSICAL PROTECTION SYSTEMS, 2ND EDITION
LA English
DT Editorial Material; Book Chapter
C1 Sandia Natl Labs, Livermore, CA 94550 USA.
RP Garcia, ML (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
BN 978-0-08-055428-0
PY 2008
BP XVII
EP XVIII
PG 2
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BEN65
UT WOS:000317483800001
ER
PT B
AU Garcia, ML
AF Garcia, Mary Lynn
BA Garcia, ML
BF Garcia, ML
TI Threat Definition
SO DESIGN AND EVALUATION OF PHYSICAL PROTECTION SYSTEMS, 2ND EDITION
LA English
DT Article; Book Chapter
C1 Sandia Natl Labs, Livermore, CA 94550 USA.
RP Garcia, ML (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA.
NR 10
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
BN 978-0-08-055428-0
PY 2008
BP 25
EP 41
PG 17
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BEN65
UT WOS:000317483800004
ER
PT B
AU Garcia, ML
AF Garcia, Mary Lynn
BA Garcia, ML
BF Garcia, ML
TI Target Identification
SO DESIGN AND EVALUATION OF PHYSICAL PROTECTION SYSTEMS, 2ND EDITION
LA English
DT Article; Book Chapter
C1 Sandia Natl Labs, Livermore, CA 94550 USA.
RP Garcia, ML (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA.
NR 6
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
BN 978-0-08-055428-0
PY 2008
BP 43
EP 54
PG 12
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BEN65
UT WOS:000317483800005
ER
PT J
AU Garcia, ML
AF Garcia, Mary Lynn
BA Garcia, ML
BF Garcia, ML
TI Physical Protection System Design
SO DESIGN AND EVALUATION OF PHYSICAL PROTECTION SYSTEMS, 2ND EDITION
LA English
DT Article; Book Chapter
C1 Sandia Natl Labs, Livermore, CA 94550 USA.
RP Garcia, ML (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA.
NR 1
TC 1
Z9 1
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
BN 978-0-08-055428-0
PY 2008
BP 57
EP 67
PG 11
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BEN65
UT WOS:000317483800006
ER
PT B
AU Garcia, ML
AF Garcia, Mary Lynn
BA Garcia, ML
BF Garcia, ML
TI Exterior Intrusion Sensors
SO DESIGN AND EVALUATION OF PHYSICAL PROTECTION SYSTEMS, 2ND EDITION
LA English
DT Article; Book Chapter
C1 Sandia Natl Labs, Livermore, CA 94550 USA.
RP Garcia, ML (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA.
NR 11
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
BN 978-0-08-055428-0
PY 2008
BP 69
EP 99
PG 31
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BEN65
UT WOS:000317483800007
ER
PT B
AU Garcia, ML
AF Garcia, Mary Lynn
BA Garcia, ML
BF Garcia, ML
TI Interior Intrusion Sensors
SO DESIGN AND EVALUATION OF PHYSICAL PROTECTION SYSTEMS, 2ND EDITION
LA English
DT Article; Book Chapter
C1 Sandia Natl Labs, Livermore, CA 94550 USA.
RP Garcia, ML (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA.
NR 8
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
BN 978-0-08-055428-0
PY 2008
BP 101
EP 125
PG 25
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BEN65
UT WOS:000317483800008
ER
PT B
AU Garcia, ML
AF Garcia, Mary Lynn
BA Garcia, ML
BF Garcia, ML
TI Alarm Assessment
SO DESIGN AND EVALUATION OF PHYSICAL PROTECTION SYSTEMS, 2ND EDITION
LA English
DT Article; Book Chapter
ID MOVEMENT
C1 Sandia Natl Labs, Livermore, CA 94550 USA.
RP Garcia, ML (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA.
NR 13
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
BN 978-0-08-055428-0
PY 2008
BP 127
EP 159
PG 33
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BEN65
UT WOS:000317483800009
ER
PT B
AU Garcia, ML
AF Garcia, Mary Lynn
BA Garcia, ML
BF Garcia, ML
TI Alarm Communication and Display
SO DESIGN AND EVALUATION OF PHYSICAL PROTECTION SYSTEMS, 2ND EDITION
LA English
DT Article; Book Chapter
C1 Sandia Natl Labs, Livermore, CA 94550 USA.
RP Garcia, ML (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
BN 978-0-08-055428-0
PY 2008
BP 161
EP 186
PG 26
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BEN65
UT WOS:000317483800010
ER
PT B
AU Garcia, ML
AF Garcia, Mary Lynn
BA Garcia, ML
BF Garcia, ML
TI Entry Control
SO DESIGN AND EVALUATION OF PHYSICAL PROTECTION SYSTEMS, 2ND EDITION
LA English
DT Article; Book Chapter
C1 Sandia Natl Labs, Livermore, CA 94550 USA.
RP Garcia, ML (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA.
NR 10
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
BN 978-0-08-055428-0
PY 2008
BP 187
EP 217
PG 31
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BEN65
UT WOS:000317483800011
ER
PT B
AU Garcia, ML
AF Garcia, Mary Lynn
BA Garcia, ML
BF Garcia, ML
TI Access Delay
SO DESIGN AND EVALUATION OF PHYSICAL PROTECTION SYSTEMS, 2ND EDITION
LA English
DT Article; Book Chapter
C1 Sandia Natl Labs, Livermore, CA 94550 USA.
RP Garcia, ML (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA.
NR 5
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
BN 978-0-08-055428-0
PY 2008
BP 219
EP 241
PG 23
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BEN65
UT WOS:000317483800012
ER
PT B
AU Garcia, ML
AF Garcia, Mary Lynn
BA Garcia, ML
BF Garcia, ML
TI Response
SO DESIGN AND EVALUATION OF PHYSICAL PROTECTION SYSTEMS, 2ND EDITION
LA English
DT Article; Book Chapter
C1 Sandia Natl Labs, Livermore, CA 94550 USA.
RP Garcia, ML (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA.
NR 7
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
BN 978-0-08-055428-0
PY 2008
BP 243
EP 259
PG 17
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BEN65
UT WOS:000317483800013
ER
PT B
AU Garcia, ML
AF Garcia, Mary Lynn
BA Garcia, ML
BF Garcia, ML
TI Analysis and Evaluation
SO DESIGN AND EVALUATION OF PHYSICAL PROTECTION SYSTEMS, 2ND EDITION
LA English
DT Article; Book Chapter
C1 Sandia Natl Labs, Livermore, CA 94550 USA.
RP Garcia, ML (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
BN 978-0-08-055428-0
PY 2008
BP 263
EP 271
PG 9
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BEN65
UT WOS:000317483800014
ER
PT B
AU Garcia, ML
AF Garcia, Mary Lynn
BA Garcia, ML
BF Garcia, ML
TI EASI Computer Model for Analysis
SO DESIGN AND EVALUATION OF PHYSICAL PROTECTION SYSTEMS, 2ND EDITION
LA English
DT Article; Book Chapter
C1 Sandia Natl Labs, Livermore, CA 94550 USA.
RP Garcia, ML (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA.
NR 2
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
BN 978-0-08-055428-0
PY 2008
BP 273
EP 290
PG 18
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BEN65
UT WOS:000317483800015
ER
PT B
AU Garcia, ML
AF Garcia, Mary Lynn
BA Garcia, ML
BF Garcia, ML
TI Risk Assessment
SO DESIGN AND EVALUATION OF PHYSICAL PROTECTION SYSTEMS, 2ND EDITION
LA English
DT Article; Book Chapter
C1 Sandia Natl Labs, Livermore, CA 94550 USA.
RP Garcia, ML (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA.
NR 1
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
BN 978-0-08-055428-0
PY 2008
BP 291
EP 298
PG 8
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BEN65
UT WOS:000317483800016
ER
PT B
AU Garcia, ML
AF Garcia, Mary Lynn
BA Garcia, ML
BF Garcia, ML
TI Process Applications
SO DESIGN AND EVALUATION OF PHYSICAL PROTECTION SYSTEMS, 2ND EDITION
LA English
DT Article; Book Chapter
C1 Sandia Natl Labs, Livermore, CA 94550 USA.
RP Garcia, ML (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA.
NR 9
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
BN 978-0-08-055428-0
PY 2008
BP 299
EP 314
PG 16
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BEN65
UT WOS:000317483800017
ER
PT B
AU Garcia, ML
AF Garcia, Mary Lynn
BA Garcia, ML
BF Garcia, ML
TI EASI Model
SO DESIGN AND EVALUATION OF PHYSICAL PROTECTION SYSTEMS, 2ND EDITION
LA English
DT Article; Book Chapter
C1 Sandia Natl Labs, Livermore, CA 94550 USA.
RP Garcia, ML (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
BN 978-0-08-055428-0
PY 2008
BP 319
EP 323
PG 5
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BEN65
UT WOS:000317483800018
ER
PT S
AU Kwan, TJT
Morgado, RE
Wang, TSF
Vodolaga, B
Terekhin, V
Onischenko, LM
Vorozhtsov, SB
Samsonov, EV
Vorozhtsov, AS
Alenitsky, YG
Perpelkin, EE
Glazov, AA
Novikov, DL
Parkhomchuk, V
Reva, V
Vostrikov, V
Mashinin, VA
Fedotov, SN
Minayev, SA
AF Kwan, T. J. T.
Morgado, R. E.
Wang, Tai-Sen F.
Vodolaga, B.
Terekhin, V.
Onischenko, L. M.
Vorozhtsov, S. B.
Samsonov, E. V.
Vorozhtsov, A. S.
Alenitsky, Yu. G.
Perpelkin, E. E.
Glazov, A. A.
Novikov, D. L.
Parkhomchuk, V.
Reva, V.
Vostrikov, V.
Mashinin, V. A.
Fedotov, S. N.
Minayev, S. A.
BE Schubert, H
Kuznetsov, A
TI Detection of explosives using nuclear resonance absorption of gamma rays
in nitrogen: A Russian/US collaboration
SO DETECTION OF LIQUID EXPLOSIVES AND FLAMMABLE AGENTS IN CONNECTION WITH
TERRORISM
SE NATO Science for Peace and Security Series B-Physics and Biophysics
LA English
DT Proceedings Paper
CT NATO Advanced Research Workshop on Detection of Liquid Explosives and
Flammable Agents in Connection with Terrorism
CY OCT 17-19, 2007
CL St Petersburg, RUSSIA
SP NATO
DE explosives detection; compact cyclotron; proton storage ring; electron
beam cooling; vacuum insulted tandem accelerator; gamma-ray
resonance-absorption (GRA); nuclear resonance-absorption (NRA); pulsed
fast neutron analysis (PFNA)
AB A summary of the work performed to date is presented. The project brings together accelerator scientists in the US and Russia to develop high-current charged-particle accelerators for applications to explosives detection. These include an electrostatic tandem accelerator of novel design and a compact cyclotron and storage ring with energy compensation and electron cooling.
C1 [Kwan, T. J. T.; Morgado, R. E.; Wang, Tai-Sen F.] Los Alamos Natl Lab, Los Alamos, NM 87544 USA.
[Vodolaga, B.; Terekhin, V.] All-Russia Sci Res Inst of Techn Phys, Snezhinsk, Russia.
[Onischenko, L. M.; Vorozhtsov, S. B.; Samsonov, E. V.; Vorozhtsov, A. S.; Alenitsky, Yu. G.; Perpelkin, E. E.; Glazov, A. A.; Novikov, D. L.] Joint Inst Nucl Res, Dubna, Russia.
[Parkhomchuk, V.; Reva, V.; Vostrikov, V.] Budker Inst Nucl Phys, Novosibirsk, Russia.
[Mashinin, V. A.; Fedotov, S. N.; Minayev, S. A.] Res firm IFI, Moscow, Russia.
RP Kwan, TJT (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87544 USA.
RI Parkhomchuk, Vasily/B-3835-2017
OI Parkhomchuk, Vasily/0000-0001-5833-0051
FU Nuclear Warhead Safety and Security Exchange (WSSX); Department of
Energy, NNSA [(NA-241)]
FX The authors would like to thanks Dr. Tsahi Gozani for the materials on
PFNA. This work was supported by the Nuclear Warhead Safety and Security
Exchange (WSSX) agreement, Department of Energy, NNSA (NA-241).
NR 8
TC 1
Z9 2
U1 0
U2 1
PU SPRINGER
PI DORDRECHT
PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS
SN 1871-465X
BN 978-1-4020-8465-2; 978-1-4020-8464-5
J9 NATO SCI PEACE SEC B
PY 2008
BP 97
EP +
DI 10.1007/978-1-4020-8466-9_10
PG 3
WC Biophysics; Social Issues
SC Biophysics; Social Issues
GA BHV01
UT WOS:000256621800010
ER
PT J
AU Pint, BA
AF Pint, B. A.
BE Gao, W
Li, Z
TI Design strategies for new oxidation-resistant high temperature alloys
SO DEVELOPMENTS IN HIGH TEMPERATURE CORROSION AND PROTECTION OF MATERIALS
SE Woodhead Publishing in Materials
LA English
DT Article; Book Chapter
ID ALUMINA-FORMING ALLOYS; AUSTENITIC STAINLESS-STEELS; GRAIN-BOUNDARY
SEGREGATION; NI-BASE SUPERALLOYS; FE-AL ALLOYS; WATER-VAPOR;
REACTIVE-ELEMENT; SCALE FORMATION; BREAKAWAY OXIDATION; FECRAL ALLOYS
C1 Oak Ridge Natl Lab, Mat Sci & Technol Div, Corros Sci & Technol Grp, Oak Ridge, TN 37831 USA.
RP Pint, BA (reprint author), Oak Ridge Natl Lab, Mat Sci & Technol Div, Corros Sci & Technol Grp, 1 Bethel Valley Rd,MS 6156, Oak Ridge, TN 37831 USA.
EM pintba@ornl.gov
NR 135
TC 4
Z9 4
U1 1
U2 6
PU WOODHEAD PUBL LTD
PI CAMBRIDGE
PA ABINGTON HALL ABINGTON, CAMBRIDGE CB1 6AH, CAMBS, ENGLAND
BN 978 1 84569 219 3
J9 WOODHEAD PUBL MATER
PY 2008
BP 398
EP 432
DI 10.1533/9781845694258.2.398
PG 35
WC Materials Science, Multidisciplinary
SC Materials Science
GA BOI93
UT WOS:000276786600013
ER
PT B
AU Lessing, P
AF Lessing, P.
BE Mindess, S
TI High-density and radiation-shielding concrete
SO DEVELOPMENTS IN THE FORMULATION AND REINFORCEMENT OF CONCRETE
SE Woodhead Publishing in Materials
LA English
DT Article; Book Chapter
ID PENETRATION DEPTH; PROJECTILES; TARGETS
C1 Idaho Natl Lab, Idaho Falls, ID 83415 USA.
RP Lessing, P (reprint author), Idaho Natl Lab, Box 1625, Idaho Falls, ID 83415 USA.
EM Paul.Lessing@INL.gov
NR 34
TC 0
Z9 0
U1 0
U2 0
PU WOODHEAD PUBL LTD
PI CAMBRIDGE
PA ABINGTON HALL ABINGTON, CAMBRIDGE CB1 6AH, CAMBS, ENGLAND
BN 978 1 84569 263 6
J9 WOODHEAD PUBL MATER
PY 2008
BP 44
EP 78
PG 35
WC Construction & Building Technology; Engineering, Civil; Materials
Science, Multidisciplinary
SC Construction & Building Technology; Engineering; Materials Science
GA BOH46
UT WOS:000276653100003
ER
PT S
AU Socha, JJ
De Carlo, F
AF Socha, John J.
De Carlo, Francesco
BE Stock, SR
TI Use of synchrotron tomography to image naturalistic anatomy in insects
SO DEVELOPMENTS IN X-RAY TOMOGRAPHY VI
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
(SPIE)
LA English
DT Proceedings Paper
CT 6h Conference on Developments in X-Ray Tomography
CY AUG 12-14, 2008
CL San Diego, CA
SP SPIE
DE synchrotron microtomography; anatomy; insect; tracheal system; muscle
ID RAY; MICROTOMOGRAPHY; MORPHOLOGY; SYSTEM
AB Understanding the morphology of anatomical structures is a cornerstone of biology. For small animals, classical methods such as histology have provided a wealth of data, but such techniques can be problematic due to destruction of the sample. More importantly, fixation and physical slicing can cause deformation of anatomy, a critical limitation when precise three-dimensional data are required. Modem techniques such as confocal microscopy, MRI, and tabletop x-ray microCT provide effective non-invasive methods, but each of these tools each has limitations including sample size constraints, resolution limits, and difficulty visualizing soft tissue. Our research group at the Advanced Photon Source (Argonne National Laboratory) studies physiological processes in insects, focusing on the dynamics of breathing and feeding. To determine the size, shape, and relative location of internal anatomy in insects, we use synchrotron microtomography at the beamline 2-BM to image structures including tracheal tubes, muscles, and gut. Because obtaining naturalistic, undeformed anatomical information is a key component of our studies, we have developed methods to image fresh and non-fixed whole animals and tissues. Although motion artifacts remain a problem, we have successfully imaged multiple species including beetles, ants, fruit flies, and butterflies. Here we discuss advances in biological imaging and highlight key findings in insect morphology.
C1 [Socha, John J.; De Carlo, Francesco] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
RP Socha, JJ (reprint author), Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
NR 12
TC 3
Z9 3
U1 2
U2 8
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7298-4
J9 P SOC PHOTO-OPT INS
PY 2008
VL 7078
AR 70780A
DI 10.1117/12.795210
PG 7
WC Instruments & Instrumentation; Optics; Physics, Applied
SC Instruments & Instrumentation; Optics; Physics
GA BIZ03
UT WOS:000263867300008
ER
PT S
AU Xiao, XH
De Carlo, F
Stock, SR
AF Xiao, Xianghui
De Carlo, Francesco
Stock, Stuart R.
BE Stock, SR
TI X-ray zoom-in tomography of calcified tissue
SO DEVELOPMENTS IN X-RAY TOMOGRAPHY VI
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
(SPIE)
LA English
DT Proceedings Paper
CT 6h Conference on Developments in X-Ray Tomography
CY AUG 12-14, 2008
CL San Diego, CA
SP SPIE
DE zoom-in tomography; medical imaging; bone; reconstruction errors;
microtomography
ID IMAGE-RECONSTRUCTION
AB X-ray computed tomography (XCT) is a powerful non-invasive imaging tool for biomedical applications. It provides not only morphology but also the absolute value of the linear attenuation coefficient distribution of the specimen in three dimensions, which is helpful in osteoporosis and other component-sensitive studies. Spatial resolution and specimen size are coupled through the detector's field of view (FOV) and the number of elements in the area detector. When the FOV is smaller than the specimen size, the truncated-data problem arises, which can cause large errors in the values of the volume elements (voxels) in the reconstruction. Zoom-in tomography is a technique that images a small region of interest (ROI) in a large-size specimen with high resolution and uses low-resolution data for the entire specimen to reduce reconstruction errors in the ROI. We developed a method to estimate the residual error in linear attenuation coefficient values persisting in zoom-in tomography and used it to judge the accuracy of zoom-in tomographic reconstructions. In this work, we imaged a sample of trabecular bone with zoom-in tomography and quantified differences in voxel values, concentrating on comparisons of low and high mineral regions of the bone.
C1 [Xiao, Xianghui; De Carlo, Francesco] Argonne Natl Lab, Argonne, IL 60439 USA.
RP Xiao, XH (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
NR 7
TC 4
Z9 4
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 978-0-8194-7298-4
J9 P SOC PHOTO-OPT INS
PY 2008
VL 7078
AR 707810
DI 10.1117/12.796638
PG 8
WC Instruments & Instrumentation; Optics; Physics, Applied
SC Instruments & Instrumentation; Optics; Physics
GA BIZ03
UT WOS:000263867300030
ER
PT S
AU Smedley, J
Ben-Zvi, I
Bohon, J
Chang, XY
Grover, R
Isakovic, A
Rao, T
Wu, Q
AF Smedley, John
Ben-Zvi, Ilan
Bohon, Jen
Chang, Xiangyun
Grover, Ranjan
Isakovic, Abdel
Rao, Triveni
Wu, Qiong
BE Nebel, CE
Jackman, RB
Nemanich, RJ
Nesladek, M
TI Diamond amplified photocathodes
SO DIAMOND ELECTRONICS - FUNDAMENTALS TO APPLICATIONS II
SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS
LA English
DT Proceedings Paper
CT Symposium on Diamond Electronics - Fundamentals to Applications II held
at the 2007 MRS Fall Meeting
CY NOV 26-30, 2007
CL Boston, MA
SP Mat Res Soc
ID ELECTRON; TRANSMISSION; FILMS
AB High-average-current linear electron accelerators require photoinjectors capable of delivering tens to hundreds of mA average current, with peak currents of hundreds of amps. Standard photocathodes face significant challenges in meeting these requirements, and often have short operational lifetimes in an accelerator environment. We report on recent progress toward development of secondary emission amplifiers for photocathodes, which are intended to increase the achievable average current while protecting the cathode from the accelerator.
The amplifier is a thin diamond wafer which converts energetic (few keV) primary electrons into hundreds of electron-bole pairs via secondary electron emission. The electrons drift through the diamond under an external bias and are emitted into vacuum via a hydrogen-terminated surface with negative electron affinity (NEA). Secondary emission gain of over 200 has been achieved. Two methods of patterning diamond, laser ablation and reactive-ion etching (RIE), are being developed to produce the required geometry. A variety of diagnostic techniques, including FTIR, SEM and AFM, have been used to characterize the diamonds.
C1 [Smedley, John; Ben-Zvi, Ilan; Chang, Xiangyun; Grover, Ranjan; Isakovic, Abdel; Rao, Triveni] Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Smedley, J (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
NR 12
TC 0
Z9 0
U1 0
U2 3
PU MATERIALS RESEARCH SOCIETY
PI WARRENDALE
PA 506 KEYSTONE DRIVE, WARRENDALE, PA 15088-7563 USA
SN 0272-9172
BN 978-1-55899-986-2
J9 MATER RES SOC SYMP P
PY 2008
VL 1039
BP 229
EP 234
PG 6
WC Chemistry, Applied; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA BHY88
UT WOS:000257510500026
ER
PT S
AU Cowell, AJ
Hale, K
Berka, C
Fuchs, S
Baskin, A
Jones, D
Davis, G
Johnson, R
Fatch, R
Marshall, E
AF Cowell, Andrew J.
Hale, Kelly
Berka, Chris
Fuchs, Sven
Baskin, Angela
Jones, David
Davis, Gene
Johnson, Robin
Fatch, Robin
Marshall, Eric
BE Cai, Y
TI Brainwave-Based Imagery Analysis
SO DIGITAL HUMAN MODELING: TRENDS IN HUMAN ALGORITHMS
SE Lecture Notes in Artificial Intelligence
LA English
DT Article; Book Chapter
DE Augmented cognition; electroencephalography; eye tracking; imagery
analysis
ID SPEED
AB Intelligence analysts are bombarded with enormous volumes of imagery that they must visually filter to identify relevant areas of interest. Interpretation of such data is subject to error due to (1) large data volumes, implying the need for faster and more effective processing, and (2) misinterpretation, implying the need for enhanced analyst/system effectiveness. This paper outlines the Revolutionary Accelerated Processing linage Detection (RAPID) System, designed to significantly improve data throughput and interpretation by incorporating advancing neurophysiological technology to monitor processes associated with detection and identification of relevant target stimuli in a non-invasive and temporally precise manner. Specifically, this work includes the development of innovative electroencephalographic (EEG) and eye tracking technologies to detect and flag areas of interest, potentially without an analyst's conscious intervention or motor responses, while detecting and mitigating problems with tacit knowledge, such as anchoring bias in real-time to reduce the possibility of human error.
C1 [Cowell, Andrew J.; Marshall, Eric] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Cowell, AJ (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA.
EM andrew@pnl.gov; kelly@designinteractive.net; chris@b-alert.com;
sven@designinteractive.net; angela@designinteractive.net;
david@designinteractive.net; gene@b-alert.com; rjohnson@b-alert.com;
rfatch@b-alert.com; eric.marshall@pnl.gov
NR 23
TC 1
Z9 1
U1 0
U2 1
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0302-9743
BN 978-3-540-89429-2
J9 LECT NOTES ARTIF INT
PY 2008
VL 4650
BP 17
EP 27
D2 10.1007/978-3-540-89430-8
PG 11
WC Computer Science, Artificial Intelligence
SC Computer Science
GA BKK11
UT WOS:000268354600002
ER
PT S
AU Ward, RC
Pouchard, LC
Munro, NB
Fischer, SK
AF Ward, Richard C.
Pouchard, Line C.
Munro, Nancy B.
Fischer, Sarah K.
BE Cai, Y
TI Virtual Human Problem-Solving Environments
SO DIGITAL HUMAN MODELING: TRENDS IN HUMAN ALGORITHMS
SE Lecture Notes in Artificial Intelligence
LA English
DT Article; Book Chapter
DE Virtual Human; Virtual Soldier; problem-solving environments; human
modeling and simulation; anatomy; physiology; graphical user interface
ID MODEL; SIMULATION; FLUID; LUNG
AB Interest in complex integrated digital or virtual human modeling has seen a significant increase over the last decade. Coincident with that increased interest, Oak Ridge National Laboratory (ORNL) initiated the development of a human simulation tool, the Virtual Human. The Virtual Human includes a problem-solving environment (PSE) for implementing the integration of physiological models in different programming languages and connecting physiological function to anatomy. The Virtual Human PSE (VHPSE) provides the computational framework with which to develop the concept of a "Virtual Human." Supporting the framework is a data definition for modeling parameters, PhysioML, a Virtual Human Database (VHDB), and a Web-based graphical user interface (GUI) developed using Java. Following description of the VHPSE, we discuss four example implementations of models within the framework.
Further expansion of a human modeling environment was carried out in the Defense Advanced Research Projects Agency Virtual Soldier Project. SCIRun served as the Virtual Soldier problem solving environment (VSPSE). We review and compare specific developments in these projects that have significant potential for the future of Virtual Human modeling and simulation. We conclude with an evaluation of areas of future work that will provide important extensions to the VHPSE and VSPSE and make possible a fully-integrated environment for human anatomical and physiological modeling: the Virtual Human.
C1 [Ward, Richard C.; Fischer, Sarah K.] Oak Ridge Natl Lab, Computat Sci & Engn Div, Oak Ridge, TN 37831 USA.
[Pouchard, Line C.] Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA.
[Munro, Nancy B.] Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
RP Ward, RC (reprint author), Oak Ridge Natl Lab, Computat Sci & Engn Div, POB 2008, Oak Ridge, TN 37831 USA.
EM wardrcl@ornl.gov; pouchardlc@ornl.gov; munronb@ornl.gov;
fischersk1@ornl.gov
NR 33
TC 0
Z9 0
U1 0
U2 0
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0302-9743
BN 978-3-540-89429-2
J9 LECT NOTES ARTIF INT
PY 2008
VL 4650
BP 108
EP 132
D2 10.1007/978-3-540-89430-8
PG 25
WC Computer Science, Artificial Intelligence
SC Computer Science
GA BKK11
UT WOS:000268354600007
ER
PT S
AU Williams, MB
Ridy, PG
More, MJ
Harvey, JA
Majewski, S
Proffitt, J
McKisson, J
Stolin, A
Kross, B
Stewart, A
Bullard, E
Kankaria, M
Janer, R
AF Williams, Mark B.
Ridy, Patricia G.
More, Mitali J.
Harvey, Jennifer A.
Majewski, Stan
Proffitt, James
McKisson, John
Stolin, Alexander
Kross, Brian
Stewart, Alexander
Bullard, Edward
Kankaria, Manish
Janer, Roman
BE Krupinski, EA
TI Tomographic dual modality breast scanner
SO DIGITAL MAMMOGRAPHY, PROCEEDINGS
SE Lecture Notes in Computer Science
LA English
DT Proceedings Paper
CT 9th International Workshop on Digital Mammography
CY JUL 20-23, 2008
CL Tucson, AZ
DE dual modality; tomosynthesis limited angle tomography; molecular breast
imaging; breast scintigraphy
ID POSITRON EMISSION MAMMOGRAPHY; DIGITAL TOMOSYNTHESIS; DETECTOR; PHANTOM;
RESOLUTION; CANCER; IMAGER
AB We are developing it breast scanner that obtains co-registered dual modality tomographic images of the breast using x-ray imaging (digital breast tomosynthesis) and gamma emission imaging (limited angle breast SPECT). The project is a collaborative effort among the Jefferson Lab (Newport News, VA), Dexela Ltd.. (Sudbury MA), and the University of Virginia (UVa) (Charlottesville, VA). The scanner is currently undergoing pilot clinical evaluation at UVa's Breast Care Center. Here we report on the design of the scanner, choice of acquisition parameters, and present some early phantom and human breast images.
C1 [Williams, Mark B.; Ridy, Patricia G.; More, Mitali J.; Harvey, Jennifer A.] Univ Virginia, Dept Radiol, Charlottesville, VA 22903 USA.
[Majewski, Stan; Proffitt, James; McKisson, John; Stolin, Alexander; Kross, Brian] Jefferson Lab, Newport News, VA USA.
[Stewart, Alexander; Bullard, Edward; Kankaria, Manish; Janer, Roman] Dexela Ltd, London, England.
RP Williams, MB (reprint author), Univ Virginia, Dept Radiol, Charlottesville, VA 22903 USA.
EM mbwilliams@virginia.edu
FU Susan [IMG99003050, IMG0402326]; National Institutes of Health
[CA69452]; US Army Medical Research and Materiel Command [BC980469];
Kincaid Foundation and the Patients and Friends Challenge via the UVa
Cancer Center; DOE Office of Biological and Environmental Research in
the Office of Science; DOE Office of Nuclear Physics
FX This project is funded in part by Susan G. Komen for the Cure
(IMG99003050, IMG0402326), the National Institutes of Health (R01
CA69452), the US Army Medical Research and Materiel Command (BC980469),
the Kincaid Foundation and the Patients and Friends Challenge via the
UVa Cancer Center. Additional support was provided by the DOE Office of
Biological and Environmental Research in the Office of Science and the
DOE Office of Nuclear Physics.
NR 25
TC 5
Z9 5
U1 0
U2 1
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0302-9743
BN 978-3-540-70537-6
J9 LECT NOTES COMPUT SC
PY 2008
VL 5116
BP 99
EP +
PG 3
WC Computer Science, Artificial Intelligence; Computer Science, Theory &
Methods; Imaging Science & Photographic Technology; Radiology, Nuclear
Medicine & Medical Imaging
SC Computer Science; Imaging Science & Photographic Technology; Radiology,
Nuclear Medicine & Medical Imaging
GA BID15
UT WOS:000258502700015
ER
PT S
AU Yu, KM
Scarpulla, MA
Shan, W
Wu, J
Beeman, JW
Jasinski, J
Liliental-Weber, Z
Dubon, OD
Walukiewicz, W
AF Yu, K. M.
Scarpulla, M. A.
Shan, W.
Wu, J.
Beeman, J. W.
Jasinski, J.
Liliental-Weber, Z.
Dubon, O. D.
Walukiewicz, W.
BE Erol, A
TI Energetic Beam Synthesis of Dilute Nitrides and Related Alloys
SO DILUTE III-V NITRIDE SEMICONDUCTORS AND MATERIAL SYSTEMS: PHYSICS AND
TECHNOLOGY
SE Springer Series in Materials Science
LA English
DT Article; Book Chapter
ID N ION-IMPLANTATION; ELECTRONIC BAND-STRUCTURE; HIGHLY MISMATCHED ALLOYS;
SOLAR-CELLS; THIN-FILMS; NITROGEN INCORPORATION; EPITAXIAL GAN(X)AS1-X;
ELECTRICAL-ACTIVITY; MUTUAL PASSIVATION; OPTICAL-PROPERTIES
AB Group III-V dilute nitrides, III-N-x-V1-x (with x up to 0.10) have exhibited many unusual properties as compared to conventional semiconductor alloys. Here we review studies on the synthesis of group III-V dilute nitrides by a highly nonequilibrium method: the combination of ion implantation, pulsed-laser melting (PLM), and rapid thermal annealing (RTA). Using this method, the formation of a wide variety of III-N-x-V1-x alloys including GaNxAs1-x, InNxP1-x, AlyGa1-yNxAs1-x, and GaNxAs1-x-yPy has been synthesized and their optical properties investigated. In particular, ion implantation followed by PLM has been successful in forming thermally stable thin films of GaNxAs1-x with x as high as 0.016 and structural and optical properties comparable to films grown by epitaxial deposition techniques with similar substitutional N content. Using the implantation, PLM technique group II-VI dilute oxide (II-O-VI) semiconductors, a direct analogue of the III-V diluted nitrides, have also been formed. In Zn1-xMnxTe, where the O level ties below the conduction band edge, it was demonstrated that incorporation of a small amount of oxygen leads to the formation of a narrow, oxygen-derived band of extended states located well below the conduction band edge of the ZnMnTe matrix. The three absorption edges of this material (similar to 0.73, 1.83, and 2.56 eV) cover the entire solar spectrum providing a material envisioned for the multiband, single junction, high-efficiency photovoltaic devices.
C1 [Yu, K. M.; Wu, J.; Liliental-Weber, Z.; Dubon, O. D.; Walukiewicz, W.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Elect Mat Program, Berkeley, CA 94720 USA.
[Scarpulla, M. A.] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA.
[Wu, J.; Dubon, O. D.] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
[Shan, W.] Intematix Inc, Fremont, CA 94538 USA.
[Jasinski, J.] Univ Calif Merced, Sch Engn, Merced, CA 95344 USA.
RP Yu, KM (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Elect Mat Program, Berkeley, CA 94720 USA.
EM kmyu@lbl.gov; mikes@engineering.ucsb.edu; wshan@intematix.com;
wuj@berkeley.edu; JWBeeman@lbl.gov; jjasinski@ucmerced.edu;
Z_Liliental-Weber@lbl.gov; oddubon@berkeley.edu; W_Walukiewicz@lbl.gov
RI Wu, Junqiao/G-7840-2011
OI Wu, Junqiao/0000-0002-1498-0148
NR 92
TC 0
Z9 0
U1 0
U2 2
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0933-033X
BN 978-3-540-74528-0
J9 SPRINGER SER MATER S
PY 2008
VL 105
BP 1
EP 34
D2 10.1007/978-3-540-74529-7
PG 34
WC Engineering, Electrical & Electronic; Materials Science,
Multidisciplinary; Optics; Physics, Applied
SC Engineering; Materials Science; Optics; Physics
GA BJM13
UT WOS:000266789300001
ER
PT S
AU Walukiewicz, W
Alberi, K
Wu, J
Shan, W
Yu, KM
Ager, JW
AF Walukiewicz, W.
Alberi, K.
Wu, J.
Shan, W.
Yu, K. M.
Ager, J. W., III
BE Erol, A
TI Electronic Band Structure of Highly Mismatched Semiconductor Alloys
SO DILUTE III-V NITRIDE SEMICONDUCTORS AND MATERIAL SYSTEMS: PHYSICS AND
TECHNOLOGY
SE Springer Series in Materials Science
LA English
DT Article; Book Chapter
ID MOLECULAR-BEAM EPITAXY; N ION-IMPLANTATION; COMPOSITION DEPENDENCE;
GAINNAS ALLOYS; QUANTUM-WELLS; TEMPERATURE-DEPENDENCE; GALLIUM
PHOSPHIDE; CONDUCTION-BAND; GAP REDUCTION; THIN-FILMS
AB The large changes in the electronic structure in dilute III-V nitrides and other semiconductor alloys containing isoelectronic impurities of high electronegativity or low ionization energy can be explained by the band anticrossing model. Interaction between the localized levels introduced by a highly electronegative impurity, such as N in GaNxAs1-x, and the delocalized states of the host semiconductor causes a restructuring of the conduction band into E+ and E- subbands, which in this case effectively lowers the conduction band edge of the alloy. This restructuring is not only responsible for the reduction of the fundamental band gap energy but also accounts for the direct band gap nature in GaNxP1-x, and the enhanced electron effective mass observed in GaNxAs1-x. Conversely, the incorporation of large-sized isoelectronic impurities with low ionization energy into III-V and II-VI compounds is found to induce a restructuring of the host valence band by the same anticrossing mechanism. Integration of the conduction and valence band anticrossing models provides an accurate description of the electronic structure of these alloys across their entire composition range.
C1 [Walukiewicz, W.; Alberi, K.; Wu, J.; Yu, K. M.; Ager, J. W., III] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Elect Mat Program, Berkeley, CA 94720 USA.
[Alberi, K.; Wu, J.] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
[Shan, W.] Intematix Inc, Fremont, CA 94538 USA.
RP Walukiewicz, W (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Elect Mat Program, Berkeley, CA 94720 USA.
EM W_Walukiewicz@lbl.gov; kalberi@berkeley.edu; wuj@berkeley.edu;
wshan@intematix.com; kmyu@lbl.gov; JWAger@lbl.gov
RI Wu, Junqiao/G-7840-2011
OI Wu, Junqiao/0000-0002-1498-0148
NR 65
TC 4
Z9 4
U1 0
U2 0
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0933-033X
BN 978-3-540-74528-0
J9 SPRINGER SER MATER S
PY 2008
VL 105
BP 65
EP 89
D2 10.1007/978-3-540-74529-7
PG 25
WC Engineering, Electrical & Electronic; Materials Science,
Multidisciplinary; Optics; Physics, Applied
SC Engineering; Materials Science; Optics; Physics
GA BJM13
UT WOS:000266789300003
ER
PT S
AU Demkowicz, MJ
Wang, J
Hoagland, RG
AF Demkowicz, Michael J.
Wang, Jian
Hoagland, Richard G.
BE Hirth, JP
TI Interfaces Between Dissimilar Crystalline Solids
SO DISLOCATIONS IN SOLIDS: A TRIBUTE TO F. R. N. NABARRO, VOL 14
SE Dislocations in Solids
LA English
DT Article; Book Chapter
ID EMBEDDED-ATOM METHOD; NANOSCALE CU/NB MULTILAYERS; FCC-BCC BOUNDARIES;
METALLIC COMPOSITES; THREADING DISLOCATIONS; MISFIT DISLOCATIONS;
SURFACE STEPS; THIN-FILMS; DEFECTS; MECHANISMS
C1 [Demkowicz, Michael J.; Wang, Jian; Hoagland, Richard G.] Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
RP Demkowicz, MJ (reprint author), Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
NR 71
TC 78
Z9 78
U1 1
U2 11
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1572-4859
BN 978-0-08-056498-2; 978-0-44-453166-7
J9 DISCLOC SOLIDS
PY 2008
VL 14
BP 141
EP 205
DI 10.1016/S1572-4859(07)00003-4
PG 65
WC Materials Science, Multidisciplinary
SC Materials Science
GA BCP52
UT WOS:000310966700004
ER
PT B
AU Podhorszki, N
Klasky, S
AF Podhorszki, Norbert
Klasky, Scott
BE Kacsuk, P
Lovas, R
Nemeth, Z
TI Workflows in a secure environment
SO DISTRIBUTED AND PARALLEL SYSTEMS: IN FOCUS: DESKTOP GRID COMPUTING
LA English
DT Proceedings Paper
CT 7th International Conference on Distributed and Parallel Systems
CY SEP, 2008
CL HUNGARY
AB Petascale simulations on the largest supercomputers in the US require advanced data management techniques in order to optimize the application scientist time, and to optimize the time spent on the supercomputers. Researchers in such problems are starting to require workflow automation during their simulations in order to monitor the simulations, and in order to automate many of the complex analysis which must take place from the data that is generated from these Simulations. Scientific workflows are being used to monitor simulations running on these supercomputers by applying a series of complex analysis, and finally producing images and movies from the variables produced in the simulation, or from the derived quantities produced by the analysis. The typical scenario is where the large calculation runs on the supercomputer, and the auxiliary diagnostics/monitors are run on resources, which are either on the local area network of the supercomputer, or over the wide area network. The supercomputers at one of the largest centers are highly secure, and the only method to log into the center is interactive authentication by using One Time Passwords (OTP) that are generated by a security device and expire in half a minute. Therefore, grid certificates are not a current option on these machines in the Department of Energy at Oak Ridge National Laboratory. In this paper we describe how we have extended the Kepler scientific workflow management system to be able to run operations on these supercomputers, how workflows themselves can be executed as batch jobs, and finally, how external data-transfer operations can be utilized when they need to perform authentication for their own as well.
C1 [Podhorszki, Norbert; Klasky, Scott] Oak Ridge Natl Lab, Oak Ridge, TN USA.
RP Podhorszki, N (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN USA.
NR 13
TC 0
Z9 0
U1 0
U2 3
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013, UNITED STATES
BN 978-0-387-79447-1
PY 2008
BP 143
EP 153
DI 10.1007/978-0-387-79448-8_13
PG 11
WC Computer Science, Software Engineering; Computer Science, Theory &
Methods
SC Computer Science
GA BIF10
UT WOS:000259036800013
ER
PT J
AU Adhikari, S
Kennel, SJ
Roy, G
Mitra, PS
Mitra, S
Roy, R
AF Adhikari, Sanjay
Kennel, Stephen J.
Roy, Gargi
Mitra, Partha S.
Mitra, Sankar
Roy, Rabindra
TI Discrimination of lesion removal of N-methylpurine-DNA glycosylase
revealed by a potent neutralizing monoclonal antibody
SO DNA REPAIR
LA English
DT Article
DE MPG; inhibition; substrate specificity; epitope mapping; base excision
repair
ID BASE EXCISION-REPAIR; HUMAN 3-METHYLADENINE-DNA GLYCOSYLASE;
ESCHERICHIA-COLI; SUBSTRATE-BINDING; ENDONUCLEASE-III; MOUSE; ENZYME;
PURIFICATION; RESIDUES; SPECIFICITY
AB N-Methylpurine-DNA glycosylase (MPG), a ubiquitous DNA repair enzyme, initiates excision repair of several N-alkylpurine adducts, induced by alkylating chemotherapeutics, and deaminated and lipid peroxidation-induced purine adducts. We have generated monoclonal antibodies (moAbs) against human MPG. Twelve independent hybridoma clones were characterized, which, except 520-16A, are identical based on epitope exclusion assay. Four moAbs, including 520-2A, 520-3A, 520-16A, and 520-26A, have high affinity (KD similar to 0.3-1.6 nM), and their subtypes were IgG(2a), IgG(1), IgG(2a), and IgG(2b), respectively. moAb 520-3A recognizes the sequence (52)AQAPCPRERCLGPP(66)T, an epitope exclusively present in the N-terminal extension of human MPG. We found that moAb 520-3A significantly inhibited MPG's enzymatic activity towards different substrates, such as hypoxanthine, 1,N(6)ethenoadenine and methylated bases, which represent different classes of DNA damage, however, with different efficiencies. Real-time binding experiments using surface plasmon resonance (SPR) spectroscopy showed that the pronounced inhibition of activity was not in the substrate-binding step. Single turnover kinetics (STO) revealed that the inhibition was at the catalytic step. Since we found that this antibody has an epitope in the N-terminal tail, the latter appears to have an important role in substrate discrimination, however, with a differential effect on different substrates. (C) 2007 Elsevier B.V. All rights reserved.
C1 [Adhikari, Sanjay; Roy, Gargi; Mitra, Partha S.; Roy, Rabindra] Georgetown Univ, Lombardi Comprehens Canc Ctr, Dept Oncol, Washington, DC 20057 USA.
[Kennel, Stephen J.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Mitra, Sankar] Univ Texas Galveston, Med Branch, Sealy Ctr Mol Sci, Galveston, TX 77555 USA.
RP Roy, R (reprint author), Georgetown Univ, Lombardi Comprehens Canc Ctr, Dept Oncol, Washington, DC 20057 USA.
EM rr228@georgetown.edu
FU NCI NIH HHS [R01 CA053791, R01 CA113447, R01 CA 92306, R01 CA092306, R01
CA092306-01A2, R01 CA 53791]
NR 36
TC 6
Z9 6
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1568-7864
J9 DNA REPAIR
JI DNA Repair
PD JAN 1
PY 2008
VL 7
IS 1
BP 31
EP 39
DI 10.1016/j.dnarep.2007.07.012
PG 9
WC Genetics & Heredity; Toxicology
SC Genetics & Heredity; Toxicology
GA 249MM
UT WOS:000252232600004
PM 17768096
ER
PT J
AU Pluth, JM
Yamazaki, V
Cooper, BA
Rydberg, BE
Kirchgessner, CU
Cooper, PK
AF Pluth, Janice M.
Yamazaki, Vikky
Cooper, Brian A.
Rydberg, Bjorn E.
Kirchgessner, Cordula U.
Cooper, Priscilla K.
TI DNA double-strand break and chromosomal rejoining defects with
misrejoining in Nijmegen breakage syndrome cells
SO DNA REPAIR
LA English
DT Article
DE Nbs1; MRN complex; DNA double-strand break repair; misrejoining; PCC
fragments; translocations
ID PHOSPHORYLATED HISTONE H2AX; ATAXIA-TELANGIECTASIA; HUMAN FIBROBLASTS;
HOMOLOGOUS RECOMBINATION; DAMAGE RESPONSE; SACCHAROMYCES-CEREVISIAE;
GAMMA-H2AX FOCI; PROTEIN COMPLEX; REPAIR DEFECT; MRE11 COMPLEX
AB NBS1-deficient cells exhibit pronounced radiosensitivity and defects in chromosome integrity after ionizing radiation (IR) exposure, yet show only a minor defect in DNA double-strand break (DSB) rejoining, leaving an as yet unresolved enigma as to the nature of the radiosensitivity of these cells. To further investigate the relationship between radiosensitivity, DSB repair, and chromosome stability we have compared cytological and molecular assays of DSB misrejoining and repair in NBS1-defective, wild type, and NBS1-complemented cells after IR damage. Our findings suggest a subtle defect in overall DSB rejoining in NBS1-defective cells and uniquely also reveal reduced ability of NBS1-defective cells to rejoin correct ends of DSBs. In agreement with published results, one of two different NBS1-defective cell lines showed a slight defect in overall rejoining of DSBs compared to its complemented counterpart, whereas another NBS line did not show any difference from wild type cells. Significant defects in the Correct rejoining of DSBs compared to their respective controls were observed for both NBS1-defective lines. The defect in DSB rejoining and the increased misrejoining detected at the molecular level were also reflected in higher levels of fragments and translocations, respectively, at the chromosomal level. This work provides both molecular and cytological evidence that NBS1-deficient cells have defects in DSB processing and reveals that these molecular events can be manifest cytologically. (C) 2007 Elsevier B.V. All rights reserved.
C1 [Pluth, Janice M.; Cooper, Brian A.; Rydberg, Bjorn E.; Cooper, Priscilla K.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA.
[Yamazaki, Vikky] Synamem Corp, Burlingame, CA USA.
[Kirchgessner, Cordula U.] Stanford Univ, Sch Med, Dept Radiat Oncol, Canc Biol Res Lab, Stanford, CA USA.
RP Pluth, JM (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM jmpluth@lbl.gov
FU NCI NIH HHS [CA75401, CA80207]; NIGMS NIH HHS [5-T32-GM08294]
NR 50
TC 14
Z9 15
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1568-7864
J9 DNA REPAIR
JI DNA Repair
PD JAN 1
PY 2008
VL 7
IS 1
BP 108
EP 118
DI 10.1016/j.dnarep.2007.08.004
PG 11
WC Genetics & Heredity; Toxicology
SC Genetics & Heredity; Toxicology
GA 249MM
UT WOS:000252232600012
PM 17919995
ER
PT J
AU Moschler, WW
Hanson, GR
AF Moschler, William W.
Hanson, Gregory R.
TI Microwave moisture measurement system for hardwood lumber drying
SO DRYING TECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 10th IUFRO International Wood Drying Conference
CY AUG, 2007
CL Orono, ME
SP IUFRO
DE hardwood; kiln dry; microwave; moisture content; moisture sensor
AB The goal of this project was to develop a prototype microwave-based moisture sensor system suitable for the kiln drying of hardwood lumber. The moisture sensors developed are battery powered and are capable of communicating with a host kiln control system via spread spectrum wireless communications. We have developed two designs of the sensors working at 4.5 to 6GHz with linear response to moisture content (MC) over a range of 6-100%. These sensors allow us to make a swept frequency microwave transmission measurement through a small area of a board. Using the prototype electronics and sensors, we have obtained measurements of MC over the above MC range for red oak and yellow poplar with standard deviations of less than 1.5% MC. We have developed data for board thickness corrections and for temperature corrections for the MC measurement system.
C1 [Moschler, William W.] Univ Tennessee, Tennessee Forest Prod Ctr, Knoxville, TN 37996 USA.
[Hanson, Gregory R.] Oak Ridge Natl Lab, RF & Microwave Syst Grp, Oak Ridge, TN USA.
RP Moschler, WW (reprint author), Univ Tennessee, Tennessee Forest Prod Ctr, 2506 Jacob Dr, Knoxville, TN 37996 USA.
EM bmoschle@utk.edu
NR 7
TC 6
Z9 6
U1 0
U2 4
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 0737-3937
J9 DRY TECHNOL
JI Dry. Technol.
PY 2008
VL 26
IS 9
BP 1155
EP 1159
DI 10.1080/07373930802266264
PG 5
WC Engineering, Chemical; Engineering, Mechanical
SC Engineering
GA 336NM
UT WOS:000258370900014
ER
PT S
AU Nutaro, J
Jarboe, S
Zeigler, B
Fulton, D
AF Nutaro, James
Jarboe, Stephanie
Zeigler, Bernard
Fulton, Dale
BE Roberts, D
ElSaddik, A
Ferscha, A
TI A Method for Generating Synthetic Air Tracks
SO DS-RT 2008: 12TH 2008 IEEE/ACM INTERNATIONAL SYMPOSIUM ON DISTRIBUTED
SIMULATION AND REAL TIME APPLICATIONS, PROCEEDINGS
SE IEEE ACM International Symposium on Distributed Simulation and Real-Time
Applications
LA English
DT Proceedings Paper
CT 12th IEEE/ACM International Symposium on Distributed Simulation and Real
Time Applications
CY OCT 27-29, 2008
CL Vancouver, CANADA
SP IEEE, ACM, IEEE Comp Soc, Tech Comm Parallel Proc, IEEE Comp Soc,Tecn Comm Simulat, IEEE Comp Soc,Tech Comm Comp Architect, ACM SIGSIM
AB This paper describes a method for creating synthetic air tracks without the aide of a sophisticated simulator The proposed method creates a position and velocity Junction for an aircraft given its starting location and speed, altitude, and heading on each leg of its flight. An optimization procedure is used to fit the position and velocity Junctions to the supplied data. Several examples of tracks produced by the method are shown in the paper The synthetic tracks that are produced by this method can be used to facilitate testing of command and controls systems and to enhance any simulation that requires air tracks that satisfy specific constraints on time, speed, and position.
C1 [Nutaro, James] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Jarboe, Stephanie; Zeigler, Bernard] Arizon Ctr Integrat Model & Simulat, Tucson, AZ 85701 USA.
[Fulton, Dale] Joint Interoperabil Test Command, Ft Huachuca, AZ USA.
RP Nutaro, J (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
EM nutarojj@ornl.gov; sjarboe@email.arizona.edu; zeigler@ece.arizona.edu;
dale.fulton.cr@disa.mil
OI Nutaro, James/0000-0001-7360-2836
FU UT-Battelle, LLC [DE-AC05-00OR22725]; U.S. Department of Energy
FX This manuscript has been authored by UT-Battelle, LLC, under contract
DE-AC05-00OR22725 with the U.S. Department of Energy. The United States
Government retains and the publisher, by accepting the article for
publication, acknowledges that the United States Government retains a
non-exclusive, paid-up, irrevocable, world-wide license to publish or
reproduce the published form of this manuscript, or allow others to do
so, for United States Government purposes.
NR 6
TC 0
Z9 0
U1 0
U2 0
PU IEEE COMPUTER SOC
PI LOS ALAMITOS
PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 USA
SN 1550-6525
BN 978-0-7695-3425-1
J9 IEEE ACM DIS SIM
PY 2008
BP 245
EP +
DI 10.1109/DS-RT.2008.19
PG 2
WC Computer Science, Hardware & Architecture; Engineering, Electrical &
Electronic
SC Computer Science; Engineering
GA BIT44
UT WOS:000262507400030
ER
PT S
AU Sun, Y
Nutaro, J
AF Sun, Yi
Nutaro, James
BE Roberts, D
ElSaddik, A
Ferscha, A
TI Performance Improvement Using Parallel Simulation Protocol and Time Warp
for DEVS Based Applications
SO DS-RT 2008: 12TH 2008 IEEE/ACM INTERNATIONAL SYMPOSIUM ON DISTRIBUTED
SIMULATION AND REAL TIME APPLICATIONS, PROCEEDINGS
SE IEEE ACM International Symposium on Distributed Simulation and Real-Time
Applications
LA English
DT Proceedings Paper
CT 12th IEEE/ACM International Symposium on Distributed Simulation and Real
Time Applications
CY OCT 27-29, 2008
CL Vancouver, CANADA
SP IEEE, ACM, IEEE Comp Soc, Tech Comm Parallel Proc, IEEE Comp Soc,Tecn Comm Simulat, IEEE Comp Soc,Tech Comm Comp Architect, ACM SIGSIM
AB DEVS is a formalism intended to model both discrete and continuous systems. The use of discrete events, rather than time steps, as the basis for simulation has been shown to reduce the computation time in many applications. parallel DEVS is an extension to standard DEVS, which provides means to handle simultaneous scheduling. In this paper, we present an implementation of the parallel DEVS simulation protocol that uses a modified Time Warp optimistic algorithm for shared memory multiprocessor machine. This implementation is designed to execute the DEVS models in parallel and, at the same time to correctly simulate every model defined in terms of DEVS specification. Two test cases and the DEVSFIRE example are used to verify this algorithm. Preliminary experimental results at-e presented that show the implementation can speedup a DEVS simulation.
C1 [Sun, Yi] Georgia State Univ, Dept Comp Sci, 34 Peachtree St,Suite 1405, Atlanta, GA 30303 USA.
[Nutaro, James] Oak Ridge Natl Lab, Dept Comp & Engn, Oak Ridge, TN 37831 USA.
RP Sun, Y (reprint author), Georgia State Univ, Dept Comp Sci, 34 Peachtree St,Suite 1405, Atlanta, GA 30303 USA.
EM syish@hotmail.com; nutarojj@ornl.gov
OI Nutaro, James/0000-0001-7360-2836
NR 21
TC 0
Z9 0
U1 0
U2 0
PU IEEE COMPUTER SOC
PI LOS ALAMITOS
PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 USA
SN 1550-6525
BN 978-0-7695-3425-1
J9 IEEE ACM DIS SIM
PY 2008
BP 277
EP +
DI 10.1109/DS-RT.2008.24
PG 3
WC Computer Science, Hardware & Architecture; Engineering, Electrical &
Electronic
SC Computer Science; Engineering
GA BIT44
UT WOS:000262507400034
ER
PT J
AU Lobell, DB
Bonfils, C
Faures, JM
AF Lobell, David B.
Bonfils, Celine
Faures, Jean-Marc
TI The role of irrigation expansion in past and future temperature trends
SO EARTH INTERACTIONS
LA English
DT Article
DE land use; climate
ID GREAT-PLAINS; CLIMATE; WATER
AB Expansion of irrigated land can cause local cooling of daytime temperatures by up to several degrees Celsius. Here the authors compare the expected cooling associated with rates of irrigation expansion in developing countries for historical (1961-2000) and future (2000-30) periods with climate model predictions of temperature changes from other forcings, most notably increased atmospheric greenhouse gas levels, over the same periods. Indirect effects of irrigation on climate, via methane production in paddy rice systems, were not considered. In regions of rapid irrigation growth over the past 40 yr, such as northwestern India and northeastern China, irrigation's expected cooling effects have been similar in magnitude to climate model predictions of warming from greenhouse gases. A masking effect of irrigation can therefore explain the lack of significant increases in observed growing season maximum temperatures in these regions and the apparent discrepancy between observations and climate model simulations. Projections of irrigation for 2000 - 30 indicate a slowing of expansion rates, and therefore cooling from irrigation expansion over this time period will very likely be smaller than in recent decades. At the same time, warming from greenhouse gases will likely accelerate, and irrigation will play a relatively smaller role in agricultural climate trends. In many irrigated regions, therefore, temperature projections from climate models, which generally ignore irrigation, may be more accurate in predicting future temperature trends than their performance in reproducing past observed trends in irrigated regions would suggest.
C1 [Lobell, David B.] Stanford Univ, Program Food Secur & Environm, Stanford, CA 94305 USA.
[Bonfils, Celine] Lawrence Livermore Natl Lab, Livermore, CA USA.
[Faures, Jean-Marc] Food & Agr Org, Land & Water Div, Rome, Italy.
RP Lobell, DB (reprint author), Stanford Univ, Program Food Secur & Environm, Y2E2 Bldg,MC4205,473 Via Ortega, Stanford, CA 94305 USA.
EM dlobell@stanford.edu
RI Bonfils, Celine/H-2356-2012
OI Bonfils, Celine/0000-0002-4674-5708
NR 22
TC 16
Z9 16
U1 2
U2 7
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 1087-3562
J9 EARTH INTERACT
JI Earth Interact.
PY 2008
VL 12
BP 1
EP 11
AR 3
DI 10.1175/2007EI241.1
PG 11
WC Geosciences, Multidisciplinary
SC Geology
GA 311ZU
UT WOS:000256639700001
ER
PT J
AU Ruane, AC
Roads, JO
AF Ruane, Alex C.
Roads, John O.
TI Diurnal to annual precipitation sensitivity to convective and land
surface schemes
SO EARTH INTERACTIONS
LA English
DT Article
ID ENERGY BUDGETS; UNITED-STATES; MODEL; REANALYSIS; WATER; CYCLE; CEOP;
SIMULATIONS; MOISTURE
AB Precipitation's diurnal to annual variance distribution and atmospheric water cycle component interactions are examined globally for sensitivity to convective and land surface schemes. The main regional features of statistics identified in previous reanalyses are robust in unconstrained continuous simulations corresponding to the reanalyses' convective and land surface schemes. A change from the simplified Arakawa-Schubert (SAS) to the relaxed Arakawa-Schubert (RAS) convection scheme reorganizes the variance of rainfall at low latitudes to a redder spectrum. Despite the potential increase in soil moisture memory, a change from the Oregon State University (OSU2) to the Noah land surface model does not noticeably affect the variance distribution of land surface model does not noticeably affect the variance distribution of precipitation. The competition between dynamic and thermodynamic.
C1 [Ruane, Alex C.] Oak Ridge Associated Univ, NASA, Goddard Inst Space Studies, Natl Aeronaut & Space Adm Postdoctoral Program, New York, NY 10025 USA.
[Ruane, Alex C.; Roads, John O.] Univ Calif San Diego, Expt Climate Predict Ctr, Scripps Inst Oceanog, San Diego, CA 92103 USA.
RP Ruane, AC (reprint author), Oak Ridge Associated Univ, NASA, Goddard Inst Space Studies, Natl Aeronaut & Space Adm Postdoctoral Program, 2880 Broadway, New York, NY 10025 USA.
EM aruane@giss.nasa.gov
NR 24
TC 0
Z9 0
U1 2
U2 4
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 1087-3562
J9 EARTH INTERACT
JI Earth Interact.
PY 2008
VL 12
AR 5
DI 10.1175/2008EI256.1
PG 13
WC Geosciences, Multidisciplinary
SC Geology
GA 320PC
UT WOS:000257246300001
ER
PT J
AU Breshears, DD
McDowell, NG
Goddard, KL
Dayem, KE
Martens, SN
Meyer, CW
Brown, KM
AF Breshears, David D.
McDowell, Nathan G.
Goddard, Kelly L.
Dayem, Katherine E.
Martens, Scott N.
Meyer, Clifton W.
Brown, Karen M.
TI Foliar absorption of intercepted rainfall improves woody plant water
status most during drought
SO ECOLOGY
LA English
DT Article
DE climate change impacts; Juniperus monosperma; plant physiological
ecology; plaw water potential; vegetation dynamics
ID OXYGEN-ISOTOPE RATIOS; JUNIPERUS-MONOSPERMA; FUNCTIONAL TYPES;
SOIL-MOISTURE; PINUS-EDULIS; ECOSYSTEMS; PULSES; FOREST; LEAVES; XYLEM
AB A large proportion of rainfall in dryland ecosystems is intercepted by plant foliage and is generally assumed to evaporate to the atmosphere or drip onto the soil surface without being absorbed. We demonstrate foliar absorption of intercepted rainfall in a widely distributed, continental dryland, woody-plant genus: Juniperus. We observed substantial improvement in plant water status, exceeding 1.0 MPa water potential for drought-stressed plants, following precipitation on an experimental plot that excluded soil water infiltration. Experiments that wetted shoots with unlabeled and with isotopically labeled water confirmed that water potential responded substantially to foliar wetting, that these responses were not attributable to re-equilibration with other portions of the xylem, and that magnitude of response increased with water stress. Foliar absorption is not included in most ecological, hydrological, and atmospheric models; has implications for interpreting plant isotopic signatures; and not only supplements water acquisition associated with increases in soil Moisture that follow large or repeated precipitation events, but also enables plants to bypass soil water uptake and benefit from the majority of precipitation events, which wet foliage but do not increase soil moisture substantially. Foliar absorption of intercepted water could be more important than previously appreciated, especially during drought when water stress is greatest.
C1 [Breshears, David D.] Univ Arizona, Sch Nat Resources, Inst Study Planet Earth, Tucson, AZ 85721 USA.
[Breshears, David D.] Univ Arizona, Dept Ecol & Evolutionary Biol, Tucson, AZ 85721 USA.
[McDowell, Nathan G.; Meyer, Clifton W.; Brown, Karen M.] Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA.
[Dayem, Katherine E.] Univ Colorado, Dept Geol Sci, Boulder, CO 80309 USA.
RP Breshears, DD (reprint author), Univ Arizona, Sch Nat Resources, Inst Study Planet Earth, Tucson, AZ 85721 USA.
EM daveb@email.arizona.edu
RI Breshears, David/B-9318-2009
OI Breshears, David/0000-0001-6601-0058
NR 47
TC 70
Z9 76
U1 2
U2 50
PU ECOLOGICAL SOC AMER
PI WASHINGTON
PA 1990 M STREET NW, STE 700, WASHINGTON, DC 20036 USA
SN 0012-9658
J9 ECOLOGY
JI Ecology
PD JAN
PY 2008
VL 89
IS 1
BP 41
EP 47
DI 10.1890/07-0437.1
PG 7
WC Ecology
SC Environmental Sciences & Ecology
GA 270JN
UT WOS:000253717200006
PM 18376545
ER
PT J
AU Dale, VH
Akhtar, F
Aldridge, M
Baskaran, L
Berry, M
Browne, M
Chang, M
Efroymson, R
Garten, C
Lingerfelt, E
Stewart, C
AF Dale, Virginia H.
Akhtar, Farhan
Aldridge, Matthrew
Baskaran, Latha
Berry, Michael
Browne, Murray
Chang, Michael
Efroymson, Rebecca
Garten, Charles
Lingerfelt, Eric
Stewart, Catherine
TI Modeling the Effects of Land Use on the Quality of Water, Air, Noise,
and Habitat for a Five-County Region in Georgia
SO ECOLOGY AND SOCIETY
LA English
DT Article
DE gopher tortoise; land use; landscape change; longleaf pine; nutrient
export; Red-cockaded Woodpecker; simulation
ID CELLULAR-AUTOMATON MODEL; GOPHER TORTOISE; SAN-FRANCISCO; MANAGEMENT;
NITROGEN; FOREST
AB A computer simulation model, the Regional Simulator (RSim), was constructed to project how land-use changes affect the quality of water, air, noise, and habitat of species of special concern. RSim was designed to simulate these environmental impacts for five counties in Georgia that surround and include Fort Benning. The model combines existing data and modeling approaches to simulate the effects of land-cover changes on: nutrient export by hydrological unit; peak 8-h average ozone concentrations; noise caused by small arms and blasts; and habitat changes for the rare Red-cockaded Woodpecker (Picoides borealis) and gopher tortoise (Gopherus polyphemus). The model also includes submodules for urban growth, new urbanization influenced by existing roads, nonurban land cover transitions, and a new military training area under development at Fort Benning. The model was run under scenarios of business as usual (BAU) and greatly increased urban growth for the region. The projections show that the effects of high urban growth will likely differ from those of BAU for noise and nitrogen and phosphorus loadings to surface water, but not for peak airborne ozone concentrations, at least in the absence of associated increases in industry and transportation use or technology changes. In both scenarios, no effects of urban growth are anticipated for existing populations of the federally endangered Red-cockaded Woodpecker. In contrast, habitat for gopher tortoise in the five-county region is projected to decline by 5 and 40% in the BAU and high urban growth scenarios, respectively. RSim is designed to assess the relative environmental impacts of planned activities both inside and outside military installations and to address concerns related to encroachment and transboundary influences.
C1 [Akhtar, Farhan; Chang, Michael] Georgia Inst Technol, Atlanta, GA 30332 USA.
[Aldridge, Matthrew; Berry, Michael; Browne, Murray; Lingerfelt, Eric] Univ Tennessee, Knoxville, TN 37996 USA.
[Baskaran, Latha; Efroymson, Rebecca; Garten, Charles] Oak Ridge Natl Lab, Oak Ridge, TN USA.
[Stewart, Catherine] Aberdeen Proving Ground, Aberdeen, Scotland.
RI Dale, Virginia/B-6023-2009; Baskaran, Latha/D-9754-2016
OI Baskaran, Latha/0000-0001-8487-3914
NR 23
TC 2
Z9 2
U1 1
U2 9
PU RESILIENCE ALLIANCE
PI WOLFVILLE
PA ACADIA UNIV, BIOLOGY DEPT, WOLFVILLE, NS B0P 1X0, CANADA
SN 1708-3087
J9 ECOL SOC
JI Ecol. Soc.
PY 2008
VL 13
IS 1
AR 10
PG 22
WC Ecology; Environmental Studies
SC Environmental Sciences & Ecology
GA 376IA
UT WOS:000261176100020
ER
PT S
AU Wang, JA
Rao, NSV
Konduri, S
AF Wang, J. A.
Rao, N. S. V.
Konduri, S.
BE Lott, RG
Busby, JT
TI Information Fusion Embrittlement Models for US Power Reactor Pressure
Vessel Steels
SO EFFECTS OF RADIATION ON MATERIALS: 23RD INTERNATIONAL SYMPOSIUM
SE American Society for Testing and Materials Special Technical
Publications
LA English
DT Proceedings Paper
CT 23rd International Symposium on Effects of Radiation on Materials
CY JUN 13-15, 2006
CL San Jose, CA
SP ASTM Int Comm E10 Nucl Technol & Applicat
DE power reactor; reactor pressure vessel embrittlement; information
fusion; radiation damage
ID SENSOR
AB A new approach of utilizing information fusion technique is developed to predict the radiation embrittlement of reactor pressure vessel steels. The Charpy transition temperature shift data contained in the Power Reactor Embrittlement Database is used in this study. Six parameters-Cu, Ni, P, neutron fluence, irradiation time, and irradiation temperature-are used in the embrittlement prediction models. The results indicate that this new embrittlement predictor achieved reductions of about 49.5 % and 52 % in the uncertainties for plate and weld data, respectively, for pressurized water reactor and boiling water reactor data, compared with the Nuclear Regulatory Commission Regulatory Guide 1.99, Rev. 2. The implications of dose-rate effect and irradiation temperature effects for the development of radiation embrittlement models are also discussed.
C1 [Wang, J. A.; Rao, N. S. V.; Konduri, S.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Wang, JA (reprint author), Oak Ridge Natl Lab, 1 Bethel Valley Rd, Oak Ridge, TN 37831 USA.
EM wangja@ornl.gov
OI Rao, Nageswara/0000-0002-3408-5941; Wang, Jy-An/0000-0003-2402-3832
NR 25
TC 0
Z9 0
U1 0
U2 1
PU AMERICAN SOCIETY TESTING AND MATERIALS
PI W CONSHOHOCKEN
PA 100 BARR HARBOR DRIVE, W CONSHOHOCKEN, PA 19428-2959 USA
SN 1040-1695
BN 978-0-8031-3421-8
J9 AM SOC TEST MATER
PY 2008
VL 1492
BP 95
EP 118
DI 10.1520/STP46567S
PG 24
WC Materials Science, Multidisciplinary; Materials Science,
Characterization & Testing; Physics, Applied
SC Materials Science; Physics
GA BIT65
UT WOS:000262627400008
ER
PT S
AU Byun, TS
Hashimoto, N
AF Byun, T. S.
Hashimoto, N.
BE Lott, RG
Busby, JT
TI Strain Hardening During Mechanical Twinning and Dislocation Channeling
in Irradiated 316 Stainless Steels
SO EFFECTS OF RADIATION ON MATERIALS: 23RD INTERNATIONAL SYMPOSIUM
SE American Society for Testing and Materials Special Technical
Publications
LA English
DT Proceedings Paper
CT 23rd International Symposium on Effects of Radiation on Materials
CY JUN 13-15, 2006
CL San Jose, CA
SP ASTM Int Comm E10 Nucl Technol & Applicat
DE radiation effect; strain-hardening behavior; strain localization;
dislocation channels; mechanical twins; long-range back stress; pileup
dislocations
ID LOW-TEMPERATURE IRRADIATION; TARGET CONTAINER MATERIALS; COPPER SINGLE
CRYSTALS; POLYCRYSTALLINE METALS; DEFORMATION MICROSTRUCTURES;
NEUTRON-IRRADIATION; LOCALIZED DEFORMATION; PLASTIC INSTABILITY; TENSILE
PROPERTIES; STRESS
AB Localized deformation mechanisms and strain-hardening behaviors in irradiated 316 and 316LN stainless steels were investigated, and a theoretical model was proposed to explain the linear strain-hardening behavior during the localized deformation. After low temperature irradiation to significant doses, the deformation microstructure changed from dislocation tangles to channels or mechanical twins. It was also observed that irradiation hardening straightened gliding dislocations and increased the tendency for forming pileups. Regardless of these microstructural changes, the strain-hardening behavior was relatively insensitive to the irradiation. This dose-independent strain-hardening rate resulted in dose independence of the true stress parameters, such as the plastic instability stress and true fracture stress. In the proposed model, the long-range back stress was formulated as a function of the number of pileup dislocations per slip band and the number of slip bands in a grain. The calculation results confirmed the experimental observation that strain-hardening rate was insensitive to the change in deformation mechanism because the long-range back stress hardening became as high as the hardening by tangled dislocations.
C1 [Byun, T. S.; Hashimoto, N.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Byun, TS (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
EM byunts@ornl.gov
NR 40
TC 1
Z9 1
U1 1
U2 9
PU AMERICAN SOCIETY TESTING AND MATERIALS
PI W CONSHOHOCKEN
PA 100 BARR HARBOR DRIVE, W CONSHOHOCKEN, PA 19428-2959 USA
SN 1040-1695
BN 978-0-8031-3421-8
J9 AM SOC TEST MATER
PY 2008
VL 1492
BP 121
EP 133
DI 10.1520/STP46568S
PG 13
WC Materials Science, Multidisciplinary; Materials Science,
Characterization & Testing; Physics, Applied
SC Materials Science; Physics
GA BIT65
UT WOS:000262627400009
ER
PT S
AU Heinisch, HL
Gao, F
Kurtz, RJ
AF Heinisch, H. L.
Gao, F.
Kurtz, R. J.
BE Lott, RG
Busby, JT
TI Modeling the Interaction of Helium with Dislocations and Grain
Boundaries in Alpha-iron
SO EFFECTS OF RADIATION ON MATERIALS: 23RD INTERNATIONAL SYMPOSIUM
SE American Society for Testing and Materials Special Technical
Publications
LA English
DT Proceedings Paper
CT 23rd International Symposium on Effects of Radiation on Materials
CY JUN 13-15, 2006
CL San Jose, CA
SP ASTM Int Comm E10 Nucl Technol & Applicat
DE iron; helium; molecular dynamics; dislocations; grain boundaries;
computer simulation
ID VACANCY CLUSTERS; FE; EMBRITTLEMENT; STEELS; ATOMS; HE
AB Helium is a ubiquitous impurity in nuclear materials that can have significant deleterious effects on mechanical properties, including deformation and fracture. To determine ways to mitigate the effects of helium it is necessary to understand the behavior of helium with respect to its interaction with various microstructural features. Toward that end, we have employed molecular statics, molecular dynamics, and the dimer method of potential surface mapping to study the fate of helium in the vicinity of dislocations and grain boundaries in alpha-iron. Even at very low temperatures interstitial helium atoms can migrate to dislocations and grain boundaries, where they are strongly bound. The binding energies of helium to these microstructural features relative to the perfect crystal and the migration energies of helium diffusing within them have a strong correlation to the excess atomic volume that exists in these extended defects. Helium atom migration energies within the dislocations and grain boundaries studied are in the range of 0.4-0.5 eV. Helium "kick out" mechanisms have been identified within dislocations and grain boundaries by which interstitial helium atoms replace an Fe lattice atom, creating a stable He-vacancy complex that may be a nucleation site for an He bubble.
C1 [Heinisch, H. L.; Gao, F.; Kurtz, R. J.] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Heinisch, HL (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA.
EM hl.heinisch@pnl.gov
RI Gao, Fei/H-3045-2012
NR 21
TC 2
Z9 2
U1 0
U2 19
PU AMERICAN SOCIETY TESTING AND MATERIALS
PI W CONSHOHOCKEN
PA 100 BARR HARBOR DRIVE, W CONSHOHOCKEN, PA 19428-2959 USA
SN 1040-1695
BN 978-0-8031-3421-8
J9 AM SOC TEST MATER
PY 2008
VL 1492
BP 190
EP 196
DI 10.1520/STP46573S
PG 7
WC Materials Science, Multidisciplinary; Materials Science,
Characterization & Testing; Physics, Applied
SC Materials Science; Physics
GA BIT65
UT WOS:000262627400014
ER
PT S
AU Gelles, DS
Brewer, LN
Kotula, PG
Cowgill, DF
Busick, CC
Snow, CS
AF Gelles, D. S.
Brewer, L. N.
Kotula, P. G.
Cowgill, D. F.
Busick, C. C.
Snow, C. S.
BE Lott, RG
Busby, JT
TI Microstructural Features in Aged Erbium Tritide Films
SO EFFECTS OF RADIATION ON MATERIALS: 23RD INTERNATIONAL SYMPOSIUM
SE American Society for Testing and Materials Special Technical
Publications
LA English
DT Proceedings Paper
CT 23rd International Symposium on Effects of Radiation on Materials
CY JUN 13-15, 2006
CL San Jose, CA
SP ASTM Int Comm E10 Nucl Technol & Applicat
DE tritium decay; helium bubbles; Erbium tritide; microstructure
ID HELIUM PLATELETS; NICKEL
AB Erbium is used as a storage medium for tritium. Microstructural study of helium bubble generation from tritium decay in erbium tritide can provide an unusual example of bubble development with negligible radiation damage. Aged erbium tritide film specimens were found to contain five distinctly different microstructural features. The general structure was of large columnar grains of ErT(2). But on a fine scale, precipitates believed to be erbium oxy-tritides and helium bubbles could be identified. The precipitate size was in the range of similar to 10 nm and the bubbles were of an unusual planar shape on {111} planes with an invariant thickness of similar to 1 nm and a diameter on the order of 10 nm. Also, an outer layer containing no fine precipitate structure and only a few helium bubbles were present on the films. This layer is best described as a denuded zone which probably grew during aging in air. Finally, large embedded Er(2)O(3) particles were found at low density and nonuniformly distributed, but sometimes extending through the thickness of the film. A failure mechanism allowing the helium to escape is suggested by observed cracking between bubbles closer to end of life.
C1 [Gelles, D. S.] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Gelles, DS (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA.
NR 12
TC 0
Z9 1
U1 1
U2 4
PU AMERICAN SOCIETY TESTING AND MATERIALS
PI W CONSHOHOCKEN
PA 100 BARR HARBOR DRIVE, W CONSHOHOCKEN, PA 19428-2959 USA
SN 1040-1695
BN 978-0-8031-3421-8
J9 AM SOC TEST MATER
PY 2008
VL 1492
BP 219
EP 225
DI 10.1520/STP46576S
PG 7
WC Materials Science, Multidisciplinary; Materials Science,
Characterization & Testing; Physics, Applied
SC Materials Science; Physics
GA BIT65
UT WOS:000262627400017
ER
PT S
AU Sumali, H
Allen, MS
AF Sumali, Hartono
Allen, Matthexv S.
BE Tomasini, EP
TI Apparent nonlinear effect of the microscope on the laser Doppler
vibrometer
SO EIGHTH INTERNATIONAL CONFERENCE ON VIBRATION MEASUREMENTS BY LASER
TECHNIQUES: ADVANCES AND APPLICATIONS
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT 8th International Conference on Vibration Measurements by Laser
Techniques
CY JUN 18-20, 2008
CL Ancona, ITALY
SP Italian Assoc Laser Velcimetry & Non Invas Diagnost, Univ Politecn Marche, Dipartimento Meccan
DE Velocimeter; vibration; harmonic distortion
AB One powerful method for measuring the motion of microelectromechanical systems (MEMS) relies on a Laser Doppler Vibrometer (LDV) focused through very an optical microscope. Recent data taken under a simple and common condition demonstrate that the velocity signal produced by the LDV with an optical microscope may be different from the velocity signal produced by the LDV without a microscope. This is especially important if one wishes to estimate acceleration by differentiating velocity. In this study, the time derivatives of LDV signals are compared against the signal from an accelerometer when the LDV is focused through an optical microscope and without the microscope system. The signal from the LDV without the microscope is almost identical to the accelerometer signal. In contrast. the signal from the LDV with the microscope exhibits a nonlinear relationship with the accelerometer signal. Both the LDV and the accelerometer were measuring a sinusoidal velocity generated by all electromechanical shaker. The Fourier transform of the acceleration from the LDV with the microscope shows a multitude of high harmonics of the excitation frequency, which have much higher amplitudes than the harmonics present in the accelerometer signal. Without the microscope, the LDV gives a much less distorted sinusoidal signal, even after time differentiation. The distortion of the signal from the LDV is periodic, with the same period as the sinusoidal drive signal. The largest distortion occurs near points of maximum negative acceleration, corresponding to the positive displacement peak of the sinusoidal oscillation. Because the measured oscillation is out of plane, pseudo-vibrations caused by speckle noise do not explain the distortion. Instead, the distortion appears to be caused by the optics of the microscope.
C1 [Sumali, Hartono] Sandia Natl Labs, Albuquerque, NM 87111 USA.
RP Sumali, H (reprint author), Sandia Natl Labs, MS 1070,POB 5800, Albuquerque, NM 87111 USA.
EM hsumali@sandia.gov
NR 8
TC 1
Z9 1
U1 0
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 978-0-8194-7326-4
J9 PROC SPIE
PY 2008
VL 7098
AR 709817
DI 10.1117/12.803165
PG 9
WC Instruments & Instrumentation; Optics; Physics, Applied
SC Instruments & Instrumentation; Optics; Physics
GA BIN12
UT WOS:000260992400040
ER
PT J
AU El-Refaie, AM
Jahns, TM
Mckeever, JW
AF El-Refaie, Ayman M.
Jahns, Thomas M.
Mckeever, John W.
TI Effect of back-emf constraints on fractional-slot surface PM machines
designed for wide constant-power speed range operation
SO ELECTRIC POWER COMPONENTS AND SYSTEMS
LA English
DT Article
DE back-emf; concentrated winding; flux weakening; fractional-slot; surface
permanent magnet synchronous machine; SPM
ID PERMANENT-MAGNET MACHINES; CONCENTRATED WINDINGS
AB This article investigates the tradeoffs that result from constraining the back-emf at maximum speed for fractional-slot surface permanent magnet (SPM) machines. Two 55 kW (peak) SPM machines designed to meet requirements established in the US FreedomCar program are used as the basis for this investigation. The two machines are 36-slot/30-pole SPM fractional-slot concentrated-winding designs that use sintered NdFeB magnets. The first design has no back-emf constraint at maximum speed, allowing it to exceed the 600 V pk l-l limit, while the second design has been designed to meet this requirement. Results of this study show that the introduction of back-emf limits can lead to significant increases in the SPM machine's rated current, with only a modest impact on the machines mass and volume. A combination of closed-form analysis and finite element analysis is used to carry out this investigation.
C1 [El-Refaie, Ayman M.] Elect Machines & Drive Lab, GE Global Res Ctr, Niskayuna, NY 12309 USA.
[Jahns, Thomas M.] Univ Wisconsin, Dept Elect & Comp Engn, Madison, WI 53706 USA.
[Mckeever, John W.] Oak Ridge Natl Lab, Natl Transportat Res Ctr, Knoxville, TN USA.
RP El-Refaie, AM (reprint author), Elect Machines & Drive Lab, GE Global Res Ctr, Niskayuna, NY 12309 USA.
EM elrefaie@research.ge.com
NR 13
TC 2
Z9 2
U1 0
U2 4
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 530 WALNUT STREET, STE 850, PHILADELPHIA, PA 19106 USA
SN 1532-5008
EI 1532-5016
J9 ELECTR POW COMPO SYS
JI Electr. Power Compon. Syst.
PY 2008
VL 36
IS 2
BP 124
EP 137
DI 10.1080/15325000701549012
PG 14
WC Engineering, Electrical & Electronic
SC Engineering
GA 250ZZ
UT WOS:000252341300002
ER
PT J
AU Abraham, DP
Spila, T
Furczon, MM
Sammann, E
AF Abraham, D. P.
Spila, T.
Furczon, M. M.
Sammann, E.
TI Evidence of Transition-Metal Accumulation on Aged Graphite Anodes by
SIMS
SO ELECTROCHEMICAL AND SOLID STATE LETTERS
LA English
DT Article
ID LITHIUM-ION CELLS; IMPEDANCE
AB In cells containing Li(1.05)(Ni(1/3)Co(1/3)Mn(1/3))(0.95)O(2)-based positive and graphite-based negative electrodes, a significant portion of cell impedance rise on aging is known to be from the negative electrode. One possible reason for this impedance rise is the dissolution of transition-metal elements from the oxide electrode that accumulate and create a high-impedance layer at the negative electrode electrolyte interface. This article details dynamic secondary ion mass spectrometry (SIMS) measurements, which provide a relative comparison of Mn, Co, and Ni contents on fresh, formed, and aged graphite electrodes. The data clearly indicate that these transition-metal elements accumulate at the electrode surface and diffuse into the electrode during cell aging. (C) 2008 The Electrochemical Society. [DOI: 10.1149/1.2987680] All rights reserved.
C1 [Abraham, D. P.; Furczon, M. M.] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA.
[Spila, T.; Sammann, E.] Univ Illinois, Frederick Seitz Mat Res Lab, Urbana, IL 61801 USA.
RP Abraham, DP (reprint author), Argonne Natl Lab, Chem Sci & Engn Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM abraham@anl.gov
FU U. S. Department of Energy [DEFG02-91ER45439]
FX We acknowledge the use of the Center for Microanalysis of Materials
(CMM) at the Frederick Seitz Materials Research Laboratory, which is
partially supported by the U. S. Department of Energy under grant
DEFG02-91ER45439. We acknowledge T. Duong and D. Howell at the U. S.
Department of Energy, Office of Vehicle Technologies, for supporting
this research. We are grateful for helpful discussions with G.
Henriksen, D. Dees, and S.-H. Kang at Argonne National Laboratory and
the assistance of S. Maclaren and R. Haasch at CMM.
NR 9
TC 29
Z9 29
U1 1
U2 18
PU ELECTROCHEMICAL SOC INC
PI PENNINGTON
PA 65 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA
SN 1099-0062
J9 ELECTROCHEM SOLID ST
JI Electrochem. Solid State Lett.
PY 2008
VL 11
IS 12
BP A226
EP A228
DI 10.1149/1.2987680
PG 3
WC Electrochemistry; Materials Science, Multidisciplinary
SC Electrochemistry; Materials Science
GA 359YW
UT WOS:000260025200004
ER
PT J
AU Chen, GY
Wilcox, JD
Richardson, TJ
AF Chen, Guoying
Wilcox, James D.
Richardson, Thomas J.
TI Improving the performance of lithium manganese phosphate through
divalent cation substitution
SO ELECTROCHEMICAL AND SOLID STATE LETTERS
LA English
DT Article
ID ELECTROCHEMICALLY ACTIVE LIMNPO4; HYDROTHERMAL SYNTHESIS; CATHODE
MATERIALS; ION BATTERIES; LIFEPO4; FE; MN
AB Highly crystalline samples of LiMnPO(4) and its analogs with partial substitution of Mn by divalent Mg, Cu, Zn, and Ni were prepared by hydrothermal synthesis and characterized by X-ray diffraction and infrared spectroscopy. Chemical oxidation produced two-phase mixtures of the initial phases LiMn((1-y))M(y)PO(4) and the delithiated forms, Li(y)Mn((1-y))M(y)PO(4), all with the olivine structure. The extent of oxidation depended upon the quantity of oxidizing agent used and on the identity of the substituent ions. Mg, Ni, and Cu were found to increase the level of delithiation relative to that in pure LiMnPO(4). Mg was also shown to reduce the tendency of the oxidized phase to absorb water. (C) 2008 The Electrochemical Society.
C1 [Chen, Guoying; Richardson, Thomas J.] Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA.
[Wilcox, James D.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Chen, GY (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA.
EM gchen@lbl.gov
FU Secretary for Energy Efficiency and Renewable Energy; Office of
FreedomCAR; Vehicle Technologies of the U. S. Department of Energy
[DE-AC02-05CH11231]
FX This work was supported by the Assistant Secretary for Energy Efficiency
and Renewable Energy, Office of FreedomCAR and Vehicle Technologies of
the U. S. Department of Energy under contract no. DE-AC02-05CH11231.
NR 25
TC 72
Z9 73
U1 0
U2 54
PU ELECTROCHEMICAL SOC INC
PI PENNINGTON
PA 65 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA
SN 1099-0062
J9 ELECTROCHEM SOLID ST
JI Electrochem. Solid State Lett.
PY 2008
VL 11
IS 11
BP A190
EP A194
DI 10.1149/1.2971169
PG 5
WC Electrochemistry; Materials Science, Multidisciplinary
SC Electrochemistry; Materials Science
GA 348CM
UT WOS:000259188600004
ER
PT J
AU Gabrisch, H
Wilcox, J
Doeff, MM
AF Gabrisch, H.
Wilcox, J.
Doeff, M. M.
TI TEM study of fracturing in spherical and plate-like LiFePO4 particles
SO ELECTROCHEMICAL AND SOLID STATE LETTERS
LA English
DT Article
ID POSITIVE-ELECTRODE; CARBON; SPECTROSCOPY; TRANSPORT; BATTERIES; CATHODE;
ENERGY
AB An investigation of fracturing in LiFepO(4) particles as a function of the particle morphology and history is presented. Two types of samples, one subjected to electrochemical cycling and another to chemical delithiation, are compared. We observe the formation of microfractures parallel to low indexed lattice planes in both samples. The fracture surfaces are predominantly parallel to (100) planes in the chemically delithiated powder and (100) and (010) planes in the electrochemically cycled powder. A consideration of the dislocations' stress fields shows that particle geometry plays an important role in the observed behavior. (c) 2008 The Electrochemical Society.
C1 [Gabrisch, H.] Univ New Orleans, Dept Chem, Adv Mat Res Inst, New Orleans, LA 70148 USA.
[Wilcox, J.; Doeff, M. M.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Sci Mat, Berkeley, CA 94720 USA.
RP Gabrisch, H (reprint author), Univ New Orleans, Dept Chem, Adv Mat Res Inst, New Orleans, LA 70148 USA.
EM hgabrisc@uno.edu
RI Doeff, Marca/G-6722-2013; Gabrisch, Heike/I-5021-2013
OI Doeff, Marca/0000-0002-2148-8047;
NR 24
TC 65
Z9 65
U1 2
U2 42
PU ELECTROCHEMICAL SOC INC
PI PENNINGTON
PA 65 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA
SN 1099-0062
EI 1944-8775
J9 ELECTROCHEM SOLID ST
JI Electrochem. Solid State Lett.
PY 2008
VL 11
IS 3
BP A25
EP A29
DI 10.1149/1.2826746
PG 5
WC Electrochemistry; Materials Science, Multidisciplinary
SC Electrochemistry; Materials Science
GA 262AQ
UT WOS:000253121800002
ER
PT J
AU Yang, ZG
Xia, GG
Nie, ZM
Templeton, J
Stevenson, JW
AF Yang, Zhenguo
Xia, Guanguang
Nie, Zimin
Templeton, Joshua
Stevenson, Jeffry W.
TI Ce-modified (Mn,Co)(3)O-4 spinel coatings on ferritic stainless steels
for SOFC interconnect applications
SO ELECTROCHEMICAL AND SOLID STATE LETTERS
LA English
DT Article
ID OXIDE FUEL-CELLS; OXIDATION-RESISTANT ALLOYS; PROTECTION LAYERS;
METALLIC INTERCONNECTS; SEALING GLASSES; CATHODE; SURFACE; DEGRADATION;
PERFORMANCE; ELECTRODES
AB This paper reports the development of a coating approach that simultaneously achieves the advantages of conductive (Mn,Co)(3)O-4 spinel coatings and of rare earth (RE) surface treatment on ferritic stainless steels for solid oxide fuel cell (SOFC) interconnect applications. This approach involves the modification of (Mn,Co)(3)O-4 spinel coatings through addition of a RE element to the spinel composition. In particular, Ce-modified spinel coatings (Ce0.05Mn1.475Co1.475O4) behaved similarly to unmodified Mn1.5Co1.5O4 spinel coatings by acting as a Cr-outward and O-inward diffusion barrier, thus improving the surface stability and electrical performance of ferritic stainless steel. In addition, the RE addition appeared to alter the scale growth behavior beneath the coating, so that alloy samples with the Ce-modified spinel coating exhibited a more adherent scale/metal interface compared to samples with the unmodified spinel coating. As a result, it is anticipated that compared to unmodified spinel coatings, the RE-modified coatings may lead to improved structural stability and electrical performance for ferritic stainless steel-based SOFC interconnects.
C1 [Yang, Zhenguo; Xia, Guanguang; Nie, Zimin; Templeton, Joshua; Stevenson, Jeffry W.] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Yang, ZG (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA.
EM zgary.yang@pnl.gov
NR 31
TC 39
Z9 42
U1 1
U2 27
PU ELECTROCHEMICAL SOC INC
PI PENNINGTON
PA 65 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA
SN 1099-0062
J9 ELECTROCHEM SOLID ST
JI Electrochem. Solid State Lett.
PY 2008
VL 11
IS 8
BP B140
EP B143
DI 10.1149/1.2929066
PG 4
WC Electrochemistry; Materials Science, Multidisciplinary
SC Electrochemistry; Materials Science
GA 312XQ
UT WOS:000256706100010
ER
PT J
AU Yu, ZQ
Kuchibhatla, SVNT
Saraf, LV
Marina, OA
Wang, CM
Engelhard, MH
Shutthanandan, V
Nachimuthu, P
Thevuthasan, S
AF Yu, Z. Q.
Kuchibhatla, Satyanarayana V. N. T.
Saraf, L. V.
Marina, O. A.
Wang, C. M.
Engelhard, M. H.
Shutthanandan, V.
Nachimuthu, P.
Thevuthasan, S.
TI Conductivity of oriented samaria-doped ceria thin films grown by
oxygen-plasma-assisted molecular beam epitaxy
SO ELECTROCHEMICAL AND SOLID STATE LETTERS
LA English
DT Article
ID DEPENDENT ELECTRICAL-CONDUCTIVITY; NANOCRYSTALLINE CERIA;
IONIC-CONDUCTIVITY; POLYCRYSTALLINE; MICROSTRUCTURE; ELECTROLYTE; OXIDES
AB We have used oxygen-plasma-assisted molecular beam epitaxy to grow highly oriented Ce1-xSmxO2-delta films on single-crystal c-Al2O3. The samarium concentration x was varied in the range of 1-33 atom %. It was observed that dominant (111) orientation in Ce1-xSmxO2-delta films can be maintained up to about 10 atom % samarium concentration. Films higher than 10 atom % Sm concentration started to show polycrystalline features. The highest conductivity of 0.04 S cm(-1) at 600 degrees C was observed for films with similar to 5 atom % Sm concentration. A loss of orientation, triggering an enhanced grain-boundary scattering, appears to be responsible for the decrease in conductivity at higher dopant concentrations. (c) 2008 The Electrochemical Society.
C1 [Yu, Z. Q.] Nanjing Normal Univ, Dept Chem, Nanjing 210097, Peoples R China.
[Kuchibhatla, Satyanarayana V. N. T.; Saraf, L. V.; Marina, O. A.; Wang, C. M.; Engelhard, M. H.; Shutthanandan, V.; Nachimuthu, P.; Thevuthasan, S.] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Kuchibhatla, Satyanarayana V. N. T.] Univ Cent Florida, Adv Mat Proc & Anal Ctr, Orlando, FL 32816 USA.
RP Yu, ZQ (reprint author), Nanjing Normal Univ, Dept Chem, Nanjing 210097, Peoples R China.
EM theva@pnl.gov
RI Engelhard, Mark/F-1317-2010;
OI Engelhard, Mark/0000-0002-5543-0812
NR 27
TC 10
Z9 10
U1 0
U2 10
PU ELECTROCHEMICAL SOC INC
PI PENNINGTON
PA 65 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA
SN 1099-0062
J9 ELECTROCHEM SOLID ST
JI Electrochem. Solid State Lett.
PY 2008
VL 11
IS 5
BP B76
EP B78
DI 10.1149/1.2890122
PG 3
WC Electrochemistry; Materials Science, Multidisciplinary
SC Electrochemistry; Materials Science
GA 274GM
UT WOS:000253989800012
ER
PT J
AU Zeng, Z
Natesan, K
Cai, SB
AF Zeng, Zuotao
Natesan, Ken
Cai, Steven B.
TI Characterization of oxide scale on alloy 446 by x-ray nanobeam analysis
SO ELECTROCHEMICAL AND SOLID STATE LETTERS
LA English
DT Article
ID INTERCONNECT EXPOSURE CONDITIONS; FERRITIC STAINLESS-STEELS; FUEL-CELL;
METALLIC INTERCONNECTS; OXIDATION BEHAVIOR; SOFC; TRANSPORT; CORROSION;
COATINGS; CR2O3
AB To understand the potential degradation of metallic interconnects, tubes of alloy 446 were exposed to air/hydrogen dual atmosphere at elevated temperatures for 1030 h. The scale developed on the air side consisted of two layers. Because the two sublayers in the oxide scale were too thin for evaluation by regular X-ray diffraction, nanobeam X-ray diffraction was used to study the phase compositions in the scales that formed on both the air and hydrogen sides of alloy 446. The results indicate that Mn1-xCr2-xO4 spinel is the major phase in the oxide scale on alloy 446. The valence of manganese in the oxide scale was also evaluated by X-ray near-edge absorption. (C) 2007 The Electrochemical Society.
C1 Argonne Natl Lab, Nucl Engn Div, Argonne, IL 60439 USA.
Illinois Math & Sci Acad, Aurora, IL 60506 USA.
RP Zeng, Z (reprint author), Argonne Natl Lab, Nucl Engn Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM zeng@anl.gov
NR 18
TC 1
Z9 1
U1 1
U2 7
PU ELECTROCHEMICAL SOC INC
PI PENNINGTON
PA 65 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA
SN 1099-0062
J9 ELECTROCHEM SOLID ST
JI Electrochem. Solid State Lett.
PY 2008
VL 11
IS 1
BP C5
EP C8
DI 10.1149/1.2804113
PG 4
WC Electrochemistry; Materials Science, Multidisciplinary
SC Electrochemistry; Materials Science
GA 231XW
UT WOS:000250983500008
ER
PT J
AU Roper, CS
Radmilovic, V
Howe, RT
Maboudian, R
AF Roper, Christopher S.
Radmilovic, Velimir
Howe, Roger T.
Maboudian, Roya
TI Effects of annealing on residual stress and strain gradient of doped
polycrystalline SiC thin films
SO ELECTROCHEMICAL AND SOLID STATE LETTERS
LA English
DT Article
ID CHEMICAL-VAPOR-DEPOSITION; 3C-SIC FILMS; PRESSURE; REACTOR; GROWTH;
LAYERS
AB We report the effects of annealing at 925 and 1050 degrees C in argon ambient on the resistivity, average residual stress, and strain gradient of highly doped polycrystalline 3C-SiC films deposited at 800 degrees C and 170 mTorr from 1,3-disilabutane, dichlorosilane, and ammonia. Residual stress shifts from -569 to 274 MPa, compressive strain gradient shifts from 4x10(-4) to -0.018 mu m(-1), and resistivity shifts from -0.037 to 0.030 Omega cm. Characterization of the SiC films reveals that oxygen impurity diffusion from the ambient during annealing and a change in bonding of nitrogen dopant atoms are sources of the shifts in these properties.
C1 [Roper, Christopher S.; Maboudian, Roya] Univ Calif Berkeley, Dept Chem Engn, Berkeley Sensor & Actuator Ctr, Berkeley, CA 94720 USA.
[Radmilovic, Velimir] Univ Calif Berkeley, Lawrence Berkeley Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA.
[Howe, Roger T.] Stanford Univ, Dept Elect Engn, Stanford, CA 94305 USA.
RP Roper, CS (reprint author), Univ Calif Berkeley, Dept Chem Engn, Berkeley Sensor & Actuator Ctr, Berkeley, CA 94720 USA.
EM maboudia@berkeley.edu
NR 17
TC 13
Z9 13
U1 0
U2 4
PU ELECTROCHEMICAL SOC INC
PI PENNINGTON
PA 65 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA
SN 1099-0062
J9 ELECTROCHEM SOLID ST
JI Electrochem. Solid State Lett.
PY 2008
VL 11
IS 4
BP D35
EP D37
DI 10.1149/1.2831906
PG 3
WC Electrochemistry; Materials Science, Multidisciplinary
SC Electrochemistry; Materials Science
GA 263SY
UT WOS:000253238000009
ER
PT J
AU Brosha, EL
Mukundan, R
Garzon, FH
AF Brosha, Eric L.
Mukundan, Rangachary
Garzon, Fernando H.
TI YSZ-Based Mixed Potential Sensors for the Detection of Explosives
SO ELECTROCHEMICAL AND SOLID STATE LETTERS
LA English
DT Article
ID STABILIZED ZIRCONIA; OXIDE ELECTRODES; SOILS; TNT
AB A zirconia-based mixed potential sensor utilizing dense lanthanum chromite and Pt electrodes and porous yttria-stabilized zirconia (YSZ) electrolyte was used in an alternating HC mode (unbiased) and total NO(x) mode (50 nA bias current) to detect the HC and NO(x) deflagration remnants of a nitroglycerin/nitrocellulose propellant (Bullseye), ammonium nitrate and fuel oil, blackpowder, and urea (a high nitrogen content fertilizer). Unique HC and NO(x) sensor responses taken together with sufficient sensitivity to detect microgram quantities of Bullseye, directly and via capture of trace residue by swiping contaminated surfaces, suggest that detection and discrimination of high explosives using mixed-potential sensors is possible. (C) 2008 The Electrochemical Society. [DOI: 10.1149/1.2988252] All rights reserved.
C1 [Brosha, Eric L.; Mukundan, Rangachary; Garzon, Fernando H.] Los Alamos Natl Lab, Sensors & Electrochem Devices Grp, Los Alamos, NM 87545 USA.
RP Brosha, EL (reprint author), Los Alamos Natl Lab, Sensors & Electrochem Devices Grp, POB 1663, Los Alamos, NM 87545 USA.
EM brosha@lanl.gov
OI Mukundan, Rangachary/0000-0002-5679-3930
FU LANL Royalty Funds
FX The authors acknowledge Dr. Kenneth Stroh for his discretionary use of
the LANL Royalty Funds to support this research. Other sources of LANL
mixed potential sensor research funding over the past 10 years include
the DOE: Freedom Car and Vehicle Technologies programs, DOE: Advanced
Reciprocating Engine Systems program, LANL: Technology Maturation Fund,
LANL Laboratory Directed Research and Development, and DOE: Hydrogen,
Fuel Cell and Infrastructure Technologies program.
NR 23
TC 12
Z9 12
U1 1
U2 8
PU ELECTROCHEMICAL SOC INC
PI PENNINGTON
PA 65 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA
SN 1099-0062
J9 ELECTROCHEM SOLID ST
JI Electrochem. Solid State Lett.
PY 2008
VL 11
IS 12
BP J92
EP J95
DI 10.1149/1.2988252
PG 4
WC Electrochemistry; Materials Science, Multidisciplinary
SC Electrochemistry; Materials Science
GA 359YW
UT WOS:000260025200021
ER
PT J
AU Liu, GD
Wang, J
Lin, YH
Wang, J
AF Liu, Guodong
Wang, Jun
Lin, Yuehe
Wang, Joseph
BE Zhang, X
Ju, H
Wang, J
TI Nanoparticle-based biosensors and bioassays
SO ELECTROCHEMICAL SENSORS, BIOSENSORS AND THEIR BIOMEDICAL APPLICATIONS
LA English
DT Article; Book Chapter
ID ELECTROCHEMICAL STRIPPING DETECTION; PROSTATE-SPECIFIC ANTIGEN;
DNA-HYBRIDIZATION; BIOCONJUGATED NANOPARTICLES; POTENTIOMETRIC
DETECTION; GOLD NANOPARTICLES; IMMUNOASSAY; LABEL; ELECTRODE; PROTEINS
C1 [Liu, Guodong; Wang, Jun; Lin, Yuehe] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Wang, Joseph] Arizona State Univ, Dept Chem & Mat Engn, Ctr Bioelect & Biosensors, Biodesign Inst, Tempe, AZ 85387 USA.
[Wang, Joseph] Arizona State Univ, Dept Biochem, Ctr Bioelect & Biosensors, Biodesign Inst, Tempe, AZ 85387 USA.
RP Liu, GD (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA.
RI Lin, Yuehe/D-9762-2011
OI Lin, Yuehe/0000-0003-3791-7587
NR 62
TC 3
Z9 3
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
BN 978-0-08-055489-1
PY 2008
BP 441
EP 457
DI 10.1016/B978-012373738-0.50016-7
PG 17
WC Electrochemistry; Engineering, Biomedical; Engineering, Electrical &
Electronic
SC Electrochemistry; Engineering
GA BCR07
UT WOS:000311052700015
ER
PT J
AU Abraham, DP
Kawauchi, S
Dees, DW
AF Abraham, D. P.
Kawauchi, S.
Dees, D. W.
TI Modeling the impedance versus voltage characteristics of
LiNi0.8Co0.15Al0.05O2
SO ELECTROCHIMICA ACTA
LA English
DT Article
DE lithium ion; LiNi0.8Co0.15Al0.05O2; state of charge; impedance model;
high power
ID LITHIUM-ION CELLS; HIGH-POWER; DIFFERENT TEMPERATURES; INTERCALATION;
SPECTROSCOPY; ELECTRODES; BATTERIES
AB The power-delivery capability of lithium-ion cells based oil LiNi0.8Co0.15Al0.05O2-based positive electrodes shows a significant dependence oil the cell's state-of-charge. One reason for this behavior is the variation of the positive electrode's impedance with the oxide's lithium content. In this article, in electrochemical model based oil concentrated solution porous electrode theory is used to model impedance data obtained oil LiNi0.8Co0.15Al0.05O2-based positive electrodes charged to potentials ranging from 3.55 to 4.55 V Versus Li. The parameters obtained from model fits include the exchange-current density and Li-ion diffusion coefficients in the oxide. The variations in these parameters with oxide potential are correlated with structural changes in the material observed during Li-ion intercalation-deintercalation reactions. (C) 2007 Elsevier Ltd. All rights reserved.
C1 [Abraham, D. P.; Kawauchi, S.; Dees, D. W.] Argonne Natl Lab, Div Chem Engn, Argonne, IL 60439 USA.
RP Dees, DW (reprint author), Argonne Natl Lab, Div Chem Engn, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM dees@cmt.anl.gov
NR 26
TC 39
Z9 39
U1 3
U2 64
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0013-4686
J9 ELECTROCHIM ACTA
JI Electrochim. Acta
PD JAN 1
PY 2008
VL 53
IS 5
BP 2121
EP 2129
DI 10.1016/j.electacta.2007.09.018
PG 9
WC Electrochemistry
SC Electrochemistry
GA 255VL
UT WOS:000252685900006
ER
PT J
AU Roeper, DF
Chidambaram, D
Clayton, CR
Halada, GP
AF Roeper, Donald F.
Chidambaram, Devicharan
Clayton, Clive R.
Halada, Gary P.
TI Development of an environmentally friendly protective coating for the
depleted uranium-0.75 wt.% titanium alloy - Part V. Electrochemical
impedance spectroscopy of the coating
SO ELECTROCHIMICA ACTA
LA English
DT Article
DE uranium alloys; corrosion; molybdenum oxides; electrochemical impedance
spectroscopy; coatings
ID CHROMATE CONVERSION COATINGS; COATED METALS; AC-IMPEDANCE; BEHAVIOR;
ALUMINUM; CONDUCTIVITY; CORROSION; FILMS; MODEL; IRON
AB Molybdenum oxide based conversion coatings have been formed on the surface of the depleted uranium-0.75 wt.% titanium alloy. Electrochemical impedance spectroscopy (EIS) measurements have been performed on the as-made and aged coatings and compared with the untreated depleted uranium (DU) alloy. The Nyquist and Bode plots of the as-made coating were similar to the untreated samples and contained capacitive and inductive loops. The aged coating exhibits significantly different behavior from the as-made coating and has been modeled with a four element equivalent circuit that contains a constant phase element (CPE). (C) 2007 Elsevier Ltd. All rights reserved.
C1 [Roeper, Donald F.; Clayton, Clive R.; Halada, Gary P.] SUNY Stony Brook, Dept Mat Sci & Engn, Stony Brook, NY 11794 USA.
[Chidambaram, Devicharan] Brookhaven Natl Lab, Dept Environm Sci, Upton, NY 11973 USA.
RP Roeper, DF (reprint author), Naval Res Lab Code 6130, Washington, DC 20375 USA.
EM donald.roeper@nrl.navy.mil
RI Chidambaram, Dev/B-2967-2008
NR 29
TC 17
Z9 17
U1 1
U2 14
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0013-4686
J9 ELECTROCHIM ACTA
JI Electrochim. Acta
PD JAN 1
PY 2008
VL 53
IS 5
BP 2130
EP 2134
DI 10.1016/j.electacta.2007.09.021
PG 5
WC Electrochemistry
SC Electrochemistry
GA 255VL
UT WOS:000252685900007
ER
PT S
AU Pantelides, ST
Pennycook, SJ
AF Pantelides, Sokrates T.
Pennycook, Stephen J.
BE Avilov, AS
Dudarev, SL
Marks, LD
TI Materials physics using a combination of density-functional theory and
atomic-resolution electron microscopy
SO ELECTRON MICROSCOPY AND MULTISCALE MODELING, PROCEEDINGS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Conference on Electron Microscopy and Multiscale Modeling
CY SEP 03-07, 2007
CL Moscow, RUSSIA
SP RAS, Shubnikov Inst Crystallog, RAS, Sci Council Electron Microscopy, Int Union Crystallog, Commiss Electron Diffact
DE electron microscopy; density functional theory; electron energy loss
spectroscopy; complex materials
ID GRAIN-BOUNDARIES; GAMMA-ALUMINA
AB Scanning transmission electron microscopes provide atomic-resolution images and electron-energy loss spectra of crystalline systems. Density functional theory is a "theoretical microscope" that provides energetically preferred structures and excitation spectra. This paper gives a summary of several applications that demonstrate the breadth and depth of new results that can be obtained from a synergistic application of the experimental and theoretical methods to a wide range of complex materials systems.
C1 [Pantelides, Sokrates T.] Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA.
[Pantelides, Sokrates T.; Pennycook, Stephen J.] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
RP Pantelides, ST (reprint author), Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA.
NR 12
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0519-6
J9 AIP CONF PROC
PY 2008
VL 999
BP 12
EP +
PG 3
WC Crystallography; Materials Science, Multidisciplinary
SC Crystallography; Materials Science
GA BHP64
UT WOS:000255186100002
ER
PT S
AU Allen, LJ
D'Alfonso, AJ
Findlay, SD
Oxley, MP
Bosman, M
Keast, VJ
Cosgriff, EC
Behan, G
Nellist, PD
Kirkland, AI
AF Allen, L. J.
D'Alfonso, A. J.
Findlay, S. D.
Oxley, M. P.
Bosman, M.
Keast, V. J.
Cosgriff, E. C.
Behan, G.
Nellist, P. D.
Kirkland, A. I.
BE Avilov, AS
Dudarev, SL
Marks, LD
TI Theoretical interpretation of electron energy-loss spectroscopic images
SO ELECTRON MICROSCOPY AND MULTISCALE MODELING, PROCEEDINGS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Conference on Electron Microscopy and Multiscale Modeling
CY SEP 03-07, 2007
CL Moscow, RUSSIA
SP RAS, Shubnikov Inst Crystallog, RAS, Sci Council Electron Microscopy, Int Union Crystallog, Commiss Electron Diffact
DE core-loss spectroscopy; STEM; nonlocality
ID CORE-LOSS SPECTROSCOPY; INELASTICALLY SCATTERED ELECTRONS; SHELL
IONIZATION; Z-CONTRAST; MICROSCOPY; STEM; ATOMS; DIFFRACTION;
ABSORPTION; CRYSTALS
AB We discuss the theory of electron energy-loss spectroscopic images in scanning transmission electron microscopy. Three case studies are presented which have as common themes issues of inelastic scattering, coherence and image interpretation. The first is a state-by-state inelastic transitions analysis of a spectroscopic image which does not admit direct visual interpretation. The second compares theory and experiment for two-dimensional mapping. The third considers imaging in three dimensions via depth sectioning.
C1 [Allen, L. J.; D'Alfonso, A. J.; Findlay, S. D.] Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia.
[Oxley, M. P.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[Bosman, M.] Univ Sydney, Electron Microscope Unit, Sydney, NSW 2006, Australia.
[Keast, V. J.] Univ Newcastle, Sch Math & Phys Sci, Callaghan, NSW 2308, Australia.
[Cosgriff, E. C.; Behan, G.; Nellist, P. D.; Kirkland, A. I.] Univ Oxford, Dept Mat, Oxford OX1 3PH, England.
RP Allen, LJ (reprint author), Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia.
RI Behan, Gavin/C-6707-2008; Findlay, Scott/C-9764-2013
OI Findlay, Scott/0000-0003-4862-4827
FU Australian Research Council; Office of Basic Energy Sciences, Division
of Materials Sciences and Engineering; U.S. Department of Energy
[DEAC05- 00OR22725]; University of Oxford; JEOL Ltd; EPSRC; ORNL
Laboratory Directed Research; UT-Battelle; LLC
FX L. J. Allen and V. J. Keast acknowledge support by the Australian
Research Council. A. L. Bleloch and M. H. Gass are kindly thanked for
their assistance at the Daresbury Super-STEM and M. Watanabe for
providing the PCA code. This research was sponsored by the Office of
Basic Energy Sciences, Division of Materials Sciences and
Engineering,U.S. Department of Energy, under Contract No. DEAC05-
00OR22725 with Oak Ridge National Laboratory, managed and operated by
UT-Battelle, LLC; and by the ORNL Laboratory Directed Research and
Development Program. A. I. Kirkland and R D. Nellist acknowledge funding
from The University of Oxford, JEOL Ltd and the EPSRC.
NR 43
TC 2
Z9 2
U1 0
U2 4
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0519-6
J9 AIP CONF PROC
PY 2008
VL 999
BP 32
EP +
PG 3
WC Crystallography; Materials Science, Multidisciplinary
SC Crystallography; Materials Science
GA BHP64
UT WOS:000255186100004
ER
PT S
AU Rydh, A
Tagliati, S
Nilsson, RA
Xie, R
Pearson, JE
Welp, U
Kwok, WK
Divan, R
AF Rydh, A.
Tagliati, S.
Nilsson, R. A.
Xie, R.
Pearson, J. E.
Welp, U.
Kwok, W. -K.
Divan, R.
BE Bonca, J
Kruchinin, S
TI EMERGING MEASUREMENT TECHNIQUES FOR STUDIES OF MESOSCOPIC
SUPERCONDUCTORS
SO ELECTRON TRANSPORT IN NANOSYSTEMS
SE NATO Science for Peace and Security Series B-Physics and Biophysics
LA English
DT Proceedings Paper
CT NATO Advanced Research Workshop on Electron Transport in Nanosystems
CY SEP 17-21, 2007
CL Yalta, UKRAINE
SP NATO
DE superconductivity; calorimetry; mesoscopic; Si3N4 membrane; measurement
techniques; lock-in; FPGA; DAQ; ADC
ID TRANSITIONS; RESOLUTION; DISKS
AB Experimental research on mesoscopic systems puts high demands on the measurement infrastructure, including measurement system with associated sample preparation, experimental design, measurement electronics, and data collection. Successful experiments require both the ability to manufacture small samples and to successfully and accurately study their novel properties. Here, we discuss some aspects and recent advancements of general measurement techniques that should benefit several characterization methods such as thermodynamic, magnetic, and transport studies of mesoscopic superconductors.
C1 [Rydh, A.; Tagliati, S.; Nilsson, R. A.] AlbaNova Univ Ctr, Stockholm Univ, Dept Phys, SE-10691 Stockholm, Sweden.
[Xie, R.; Pearson, J. E.; Welp, U.; Kwok, W. -K.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
[Divan, R.] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
RP Rydh, A (reprint author), AlbaNova Univ Ctr, Stockholm Univ, Dept Phys, SE-10691 Stockholm, Sweden.
EM arydh@physto.se
RI Rydh, Andreas/A-7068-2012
OI Rydh, Andreas/0000-0001-6641-4861
FU Swedish Research Council [DE-AC02-06CH11357]; US Department of Energy,
Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
FX Support from the Swedish Research Council and the US Department of
Energy, Office of Science, Office of Basic Energy Sciences, under
contract No. DE-AC02-06CH11357 is gratefully acknowledged.
NR 17
TC 1
Z9 1
U1 0
U2 0
PU SPRINGER
PI DORDRECHT
PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS
SN 1871-465X
BN 978-1-4020-9144-5
J9 NATO SCI PEACE SEC B
PY 2008
BP 117
EP +
PG 3
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Physics, Condensed Matter
SC Engineering; Science & Technology - Other Topics; Physics
GA BIP20
UT WOS:000261513200010
ER
PT S
AU Movshovich, R
Tokiwa, Y
Ronning, F
Bianchi, A
Capan, C
Young, BL
Urbano, RR
Curro, NJ
Park, T
Thompson, JD
Bauer, E
Sarrao, JL
AF Movshovich, R.
Tokiwa, Y.
Ronning, F.
Bianchi, A.
Capan, C.
Young, B. L.
Urbano, R. R.
Curro, N. J.
Park, T.
Thompson, J. D.
Bauer, E.
Sarrao, J. L.
BE Bonca, J
Kruchinin, S
TI INTERPLAY OF MAGNETISM AND SUPERCONDUCTIVITY IN CeCoIn(5)
SO ELECTRON TRANSPORT IN NANOSYSTEMS
SE NATO Science for Peace and Security Series B - Physics and Biophysics
LA English
DT Proceedings Paper
CT NATO Advanced Research Workshop on Electron Transport in Nanosystems
CY SEP 17-21, 2007
CL Yalta, UKRAINE
SP NATO
DE heavy fermion; superconductivity; FFLO phase
ID CERHIN5; STATE; PRESSURE
AB CeCoIn(5) is a heavy fermion superconductor which appears to be straddling the boundary between the superconducting and magnetic ground states. At the Superconducting critical field H(c2) this material displays NFL behavior in transport and thermodynamic properties, pointing at a Quantum Critical Point (QCP) at H(c2), and hinting at the presence of magnetic fluctuations, probably due to an AFM order superseded by the superconductivity. In the High-Field-Low-Temperature (HFLT) corner of the superconducting phase of CeCoIn(5), within 20% off H(c2), an additional phase appears within the superconducting phase, and the normal-to-superconducting transition itself becomes first order. This behavior is consistent with a strong Pauli limited superconductivity, and tire low temperature high field phase being an inhomogeneous superconducting FFLO phase. Recent NMR experiments, however, point to a long range magnetic order within HFLT state. Experiments on CeRhIn(5) under pressure show magnetic field induced AFM order within the superconducting phase, with some similarities to the phase diagram of CeCOIn(5). Could the HFLT phase transition be due to magnetic order? Importantly, the HFLT phase does riot extend into the normal state above H(c2). We need a picture of a magnetism "attracted" to superconductivity to explain the data on the HFLT phase in CeCoIn(5).
C1 [Movshovich, R.; Tokiwa, Y.; Ronning, F.; Bianchi, A.; Capan, C.; Young, B. L.; Urbano, R. R.; Curro, N. J.; Park, T.; Thompson, J. D.; Bauer, E.; Sarrao, J. L.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Movshovich, R (reprint author), Los Alamos Natl Lab, MS K764, Los Alamos, NM 87545 USA.
EM roman@lanl.gov
RI Urbano, Ricardo/F-5017-2012; Curro, Nicholas/D-3413-2009; Bianchi,
Andrea/E-9779-2010
OI Curro, Nicholas/0000-0001-7829-0237; Bianchi, Andrea/0000-0001-9340-6971
NR 27
TC 0
Z9 0
U1 1
U2 1
PU SPRINGER
PI DORDRECHT
PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS
SN 1871-465X
BN 978-1-4020-9144-5
J9 NATO SCIENCE PEACE S
PY 2008
BP 127
EP 138
PG 12
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Physics, Condensed Matter
SC Engineering; Science & Technology - Other Topics; Physics
GA BIP20
UT WOS:000261513200011
ER
PT S
AU Treacy, MMJ
Kurnar, D
Rougee, A
Zhao, G
Buseck, PR
McNulty, I
Fan, L
Rau, C
Gibson, JM
AF Treacy, M. M. J.
Kurnar, D.
Rougee, A.
Zhao, G.
Buseck, P. R.
McNulty, I.
Fan, L.
Rau, C.
Gibson, J. M.
BE Baker, RT
Mobus, G
Brown, PD
TI Glimpsing order within the disarray
SO EMAG: ELECTRON MICROSCOPY AND ANALYSIS GROUP CONFERENCE 2007
SE Journal of Physics Conference Series
LA English
DT Proceedings Paper
CT Electron Microscopy and Analysis Group Conference
CY SEP 03-07, 2007
CL Glasgow Caledonian Univ, Glasgow, SCOTLAND
SP Univ Glasgow
HO Glasgow Caledonian Univ
ID MEDIUM-RANGE ORDER; FLUCTUATION MICROSCOPY; AMORPHOUS-SILICON; METALLIC
GLASSES; CARBON-FILMS
AB We describe some of the recent advances in the fluctuation microscopy technique for probing medium-range structural correlations in disordered materials. In particular we show that fluctuation microscopy is a surprisingly sensitive method for detecting trace quantities of C-60 in a disordered graphite matrix. This surprising sensitivity arises because C-60 does not have the same forbidden reflections as graphite. Modeling shows that the method should readily distinguish between C-60, C-70 and C-72. This result indicates that the technique can be used to discern dilute distributions of macromolecules in an otherwise disordered matrix.
We also describe preliminary interferometric fluctuation microscopy studies using cross-correlations in diffraction between coherent double probes. This is a form of holography where the diffraction patterns from two neighboring regions are allowed to overlap and interfere. Young's fringes appear wherever both regions scatter strongly. The cross-correlation can be examined as a function of probe separation to estimate a structure correlation length. At present, the method is being applied to x-ray and optical microscopies, but could also be applied to TEM. Since it isolates the essential four-body terms underpinning the fluctuation microscopy technique, this method holds much promise for studying medium-range order.
C1 [Treacy, M. M. J.; Kurnar, D.; Rougee, A.] Arizona State Univ, Dept Phys, Tempe, AZ 85287 USA.
[Zhao, G.; Buseck, P. R.] Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ 85287 USA.
[Buseck, P. R.] Arizona State Univ, Dept Chem Biochem, Tempe, AZ 85287 USA.
[McNulty, I.; Fan, L.; Rau, C.; Gibson, J. M.] Argonne Natl Lab, Argonne, IL 60439 USA.
RP Treacy, MMJ (reprint author), Arizona State Univ, Dept Phys, Tempe, AZ 85287 USA.
EM treacy@asu.edu
NR 20
TC 0
Z9 0
U1 0
U2 2
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 1742-6588
J9 J PHYS CONF SER
PY 2008
VL 126
AR 012001
DI 10.1088/1742-6596/126/1/012001
PG 8
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Physics, Applied
SC Science & Technology - Other Topics; Materials Science; Physics
GA BIX01
UT WOS:000263476400001
ER
PT S
AU Torczynski, JR
Gallis, MA
Rader, DJ
AF Torczynski, John R.
Gallis, Michael A.
Rader, Daniel J.
BE Schellenberg, FM
TI Particle-contamination analysis for reticles in carrier inner pods -
art. no. 69213G
SO EMERGING LITHOGRAPHIC TECHNOLOGIES XII, PTS 1 AND 2
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
(SPIE)
LA English
DT Proceedings Paper
CT Conference on Emerging Lithographic Technologies XII
CY FEB 26-28, 2008
CL San Jose, CA
SP SPIE
DE particle; contamination; reticle; carrier; inner pod; atmospheric
pressure; advection; diffusion; modeling
AB Particle contamination is analyzed for a reticle in the inner pod of a carrier with particular emphasis on the effect of raising the cover of the inner pod before removing the reticle from the carrier at atmospheric pressure (not low pressure). Two mechanisms for particle transport into the gap between the base plate and the reticle are considered: injection and advection-diffasion. It is shown that injection is not an important mechanism but that advection-diffusion transport can carry particles deeply into the gap, where they can deposit on the reticle surface. Closed-form expressions are presented for the transmission probability that particles at the reticle edge are transported inward past the exclusion zone around the reticle perimeter. The gas flow in the gap that occurs during cover-raising is found by numerical simulation, and the closed-form expressions are applied to determine the probability of contamination for different cover-raising scenarios.
C1 [Torczynski, John R.; Gallis, Michael A.; Rader, Daniel J.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Torczynski, JR (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
NR 12
TC 2
Z9 2
U1 0
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 978-0-8194-7106-2
J9 P SOC PHOTO-OPT INS
PY 2008
VL 6921
BP G9213
EP G9213
DI 10.1117/12.768409
PN 1-2
PG 11
WC Optics; Imaging Science & Photographic Technology; Physics, Condensed
Matter
SC Optics; Imaging Science & Photographic Technology; Physics
GA BHV89
UT WOS:000256898400101
ER
PT S
AU Goldberg, KA
Rekawa, SB
Kemp, CD
Barty, A
Anderson, E
Kearney, P
Han, H
AF Goldberg, Kenneth A.
Rekawa, Senajith B.
Kemp, Charles D.
Barty, Anton
Anderson, Erik
Kearney, Patrick
Han, Hakseung
BE Schellenberg, FM
TI EUV mask ireflectivity measurements with micron-scale spatial resolution
- art. no. 69213U
SO EMERGING LITHOGRAPHIC TECHNOLOGIES XII, PTS 1 AND 2
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
(SPIE)
LA English
DT Proceedings Paper
CT Conference on Emerging Lithographic Technologies XII
CY FEB 26-28, 2008
CL San Jose, CA
SP SPIE
DE extreme ultraviolet lithography; EUV; mask inspection; reticle; defect
repair; actinic inspection; bright-field; dark-field
ID EXTREME-ULTRAVIOLET LITHOGRAPHY; MULTILAYER DEFECTS; INSPECTION
AB The effort to produce defect-free mask blanks for EUV lithography relies on increasing the detection sensitivity of advanced mask inspection tools, operating at several wavelengths. We describe the unique measurement capabilities of a prototype actinic (EUV wavelength) microscope that is capable of detecting small defects and reflectivity changes that occur on the scale of microns to nanometers. The defects present in EUV masks can appear in many well-known forms: as particles that cause amplitude or phase variations in the reflected field; as surface contamination that reduces reflectivity and contrast; and as damage from inspection and use that reduces the reflectivity of the multilayer coating. This paper presents an overview of several topics where scanning actinic inspection makes a unique contribution to EUVL research. We describe the role of actinic scanning inspection in defect repair studies, observations of laser damage, actinic inspection following scanning electron microscopy, and the detection of both native and programmed defects.
C1 [Goldberg, Kenneth A.; Rekawa, Senajith B.; Kemp, Charles D.; Anderson, Erik] Ctr Xray Opt, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP Goldberg, KA (reprint author), Ctr Xray Opt, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
NR 14
TC 4
Z9 4
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 978-0-8194-7106-2
J9 P SOC PHOTO-OPT INS
PY 2008
VL 6921
BP U9213
EP U9213
DI 10.1117/12.772971
PN 1-2
PG 9
WC Optics; Imaging Science & Photographic Technology; Physics, Condensed
Matter
SC Optics; Imaging Science & Photographic Technology; Physics
GA BHV89
UT WOS:000256898400115
ER
PT S
AU Naulleau, PP
Anderson, CN
Chiu, J
Dean, K
Denham, P
Goldberg, KA
Hoef, B
Huh, S
Jones, G
La Fontaine, B
Ma, A
Niakoula, D
Park, JO
Wallow, T
AF Naulleau, Patrick P.
Anderson, Christopher N.
Chiu, Jerrin
Dean, Kim
Denham, Paul
Goldberg, Kenneth A.
Hoef, Brian
Huh, Sungmin
Jones, Gideon
La Fontaine, Bruno
Ma, Andy
Niakoula, Dimitra
Park, Joo-on
Wallow, Tom
BE Schellenberg, FM
TI Advanced extreme ultraviolet resist testing using the SEMATECH Berkeley
0.3-NA microfield exposure tool
SO EMERGING LITHOGRAPHIC TECHNOLOGIES XII, PTS 1 AND 2
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Emerging Lithographic Technologies XII
CY FEB 26-28, 2008
CL San Jose, CA
SP SPIE
DE extreme ultraviolet; lithography; photoresist; aberrations
ID LINE-EDGE ROUGHNESS; LITHOGRAPHIC CHARACTERIZATION; MASK-ROUGHNESS;
ALIGNMENT; ILLUMINATOR
AB Microfield exposure tools (METs) continue to play a dominant role in the development of extreme ultraviolet (EUV) resists. Here we present an update on the SEMATECH Berkeley 0.3-NA MET and summarize the latest test results from high-resolution line-space and contact-hole printing. In practice, the resolution limit of contact-hole printing is generally dominated by contact size variation that is often speculated to originate form shot noise effects. Such observations of photon-noise limited performance are concerning because they suggest that future increased resist sensitivity would not be feasible. Recent printing data, however, indicates that the contact size variation problem is currently not a result of shot noise but rather attributable to the mask in combination with the resist-dominated mask error enhancement factor (MEEF). Also discussed is the importance of the contribution of the system-level line-edge roughness (LER) to resist LER values currently obtained with the SEMATECH Berkeley MET. We present the expected magnitude of such effects and compare the results to observed trends in LER performance from EUV resists over the past few years.
C1 [Naulleau, Patrick P.; Chiu, Jerrin; Denham, Paul; Goldberg, Kenneth A.; Hoef, Brian; Jones, Gideon; Niakoula, Dimitra] Ctr Xray Opt, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP Naulleau, PP (reprint author), Ctr Xray Opt, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RI Anderson, Christopher/H-9526-2015
OI Anderson, Christopher/0000-0002-2710-733X
NR 23
TC 3
Z9 3
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 978-0-8194-7106-2
J9 PROC SPIE
PY 2008
VL 6921
AR 69213N
DI 10.1117/12.773833
PN 1-2
PG 11
WC Optics; Imaging Science & Photographic Technology; Physics, Condensed
Matter
SC Optics; Imaging Science & Photographic Technology; Physics
GA BHV89
UT WOS:000256898400108
ER
PT S
AU Bhaduri, D
Shukla, SK
Quinn, H
Graham, P
Gokhale, M
AF Bhaduri, D.
Shukla, S. K.
Quinn, H.
Graham, P.
Gokhale, M.
BE Tehranipoor, M
TI Design and Analysis of Fault-Tolerant Molecular Computing Systems
SO EMERGING NANOTECHNOLOGIES: TEST, DEFECT TOLERANCE, AND RELIABILITY
SE Frontiers in Electronic Testing
LA English
DT Article; Book Chapter
ID ELECTRONICS
C1 [Bhaduri, D.; Shukla, S. K.] Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA.
[Quinn, H.; Graham, P.; Gokhale, M.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Bhaduri, D (reprint author), Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA.
EM dbhaduri@vt.edu; shukla@vt.edu
NR 27
TC 0
Z9 0
U1 0
U2 0
PU SPRINGER
PI DORDRECHT
PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS
SN 0929-1296
BN 978-0-387-74746-0
J9 FRONT ELECTRON TEST
PY 2008
VL 37
BP 373
EP 397
D2 10.1007/978-0-387-74747-7
PG 25
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Instruments & Instrumentation
SC Engineering; Science & Technology - Other Topics; Instruments &
Instrumentation
GA BJU82
UT WOS:000267217000018
ER
PT B
AU Dudenhoeffer, D
Manic, M
AF Dudenhoeffer, Donald
Manic, Milos
BE Bruzzone, A
Longo, F
Piera, MA
Aguilar, RM
Frydman, C
TI FUZZY SIMULATION FOR INFRASTRUCTURE EFFECTS UNCERTAINTY ANALYSIS
SO EMSS 2008: 20TH EUROPEAN MODELING AND SIMULATION SYMPOSIUM
LA English
DT Proceedings Paper
CT 20th European Modeling and Simulation Symposium
CY SEP 17-19, 2008
CL Amantea, ITALY
SP Univ Calabria, Mech Dept, MSC-LES Modelin and Simulat Ctr, Lab Enterprise Solut, Univ Genoa, DIPTEM, Liophant Simulat, IEEE, Soc Comp Simulat Int, McLeod Inst Simula Sci, Modeling & Simulat Network, Int Mediterranean and Latin Amer Council Simulat, Auton Univ Barcelona, Univ La Laguna, Management & Adv Solut & Technol, Tonno Callipo, Liquiriszie Amarelli, Giulio Barca Prodotti Pelle
DE fuzzy simulation; critical infrastructure; decision support system;
interdependency modeling
AB In this paper we propose a method for conducting infrastructure effects-based modeling in uncertain environments. Critical infrastructure is composed of intertwining physical and social networks. Events in one network often cascade to other networks creating a domino effect. This cascading effect is not always well understood due to uncertainties in the multiple levels of effect. To account for these uncertainties, we present a method using fuzzy finite state machines (FFSM).
C1 [Dudenhoeffer, Donald] Idaho Natl Lab, Idaho Falls, ID 83415 USA.
RP Dudenhoeffer, D (reprint author), Idaho Natl Lab, Idaho Falls, ID 83415 USA.
EM Donald.dudenhoeffer@inl.gov; misko@uidaho.edu
NR 12
TC 0
Z9 0
U1 0
U2 0
PU DIPTIM-UNIV GENOA
BN 978-88-903724-0-7
PY 2008
BP 267
EP 273
PG 7
WC Computer Science, Artificial Intelligence; Computer Science,
Interdisciplinary Applications; Computer Science, Theory & Methods;
Engineering, Multidisciplinary; Operations Research & Management Science
SC Computer Science; Engineering; Operations Research & Management Science
GA BNT88
UT WOS:000275530400041
ER
PT S
AU Kerarne, SA
Cruz-Cabrera, AA
Peters, DW
Ellis, AR
Briggs, RD
Carter, TR
Samora, S
AF Kerarne, S. A.
Cruz-Cabrera, A. A.
Peters, D. W.
Ellis, A. R.
Briggs, R. D.
Carter, T. R.
Samora, S.
BE Hayduk, MJ
Delfyett, PJ
Pirich, AR
Donkor, EJ
TI Managing thermal emission: Plasmon/photon coupling using diffractive
optics technology - art. no. 697502
SO ENABLING PHOTONICS TECHNOLOGIES FOR DEFENSE, SECURITY, AND AEROSPACE
APPLICATIONS IV
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
(SPIE)
LA English
DT Proceedings Paper
CT Conference on Enabling Photonics Technologies for Defense, Security, and
Aerospace Application IV
CY MAR 17-18, 2008
CL Orlando, FL
SP SPIE
DE emission; absorption; plasmons; diffractive; gratings; infrared; thermal
ID NEAR-INFRARED REGION
AB We will discuss a passive thermal emission management surface that can manipulate the direction and wavelength bands of emission. We are designing and fabricating diffractive optics in materials that support surface-polariton plasmons. We use a grating in this material to couple the thermally-generated plasmons to photons. Grating parameters, such as grating depth and duty cycle, are varied to optimize the plasmon/photon coupling efficiency. The grating configuration ensures a phased, radiative response if the plasmon decay length along the surface traverses many grating periods. All of these parameters, material indices and dimensions, determine the specular and angular "shape" of emission.
C1 [Kerarne, S. A.; Cruz-Cabrera, A. A.; Peters, D. W.; Ellis, A. R.; Briggs, R. D.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Kerarne, SA (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
NR 10
TC 2
Z9 2
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 978-0-8194-7166-6
J9 P SOC PHOTO-OPT INS
PY 2008
VL 6975
BP 97502
EP 97502
DI 10.1117/12.778529
PG 9
WC Engineering, Aerospace; Optics
SC Engineering; Optics
GA BIB15
UT WOS:000258064800001
ER
PT J
AU Feeley, TJ
Skone, TJ
Stlegel, GJ
McNemar, A
Nemeth, M
Schimmoller, B
Murph, JT
Manfredo, L
AF Feeley, Thomas J., III
Skone, Timothy J.
Stlegel, Gary J., Jr.
McNemar, Andrea
Nemeth, Michael
Schimmoller, Brian
Murph, James T.
Manfredo, Lynn
TI Water: A critical resource in the thermoelectric power industry
SO ENERGY
LA English
DT Article
DE water resource availability; thermoelectric power; water consumption;
water withdrawal
AB Water availability represents a growing concern for meeting future power generation needs. In the United States, projected population growth rates, energy consumption patterns, and demand from competing water use sectors will increase pressure on power generators to reduce water use. Water availability and use also exhibit strong regional variations, complicating the nature of public policy and technological response.
The US Department of Energy's (DOE) National Energy Technology Laboratory (NETL) is engaged in a research and development (R&D) program to reduce freshwater withdrawal (total quantity of water utilized) and consumption (portion of withdrawal not returned to the source) from existing and future thermoelectric power generating facilities. The Innovations for Existing Plants (IEP) Program is currently developing technologies in 5 categories of water management projects to reduce water use while minimizing the impacts of plant operations on water quality.
This paper outlines the freshwater withdrawal and consumption rates for various thermoelectric power generating types and then estimates the potential benefits of IEP program technologies at both the national and regional levels in the year 2030. NETL is working to protect and conserve water resources while leveraging domestic fossil fuel resources, such as coal, to increase national energy security. (C) 2007 Elsevier Ltd. All rights reserved.
C1 [Skone, Timothy J.; Stlegel, Gary J., Jr.; Nemeth, Michael; Schimmoller, Brian; Murph, James T.; Manfredo, Lynn] Sci Applicat Int Corp, Pittsburgh, PA 15236 USA.
[Feeley, Thomas J., III; McNemar, Andrea] US DOE, Natl Energy Techno Lab, Pittsburgh, PA 15236 USA.
RP Skone, TJ (reprint author), Sci Applicat Int Corp, 626 Cochrans Mill Rd, Pittsburgh, PA 15236 USA.
EM skoiiet@netl.doe.gov
NR 9
TC 110
Z9 110
U1 5
U2 35
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0360-5442
J9 ENERGY
JI Energy
PD JAN
PY 2008
VL 33
IS 1
BP 1
EP 11
DI 10.1016/j.energy.2007.08.007
PG 11
WC Thermodynamics; Energy & Fuels
SC Thermodynamics; Energy & Fuels
GA 242XS
UT WOS:000251760100001
ER
PT J
AU Wray, C
Akbari, H
AF Wray, Craig
Akbari, Hashem
TI The effects of roof reflectance on air temperatures surrounding a
rooftop condensing unit
SO ENERGY AND BUILDINGS
LA English
DT Article
DE cool roofs; solar reflectance; rooftop unit performance; energy
efficiency
AB Recent anecdotal information suggests that "cool" roofs might produce significant energy savings by reducing the temperature of air entering rooftop air-conditioner (RTU) condensers. Unfortunately, measurements to support this claim are not well documented. To overcome this problem, we carried out a set of six rigorous field experiments to determine the effects of roof reflectance on the heating of condenser inlet air by the roof, and to assess the effects of condenser fan operation on the potential recirculation of hot discharge air from the condenser. The experiments involved combinations of two roof conditions (a "hot" roof and then the same roof with a "cool" coating) and three RTU operation modes (condenser fan and compressor both operating, condenser fan operating without the compressor, and condenser fan and compressor both not operating). For each case, we continuously measured outdoor air temperature at 26 locations near and far from the RTU, as well as roof surface temperatures at 2 locations (1 near and 1 far from the RTU), wind speed and direction, and solar radiation.
\With a "hot" roof and the compressor and condenser fan both operating, the air temperature at the condenser inlet was only 0.3 degrees C warmer on average during peak solar radiation times compared with a reference located far from the RTU. Applying a "cool" roof coating around the RTU eliminated this small temperature rise. The temperature rise was not significantly different when the condenser fan operated without the compressor, which suggests that hot air discharged by the condensing unit was not recirculated.
Based on published relationships for cooling capacity and system power versus condenser inlet air temperature (normalized, respectively, by the capacity and power at the ARI outdoor temperature rating point of 35 degrees C) the 0.3 degrees C reduction in inlet air temperature associated with installing a cool roof corresponds to a decrease in RTU energy consumption of about 0.3-0.6% and an increase in EER of about 0.6-0.7%. Energy codes such as ASHRAE Standards 90.1 and 90.2 and California Title 24 already include energy saving credits related to cool roofs. Additional energy savings from reducing condenser inlet air temperature by installing a cool roof would only slightly increase these credits. Published by Elsevier B.V.
C1 Lawrence Berkeley Natl Lab, Energy Performance Bldg Grp, Berkeley, CA 94720 USA.
Lawrence Berkeley Natl Lab, Heat Isl Grp, Berkeley, CA 94720 USA.
RP Akbari, H (reprint author), Lawrence Berkeley Natl Lab, Energy Performance Bldg Grp, Berkeley, CA 94720 USA.
EM H_Akbari@LBL.gov
NR 24
TC 9
Z9 9
U1 0
U2 7
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0378-7788
J9 ENERG BUILDINGS
JI Energy Build.
PY 2008
VL 40
IS 1
BP 11
EP 28
DI 10.1016/j.enbuild.2007.01.005
PG 18
WC Construction & Building Technology; Energy & Fuels; Engineering, Civil
SC Construction & Building Technology; Energy & Fuels; Engineering
GA 238WX
UT WOS:000251480200002
ER
PT J
AU Erhorn, H
Mroz, T
Morck, O
Schmidt, F
Schoff, L
Thomsen, KE
AF Erhorn, Hans
Mroz, Tomasz
Morck, Ove
Schmidt, Fritz
Schoff, Lorenz
Thomsen, Kirsten Engelund
TI The Energy Concept Adviser - A tool to improve energy efficiency in
educational buildings
SO ENERGY AND BUILDINGS
LA English
DT Article
DE lEA annex 36; energy consumption; Energy Concept Adviser; energy savings
AB Educational buildings such as kindergartens, schools and universities display many similar design, operation and maintenance features in most countries. The two most noteworthy similarities amongst these building types are the high energy consumption and the necessity for retrofitting many buildings within this sector. However, studies have shown that during retrofit, energy saving measures are only rarely applied, because the decision-makers lack knowledge of investments and the efficiency of potential energy saving measures. The main goal of the International Energy Agency ECBCS Annex 36 is to provide the educational building decision-makers with sufficient data, information and tools to improve their learning and teaching environments by improving the energy efficiency of their buildings.
This is the background for the development of an Energy Concept Adviser (ECA) for energy and financial retrofit measures that is useful during the planning and concept development phases for educational buildings. On the one hand to help the owner to find the most efficient energy saving measures and on the other hand to prevent that exaggerated expectations are raised. The ECA should be applicable during the entire retrofitting phase to ensure that both the calculated energy savings and financial success will be achieved after retrofitting.
This paper describes a tool that assists educational building decision-makers while the construction project is still in the design phase. This tool will improve new or existing buildings through the identification and calculation of potential energy savings. The ECA includes suggestions of energy systems to use and potential design concepts to be considered during the design phase.
During the past 6 years, data have been gathered from all the 10 participating countries of the Annex 36. This electronic Internet-based tool incorporates an interactive source book of information, which includes design concepts, design advise, design and decision programs, and case studies. The tool has been translated into several languages. (c) 2007 Elsevier B.V. All rights reserved.
C1 [Thomsen, Kirsten Engelund] Danish Bldg Res Inst, DK-2970 Horsholm, Denmark.
[Erhorn, Hans] Fraunhofer Inst Bldg Phys, D-70569 Stuttgart, Germany.
[Mroz, Tomasz] Poznan Tech Univ, Inst Environm Engn, PL-60965 Poznan, Poland.
[Morck, Ove] Cenergia Energy Consultant, DK-2750 Ballerup, Denmark.
[Schmidt, Fritz] Leiter Bereich F E Ennovatis GmbH, D-70469 Stuttgart, Germany.
[Schoff, Lorenz] US DOE, Blacksburg, VA USA.
RP Thomsen, KE (reprint author), Danish Bldg Res Inst, DK-2970 Horsholm, Denmark.
EM ket@sbi.dk
RI Mroz, Tomasz/K-8552-2014
NR 7
TC 13
Z9 13
U1 1
U2 14
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0378-7788
J9 ENERG BUILDINGS
JI Energy Build.
PY 2008
VL 40
IS 4
BP 419
EP 428
DI 10.1016/j.enbuild.2007.03.008
PG 10
WC Construction & Building Technology; Energy & Fuels; Engineering, Civil
SC Construction & Building Technology; Energy & Fuels; Engineering
GA 257HE
UT WOS:000252789000002
ER
PT J
AU Zhou, N
Lin, J
AF Zhou, Nan
Lin, Jiang
TI The reality and future scenarios of commercial building energy
consumption in China
SO ENERGY AND BUILDINGS
LA English
DT Article
DE China; Commercial building; Energy intensity; Energy efficiency;
Scenario; Elasticity; Bottom-up modeling; Energy statistics; Energy
consumption
AB While China's 11th Five-Year Plan called for a reduction of energy intensity by 2010, whether and how the energy consumption trend can be changed in a short time has been hotly debated. This research intends to evaluate the impact of a variety of scenarios of gross domestic product (GDP) growth, energy elasticity and energy-efficiency improvement on energy consumption in commercial buildings in China using a detailed China End-Use Energy Model.
China's official energy statistics have limited information on energy demand by end-use. This is a particularly pertinent issue for building energy consumption. The authors have applied reasoned judgments, based on experience of working on Chinese efficiency standards and energy-related programs, to present a realistic interpretation of the current energy data. The bottom-up approach allows detailed consideration of end-use intensity, equipment efficiency, etc., thus facilitating assessment of potential impacts of specific policy and technology changes on building energy use.
The results suggest that: (1) commercial energy consumption in China's current statistics is underestimated by about 44%, and the fuel mix is misleading; (2) energy-efficiency improvements will not be sufficient to offset the strong increase in end-use penetration and intensity in commercial buildings: (3) energy intensity (particularly electricity) in commercial buildings will increase; (4) different GDP growth and elasticity scenarios could lead to a wide range of floor area growth trajectories, and therefore, significantly impact energy consumption in commercial buildings. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Zhou, Nan] Ernest Orlando Lawrence Berkeley Natl Lab, Energy Anal Dept, Berkeley, CA 94720 USA.
RP Zhou, N (reprint author), Ernest Orlando Lawrence Berkeley Natl Lab, Energy Anal Dept, 1 Cyclotron Rd,MS 90R4000, Berkeley, CA 94720 USA.
EM NZhou@lbl.gov
FU McKinsey Global Institute (MGI)
FX The authors thank the McKinsey Global Institute (MGI) for its support of
this work. In particular the authors would like to thank Florian
Bressand for his involvement and advice that helped shape many of the
concepts presented here.
NR 18
TC 31
Z9 31
U1 1
U2 15
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0378-7788
J9 ENERG BUILDINGS
JI Energy Build.
PY 2008
VL 40
IS 12
BP 2121
EP 2127
DI 10.1016/j.enbuild.2008.06.009
PG 7
WC Construction & Building Technology; Energy & Fuels; Engineering, Civil
SC Construction & Building Technology; Energy & Fuels; Engineering
GA 363OI
UT WOS:000260276200003
ER
PT J
AU Devanathan, R
AF Devanathan, Ram
TI Recent developments in proton exchange membranes for fuel cells
SO ENERGY & ENVIRONMENTAL SCIENCE
LA English
DT Review
ID POLYMER ELECTROLYTE MEMBRANES; POLY(ARYLENE ETHER SULFONE);
PERFLUOROSULFONIC ACID MEMBRANES; X-RAY-SCATTERING; COPOLYMER COMPOSITE
MEMBRANES; MOLECULAR-DYNAMICS SIMULATION; HIGH-TEMPERATURE OPERATION;
HUMIDITY PEFC OPERATION; BASE IONIC LIQUIDS; SOLID-STATE NMR
AB Proton exchange membranes (PEMs) that operate at temperatures above 120 degrees C are needed to avoid catalyst poisoning, enhance electrochemical reactions, simplify the design and reduce the cost of fuel cells. This review summarizes developments in PEMs over the last five years. In order to design new membranes for elevated temperature operation, one must understand the chemistry, morphology and dynamics of protons and water molecules in existing membranes. The integration of experiment with modelling and simulation can shed light on the hierarchical structure of the membrane and dynamical processes associated with molecular transport. Based on such a fundamental understanding, membranes can be modified by controlling the polymer chemistry and architecture or adding inorganic fillers that can retain water under low relative humidity conditions. The development of anhydrous membranes based on phosphoric acid doped polymers, ionic liquid-infused polymer gels and solid acids can enable fuel cell operation above 150 degrees C. Considerable work remains to be done to identify proton transport mechanisms in novel membranes and evaluate membrane durability under real world operating conditions.
C1 Pacific NW Natl Lab, Div Chem & Mat Sci, Richland, WA 99352 USA.
RP Devanathan, R (reprint author), Pacific NW Natl Lab, Div Chem & Mat Sci, MS K8-87, Richland, WA 99352 USA.
EM ram.devanathan@pnl.gov
RI Devanathan, Ram/C-7247-2008
OI Devanathan, Ram/0000-0001-8125-4237
FU US Department of Energy's (DOE) Office of Basic Energy Sciences,
Chemical Sciences program
FX This work was supported by the US Department of Energy's (DOE) Office of
Basic Energy Sciences, Chemical Sciences program under the Hydrogen Fuel
Initiative. Pacific Northwest National Laboratory is operated by
Battelle for DOE.
NR 174
TC 230
Z9 237
U1 25
U2 169
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1754-5692
EI 1754-5706
J9 ENERG ENVIRON SCI
JI Energy Environ. Sci.
PY 2008
VL 1
IS 1
BP 101
EP 119
DI 10.1039/b808149m
PG 19
WC Chemistry, Multidisciplinary; Energy & Fuels; Engineering, Chemical;
Environmental Sciences
SC Chemistry; Energy & Fuels; Engineering; Environmental Sciences & Ecology
GA 414KB
UT WOS:000263861300020
ER
PT J
AU Heldebrant, DJ
Karkamkar, A
Linehan, JC
Autrey, T
AF Heldebrant, David J.
Karkamkar, Abhi
Linehan, John C.
Autrey, Tom
TI Synthesis of ammonia borane for hydrogen storage applications
SO ENERGY & ENVIRONMENTAL SCIENCE
LA English
DT Article
ID CHEMICAL EVIDENCE; THERMAL-DECOMPOSITION; LIQUID AMMONIA; METAL-SALTS;
DIBORANE; DIAMMONIATE; BOROHYDRIDE; HYDRIDES; H3NBH3; CLEAVAGE
AB A new synthetic procedure to make the condensed phase hydrogen storage material, ammonia borane (NH(3)BH(3), abbreviated as AB), is described and compared with previous literature procedures. Ammonia borane with a gravimetric density ca. 194 gm H(2) kg(-1) and a volumetric density ca. 146 H(2) litre(-1), is a promising chemical hydrogen storage material for fuel cell powered applications. The work shows that ammonium borohydride, NH(4)BH(4), formed in situ by the metathesis of NH(4)X and MBH(4) salts (M = Na, Li; X = Cl, F) in liquid NH(3), can be induced to decompose in an organic ether to yield AB in near quantitative yield. The purity of the AB prepared by this one-pot synthetic strategy is sufficient to meet the thermal stability requirements for on-board hydrogen storage.
C1 [Heldebrant, David J.; Karkamkar, Abhi; Linehan, John C.; Autrey, Tom] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Heldebrant, DJ (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA.
FU Office of Basic Energy Sciences of the Department of Energy, Chemical
Sciences program
FX This work was supported by the Office of Basic Energy Sciences of the
Department of Energy, Chemical Sciences program. The Pacific Northwest
National Laboratory is operated by Battelle for the US Department of
Energy. TA wishes to thank Sheldon Shore for brilliant discussions on
the history of AB and DADB.
NR 35
TC 56
Z9 59
U1 5
U2 36
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1754-5692
J9 ENERG ENVIRON SCI
JI Energy Environ. Sci.
PY 2008
VL 1
IS 1
BP 156
EP 160
DI 10.1039/b808865a
PG 5
WC Chemistry, Multidisciplinary; Energy & Fuels; Engineering, Chemical;
Environmental Sciences
SC Chemistry; Energy & Fuels; Engineering; Environmental Sciences & Ecology
GA 414KB
UT WOS:000263861300026
ER
PT J
AU Jacobsen, GM
Yang, JY
Twamley, B
Wilson, AD
Bullock, RM
DuBois, MR
DuBois, DL
AF Jacobsen, George M.
Yang, Jenny Y.
Twamley, Brendan
Wilson, Aaron D.
Bullock, R. Morris
DuBois, M. Rakowski
DuBois, Daniel L.
TI Hydrogen production using cobalt-based molecular catalysts containing a
proton relay in the second coordination sphere
SO ENERGY & ENVIRONMENTAL SCIENCE
LA English
DT Article
ID FE-ONLY HYDROGENASE; PENDANT NITROGEN BASES; ACTIVE-SITE MODELS; HYDRIDE
DONOR ABILITIES; IRON HYDROGENASE; DIPHOSPHINE LIGANDS; COMPLEXES M;
FUNCTIONAL MODELS; PHOSPHINE-LIGANDS; NIFE HYDROGENASE
AB The cobalt analogue of a highly active nickel electrocatalyst for hydrogen production has been synthesized and characterized as [Co(P(2)(Ph)N(2)(Ph))(2)(CH(3)CN)](BF(4))(2). In the presence of triflic acid in acetonitrile solution, the complex loses one cyclic diphosphine ligand to form [Co(P(2)(Ph)N(2)(Ph))(CH(3)CN)(3)](BF(4))(2), which has been synthesized independently and stucturally characterized. The latter complex serves as an electrocatalyst for hydrogen formation with a turnover frequency of 90 s(-1) and an overpotential of 285 mV using bromoanilinium tetrafluoroborate as the acid. A similar cobalt complex with a related diphosphine ligand that does not contain a pendant base is not catalytically active, confirming an important role for the pendant amine in the catalytic reaction.
C1 [Jacobsen, George M.; Wilson, Aaron D.] Univ Colorado, Dept Chem & Biochem, Boulder, CO 80309 USA.
[Yang, Jenny Y.; Bullock, R. Morris; DuBois, M. Rakowski; DuBois, Daniel L.] Pacific NW Natl Lab, Div Chem & Mat Sci, Richland, WA 99352 USA.
[Twamley, Brendan] Univ Idaho, Dept Chem, Moscow, ID 83844 USA.
RP Jacobsen, GM (reprint author), Univ Colorado, Dept Chem & Biochem, Boulder, CO 80309 USA.
RI Wilson, Aaron/C-4364-2008; Bullock, R. Morris/L-6802-2016
OI Wilson, Aaron/0000-0001-5865-6537; Bullock, R.
Morris/0000-0001-6306-4851
FU Office of Basic Energy Sciences of the Department of Energy
FX This work was supported by the Chemical Sciences program of the Office
of Basic Energy Sciences of the Department of Energy. The Pacific
Northwest National Laboratory is operated by Battelle for the US
Department of Energy. The Bruker (Siemens) SMART APEX diffraction
facility was established at the University of Idaho with the assistance
of the NSF-EPSCoR program and the M. J. Murdock Charitable Trust,
Vancouver, WA, USA.
NR 72
TC 97
Z9 97
U1 3
U2 27
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1754-5692
J9 ENERG ENVIRON SCI
JI Energy Environ. Sci.
PY 2008
VL 1
IS 1
BP 167
EP 174
DI 10.1039/b805309j
PG 8
WC Chemistry, Multidisciplinary; Energy & Fuels; Engineering, Chemical;
Environmental Sciences
SC Chemistry; Energy & Fuels; Engineering; Environmental Sciences & Ecology
GA 414KB
UT WOS:000263861300028
ER
PT J
AU Hao, SQ
Sholl, DS
AF Hao, Shiqiang
Sholl, David S.
TI Using first-principles calculations to accelerate materials discovery
for hydrogen purification membranes by modeling amorphous metals
SO ENERGY & ENVIRONMENTAL SCIENCE
LA English
DT Article
ID DENSITY-FUNCTIONAL THEORY; ALLOY MEMBRANES; ATOMISTIC SIMULATIONS;
MOLECULAR-DYNAMICS; DIFFUSION; STORAGE; PERMEATION; SOLUBILITY;
GASIFICATION; SEPARATION
AB Efficient purification of hydrogen from high temperature mixed gas streams can potentially play a critical role in the large-scale production of hydrogen from gasification of coal or biomass. Dense metal membranes have many favorable properties for this kind of purification, but existing membranes based on crystalline metal alloys have a number of limitations. The use of amorphous metal films as membranes has potential to overcome at least some of the disadvantages of crystalline metal membranes. We present new modeling methods that make it possible for the first time to quantitatively predict the performance of amorphous metal films as hydrogen purification membranes. These methods are introduced by examining amorphous Fe(3)B, a material where comparisons can be made to a crystalline material with the same composition. A membrane made from the amorphous material is predicted to have a hydrogen permeability 1.5-2 orders of magnitude higher than a crystalline membrane. The methods we introduce here will be useful in accelerating the development of amorphous membranes for practical applications.
C1 [Hao, Shiqiang] Carnegie Mellon Univ, Dept Chem Engn, Pittsburgh, PA 15213 USA.
[Hao, Shiqiang] Natl Energy Technol Lab, Pittsburgh, PA 15236 USA.
[Sholl, David S.] Georgia Inst Technol, Sch Chem & Biomol Engn, Atlanta, GA 30332 USA.
RP Hao, SQ (reprint author), Carnegie Mellon Univ, Dept Chem Engn, Pittsburgh, PA 15213 USA.
EM david.sholl@chbe.gatech.edu
FU U.S. Department of Energy through the National Energy Technology
Laboratory [41817M2044]
FX This work was supported by the U.S. Department of Energy through the
National Energy Technology Laboratory under grant No. 41817M2044.
NR 58
TC 37
Z9 37
U1 1
U2 15
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1754-5692
J9 ENERG ENVIRON SCI
JI Energy Environ. Sci.
PY 2008
VL 1
IS 1
BP 175
EP 183
DI 10.1039/b806909n
PG 9
WC Chemistry, Multidisciplinary; Energy & Fuels; Engineering, Chemical;
Environmental Sciences
SC Chemistry; Energy & Fuels; Engineering; Environmental Sciences & Ecology
GA 414KB
UT WOS:000263861300029
ER
PT J
AU Orbach, RL
AF Orbach, Raymond L.
TI The unity of science
SO ENERGY & ENVIRONMENTAL SCIENCE
LA English
DT Editorial Material
C1 US DOE, Washington, DC 20585 USA.
RP Orbach, RL (reprint author), US DOE, 1000 Independence Ave SW, Washington, DC 20585 USA.
NR 0
TC 0
Z9 0
U1 1
U2 3
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1754-5692
J9 ENERG ENVIRON SCI
JI Energy Environ. Sci.
PY 2008
VL 1
IS 4
BP 415
EP 416
DI 10.1039/b812783m
PG 2
WC Chemistry, Multidisciplinary; Energy & Fuels; Engineering, Chemical;
Environmental Sciences
SC Chemistry; Energy & Fuels; Engineering; Environmental Sciences & Ecology
GA 414TL
UT WOS:000263888000001
ER
PT J
AU Schwartz, SE
AF Schwartz, Stephen E.
TI Uncertainty in climate sensitivity: Causes, consequences, challenges
SO ENERGY & ENVIRONMENTAL SCIENCE
LA English
DT Article
ID SURFACE AIR-TEMPERATURE; GREENHOUSE GASES; CARBON-DIOXIDE; AEROSOLS;
FEEDBACK; IMPACTS; AERONET; MODELS; TRENDS; LEVEL
AB Fossil fuels supply about 85% of the world's primary energy, and future use would not appear limited by availability of reserves, especially of coal. Rather, future use of fossil fuels will likely be limited by controls on the emission of carbon dioxide into the atmosphere that are agreed to by the nations of the world. The increase in atmospheric CO2 over the past 200 years, mainly from fossil fuel combustion, is confidently thought to have increased global temperatures and induced other changes in Earth's climate, with the prospect of much more severe consequences from projected future emissions. Limiting such changes in Earth's climate would place major constraints on the combustion of fossil fuels and/or the emission of CO2 into the atmosphere. Developing effective and cost-effective strategies for limiting CO2 emissions requires the confident ability to project the changes in climate that would result from a given increase in atmospheric CO2. However, even the change in global mean surface temperature (GMST), the single most important index of climate change, that would result from a given increase in atmospheric CO2 remains uncertain to a factor of 2 or more, largely because of uncertainty in Earth's climate sensitivity, the change in GMST per change in radiative flux. This uncertainty in climate sensitivity, which gives rise to a comparable uncertainty in the shared global resource of the amount of fossil fuel that can be burned consonant with a given increase in global mean surface temperature, greatly limits the ability to effectively formulate strategies to limit climate change while meeting the world's future energy requirements. Key limits on determining climate sensitivity are the small change in downwelling longwave irradiance, less than one percent, that would give rise to changes in climate that reach the level of concern, the complexity of cloud processes and the difficulty of representing them in climate models, and limited understanding of the processes that control the radiative influences of atmospheric aerosols. A recent empirical calculation of Earth's climate sensitivity as the quotient of the relaxation time constant of GMST upon the effective heat capacity characterizing climate change on the multidecadal time scale points to a possible alternative approach to determining Earth's climate sensitivity. While improved knowledge of Earth's climate sensitivity is essential to development of optimal energy strategies, even for climate sensitivity at the low end of the range of present estimates, substantial reductions in CO2 emissions from their present values would be required to avert dangerous anthropogenic interference with the climate system that would otherwise occur well before the end of the present century.
C1 Brookhaven Natl Lab, Div Atmospher Sci, Upton, NY 11973 USA.
RP Schwartz, SE (reprint author), Brookhaven Natl Lab, Div Atmospher Sci, Upton, NY 11973 USA.
EM ses@bnl.gov
RI Schwartz, Stephen/C-2729-2008
OI Schwartz, Stephen/0000-0001-6288-310X
NR 90
TC 20
Z9 21
U1 2
U2 25
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1754-5692
EI 1754-5706
J9 ENERG ENVIRON SCI
JI Energy Environ. Sci.
PY 2008
VL 1
IS 4
BP 430
EP 453
DI 10.1039/b810350j
PG 24
WC Chemistry, Multidisciplinary; Energy & Fuels; Engineering, Chemical;
Environmental Sciences
SC Chemistry; Energy & Fuels; Engineering; Environmental Sciences & Ecology
GA 414TL
UT WOS:000263888000003
ER
PT J
AU Heldebrant, DJ
Yonker, CR
Jessop, PG
Phan, L
AF Heldebrant, David J.
Yonker, Clement R.
Jessop, Philip G.
Phan, Lam
TI Organic liquid CO2 capture agents with high gravimetric CO2 capacity
SO ENERGY & ENVIRONMENTAL SCIENCE
LA English
DT Article
ID SPECTROPHOTOMETRIC BASICITY SCALE; CARBON-DIOXIDE; IONIC LIQUID;
GAS-PHASE; ABSORPTION; ACETONITRILE; SOLVENTS; RELEASE; DBU; EXTENSION
AB We report a new class of CO2 binding organic liquids that chemically capture and release CO2 much more efficiently than aqueous alkanolamine systems. Mixtures of organic alcohols and amidine/guanidine bases reversibly bind CO2 chemically as liquid amidinium/guanidinium alkylcarbonates. The free energy of CO2 binding in these organic systems is very small and dependent on the choice of base, approximately -9 kJ mol(-1) for DBU and Barton's base and +2 kJ mol(-1) for 1,1,3,3-tetramethylguanidine. These CO2 capturing agents do not require an added solvent because they are liquid, and therefore have high CO2 capacities of up to 19% by weight for neat systems, and slightly less when dissolved in acetonitrile. The rate of CO2 uptake and release by these organic systems is limited by the rate of dissolution of CO2 into and out of the liquid phase. Gas absorption is selective for CO2 in both concentrated and dilute gas streams. These organic systems have been shown to bind and release CO2 for five cycles without losing activity or selectivity.
C1 [Heldebrant, David J.] Pacific NW Natl Lab, Mat Chem & Surface Res Grp, Energy & Efficiency Div, Richland, WA 99352 USA.
[Yonker, Clement R.] Pacific NW Natl Lab, Mol Interact & Transformat Grp, Fundamental & Computat Sci Directorate, Richland, WA 99352 USA.
[Jessop, Philip G.; Phan, Lam] Queens Univ, Dept Chem, Kingston, ON K7L 3N6, Canada.
RP Heldebrant, DJ (reprint author), Pacific NW Natl Lab, Mat Chem & Surface Res Grp, Energy & Efficiency Div, Richland, WA 99352 USA.
EM david.heldebrant@pnl.gov; clem.yonker@pnl.gov; jessop@chem.queensu.ca
FU Department of Energy's Energy Conversion Initiative (ECI); Pacific
Northwest National Laboratory (PNNL) Laboratory Directed Research and
Development; U. S. Department of Energy.
FX We would like to thank Richard Zheng for the design and assembly of the
automated gas burette system and John C. Linehan for helpful discussions
regarding the NMR measurements. This work was funded by the Department
of Energy's Energy Conversion Initiative (ECI), providing internal
Pacific Northwest National Laboratory (PNNL) Laboratory Directed
Research and Development. PNNL is operated by Battelle for the U. S.
Department of Energy.
NR 30
TC 122
Z9 124
U1 4
U2 77
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1754-5692
J9 ENERG ENVIRON SCI
JI Energy Environ. Sci.
PY 2008
VL 1
IS 4
BP 487
EP 493
DI 10.1039/b809533g
PG 7
WC Chemistry, Multidisciplinary; Energy & Fuels; Engineering, Chemical;
Environmental Sciences
SC Chemistry; Energy & Fuels; Engineering; Environmental Sciences & Ecology
GA 414TL
UT WOS:000263888000008
ER
PT J
AU Dilmore, R
Lu, P
Allen, D
Soong, Y
Hedges, S
Fu, JK
Dobbs, CL
Degalbo, A
Zhu, C
AF Dilmore, Robert
Lu, Peng
Allen, Douglas
Soong, Yee
Hedges, Sheila
Fu, Jaw K.
Dobbs, Charles L.
Degalbo, Angelo
Zhu, Chen
TI Sequestration of CO2 in mixtures of bauxite residue and saline
wastewater
SO ENERGY & FUELS
LA English
DT Article
ID RED MUD; SYSTEM; NEUTRALIZATION; SOLUBILITIES; AQUIFERS
AB Experiments were conducted to explore the concept of beneficially utilizing mixtures of caustic bauxite residue slurry (pH 13) and produced oil-field brine to sequester carbon dioxide from flue gas generated from industrial point sources. Data presented herein provide a preliminary assessment of the overall feasibility of this treatment concept. The Carbonation capacity of bauxite residue/brine mixtures was considered over the full range of reactant mixture combinations in 10% increments by volume. A bauxite residue/brine mixture of 90/10 by volume exhibited a CO2 sequestration capacity of greater than 9.5 g/L when exposed to pure CO2 at 20 degrees C and 0.689 MPa (100 psig). Dawsonite and calcite formation were predicted to be the dominant products of bauxite/brine mixture carbonation. It is demonstrated that CO2 sequestration is augmented by adding bauxite residue as a caustic agent to acidic brine solutions and that trapping is accomplished through both mineralization and solubilization. The product mixture solution was, in nearly all mixtures, neutralized following carbonation. However, in samples (bauxite residue/brine mixture of 90/10 by volume) containing bauxite residue solids, the pH was observed to gradually increase to as high as 9.7 after aging for 33 days, suggesting that the CO2 sequestration capacity of the samples increases with aging. Our geochemical models generally predicted the experimental results of carbon sequestration capacities and solution pH.
C1 [Dilmore, Robert; Soong, Yee; Hedges, Sheila; Degalbo, Angelo] US DOE, Natl Energy Technol Lab, Pittsburgh, PA 15236 USA.
[Lu, Peng; Zhu, Chen] Indiana Univ, Dept Geol Sci, Bloomington, IN 47405 USA.
[Allen, Douglas] Salem State Coll, Salem, MA 01970 USA.
[Fu, Jaw K.; Dobbs, Charles L.] ALCOA Tech Ctr, Alcoa Ctr, PA 15069 USA.
RP Soong, Y (reprint author), US DOE, Natl Energy Technol Lab, POB 10940, Pittsburgh, PA 15236 USA.
EM Yee.Soong@NETL.DOE.GOV
RI Lu, Peng/C-5148-2011; Zhu, Chen/A-5356-2010
OI Zhu, Chen/0000-0001-5374-6787
NR 34
TC 18
Z9 18
U1 2
U2 13
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0887-0624
J9 ENERG FUEL
JI Energy Fuels
PD JAN-FEB
PY 2008
VL 22
IS 1
BP 343
EP 353
DI 10.1021/ef7003943
PG 11
WC Energy & Fuels; Engineering, Chemical
SC Energy & Fuels; Engineering
GA 252GJ
UT WOS:000252434700052
ER
PT J
AU Ingram, L
Mohan, D
Bricka, M
Steele, P
Strobel, D
Crocker, D
Mitchell, B
Mohammad, J
Cantrell, K
Pittman, CU
AF Ingram, Leonard
Mohan, Dinesh
Bricka, Mark
Steele, Philip
Strobel, David
Crocker, David
Mitchell, Brian
Mohammad, Javeed
Cantrell, Kelly
Pittman, Charles U., Jr.
TI Pyrolysis of wood and bark in an auger reactor: Physical properties and
chemical analysis of the produced bio-oils
SO ENERGY & FUELS
LA English
DT Article
ID BIOMASS FAST PYROLYSIS; VACUUM PYROLYSIS; SOFTWOOD BARK; COLLOIDAL
PROPERTIES; SUGARCANE BAGASSE; AQUEOUS-PHASE; LIQUID FUEL; PART II;
FORESTRY RESIDUE; RENEWABLE FUELS
AB Bio-oil was produced at 450 degrees C by fast pyrolysis in a continuous auger reactor. Four feed stocks were used: pine wood, pine bark, oak wood, and oak bark. After extensive characterization of the whole bio-oils and their pyrolytic lignin-rich ethyl acetate fractions by gas chromatography/mass spectrometry (GC/MS), gel permeation chromatography (GPC), calorific values, viscosity dependences on shear rates and temperatures, elemental analyses, H-1 and C-13 NMR spectroscopy, water analyses, and ash content, these bio-oils were shown to be comparable to bio-oils produced by fast pyrolysis in fluidized bed and vacuum pyrolysis processes. This finding suggests that portable auger reactors might be used to produce bio-oil at locations in forests to generate bio-oil on-site for transport of the less bulky bio-oil (versus raw biomass) to biorefineries or power generation units. The pyrolysis reported herein had lower heat transfer rates than those achieved in fluidized bed reactors, suggesting significant further improvements are possible.
C1 [Ingram, Leonard; Steele, Philip; Strobel, David; Mitchell, Brian; Cantrell, Kelly] Mississippi State Univ, Dept Forest Prod, Mississippi State, MS 39762 USA.
[Mohan, Dinesh; Pittman, Charles U., Jr.] Mississippi State Univ, Dept Chem, Mississippi State, MS 39762 USA.
[Bricka, Mark; Mohammad, Javeed] Mississippi State Univ, Dept Chem Engn, Mississippi State, MS 39762 USA.
[Crocker, David] Mississippi State Univ, Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Ingram, L (reprint author), Mississippi State Univ, Dept Forest Prod, Mississippi State, MS 39762 USA.
EM lingram@cfr.msstate.edu; cpittman@chemistry.msstate.edu
OI Crocker, David/0000-0003-2341-4639; Mohan, Dinesh/0000-0002-3251-2946
NR 72
TC 188
Z9 194
U1 5
U2 122
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0887-0624
J9 ENERG FUEL
JI Energy Fuels
PD JAN-FEB
PY 2008
VL 22
IS 1
BP 614
EP 625
DI 10.1021/ef700335k
PG 12
WC Energy & Fuels; Engineering, Chemical
SC Energy & Fuels; Engineering
GA 252GJ
UT WOS:000252434700087
ER
PT J
AU Vine, E
Hamrin, J
AF Vine, Edward
Hamrin, Jan
TI Energy savings certificates: A market-based tool for reducing greenhouse
gas emissions
SO ENERGY POLICY
LA English
DT Article
DE energy savings certificates; GHG emissions; energy efficiency
AB Energy savings certificates (ESCs) are potentially a major tool that can be used by regulators and policy makers in reducing greenhouse gas (GHG) emissions. In this paper, we present our findings on the experience to date with ESCs, outline potential program opportunities in the US, and conclude with our perspective on how to proceed with the use of ESCs, particularly as a component of GHG reduction programs. (C) 2007 Elsevier Ltd. All rights reserved.
C1 [Vine, Edward] Lawrence Berkeley Natl Lab, EETD, Berkeley, CA 94708 USA.
[Hamrin, Jan] Ctr Resource Solut, San Francisco, CA 94129 USA.
RP Vine, E (reprint author), Lawrence Berkeley Natl Lab, EETD, Bldg 90-4000, Berkeley, CA 94708 USA.
EM elvine@lbl.gov
NR 8
TC 18
Z9 19
U1 2
U2 5
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0301-4215
J9 ENERG POLICY
JI Energy Policy
PD JAN
PY 2008
VL 36
IS 1
BP 467
EP 476
DI 10.1016/j.enpol.2007.10.001
PG 10
WC Energy & Fuels; Environmental Sciences; Environmental Studies
SC Energy & Fuels; Environmental Sciences & Ecology
GA 250LH
UT WOS:000252301100040
ER
PT J
AU Park, H
Yoon, SS
Jepsenc, RA
Helster, SD
Kim, HY
AF Park, Hongbok
Yoon, Sam S.
Jepsenc, Richard A.
Helster, Stephen D.
Kim, Ho Y.
TI Droplet bounce simulations and air pressure effects on the deformation
of pre-impact droplets, using a boundary element method
SO ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
LA English
DT Article
DE droplet impact; compressed gas; splashing; two-phase flow; bouncing
droplet
ID MOLTEN-METAL DROPLETS; SOLID-SURFACE
AB An inviscid axisymmetric model capable of predicting both droplet bounce and the detailed pre-impact motion that is influenced by ambient pressure has been developed using a boundary element method (BEM). Previous simulations could not accurately describe the effect of the gas compressed between a falling droplet and the impacting substrate because most droplet impact simulations assumed that the droplet was already in contact with the impacting substrate at the beginning of the simulation. To properly account for the surrounding gas, the simulation must begin when the droplet is released from a certain height. High pressures are Computed in the gas phase in the region between the droplet and the impact surface at instances just prior to impact. This simulation shows that the droplet retains its spherical shape when the surface tension energy is dominant over the dissipative energy. When the Weber number is increased, the droplet's Surface structure is highly deformed due to the presence of capillary waves and, consequently, a pyramidal surface structure is formed. This phenomenon was verified experimentally. Parametric studies using our model include the pre-impact behavior that varies as a function of the Weber number and the surrounding gas pressure. (C) 2007 Elsevier Ltd. All rights reserved.
C1 [Yoon, Sam S.; Kim, Ho Y.] Korea Univ, Dept Mech Engn, Seoul 136713, South Korea.
[Helster, Stephen D.] Purdue Univ, Sch Aeronaut & Astronaut, W Lafayette, IN 47907 USA.
[Jepsenc, Richard A.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Park, Hongbok] ADD, Taejon 305152, South Korea.
RP Yoon, SS (reprint author), Korea Univ, Dept Mech Engn, Anamdong 5-GA, Seoul 136713, South Korea.
EM skyoon@korea.ac.kr
NR 22
TC 4
Z9 4
U1 2
U2 17
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0955-7997
J9 ENG ANAL BOUND ELEM
JI Eng. Anal. Bound. Elem.
PD JAN
PY 2008
VL 32
IS 1
BP 21
EP 31
DI 10.1016/j.enganabound.2007.07.002
PG 11
WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary
Applications
SC Engineering; Mathematics
GA 259CM
UT WOS:000252916700003
ER
PT J
AU Litynski, JT
Plasynski, S
McIlvried, HG
Mahoney, C
Srivastava, RD
AF Litynski, John T.
Plasynski, Sean
McIlvried, Howard G.
Mahoney, Christopher
Srivastava, Rameshwar D.
TI The United States Department of Energy's Regional Carbon Sequestration
Partnerships Program Validation Phase
SO ENVIRONMENT INTERNATIONAL
LA English
DT Review
DE carbon; sequestration; CO2; carbon dioxide; regional; partnerships;
geologic; terrestrial
ID INTEGRATED COLLABORATIVE TECHNOLOGY; RESEARCH-AND-DEVELOPMENT; CO2;
SEPARATION; DIOXIDE; CAPTURE
AB This paper reviews the Validation Phase (Phase H) of the Department of Energy's Regional Carbon Sequestration Partnerships initiative. In 2003, the U.S. Department of Energy created a nationwide network of seven Regional Carbon Sequestration Partnerships (RCSP) to help determine and implement the technology, infrastructure, and regulations most appropriate to promote carbon sequestration in different regions of the nation. The objectives of the Characterization Phase (Phase I) were to characterize the geologic and terrestrial opportunities for carbon sequestration; to identify CO2 point sources within the territories of the individual partnerships; to assess the transportation infrastructure needed for future deployment; to evaluate CO2 capture technologies for existing and future power plants; and to identify the most promising sequestration opportunities that would need to be validated through a series of field projects.
The Characterization Phase was highly successful, with the following achievements: established a national network of companies and professionals working to support sequestration deployment; created regional and national carbon sequestration atlases for the United States and portions of Canada; evaluated available and developing technologies for the capture of CO2. from point sources; developed an improved understanding of the permitting requirements that future sequestration activities will need to address as well as defined the gap in permitting requirements for large scale deployment of these technologies; created a raised awareness of, and support for, carbon sequestration as a greenhouse gas (GHG) mitigation option, both within industry and among the general public; identified the most promising carbon sequestration opportunities for future field tests; and established protocols for project implementation, accounting, and management. Economic evaluation was started and is continuing and will be a factor in project selection.
During the Validation Phase, the seven regional partnerships will put the knowledge learned during the Characterization Phase into practice through field tests that will validate carbon sequestration technologies that are best suited to their respective regions of the country. These tests will verify technologies developed through DOE's core R&D effort and enable implementation of CO2 sequestration on a large scale, should that become necessary. Pilot projects will have a site-specific focus to test technology; assess formation storage capacity and injectivity; validate and refine existing CO2 formation models used to determine the transport and fate Of CO2 in the formation; demonstrate the integrity of geologic seals to contain CO2; validate monitoring, mitigation, and verification (MMV) technologies; define project costs and compare costs of alternatives; assess potential operational and long-term storage risks; address regulatory requirements; and engage and evaluate public acceptance of sequestration technologies. Field validation tests involving both sequestration in geologic formations and terrestrial sequestration are being developed.
The results from the Validation Phase will help to confirm the estimates made during the Characterization Phase and will be used to update the regional atlases and NatCarb. Answers to many questions about the effectiveness and safety of carbon sequestration technologies will be instrumental in planning for a Deployment Phase, in which large volume tests will be planned to further sequestration as an option that can mitigate GHG emissions in the United States. (C) 2007 Elsevier Ltd. All rights reserved.
C1 [Litynski, John T.; Plasynski, Sean] US DOE, Natl Energy Technol Lab, Morgantown, WV 26507 USA.
[Litynski, John T.; Plasynski, Sean] US DOE, Natl Energy Technol Lab, Pittsburgh, PA 15236 USA.
[McIlvried, Howard G.; Mahoney, Christopher; Srivastava, Rameshwar D.] Sci Applicat Int Corp, Natl Energy Technol Lab, Pittsburgh, PA 15236 USA.
RP Litynski, JT (reprint author), US DOE, Natl Energy Technol Lab, 3610 Collins Ferry Rd, Morgantown, WV 26507 USA.
EM john.litynski@netl.doe.gov
NR 19
TC 43
Z9 45
U1 0
U2 16
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0160-4120
J9 ENVIRON INT
JI Environ. Int.
PD JAN
PY 2008
VL 34
IS 1
BP 127
EP 138
DI 10.1016/j.envint.2007.07.005
PG 12
WC Environmental Sciences
SC Environmental Sciences & Ecology
GA 254RE
UT WOS:000252604900016
PM 17950875
ER
PT J
AU Yauk, CL
Polyzos, A
Rowan-Carroll, A
Kortubash, I
Williams, A
Kovalchuk, O
AF Yauk, Carole L.
Polyzos, Aris
Rowan-Carroll, Andrea
Kortubash, Igor
Williams, Andrew
Kovalchuk, Olga
TI Tandem repeat mutation, global DNA methylation, and regulation of DNA
methyltransferases in cultured mouse embryonic fibroblast cells
chronically exposed to chemicals with different modes of action
SO ENVIRONMENTAL AND MOLECULAR MUTAGENESIS
LA English
DT Article
DE expanded simple tandem repeat; mutation; methylation; DNA
methyltransferases
ID RADIATION-INDUCED MUTATION; EPIGENETIC TRANSGENERATIONAL ACTIONS;
GERMLINE MUTATION; MINISATELLITE MUTATION; IN-VIVO; ENDOCRINE
DISRUPTORS; HERITABLE MUTATIONS; GENOME INSTABILITY; CHERNOBYL ACCIDENT;
DNMT1 DEFICIENCY
AB Mutations at expanded simple tandem repeat (ESTR) DNA sequences provide a useful tool for screening germline mutation. However, the mechanisms resulting in induced mutations are unknown and provide an impediment to the utility of the method. Induced ESTR mutations arise through a nontargeted mechanism resulting in destabilization of the repeat locus. We hypothesized that alterations in DNA methylation, or in DNA methyltransferase expression, may be associated with this indirect mechanism of mutation. DNA mutation frequency was measured in C3H/10T1/2 mouse embryonic fibroblast cells following chronic exposure to six chemicals exhibiting different modes of genotoxic action: N-nitroso-N-ethylurea (ENU); benzo(a)pyrene (BaP); etoposide (STOP); okadaic acid (OA); cisplatin (CisPt); and 5-azacytidine (5azadC). Induced mutation ranged from 2-fold (ENU, BaP, ETOP), to 1.3-1.4 fold (OA, 5azadC), to nonresponsive (CisPt). Global DNA methylation, measured using the cytosine extension assay, revealed hypomethylation following exposure to ENU and 5azadC, hypermethylation following BaP and OA exposure, and no change following treatment with ETOP or CisPt. DNA methyltransferase transcription (Dnmt1, Dnmt3a, Dnmt3b) was significantly affected by all treatments except ETOP, with the vast majority of changes being downregulation. There was no direct correlation between ESTR mutation, global methylation, or DNA methyltransferase transcription. However, 4/5 ESTR mutagens caused changes in global methylation, while the noninducer (CisPt) did not cause changes in methylation. We hypothesize that chemicals that modify chromatin conformation through changes in methylation may compromise the ability of mismatch repair enzymes (or other enzymes) to access and repair secondary structures that may form across ESTR loci resulting in mutation.
C1 [Yauk, Carole L.; Rowan-Carroll, Andrea; Williams, Andrew] Hlth Canada, Safe Environm Programme, Environm Hlth Sci & Res Bur, Ottawa, ON K1A 0L2, Canada.
[Polyzos, Aris] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA.
[Kortubash, Igor; Kovalchuk, Olga] Univ Lethbridge, Dept Biol Sci, Lethbridge, AB T1K 3M4, Canada.
RP Yauk, CL (reprint author), HECSB, Environm & Occupat Toxicol Div, Ottawa, ON K1A 0K9, Canada.
EM carole_yauk@hc-sc.gc.ca
OI Yauk, Carole/0000-0003-4919-876X
NR 69
TC 22
Z9 25
U1 2
U2 6
PU WILEY-LISS
PI HOBOKEN
PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA
SN 0893-6692
J9 ENVIRON MOL MUTAGEN
JI Environ. Mol. Mutagen.
PD JAN
PY 2008
VL 49
IS 1
BP 26
EP 35
DI 10.1002/em.20359
PG 10
WC Environmental Sciences; Genetics & Heredity; Toxicology
SC Environmental Sciences & Ecology; Genetics & Heredity; Toxicology
GA 255JG
UT WOS:000252653700005
PM 18172875
ER
PT J
AU Wellman, DM
Glovack, JN
Parker, K
Richards, EL
Pierce, EM
AF Wellman, Dawn M.
Glovack, Julia N.
Parker, Kent
Richards, Emily L.
Pierce, Eric M.
TI Sequestration and retention of uranium(VI) in the presence of
hydroxylapatite under dynamic geochemical conditions
SO ENVIRONMENTAL CHEMISTRY
LA English
DT Article
DE kinetics; sorption; speciation
ID IN-SITU TREATMENT; HYDROXYAPATITE ADDITION; CONTAMINATED SEDIMENTS;
AQUEOUS-SOLUTIONS; IMMOBILIZATION; SOILS; SOLUBILITY; SPECIATION;
SORPTION; METALS
AB Numerous solid-and aqueous-phase phosphate-based technologies for remediating heavy metals and radionuclides have the common premise of sequestration by hydroxylapatite. Complexation reactions and hydrolysis generally preclude actinides from incorporation into intracrystalline sites; rather, surface sorption and precipitation are significant mechanisms for the sequestration of actinides. The effect of pH, aqueous speciation, and the availability of reactive surface sites on minerals such as hydroxylapatite have a significant impact on the mechanism and degree of sequestration and retention of variably charged contaminants such as uranium. Yet, little attention has been given to the sequestration and retention of uranium by hydroxylapatite under dynamic geochemical conditions that may be encountered during remediation activities. We present the results of an investigation evaluating the removal of uranium by hydroxylapatite in systems near equilibrium with respect to hydroxylapatite, and the effect of dynamic aqueous geochemical conditions, such as those encountered during and subsequent to remediation activities, on the retention of uranium. Results presented here support previous investigations demonstrating the efficiency of hydroxylapatite for sequestration of uranium and illustrate the importance of geochemical conditions, including changes to surface properties and aqueous speciation, on the sequestration and retention of uranium.
C1 [Wellman, Dawn M.; Parker, Kent; Richards, Emily L.; Pierce, Eric M.] Pacific NW Natl Lab, Richland, WA 99354 USA.
[Glovack, Julia N.] Colorado Sch Mines, Dept Chem & Geochem, Golden, CO 80401 USA.
RP Wellman, DM (reprint author), Pacific NW Natl Lab, POB 999,K3-62, Richland, WA 99354 USA.
EM dawn.wellman@pnl.gov
RI Pierce, Eric/G-1615-2011
OI Pierce, Eric/0000-0002-4951-1931
NR 59
TC 15
Z9 15
U1 1
U2 16
PU CSIRO PUBLISHING
PI COLLINGWOOD
PA 150 OXFORD ST, PO BOX 1139, COLLINGWOOD, VICTORIA 3066, AUSTRALIA
SN 1448-2517
J9 ENVIRON CHEM
JI Environ. Chem.
PY 2008
VL 5
IS 1
BP 40
EP 50
DI 10.1071/EN07060
PG 11
WC Chemistry, Analytical; Environmental Sciences
SC Chemistry; Environmental Sciences & Ecology
GA 265CP
UT WOS:000253337000007
ER
PT J
AU Pierce, EM
Richards, EL
Davis, AM
Reed, LR
Rodriguez, EA
AF Pierce, E. M.
Richards, E. L.
Davis, A. M.
Reed, L. R.
Rodriguez, E. A.
TI Aluminoborosilicate waste glass dissolution under alkaline conditions at
40 degrees C: implications for a chemical affinity-based rate equation
SO ENVIRONMENTAL CHEMISTRY
LA English
DT Article
DE boron coordination; forward rate; free energy of hydration; low-activity
waste glass; Transition State Theory
ID ALTERATION KINETICS; NUCLEAR GLASS; RATE LAW; PH; 25-DEGREES-C;
TEMPERATURE; DURABILITY; MECHANISMS; PLUTONIUM; MINERALS
AB Single-pass flow-through experiments were conducted with aluminoborosilicate waste glasses to evaluate how changes in solution composition affect the dissolution rate (r) at 40 degrees C and pH (23 degrees C)= 9.0. The three prototypic low-activity waste (LAW) glasses, LAWE-1A, -95A and -290A, used in these experiments span a wide range covering the expected processing composition of candidate immobilised low-activity waste (ILAW) glasses. Results suggest incongruent release of Al, B, Na, and Si at low flow-rate (q) to sample surface area (S), in units of (m s(-1)), (log(10) (q/S) <-8.9) whereas congruent release is observed at high q/S (log(10) (q/S)>-7.9). Dissolution rates increase from log10 (q/S)approximate to -9.3 to -8.0 and then become constant at log10 (q/S)>-7.9. Forward (maximum) dissolution rates, based on B release, are the same irrespective of glass composition, evident by the dissolution rates being within the experimental error of one another (r(1A) = 0.0301 +/- 0.0153 gm(-2) day(-1), r(95A) = 0.0248 +/- 0.0125 gm(-2) day(-1), and r(290A) = 0.0389 +/- 0.0197 gm(-2) day(-1)). The results also illustrate that as the activity of SiO2(aq) increases, the rate of glass dissolution decreases to a residual rate. The pseudo-equilibrium constant, K-g, (log(10) (K-g)=-3.7) predicted with these results is slightly lower than the K for chalcedony (log(10) (K)=-3.48) at 40 degrees C. Finally, these results support the use of a chemical affinity-based rate law to describe glass dissolution as a function of solution composition.
C1 [Pierce, E. M.; Richards, E. L.; Davis, A. M.; Reed, L. R.; Rodriguez, E. A.] Pacific NW Natl Lab, Energy & Environm Directorate, Richland, WA 99354 USA.
RP Pierce, EM (reprint author), Pacific NW Natl Lab, Energy & Environm Directorate, POB 999,MS K3-62, Richland, WA 99354 USA.
EM eric.pierce@pnl.gov
RI Pierce, Eric/G-1615-2011
OI Pierce, Eric/0000-0002-4951-1931
NR 47
TC 10
Z9 10
U1 0
U2 8
PU CSIRO PUBLISHING
PI COLLINGWOOD
PA 150 OXFORD ST, PO BOX 1139, COLLINGWOOD, VICTORIA 3066, AUSTRALIA
SN 1448-2517
J9 ENVIRON CHEM
JI Environ. Chem.
PY 2008
VL 5
IS 1
BP 73
EP 85
DI 10.1071/EN07058
PG 13
WC Chemistry, Analytical; Environmental Sciences
SC Chemistry; Environmental Sciences & Ecology
GA 265CP
UT WOS:000253337000010
ER
PT J
AU Lee, RN
Wright, BW
AF Lee, Richard N.
Wright, Bob W.
TI Detection of Banned and Restricted Ozone-Depleting Chemicals in Printed
Circuit Boards
SO ENVIRONMENTAL FORENSICS
LA English
DT Article
DE ozone-depleting chemicals; Montreal Protocol; residual solvents; purge
and trap; precision cleaning; thermal desorption analysis
ID VOLATILE ORGANIC-COMPOUNDS; GAS-CHROMATOGRAPHY; RESIDUAL SOLVENTS;
HEADSPACE; PRODUCTS; FOODS
AB A more-than-5-year study directed toward the detection of trace residual halogenated solvents in circuit boards was recently completed. This work was undertaken to demonstrate the potential for reliable detection of solvents used during the fabrication of printed circuit boards found in a wide variety of electronic products. Residual solvent detection was demonstrated for spiked boards after an aging period of 5 months and for printed circuit boards removed from a variety of used (at least 5 years old) and new electronic products. The analytical system and standard operating procedure developed during this study provide the tools required to assess and confirm compliance with regulations associated with the use of ozone depleting chemicals.
C1 [Lee, Richard N.; Wright, Bob W.] Pacific NW Natl Lab, Natl Secur Directorate, Richland, WA 99352 USA.
RP Wright, BW (reprint author), Pacific NW Natl Lab, Natl Secur Directorate, POB 999, Richland, WA 99352 USA.
EM bob.wright@pnl.gov
FU Internal Revenue Service (IRS) [DE-AC05-76RLO 1830]; Pacific Northwest
National Laboratory (PNNL)
FX This work was supported by Internal Revenue Service (IRS) under an
Interagency Agreement with the US Department of Energy (DOE) under
Contract DE-AC05-76RLO 1830 with the Pacific Northwest National
Laboratory (PNNL). Battelle Memorial Institute operates the Pacific
Northwest National Laboratory. The views, opinions, or findings
contained within this report are those of the authors and should not be
construed as official position, policy, or decision of the DOE or IRS
unless designated by other documentation.
NR 30
TC 0
Z9 0
U1 0
U2 1
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1527-5922
J9 ENVIRON FORENSICS
JI Environ. Forensics
PY 2008
VL 9
IS 4
BP 320
EP 339
AR PII 906614023
DI 10.1080/15275920802502083
PG 20
WC Environmental Sciences
SC Environmental Sciences & Ecology
GA 383LO
UT WOS:000261675300006
ER
PT J
AU Marshall, MJ
Plymale, AE
Kennedy, DW
Shi, L
Wang, ZM
Reed, SB
Dohnalkova, AC
Simonson, CJ
Liu, CX
Saffarini, DA
Romine, MF
Zachara, JM
Beliaev, AS
Fredrickson, JK
AF Marshall, Matthew J.
Plymale, Andrew E.
Kennedy, David W.
Shi, Liang
Wang, Zheming
Reed, Samantha B.
Dohnalkova, Alice C.
Simonson, Cody J.
Liu, Chongxuan
Saffarini, Daad A.
Romine, Margaret F.
Zachara, John M.
Beliaev, Alexander S.
Fredrickson, James K.
TI Hydrogenase- and outer membrane c-type cytochrome-facilitated reduction
of technetium(VII) by Shewanella oneidensis MR-1
SO ENVIRONMENTAL MICROBIOLOGY
LA English
DT Article
ID PUTREFACIENS MR-1; ESCHERICHIA-COLI; MICROBIAL REDUCTION;
DESULFOVIBRIO-DESULFURICANS; DISSIMILATORY REDUCTION; ANAEROBIC
RESPIRATION; MN(IV) REDUCTION; FE(III); BACTERIUM; OMCA
AB Pertechnetate, Tc-99(VII)O-4(-), is a highly mobile radionuclide contaminant at US Department of Energy sites that can be enzymatically reduced by a range of anaerobic and facultatively anaerobic microorganisms, including Shewanella oneidensis MR-1, to poorly soluble Tc(IV)O-2(s). In other microorganisms, Tc(VII)O-4(-) reduction is generally considered to be catalysed by hydrogenase. Here, we provide evidence that although the NiFe hydrogenase of MR-1 was involved in the H-2-driven reduction of Tc(VII)O-4(-) [presumably through a direct coupling of H-2 oxidation and Tc(VII) reduction], the deletion of both hydrogenase genes did not completely eliminate the ability of MR-1 to reduce Tc(VII). With lactate as the electron donor, mutants lacking the outer membrane c-type cytochromes MtrC and OmcA or the proteins required for the maturation of c-type cytochromes were defective in reducing Tc(VII) to nanoparticulate TcO2.nH(2)O((s)) relative to MR-1 or a NiFe hydrogenase mutant. In addition, reduced MtrC and OmcA were oxidized by Tc(VII)O-4(-), confirming the capacity for direct electron transfer from these OMCs to TcO4-. c-Type cytochrome-catalysed Tc(VII) reduction could be a potentially important mechanism in environments where organic electron donor concentrations are sufficient to allow this reaction to dominate.
C1 [Marshall, Matthew J.; Plymale, Andrew E.; Kennedy, David W.; Shi, Liang; Reed, Samantha B.; Romine, Margaret F.; Beliaev, Alexander S.; Fredrickson, James K.] Pacific NW Natl Lab, Div Biol Sci, Richland, WA 99354 USA.
[Wang, Zheming; Liu, Chongxuan; Zachara, John M.] Pacific NW Natl Lab, Div Chem & Mat Sci, Richland, WA 99354 USA.
[Saffarini, Daad A.] Univ Wisconsin, Dept Biol Sci, Milwaukee, WI 53211 USA.
RP Marshall, MJ (reprint author), Pacific NW Natl Lab, Div Biol Sci, Richland, WA 99354 USA.
EM matthew.marshall@pnl.gov
RI Liu, Chongxuan/C-5580-2009; Wang, Zheming/E-8244-2010; Beliaev,
Alexander/E-8798-2016;
OI Wang, Zheming/0000-0002-1986-4357; Beliaev,
Alexander/0000-0002-6766-4632; Kennedy, David/0000-0003-0763-501X;
Romine, Margaret/0000-0002-0968-7641
NR 57
TC 41
Z9 44
U1 1
U2 39
PU BLACKWELL PUBLISHING
PI OXFORD
PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND
SN 1462-2912
J9 ENVIRON MICROBIOL
JI Environ. Microbiol.
PD JAN
PY 2008
VL 10
IS 1
BP 125
EP 136
DI 10.1111/j.1462-2920.2007.01438.x
PG 12
WC Microbiology
SC Microbiology
GA 252JO
UT WOS:000252443000012
PM 17888007
ER
PT S
AU McIntosh, BS
Giupponi, C
Voinov, AA
Smith, C
Matthews, KB
Monticino, M
Kolkman, MJ
Crossman, N
van Ittersum, M
Haase, D
Haase, A
Mysiak, J
Groot, JCJ
Sieber, S
Verweij, P
Quinn, N
Waeger, P
Gaber, N
Hepting, D
Scholten, H
Sulis, A
van Delden, H
Gaddis, E
Assaf, H
AF McIntosh, B. S.
Giupponi, C.
Voinov, A. A.
Smith, C.
Matthews, K. B.
Monticino, M.
Kolkman, M. J.
Crossman, N.
van Ittersum, M.
Haase, D.
Haase, A.
Mysiak, J.
Groot, J. C. J.
Sieber, S.
Verweij, P.
Quinn, N.
Waeger, P.
Gaber, N.
Hepting, D.
Scholten, H.
Sulis, A.
van Delden, H.
Gaddis, E.
Assaf, H.
BE Jakeman, AJ
Voinov, AA
Rizzoli, AE
Chen, SH
TI BRIDGING THE GAPS BETWEEN DESIGN AND USE: DEVELOPING TOOLS TO SUPPORT
ENVIRONMENTAL MANAGEMENT AND POLICY
SO ENVIRONMENTAL MODELLING, SOFTWARE AND DECISION SUPPORT: STATE OF THE ART
AND NEW PERSPECTIVES
SE Developments in Integrated Environmental Assessment
LA English
DT Article; Book Chapter
ID DECISION-SUPPORT; LAND-USE; RESOURCE-MANAGEMENT; MODELS; SYSTEMS;
SIMULATION; COMMUNICATION; LANDSCAPE; KNOWLEDGE; SCIENCE
C1 [McIntosh, B. S.] Cranfield Univ, Ctr Water Sci, Cranfield MK43 0AL, Beds, England.
[Giupponi, C.] Univ Ca Foscari Venezia, Dipartimento Sci Econ, Ctr Environm Econ & Management, I-30121 Venice, Italy.
[Voinov, A. A.] Chesapeake Res Consortium, Edgewater, MD 21037 USA.
[Smith, C.] Oregon State Univ, Dept Anthropol, Corvallis, OR 97331 USA.
[Matthews, K. B.] Macaulay Inst, Landscape Change Programme, Aberdeen AB15 8QH, Scotland.
[Monticino, M.] Univ N Texas, Dept Math, Denton, TX 76203 USA.
[Kolkman, M. J.] Univ Twente, Fac Engn Technol, NL-7500 AE Enschede, Netherlands.
[Crossman, N.] CSIRO Land & Water, Policy & Econ Res Unit, Glen Osmond, SA 5064, Australia.
[van Ittersum, M.] Wageningen Univ, NL-6700 AK Wageningen, Netherlands.
[Haase, D.] UFZ, Dept Computat Landscape Ecol, Helmholtz Ctr Environm Res, D-04318 Leipzig, Germany.
[Haase, A.] UFZ, Dept Urban & Environm Sociol, Helmholtz Ctr Environm Res, D-04318 Leipzig, Germany.
[Mysiak, J.] Fdn Eni Enrico Mattei, I-30122 Venice, Italy.
[Groot, J. C. J.] Wageningen Univ, NL-6709 PG Wageningen, Netherlands.
[Sieber, S.] Leibniz Ctr Agr Landscape Res, D-15374 Muncheberg, Germany.
[Verweij, P.] Alterra, NL-6700 AA Wageningen, Netherlands.
[Quinn, N.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Waeger, P.] Empa, Mat Sci & Technol, Technol & Soc Lab, CH-9014 St Gallen, Switzerland.
[Gaber, N.] US EPA, Washington, DC 20460 USA.
[Hepting, D.] Univ Regina, Dept Comp Sci, Regina, SK S4S 0A2, Canada.
[Scholten, H.] Wageningen Univ, Informat Technol Grp, NL-6706 EW Wageningen, Netherlands.
[Sulis, A.] Univ Cagliari, Dept Land Engn, Hydraul Sectr, I-09123 Cagliari, CA, Italy.
[van Delden, H.] RIKS, NL-6200 AL Maastricht, Netherlands.
[Gaddis, E.] SWCA Environm Consultants, Salt Lake City, UT 84111 USA.
[Assaf, H.] Amer Univ Beirut, Dept Civil & Environm Engn, Beirut 11072020, Lebanon.
RP McIntosh, BS (reprint author), Cranfield Univ, Ctr Water Sci, Coll Rd, Cranfield MK43 0AL, Beds, England.
RI Quinn, Nigel/G-2407-2015
OI Quinn, Nigel/0000-0003-3333-4763
NR 61
TC 8
Z9 8
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1574-101X
BN 978-0-08-091530-2
J9 DEV INTEG ENVIRON
PY 2008
VL 3
BP 33
EP 48
PG 16
WC Environmental Sciences; Meteorology & Atmospheric Sciences
SC Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences
GA BCO90
UT WOS:000310922300004
ER
PT S
AU Mysiak, J
Brown, JD
Jansen, JML
Quinn, NWT
AF Mysiak, J.
Brown, J. D.
Jansen, J. M. L.
Quinn, N. W. T.
BE Jakeman, AJ
Voinov, AA
Rizzoli, AE
Chen, SH
TI ENVIRONMENTAL POLICY AID UNDER UNCERTAINTY
SO ENVIRONMENTAL MODELLING, SOFTWARE AND DECISION SUPPORT: STATE OF THE ART
AND NEW PERSPECTIVES
SE Developments in Integrated Environmental Assessment
LA English
DT Article; Book Chapter
ID DECISION-MAKING; RISK; MANAGEMENT; INFORMATION; JUDGMENT; SCIENCE;
BIASES; SUSTAINABILITY; PROBABILITY; METHODOLOGY
C1 [Mysiak, J.] FEEM, I-30122 Venice, Italy.
[Brown, J. D.] NOAA, Hydrol Ensemble Predict Grp, Off Hydrol Dev, NWS, Silver Spring, MD 20910 USA.
[Jansen, J. M. L.] Univ Wageningen & Res Ctr, Alterra, NL-6700 AA Wageningen, Netherlands.
[Quinn, N. W. T.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP Mysiak, J (reprint author), FEEM, Castello 5252, I-30122 Venice, Italy.
RI Quinn, Nigel/G-2407-2015
OI Quinn, Nigel/0000-0003-3333-4763
NR 64
TC 3
Z9 3
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1574-101X
BN 978-0-08-091530-2
J9 DEV INTEG ENVIRON
PY 2008
VL 3
BP 87
EP 100
PG 14
WC Environmental Sciences; Meteorology & Atmospheric Sciences
SC Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences
GA BCO90
UT WOS:000310922300007
ER
PT S
AU Rizzoli, AE
Leavesley, G
Ascough, JC
Argent, RM
Athanasiadis, IN
Brilhante, V
Claeys, FHA
David, O
Donatelli, M
Gijsbers, P
Havlik, D
Kassahun, A
Krause, P
Quinn, NWT
Scholten, H
Sojda, RS
Villa, F
AF Rizzoli, A. E.
Leavesley, G.
Ascough, J. C., II
Argent, R. M.
Athanasiadis, I. N.
Brilhante, V.
Claeys, F. H. A.
David, O.
Donatelli, M.
Gijsbers, P.
Havlik, D.
Kassahun, A.
Krause, P.
Quinn, N. W. T.
Scholten, H.
Sojda, R. S.
Villa, F.
BE Jakeman, AJ
Voinov, AA
Rizzoli, AE
Chen, SH
TI INTEGRATED MODELLING FRAMEWORKS FOR ENVIRONMENTAL ASSESSMENT AND
DECISION SUPPORT
SO ENVIRONMENTAL MODELLING, SOFTWARE AND DECISION SUPPORT: STATE OF THE ART
AND NEW PERSPECTIVES
SE Developments in Integrated Environmental Assessment
LA English
DT Article; Book Chapter
ID SYSTEMS
C1 [Rizzoli, A. E.; Athanasiadis, I. N.] IDSIA, CH-6928 Manno, Switzerland.
[Leavesley, G.; David, O.] US Geol Survey, Denver Fed Ctr, Lakewood, CO 80225 USA.
[Ascough, J. C., II] ARS, USDA, NPA, Agr Syst Res Unit, Ft Collins, CO 80526 USA.
[Argent, R. M.] Bur Meteorol, Water Div, Melbourne, Vic 3001, Australia.
[Brilhante, V.] Univ Fed Amazonas, Dept Comp Sci, BR-69077000 Manaus, Amazonas, Brazil.
[Claeys, F. H. A.] Univ Ghent, Dept Appl Math Biometr & Proc Control, B-9000 Ghent, Belgium.
[Donatelli, M.] Joint Res Ctr, IPSC, Agri4cast Act, I-21027 Ispra, VA, Italy.
[Gijsbers, P.] WL Delft Hydraul, Inland Water Syst, NL-2600 MH Delft, Netherlands.
[Havlik, D.] Austrian Res Ctr GmbH, ARC, Smart Syst Div, A-2444 Seibersdorf, Austria.
[Kassahun, A.] Informat Technol Grp, Dept Social Sci, NL-6706 KN Wageningen, Netherlands.
[Krause, P.] Univ Jena, Inst Geog, Lehrstuhl Geoinformat, D-07743 Jena, Germany.
[Quinn, N. W. T.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Scholten, H.] Wageningen Univ, Informat Technol Grp, NL-6706 EW Wageningen, Netherlands.
[Sojda, R. S.] Montana State Univ, USDI, No Rocky Mt Sci Ctr, Bozeman, MT 59717 USA.
[Villa, F.] Univ Vermont, Gund Inst Ecol Econ, Burlington, VT 05405 USA.
RP Rizzoli, AE (reprint author), IDSIA, Galleria 2, CH-6928 Manno, Switzerland.
RI Rizzoli, Andrea Emilio/B-2985-2010; Quinn, Nigel/G-2407-2015
OI Rizzoli, Andrea Emilio/0000-0001-8179-0750; Quinn,
Nigel/0000-0003-3333-4763
NR 27
TC 9
Z9 9
U1 0
U2 4
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1574-101X
BN 978-0-08-091530-2
J9 DEV INTEG ENVIRON
PY 2008
VL 3
BP 101
EP 118
PG 18
WC Environmental Sciences; Meteorology & Atmospheric Sciences
SC Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences
GA BCO90
UT WOS:000310922300008
ER
PT S
AU Assaf, H
van Beek, E
Borden, C
Gijsbers, P
Jolma, A
Kaden, S
Kaltofen, M
Labadie, JW
Loucks, DP
Quinn, NWT
Sieber, J
Sulis, A
Werick, WJ
Wood, DM
AF Assaf, H.
van Beek, E.
Borden, C.
Gijsbers, P.
Jolma, A.
Kaden, S.
Kaltofen, M.
Labadie, J. W.
Loucks, D. P.
Quinn, N. W. T.
Sieber, J.
Sulis, A.
Werick, W. J.
Wood, D. M.
BE Jakeman, AJ
Voinov, AA
Rizzoli, AE
Chen, SH
TI GENERIC SIMULATION MODELS FOR FACILITATING STAKEHOLDER INVOLVEMENT IN
WATER RESOURCES PLANNING AND MANAGEMENT: A COMPARISON, EVALUATION, AND
IDENTIFICATION OF FUTURE NEEDS
SO ENVIRONMENTAL MODELLING, SOFTWARE AND DECISION SUPPORT: STATE OF THE ART
AND NEW PERSPECTIVES
SE Developments in Integrated Environmental Assessment
LA English
DT Article; Book Chapter
C1 [Assaf, H.] Amer Univ Beirut, Dept Civil & Environm Engn, Beirut 11072020, Lebanon.
[van Beek, E.] Univ Twente, Delft Hydraul, NL-2600 MH Delft, Netherlands.
[Borden, C.] Univ Idaho, DHI Water Environm, Boise, ID 83702 USA.
[Gijsbers, P.] WL Delft Hydraul, Inland Water Syst, NL-2600 MH Delft, Netherlands.
[Jolma, A.] Aalto Univ, Helsinki 02015, Finland.
[Kaden, S.; Kaltofen, M.] WASY GmbH, Inst Water Resources Planning & Syst Res, D-12526 Berlin, Germany.
[Labadie, J. W.] Colorado State Univ, Dept Civil & Environm Engn, Ft Collins, CO 80523 USA.
[Loucks, D. P.] Cornell Univ, Ithaca, NY 14853 USA.
[Quinn, N. W. T.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Sieber, J.] US Ctr, Stockholm Environm Inst, Somerville, NJ 02144 USA.
[Sulis, A.] Univ Cagliari, Dept Land Engn, Hydraul Sect, I-09123 Cagliari, CA, Italy.
[Wood, D. M.] Danish Hydraul Inst, Oakland, CA USA.
RP Assaf, H (reprint author), Amer Univ Beirut, Dept Civil & Environm Engn, POB 11-0236, Beirut 11072020, Lebanon.
RI Quinn, Nigel/G-2407-2015
OI Quinn, Nigel/0000-0003-3333-4763
NR 20
TC 4
Z9 4
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1574-101X
BN 978-0-08-091530-2
J9 DEV INTEG ENVIRON
PY 2008
VL 3
BP 229
EP 246
PG 18
WC Environmental Sciences; Meteorology & Atmospheric Sciences
SC Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences
GA BCO90
UT WOS:000310922300014
ER
PT S
AU Erickson, DJ
Oglesby, RJ
Elliott, S
Steffen, W
Brasseur, G
AF Erickson, D. J., III
Oglesby, R. J.
Elliott, S.
Steffen, W.
Brasseur, G.
BE Jakeman, AJ
Voinov, AA
Rizzoli, AE
Chen, SH
TI CHALLENGES IN EARTH SYSTEM MODELLING: APPROACHES AND APPLICATIONS
SO ENVIRONMENTAL MODELLING, SOFTWARE AND DECISION SUPPORT: STATE OF THE ART
AND NEW PERSPECTIVES
SE Developments in Integrated Environmental Assessment
LA English
DT Article; Book Chapter
ID PRECIPITATION PROCESSES; CLIMATE-CHANGE; SIMULATION
C1 [Erickson, D. J., III] Oak Ridge Natl Lab, Div Math & Comp Sci, Computat Earth Sci Grp, Oak Ridge, TN 37831 USA.
[Oglesby, R. J.] Univ Nebraska, Dept Geosci, Lincoln, NE 68588 USA.
[Oglesby, R. J.] Univ Nebraska, Sch Nat Resources, Lincoln, NE 68588 USA.
[Elliott, S.] Los Alamos Natl Lab, Los Alamos, NM 87505 USA.
[Steffen, W.] Australian Natl Univ, Coll Sci, Fenner Sch Environm & Soc, Canberra, ACT 0200, Australia.
[Brasseur, G.] Natl Ctr Atmospher Res, Boulder, CO 80307 USA.
RP Erickson, DJ (reprint author), Oak Ridge Natl Lab, Div Math & Comp Sci, Computat Earth Sci Grp, Oak Ridge, TN 37831 USA.
NR 19
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1574-101X
BN 978-0-08-091530-2
J9 DEV INTEG ENVIRON
PY 2008
VL 3
BP 297
EP 306
PG 10
WC Environmental Sciences; Meteorology & Atmospheric Sciences
SC Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences
GA BCO90
UT WOS:000310922300018
ER
PT J
AU Zhao, D
Chen, C
Wang, Y
Ma, W
Zhao, J
Rajh, T
Zang, L
AF Zhao, Dan
Chen, Chuncheng
Wang, Yifeng
Ma, Wanhong
Zhao, Jincai
Rajh, Tijana
Zang, Ling
TI Enhanced photocatalytic degradation of dye pollutants under visible
irradiation on Al(III)-modified TiO2: Structure, interaction, and
interfacial electron transfer
SO ENVIRONMENTAL SCIENCE & TECHNOLOGY
LA English
DT Article
ID SENSITIZED SOLAR-CELLS; BINARY METAL-OXIDES; LIGHT IRRADIATION;
PHOTOASSISTED DEGRADATION; PHOTOSENSITIZED DEGRADATION; RECOMBINATION
DYNAMICS; CHARGE RECOMBINATION; SULFORHODAMINE-B; SURFACE-ACIDITY;
RHODAMINE-B
AB Aluminum(III)-modified TiO2 was prepared by sol-gel process via a sudden gelating method. The structure of the modified material and the local environment of aluminum were investigated using X-ray diffraction, HRTEM, XpS, (27)AI MAS NMR, and xi-potential measurements. The effect of the aluminum modification on interaction between the dye and photocatalyst, the interfacial electron transfer process, and thereby the degradation of dye pollutants under visible irradiation were also examined by FIR spectra and UV-vis diffuse reflectance spectra. It was found that, rather than incorporating into the crystal lattice of TiO2, the aluminum forms an overlayer of Al2O3 on the surface of TiO2, interfaced with Ti-O-Al bonds. It is interesting that the carboxylate-containing dyes such as Rhodamine B (RhB) adsorb preferentially on the Al2O3, rather than the Ti(IV) sites on the surface of TiO2. The photodegradation rate observed for RhB is nearly 5-fold faster than that obtained in the pristine TiO2 system. The photodegradation of dyes on the aluminum(Ill)-modified photocatalyst is of great dependence on the structure and anchoring group of the dyes. Structure with carboxylate as anchoring group and amino group as electron donor is favorable for degradation. The mechanistic details are discussed on the basis of experimental results.
C1 [Zhao, Dan; Chen, Chuncheng; Wang, Yifeng; Ma, Wanhong; Zhao, Jincai] Chinese Acad Sci, Inst Chem, Key Lab Photochem, Beijing Natl Lab Mol Sci, Beijing 100080, Peoples R China.
[Rajh, Tijana] Argonne Natl Lab, Div Mat Sci, Div Chem, Argonne, IL 60439 USA.
[Zang, Ling] So Illinois Univ, Dept Chem & Biochem, Carbondale, IL 62901 USA.
RP Chen, C (reprint author), Chinese Acad Sci, Inst Chem, Key Lab Photochem, Beijing Natl Lab Mol Sci, Beijing 100080, Peoples R China.
EM jczhao@iccas.ac.cn
NR 45
TC 106
Z9 111
U1 10
U2 87
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0013-936X
J9 ENVIRON SCI TECHNOL
JI Environ. Sci. Technol.
PD JAN 1
PY 2008
VL 42
IS 1
BP 308
EP 314
DI 10.1021/es071770e
PG 7
WC Engineering, Environmental; Environmental Sciences
SC Engineering; Environmental Sciences & Ecology
GA 246WC
UT WOS:000252037400050
PM 18350913
ER
PT J
AU Mir, L
AF Mir, Laurence
TI Exposure to radio frequency radiation of AM transmitters and infantile
cancers
SO ENVIRONNEMENT RISQUES & SANTE
LA French
DT News Item
AB This case-control study in children included enough subjects to detect a carcinogenic effect of exposure to AM radio frequency radiation. It found no increased risk of brain cancer. The results about the risk of lymphoblastic leukemia do not permit any definitive conclusions.
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Indoor Environm Dept, Berkeley, CA 94720 USA.
RP Mir, L (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Indoor Environm Dept, Berkeley, CA 94720 USA.
NR 1
TC 0
Z9 0
U1 0
U2 1
PU JOHN LIBBEY EUROTEXT LTD
PI MONTROUGE
PA 127 AVE DE LA REPUBLIQUE, 92120 MONTROUGE, FRANCE
SN 1635-0421
J9 ENVIR RISQUES SANTE
PD JAN-FEB
PY 2008
VL 7
IS 1
BP 11
EP 12
PG 2
WC Public, Environmental & Occupational Health
SC Public, Environmental & Occupational Health
GA 270WX
UT WOS:000253752000007
ER
PT S
AU Russell, AM
Frerichs, AE
Gschneidner, KA
Biner, SB
Chumbley, LS
Xie, SJ
Williams, SH
Chen, Q
Becker, AT
AF Russell, Alan M.
Frerichs, Andrew E.
Gschneidner, Karl A., Jr.
Biner, S. Bulent
Chumbley, L. Scott
Xie, Sujing
Williams, Scott H.
Chen, Qian
Becker, Andrew T.
BE Howard, SM
TI Progress in understanding the high ductility of rare earth B2
(CsCI-type) intermetallics
SO EPD CONGRESS 2008
SE EPD CONGRESS
LA English
DT Proceedings Paper
CT EPD Congress 2008 held at the 2008 Annual TMS Meeting and Exhibition
CY MAR 09-13, 2008
CL New Orleans, LA
SP Minerals, Met & Mat Soc, Extract & Proc Div
DE rare earth metals; intermetallics; mechanical properties; ductility
ID INDEPENDENT SLIP SYSTEMS; NIAL SINGLE-CRYSTALS; MECHANICAL-PROPERTIES;
FRACTURE-TOUGHNESS; ROOM-TEMPERATURE; COMPOUND AGMG; PLASTIC
DEFORMATION; TENSILE DUCTILITY; ALLOYS; BEHAVIOR
AB In recent years, several rare earth intermetallic compounds with the B2-type structure have been reported to exhibit high tensile ductility and high K-IC fracture toughness at room temperature. These materials retain considerable ductility even at 77K. These are noteworthy findings because most intermetallics possess poor room temperature ductility and low fracture toughness unless one or more special contrivances are applied (e.g., doping with small additions of interstitial elements, off-stoichiometric compositions, testing in ultra-dry atmospheres, etc.). This paper summarizes recent findings on rare earth B2 intermetallics. These include the determination of the active slip systems; the strain rate sensitivities; yield strength maxima at elevated temperatures; the search for possible twinning and stress-induced phase transformations; ab initio calculations of their defect energies and the anisotropy of dislocation line tension. Potential applications of these materials and the possibilities that this study may suggest strategies for increasing ductility in other intermetallic compounds are discussed.
C1 [Russell, Alan M.] US DOE, Mat Engn Phys Program, Ames Lab, Ames, IA 50011 USA.
RP Russell, AM (reprint author), US DOE, Mat Engn Phys Program, Ames Lab, Ames, IA 50011 USA.
NR 60
TC 0
Z9 0
U1 1
U2 1
PU MINERALS, METALS & MATERIALS SOC
PI WARRENDALE
PA 184 THORN HILL RD, WARRENDALE, PA 15086-7514 USA
SN 1079-7580
BN 978-0-87339-715-5
J9 EPD CONG
PY 2008
BP 587
EP 606
PG 20
WC Engineering, Environmental; Metallurgy & Metallurgical Engineering
SC Engineering; Metallurgy & Metallurgical Engineering
GA BHQ95
UT WOS:000255551100068
ER
PT J
AU Goldfarb, NI
Bae, A
Buras, WJ
Allen, JC
Maletic-Savatic, MM
Fisher, RS
Anschel, DJ
AF Goldfarb, Noah I.
Bae, A.
Buras, W. J.
Allen, J. C.
Maletic-Savatic, M. M.
Fisher, R. S.
Anschel, D. J.
TI ANTI-EPILEPTIC PROPERTY NOT PRESENT IN RAT CEREBROSPINAL FLUID FOLLOWING
30 MINUTES OR TWO WEEKS OF VAGUS NERVE STIMULATION
SO EPILEPSIA
LA English
DT Meeting Abstract
CT 62nd Annual Meeting of the American-Epilepsy-Society
CY DEC 05-09, 2008
CL Seattle, WA
SP Amer Epilepsy Soc
C1 [Goldfarb, Noah I.; Bae, A.; Maletic-Savatic, M. M.] SUNY Stony Brook, Stony Brook, NY 11794 USA.
[Maletic-Savatic, M. M.; Anschel, D. J.] Brookhaven Natl Lab, Upton, NY 11973 USA.
[Fisher, R. S.] Stanford Univ, Stanford, CA 94305 USA.
[Anschel, D. J.] St Charles Hosp, Port Jefferson, NY USA.
NR 0
TC 0
Z9 0
U1 0
U2 2
PU WILEY-BLACKWELL PUBLISHING, INC
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0013-9580
J9 EPILEPSIA
JI Epilepsia
PY 2008
VL 49
BP 300
EP 301
PG 2
WC Clinical Neurology
SC Neurosciences & Neurology
GA 363ZS
UT WOS:000260306600719
ER
PT J
AU Andrew, Y
Hawkes, NC
Biewer, T
Crombe, K
Keeling, D
De La Luna, E
Giroud, C
Korotkov, A
Meigs, A
Murari, A
Nunes, I
Sartori, R
Tala, T
AF Andrew, Y.
Hawkes, N. C.
Biewer, T.
Crombe, K.
Keeling, D.
De La Luna, E.
Giroud, C.
Korotkov, A.
Meigs, A.
Murari, A.
Nunes, I.
Sartori, R.
Tala, T.
CA JET-EFDA Contributors
TI Evolution of the radial electric field in a JET H-mode plasma
SO EPL
LA English
DT Article
ID TRANSITION; CONFINEMENT; TOKAMAK
AB Results from recent measurements of carbon impurity ion toroidal and poloidal rotation velocities, ion temperature, ion density and the resulting radial electric field (Er) profiles are presented from an evolving Joint European Torus (JET) tokamak plasma over a range of energy and particle confinement regimes. Significant levels of edge plasma poloidal rotation velocity have been measured for the first time on JET, with maximum values of +/- 9 kms(-1). Such values of poloidal rotation provide an important contribution to the total edge plasma Er profiles. Large values of shear in the measured Er profiles are observed to arise as a consequence of the presence of the edge transport barrier (ETB) and do not appear to be necessary for their formation or destruction. These results have an important impact on potential mechanisms for transport barrier triggering and sustainment in present-day and future high-performance fusion plasmas. Copyright (c) EPLA, 2008.
C1 [Andrew, Y.; Hawkes, N. C.; Biewer, T.; Crombe, K.; Keeling, D.; De La Luna, E.; Giroud, C.; Korotkov, A.; Meigs, A.; Murari, A.; Nunes, I.; Sartori, R.; Tala, T.; JET-EFDA Contributors] Culham Sci Ctr, JET EFDA, Abingdon OX14 3DB, Oxon, England.
[Andrew, Y.; Hawkes, N. C.; Keeling, D.; Giroud, C.; Korotkov, A.; Meigs, A.] Culham Sci Ctr, UKAEA Euratom Fus Assoc, Abingdon OX14 3DB, Oxon, England.
[Biewer, T.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Crombe, K.] Univ Ghent, Dept Appl Phys, Ghent, Belgium.
[De La Luna, E.] CIEMAT, Asocias EURATOM Fus, E-28040 Madrid, Spain.
[Murari, A.] EURATOM, ENEA, Consorzio RFX, Padua, Italy.
[Nunes, I.] Ctr Fusao Nucl, Associacao EURATOM IST, Lisbon, Portugal.
[Sartori, R.] EFDA CSU, D-85748 Garching, Germany.
[Tala, T.] Assoc EURATOM Tekes, FIN-02044 Espoo, Finland.
RP Andrew, Y (reprint author), Culham Sci Ctr, JET EFDA, Abingdon OX14 3DB, Oxon, England.
RI Nunes, Isabel/D-1627-2017;
OI Nunes, Isabel/0000-0003-0542-1982
FU UK EPSRC; EC
FX This work was carried out within the framework of EFDA and was partly
funded by the UK EPSRC and EC under the contract of Association between
EURATOM/UKAEA. The views and opinions expressed herein do not
necessarily reflect those of the European Commission.
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PU EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY
PI MULHOUSE
PA 6 RUE DES FRERES LUMIERE, MULHOUSE, 68200, FRANCE
SN 0295-5075
J9 EPL-EUROPHYS LETT
JI EPL
PY 2008
VL 83
IS 1
AR 15003
DI 10.1209/0295-5075/83/15003
PG 6
WC Physics, Multidisciplinary
SC Physics
GA 345TQ
UT WOS:000259020300015
ER
PT J
AU Bobrov, NL
Chernobay, VN
Naidyuk, YG
Tyutrina, LV
Naugle, DG
Rathnayaka, KDD
Bud'ko, SL
Canfield, PC
Yanson, IK
AF Bobrov, N. L.
Chernobay, V. N.
Naidyuk, Yu. G.
Tyutrina, L. V.
Naugle, D. G.
Rathnayaka, K. D. D.
Bud'ko, S. L.
Canfield, P. C.
Yanson, I. K.
TI Competition of multiband superconducting and magnetic order in ErNi2B2C
observed by Andreev reflection
SO EPL
LA English
DT Article
ID POINT-CONTACT SPECTROSCOPY; SINGLE-CRYSTAL ERNI2B2C; ANTIFERROMAGNETIC
SUPERCONDUCTORS; BOROCARBIDES; COEXISTENCE; LUNI2B2C
AB Point contacts (PC) Andreev reflection dV/dI spectra for the antiferromagnetic (T-N similar or equal to 6K) superconductor (T-c similar or equal to 11 K) ErNi2B2C have been measured for the two main crystallographic directions. The observed retention of the Andreev reflection minima in dV/dI up to T-c directly points to an unusual superconducting order parameter (OP) vanishing at T-c. The temperature dependence of the OP was obtained from dV/dI using the recent theory of Andreev reflection including the pair-breaking effect. For the first time the existence of two superconducting OPs in ErNi2B2C is shown. A distinct decrease of both OPs as temperature is lowered below T-N is observed. Copyright (C) EPLA, 2008.
C1 [Bobrov, N. L.; Chernobay, V. N.; Naidyuk, Yu. G.; Tyutrina, L. V.; Yanson, I. K.] Natl Acad Sci Ukraine, B Verkin Inst Low Temp Phys & Engn, UA-61103 Kharkov, Ukraine.
[Naugle, D. G.; Rathnayaka, K. D. D.] Texas A&M Univ, Dept Phys, College Stn, TX 77843 USA.
[Bud'ko, S. L.; Canfield, P. C.] Iowa State Univ, Ames Lab, Dept Phys & Astron, Ames, IA 50011 USA.
RP Bobrov, NL (reprint author), Natl Acad Sci Ukraine, B Verkin Inst Low Temp Phys & Engn, 47 Lenin Ave, UA-61103 Kharkov, Ukraine.
EM naidyuk@ilt.kharkov.ua
RI Naidyuk, Yurii/B-7579-2012; Canfield, Paul/H-2698-2014;
OI Naidyuk, Yurii/0000-0001-8301-9353
NR 21
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U1 0
U2 0
PU EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY
PI MULHOUSE
PA 6 RUE DES FRERES LUMIERE, MULHOUSE, 68200, FRANCE
SN 0295-5075
EI 1286-4854
J9 EPL-EUROPHYS LETT
JI EPL
PY 2008
VL 83
IS 3
AR 37003
DI 10.1209/0295-5075/83/37003
PG 5
WC Physics, Multidisciplinary
SC Physics
GA 345UM
UT WOS:000259022600030
ER
PT J
AU Chattopadhyay, MK
Roy, SB
Morrison, K
Moore, JD
Perkins, GK
Cohen, LF
Gschneidner, KA
Pecharsky, VK
AF Chattopadhyay, M. K.
Roy, S. B.
Morrison, K.
Moore, J. D.
Perkins, G. K.
Cohen, L. F.
Gschneidner, K. A., Jr.
Pecharsky, V. K.
TI Visual evidence of the magnetic glass state and its re-crystallization
in Gd5Ge4
SO EPL
LA English
DT Article
ID PHASE-TRANSITION; LIQUIDS; GD-5(SI1.8GE2.2); GD-5(SI2GE2); BEHAVIOR;
FIELD
AB We present the results of scanning Hall probe microscopy experiments on polycrystalline Gd5Ge4 providing visual evidence of the formation of a "magnetic-glass" out of a kinetically arrested first-order antiferromagnetic-to-ferromagnetic transition. This magnetic-glass state consists of equilibrium ferromagnetic microscopic regions distributed randomly in a metastable antiferromagnetic matrix. In addition we show how the introduction of energy fluctuations in the system produces spatially dependent signs of growth of ferromagnetic phase or re-crystallization of this 'magnetic-glass'.
C1 [Chattopadhyay, M. K.; Roy, S. B.] Raja Ramanna Ctr Adv Technol, Magnet & Superconducting Mat Sect, Indore 452013, India.
[Morrison, K.; Moore, J. D.; Perkins, G. K.; Cohen, L. F.] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BZ, England.
[Gschneidner, K. A., Jr.; Pecharsky, V. K.] Iowa State Univ Sci & Technol, US DOE, Ames Lab, Ames, IA 50011 USA.
[Gschneidner, K. A., Jr.; Pecharsky, V. K.] Iowa State Univ Sci & Technol, Dept Mat Sci & Engn, Ames, IA 50011 USA.
RP Chattopadhyay, MK (reprint author), Raja Ramanna Ctr Adv Technol, Magnet & Superconducting Mat Sect, Indore 452013, India.
RI morrison, kelly/G-5249-2013
OI morrison, kelly/0000-0001-5672-3310
FU U.S. Department of Energy, Office of Basic Energy Sciences, Materials
Sciences Division [DE-AC02-07CH11358]; Iowa State University of Science
and Technology; EPSRC [EP/E016243]; Leverhulme Trust [F/07 058/V]; Royal
Society International Joint Project [20060712100544-5391-34482]
FX Work at the Ames Laboratory is supported by the U.S. Department of
Energy, Office of Basic Energy Sciences, Materials Sciences Division
under contract No. DE-AC02-07CH11358 with Iowa State University of
Science and Technology. Work at Imperial College is support by EPSRC
EP/E016243, the Leverhulme Trust F/07 058/V and the Royal Society
International Joint Project Grant 20060712100544-5391-34482.
NR 44
TC 4
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U1 0
U2 4
PU EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY
PI MULHOUSE
PA 6 RUE DES FRERES LUMIERE, MULHOUSE, 68200, FRANCE
SN 0295-5075
J9 EPL-EUROPHYS LETT
JI EPL
PY 2008
VL 83
IS 5
AR 57006
DI 10.1209/0295-5075/83/57006
PG 6
WC Physics, Multidisciplinary
SC Physics
GA 345XE
UT WOS:000259030200038
ER
PT J
AU Colakerol, L
Piper, LFJ
Fedorov, A
Chen, TC
Moustakas, TD
Smith, KE
AF Colakerol, L.
Piper, L. F. J.
Fedorov, A.
Chen, T. C.
Moustakas, T. D.
Smith, K. E.
TI Observation of an inverted band structure near the surface of InN
SO EPL
LA English
DT Article
ID FILMS
AB The dispersion of the valence band within the electron accumulation layer of n-type InN(000 (1) over bar) has been directly measured using angle-resolved photoemission spectroscopy. Intermixing between the heavy-hole and light-hole valence bands in the intrinsic quantum well potential associated with the near-surface electron accumulation layer results in an inverted band structure, with the valence band maximum lying away from the Brillouin zone center. Such an inverted band structure has not previously been observed in an intrinsic accumulation layer. Copyright (C) EPLA, 2008.
C1 [Colakerol, L.; Piper, L. F. J.; Smith, K. E.] Boston Univ, Dept Phys, Boston, MA 02215 USA.
[Fedorov, A.] Lawrence Berkeley Natl Lab, Berkeley, CA USA.
[Chen, T. C.; Moustakas, T. D.] Boston Univ, Dept Elect & Comp Engn, Boston, MA 02215 USA.
RP Colakerol, L (reprint author), Boston Univ, Dept Phys, Boston, MA 02215 USA.
EM ksmith@bu.edu
RI Piper, Louis/C-2960-2011; Moustakas, Theodore/D-9249-2016
OI Piper, Louis/0000-0002-3421-3210; Moustakas,
Theodore/0000-0001-8556-884X
FU DOE [RF-06-PRD-001, DEAC03-76SF00098]; NSF [DMR-0311792.]
FX The authors would like to thank F. Bechstedt for fruitful discussions.
This work was supported in part by the DOE under RF-06-PRD-001
(subcontract from University of Nevada, Las Vegas), and by the NSF under
grant No. DMR-0311792. The ALS is supported by the DOE, Materials
Sciences Division under contract No. DEAC03-76SF00098.
NR 14
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U1 0
U2 9
PU EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY
PI MULHOUSE
PA 6 RUE DES FRERES LUMIERE, MULHOUSE, 68200, FRANCE
SN 0295-5075
J9 EPL-EUROPHYS LETT
JI EPL
PY 2008
VL 83
IS 4
AR 47003
DI 10.1209/0295-5075/83/47003
PG 5
WC Physics, Multidisciplinary
SC Physics
GA 345VP
UT WOS:000259025900026
ER
PT J
AU Harting, J
Herrmann, HJ
Ben-Naim, E
AF Harting, J.
Herrmann, H. J.
Ben-Naim, E.
TI Anomalous distribution functions in sheared suspensions
SO EPL
LA English
DT Article
ID DISCRETIZED BOLTZMANN-EQUATION; PARTICULATE SUSPENSIONS; NUMERICAL
SIMULATIONS; SPHERES
AB We investigate velocity probability distribution functions (PDF) of sheared hard-sphere suspensions. As observed in our Stokes flow simulations and explained by our single-particle theory, these PDFs can show pronounced deviations from a Maxwell-Boltzmann distribution. The PDFs are symmetric around zero velocity and show a Gaussian core and exponential tails over more than six orders of magnitude of probability. Following the excellent agreement of our theory and simulation data, we demonstrate that the distribution functions scale with the shear rate, the particle volume concentration, as well as the fluid viscosity. Copyright (C) EPLA, 2008.
C1 [Harting, J.] Inst Computat Phys, D-70569 Stuttgart, Germany.
[Herrmann, H. J.] ETH, IFB, CH-8093 Zurich, Switzerland.
[Ben-Naim, E.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Ben-Naim, E.] Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
RP Harting, J (reprint author), Inst Computat Phys, Pfaffenwaldring 27, D-70569 Stuttgart, Germany.
RI Ben-Naim, Eli/C-7542-2009; Harting, Jens/B-4884-2008; Sistemas
Complexos, Inct/J-8597-2013
OI Ben-Naim, Eli/0000-0002-2444-7304; Harting, Jens/0000-0002-9200-6623;
FU US-DOE [DE-AC52-06NA25396]; Landesstiftung Baden-Wurttemberg
FX We thank A. J. C. Ladd for providing his simulation code and for
fruitful discussions. This work was supported by the DFG priority
program "nano- and microfluidics", US-DOE grant DE-AC52-06NA25396, and
the "Landesstiftung Baden-Wurttemberg". HJH thanks the Max Planck prize.
We thank P L. Krapivsky for fruitful discussions and the Institute for
Pure and Applied Mathematics at University of California, Los Angeles
for hospitality. The computations were performed at the Julich
Supercomputing Centre.
NR 19
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PU EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY
PI MULHOUSE
PA 6 RUE DES FRERES LUMIERE, MULHOUSE, 68200, FRANCE
SN 0295-5075
J9 EPL-EUROPHYS LETT
JI EPL
PY 2008
VL 83
IS 3
AR 30001
DI 10.1209/0295-5075/83/30001
PG 5
WC Physics, Multidisciplinary
SC Physics
GA 345UM
UT WOS:000259022600001
ER
PT J
AU Manor, R
Hagberg, A
Meron, E
AF Manor, R.
Hagberg, A.
Meron, E.
TI Wave-number locking in spatially forced pattern-forming systems
SO EPL
LA English
DT Article
ID BANDED VEGETATION; FREQUENCY LOCKING; EXTENDED SYSTEMS; CONVECTION;
EQUILIBRIUM; DEFECTS
AB We use the Swift-Hohenberg model and normal-form equations to study wave-number locking in two-dimensional systems as a result of one-dimensional spatially periodic weak forcing. The freedom of the system to respond in a direction transverse to the forcing leads to wave-number locking in a wide range of forcing wave-numbers, even for weak forcing, unlike the locking in a set of narrow Arnold tongues in one-dimensional systems. Multi-stability ranges of stripe, rectangular, and oblique patterns produce a variety of resonant patterns. The results shed new light on rehabilitation practices of banded vegetation in drylands. Copyright (c) EPLA, 2008.
C1 [Manor, R.; Meron, E.] Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, Israel.
[Hagberg, A.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Meron, E.] Ben Gurion Univ Negev, BIDR, Dept Solar Energy & Environm Phys, IL-84990 Sede Boqer, Israel.
RP Manor, R (reprint author), Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, Israel.
EM hagberg@lanl.gov
RI MERON, EHUD/F-1810-2012
FU James S. McDonnell Foundation; Los Alamos National Laboratory
[DE-AC52-06NA25396]; DOE Office of Science Advanced Computing Research
(ASCR)
FX The support of the James S. McDonnell Foundation is gratefully
acknowledged. Part of this work was funded by the Department of Energy
at Los Alamos National Laboratory under contract DE-AC52-06NA25396, and
the DOE Office of Science Advanced Computing Research (ASCR) program in
Applied Mathematical Sciences.
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PU EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY
PI MULHOUSE
PA 6 RUE DES FRERES LUMIERE, MULHOUSE, 68200, FRANCE
SN 0295-5075
J9 EPL-EUROPHYS LETT
JI EPL
PY 2008
VL 83
IS 1
AR 10005
DI 10.1209/0295-5075/83/10005
PG 5
WC Physics, Multidisciplinary
SC Physics
GA 345TQ
UT WOS:000259020300005
ER
PT J
AU Shivamoggi, BK
AF Shivamoggi, B. K.
TI Hall resistive tearing mode: A variational formulation
SO EPL
LA English
DT Article
ID COLLISIONLESS MAGNETIC RECONNECTION; PARTICLE SIMULATIONS; EARTHS
MAGNETOTAIL; SHEET; INSTABILITIES; PLASMAS
AB A unified linear tearing-mode formulation is given incorporating both resistivity and Hall effects. A variational method is used that appears to be best suited to deal with the difficulties peculiar to the triple-deck structure associated with the Hall resistive tearing mode but also to lead to a convenient analytical dispersion relation for the Hall resisitive tearing mode. This analytical dispersion relation: a) recovers the Furth-Killeen-Rosenbluth (Phys. Fluids, 6 (1963) 459) result for the resistive branch; b) gives a growth rate for the Hall branch which appears to be consistent with the growth rate of the electron-inertia-driven tearing mode given previously (Coppi B., Phys. Lett. A, 11 (1964) 226); c) recovers the scaling relation for the transition from the resisitive regime to the Hall regime numerically established by Fitzpatrick (Phys. Plasmas, 11 (2004) 937) in a driven Hall resistive reconnection situation. Copyright (c) EPLA, 2008.
C1 [Shivamoggi, B. K.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Shivamoggi, BK (reprint author), Univ Cent Florida, Orlando, FL 32816 USA.
EM bhimsens@mail.ucf.edu
NR 25
TC 3
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U1 0
U2 0
PU EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY
PI MULHOUSE
PA 6 RUE DES FRERES LUMIERE, MULHOUSE, 68200, FRANCE
SN 0295-5075
J9 EPL-EUROPHYS LETT
JI EPL
PY 2008
VL 83
IS 5
AR 55002
DI 10.1209/0295-5075/83/55002
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 345XE
UT WOS:000259030200022
ER
PT J
AU Rullier-Albenque, F
Alloul, H
Balakirev, F
Proust, C
AF Rullier-Albenque, F.
Alloul, H.
Balakirev, F.
Proust, C.
TI Disorder, metal-insulator crossover and phase diagram in high-T(c)
cuprates
SO EPL
LA English
DT Article
ID NORMAL-STATE; MAGNETIC-FIELDS; SUPERCONDUCTOR; PSEUDOGAP; LA2-XSRXCUO4;
IRRADIATION; DEPRESSION; ORDER
AB We have studied the influence of disorder induced by electron irradiation on the normal-state resistivities rho(T) of optimally and underdoped YBa(2)Cu(3)O(x) single crystals, using pulsed magnetic fields up to 60T to completely restore the normal state. We evidence that point defect disorder induces low-T upturns of rho(T) which saturate in some cases at low T in large applied fields as would be expected for a Kondo-like magnetic response. Moreover, the magnitude of the upturns is related to the residual resistivity, that is to the concentration of defects and/ or their nanoscale morphology. These upturns are found quantitatively identical to those reported in lower-Tc cuprates, which establishes the importance of disorder in these supposedly pure compounds. We therefore propose a realistic phase diagram of the cuprates, including disorder, in which the superconducting state might reach the antiferromagnetic phase in the clean limit. Copyright (C) EPLA, 2008
C1 [Rullier-Albenque, F.] CEA Saclay, CNRS, URA 2464, Serv Phys Etat Condense, F-91191 Gif Sur Yvette, France.
[Alloul, H.] Univ Paris 11, CNRS, UMR 8502, Phys Solides Lab, F-91405 Orsay, France.
[Balakirev, F.] Los Alamos Natl Lab, Natl High Magnet Field Lab, Los Alamos, NM 87545 USA.
[Proust, C.] CNRS, UMR 5147, UPS, INSA,Lab Natl Champs Magnet Pulses, Toulouse, France.
RP Rullier-Albenque, F (reprint author), CEA Saclay, CNRS, URA 2464, Serv Phys Etat Condense, F-91191 Gif Sur Yvette, France.
EM florence.albenque-rullier@cea.fr
NR 35
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U1 0
U2 11
PU EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY
PI MULHOUSE
PA 6 RUE DES FRERES LUMIERE, MULHOUSE, 68200, FRANCE
SN 0295-5075
J9 EPL-EUROPHYS LETT
JI EPL
PY 2008
VL 81
IS 3
AR 37008
DI 10.1209/0295-5075/81/37008
PG 6
WC Physics, Multidisciplinary
SC Physics
GA 258QY
UT WOS:000252884300028
ER
PT J
AU Rybin, AV
Vadeiko, IP
Bishop, AR
AF Rybin, A. V.
Vadeiko, I. P.
Bishop, A. R.
TI Slow-light solitons: Influence of relaxation
SO EPL
LA English
DT Article
ID ELECTROMAGNETICALLY INDUCED TRANSPARENCY; ATOMIC MEDIUM; PULSES;
MANIPULATION; STORAGE
AB We have applied the transformation of the slow-light equations to the Liouville theory that we developed in our previous work, to study the influence of relaxation on the soliton dynamics. We solved the problem of the soliton dynamics in the presence of relaxation and found that the spontaneous emission from the upper atomic level is strongly suppressed. Our solution proves that the spatial shape of the soliton is well preserved even if the relaxation time is much shorter than the soliton time length. This fact is of great importance for applications of the slow-light soliton concept in optical information processing. We also demonstrate that relaxation plays a role of resistance to the soliton motion and slows the soliton down even if the controlling field is constant. Copyright (C) EPLA, 2008.
C1 [Rybin, A. V.] Univ Jyvaskyla, Dept Phys, FIN-40351 Jyvaskyla, Finland.
[Rybin, A. V.] St Petersburg Univ Informat Technol Mech & Opt, St Petersburg 197101, Russia.
[Vadeiko, I. P.] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada.
[Bishop, A. R.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Bishop, A. R.] Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
RP Rybin, AV (reprint author), Univ Jyvaskyla, Dept Phys, POB 35, FIN-40351 Jyvaskyla, Finland.
EM andrei.rybin@phys.jyu.fi; vadeiko@physics.mcgill.ca; arb@lanl.gov
NR 15
TC 0
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U1 0
U2 1
PU EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY
PI MULHOUSE
PA 6 RUE DES FRERES LUMIERE, MULHOUSE, 68200, FRANCE
SN 0295-5075
J9 EPL-EUROPHYS LETT
JI EPL
PY 2008
VL 81
IS 4
AR 40009
DI 10.1209/0295-5075/81/40009
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 258RA
UT WOS:000252884600009
ER
PT J
AU Corbett, CL
Beyah, RA
Copeland, JA
AF Corbett, Cherita L.
Beyah, Raheem A.
Copeland, John A.
TI Passive classification of wireless NICs during rate switching
SO EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING
LA English
DT Article
AB Computer networks have become increasingly ubiquitous. However, with the increase in networked applications, there has also been an increase in difficulty to manage and secure these networks. The proliferation of 802.11 wireless networks has heightened this problem by extending networks beyond physical boundaries. We propose the use of spectral analysis to identify the type of wireless network interface card (NIC). This mechanism can be applied to support the detection of unauthorized systems that use NICs which are different from that of a legitimate system. We focus on rate switching, a vaguely specified mechanism required by the 802.11 standard that is implemented in the hardware and software of the wireless NIC. We show that the implementation of this function influences the transmission patterns of a wireless stream, which are observable through traffic analysis. Our mechanism for NIC identification uses signal processing to analyze the periodicity embedded in the wireless traffic caused by rate switching. A stable spectral profile is created from the periodic components of the traffic and used for the identity of the wireless NIC. We show that we can distinguish between NICs manufactured by different vendors and NICs manufactured by the same vendor using their spectral profiles. Copyright (C) 2008.
C1 [Beyah, Raheem A.] Georgia State Univ, Dept Comp Sci, Commun Assurance & Performance Grp, Atlanta, GA 30303 USA.
[Corbett, Cherita L.] Sandia Natl Labs, Comp & Network Secur Grp, Livermore, CA 94550 USA.
[Copeland, John A.] Georgia Inst Technol, Sch Elect & Comp Engn, Commun Syst Ctr, Atlanta, GA 30308 USA.
RP Beyah, RA (reprint author), Georgia State Univ, Dept Comp Sci, Commun Assurance & Performance Grp, 34 Peachtree St,Suite 1451, Atlanta, GA 30303 USA.
EM rbeyah@cs.gsu.edu
NR 19
TC 2
Z9 2
U1 0
U2 1
PU HINDAWI PUBLISHING CORPORATION
PI NEW YORK
PA 410 PARK AVENUE, 15TH FLOOR, #287 PMB, NEW YORK, NY 10022 USA
SN 1687-1499
J9 EURASIP J WIREL COMM
JI EURASIP J. Wirel. Commun. Netw.
PY 2008
AR 495070
DI 10.1155/2008/495070
PG 12
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA 279FI
UT WOS:000254340100001
ER
PT J
AU Deaton, JD
AF Deaton, Juan D.
TI High Altitude Platforms for Disaster Recovery: Capabilities, Strategies,
and Techniques for Emergency Telecommunications
SO EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING
LA English
DT Article
AB Natural disasters and terrorist acts have significant potential to disrupt emergency communication systems. These emergency communication networks include first-responder, cellular, landline, and emergency answering services such as 911, 112, or 999. Without these essential emergency communications capabilities, search, rescue, and recovery operations during a catastrophic event will be severely debilitated. High altitude platforms could be fitted with telecommunications equipment and used to support these critical communications missions once the catastrophic event occurs. With the ability to be continuously on station, HAPs provide excellent options for providing emergency coverage over high-risk areas before catastrophic incidents occur. HAPs could also provide enhanced 911 capabilities using either GPS or reference stations. This paper proposes potential emergency communications architecture and presents a method for estimating emergency communications systems traffic patterns for a catastrophic event. Copyright (C) 2008 Juan D. Deaton.
C1 Idaho Natl Lab, Homeland Secur Directorate, Idaho Falls, ID 83415 USA.
RP Deaton, JD (reprint author), Idaho Natl Lab, Homeland Secur Directorate, Idaho Falls, ID 83415 USA.
EM juan.deaton@inl.gov
NR 19
TC 6
Z9 6
U1 0
U2 1
PU HINDAWI PUBLISHING CORPORATION
PI NEW YORK
PA 410 PARK AVENUE, 15TH FLOOR, #287 PMB, NEW YORK, NY 10022 USA
SN 1687-1499
J9 EURASIP J WIREL COMM
JI EURASIP J. Wirel. Commun. Netw.
PY 2008
AR 153469
DI 10.1155/2008/153469
PG 8
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA 367UE
UT WOS:000260577300001
ER
PT S
AU Bhatia, N
Vetter, JS
AF Bhatia, Nikhil
Vetter, Jeffrey S.
BE Bouge, L
Forsell, M
Traff, JL
Streit, A
Ziegler, W
Alexander, M
Childs, S
TI Virtual cluster management with Xen
SO EURO-PAR 2007 WORKSHOPS: PARALLEL PROCESSING
SE LECTURE NOTES IN COMPUTER SCIENCE
LA English
DT Proceedings Paper
CT 13th International Euro-Par Conference on Parallel Processing
CY AUG 28-31, 2007
CL Rennes, FRANCE
SP Int Federat Informat Proc, ACM
AB Recently, virtualization of hardware resources to run multiple instances of independent virtual machines over physical hosts has gained popularity due to an industry-wide focus on the need to reduce the cost of operation of an enterprise computing infrastructure. Xen is an open source hypervisor that provides a virtual machine abstraction layer which is very similar to the underlying physical machine. Using multiple physical hosts, each hosting multiple virtual machines over a VMM like Xen, system administrators can setup a high-availability virtual cluster to meet the ever-increasing demands of their data centers. In such an environment, the Xen hypervisor enables live migration of individual virtual machine instances from one physical node to another without significantly affecting the performance of the applications running on a target virtual machine. This paper describes a scalable Virtual Cluster Manager that provides such application agnostic cluster management capabilities to the system administrators maintaining virtual clusters over Xen powered virtual nodes.
C1 [Bhatia, Nikhil; Vetter, Jeffrey S.] Oak Ridge Natl Lab, Div Math & Comp Sci, Future Technol Grp, Oak Ridge, TN 37831 USA.
RP Bhatia, N (reprint author), Oak Ridge Natl Lab, Div Math & Comp Sci, Future Technol Grp, Oak Ridge, TN 37831 USA.
NR 6
TC 3
Z9 3
U1 0
U2 2
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0302-9743
BN 978-3-540-78472-2
J9 LECT NOTES COMPUT SC
PY 2008
VL 4854
BP 185
EP 194
PG 10
WC Computer Science, Theory & Methods
SC Computer Science
GA BHL07
UT WOS:000253962000023
ER
PT S
AU Yu, WK
Oral, HS
Canon, RS
Vetter, JS
Sankaran, R
AF Yu, Weikuan
Oral, H. Sarp
Canon, R. Shane
Vetter, Jeffrey S.
Sankaran, Ramanan
BE Luque, E
Margalef, T
Benitez, D
TI Empirical analysis of a large-scale hierarchical storage system
SO EURO-PAR 2008 PARALLEL PROCESSING, PROCEEDINGS
SE LECTURE NOTES IN COMPUTER SCIENCE
LA English
DT Proceedings Paper
CT 14th International Euro-Par Conference
CY AUG 26-29, 2008
CL Las Palmas de Gran Canaria, SPAIN
AB To prepare for future peta- or exa-scale computing, it is important to gain a good understanding on what impacts a hierarchical storage system would have on the performance of data-intensive applications, and accordingly, how to leverage its strengths and mitigate possible risks. To this aim, this paper adopts a user-level perspective to empirically reveal the implications of storage organization to parallel programs running on Jaguar at the Oak Ridge National Laboratory. We first describe the hierarchical configuration of Jaguar's storage system. Then we evaluate the performance of individual storage components. In addition, we examine the scalability of metadata- and data-intensive benchmarks over Jaguar. We have discovered that the file distribution pattern can impact the aggregated I/O bandwidth. Based on our analysis, we have demonstrated that it is possible to improve (he scalability of a representative application S3D by as Much as 15%.
C1 [Yu, Weikuan; Oral, H. Sarp; Canon, R. Shane; Vetter, Jeffrey S.; Sankaran, Ramanan] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Yu, WK (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RI Sankaran, Ramanan/D-9254-2015
OI Sankaran, Ramanan/0000-0002-5352-9915
NR 14
TC 3
Z9 4
U1 0
U2 2
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0302-9743
BN 978-3-540-85450-0
J9 LECT NOTES COMPUT SC
PY 2008
VL 5168
BP 130
EP 140
PG 11
WC Computer Science, Hardware & Architecture; Computer Science, Theory &
Methods
SC Computer Science
GA BIF29
UT WOS:000259084900012
ER
PT S
AU Piernas, J
Nieplocha, J
AF Piernas, Juan
Nieplocha, Jarek
BE Luque, E
Margalef, T
Benitez, D
TI Efficient management of complex striped files in active storage
SO EURO-PAR 2008 PARALLEL PROCESSING, PROCEEDINGS
SE Lecture Notes in Computer Science
LA English
DT Proceedings Paper
CT 14th International Euro-Par Conference on Parallel Computing
CY AUG 26-29, 2008
CL Las Palmas de Gran Canaria, SPAIN
AB Active Storage provides an opportunity for reducing the bandwidth requirements between the storage and compute elements of current; supercomputing systems, and leveraging the processing power of the storage nodes used by some modern file systems. To achieve both objectives, Active Storage allows certain processing tasks to be performed directly oil the storage nodes, near the data they manage. However, Active Storage must also support key requirements of scientific applications. In particular, Active Storage must be able to support striped files and files with complex formats (e.g., netCDF). In this paper, we describe how these important requirements can be addressed. The experimental results oil a Lustre file system riot only show that our proposal call reduce the network traffic to near zero and scale the performance with the number of storage nodes, but also that it provides ail efficient treatment, of striped files and call manage files with complex data structures.
C1 [Piernas, Juan; Nieplocha, Jarek] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Piernas, J (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA.
EM piernas@ditec.um.es; jarek.nieplocha@pnl.gov
NR 16
TC 1
Z9 1
U1 0
U2 0
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0302-9743
BN 978-3-540-85450-0
J9 LECT NOTES COMPUT SC
PY 2008
VL 5168
BP 676
EP 685
PG 10
WC Computer Science, Hardware & Architecture; Computer Science, Theory &
Methods
SC Computer Science
GA BIF29
UT WOS:000259084900063
ER
PT S
AU Sancho, JC
Kerbyson, DJ
AF Sancho, Jose Carlos
Kerbyson, Darren J.
BE Luque, E
Margalef, T
Benitez, D
TI Improving the performance of multiple conjugate gradient solvers by
exploiting overlap
SO EURO-PAR 2008 PARALLEL PROCESSING, PROCEEDINGS
SE LECTURE NOTES IN COMPUTER SCIENCE
LA English
DT Proceedings Paper
CT 14th International Euro-Par Conference
CY AUG 26-29, 2008
CL Las Palmas de Gran Canaria, SPAIN
AB Conjugate gradient solvers are often being the most, time-consuming part of many scientific applications. These solvers exhibit communications operations that, call prevent, high performance from being achieved at large scale systems. In this paper we present a novel technique to boost the performance of these solvers. In this technique multiple independent solvers that occur in some applications are combined allowing for the overlapping many communications with other communication and computation resulting with increased performance. This work is the first time that combination of CC solvers is exploited and offers performance improvements which may be particularly important in very large-scale systems. Results are presented for the MIMD Lattice (MILC) application and show that, the cost of collective communications can be reduced by a factor of 2.5x. Moreover the performance of MILC is significantly improved, by over 10% for typical lattice sizes on a 1,024-processor system.
C1 [Sancho, Jose Carlos; Kerbyson, Darren J.] Los Alamos Natl Lab, PAL, Los Alamos, NM 87545 USA.
RP Sancho, JC (reprint author), Los Alamos Natl Lab, PAL, Los Alamos, NM 87545 USA.
RI Sancho, Jose Carlos/B-3125-2016
OI Sancho, Jose Carlos/0000-0002-6917-9155
NR 11
TC 2
Z9 2
U1 0
U2 0
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0302-9743
BN 978-3-540-85450-0
J9 LECT NOTES COMPUT SC
PY 2008
VL 5168
BP 688
EP 697
PG 10
WC Computer Science, Hardware & Architecture; Computer Science, Theory &
Methods
SC Computer Science
GA BIF29
UT WOS:000259084900064
ER
PT J
AU Novak, P
Kruppa, GH
AF Novak, Petr
Kruppa, Gary H.
TI Intra-molecular cross-linking of acidic residues for protein structure
studies
SO EUROPEAN JOURNAL OF MASS SPECTROMETRY
LA English
DT Article
DE top-down; FT-MS; solvent accessibility; proteins; chemical cross-linking
ID TRANSFORM MASS-SPECTROMETRY; TOP-DOWN APPROACH; REAGENTS
AB Intra-molecular cross-Linking has been suggested as a method of obtaining distance constraints that would help to develop structural models of proteins. Recent work published on intra-molecular cross-Linking for protein structural studies has employed commercially available primary amine (lysine, the amino terminus) selective reagents. Previous work using these cross-linkers has shown that for several proteins of known structure, the number of cross-links that can be obtained experimentally may be small compared to what would be expected from the known structure, due to the relative reactivity, distribution and solvent accessibility of the lysines in the protein sequence. To overcome these limitations, we have investigated the use of cross-linking reagents that can react with other reactive side chains in proteins. We used 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride (EDC) to activate the carboxylic acid containing residues, aspartic acid (D), glutamic acid (E) and the carboxy terminus (0), for cross-linking reactions. Once activated, the DEO side chains can react to form "zero-length" cross-links with nearby primary amine containing residues, lysines (K) and the amino terminus [XI, via the formation of a new amide bond. We also show that the EDC-activated DEO side chains can be cross-linked to each other using dihydrazides, two hydrazide moieties connected by an alkyl cross-linker arm of variable length. Using these reagents, we have found three new "zero-length" cross-links in ubiquitin consistent with its known structure (M1-E16, M1-E18 and K63-E64). Using the dihydrazide cross-tinkers, we have identified two new cross-links (D21-D32 and E24-D32) unambiguously. Using a Library of dihydrazide cross-linkers with varying arm length, we have shown that there is a minimum arm Length required for the DEO-DEO cross-Links of 5.8 angstrom. These results show that additional structural information can be obtained by exploiting new cross-tinker chemistry, increasing the probability that the protein target will yield sufficient distance constraints to develop a structural model.
C1 [Novak, Petr] Acad Sci Czech Republic, Inst Microbiol, CZ-14220 Prague 4, Czech Republic.
[Novak, Petr; Kruppa, Gary H.] Sandia Natl Labs, Livermore, CA 94551 USA.
[Kruppa, Gary H.] Bruker Daltonics Inc, Billerica, MA 01821 USA.
RP Novak, P (reprint author), Acad Sci Czech Republic, Inst Microbiol, CZ-14220 Prague 4, Czech Republic.
EM pnovak@biomed.cas.cz
RI Novak, Petr/F-9655-2014
OI Novak, Petr/0000-0001-8688-529X
FU Laboratory Directed Research and Development program at Sandia National
Laboratories; Sandia Corporation; Lockheed Martin Company for the United
States Department of Energy [DE-AC04-94AL85000]; IMIC institutional
research concept [AVOZ50200510]; Ministry of Education, Youth and Sports
of the Czech Republic [LC 545]
FX This work was supported by the Laboratory Directed Research and
Development program at Sandia National Laboratories, which is a
multi-program laboratory operated by Sandia Corporation, a Lockheed
Martin Company for the United States Department of Energy under contract
DE-AC04-94AL85000. IMIC institutional research concept [AVOZ50200510]
and the Ministry of Education, Youth and Sports of the Czech Republic
[LC 545) are gratefully acknowledged for support as well.
NR 16
TC 21
Z9 21
U1 0
U2 18
PU IM PUBLICATIONS
PI W SUSSEX
PA 6 CHARLTON MILL, CHARLTON, CHICHESTER,, W SUSSEX PO18 0HY, ENGLAND
SN 1469-0667
J9 EUR J MASS SPECTROM
JI Eur. J. Mass Spectrom.
PY 2008
VL 14
IS 6
BP 355
EP 365
DI 10.1255/ejms.963
PG 11
WC Physics, Atomic, Molecular & Chemical; Spectroscopy
SC Physics; Spectroscopy
GA 399PZ
UT WOS:000262813100004
PM 19136724
ER
PT J
AU Kolesov, BA
Lager, GA
Schultz, AJ
AF Kolesov, Boris A.
Lager, George A.
Schultz, Arthur J.
TI Behaviour of H2O and OH in lawsonite: a single-crystal neutron
diffraction and Raman spectroscopic investigation
SO EUROPEAN JOURNAL OF MINERALOGY
LA English
DT Article; Proceedings Paper
CT 6th European Conference on Mineralogy and Spectroscopy
CY SEP, 2007
CL Stockholm, SWEDEN
DE lawsonite; high-pressure silicates; H2O molecule; hydroxyl groups;
hydrogen bonding; Raman spectroscopy; neutron diffraction
ID TEMPERATURE PHASE-TRANSITIONS; MINERALS
AB Neutron diffraction and polarized single-crystal Raman spectroscopic measurements were made on the high-pressure silicate lawsonite, CaAl2(Si2O7)(OH)(2)center dot H2O, from Tiburon Peninsula, California. For the diffraction measurements, intensity reflection data were collected at temperatures of 295, 110 and 20 K using time-of-flight neutron diffraction methods to further examine two reversible, order-disorder type phase transitions occurring at 273 and 155 K [Cmcm (> 273 K) -> Pmcn (< 273 K) -> P2(1) cn (< 155 K)]. These data are also used to model the H atom displacements in lawsonite as a function of temperature and to provide better insight into the nature of H bonding. The Raman spectroscopic measurements (2500 to 4000 cm(-1) at 4 <= T <= 300 K) were carried out on the same crystal used for the neutron diffraction study. Four OH-related bands are observed between 2700 and 3600 cm(-1). The OH groups and H2O molecules, which are linked by hydrogen bonding, build quasi one-dimensional chains in lawsonite, that run parallel to [001] and thus a model consisting of isolated oscillators cannot be used to interpret the spectra at ambient temperature. A notable feature of spectral behaviour at 240-260 K in the vicinity of the Cincin double left right arrow Pmcn phase transition is the change-over of strong hydrogen bonding from the OH group to the H2O molecule. The lowest-wavenumber OH(H2O) band at 2780 cm(-1) at 4 K is broad and asymmetric, which is related to strong hydrogen bonding, and is characterized by strong anharmonicity. This band was deconvoluted into a number of combination modes consisting of an internal-H2O and various external-H2O vibrations.
C1 Russian Acad Sci, Inst Inorgan Chem, Novosibirsk 630090, Russia.
Univ Louisville, Dept Geog & Geosci, Louisville, KY 40292 USA.
Argonne Natl Lab, Intense Pulsed Neutron Source, Argonne, IL 60439 USA.
RP Kolesov, BA (reprint author), Russian Acad Sci, Inst Inorgan Chem, Lavrentiev prosp 3, Novosibirsk 630090, Russia.
EM kolesov@che.nsk.su
NR 15
TC 7
Z9 7
U1 2
U2 15
PU E SCHWEIZERBARTSCHE VERLAGS
PI STUTTGART
PA NAEGELE U OBERMILLER, SCIENCE PUBLISHERS, JOHANNESSTRASSE 3A, D 70176
STUTTGART, GERMANY
SN 0935-1221
J9 EUR J MINERAL
JI Eur. J. Mineral.
PD JAN-FEB
PY 2008
VL 20
IS 1
BP 63
EP 72
DI 10.1127/0935-1221/2008/0020-1781
PG 10
WC Mineralogy
SC Mineralogy
GA 277YG
UT WOS:000254250000004
ER
PT J
AU Abdullin, S
Abramov, V
Acharya, B
Adams, M
Akchurin, N
Akgun, U
Anderson, EW
Antchev, G
Arcidy, M
Ayan, S
Aydin, S
Baarmand, M
Babich, K
Baden, D
Bakirci, MN
Banerjee, S
Banerjee, S
Bard, R
Barnes, V
Bawa, H
Baiatian, G
Bencze, G
Beri, S
Bhatnagar, V
Bodek, A
Budd, H
Burchesky, K
Camporesi, T
Cankocak, K
Carrell, K
Cerci, S
Chendvankar, S
Chung, Y
Cremaldi, L
Cushman, P
Damgov, J
de Barbaro, P
Deliomeroglu, M
Demianov, A
de Visser, T
Dimitrov, L
Dindar, K
Dugad, S
Dumanoglu, I
Duru, F
Elias, J
Elvira, D
Emeliantchik, I
Eno, S
Eskut, E
Fenyvesi, A
Fisher, W
Freeman, J
Gamsizkan, H
Gavrilov, V
Genchev, V
Gershtein, Y
Golutvin, I
Goncharov, P
Grassi, T
Green, D
Gribushin, A
Grinev, B
Gulmez, E
Gumus, K
Haelen, T
Hagopian, S
Hagopian, V
Hashemi, M
Hauptman, J
Hazen, E
Heering, A
Ilyina, N
Isiksal, E
Jarvis, C
Johnson, K
Kaftanov, V
Kalagin, V
Kalinin, A
Karmgard, D
Kalmani, S
Katta, S
Kaur, M
Kaya, M
Kayis-Topaksu, A
Kellogg, R
Khmelnikov, A
Kim, H
Kisselevich, I
Kodolova, O
Kohli, J
Kolossov, V
Korablev, A
Korneev, Y
Kosarev, I
Koylu, S
Kramer, L
Krinitsyn, A
Krokhotin, A
Kryshkin, V
Kuleshov, S
Kumar, A
Kunori, S
Kurt, P
Kuzucu-Polatoz, A
Laasanen, A
Ladygin, V
Laszlo, A
Lawlor, C
Lazic, D
Levchuk, L
Linn, S
Litvintsev, D
Litov, L
Los, S
Lubinsky, V
Lukanin, V
Ma, Y
Machado, E
Mans, J
Markowitz, P
Massolov, V
Martinez, G
Mazumdar, K
Merlo, JP
Mermerkaya, H
Mescheryakov, G
Mestvirishvili, A
Miller, M
Mohammadi-Najafabadi, M
Moissenz, P
Mondal, N
Nagaraj, P
Norbeck, E
Olson, J
Onel, Y
Onengut, G
Ozdes-Koca, N
Ozkan, C
Ozkurt, H
Ozkorucuklu, S
Paktinat, S
Pal, A
Patil, M
Penzo, A
Petrushanko, S
Petrosyan, A
Pikalov, V
Piperov, S
Podrasky, V
Pompos, A
Posch, C
Qiang, W
Reddy, L
Reidy, J
Ruchti, R
Rogalev, E
Rohlf, J
Ronzhin, A
Ryazanov, A
Safronov, G
Sanders, DA
Sanzeni, C
Sarycheva, L
Satyanarayana, B
Schmidt, I
Sekmen, S
Semenov, S
Senchishin, V
Sergeyev, S
Serin-Zeyrek, M
Sever, R
Singh, J
Sirunyan, A
Skuja, A
Sharma, S
Sherwood, B
Shumeiko, N
Smirnov, V
Sogut, K
Sorokin, P
Spezziga, M
Stefanovich, R
Stolin, V
Sulak, L
Suzuki, I
Talov, V
Teplov, K
Thomas, R
Topakli, H
Tully, C
Turchanovich, L
Ulyanov, A
Vankov, I
Vardanyan, I
Varela, F
Vergili, M
Verma, P
Vesztergombi, G
Vidal, R
Vishnevskiy, A
Vlassov, E
Vodopiyanov, I
Volkov, A
Volodko, A
Wang, L
Wetstein, M
Winn, D
Wigmans, R
Whitmore, J
Wu, SX
Yazgan, E
Yershov, A
Yetkin, T
Zalan, P
Zarubin, A
Zeyrek, M
AF Abdullin, S.
Abramov, V.
Acharya, B.
Adams, M.
Akchurin, N.
Akgun, U.
Anderson, E. W.
Antchev, G.
Arcidy, M.
Ayan, S.
Aydin, S.
Baarmand, M.
Babich, K.
Baden, D.
Bakirci, M. N.
Banerjee, Sud.
Banerjee, Sun.
Bard, R.
Barnes, V.
Bawa, H.
Baiatian, G.
Bencze, G.
Beri, S.
Bhatnagar, V.
Bodek, A.
Budd, H.
Burchesky, K.
Camporesi, T.
Cankocak, K.
Carrell, K.
Cerci, S.
Chendvankar, S.
Chung, Y.
Cremaldi, L.
Cushman, P.
Damgov, J.
de Barbaro, P.
Deliomeroglu, M.
Demianov, A.
de Visser, T.
Dimitrov, L.
Dindar, K.
Dugad, S.
Dumanoglu, I.
Duru, F.
Elias, J.
Elvira, D.
Emeliantchik, I.
Eno, S.
Eskut, E.
Fenyvesi, A.
Fisher, W.
Freeman, J.
Gamsizkan, H.
Gavrilov, V.
Genchev, V.
Gershtein, Y.
Golutvin, I.
Goncharov, P.
Grassi, T.
Green, D.
Gribushin, A.
Grinev, B.
Guelmez, E.
Guemues, K.
Haelen, T.
Hagopian, S.
Hagopian, V.
Hashemi, M.
Hauptman, J.
Hazen, E.
Heering, A.
Ilyina, N.
Isiksal, E.
Jarvis, C.
Johnson, K.
Kaftanov, V.
Kalagin, V.
Kalinin, A.
Karmgard, D.
Kalmani, S.
Katta, S.
Kaur, M.
Kaya, M.
Kayis-Topaksu, A.
Kellogg, R.
Khmelnikov, A.
Kim, H.
Kisselevich, I.
Kodolova, O.
Kohli, J.
Kolossov, V.
Korablev, A.
Korneev, Y.
Kosarev, I.
Koylu, S.
Kramer, L.
Krinitsyn, A.
Krokhotin, A.
Kryshkin, V.
Kuleshov, S.
Kumar, A.
Kunori, S.
Kurt, P.
Kuzucu-Polatoz, A.
Laasanen, A.
Ladygin, V.
Laszlo, A.
Lawlor, C.
Lazic, D.
Levchuk, L.
Linn, S.
Litvintsev, D.
Litov, L.
Los, S.
Lubinsky, V.
Lukanin, V.
Ma, Y.
Machado, E.
Mans, J.
Markowitz, P.
Massolov, V.
Martinez, G.
Mazumdar, K.
Merlo, J. P.
Mermerkaya, H.
Mescheryakov, G.
Mestvirishvili, A.
Miller, M.
Mohammadi-Najafabadi, M.
Moissenz, P.
Mondal, N.
Nagaraj, P.
Norbeck, E.
Olson, J.
Onel, Y.
Onengut, G.
Ozdes-Koca, N.
Ozkan, C.
Ozkurt, H.
Ozkorucuklu, S.
Paktinat, S.
Pal, A.
Patil, M.
Penzo, A.
Petrushanko, S.
Petrosyan, A.
Pikalov, V.
Piperov, S.
Podrasky, V.
Pompos, A.
Posch, C.
Qiang, W.
Reddy, L.
Reidy, J.
Ruchti, R.
Rogalev, E.
Rohlf, J.
Ronzhin, A.
Ryazanov, A.
Safronov, G.
Sanders, D. A.
Sanzeni, C.
Sarycheva, L.
Satyanarayana, B.
Schmidt, I.
Sekmen, S.
Semenov, S.
Senchishin, V.
Sergeyev, S.
Serin-Zeyrek, M.
Sever, R.
Singh, J.
Sirunyan, A.
Skuja, A.
Sharma, S.
Sherwood, B.
Shumeiko, N.
Smirnov, V.
Sogut, K.
Sorokin, P.
Spezziga, M.
Stefanovich, R.
Stolin, V.
Sulak, L.
Suzuki, I.
Talov, V.
Teplov, K.
Thomas, R.
Topakli, H.
Tully, C.
Turchanovich, L.
Ulyanov, A.
Vankov, I.
Vardanyan, I.
Varela, F.
Vergili, M.
Verma, P.
Vesztergombi, G.
Vidal, R.
Vishnevskiy, A.
Vlassov, E.
Vodopiyanov, I.
Volkov, A.
Volodko, A.
Wang, L.
Wetstein, M.
Winn, D.
Wigmans, R.
Whitmore, J.
Wu, S. X.
Yazgan, E.
Yershov, A.
Yetkin, T.
Zalan, P.
Zarubin, A.
Zeyrek, M.
CA Collaboration, CH
TI Design, performance, and calibration of CMS forward calorimeter wedges
SO EUROPEAN PHYSICAL JOURNAL C
LA English
DT Article
ID QUARTZ-FIBER CALORIMETER; TEST BEAM; PROTOTYPE; SIMULATION; RADIATION
AB We report on the test beam results and calibration methods using high energy electrons, pions and muons with the CMS forward calorimeter (HF). The HF calorimeter covers a large pseudorapidity region (3 <= vertical bar eta vertical bar <= 5), and is essential for a large number of physics channels with missing transverse energy. It is also expected to play a prominent role in the measurement of forward tagging jets in weak boson fusion channels in Higgs production. The HF calorimeter is based on steel absorber with embedded fused-silica-core optical fibers where Cherenkov radiation forms the basis of signal generation. Thus, the detector is essentially sensitive only to the electromagnetic shower core and is highly non-compensating (e/h approximate to 5). This feature is also manifest in narrow and relatively short showers compared to similar calorimeters based on ionization. The choice of fused-silica optical fibers as active material is dictated by its exceptional radiation hardness. The electromagnetic energy resolution is dominated by photoelectron statistics and can be expressed in the customary form as a/root E circle plus b. The stochastic term a is 198% and the constant term b is 9%. The hadronic energy resolution is largely determined by the fluctuations in the neutral pion production in showers, and when it is expressed as in the electromagnetic case, a = 280% and b = 11%.
C1 Univ Maryland, College Pk, MD 20742 USA.
Yerevan Phys Inst, Yerevan 375036, Armenia.
NCPHEP, Minsk, Byelarus.
Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, Sofia, Bulgaria.
Univ Sofia, BU-1126 Sofia, Bulgaria.
Res Inst Particle & Nucl Phys, KFKI RMKI, Budapest, Hungary.
ATOMKI, Debrecen, Hungary.
Panjab Univ, Chandigarh 160014, India.
Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India.
Inst Studies Theoret Phys & Math, Tehran, Iran.
Sharif Univ Technol, Tehran, Iran.
INFM, Trieste, Italy.
Joint Inst Nucl Res Dubna, Dubna, Russia.
ITEP, Moscow, Russia.
Moscow MV Lomonosov State Univ, Moscow, Russia.
IHEP, Protvino, Russia.
CERN, Geneva, Switzerland.
Cukurova Univ, Adana, Turkey.
Middle E Tech Univ, TR-06531 Ankara, Turkey.
Bogazici Univ, Istanbul, Turkey.
KIPT, Kharkov, Ukraine.
Kharkov Single Crystals Inst, UA-310141 Kharkov, Ukraine.
Iowa State Univ, Ames, IA USA.
Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
Boston Univ, Boston, MA 02215 USA.
Univ Illinois, Chicago, IL USA.
Fairfield Univ, Fairfield, CT 06430 USA.
Univ Iowa, Iowa City, IA USA.
Texas Tech Univ, Dept Phys, Lubbock, TX 79409 USA.
Florida Inst Technol, Melbourne, FL 32901 USA.
Florida Int Univ, Miami, FL 33199 USA.
Univ Minnesota, Minneapolis, MN USA.
Univ Mississippi, Oxford, MS USA.
Univ Notre Dame, Notre Dame, IN 46556 USA.
Princeton Univ, Princeton, NJ 08544 USA.
Univ Rochester, Rochester, NY USA.
Florida State Univ, Tallahassee, FL 32306 USA.
Purdue Univ, W Lafayette, IN 47907 USA.
Mugla Univ, Mugla, Turkey.
Marmara Univ, Istanbul, Turkey.
Kafkas Univ, Kars, Turkey.
Suleyman Demirel Univ, Isparta, Turkey.
RP Abdullin, S (reprint author), Univ Maryland, College Pk, MD 20742 USA.
EM Nural.Akchurin@ttu.edu
RI Kodolova, Olga/D-7158-2012; Fisher, Wade/N-4491-2013; Gribushin,
Andrei/J-4225-2012; Gulmez, Erhan/P-9518-2015; Yazgan, Efe/C-4521-2014;
Demianov, Andrei/E-4565-2012; Petrushanko, Sergey/D-6880-2012;
Vardanyan, Irina/K-7981-2012; Bheesette, Satyanarayana/A-1360-2013;
Kuleshov, Sergey/D-9940-2013; Gumus, Kazim/G-2498-2013;
OI Gulmez, Erhan/0000-0002-6353-518X; Yazgan, Efe/0000-0001-5732-7950;
Baarmand, Marc/0000-0002-9792-8619; Kuleshov,
Sergey/0000-0002-3065-326X; Gumus, Kazim/0000-0002-1450-6868; Uliyanov,
Alexey/0000-0001-6935-8949; Sogut, Kenan/0000-0002-9682-2855
NR 17
TC 28
Z9 28
U1 2
U2 18
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013 USA
SN 1434-6044
J9 EUR PHYS J C
JI Eur. Phys. J. C
PD JAN
PY 2008
VL 53
IS 1
BP 139
EP 166
DI 10.1140/epjc/s10052-007-0459-4
PG 28
WC Physics, Particles & Fields
SC Physics
GA 237NW
UT WOS:000251382800015
ER
PT J
AU Catanesi, MG
Radicioni, E
Edgecock, R
Ellis, M
Robbins, S
Soler, FJP
Goessling, C
Bunyatov, S
Krasnoperov, A
Popov, B
Serdiouk, V
Tereschenko, V
Di Capua, E
Vidal-Sitjes, G
Arce, P
Artamonov, A
Giani, S
Gilardoni, S
Gorbunov, P
Grant, A
Grossheim, A
Gruber, P
Ivanchenko, V
Kayis-Topaksu, A
Panman, J
Papadopoulos, I
Pasternak, J
Tcherniaev, E
Tsukerman, I
Veenhof, R
Wiebusch, C
Zucchelli, P
Blondel, A
Borghi, S
Campanelli, M
Morone, MC
Prior, G
Schroeter, R
Engel, R
Meurer, C
Kato, I
Gastaldi, U
Mills, GB
Graulich, JS
Gregoire, G
Kirsanov, M
Bonesini, M
Ferri, F
Paganoni, M
Paleari, F
Bagulya, A
Grichine, V
Polukhina, N
Palladino, V
Coney, L
Schmitz, D
Barr, G
De Santo, A
Pattison, C
Zuber, K
Bobisut, F
Gibin, D
Guglielmi, A
Mezzetto, M
Dumarchez, J
Vannucci, F
Dore, U
Orestano, D
Pastore, F
Tonazzo, A
Tortora, L
Booth, C
Buttar, C
Hodgson, P
Howlett, L
Bogomilov, M
Chizhov, M
Kolev, D
Tsenov, R
Piperov, S
Temnikov, P
Apollonio, M
Chimenti, P
Giannini, G
Santin, G
Burguet-Castell, J
Cervera-Villanueva, A
Gomez-Cadenas, JJ
Martin-Albo, J
Novella, P
Sorel, M
Tornero, A
AF Catanesi, M. G.
Radicioni, E.
Edgecock, R.
Ellis, M.
Robbins, S.
Soler, F. J. P.
Goessling, C.
Bunyatov, S.
Krasnoperov, A.
Popov, B.
Serdiouk, V.
Tereschenko, V.
Di Capua, E.
Vidal-Sitjes, G.
Arce, P.
Artamonov, A.
Giani, S.
Gilardoni, S.
Gorbunov, P.
Grant, A.
Grossheim, A.
Gruber, P.
Ivanchenko, V.
Kayis-Topaksu, A.
Panman, J.
Papadopoulos, I.
Pasternak, J.
Tcherniaev, E.
Tsukerman, I.
Veenhof, R.
Wiebusch, C.
Zucchelli, P.
Blondel, A.
Borghi, S.
Campanelli, M.
Morone, M. C.
Prior, G.
Schroeter, R.
Engel, R.
Meurer, C.
Kato, I.
Gastaldi, U.
Mills, G. B.
Graulich, J. S.
Gregoire, G.
Kirsanov, M.
Bonesini, M.
Ferri, F.
Paganoni, M.
Paleari, F.
Bagulya, A.
Grichine, V.
Polukhina, N.
Palladino, V.
Coney, L.
Schmitz, D.
Barr, G.
De Santo, A.
Pattison, C.
Zuber, K.
Bobisut, F.
Gibin, D.
Guglielmi, A.
Mezzetto, M.
Dumarchez, J.
Vannucci, F.
Dore, U.
Orestano, D.
Pastore, F.
Tonazzo, A.
Tortora, L.
Booth, C.
Buttar, C.
Hodgson, P.
Howlett, L.
Bogomilov, M.
Chizhov, M.
Kolev, D.
Tsenov, R.
Piperov, S.
Temnikov, P.
Apollonio, M.
Chimenti, P.
Giannini, G.
Santin, G.
Burguet-Castell, J.
Cervera-Villanueva, A.
Gomez-Cadenas, J. J.
Martin-Albo, J.
Novella, P.
Sorel, M.
Tornero, A.
TI Large-angle production of charged pions by 3 GeV/c-12 GeV/c protons on
carbon, copper and tin targets
SO EUROPEAN PHYSICAL JOURNAL C
LA English
DT Article
ID ATMOSPHERIC NEUTRINO FLUX; PRODUCTION CROSS-SECTION; OF-FLIGHT SYSTEM;
HARP EXPERIMENT; POSITIVE PIONS; CERN PS; PERFORMANCE; CALIBRATION;
COLLISIONS; DETECTOR
AB A measurement of the double-differential pi(+/-) production cross-section in proton-carbon, proton-copper and proton-tin collisions in the range of pion momentum 100 MeV/c <= p <800 MeV/c and angle 0.35 rad <= theta < 2.15 rad is presented. The data were taken with the HARP detector in the T9 beam line of the CERN PS. The pions were produced by proton beams in a momentum range from 3 GeV/c to 12 GeV/c hitting a target with a thickness of 5% of a nuclear interaction length. The tracking and identification of the produced particles was done using a small-radius cylindrical time projection chamber (TPC) placed in a solenoidal magnet. An elaborate system of detectors in the beam line ensured the identification of the incident particles. Results are shown for the double-differential cross-sections d(2) sigma/dp d theta at four incident proton beam momenta (3 GeV/c, 5 GeV/c, 8 GeV/c and 12 GeV/c).
C1 [Catanesi, M. G.; Radicioni, E.] Sezione Ist Nazl Fis Nucl, Bari, Italy.
[Edgecock, R.; Ellis, M.; Robbins, S.; Soler, F. J. P.] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
[Goessling, C.] Univ Dortmund, Inst Phys, D-4600 Dortmund, Germany.
[Bunyatov, S.; Krasnoperov, A.; Popov, B.; Serdiouk, V.; Tereschenko, V.] Joint Inst Nucl Res Dubna, Dubna, Russia.
[Di Capua, E.; Vidal-Sitjes, G.] Univ Studi, Ferrara, Italy.
[Di Capua, E.; Vidal-Sitjes, G.] Sezione Ist Nazl Fis Nucl, Ferrara, Italy.
[Arce, P.; Artamonov, A.; Giani, S.; Gilardoni, S.; Gorbunov, P.; Grant, A.; Grossheim, A.; Gruber, P.; Ivanchenko, V.; Kayis-Topaksu, A.; Panman, J.; Papadopoulos, I.; Pasternak, J.; Tcherniaev, E.; Tsukerman, I.; Veenhof, R.; Wiebusch, C.; Zucchelli, P.] CERN, Geneva, Switzerland.
[Blondel, A.; Campanelli, M.; Morone, M. C.; Prior, G.; Schroeter, R.] Univ Geneva, Sect Phys, Geneva, Switzerland.
[Engel, R.; Meurer, C.] Forschungszentrum Karlsruhe, Inst Phys, Karlsruhe, Germany.
[Kato, I.] Kyoto Univ, Kyoto, Japan.
[Gastaldi, U.] Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy.
[Mills, G. B.] Los Alamos Natl Lab, Los Alamos, NM USA.
[Graulich, J. S.; Gregoire, G.] Catholic Univ Louvain, Inst Phys Nucl, B-1348 Louvain, Belgium.
[Kirsanov, M.] Russian Acad Sci, Inst Nucl Res, Moscow, Russia.
[Bonesini, M.; Ferri, F.; Paganoni, M.] Univ Studi, Milan, Italy.
[Ferri, F.; Paganoni, M.; Paleari, F.] SEZ INFN Milano Bicocca, Milan, Italy.
[Bagulya, A.; Grichine, V.; Polukhina, N.] Russian Acad Sci, PN Lebedev Phys Inst, FIAN, Moscow, Russia.
[Palladino, V.] Univ Naples Federico II, Naples, Italy.
[Palladino, V.] Sezione Ist Nazl Fis Nucl, Naples, Italy.
[Coney, L.; Schmitz, D.] Columbia Univ, New York, NY USA.
[Barr, G.; De Santo, A.; Pattison, C.; Zuber, K.] Univ Oxford, Nucl & Astrophys Lab, Oxford OX1 2JD, England.
[Bobisut, F.; Gibin, D.; Guglielmi, A.; Mezzetto, M.] Univ Studi, Padua, Italy.
[Bobisut, F.; Gibin, D.; Guglielmi, A.; Mezzetto, M.] Sezione Ist Nazl Fis Nucl, Padua, Italy.
[Booth, C.; Buttar, C.; Hodgson, P.; Howlett, L.] Univ Sheffield, Dept Phys, Sheffield, S Yorkshire, England.
[Bogomilov, M.; Chizhov, M.; Kolev, D.; Tsenov, R.] Sofia Univ St Kliment Ohridski, Fac Phys, Sofia, Bulgaria.
[Piperov, S.; Temnikov, P.] Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, Sofia, Bulgaria.
[Apollonio, M.; Chimenti, P.; Giannini, G.; Santin, G.] Univ Studi, Trieste, Italy.
[Apollonio, M.; Chimenti, P.; Giannini, G.; Santin, G.] Sezione Ist Nazl Fis Nucl, Trieste, Italy.
[Cervera-Villanueva, A.; Gomez-Cadenas, J. J.; Martin-Albo, J.; Novella, P.; Sorel, M.; Tornero, A.] CSIC, IFIC, Inst Fis Corpuscular, Madrid, Spain.
[Burguet-Castell, J.; Cervera-Villanueva, A.; Gomez-Cadenas, J. J.; Martin-Albo, J.; Novella, P.; Sorel, M.; Tornero, A.] Univ Valencia, E-46003 Valencia, Spain.
[Arce, P.; Tsukerman, I.] Univ Cantabria, Inst Fis Cantabria, E-39005 Santander, Spain.
[Artamonov, A.] ITEP, Moscow, Russia.
[Dumarchez, J.; Vannucci, F.] Univ Paris 06, LPNHE, Paris, France.
[Dumarchez, J.; Vannucci, F.] Univ Paris 07, Paris, France.
[Catanesi, M. G.; Radicioni, E.] Univ Studi, Bari, Italy.
RP Catanesi, MG (reprint author), Univ Studi, Bari, Italy.
EM gomez@mail.cern.ch
RI Gomez Cadenas, Juan Jose/L-2003-2014; Grichine, Vladimir/M-8526-2015;
Polukhina, Natalia/E-1610-2014; Arce, Pedro/L-1268-2014; Soler,
Paul/E-8464-2011; Tcherniaev, Evgueni/G-3453-2016; Graulich,
Jean-Sebastien/B-4806-2009; Buttar, Craig/D-3706-2011; Chimenti,
Pietro/F-9898-2012; Wiebusch, Christopher/G-6490-2012; Prior,
Gersende/I-8191-2013; Bagulya, Alexander/D-4273-2014; Novella,
Pau/K-2845-2014; Paganoni, Marco/A-4235-2016; Morone, Maria
Cristina/P-4407-2016; Temnikov, Petar/L-6999-2016; Booth,
Christopher/B-5263-2016;
OI Gomez Cadenas, Juan Jose/0000-0002-8224-7714; Arce,
Pedro/0000-0003-3009-0484; Soler, Paul/0000-0002-4893-3729; Tcherniaev,
Evgueni/0000-0002-3685-0635; Chimenti, Pietro/0000-0002-9755-5066;
Wiebusch, Christopher/0000-0002-6418-3008; Novella,
Pau/0000-0002-0923-3172; Paganoni, Marco/0000-0003-2461-275X; Morone,
Maria Cristina/0000-0002-0200-0632; Temnikov, Petar/0000-0002-9559-3384;
Prior, Gersende/0000-0002-6058-1420; Booth,
Christopher/0000-0002-6051-2847; Sorel, Michel/0000-0003-2141-9508;
Martin-Albo, Justo/0000-0002-7318-1469; Schmitz,
David/0000-0003-2165-7389
NR 35
TC 20
Z9 20
U1 0
U2 2
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1434-6044
EI 1434-6052
J9 EUR PHYS J C
JI Eur. Phys. J. C
PD JAN
PY 2008
VL 53
IS 2
BP 177
EP 204
DI 10.1140/epjc/s10052-007-0475-4
PG 28
WC Physics, Particles & Fields
SC Physics
GA 250KQ
UT WOS:000252299200001
ER
PT J
AU Yazgan, E
Damgov, J
Akchurin, N
Genchev, V
Green, D
Kunori, S
Schmitt, M
Wu, W
Zeyrek, MT
AF Yazgan, E.
Damgov, J.
Akchurin, N.
Genchev, V.
Green, D.
Kunori, S.
Schmitt, M.
Wu, W.
Zeyrek, M. T.
TI Search for a standard model Higgs boson in CMS via vector boson fusion
in the H -> WW -> l nu l nu channel
SO EUROPEAN PHYSICAL JOURNAL C
LA English
DT Article
ID WEAK INTERACTIONS; HIGH-ENERGIES; MASS
AB We present the potential for discovering the standard model Higgs boson produced via the vector-boson fusion mechanism. We considered the decay of Higgs bosons to the W(+)W(-)final state, with both W-bosons subsequently decaying leptonically. The main background is t (t) over bar produced in association with one or more jets. This study is based on a full simulation of the CMS detector. The result is that a signal of 5 sigma significance can be obtained with an integrated luminosity of 12-72 fb(-1) stop for Higgs boson masses in the range 130 < m(H)< 200 GeV. In addition, the major background can be measured directly to 7% from the data with an integrated luminosity of 30 fb(-1) stop. We also suggest a method to determine the Higgs mass using template transverse mass distributions.
C1 [Yazgan, E.; Zeyrek, M. T.] Middle E Tech Univ, TR-06531 Ankara, Turkey.
[Yazgan, E.; Damgov, J.; Green, D.; Wu, W.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
[Damgov, J.; Genchev, V.] Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, Sofia, Bulgaria.
[Akchurin, N.] Texas Tech Univ, Lubbock, TX 79409 USA.
[Kunori, S.] Univ Maryland, College Pk, MD 20742 USA.
[Schmitt, M.] Northwestern Univ, Evanston, IL USA.
RP Yazgan, E (reprint author), Middle E Tech Univ, TR-06531 Ankara, Turkey.
EM efe@fnal.gov
RI Yazgan, Efe/C-4521-2014
OI Yazgan, Efe/0000-0001-5732-7950
NR 15
TC 4
Z9 4
U1 0
U2 0
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013 USA
SN 1434-6044
J9 EUR PHYS J C
JI Eur. Phys. J. C
PD JAN
PY 2008
VL 53
IS 2
BP 329
EP 347
DI 10.1140/epjc/s10052-007-0485-2
PG 19
WC Physics, Particles & Fields
SC Physics
GA 250KQ
UT WOS:000252299200012
ER
PT J
AU Robert, A
Wagner, J
Hartl, W
Autenrieth, T
Grubel, G
AF Robert, A.
Wagner, J.
Haertl, W.
Autenrieth, T.
Gruebel, G.
TI Dynamics in dense suspensions of charge-stabilized colloidal particles
SO EUROPEAN PHYSICAL JOURNAL E
LA English
DT Article
ID HYDRODYNAMIC INTERACTION; TIME DYNAMICS; DIFFUSION; SPHERES;
MONODISPERSE
AB The dynamic behavior of charge-stabilized colloidal particles in suspension was studied by photon correlation spectroscopy with coherent X-rays (XPCS). The short-time diffusion coefficient, D(Q), was measured for volume concentrations phi <= 0.18 and compared to the free particle diffusion constant D(0) and the static structure factor S(Q) . The data show that indirect, hydrodynamic interactions are relevant for the system and hydrodynamic functions were derived. The results are in striking contrast to the predictions of the PA (pairwise-additive approximation) model, but show features typical for a hard-sphere system. The observed mobility is however considerably smaller than the one of a respective hard-sphere system. The hydrodynamic functions can be modelled quantitatively if one allows for an increased effective viscosity relative to the hard-sphere case.
C1 [Robert, A.] European Synchrotron Radiat Facil, F-38043 Grenoble, France.
[Wagner, J.] Univ Saarland, D-66123 Saarbrucken, Germany.
[Haertl, W.] Wallburg Realschule, D-97483 Eltmann, Germany.
[Autenrieth, T.; Gruebel, G.] HASYLAB, DESY, D-22607 Hamburg, Germany.
RP Robert, A (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, 2575 Sand Hill RD,Menlo Pk, Menlo Pk, CA 94025 USA.
EM aymeric@slac.stanford.edu
NR 22
TC 12
Z9 12
U1 2
U2 18
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1292-8941
J9 EUR PHYS J E
JI Eur. Phys. J. E
PD JAN
PY 2008
VL 25
IS 1
BP 77
EP 81
DI 10.1140/epje/i2007-10265-5
PG 5
WC Chemistry, Physical; Materials Science, Multidisciplinary; Physics,
Applied; Polymer Science
SC Chemistry; Materials Science; Physics; Polymer Science
GA 270YU
UT WOS:000253756900009
PM 18265932
ER
PT S
AU Watkins, JH
Rodriguez, MA
AF Watkins, Jennifer H.
Rodriguez, Marko A.
BE Nayak, R
Ichalkaranje, N
Jain, LC
TI A Survey of Web-Based Collective Decision Making Systems
SO EVOLUTION OF THE WEB IN ARTIFICIAL INTELLIGENCE ENVIRONMENTS
SE Studies in Computational Intelligence
LA English
DT Article; Book Chapter
ID RECOMMENDER SYSTEMS; PREDICTION MARKETS; SUPPORT-SYSTEMS; RECALL
AB A collective decision making system uses an aggregation mechanism to combine the input of individuals to generate a decision. The decisions generated serve a variety of purposes from governance rulings to forecasts for planning. The Internet hosts a suite of collective decision making systems, some that were inconceivable before the web. In this paper, we present a taxonomy of collective decision making systems into which we place seven principal web-based tools. This taxonomy serves to elucidate the state of the art in web-based collective decision making as well as to highlight opportunities for innovation.
C1 [Watkins, Jennifer H.; Rodriguez, Marko A.] Los Alamos Natl Lab, Digital Lib Res & Prototyping Team, Los Alamos, NM 87545 USA.
RP Watkins, JH (reprint author), Los Alamos Natl Lab, Digital Lib Res & Prototyping Team, POB 1663, Los Alamos, NM 87545 USA.
EM jhw@lanl.gov
NR 85
TC 3
Z9 3
U1 0
U2 0
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 1860-949X
BN 978-3-540-79139-3
J9 STUD COMPUT INTELL
PY 2008
VL 130
BP 243
EP 277
D2 10.1007/978-3-540-79140-9
PG 35
WC Computer Science, Artificial Intelligence; Telecommunications
SC Computer Science; Telecommunications
GA BJO23
UT WOS:000266888400011
ER
PT J
AU Keim, P
Pearson, T
Okinaka, RT
AF Keim, Paul
Pearson, Talima
Okinaka, Richard T.
BE Baquero, F
Nombela, C
Cassell, GH
GutierrezFuentes, JA
TI Evolution of Bacillus anthracis, Causative Agent of Anthrax
SO EVOLUTIONARY BIOLOGY OF BACTERIAL AND FUNGAL PATHOGENS
LA English
DT Article; Book Chapter
ID SINGLE-NUCLEOTIDE POLYMORPHISMS; DEPENDENT ADENYLATE-CYCLASE;
CLOSELY-RELATED BACTERIA; PROTECTIVE ANTIGEN; SEQUENCE CONSERVATION;
POPULATION-STRUCTURE; GENOME SEQUENCE; RIBOSOMAL-RNA; LETHAL FACTOR;
PXO1 PLASMID
C1 [Keim, Paul; Pearson, Talima; Okinaka, Richard T.] No Arizona Univ, Dept Biol Sci, Flagstaff, AZ 86011 USA.
[Keim, Paul; Okinaka, Richard T.] Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA.
RP Keim, P (reprint author), No Arizona Univ, Dept Biol Sci, Box 5640, Flagstaff, AZ 86011 USA.
NR 80
TC 0
Z9 0
U1 0
U2 0
PU AMER SOC MICROBIOLOGY
PI WASHINGTON
PA 1752 N STREET NW, WASHINGTON, DC 20036-2904 USA
BN 978-1-55581-563-9
PY 2008
BP 523
EP 533
PG 11
WC Infectious Diseases; Microbiology; Pathology
SC Infectious Diseases; Microbiology; Pathology
GA BOX96
UT WOS:000277991000045
ER
PT S
AU Garvey, GT
AF Garvey, Gerald T.
BE Trache, L
Stoica, S
TI Message of a (proud) mentor
SO EXOTIC NUCLEI AND NUCLEAR /PARTICLE ASTROPHYSICS (II)
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 22nd Carpathian Summer School of Physics 2007
CY AUG 20-31, 2007
CL Sinaia, ROMANIA
SP Natl Inst Phys & Nuclear Engn, Cyclotron Inst, Texas A&M Univ, Coll Stn, Romanian Natl Author Sci Res
C1 [Garvey, Gerald T.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Garvey, GT (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0490-8
J9 AIP CONF PROC
PY 2008
VL 972
BP 3
EP +
PG 2
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA BHI01
UT WOS:000253372300001
ER
PT S
AU Vary, JP
Maris, P
Negoita, A
Navratil, R
Gueorguiev, VG
Ormand, WE
Nogga, A
Shirokov, A
Stoica, S
AF Vary, J. P.
Maris, P.
Negoita, A.
Navratil, R.
Gueorguiev, V. G.
Ormand, W. E.
Nogga, A.
Shirokov, A.
Stoica, S.
BE Trache, L
Stoica, S
TI Elements of the ab initio no core shell model
SO EXOTIC NUCLEI AND NUCLEAR /PARTICLE ASTROPHYSICS (II)
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 22nd Carpathian Summer School of Physics 2007
CY AUG 20-31, 2007
CL Sinaia, ROMANIA
SP Natl Inst Phys & Nuclear Engn, Cyclotron Inst, Texas A&M Univ, Coll Stn, Romanian Natl Author Sci Res
DE light nuclear properties; chiral effective field theory; inverse
scattering potentials; many-body theory
ID EFFECTIVE-FIELD THEORY; CHIRAL LAGRANGIANS; NUCLEAR-FORCES; LIGHT-NUCLEI
AB We outline the ab initio no core shell model and present recent results. Nuclear properties are evaluated with two-nucleon (NN) and three-nucleon interactions (TNI) derived within effective field theory (EFT) based on chiral perturbation theory (ChPT). Fitting two available parameters of the TNI generates good descriptions of light nuclei. In another effort, referred to as the ab exitu approach, results are obtained with a realistic NN interaction derived by inverse scattering theory with off-shell properties tuned to fit light nuclei. Both approaches produce good results for observables sensitive to spin-orbit properties. In a third approach, we supplement the derived realistic effective interaction with phenomenological NN interaction terms with the goal to describe spectra of fp-shell nuclei in the limited basis spaces currently available.
C1 [Vary, J. P.; Maris, P.; Negoita, A.] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
[Navratil, R.; Gueorguiev, V. G.; Ormand, W. E.] Lawrence Livermore Natl Lab, Livermore, CA USA.
[Nogga, A.] Forschungszentrum Julich, Inst fur KernPhys Theor, D-52425 Julich, Germany.
[Shirokov, A.] Moscow MV Lomonosov State Univ, Skobeltsyn Inst Nucl Phys, Moscow 119992, Russia.
[Stoica, S.] Horia Hulubei Natl Inst Phys & Nucl Engn, Bucharest 76900, Romania.
RP Vary, JP (reprint author), Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
EM jvary@iastate.edu; fnegoita@nipne.ro; stoica@nipne.ro
RI Nogga, Andreas/A-3354-2008; Shirokov, Andrey/D-7054-2012; Gueorguiev,
Vesselin/A-9679-2009
OI Nogga, Andreas/0000-0003-2156-748X; Gueorguiev,
Vesselin/0000-0002-2022-6432
FU U. S. Department of Energy [DE-FG02-87ER40371, DE-FC02-07ER41457];
Lawrence Livermore National Laboratory [W-7405-Eng-48]; LDRD
[04-ERD-058]; U.S. DOE/SC/NP [SCW0498]; Russian Foundation of Basic
Research
FX This work was supported in part by the U. S. Department of Energy Grants
DE-FG02-87ER40371 and DE-FC02-07ER41457. This work was also partly
performed under the auspices of the U. S. Department of Energy by the
University of California, Lawrence Livermore National Laboratory under
contract No. W-7405-Eng-48. Support from the LDRD contract No.
04-ERD-058 and from U.S. DOE/SC/NP (Work Proposal Number SCW0498) is
acknowledged. This work was also supported in part by the Russian
Foundation of Basic Research.
NR 33
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0490-8
J9 AIP CONF PROC
PY 2008
VL 972
BP 49
EP +
PG 3
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA BHI01
UT WOS:000253372300006
ER
PT S
AU Tang, X
Rehm, KE
Ahmad, I
Brune, CR
Champagne, A
Greene, JP
Hecht, AA
Henderson, D
Janssen, RVF
Jiang, CL
Jisonna, L
Kahl, D
Moore, EF
Notani, M
Pardo, RC
Patel, N
Paul, M
Savard, G
Schiffer, JP
Segel, RE
Sinha, S
Shumard, B
Wuosmaa, AH
AF Tang, Xiaodong
Rehm, K. E.
Ahmad, I.
Brune, C. R.
Champagne, A.
Greene, J. P.
Hecht, A. A.
Henderson, D.
Janssen, R. V. F.
Jiang, C. L.
Jisonna, L.
Kahl, D.
Moore, E. F.
Notani, M.
Pardo, R. C.
Patel, N.
Paul, M.
Savard, G.
Schiffer, J. P.
Segel, R. E.
Sinha, S.
Shumard, B.
Wuosmaa, A. H.
BE Trache, L
Stoica, S
TI The S-E1 factor of the C-12(alpha,gamma)O-16 reaction and the N-16
beta-delayed alpha decay
SO EXOTIC NUCLEI AND NUCLEAR /PARTICLE ASTROPHYSICS (II)
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 22nd Carpathian Summer School of Physics 2007
CY AUG 20-31, 2007
CL Sinaia, ROMANIA
SP Natl Inst Phys & Nuclear Engn, Cyclotron Inst, Texas A&M Univ, Coll Stn, Romanian Natl Author Sci Res
DE C-12(alpha,gamma)O-16 reaction; N-16 beta-delayed alpha decay; S-E1
factor
ID CROSS-SECTION; PARTICLE EMISSION; STELLAR ENERGIES; NUCLEOSYNTHESIS;
SPECTRUM
AB The C-12(alpha,gamma)O-16 reaction is of great importance for the understanding the nuclear synthesis and explosion mechanism of the supernova. The cross section at the relevant stellar burning energies, around 300 keV, is dominated by the sub-threshold resonances. The N-16 beta-delayed alpha decay data provide the most sensitive constrain on this sub-threshold resonance. Using twin-ionization chambers, we have measured the alpha particles and C-12 recoil nuclei in coincidence. The spectrum has been fitted together with the published C-12(alpha,gamma)O-16 data and the elastic scattering phase shift data using R-matrix. The S-E1 factor at 300 keV has been determined as 73 +/- 21 keVb.
C1 [Tang, Xiaodong] Univ Notre Dame, Notre Dame, IN 46530 USA.
[Rehm, K. E.; Ahmad, I.; Greene, J. P.; Hecht, A. A.; Henderson, D.; Janssen, R. V. F.; Jiang, C. L.; Kahl, D.; Moore, E. F.; Notani, M.; Pardo, R. C.; Patel, N.; Savard, G.; Schiffer, J. P.; Sinha, S.; Shumard, B.] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
[Brune, C. R.] Ohio Univ, Athens, OH 45701 USA.
[Champagne, A.] Univ N Carolina, Chapel Hill, NC 27599 USA.
[Jisonna, L.; Segel, R. E.] Northwestern Univ, Evanston, IL 60208 USA.
[Paul, M.] Hebrew Univ Jerusalem, Jerusalem, Israel.
[Wuosmaa, A. H.] Western Michigan Univ, Kalamazoo, MI 49008 USA.
RP Tang, X (reprint author), Univ Notre Dame, Notre Dame, IN 46530 USA.
RI Tang, Xiaodong /F-4891-2016
NR 19
TC 1
Z9 1
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0490-8
J9 AIP CONF PROC
PY 2008
VL 972
BP 261
EP +
PG 2
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA BHI01
UT WOS:000253372300029
ER
PT S
AU Battistoni, G
Cerutti, F
Fasso, A
Ferrari, A
Garzelli, MV
Lantz, M
Muraro, S
Pinsky, LS
Ranft, J
Roesler, S
Sala, PR
AF Battistoni, G.
Cerutti, F.
Fasso, A.
Ferrari, A.
Garzelli, M. V.
Lantz, M.
Muraro, S.
Pinsky, L. S.
Ranft, J.
Roesler, S.
Sala, P. R.
BE Trache, L
Stoica, S
TI Secondary cosmic ray particles due to GCR interactions in the Earth's
atmosphere
SO EXOTIC NUCLEI AND NUCLEAR /PARTICLE ASTROPHYSICS (II)
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 22nd Carpathian Summer School of Physics 2007
CY AUG 20-31, 2007
CL Sinaia, ROMANIA
SP Natl Inst Phys & Nuclear Engn, Cyclotron Inst, Texas A&M Univ, Coll Stn, Romanian Natl Author Sci Res
DE GCR EAS; inclusive fluxes of secondary particles; Monte Carlo models and
codes
ID BESS SPECTROMETER; FLUKA CODE
AB Primary GCR interact with the Earth's atmosphere originating atmospheric showers, thus giving rise to fluxes of secondary particles in the atmosphere. Electromagnetic and hadronic interactions interplay in the production of these particles, whose detection is performed by means of complementary techniques in different energy ranges and at different depths in the atmosphere, down to the Earth's surface.
Monte Carlo codes are essential calculation tools which can describe the complexity of the physics of these phenomena, thus allowing the analysis of experimental data. However, these codes are affected by important uncertainties, concerning, in particular, hadronic physics at high energy. In this paper we shall report some results concerning inclusive particle fluxes and atmospheric shower properties as obtained using the FLUKA transport and interaction code. Some emphasis will also be given to the validation of the physics models of FLUKA involved in these calculations.
C1 [Battistoni, G.; Garzelli, M. V.; Muraro, S.; Sala, P. R.] Univ Milan, Dept Phys, Milan, Italy.
[Cerutti, F.; Ferrari, A.] CERN, CH-1211 Geneva 23, Switzerland.
[Fasso, A.] SLAC, Stanford, CA USA.
[Garzelli, M. V.; Lantz, M.] Chalmers Univ, Dept Fundamental Phys, Gothenburg, Sweden.
[Pinsky, L. S.] Univ Houston, Dept Phys, Houston, TX 77004 USA.
[Ranft, J.] Stegen Univ, Fachbereich 7 Phys, Stegen, Germany.
RP Battistoni, G (reprint author), Univ Milan, Dept Phys, Milan, Italy.
RI Battistoni, Giuseppe/B-5264-2012;
OI Battistoni, Giuseppe/0000-0003-3484-1724; sala,
paola/0000-0001-9859-5564
NR 21
TC 1
Z9 1
U1 1
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0490-8
J9 AIP CONF PROC
PY 2008
VL 972
BP 449
EP +
PG 2
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA BHI01
UT WOS:000253372300050
ER
PT S
AU Stetcu, L
AF Stetcu, Lonel
BE Trache, L
Stoica, S
TI No-core shell model as an effective theory
SO EXOTIC NUCLEI AND NUCLEAR /PARTICLE ASTROPHYSICS (II)
SE AIP CONFERENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT 22nd Carpathian Summer School of Physics 2007
CY AUG 20-31, 2007
CL Sinaia, ROMANIA
SP Natl Inst Phys & Nuclear Engn, Cyclotron Inst, Texas A&M Univ, Coll Stn, Romanian Natl Author Sci Res
DE shell model; effective operators
ID EFFECTIVE-FIELD-THEORY; HARMONIC TRAP
AB In the last years, much progress has been achived in the description of many-body systems. I discuss one possible way to improve upon the successes of the many-body approaches by employing general principles in order to construct more reliable interactions to be used in nuclear many-body calculations. Such approaches should give us more predictive power for the description of low-energy properties of nuclei far from stability.
C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM USA.
RP Stetcu, L (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM USA.
NR 16
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0490-8
J9 AIP CONF PROC
PY 2008
VL 972
BP 541
EP 545
PG 5
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA BHI01
UT WOS:000253372300068
ER
PT J
AU Tripkovic, DV
Strmcnik, D
van der Vliet, D
Stamenkovic, V
Markovic, NM
AF Tripkovic, D. V.
Strmcnik, D.
van der Vliet, D.
Stamenkovic, V.
Markovic, N. M.
TI The role of anions in surface electrochemistry
SO FARADAY DISCUSSIONS
LA English
DT Article; Proceedings Paper
CT Conference on Electrocatalysis Theory and Experiment at the Interface
CY JUL 07-09, 2008
CL Univ Southampton, Southampton, ENGLAND
HO Univ Southampton
ID SINGLE-CRYSTAL ELECTRODES; SCANNING-TUNNELING-MICROSCOPY; OXYGEN
REDUCTION; UNDERPOTENTIAL DEPOSITION; HYDROGEN ADSORPTION; H-2/CO
MIXTURES; ACID-SOLUTIONS; PT(111); ELECTROOXIDATION; DIFFRACTION
AB Some issues of the current state of understanding in the surface electrochemistry are discussed, with emphases on the role of specifically adsorbing anions in hydrogen adsorption and oxide formation, adsorption and ordering of molecular adsorbates and metal ions, metal deposition, restructuring and stability of surface atoms, and kinetics of electrochemical reactions.
C1 [Tripkovic, D. V.; Strmcnik, D.; van der Vliet, D.; Stamenkovic, V.; Markovic, N. M.] Univ Chicago, Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
RP Markovic, NM (reprint author), Univ Chicago, Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
EM nmmarkovic@anl.gov
RI van der Vliet, Dennis/P-2983-2015
OI van der Vliet, Dennis/0000-0002-2524-527X
NR 48
TC 70
Z9 70
U1 5
U2 37
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1364-5498
J9 FARADAY DISCUSS
JI Faraday Discuss.
PY 2008
VL 140
BP 25
EP 40
DI 10.1039/b803714k
PG 16
WC Chemistry, Physical
SC Chemistry
GA 365VR
UT WOS:000260437800003
PM 19213308
ER
PT J
AU Lucas, CA
Cormack, M
Gallagher, ME
Brownrigg, A
Thompson, P
Fowler, B
Grunder, Y
Roy, J
Stamenkovic, V
Markovic, NM
AF Lucas, Christopher A.
Cormack, Michael
Gallagher, Mark E.
Brownrigg, Alexander
Thompson, Paul
Fowler, Ben
Grunder, Yvonne
Roy, Jerome
Stamenkovic, Vojislav
Markovic, Nenad M.
TI From ultra-high vacuum to the electrochemical interface: X-ray
scattering studies of model electrocatalysts
SO FARADAY DISCUSSIONS
LA English
DT Article; Proceedings Paper
CT Conference on Electrocatalysis Theory and Experiment at the Interface
CY JUL 07-09, 2008
CL Univ Southampton, Southampton, ENGLAND
HO Univ Southampton
ID ALLOY SURFACES; OXYGEN REDUCTION; AU(001) RECONSTRUCTION; ELECTROLYTE
INTERFACE; DIFFRACTION; PT(111); RELAXATION; REFLECTIVITY; SEGREGATION;
ADSORPTION
AB In-situ surface X-ray scattering (SXS) has become a powerful probe of the atomic structure at the metal-electrolyte interface. In this paper we describe an experiment in which a Pt(111) sample is prepared under ultra-high vacuum (UHV) conditions to have a p(2 x 2) oxygen layer adsorbed on the surface. The surface is then studied using SXS under UHV conditions before successive transfer to a bulk water environment and then to the electrochemical environment (0.1 M KOH solution) under an applied electrode potential. The Pt surface structure is examined in detail using crystal truncation rod (CTR) measurements under these different conditions. Finally, some suggestions for future experiments on alloy materials, using the same methodology, are proposed and discussed in relation to previous results.
C1 [Lucas, Christopher A.; Cormack, Michael; Brownrigg, Alexander; Thompson, Paul; Fowler, Ben] Univ Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England.
[Gallagher, Mark E.] Univ Liverpool, Surface Sci Res Ctr, Liverpool L69 7ZE, Merseyside, England.
[Grunder, Yvonne; Roy, Jerome] European Synchrotron Radiat Facil, F-38043 Grenoble, France.
[Stamenkovic, Vojislav; Markovic, Nenad M.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
RP Lucas, CA (reprint author), Univ Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England.
EM clucas@liv.ac.uk
RI Grunder, Yvonne/C-6137-2011;
OI Grunder, Yvonne/0000-0002-5295-0927; Lucas,
Christopher/0000-0001-5743-3868
NR 44
TC 14
Z9 14
U1 2
U2 23
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1364-5498
J9 FARADAY DISCUSS
JI Faraday Discuss.
PY 2008
VL 140
BP 41
EP 58
DI 10.1039/b803523g
PG 18
WC Chemistry, Physical
SC Chemistry
GA 365VR
UT WOS:000260437800004
PM 19213309
ER
PT J
AU Delacote, C
Bonakdarpour, A
Johnston, CM
Zelenay, P
Wieckowski, A
AF Delacote, Cyril
Bonakdarpour, Arman
Johnston, Christina M.
Zelenay, Piotr
Wieckowski, Andrzej
TI Aqueous-based synthesis of ruthenium-selenium catalyst for oxygen
reduction reaction
SO FARADAY DISCUSSIONS
LA English
DT Article; Proceedings Paper
CT Conference on Electrocatalysis Theory and Experiment at the Interface
CY JUL 07-09, 2008
CL Univ Southampton, Southampton, ENGLAND
HO Univ Southampton
ID RU/C CATHODE CATALYSTS; METHANOL FUEL-CELL; ELECTROCATALYSTS;
NANOPARTICLES; SE; SPECTROSCOPY; FABRICATION; ELECTRODES; KINETICS
AB Carbon-supported Se/Ru(Se) catalysts of a broad range of composition were synthesized via a reduction procedure in which a mixture of RuCl(3), SeO(2) and Black Pearl carbon was treated with NaBH(4) in basic media at room temperature. Physical characterization of the catalyst was performed by X-ray diffraction, energy dispersive X-ray spectroscopy and by high resolution transmission electron microscopy. The effect of NaOH addition during the reduction by NaBH(4) and the impact of a post-reduction thermal treatment at 500 degrees C were interrogated. The activity of the catalyst towards the oxygen reduction reaction was studied by the use of a rotating disk electrode. It was found that the half-wave potential for the oxygen reduction reaction was about 0.78 V vs. RHE. The Se-to-Ru ratio and metal loading on carbon were optimized for the oxygen reduction reaction and the optimized catalyst was tested at the cathode of a polymer electrolyte fuel cell. The stability of the Se/Ru( Se) catalyst was evaluated by electrochemical cycling and by leaching the catalyst in 0.5 M H(2)SO(4) at 80 degrees C.
C1 [Delacote, Cyril; Bonakdarpour, Arman; Wieckowski, Andrzej] Univ Illinois, Dept Chem, Urbana, IL 61801 USA.
[Johnston, Christina M.; Zelenay, Piotr] Los Alamos Natl Lab, Mat Phys & Applicat Div, Los Alamos, NM 87545 USA.
RP Wieckowski, A (reprint author), Univ Illinois, Dept Chem, Urbana, IL 61801 USA.
EM andrzej@scs.uiuc.edu
RI Johnston, Christina/A-7344-2011
NR 39
TC 29
Z9 29
U1 3
U2 21
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1364-5498
J9 FARADAY DISCUSS
JI Faraday Discuss.
PY 2008
VL 140
BP 269
EP 281
DI 10.1039/b806377j
PG 13
WC Chemistry, Physical
SC Chemistry
GA 365VR
UT WOS:000260437800019
PM 19213322
ER
PT J
AU Yu, CF
Koh, S
Leisch, JE
Toney, MF
Strasser, P
AF Yu, Chengfei
Koh, Shirlaine
Leisch, Jennifer E.
Toney, Michael F.
Strasser, Peter
TI Size and composition distribution dynamics of alloy nanoparticle
electrocatalysts probed by anomalous small angle X-ray scattering
(ASAXS)
SO FARADAY DISCUSSIONS
LA English
DT Article; Proceedings Paper
CT Conference on Electrocatalysis Theory and Experiment at the Interface
CY JUL 07-09, 2008
CL Univ Southampton, Southampton, ENGLAND
HO Univ Southampton
ID ACTIVITY-STABILITY RELATIONSHIPS; OXYGEN REDUCTION REACTION; TEMPERATURE
FUEL-CELLS; PARTICLE-SIZE; PLATINUM; CATALYSTS; SITU; CO; ELECTRODE;
SURFACE
AB Anomalous small angle X-ray scattering (ASAXS) is shown to be an ideal technique to investigate the particle size and particle composition dynamics of carbon-supported alloy nanoparticle electrocatalysts at the atomic scale. In this technique, SAXS data are obtained at different X-ray energies close to a metal absorption edge, where the metal scattering strength changes, providing element specificity. ASAXS is used to, first, establish relationships between annealing temperature and the resulting particle size distribution for Pt(25)Cu(75) alloy nanoparticle electrocatalyst precursors. The Pt specific ASAXS profiles were fitted with log-normal distributions. High annealing temperatures during alloy synthesis caused a significant shift in the alloy particle size distribution towards larger particle diameters.
Second, ASAXS was used to characterize electrochemical Cu dissolution and dealloying processes of a carbon-supported Pt(25)Cu(75) electrocatalyst precursor in acidic electrolytes. By performing ASAXS at both the Pt and Cu absorption edges, the unique power of this technique is demonstrated for probing composition dynamics at the atomic scale. These ASAXS measurements provided detailed information on the changes in the size distribution function of the Pt atoms and Cu atoms. A shift in the Cu scattering profile towards larger scattering vectors indicated the removal of Cu atoms from the alloy particle surface suggesting the formation of a Pt enriched Pt shell surrounding a Pt-Cu core.
Together with XRD and TEM, ASAXS is proposed to play an increasingly important role in the mechanistic study of degradation phenomena of alloy nanoparticle electrocatalysts at the atomic scale.
C1 [Yu, Chengfei; Koh, Shirlaine; Strasser, Peter] Univ Houston, Dept Chem & Biomol Engn, Houston, TX 77204 USA.
[Leisch, Jennifer E.; Toney, Michael F.] Stanford Linear Accelerator Ctr, Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA.
RP Strasser, P (reprint author), Univ Houston, Dept Chem & Biomol Engn, Houston, TX 77204 USA.
RI Strasser, Peter/A-1868-2012
NR 64
TC 55
Z9 56
U1 4
U2 56
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1364-5498
J9 FARADAY DISCUSS
JI Faraday Discuss.
PY 2008
VL 140
BP 283
EP 296
DI 10.1039/b801586d
PG 14
WC Chemistry, Physical
SC Chemistry
GA 365VR
UT WOS:000260437800020
PM 19213323
ER
PT J
AU Wang, JX
Uribe, FA
Springer, TE
Zhang, JL
Adzic, RR
AF Wang, Jia X.
Uribe, Francisco A.
Springer, Thomas E.
Zhang, Junliang
Adzic, Radoslav R.
TI Intrinsic kinetic equation for oxygen reduction reaction in acidic
media: the double Tafel slope and fuel cell applications
SO FARADAY DISCUSSIONS
LA English
DT Article; Proceedings Paper
CT Conference on Electrocatalysis Theory and Experiment at the Interface
CY JUL 07-09, 2008
CL Univ Southampton, Southampton, ENGLAND
HO Univ Southampton
ID HYDROGEN OXIDATION REACTION; DISK ELECTRODE; CATALYST; CATHODE; PEMFC;
ADSORPTION; PT(111); PERFORMANCE; PARAMETERS; DEPENDENCE
AB According to Sergio Trasatti, "A true theory of electrocatalysis will not be available until activity can be calculated a priori from some known properties of the materials.'' Toward this goal, we developed intrinsic kinetic equations for the hydrogen oxidation reaction (HOR) and the oxygen reduction reaction (ORR) using as the kinetic parameters the free energies of adsorption and activation for elementary reactions. Rigorous derivation retained the intrinsic connection between the intermediates' adsorption isotherms and the kinetic equations, affording us an integrated approach for establishing the reaction mechanisms based upon various experimental and theoretical results. Using experimentally deduced free energy diagrams and activity-and-barriers plot for the ORR on Pt(111), we explained why the Tafel slope in the large overpotential region is double that in the small overpotential region. For carbon-supported Pt nanoparticles (Pt/C), the polarization curves measured with thin-film rotating disk electrodes also exhibit the double Tafel slope, albeit Pt(111) is several times more active than the Pt nanoparticles when the current is normalized by real surface area. An analytic method was presented for the polarization curves measured with H(2) in proton exchange membrane fuel cells (PEMFCs). The fit to a typical iR-free polarization curve at 80 degrees C revealed that the change of the Tafel slope occurs at about 0.77 V that is the reversible potential for the transition between adsorbed O and OH on Pt/C. This is significant because it predicts that the Butler-Volmer equation can only fit the data above this potential, regardless the current density. We also predicted a decrease of the Tafel slope from 70 to 65 mV dec(-1) at 80 degrees C with increasing oxygen partial pressure, which is consistent with the observation reported in literature.
C1 [Wang, Jia X.; Adzic, Radoslav R.] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
[Uribe, Francisco A.; Springer, Thomas E.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Zhang, Junliang] Gen Motors Corp, Fuel Cell Res Ctr, Honeoye Falls, NY 14472 USA.
RP Wang, JX (reprint author), Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
EM jia@bnl.gov.gov
RI Wang, Jia/B-6346-2011
NR 35
TC 71
Z9 72
U1 5
U2 82
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1364-5498
J9 FARADAY DISCUSS
JI Faraday Discuss.
PY 2008
VL 140
BP 347
EP 362
DI 10.1039/b802218f
PG 16
WC Chemistry, Physical
SC Chemistry
GA 365VR
UT WOS:000260437800024
PM 19213326
ER
PT J
AU Jellinek, J
AF Jellinek, Julius
TI Nanoalloys: tuning properties and characteristics through size and
composition
SO FARADAY DISCUSSIONS
LA English
DT Article; Proceedings Paper
CT Meeting on Nanoalloys: From Theory to Application
CY SEP 03-05, 2007
CL Univ Birmingham, Birmingham, ENGLAND
HO Univ Birmingham
ID BIMETALLIC CLUSTERS; ALLOY CLUSTERS; IONIZATION-POTENTIALS;
METAL-CLUSTERS; TRANSITION; COBALT; AL; REACTIVITY; ALUMINUM; 13-ATOM
AB A brief sketch of the history of metals and alloys is followed by examples illustrating the current status of the field of nanoalloys and a discussion of our results on the characterization of structural and dynamical (thermal) properties of Ni-Al bimetallic clusters.
C1 Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA.
RP Jellinek, J (reprint author), Argonne Natl Lab, Chem Sci & Engn Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM jellinek@anl.gov
NR 44
TC 57
Z9 57
U1 2
U2 14
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1359-6640
EI 1364-5498
J9 FARADAY DISCUSS
JI Faraday Discuss.
PY 2008
VL 138
BP 11
EP 35
DI 10.1039/b800086g
PG 25
WC Chemistry, Physical
SC Chemistry
GA 269JJ
UT WOS:000253645000002
PM 18447006
ER
PT J
AU Herzing, AA
Watanabe, M
Edwards, JK
Conte, M
Tang, ZR
Hutchings, GJ
Kiely, CJ
AF Herzing, Andrew A.
Watanabe, Masashi
Edwards, Jennifer K.
Conte, Marco
Tang, Zi-Rong
Hutchings, Graham J.
Kiely, Christopher J.
TI Energy dispersive X-ray spectroscopy of bimetallic nanoparticles in an
aberration corrected scanning transmission electron microscope
SO FARADAY DISCUSSIONS
LA English
DT Article; Proceedings Paper
CT Meeting on Nanoalloys: From Theory to Application
CY SEP 03-05, 2007
CL Univ Birmingham, Birmingham, ENGLAND
HO Univ Birmingham
ID AU-PD CATALYSTS; HYDROGEN-PEROXIDE; UNCONVENTIONAL METHODS; H-2; IMAGE;
GOLD; MICROANALYSIS; PALLADIUM; SPECIMENS; OXIDATION
AB The technique of X-ray energy dispersive spectroscopy (XEDS) spectrum imaging in a dedicated scanning transmission electron microscope ( STEM) is discussed in relation to its applicability to bimetallic nanoparticles. It is shown that the recent availability of aberration corrected microscopes and multivariate statistical analysis (MSA) techniques has allowed us to overcome many of the intrinsic limitations previously encountered when attempting STEM-XEDS spectrum imaging on nanoscopic volumes of material. We demonstrate through a variety of applications to Au-Ag and Au-Pd bimetallic nanoparticle systems, that STEM-XEDS can provide invaluable high spatial resolution compositional information on (i) alloy homogeneity and phase segregation effects within individual nanoparticles, (ii) particle size-alloy composition correlations, (iii) the detection of trace amounts of alloying element and (iv) metal component distribution in extremely highly dispersed catalyst systems.
C1 [Herzing, Andrew A.; Watanabe, Masashi; Kiely, Christopher J.] Lehigh Univ, Ctr Adv Mat & Nanotechnol, Bethlehem, PA 18015 USA.
[Edwards, Jennifer K.; Conte, Marco; Tang, Zi-Rong; Hutchings, Graham J.] Cardiff Univ, Sch Chem, Cardiff CF10 3AT, S Glam, Wales.
[Watanabe, Masashi] Lawrence Berkeley Natl Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA.
RP Kiely, CJ (reprint author), Lehigh Univ, Ctr Adv Mat & Nanotechnol, 5 E Packer Ave, Bethlehem, PA 18015 USA.
EM chk5@lehigh.edu
RI Kiely, Christopher/B-1959-2008; Herzing, Andrew/D-6239-2012; Edwards,
Jennifer/F-4518-2011;
OI Conte, Marco/0000-0002-1399-0344
NR 40
TC 63
Z9 63
U1 4
U2 53
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1364-5498
J9 FARADAY DISCUSS
JI Faraday Discuss.
PY 2008
VL 138
BP 337
EP 351
DI 10.1039/b706293c
PG 15
WC Chemistry, Physical
SC Chemistry
GA 269JJ
UT WOS:000253645000023
PM 18447024
ER
PT J
AU Wlodawer, A
Minor, W
Dauter, Z
Jaskolski, M
AF Wlodawer, Alexander
Minor, Wladek
Dauter, Zbigniew
Jaskolski, Mariusz
TI Protein crystallography for non-crystallographers, or how to get the
best (but not more) from published macromolecular structures
SO FEBS JOURNAL
LA English
DT Review
DE protein crystallography; Protein Data Bank; restraints; resolution;
R-factor; structure determination; structure interpretation; structure
quality; structure refinement; structure validation
ID SARCOMA VIRUS INTEGRASE; CRYSTAL-STRUCTURE; CATALYTIC DOMAIN;
ANGSTROM-RESOLUTION; RIBOSOMAL-SUBUNIT; ACTIVE-SITE; ESCHERICHIA-COLI;
3-DIMENSIONAL STRUCTURE; RADIATION-DAMAGE; ATOMIC-STRUCTURE
AB The number of macromolecular structures deposited in the Protein Data Bank now exceeds 45 000, with the vast majority determined using crystallographic methods. Thousands of studies describing such structures have been published in the scientific literature, and 14 Nobel prizes in chemistry or medicine have been awarded to protein crystallographers. As important as these structures are for understanding the processes that take place in living organisms and also for practical applications such as drug design, many non-crystallographers still have problems with critical evaluation of the structural literature data. This review attempts to provide a brief outline of technical aspects of crystallography and to explain the meaning of some parameters that should be evaluated by users of macromolecular structures in order to interpret, but not over-interpret, the information present in the coordinate files and in their description. A discussion of the extent of the information that can be gleaned from the coordinates of structures solved at different resolution, as well as problems and pitfalls encountered in structure determination and interpretation are also covered.
C1 [Wlodawer, Alexander] NCI, Macromol Crystallog Lab, Prot Struct Sect, Ft Detrick, MD 21702 USA.
[Minor, Wladek] Univ Virginia, Dept Physiol & Mol Biolphys, Charlottesville, VA USA.
[Dauter, Zbigniew] NCI, Argonne Natl Lab, Macromol Crystallog Lab, Bethesda, MD 20892 USA.
[Jaskolski, Mariusz] Adam Mickiewicz Univ Poznan, Dept Crystallog, Poznan, Poland.
[Jaskolski, Mariusz] Polish Acad Sci, Inst Bioorgan Chem, Ctr Biocrystallog Res, Poznan, Poland.
RP Wlodawer, A (reprint author), NCI, Macromol Crystallog Lab, Prot Struct Sect, Ft Detrick, MD 21702 USA.
EM wlodawer@ncifcrf.gov
RI Minor, Wladek/F-3096-2014;
OI Minor, Wladek/0000-0001-7075-7090
FU Intramural NIH HHS; NIGMS NIH HHS [GM53163, GM74942, R01 GM053163, U54
GM074942]
NR 81
TC 64
Z9 65
U1 7
U2 54
PU BLACKWELL PUBLISHING
PI OXFORD
PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND
SN 1742-464X
J9 FEBS J
JI FEBS J.
PD JAN
PY 2008
VL 275
IS 1
BP 1
EP 21
DI 10.1111/j.1742-4658.2007.06178.x
PG 21
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 242ZN
UT WOS:000251764800001
PM 18034855
ER
PT J
AU Druar, C
Yu, F
Barnes, JL
Okinaka, RT
Chantratita, N
Beg, S
Stratilo, CW
Olive, AJ
Soltes, G
Russell, ML
Limmathurotsakul, D
Norton, RE
Ni, SX
Picking, WD
Jackson, PJ
Stewart, DIH
Tsvetnitsky, V
Picking, WL
Cherwonogrodzky, JW
Ketheesan, N
Peacock, SJ
Wiersma, EJ
AF Druar, Chris
Yu, Fei
Barnes, Jodie L.
Okinaka, Richard T.
Chantratita, Narisara
Beg, Steve
Stratilo, Chad W.
Olive, Andrew J.
Soltes, Glenn
Russell, Michelle L.
Limmathurotsakul, Direk
Norton, Robert E.
Ni, Sally X.
Picking, William D.
Jackson, Paul J.
Stewart, Don I. H.
Tsvetnitsky, Vadim
Picking, Wendy L.
Cherwonogrodzky, John W.
Ketheesan, Natkunam
Peacock, Sharon J.
Wiersma, Erik J.
TI Evaluating Burkholderia pseudomallei Bip proteins as vaccines and Bip
antibodies as detection agents
SO FEMS IMMUNOLOGY AND MEDICAL MICROBIOLOGY
LA English
DT Article
DE Burkholderia pseudomallei; monoclonal antibody; type III secretion
system; vaccine; diagnostic detection
ID III SECRETION SYSTEM; SHIGELLA-FLEXNERI; HOST-CELLS; V ANTIGEN;
MELIOIDOSIS; INVASION; INFECTION; DIAGNOSIS; IDENTIFICATION; PROTECTION
AB Burkholderia pseudomallei is a biothreat agent and an important natural pathogen, causing melioidosis in humans and animals. A type III secretion system (TTSS-3) has been shown to be critical for virulence. Because TTSS components from other pathogens have been used successfully as diagnostic agents and as experimental vaccines, it was investigated whether this was the case for BipB, BipC and BipD, components of B. pseudomallei's TTSS-3. The sequences of BipB, BipC and BipD were found to be highly conserved among B. pseudomallei and B. mallei isolates. A collection of monoclonal antibodies (mAbs) specific for each Bip protein was obtained. Most recognized both native and denatured Bip protein. Burkholderia pseudomallei or B. mallei did not express detectable BipB or BipD under the growth conditions used. However, anti-BipD mAbs did recognize the TTSS needle structures of a Shigella strain engineered to express BipD. The authors did not find that BipB, BipC or BipD are protective antigens because vaccination of mice with any single protein did not result in protection against experimental melioidosis. Enzyme-linked immunosorbent assay (ELISA) studies showed that human melioidosis patients had antibodies to BipB and BipD. However, these ELISAs had low diagnostic accuracy in endemic regions, possibly due to previous patient exposure to B. pseudomallei.
C1 [Druar, Chris; Yu, Fei; Beg, Steve; Soltes, Glenn; Ni, Sally X.; Stewart, Don I. H.; Tsvetnitsky, Vadim; Wiersma, Erik J.] Cangene Corp, Mississauga, ON, Canada.
[Barnes, Jodie L.; Norton, Robert E.; Ketheesan, Natkunam] James Cook Univ N Queensland, Townsville, Qld 4811, Australia.
[Okinaka, Richard T.; Jackson, Paul J.] Los Alamos Natl Lab, Biosci Div, Los Alamos, NM USA.
[Chantratita, Narisara; Limmathurotsakul, Direk; Peacock, Sharon J.] Mahidol Univ, Bangkok 10700, Thailand.
[Stratilo, Chad W.; Russell, Michelle L.; Cherwonogrodzky, John W.] DRDC Suffield, Medicine Hat, AB, Canada.
[Olive, Andrew J.; Picking, William D.; Picking, Wendy L.] Univ Kansas, Dept Mol Biosci, Lawrence, KS 66045 USA.
[Norton, Robert E.] Queensland Hlth Pathol Serv, Townsville, Qld, Australia.
[Jackson, Paul J.] Lawrence Livermore Natl Lab, Host Pathogen Biol Grp, Livermore, CA USA.
RP Wiersma, EJ (reprint author), 3403 Amer Dr, Mississauga, ON L4V 1T4, Canada.
EM erikwiersma@sympatico.ca
RI Ketheesan, Natkunam/D-8891-2013;
OI Olive, Andrew/0000-0003-3441-3113
FU NIAID NIH HHS [AI034428, 1UO1AI056383-1, AI057927]
NR 44
TC 37
Z9 40
U1 0
U2 1
PU BLACKWELL PUBLISHING
PI OXFORD
PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND
SN 0928-8244
J9 FEMS IMMUNOL MED MIC
JI FEMS Immunol. Med. Microbiol.
PD JAN
PY 2008
VL 52
IS 1
BP 78
EP 87
DI 10.1111/j.1574-695X.2007.00345.x
PG 10
WC Immunology; Infectious Diseases; Microbiology
SC Immunology; Infectious Diseases; Microbiology
GA 250SQ
UT WOS:000252321200009
PM 17995960
ER
PT J
AU Morosin, B
Venturini, E
Samara, G
AF Morosin, Bruno
Venturini, Eugene
Samara, George
TI Pressure-Induced Phase Transition in a La-Doped Lead Zirconate Titanate
SO FERROELECTRICS
LA English
DT Article
ID PEROVSKITES; CERAMICS
AB Ceramic samples of Pb0.99La0.01(Zr0.91Ti0.09)O3 were studied by dielectric and time-of-flight neutron diffraction measurements at 300 and 250 K versus pressure. Isothermal dielectric data (300/250 K) suggest structural transitions with onsets near 0.35/0.37 GPa, respectively, for increasing pressure. On pressure release, only the 300K transition occurs (0.10 GPa; none indicated at 250 K). Diffraction data at 300 K show the sample has the R3c structure, remaining in that phase cooling to 250 K. Pressure increase (either 300 or 250 K) above 0.3 GPa yields a Pnma-like (AO) phase (two other prominent peaks in the spectra suggest a possible incommensurate cell). Temperature/pressure excursions show considerable phase hysteresis.
C1 [Morosin, Bruno; Venturini, Eugene] Sandia Natl Labs, Albuquerque, NM 87185 USA.
EM bmorosi@sandia.gov
FU U. S. Department of Energy's National Nuclear Security Administration;
Department of Energy [DE-AC04-94AL85000]; U. S. Department of Energy,
Office of Science [W-31-109-ENG-38]
FX The following are acknowledged: Pin Yang and Chris DiAntonio for samples
and discussions; Bruce Tuttle for discussion and support; Mark Rodriguez
and Ralph Tissot for discussions on computer issues; Maxim Avdeev for
comments on related materials; Joe Fieramosca, Bob Von Dreele, and Ryoji
Kiyanagi for data collection. The work at Sandia National Laboratories
was supported by the U. S. Department of Energy's National Nuclear
Security Administration. Sandia is operated by Sandia Corporation, a
Lockheed Martin Company, for the Department of Energy under Contract
DE-AC04-94AL85000. Data were collected at IPNS, Argonne National
Laboratory, which is supported by the U. S. Department of Energy, Office
of Science, Contract No. W-31-109-ENG-38.
NR 14
TC 0
Z9 0
U1 1
U2 3
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0015-0193
EI 1563-5112
J9 FERROELECTRICS
JI Ferroelectrics
PY 2008
VL 377
BP 120
EP 136
AR PII 906985548
DI 10.1080/00150190802523735
PG 17
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 385YO
UT WOS:000261849700010
ER
PT J
AU Galinetto, P
Casiraghi, A
Mozzati, MC
Azzoni, CB
Norton, D
Boatner, LA
Trepakov, V
AF Galinetto, P.
Casiraghi, A.
Mozzati, M. C.
Azzoni, C. B.
Norton, D.
Boatner, L. A.
Trepakov, V.
TI Magnetic and Structural Studies in Co- and Mn-implanted SrTiO3 Single
Crystals
SO FERROELECTRICS
LA English
DT Article; Proceedings Paper
CT 11th European Meeting on Ferroelectricity (EMF-2007)
CY SEP 03-07, 2007
CL Bled, SLOVENIA
ID ROOM-TEMPERATURE FERROMAGNETISM; THIN-FILMS; TITANIUM-DIOXIDE;
SEMICONDUCTORS
AB Micro Raman and static magnetization data on manganese or cobalt-implanted (at 3 or 5 at.%) strontium titanate (Mn,Co):SrTiO3 single crystals are presented. Micro Raman results reveal a cubic perovskite structure at 300 K with no evidence of any secondary phase. All samples show ferromagnetism both at 300 K and at 10 K. Moreover, micro Raman spectra at low temperature reveal the presence of polar ordering, which allow to consider the investigated materials as possible host matrices for multiferroic phenomena. Obtained results are discussed in connection to supplementary outcomes derived by content, optical absorption and electron paramagnetic resonance (EPR) measurements.
C1 [Galinetto, P.; Casiraghi, A.; Mozzati, M. C.; Azzoni, C. B.] Univ Pavia, CNISM, I-27100 Pavia, Italy.
[Galinetto, P.; Casiraghi, A.; Mozzati, M. C.; Azzoni, C. B.] Univ Pavia, Dipartimento Fis A Volta, I-27100 Pavia, Italy.
[Norton, D.] Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA.
[Boatner, L. A.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Trepakov, V.] Acad Sci Czech Republic, Inst Phys, Prague 18221 8, Czech Republic.
[Trepakov, V.] RAS, AF Ioffe Physicotech Inst, St Petersburg 194021, Russia.
RP Galinetto, P (reprint author), Univ Pavia, CNISM, Via Palestro 3, I-27100 Pavia, Italy.
EM galinetto@fisicavolta.unipv.it
RI Trepakov, Vladimir/H-1352-2014; Boatner, Lynn/I-6428-2013
OI Boatner, Lynn/0000-0002-0235-7594
NR 18
TC 10
Z9 11
U1 0
U2 9
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0015-0193
J9 FERROELECTRICS
JI Ferroelectrics
PY 2008
VL 368
BP 358
EP 368
AR PII 905097601
DI 10.1080/00150190802368248
PG 11
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 369EP
UT WOS:000260677400016
ER
PT J
AU Bussmann-Holder, A
Buttner, H
Bishop, AR
AF Bussmann-Holder, A.
Buettner, H.
Bishop, A. R.
TI Coexistence of polar order and local domain dynamics in ferroelectric
perovskites: The case of (SrTiO3)-O-18
SO FERROELECTRICS
LA English
DT Article
DE soft modes; local dynamics; isotope effects
ID POLARIZABILITY; TRANSITION; TITANATE; ORIGIN
AB Perovskite oxide ferroelectrics show classical soft mode behaviour typical for the onset of a homogeneous long-range polar state and a displacive phase transition. Besides these long wave length properties, local effects are observed by different probes which reveal that dynamical symmetry breaking already takes place far above the actual instability. It is shown here that displacive mean-field type dynamics can indeed coexist with local dynamical symmetry breaking which is typical for order-disorder driven phase transitions.
C1 [Bussmann-Holder, A.] Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany.
[Buettner, H.] Univ Bayreuth, Lehrstuhl Theoret Phys, D-95540 Bayreuth, Germany.
[Bishop, A. R.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Bussmann-Holder, A (reprint author), Max Planck Inst Solid State Res, Heisenbergstr 1, D-70569 Stuttgart, Germany.
EM A.Bussmann-Holder@fkf.mpg.de
NR 23
TC 1
Z9 1
U1 0
U2 3
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 2-4 PARK SQUARE, MILTON PARK, ABINGDON OR14 4RN, OXON, ENGLAND
SN 0015-0193
EI 1563-5112
J9 FERROELECTRICS
JI Ferroelectrics
PY 2008
VL 363
BP 73
EP 78
DI 10.1080/00150190802019296
PG 6
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 314WQ
UT WOS:000256840300013
ER
PT S
AU Smith, A
Do, B
Schuster, R
Collier, D
AF Smith, Arlee
Do, Binh
Schuster, Rod
Collier, David
BE Broeng, J
Headley, C
TI Rate equation model of bulk optical damage of silica, and the influence
of polishing on surface optical damage of silica
SO FIBER LASERS V: TECHNOLOGY, SYSTEMS, AND APPLICATIONS
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
(SPIE)
LA English
DT Proceedings Paper
CT Conference on Fiber Lasers V
CY JAN 21-24, 2008
CL San Jose, CA
SP SPIE, IPG Photon
ID LASER-INDUCED BREAKDOWN; DIELECTRICS; SIO2
AB Our objective is to understand the mechanism that generates catastrophic optical damage in pulsed fiber amplifiers. We measured optical damage thresholds of bulk fused silica at 1064 nm for 8 ns and 14 ps pulses. The 8 ns pulse is single longitudinal mode from a Q-switched laser, and the 14 ps pulse is from a Q-switched mode-lock laser. The beams in both cases are TEM00 mode, and they are focused to a 7.5 mu m spot inside a fused silica window. The pulse-to-pulse energy variations are 1% for 8 ns pulses and 5% for 14 ps pulses. Under these conditions optical damage is always accompanied by plasma formation at the focal spot; we found the damage threshold fluences are 3854 +/- 85 J/cm(2) for the 8 ns pulses and 25.4 +/- 1.0 J/cm(2) for the 14 ps pulses. These fluences are corrected for self focusing. Both damage thresholds are deterministic, in contrast to the claim often made in the literature that optical damage is statistical in the nanosecond range.
The measured damage threshold fluences for 8 ns and 14 ps pulses do not fit a square root of pulse duration scaling rule. We interpret the damage in terms of plasma formation initiated by multiphoton ionization and amplified by an electron avalanche. The damage threshold irradiance can be matched with a simple rate equation model that includes multiphoton ionization, electron avalanche, and electron-hole recombination.
The damage morphologies are dramatically different in the nanosecond and picosecond cases because of the large difference in deposited energy. However, both morphologies are reproducible from pulse to pulse.
We also measured surface damage thresholds for silica windows polished by different methods. We find that cerium oxide polished surfaces damage at approximately 40% of the bulk threshold, with a large statistical spread. Surfaces prepared using an Al2O3 polish damaged between 50% and 100% of the bulk damage limit, with a substantial fraction at 100%. Surfaces polished using first the Al2O3 polish and then an SiO2 polish exhibit surface damage values equal to the bulk damage value at nearly every point.
We also measured damage thresholds for different sized focal spots. Some earlier reports have claimed that damage thresholds depend strongly on the size of the focal spot, but we find the surface threshold is independent of the spot size.
C1 [Smith, Arlee; Do, Binh] Sandia Natl Labs, Laser Remote Sensing Plasma Complex Syst Sci Dept, Albuquerque, NM 87185 USA.
RP Smith, A (reprint author), Sandia Natl Labs, Laser Remote Sensing Plasma Complex Syst Sci Dept, POB 5800, Albuquerque, NM 87185 USA.
NR 7
TC 1
Z9 1
U1 2
U2 4
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7048-5
J9 P SOC PHOTO-OPT INS
PY 2008
VL 6873
BP U118
EP U129
PG 12
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Remote Sensing; Optics; Physics, Applied
SC Engineering; Science & Technology - Other Topics; Remote Sensing;
Optics; Physics
GA BHQ78
UT WOS:000255547100025
ER
PT B
AU Babar, MA
Northway, A
Gorton, I
Heuer, P
Nguyen, T
AF Babar, Muhammad Ali
Northway, Andrew
Gorton, Ian
Heuer, Paul
Nguyen, Thong
BE Bustard, DW
Sterritt, R
TI Introducing tool support for managing architectural knowledge: An
experience report
SO FIFTEENTH IEEE INTERNATIONAL CONFERENCE AND WORKSHOPS ON THE ENGINEERING
OF COMPUTER-BASED SYSTEMS, PROCEEDINGS
LA English
DT Proceedings Paper
CT 15th IEEE International Conference and Workshop on Engineering of
Computer-Based Systems
CY MAR 31-APR 04, 2008
CL Belfast, NORTH IRELAND
SP IEEE Comp Soc, TCECBS, Univ Ulster, Comp Sci Res Inst, Univ Ulster, Ctr Software Proc Technologies, Lero
ID DESIGN; DECISIONS; PATTERNS
AB Management of software architecture knowledge is vital for improving an organisation's architectural capabilities. Despite the recognition of the importance of capturing and reusing software architecture knowledge, there is currently no suitable support mechanism available. To address this issue, we have developed a conceptual framework for managing architecture design knowledge. A web-based knowledge management tool,. Process-based Architecture Knowledge Management Environment (PAKME), has been developed to support that framework. PAKME is being trialled to help systematise the architecture knowledge management and evaluation process of an industrial collaborator. This paper reports the objectives, logistics and initial findings of this project, Specifically we have deployed and used PAKME in an Australian Defence acquisition environment for evaluating architecture of a aircraft system.
C1 [Babar, Muhammad Ali] Univ Limerick, Limerick, Ireland.
[Northway, Andrew; Heuer, Paul; Nguyen, Thong] Air Operat Div Def Sci & Technol Org, Canberra, ACT, Australia.
[Gorton, Ian] Pacific Northwest Natl Lab, Richland, WA 99354 USA.
RP Babar, MA (reprint author), Univ Limerick, Limerick, Ireland.
EM malibaba@lero.ie; andrew.northway@dsto.defence.gov.au;
ian.gorton@pnl.gov; paul.heuer@dsto.defence.gov.au;
thong.nguyen@dsto.defence.gov.au
RI Gorton, Ian/A-8247-2009
FU Science Foundation Ireland [03/CE2/I303_1]
FX The first and third authors were working with the National ICT
Australia, when the reported work was carried out. Lero is supported by
Science Foundation Ireland (under grant no. 03/CE2/I303_1).
NR 28
TC 1
Z9 1
U1 0
U2 0
PU IEEE COMPUTER SOC
PI LOS ALAMITOS
PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 USA
BN 978-0-7695-3141-0
PY 2008
BP 105
EP +
DI 10.1109/ECBS.2008.27
PG 3
WC Computer Science, Hardware & Architecture; Computer Science, Information
Systems; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BHQ56
UT WOS:000255505000011
ER
PT S
AU Turk, MJ
Abel, T
O'Shea, BW
AF Turk, Matthew J.
Abel, Tom
O'Shea, Bfian W.
BE O'Shea, BW
Heger, A
Abel, T
TI Towards forming a primordial protostar in a cosmological AMR simulation
SO FIRST STARS III
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Conference on First Stars III
CY JUL 15-20, 2007
CL Santa Fe, NM
SP Los Alamos Natl Lab, New Mexico Consortium Inst Adv Study, Kavli Inst Particle Astrophys & Cosmol, Joint Inst Nucl Astrophys
DE population III stars; star formation
ID CDM UNIVERSE; STARS; HD
AB Modeling the formation of the first stars in the universe is a well-posed problem and ideally suited for computational investigation. We have conducted high-resolution numerical studies of the formation of primordial stars. Beginning with primordial initial conditions appropriate for a ACDM model, we used the Eulerian adaptive mesh refinement code (Enzo) to achieve unprecedented numerical resolution, resolving cosmological scales as well as sub-stellar scales simultaneously. Building on the work of Abel, Bryan and Norman (2002), we followed the evolution of the first collapsing cloud until molecular hydrogen is optically thick to cooling radiation. In addition, the calculations account for the process of collision-induced emission (CIE) and add approximations to the optical depth in both molecular hydrogen roto-vibrational cooling and CIE. Also considered are the effects of chemical heating/cooling from the formation/destruction of molecular hydrogen. We present the results of these simulations, showing the formation of a 10 Jupiter-mass protostellar core bounded by a strongly aspherical accretion shock. Accretion rates are found to be as high as one solar mass per year.
C1 [Turk, Matthew J.; Abel, Tom] Stanford Univ, KIPAC, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA.
[O'Shea, Bfian W.] Los Alamos Neutron Scattering Ctr, T 6, MS B227, Los Alamos, NM 87545 USA.
RP Turk, MJ (reprint author), Stanford Univ, KIPAC, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA.
FU US Department of Energy [DEAC52-06NA25396]; DOE LDRD [20051325PRD4,
20050031DR]; NSF CAREER [AST-0239709]; National Science Foundation
FX We thank Stuart Marshall and the SLAC HPC Computing Team for their
support. These simulations were carried out on red, an SGI Altix located
at SLAC. This work was carried out in part by MJT and BWO under the
auspices of the National Nuclear Security Administration of the US
Department of Energy at Los Alamos National Laboratory under Contract
No. DEAC52-06NA25396 and was supported by DOE LDRD grants 20051325PRD4
and 20050031DR, with further support from a NSF CAREER award AST-0239709
from the National Science Foundation. Additionally, we would like to
thank Greg Bryan, Simon Glover, Mike Norman, Emanuele Ripamonti, Didier
Saumon, Britton Smith, and John Wise for helpful discussions.
NR 17
TC 7
Z9 7
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0509-7
J9 AIP CONF PROC
PY 2008
VL 990
BP 16
EP +
PG 2
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA BHN31
UT WOS:000254472200002
ER
PT S
AU Xu, H
Collins, DC
Norman, ML
Li, S
Li, H
AF Xu, Hao
Collins, David C.
Norman, Michael L.
Li, Shengtai
Li, Hui
BE O'Shea, BW
Heger, A
Abel, T
TI A cosmological AMR MHD module for Enzo
SO FIRST STARS III
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Conference on First Stars III
CY JUL 15-20, 2007
CL Santa Fe, NM
SP Los Alamos Natl Lab, New Mexico Consortium Inst Adv Study, Kavli Inst Particle Astrophys & Cosmol, Joint Inst Nucl Astrophys
DE cosmology : theory; magnetohydrodynamics; methods : numerical
ID MAGNETIC TOWER JETS; STAR; HYDRODYNAMICS; UNIVERSE; FIELDS
AB Magnetic fields play an important role in almost all astrophysical phenomena, including star formation. Due to the difficulty of analytic modeling and observations, magnetic fields are still poorly studied, and numerical simulation has become a major tool. We have implemented a cosmological magnetohydrodynamics package for Enzo, an AMR hydrodynamics code designed to simulate structure formation. We use the TVD solver developed by S. Li as the base solver. In addition, we employ the constrained transport (CT) algorithm as described by D. Balsara. For interpolating magnetic fields to fine grids we used a divergence free quadratic reconstruction, also described by Balsara. We present results from several test problems including MHD caustics, MHD pancakes, and galaxy cluster formation with magnetic fields. We also discuss possible applications of our AMR MHD code to first star research.
C1 [Xu, Hao; Collins, David C.; Norman, Michael L.] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA.
[Xu, Hao; Collins, David C.; Norman, Michael L.] Univ Calif San Diego, CASS, La Jolla, CA 92093 USA.
[Xu, Hao; Li, Hui] Los Alamos Natl Lab, Theoret Astrophys, Los Alamos, NM USA.
[Li, Shengtai] Los Alamos Natl Lab, Math Modeling & Anal, Los Alamos, NM USA.
RP Xu, H (reprint author), Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA.
RI Xu, Hao/B-8734-2014
OI Xu, Hao/0000-0003-4084-9925
FU IGPP at Los Alamos National Laboratory.
FX This research was supported by IGPP at Los Alamos National Laboratory.
NR 15
TC 3
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U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0509-7
J9 AIP CONF PROC
PY 2008
VL 990
BP 36
EP +
PG 2
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA BHN31
UT WOS:000254472200007
ER
PT S
AU Smith, B
Sigurdsson, S
O'Shea, B
Norman, M
AF Smith, Britton
Sigurdsson, Steinn
O'Shea, Brian
Norman, Michael
BE O'Shea, BW
Heger, A
Abel, T
TI The role of the first metals in forming the second stars
SO FIRST STARS III
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Conference on First Stars III
CY JUL 15-20, 2007
CL Santa Fe, NM
SP Los Alamos Natl Lab, New Mexico Consortium Inst Adv Study, Kavli Inst Particle Astrophys & Cosmol, Joint Inst Nucl Astrophys
DE star formation
ID CDM UNIVERSE; FRAGMENTATION; METALLICITY; CLOUDS; GAS
AB Numerical simulations of the formation of pop III stars suggest that they were much more massive than the pop II and pop I stars observed today. This is due to the collapse dynamics of metal-free gas, which is regulated by the radiative cooling properties of molecular hydrogen. We study how the collapse of gas-clouds is altered by the addition of metals to the star-forming environment. We perform a series of numerical simulations of pre-enriched star-formation at various metallicitics using the adaptive mesh refinement, hydrodynamic + N-body code, Enzo. For metallicities below the critical metallicity, Z(cr), collapse proceeds nearly identical to the metal-free case, and only massive, singular objects form. For metallicities well above Z(cr), efficient cooling rapidly lowers the gas temperature to the temperature of the cosmic microwave background (CMB), which is significantly higher in the distant past. The gas is physically unable to radiatively cool below the CUB temperature, and thus, becomes very thermally stable. For moderately high metallicities, Z >= 10(-3.5) Z(circle dot), this occurs early in the evolution of the gas-cloud, when the central density is still relatively low. The resulting cloud-cores show little or no fragmentation, and have mass-scales of a few hundred M-circle dot On the other hand, if the metallicity is only slightly above Z(cr), the cloud slowly cools without ever reaching the CUB temperature. In this case, the minimum cloud temperature is achieved at much higher densities than in the high-metallicity case, resulting in mass-scales of just a few M-circle dot.
C1 [Smith, Britton; Sigurdsson, Steinn] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA.
[O'Shea, Brian] Los Alamos Natl Lab, Los Alamos, NM USA.
[Norman, Michael] Univ Calif San Diego, Ctr Astrophy & Space Sci, La Jolla, CA 92093 USA.
RP Smith, B (reprint author), Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA.
OI Sigurdsson, Steinn/0000-0002-8187-1144
FU Hubble Space Telescope Theory [HST-AR-10978.01]
FX We thank Jason Tumlinson for useful discussions. Computer resources were
provided by the San Diego Supercomputer Center This research was
supported by Hubble Space Telescope Theory Grant HST-AR-10978.01.
NR 15
TC 0
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PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0509-7
J9 AIP CONF PROC
PY 2008
VL 990
BP 73
EP +
PG 2
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA BHN31
UT WOS:000254472200013
ER
PT S
AU Krugler, JA
Beers, TC
Lee, YS
Sivarani, T
Marsteller, B
Wilhelm, R
Prieto, CA
Frebel, A
Norris, JE
Johnson, J
Ivans, I
Yanny, B
Rockosi, C
Morrison, H
Newberg, HJ
Knapp, J
AF Krugler, Julie A.
Beers, T. C.
Lee, Y. S.
Sivarani, T.
Marsteller, B.
Wilhelm, R.
Prieto, C. Allende
Frebel, A.
Norris, J. E.
Johnson, J.
Ivans, I.
Yanny, B.
Rockosi, C.
Morrison, H.
Newberg, H. J.
Knapp, J.
BE O'Shea, BW
Heger, A
Abel, T
TI Revised parameter estimates for the most metal-poor candidates in SDSS-I
and SEGUE
SO FIRST STARS III
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Conference on First Stars III
CY JUL 15-20, 2007
CL Santa Fe, NM
SP Los Alamos Natl Lab, New Mexico Consortium Inst Adv Study, Kavli Inst Particle Astrophys & Cosmol, Joint Inst Nucl Astrophys
DE milky Way; galactic halo; metal-poor stars; wide-angle spectroscopic
surveys
AB There are several hundred thousand R = 2000 stellar spectra reported in the final public release of the Sloan Digital Sky Survey (SDSS-I) and the continuing project SEGUE (Sloan Extension for Galactic Exploration and Understanding), which has completed roughly half of its scheduled set of observations to date. The stars in this sample were targeted for a wide variety of reasons, and hence do not represent a sample from which an unbiased metallicity distribution function (MDF) of stars in the halo or thick-disk populations may be drawn. However, there exist over 6500 stars with estimated metallicities [Fe/H] < -2.0 and effective temperatures in the range 4500 K < T-eff < 7000 K among this sample, based on application of the SDSS/SEGUE spectroscopic parameter analysis pipeline. We have continued to refine estimates of the stellar parameters for these stars, using an automated synthetic spectrum approach, autoMOOG. This technique produces estimates of [Fe/H] as well as [C/Fe] (or upper limits on these quantities) based on MOOG syntheses of the region of spectrum around the CaII K line and the CH G band, respectively. This sample represents, by a factor of more than three, the largest database of very metal-poor stars yet assembled. A least 1000 of these stars have g < 16.5, and hence are amenable to high-resolution spectroscopic studies with presently available large-aperture telescopes.
C1 [Krugler, Julie A.; Beers, T. C.; Lee, Y. S.; Sivarani, T.; Marsteller, B.] Michigan State Univ, Dept Phys & Astron, CSCE, E Lansing, MI 48824 USA.
[Wilhelm, R.] Texas Tech Univ, Dept Phys, Lubbock, TX 79409 USA.
[Prieto, C. Allende; Frebel, A.] Univ Texas Austin, Dept Astron, Austin, TX 78712 USA.
[Norris, J. E.] Australian Natl Univ, Res Sch Astron & Astrophys, Weston, ACT, Australia.
[Johnson, J.] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA.
[Ivans, I.] Observ Carnegie Inst Washington, Pasadena, CA 91101 USA.
[Ivans, I.; Knapp, J.] Princeton Univ Observ, Princeton, NJ 08544 USA.
[Yanny, B.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
[Rockosi, C.] Univ Calif Santa Cruz, Lick Observ, Santa Cruz, CA 95064 USA.
[Morrison, H.] Case Western Reserve Univ, Dept Astron, Cleveland, OH 44106 USA.
[Newberg, H. J.] Rensselaer Polytech Inst, Dept Phys Astron, Troy, NY 12180 USA.
RP Krugler, JA (reprint author), Michigan State Univ, Dept Phys & Astron, CSCE, E Lansing, MI 48824 USA.
FU Alfred P. Sloan Foundation; National Science Foundation; U.S. Department
of Energy; National Aeronautics and Space Administration; Japanese
Monbukagakusho; Max Planck Society; Higher Education Funding Council for
England; AST [04-06784, 07-07776]; PHY [02-16783]; Physics Frontier
Centers/JINA: Joint Institute for Nuclear Astrophysics; U.S. National
Science Foundation
FX Funding for the SDSS and SDSS-II has been provided by the Alfred P.
Sloan Foundation, the Participating Institutions, the National Science
Foundation, the U.S. Department of Energy, the National Aeronautics and
Space Administration, the Japanese Monbukagakusho, the Max Planck
Society, and the Higher Education Funding Council for England. The SDSS
Web Site is http://www.sdss.org/. The SDSS is managed by the
Astrophysical Research Consortium for the Participating Institutions.
The Participating Institutions are the American Museum of Natural
History, Astrophysical Institute Potsdam, University of Basel,
University of Cambridge, Case Western Reserve University, University of
Chicago, Drexel University, Fermilab, the Institute for Advanced Study,
the Japan Participation Group, Johns Hopkins University, the Joint
Institute for Nuclear Astrophysics, the Kavh Institute for Particle
Astrophysics and Cosmology, the Korean Scientist Group, the Chinese
Academy of Sciences (LAMOST), Los Alamos National Laboratory, the
Max-Planck-Institute for Astronomy (MPIA), the Max-Planck-Institute for
Astrophysics (MPA), New Mexico State University, Ohio State University,
University of Pittsburgh, University of Portsmouth, Princeton
University, the United States Naval Observatory, and the University of
Washington. J. .A.K., T. C. B, Y. S. L., T S., and B. M. acknowledge
support from grants AST 04-06784, AST 07-07776, and PHY 02-16783,
Physics Frontier Centers/JINA: Joint Institute for Nuclear Astrophysics,
awarded by the U.S. National Science Foundation.
NR 4
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PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0509-7
J9 AIP CONF PROC
PY 2008
VL 990
BP 151
EP +
PG 2
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA BHN31
UT WOS:000254472200030
ER
PT S
AU Onifer, AJ
AF Onifer, A. J.
BE O'Shea, BW
Heger, A
Abel, T
TI Population III Wolf-Rayet stars in the CAK regime
SO FIRST STARS III
SE AIP CONFERENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT International Conference on First Stars III
CY JUL 15-20, 2007
CL Santa Fe, NM
SP Los Alamos Natl Lab, New Mexico Consortium Inst Adv Study, Kavli Inst Particle Astrophys & Cosmol, Joint Inst Nucl Astrophys
DE Wolf-Rayet stars; stellar winds; mass loss; radiative transfer;
population III stars
ID WINDS; OPACITY
AB Wolf-Rayet (WR) stars near solar metallicity are believed to be driven by radiation pressure on the LTV spectral lines of metal ions. As the metallicity decreases so does the line opacity, therefore the mass-loss rate. However, since the composition of a WR atmosphere is determined by the burn products of the core, there is a lower limit on the line opacity and therefore the mass-loss rate - of a WR star, even in a star with zero initial metallicity. This presentation is the result of attempt to calculate the mass-loss rate of a Population III-type WO star using a modified version of the CAK approximation. We find that n(e) >= 10(13) cm(-3) and 0.5 <= Gamma <= 0.7 give the most plausible results, with the resulting mass-loss rate between 2 x 10(-9) M center dot yr(-1) and 3 x 10(-8) M center dot yr(-1).
C1 Los Alamos Natl Lab, Los Alamos, NM 87544 USA.
RP Onifer, AJ (reprint author), Los Alamos Natl Lab, POB 1663,MS T087, Los Alamos, NM 87544 USA.
NR 11
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PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0509-7
J9 AIP CONF PROC
PY 2008
VL 990
BP 247
EP 249
PG 3
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA BHN31
UT WOS:000254472200057
ER
PT S
AU Joggerst, CC
Heger, A
Woosley, SE
AF Joggerst, Candace Church
Heger, Alexander
Woosley, Stanford E.
BE O'Shea, BW
Heger, A
Abel, T
TI Multidimensional simulations of mixing in zero- and solar-metallicity
SNe
SO FIRST STARS III
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Conference on First Stars III
CY JUL 15-20, 2007
CL Santa Fe, NM
SP Los Alamos Natl Lab, New Mexico Consortium Inst Adv Study, Kavli Inst Particle Astrophys & Cosmol, Joint Inst Nucl Astrophys
DE supernovae; hydrodynamics
ID MASSIVE STARS; CODE; HYDRODYNAMICS; EVOLUTION; FLASH
AB We present multidimensional simulations of zero- and solar-metallicity stars in the last stages of their lives and estimate their resulting nucleosynthetic output. When primordial stars with masses less than about 100 solar masses explode as supernovae, some portion of the star falls back onto the black hole, while the rest escapes to enrich the next generation of stars. The composition of the escaped gas depends on processes that cannot be adequately modeled in one dimension. Multidimensional simulations are needed to capture the inherently asymmetric processes that enrich the outer layers of the star and determine its final yield. We investigate the effects of Rayleigh-Taylor-induced mixing and asymmetries in the explosion on the final composition of the escaped gas. For spherically symmetric explosions, we find that Rayleigh-Taylor-induced mixing has little effect on the shells interior to oxygen, and so very little material interior to the oxygen shell goes on to enrich the interstellar medium. Some asymmetry in the explosion is needed in order for elements interior to oxygen to escape from the star in significant amounts.
C1 [Joggerst, Candace Church; Woosley, Stanford E.] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95060 USA.
[Heger, Alexander] Los Alamos Natl Lab, Theoret Astrophys T6, Los Alamos, NM 87545 USA.
RP Joggerst, CC (reprint author), Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95060 USA.
FU DOE Program for Sci-entific Discovery through Advanced Computing
[DE-FC02-01ER41176]; ASC/Alliance center for Astrophysical Thermonuclear
Flashes at the University of Chicago
FX This work was supporter by the DOE Program for Sci-entific Discovery
through Advanced Computing (Sci-DAC ; DE-FC02-01ER41176) . The software
used in this work was in part developed by the DOE-supported
ASC/Alliance center for Astrophysical Thermonuclear Flashes at the
University of Chicago.
NR 13
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PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0509-7
J9 AIP CONF PROC
PY 2008
VL 990
BP 257
EP +
PG 2
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA BHN31
UT WOS:000254472200060
ER
PT S
AU Kasen, D
Heger, A
Woosley, S
AF Kasen, Daniel
Heger, Alex
Woosley, Stan
BE O'Shea, BW
Heger, A
Abel, T
TI The first stellar explosions: Theoretical light curves and spectra of
pair-instability supernovae
SO FIRST STARS III
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Conference on First Stars III
CY JUL 15-20, 2007
CL Santa Fe, NM
SP Los Alamos Natl Lab, New Mexico Consortium Inst Adv Study, Kavli Inst Particle Astrophys & Cosmol, Joint Inst Nucl Astrophys
DE supernovae; radiative transfer; population III
ID POPULATION III; STARS; FRAGMENTATION
AB The first generation of stars likely consisted of massive objects (M > 100 M center dot) which suffered minimal mass loss, setting the stage for an impressive first generation of stellar explosions. For the initial mass range (140 < M < 260 M center dot) stars die in a thermonuclear runaway triggered by the pair production instability. Such supernova events can be remarkably energetic (similar to 10(53) ergs) and some may synthesize considerable amounts of radioactive isotopes (similar to 50 M center dot of Ni-56). We have calculated broadband light curves and spectral time-series for a number of pair-instability supernova models, spanning a range of initial masses and degrees of mass loss. Here we briefly discuss the observable properties and potential detectability of a few representative models.
C1 [Kasen, Daniel] Johns Hopkins Univ, Baltimore, MD 21218 USA.
[Kasen, Daniel] Space Telescope Sci Inst, Baltimore, MD 21218 USA.
[Kasen, Daniel; Heger, Alex; Woosley, Stan] Univ Calif Santa Cruz, Dept Phys & Astron, Santa Cruz, CA 95064 USA.
[Heger, Alex] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Kasen, D (reprint author), Johns Hopkins Univ, Baltimore, MD 21218 USA.
FU JHU/STScl; NASA through Hubble [HST-HF-01208.01-A]; Space Telescope
Science Institute; Association of Universities for Research in Astronomy
, Inc., for NASA [NAS5-26555]; DOE SciDAC [DE FC02-0641438]; LLNL on the
ATLA S machine; ORNL through an INCITE; NERSC
FX DNK received support from the Alan C. Davis fellowship at JHU/STScl and
from NASA through Hubble Fellow-ship grant HST-HF-01208.01-A awarded by
the Space Telescope Science Institute , which is operated by the
Association of Universities for Research in Astronomy , Inc., for NASA ,
under contract NAS5-26555. Support for this work was provided by the DOE
SciDAC Program under grant DE FC02-0641438 . We are grateful for com -
puter time provided by LLNL on the ATLA S machine, by ORNL through an
INCITE award, and by NERSC .
NR 15
TC 5
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U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0509-7
J9 AIP CONF PROC
PY 2008
VL 990
BP 263
EP +
PG 2
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA BHN31
UT WOS:000254472200062
ER
PT S
AU Surman, R
McLaughlin, GC
Sabbatino, N
Hix, WR
AF Surman, R.
McLaughlin, G. C.
Sabbatino, N.
Hix, W. R.
BE O'Shea, BW
Heger, A
Abel, T
TI Nucleosynthesis in outflows from Kerr black hole accretion disks
SO FIRST STARS III
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Conference on First Stars III
CY JUL 15-20, 2007
CL Santa Fe, NM
SP Los Alamos Natl Lab, New Mexico Consortium Inst Adv Study, Kavli Inst Particle Astrophys & Cosmol, Joint Inst Nucl Astrophys
DE accretion disks; gamma-ray bursts; nucleosynthesis
ID GAMMA-RAY BURSTS; EXPLOSIVE NUCLEOSYNTHESIS; PROGENITORS; HYPERNOVAE;
JET; SUPERNOVAE; COLLAPSARS; NEUTRINOS
AB Observational evidence suggests long-duration, collapsar-type gamma-ray bursts (GRBs) may have been more common in the early universe. These events are thought to be powered by accretion disks around black holes (AD-BHs). While GRBs require AD-BHs, not all AD-BHs will power bursts and therefore their formation will be more common than GRBs themselves. Outflows from AD-BHs may therefore be important contributors to the nuclear abundances in the oldest stars, particularly for rare species or those not uniformly observed. Here we consider the nucleosynthesis in this environment starting with relativistic disk models of Kerr black holes and following the element synthesis in a parameterized outflow. We present nucleosynthesis results from a range of AD-BH models.
C1 [Surman, R.; Sabbatino, N.] Union Coll, Dept Phys & Astron, Schenectady, NY 12308 USA.
[McLaughlin, G. C.] North Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA.
[Hix, W. R.] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37830 USA.
RP Surman, R (reprint author), Union Coll, Dept Phys & Astron, Schenectady, NY 12308 USA.
RI Hix, William/E-7896-2011
OI Hix, William/0000-0002-9481-9126
FU Department of Energy [DE-FG05-05ER41398, DE-FG02-02ER41216]
FX This work was partially supported by the Department of Energy under
contracts DE-FG05-05ER41398 (RS) and DE-FG02-02ER41216 (GCM) .
NR 29
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U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0509-7
J9 AIP CONF PROC
PY 2008
VL 990
BP 297
EP +
PG 2
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA BHN31
UT WOS:000254472200068
ER
PT S
AU Woodward, P
Herwig, F
Porter, D
Fuchs, T
Nowatzki, A
Pignatari, M
AF Woodward, Paul
Herwig, Falk
Porter, David
Fuchs, Tyler
Nowatzki, Anthony
Pignatari, Marco
BE O'Shea, BW
Heger, A
Abel, T
TI Nuclear burning and mixing in the first stars: Entrainment at a
convective boundary using the PPB advection scheme
SO FIRST STARS III
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Conference on First Stars III
CY JUL 15-20, 2007
CL Santa Fe, NM
SP Los Alamos Natl Lab, New Mexico Consortium Inst Adv Study, Kavli Inst Particle Astrophys & Cosmol, Joint Inst Nucl Astrophys
DE first stars : nucleosynthesis; mixing; hydrodynamics
ID METAL-POOR STARS; GIANT BRANCH STARS; INTERMEDIATE-MASS STARS; AGB
STARS; S-PROCESS; STELLAR EVOLUTION; DREDGE-UP; LOW-METALLICITY;
POPULATION-III; HELIUM FLASH
AB The evolution of the first generations of stars at zero or extremly low metallicity, and especially some crucial properties like the primary N-14 production, is charactarized by convective-reactive mixing events that are mostly absent from similar evolution phases at solar-like metallicity. These episodes occur when unprocessed H-rich material is mixed accross a convective boundary into (12)Crich He-burning material, as for example in He-shell flashes of extremely-low metallicity AGB stars. In this paper, we describe the astrophysical context of such convective-reactive events, including the difficulty of current one-dimensional stellar evolution models to correctly simulate these evolutionary phases. We then describe the requirements and current state of modeling convective-reactive processes in the first stars environment. We demonstrate some of the new concepts that we are applying to this problem, i.e. the highly accurate PPB advection scheme in the framework of PPM hydrodynamic simulations of mixing across a very stiff convective boundary. We show initial results of such simulations that address the first non-reactive step of this problem, which is the entrainment of H at the top boundary of the He-shell flash convection zone.
C1 [Woodward, Paul; Porter, David; Fuchs, Tyler; Nowatzki, Anthony] Univ Minnesota, Lab Computat Sci & Engn, Minneapolis, MN 55455 USA.
[Herwig, Falk; Pignatari, Marco] Keele Univ, Sch Phys & Geograph Sci, Astrophys Grp, Keele, Staffs, England.
[Herwig, Falk] Los Alamos Natl Lab, T Div, Los Alamos, NM USA.
RP Woodward, P (reprint author), Univ Minnesota, Lab Computat Sci & Engn, Minneapolis, MN 55455 USA.
OI Pignatari, Marco/0000-0002-9048-6010
FU University of Minnesota [DE-FG02-03ER25569]; DoE Office of Science; NSF
[CNS-0224424, CNS-0421423]; Minnesota Supercomputing Institute;
University of Minnesota's Digital Technology Center; EU Marie Curie
[MIRG-CT-2006-046520]
FX The work reported here has been supported at the University of Minnesota
by grant DE-FG02-03ER25569 from the MICS program of the DoE Office of
Science, by NSF equipment grants CNS-0224424 and CNS-0421423, and by the
Minnesota Supercomputing Institute, a part of the University of
Minnesotas Digital Technology Center. Funding for this work was also
provided through EU Marie Curie grant MIRG-CT-2006-046520. FH is
Affiliate of the Theoretical Astrophysics Group in TDivision at LANL,
and acknowledges continued collaborative support. We would like to thank
Raphael Hirschi for extremely useful discussions. Brian OShea and the
other organizers of the FSIII meeting have to be thanked for their
enourmous flexibility to deal with various lastminute issues we imposed
on them.
NR 53
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PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0509-7
J9 AIP CONF PROC
PY 2008
VL 990
BP 300
EP +
PG 2
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA BHN31
UT WOS:000254472200069
ER
PT S
AU Farouqi, K
Kratz, KL
Cowan, JJ
Mashonkina, LI
Pfeiffer, B
Sneden, C
Thielemann, FK
Truran, JW
AF Farouqi, K.
Kratz, K. -L.
Cowan, J. J.
Mashonkina, L. I.
Pfeiffer, B.
Sneden, C.
Thielemann, F. -K.
Truran, J. W.
BE O'Shea, BW
Heger, A
Abel, T
TI Nucleosynthesis modes in the high-entropy-wind scenario of type II
supernovae
SO FIRST STARS III
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Conference on First Stars III
CY JUL 15-20, 2007
CL Santa Fe, NM
SP Los Alamos Natl Lab, New Mexico Consortium Inst Adv Study, Kavli Inst Particle Astrophys & Cosmol, Joint Inst Nucl Astrophys
DE r-process nucleosynthesis; low metallicity stars; core collapse
supernovae
ID NEUTRINO-DRIVEN WINDS; R-PROCESS NUCLEOSYNTHESIS; NUCLEAR-PHYSICS;
STARS; ELEMENTS; ABUNDANCES; TEMPERATURES; STABILITY; CAPTURE; EJECTA
AB In an attempt to constrain the astrophysical conditions for the nucleosynthesis of the classical r-process elements beyond Fe, we have performed large-scale dynamical network calculations within the model of an adiabatically expanding high-entropy wind (HEW) of type II supernovae (SN II). A superposition of several entropy-components (S) with model-inherent weightings results in an excellent reproduction of the overall Solar System (SS) isotopic r-process residuals (Nr,center dot), as well as the more recent observations of elemental abundances of metal-poor, r-process rich halo stars in the early Galaxy. For the heavy r-process elements beyond Sn, our HEW model predicts a robust abundance pattern up to the Th, U r-chronometer region. For the lighter neutron-capture region, an S-dependent superposition of (i) a normal alpha-component directly producing stable nuclei, including s-only isotopes, and (ii) a component from a neutron-rich alpha-freezeout followed by the rapid recapture of beta-delayed neutrons (beta dn) emitted from the far-unstable seed nuclei is indicated. In agreement with several recent halostar observations in the 60 < A < 110 region, our HEW model confirms a Z-dependent non-correlation, respectively partial correlation with the heavier "main" r-process elements.
C1 [Farouqi, K.; Kratz, K. -L.; Pfeiffer, B.] HGF Virtuelles Inst Struktur Kerne & Nukl Astroph, D-55128 Mainz, Germany.
[Farouqi, K.; Truran, J. W.] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA.
[Kratz, K. -L.] Max Planck Inst Chem, D-55128 Mainz, Germany.
[Cowan, J. J.] Univ Oklahoma, Homer L Dodge Dept Phys & Astron, Norman, OK 73019 USA.
[Mashonkina, L. I.] Russian Acad Sci, Astron Inst, Moscow 119017, Russia.
[Sneden, C.] Univ Texas Austin, Depat Astron & McDonald Observ, Austin, TX 78712 USA.
[Thielemann, F. -K.] Univ Basel, Dept Phys Astron, CH-4056 Basel, Switzerland.
[Truran, J. W.] Argonne Natl Lab, Argonne, IL 60439 USA.
RP Farouqi, K (reprint author), HGF Virtuelles Inst Struktur Kerne & Nukl Astroph, D-55128 Mainz, Germany.
FU National Science Foundation [AST 07-07447, AST-0607708]; Physics
Frontier Center (JINA) [PHY 02-16783]; DOE [B341495]; Deutscfie
Forschungsgemeinschaft (DFG) [KR 806/13-1]; Helmholtz Gemeinschaft
[VH-VI-061]
FX This work has been supported in part by the National Science Foundation
under grants AST 07-07447 (J.J.C), AST-0607708 (C.S.), and the Physics
Frontier Center (JINA) PHY 02-16783 (J. W.T.), and the DOE under
contract B341495 (J.W.T.). Support was also provided by the Deutscfie
Forschungsgemeinschaft (DFG) under contract KR 806/13-1, and the
Helmholtz Gemeinschaft under grant VH-VI-061. The authors thank Roberto
Gallino for helpful discussions.
NR 32
TC 10
Z9 11
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0509-7
J9 AIP CONF PROC
PY 2008
VL 990
BP 309
EP +
PG 2
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA BHN31
UT WOS:000254472200070
ER
PT S
AU Whalen, D
O'Shea, BW
Smidt, J
Norman, ML
AF Whalen, Daniel
O'Shea, Brian W.
Smidt, Joseph
Norman, Michael L.
BE O'Shea, BW
Heger, A
Abel, T
TI Photoionization of clustered halos by the first stars
SO FIRST STARS III
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT International Conference on First Stars III
CY JUL 15-20, 2007
CL Santa Fe, NM
SP Los Alamos Natl Lab, New Mexico Consortium Inst Adv Study, Kavli Inst Particle Astrophys & Cosmol, Joint Inst Nucl Astrophys
DE stars : formation; HII regions; large-scale structure of the universe
ID PRIMORDIAL STAR; HII REGION; FEEDBACK; PHOTODISSOCIATION; IONIZATION;
CHEMISTRY; REDSHIFT; UNIVERSE
AB We present numerical simulations of the photoevaporation of cosmological halos clustered around a 120 M-circle dot primordial star, confining our study to structures capable of hosting Population III star formation. The calculations include self-consistent multifrequency conservative transfer of UV photons together with nine-species primordial chemistry and all relevant radiative processes. The ultimate fates of these halos varies with central density and proximity to the central source but generally fall into one of four categories. Diffuse halos with central densities below 2 - 3 cm(-3) are completely ionized and evaporated by the central star anywhere in the cluster. More evolved halo cores at densities above 2000 cm(-3) are impervious to both ionizing and Lyman-Werner flux at most distances from the star and collapse of their cores proceeds without delay. Radiative feedback in halos of intermediate density can be either positive or negative, depending on how the I-front remnant shock both compresses and deforms the core and enriches it with H-2. We find that the 120 M-circle dot star photodissociates H-2 in most halos within the cluster but that catalysis by H- rapidly restores molecular hydrogen within a few hundred Kyr after the death of the star, with little delay in star formation. Our models exhibit significant departures from previous one-dimensional spherically-symmetric simulations, which are prone to serious errors due to unphysical geometric focusing effects.
C1 [Whalen, Daniel] Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
[O'Shea, Brian W.] Los Alamos Natl Lab, Theoret Astrophys T 6, POB 1663, Los Alamos, NM 87545 USA.
[Smidt, Joseph] Brigham Young Univ, Dept Phys & Astron, Provo, UT 84602 USA.
[Norman, Michael L.] Univ Calif San Diego, Ctr Astrophys & Space Sci, La Jolla, CA 92093 USA.
RP Whalen, D (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
FU U.S.Department of Energyat Los Alamos National Laboratory
[DE-AC52-06NA25396]; NCSA under NRAC [MCA98N020]
FX DW thanks Tom Abel, Kyungjin Ahn, Greg Bryan and Alex Heger for helpful
discussions concerning these simulations.This work was carried out under
the auspices of the National Nuclear Security Administration of the
U.S.Department of Energyat Los Alamos National Laboratory under Contract
No. DE-AC52-06NA25396.The simulations were performed at SDSC and NCSA
under NRAC allocation MCA98N020 and at Los Alamos National Laboratory.
NR 20
TC 2
Z9 2
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0509-7
J9 AIP CONF PROC
PY 2008
VL 990
BP 381
EP +
PG 2
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA BHN31
UT WOS:000254472200085
ER
PT S
AU Reed, D
AF Reed, Darren
BE O'Shea, BW
Heger, A
Abel, T
TI Halo and galaxy clustering in the early universe
SO FIRST STARS III
SE AIP CONFERENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT International Conference on First Stars III
CY JUL 15-20, 2007
CL Santa Fe, NM
SP Los Alamos Natl Lab, New Mexico Consortium Inst Adv Study, Kavli Inst Particle Astrophys & Cosmol, Joint Inst Nucl Astrophys
DE Population III stars; halo clustering
ID DARK-MATTER HALOES; SCALE; MODEL
AB Using an array of dark matter simulations, we explore the clustering properties of high redshift halos, including those large enough to host stars or galaxies. The simulations resolve down to the "mini-halo" mass scale at redshifts as high as 30, thus encompassing the expected full mass range of halos capable of hosting luminous objects and sources of reionization. Results are compared with analytical expectations, and implications for reionization are discussed.
C1 Los Alamos Natl Lab, Theoret Astrophys Grp, Los Alamos, NM 87545 USA.
RP Reed, D (reprint author), Los Alamos Natl Lab, Theoret Astrophys Grp, POB 1663, Los Alamos, NM 87545 USA.
NR 11
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0509-7
J9 AIP CONF PROC
PY 2008
VL 990
BP 467
EP 469
PG 3
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA BHN31
UT WOS:000254472200105
ER
PT J
AU Coutant, C
AF Coutant, Chuck
TI Thermal workshop revives interest in water temperatures
SO FISHERIES
LA English
DT Editorial Material
C1 [Coutant, Chuck] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
EM ccoutant3@comcast.net
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER FISHERIES SOC
PI BETHESDA
PA 5410 GROSVENOR LANE SUITE 110, BETHESDA, MD 20814-2199 USA
SN 0363-2415
J9 FISHERIES
JI Fisheries
PD JAN
PY 2008
VL 33
IS 1
BP 29
EP 30
PG 2
WC Fisheries
SC Fisheries
GA 271XA
UT WOS:000253820800007
ER
PT B
AU Okhuysen, BS
Riahi, DN
AF Okhuysen, B. S.
Riahi, D. N.
BE Sohrab, SH
Catrakis, HJ
Kobasko, N
Necasova, S
Markatos, N
TI On Compositional Convection in Mushy Layers with Permeable Interface
SO FMA'08: PROCEEDINGS OF THE 6TH IASME/WSEAS INTERNATIONAL CONFERENCE ON
FLUID MECHANICS AND AERODYNAMICS: NEW ASPECTS OF FLUID MECHANICS AND
AERODYNAMICS
SE WSEAS Mechanical Engineering Series
LA English
DT Proceedings Paper
CT 6th IASME/WSEAS International Conference on Fluid Mechanics and
Aerodynamics
CY AUG 20-22, 2008
CL Rhodes, GREECE
SP IASME, WSEAS
DE convective flow; flow stability; buoyant flow; mushy layer; buoyant
convection; dendrite layer; convective stability; flow bifurcation
ID NONLINEAR-ANALYSIS; BINARY-ALLOYS; SOLIDIFICATION
AB We consider the problem of weakly nonlinear compositional convection in horizontal mushy layers with permeable interface. The investigation, which is based on a newly developed model by the same authors, determines the results for the mushy layers with either uniform or non-uniform permeability. The motivation for this study is to determine the results that can provide useful information about the effect of permeability on the flow features. Using perturbation analysis and some numerical calculations, we determine the steady solutions to the weakly nonlinear problem under certain range of the parameter values where such analyses are valid. We find, in particular, that depending on the range of values of the parameters, the effect of permeability is to make the convection more likely in the form of either down-hexagons, with down-flow at the cells' centers and up-flow at the cells' boundaries, or supercritical non-hexagons.
C1 [Riahi, D. N.] Univ Texas Pan Amer, Dept Math, 1201 W Univ Dr, Edinburg, TX 78541 USA.
[Okhuysen, B. S.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Riahi, DN (reprint author), Univ Texas Pan Amer, Dept Math, 1201 W Univ Dr, Edinburg, TX 78541 USA.
EM driahi@utpa.edu
NR 9
TC 0
Z9 0
U1 0
U2 0
PU WORLD SCIENTIFIC AND ENGINEERING ACAD AND SOC
PI ATHENS
PA AG LOANNOU THEOLOGOU 17-23, 15773 ZOGRAPHOU, ATHENS, GREECE
BN 978-960-6766-98-5
J9 WSEAS MECH ENG SER
PY 2008
BP 99
EP +
PG 2
WC Engineering, Aerospace; Engineering, Mechanical; Mechanics
SC Engineering; Mechanics
GA BIL44
UT WOS:000260495700011
ER
PT J
AU Vanhaecke, L
Knize, MG
Noppe, H
De Brabander, H
Verstraete, W
Van de Wiele, T
AF Vanhaecke, L.
Knize, M. G.
Noppe, H.
De Brabander, H.
Verstraete, W.
Van de Wiele, T.
TI Intestinal bacteria metabolize the dietary carcinogen
2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine following consumption of
a single cooked chicken meal in humans
SO FOOD AND CHEMICAL TOXICOLOGY
LA English
DT Article
DE heterocyclic aromatic amines; LC/MS/MS; meat; Salmonella/microsome
assays; in vivo
ID HETEROCYCLIC AROMATIC-AMINES;
2-AMINO-1-METHYL-6-PHENYLIMIDAZO<4,5-B>PYRIDINE PHIP; CYTOCHROME
P4501A2; LIVER-MICROSOMES; PYRIDINE PHIP; HUMAN URINE; IDENTIFICATION;
MUTAGENS; CANCER; FOOD
AB 2-Amino-1-methyl-6-phenylimidazo[4,5-b]pyridine (PhIP) is a carcinogenic heterocyclic amine formed in meats during cooking. Although the formation of PhIP metabolites by mammalian enzymes has been extensively reported, the involvement of the intestinal bacteria remains unclear. This study examined the urinary and fecal excretion of a newly identified microbial PhIP metabolite 7-hydroxy-5-methyl-3-phenyl-6,7,8,9-tetrahydropyrido[3',2':4,5]imidazo[1,2-a]pyrimidin-5-ium chloride (PhIP-MI) in humans. The subjects were fed 150 g of cooked chicken containing 0.88-4.7 mu g PhIP, and urine and feces collections were obtained during 72 h after the meal. PhIP-M1 and its trideuterated derivate were synthesized and a LC/MS/MS method was developed for their quantification. The mutagenic activity of PhIP-M1, as analyzed using the Salmonella strains TA98, TA100 and TA102, yielded no significant response. Of the ingested PhIP dose, volunteers excreted 12-21% as PhIP and 1.2-15% as PhIP-M I in urine, and 26-42% as PhIP and 0.9-11% as PhIP-M1 in feces. The rate of PhIP-M1 excretion varied among the subjects. Yet, an increase in urinary excretion was observed for successive time increments, whereas for PhIP the majority was excreted in the first 24 h. These findings suggest that besides differences in digestion, metabolism and diet, the microbial composition of the gastrointestinal tract also strongly influences individual disposition and carcinogenic risk from PhIP. (c) 2007 Elsevier Ltd. All rights reserved.
C1 [Vanhaecke, L.; Verstraete, W.; Van de Wiele, T.] Univ Ghent, LabMET, B-9000 Ghent, Belgium.
[Knize, M. G.] Lawrence Livermore Natl Lab, Chem Mat & Life Sci Div, Livermore, CA 94551 USA.
[Noppe, H.; De Brabander, H.] Univ Ghent, Fac Vet Med, Lab Chem Anal, Dept Vet Publ Hlth & Food Safety, B-9820 Merelbeke, Belgium.
RP Van de Wiele, T (reprint author), Univ Ghent, LabMET, B-9000 Ghent, Belgium.
EM tom.vandewiele@ugent.be
RI Van de Wiele, Tom/C-8638-2011
FU NCI NIH HHS [CA55861]
NR 50
TC 16
Z9 16
U1 0
U2 9
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0278-6915
J9 FOOD CHEM TOXICOL
JI Food Chem. Toxicol.
PD JAN
PY 2008
VL 46
IS 1
BP 140
EP 148
DI 10.1016/j.fct.2007.07.008
PG 9
WC Food Science & Technology; Toxicology
SC Food Science & Technology; Toxicology
GA 260UW
UT WOS:000253036900017
PM 17766021
ER
PT S
AU Knize, MG
Felton, JS
AF Knize, Mark G.
Felton, James S.
BE Pico, Y
TI Heterocyclic Amines
SO FOOD CONTAMINANTS AND RESIDUE ANALYSIS
SE Wilson and Wilsons Comprehensive Analytical Chemistry
LA English
DT Article; Book Chapter
ID FRIED GROUND-BEEF; PERFORMANCE LIQUID-CHROMATOGRAPHY; IONIZATION
MASS-SPECTROMETRY; IN-PROCESS FLAVORS; DONE RED MEAT; AROMATIC-AMINES;
GAS-CHROMATOGRAPHY; COOKED MEAT; PAN RESIDUES; MODEL SYSTEM
C1 [Knize, Mark G.; Felton, James S.] Lawrence Livermore Natl Lab, Chem Mat & Life Sci Directorate, Livermore, CA 94550 USA.
RP Knize, MG (reprint author), Lawrence Livermore Natl Lab, Chem Mat & Life Sci Directorate, Livermore, CA 94550 USA.
NR 107
TC 0
Z9 0
U1 0
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0166-526X
BN 978-0-08-093192-0
J9 COMP ANAL C
PY 2008
VL 51
BP 685
EP 704
DI 10.1016/S0166-526X(08)00019-6
PG 20
WC Chemistry, Analytical; Food Science & Technology
SC Chemistry; Food Science & Technology
GA BCR30
UT WOS:000311082100021
ER
PT J
AU Matthews, RW
Robertson, K
Marland, G
Marland, E
AF Matthews, R. W.
Robertson, K.
Marland, G.
Marland, E.
BE FreerSmith, PH
Broadmeadow, MSJ
Lynch, JM
TI Carbon in Wood Products and Product Substitution
SO FORESTRY AND CLIMATE CHANGE
LA English
DT Article; Book Chapter
ID SEQUESTRATION
C1 [Matthews, R. W.] Forest Res, Alice Holt Lodge, Farnham GU10 4LH, Surrey, England.
[Robertson, K.] FORCE Consulting, Rotorua, New Zealand.
[Marland, G.] Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
[Marland, G.] Mid Sweden Univ, Ecotechnol Program, S-83125 Ostersund, Sweden.
[Marland, E.] Appalachian State Univ, Dept Math Sci, Boone, NC 28608 USA.
RP Matthews, RW (reprint author), Forest Res, Alice Holt Lodge, Farnham GU10 4LH, Surrey, England.
EM robert.matthews@forestry.gsi.gov.uk; kimberlyrobertson@xtra.co.nz;
marlandgh@ornl.gov; marlandes@appstate.edu
NR 23
TC 0
Z9 0
U1 0
U2 0
PU CABI PUBLISHING-C A B INT
PI WALLINGFORD
PA CABI PUBLISHING, WALLINGFORD 0X10 8DE, OXON, ENGLAND
BN 978-1-84593-294-7
PY 2008
BP 91
EP 104
PG 14
WC Environmental Sciences; Forestry; Meteorology & Atmospheric Sciences
SC Environmental Sciences & Ecology; Forestry; Meteorology & Atmospheric
Sciences
GA BVZ73
UT WOS:000293217000013
ER
PT J
AU Hanson, PJ
Kurz, WA
AF Hanson, P. J.
Kurz, W. A.
BE FreerSmith, PH
Broadmeadow, MSJ
Lynch, JM
TI Commercial and Project-based Responses and Associated Research
Initiatives in the Forest Sector
SO FORESTRY AND CLIMATE CHANGE
LA English
DT Article; Book Chapter
ID GREENHOUSE-GAS EMISSIONS; MANAGEMENT; BENEFITS; LIDAR
C1 [Hanson, P. J.] Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
[Kurz, W. A.] Nat Resources Canada, Canadian Forest Serv, Victoria, BC V8Z 15M, Canada.
RP Hanson, PJ (reprint author), Oak Ridge Natl Lab, Div Environm Sci, Bethel Valley Rd,Bldg 1062, Oak Ridge, TN 37831 USA.
EM hansonpj@ornl.gov; wkurz@nrcan.gc.ca
NR 14
TC 0
Z9 0
U1 0
U2 0
PU CABI PUBLISHING-C A B INT
PI WALLINGFORD
PA CABI PUBLISHING, WALLINGFORD 0X10 8DE, OXON, ENGLAND
BN 978-1-84593-294-7
PY 2008
BP 226
EP 232
PG 7
WC Environmental Sciences; Forestry; Meteorology & Atmospheric Sciences
SC Environmental Sciences & Ecology; Forestry; Meteorology & Atmospheric
Sciences
GA BVZ73
UT WOS:000293217000028
ER
PT S
AU Hutchinson, DP
Richards, RK
AF Hutchinson, D. P.
Richards, R. K.
BE Majumdar, AK
Ricklin, JC
TI All-weather long-wavelength infrared free space optical communications
SO FREE-SPACE LASER COMMUNICATIONS: PRINCIPLES AND ADVANCES
SE Optical and Fiber Communications Reports
LA English
DT Article; Book Chapter
AB Long-wavelength infrared radiation possesses superior transmission through common atmospheric problems such as fog, clouds, and smoke than the shorter wavelength laser sources in use today. Recent improvements in LWIR laser and modulator design makes possible reliable optical replacements for radio and microwave communications links in many applications. This paper describes components and techniques developed for high-speed, full-duplex all-weather infrared communications systems.
C1 [Hutchinson, D. P.; Richards, R. K.] Oak Ridge Natl Lab, Engn Sci & Technol Div, Oak Ridge, TN 37831 USA.
RP Hutchinson, DP (reprint author), Oak Ridge Natl Lab, Engn Sci & Technol Div, Bethel Valley Rd, Oak Ridge, TN 37831 USA.
EM hutchinsondp@ornl.gov; richardsrk@ornl.gov
NR 8
TC 0
Z9 0
U1 0
U2 0
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013, UNITED STATES
SN 1619-1447
BN 978-0-387-28652-5
J9 OPT FIBER COMMUN REP
PY 2008
BP 407
EP 417
DI 10.1007/s10297-006-0078-0
D2 10.1007/978-0-387-28677-8
PG 11
WC Engineering, Electrical & Electronic; Optics; Telecommunications
SC Engineering; Optics; Telecommunications
GA BKF23
UT WOS:000267946900010
ER
PT S
AU Greenlees, PT
Herzberg, RD
Ketelhut, S
Ackermann, D
Butler, PA
Chatillon, A
Eeckhaudt, S
Gall, BJP
Grahn, T
Gray-Jones, C
Gorgen, A
Hessberger, FP
Jakobsson, U
Jones, GD
Jones, P
Julin, R
Juutinein, S
Khoo, TL
Korten, W
Leino, M
Moon, S
Nyman, M
Pakarinen, J
Papadakis, P
Peura, P
Rahkila, P
Richer, M
Rostron, D
Santos, C
Saren, J
Scholey, C
Sorri, J
Tandel, SK
Theisen, C
Uusitalo, J
Venhart, M
AF Greenlees, P. T.
Herzberg, R. -D.
Ketelhut, S.
Ackermann, D.
Butler, P. A.
Chatillon, A.
Eeckhaudt, S.
Gall, B. J. P.
Grahn, T.
Gray-Jones, C.
Gorgen, A.
Hessberger, F. -P
Jakobsson, U.
Jones, G. D.
Jones, P.
Julin, R.
Juutinein, S.
Khoo, T. -L.
Korten, W.
Leino, M.
Moon, S.
Nyman, M.
Pakarinen, J.
Papadakis, P.
Peura, P.
Rahkila, P.
Richer, M.
Rostron, D.
Santos, C.
Saren, J.
Scholey, C.
Sorri, J.
Tandel, S. K.
Theisen, Ch.
Uusitalo, J.
Venhart, M.
BA Julin, R
BF Julin, R
BE Demetriuo, P
Harissopulos, SV
TI Spectroscopy of very heavy elements
SO FRONTIERS IN NUCLEAR STRUCTURE, ASTROPHYSICS, AND REACTIONS: FINUSTAR 2
SE AIP CONFERENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT Conference on Frontiers in Nuclear Structure, Astrophysics, and
Reactions
CY SEP 10-14, 2007
CL Crete, GREECE
SP NCSR, Univ Jyvaskyla, Natl Tech Univ Athens, Greek Minist Educ
DE superheavy elements; recoil-decay tagging; nuclear structure
ID FILLED RECOIL SEPARATOR; IN-BEAM; TRANSFERMIUM NUCLEI; NO-254; DECAY;
ISOMERS; SPECTROMETER; FISSION; STATES; BAND
AB Advances in spectrosopic techniques have meant that heavy nuclei in the upper right-hand corner of the nuclear chart have become amenable to detailed study. This detailed spectroscopic data can provide a stringent test for current nuclear structure theories. Experiments to investigate the structure of nuclei in the region of No-254 can yield information concerning moments of inertia, stability against fission with rotation, single-particle properties, excitation energies of two quasi-particle states, and so on. A brief overview of the techniques used and recent results from studies in the region of No-254 are presented, along with a summary of future developments which will allow further advances to be made.
C1 [Greenlees, P. T.; Ketelhut, S.; Eeckhaudt, S.; Grahn, T.; Jakobsson, U.; Jones, P.; Julin, R.; Juutinein, S.; Leino, M.; Nyman, M.; Pakarinen, J.; Peura, P.; Rahkila, P.; Saren, J.; Scholey, C.; Sorri, J.; Uusitalo, J.] Univ Jyvaskyla, Dept Phys, FIN-40014 Jyvaskyla, Finland.
[Herzberg, R. -D.; Butler, P. A.; Grahn, T.; Gray-Jones, C.; Jones, G. D.; Moon, S.; Pakarinen, J.; Papadakis, P.; Rostron, D.] Univ Liverpool, Dept Phys, Liverpool L69 7ZE, Merseyside, England.
[Ackermann, D.; Chatillon, A.; Hessberger, F. -P] GSI, D-64291 Darmstadt, Germany.
[Chatillon, A.; Gorgen, A.; Korten, W.; Theisen, Ch.] CEA Saclay, SPhN, DAPNIA, F-91191 Gif Sur Yvette, France.
[Gall, B. J. P.; Richer, M.] Inst Pluridisciplinaire Herbert Curien, F-67037 Strasbourg, France.
[Khoo, T. -L.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Tandel, S. K.] Univ Massachusetts Lowell, Dept Phys, Lowell, MA 01854 USA.
[Venhart, M.] Comenius Univ, Bratislava, Slovakia.
RP Greenlees, PT (reprint author), Univ Jyvaskyla, Dept Phys, FIN-40014 Jyvaskyla, Finland.
RI Pakarinen, Janne/F-6695-2010; Herzberg, Rolf-Dietmar/E-1558-2011;
KORTEN, Wolfram/H-3043-2013; Scholey, Catherine/G-2720-2014; THEISEN,
Christophe/A-9343-2015
OI Pakarinen, Janne/0000-0001-8944-8757; Scholey,
Catherine/0000-0002-8743-6071; THEISEN, Christophe/0000-0002-8509-1022
NR 41
TC 0
Z9 0
U1 0
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0532-5
J9 AIP CONF PROC
PY 2008
VL 1012
BP 56
EP 63
PG 8
WC Astronomy & Astrophysics; Physics, Nuclear
SC Astronomy & Astrophysics; Physics
GA BHT40
UT WOS:000256223700009
ER
PT S
AU Seweryniak, D
Carpenter, MP
Gros, S
Hecht, AA
Hoteling, N
Janssens, RVF
Khoo, TL
Lauritsen, T
Lister, CJ
Lotay, G
Peterson, D
Robinson, AP
Walters, WB
Wang, X
Woods, PJ
Zhu, S
AF Seweryniak, D.
Carpenter, M. P.
Gros, S.
Hecht, A. A.
Hoteling, N.
Janssens, R. V. F.
Khoo, T. L.
Lauritsen, T.
Lister, C. J.
Lotay, G.
Peterson, D.
Robinson, A. P.
Walters, W. B.
Wang, X.
Woods, P. J.
Zhu, S.
BA Julin, R
BF Julin, R
BE Demetriuo, P
Harissopulos, SV
TI Single-neutron states in Sn-101
SO FRONTIERS IN NUCLEAR STRUCTURE, ASTROPHYSICS, AND REACTIONS: FINUSTAR 2
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT Conference on Frontiers in Nuclear Structure, Astrophysics, and
Reactions
CY SEP 10-14, 2007
CL Crete, GREECE
SP NCSR, Univ Jyvaskyla, Natl Tech Univ Athens, Greek Minist Educ
DE gamma-ray spectroscopy; beta-delayed proton emission; shell model
ID NUCLEI; DECAY
AB A search for gamma-ray transitions in Sn-101, which contains only one neutron outside the Sn-100 core, was carried out at the Argonne Tandem-Linac Accelerator System. Sn-101 nuclei were produced using the Ti-46(Ni-58,3n)Sn-101 reaction. In-beam gamma rays were detected in the Gammasphere Ge-detector array and were correlated with Sn-101 beta-delayed protons using the Recoil-Decay Tagging method. A gamma-ray line at 172 keV was assigned to Sn-101 and was interpreted as the transition between the single-neutron g(7/2) and d(5/2) states. The measured nu g(7/2)-nu d(5/2) energy splitting is compared with predictions of various mean-field potentials. It is also used to calculate multi-neutron configurations in light Sn isotopes. Prospects of using P-delayed protons for tagging other exotic nuclei in the Sn-100 region are discussed.
C1 [Seweryniak, D.; Carpenter, M. P.; Gros, S.; Janssens, R. V. F.; Khoo, T. L.; Lauritsen, T.; Lister, C. J.; Peterson, D.; Robinson, A. P.; Wang, X.; Zhu, S.] Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
[Hecht, A. A.; Hoteling, N.; Walters, W. B.] Univ Maryland, Parks Coll, College Pk, MD 20742 USA.
[Seweryniak, D.; Carpenter, M. P.; Gros, S.; Janssens, R. V. F.; Khoo, T. L.; Lauritsen, T.; Lister, C. J.; Peterson, D.; Robinson, A. P.; Zhu, S.] Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
[Lotay, G.; Woods, P. J.] Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland.
[Wang, X.] Univ Notre Dame, Notre Dame, IN 46556 USA.
RP Seweryniak, D (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
RI Carpenter, Michael/E-4287-2015
OI Carpenter, Michael/0000-0002-3237-5734
FU U.S. Department of Energy [DE-AC02-06CH11357]
FX This work was supported by the U.S. Department of Energy, Office of
Nuclear Physics under contract No. DE-AC02-06CH11357.
NR 7
TC 0
Z9 0
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0532-5
J9 AIP CONF PROC
PY 2008
VL 1012
BP 79
EP +
PG 2
WC Astronomy & Astrophysics; Physics, Nuclear
SC Astronomy & Astrophysics; Physics
GA BHT40
UT WOS:000256223700013
ER
PT S
AU Bredeweg, TA
AF Bredeweg, T. A.
BA Julin, R
BF Julin, R
CA DANCE Collaboration
BE Demetriuo, P
Harissopulos, SV
TI Neutron capture reactions at DANCE
SO FRONTIERS IN NUCLEAR STRUCTURE, ASTROPHYSICS, AND REACTIONS: FINUSTAR 2
SE AIP CONFERENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT Conference on Frontiers in Nuclear Structure, Astrophysics, and
Reactions
CY SEP 10-14, 2007
CL Crete, GREECE
SP NCSR, Univ Jyvaskyla, Natl Tech Univ Athens, Greek Minist Educ
DE neutron capture; neutron-induced fission; gamma-ray calorimeter
ID LUJAN-CENTER; SIMULATION; DETECTOR
AB The Detector for Advanced Neutron Capture Experiments (DANCE) is a 4 pi BaF2 array consisting of 160 active detector elements. The primary purpose of the array is to perform neutron capture cross section measurements on small (greater than or similar to 100 mu g) and/or radioactive (less than or similar to 100 mCi) species. The measurements made possible with this array will be useful in answering outstanding questions in the areas of national security, threat reduction, nuclear astrophysics, advanced reactor design and accelerator transmutation of waste. Since the commissioning of DANCE we have performed neutron capture cross section measurements on a wide array of medium to heavy mass nuclides. Measurements to date include neutron capture cross sections on Am-241,Am-243, neutron capture and neutron-induced fission cross sections and capture-to-fission ratio (alpha = sigma(gamma)/sigma(f)) for U-235 using a new fission-tagging detector as well as neutron capture cross sections for several astrophysics branchpoint nuclei. Results from several of these measurements will be presented along with a discussion of additional physics information that can be extracted from the DANCE data.
C1 [Bredeweg, T. A.; DANCE Collaboration] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Bredeweg, TA (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
NR 15
TC 0
Z9 0
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0532-5
J9 AIP CONF PROC
PY 2008
VL 1012
BP 111
EP 117
PG 7
WC Astronomy & Astrophysics; Physics, Nuclear
SC Astronomy & Astrophysics; Physics
GA BHT40
UT WOS:000256223700018
ER
PT S
AU Lister, CJ
AF (Kim) Lister, C. J.
BA Julin, R
BF Julin, R
BE Demetriuo, P
Harissopulos, SV
TI Advancing along the N = Z line: A 30 year odyssey
SO FRONTIERS IN NUCLEAR STRUCTURE, ASTROPHYSICS, AND REACTIONS: FINUSTAR 2
SE AIP CONFERENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT Conference on Frontiers in Nuclear Structure, Astrophysics, and
Reactions
CY SEP 10-14, 2007
CL Crete, GREECE
SP NCSR, Univ Jyvaskyla, Natl Tech Univ Athens, Greek Minist Educ
DE N = Z nuclei; nuclear shapes; pairing correlations; and isomers
ID MEDIUM MASS NUCLEI; STRONTIUM ISOTOPES; SYMMETRY ENERGY; N=Z;
IDENTIFICATION; SPECTROSCOPY; DEFORMATION; STATES; SE-68
AB N = Z nuclei have always had a special role in nuclear physics due to the symmetry of their wavefunctions, and their anomalously high binding energy. Beyond Ni-56 they gain new significance, as they lie close to the proton dripline, and approaching Sn-100, they define the dripline. They are interesting for their structure, for rp-process nucleosynthesis, and as laboratories for weak interaction physics. In this paper I review some currently interesting topics and open questions.
C1 Argonne Natl Lab, Argonne, IL 60439 USA.
RP Lister, CJ (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
NR 57
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0532-5
J9 AIP CONF PROC
PY 2008
VL 1012
BP 128
EP 133
PG 6
WC Astronomy & Astrophysics; Physics, Nuclear
SC Astronomy & Astrophysics; Physics
GA BHT40
UT WOS:000256223700021
ER
PT S
AU Wuosmaa, AH
Rehm, KE
Greene, JP
Henderson, DJ
Janssens, RVF
Jiang, CL
Jisonna, L
Lighthall, JC
Marley, ST
Moore, EF
Pardo, RC
Patel, N
Paul, M
Peterson, D
Pieper, SC
Savard, G
Schiffer, JP
Segel, RE
Siemssen, RH
Tang, X
Wiringa, RB
AF Wuosmaa, A. H.
Rehm, K. E.
Greene, J. P.
Henderson, D. J.
Janssens, R. V. F.
Jiang, C. L.
Jisonna, L.
Lighthall, J. C.
Marley, S. T.
Moore, E. F.
Pardo, R. C.
Patel, N.
Paul, M.
Peterson, D.
Pieper, S. C.
Savard, G.
Schiffer, J. P.
Segel, R. E.
Siemssen, R. H.
Tang, X.
Wiringa, R. B.
BA Julin, R
BF Julin, R
BE Demetriuo, P
Harissopulos, SV
TI The structure of He-7
SO FRONTIERS IN NUCLEAR STRUCTURE, ASTROPHYSICS, AND REACTIONS: FINUSTAR 2
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT Conference on Frontiers in Nuclear Structure, Astrophysics, and
Reactions
CY SEP 10-14, 2007
CL Crete, GREECE
SP NCSR, Univ Jyvaskyla, Natl Tech Univ Athens, Greek Minist Educ
DE transfer reactions; unstable beams; spectroscopic factors
ID SHELL-MODEL CALCULATIONS; NUCLEI; HELIUM; SEARCH
AB We have studied the properties of the unbound isotope of helium He-7, using the H-2(Li-8,He-3)He-7 reaction. When combined with prior measurements of the H-2(He-6,p)He-7 reaction the data present a consistent picture for the low-lying excited states of He-7, specifically the negative parity sequence 3/2(-) (ground state) 1/2(-) (first-excited) and 5/2(-) (second-excited). The shapes but not the absolute magnitudes of the angular distributions are reproduced by ab-initio theory coupled with a DWBA reaction framework.
C1 [Wuosmaa, A. H.; Lighthall, J. C.; Marley, S. T.] Western Michigan Univ, Dept Phys, Kalamazoo, MI 49008 USA.
[Rehm, K. E.; Greene, J. P.; Henderson, D. J.; Janssens, R. V. F.; Jiang, C. L.; Moore, E. F.; Pardo, R. C.; Peterson, D.; Pieper, S. C.; Savard, G.; Schiffer, J. P.; Tang, X.; Wiringa, R. B.] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
[Jisonna, L.; Segel, R. E.] Northwestern Univ, Dept Phys, Evanston, IL 60208 USA.
[Patel, N.] Colorado Sch Mines, Dept Phys, Golden, CO 80401 USA.
[Paul, M.] Hebrew Univ Jerusalem, IL-91904 Jerusalem, Israel.
[Siemssen, R. H.] Kernfys Versneller Inst, NL-9747 AA Groningen, Netherlands.
RP Wuosmaa, AH (reprint author), Western Michigan Univ, Dept Phys, Kalamazoo, MI 49008 USA.
NR 22
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0532-5
J9 AIP CONF PROC
PY 2008
VL 1012
BP 225
EP +
PG 3
WC Astronomy & Astrophysics; Physics, Nuclear
SC Astronomy & Astrophysics; Physics
GA BHT40
UT WOS:000256223700039
ER
PT S
AU Brown, JR
Bentley, MA
Taylor, MJ
Aldrich, P
Bazin, D
Cook, JM
Digee, CA
Gade, A
Glasmacher, T
McDaniel, SM
Pritychenko, B
Ratkiewicz, A
Siwek, K
Weisshaar, D
AF Brown, J. R.
Bentley, M. A.
Taylor, M. J.
Aldrich, P.
Bazin, D.
Cook, J. M.
Digee, C. A.
Gade, A.
Glasmacher, T.
McDaniel, S. M.
Pritychenko, B.
Ratkiewicz, A.
Siwek, K.
Weisshaar, D.
BA Julin, R
BF Julin, R
BE Demetriuo, P
Harissopulos, SV
TI Mirrored fragmentation reactions - A new technique for probing isospin
symmetry in exotic nuclei
SO FRONTIERS IN NUCLEAR STRUCTURE, ASTROPHYSICS, AND REACTIONS: FINUSTAR 2
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT Conference on Frontiers in Nuclear Structure, Astrophysics, and
Reactions
CY SEP 10-14, 2007
CL Crete, GREECE
SP NCSR, Univ Jyvaskyla, Natl Tech Univ Athens, Greek Minist Educ
DE Ni-53; gamma-my spectroscopy; mirror energy differences; isobaric
analogue states; mirrored fragmentation reactions
AB Gamma decays have been observed for the first time in the T-z=-3/2 nucleus Ni-53. This represents the first gamma-spectroscopy of a T-z=-3/2 nucleus heavier than A=33. The nucleus was produced via a two-step fragmentation process, along with its mirror Mn-53. Differences in excitation energy between isobaric analogue states have been calculated and a preliminary interpretation attempted; shell model calculations are required to further understand these results. This work represents the first study of isobaric analogue states via mirrored fragmentation reactions and demonstrates the power of this new technique.
C1 [Brown, J. R.; Bentley, M. A.; Taylor, M. J.] Univ York, York YO10 5DD, N Yorkshire, England.
[Aldrich, P.; Bazin, D.; Cook, J. M.; Digee, C. A.; Gade, A.; Glasmacher, T.; McDaniel, S. M.; Ratkiewicz, A.; Siwek, K.; Weisshaar, D.] Michigan State Univ, Natl Supercond Cyclotron Lab, E Lansing, MI 48824 USA.
[Pritychenko, B.] Brookhaven Natl Lab, Natl Nucl Data Ctr, Upton, NY 11973 USA.
RP Brown, JR (reprint author), Univ York, York YO10 5DD, N Yorkshire, England.
RI Glasmacher, Thomas/H-9673-2014; Taylor, Michael/N-1725-2015
OI Glasmacher, Thomas/0000-0001-9436-2448; Taylor,
Michael/0000-0002-8718-3684
NR 6
TC 1
Z9 1
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0532-5
J9 AIP CONF PROC
PY 2008
VL 1012
BP 347
EP +
PG 2
WC Astronomy & Astrophysics; Physics, Nuclear
SC Astronomy & Astrophysics; Physics
GA BHT40
UT WOS:000256223700061
ER
PT S
AU Ziomek-Moroz, M
Adler, T
Alman, DE
Jablonski, PD
Clark, J
Penner, LR
AF Ziomek-Moroz, M.
Adler, T.
Alman, D. E.
Jablonski, P. D.
Clark, J.
Penner, L. R.
BE Williams, M
Krist, K
Garland, N
Satyapal, S
TI Materials Performance of Modified 430 Stainless Steel in Simulated SOFC
Stack Environments for Integrated Gasification Fuel Cell System
Applications
SO FUEL CELL SEMINAR 2007
SE ECS Transactions
LA English
DT Proceedings Paper
CT Fuel Cell Seminar 2007
CY 2007
CL San Antonio, TX
AB The corrosion behaviors of a low silicon and aluminum 430 stainless steel with and without ceria surface treatment were investigated in a simulated coal syngas at 800 degrees C and in air. Thermodynamic calculations were made to predict carbon activities for the coal syngas as a function of temperature. At 800 degrees C, carbon activity is similar to 1.1, which indicates that carbon that forms could diffuse into the steel and induce carbon corrosion, e.g. carburization and metal dusting.
The surface morphology was investigated with X-ray diffraction and scanning electron microscopy. In coal gas, the scale formed on bare steel consisted of Mn(1.5)Cr(1.5)O(4) and Cr(2)O(3) and on ceria treated steel (Fe, Mn)O, FeCr(2)O(4), Cr(2)O(3), and CeCrO(3). Both materials underwent carburization, but not metal dusting.
The results of oxidation in air using a thermogravimetric apparatus confirmed that the 430 sample was less resistant to oxidation than the 430 treated with ceria.
C1 [Ziomek-Moroz, M.; Adler, T.; Alman, D. E.; Jablonski, P. D.; Clark, J.; Penner, L. R.] US DOE, Off Res & Dev, Natl Energy Technol Lab, Albany, OR 97321 USA.
RP Ziomek-Moroz, M (reprint author), US DOE, Off Res & Dev, Natl Energy Technol Lab, Albany, OR 97321 USA.
NR 20
TC 2
Z9 2
U1 0
U2 1
PU ELECTROCHEMICAL SOCIETY INC
PI PENNINGTON
PA 65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA
SN 1938-5862
BN 978-1-56677-639-4
J9 ECS TRANSACTIONS
PY 2008
VL 12
IS 1
BP 273
EP 281
DI 10.1149/1.2921553
PG 9
WC Electrochemistry; Energy & Fuels
SC Electrochemistry; Energy & Fuels
GA BME48
UT WOS:000272017100027
ER
PT S
AU Flynn, M
Kenyon, GT
AF Flynn, Mark
Kenyon, Garrett T.
BE Ilyin, S
TI Neurally Inspired Algorithms as Computational Tools
SO FUNCTIONAL INFORMATICS IN DRUG DISCOVERY
SE Drug Discovery Series
LA English
DT Article; Book Chapter
ID CAT VISUAL-CORTEX; DEPENDENT NEURONAL OSCILLATIONS; LATERAL
GENICULATE-NUCLEUS; LONG-RANGE SYNCHRONIZATION; COINCIDENCE DETECTION;
TEMPORAL PATTERNS; CORTICAL-NEURONS; STRIATE CORTEX; IN-VIVO;
SYNCHRONOUS OSCILLATIONS
C1 [Flynn, Mark; Kenyon, Garrett T.] Los Alamos Natl Lab, Los Alamos, NM USA.
RP Flynn, M (reprint author), Los Alamos Natl Lab, Los Alamos, NM USA.
NR 101
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
SN 2154-5200
J9 DRUG DISCOV SER
JI Drug Discov. Ser.
PY 2008
VL 9
BP 13
EP 39
PG 27
WC Biotechnology & Applied Microbiology; Pharmacology & Pharmacy
SC Biotechnology & Applied Microbiology; Pharmacology & Pharmacy
GA BKV58
UT WOS:000269400900002
ER
PT B
AU Chen, JS
Sun, CJ
Chow, GM
AF Chen, J. S.
Sun, C. J.
Chow, G. M.
BE Seal, S
TI Nanostructured High-Anisotropy Materials for High-Density Magnetic
Recording
SO FUNCTIONAL NANOSTRUCTURES: PROCESSING, CHARACTERIZATION, AND
APPLICATIONS
SE Nanostructure Science and Technology
LA English
DT Article; Book Chapter
ID FEPT THIN-FILMS; COMPOSITE NANOGRANULAR FILMS; TOP LAYER DIFFUSION;
L1(0) FEPT; MAGNETOCRYSTALLINE ANISOTROPY; GRANULAR FILMS; PERPENDICULAR
MEDIA; ORDERED ALLOY; PARTICLE-SIZE; PINNING LAYER
C1 [Chen, J. S.] Data Storage Inst, Singapore 117608, Singapore.
[Chen, J. S.; Sun, C. J.; Chow, G. M.] Natl Univ Singapore, Dept Mat Sci & Engn, Singapore 119260, Singapore.
[Sun, C. J.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Chen, JS (reprint author), Data Storage Inst, Singapore 117608, Singapore.
EM Chen_Jingsheng@dsi.a-star.edu.sg
RI Chen, Jingsheng/D-9107-2011
NR 180
TC 1
Z9 1
U1 1
U2 2
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013, UNITED STATES
BN 978-0-387-35463-7
J9 NANOSTRUCT SCI TECHN
PY 2008
BP 345
EP 413
DI 10.1007/978-0-387-48805-9_7
D2 10.1007/978-0-387-48805-9
PG 69
WC Nanoscience & Nanotechnology
SC Science & Technology - Other Topics
GA BKE48
UT WOS:000267890100007
ER
PT J
AU McMurtrie, RE
Norby, RJ
Medlyn, BE
Dewar, RC
Pepper, DA
Reich, PB
Barton, CVM
AF McMurtrie, Ross E.
Norby, Richard J.
Medlyn, Belinda E.
Dewar, Roderick C.
Pepper, David A.
Reich, Peter B.
Barton, Craig V. M.
TI Why is plant-growth response to elevated CO2 amplified when water is
limiting, but reduced when nitrogen is limiting? A growth-optimisation
hypothesis
SO FUNCTIONAL PLANT BIOLOGY
LA English
DT Article
DE carbon-nitrogen-water economy; climate change; CO2 enrichment; forest
model; leaf area index; stomatal conductance
ID ATMOSPHERIC CARBON-DIOXIDE; MODELING CANOPY PRODUCTION; NET PRIMARY
PRODUCTIVITY; LONG-TERM RESPONSE; LEAF-AREA; DECIDUOUS FOREST; STOMATAL
CONTROL; USE EFFICIENCY; FACE EXPERIMENTS; ENRICHMENT FACE
AB Experimental evidence indicates that the stomatal conductance and nitrogen concentration ([N]) of foliage decline under CO2 enrichment, and that the percentage growth response to elevated CO2 is amplified under water limitation, but reduced under nitrogen limitation. We advance simple explanations for these responses based on an optimisation hypothesis applied to a simple model of the annual carbon-nitrogen-water economy of trees growing at a CO2-enrichment experiment at Oak Ridge, Tennessee, USA. The model is shown to have an optimum for leaf [N], stomatal conductance and leaf area index (LAI), where annual plant productivity is maximised. The optimisation is represented in terms of a trade-off between LAI and stomatal conductance, constrained by water supply, and between LAI and leaf [N], constrained by N supply. At elevated CO2 the optimum shifts to reduced stomatal conductance and leaf [N] and enhanced LAI. The model is applied to years with contrasting rainfall and N uptake. The predicted growth response to elevated CO2 is greatest in a dry, high-N year and is reduced in a wet, low-N year. The underlying physiological explanation for this contrast in the effects of water versus nitrogen limitation is that leaf photosynthesis is more sensitive to CO2 concentration ([CO2]) at lower stomatal conductance and is less sensitive to [CO2] at lower leaf [N].
C1 [McMurtrie, Ross E.; Pepper, David A.] Univ New S Wales, Sch Biol Earth & Environm Sci, Sydney, NSW 2052, Australia.
[Norby, Richard J.] Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
[Medlyn, Belinda E.] Macquarie Univ, Sch Biol Sci, Sydney, NSW 2019, Australia.
[Dewar, Roderick C.] INRA Ctr Bordeaux Aquitaine, Lab Funct Ecol & Environm Phys EPHYSE, F-33883 Villenave Dornon, France.
[Reich, Peter B.] Univ Minnesota, Dept Forest Resources, St Paul, MN 55108 USA.
[Barton, Craig V. M.] NSW Dept Primary Ind, Beecroft, NSW 2119, Australia.
RP McMurtrie, RE (reprint author), Univ New S Wales, Sch Biol Earth & Environm Sci, Sydney, NSW 2052, Australia.
EM r.mcmurtrie@unsw.edu.au
RI Barton, Craig/B-7026-2008; Norby, Richard/C-1773-2012;
OI Norby, Richard/0000-0002-0238-9828; Medlyn, Belinda/0000-0001-5728-9827;
Pepper, David/0000-0002-7562-6919
NR 85
TC 69
Z9 70
U1 3
U2 44
PU CSIRO PUBLISHING
PI COLLINGWOOD
PA 150 OXFORD ST, PO BOX 1139, COLLINGWOOD, VICTORIA 3066, AUSTRALIA
SN 1445-4408
EI 1445-4416
J9 FUNCT PLANT BIOL
JI Funct. Plant Biol.
PY 2008
VL 35
IS 6
BP 521
EP 534
DI 10.1071/FP08128
PG 14
WC Plant Sciences
SC Plant Sciences
GA 333EI
UT WOS:000258134900009
ER
PT S
AU Weber, JE
Yelton, WG
Kumar, A
AF Weber, J. E.
Yelton, W. G.
Kumar, A.
BE Vaseashta, A
Milhailescu, IN
TI ELECTRODEPOSITION OF BI1-xSBx NANOWIRES AS AN ADVANCED MATERIAL FOR
THERMOELECTRIC APPLICATIONS
SO FUNCTIONALIZED NANOSCALE MATERIALS, DEVICES AND SYSTEMS
SE NATO Science for Peace and Security Series B-Physics and Biophysics
LA English
DT Proceedings Paper
CT NATO Advanced Study Institute on Functionalized Nanoscale Materials,
Devices and Systems for Chem-Bio Sensors, Photonics and Energy
Generation and Storage
CY JUN 04-15, 2007
CL Sinaia, ROMANIA
SP NATO
DE Nanowire; electrodeposition; thermoelectric application
AB This paper focuses on the electrodeposition of high density nanowire arrays in porous anodic aluminum oxide (AAO) templates. A two step anodization technique was used to develop a template for Bi1-xSbx nanowire growth directly on Si substrates. Uniform pores with virtually no grain boundaries were achieved. Fundamental electrochemistry experiments on Bi3+, Sb3+, and both cations in dimethyl sulfoxide (DMSO) were carried out to characterize the ideal chronopotential pulse and to determine the thermodynamic, diffusion and mass transport issues when plating Bi1-xSbx into nano dimension pore structures. Such chronopotentiometry resulted in uniform nanowire growth within porous channels of the AAO template.
C1 [Weber, J. E.; Kumar, A.] Univ S Florida, Dept Mech Engn, Nanomat & Nanomfg Res Ctr, Tampa, FL 33620 USA.
[Weber, J. E.; Kumar, A.] Univ S Florida, Dept Mech Engn Nanomat Nanomfg Res Ctr, Tampa, FL USA.
[Yelton, W. G.] Sandia Natl Labs, Photon Microsyst Technol, Albuquerque, NM USA.
RP Kumar, A (reprint author), Univ S Florida, Dept Mech Engn, Nanomat & Nanomfg Res Ctr, Tampa, FL 33620 USA.
EM akumar@eng.usf.edu
NR 2
TC 0
Z9 0
U1 0
U2 1
PU SPRINGER
PI DORDRECHT
PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS
SN 1871-465X
BN 978-1-4020-8901-5
J9 NATO SCI PEACE SEC B
PY 2008
BP 425
EP +
DI 10.1007/978-1-4020-8903-9_43
PG 2
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
SC Science & Technology - Other Topics; Materials Science
GA BIK88
UT WOS:000260438200043
ER
PT J
AU Litnovsky, A
Rudakov, DL
De Temmerman, G
Wienhold, P
Philipps, V
Samm, U
McLean, AG
West, WP
Wong, CPC
Brooks, NH
Watkins, JG
Wampler, WR
Stangeby, PC
Boedo, JA
Moyer, RA
Allen, SL
Fenstermacher, ME
Groth, M
Lasnier, CJ
Boivin, RL
Leonard, AW
Romanyuk, A
Hirai, T
Pintsuk, G
Breuer, U
Scholl, A
AF Litnovsky, A.
Rudakov, D. L.
De Temmerman, G.
Wienhold, P.
Philipps, V.
Samm, U.
McLean, A. G.
West, W. P.
Wong, C. P. C.
Brooks, N. H.
Watkins, J. G.
Wampler, W. R.
Stangeby, P. C.
Boedo, J. A.
Moyer, R. A.
Allen, S. L.
Fenstermacher, M. E.
Groth, M.
Lasnier, C. J.
Boivin, R. L.
Leonard, A. W.
Romanyuk, A.
Hirai, T.
Pintsuk, G.
Breuer, U.
Scholl, A.
TI First tests of diagnostic mirrors in a tokamak divertor: An overview of
experiments in D111-D
SO FUSION ENGINEERING AND DESIGN
LA English
DT Article
DE diagnostic mirrors; ITER; erosion and deposition; reflectivity and
polarization
ID DIII-D TOKAMAK; HYDROCARBON FORMATION; CARBON; ION; SYSTEMS; DESIGN;
PLASMA; LAYER
AB Mirrors will be used in ITER in all optical diagnostic systems observing the plasma radiation in the ultraviolet, visible and infrared ranges. Diagnostic mirrors in ITER will suffer from electromagnetic radiation, energetic particles and neutron irradiation. Erosion due to impact of fast neutralls from plasma and deposition of plasma impurities may significantly degrade optical and polarization characteristics of mirrors influencing the overall performance of the respective diagnostics. Therefore, maintaining the best possible performance of mirrors is of the crucial importance for the ITER optical diagnostics. Mirrors in ITER divertor are expected to suffer from deposition of impurities. The dedicated experiment in a tokamak divertor was needed to address this issue. Investigations with molybdenum diagnostic mirrors were made in DIII-D divertor. Mirror samples were exposed at different temperatures in the private flux region to a series of ELMy H-mode discharges with partially detached divertor plasmas. An increase of temperature of mirrors during the exposure generally led to the mitigation of carbon deposition, primarily due to temperature-enhanced chemical erosion of carbon layers by D atoms. Finally, for the mirrors exposed at the temperature of similar to 160 degrees C neither carbon deposition nor degradation of optical properties was detected. (c) 2007 Elsevier B.V. All rights reserved.
C1 [Litnovsky, A.; Wienhold, P.; Philipps, V.; Samm, U.] Forschungszentrum, Assoc EURATOM FZJ, Inst Energiefors, D-52425 Julich, Germany.
[Rudakov, D. L.; Boedo, J. A.; Moyer, R. A.] Univ Calif San Diego, La Jolla, CA 92093 USA.
[De Temmerman, G.; Romanyuk, A.] Univ Basel, Inst Phys, CH-4056 Basel, Switzerland.
[McLean, A. G.; Stangeby, P. C.] Univ Toronto, Inst Aerosp Studies, Toronto, ON M3H 5T6, Canada.
[West, W. P.; Wong, C. P. C.; Brooks, N. H.; Boivin, R. L.; Leonard, A. W.] Gen Atom Co, San Diego, CA 92186 USA.
[Watkins, J. G.; Wampler, W. R.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Allen, S. L.; Fenstermacher, M. E.; Groth, M.; Lasnier, C. J.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Hirai, T.; Pintsuk, G.] Forschungszentrum, Inst Energiefors, D-52425 Julich, Germany.
[Breuer, U.; Scholl, A.] Forschungszentrum, Zentralabt Chem Analysen, D-52425 Julich, Germany.
RP Litnovsky, A (reprint author), Forschungszentrum, Inst Energiefors, D-52425 Julich, Germany.
EM a.litnovsky@fz-juelich.de
RI Romanyuk, Andriy/E-4627-2010; Groth, Mathias/G-2227-2013
NR 29
TC 31
Z9 33
U1 0
U2 8
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0920-3796
J9 FUSION ENG DES
JI Fusion Eng. Des.
PD JAN
PY 2008
VL 83
IS 1
BP 79
EP 89
DI 10.1016/j.fusengdes.2007.06.042
PG 11
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 264GK
UT WOS:000253275500011
ER
PT J
AU Uckan, NA
AF Uckan, Nermin A.
TI Special issue on electron cyclotron wave physics, technology, and
applications - Part 2
SO FUSION SCIENCE AND TECHNOLOGY
LA English
DT Editorial Material
C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Uckan, NA (reprint author), Oak Ridge Natl Lab, 1 Ridge Natl Lab,POB 2008,MS 6169, Oak Ridge, TN 37831 USA.
NR 0
TC 0
Z9 0
U1 0
U2 1
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 1536-1055
J9 FUSION SCI TECHNOL
JI Fusion Sci. Technol.
PD JAN
PY 2008
VL 53
IS 1
BP III
EP III
PG 1
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 255TL
UT WOS:000252680200001
ER
PT J
AU Harvey, RW
Smirnov, AP
Nelson-Melby, E
Taylor, G
Coda, S
Ram, AK
AF Harvey, R. W.
Smirnov, A. P.
Nelson-Melby, E.
Taylor, G.
Coda, S.
Ram, A. K.
TI Nonthermal electron Bernstein emission in NSTX-like discharges
SO FUSION SCIENCE AND TECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 14th Joint Workshop on Electron Cyclotron Emission and Electron
Cyclotron Resonance Heating
CY MAY 09-12, 2006
CL Santorini, GREECE
DE plasmas; radio-frequency heating; electron Bernstein wave emission
ID INHOMOGENEOUS-PLASMA; CURRENT DRIVE; WAVES; TOKAMAKS; ABSORPTION; MODE
AB In overdense plasma for which the plasma frequency exceeds the cyclotron frequency, X-mode, near-perpendicular cyclotron emission does not propagate to the outboard plasma edge. However, under these conditions it remains possible for electron Bernstein waves (EBWs) to transmit emitted radiation from central plasma to the plasma exterior via a mode conversion to electromagnetic waves near the plasma edge. GENRAY is an all-frequencies, three-dimensional ray-tracing code and also calculates EBW emission (EBWE) from thermal or nonthermal relativistic distributions. The numerical methods are based on the earlier HORACE circular plasma code (R.W. Harvey et al., Proc. 7th Joint Workshop and International Atomic Energy Agency Technical Committee Meeting on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating, Hefei, China, 1989), generalized to noncircular plasmas and to electromagnetic EBWs, including a parallel refractive index greater than 1. Emission and absorption are calculated on an array of points along EBW rays emanating from the antenna, and the radiation transport equation is backsolved along the EBW rays to the antenna. Hot plasma dispersion is used along with a relativistic calculation of the thermal or nonthermal emission and absorption. This paper describes the calculation and reports new results for nonthermal EBWE. Along with detailed numerical analysis, EBWE can be used to measure both thermal and nonthermal properties of the electron distribution function.
C1 [Harvey, R. W.; Smirnov, A. P.; Nelson-Melby, E.] CompX, Del Mar, CA USA.
[Taylor, G.] Princeton Plasma Phys Lab, Princeton, NJ USA.
[Coda, S.] Ecole Polytech Fed Lausanne, Lausanne, Switzerland.
[Ram, A. K.] MIT, Boston, MA USA.
RP Harvey, RW (reprint author), CompX, Del Mar, CA USA.
EM bobh@compxco.com
RI Smirnov, Alexander /A-4886-2014
NR 18
TC 1
Z9 1
U1 1
U2 4
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 1536-1055
J9 FUSION SCI TECHNOL
JI Fusion Sci. Technol.
PD JAN
PY 2008
VL 53
IS 1
BP 237
EP 245
PG 9
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 255TL
UT WOS:000252680200022
ER
PT J
AU Renner, JL
AF Renner, Joel L.
BE Letcher, TM
TI Geothermal Energy
SO FUTURE ENERGY: IMPROVED, SUSTAINABLE AND CLEAN OPTIONS FOR OUR PLANET
LA English
DT Article; Book Chapter
AB The word 'geothermal' comes from the combination of the Greek words ge, meaning earth, and therm, meaning heat. This heat is manifested on the surface in the form of volcanoes, geysers and hot springs. Geothermal resources are concentrations of the earth's heat, or geothermal energy, that can be extracted and used economically now or in the reasonable future. The earth contains an immense amount of heat but the heat generally is too diffuse or deep for economic use. Hence, the search for geothermal resources focuses on those areas of the earth's crust where geological processes have raised temperatures near enough to the surface that the heat contained can be utilized. Currently, only concentrations of heat associated with water in permeable rocks can be exploited economically. These systems are known as hydrothermal geothermal systems.
This chapter will discuss where the earth's thermal energy is sufficiently concentrated for economic use, the various types of geothermal systems, the production and utilization of the resource, and the environmental benefits and costs of geothermal production.
C1 [Renner, Joel L.] US DOE, Idaho Natl Lab, Idaho Falls, ID 83415 USA.
EM jlrenner@live.com
NR 17
TC 1
Z9 1
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
BN 978-0-08-056487-6
PY 2008
BP 211
EP 223
DI 10.1016/B978-0-08-054808-1.00012-0
PG 13
WC Energy & Fuels
SC Energy & Fuels
GA BCQ38
UT WOS:000310997100015
ER
PT J
AU Allison, E
AF Allison, Edith
BE Letcher, TM
TI Methane Hydrates
SO FUTURE ENERGY: IMPROVED, SUSTAINABLE AND CLEAN OPTIONS FOR OUR PLANET
LA English
DT Article; Book Chapter
ID GAS HYDRATE
AB Methane hydrate is an ice-like substance composed of cages of water molecules enclosing a molecule of methane gas. Methane hydrate forms at high pressure and low temperature, where sufficient gas is present, and generally in two types of geological settings: in the Arctic, where hydrate forms beneath permafrost, and beneath the ocean floor at water depths greater than about 500 meters. The hydrate deposits themselves may be several hundred meters thick. The world methane hydrate resource is huge, estimated to be equivalent to or larger than conventional natural gas resources. However, future production volumes are speculative because methane production from hydrate has not been documented beyond small-scale field experiments. The two major technical constraints to production are: (1) the need to detect and quantify methane hydrate deposits prior to drilling, and (2) the demonstration of methane production from hydrate at commercial volumes. Recent and planned research and field trials should answer these two issues. In a few tests, researchers have demonstrated the capability to predict the location and volume of methane hydrate deposits using reprocessed conventional 3D seismic data, and new techniques, including multi-component seismic, are being tested. Methane hydrate deposits that have been extensively studied in the US and Canadian Arctic, and offshore of Japan, India, the USA and Canada, document concentrated deposits that may be economic to develop. Modelling of small-volume production tests in the US and Canadian Arctic suggest that commercial production is possible using depressurization and thermal stimulation from conventional wellbores. Large-scale production tests are planned in the Canadian Arctic in the winter of 2008 and in the US Arctic in the following year. Demonstration of production from offshore deposits will lag behind Arctic studies by three to five years, because marine deposits are less well documented, and marine sampling and well tests are significantly more expensive. Research programs in the USA and Japan aim to have the technology necessary to produce methane from hydrate by 2016-2020. Although there will be significant conventional natural gas resources available at that time, production of methane from hydrate is expected to proceed in areas lacking adequate indigenous natural gas supplies and in areas with underutilized infrastructure. Methane hydrate could become a major energy source within 20 years of the first commercial production, paralleling the development of coal-bed methane.
C1 US DOE, Explorat & Methane Hydrate Program, Washington, DC 20585 USA.
RP Allison, E (reprint author), US DOE, Explorat & Methane Hydrate Program, 1000 Independence Ave, Washington, DC 20585 USA.
EM edith.allison@hq.doe.gov
NR 27
TC 1
Z9 1
U1 1
U2 4
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
BN 978-0-08-056487-6
PY 2008
BP 277
EP 290
DI 10.1016/B978-0-08-054808-1.00016-8
PG 14
WC Energy & Fuels
SC Energy & Fuels
GA BCQ38
UT WOS:000310997100019
ER
PT J
AU Grisham, LR
AF Grisham, Larry R.
BE Letcher, TM
TI Nuclear Fusion
SO FUTURE ENERGY: IMPROVED, SUSTAINABLE AND CLEAN OPTIONS FOR OUR PLANET
LA English
DT Article; Book Chapter
AB Nuclear fusion, the joining of light nuclei of hydrogen into heavier nuclei of helium, has potential environmental, safety and proliferation characteristics as an energy source, as well as adequate fuel to power civilization for times long compared to human history. It is, however, more challenging to convert to an energy source than nuclear fission. This chapter introduces the physics, advantages, difficulties, progress, economics and prospects for fusion energy power plants.
C1 Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Grisham, LR (reprint author), Princeton Univ, Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA.
EM lgrisham@pppl.gov
NR 10
TC 0
Z9 0
U1 1
U2 5
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
BN 978-0-08-056487-6
PY 2008
BP 291
EP 301
DI 10.1016/B978-0-08-054808-1.00017-X
PG 11
WC Energy & Fuels
SC Energy & Fuels
GA BCQ38
UT WOS:000310997100020
ER
PT J
AU Dongarra, J
Tourancheau, B
AF Dongarra, Jack
Tourancheau, Bernard
TI Special section: Cluster and computational grids for scientific
computing
SO FUTURE GENERATION COMPUTER SYSTEMS-THE INTERNATIONAL JOURNAL OF GRID
COMPUTING THEORY METHODS AND APPLICATIONS
LA English
DT Editorial Material
C1 INRIA, Ecole Normale Super, CNR, F-69634 Lyon 07, France.
Univ Lyon 1, F-69634 Lyon, France.
Univ Tennessee, Knoxville, TN 37996 USA.
Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Tourancheau, B (reprint author), INRIA, Ecole Normale Super, CNR, Pl Italie, F-69634 Lyon 07, France.
EM bernard.tourancheau@ens-lyon.fr
NR 0
TC 0
Z9 0
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0167-739X
J9 FUTURE GENER COMP SY
JI Futur. Gener. Comp. Syst.
PD JAN
PY 2008
VL 24
IS 1
BP 30
EP 30
DI 10.1016/j.future.2007.03.005
PG 1
WC Computer Science, Theory & Methods
SC Computer Science
GA 219NU
UT WOS:000250092700004
ER
PT J
AU Buntinas, D
Coti, C
Herault, T
Lemarinier, P
Pilard, L
Rezmerita, A
Rodriguez, E
Cappello, F
AF Buntinas, Darius
Coti, Camille
Herault, Thomas
Lemarinier, Pierre
Pilard, Laurence
Rezmerita, Ala
Rodriguez, Eric
Cappello, Franck
TI Blocking vs. non-blocking coordinated checkpointing for large-scale
fault tolerant MPI protocols
SO FUTURE GENERATION COMPUTER SYSTEMS-THE INTERNATIONAL JOURNAL OF GRID
COMPUTING THEORY METHODS AND APPLICATIONS
LA English
DT Article
DE fault tolerant MPI; performance evaluation; coordinated checkpointing;
rollback/recovery; large-scale
ID IMPLEMENTATION
AB A long-term trend in high-performance computing is the increasing number of nodes in parallel computing platforms, which entails a higher failure probability. Fault tolerant programming environments should be used to guarantee the safe execution of critical applications. Research in fault tolerant MPIs has led to the development of several fault tolerant MPI environments. Different approaches are being proposed using a variety of fault tolerant message passing protocols based on coordinated checkpointing or message logging. The most popular approach is with coordinated checkpointing. In the literature, two different concepts of coordinated checkpointing have been proposed: blocking and non-blocking. However they have never been compared quantitatively, and their respective scalabilities remain unknown. The contribution of this paper is to provide the first comparison between these two approaches and a study of their scalabilities. We have implemented the two approaches within the MPICH environments and evaluate their performance using the NAS parallel benchmarks. (C) 2007 Elsevier B.V. All rights reserved.
C1 Univ Paris 11, LRI, UMR8623, F-91405 Orsay, France.
INRIA Futurs, F-91893 Orsay, France.
CNRS, F-91405 Orsay, France.
Argonne Natl Lab, Div Math & Comp Sci, Argonne, IL 60439 USA.
RP Herault, T (reprint author), Univ Paris 11, LRI, UMR8623, F-91405 Orsay, France.
EM lemarini@lri.fr
NR 18
TC 30
Z9 30
U1 1
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0167-739X
J9 FUTURE GENER COMP SY
JI Futur. Gener. Comp. Syst.
PD JAN
PY 2008
VL 24
IS 1
BP 73
EP 84
DI 10.1016/j.future.2007.02.002
PG 12
WC Computer Science, Theory & Methods
SC Computer Science
GA 219NU
UT WOS:000250092700010
ER
PT S
AU Wei, SH
Dalpian, GM
AF Wei, Su-Huai
Dalpian, Gustavo M.
BE Morkoc, H
Litton, CW
Chyi, JI
Nanishi, Y
Yoon, E
TI Band coupling model of electron and hole mediated ferromagnetism in
Semiconductors: The case of GaN
SO GALLIUM NITRIDE MATERIALS AND DEVICES III
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Gallium Nitride Materials and Devices III
CY JAN 21-24, 2008
CL San Jose, CA
SP SPIE
DE diluted magnetic semiconductors; band coupling model; ferromagnetism;
hole; electron; GaN
ID MOLECULAR-BEAM-EPITAXY; DILUTED MAGNETIC SEMICONDUCTORS; III-V;
TEMPERATURE FERROMAGNETISM; SPINTRONICS; EXCHANGE; ALLOYS; GAMNN; (GA;
MN
AB Transition metal (TM) doped diluted magnetic semiconductors (DMSs) have many unique physical properties that can be used for magneto-optical and spintronic applications. The DMSs exhibit a wide range of magnetic ordering behavior. For example, Mn doped GaN can be either ferromagnetic or antiferromagnetic, depending on the Mn concentration, carrier density, or pressure. A unified band coupling model based on the p-d and d-d level repulsions between the TM and host elements are developed to explain the hole-induced ferromagnetism. We show that kinetic s-d coupling can be introduced through chemical ordering and strain, thus leading to electron-mediated ferromagnetism. Moreover, by using rare-earth elements (e.g., Gd) as magnetic dopants, the symmetry-allowed s-f coupling can also lead to a large splitting at the conduction band edge, producing electron-mediated ferromagnetism. Our model, therefore, provides a simple guideline for future band structure engineering of magnetic semiconductors.
C1 [Wei, Su-Huai; Dalpian, Gustavo M.] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Wei, SH (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA.
NR 42
TC 2
Z9 2
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 978-0-8194-7069-0
J9 PROC SPIE
PY 2008
VL 6894
AR 68940L
DI 10.1117/12.763494
PG 11
WC Engineering, Electrical & Electronic; Optics; Physics, Condensed Matter
SC Engineering; Optics; Physics
GA BHO16
UT WOS:000254733800010
ER
PT S
AU Casanova, S
Dingus, BL
Zhang, B
AF Casanova, S.
Dingus, B. L.
Zhang, B.
BE Galassi, M
Palmer, D
Fenimore, E
TI Contribution of GRB emission to the GeV extragalactic diffuse gamma-ray
flux
SO GAMMA-RAY BURSTS 2007
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT Santa Fe Conference on Gamma-Ray Bursts
CY NOV 05-09, 2007
CL Santa Fe, NM
SP Los Alamos Natl Lab, NASA Goddard Space Flight Ctr, Univ Space Res Assoc
DE VHE gamma rays; GRBs; extragalactic gamma ray background
ID VERY-HIGH-ENERGY; BURST AFTERGLOWS; LONG-DURATION; TEV; LUMINOSITY;
SPECTRUM; SEARCH; FIELDS; ARRAY
AB TeV gamma rays emitted by GRBs are converted into electron-positron pairs via interactions with the extragalactic infrared radiation fields. In turn the pairs produced, whose trajectories are randomized by magnetic fields, will inverse Compton scatter off the cosmic microwave background photons. The beamed TeV gamma ray flux from GRBs is thus transformed into a GeV isotropic gamma my flux, which contributes to the total extragalactic gamma-ray background emission. Assuming a model for the extragalactic radiation fields, for the GRB redshift distribution and for the GRB luminosity function, we evaluate the contribution of the GRB prompt and scattered emissions to the measured extragalactic gamma-ray flux. To estimate this contribution we optimistically require that the energy flux at TeV energies is about 10 times stronger than the energy flux at MeV energies. The resulting gamma-ray diffuse background is only a small fraction of what is observed, allowing blazars and other sources to give the dominant contribution.
C1 [Casanova, S.] Univ Roma La Sapienza, ICRA, Piazzale Aldo Moro 5, I-00185 Rome, Italy.
[Casanova, S.] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany.
[Dingus, B. L.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Zhang, B.] Univ Nevada, Dept Phys, Las Vegas, NV 89154 USA.
RP Casanova, S (reprint author), Univ Roma La Sapienza, ICRA, Piazzale Aldo Moro 5, I-00185 Rome, Italy.
RI Casanova, Sabrina/J-8935-2013;
OI Casanova, Sabrina/0000-0002-6144-9122; Dingus,
Brenda/0000-0001-8451-7450
NR 29
TC 2
Z9 2
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0533-2
J9 AIP CONF PROC
PY 2008
VL 1000
BP 40
EP +
PG 2
WC Astronomy & Astrophysics; Instruments & Instrumentation
SC Astronomy & Astrophysics; Instruments & Instrumentation
GA BHT72
UT WOS:000256301400009
ER
PT S
AU Massaro, F
Cutini, S
Conciatore, ML
Tramacere, A
AF Massaro, F.
Cutini, S.
Conciatore, M. L.
Tramacere, A.
BE Galassi, M
Palmer, D
Fenimore, E
TI Functional biases in GRB's spectral parameter correlations
SO GAMMA-RAY BURSTS 2007
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT Santa Fe Conference on Gamma-Ray Bursts
CY NOV 05-09, 2007
CL Santa Fe, NM
SP Los Alamos Natl Lab, NASA Goddard Space Flight Ctr, Univ Space Res Assoc
DE gamma-rays : bursts; gamma-rays : observations; X-rays : general;
methods : statistical
ID GAMMA-RAY BURSTS; INTRINSIC SPECTRA; PEAK ENERGY; ENERGETICS
AB Gamma Ray Bursts (GRBs) show evidence of different spectral shapes, light curves, duration, host galaxies and they explode within a wide redshift range. However, the most of them seems to follow very tight correlations among some observed quantities relating to their energetic. If true, these correlations have significant implications on burst physics, giving constraints on theoretical models. Moreover, several suggestions have been made to use these correlations in order to calibrate GRBs as standard candles and to constrain the cosmological parameters. We investigate the cosmological relation between low energy alpha index in GRBs prompt spectra and the redshift z. We present a statistical analysis of the relation between the total isotropic energy E-iso and the peak energy E-p (also known as Amati relation) in GRBs spectra searching for possible functional biases. Possible implications on the E-iso vs E-P relation of the alpha vs (1 + z) correlation are evaluated. We used MonteCarlo simulations to evaluate how large are the effects of functional biases on the E-iso vs E-p. We show that high values of the linear correlation coefficent, up to about 0.8, in the E-iso vs E-p relation are obtained for random generated samples of GRBs, confirming the relevance of functional biases. Astrophysical consequences from E-iso vs E-p relation are then to be revised after a more accurate and possibly bias free analysis.
C1 [Massaro, F.; Conciatore, M. L.] Harvard Smithsonian Astrophys Observ, 60 Garden St, Cambridge, MA 02138 USA.
[Cutini, S.; Conciatore, M. L.] ASI Sci Data Ctr ASDC, Rome, Italy.
[Tramacere, A.] Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA.
RP Massaro, F (reprint author), Harvard Smithsonian Astrophys Observ, 60 Garden St, Cambridge, MA 02138 USA.
EM francesco_mss@yahoo.it
RI Massaro, Francesco/L-9102-2016;
OI Massaro, Francesco/0000-0002-1704-9850; Cutini,
Sara/0000-0002-1271-2924; Tramacere, Andrea/0000-0002-8186-3793
NR 9
TC 4
Z9 4
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0533-2
J9 AIP CONF PROC
PY 2008
VL 1000
BP 84
EP +
PG 2
WC Astronomy & Astrophysics; Instruments & Instrumentation
SC Astronomy & Astrophysics; Instruments & Instrumentation
GA BHT72
UT WOS:000256301400020
ER
PT S
AU Ohno, M
Uehara, T
Takahashi, T
Fukazawa, Y
Kira, C
Hanabata, Y
Yamaoka, K
Nakagawa, YE
Sugita, S
Tamagawa, T
Terada, Y
Urata, Y
Onda, K
Kodaka, N
Endo, A
Suzuki, M
Morigami, K
Tashiro, MS
Enoto, T
Miyawamki, R
Nakazawa, K
Makishima, K
Sonoda, E
Yamauchi, M
Maeno, S
Tanaka, H
Hara, R
Kokubun, M
Suzuki, M
Takahashi, T
Hong, S
Murakami, T
Tajima, H
AF Ohno, M.
Uehara, T.
Takahashi, T.
Fukazawa, Y.
Kira, C.
Hanabata, Y.
Yamaoka, K.
Nakagawa, Y. E.
Sugita, S.
Tamagawa, T.
Terada, Y.
Urata, Y.
Onda, K.
Kodaka, N.
Endo, A.
Suzuki, M.
Morigami, K.
Tashiro, M. S.
Enoto, T.
Miyawamki, R.
Nakazawa, K.
Makishima, K.
Sonoda, E.
Yamauchi, M.
Maeno, S.
Tanaka, H.
Hara, R.
Kokubun, M.
Suzuki, M.
Takahashi, T.
Hong, S.
Murakami, T.
Tajima, H.
BE Galassi, M
Palmer, D
Fenimore, E
TI The spectral properties of the GRB prompt gamma-ray emission observed by
the Suzaku Wide-band All-sky Monitor
SO GAMMA-RAY BURSTS 2007
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT Santa Fe Conference on Gamma-Ray Bursts
CY NOV 05-09, 2007
CL Santa Fe, NM
SP Los Alamos Natl Lab, NASA Goddard Space Flight Ctr, Univ Space Res Assoc
DE gamma-ray burst : observation : Suzaku
ID BURSTS
AB We report on the observational results of GRBs by the Suzaku Wide-band All-sky Monitor (WAM) in these two years since the Suzaku launch. Using the WAM data, we can investigate the spectral properties of the prompt emission of GRBs with a wider energy band and the highest sensitivity than any previous GRB missions. We found that the spectral properties between short and long GRBs, such as the spectral parameter distribution, the hardness ratio, the spectral lag, and the total emitting energy are clearly different even in the MeV energy band. This result implies that different progenitors or different bulk Lorentz factors of the ejecta are likely causes for the difference between these two classes.
We also found that there is a strong correlation between the peak energy and the isotropic equivalent luminosity of the time-resolved spectra of the bright long GRB 061007, and found that this correlation can be separated well between rising and decay phase of each pulse. This indicates that the physical condition changes during the pulse phase of the burst.
C1 [Ohno, M.; Uehara, T.; Takahashi, T.; Fukazawa, Y.; Kira, C.; Hanabata, Y.] Hiroshima Univ, 1-3-1 Kagamiyama, Hiroshima 7398526, Japan.
[Yamaoka, K.; Nakagawa, Y. E.; Sugita, S.] Aoyama Gakuin Univ, Sagamihara, Kanagawa 2298558, Japan.
[Tamagawa, T.] RIKEN, Inst Phys & Chem Res, Hirosawa, Saitama, Japan.
[Terada, Y.; Urata, Y.; Onda, K.; Kodaka, N.; Endo, A.; Suzuki, M.; Morigami, K.; Tashiro, M. S.] Saitama Univ, Sakura, Saitama 3388570, Japan.
[Enoto, T.; Miyawamki, R.; Nakazawa, K.; Makishima, K.] Univ Tokyo, Tokyo 1130033, Japan.
[Sonoda, E.; Yamauchi, M.; Maeno, S.; Tanaka, H.; Hara, R.] Miyazaki Univ, Gakuen Kibanadai, Miyazaki 8892192, Japan.
[Kokubun, M.; Suzuki, M.; Takahashi, T.] ISAS, JAXA, Sagamihara, Kanagawa 2298510, Japan.
[Hong, S.] Nihon Univ, Funabashi, Chiba 2748501, Japan.
[Murakami, T.] Kanazawa Univ, Kanazawa, Ishikawa 9201192, Japan.
[Tajima, H.] Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA.
RP Ohno, M (reprint author), Hiroshima Univ, 1-3-1 Kagamiyama, Hiroshima 7398526, Japan.
NR 14
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0533-2
J9 AIP CONF PROC
PY 2008
VL 1000
BP 101
EP +
PG 2
WC Astronomy & Astrophysics; Instruments & Instrumentation
SC Astronomy & Astrophysics; Instruments & Instrumentation
GA BHT72
UT WOS:000256301400023
ER
PT S
AU Ukwatta, TN
Sakamoto, T
Stamatikos, M
Gehrels, N
Dhuga, KS
AF Ukwatta, T. N.
Sakamoto, T.
Stamatikos, M.
Gehrels, N.
Dhuga, K. S.
BE Galassi, M
Palmer, D
Fenimore, E
TI Screening high-z GRBs with BAT prompt emission properties
SO GAMMA-RAY BURSTS 2007
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT Santa Fe Conference on Gamma-Ray Bursts
CY NOV 05-09, 2007
CL Santa Fe, NM
SP Los Alamos Natl Lab, NASA Goddard Space Flight Ctr, Univ Space Res Assoc
DE gamma-ray bursts; high-z GRBs
AB Detecting high-z GRBs is important for constraining the GRB formation rate, and tracing the history of re-ionization and metallicity of the universe. Based on the current sample of GRBs detected by Swift with known redshifts, we investigated the relationship between red-shift, and spectral and temporal characteristics, using the BAT event-by-event data. We found red-shift trends for the peak-flux-normalized temporal width T90, the light curve variance, the peak flux, and the photon index in simple power-law fit to the BAT event data. We have constructed criteria for screening GRBs with high red-shifts. This will enable us to provide a much faster alert to the GRB community of possible high-z bursts.
C1 [Ukwatta, T. N.; Dhuga, K. S.] George Washington Univ, Washington, DC 20052 USA.
[Ukwatta, T. N.; Sakamoto, T.; Stamatikos, M.; Gehrels, N.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Sakamoto, T.] Univ Maryland, Baltimore County, Baltimore, MD 21250 USA.
[Stamatikos, M.] Oak Ridge Associated Univ, Oak Ridge, TN 37831 USA.
RP Ukwatta, TN (reprint author), George Washington Univ, Washington, DC 20052 USA.
EM tilan.ukwatta@gmail.com; Michael.Stamatikos-1@nasa.gov;
gehrels@milkyway.gsfc.nasa.gov
RI Gehrels, Neil/D-2971-2012
NR 3
TC 5
Z9 5
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0533-2
J9 AIP CONF PROC
PY 2008
VL 1000
BP 166
EP +
PG 2
WC Astronomy & Astrophysics; Instruments & Instrumentation
SC Astronomy & Astrophysics; Instruments & Instrumentation
GA BHT72
UT WOS:000256301400039
ER
PT S
AU Middleditch, J
AF Middleditch, John
BE Galassi, M
Palmer, D
Fenimore, E
TI The SN 1987A beam/jet and mystery spot: The rosetta stone for 99% of
GRBs
SO GAMMA-RAY BURSTS 2007
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT Santa Fe Conference on Gamma-Ray Bursts
CY NOV 05-09, 2007
CL Santa Fe, NM
SP Los Alamos Natl Lab, NASA Goddard Space Flight Ctr, Univ Space Res Assoc
DE gamma-rays : bursts; pulsars : general; white dwarfs; supernovae :
general; supernovae : individual (SN 1987A)
ID GAMMA-RAY BURSTS; SUPERNOVA 1987A; SN-1987A; PULSAR; LMC; PHOTOMETRY;
MERGER
AB Very early measurements of SN 1987A(87A) indicate an intense beam of light and jet of particles (BJ), which still ran ahead of a slower, cooler, shrouding flow, cooled itself or lost the ability to do so, before impacting polar ejecta (PE) remaining from the binary merger which formed Sk -69 degrees 202. The photon beam scattered off/reprocessed in, without significantly penetrating, the PE, producing 2 x 10(39) ergs s(-1) for about a day at day 8.0, the same delay predicted from the 0.059 arc s offset (17 light-days in projection) of the "Mystery Spot" (MS), and from the ring/bipolar geometry (the many other details of 87A also strongly suggest that it resulted from a merger of 2 stellar cores of a common envelope (CE) binary, i.e., a "double-degenerate" [DD] event). This scattered flux then decayed for a day with a timescale consistent with the UV flash, after which the luminosity exceeded the day 8.0 value by day 10.0, and continued rising linearly with time, indicating: (1) particles from die jet penetrating into the PE, with (2) the fastest traveling at >0.9 c, and (3) that both the beam and jet had collimation factors > 10(4). Even having to penetrate the CE of Sk -69 degrees 202, the BJ may have produced a full long/soft gamma-ray burst (lGRB) upon impacting the PE. Because DD can produce lGRBs, and must be the dominant SN mechanism in elliptical galaxies, where only short/hard GRBs (sGRBs) have been observed, DD without CE and PE also produces sGRBs, and thus the pre/non-CE/PE photon spectrum of 99% of GRBs is known, and neutron star (NS)-NS mergers may not make GRBs as we know them, and/or be as common as previously thought.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Middleditch, J (reprint author), Los Alamos Natl Lab, MS B265, Los Alamos, NM 87545 USA.
EM jon@lanl.gov
NR 19
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0533-2
J9 AIP CONF PROC
PY 2008
VL 1000
BP 350
EP 353
PG 4
WC Astronomy & Astrophysics; Instruments & Instrumentation
SC Astronomy & Astrophysics; Instruments & Instrumentation
GA BHT72
UT WOS:000256301400080
ER
PT S
AU Sugita, S
Yamaoka, K
Ohno, M
Tashiro, M
Pal'shin, V
Golenetskii, S
Sakamoto, T
Cummings, J
Krimm, H
Stamatikos, M
Parsons, A
Barthelmy, S
Gehrels, N
AF Sugita, Satoshi
Yamaoka, Kazutaka
Ohno, Masanori
Tashiro, Makoto
Pal'shin, Valentin
Golenetskii, Sergel
Sakamoto, Takanori
Cummings, Jay
Krimm, Hans
Stamatikos, Michael
Parsons, Ann
Barthelmy, Scott
Gehrels, Neil
BE Galassi, M
Palmer, D
Fenimore, E
TI Suzaku-WAM, Konus-Wind, and Swift-BAT observations of the prompt
emission of the highest redshift GRB 050904
SO GAMMA-RAY BURSTS 2007
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT Santa Fe Conference on Gamma-Ray Bursts
CY NOV 05-09, 2007
CL Santa Fe, NM
SP Los Alamos Natl Lab, NASA Goddard Space Flight Ctr, Univ Space Res Assoc
DE gamma-ray burst; observation; Suzaku
ID GAMMA-RAY BURST; PEAK ENERGY; AFTERGLOW; SPECTRUM
AB We present the results of the highest redshift GRB 050904 from joint spectral analyses among Swift/BAT, Konus-Wind and Suzaku-WAM covering a wide energy range of 15-5000 keV The peak energy was first measured at 338(-93)(+168) keV, corresponding to 2465(-678)(+1225) keV in the source frame. This is one of the highest value that has been ever meaured. The derived spectral and energetic parameters are consisitent with the Amati relation, but not with the Ghirlada relation. This implies that the circumburst density of this burst might be larger than the nominal value, as suggested by other wavelength observations. We also found that the burst could be an outlier in Yonetoku relation.
C1 [Sugita, Satoshi; Yamaoka, Kazutaka] Aoyama Gakuin Univ, 5-10-1 Fuchinobe, Kanagawa 2298558, Japan.
[Sugita, Satoshi] Inst Phys & Chem Res, Wako, Saitama 3510198, Japan.
[Ohno, Masanori] Hiroshima Univ, Sch Sci, Dept Phys Sci, Higashihiroshima 7398426, Japan.
[Tashiro, Makoto] Saitama Univ, Dept Phys, Saitama 3388570, Japan.
[Pal'shin, Valentin; Golenetskii, Sergel] AF Ioffe Phys Tech Inst, Expt Astrophys Lab, St Petersburg 194021, Russia.
[Sakamoto, Takanori; Cummings, Jay; Krimm, Hans; Stamatikos, Michael; Parsons, Ann; Barthelmy, Scott; Gehrels, Neil] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Sakamoto, Takanori; Stamatikos, Michael] Oak Ridge Associated Univ, Oak Ridge, TN 37831 USA.
[Cummings, Jay] Univ Maryland, Joint Ctr Astrophys, Baltimore, MD 21250 USA.
[Krimm, Hans] Univ Space Res Assoc, Columbia, MD 21044 USA.
RP Sugita, S (reprint author), Aoyama Gakuin Univ, 5-10-1 Fuchinobe, Kanagawa 2298558, Japan.
EM sugita@phys.aoyama.ac.jp; ohno@hep01.hepl.hiroshima-u.ac.jp;
tashiro@phy.saitamzi-u.ac.jp; val@mail.ioffe.ru; hans.krimm@nasa.gov;
michael.Stamatikos-1@nasa.gov; scott@milkyway.gsfc.nasa.gov;
gehrels@milkyway.gsfc.nasa.gov
RI Barthelmy, Scott/D-2943-2012; Gehrels, Neil/D-2971-2012; Parsons,
Ann/I-6604-2012; Pal'shin, Valentin/F-3973-2014; Golenetskii,
Sergey/B-3818-2015
NR 8
TC 2
Z9 2
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0533-2
J9 AIP CONF PROC
PY 2008
VL 1000
BP 354
EP +
PG 2
WC Astronomy & Astrophysics; Instruments & Instrumentation
SC Astronomy & Astrophysics; Instruments & Instrumentation
GA BHT72
UT WOS:000256301400081
ER
PT S
AU Panaitescu, A
AF Panaitescu, A.
BE Galassi, M
Palmer, D
Fenimore, E
TI Direct and bulk-scattered forward-shock emissions: sources of X-ray
afterglow diversity
SO GAMMA-RAY BURSTS 2007
SE AIP CONFERENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT Santa Fe Conference on Gamma-Ray Bursts
CY NOV 05-09, 2007
CL Santa Fe, NM
SP Los Alamos Natl Lab, NASA Goddard Space Flight Ctr, Univ Space Res Assoc
DE gamma-ray bursts; shock-waves; non-thermal emission
ID BURST AFTERGLOWS; LIGHT-CURVES; THEORETICAL IMPLICATIONS; SWIFT; BREAKS;
MODEL
AB I describe the modifications to the standard forward-shock model required to account for the X-ray light-curve features discovered by Swift in the early afterglow emission and propose that a delayed, pair-enriched, and highly relativistic outflow, which bulk-scatters the forward-shock synchrotron emission, yields sometimes a brighter X-ray emission, producing short-lived X-ray flares, X-ray light-curve plateaus ending with chromatic breaks, and fast post-plateau decays.
C1 Los Alamos Natl Lab, ISR 1, Los Alamos, NM 87545 USA.
RP Panaitescu, A (reprint author), Los Alamos Natl Lab, ISR 1, POB 1663, Los Alamos, NM 87545 USA.
NR 20
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0533-2
J9 AIP CONF PROC
PY 2008
VL 1000
BP 433
EP 438
PG 6
WC Astronomy & Astrophysics; Instruments & Instrumentation
SC Astronomy & Astrophysics; Instruments & Instrumentation
GA BHT72
UT WOS:000256301400098
ER
PT S
AU Williams, GG
Milne, PA
Park, HS
Barthelmy, SD
Hartmann, DH
Updike, A
Hurley, K
AF Williams, G. G.
Milne, P. A.
Park, H. S.
Barthelmy, S. D.
Hartmann, D. H.
Updike, A.
Hurley, K.
BE Galassi, M
Palmer, D
Fenimore, E
TI The robotic Super-LOTIS telescope: Results & future plans
SO GAMMA-RAY BURSTS 2007
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT Santa Fe Conference on Gamma-Ray Bursts
CY NOV 05-09, 2007
CL Santa Fe, NM
SP Los Alamos Natl Lab, NASA Goddard Space Flight Ctr, Univ Space Res Assoc
DE Super-LOTIS; gamma-ray bursts; afterglows
ID GAMMA-RAY BURSTS; OPTICAL TRANSIENT; AFTERGLOW; SEARCH; SYSTEM
AB We provide an overview of the robotic Super-LOTIS (Livermore Optical Transient Imaging System) telescope and present results from gamma-ray burst (GRB) afterglow observations using Super-LOTIS and other Steward Observatory telescopes. The 0.6-m Super-LOTIS telescope is a fully robotic system dedicated to the measurement of prompt and early time optical emission from GRBs. The system began routine operations from its Steward Observatory site atop Kitt Peak in April 2000 and currently operates every clear night. The telescope is instrumented with an optical CCD camera and a four position filter wheel. It is capable of observing Swift Burst Alert Telescope (BAT) error boxes as early or earlier than the Swift UV/Optical Telescope (UVOT). Super-LOTIS complements the UVOT observations by providing early R- and I-band imaging. We also use the suite of Steward Observatory telescopes including the 1.6-m Kuiper, the 2.3-m Bok, the 6.5-m MMT, and the 8.4-m Large Binocular Telescope to perform follow-up optical and near infrared observations of GRB afterglows. These follow-up observations have traditionally required human intervention but we are currently working to automate the 1.6-m Kuiper telescope to minimize its response time.
C1 [Williams, G. G.] Univ Arizona, Multiple Mirror Telescope Observ, POB 210065, Tucson, AZ 85721 USA.
[Milne, P. A.] Steward Observ, Tucson, AZ 85721 USA.
[Park, H. S.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Barthelmy, S. D.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Hartmann, D. H.; Updike, A.] Clemson Univ, Dept Phys & Astron, Clemson, SC 29634 USA.
[Hurley, K.] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
RP Williams, GG (reprint author), Univ Arizona, Multiple Mirror Telescope Observ, POB 210065, Tucson, AZ 85721 USA.
EM gwilliams@as.arizona.edu; scott@milkyway.gsfc.nasa.gov;
hdieter@clemson.edu; aupdike@clemson.edu; khurley@ssl.berkeley.edu
RI Barthelmy, Scott/D-2943-2012
FU NASA [06-SWIFT306-0067]
FX This work was supported in part by NASA Proposal Number
06-SWIFT306-0067.
NR 9
TC 10
Z9 10
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0533-2
J9 AIP CONF PROC
PY 2008
VL 1000
BP 535
EP +
PG 2
WC Astronomy & Astrophysics; Instruments & Instrumentation
SC Astronomy & Astrophysics; Instruments & Instrumentation
GA BHT72
UT WOS:000256301400118
ER
PT S
AU Hoover, AS
Kippen, RM
Wallace, MS
Pendleton, GN
Fishman, GJ
Meegan, CA
Kouveliotou, C
Wilson-Hodge, CA
Bissaldi, E
Diehl, R
Greiner, J
Lichti, GG
von Kienlin, A
Steinle, H
Bhat, PN
Briggs, MS
Connaughton, V
Paciesas, WS
Preece, RD
AF Hoover, A. S.
Kippen, R. M.
Wallace, M. S.
Pendleton, G. N.
Fishman, G. J.
Meegan, C. A.
Kouveliotou, C.
Wilson-Hodge, C. A.
Bissaldi, E.
Diehl, R.
Greiner, J.
Lichti, G. G.
von Kienlin, A.
Steinle, H.
Bhat, P. N.
Briggs, M. S.
Connaughton, V.
Paciesas, W. S.
Preece, R. D.
BE Galassi, M
Palmer, D
Fenimore, E
TI GLAST Burst Monitor instrument simulation and modeling
SO GAMMA-RAY BURSTS 2007
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT Santa Fe Conference on Gamma-Ray Bursts
CY NOV 05-09, 2007
CL Santa Fe, NM
SP Los Alamos Natl Lab, NASA Goddard Space Flight Ctr, Univ Space Res Assoc
DE GLAST burst monitor simulation modeling
AB The GLAST Burst Monitor (GBM) is designed to provide wide field of view observations of gamma-ray bursts and other fast transient sources in the energy range 10 keV to 30 MeV. The GBM is composed of several unshielded and uncollimated scintillation detectors (twelve NaI and two BGO) that are widely dispersed about the GLAST spacecraft. As a result reconstructing source locations, energy spectra, and temporal properties from GBM data requires detailed knowledge of the detectors' response to both direct radiation as well as that scattered from the spacecraft and Earth's atmosphere. This full GBM instrument response will be captured in the form of a response function database that is derived from computer modeling and simulation. The simulation system is based on the GEANT4 Monte Carlo radiation transport simulation toolset.
C1 [Hoover, A. S.; Kippen, R. M.; Wallace, M. S.] Los Alamos Natl Lab, POB 1663, Los Alamos, NM USA.
[Pendleton, G. N.] Dynet Inc, Huntsville, AL USA.
[Fishman, G. J.; Meegan, C. A.; Kouveliotou, C.] NASA, Natl Space Sci Technol Ctr, Huntsville, AL USA.
[Bissaldi, E.; Diehl, R.; Greiner, J.; Lichti, G. G.; von Kienlin, A.; Steinle, H.] Max Planck Inst Extraterrestrisce Phys, Garching, Germany.
[Bhat, P. N.; Briggs, M. S.; Connaughton, V.; Paciesas, W. S.; Preece, R. D.] Univ Alabama Huntsville, Natl Space Sci Technol, Huntsville, AL USA.
RP Hoover, AS (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM USA.
EM ahoover@lanl.gov; FISHMAN@MSFC.NASA.GOV; Chip.meegan@nasa.gov;
Chryssa.Kouveliotou@nasa.gov; jcg@mpe.mpg.de; azk@mpe.mpg.de;
Michael.Briggs@nasa.gov; valerie@nasa.gov; Rob.Preece@nasa.gov
RI Bissaldi, Elisabetta/K-7911-2016;
OI Bissaldi, Elisabetta/0000-0001-9935-8106; Preece,
Robert/0000-0003-1626-7335
NR 5
TC 8
Z9 8
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0533-2
J9 AIP CONF PROC
PY 2008
VL 1000
BP 565
EP +
PG 2
WC Astronomy & Astrophysics; Instruments & Instrumentation
SC Astronomy & Astrophysics; Instruments & Instrumentation
GA BHT72
UT WOS:000256301400125
ER
PT S
AU Meegan, C
Bhat, N
Bissaldi, E
Briggs, M
Connaughton, V
Diehl, R
Fishman, G
Greiner, J
von Kienlin, A
Kippen, RM
Kouveliotou, C
Lichti, G
Paciesas, W
Preece, R
Stelnle, H
Wilson-Hodge, C
AF Meegan, Charles
Bhat, Narayana
Bissaldi, Elisabetta
Briggs, Michael
Connaughton, Valerie
Diehl, Roland
Fishman, Gerald
Greiner, Jochen
von Kienlin, Andreas
Kippen, R. Marc
Kouveliotou, Chryssa
Lichti, Giselher
Paciesas, William
Preece, Robert
Stelnle, Helmut
Wilson-Hodge, Colleen
BE Galassi, M
Palmer, D
Fenimore, E
TI Expected performance of the GLAST burst monitor
SO GAMMA-RAY BURSTS 2007
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT Santa Fe Conference on Gamma-Ray Bursts
CY NOV 05-09, 2007
CL Santa Fe, NM
SP Los Alamos Natl Lab, NASA Goddard Space Flight Ctr, Univ Space Res Assoc
DE gamma-ray bursts; gamma-ray detectors
AB The GLAST Burst Monitor (GBM) will enhance LAT observations of GRBs by extending the spectral coverage from the LAT threshold down to similar to 8 keV, and will provide a trigger for re-orienting the spacecraft to observe delayed emission from selected bursts outside the LAT field of view. GBM consists of twelve NaI scintillation detectors operating in the 8 keV to 1 McV energy range and two BGO scintillation detectors operating in the 150 keV to 30 MeV energy range. Detector resolution, effective area, and angular response have been determined by calibrations. Analyses indicate that the on-board burst threshold will be similar to 0.7 photons cm(-2)s(-1) and the on-board burst localization accuracy will typically be better than 8 degrees.
C1 [Meegan, Charles; Fishman, Gerald; Kouveliotou, Chryssa; Wilson-Hodge, Colleen] NASA, George C Marshall Space Flight Ctr, Huntsville, AL 35812 USA.
[Bhat, Narayana; Briggs, Michael; Connaughton, Valerie; Paciesas, William; Preece, Robert] Univ Alabama, Huntsville, AL 35899 USA.
[Bissaldi, Elisabetta; Diehl, Roland; Greiner, Jochen; von Kienlin, Andreas; Lichti, Giselher; Stelnle, Helmut] Max Planck Inst Extraterr Phys, Garching, Germany.
[Kippen, R. Marc] Los Alamos Natl Lab, Los Alamos, NM USA.
RP Meegan, C (reprint author), NASA, George C Marshall Space Flight Ctr, Huntsville, AL 35812 USA.
RI Bissaldi, Elisabetta/K-7911-2016;
OI Bissaldi, Elisabetta/0000-0001-9935-8106; Preece,
Robert/0000-0003-1626-7335
FU Bundesministerium fur Bildung und Forschung (BMBF) via the Deutsches
Zentrum fur Luft- und Raumfahrt (DLR) [50 QV 0301]; U.S.Department of
Energy; National Nuclear Security Administration
FX The GBM science team gratefully acknowledges the outstanding engineering
support from our institutions and contractors,particularly
Jena-Optronik, Astrium,and South-west Research Institute.Support for the
German contribution was provided by the Bundesministerium fur Bildung
und Forschung (BMBF) via the Deutsches Zentrum fur Luft- und Raumfahrt
(DLR)under contract number 50 QV 0301.RMK acknowledges the support of
the U.S.Department of Energy, National Nuclear Security
Administration.The successful development of GBM is inlarge part due to
the skill and dedication of our Lead Systems Engineer during the
development phase,Mr.Fred Berry(1955-2006).
NR 0
TC 3
Z9 3
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0533-2
J9 AIP CONF PROC
PY 2008
VL 1000
BP 573
EP +
PG 2
WC Astronomy & Astrophysics; Instruments & Instrumentation
SC Astronomy & Astrophysics; Instruments & Instrumentation
GA BHT72
UT WOS:000256301400127
ER
PT S
AU Falcone, AD
Williams, DA
Baring, MG
Blandford, R
Connaughton, V
Coppi, P
Dermer, C
Dingus, B
Fryer, C
Gehrels, N
Granot, J
Horan, D
Katz, JI
Kuehn, K
Meszaros, P
Norris, J
Parkinson, PS
Pe'er, A
Ramirez-Ruiz, E
Razzaque, S
Wang, X
Zhang, B
AF Falcone, A. D.
Williams, D. A.
Baring, M. G.
Blandford, R.
Connaughton, V.
Coppi, P.
Dermer, C.
Dingus, B.
Fryer, C.
Gehrels, N.
Granot, J.
Horan, D.
Katz, J. I.
Kuehn, K.
Meszaros, P.
Norris, J.
Parkinson, P. Saz
Pe'er, A.
Ramirez-Ruiz, E.
Razzaque, S.
Wang, X.
Zhang, B.
BE Galassi, M
Palmer, D
Fenimore, E
TI The gamma ray burst section of the white paper on the status and future
of very high energy gamma ray astronomy: A brief preliminary report
SO GAMMA-RAY BURSTS 2007
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT Santa Fe Conference on Gamma-Ray Bursts
CY NOV 05-09, 2007
CL Santa Fe, NM
SP Los Alamos Natl Lab, NASA Goddard Space Flight Ctr, Univ Space Res Assoc
DE GRBs; VBE gamma-rays
ID GRB 970417A; 1ST SURVEY; FLARES; SWIFT; AFTERGLOWS; EMISSION; TEV
AB This is a short report on the preliminary findings of the gamma ray burst (GRB) working group for the white paper on the status and future of very high energy (VBE; >50 GeV) gamma-ray astronomy. The white paper discusses the status of past and current attempts to observe GRBs at GeV-TeV energies, including a handful of low-significance, possible detections. The white paper concentrates on the potential of future ground-based gamma-ray experiments to observe the highest energy emission ever recorded for GRBs, particularly for those that are nearby and have high Lorentz factors in the GRB jet. It is clear that the detection of VBE emission would have strong implications for GRB models, as well as cosmic ray origin. In particular, the extended emission phase (including both afterglow emission and possible flaring) of nearby long GRBs could provide the best possibility for detection. The difficult-to-obtain observations during the prompt phase of nearby long GRBs and short GRBs could also provide particularly strong constraints on the opacity and bulk Lorentz factors surrounding the acceleration site. The synergy with upcoming and existing observatories will, of course, be critical for both identification of GRBs and for multiwavelength/multi messenger studies.
C1 [Falcone, A. D.; Meszaros, P.; Wang, X.] Penn State Univ, 525 Davey Lab, University Pk, PA 16802 USA.
[Williams, D. A.; Parkinson, P. Saz] Univ Calif Santa Cruz, Santa Cruz Inst Particle Phys, Santa Cruz, CA 95064 USA.
[Baring, M. G.] Rice Univ, Dept Space Phys & Astron, Houston, TX 77251 USA.
[Blandford, R.; Granot, J.] Stanford Univ, Stanford Linear Accelerator Ctr, KIPAC, Stanford, CA 94309 USA.
[Connaughton, V.] Natl Space Sci & Technol Ctr, Huntsville, AL 35805 USA.
[Coppi, P.] Yale Univ, Dept Astron, New Haven, CT 06520 USA.
[Dermer, C.; Razzaque, S.] US Navy, Res Lab, Washington, DC 20375 USA.
[Dingus, B.; Fryer, C.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Gehrels, N.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Horan, D.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Katz, J. I.] Washington Univ, St Louis, MO 63130 USA.
[Kuehn, K.] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA.
[Norris, J.] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
[Pe'er, A.] Space Telescope Sci Inst, Baltimore, MD 21218 USA.
[Ramirez-Ruiz, E.] Univ Calif Santa Cruz, Dept Astron, Santa Cruz, CA 95064 USA.
[Zhang, B.] Univ Nevada, Dept Phys & Astron, Las Vegas, NV 89154 USA.
RP Falcone, AD (reprint author), Penn State Univ, 525 Davey Lab, University Pk, PA 16802 USA.
RI Gehrels, Neil/D-2971-2012;
OI Dingus, Brenda/0000-0001-8451-7450
NR 18
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0533-2
J9 AIP CONF PROC
PY 2008
VL 1000
BP 611
EP +
PG 2
WC Astronomy & Astrophysics; Instruments & Instrumentation
SC Astronomy & Astrophysics; Instruments & Instrumentation
GA BHT72
UT WOS:000256301400136
ER
PT B
AU Li, YA
Dongarra, J
Seymour, K
YarKhan, A
AF Li, Yinan
Dongarra, Jack
Seymour, Keith
YarKhan, Asim
GP IEEE Comp Soc
TI Request Sequencing: Enabling Workflow for Efficient Problem Solving in
GridSolve
SO GCC 2008: SEVENTH INTERNATIONAL CONFERENCE ON GRID AND COOPERATIVE
COMPUTING, PROCEEDINGS
LA English
DT Proceedings Paper
CT 7th International Conference on Grid and Cooperative Computing
CY OCT 24-26, 2008
CL Shenzhen, PEOPLES R CHINA
SP Chinese Acad Sci, Shenzhen Inst Adv Technol, Dawning Informat Ind Co Ltd, Chinese Natl Grid, European & Chinese Cooperat Grid, Chinese Acad Sci, Chinese Acad Engn
AB GridSolve employs a standard RPC-based model for solving computational problems. There are two deficiencies associated with this model when a computational problem essentially forms a workflow consisting of a set of tasks, among which there exist data dependencies. First, intermediate results are passed among tasks going through the client, resulting in additional data transport between the client and the servers, which is pure overhead. Second, since the execution of each individual task is a separate RPC session, it is difficult to exploit the potential parallelism among tasks. This paper presents a request sequencing technique that eliminates those limitations and solves the above problems. The core features of this work include automatic DAG construction and data dependency analysis, direct inter-server data transfer, and the capability of parallel task execution.
C1 [Li, Yinan; Dongarra, Jack; Seymour, Keith; YarKhan, Asim] Univ Tennessee, Dept Elect Engn & Comp Sci, Knoxville, TN 37996 USA.
[Dongarra, Jack] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Dongarra, Jack] Univ Manchester, Manchester M139PL, Lancs, England.
RP Li, YA (reprint author), Univ Tennessee, Dept Elect Engn & Comp Sci, Knoxville, TN 37996 USA.
EM yili@eecs.utk.edu; dongarra@eecs.utk.edu; seymour@eecs.utk.edu;
yarkhan@eecs.utk.edu
FU National Aeronautics and Space Administration's Earth Science Technology
Office [NCC5-626]
FX This research made use of Montage, funded by the National Aeronautics
and Space Administration's Earth Science Technology Office, Computation
Technologies Project, under Cooperative Agreement Number NCC5-626
between NASA and the California Institute of Technology. Montage is
maintained by the NASA/IPAC Infrared Science Archive.
NR 12
TC 1
Z9 1
U1 0
U2 2
PU IEEE COMPUTER SOC
PI LOS ALAMITOS
PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 USA
BN 978-0-7695-3449-7
PY 2008
BP 449
EP +
DI 10.1109/GCC.2008.97
PG 3
WC Computer Science, Theory & Methods
SC Computer Science
GA BIT11
UT WOS:000262480400066
ER
PT J
AU Abi-Haidar, A
Kaur, J
Maguitman, A
Radivojac, P
Rechtsteiner, A
Verspoor, K
Wang, ZP
Rocha, LM
AF Abi-Haidar, Alaa
Kaur, Jasleen
Maguitman, Ana
Radivojac, Predrag
Rechtsteiner, Andreas
Verspoor, Karin
Wang, Zhiping
Rocha, Luis M.
TI Uncovering protein interaction in abstracts and text using a novel
linear model and word proximity networks
SO GENOME BIOLOGY
LA English
DT Article
ID ANNOTATION
AB Background: We participated in three of the protein-protein interaction subtasks of the Second BioCreative Challenge: classification of abstracts relevant for protein-protein interaction (interaction article subtask [IAS]), discovery of protein pairs (interaction pair subtask [IPS]), and identification of text passages characterizing protein interaction (interaction sentences subtask [ISS]) in full-text documents. We approached the abstract classification task with a novel, lightweight linear model inspired by spam detection techniques, as well as an uncertainty-based integration scheme. We also used a support vector machine and singular value decomposition on the same features for comparison purposes. Our approach to the full-text subtasks (protein pair and passage identification) includes a feature expansion method based on word proximity networks.
Results: Our approach to the abstract classification task (IAS) was among the top submissions for this task in terms of measures of performance used in the challenge evaluation (accuracy, F-score, and area under the receiver operating characteristic curve). We also report on a web tool that we produced using our approach: the Protein Interaction Abstract Relevance Evaluator (PIARE). Our approach to the full-text tasks resulted in one of the highest recall rates as well as mean reciprocal rank of correct passages.
Conclusion: Our approach to abstract classification shows that a simple linear model, using relatively few features, can generalize and uncover the conceptual nature of protein-protein interactions from the bibliome. Because the novel approach is based on a rather lightweight linear model, it can easily be ported and applied to similar problems. In full-text problems, the expansion of word features with word proximity networks is shown to be useful, although the need for some improvements is discussed.
C1 [Abi-Haidar, Alaa; Kaur, Jasleen; Radivojac, Predrag; Rocha, Luis M.] Indiana Univ, Sch Informat, Bloomington, IN 47405 USA.
[Abi-Haidar, Alaa; Rocha, Luis M.] Fundacao Luso Americana Desenvolvimento Computat, Inst Gulbenkian Ciencia, P-2780156 Oeiras, Portugal.
[Maguitman, Ana] Univ Nacl Sur, Dept Ciencias & Ingn Computac, Buenos Aires, DF, Argentina.
[Rechtsteiner, Andreas] Indiana Univ, Ctr Genom & Bioinformat, Bloomington, IN 47405 USA.
[Verspoor, Karin] Los Alamos Natl Lab, Modeling Algorithms & Informat Grp, Los Alamos, NM 87545 USA.
[Wang, Zhiping] Indiana Univ, Sch Med, Bloomington, IN 47405 USA.
RP Rocha, LM (reprint author), Indiana Univ, Sch Informat, 107 S Indiana Ave, Bloomington, IN 47405 USA.
EM rocha@indiana.edu
RI Verspoor, Karin/G-6034-2016;
OI Verspoor, Karin/0000-0002-8661-1544; Kaur, Jasleen/0000-0002-1243-1452;
Rocha, Luis/0000-0001-9402-887X
FU NSF [CDA-9601632]
FX We would like to thank Santiago Schnell for graciously providing us with
additional proteomics-related articles not containing PPI information.
We would also like to thank the FLAD Computational Biology
Collaboratorium at the Gulbenkian Institute in Oeiras, Portugal, for
hosting and providing facilities used to conduct part of this research.
It was at the collaboratorium that we interacted with Florentino
Riverola, whose SpamHunting system inspired our approach to the IAS
task, and who was most helpful in discussing his system with us. We are
also grateful to Indiana University's Research and Technical Services
for technical support. The AVIDD Linux Clusters used in our analysis are
funded in part by NSF Grant CDA-9601632.
NR 24
TC 13
Z9 13
U1 0
U2 6
PU BIOMED CENTRAL LTD
PI LONDON
PA 236 GRAYS INN RD, FLOOR 6, LONDON WC1X 8HL, ENGLAND
SN 1474-760X
J9 GENOME BIOL
JI Genome Biol.
PY 2008
VL 9
SU 2
AR S11
DI 10.1186/gb-2008-9-S2-S11
PG 19
WC Biotechnology & Applied Microbiology; Genetics & Heredity
SC Biotechnology & Applied Microbiology; Genetics & Heredity
GA 602YB
UT WOS:000278173900011
PM 18834489
ER
PT J
AU Allen, JE
Gardner, SN
Slezak, TR
AF Allen, Jonathan E.
Gardner, Shea N.
Slezak, Tom R.
TI DNA signatures for detecting genetic engineering in bacteria
SO GENOME BIOLOGY
LA English
DT Article
ID SHUTTLE CLONING VECTOR; SEQUENCE-ANALYSIS; CRYPTIC-PLASMID;
CONSTRUCTION; ALIGNMENT; GENOME; OLIGONUCLEOTIDES; EXPRESSION; SYSTEMS
AB Using newly designed computational tools we show that, despite substantial shared sequences between natural plasmids and artificial vector sequences, a robust set of DNA oligomers can be identified that can differentiate artificial vector sequences from all available background viral and bacterial genomes and natural plasmids. We predict that these tools can achieve very high sensitivity and specificity rates for detecting new unsequenced vectors in microarray-based bioassays. Such DNA signatures could be important in detecting genetically engineered bacteria in environmental samples.
C1 [Allen, Jonathan E.; Gardner, Shea N.; Slezak, Tom R.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Allen, JE (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
EM allen99@llnl.gov
NR 35
TC 4
Z9 5
U1 1
U2 3
PU BIOMED CENTRAL LTD
PI LONDON
PA 236 GRAYS INN RD, FLOOR 6, LONDON WC1X 8HL, ENGLAND
SN 1474-760X
J9 GENOME BIOL
JI Genome Biol.
PY 2008
VL 9
IS 3
AR R56
DI 10.1186/gb-2008-9-3-r56
PG 10
WC Biotechnology & Applied Microbiology; Genetics & Heredity
SC Biotechnology & Applied Microbiology; Genetics & Heredity
GA 283TN
UT WOS:000254659500019
PM 18348716
ER
PT J
AU Haas, BJ
Salzberg, SL
Zhu, W
Pertea, M
Allen, JE
Orvis, J
White, O
Buell, CR
Wortman, JR
AF Haas, Brian J.
Salzberg, Steven L.
Zhu, Wei
Pertea, Mihaela
Allen, Jonathan E.
Orvis, Joshua
White, Owen
Buell, C. Robin
Wortman, Jennifer R.
TI Automated eukaryotic gene structure annotation using EVidenceModeler and
the program to assemble spliced alignments
SO GENOME BIOLOGY
LA English
DT Article
ID HIDDEN MARKOV MODEL; FULL-LENGTH CDNAS; GENOMIC DNA; ARABIDOPSIS GENOME;
MULTIPLE SOURCES; MESSENGER-RNA; PREDICTION; SEQUENCES; SET;
IDENTIFICATION
AB EVidenceModeler (EVM) is presented as an automated eukaryotic gene structure annotation tool that reports eukaryotic gene structures as a weighted consensus of all available evidence. EVM, when combined with the Program to Assemble Spliced Alignments (PASA), yields a comprehensive, configurable annotation system that predicts protein-coding genes and alternatively spliced isoforms. Our experiments on both rice and human genome sequences demonstrate that EVM produces automated gene structure annotation approaching the quality of manual curation.
C1 [Haas, Brian J.; Zhu, Wei; Orvis, Joshua; White, Owen; Buell, C. Robin; Wortman, Jennifer R.] J Craig Venter Inst, Inst Genom Res, Rockville, MD 20850 USA.
[Haas, Brian J.] MIT, Braod Inst, Cambridge, MA 02142 USA.
[Salzberg, Steven L.; Pertea, Mihaela; Allen, Jonathan E.] Univ Maryland, Dept Comp Sci, Ctr Bioinformat & Computat Biol, College Pk, MD 20742 USA.
[Allen, Jonathan E.] Lawrence Livermore Natl Lab, Computat Directorate, Livermore, CA 94550 USA.
[Orvis, Joshua; Wortman, Jennifer R.] Univ Maryland, Sch Med, Inst Genom Sci, Baltimore, MD 21201 USA.
[Buell, C. Robin] Michigan State Univ, Dept Plant Biol, E Lansing, MI 48824 USA.
RP Haas, BJ (reprint author), J Craig Venter Inst, Inst Genom Res, 9712 Med Ctr Dr, Rockville, MD 20850 USA.
EM bhaas@broad.mit.edu
RI Salzberg, Steven/F-6162-2011;
OI Salzberg, Steven/0000-0002-8859-7432; Wortman,
Jennifer/0000-0002-8713-1227
FU NIAID NIH HHS [N01AI30071]; NIGMS NIH HHS [R01 GM083873, R01
GM083873-05]; NLM NIH HHS [R01 LM006845, R01 LM006845-08, R01-LM006845]
NR 49
TC 183
Z9 188
U1 1
U2 15
PU BIOMED CENTRAL LTD
PI LONDON
PA 236 GRAYS INN RD, FLOOR 6, LONDON WC1X 8HL, ENGLAND
SN 1474-760X
J9 GENOME BIOL
JI Genome Biol.
PY 2008
VL 9
IS 1
AR R7
DI 10.1186/gb-2008-9-1-r7
PG 22
WC Biotechnology & Applied Microbiology; Genetics & Heredity
SC Biotechnology & Applied Microbiology; Genetics & Heredity
GA 271HP
UT WOS:000253779800015
PM 18190707
ER
PT J
AU Mons, B
Ashburner, M
Chichester, C
van Mulligen, E
Weeber, M
den Dunnen, J
van Ommen, GJ
Musen, M
Cockerill, M
Hermjakob, H
Mons, A
Packer, A
Pacheco, R
Lewis, S
Berkeley, A
Melton, W
Barris, N
Wales, J
Meijssen, G
Moeller, E
Roes, PJ
Borner, K
Bairoch, A
AF Mons, Barend
Ashburner, Michael
Chichester, Christine
van Mulligen, Erik
Weeber, Marc
den Dunnen, Johan
van Ommen, Gert-Jan
Musen, Mark
Cockerill, Matthew
Hermjakob, Henning
Mons, Albert
Packer, Abel
Pacheco, Roberto
Lewis, Suzanna
Berkeley, Alfred
Melton, William
Barris, Nickolas
Wales, Jimmy
Meijssen, Gerard
Moeller, Erik
Roes, Peter Jan
Borner, Katy
Bairoch, Amos
TI Calling on a million minds for community annotation in WikiProteins
SO GENOME BIOLOGY
LA English
DT Article
ID DATABASE; INFORMATION; GENE; DISAMBIGUATION; ASSOCIATIONS; DISCOVERY;
RESOURCE; ONTOLOGY
AB WikiProteins enables community annotation in a Wiki-based system. Extracts of major data sources have been fused into an editable environment that links out to the original sources. Data from community edits create automatic copies of the original data. Semantic technology captures concepts co-occurring in one sentence and thus potential factual statements. In addition, indirect associations between concepts have been calculated. We call on a 'million minds' to annotate a 'million concepts' and to collect facts from the literature with the reward of collaborative knowledge discovery. The system is available for beta testing at http://www.wikiprofessional.org.
A preview of the version highlighted by WikiProfessional is available at: http://conceptweblinker.wikiprofessional.org/default.py?url=nph-proxy.cgi/010000A/http/genomebiology.com/2008/9/5/R89.
C1 [Mons, Barend; van Mulligen, Erik] Erasmus MC, Dept Med Informat, NL-3015 GE Rotterdam, Netherlands.
[Mons, Barend; Chichester, Christine; den Dunnen, Johan; van Ommen, Gert-Jan] Leiden Univ, Med Ctr, Ctr Med Syst Biol, Dept Human Genet, NL-2333 ZC Leiden, Netherlands.
[Mons, Barend; Chichester, Christine; van Mulligen, Erik; Weeber, Marc; Mons, Albert; Berkeley, Alfred; Melton, William; Barris, Nickolas; Roes, Peter Jan] Knewco Inc, Rockville, MD 20850 USA.
[Mons, Barend; Meijssen, Gerard; Moeller, Erik] Open Progress Educ, NL-1315 BH AlmereAlmere, Netherlands.
[Ashburner, Michael; Lewis, Suzanna] EMBL European Bioinformat Inst, GO Consortium, Cambridge CB10 1SD, England.
[Ashburner, Michael; Lewis, Suzanna] Univ Cambridge, Dept Genet, Hinxton CB10 1SD, England.
[Borner, Katy] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley Bioinformat Open Source Projects, Berkeley, CA 94720 USA.
[Chichester, Christine; Bairoch, Amos] Univ Geneva, Swiss Prot Grp, Swiss Inst Bioinformat, CH-1211 Geneva 4, Switzerland.
[Chichester, Christine; Bairoch, Amos] Univ Geneva, Dept Struct Biol & Bioinformat, CH-1211 Geneva 4, Switzerland.
[Musen, Mark] NCBO, Stanford Med Informat, Stanford, CA 94305 USA.
[Cockerill, Matthew] BioMed Cent, London W1T 4LB, England.
[Packer, Abel] BIREME PAHO WHO, SciELO, BR-04023901 Sao Paulo, Brazil.
[Pacheco, Roberto] Ist Stela, BR-88034050 Florianopolis, SC, Brazil.
[Borner, Katy] WikiMedia Fdn, San Francisco, CA 94107 USA.
[Borner, Katy] Indiana Univ, Bloomington, IN 47405 USA.
RP Mons, B (reprint author), Erasmus MC, Dept Med Informat, Dr Molewaterpl 40-50, NL-3015 GE Rotterdam, Netherlands.
EM b.mons@erasmusmc.nl
RI Packer, Abel/C-1705-2009; Packer, Abel Laerte/J-9350-2012;
OI Bairoch, Amos/0000-0003-2826-6444; Mons, Barend/0000-0003-3934-0072;
Packer, Abel Laerte/0000-0001-9610-5728; Cockerill,
Matthew/0000-0002-3435-1082; Lewis, Suzanna/0000-0002-8343-612X; van
Mulligen, Erik/0000-0003-1377-9386; Hermjakob,
Henning/0000-0001-8479-0262
NR 31
TC 84
Z9 87
U1 1
U2 8
PU BIOMED CENTRAL LTD
PI LONDON
PA 236 GRAYS INN RD, FLOOR 6, LONDON WC1X 8HL, ENGLAND
SN 1474-760X
J9 GENOME BIOL
JI Genome Biol.
PY 2008
VL 9
IS 5
AR R89
DI 10.1186/gb-2008-9-5-r89
PG 15
WC Biotechnology & Applied Microbiology; Genetics & Heredity
SC Biotechnology & Applied Microbiology; Genetics & Heredity
GA 325CC
UT WOS:000257564800019
PM 18507872
ER
PT J
AU Podar, M
Anderson, I
Makarova, KS
Elkins, JG
Ivanova, N
Wall, MA
Lykidis, A
Mavromatis, K
Sun, H
Hudson, ME
Chen, W
Deciu, C
Hutchison, D
Eads, JR
Anderson, A
Fernandes, F
Szeto, E
Lapidus, A
Kyrpides, NC
Saier, MH
Richardson, PM
Rachel, R
Huber, H
Eisen, JA
Koonin, EV
Keller, M
Stetter, KO
AF Podar, Mircea
Anderson, Iain
Makarova, Kira S.
Elkins, James G.
Ivanova, Natalia
Wall, Mark A.
Lykidis, Athanasios
Mavromatis, Kostantinos
Sun, Hui
Hudson, Matthew E.
Chen, Wenqiong
Deciu, Cosmin
Hutchison, Don
Eads, Jonathan R.
Anderson, Abraham
Fernandes, Fillipe
Szeto, Ernest
Lapidus, Alla
Kyrpides, Nikos C.
Saier, Milton H., Jr.
Richardson, Paul M.
Rachel, Reinhard
Huber, Harald
Eisen, Jonathan A.
Koonin, Eugene V.
Keller, Martin
Stetter, Karl O.
TI A genomic analysis of the archaeal system Ignicoccus
hospitalis-Nanoarchaeum equitans
SO GENOME BIOLOGY
LA English
DT Article
ID HORIZONTAL GENE-TRANSFER; PYRUVATE-FERREDOXIN OXIDOREDUCTASE;
HYDROGENOBACTER-THERMOPHILUS TK-6; HYPERTHERMOPHILIC ARCHAEON; NITRATE
REDUCTION; OUTER-MEMBRANE; TRANSFER-RNAS; SP-NOV; EVOLUTION; DOMAIN
AB Background: The relationship between the hyperthermophiles Ignicoccus hospitalis and Nanoarchaeum equitans is the only known example of a specific association between two species of Archaea. Little is known about the mechanisms that enable this relationship.
Results: We sequenced the complete genome of I. hospitalis and found it to be the smallest among independent, free-living organisms. A comparative genomic reconstruction suggests that the I. hospitalis lineage has lost most of the genes associated with a heterotrophic metabolism that is characteristic of most of the Crenarchaeota. A streamlined genome is also suggested by a low frequency of paralogs and fragmentation of many operons. However, this process appears to be partially balanced by lateral gene transfer from archaeal and bacterial sources.
Conclusions: A combination of genomic and cellular features suggests highly efficient adaptation to the low energy yield of sulfur-hydrogen respiration and efficient inorganic carbon and nitrogen assimilation. Evidence of lateral gene exchange between N. equitans and I. hospitalis indicates that the relationship has impacted both genomes. This association is the simplest symbiotic system known to date and a unique model for studying mechanisms of interspecific relationships at the genomic and metabolic levels.
C1 [Podar, Mircea; Elkins, James G.; Keller, Martin] Oak Ridge Natl Lab, Biosci Div, Oak Ridge, TN 37831 USA.
[Anderson, Iain; Ivanova, Natalia; Lykidis, Athanasios; Mavromatis, Kostantinos; Sun, Hui; Szeto, Ernest; Lapidus, Alla; Kyrpides, Nikos C.; Richardson, Paul M.] DOE Joint Genome Inst, Walnut Creek, CA 94598 USA.
[Makarova, Kira S.; Koonin, Eugene V.] Natl Lib Med, Natl Ctr Biotechnol Informat, NIH, Bethesda, MD 20894 USA.
[Wall, Mark A.; Hudson, Matthew E.; Chen, Wenqiong; Deciu, Cosmin; Hutchison, Don; Eads, Jonathan R.; Anderson, Abraham; Fernandes, Fillipe] Verenium Corp, San Diego, CA 92121 USA.
[Saier, Milton H., Jr.] Univ Calif San Diego, Div Biol Sci, La Jolla, CA 92037 USA.
[Rachel, Reinhard; Huber, Harald; Stetter, Karl O.] Univ Regensburg, Lehrstuhl Mikrobiol Archaeenzentrum, D-93053 Regensburg, Germany.
[Eisen, Jonathan A.] Univ Calif Davis, Genome Ctr, Davis, CA 95616 USA.
RP Podar, M (reprint author), Oak Ridge Natl Lab, Biosci Div, 1 Bethel Valley Rd, Oak Ridge, TN 37831 USA.
EM podarm@ornl.gov
RI Hudson, Matthew/A-4438-2008; Keller, Martin/C-4416-2012; Elkins,
James/A-6199-2011; Kyrpides, Nikos/A-6305-2014; Lapidus,
Alla/I-4348-2013;
OI Hudson, Matthew/0000-0002-4737-0936; Elkins, James/0000-0002-8052-5688;
Kyrpides, Nikos/0000-0002-6131-0462; Lapidus, Alla/0000-0003-0427-8731;
Podar, Mircea/0000-0003-2776-0205; Eisen, Jonathan
A./0000-0002-0159-2197
FU US Department of Energy [DE-AC05-00OR22725]; Office of Science; Oak
Ridge National Laboratory (ORNL); National Institutes of Health;
National Library of Medicine; Deutsche Forschungsgemeinschaft
FX We thank Diversa/Verenium Corporation (San Diego, CA), JGI production
sequencing group and the Computational Biology Group at Oak Ridge
National Laboratory (Oak Ridge, TN) for sequencing and annotation
support. MP, JGE and MK were supported by the US Department of Energy,
Office of Science, Biological and Environmental Research programs at Oak
Ridge National Laboratory (ORNL). ORNL is managed by UT-Battelle, LLC,
for the US Department of Energy under contract DE-AC05-00OR22725.
Support for sequencing and data analysis was provided by the Joint
Genome Institute, the US Department of Energy (IA, NI, AL, KM, HS, ES,
AL, NK and PR). Diversa Corporation provided support for MP, MW, WC, CD,
DH, JRE, AA and FF. KSM and EVK are supported by the Intramural Research
Program of the National Institutes of Health, National Library of
Medicine. HH, RR and KOS were supported by grants from the Deutsche
Forschungsgemeinschaft.
NR 97
TC 63
Z9 190
U1 1
U2 14
PU BIOMED CENTRAL LTD
PI LONDON
PA 236 GRAYS INN RD, FLOOR 6, LONDON WC1X 8HL, ENGLAND
SN 1474-760X
J9 GENOME BIOL
JI Genome Biol.
PY 2008
VL 9
IS 11
AR R158
DI 10.1186/gb-2008-9-11-r158
PG 18
WC Biotechnology & Applied Microbiology; Genetics & Heredity
SC Biotechnology & Applied Microbiology; Genetics & Heredity
GA 377TI
UT WOS:000261273100005
PM 19000309
ER
PT J
AU Price, MN
Dehal, PS
Arkin, AP
AF Price, Morgan N.
Dehal, Paramvir S.
Arkin, Adam P.
TI Horizontal gene transfer and the evolution of transcriptional regulation
in Escherichia coli
SO GENOME BIOLOGY
LA English
DT Article
ID FACTOR-BINDING SITES; PHYLOGENETIC ANALYSIS; MAXIMUM-LIKELIHOOD; GENOME
EVOLUTION; SELFISH OPERONS; NETWORK; PROTEIN; DNA; PROKARYOTES;
BACTERIAL
AB Background: Most bacterial genes were acquired by horizontal gene transfer from other bacteria instead of being inherited by continuous vertical descent from an ancient ancestor. To understand how the regulation of these acquired genes evolved, we examined the evolutionary histories of transcription factors and of regulatory interactions from the model bacterium Escherichia coli K12.
Results: Although most transcription factors have paralogs, these usually arose by horizontal gene transfer rather than by duplication within the E. coli lineage, as previously believed. In general, most neighbor regulators-regulators that are adjacent to genes that they regulate-were acquired by horizontal gene transfer, whereas most global regulators evolved vertically within the gamma-Proteobacteria. Neighbor regulators were often acquired together with the adjacent operon that they regulate, and so the proximity might be maintained by repeated transfers (like 'selfish operons'). Many of the as yet uncharacterized (putative) regulators have also been acquired together with adjacent genes, and so we predict that these are neighbor regulators as well. When we analyzed the histories of regulatory interactions, we found that the evolution of regulation by duplication was rare, and surprisingly, many of the regulatory interactions that are shared between paralogs result from convergent evolution. Another surprise was that horizontally transferred genes are more likely than other genes to be regulated by multiple regulators, and most of this complex regulation probably evolved after the transfer.
Conclusion: Our findings highlight the rapid evolution of niche-specific gene regulation in bacteria.
C1 [Price, Morgan N.; Dehal, Paramvir S.; Arkin, Adam P.] Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
[Price, Morgan N.; Dehal, Paramvir S.; Arkin, Adam P.] Univ Calif Berkeley, Lawrence Berkeley Lab, Virtual Inst Microbiol Stress & Survival, Berkeley, CA 94720 USA.
[Arkin, Adam P.] Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Bioengn, Berkeley, CA 94720 USA.
RP Price, MN (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biosci Div, 1 Cyclotron Rd,Mailstop 977-152, Berkeley, CA 94720 USA.
EM morgannprice@yahoo.com
RI Arkin, Adam/A-6751-2008
OI Arkin, Adam/0000-0002-4999-2931
FU Howard Hughes Medical Institute
NR 63
TC 64
Z9 65
U1 3
U2 10
PU BIOMED CENTRAL LTD
PI LONDON
PA 236 GRAYS INN RD, FLOOR 6, LONDON WC1X 8HL, ENGLAND
SN 1474-760X
J9 GENOME BIOL
JI Genome Biol.
PY 2008
VL 9
IS 1
AR R4
DI 10.1186/gb-2008-9-1-r4
PG 20
WC Biotechnology & Applied Microbiology; Genetics & Heredity
SC Biotechnology & Applied Microbiology; Genetics & Heredity
GA 271HP
UT WOS:000253779800012
PM 18179685
ER
PT J
AU Raphael, BJ
Volik, S
Yu, P
Wu, CX
Huang, GQ
Linardopoulou, EV
Trask, BJ
Waldman, F
Costello, J
Pienta, KJ
Mills, GB
Bajsarowicz, K
Kobayashi, Y
Sridharan, S
Paris, P
Tao, QZ
Aerni, SJ
Brown, RP
Bashir, A
Gray, JW
Cheng, JF
de Jong, P
Nefedov, M
Ried, T
Padilla-Nash, HM
Collins, CC
AF Raphael, Benjamin J.
Volik, Stanislav
Yu, Peng
Wu, Chunxiao
Huang, Guiqing
Linardopoulou, Elena V.
Trask, Barbara J.
Waldman, Frederic
Costello, Joseph
Pienta, Kenneth J.
Mills, Gordon B.
Bajsarowicz, Krystyna
Kobayashi, Yasuko
Sridharan, Shivaranjani
Paris, Pamela
Tao, Quanzhou
Aerni, Sarah J.
Brown, Raymond P.
Bashir, Ali
Gray, Joe W.
Cheng, Jan-Fang
de Jong, Pieter
Nefedov, Mikhail
Ried, Thomas
Padilla-Nash, Hesed M.
Collins, Colin C.
TI A sequence-based survey of the complex structural organization of tumor
genomes
SO GENOME BIOLOGY
LA English
DT Article
ID BREAST-CANCER; SOMATIC MUTATIONS; PROSTATE-CANCER; CELL-LINE; FUSION;
GENES; EXPRESSION; DUPLICATION; CHROMOSOME; EVOLUTION
AB Background: The genomes of many epithelial tumors exhibit extensive chromosomal rearrangements. All classes of genome rearrangements can be identified using End Sequencing Profiling (ESP), which relies on paired-end sequencing of cloned tumor genomes.
Results: In this study, brain, breast, ovary and prostate tumors along with three breast cancer cell lines were surveyed with ESP yielding the largest available collection of sequence-ready tumor genome breakpoints and providing evidence that some rearrangements may be recurrent. Sequencing and fluorescence in situ hybridization (FISH) confirmed translocations and complex tumor genome structures that include co-amplification and packaging of disparate genomic loci with associated molecular heterogeneity. Comparison of the tumor genomes suggests recurrent rearrangements. Some are likely to be novel structural polymorphisms, whereas others may be bona fide somatic rearrangements. A recurrent fusion transcript in breast tumors and a constitutional fusion transcript resulting from a segmental duplication were identified. Analysis of end sequences for single nucleotide polymorphisms (SNPs) revealed candidate somatic mutations and an elevated rate of novel SNPs in an ovarian tumor.
Conclusion: These results suggest that the genomes of many epithelial tumors may be far more dynamic and complex than previously appreciated and that genomic fusions including fusion transcripts and proteins may be common, possibly yielding tumorspecific biomarkers and therapeutic targets.
C1 [Volik, Stanislav; Huang, Guiqing; Waldman, Frederic; Costello, Joseph; Bajsarowicz, Krystyna; Kobayashi, Yasuko; Sridharan, Shivaranjani; Paris, Pamela; Collins, Colin C.] Univ Calif San Francisco, Ctr Comprehens Canc, Canc Res Inst, San Francisco, CA 94115 USA.
[Raphael, Benjamin J.] Brown Univ, Dept Comp Sci, Providence, RI 02912 USA.
[Raphael, Benjamin J.] Brown Univ, Ctr Computat Mol Biol, Providence, RI 02912 USA.
[Yu, Peng] Chinese Natl Human Genome Ctr, Beijing 100016, Peoples R China.
[Wu, Chunxiao] Shandong Prov Hosp, Jinan 250021, Peoples R China.
[Linardopoulou, Elena V.; Trask, Barbara J.] Fred Hutchinson Canc Res Ctr, Div Human Biol, Seattle, WA 98109 USA.
[Pienta, Kenneth J.] Univ Michigan, Dept Internal Med, Ann Arbor, MI 48109 USA.
[Pienta, Kenneth J.] Univ Michigan, Dept Urol, Ann Arbor, MI 48109 USA.
[Mills, Gordon B.] Univ Texas Houston, MD Anderson Canc Ctr, Houston, TX 77030 USA.
[Tao, Quanzhou] Amplicon Express, Pullman, WA 99163 USA.
[Brown, Raymond P.; Bashir, Ali] Stanford Univ, BioMed Informat Program, Stanford, CA 94305 USA.
[Gray, Joe W.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA.
[Cheng, Jan-Fang] Univ Calif Berkeley, Lawrence Berkeley Lab, Genom Div, Berkeley, CA 94720 USA.
[Cheng, Jan-Fang] Univ Calif Berkeley, Lawrence Berkeley Lab, Joint Genome Inst, Berkeley, CA 94720 USA.
[de Jong, Pieter; Nefedov, Mikhail] Childrens Hosp Oakland, BACPAC Resources, Oakland, CA 94609 USA.
[Ried, Thomas; Padilla-Nash, Hesed M.] NCI, Sect Canc Genom, Genet Branch, Ctr Canc Res,NIH, Bethesda, MD 20892 USA.
RP Collins, CC (reprint author), Univ Calif San Francisco, Ctr Comprehens Canc, Canc Res Inst, 2340 Sutter St, San Francisco, CA 94115 USA.
EM collins@cc.ucsf.edu
FU Intramural NIH HHS; NCI NIH HHS [P30 CA 82103, P50 CA083639, P50
CA69568, P50 CA069568, P50 CA058207, P50 CA 83639, P01 CA064602, CA5807,
P01 CA 64602, P30 CA082103, P50 CA 58207, U24 CA 126551, U24 CA126551,
U54 CA 112970, U54 CA112970, U24 CA126477, U24 CA 126477, R33 CA103068];
NHLBI NIH HHS [U01HL66728]; NIGMS NIH HHS [GM00806-06, R01 GM057070-10,
R01 GM057070]
NR 56
TC 28
Z9 28
U1 0
U2 2
PU BIOMED CENTRAL LTD
PI LONDON
PA CURRENT SCIENCE GROUP, MIDDLESEX HOUSE, 34-42 CLEVELAND ST, LONDON W1T
4LB, ENGLAND
SN 1474-760X
J9 GENOME BIOL
JI Genome Biol.
PY 2008
VL 9
IS 3
AR R59
DI 10.1186/gb-2008-9-3-r59
PG 34
WC Biotechnology & Applied Microbiology; Genetics & Heredity
SC Biotechnology & Applied Microbiology; Genetics & Heredity
GA 283TN
UT WOS:000254659500013
PM 18364049
ER
PT J
AU Satou, Y
Mineta, K
Ogasawara, M
Sasakura, Y
Shoguchi, E
Ueno, K
Yamada, L
Matsumoto, J
Wasserscheid, J
Dewar, K
Wiley, GB
Macmil, SL
Roe, BA
Zeller, RW
Hastings, KEM
Lemaire, P
Lindquist, E
Endo, T
Hotta, K
Inaba, K
AF Satou, Yutaka
Mineta, Katsuhiko
Ogasawara, Michio
Sasakura, Yasunori
Shoguchi, Eiichi
Ueno, Keisuke
Yamada, Lixy
Matsumoto, Jun
Wasserscheid, Jessica
Dewar, Ken
Wiley, Graham B.
Macmil, Simone L.
Roe, Bruce A.
Zeller, Robert W.
Hastings, Kenneth E. M.
Lemaire, Patrick
Lindquist, Erika
Endo, Toshinori
Hotta, Kohji
Inaba, Kazuo
TI Improved genome assembly and evidence-based global gene model set for
the chordate Ciona intestinalis: new insight into intron and operon
populations
SO GENOME BIOLOGY
LA English
DT Article
ID INTEGRATED DATABASE; ORIGINS
AB Background: The draft genome sequence of the ascidian Ciona intestinalis, along with associated gene models, has been a valuable research resource. However, recently accumulated expressed sequence tag (EST)/cDNA data have revealed numerous inconsistencies with the gene models due in part to intrinsic limitations in gene prediction programs and in part to the fragmented nature of the assembly.
Results: We have prepared a less-fragmented assembly on the basis of scaffold-joining guided by paired-end EST and bacterial artificial chromosome (BAC) sequences, and BAC chromosomal in situ hybridization data. The new assembly (115.2 Mb) is similar in length to the initial assembly (116.7 Mb) but contains 1,272 (approximately 50%) fewer scaffolds. The largest scaffold in the new assembly incorporates 95 initial-assembly scaffolds. In conjunction with the new assembly, we have prepared a greatly improved global gene model set strictly correlated with the extensive currently available EST data. The total gene number (15,254) is similar to that of the initial set (15,582), but the new set includes 3,330 models at genomic sites where none were present in the initial set, and 1,779 models that represent fusions of multiple previously incomplete models. In approximately half, 5'-ends were precisely mapped using 5'-full-length ESTs, an important refinement even in otherwise unchanged models.
Conclusion: Using these new resources, we identify a population of non-canonical (non-GT-AG) introns and also find that approximately 20% of Ciona genes reside in operons and that operons contain a high proportion of single-exon genes. Thus, the present dataset provides an opportunity to analyze the Ciona genome much more precisely than ever.
C1 [Satou, Yutaka; Shoguchi, Eiichi] Kyoto Univ, Grad Sch Sci, Dept Zool, Kyoto 6068502, Japan.
[Mineta, Katsuhiko; Ueno, Keisuke; Endo, Toshinori] Hokkaido Univ, Grad Sch Informat Sci & Technol, Sapporo, Hokkaido 0600814, Japan.
[Ogasawara, Michio] Chiba Univ, Grad Sch Sci & Technol, Inage Ku, Chiba 2638522, Japan.
[Sasakura, Yasunori; Inaba, Kazuo] Univ Tsukuba, Shimoda Marine Res Ctr, Shizuoka 4150025, Japan.
[Yamada, Lixy] Univ Tokushima, Inst Enzyme Res, Div Dis Prote, Tokushima 7708503, Japan.
[Matsumoto, Jun; Hastings, Kenneth E. M.] McGill Univ, Montreal Neurol Inst, Montreal, PQ H3A 2B4, Canada.
[Matsumoto, Jun; Hastings, Kenneth E. M.] McGill Univ, Dept Neurol & Neurosurg, Montreal, PQ H3A 2B4, Canada.
[Wasserscheid, Jessica; Dewar, Ken] McGill Univ, Genome Quebec Innovat Ctr, Montreal, PQ H3A 2B4, Canada.
[Wasserscheid, Jessica; Dewar, Ken] McGill Univ, Dept Human Genet, Montreal, PQ H3A 2B4, Canada.
[Wiley, Graham B.; Macmil, Simone L.; Roe, Bruce A.] Univ Oklahoma, Adv Ctr Genome Technol, Norman, OK 73019 USA.
[Wiley, Graham B.; Macmil, Simone L.; Roe, Bruce A.] Univ Oklahoma, Dept Chem & Biochem, Norman, OK 73019 USA.
[Zeller, Robert W.] San Diego State Univ, Dept Biol, San Diego, CA 92182 USA.
[Lemaire, Patrick] Univ Mediterranee Aix Marseille, IBDML, CNRS UMR 6216, F-13288 Marseille, France.
[Lindquist, Erika] DOE Joint Genome Inst, Genom Technol Dept, Walnut Creek, CA 94598 USA.
[Hotta, Kohji] Keio Univ, Fac Sci & Technol, Yokohama, Kanagawa 2238522, Japan.
RP Satou, Y (reprint author), Kyoto Univ, Grad Sch Sci, Dept Zool, Kyoto 6068502, Japan.
EM yutaka@ascidian.zool.kyoto-u.ac.jp
RI Lemaire, Patrick/D-4237-2009; MINETA, Katsuhiko /A-5455-2012; Lemaire,
Patrick/B-5560-2012; Satou, Yutaka/K-7131-2012
OI MINETA, Katsuhiko /0000-0002-4727-045X; Lemaire,
Patrick/0000-0003-4925-2009; Satou, Yutaka/0000-0001-5193-0708
FU MEXT, Japan [17687022]; National Science Foundation; Canadian Institutes
of Health Research [MOP-77708]
FX The assembly and gene model optimization work was supported by BIRD of
Japan Science and Technology Agency. Primary sequence data were acquired
under programs funded by Grants-in-aid from MEXT, Japan (YS, No.
17687022), the National Science Foundation (RWZ), and the Canadian
Institutes of Health Research (KD and KEMH, MOP-77708).
NR 24
TC 96
Z9 97
U1 1
U2 5
PU BIOMED CENTRAL LTD
PI LONDON
PA 236 GRAYS INN RD, FLOOR 6, LONDON WC1X 8HL, ENGLAND
SN 1474-760X
J9 GENOME BIOL
JI Genome Biol.
PY 2008
VL 9
IS 10
AR R152
DI 10.1186/gb-2008-9-10-r152
PG 11
WC Biotechnology & Applied Microbiology; Genetics & Heredity
SC Biotechnology & Applied Microbiology; Genetics & Heredity
GA 367YA
UT WOS:000260587300014
PM 18854010
ER
PT J
AU Simmons, BA
Loque, D
Blanch, HW
AF Simmons, Blake A.
Loque, Dominique
Blanch, Harvey W.
TI Next-generation biomass feedstocks for biofuel production
SO GENOME BIOLOGY
LA English
DT Review
ID ROTATION WOODY CROPS; BIOENERGY FEEDSTOCK; AGRICULTURAL LAND;
CLIMATE-CHANGE; UNITED-STATES; ETHANOL; ENERGY; CARBON; SWITCHGRASS;
MISCANTHUS
AB The development of second-generation biofuels - those that do not rely on grain crops as inputs will require a diverse set of feedstocks that can be grown sustainably and processed cost-effectively. Here we review the outlook and challenges for meeting hoped-for production targets for such biofuels in the United States.
C1 [Simmons, Blake A.; Loque, Dominique; Blanch, Harvey W.] Joint BioEnergy Inst, Emeryville, CA 94608 USA.
[Simmons, Blake A.] Sandia Natl Labs, Energy Syst Dept, Livermore, CA 94551 USA.
[Blanch, Harvey W.] Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA.
RP Simmons, BA (reprint author), Joint BioEnergy Inst, Emeryville, CA 94608 USA.
EM basimmo@sandia.gov
RI Loque, Dominique/A-8153-2008;
OI Simmons, Blake/0000-0002-1332-1810
FU US Department of Energy; Office of Science; Office of Biological and
Environmental Research [DE-AC02-05CH11231]; Lawrence Berkeley National
Laboratory
FX This work was part of the DOE Joint BioEnergy Institute
(http://www.jbei.org) supported by the US Department of Energy, Office
of Science, Office of Biological and Environmental Research, through
contract DE-AC02-05CH11231 between Lawrence Berkeley National Laboratory
and the US Department of Energy.
NR 43
TC 82
Z9 83
U1 2
U2 46
PU BIOMED CENTRAL LTD
PI LONDON
PA CURRENT SCIENCE GROUP, MIDDLESEX HOUSE, 34-42 CLEVELAND ST, LONDON W1T
4LB, ENGLAND
SN 1474-760X
J9 GENOME BIOL
JI Genome Biol.
PY 2008
VL 9
IS 12
AR 242
DI 10.1186/gb-2008-9-12-242
PG 6
WC Biotechnology & Applied Microbiology; Genetics & Heredity
SC Biotechnology & Applied Microbiology; Genetics & Heredity
GA 403HQ
UT WOS:000263074100003
PM 19133109
ER
PT J
AU Scannell, DR
Wolfe, KH
AF Scannell, Devin R.
Wolfe, Kenneth H.
TI A burst of protein sequence evolution and a prolonged period of
asymmetric evolution follow gene duplication in yeast
SO GENOME RESEARCH
LA English
DT Article
ID WHOLE-GENOME DUPLICATION; SACCHAROMYCES-CEREVISIAE; FUNCTIONAL
DIVERGENCE; PRESERVATION; RATES; PROBABILITY; REPLACEMENT; LIKELIHOOD;
SPECIATION; PHYLOGENY
AB It is widely accepted that newly arisen duplicate gene pairs experience all altered selective regime that is often manifested as all increase ill the rate of protein sequence evolution. Marly details about the nature of the rate acceleration remain unknown, however, including its typical magnitude and duration, and whether it applies to both gene copies or just one. We provide initial answers to these questions by comparing the rate of protein sequence evolution among eight yeast species, between a large set of duplicate gene pairs that were created by a whole-genome duplication (WGD) and a set of genes that were returned to single-copy after this event. Importantly, we use a new method that takes into account the tendency for slowly evolving genes to be retained preferentially ill duplicate. We show that, oil average, proteins encoded by duplicate gene pairs evolved at least three times faster immediately after the WGD than single-copy genes to which they behave identically ill non-WGD lineages. Although the high rate ill duplicated genes subsequently declined rapidly, it has not yet returned to the typical rate for single-copy genes. Ill addition, we show that although duplicate gene pairs often have highly asymmetric rates of evolution, even the slower members of pairs show evidence of a burst of protein sequence evolution immediately after duplication. We discuss the contribution Of neofunctionlization to duplicate gene preservation and propose that a form of subfunctionalization mediated by coding region activity-reducing mutations is likely to have played all important role.
C1 [Scannell, Devin R.; Wolfe, Kenneth H.] Univ Dublin Trinity Coll, Smurfit Inst Genet, Dublin 2, Ireland.
RP Scannell, DR (reprint author), Lawrence Berkeley Natl Lab, 1 Cyclotron Rd,MS 84R0171, Berkeley, CA 94720 USA.
EM DScannell@lbl.gov
RI Wolfe, Kenneth/B-4653-2009;
OI Scannell, Devin/0000-0002-8188-5992; Wolfe, Kenneth/0000-0003-4992-4979
NR 54
TC 67
Z9 67
U1 1
U2 10
PU COLD SPRING HARBOR LAB PRESS, PUBLICATIONS DEPT
PI WOODBURY
PA 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2924 USA
SN 1088-9051
J9 GENOME RES
JI Genome Res.
PD JAN
PY 2008
VL 18
IS 1
BP 137
EP 147
DI 10.1101/gr.6341207
PG 11
WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology;
Genetics & Heredity
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology;
Genetics & Heredity
GA 245UW
UT WOS:000251965300014
PM 18025270
ER
PT J
AU Yang, L
Steefel, CI
AF Yang, Li
Steefel, Carl I.
TI Kaolinite dissolution and precipitation kinetics at 22 degrees C and pH
4
SO GEOCHIMICA ET COSMOCHIMICA ACTA
LA English
DT Article
ID AQUEOUS-SOLUTIONS; CRYSTAL-GROWTH; CHEMICAL AFFINITY; RATES;
25-DEGREES-C; 80-DEGREES-C; TEMPERATURE; MINERALS; ALUMINUM; GIBBSITE
AB Dissolution and precipitation rates of low defect Georgia kaolinite (KGa-1b) as a function of Gibbs free energy of reaction (or reaction affinity) were measured at 22 C and pH 4 in continuously stirred flowthrough reactors. Steady state dissolution experiments showed slightly incongruent dissolution, with a Si/Al ratio of about 1.12 that is attributed to the re-adsorption of Al on to the kaolinite surface. No inhibition of the kaolinite dissolution rate was apparent when dissolved aluminum was varied from 0 and 60 mu M. The relationship between dissolution rates and the reaction affinity can be described well by a Transition State Theory (TST) rate formulation with a Temkin coefficient of 2
[GRAPHICS]
Stopping of flow in a close to equilibrium dissolution experiment yielded a solubility constant for kaolinite at 22 degrees C of 10(7.57).
Experiments on the precipitation kinetics of kaolinite showed a more complex behavior. One conducted using kaolinite seed that had previously undergone extensive dissolution under far froth equilibrium conditions for 5 months showed a quasi-steady state precipitation rate for 105 h that was compatible with the TST expression above. After this initial period, however, precipitation rates decreased by an order of magnitude, and like other precipitation experiments conducted at higher supersaturation and without kaolinite seed subjected to extensive prior dissolution, could not be described with the TST law. The initial quasi-steady state rate is interpreted as growth on activated sites created by the dissolution process, but this reversible growth mechanism could not be maintained once these sites were filled. Long-term precipitation rates showed a linear dependence on solution saturation state that is generally consistent with a two-dimensional nucleation growth mechanism following the equation
[GRAPHICS]
Further analysis using Synchrotron Scanning Transmission X-ray Microscopy (STXM) in Total Electron Yield (TEY) mode of the material from the precipitation experiments showed spectra for newly precipitated material compatible with kaolinite. An idealized set of reactive transport simulations of the chemical weathering of albite to kaolinite using rate laws from (Hellmann R. and Tisserand D. (2006) Dissolution kinetics as a function of the Gibbs free energy of reaction: an experimental study based on albite feldspar. Geochim. Cosmochim. Acta 70(2) 1037-1052) and this study respectively indicate that while pore waters are likely to be close to equilibrium with respect to kaolinite at pH 4, significant kaolinite supersaturation may occur at higher pH if its precipitation rate is pH-dependent. (c) 2007 Elsevier Ltd. All rights reserved.
C1 [Yang, Li; Steefel, Carl I.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA.
RP Steefel, CI (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, 1 Cyclotron Rd,Mail Stop 90-1116, Berkeley, CA 94720 USA.
EM CISteefel@lbl.gov
RI YANG, LI/F-9392-2010; Steefel, Carl/B-7758-2010
NR 48
TC 53
Z9 53
U1 9
U2 39
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0016-7037
J9 GEOCHIM COSMOCHIM AC
JI Geochim. Cosmochim. Acta
PD JAN 1
PY 2008
VL 72
IS 1
BP 99
EP 116
DI 10.1016/j.gca.2007.10.011
PG 18
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 250NJ
UT WOS:000252306700006
ER
PT J
AU Soderholm, L
Skanthakumar, S
Gorman-Lewis, D
Jensen, MP
Nagy, KL
AF Soderholm, L.
Skanthakumar, S.
Gorman-Lewis, D.
Jensen, M. P.
Nagy, K. L.
TI Characterizing solution and solid-phase amorphous uranyl silicates
SO GEOCHIMICA ET COSMOCHIMICA ACTA
LA English
DT Article
ID INDUCED FLUORESCENCE SPECTROSCOPY; X-RAY-SCATTERING; SILICIC-ACID;
AQUEOUS-SOLUTION; HANFORD-SITE; URANIUM(VI) SORPTION; SODIUM
BOLTWOODITE; SURFACE SPECIATION; GAS-CHROMATOGRAPHY; CRYSTAL-STRUCTURE
AB A combination of high-energy X-ray scattering (HEXS) and X-ray diffraction (XRD) is used to structurally and chemically characterize uranyl-silicate solutions and precipitates. Starting with a U to Si ratio of 1:2, solutions prepared at room temperature from pH 2.2 to 9.0 and at 150 degrees C from pH 5.1 to 9.1 showed U-U correlations out to distances of 10 angstrom or longer in both final solutions and precipitates. With one exception, all of the precipitates were amorphous, with no evidence of Bragg diffraction in the XRD data. The room temperature samples above pH 3.1 all had similar Fourier transforms of their HEXS data, which were obtained from suspended slurries or precipitates. In contrast, the hydrothermal sample precipitates showed considerable variation in their HEXS correlations at longer distances. The XRD pattern of the hydrothermal sample with a pH of 5.1 exhibited Bragg reflections indexable as soddyite. While showing no evidence of crystallinity using XRD, the hydrothermal sample at pH 6 showed similar HEXS correlations, which evolved in samples at increasing pH into correlations more consistent with sodium boltwoodite. These findings are supported by thermodynamic modeling. The structural correlations seen in the HEXS data to distances of about 4 angstrom are similar in all samples prepared at pH 4 or higher. This similarity of structure is used to propose a model for solid formation that includes a uranyl silicate building block, or synthon, which preorganizes in solution. Varying the pH changes how these synthons link into larger structures. (c) 2007 Elsevier Ltd. All rights reserved.
C1 [Soderholm, L.; Skanthakumar, S.; Gorman-Lewis, D.; Jensen, M. P.] Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA.
[Nagy, K. L.] Univ Illinois, Dept Earth & Environm Sci, Chicago, IL 60607 USA.
RP Soderholm, L (reprint author), Argonne Natl Lab, Div Chem, 9700 S Cass Ave,CHM 200, Argonne, IL 60439 USA.
EM ls@anl.gov
RI Jensen, Mark/G-9131-2012
OI Jensen, Mark/0000-0003-4494-6693
NR 73
TC 17
Z9 17
U1 0
U2 13
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0016-7037
J9 GEOCHIM COSMOCHIM AC
JI Geochim. Cosmochim. Acta
PD JAN 1
PY 2008
VL 72
IS 1
BP 140
EP 150
DI 10.1016/j.gca.2007.10.002
PG 11
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 250NJ
UT WOS:000252306700009
ER
PT J
AU Hausrath, EM
Navarre-Sitchler, AK
Sak, PB
Steefel, CI
Brantley, SL
AF Hausrath, Elisabeth M.
Navarre-Sitchler, Alexis K.
Sak, Peter B.
Steefel, Carl I.
Brantley, Susan L.
TI Basalt weathering rates on Earth and the duration of liquid water on the
plains of Gusev Crater, Mars
SO GEOLOGY
LA English
DT Article
DE Mars; basalt; weathering; reactive transport modeling; weathering rind;
pH
ID AQUEOUS ALTERATION; MERIDIANI-PLANUM; SPIRIT ROVER; MGS-TES; OLIVINE;
ROCKS; DISSOLUTION; METEORITES; JAROSITE; HISTORY
AB Where Martian rocks have been exposed to liquid water, chemistry versus depth profiles could elucidate both Martian climate history and potential for life. The persistence of primary minerals in weathered profiles constrains the exposure time to liquid water: on Earth, mineral persistence times range from similar to 10 k.y. (olivine) to similar to 250 k.y. (glass) to similar to 1 m.y. (pyroxene) to similar to 5 m.y. (plagiociase). Such persistence times suggest mineral persistence minima on Mars. However, Martian solutions may have been more acidic than on Earth. Relative mineral weathering rates observed for basalt in Svalbard (Norway) and Costa Rica demonstrate that laboratory pH trends can be used to estimate exposure to liquid water both qualitatively (mineral absence or presence) and quantitatively (using reactive transport models). Qualitatively, if the Martian solution pH >similar to 2, glass should persist longer than olivine; therefore, persistence of glass may be a pH indicator. With evidence for the pH of weathering, the reactive transport code CrunchFlow can quantitatively calculate the minimum duration of exposure to liquid water consistent with a chemical profile. For the profile measured on the surface of the exposed Martian rock known as Humphrey in Gusev Crater, the calculated exposure time is 22 k.y., which is a minimum due to physical erosion. If correct, this estimate is consistent with short-term, episodic alteration accompanied by ongoing surface erosion. More of these depth profiles should be measured to illuminate the weathering history of Mars.
C1 [Hausrath, Elisabeth M.; Navarre-Sitchler, Alexis K.] Penn State Univ, Dept Geosci, University Pk, PA 16802 USA.
[Sak, Peter B.] Dickinson Coll, Dept Geol, Carlisle, PA 17013 USA.
[Steefel, Carl I.] Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA.
[Brantley, Susan L.] Penn State Univ, Dept Geosci, University Pk, PA 16802 USA.
RP Hausrath, EM (reprint author), Johnson Sp Ctr, Houston, TX 77058 USA.
EM Elisabeth.M.Hausrath@nasa.gov
RI Steefel, Carl/B-7758-2010; Navarre-Sitchler, Alexis/J-3389-2014
NR 37
TC 66
Z9 66
U1 4
U2 26
PU GEOLOGICAL SOC AMER, INC
PI BOULDER
PA PO BOX 9140, BOULDER, CO 80301-9140 USA
SN 0091-7613
EI 1943-2682
J9 GEOLOGY
JI Geology
PD JAN
PY 2008
VL 36
IS 1
BP 67
EP 70
DI 10.1130/G24238A.1
PG 4
WC Geology
SC Geology
GA 247YL
UT WOS:000252118400017
ER
PT J
AU Richardson, CD
Hinman, NW
McJunkin, TR
Kotler, JM
Scott, JR
AF Richardson, C. Doc
Hinman, Nancy W.
McJunkin, Timothy R.
Kotler, J. Michelle
Scott, Jill R.
TI Exploring Biosignatures Associated with Thenardite by Geomatrix-Assisted
Laser Desorption/Ionization Fourier Transform Ion Cyclotron Resonance
Mass Spectrometry (GALDI-FTICR-MS)
SO GEOMICROBIOLOGY JOURNAL
LA English
DT Article
DE Glycine; stearic acid; geomatrix; evaporite; GALDI; laser desorption;
mass spectrometry; FTICR-MS
ID TIME-OF-FLIGHT; POLYCYCLIC AROMATIC-HYDROCARBONS; SAMPLE PREPARATION;
INDUCED DESORPTION; AMINO-ACIDS; GAS-CHROMATOGRAPHY; ORGANIC-COMPOUNDS;
MATRIX; IONIZATION; MARS
AB Geomatrix-assisted laser desorption/ionization (GALDI) in conjunction with a Fourier transform ion cyclotron resonance mass spectrometer (FTICR-MS) has been employed to determine how effectively bio/organic molecules associated with the mineral thenardite (Na(2)SO(4)) can be detected. GALDI is based on the ability of the mineral host to assist desorption and ionization of bio/organic molecules without additional sample preparation. When glycine was mixed with thenardite, glycine was deprotonated to produce C(2)H(4)NO(2)(-) at m/z 74.025. The combination of stearic acid with thenardite produced a complex cluster ion at m/z 390.258 in the negative mode, which was assigned a composition of C(18)H(39)O(7)Na(-). A natural sample of thenardite from Searles Lake in California also produced a peak at m/z 390.260. The bio/organic signatures in both the laboratory-based and natural samples were heterogeneously dispersed as revealed by chemical imaging. The detection limits for the stearic acid and thenardite combination were estimated to be 3 parts per trillion or similar to 7 zeptomoles (10(-21)) per laser spot. Attempts to improve the signal-to-noise ratio by co-adding FTICR-MS data predetermined to contain the biosignatures of interest revealed problems due to a lack of phase coherence between data sets.
C1 [McJunkin, Timothy R.; Scott, Jill R.] Idaho Natl Lab, Idaho Falls, ID 83415 USA.
[Richardson, C. Doc; Hinman, Nancy W.; Kotler, J. Michelle] Univ Montana, Dept Geosci, Missoula, MT 59812 USA.
RP Scott, JR (reprint author), Idaho Natl Lab, POB 1625, Idaho Falls, ID 83415 USA.
EM jill.scott@inl.gov
RI McJunkin, Timothy/G-8385-2011; Scott, Jill/G-7275-2012
OI McJunkin, Timothy/0000-0002-4987-9170;
FU National Aeronautics and Space Agency (NASA) [EXB03-0000-0054]; Inland
Northwest Research Alliance (INRA); Montana Space; Idaho National
Laboratory [DEAC0705ID14517]
FX The authors acknowledge support by the National Aeronautics and Space
Agency (NASA) Exobiology Program (EXB03-0000-0054). CDR would also like
to thank Inland Northwest Research Alliance (INRA) and Montana Space
Grant Consortium for support. Research was performed at the Idaho
National Laboratory under DOE/NE Idaho Operations Office Contract
DEAC0705ID14517.
NR 60
TC 7
Z9 7
U1 1
U2 10
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 0149-0451
J9 GEOMICROBIOL J
JI Geomicrobiol. J.
PY 2008
VL 25
IS 7-8
BP 432
EP 440
DI 10.1080/01490450802403115
PG 9
WC Environmental Sciences; Geosciences, Multidisciplinary
SC Environmental Sciences & Ecology; Geology
GA 361IA
UT WOS:000260120100013
ER
PT J
AU Buursink, ML
Johnson, TC
Routh, PS
Knoll, MD
AF Buursink, Marc L.
Johnson, Timothy C.
Routh, Partha S.
Knoll, Michael D.
TI Crosshole radar velocity tomography with finite-frequency Fresnel volume
sensitivities
SO GEOPHYSICAL JOURNAL INTERNATIONAL
LA English
DT Article
DE tomography; electromagnetic theory; hydrogeophysics; wave scattering and
diffraction; wave propagation
ID TRAVEL-TIME TOMOGRAPHY; WAVE-FORM INVERSION; SEISMIC TOMOGRAPHY;
RESOLUTION LIMITS; FRECHET KERNELS; RAY TOMOGRAPHY; RECONSTRUCTION;
WAVEPATHS; MODEL
AB Crosshole-radar velocity tomography is increasingly being used to characterize the electrical and hydrologic properties of the Earth's near-surface. Because radar methods are sensitive to the water content of geologic materials, velocity tomography is a good proxy for imaging soil water retention in the vadose zone and porosity in the saturated zone. In many near-surface environments, radar velocity varies over a few orders of magnitude. Common velocity tomography applies ray theory that assumes infinite frequency propagation. The ray approximation may induce velocity modelling artefacts and loss of localization. We propose an alternative method for computing velocity tomogram sensitivities using Fresnel volumes based on first-order scattering. The Fresnel volume sensitivities account for the finite-frequency of the crosshole radar signal and model the physics of radar propagation more accurately than the ray theory approximation.
We demonstrate that applying finite-frequency Fresnel volume sensitivities provides improved radar velocity tomograms in low contrast environments. Analysis of the singular value decomposition of the sensitivity matrix demonstrates how the finite-frequency inversion recovers and localizes velocity heterogeneities better than ray theory. The singular value spectrum obtained from the full waveform sensitivities matches well with the Fresnel volume results. Furthermore, these basis functions are smooth and localized because the kernels capture the first order wave propagation effect compared to ray based sensitivity, which is a high frequency approximation. Through forward modelling experiments, we validate the finite-frequency sensitivity for crosshole radar velocity. In the Fresnel volume approach, the traveltime picking is more efficient because the datum is the peak of the first pulse rather than the first arrival, and therefore, data pre-processing is simpler and may be easily automated. The synthetic Fresnel volume inversion results show improvements in the final model and the data fits are better when compared to the ray theoretical inversions.
C1 [Buursink, Marc L.] Chevron Energy Technol Co, Houston, TX 77002 USA.
[Johnson, Timothy C.] Idaho Natl Lab, Idaho Falls, ID 83415 USA.
[Routh, Partha S.] Conoco Phillips, Seism Technol Dev, Houston, TX 77079 USA.
[Buursink, Marc L.; Johnson, Timothy C.; Routh, Partha S.; Knoll, Michael D.] Boise State Univ, Dept Geosci, Ctr Geophys Invest Shallow Subsurface, Boise, ID 83725 USA.
RP Buursink, ML (reprint author), Chevron Energy Technol Co, 1500 Louisiana St, Houston, TX 77002 USA.
EM buursink@chevron.com
NR 60
TC 13
Z9 13
U1 1
U2 7
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0956-540X
EI 1365-246X
J9 GEOPHYS J INT
JI Geophys. J. Int.
PD JAN
PY 2008
VL 172
IS 1
BP 1
EP 17
DI 10.1111/j.1365-246X.2007.03589.x
PG 17
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 241QB
UT WOS:000251669800001
ER
PT J
AU Berryman, JG
AF Berryman, James G.
TI Exact seismic velocities for transversely isotropic media and extended
Thomsen formulas for stronger anisotropies
SO GEOPHYSICS
LA English
DT Article
ID WAVE ELASTIC-ANISOTROPY; ORTHORHOMBIC MEDIA; APPROXIMATIONS; CRACKS
AB A different type of approximation to the exact anisotropic wave velocities as a function of incidence angle in transversely isotropic (TI) media is explored. This formulation extends Thomsen's weak anisotropy approach to stronger deviations from isotropy without significantly affecting the equations' simplicity. One easily recognized improvement is that the extreme value of the quasi-SV-wave speed v(sv)(theta) is located at the correct incidence angle theta=theta(ex) rather than always being at the position theta=45 degrees. This holds universally for Thomsen's approximation, although theta(ex)equivalent to 45 degrees actually is never correct for any TI anisotropic medium. Wave-speed magnitudes are more closely approximated for most values of the incidence angle, although there may be some exceptions depending on actual angular location of the extreme value. Furthermore, a special angle theta=theta(m) (close to theextreme point of the SV-wave speed and also needed by the new formulas) can be deduced from the same data normally used in weak anisotropy data analysis. All the main technical results are independent of the physical source of the anisotropy. Two examples illustrate the use of obtained results based on systems having vertical fractures. The first set of model fractures has axes of symmetry randomly oriented in the horizontal plane. Such a system is then isotropic in the horizontal plane and thus exhibits vertical transversely isotropic (VTI) symmetry. The second set of fractures also has its axes of symmetry in the horizontal plane, but (it is assumed) these axes are aligned so the system exhibits horizontal transverse isotropic (HTI) symmetry. Both VTI and HTI systems, as well as any other TI medium (whether because of fractures, layering, or other physical causes), are easily treated with the new phase-speed formulation.
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Berryman, JG (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
EM jgberryman@lbl.gov
RI Berryman, James/A-9712-2008
NR 23
TC 14
Z9 17
U1 1
U2 10
PU SOC EXPLORATION GEOPHYSICISTS
PI TULSA
PA 8801 S YALE ST, TULSA, OK 74137 USA
SN 0016-8033
J9 GEOPHYSICS
JI Geophysics
PD JAN-FEB
PY 2008
VL 73
IS 1
BP D1
EP D10
DI 10.1190/1.2813433
PG 10
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 270VT
UT WOS:000253749000006
ER
PT J
AU Korneev, V
AF Korneev, Valeri
TI Slow waves in fractures filled with viscous fluid
SO GEOPHYSICS
LA English
DT Article
ID HYDRAULIC CONDUCTIVITY; BOREHOLE FRACTURES; ELASTIC-WAVES; TUBE WAVES;
PROPAGATION; SQUIRT; SCALE; ATTENUATION; MODELS; ROCKS
AB Stoneley guided waves in a fluid-filled fracture generally have larger amplitudes than other waves; therefore, their properties need to be incorporated into more realistic models. A fracture is modeled as an infinite layer of viscous fluid bounded by two elastic half-spaces with identical parameters. For small fracture thickness, a simple dispersion equation for wave-propagation velocity is obtained. This velocity is much smaller than the velocity of a fluid wave in a Biot-type solution, in which fracture walls are assumed to be rigid. At seismic prospecting frequencies and realistic fracture thicknesses, the Stoneley guided wave has wavelengths on the order of several meters and a quality factor Q exceeding 10, which indicates the possibility of resonance excitation in fluid-bearing rocks. The velocity and attenuation of Stoneley guided waves are distinctly different at low frequencies for water and for oil. The predominant role of fractures in fluid flow at field scales is supported by permeability data, showing an increase of several orders of magnitude when compared with values obtained at laboratory scales. The data suggest that Stoneley guided waves should be taken into account in theories describing seismic wave propagation in fluid-saturated rocks.
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA.
RP Korneev, V (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA.
EM vakorneev@lbl.gov
NR 37
TC 25
Z9 25
U1 0
U2 9
PU SOC EXPLORATION GEOPHYSICISTS
PI TULSA
PA 8801 S YALE ST, TULSA, OK 74137 USA
SN 0016-8033
EI 1942-2156
J9 GEOPHYSICS
JI Geophysics
PD JAN-FEB
PY 2008
VL 73
IS 1
BP N1
EP N7
DI 10.1190/1.2802174
PG 7
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 270VT
UT WOS:000253749000017
ER
PT J
AU Vasco, DW
Keers, H
Khazanehdari, J
Cooke, A
AF Vasco, D. W.
Keers, Henk
Khazanehdari, Jalal
Cooke, Anthony
TI Seismic imaging of reservoir flow properties: Resolving water influx and
reservoir permeability
SO GEOPHYSICS
LA English
DT Article
ID GULF-OF-MEXICO; TIME; PRESSURE; FIELD; DISCRIMINATION; EQUATIONS; MEDIA
AB Methods for geophysical-model assessment - in particular, the computation of model-parameter resolution - indicate the value and the limitations of time-lapse data in estimating reservoir flow properties. A trajectory-based method for computing sensitivities provides an effective means to compute model-parameter resolution. We examine the common situation in which water encroaches into a reservoir from below, as caused by the upward movement of an oil-water contact. Though the techniques described are not limited to this case, we treat the situation in which the time-lapse response is primarily caused by changes in saturation. Using straightforward techniques, we find that, by including reflections off the top and bottom of a reservoir tens of meters thick, we can infer reservoir permeability based upon time-lapse data. We find that, for the case of water influx from below, using multiple time-lapse snapshots does not necessarily improve the resolution of reservoir permeability. An application to time-lapse data from the Norne field in the North Sea illustrates that we can resolve the permeability near a producing well using reflections from three interfaces associated with the reservoir.
C1 [Vasco, D. W.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA.
[Keers, Henk] Schlumberger Cambridge Res Ltd, Cambridge CB3 0HG, England.
[Khazanehdari, Jalal] Schlumberger Middle E SA, Abu Dhabi, U Arab Emirates.
RP Vasco, DW (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA.
EM dwvasco@lbl.gov; hkeers@oslo.westerngeco.slb.com;
jkhazanehdari@abu-dhabi.oilfield.slb.com; acooke@slb.com
RI Vasco, Donald/I-3167-2016; Vasco, Donald/G-3696-2015
OI Vasco, Donald/0000-0003-1210-8628; Vasco, Donald/0000-0003-1210-8628
NR 41
TC 13
Z9 13
U1 0
U2 2
PU SOC EXPLORATION GEOPHYSICISTS
PI TULSA
PA 8801 S YALE ST, TULSA, OK 74137 USA
SN 0016-8033
EI 1942-2156
J9 GEOPHYSICS
JI Geophysics
PD JAN-FEB
PY 2008
VL 73
IS 1
BP O1
EP O13
DI 10.1190/1.2789395
PG 13
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 270VT
UT WOS:000253749000018
ER
PT S
AU Hrma, P
Kruger, AA
AF Hrma, P.
Kruger, A. A.
BE Liska, M
Galusek, D
Klement, R
Petruskova, V
TI Nuclear waste glasses: Continuous melting and bulk vitrification
SO GLASS - THE CHALLENGE FOR THE 21ST CENTURY
SE Advanced Materials Research
LA English
DT Proceedings Paper
CT 9th Conference of the
European-Society-of-Glass-Science-and-Technology/Annual Meeting of the
International-Commission-on-Glass
CY JUN 22-26, 2008
CL Trencin, SLOVAKIA
SP European Soc Glass Sci & Technol, Int Commiss Glass
DE waste glasses; continuous melting; bulk vitrification
ID SAMPLE
AB This contribution addresses various aspects of nuclear waste vitrification. Nuclear wastes have a variety of components and composition ranges. For each waste composition, the glass must be formulated to possess acceptable processing and product behavior defined in terms of physical and chemical properties that guarantee that the glass can be easily made and resist environmental degradation. Glass formulation is facilitated by developing property-composition models, and the strategy of model development and application is reviewed. However, the large variability of waste compositions presents numerous additional challenges: insoluble solids and molten salts may segregate; foam may hinder heat transfer and slow down the process; molten salts may accumulate in container refractory walls; on cooling, the glass may precipitate crystalline phases. These problems need targeted exploratory research. Examples of specific problems and their possible solutions are discussed.
C1 [Hrma, P.] Pacific NW Natl Lab, POB 999,MSIN K6-24, Richland, WA 99354 USA.
[Kruger, A. A.] US DOE, Off River Protect, Richland, WA 99352 USA.
RP Hrma, P (reprint author), Pacific NW Natl Lab, POB 999,MSIN K6-24, Richland, WA 99354 USA.
EM Pavel.Hrma@pnl.gov; Albert_A_Kruger@orp.doe.gov
NR 15
TC 3
Z9 3
U1 0
U2 6
PU TRANS TECH PUBLICATIONS LTD
PI DURNTEN-ZURICH
PA KREUZSTRASSE 10, 8635 DURNTEN-ZURICH, SWITZERLAND
SN 1022-6680
BN 978-0-87849-387-6
J9 ADV MATER RES-SWITZ
PY 2008
VL 39-40
BP 633
EP +
PG 2
WC Materials Science, Ceramics
SC Materials Science
GA BHX26
UT WOS:000257175200118
ER
PT J
AU Lobell, DB
Field, CB
AF Lobell, David B.
Field, Christopher B.
TI Estimation of the carbon dioxide (CO2) fertilization effect using growth
rate anomalies of CO2 and crop yields since 1961
SO GLOBAL CHANGE BIOLOGY
LA English
DT Article
DE carbon dioxide; climate change; CO2; fertilization; crop yields; food
security; global warming; maize; rice; wheat; yield models
ID CLIMATE-CHANGE; WHEAT YIELD; FOOD; RESPONSES; TRENDS
AB The effect of elevated carbon dioxide (CO2) on crop yields is one of the most uncertain and influential parameters in models used to assess climate change impacts and adaptations. A primary reason for this uncertainty is the limited availability of experimental data on CO2 responses for crops grown under typical field conditions. However, because of historical variations in CO2, each year farmers throughout the world perform uncontrolled yield 'experiments' under different levels of CO2. In this study, measurements of atmospheric CO2 growth rates and crop yields for individual countries since 1961 were compared with empirically determine the average effect of a 1 ppm increase of CO2 on yields of rice, wheat, and maize. Because the gradual increase in CO2 is highly correlated with major changes in technology, management, and other yield controlling factors, we focused on first differences of CO2 and yield time series. Estimates of CO2 responses obtained from this approach were highly uncertain, reflecting the relatively small importance of year-to-year CO2 changes for yield variability. Combining estimates from the top 20 countries for each crop resulted in estimates with substantially less uncertainty than from any individual country. The results indicate that while current datasets cannot reliably constrain estimates beyond previous experimental studies, an empirical approach supported by large amounts of data may provide a potentially valuable and independent assessment of this critical model parameter. For example, analysis of reliable yield records from hundreds of individual, independent locations (as opposed to national scale yield records with poorly defined errors) may result in empirical estimates with useful levels of uncertainty to complement estimates from experimental studies.
C1 Lawrence Livermore Natl Lab, Energy & Environm Directorate, Livermore, CA 94550 USA.
Carnegie Inst Washington, Dept Global Ecol, Stanford, CA 94305 USA.
RP Lobell, DB (reprint author), Lawrence Livermore Natl Lab, Energy & Environm Directorate, Livermore, CA 94550 USA.
EM lobell2@llnl.gov
NR 18
TC 38
Z9 40
U1 1
U2 25
PU BLACKWELL PUBLISHING
PI OXFORD
PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND
SN 1354-1013
J9 GLOBAL CHANGE BIOL
JI Glob. Change Biol.
PD JAN
PY 2008
VL 14
IS 1
BP 39
EP 45
DI 10.1111/j.1365-2486.2007.01476.x
PG 7
WC Biodiversity Conservation; Ecology; Environmental Sciences
SC Biodiversity & Conservation; Environmental Sciences & Ecology
GA 237ZE
UT WOS:000251415000004
ER
PT S
AU Liu, YL
Ou, CH
Li, Z
Corbett, C
Mukherjee, B
Ghosal, D
AF Liu, Yali
Ou, Canhui
Li, Zhi
Corbett, Cherita
Mukherjee, Biswanath
Ghosal, Dipak
GP IEEE
TI Wavelet-Based Traffic Analysis for Identifying Video Streams over
Broadband Networks
SO GLOBECOM 2008 - 2008 IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE
SE IEEE Global Telecommunications Conference (Globecom)
LA English
DT Proceedings Paper
CT IEEE Global Telecommunications Conference (GLOBECOM 08)
CY NOV 30-DEC 04, 2008
CL New Orleans, LA
SP IEEE
AB Network and service providers are rapidly deploying IPTV networks to deliver a wide variety of video content to subscribers. Some video content may be protected by copyright and/or may be subject to distribution restrictions. Encryption technologies may not always be effective to manage protected video content, particularly when video content is legally decrypted upon receipt by a subscriber. This paper presents a new approach to detect if specific (or protected) downloaded video is being redistributed by a subscriber using the broadband internet connection. The approach employs a traffic-based signature of the protected video clip. The signature which is shown to be unique is stored in a signature store. We adopt a wavelet-based analysis to match video streams captured from the network to the signatures in the store. The performance of the detection algorithm is evaluated using a large video database populated with a variety of movies and TV shows. The experiment results show that our algorithm achieves high detection rates and low false alarm rates using video clips of only a few seconds.
C1 [Liu, Yali] Univ Calif Davis, Dept Elect & Comp Engn, Davis, CA 95616 USA.
[Ou, Canhui] Univ Calif Berkeley, Haas Sch Business, Berkeley, CA 94720 USA.
[Li, Zhi] AT&T Labs, San Ramon, CA 94583 USA.
[Corbett, Cherita] Sandia Natl Labs, Livermore, CA 94551 USA.
[Mukherjee, Biswanath; Ghosal, Dipak] Univ Calif Davis, Dept Comp Sci, Davis, CA 95616 USA.
RP Liu, YL (reprint author), Univ Calif Davis, Dept Elect & Comp Engn, Davis, CA 95616 USA.
EM yliu@ucdavis.edu
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 1930-529X
BN 978-1-4244-2324-8
J9 GLOB TELECOMM CONF
PY 2008
DI 10.1109/GLOCOM.2008.ECP.338
PG 6
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BTS44
UT WOS:000287978001159
ER
PT S
AU Sun, B
Shrestha, D
Yan, GH
Xiao, Y
AF Sun, Bo
Shrestha, Dibesh
Yan, Guanhua
Xiao, Yang
GP IEEE
TI Self-propagate Mal-packets in Wireless Sensor Networks: Dynamics and
Defense Implications
SO GLOBECOM 2008 - 2008 IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE
SE IEEE Global Telecommunications Conference (Globecom)
LA English
DT Proceedings Paper
CT IEEE Global Telecommunications Conference (GLOBECOM 08)
CY NOV 30-DEC 04, 2008
CL New Orleans, LA
SP IEEE
ID WORMS
AB In this paper, based on our proposed mal-packet self-propagation models in wireless sensor networks, we use TOSSIM to study their propagation dynamics. We also present a preliminary study of the feasibility of mal-packet defense in sensor networks. Specifically, based on random graph theory and percolation theory, we propose the immunization of the highly-connected nodes in order to partition the network into as many separate pieces as possible, thus preventing or slowing down the mal-packet propagation. We study the percolation threshold of different network densities and the effectiveness of immunization in terms of connection ratio, remaining link ratio, and distribution of component sizes. We also present an analysis of the distribution of component sizes.
C1 [Sun, Bo; Shrestha, Dibesh] Lamar Univ, Dept Comp Sci, Beaumont, TX 77710 USA.
[Yan, Guanhua] Los Alamos Natl Lab, Informat Sci, CCS 3, Los Alamos, NM 87545 USA.
[Xiao, Yang] Univ Alabama, Dept Comp Sci, Tuscaloosa, AL 35487 USA.
RP Sun, B (reprint author), Lamar Univ, Dept Comp Sci, Beaumont, TX 77710 USA.
EM bsun@my.lamar.edu; dshrestha@my.lamar.edu; ghyan@lanl.gov;
yangxiao@ieee.org
FU Texas Advanced Research Program [003581-0006-2006]; US National Science
Foundation (NSF) [DUE-0633445, CNS-0716211, CNS-0737325, CCF-0829827]
FX This research was supported in part by the Texas Advanced Research
Program under grant 003581-0006-2006 and the US National Science
Foundation (NSF) under grants DUE-0633445, CNS-0716211, CNS-0737325, and
CCF-0829827.
NR 15
TC 2
Z9 2
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1930-529X
BN 978-1-4244-2324-8
J9 GLOB TELECOMM CONF
PY 2008
DI 10.1109/GLOCOM.2008.ECP.949
PG 5
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BTS44
UT WOS:000287978005013
ER
PT S
AU Wei, SQ
Kannan, R
Iyengar, S
Rao, NS
AF Wei, Shuangqing
Kannan, Rajgopal
Iyengar, Sitharama
Rao, Nageswara S.
GP IEEE
TI Energy Efficient Estimation of Gaussian Sources Over Inhomogeneous
Gaussian MAC Channels
SO GLOBECOM 2008 - 2008 IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE
SE IEEE Global Telecommunications Conference (Globecom)
LA English
DT Proceedings Paper
CT IEEE Global Telecommunications Conference (GLOBECOM 08)
CY NOV 30-DEC 04, 2008
CL New Orleans, LA
SP IEEE
ID DISTORTION; NETWORKS
AB In this paper, we first provide a joint source and channel coding (JSCC) approach in estimating Gaussian sources over Gaussian MAC channels, as well as its sufficient and necessary condition in restoring Gaussian sources with a prescribed distortion value. An interesting relationship between our proposed joint approach with a more straightforward separate source and channel coding (SSCC) scheme is further established. We then formulate constrained power minimization problems to minimize total transmission power consumption under a distortion constraint for arbitrary in-homogeneous networks under JSCC, SSCC and uncoded scheme (UC). They are transformed to relaxed convex geometric programming problems. Our numerical results exhibit that none of the three schemes is consistently most energy efficient. The proposed JSCC could be more energy efficient than either the uncoded scheme, or SCCC, but not both. In addition, we prove that the optimal decoding order to minimize the total transmission powers for both source and channel coding parts is solely subject to the ordering of MAC channel qualities, and has nothing to do with the ranking of measurement qualities across measuring nodes.
C1 [Wei, Shuangqing] Louisiana State Univ, Dept ECE, Baton Rouge, LA 70803 USA.
[Kannan, Rajgopal; Iyengar, Sitharama] Louisiana State Univ, Dept Comp Sci, Baton Rouge, LA 70803 USA.
[Rao, Nageswara S.] Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA.
RP Wei, SQ (reprint author), Louisiana State Univ, Dept ECE, Baton Rouge, LA 70803 USA.
OI Rao, Nageswara/0000-0002-3408-5941
NR 9
TC 2
Z9 2
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1930-529X
BN 978-1-4244-2324-8
J9 GLOB TELECOMM CONF
PY 2008
DI 10.1109/GLOCOM.2008.ECP.890
PG 5
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BTS44
UT WOS:000287978004142
ER
PT S
AU Yanmaz, E
AF Yanmaz, Evsen
GP IEEE
TI Epidemic Propagation in Overlaid Wireless Networks
SO GLOBECOM 2008 - 2008 IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE
SE IEEE Global Telecommunications Conference (Globecom)
LA English
DT Proceedings Paper
CT IEEE Global Telecommunications Conference (GLOBECOM 08)
CY NOV 30-DEC 04, 2008
CL New Orleans, LA
SP IEEE
AB With the emergence of computer worms that can spread over air interfaces, wireless ad hoc and sensor networks can be vulnerable to node compromises even if the deployed network is not connected to the backbone. Depending on the physical topology of the wireless network, even a single infected node can compromise the whole network. In this work, epidemic (e.g., worm) propagation in a static wireless network is studied, where a number of infected mobile nodes are injected over the existing network. It is shown that the epidemic spread threshold and size depend on the physical topology of the underlying static wireless network as well as the mobility model employed by the infected mobile nodes. More specifically, results show that in a fully-connected static wireless network targeted attacks are more effective, whereas for a random topology random attacks can be sufficient to compromise the whole network.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Yanmaz, E (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
EM eyanmaz@alumni.cmu.edu
NR 14
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1930-529X
BN 978-1-4244-2324-8
J9 GLOB TELECOMM CONF
PY 2008
DI 10.1109/GLOCOM.2008.ECP.35
PG 5
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BTS44
UT WOS:000287978000027
ER
PT S
AU Wall, JS
Simon, MN
Lin, BY
Vinogradov, SN
AF Wall, Joseph S.
Simon, Martha N.
Lin, Beth Y.
Vinogradov, Serge N.
BE Poole, RK
TI Mass mapping of large globin complexes by scanning transmission electron
microscopy
SO GLOBINS AND OTHER NITRIC OXIDE-REACTIVE PROTEINS, PT A
SE Methods in Enzymology
LA English
DT Review; Book Chapter
ID HEXAGONAL BILAYER HEMOGLOBINS; LUMBRICUS-TERRESTRIS; ARCHITECTURE;
FILAMENTS
AB Scanning transmission electron microscopy (STEM) of unstained, freeze-dried biological macromolecules in the dark-field mode provides an image based on the number of electrons elastically scattered by the constituent atoms of the macromolecule. The image of each isolated particle provides information about the projected structure of the latter, and its integrated intensity is directly related to the mass of the selected particle. Particle images can be sorted by shape, providing independent histograms of mass to study assembly/disassembly intermediates. STEM is optimized for low-dose imaging and is suitable for accurate measurement of particle masses over the range from about 30 kDa to 1,000 MDa. This article describes the details of the method developed at the Brookhaven National Laboratory STEM facility and illustrates its application to the mass mapping of large globin complexes.
C1 [Wall, Joseph S.; Simon, Martha N.; Lin, Beth Y.] Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA.
[Vinogradov, Serge N.] Wayne State Univ, Sch Med, Dept Biochem & Mol Biol, Detroit, MI USA.
RP Wall, JS (reprint author), Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA.
NR 14
TC 14
Z9 14
U1 1
U2 3
PU ELSEVIER ACADEMIC PRESS INC
PI SAN DIEGO
PA 525 B STREET, SUITE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0076-6879
BN 978-0-12-374277-3
J9 METHOD ENZYMOL
JI Methods Enzymol.
PY 2008
VL 436
BP 487
EP +
DI 10.1016/S0076-6879(08)36027-3
PG 18
WC Biochemical Research Methods; Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA BHH44
UT WOS:000253294600027
PM 18237650
ER
PT S
AU Frieman, JA
AF Frieman, Joshua A.
BE Pellegrini, P
Daflon, S
Alcaniz, J
Telles, E
TI CHAPTER THREE LECTURES ON DARK ENERGY AND COSMIC ACCELERATION
SO GRADUATE SCHOOL IN ASTRONOMY
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 12th Special Courses at the National-Observatory-of-Rio-de-Janeiro
CY OCT 01-05, 2007
CL Rio de Janeiro, BRAZIL
SP Natl Observ Rio de Janeiro, CoAA, Dept Astron, Res Grp Astron, CAPES
DE dark energy; cosmic acceleration
ID HUBBLE-SPACE-TELESCOPE; DIGITAL SKY SURVEY; NONZERO COSMOLOGICAL
CONSTANT; HIGH-REDSHIFT SUPERNOVAE; LARGE-SCALE STRUCTURE; IA
SUPERNOVAE; LIGHT-CURVE; CROSS-CORRELATION; DISTANT GALAXIES;
SELF-CALIBRATION
AB The discovery ten years ago that the expansion of the Universe is accelerating put in place die present cosmological model, in which the Universe is composed of 4% baryons, 20% dark matter, and 76% dark energy. Yet the underlying cause of cosmic acceleration remains a mystery: it could arise from the repulsive gravity of dark energy - for example, the quantum energy of the vacuum - or it may signal that General Relativity breaks down oil cosmological scales and must be replaced. In these lectures, I present the observational evidence for cosmic acceleration and what it has revealed about dark energy, discuss a few of the theoretical ideas that have been proposed to explain acceleration, and describe the key observational probes that we hope will shed light on this enigma in the coming years. Based oil five lectures given at the XII Ciclo de Cursos Especiais at the Observatorio Nacional, Rio de Janeiro, Brazil, 1-5 October 2007.
C1 [Frieman, Joshua A.] Ctr Particle Astrophys, Fermilab, Batavia, IL 60510 USA.
RP Frieman, JA (reprint author), Ctr Particle Astrophys, Fermilab, Batavia, IL 60510 USA.
NR 117
TC 27
Z9 27
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0587-5
J9 AIP CONF PROC
PY 2008
VL 1057
BP 87
EP 124
PG 38
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA BIJ93
UT WOS:000260168300003
ER
PT J
AU Dietz, ML
Jakab, S
Yamato, K
Bartsch, RA
AF Dietz, Mark L.
Jakab, Sandrine
Yamato, Kazuhiro
Bartsch, Richard A.
TI Stereochemical effects on the mode of facilitated ion transfer into
room-temperature ionic liquids
SO GREEN CHEMISTRY
LA English
DT Article
ID SOLID-STATE STRUCTURE; ACIDIC NITRATE MEDIA; METAL-IONS; STEREOSPECIFIC
SYNTHESIS; EXTRACTION SOLVENTS; DICYCLOHEXANO-18-CROWN-6; STRONTIUM;
MECHANISM; ISOMERS; TRANSISOMERS
AB Crown ether stereochemistry is shown to influence the mode of sodium ion partitioning between acidic nitrate media and a dialkylimidazolium-based room temperature ionic liquid containing various dicyclohexano-18-crown-6 (DCH18C6) isomers, in contrast to an analogous extraction system employing a conventional organic solvent.
C1 [Dietz, Mark L.; Jakab, Sandrine] Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA.
[Jakab, Sandrine] Ecole Natl Super Chim Paris, F-75231 Paris 05, France.
[Yamato, Kazuhiro; Bartsch, Richard A.] Texas Tech Univ, Dept Chem & Biochem, Lubbock, TX 79409 USA.
RP Dietz, ML (reprint author), Argonne Natl Lab, Div Chem, Bldg 200,9700 S Cass Ave, Argonne, IL 60439 USA.
EM mdietz@anl.gov
RI Yamato, Kazuhiro/G-4213-2013
OI Yamato, Kazuhiro/0000-0001-9592-0739
NR 23
TC 22
Z9 23
U1 1
U2 12
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1463-9262
J9 GREEN CHEM
JI Green Chem.
PY 2008
VL 10
IS 2
BP 174
EP 176
DI 10.1039/b713750h
PG 3
WC Chemistry, Multidisciplinary; GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY
SC Chemistry; Science & Technology - Other Topics
GA 258HZ
UT WOS:000252860300006
ER
PT J
AU Zhao, H
Baker, GA
Song, ZY
Olubajo, O
Crittle, T
Peters, D
AF Zhao, Hua
Baker, Gary A.
Song, Zhiyan
Olubajo, Olarongbe
Crittle, Tanisha
Peters, Darkeysha
TI Designing enzyme-compatible ionic liquids that can dissolve
carbohydrates
SO GREEN CHEMISTRY
LA English
DT Article
ID ANTARCTICA LIPASE-B; ACID ESTER SYNTHESIS; ORGANIC-SOLVENTS;
1-N-BUTYL-3-METHYLIMIDAZOLIUM CHLORIDE; ALPHA-CHYMOTRYPSIN;
MOLTEN-SALTS; 1,3-DIMETHYLIMIDAZOLIUM CHLORIDE; CELLULOSE DISSOLUTION;
GLUCOSE SOLVATION; HALOGEN-FREE
AB Recently, there is a rising interest in dissolving a variety of carbohydrates ( such as sugars, starch and cellulose) in ionic liquids (ILs). The solutions of carbohydrates are then conveniently subject to chemical or physical modifications. However, one serious disadvantage of these ILs is their strong tendency in denaturing enzymes. This drawback prohibits the dissolved carbohydrates from being transformed by enzymatic reactions. In the present study, we designed a series of ILs that are able to dissolve carbohydrates but do not considerably inactivate the immobilized lipase B from Candida antarctica. These ILs consist of glycol-substituted cations and acetate anions. They could dissolve more than 10% (wt) cellulose and up to 80% (wt) D-glucose. The transesterification activities of the lipase in these ILs are very comparable with those in hydrophobic ILs. The hydrogen-bond forming anions, oxygen-containing cations, and low cation bulkiness promote the carbohydrate dissolution, while the low anion concentration appears essential for the enzyme stabilization. Therefore, an optimization could be achieved through a fine design of IL structures. To demonstrate the potential applications of these ILs, we performed the enzymatic transesterifications of methyl methacrylate with D-glucose and cellulose, respectively, both fully dissolved in ionic media. In the case of D-glucose, conversions up to 80% were obtained; and in the case of cellulose, conversions up to 89% and isolated yields up to 66% were achieved.
C1 [Zhao, Hua; Song, Zhiyan; Olubajo, Olarongbe; Crittle, Tanisha; Peters, Darkeysha] Savannah State Univ, Chem Program, Savannah, GA 31404 USA.
[Baker, Gary A.] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
RP Zhao, H (reprint author), Savannah State Univ, Chem Program, Savannah, GA 31404 USA.
EM zhaoh@savstate.edu
RI Baker, Gary/H-9444-2016;
OI Baker, Gary/0000-0002-3052-7730; Zhao, Hua/0000-0002-5761-2089
NR 68
TC 245
Z9 260
U1 10
U2 114
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1463-9262
EI 1463-9270
J9 GREEN CHEM
JI Green Chem.
PY 2008
VL 10
IS 6
BP 696
EP 705
DI 10.1039/b801489b
PG 10
WC Chemistry, Multidisciplinary; GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY
SC Chemistry; Science & Technology - Other Topics
GA 308KK
UT WOS:000256388600018
ER
PT S
AU Gilmore, K
Kahn, S
Nordby, M
O'Connor, P
Oliver, J
Radeka, V
Schalk, T
Schindler, R
Van Berg, R
AF Gilmore, Kirk
Kahn, Steven
Nordby, Martin
O'Connor, Paul
Oliver, John
Radeka, Veljko
Schalk, Terry
Schindler, Rafe
Van Berg, Rick
CA LSST Camera Team
BE McLean, IS
Casali, MM
TI The LSST Camera Overview: Design and Performance - art. no. 70140C
SO GROUND-BASED AND AIRBORNE INSTRUMENTATION FOR ASTRONOMY II, PTS 1-4
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
(SPIE)
LA English
DT Proceedings Paper
CT Conference on Ground-Based and Airborne Instrumentation for Astronomy II
CY JUN 23-28, 2008
CL Marseille, FRANCE
SP SPIE, SPIE Europe
DE Survey; Wide-field; LSST; gigapixel; mosaic
AB The LSST camera is a wide-field optical (0.35-1 um) imager designed to provide a 3.5 degree FOV with 0.2 arcsecond/pixel sampling. The detector format will be a circular mosaic providing approximately 3.2 Gigapixels per image. The camera includes a filter mechanism and shuttering capability. It is positioned in the middle of the telescope where cross-sectional area is constrained by optical vignetting and where heat dissipation must be controlled to limit thermal gradients in the optical beam. The fast f/1.2 beam will require tight tolerances on the focal plane mechanical assembly. The focal plane array operates at a temperature of approximately -100 degrees C to achieve desired detector performance.
The focal plane array is contained within a cryostat which incorporates detector front-end electronics and thermal control. The cryostat lens serves as an entrance window and vacuum seal for the cryostat. Similarly, the camera body lens serves as an entrance window and gas seal for the camera housing, which is filled with a suitable gas to provide the operating environment for the shutter and filter change mechanisms. The filter carousel accommodates 5 filters, each 75 cm in diameter, for rapid exchange without external intervention.
C1 [Gilmore, Kirk; Kahn, Steven; Nordby, Martin; Schindler, Rafe] Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
RP Gilmore, K (reprint author), Stanford Linear Accelerator Ctr, POB 20450, Stanford, CA 94309 USA.
NR 5
TC 1
Z9 1
U1 0
U2 3
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7224-3
J9 P SOC PHOTO-OPT INS
PY 2008
VL 7014
BP C140
EP C140
DI 10.1117/12.789947
PN 1-4
PG 11
WC Engineering, Aerospace; Astronomy & Astrophysics; Optics; Physics,
Applied
SC Engineering; Astronomy & Astrophysics; Optics; Physics
GA BII89
UT WOS:000259917700012
ER
PT S
AU Cease, H
Depoy, D
Derylo, G
Diehl, HT
Estrada, J
Flaugher, B
Guarino, V
Kuk, K
Kuhlmann, S
Schultz, K
Schmitt, RL
Stefanik, A
Zhao, A
AF Cease, H.
Depoy, D.
Derylo, G.
Diehl, H. T.
Estrada, J.
Flaugher, B.
Guarino, V.
Kuk, K.
Kuhlmann, S.
Schultz, K.
Schmitt, R. L.
Stefanik, A.
Zhao, A.
BE McLean, IS
Casali, MM
TI THE DARK ENERGY SURVEY CCD IMAGER DESIGN - art. no. 70146N
SO GROUND-BASED AND AIRBORNE INSTRUMENTATION FOR ASTRONOMY II, PTS 1-4
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
(SPIE)
LA English
DT Proceedings Paper
CT Conference on Ground-Based and Airborne Instrumentation for Astronomy II
CY JUN 23-28, 2008
CL Marseille, FRANCE
SP SPIE, SPIE Europe
DE Dark Energy; CCD; imager; design; Blanco; CTIO; Cooling
AB The Dark Energy Survey is planning to use a 3 sq. deg. camera that houses a similar to 0.5m diameter focal plane of 62 2kx4k CCDs. The camera vessel including the optical window cell, focal plate, focal plate mounts, cooling system and thermal controls is described. As part of the development of the mechanical and cooling design, a full scale prototype camera vessel has been constructed and is now being used for multi-CCD readout tests. Results from this prototype camera are described.
C1 [Cease, H.; Derylo, G.; Diehl, H. T.; Estrada, J.; Flaugher, B.; Kuk, K.; Schultz, K.; Schmitt, R. L.; Stefanik, A.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
RP Cease, H (reprint author), Fermilab Natl Accelerator Lab, Box 500, Batavia, IL 60510 USA.
RI Zhao, Huyue /C-3088-2013
NR 5
TC 4
Z9 4
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 978-0-8194-7224-3
J9 P SOC PHOTO-OPT INS
PY 2008
VL 7014
BP N146
EP N146
DI 10.1117/12.788200
PN 1-4
PG 12
WC Engineering, Aerospace; Astronomy & Astrophysics; Optics; Physics,
Applied
SC Engineering; Astronomy & Astrophysics; Optics; Physics
GA BII89
UT WOS:000259917700222
ER
PT S
AU Schmitt, RL
Cease, H
Depoy, D
Diehl, HT
Estrada, J
Flaugher, B
Kuhlmann, S
Onal, B
Stefanik, A
AF Schmitt, R. L.
Cease, H.
DePoy, D.
Diehl, H. T.
Estrada, J.
Flaugher, B.
Kuhlmann, S.
Onal, Birce
Stefanik, A.
BE McLean, IS
Casali, MM
TI Cooling the dark energy camera instrument
SO GROUND-BASED AND AIRBORNE INSTRUMENTATION FOR ASTRONOMY II, PTS 1-4
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Ground-Based and Airborne Instrumentation for Astronomy II
CY JUN 23-28, 2008
CL Marseille, FRANCE
SP SPIE, SPIE Europe
DE DES; DECAM; CTIO; NOAO; CCD; liquid nitrogen; pump; camera cooling
AB DECam, camera for the Dark Energy Survey (DES), is undergoing general design and component testing. For an overview see DePoy, et al in these proceedings. For a description of the imager, see Cease, et al in these proceedings. The CCD instrument will be mounted at the prime focus of the CTIO Blanco 4m telescope. The instrument temperature will be 173K with a heat load of 113W. In similar applications, cooling CCD instruments at the prime focus has been accomplished by three general methods. Liquid nitrogen reservoirs have been constructed to operate in any orientation, pulse tube cryocoolers have been used when tilt angles are limited and Joule-Thompson or Stirling cryocoolers have been used with smaller heat loads. Gifford-MacMahon cooling has been used at the Cassegrain but not at the prime focus. For DES, the combined requirements of high heat load, temperature stability, low vibration, operation in any orientation, liquid nitrogen cost and limited space available led to the design of a pumped, closed loop, circulating nitrogen system. At zenith the instrument will be twelve meters above the pump/cryocooler station. This cooling system expected to have a 10,000 hour maintenance interval. This paper will describe the engineering basis Including the thermal model, unbalanced forces, cooldown time, the single and two-phase flow model.
C1 [Schmitt, R. L.; Cease, H.; Diehl, H. T.; Estrada, J.; Flaugher, B.; Onal, Birce; Stefanik, A.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
RP Schmitt, RL (reprint author), Fermilab Natl Accelerator Lab, Box 500, Batavia, IL 60510 USA.
EM RLSchmitt@fnal.gov
NR 3
TC 2
Z9 2
U1 0
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 978-0-8194-7224-3
J9 PROC SPIE
PY 2008
VL 7014
AR 70146O
DI 10.1117/12.786794
PN 1-4
PG 11
WC Engineering, Aerospace; Astronomy & Astrophysics; Optics; Physics,
Applied
SC Engineering; Astronomy & Astrophysics; Optics; Physics
GA BII89
UT WOS:000259917700223
ER
PT B
AU Clement, WP
Ward, AL
AF Clement, William P.
Ward, Andy L.
BE Allred, BJ
Daniels, JJ
Ehsani, MR
TI GPR Surveys across a Prototype Surface Barrier to Determine Temporal and
Spatial Variations in Soil Moisture Content
SO HANDBOOK OF AGRICULTURAL GEOPHYSICS
SE Books in Soils Plants and the Environment
LA English
DT Article; Book Chapter
ID GROUND-PENETRATING RADAR; TIME-DOMAIN REFLECTOMETRY; WATER-CONTENT
C1 [Clement, William P.] Boise State Univ, Ctr Geophys Invest Shallow Subsurface, Boise, ID 83725 USA.
[Ward, Andy L.] Pacific NW Natl Lab, Nat Resources Div, Richland, WA 99352 USA.
RP Clement, WP (reprint author), Boise State Univ, Ctr Geophys Invest Shallow Subsurface, Boise, ID 83725 USA.
NR 16
TC 3
Z9 3
U1 0
U2 2
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-0-8493-3728-4
J9 BOOKS SOIL PLANT ENV
PY 2008
BP 305
EP 315
PG 11
WC Plant Sciences; Environmental Sciences; Soil Science
SC Plant Sciences; Environmental Sciences & Ecology; Agriculture
GA BKI52
UT WOS:000268213600023
ER
PT B
AU Demmel, J
Parlett, B
Kahan, W
Gu, M
Bindel, D
Hida, Y
Riedy, EJ
Voemel, C
Dongarra, J
Kurzak, J
Buttari, A
Langou, J
Tomov, S
Li, XY
Marques, O
Langou, J
Luszczek, P
AF Demmel, James
Parlett, Beresford
Kahan, William
Gu, Ming
Bindel, David
Hida, Yozo
Riedy, E. Jason
Voemel, Christof
Dongarra, Jack
Kurzak, Jakub
Buttari, Alfredo
Langou, Julie
Tomov, Stanimire
Li, Xiaoye
Marques, Osni
Langou, Julien
Luszczek, Piotr
BE Rajasekaran, S
Reif, J
TI Prospectus for a Dense Linear Algebra Software Library
SO HANDBOOK OF PARALLEL COMPUTING: MODELS, ALGORITHMS AND APPLICATIONS
SE Chapman & Hall-CRC Computer and Information Science Series
LA English
DT Article; Book Chapter
ID MATRIX SIGN FUNCTION; POLYNOMIAL EIGENVALUE PROBLEMS; MULTISHIFT QR
ALGORITHM; HIGH RELATIVE ACCURACY; DECOMPOSITION; FACTORIZATION;
COMPUTATION; REPRESENTATIONS; PERFORMANCE; REDUCTION
C1 [Demmel, James; Parlett, Beresford; Kahan, William; Gu, Ming; Bindel, David; Hida, Yozo; Riedy, E. Jason; Voemel, Christof] Univ Calif Berkeley, Berkeley, CA 94720 USA.
[Tomov, Stanimire] Univ Tennessee, Dept Comp Sci, Knoxville, TN USA.
[Dongarra, Jack] Oak Ridge Natl Lab, Oak Ridge, TN USA.
[Li, Xiaoye; Marques, Osni] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Luszczek, Piotr] MathWorks, Natick, MA USA.
[Langou, Julien] Univ Colorado, Denver, CO 80202 USA.
RP Demmel, J (reprint author), Univ Calif Berkeley, Berkeley, CA 94720 USA.
RI Gu, Min/B-6627-2008
NR 97
TC 0
Z9 0
U1 0
U2 0
PU CHAPMAN & HALL/CRC PRESS
PI BOCA RATON
PA 6000 BROKEN SOUND PKWY, NW, STE 300, BOCA RATON, FL 33487 USA
BN 978-1-58488-623-5
J9 CH CRC COMP INFO SCI
PY 2008
PG 21
WC Computer Science, Hardware & Architecture
SC Computer Science
GA BJN97
UT WOS:000266881800029
ER
PT S
AU Gschneidner, KA
Bunzli, JCG
Pecharsky, VK
AF Gschneidner, Karl A., Jr.
Buenzli, Jean-Claude G.
Pecharsky, Vitalij K.
BE Gschneidner, KA
Bunzli, JCG
Pecharsky, VK
TI HANDBOOK ON THE PHYSICS AND CHEMISTRY OF RARE EARTHS VOLUME 38 PREFACE
SO HANDBOOK ON THE PHYSICS AND CHEMISTRY OF RARE EARTHS, VOL 38
SE Handbook on the Physics and Chemistry of Rare Earths
LA English
DT Editorial Material; Book Chapter
C1 [Pecharsky, Vitalij K.] US DOE, Ames Lab, Ames, IA 50011 USA.
[Pecharsky, Vitalij K.] Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA.
[Buenzli, Jean-Claude G.] Swiss Fed Inst Technol, Lab Lanthanide Supramol Chem, BCH 1402, CH-1015 Lausanne, Switzerland.
NR 0
TC 1
Z9 1
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1573-4366
BN 978-0-08-055762-5
J9 HBK PHYS CHEM RARE
PY 2008
VL 38
BP V
EP X
PG 6
WC Chemistry, Multidisciplinary; Materials Science, Multidisciplinary
SC Chemistry; Materials Science
GA BCO86
UT WOS:000310920200001
ER
PT S
AU Bolotnikov, AE
Babalola, S
Camarda, GS
Cui, Y
Egarievwe, SU
Fochuk, PM
Hawrami, R
Hossain, A
James, JR
Nakonechnyj, IJ
Yang, G
James, RB
AF Bolotnikov, A. E.
Babalola, S.
Camarda, G. S.
Cui, Y.
Egarievwe, S. U.
Fochuk, P. M.
Hawrami, R.
Hossain, A.
James, J. R.
Nakonechnyj, I. J.
Yang, Ge
James, R. B.
BE Burger, A
Franks, LA
James, RB
TI Spectral responses of virtual Frisch-grid CdZnTe detectors and their
relation to IR microscopy and X-ray diffraction topography data
SO HARD X-RAY, GAMMA-RAY, AND NEUTRON DETECTOR PHYSICS X
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
(SPIE)
LA English
DT Proceedings Paper
CT Conference on Hard X-Ray, Gamma-Ray, and Neutron Detector Physics X
CY AUG 11-13, 2008
CL San Diego, CA
DE CdZnTe; gamma-ray detectors; Frisch-grid
ID RADIATION DETECTOR; CRYSTAL-GROWTH
AB Virtual Frisch-grid CdZnTe detectors potentially can provide energy resolution close to the statistical limit. However, in real detectors, the quality of the crystals used to fabricate the devices primarily determines energy resolution. In this paper, we report our findings on the spectral response of devices and their relation to material-characterization data obtained using IR microscopy and X-ray diffraction topography.
C1 [Bolotnikov, A. E.; Camarda, G. S.; Cui, Y.; Hossain, A.; Yang, Ge; James, R. B.] Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Bolotnikov, AE (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
EM bolotnik@bnl.gov
RI Yang, Ge/G-1354-2011; Fochuk, Petro/D-9409-2016;
OI Fochuk, Petro/0000-0002-4149-4882; Nakonechnyi, Igor/0000-0003-3955-2833
NR 28
TC 1
Z9 1
U1 0
U2 4
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7299-1
J9 P SOC PHOTO-OPT INS
PY 2008
VL 7079
AR 707903
DI 10.1117/12.796232
PG 16
WC Instruments & Instrumentation; Optics; Physics, Applied
SC Instruments & Instrumentation; Optics; Physics
GA BIY54
UT WOS:000263710100001
ER
PT S
AU Cherepy, NJ
Kuntz, JD
Roberts, JJ
Hurst, TA
Drury, OB
Sanner, RD
Tillotson, TM
Payne, SA
AF Cherepy, N. J.
Kuntz, J. D.
Roberts, J. J.
Hurst, T. A.
Drury, O. B.
Sanner, R. D.
Tillotson, T. M.
Payne, S. A.
BE Burger, A
Franks, LA
James, RB
TI Transparent Ceramic Scintillator Fabrication, Properties and
Applications
SO HARD X-RAY, GAMMA-RAY, AND NEUTRON DETECTOR PHYSICS X
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
(SPIE)
LA English
DT Proceedings Paper
CT Conference on Hard X-Ray, Gamma-Ray, and Neutron Detector Physics X
CY AUG 11-13, 2008
CL San Diego, CA
DE Scintillators; Garnets; transparent ceramics; gamma ray spectrometers;
radiography scintillators
ID LUTETIURN ALUMINUM GARNET; RESOLUTION; READOUT
AB Transparent ceramics offer an alternative to single crystals for scintillator applications such as gamma ray spectroscopy and radiography. We have developed a versatile, scaleable fabrication method, using Flame Spray Pyrolysis (FSP) to produce feedstock which is readily converted into phase-pure transparent ceramics. We measure integral light yields in excess of 80,000 Ph/MeV with Cerium-doped Garnets, and excellent optical quality. Avalanche photodiode readout of Garnets provides resolution near 6%. For radiography applications, Lutetium Oxide offers a high performance metric and is formable by ceramics processing. Scatter in transparent ceramics due to secondary phases is the principal limitation to optical quality, and afterglow issues that affect the scintillation performance are presently being addressed.
C1 [Cherepy, N. J.; Kuntz, J. D.; Roberts, J. J.; Hurst, T. A.; Drury, O. B.; Sanner, R. D.; Tillotson, T. M.; Payne, S. A.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Cherepy, NJ (reprint author), Lawrence Livermore Natl Lab, 7000 E Ave, Livermore, CA 94550 USA.
EM cherepy1@llnl.gov
RI Cherepy, Nerine/F-6176-2013
OI Cherepy, Nerine/0000-0001-8561-923X
NR 13
TC 4
Z9 4
U1 2
U2 18
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7299-1
J9 P SOC PHOTO-OPT INS
PY 2008
VL 7079
AR 70790X
DI 10.1117/12.797398
PG 6
WC Instruments & Instrumentation; Optics; Physics, Applied
SC Instruments & Instrumentation; Optics; Physics
GA BIY54
UT WOS:000263710100024
ER
PT S
AU Cui, Y
Bolotnikov, A
Hossain, A
Camarda, G
Mycielski, A
Yang, G
Kochanowska, D
Witkowska-Baran, M
James, RB
AF Cui, Y.
Bolotnikov, A.
Hossain, A.
Camarda, G.
Mycielski, A.
Yang, G.
Kochanowska, D.
Witkowska-Baran, M.
James, R. B.
BE Burger, A
Franks, LA
James, RB
TI CdMnTe Crystals for X-ray and Gamma-ray Detection
SO HARD X-RAY, GAMMA-RAY, AND NEUTRON DETECTOR PHYSICS X
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
(SPIE)
LA English
DT Proceedings Paper
CT Conference on Hard X-Ray, Gamma-Ray, and Neutron Detector Physics X
CY AUG 11-13, 2008
CL San Diego, CA
DE Radiation detectors; CdMnTe; CMT; X-ray detection; gamma-ray detection
ID CDTE; TELLURIDE; GROWTH
AB CdMnTe (CMT) can be a good candidate for producing gamma-ray detectors because of its wide band-gap, high resistivity, and good electron transport properties. Further, the ability to grow CMT crystals at relatively low temperatures ensures a high yield for manufacturing detectors with good compositional uniformity and few impurities. Groups at Brookhaven National Laboratory and Institute of Physics are investigating several CMT crystals, selecting a few of them to make detectors. In this paper, we discuss our initial characterization of these crystals and describe our preliminary results with a gamma-ray source.
C1 [Cui, Y.; Bolotnikov, A.; Hossain, A.; Camarda, G.; Yang, G.; James, R. B.] Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Cui, Y (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
EM ycui@bnl.gov
RI Yang, Ge/G-1354-2011; Kochanowska, Dominika/P-8978-2016
NR 20
TC 3
Z9 3
U1 2
U2 9
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7299-1
J9 P SOC PHOTO-OPT INS
PY 2008
VL 7079
AR 70790N
DI 10.1117/12.793366
PG 9
WC Instruments & Instrumentation; Optics; Physics, Applied
SC Instruments & Instrumentation; Optics; Physics
GA BIY54
UT WOS:000263710100016
ER
PT S
AU Duff, MC
Burger, A
Groza, M
Buliga, V
Bradley, JP
Dai, ZR
Teslich, N
Black, DR
Awadalla, SA
Mackenzie, J
Chen, H
AF Duff, Martine C.
Burger, Arnold
Groza, Michael
Buliga, Vladimir
Bradley, John P.
Dai, Zurong R.
Teslich, Nick
Black, David R.
Awadalla, Salah A.
Mackenzie, Jason
Chen, Henry
BE Burger, A
Franks, LA
James, RB
TI Characterization of Detector Grade CdZnTe Material from Redlen
Technologies
SO HARD X-RAY, GAMMA-RAY, AND NEUTRON DETECTOR PHYSICS X
SE Proceedings of SPIE-The International Society for Optical Engineering
LA English
DT Proceedings Paper
CT Conference on Hard X-Ray, Gamma-Ray and Neutron Detector Physics X
CY AUG 11-13, 2008
CL San Diego, CA
DE Surface treatment; traveling heater method; topography; TEM; hydrogen
peroxide etch; secondary phases
ID TRAVELING HEATER METHOD; CADMIUM ZINC TELLURIDE; SEMIINSULATING CDZNTE;
METHOD THM; CRYSTALS; CDTE; PERFORMANCE; HG1-XCDXTE; (CD,ZN)TE; GROWTH
AB CdZnTe (or CZT) crystals can be used in a variety of detector-type applications. This large band gap material shows great promise for use as a gamma radiation spectrometer. Historically, the performance of CZT has typically been adversely affected by point defects, structural and compositional heterogeneities within the crystals, such as twinning, pipes, grain boundaries (polycrystallinity) and secondary phases (SP). The synthesis of CZT material has improved greatly with the primary performance limitation being attributed to mainly SP. In this presentation, we describe the extensive characterization of detector grade material that has been treated with post growth annealing to remove the SPs. Some of the analytical methods used in this study included polarized, cross polarized and transmission IR imaging, I-V curves measurements, synchrotron X-ray topography and electron microscopy.
C1 [Duff, Martine C.] Savannah River Ecol Lab, Aiken, SC 29808 USA.
RP Duff, MC (reprint author), Savannah River Ecol Lab, Aiken, SC 29808 USA.
RI Dai, Zurong/E-6732-2010
NR 23
TC 0
Z9 0
U1 0
U2 5
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7299-1
J9 P SOC PHOTO-OPT INS
PY 2008
VL 7079
AR 70790T
DI 10.1117/12.798921
PG 15
WC Instruments & Instrumentation; Optics; Physics, Applied
SC Instruments & Instrumentation; Optics; Physics
GA BIY54
UT WOS:000263710100021
ER
PT S
AU Gul, R
Li, Z
Rodriguez, R
Keeter, K
Bolotnikov, A
James, R
AF Gul, R.
Li, Z.
Rodriguez, R.
Keeter, K.
Bolotnikov, A.
James, R.
BE Burger, A
Franks, LA
James, RB
TI Defect Measurements in CdZnTe Detectors Using I-DLTS, TCT, I-V, C-V and
gamma-ray Spectroscopy
SO HARD X-RAY, GAMMA-RAY, AND NEUTRON DETECTOR PHYSICS X
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
(SPIE)
LA English
DT Proceedings Paper
CT Conference on Hard X-Ray, Gamma-Ray, and Neutron Detector Physics X
CY AUG 11-13, 2008
CL San Diego, CA
DE CdZnTe detectors; Crystal defects; DLTS; gamma-ray spectroscopy
ID SILICON DETECTORS; N-EFF; NEUTRON
AB In this work we measured the crystal defect levels and tested the performance of CdZnTe detectors by diverse methodologies, viz., Current Deep Level Transient Spectroscopy (I-DLTS), Transient Current Technique (TCT), Current and Capacitance versus Voltage measurements (I-V and C-V), and gamma-ray spectroscopy. Two important characteristics of I-DLTS technique for advancing this research are (1) it is applicable for high-resistivity materials (> 10(6) Omega-cm), and, (2) the minimum temperature for measurements can be as low as 10 K. Such low-temperature capability is excellent for obtaining measurements at shallow levels.
We acquired CdZnTe crystals grown by different techniques from two different vendors and characterized them for point defects and their response to photons. I-DLTS studies encompassed measuring the parameters of the defects, such as the energy levels in the band gap, the carrier capture cross-sections and their densities. The current induced by the laser-generated carriers and the charge collected (or number of electrons collected) were obtained using TCT that also provides the transport properties, such as the carrier life time and mobility of the detectors under study. The detector's electrical characteristics were explored, and its performance tested using I-V, C-V and gamma-ray spectroscopy.
C1 [Gul, R.; Li, Z.; Bolotnikov, A.; James, R.] Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Gul, R (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
NR 9
TC 0
Z9 0
U1 2
U2 5
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7299-1
J9 P SOC PHOTO-OPT INS
PY 2008
VL 7079
AR 70790U
DI 10.1117/12.797865
PG 8
WC Instruments & Instrumentation; Optics; Physics, Applied
SC Instruments & Instrumentation; Optics; Physics
GA BIY54
UT WOS:000263710100022
ER
PT S
AU Hawkins, SA
Teague, LC
Villa-Aleman, E
Duff, MC
Burger, A
Groza, M
Buliga, V
AF Hawkins, Samantha A.
Teague, Lucile C.
Villa-Aleman, Eliel
Duff, Martine C.
Burger, Arnold
Groza, Michael
Buliga, Vladimir
BE Burger, A
Franks, LA
James, RB
TI AFM characterization of laser induced damage on CdZnTe crystal surfaces
SO HARD X-RAY, GAMMA-RAY, AND NEUTRON DETECTOR PHYSICS X
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
(SPIE)
LA English
DT Proceedings Paper
CT Conference on Hard X-Ray, Gamma-Ray, and Neutron Detector Physics X
CY AUG 11-13, 2008
CL San Diego, CA
DE AFM; Raman; CZT; laser-induced damage
ID CADMIUM ZINC TELLURIDE; CD0.96ZN0.04TE THIN-FILMS; RADIATION DETECTORS;
RAMAN-SCATTERING; SPATIAL RESPONSE; CD0.9ZN0.1TE; PERFORMANCE; BRIDGMAN;
DEFECTS; SPECTRA
AB Semi-conducting CdZnTe (or CZT) crystals can be used in a variety of detector-type applications. CZT shows great promise for use as a gamma radiation spectrometer. However, its performance is adversely affected by point defects, structural and compositional heterogeneities within the crystals, such as twinning, pipes, grain boundaries (polycrystallinity), secondary phases and in some cases, damage caused by external forces. One example is damage that occurs during characterization of the surface by a laser during Raman spectroscopy. Even minimal laser power can cause Te enriched areas on the surface to appear. The Raman spectra resulting from measurements at moderate intensity laser power show large increases in peak intensity that is attributed to Te. Atomic Force Microscopy (AFM) was used to characterize the extent of damage to the CZT crystal surface following exposure to the Raman laser. AFM data reveal localized surface damage in the areas exposed to the Raman laser beam. The degree of surface damage to the crystal is dependent on the laser power, with the most observable damage occurring at high laser power. Moreover, intensity increases in the Te peaks of the Raman spectra are observed even at low laser power with little to no visible damage observed by AFM. AFM results also suggest that exposure to the same amount of laser power yields different amounts of surface damage depending on whether the exposed surface is the Te terminating face or the Cd terminating face of CZT.
C1 [Hawkins, Samantha A.; Teague, Lucile C.; Villa-Aleman, Eliel; Duff, Martine C.] Savannah River Ecol Lab, Aiken, SC 29808 USA.
RP Hawkins, SA (reprint author), Savannah River Ecol Lab, Aiken, SC 29808 USA.
NR 27
TC 0
Z9 0
U1 0
U2 2
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7299-1
J9 P SOC PHOTO-OPT INS
PY 2008
VL 7079
AR 70790R
DI 10.1117/12.798574
PG 13
WC Instruments & Instrumentation; Optics; Physics, Applied
SC Instruments & Instrumentation; Optics; Physics
GA BIY54
UT WOS:000263710100020
ER
PT S
AU Hossain, A
Babalola, S
Bolotnikov, AE
Camarda, GS
Cui, Y
Yang, G
Guo, M
Kochanowska, D
Mycielski, A
Burger, A
James, RB
AF Hossain, A.
Babalola, S.
Bolotnikov, A. E.
Camarda, G. S.
Cui, Y.
Yang, G.
Guo, M.
Kochanowska, D.
Mycielski, A.
Burger, A.
James, R. B.
BE Burger, A
Franks, LA
James, RB
TI Effect of chemical etching on the surface roughness of CdZnTe and CdMnTe
gamma radiation detectors
SO HARD X-RAY, GAMMA-RAY, AND NEUTRON DETECTOR PHYSICS X
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
(SPIE)
LA English
DT Proceedings Paper
CT Conference on Hard X-Ray, Gamma-Ray, and Neutron Detector Physics X
CY AUG 11-13, 2008
CL San Diego, CA
DE CdZnTe; CdMnTe; chemical polishing; surface roughness; atomic force
microscopy
ID PERFORMANCE; CDTE; CRYSTAL; TELLURIDE; CHEMISTRY; GROWTH
AB Generally, mechanical polishing is performed to diminish the cutting damage followed by chemical etching to remove the remaining damage on crystal surfaces. In this paper, we detail the findings from our study of the effects of various chemical treatments on the roughness of crystal surfaces. We prepared several CdZnTe (CZT) and CdMnTe (CMT) crystals by mechanical polishing with 5 mu m and/or lower grits of Al(2)O(3) abrasive papers including final polishing with 0.05-mu m particle size alumina powder and then etched them for different periods with a 2%, 5% Bromine-Methanol (B-M) solution, and also with an E-solution (HNO(3):H(2)0:K(2)Cr(2)O(7)). The material removal rate (etching rate) from the crystals was found to be 10 pm, 30 pm, and 15 pm per minute, respectively. The roughness of the resulting surfaces was determined by the Atomic Force Microscopy (AFM) to identify the most efficient surface processing method by combining mechanical and chemical polishing.
C1 [Hossain, A.; Bolotnikov, A. E.; Camarda, G. S.; Cui, Y.; Yang, G.; James, R. B.] Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Hossain, A (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
RI Yang, Ge/G-1354-2011; Kochanowska, Dominika/P-8978-2016
NR 18
TC 0
Z9 0
U1 1
U2 6
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7299-1
J9 P SOC PHOTO-OPT INS
PY 2008
VL 7079
AR 70791E
DI 10.1117/12.796797
PG 8
WC Instruments & Instrumentation; Optics; Physics, Applied
SC Instruments & Instrumentation; Optics; Physics
GA BIY54
UT WOS:000263710100036
ER
PT S
AU Perry, DL
Franks, L
AF Perry, Dale L.
Franks, Larry
BE Burger, A
Franks, LA
James, RB
TI Model compounds for cadmium zinc telluride (CZT) impurities
SO HARD X-RAY, GAMMA-RAY, AND NEUTRON DETECTOR PHYSICS X
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
(SPIE)
LA English
DT Proceedings Paper
CT Conference on Hard X-Ray, Gamma-Ray, and Neutron Detector Physics X
CY AUG 11-13, 2008
CL San Diego, CA
DE Cadmium zinc telluride; CZT; semiconductor detector; fuzzy chemistry
ID ATOMIC-ABSORPTION SPECTROMETRY; PLASMA-MASS SPECTROMETRY;
SYNCHROTRON-RADIATION; ACTIVATION-ANALYSIS; ICP-MS; OXIDE; HYDROXIDE;
PEROXIDE; SAMPLES; COPPER
AB Molecular compounds used as potential experimental models for contaminant inclusions in cadmium zinc telluride (CZT) are discussed. The compounds include those that have been previously directly observed or postulated in previous research studies of CZT and ones that have not yet been observed or studied in either CZT melts or large crystals. Several experimental techniques that are effective for direct interrogation of impurities in solid materials such as CZT are discussed.
C1 [Perry, Dale L.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Perry, DL (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Mail Stop 70A 1150, Berkeley, CA 94720 USA.
NR 33
TC 1
Z9 1
U1 2
U2 6
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7299-1
J9 P SOC PHOTO-OPT INS
PY 2008
VL 7079
AR 70791G
DI 10.1117/12.798941
PG 6
WC Instruments & Instrumentation; Optics; Physics, Applied
SC Instruments & Instrumentation; Optics; Physics
GA BIY54
UT WOS:000263710100038
ER
PT S
AU Seifert, CE
Barnett, DS
Myjak, MJ
AF Seifert, Carolyn E.
Barnett, Debra S.
Myjak, Mitchell J.
BE Burger, A
Franks, LA
James, RB
TI Prospects for Thermal Neutron Detection & Imaging with the GammaTracker
Handheld Radioisotope Identifier
SO HARD X-RAY, GAMMA-RAY, AND NEUTRON DETECTOR PHYSICS X
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
(SPIE)
LA English
DT Proceedings Paper
CT Conference on Hard X-Ray, Gamma-Ray, and Neutron Detector Physics X
CY AUG 11-13, 2008
CL San Diego, CA
DE neutron detection; neutron imaging; cadmium zinc telluride
AB We present measured data on the neutron detection response of the GammaTracker handheld radioisotope identifier. Two neutron detection modes are discussed: measuring absorption gamma rays from the cadmium present in the Cd-Zn-Te spectrometers, and measuring the absorption gamma rays from moderator material present in the environment. In both cases, the capture gamma rays can be imaged to help locate a shielded neutron source. In this work, we discuss the total neutron detection efficiency of the GammaTracker instrument, and we present measured images of shielded neutron sources. Prospects for gamma-ray rejection are discussed.
C1 [Seifert, Carolyn E.; Barnett, Debra S.; Myjak, Mitchell J.] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Seifert, CE (reprint author), Pacific NW Natl Lab, 902 Battelle Blvd, Richland, WA 99352 USA.
EM carolyn.seifert@pnl.gov
OI Myjak, Mitchell/0000-0002-3807-3542
NR 6
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 978-0-8194-7299-1
J9 P SOC PHOTO-OPT INS
PY 2008
VL 7079
AR 707907
DI 10.1117/12.798795
PG 9
WC Instruments & Instrumentation; Optics; Physics, Applied
SC Instruments & Instrumentation; Optics; Physics
GA BIY54
UT WOS:000263710100004
ER
PT S
AU Yang, G
Bolotnikov, AE
Camarda, GS
Cui, Y
Hossain, A
James, RB
AF Yang, G.
Bolotnikov, A. E.
Camarda, G. S.
Cui, Y.
Hossain, A.
James, R. B.
BE Burger, A
Franks, LA
James, RB
TI High Spatial Resolution X-Ray Mapping of CdZnTe detectors
SO HARD X-RAY, GAMMA-RAY, AND NEUTRON DETECTOR PHYSICS X
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
(SPIE)
LA English
DT Proceedings Paper
CT Conference on Hard X-Ray, Gamma-Ray, and Neutron Detector Physics X
CY AUG 11-13, 2008
CL San Diego, CA
DE Radiation detection; CdZnTe; X-ray mapping; defect
ID CRYSTALS
AB CdZnTe (CZT) is the most promising semiconductor for room-temperature nuclear radiation detectors. At Brookhaven's National Synchrotron Light Source (NSLS), we used a highly collimated synchrotron X-ray radiation to map different CZT detectors. In this paper, the latest results from high spatial resolution X-ray mapping of CZT detectors are reported. Effects of different internal defects on the performance of CZT detectors are discussed.
C1 [Yang, G.; Bolotnikov, A. E.; Camarda, G. S.; Cui, Y.; Hossain, A.; James, R. B.] Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Yang, G (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
EM gyang@bnl.gov
RI Yang, Ge/G-1354-2011
NR 7
TC 0
Z9 0
U1 1
U2 2
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7299-1
J9 P SOC PHOTO-OPT INS
PY 2008
VL 7079
AR 70791D
DI 10.1117/12.796595
PG 10
WC Instruments & Instrumentation; Optics; Physics, Applied
SC Instruments & Instrumentation; Optics; Physics
GA BIY54
UT WOS:000263710100035
ER
PT J
AU Canu, IG
Ellis, ED
Tirmarche, M
AF Canu, Irina Guseva
Ellis, Elizabeth Dupree
Tirmarche, Margot
TI Cancer risk in nuclear workers occupationally exposed to uranium -
Emphasis on internal exposure
SO HEALTH PHYSICS
LA English
DT Review
DE epidemiology; nuclear fuel cycle; radiation; alpha; health effects
ID ATOMIC-ENERGY-AUTHORITY; MATERIALS FABRICATION PLANT; CAUSE-SPECIFIC
MORTALITY; NATIONAL DOSE REGISTRY; ALKALINE COMET ASSAY; DIOXIDE UO2
DUST; IONIZING-RADIATION; NATURAL URANIUM; DRINKING-WATER; DNA-DAMAGE
AB Workers involved in the nuclear fuel cycle have a potential for internal exposure to uranium. The present review of epidemiological studies of these workers aims to elucidate the relationship between occupational internal uranium exposure and cancer risk. Eighteen cohort and 5 nested case-control studies published since 1980 are reviewed. Workers occupationally exposed to uranium appear to be at increased risk of mortality from neoplasms of the lung, larynx, and lymphatic and haematopoietic tissue. Currently available evidence for a positive association between internal exposure to uranium and the risk of cancer is limited. The common weaknesses in reviewed studies include low statistical power and inaccurate assessment of internal exposure to uranium. Further investigations should focus on precise assessment of occupational exposure and address the issue of potential confounders.
C1 [Canu, Irina Guseva; Tirmarche, Margot] Oak Ridge Associated Univ, Ctr Epidemiol Res, Oak Ridge, TN USA.
RP Canu, IG (reprint author), LEPID, DRPH, Inst Radioprotect & Surete Nucl, BP 17, F-92262 Fontenay Aux Roses, France.
EM irina.canu@irsn.fr
NR 75
TC 26
Z9 26
U1 1
U2 8
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0017-9078
EI 1538-5159
J9 HEALTH PHYS
JI Health Phys.
PD JAN
PY 2008
VL 94
IS 1
BP 1
EP 17
DI 10.1097/01.HP.0000281195.63082.e3
PG 17
WC Environmental Sciences; Public, Environmental & Occupational Health;
Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical
Imaging
SC Environmental Sciences & Ecology; Public, Environmental & Occupational
Health; Nuclear Science & Technology; Radiology, Nuclear Medicine &
Medical Imaging
GA 243HG
UT WOS:000251786800001
PM 18091147
ER
PT J
AU Goto, M
Rosson, R
Wampler, JM
Elliott, WC
Serkiz, S
Kahn, B
AF Goto, Momoko
Rosson, Robert
Wampler, J. Marion
Elliott, W. Crawford
Serkiz, Steven
Kahn, Bernd
TI Freundlich and dual langmuir isotherm models for predicting Cs-137
binding on Savannah River Site soils
SO HEALTH PHYSICS
LA English
DT Article
DE cesium; Cs-131; soil; modeling; environmental
ID CESIUM; SORPTION; ILLITE; RETENTION; CLAY
AB Distribution of Cs-137 and stable cesium between aqueous solution and near-surface soil samples from five locations at the Savannah River Site was measured in order to develop a predictive model for (CS)-C-137 uptake by the soils. Sorption of 137CS in these soils appears to be mostly by hydroxy-interlayered vermiculite. Batch sorption studies with 4 d for equilibration were conducted at three cesium concentrations and at two backing electrolyte (NaNO3) concentrations. The soil-solution mixtures were pH-adjusted to evaluate the effects of pH on cesium sorption. Sorbed cesium was related to the equilibrium aqueous cesium concentrations by a Freundlich isotherm model. Model fits on logarithmic scales have a common slope of 0.60 +/- 0.03 for acidic mixtures and 0.69 +/- 0.04 for neutralized mixtures but have unique intercepts that are influenced by backing electrolyte concentration and pH. An ion-exchange model is proposed that pertains to all five soils and relates the Freundlich isotherms to the cation exchange capacity of soil and the aqueous concentrations of cesium, sodium, and a third ionic species that was hydrogen in the acidic mixtures and potassium in the neutralized mixtures. Model fits are consistent with K, values in the entire range of 5-2,300 L kg(-1) determined for the five soil types. As an alternate model, dual Langmuir isotherms were fitted to the data. The results suggest cesium sorption by (1) relatively few interlayer-wedge sites, highly selective for cesium, and (2) much more abundant but less selective sites on internal and external planar surfaces.
C1 [Goto, Momoko] Georgia Inst Technol, George W Woodruff Sch Mech Engn, Nucl & Radiol Engn Program, Atlanta, GA 30332 USA.
[Goto, Momoko] Penn State Univ, Althouse Lab, University Pk, PA 16802 USA.
[Rosson, Robert; Kahn, Bernd] Georgia Inst Technol, Georgia Tech Res Inst, Environm Radiat Ctr, Atlanta, GA 30332 USA.
[Rosson, Robert; Kahn, Bernd] Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA.
[Wampler, J. Marion] Georgia State Univ, Dept Geosci, Atlanta, GA 30302 USA.
[Elliott, W. Crawford] Savannah River Natl Lab, Aiken, SC 29808 USA.
RP Kahn, B (reprint author), Georgia Inst Technol, Georgia Tech Res Inst, Electroopt Syst Lab, Environm Radiat Ctr, Atlanta, GA 30332 USA.
EM Bernd.Kahn@gtri.gatech.edu
NR 31
TC 9
Z9 9
U1 3
U2 15
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0017-9078
EI 1538-5159
J9 HEALTH PHYS
JI Health Phys.
PD JAN
PY 2008
VL 94
IS 1
BP 18
EP 32
DI 10.1097/01.HP.0000278416.04381.31
PG 15
WC Environmental Sciences; Public, Environmental & Occupational Health;
Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical
Imaging
SC Environmental Sciences & Ecology; Public, Environmental & Occupational
Health; Nuclear Science & Technology; Radiology, Nuclear Medicine &
Medical Imaging
GA 243HG
UT WOS:000251786800002
PM 18091148
ER
PT J
AU Olsher, RH
Seagraves, DT
AF Olsher, Richard H.
Seagraves, David T.
TI A He-3 counter version of the Thermo Fisher Scientific NRD neutron rem
meter
SO HEALTH PHYSICS
LA English
DT Article
DE detector; radiation; instrumentation; neutron detection; survey meter
AB Thermo Fisher Scientific's NRD rem meter has been in production for almost 40 y and is the primary rem meter in use at many U.S. Department of Energy facilities. An upgrade project was initiated at the Los Alamos National Laboratory with the primary goal of increasing the NRD's neutron sensitivity through the substitution of pressurized He-3 gas (4 atmospheres) for the stock counter tube's BF3 fill gas. Historically, BF3 counters were far less expensive relative to He-3 and were usually chosen on the basis of cost. That is no longer the case, with pricing for both types of counters being similar. Test results have shown that the He-3 counter version of the NRD exhibits stable operation at a reasonable bias voltage and good gamma rejection. Sensitivity has been increased by about a factor of four with no penalty in cost.
C1 [Olsher, Richard H.; Seagraves, David T.] Los Alamos Natl Lab, Hlth Phys Measurements Grp, Los Alamos, NM 87545 USA.
RP Olsher, RH (reprint author), Los Alamos Natl Lab, Hlth Phys Measurements Grp, Mail Stop J573,POB 1663, Los Alamos, NM 87545 USA.
EM dick@lanl.gov
NR 5
TC 1
Z9 1
U1 0
U2 0
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0017-9078
EI 1538-5159
J9 HEALTH PHYS
JI Health Phys.
PD JAN
PY 2008
VL 94
IS 1
BP 71
EP 74
DI 10.1097/01.HP.0000284890.33001.af
PG 4
WC Environmental Sciences; Public, Environmental & Occupational Health;
Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical
Imaging
SC Environmental Sciences & Ecology; Public, Environmental & Occupational
Health; Nuclear Science & Technology; Radiology, Nuclear Medicine &
Medical Imaging
GA 243HG
UT WOS:000251786800008
PM 18091154
ER
PT J
AU Munyon, WJ
Reilly, DW
Webb, J
AF Munyon, W. J.
Reilly, D. W.
Webb, J.
TI AGHCF gaseous-effluent tritium sampling system: Design considerations
and performance testing results
SO HEALTH PHYSICS
LA English
DT Article
DE tritium; air sampling; effluents; operational topics
AB Performance testing results involving the operation of a gaseous-effluent tritium sampling system are provided. A system description, including design improvements made over the course of several years of operation, is also presented. The sampling technique is based on using ethylene glycol bubblers for collecting tritiated water entrained as vapor in a nitrogen purge gas from a hot cell facility. Tritiated gas is converted to water vapor using a high temperature copper oxide bed; newly-formed water molecules are readily collected in a second set of ethylene glycol bubblers. For a single bubbler containing 20 mL of ethylene glycol, the tritium collection efficiency was determined to be 98.3%. To optimize performance and to minimize the volume of mixed waste generated, tests were performed to evaluate variations in the collection efficiency as a function of sorbent volume. For purposes of comparison the performance of water-filled bubblers was also evaluated. With two water bubblers connected in series the overall collection efficiency was quite satisfactory at 95.4%, although appreciable water losses were evident. The bed oxidation efficiency for tritiated gas was evaluated over a range of temperatures; at a catalyst bed temperature of 350 degrees C nearly all the gas was converted to water vapor. System memory effects were assessed by measuring the amount of residual contamination present in the bubblers after purging the sampling system for a week offline. Contamination problems arising from previous sampling periods were inconsequential. The overall uncertainty associated with the total quantity of tritium discharged to the environment based on the results of the performance testing was estimated to be +/- 24% at the 95% confidence level.
C1 [Munyon, W. J.; Reilly, D. W.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Webb, J.] US Nucl Regulatory Commiss, Rockville, MD 20852 USA.
RP Munyon, WJ (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM wjmunyon@ani.gov
NR 8
TC 0
Z9 0
U1 1
U2 4
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0017-9078
EI 1538-5159
J9 HEALTH PHYS
JI Health Phys.
PD JAN
PY 2008
VL 94
IS 1
BP 75
EP 85
DI 10.1097/01.HP.0000279630.18757.80
PG 11
WC Environmental Sciences; Public, Environmental & Occupational Health;
Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical
Imaging
SC Environmental Sciences & Ecology; Public, Environmental & Occupational
Health; Nuclear Science & Technology; Radiology, Nuclear Medicine &
Medical Imaging
GA 243HG
UT WOS:000251786800009
PM 18091155
ER
PT J
AU Woolbright, SA
DiFazio, SP
Yin, T
Martinsen, GD
Zhang, X
Allan, GJ
Whitham, TG
Keim, P
AF Woolbright, S. A.
DiFazio, S. P.
Yin, T.
Martinsen, G. D.
Zhang, X.
Allan, G. J.
Whitham, T. G.
Keim, P.
TI A dense linkage map of hybrid cottonwood (Populus fremontii x
P-angustifolia) contributes to long-term ecological research and
comparison mapping in a model forest tree
SO HEREDITY
LA English
DT Article
DE Populus; genetic mapping; comparison mapping; ecological genetics;
hybrid; AFLP
ID FRAGMENT LENGTH POLYMORPHISMS; QUANTITATIVE TRAIT LOCI;
MOLECULAR-GENETICS; SEGREGATION DISTORTION; ECOSYSTEM GENETICS;
LEAF-LITTER; PLANT; GENOME; AFLP; COMMUNITY
AB Cottonwoods are foundation riparian species, and hybridization among species is known to produce ecological effects at levels higher than the population, including effects on dependent species, communities and ecosystems. Because these patterns result from increased genetic variation in key cottonwood traits, novel applications of genetic tools (for example, QTL mapping) could be used to place broad-scale ecological research into a genomic perspective. In addition, linkage maps have been produced for numerous species within the genus, and, coupled with the recent publication of the Populus genome sequence, these maps present a unique opportunity for genome comparisons in a model system. Here, we conducted linkage analyses in order to (1) create a platform for QTL and candidate gene studies of ecologically important traits, (2) create a framework for chromosomal-scale perspectives of introgression in a natural population, and (3) enhance genome-wide comparisons using two previously unmapped species. We produced 246 backcross mapping (BC1) progeny by crossing a naturally occurring F-1 hybrid (Populus fremontii x P. angustifolia) to a pure P. angustifolia from the same population. Linkage analysis resulted in a dense linkage map of 541 AFLP and 111 SSR markers distributed across 19 linkage groups. These results compared favorably with other Populus linkage studies, and addition of SSR loci from the poplar genome project provided coarse alignment with the genome sequence. Preliminary applications of the data suggest that our map represents a useful framework for applying genomic research to ecological questions in a well-studied system, and has enhanced genome-wide comparisons in a model tree.
C1 [Woolbright, S. A.; Martinsen, G. D.; Allan, G. J.; Whitham, T. G.; Keim, P.] No Arizona Univ, Dept Biol Sci, Environm Genet & Genom Facil, Flagstaff, AZ 86011 USA.
[Woolbright, S. A.; Martinsen, G. D.; Allan, G. J.; Whitham, T. G.; Keim, P.] No Arizona Univ, Merriam Powell Ctr Environm Res, Flagstaff, AZ 86011 USA.
[DiFazio, S. P.] W Virginia Univ, Dept Biol, Morgantown, WV 26506 USA.
[Yin, T.] Oak Ridge Natl Lab, Oak Ridge, TN USA.
[Zhang, X.] Univ Tennessee, Dept Plant Sci, Knoxville, TN USA.
RP Woolbright, SA (reprint author), No Arizona Univ, Dept Biol Sci, Environm Genet & Genom Facil, Box 5640,S Beaver St, Flagstaff, AZ 86011 USA.
EM Scott.Woolbright@nau.edu
RI Keim, Paul/A-2269-2010; Woolbright, Scott/B-4354-2012
OI Woolbright, Scott/0000-0002-7886-1009
NR 56
TC 32
Z9 36
U1 0
U2 13
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 0018-067X
J9 HEREDITY
JI Heredity
PD JAN
PY 2008
VL 100
IS 1
BP 59
EP 70
DI 10.1038/sj.hdy.6801063
PG 12
WC Ecology; Evolutionary Biology; Genetics & Heredity
SC Environmental Sciences & Ecology; Evolutionary Biology; Genetics &
Heredity
GA 242LZ
UT WOS:000251727900010
PM 17895905
ER
PT J
AU Shablykin, OV
Gakh, AA
Brovarets, VS
Rusanov, EB
Drach, BS
AF Shablykin, Oleg V.
Gakh, Andrei A.
Brovarets, Vladimir S.
Rusanov, Eduard B.
Drach, Boris S.
TI A facile synthesis of new 1,2-dihydro-2
lambda(5)-[1,3]oxazolo[5,4-d][1,3,2]diazaphosphinine derivatives
starting from 2-benzoylamino-3,3-dichloroacrylonitrile
SO HETEROATOM CHEMISTRY
LA English
DT Article
ID AMINES; PHOSPHORYLATION; NITRILES
AB Easily accessible 2-benzoylamino-3,3dichloroacrylonitrile, when treated successively with primary amines, phosphorus pentachloride, sulfur dioxide, and various N- or S-nucleophiles, furnishes the corresponding derivatives of 1,2-dihydro-2 lambda(5)-[1,3]oxazolo[5,4-d][1,3,2]diazaphosphinine, a novel fused heterocycle. The structure of the compounds obtained is unequivocally confirmed by spectroscopic methods and X-ray diffraction analysis. (c) 2008 Wiley Periodicals, Inc.
C1 [Shablykin, Oleg V.; Brovarets, Vladimir S.; Drach, Boris S.] Natl Acad Sci Ukraine, Inst Bioorgan Chem & Petrochem, Kiev, Ukraine.
[Gakh, Andrei A.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Rusanov, Eduard B.] Natl Acad Sci Ukraine, Inst Organ Chem, Kiev, Ukraine.
RP Drach, BS (reprint author), Natl Acad Sci Ukraine, Inst Bioorgan Chem & Petrochem, Kiev, Ukraine.
EM drach@bpci.kiev.ua
NR 24
TC 2
Z9 2
U1 0
U2 1
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1042-7163
EI 1098-1071
J9 HETEROATOM CHEM
JI Heteroatom Chem.
PY 2008
VL 19
IS 5
BP 506
EP 511
DI 10.1002/hc.20470
PG 6
WC Chemistry, Multidisciplinary
SC Chemistry
GA 328GG
UT WOS:000257785800012
ER
PT B
AU Fraser, AM
AF Fraser, Andrew M.
BA Fraser, AM
BF Fraser, AM
TI Hidden Markov Models and Dynamical Systems Introduction
SO HIDDEN MARKOV MODELS AND DYNAMICAL SYSTEMS
SE Other Titles in Applied Mathematics
LA English
DT Editorial Material; Book Chapter
C1 Los Alamos Natl Lab, Los Alamos, NM USA.
RP Fraser, AM (reprint author), Los Alamos Natl Lab, Los Alamos, NM USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU SIAM
PI PHILADELPHIA
PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 USA
BN 978-0-898716-65-8
J9 OTHER TITL APPL MATH
PY 2008
VL 107
BP 1
EP 17
D2 10.1137/1.9780898717747
PG 17
WC Mathematics, Applied
SC Mathematics
GA BOL77
UT WOS:000276959600002
ER
PT B
AU Fraser, AM
AF Fraser, Andrew M.
BA Fraser, AM
BF Fraser, AM
TI Hidden Markov Models and Dynamical Systems Preface
SO HIDDEN MARKOV MODELS AND DYNAMICAL SYSTEMS
SE Other Titles in Applied Mathematics
LA English
DT Editorial Material; Book Chapter
ID PROBABILISTIC FUNCTIONS; LORENZ ATTRACTOR; EM ALGORITHM; TIME-SERIES;
CHAINS
C1 Los Alamos Natl Lab, Los Alamos, NM USA.
RP Fraser, AM (reprint author), Los Alamos Natl Lab, Los Alamos, NM USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU SIAM
PI PHILADELPHIA
PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 USA
BN 978-0-898716-65-8
J9 OTHER TITL APPL MATH
PY 2008
VL 107
BP XI
EP +
D2 10.1137/1.9780898717747
PG 7
WC Mathematics, Applied
SC Mathematics
GA BOL77
UT WOS:000276959600001
ER
PT B
AU Fraser, AM
AF Fraser, Andrew M.
BA Fraser, AM
BF Fraser, AM
TI Basic Algorithms
SO HIDDEN MARKOV MODELS AND DYNAMICAL SYSTEMS
SE Other Titles in Applied Mathematics
LA English
DT Article; Book Chapter
C1 Los Alamos Natl Lab, Los Alamos, NM USA.
RP Fraser, AM (reprint author), Los Alamos Natl Lab, Los Alamos, NM USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU SIAM
PI PHILADELPHIA
PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 USA
BN 978-0-898716-65-8
J9 OTHER TITL APPL MATH
PY 2008
VL 107
BP 19
EP 46
D2 10.1137/1.9780898717747
PG 28
WC Mathematics, Applied
SC Mathematics
GA BOL77
UT WOS:000276959600003
ER
PT B
AU Fraser, AM
AF Fraser, Andrew M.
BA Fraser, AM
BF Fraser, AM
TI Variants and Generalizations
SO HIDDEN MARKOV MODELS AND DYNAMICAL SYSTEMS
SE Other Titles in Applied Mathematics
LA English
DT Article; Book Chapter
C1 Los Alamos Natl Lab, Los Alamos, NM USA.
RP Fraser, AM (reprint author), Los Alamos Natl Lab, Los Alamos, NM USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU SIAM
PI PHILADELPHIA
PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 USA
BN 978-0-898716-65-8
J9 OTHER TITL APPL MATH
PY 2008
VL 107
BP 47
EP 57
D2 10.1137/1.9780898717747
PG 11
WC Mathematics, Applied
SC Mathematics
GA BOL77
UT WOS:000276959600004
ER
PT B
AU Fraser, AM
AF Fraser, Andrew M.
BA Fraser, AM
BF Fraser, AM
TI Continuous States and Observations and Kalman Filtering
SO HIDDEN MARKOV MODELS AND DYNAMICAL SYSTEMS
SE Other Titles in Applied Mathematics
LA English
DT Article; Book Chapter
C1 Los Alamos Natl Lab, Los Alamos, NM USA.
RP Fraser, AM (reprint author), Los Alamos Natl Lab, Los Alamos, NM USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU SIAM
PI PHILADELPHIA
PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 USA
BN 978-0-898716-65-8
J9 OTHER TITL APPL MATH
PY 2008
VL 107
BP 59
EP 72
D2 10.1137/1.9780898717747
PG 14
WC Mathematics, Applied
SC Mathematics
GA BOL77
UT WOS:000276959600005
ER
PT B
AU Fraser, AM
AF Fraser, Andrew M.
BA Fraser, AM
BF Fraser, AM
TI Performance Bounds and a Toy Problem
SO HIDDEN MARKOV MODELS AND DYNAMICAL SYSTEMS
SE Other Titles in Applied Mathematics
LA English
DT Article; Book Chapter
C1 Los Alamos Natl Lab, Los Alamos, NM USA.
RP Fraser, AM (reprint author), Los Alamos Natl Lab, Los Alamos, NM USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU SIAM
PI PHILADELPHIA
PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 USA
BN 978-0-898716-65-8
J9 OTHER TITL APPL MATH
PY 2008
VL 107
BP 73
EP 96
D2 10.1137/1.9780898717747
PG 24
WC Mathematics, Applied
SC Mathematics
GA BOL77
UT WOS:000276959600006
ER
PT B
AU Fraser, AM
AF Fraser, Andrew M.
BA Fraser, AM
BF Fraser, AM
TI Obstructive Sleep Apnea
SO HIDDEN MARKOV MODELS AND DYNAMICAL SYSTEMS
SE Other Titles in Applied Mathematics
LA English
DT Article; Book Chapter
C1 Los Alamos Natl Lab, Los Alamos, NM USA.
RP Fraser, AM (reprint author), Los Alamos Natl Lab, Los Alamos, NM USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU SIAM
PI PHILADELPHIA
PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 USA
BN 978-0-898716-65-8
J9 OTHER TITL APPL MATH
PY 2008
VL 107
BP 97
EP 116
D2 10.1137/1.9780898717747
PG 20
WC Mathematics, Applied
SC Mathematics
GA BOL77
UT WOS:000276959600007
ER
PT B
AU Fraser, AM
AF Fraser, Andrew M.
BA Fraser, AM
BF Fraser, AM
TI Formulas for Matrices and Gaussians
SO HIDDEN MARKOV MODELS AND DYNAMICAL SYSTEMS
SE Other Titles in Applied Mathematics
LA English
DT Article; Book Chapter
C1 Los Alamos Natl Lab, Los Alamos, NM USA.
RP Fraser, AM (reprint author), Los Alamos Natl Lab, Los Alamos, NM USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU SIAM
PI PHILADELPHIA
PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 USA
BN 978-0-898716-65-8
J9 OTHER TITL APPL MATH
PY 2008
VL 107
BP 117
EP 120
D2 10.1137/1.9780898717747
PG 4
WC Mathematics, Applied
SC Mathematics
GA BOL77
UT WOS:000276959600008
ER
PT S
AU Wu, SSQ
Soules, TF
Page, RH
Mitchell, SC
Kanz, VK
Beach, RJ
AF Wu, Sheldon S. Q.
Soules, Thomas F.
Page, Ralph H.
Mitchell, Scott C.
Kanz, V. Keith
Beach, Raymond J.
BE Davis, SJ
Heaven, MC
Schriempf, JT
TI Hydrocarbon-free resonance transition 795-nm rubidium laser - art. no.
68740E
SO HIGH ENERGY/AVERAGE POWER LASERS AND INTENSE BEAM APPLICATIONS II
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
(SPIE)
LA English
DT Proceedings Paper
CT Conference on High Energy/Average Power Lasers and Intense Beam
Applications II
CY JAN 21-22, 2008
CL San Jose, CA
SP SPIE
DE rubidium laser; diode pumped alkali laser; DPAL
ID VAPOR
AB An optical resonance transition rubidium laser (5(2)P(1/2) -> 5(2)S(1/2)) is demonstrated with a hydrocarbon-free buffer gas. Prior demonstrations of alkali resonance transition lasers have used ethane as either the buffer gas or a buffer gas component to promote rapid fine-structure mixing. However, our experience suggests that the alkali vapor reacts with the ethane producing carbon as one of the reaction products. This degrades long term laser reliability. Our recent experimental results with a "clean" helium-only buffer gas system pumped by a Ti:sapphire laser demonstrate all the advantages of the original alkali laser system, but without the reliability issues associated with the use of ethane.
C1 [Wu, Sheldon S. Q.; Soules, Thomas F.; Page, Ralph H.; Mitchell, Scott C.; Kanz, V. Keith; Beach, Raymond J.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Wu, SSQ (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave, Livermore, CA 94551 USA.
NR 11
TC 0
Z9 0
U1 0
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 978-0-8194-7049-2
J9 P SOC PHOTO-OPT INS
PY 2008
VL 6874
BP E8740
EP E8740
DI 10.1117/12.765592
PG 7
WC Optics; Physics, Applied
SC Optics; Physics
GA BHQ79
UT WOS:000255548300010
ER
PT S
AU Diehl, HT
Angstadt, R
Campa, J
Cease, H
Derylo, G
Emes, JH
Estrada, J
Kubik, D
Flaugher, BL
Holland, SE
Jonas, M
Kolbe, WF
Krider, J
Kuhlmann, S
Kuk, K
Maiorino, M
Palaio, N
Plazas, A
Roe, NA
Scarpine, V
Schultz, K
Shaw, T
Spinka, H
Stuermer, W
AF Diehl, H. Thomas
Angstadt, Robert
Campa, Julia
Cease, Herman
Derylo, Greg
Emes, John H.
Estrada, Juan
Kubik, Donna
Flaugher, Brenna L.
Holland, Steve E.
Jonas, Michelle
Kolbe, William F.
Krider, John
Kuhlmann, S.
Kuk, Kevin
Maiorino, Marino
Palaio, Nick
Plazas, Andres
Roe, Natalie A.
Scarpine, Vic
Schultz, Ken
Shaw, Terri
Spinka, Hal
Stuermer, Walter
BE Dorn, DA
Holland, AD
TI Characterization of DECam Focal Plane Detectors
SO HIGH ENERGY, OPTICAL, AND INFRARED DETECTORS FOR ASTRONOMY III
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
(SPIE)
LA English
DT Proceedings Paper
CT Conference on High Energy, Optical, and Infrared Detectors for Astronomy
III
CY JUN 23-26, 2008
CL Marseille, FRANCE
SP SPIE, SPIE Europe
DE CCDs; Mosaic camera; Dark Energy Survey
ID CCDS
AB DECam is a 520 Mpix, 3 square-deg FOV imager being built for the Blanco 4m Telescope at CTIO. This facility instrument will be used for the "Dark Energy Survey" of the southern galactic cap. DECam has chosen 250 mu m thick CCDs, developed at LBNL, with good QE in the near IR for the focal plane. In this work we present the characterization of these detectors done by the DES team, and compare it to the DECam technical requirements. The results demonstrate that the detectors satisfy the needs for instrument.
C1 [Diehl, H. Thomas; Angstadt, Robert; Cease, Herman; Derylo, Greg; Estrada, Juan; Kubik, Donna; Flaugher, Brenna L.; Jonas, Michelle; Krider, John; Kuk, Kevin; Scarpine, Vic; Schultz, Ken; Shaw, Terri; Stuermer, Walter] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
RP Diehl, HT (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA.
EM Diehl@FNAL.GOV
RI Roe, Natalie/A-8798-2012; Holland, Stephen/H-7890-2013
NR 13
TC 6
Z9 6
U1 0
U2 3
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7231-1
J9 P SOC PHOTO-OPT INS
PY 2008
VL 7021
AR 702107
DI 10.1117/12.790053
PG 11
WC Astronomy & Astrophysics; Instruments & Instrumentation; Optics
SC Astronomy & Astrophysics; Instruments & Instrumentation; Optics
GA BIR72
UT WOS:000262360300007
ER
PT S
AU O'Connor, P
Frank, J
Geary, JC
Gilmore, DK
Kotov, I
Radeka, V
Takacs, P
Tyson, JA
AF O'Connor, P.
Frank, J.
Geary, J. C.
Gilmore, D. K.
Kotov, I.
Radeka, V.
Takacs, P.
Tyson, J. A.
BE Dorn, DA
Holland, AD
TI Characterization of prototype LSST CCDs
SO High Energy, Optical, and Infrared Detectors for Astronomy III
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
(SPIE)
LA English
DT Proceedings Paper
CT Conference on High Energy, Optical, and Infrared Detectors for Astronomy
III
CY JUN 23-26, 2008
CL Marseille, FRANCE
SP SPIE, SPIE Europe
DE CCD; LSST; quantum efficiency; point spread function
ID CHARGE DIFFUSION; ELECTRIC-FIELD; SILICON; TELESCOPE; THICK
AB We present characterization methods and results on a number of new devices produced specifically to address LSST's performance goals, including flatness, QE, PSF, dark current, read noise, CTE, cosmetics, and crosstalk. The results indicate that commercially produced, thick n-channel over-depleted CCDs with excellent red response can achieve tight PSF at moderate applied substrate bias with no evidence of persistent image artifacts. We will also report ongoing studies of mosaic assembly techniques to achieve chip-to-chip co-planarity, high fill factor, and thermal stability.
C1 [O'Connor, P.; Frank, J.; Kotov, I.; Radeka, V.; Takacs, P.] Brookhaven Natl Lab, Upton, NY 11973 USA.
RP O'Connor, P (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
EM poc@bnl.gov
NR 15
TC 10
Z9 10
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 978-0-8194-7231-1
J9 P SOC PHOTO-OPT INS
PY 2008
VL 7021
AR 702106
DI 10.1117/12.790672
PG 12
WC Astronomy & Astrophysics; Instruments & Instrumentation; Optics
SC Astronomy & Astrophysics; Instruments & Instrumentation; Optics
GA BIR72
UT WOS:000262360300006
ER
PT S
AU Degroot, T
Ferencz, R
Havstad, M
Hodge, N
Lin, J
Parsons, D
Puso, M
Solberg, J
Zywicz, E
AF Degroot, Tony
Ferencz, Robert
Havstad, Mark
Hodge, Neil
Lin, Jerry
Parsons, Dennis
Puso, Michael
Solberg, Jerome
Zywicz, Edward
BE Palma, JMLM
Amestoy, PR
Dayde, M
Mattoso, M
Lopes, JC
TI Accomplishments and Challenges in Code Development for Parallel and
Multimechanics Simulations
SO HIGH PERFORMANCE COMPUTING FOR COMPUTATIONAL SCIENCE - VECPAR 2008
SE Lecture Notes in Computer Science
LA English
DT Proceedings Paper
CT 8th International Conference on High Performance Computing for
Computational Science (VECPAR 2008)
CY JUN 24-27, 2008
CL Toulouse, FRANCE
SP AESE, European Ctr Res & Adv Training, Inst Natl Polytech, Univ Porto, Univ Paul Sabatier
ID CONTACT METHOD
AB The Methods Development Group at Lawrence Livermore National Laboratory has historically developed and supported software for engineering simulations, with a focus on nonlinear structural mechanics and heat transfer. The quality, quantity and complexity of engineering analyses have continued to increase over time as advances in chip speed and multiprocessing computers have empowered this simulation software. As such, the evolution of simulation software has seen a greater focus on multimechanics and the incorporation of more sophisticated algorithms to improve accuracy, robustness and usability. This paper will give an overview of the latest code technologies developed by the Methods Development group in the areas of large deformation transient analysis and implicit coupled codes. Applications were run on the state of the art hardware available at the national laboratories.
C1 [Degroot, Tony; Ferencz, Robert; Havstad, Mark; Hodge, Neil; Lin, Jerry; Parsons, Dennis; Puso, Michael; Solberg, Jerome; Zywicz, Edward] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Degroot, T (reprint author), Lawrence Livermore Natl Lab, 8000 East Ave, Livermore, CA 94550 USA.
NR 5
TC 0
Z9 0
U1 0
U2 2
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0302-9743
BN 978-3-540-92858-4
J9 LECT NOTES COMPUT SC
PY 2008
VL 5336
BP 214
EP 227
PG 14
WC Computer Science, Interdisciplinary Applications; Computer Science,
Theory & Methods
SC Computer Science
GA BIY42
UT WOS:000263689900019
ER
PT S
AU Canning, A
AF Canning, Andrew
BE Palma, JMLM
Amestoy, PR
Dayde, M
Mattoso, M
Lopes, JC
TI Scalable Parallel 3d FFTs for Electronic Structure Codes
SO HIGH PERFORMANCE COMPUTING FOR COMPUTATIONAL SCIENCE - VECPAR 2008
SE Lecture Notes in Computer Science
LA English
DT Proceedings Paper
CT 8th International Conference on High Performance Computing for
Computational Science (VECPAR 2008)
CY JUN 24-27, 2008
CL Toulouse, FRANCE
SP AESE, European Ctr Res & Adv Training, Inst Natl Polytech, Univ Porto, Univ Paul Sabatier
ID MINIMIZATION
AB First-principles methods based on Density Functional Theory (DFT) where the wavefunctions are expanded in plane waves (Fourier components) are the most widely used approach for electronic structure calculations in materials science. The scaling of this method depends critically on having an efficient parallel 3d FFT that minimizes communications and calculations. We present an implementation and performance data of a parallel 3d FFT specifically designed for electronic structure calculations that scales to thousands of processors on leading parallel and vector computer platforms (IBM SP, Cray XT, NEC SX).
C1 Lawrence Berkeley Natl Lab, CRD, Berkeley, CA 94720 USA.
RP Canning, A (reprint author), Lawrence Berkeley Natl Lab, CRD, Berkeley, CA 94720 USA.
NR 4
TC 3
Z9 3
U1 0
U2 1
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0302-9743
BN 978-3-540-92858-4
J9 LECT NOTES COMPUT SC
PY 2008
VL 5336
BP 280
EP 286
PG 7
WC Computer Science, Interdisciplinary Applications; Computer Science,
Theory & Methods
SC Computer Science
GA BIY42
UT WOS:000263689900024
ER
PT S
AU Li, XS
AF Li, Xiaoye S.
BE Palma, JMLM
Amestoy, PR
Dayde, M
Mattoso, M
Lopes, JC
TI Evaluation of Sparse LU Factorization and Triangular Solution on
Multicore Platforms
SO HIGH PERFORMANCE COMPUTING FOR COMPUTATIONAL SCIENCE - VECPAR 2008
SE Lecture Notes in Computer Science
LA English
DT Proceedings Paper
CT 8th International Conference on High Performance Computing for
Computational Science (VECPAR 2008)
CY JUN 24-27, 2008
CL Toulouse, FRANCE
SP AESE, European Ctr Res & Adv Training, Inst Natl Polytech, Univ Porto, Univ Paul Sabatier
ID ALGORITHMS; SUPERLU
AB The Chip Multiprocessor (CMP) will be the basic building block for computer systems ranging from laptops to supercomputers. New software developments at all levels are needed to fully utilize these systems. In this work, we evaluate performance of different high-performance sparse LU factorization and triangular solution algorithms on several representative multicore machines. We include both pthreads and MPI implementations in this study, and found that the pthreads implementation consistently delivers good performance and a left-looking algorithm is usually superior.
C1 Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP Li, XS (reprint author), Lawrence Berkeley Natl Lab, MS 50F-1650,1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM xsli@lbl.gov
NR 14
TC 1
Z9 1
U1 0
U2 0
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0302-9743
BN 978-3-540-92858-4
J9 LECT NOTES COMPUT SC
PY 2008
VL 5336
BP 287
EP 300
PG 14
WC Computer Science, Interdisciplinary Applications; Computer Science,
Theory & Methods
SC Computer Science
GA BIY42
UT WOS:000263689900025
ER
PT S
AU Vasconcelos, PB
Marques, O
Roman, JE
AF Vasconcelos, Paulo B.
Marques, Osni
Roman, Jose E.
BE Palma, JMLM
Amestoy, PR
Dayde, M
Mattoso, M
Lopes, JC
TI Parallel Eigensolvers for a Discretized Radiative Transfer Problem
SO HIGH PERFORMANCE COMPUTING FOR COMPUTATIONAL SCIENCE - VECPAR 2008
SE Lecture Notes in Computer Science
LA English
DT Proceedings Paper
CT 8th International Conference on High Performance Computing for
Computational Science (VECPAR 2008)
CY JUN 24-27, 2008
CL Toulouse, FRANCE
SP AESE, European Ctr Res & Adv Training, Inst Natl Polytech, Univ Porto, Univ Paul Sabatier
DE High performance computing; eigenvalue computations; Fredholm integral
equation; weakly singular kernel
ID EIGENVALUE; SOLVERS
AB In this work we consider the numerical computation of eigenpairs of a matrix derived from integral operators. The matrix is associated to a radiative transfer problem in stellar atmospheres that is formulated by means of a weakly singular Fredholm integral equation defined on a Banach space. We examine direct and iterative parallel strategies for the eigensolution phase, using state-of-the-art numerical methods implemented in publicly available software packages.
C1 [Vasconcelos, Paulo B.] Univ Porto, Fac Econ, Rua Dr Roberto Frias S-N, P-4200464 Oporto, Portugal.
[Marques, Osni] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Roman, Jose E.] Univ Politecn Valencia, Inst ITACA, E-46022 Valencia, Spain.
RP Vasconcelos, PB (reprint author), Univ Porto, Fac Econ, Rua Dr Roberto Frias S-N, P-4200464 Oporto, Portugal.
EM pjv@fep.up.pt; omarques@lbl.gov; jroman@dsic.upv.es
RI Vasconcelos, Paulo/A-8772-2008;
OI Vasconcelos, Paulo/0000-0002-7132-880X; Roman, Jose
E./0000-0003-1144-6772
FU Portuguese and Spanish governments [E-41/07, HP2006-0004]; Office of
Science; U.S. Department of Energy [DE-AC02-05CH11231]
FX This work was partially supported by the Portuguese and Spanish
governments via an Integrated Action (resp. ref. E-41/07 and ref.
HP2006-0004), and partly by the Director, Office of Science, Advanced
Scientific Computing Research Program, of the U.S. Department of Energy
under contract No. DE-AC02-05CH11231.
NR 15
TC 3
Z9 3
U1 0
U2 1
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0302-9743
BN 978-3-540-92858-4
J9 LECT NOTES COMPUT SC
PY 2008
VL 5336
BP 336
EP +
PG 2
WC Computer Science, Interdisciplinary Applications; Computer Science,
Theory & Methods
SC Computer Science
GA BIY42
UT WOS:000263689900029
ER
PT S
AU Kaushik, D
Gropp, W
Minkoff, M
Smith, B
AF Kaushik, Dinesh
Gropp, William
Minkoff, Michael
Smith, Barry
BE Sadayappan, P
Parashar, M
Badrinath, R
Prasanna, VK
TI Improving the Performance of Tensor Matrix Vector Multiplication in
Cumulative Reaction Probability Based Quantum Chemistry Codes
SO HIGH PERFORMANCE COMPUTING - HIPC 2008, PROCEEDINGS
SE Lecture Notes in Computer Science
LA English
DT Proceedings Paper
CT 15th International Conference on High Performance Computing (HiPC 2008)
CY DEC 17-20, 2008
CL Bangalore, INDIA
SP IEEE Comp Soc, ACM SIGARCH, Infosys, DELL, NetApp, Intel, HP, IBM, Yahoo, Cray, Mellanox
AB Cumulative reaction probability (CRP) calculations provide a viable computational approach to estimate reaction rate coefficients. However, in order to give meaningful results these calculations should be done in many dimensions (ten to fifteen). This makes CRP codes memory intensive. For this reason, these codes use iterative methods to solve the linear systems, where a good fraction of the execution time is spent on matrix-vector multiplication. In this paper, we discuss the tensor product form of applying the system operator on a vector. This approach shows much better performance and provides huge savings in memory as compared to the explicit sparse representation of the system matrix.
C1 [Kaushik, Dinesh; Minkoff, Michael; Smith, Barry] Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
[Gropp, William] Univ Illinois, Urbana, IL 61801 USA.
RP Kaushik, D (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM kaushik@mcs.anl.gov; wgropp@uiuc.edu; minkoff@mcs.anl.gov;
bsmith@mcs.anl.gov
OI Gropp, William/0000-0003-2905-3029
FU DOE through Argonne NERSC; ORNL; NSF
FX We thank Paul Fischer, Ron Shepard, and Al Wagner of Argonne National
Laboratory for many helpful discussions. The computer time was supplied
by DOE (through Argonne, NERSC, and ORNL) and NSF (through Teragrid at
SDSC).
NR 11
TC 2
Z9 2
U1 0
U2 1
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0302-9743
BN 978-3-540-89893-1
J9 LECT NOTES COMPUT SC
PY 2008
VL 5374
BP 120
EP +
PG 3
WC Computer Science, Hardware & Architecture; Computer Science, Theory &
Methods
SC Computer Science
GA BIT30
UT WOS:000262503000014
ER
PT S
AU Alam, SR
Agarwal, PK
Hampton, SS
Ong, H
AF Alam, Sadaf R.
Agarwal, Pratul K.
Hampton, Scott S.
Ong, Hong
BE Sadayappan, P
Parashar, M
Badrinath, R
Prasanna, VK
TI Experimental Evaluation of Molecular Dynamics Simulations on Multi-core
Systems
SO High Performance Computing - HiPC 2008, Proceedings
SE Lecture Notes in Computer Science
LA English
DT Proceedings Paper
CT 15th International Conference on High Performance Computing (HiPC 2008)
CY DEC 17-20, 2008
CL Bangalore, INDIA
SP IEEE Comp Soc, ACM SIGARCH, Infosys, DELL, NetApp, Intel, HP, IBM, Yahoo, Cray & Mellanox
DE Multicore; Performance; Molecular Dynamics Simulation; HPC
AB Multi-core processors introduce many challenges both at the system and application levels that need to be addressed in order to attain the best performance. In this paper, we study the impact of the multi-core technologies in the context of two scalable, production-level molecular dynamics simulation frameworks. Experimental analysis and observations in this paper provide for a better understanding of the interactions between the application and the underlying system features such as memory bandwidth, architectural optimization. and communication library implementation. In particular, we observe that parallel efficiencies could be as low as 50% on quad-core systems while a set of dual-core processors connected with a high speed interconnect can easily outperform the same number of cores on a socket or in a package. This indicates that certain modifications to the software stack and application implementations are necessary in order to fully exploit the performance of multi-core based systems.
C1 [Alam, Sadaf R.; Agarwal, Pratul K.; Hampton, Scott S.; Ong, Hong] Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN USA.
RP Alam, SR (reprint author), Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN USA.
EM alamsr@ornl.gov; garwalpk@ornl.gov; hamptonss@ornl.gov; hongong@ornl.gov
NR 12
TC 6
Z9 6
U1 0
U2 6
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0302-9743
BN 978-3-540-89893-1
J9 LECT NOTES COMPUT SC
PY 2008
VL 5374
BP 131
EP 141
DI 10.1007/978-3-540-89894-8_15
PG 11
WC Computer Science, Hardware & Architecture; Computer Science, Theory &
Methods
SC Computer Science
GA BIT30
UT WOS:000262503000015
ER
PT S
AU Chan, A
Balaji, P
Gropp, W
Thakur, R
AF Chan, Anthony
Balaji, Pavan
Gropp, William
Thakur, Rajeev
BE Sadayappan, P
Parashar, M
Badrinath, R
Prasanna, VK
TI Communication Analysis of Parallel 3D FFT for Flat Cartesian Meshes on
Large Blue Gene Systems
SO HIGH PERFORMANCE COMPUTING - HIPC 2008, PROCEEDINGS
SE Lecture Notes in Computer Science
LA English
DT Proceedings Paper
CT 15th International Conference on High Performance Computing (HiPC 2008)
CY DEC 17-20, 2008
CL Bangalore, INDIA
SP IEEE Comp Soc, ACM SIGARCH, Infosys, DELL, NetApp, Intel, HP, IBM, Yahoo, Cray, Mellanox
ID IMPLEMENTATION
AB Parallel 3D FFT is a commonly used numerical method in scientific computing P3DFFT is a recently proposed implementation of parallel 3D FFT that is designed to allow sclability to massively large systems such as Blue Gene. While there has been recent work that demonstrates such sclability on regular cartesian meshes (equal length in each dimension), its performance and scalability for flat cartesian meshes (much smaller length in one dimension) is still a concern. In this, paper, we perform studies on a 16-rack (16384-node) Blue Gene/L system that demonstrates that a combination of the network topology and the communication pattern of P3DFFT can result in early network saturation and consequently performance loss. We also show that remapping processes on nodes and rotating the mesh by taking the communication properties of P3DFFT into consideration, can help alleviate this problem and improve performance by up to 48% in some special cases.
C1 [Chan, Anthony] Univ Chicago, ASCI FLASH Ctr, Chicago, IL 60637 USA.
[Balaji, Pavan; Thakur, Rajeev] Argonne Natl Lab, Div Math & Comp Sci, Argonne, IL 60439 USA.
[Gropp, William] Univ Illinois, Dept Comp Sci, Chicago, IL 60680 USA.
RP Chan, A (reprint author), Univ Chicago, ASCI FLASH Ctr, Chicago, IL 60637 USA.
EM chan@mcs.anl.gov; balaji@mcs.anl.gov; wgropp@illinois.edu;
thakur@mcs.anl.gov
OI Gropp, William/0000-0003-2905-3029
FU Computational Sciences Division sub program of the Office of Advanced
Scientific Computing Research; U.S. Department of Energy
[DE-AC02-06CH11357]
FX This work was supported by the Mathematical, Information, and
Computational Sciences Division sub program of the Office of Advanced
Scientific Computing Research, Office of Science, U.S. Department of
Energy, under Contract DE-AC02-06CH11357. We also acknowledge IBM for
allowing us to use their BG-Watson system for our experiments. Finally,
we thank Joerg Schumacher for providing us his test code that allowed us
to understand the scalability issues with P3DFFT on flat cartesian
meshes
NR 12
TC 3
Z9 3
U1 0
U2 0
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0302-9743
BN 978-3-540-89893-1
J9 LECT NOTES COMPUT SC
PY 2008
VL 5374
BP 350
EP +
PG 3
WC Computer Science, Hardware & Architecture; Computer Science, Theory &
Methods
SC Computer Science
GA BIT30
UT WOS:000262503000032
ER
PT S
AU Balaji, P
Bhagvat, S
Thakur, R
Panda, DK
AF Balaji, Pavan
Bhagvat, Sitha
Thakur, Rajeev
Panda, Dhabaleswar K.
BE Sadayappan, P
Parashar, M
Badrinath, R
Prasanna, VK
TI Sockets Direct Protocol for Hybrid Network Stacks: A Case Study with
iWARP over 10G Ethernet
SO HIGH PERFORMANCE COMPUTING - HIPC 2008, PROCEEDINGS
SE Lecture Notes in Computer Science
LA English
DT Proceedings Paper
CT 15th International Conference on High Performance Computing (HiPC 2008)
CY DEC 17-20, 2008
CL Bangalore, INDIA
SP IEEE Comp Soc, ACM SIGARCH, Infosys, DELL, NetApp, Intel, HP, IBM, Yahoo, Cray, Mellanox
AB As high-end computing systems continue to growl the need a for advanced networking capabilities, such as hot-spot avoidance and fault tolerance, is becoming important. While the traditional approach of utilizing intelligent network hardware has worked well to achieve high performance, adding more and more features makes the hardware complex and expensive. Consequently, protocol stacks such as iWARP and MX for 10-Gigabit Ethernet and QLogic InfiniBand, utilize hybrid designs that take. advantage of the processing power of multi-core processors together with network hardware accelerators. However, upper-layer stacks on these networks, such as the Sockets Direct. Protocol (SDP), have not kept, pace with such shift, in paradigm. and have continued W assume complete hardware offload, leading to redundant features and performance loss. fit this paper, we propose an enhanced design for SDP that, allows network stacks to specify components implemented in hardware and software, and uses, this information to optimize its execution.
C1 [Balaji, Pavan; Thakur, Rajeev] Argonne Natl Lab, Math & Comp Sci, Argonne, IL 60439 USA.
[Bhagvat, Sitha] Dell Inc, Scalable Syst Grp, Round Rock, TX USA.
[Panda, Dhabaleswar K.] Ohio State Univ, Comp Sci & Engn, Columbus, OH 43210 USA.
RP Balaji, P (reprint author), Argonne Natl Lab, Math & Comp Sci, Argonne, IL 60439 USA.
EM balaji@mcs.anl.gov; sitha_bhagvat@dell.com; thakur@mcs.anl.gov;
panda@cse.ohio-state.edu
FU National Science Foundation [0702182]; Mathematical, Information, and
Computational Sciences Division subprogram of the Office of Advanced
Scientific Computing Research, Office of Science, U.S. Department of
Energy [DE-AC02-06CH11357]
FX This work was supported in part by the National Science Foundation Grant
#0702182 and the Mathematical, Information, and Computational Sciences
Division subprogram of the Office of Advanced Scientific Computing
Research, Office of Science, U.S. Department of Energy, under Contract
DE-AC02-06CH11357.
NR 25
TC 0
Z9 0
U1 0
U2 0
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0302-9743
BN 978-3-540-89893-1
J9 LECT NOTES COMPUT SC
PY 2008
VL 5374
BP 478
EP +
PG 4
WC Computer Science, Hardware & Architecture; Computer Science, Theory &
Methods
SC Computer Science
GA BIT30
UT WOS:000262503000042
ER
PT S
AU Kumar, M
Chaube, V
Balaji, P
Feng, WC
Jin, HW
AF Kumar, Mithilesh
Chaube, Vineeta
Balaji, Pavan
Feng, Wu-Chun
Jin, Hyun-Wook
BE Sadayappan, P
Parashar, M
Badrinath, R
Prasanna, VK
TI Making a Case for Proactive Flow Control in Optical Circuit-Switched
Networks
SO HIGH PERFORMANCE COMPUTING - HIPC 2008, PROCEEDINGS
SE Lecture Notes in Computer Science
LA English
DT Proceedings Paper
CT 15th International Conference on High Performance Computing (HiPC 2008)
CY DEC 17-20, 2008
CL Bangalore, INDIA
SP IEEE Comp Soc, ACM SIGARCH, Infosys, DELL, NetApp, Intel, HP, IBM, Yahoo, Cray, Mellanox
DE rate-based protocol; circuit switched; optical networks; LambdaGrid
AB Optical circuit-switched networks such as National LambdaRail (NLR) offer dedicated bandwidth to support large-scale bulk data transfer. Though a dedicated circuit-switched network eliminates congestion from the network itself, it effectively "pushes" the congestion to the end hosts, resulting in lower-than-expected throughput. Previous approaches either use an ad-hoc proactive approach that does not generalize well or a sluggish reactive approach where the sending rate is only adapted based on synchronous feedback from the receiver.
We address the shortcomings of such approaches using a two-step process. First, we improve the adaptivity of the reactive approach by proposing an asynchronous, fine-grained, rate based approach. While this approach enhances performance, its limitation is that it is still reactive. Consequently, we then analyze the predictive patterns of load on the receiver and provide strong evidence that a proactive approach is not only possible, but also necessary, to achieve the best performance in dynamically varying end-host conditions.
C1 [Kumar, Mithilesh; Chaube, Vineeta; Feng, Wu-Chun] Virginia Tech, Dept Comp Sci, Blacksburg, VA 24061 USA.
[Balaji, Pavan] Argonne Natl Lab, Div Math & Comp Sci, Argonne, IL 60439 USA.
[Jin, Hyun-Wook] Konkuk Univ, Dept Comp Sci & Engn, Seoul, South Korea.
RP Kumar, M (reprint author), Virginia Tech, Dept Comp Sci, Blacksburg, VA 24061 USA.
EM mithil@cs.vt.edu; vineetac@cs.vt.edu; balaji@cs.anl.gov; feng@cs.vt.edu;
jinh@konkuk.ac.kr
NR 16
TC 0
Z9 0
U1 0
U2 0
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0302-9743
BN 978-3-540-89893-1
J9 LECT NOTES COMPUT SC
PY 2008
VL 5374
BP 491
EP +
PG 3
WC Computer Science, Hardware & Architecture; Computer Science, Theory &
Methods
SC Computer Science
GA BIT30
UT WOS:000262503000043
ER
PT S
AU Lindenberg, AM
Engemann, S
Gaffney, KJ
Sokolowski-Tinten, K
Larsson, J
Reis, D
Lorazo, P
Hastings, JB
AF Lindenberg, A. M.
Engemann, S.
Gaffney, K. J.
Sokolowski-Tinten, K.
Larsson, J.
Reis, D.
Lorazo, P.
Hastings, J. B.
BE Phipps, CR
TI Femtosecond x-ray diffuse scattering measurements of semiconductor
ablation dynamics
SO HIGH-POWER LASER ABLATION VII, PTS 1-2
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on High-Power Laser Ablation VII
CY APR 20-27, 2008
CL Taos, NM
SP SPIE, Photon Associates, LLC, European Off Aerosp Res & Dev (United Kingdom)
DE femtosecond; x-ray diffraction; ablation
ID TRANSIENT MOLECULAR-STRUCTURES; ELECTRON-DIFFRACTION
AB Femtosecond time-resolved small and wide-angle x-ray diffuse scattering techniques are applied to investigate the ultrafast nucleation processes that occur during the ablation process in semiconducting materials. Following intense optical excitation, a transient liquid state of high compressibility characterized by large-amplitude density fluctuations is observed and the build-up of these fluctuations is measured in real-time. Small-angle scattering measurements reveal the first steps in the nucleation of nanoscale voids below the surface of the semiconductor and support MD simulations of the ablation process.
C1 [Lindenberg, A. M.; Engemann, S.; Gaffney, K. J.; Hastings, J. B.] Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA.
RP Lindenberg, AM (reprint author), Stanford Linear Accelerator Ctr, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA.
NR 24
TC 0
Z9 0
U1 0
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 978-0-8194-7206-9
J9 PROC SPIE
PY 2008
VL 7005
AR 700504
DI 10.1117/12.784094
PN 1-2
PG 8
WC Optics; Physics, Applied
SC Optics; Physics
GA BIE38
UT WOS:000258905800002
ER
PT S
AU Luo, SN
Greenfield, SR
Paisley, DL
Johnson, RP
Shimada, T
Byler, DD
Loomis, EN
DiGiacomo, SN
Patterson, BM
McClellan, KJ
Dickerson, RM
Peralta, PD
Koskelo, AC
Tonks, DL
AF Luo, S. N.
Greenfield, S. R.
Paisley, D. L.
Johnson, R. P.
Shimada, T.
Byler, D. D.
Loomis, E. N.
DiGiacomo, S. N.
Patterson, B. M.
McClellan, K. J.
Dickerson, R. M.
Peralta, P. D.
Koskelo, A. C.
Tonks, D. L.
BE Phipps, CR
TI Long pulse laser driven shock wave loading for dynamic materials
experiments
SO HIGH-POWER LASER ABLATION VII, PTS 1-2
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on High-Power Laser Ablation VII
CY APR 20-27, 2008
CL Taos, NM
SP SPIE, Photon Associates, LLC, European Off Aerosp Res & Dev (United Kingdom)
DE long pulse laser; shock waves; flyer plate; confined ablation;
planarity; off-Hugoniot; quasi-isentropic
ID INTERFEROMETER; VELOCITIES; SURFACE; METALS; SYSTEM
AB We present two laser driven shock wave loading techniques utilizing long pulse lasers, laser-launched flyer plate and confined laser ablation, and their applications to shock physics. The full width at half maximum of the drive laser pulse ranges from 100 us to 10 mu s, and its energy, from 10 J to 1000 J. The drive pulse is smoothed with a. holographic optical element to achieve spatial homogeneity in loading. We characterize the flyer plate during flight and dynamically loaded target with temporally and spatially resolved diagnostics. The long duration and high energy of the drive pulse allow for shockless acceleration of thick flyer plates with 8 ruin diameter and 0.1-2 nun thickness. With transient imaging displacement interferometry and line-imaging velocimetry, we demonstrate that the planarity (bow and tilt) of the loading is within 2-7 mead (with an average of 4 +/- 1 mrad), similar to that in conventional techniques including gas gun loading. Plasma beating of target is negligible in particular when a plasma shield is adopted. For flyer plate loading, supported shock waves can be achieved. Temporal shaping of the drive pulse in confined laser ablation enables flexible loading; e.g., quasi-isentropic, Taylor-wave, and off-Hugoniot loading. These dynamic loading techniques using long pulse lasers (0.1-10 mu s) along with short pulse, lasers (1-10 ns) can be an accurate, versatile and efficient complement to conventional shock wave loading for investigating such dynamic: responses of materials as Hugoniot elastic limit, plasticity, spall, shock roughness, equation of state; phase transition, and metallurgical characteristics of shock-recovered samples, in a wide range of strain rates and pressures at meso- and macroscopic scales.
C1 [Luo, S. N.; Greenfield, S. R.; Paisley, D. L.; Johnson, R. P.; Shimada, T.; Byler, D. D.; Loomis, E. N.; DiGiacomo, S. N.; Patterson, B. M.; McClellan, K. J.; Dickerson, R. M.; Koskelo, A. C.; Tonks, D. L.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Luo, SN (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
EM sluo@lanl.gov
OI Patterson, Brian/0000-0001-9244-7376
NR 37
TC 0
Z9 0
U1 1
U2 3
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7206-9
J9 PROC SPIE
PY 2008
VL 7005
AR 700514
DI 10.1117/12.782206
PN 1-2
PG 15
WC Optics; Physics, Applied
SC Optics; Physics
GA BIE38
UT WOS:000258905800029
ER
PT S
AU Moses, E
AF Moses, E.
BE Phipps, CR
TI Multi-megajoule NIF: Ushering in a new era in high energy density
science
SO HIGH-POWER LASER ABLATION VII, PTS 1-2
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on High-Power Laser Ablation VII
CY APR 20-27, 2008
CL Taos, NM
SP SPIE, Photon Associates, LLC, European Off Aerosp Res & Dev (United Kingdom)
DE National Ignition Facility (NIF); photon science (PS); Lawrence
Livermore National Laboratory (LLNL); inertial confinement fusion (ICF)
emission
ID NATIONAL-IGNITION-FACILITY
AB This paper describes the status of the stadium-sized National Ignition Facility (NIF), the world's largest laser system and first operational multi-megajoule laser. The 192-beam NIF, located at Lawrence Livermore National Laboratory (LLNL), is 96% complete and scheduled for completion in March 2009. The NIF laser will produce nanosecond laser pulses with energies up to approximately 4 MJ in the infrared (laser wavelength = 1.053-mu m) and 2MJ in the ultraviolet (laser wavelength = 0.35-mu m). With these energies NIF will access conditions of pressure and temperature not previously available on earth, allowing it to conduct experiments in support of the nation's national security, energy, and fundamental science goals. First ignition experiments at NIF are scheduled for FY2010. This paper will provide an overview of the NIF laser and the ignition, energy, and fundamental science activities at NIF.
C1 Lawrence Livermore Natl Lab, Natl Ignit Facil & Photon Sci, Livermore, CA 94550 USA.
RP Moses, E (reprint author), Lawrence Livermore Natl Lab, Natl Ignit Facil & Photon Sci, Livermore, CA 94550 USA.
NR 11
TC 2
Z9 2
U1 0
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 978-0-8194-7206-9
J9 PROC SPIE
PY 2008
VL 7005
AR 70050F
DI 10.1117/12.782724
PN 1-2
PG 11
WC Optics; Physics, Applied
SC Optics; Physics
GA BIE38
UT WOS:000258905800010
ER
PT S
AU Sherrill, ME
Abdallah, J
Csanak, G
Dodd, ES
Fukuda, Y
Akahane, Y
Aoyama, M
Inoue, N
Ueda, H
Yamakawa, K
Faenov, AY
Magunov, AI
Pikuz, TA
Skobelev, IY
AF Sherrill, M. E.
Abdallah, J., Jr.
Csanak, G.
Dodd, E. S.
Fukuda, Y.
Akahane, Y.
Aoyama, M.
Inoue, N.
Ueda, H.
Yamakawa, K.
Faenov, A. Ya.
Magunov, A. I.
Pikuz, T. A.
Skobelev, I. Yu.
BE Phipps, CR
TI Spectroscopic characterization of ultrashort laser driven targets
incorporating both Boltzmann and particle-in-cell models
SO HIGH-POWER LASER ABLATION VII, PTS 1-2
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on High-Power Laser Ablation VII
CY APR 20-27, 2008
CL Taos, NM
SP SPIE, Photon Associates, LLC, European Off Aerosp Res & Dev (United Kingdom)
DE Boltzmann solver; particle-in-cell (PIC) code; He-alpha and satellite
X-ray spectroscopy
ID X-RAY; CLUSTERS; PLASMA; IRRADIATION; GENERATION; ELECTRON; PULSES;
ENERGY; AR
AB A model that solves simultaneously both the electron and atomic kinetics was used to generate synthetic X-ray spectra to characterize high intensity ultrashort-laser-driven target experiments. A particle-in-cell simulation was used to model the laser interaction for both cluster and foil targets and provided the initial electron energy distribution function (EEDF) for a Boltzmann solver. Previously reported success in the spectroscopic characterization of an irradiated Ar cluster target has motivated the authors to apply this technique in a. feasibility study to assess the possibility of recording time resolved spectra of a 10 micron Ti foil target irradiated by a 500 fs, I= 1.0 x 10(18)W/cm(2) short-pulse laser. Though this model suggests that both Ar cluster and Ti foil plasmas are held in a highly non-equilibrium state for both the EEDF and the ion level populations for several picoseconds, the spectral line features of the foil experiment; was shown to evolve too quickly to be seen by current ultrafast time resolved spectrometers.
C1 [Sherrill, M. E.; Abdallah, J., Jr.; Csanak, G.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Sherrill, ME (reprint author), Los Alamos Natl Lab, Div Theoret, POB 1663, Los Alamos, NM 87545 USA.
NR 24
TC 0
Z9 0
U1 0
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 978-0-8194-7206-9
J9 PROC SPIE
PY 2008
VL 7005
AR 70051R
DI 10.1117/12.784468
PN 1-2
PG 11
WC Optics; Physics, Applied
SC Optics; Physics
GA BIE38
UT WOS:000258905800047
ER
PT S
AU Wu, SSQ
Soules, TF
Page, RH
Mitchell, SC
Kanz, VK
Beach, RJ
AF Wu, Sheldon S. Q.
Soules, Thomas F.
Page, Ralph H.
Mitchell, Scott C.
Kanz, V. Keith
Beach, Raymond J.
BE Phipps, CR
TI Resonance transition 795-nm rubidium laser using He buffer gas
SO HIGH-POWER LASER ABLATION VII, PTS 1-2
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on High-Power Laser Ablation VII
CY APR 20-27, 2008
CL Taos, NM
SP SPIE, Photon Associates, LLC, European Off Aerosp Res & Dev (United Kingdom)
DE rubidium laser; diode pumped alkali laser; DPAL
ID VAPOR LASER
AB Resonance transition rubidium laser (5(2)P(1/2)-> 5(2)S(1/2)) is demonstrated with a hydrocarbon-free buffer gas. Prior demonstrations of alkali resonance transition lasers have used ethane as either the buffer gas or a buffer gas component to promote rapid fine-structure mixing. However, our experience suggests that the alkali vapor reacts with the ethane producing carbon as one of the reaction products. This degrades long term laser reliability. Our recent experimental results with a "clean" helium-only buffer gas system pumped by a Ti:sapphire laser demonstrate all the advantages of the original alkali laser system, but without the reliability issues associated with the use of ethane. We further report a demonstration of a rubidium laser using a buffer gas consisting of pure He-3. Using isotopically enriched He-3 gas yields enhanced mixing of the Rb fine-structure levels. This enables efficient lasing at reduced He buffer gas pressure, improved thermal management in high average power Rb lasers and enhanced power scaling potential of such systems.
C1 [Wu, Sheldon S. Q.; Soules, Thomas F.; Page, Ralph H.; Mitchell, Scott C.; Kanz, V. Keith; Beach, Raymond J.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Wu, SSQ (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave, Livermore, CA 94551 USA.
NR 11
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 978-0-8194-7206-9
J9 PROC SPIE
PY 2008
VL 7005
AR 700523
DI 10.1117/12.782376
PN 1-2
PG 9
WC Optics; Physics, Applied
SC Optics; Physics
GA BIE38
UT WOS:000258905800057
ER
PT J
AU Alatas, A
Sinn, H
Zhao, JY
Said, AH
Leu, BM
Sturhahn, W
Alp, EE
Shen, GY
Prakapenka, VB
AF Alatas, Ahmet
Sinn, Harald
Zhao, Jiyong
Said, Ayman H.
Leu, Bogdan M.
Sturhahn, Wolfgang
Alp, Ercan E.
Shen, Guoyin
Prakapenka, Vitali B.
TI Experimental aspects of inelastic X-ray scattering studies on liquids
under extreme conditions (P-T)
SO HIGH PRESSURE RESEARCH
LA English
DT Article; Proceedings Paper
CT International Workshop on Synchrotron High-Pressure Mineral Physics and
Materials Science
CY DEC 06-07, 2007
CL Chicago, IL
SP Argonne Natl Lab, GSECARS, Geodyanm Res Ctr, Ehime Univ
DE inelastic X-ray scattering; collective excitations; liquid indium;
diamond anvil cell
ID MICROSCOPIC DYNAMICS; ENERGY RESOLUTION; WAVE VELOCITIES; IRON;
TEMPERATURES; PRESSURES; METALS; WATER; GPA
AB In this study, collective excitations of liquid indium are studied just above the melting point at different pressures (1.7 GPa, 240 degrees C; 3.0 GPa, 300 degrees C; 4.0 GPa, 360 degrees C). The pressures and temperatures are achieved by the use of an externally heated diamond anvil cell. Clear evidence for the existence of propagating modes is observed from the dynamical structure factor at constant momentum transfer (Q) up to about 18 nm(-1). The reason for the observed high elastic-scattering background is identified, and its effects on the determination of elastic properties such as viscosity are discussed.
C1 [Alatas, Ahmet; Sinn, Harald; Zhao, Jiyong; Said, Ayman H.; Leu, Bogdan M.; Sturhahn, Wolfgang; Alp, Ercan E.] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
[Shen, Guoyin] Carnegie Inst Washington, Geophys Lab, HPCAT, Argonne, IL USA.
[Shen, Guoyin] Carnegie Inst Washington, Geophys Lab, HPSynC, Argonne, IL USA.
[Prakapenka, Vitali B.] Univ Chicago, Consortium Adv Radiat Sources, Chicago, IL 60637 USA.
RP Alatas, A (reprint author), Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
EM alatas@aps.anl.gov
RI Shen, Guoyin/D-6527-2011; Leu, Bogdan/J-9952-2015
OI Leu, Bogdan/0000-0003-2020-0686
NR 29
TC 2
Z9 2
U1 0
U2 3
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0895-7959
J9 HIGH PRESSURE RES
JI High Pressure Res.
PY 2008
VL 28
IS 3
BP 175
EP 183
DI 10.1080/08957950802208928
PG 9
WC Physics, Multidisciplinary
SC Physics
GA 354HK
UT WOS:000259629400004
ER
PT J
AU Haskel, D
Tseng, YC
Souza-Neto, NM
Lang, JC
Sinogeikin, S
Mudryk, Y
Gschneidner, KA
Pecharsky, VK
AF Haskel, Daniel
Tseng, Y. C.
Souza-Neto, N. M.
Lang, J. C.
Sinogeikin, S.
Mudryk, Ya.
Gschneidner, K. A., Jr.
Pecharsky, V. K.
TI Magnetic spectroscopy at high pressures using X-ray magnetic circular
dichroism
SO HIGH PRESSURE RESEARCH
LA English
DT Article; Proceedings Paper
CT International Workshop on Synchrotron High-Pressure Mineral Physics and
Materials Science
CY DEC 06-07, 2007
CL Chicago, IL
SP Argonne Natl Lab, GSECARS, Geodyanm Res Ctr, Ehime Univ
DE magnetism; X-ray magnetic circular dichroism; XMCD; synchrotron
radiation; X-ray absorption
ID POST-PEROVSKITE; TRANSITION; IRON; XMCD; GD-5(SIXGE1-X)(4); ABSORPTION;
ORIGIN
AB The imbalance in the electronic density of states between spin-up and spin-down electrons characteristic of ferro(ferri)-magnetic materials gives rise to X-ray magnetic circular dichroism (XMCD) in the absorption of circularly polarized X-rays with opposite helicity. These dichroic effects are largest near element-selective atomic resonances and can be used to probe ferro(ferri)-magnetic ordering with element- and electronic orbital-selectivity. We describe recent developments at the Advanced Photon Source that allow measurements of XMCD in a diamond anvil cell. We discuss the challenges associated with these measurements as well as their potential to further our understanding of complex magnetic materials.
C1 [Haskel, Daniel; Tseng, Y. C.; Souza-Neto, N. M.; Lang, J. C.] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
[Sinogeikin, S.] Carnegie Inst Sci, HPCAT, Argonne, IL USA.
[Mudryk, Ya.; Gschneidner, K. A., Jr.; Pecharsky, V. K.] Iowa State Univ, Ames Lab, Mat & Engn Phys Program, Ames, IA USA.
RP Haskel, D (reprint author), Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
EM haskel@aps.anl.gov
RI Souza-Neto, Narcizo/G-1303-2010
OI Souza-Neto, Narcizo/0000-0002-7474-8017
NR 26
TC 11
Z9 11
U1 1
U2 7
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0895-7959
J9 HIGH PRESSURE RES
JI High Pressure Res.
PY 2008
VL 28
IS 3
BP 185
EP 192
DI 10.1080/08957950802020307
PG 8
WC Physics, Multidisciplinary
SC Physics
GA 354HK
UT WOS:000259629400005
ER
PT J
AU Yan, J
Adams, PD
Angel, RJ
Ross, NL
Rivers, M
Parise, JB
Clark, SM
AF Yan, J.
Adams, P. D.
Angel, R. J.
Ross, N. L.
Rivers, M.
Parise, J. B.
Clark, S. M.
TI The development of an automated data analysis system for high-pressure
powder diffraction data collected using an area detector
SO HIGH PRESSURE RESEARCH
LA English
DT Article; Proceedings Paper
CT International Workshop on Synchrotron High-Pressure Mineral Physics and
Materials Science
CY DEC 06-07, 2007
CL Chicago, IL
SP Argonne Natl Lab, GSECARS, Geodyanm Res Ctr, Ehime Univ
DE computer software; automation; high-pressure; powder diffraction
ID CRYSTALLOGRAPHIC STRUCTURE DETERMINATION; SOFTWARE; PHENIX
AB A program for the automation of the processing of powder diffraction data collected from an area detector is presented in this article. Encapsulation of existing software packages in wrapper programs can allow automation and linking of existing well-proven computer code. This eliminates the need to reinvest resources in developing new codes to meet evolving scientific needs. Here, we demonstrate this principle by automating the use of two programs commonly used in the processing of powder diffraction data from area detectors: fit2d and GSAS.
C1 [Yan, J.; Clark, S. M.] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA.
[Yan, J.; Angel, R. J.; Ross, N. L.] Virginia Tech, Dept Geosci, Blacksburg, VA USA.
[Rivers, M.] Argonne Natl Lab, Adv Photon Source, GSE, CARS, Argonne, IL 60439 USA.
[Parise, J. B.] SUNY Stony Brook, Dept Earth Sci, Stony Brook, NY 11794 USA.
RP Clark, SM (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA.
EM smclark@lbl.gov
RI Angel, Ross/K-9924-2015; Adams, Paul/A-1977-2013; Clark,
Simon/B-2041-2013
OI Angel, Ross/0000-0003-0861-398X; Adams, Paul/0000-0001-9333-8219; Clark,
Simon/0000-0002-7488-3438
NR 10
TC 2
Z9 2
U1 1
U2 9
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0895-7959
J9 HIGH PRESSURE RES
JI High Pressure Res.
PY 2008
VL 28
IS 3
BP 293
EP 298
DI 10.1080/08957950802258006
PG 6
WC Physics, Multidisciplinary
SC Physics
GA 354HK
UT WOS:000259629400015
ER
PT J
AU Scott, HP
Kiefer, B
Martin, CD
Boateng, N
Frank, MR
Meng, Y
AF Scott, Henry P.
Kiefer, Boris
Martin, C. David
Boateng, Nana
Frank, Mark R.
Meng, Yue
TI P-V equation of state for Fe(2)P and pressure-induced phase transition
in Fe(3)P
SO HIGH PRESSURE RESEARCH
LA English
DT Article; Proceedings Paper
CT International Workshop on Synchrotron High-Pressure Mineral Physics and
Materials Science
CY DEC 06-07, 2007
CL Chicago, IL
SP Argonne Natl Lab, GSECARS, Geodyanm Res Ctr, Ehime Univ
DE phosphide; equation of state; bulk modulus; planetary cores;
barringerite; schreibersite
ID PROJECTOR AUGMENTED-WAVE; GENERALIZED-GRADIENT APPROXIMATION;
TOTAL-ENERGY CALCULATIONS; EARTHS CORE; ULTRASOFT PSEUDOPOTENTIALS;
NEUTRON-DIFFRACTION; MAGNETIC TRANSITION; SINGLE-CRYSTAL; BULK MODULUS;
LIQUID-IRON
AB As part of our ongoing investigations of elasticity and high-pressure stability in the Fe-P system, we have measured the room-temperature bulk modulus (K(0T)) of Fe(2)P, barringerite, to 8 GPa using in situ synchrotron X-ray diffraction and diamond anvil cells. A second-order fit (i.e. dK/dP fixed at 4) to our experimental data using the Birch-Murnaghan equation of state produces a K(0T) of 165 +/- 3 GPa. This value is similar to 4% less than the experimental values for Fe(3)P. For comparison with the experimental data, we have also performed first-principle theoretical calculations on this phase. For ferromagnetic Fe(2)P at zero pressure, we find that the magnetic moments increase rapidly for a Hubbard U > 1 eV and are significantly higher than observed experimentally. Thus, our results support previous findings that magnetism in Fe(2)P is largely itinerant with at most a minor component due to on-site correlation in the iron-3d shell. Additionally, we present new high-pressure diffraction data for a natural Fe(3)P, schreibersite, sample which conclusively demonstrate that a first-order phase transformation occurs between 15 and 20 GPa.
C1 [Scott, Henry P.; Boateng, Nana] Indiana Univ, Dept Phys & Astron, South Bend, IN 46615 USA.
[Kiefer, Boris] New Mexico State Univ, Dept Phys, Las Cruces, NM 88003 USA.
[Martin, C. David] Argonne Natl Lab, Adv Photon Source, Xray Sci Div, Argonne, IL 60439 USA.
[Frank, Mark R.] No Illinois Univ, Dept Geog & Environm Geosci, De Kalb, IL USA.
[Meng, Yue] Carnegie Inst Washington, High Pressure Collaborat Access Team, Argonne, IL USA.
RP Scott, HP (reprint author), Indiana Univ, Dept Phys & Astron, South Bend, IN 46615 USA.
EM hpscott@iusb.edu
RI Frank, Mark/E-6331-2015
NR 50
TC 10
Z9 12
U1 1
U2 9
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0895-7959
J9 HIGH PRESSURE RES
JI High Pressure Res.
PY 2008
VL 28
IS 3
BP 375
EP 384
DI 10.1080/08957950802246506
PG 10
WC Physics, Multidisciplinary
SC Physics
GA 354HK
UT WOS:000259629400023
ER
PT J
AU Zhang, JZ
Li, BS
Zhao, YS
AF Zhang, Jianzhong
Li, Baosheng
Zhao, Yusheng
TI Pressure-induced shear-mode elastic softening in orthorhombic
BaCe(0.85)Y(0.15)O(2.925) perovskite
SO HIGH PRESSURE RESEARCH
LA English
DT Article; Proceedings Paper
CT International Workshop on Synchrotron High-Pressure Mineral Physics and
Materials Science
CY DEC 06-07, 2007
CL Chicago, IL
SP Argonne Natl Lab, GSECARS, Geodyanm Res Ctr, Ehime Univ
DE perovskite; ultrasonic interferometry; X-ray diffraction; high pressure;
elastic softening
ID Y-DOPED BACEO3; WAVE VELOCITIES; MULTI-ANVIL; PROTON; APPARATUS; NACL;
GPA
AB Compressional and shear wave velocities of orthorhombic BaCe(0.85) Y(0.15) O(2.925) perovskite were measured at high pressures up to 8.1GPa by ultrasonic interferometry combined with energy-dispersive synchrotron X-ray diffraction. At room temperature, the adiabatic bulk modulus increases with increasing pressure, as expected for most polycrystalline materials. The shear modulus, however, show a negative dependence on pressure over a pressure range of similar to 2-8.1GPa. This anomalous elastic softening indicates destabilization of the orthorhombic structure in BaCe(0.85)Y(0.15)O(2.925) perovskite over the experimental pressure range and is presumably the precursor to the first-order phase transition previously observed at 22GPa using Raman spectroscopic study.
C1 [Zhang, Jianzhong; Zhao, Yusheng] Los Alamos Natl Lab, LANSCE Div, Los Alamos, NM 87545 USA.
[Li, Baosheng] SUNY Stony Brook, Inst Mineral Phys, Stony Brook, NY 11794 USA.
RP Zhang, JZ (reprint author), Los Alamos Natl Lab, LANSCE Div, Los Alamos, NM 87545 USA.
EM jzhang@lanl.gov
RI Lujan Center, LANL/G-4896-2012; Li, Baosheng/C-1813-2013;
OI Zhang, Jianzhong/0000-0001-5508-1782
NR 25
TC 0
Z9 0
U1 0
U2 2
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0895-7959
J9 HIGH PRESSURE RES
JI High Pressure Res.
PY 2008
VL 28
IS 3
BP 415
EP 421
DI 10.1080/08957950802097594
PG 7
WC Physics, Multidisciplinary
SC Physics
GA 354HK
UT WOS:000259629400027
ER
PT J
AU Chen, JH
Yang, YP
Yu, T
Zhang, JZ
Zhao, YS
Wang, LP
AF Chen, Jiuhua
Yang, Yunpeng
Yu, Tony
Zhang, Jianzhong
Zhao, Yusheng
Wang, Liping
TI Strength measurement of boron suboxide B(6)O at high pressure and
temperature using in situ synchrotron X-ray diffraction
SO HIGH PRESSURE RESEARCH
LA English
DT Article; Proceedings Paper
CT International Workshop on Synchrotron High-Pressure Mineral Physics and
Materials Science
CY DEC 06-07, 2007
CL Chicago, IL
SP Argonne Natl Lab, GSECARS, Geodyanm Res Ctr, Ehime Univ
DE boron suboxide; strength; high pressure and temperature; X-ray
diffraction; anisotropy
ID YIELD STRENGTH; LOWER MANTLE; DEFORMATION; PEROVSKITE; ELASTICITY;
EQUATION; DIAMOND; STATE; B-12; MGO
AB The strength of boron suboxide (B(6)O) was measured at high pressure and temperature up to 8GPa and 800 degrees C using diffraction peak broadening analysis. The sample was synthesized at 6GPa and 1750 degrees C. In situ energy dispersive X-ray diffraction was conducted at the X17B2 beamline of the National Synchrotron Light Source. The differential stress in the powdered sample was derived through deconvolution of peak broadening of diffraction lines (0 2 1) and (1 1 3) during the compression and heating. The sample shows anisotropic yielding along the two orientations. The (0 2 1) orientation does not show yielding within the investigated pressure range (8 GPa) whereas the (1 1 3) orientation yields at 5 GPa. Upon heating, significant weakening (yielding) was observed at temperatures above 400 degrees C. The yield temperature of boron suboxide is much lower than that of diamond, 1200 degrees C, but similar to that observed in moissanite (SiC).
C1 [Chen, Jiuhua] Florida Int Univ, CeSMEC, Miami, FL 33199 USA.
[Chen, Jiuhua; Yang, Yunpeng; Yu, Tony; Wang, Liping] SUNY Stony Brook, Inst Mineral Phys, Stony Brook, NY 11794 USA.
[Chen, Jiuhua; Yang, Yunpeng; Yu, Tony; Wang, Liping] SUNY Stony Brook, Dept Geosci, Stony Brook, NY 11794 USA.
[Zhang, Jianzhong; Zhao, Yusheng] Los Alamos Natl Lab, LANSCE Div, Los Alamos, NM USA.
RP Chen, JH (reprint author), Florida Int Univ, CeSMEC, Miami, FL 33199 USA.
EM chenj@fiu.edu
RI Lujan Center, LANL/G-4896-2012;
OI Zhang, Jianzhong/0000-0001-5508-1782
NR 32
TC 1
Z9 1
U1 0
U2 4
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0895-7959
J9 HIGH PRESSURE RES
JI High Pressure Res.
PY 2008
VL 28
IS 3
BP 423
EP 430
DI 10.1080/08957950802246498
PG 8
WC Physics, Multidisciplinary
SC Physics
GA 354HK
UT WOS:000259629400028
ER
PT J
AU Casado, S
Lorenzana, HE
Caceres, M
Taravillo, M
Baonza, VG
AF Casado, S.
Lorenzana, H. E.
Caceres, M.
Taravillo, M.
Baonza, V. G.
TI Direct measurement of the liquid 4:1 methanol-ethanol equation of state
up to 5GPa
SO HIGH PRESSURE RESEARCH
LA English
DT Article
DE methanol-ethanol; equation of state; diamond anvil cell
AB Despite the widespread use of the 4:1 methanol-ethanol mixture as a hydrostatic medium by the high-pressure community, its equation of state (EOS) is usually substituted by that of pure methanol. Here we report accurate direct volumetric measurements of the room temperature EOS for this mixture up to 5GPa. A brief description of the optical technique (imaging+interferometric) specifically developed for this purpose is given, as well as the general characteristics of the required miniature diamond anvil cell. Our results are compared with the available data of similar pure fluids' EOS in the same pressure range. We find that there exist noticeable differences between the EOS of the mixture and that of pure methanol in terms of molar quantities.
C1 [Casado, S.; Caceres, M.; Taravillo, M.; Baonza, V. G.] Univ Complutense Madrid, MALTA Consolider Team, Dept Quim Fis 1, Madrid, Spain.
[Lorenzana, H. E.] Lawrence Livermore Natl Lab, Livermore, CA USA.
RP Baonza, VG (reprint author), Univ Complutense Madrid, MALTA Consolider Team, Dept Quim Fis 1, Madrid, Spain.
EM vgbaonza@quim.ucm.es
RI Taravillo, Mercedes/G-2147-2011; Garcia Baonza, Valentin/L-3826-2014;
Casado, Santiago/E-9566-2011; Caceres Alonso, Mercedes/G-8292-2015
OI Taravillo, Mercedes/0000-0003-1159-8530; Garcia Baonza,
Valentin/0000-0001-9994-0980; Casado, Santiago/0000-0002-2242-1805;
Caceres Alonso, Mercedes/0000-0002-8788-9660
FU MICINN [CSD2007-00045, MAT200613548-C02-01]; Comunidad de Madrid
[CCG07-UCM/MAT-2403]; MEC-FPU
FX This research was supported by MICINN under projects CSD2007-00045
(Consolider-Ingenio 2010) and MAT200613548-C02-01, and by the Comunidad
de Madrid under grant CCG07-UCM/MAT-2403. S. Casado acknowledges support
from the MEC-FPU grant program.
NR 6
TC 1
Z9 1
U1 2
U2 4
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0895-7959
J9 HIGH PRESSURE RES
JI High Pressure Res.
PY 2008
VL 28
IS 4
BP 637
EP 640
AR PII 906729794
DI 10.1080/08957950802444804
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 384HT
UT WOS:000261736600036
ER
PT S
AU Holcomb, GR
AF Holcomb, Gordon R.
BE Steinmetz, P
Wright, IG
Galerie, A
Monceau, D
Mathieu, S
TI Steam Oxidation of Advanced Steam Turbine Alloys
SO HIGH TEMPERATURE CORROSION AND PROTECTION OF MATERIALS 7, PTS 1 AND 2
SE Materials Science Forum
LA English
DT Proceedings Paper
CT 7th International Symposium on High Temperature Corrosion and Protection
of Materials
CY MAY 18-23, 2008
CL Les Embiez, FRANCE
SP Nancy Univ, Inst Polytech Grenoble, Inst Polytech Toulouse, CEFRACOR, ONR Global, VEOLIA Environm, ORNL, St Gobain, EPRI, Snecma Grp SAFRAN, CNRS
DE Chromia; Evaporation; Steam; Superalloy; Turbine; Ultra Supercritical
ID COAL POWER-PLANTS
AB Power generation from coal using ultra supercritical steam results in improved fuel efficiency and decreased greenhouse gas emissions. Results of ongoing research into the oxidation of candidate nickel-base alloys for ultra supercritical steam turbines are presented. Exposure conditions range from moist air at atmospheric pressure (650 degrees C to 800 degrees C) to steam at 34.5 MPa (650 degrees C to 760 degrees C). Parabolic scale growth coupled with internal oxidation and reactive evaporation of chromia are the primary corrosion mechanisms.
C1 Natl Energy Technol Lab, Albany, OR 97321 USA.
RP Holcomb, GR (reprint author), Natl Energy Technol Lab, 1450 Queen Ave SW, Albany, OR 97321 USA.
EM Gordon.Holcomb@neti.doe.gov
RI Holcomb, Gordon/G-9070-2013
OI Holcomb, Gordon/0000-0003-3542-5319
NR 13
TC 2
Z9 2
U1 1
U2 3
PU TRANS TECH PUBLICATIONS LTD
PI STAFA-ZURICH
PA LAUBLSRUTISTR 24, CH-8717 STAFA-ZURICH, SWITZERLAND
SN 0255-5476
J9 MATER SCI FORUM
PY 2008
VL 595-598
BP 299
EP 306
PG 8
WC Materials Science, Multidisciplinary
SC Materials Science
GA BIW45
UT WOS:000263369400038
ER
PT S
AU Wright, IG
Sabau, AS
Dooley, RB
AF Wright, I. G.
Sabau, A. S.
Dooley, R. B.
BE Steinmetz, P
Wright, IG
Galerie, A
Monceau, D
Mathieu, S
TI DEVELOPMENT OF STRAIN IN OXIDES GROWN IN STEAM TUBES
SO HIGH TEMPERATURE CORROSION AND PROTECTION OF MATERIALS 7, PTS 1 AND 2
SE Materials Science Forum
LA English
DT Proceedings Paper
CT 7th International Symposium on High Temperature Corrosion and Protection
of Materials
CY MAY 18-23, 2008
CL Les Embiez, FRANCE
SP Nancy Univ, Inst Polytech Grenoble, Inst Polytech Toulouse, CEFRACOR, ONR Global, VEOLIA Environm, ORNL, St Gobain, EPRI, Snecma Grp SAFRAN, CNRS
DE exfoliation; steam oxidation; computation of strains in oxides
ID RESIDUAL-STRESSES; BEHAVIOR; SCALES; CYLINDERS
AB In this study, the foundation is being developed for the numerical simulation of the processes that determine the oxide scale exfoliation behavior of the steam-side surfaces of superheater and reheater tubes in a steam boiler. Initially, the assumptions concerning the base state for calculating oxide strains also were critically examined. The state of stress-strain of an oxide growing on the inside surface of an externally-heated tube was considered for the conditions experienced in a boiler during transition from full- to partial-load operation. Since the rate at which the oxide grows is an important consideration, it was necessary to determine the appropriate temperature to use in the oxidation rate calculations. The existence of a temperature gradient through the tube, and the cyclic nature of the boiler operation (temperature and pressure) were considered; the growth temperature of the oxide was taken to be the oxide surface temperature. It was determined that the commonly-used approach for accounting for geometrical effects when calculating stress-strain development in a growing oxide scale of using the analogy of an infinitely-long flat plate gave sufficiently different results than when using a cylindrical geometry, that the latter was adopted as the preferred calculation procedure. Preliminary calculation of strains developed in multilayered oxides formed on alloy T22 as a function of boiler operating conditions indicated the magnitude of the strains in each layer; the large strain gradients between the layers inferred the importance of the detailed scale morphology in determining the mode of exfoliation.
C1 [Wright, I. G.; Sabau, A. S.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Dooley, R. B.] Struct Integr Associates Inc, Toronto, ON L6J 7L7, Canada.
RP Wright, IG (reprint author), Oak Ridge Natl Lab, 1 Bethel Valley Rd, Oak Ridge, TN 37831 USA.
EM wrightig@ornl.gov; sabaua@ornl.gov; bdooley@structint.com;
wrightig@ornl.gov
RI Sabau, Adrian/B-9571-2008
OI Sabau, Adrian/0000-0003-3088-6474
NR 23
TC 15
Z9 16
U1 1
U2 4
PU TRANS TECH PUBLICATIONS LTD
PI STAFA-ZURICH
PA LAUBLSRUTISTR 24, CH-8717 STAFA-ZURICH, SWITZERLAND
SN 0255-5476
J9 MATER SCI FORUM
PY 2008
VL 595-598
BP 387
EP 395
PG 9
WC Materials Science, Multidisciplinary
SC Materials Science
GA BIW45
UT WOS:000263369400047
ER
PT S
AU Matyas, J
Sundaram, SK
Hicks, BJ
Edmondson, AB
Arrigoni, BM
AF Matyas, J.
Sundaram, S. K.
Hicks, B. J.
Edmondson, A. B.
Arrigoni, B. M.
BE Steinmetz, P
Wright, IG
Galerie, A
Monceau, D
Mathieu, S
TI Slag-Refractory Interaction in Slagging Coal Gasifiers
SO HIGH TEMPERATURE CORROSION AND PROTECTION OF MATERIALS 7, PTS 1 AND 2
SE Materials Science Forum
LA English
DT Proceedings Paper
CT 7th International Symposium on High Temperature Corrosion and Protection
of Materials
CY MAY 18-23, 2008
CL Les Embiez, FRANCE
SP Nancy Univ, Inst Polytech Grenoble, Inst Polytech Toulouse, CEFRACOR, ONR Global, VEOLIA Environm, ORNL, St Gobain, EPRI, Snecma Grp SAFRAN, CNRS
DE Coal Slag; High-Chromia Refractory; Slag Penetration; Viscosity; Contact
Angle; Iron-Chromium Spinel; Slagging Gasifier
AB The combustion chamber of slagging coal gasifiers is lined with refractories to protect the steel shell of the gasifier from elevated temperatures and corrosive attack of the coal slag. Refractories composed primarily of Cr(2)O(3) have been found most resistant to slag corrosion but they continue to fail performance requirements. Post-mortem analysis of high-chromia refractory bricks collected from commercial gasifiers suggests that slag penetration and subsequent spalling of refractory are the cause of the short service life of gasifier refractories [1]. Laboratory tests were conducted to determine the penetration depth of three slags representative of a wide variety of coals in the United States into chromia-alumina and two high-chromia refractories. Variables tested were refractory-slag combinations and two partial pressures of O(2). Slag penetration depths were measured from spliced images of each refractory. Samples heated to 1470 degrees C for 2 hrs had maximum penetration depths ranging from 1.99 +/- 0.15 mm to at least 21.6 mm. Aurex 95P, a high-chromia refractory containing 3.3% phosphorous pentoxide (P(2)O(5)), showed the least slag penetration of all refractories tested. P(2)O(5) likely reacts with CaO and MgO in the slag, forming an immiscible Ca-Mg phosphate phase. The extraction of basic components from slag causes an increase in slag viscosity restricting the molten slag penetration into the refractory.
C1 [Matyas, J.; Sundaram, S. K.; Hicks, B. J.; Edmondson, A. B.; Arrigoni, B. M.] Pacific NW Natl Lab, Richland, WA 99354 USA.
RP Matyas, J (reprint author), Pacific NW Natl Lab, 350 Hills St, Richland, WA 99354 USA.
EM Josef.Matyas@pnl.gov; SK.Sundaram@pnl.gov; bjh@byu.edu;
Autumn.Edmondson@pnl.gov; Benjamin.Arrigoni@pnl.gov
OI Hicks, Brent/0000-0003-4582-2326
NR 7
TC 8
Z9 8
U1 0
U2 2
PU TRANS TECH PUBLICATIONS LTD
PI STAFA-ZURICH
PA LAUBLSRUTISTR 24, CH-8717 STAFA-ZURICH, SWITZERLAND
SN 0255-5476
J9 MATER SCI FORUM
PY 2008
VL 595-598
BP 397
EP 405
PG 9
WC Materials Science, Multidisciplinary
SC Materials Science
GA BIW45
UT WOS:000263369400048
ER
PT S
AU Pint, BA
AF Pint, B. A.
BE Steinmetz, P
Wright, IG
Galerie, A
Monceau, D
Mathieu, S
TI Overview of coating and compatibility research for Fusion Energy in the
US
SO HIGH TEMPERATURE CORROSION AND PROTECTION OF MATERIALS 7, PTS 1 AND 2
SE Materials Science Forum
LA English
DT Proceedings Paper
CT 7th International Symposium on High Temperature Corrosion and Protection
of Materials
CY MAY 18-23, 2008
CL Les Embiez, FRANCE
SP Nancy Univ, Inst Polytech Grenoble, Inst Polytech Toulouse, CEFRACOR, ONR Global, VEOLIA Environm, ORNL, St Gobain, EPRI, Snecma Grp SAFRAN, CNRS
DE fusion energy; liquid metals; refractory metals; lithium; SiC composites
ID DUAL COOLANT BLANKET; ELECTRICALLY INSULATING COATINGS; CORROSION
BEHAVIOR; VANADIUM ALLOYS; PB-17LI; LITHIUM; ISSUES; ITER; PERMEATION;
OXIDATION
AB Planning for a U.S. test blanket module to operate in the internationally-sponsored ITER reactor has focused attention on the many coating and compatibility issues that will need to be solved before fusion energy moves from concept to commercial reality. Examples are given for (1) a dual-layer, electrically-resistant coating as a potential solution to reduce the magnetohydrodynamic pressure drop with liquid Li and (2) materials compatibility issues with eutectic Pb-Li for conventional alloys and SiC/SiC composites. Because of the reduced activity of Li in Pb-Li, a wider range of functional materials can be considered in this system. Nevertheless, an Al(2)O(3) scale on FeCrAl was transformed to LiAlO(2) after exposure to Pb-Li at 800 degrees C.
C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Pint, BA (reprint author), Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA.
EM pintba@ornl.gov
RI Pint, Bruce/A-8435-2008
OI Pint, Bruce/0000-0002-9165-3335
NR 29
TC 7
Z9 7
U1 0
U2 0
PU TRANS TECH PUBLICATIONS LTD
PI STAFA-ZURICH
PA LAUBLSRUTISTR 24, CH-8717 STAFA-ZURICH, SWITZERLAND
SN 0255-5476
J9 MATER SCI FORUM
PY 2008
VL 595-598
BP 549
EP 558
PG 10
WC Materials Science, Multidisciplinary
SC Materials Science
GA BIW45
UT WOS:000263369400063
ER
PT S
AU Hurley, JP
Kelley, C
Bornstein, N
Wright, IG
AF Hurley, John P.
Kelley, Carl
Bornstein, Norman
Wright, Ian G.
BE Steinmetz, P
Wright, IG
Galerie, A
Monceau, D
Mathieu, S
TI Corrosion of MA754 and MA956 in a Commercial Aluminum Melter
SO HIGH TEMPERATURE CORROSION AND PROTECTION OF MATERIALS 7, PTS 1 AND 2
SE Materials Science Forum
LA English
DT Proceedings Paper
CT 7th International Symposium on High Temperature Corrosion and Protection
of Materials
CY MAY 18-23, 2008
CL Les Embiez, FRANCE
SP Nancy Univ, Inst Polytech Grenoble, Inst Polytech Toulouse, CEFRACOR, ONR Global, VEOLIA Environm, ORNL, St Gobain, EPRI, Snecma Grp SAFRAN, CNRS
DE MA956; MA754; Corrosion; Aluminum melter
AB The University of North Dakota Energy & Environmental Research Center is working with Oak Ridge National Laboratory to test two oxide dispersion-strengthened alloys that could be,e used to construct very high-temperature heat recuperators for the aluminum-melting industry. For the initial tests, uncooled rings of MA754 and MA956 piping were exposed for 5(1)/(2) months to gases leaving an aluminum melter furnace at 1200 degrees-1290 degrees C. The MA956 Suffered spotty areas of severe conosion and lost 25% of its weight. Scanning electron microscopy showed that there were small spots of alkali-rich corrosion products on the alloy surfaces, indicating the impact of droplets of fluxing agents. The corrosion products in these areas were mixed Fe, Cr, and Al oxides, which were depleted in Cr near the gas surface. However, Al concentrations in the remaining metal were typically between 3.5% and 4.0%, so there was a sufficient reservoir of Al remaining in the alloy to prevent simple breakaway corrosion which could have occurred if the Al were significantly depleted.
The MA754 lost approximately 15% of its weight and showed void formation within 2 turn of the gas-metal surfaces. Within the porous area, the Cr had largely segregated into oxide precipitates up to 50 mu m in diameter, leaving the remaining metal Ni-rich. Below the porous layer, the alloy composition was relatively unchanged. Remains of Na- and Al-rich particles that had impacted the surface sporadically were visible but had not obviously affected the surface scale as they had with the MA956.
C1 [Hurley, John P.] Univ N Dakota, Energy & Environm Res Ctr, Grand Forks, ND 58202 USA.
[Kelley, Carl] Nat Fuel, Ft Wayne, IN 46825 USA.
[Wright, Ian G.] Oak Ridge Natl Lab, Corros Sci & Technol Grp, Oak Ridge, TN 37831 USA.
RP Hurley, JP (reprint author), Univ N Dakota, Energy & Environm Res Ctr, 15 N 23rd St,Stop 9018, Grand Forks, ND 58202 USA.
EM ajhurley@undeerc.org; bckelley@saalloys.com;
cnormanbornstein@sbcglobal.net; dwrightig@ornl.gov; dwrightig@ornl.gov
NR 6
TC 1
Z9 1
U1 0
U2 1
PU TRANS TECH PUBLICATIONS LTD
PI STAFA-ZURICH
PA LAUBLSRUTISTR 24, CH-8717 STAFA-ZURICH, SWITZERLAND
SN 0255-5476
J9 MATER SCI FORUM
PY 2008
VL 595-598
BP 611
EP 619
PG 9
WC Materials Science, Multidisciplinary
SC Materials Science
GA BIW45
UT WOS:000263369400070
ER
PT S
AU Brady, MP
Yamamoto, Y
Pint, BA
Santella, ML
Maziasz, PJ
Walker, LR
AF Brady, M. P.
Yamamoto, Y.
Pint, B. A.
Santella, M. L.
Maziasz, P. J.
Walker, L. R.
BE Steinmetz, P
Wright, IG
Galerie, A
Monceau, D
Mathieu, S
TI On the Loss of Protective Scale Formation in Creep-Resistant,
Alumina-Forming Austenitic Stainless Steels at 900 degrees C in Air
SO HIGH TEMPERATURE CORROSION AND PROTECTION OF MATERIALS 7, PTS 1 AND 2
SE Materials Science Forum
LA English
DT Proceedings Paper
CT 7th International Symposium on High Temperature Corrosion and Protection
of Materials
CY MAY 18-23, 2008
CL Les Embiez, FRANCE
SP Nancy Univ, Inst Polytech Grenoble, Inst Polytech Toulouse, CEFRACOR, ONR Global, VEOLIA Environm, ORNL, St Gobain, EPRI, Snecma Grp SAFRAN, CNRS
DE austenitic stainless steel; alumina; internal oxidation; third-element
effect
ID OXIDATION; ALLOYS; TEMPERATURE; NITRIDATION
AB A family of creep-resistant, Al(2)O(3)-forming austenitic (AFA) stainless steels was recently developed. The alloys exhibit excellent oxidation resistance up to similar to 800 degrees C, but are susceptible to internal attack of Al at higher temperatures. In the present work, higher levels of Ni, Cr, Al, and Nb additions were found to correlate with improved oxidation behavior at 900 degrees C in air. The alloys generally appeared to be initially capable of external Al(2)O(3) scale formation, with a subsequent transition to internal attack of Al (internal oxidation and internal nitridation) that is dependent on alloy composition. Compositional profiles at the alloy/scale interface suggest that the transition to internal oxidation is preceded by subsurface depletion of Al in the lower-Al compositions. In higher Al-containing compositions, NiAl second-phase precipitates act as an Al reservoir, and Al depletion may not be a key factor. Alloy design directions to increase the upper-temperature limit of protective Al(2)O(3) scale formation in these alloys are discussed.
C1 [Brady, M. P.; Yamamoto, Y.; Pint, B. A.; Santella, M. L.; Maziasz, P. J.; Walker, L. R.] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
RP Brady, MP (reprint author), Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
EM bradymp@ornl.gov; yarnamotoy@ornl.gov; pintba@ornl.gov;
santellaml@ornl.gov; maziaszpj@ornl.gov; walkerlr@ornl.gov
RI Brady, Michael/A-8122-2008; Pint, Bruce/A-8435-2008;
OI Brady, Michael/0000-0003-1338-4747; Pint, Bruce/0000-0002-9165-3335;
Maziasz, Philip/0000-0001-8207-334X
NR 15
TC 13
Z9 15
U1 0
U2 5
PU TRANS TECH PUBLICATIONS LTD
PI STAFA-ZURICH
PA LAUBLSRUTISTR 24, CH-8717 STAFA-ZURICH, SWITZERLAND
SN 0255-5476
J9 MATER SCI FORUM
PY 2008
VL 595-598
BP 725
EP 732
PG 8
WC Materials Science, Multidisciplinary
SC Materials Science
GA BIW45
UT WOS:000263369400082
ER
PT S
AU Pint, BA
Porter, WD
Wright, IG
AF Pint, B. A.
Porter, W. D.
Wright, I. G.
BE Steinmetz, P
Wright, IG
Galerie, A
Monceau, D
Mathieu, S
TI The Effect of Thermal Expansion on Spallation Behavior of Fe-Base
Alumina-Forming Alloys
SO HIGH TEMPERATURE CORROSION AND PROTECTION OF MATERIALS 7, PTS 1 AND 2
SE Materials Science Forum
LA English
DT Proceedings Paper
CT 7th International Symposium on High Temperature Corrosion and Protection
of Materials
CY MAY 18-23, 2008
CL Les Embiez, FRANCE
SP Nancy Univ, Inst Polytech Grenoble, Inst Polytech Toulouse, CEFRACOR, ONR Global, VEOLIA Environm, ORNL, St Gobain, EPRI, Snecma Grp SAFRAN, CNRS
DE FeCrAl; Fe(Al); thermal expansion coefficient; intermetallics;
spallation resistance
ID HIGH-TEMPERATURE OXIDATION; IRON ALUMINIDES; AL ALLOYS; PERFORMANCE;
SUPERALLOYS; SCALES
AB Long-term cyclic oxidation behavior was compared for commercial FeCrAl alloys and mode. Fe-Al and FeCrAl alloys, and their coefficients of thermal expansion (CTE) were measured. For single-phase disordered (ferritic) Fe(Al) alloys, the CTE increased only slightly with Al content and was similar to that of FeCrAl alloys. More significant CTE increases were observed at >= 20%Al, as intermetallic phases, Fe(3)Al and FeAl, formed. As expected, the intermetallic compositions showed increased oxide spallation rates during cyclic oxidation at 1100 degrees and 1200 degrees C. However, after extensive spallation and loss of Al from the substrate, the compositions of Fe(3)Al and FeAl specimens entered the ferritic phase field, and the amount of scale spallation decreased. Among commercial oxide dispersion strengthened (ODS) FeCrAl alloys, a composition containing Mo (ODM751) exhibited the lowest thermal expansion and showed the slowest degradation rate in long-term testing at 1100 degrees C. The concept of minimizing CTE as a route for alloy development was investigated.
C1 [Pint, B. A.; Porter, W. D.; Wright, I. G.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Pint, BA (reprint author), Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA.
EM pintba@ornl.gov
RI Pint, Bruce/A-8435-2008
OI Pint, Bruce/0000-0002-9165-3335
NR 29
TC 8
Z9 9
U1 0
U2 4
PU TRANS TECH PUBLICATIONS LTD
PI STAFA-ZURICH
PA LAUBLSRUTISTR 24, CH-8717 STAFA-ZURICH, SWITZERLAND
SN 0255-5476
J9 MATER SCI FORUM
PY 2008
VL 595-598
BP 1083
EP 1092
PG 10
WC Materials Science, Multidisciplinary
SC Materials Science
GA BIW45
UT WOS:000263369400122
ER
PT S
AU Garimella, N
Brady, MP
Sohn, YH
AF Garimella, N.
Brady, M. P.
Sohn, Y. H.
BE Steinmetz, P
Wright, IG
Galerie, A
Monceau, D
Mathieu, S
TI Ternary and Quaternary Interdiffusion in gamma (fcc) Fe-Ni-Cr-X (X = Si,
Ge) Alloys at 900 degrees C
SO HIGH TEMPERATURE CORROSION AND PROTECTION OF MATERIALS 7, PTS 1 AND 2
SE Materials Science Forum
LA English
DT Proceedings Paper
CT 7th International Symposium on High Temperature Corrosion and Protection
of Materials
CY MAY 18-23, 2008
CL Les Embiez, FRANCE
SP Nancy Univ, Inst Polytech Grenoble, Inst Polytech Toulouse, CEFRACOR, ONR Global, VEOLIA Environm, ORNL, St Gobain, EPRI, Snecma Grp SAFRAN, CNRS
DE Multicomponent diffusion; interdiffusion coefficients; Austenitic alloys
ID OXIDATION RESISTANCE; DIFFUSION COUPLES; PD ALLOYS; SILICON;
COEFFICIENTS; ADDITIONS; ELEMENTS; AL
AB Interdiffusion in Fe-Ni-Cr (fcc gamma phase) alloys with small additions of Si and Ge at 900 degrees C was studied using solid-to-solid diffusion couples. Alloy rods of Fe-24 at.%Ni, Fe-24 at.%Ni-22at.%Cr, Fe-24 at.%Ni-22at.%Cr-4at.%Si and Fe-24 at.%Ni-22at.%Cr-1.7at.%Ge were cast using arc-melt, and homogenized at 900 degrees C for 168 hours. Sectioned alloy disks from the rods were polished, and diffusion couples were assembled with in Invar steel jig, encapsulated in Argon after several hydrogen flushes, and annealed atz 900 degrees C for 168 hours. Polished cross-sections of the diffusion couples were characterized to determine experimental concentration profiles using electron probe microanalysis with pure elemental standards. Interdiffusion fluxes of individual components were calculated directly from the experimental concentration profiles, and the moments of interdiffusion flux profiles were examined to determine the average ternary and quaternary interdiffusion coefficients. Effects of alloying additions on the interdiffusional behavior of Fe-Ni-Cr-X alloys at 900 degrees C are presented with due consideration for the formation of protective Cr(2)O(3) scale.
C1 [Garimella, N.; Sohn, Y. H.] Univ Cent Florida, Adv Mat Proc & Anal Ctr, Orlando, FL 32816 USA.
[Garimella, N.; Sohn, Y. H.] Univ Cent Florida, Dept Mech Mat & Aerosp Engn, Orlando, FL 32816 USA.
[Brady, M. P.] Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN USA.
RP Garimella, N (reprint author), Univ Cent Florida, Adv Mat Proc & Anal Ctr, Orlando, FL 32816 USA.
EM garimella_n@yahoo.com; bradymp@ornl.gov; ysohn@mail.ucf.edu
RI Brady, Michael/A-8122-2008
OI Brady, Michael/0000-0003-1338-4747
NR 18
TC 1
Z9 1
U1 1
U2 2
PU TRANS TECH PUBLICATIONS LTD
PI STAFA-ZURICH
PA LAUBLSRUTISTR 24, CH-8717 STAFA-ZURICH, SWITZERLAND
SN 0255-5476
J9 MATER SCI FORUM
PY 2008
VL 595-598
BP 1145
EP 1152
PG 8
WC Materials Science, Multidisciplinary
SC Materials Science
GA BIW45
UT WOS:000263369400129
ER
PT J
AU Xing, C
Wang, SQ
Pharr, GM
Groom, LH
AF Xing, Cheng
Wang, Siqun
Pharr, George M.
Groom, Leslie H.
TI Effect off thermo-mechanical reffering pressure on the properties of
wood fibers as measured by nanindentation and atomic force microscopy
SO HOLZFORSCHUNG
LA English
DT Article
DE atomic force microscopy (AFM); nanoindentation; nano-mechanical
properties; refined fiber; thermomechanical refining
ID MECHANICAL-PROPERTIES; LOBLOLLY-PINE; CELL-WALLS; NANOINDENTATION;
HARDNESS; DENSITY; PERFORMANCE; MODULUS
AB Refined wood fibers of a 54-year-old loblolly pine (Pinus taeda L.) mature wood were investigated by nanoindentation and atomic force microscopy (AFM). The effect of steam pressure, in the range of 2-18 bar, during thermomechanical refining was investigated and the nanomechanical properties and nano- or micro-level damages of the cell wall were evaluated. The results indicate that refining pressure has important effects on the physical and mechanical properties of refined fibers. No obvious damage was observed in the cell walls at pressures between 2 and 4 bar. Nano-cracks (most less than 500 nm in width) were found in fibers at pressures in the range of 6-12 bar, and micro-cracks (more than 5 mu m in width) were found in fibers subjected to pressures of 14 and 18 ban The damages caused at higher pressures were more severe in layers close to the lumen than on the fiber surfaces. Under special circumstances, the S, layer was heavily damaged. The natural shape of the cross sectional dimensions of the cell walls was not changed at lower pressures (2 and 4 bar), but, as pressure was increased, the fibers tended to collapse. At pressures around 18 bar, the lumina were augmented again. The nano-mechanical properties in terms of elastic modulus and hardness were obviously decreased, while nanoindentation creep increased with refining pressure.
C1 [Xing, Cheng; Wang, Siqun] Univ Tennessee, Tennessee Forest Prod Ctr, Knoxville, TN 37996 USA.
[Pharr, George M.] Univ Tennessee, Dept Mat Sci, Knoxville, TN USA.
[Pharr, George M.] Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN USA.
[Groom, Leslie H.] USDA, So Res Stn, Forest Serv, Pineville, LA USA.
RP Wang, SQ (reprint author), Univ Tennessee, Tennessee Forest Prod Ctr, 2506 Jacob Dr, Knoxville, TN 37996 USA.
EM swang@utk.edu
RI Xing, Cheng/N-3516-2013
OI Xing, Cheng/0000-0002-8263-8889
NR 26
TC 24
Z9 28
U1 1
U2 8
PU WALTER DE GRUYTER & CO
PI BERLIN
PA GENTHINER STRASSE 13, D-10785 BERLIN, GERMANY
SN 0018-3830
J9 HOLZFORSCHUNG
JI Holzforschung
PY 2008
VL 62
IS 2
BP 230
EP 236
DI 10.1515/HF.2008.050
PG 7
WC Forestry; Materials Science, Paper & Wood
SC Forestry; Materials Science
GA 272IN
UT WOS:000253853200017
ER
PT J
AU WoldeGabriel, G
Gilbert, WH
Hart, WK
Renne, PR
Ambrose, SH
AF WoldeGabriel, Giday
Gilbert, W. Henry
Hart, William K.
Renne, Paul R.
Ambrose, Stanley H.
BE Gilbert, WH
Asfaw, B
TI Geology and Geochronology
SO HOMO ERECTUS: PLEISTOCENE EVIDENCE FROM THE MIDDLE AWASH, ETHIOPIA
SE Middle Awash Series
LA English
DT Article; Book Chapter
C1 [WoldeGabriel, Giday] Los Alamos Natl Lab, Div Earth & Environm Sci, Environm Geol & Spatial Anal Grp, Los Alamos, NM 87545 USA.
[Renne, Paul R.] Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA.
[Renne, Paul R.] Berkeley Geochronol Ctr, Berkeley, CA USA.
[Gilbert, W. Henry] Univ Calif Berkeley, Human Evolut Res Ctr, Berkeley, CA 94720 USA.
[Gilbert, W. Henry] Calif State Univ, Dept Anthropol, E Bay, CA USA.
[Ambrose, Stanley H.] Univ Illinois, Dept Anthropol, Ctr African Studies,Program Ecol & Evolutionary B, Nutr Sci Interdisciplinary Grad Program, Urbana, IL 61801 USA.
[Hart, William K.] Miami Univ, Dept Geol, Geol Field Stn, Oxford, OH 45056 USA.
RP WoldeGabriel, G (reprint author), Los Alamos Natl Lab, Div Earth & Environm Sci, Environm Geol & Spatial Anal Grp, Los Alamos, NM 87545 USA.
NR 0
TC 5
Z9 5
U1 1
U2 1
PU UNIV CALIFORNIA PRESS
PI BERKELEY
PA 2120 BERKELEY WAY, BERKELEY, CA 94720 USA
BN 978-0-520-93377-4
J9 MID AWASH SER
PY 2008
VL 1
BP 13
EP 43
PG 31
WC Anthropology
SC Anthropology
GA BXF32
UT WOS:000295938500005
ER
PT J
AU Efroymson, RA
Peterson, MJ
Jones, DS
Suter, GW
AF Efroymson, Rebecca A.
Peterson, Mark J.
Jones, Daniel S.
Suter, Glenn W., II
TI The Apache Longbow-Hellfire Missile Test at Yuma Proving Ground:
Introduction and Problem Formulation for a Multiple Stressor Risk
Assessment
SO HUMAN AND ECOLOGICAL RISK ASSESSMENT
LA English
DT Article
DE problem formulation; military; ecological risk assessment; Sonoran
desert; mule deer; desert wash
ID DESERT MULE DEER; ALTITUDE AIRCRAFT OVERFLIGHTS; ASSESSMENT FRAMEWORK;
MILITARY MANEUVERS; ECOLOGICAL RISKS; MOJAVE DESERT; HABITAT USE;
LANDSCAPES
AB An ecological risk assessment was conducted at Yuma Proving Ground, Arizona, as a demonstration of the Military Ecological Risk Assessment Framework (MERAF). The focus of the assessment was a testing program at the Cibola Range, which involved an Apache Longbow helicopter firing Hellfire missiles at moving targets, that is, M60-A1 tanks. The problem formulation for the assessment included conceptual models for three component activities of the test, helicopter overflight, missile firing, and tracked vehicle movement, and two ecological endpoint entities, woody desert wash communities and desert mule deer (Odocoileus hemionus crooki) populations. An activity-specific risk assessment framework was available to provide guidance for assessing risks associated with aircraft overflights. Key environmental features of the assessment area include barren desert pavement and tree-lined desert washes. The primary stressors associated with helicopter overflights were sound and the view of the aircraft. The primary stressor associated with Hellfire missile firing was sound. The principal stressor associated with tracked vehicle movement was soil disturbance, and a resulting, secondary stressor was hydrological change. Water loss to desert washes and wash vegetation was expected to result from increased ponding, infiltration, and/or evaporation associated with disturbances to desert pavement. A plan for estimating integrated risks from the three military activities was included in the problem formulation.
C1 [Efroymson, Rebecca A.; Peterson, Mark J.; Jones, Daniel S.] Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
[Suter, Glenn W., II] US EPA, Natl Ctr Environm Assessment, Cincinnati, OH 45268 USA.
RP Efroymson, RA (reprint author), Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
EM efroymsonra@ornl.gov
OI Efroymson, Rebecca/0000-0002-3190-880X
FU U. S. Government [DE-AC05-00OR22725]
FX This article has been authored by a contractor of the U. S. Government
under contract DE-AC05-00OR22725. Accordingly, the U. S. Government
retains a nonexclusive, royalty-free license to publish or reproduce the
published form of this contribution, or allow others to do so, for U. S.
Government purposes.
NR 34
TC 1
Z9 1
U1 0
U2 8
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 1080-7039
J9 HUM ECOL RISK ASSESS
JI Hum. Ecol. Risk Assess.
PY 2008
VL 14
IS 5
BP 854
EP 870
DI 10.1080/10807030802387457
PG 17
WC Biodiversity Conservation; Environmental Sciences
SC Biodiversity & Conservation; Environmental Sciences & Ecology
GA 378QC
UT WOS:000261338000002
ER
PT J
AU Efroymson, RA
Hargrove, WW
Suter, GW
AF Efroymson, Rebecca A.
Hargrove, William W.
Suter, Glenn W., II
TI The Apache Longbow-Hellfire Missile Test at Yuma Proving Ground:
Ecological Risk Assessment for Helicopter Overflight
SO HUMAN AND ECOLOGICAL RISK ASSESSMENT
LA English
DT Article
DE ecological risk assessment; aircraft overflight; mule deer; noise;
noise; contour; sound
ID ALTITUDE AIRCRAFT OVERFLIGHTS; MULE DEER; ASSESSMENT FRAMEWORK; MOUNTAIN
SHEEP; RESPONSES; CARIBOU
AB A multi-stressor risk assessment was conducted at Yuma Proving Ground, Arizona, as a demonstration of the Military Ecological Risk Assessment Framework. The focus of the assessment was a testing program at Cibola Range, which involved an Apache Longbow helicopter firing Hellfire missiles at moving targets, that is, M60-A1 tanks. This article focuses on the wildlife risk assessment for the helicopter overflight. The primary stressors were sound and the view of the aircraft. Exposure to desert mule deer (Odocoileus hemionus crooki) was quantified using Air Force sound contour programs NOISEMAP and MR NMAP, which gave very different results. Slant distance from helicopters to deer was also used as a measure of exposure that integrated risk from sound and view of the aircraft. Exposure-response models for the characterization of effects consisted of behavioral thresholds in sound exposure level or maximum sound level units or slant distance. Available sound thresholds were limited for desert mule deer, but a distribution of slant-distance thresholds was available for ungulates. The risk characterization used a weight-of-evidence approach and concluded that risk to mule deer behavior from the Apache overflight is uncertain, but that no risk to mule deer abundance and reproduction is expected.
C1 [Efroymson, Rebecca A.; Hargrove, William W.] Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
[Suter, Glenn W., II] US EPA, Natl Ctr Environm Assessment, Cincinnati, OH 45268 USA.
RP Efroymson, RA (reprint author), Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
EM efroymsonra@ornl.gov
OI Efroymson, Rebecca/0000-0002-3190-880X
FU U. S. Government [DE-AC05-00OR22725]
FX This article has been authored by a contractor of the U. S. Government
under contract DE-AC05-00OR22725. Accordingly, the U. S. Government
retains a nonexclusive, royalty-free license to publish or reproduce the
published form of this contribution, or allow others to do so, for U. S.
Government purposes.
NR 31
TC 0
Z9 0
U1 1
U2 8
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 530 WALNUT STREET, STE 850, PHILADELPHIA, PA 19106 USA
SN 1080-7039
EI 1549-7860
J9 HUM ECOL RISK ASSESS
JI Hum. Ecol. Risk Assess.
PY 2008
VL 14
IS 5
BP 871
EP 897
DI 10.1080/10807030802387481
PG 27
WC Biodiversity Conservation; Environmental Sciences
SC Biodiversity & Conservation; Environmental Sciences & Ecology
GA 378QC
UT WOS:000261338000003
ER
PT J
AU Jones, DS
Efroymson, RA
Hargrove, WW
Suter, GW
Pater, LL
AF Jones, Daniel S.
Efroymson, Rebecca A.
Hargrove, William W.
Suter, Glenn W., II
Pater, Larry L.
TI The Apache Longbow-Hellfire Missile Test at Yuma Proving Ground:
Ecological Risk Assessment for Missile Firing
SO HUMAN AND ECOLOGICAL RISK ASSESSMENT
LA English
DT Article
DE ecological risk assessment; impulsive sound; blast noise; missile; mule
deer; Sonoran desert; military
ID MILITARY
AB A multiple stressor risk assessment was conducted at Yuma Proving Ground, Arizona, as a demonstration of the Military Ecological Risk Assessment Framework. The focus was a testing program at Cibola Range, which involved an Apache Longbow helicopter firing Hellfire missiles at moving targets, that is, M60-A1 tanks. This article describes the ecological risk assessment for the missile launch and detonation. The primary stressor associated with this activity was sound. Other minor stressors included the detonation impact, shrapnel, and fire. Exposure to desert mule deer (Odocoileus hemionus crooki) was quantified using the Army sound contour program BNOISE2, as well as distances from the explosion to deer. Few effects data were available from related studies. Exposure-response models for the characterization of effects consisted of human "disturbance" and hearing damage thresholds in units of C-weighted decibels (sound exposure level) and a distance-based No-Observed-Adverse-Effects Level for moose and cannonfire. The risk characterization used a weight-of-evidence approach and concluded that risk to mule deer behavior from the missile firing was likely for a negligible number of deer, but that no risk to mule deer abundance and reproduction is expected.
C1 [Jones, Daniel S.; Efroymson, Rebecca A.; Hargrove, William W.] Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
[Suter, Glenn W., II] US EPA, Natl Ctr Environm Assessment, Cincinnati, OH 45268 USA.
[Pater, Larry L.] USA, Construct Engn Res Lab, Engn Res & Dev Ctr, Champaign, IL 61824 USA.
RP Efroymson, RA (reprint author), Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
EM efroymsonra@ornl.gov
OI Efroymson, Rebecca/0000-0002-3190-880X
FU U. S. Department of Defense Strategic Environmental Research and
Development Program (SERDP) [CS-1054]; A Risk Assessment Framework for
Natural Resources on Military Training and Testing Lands; Oak Ridge
National Laboratory (ORNL); UT-Battelle; LLC; U. S. Department of Energy
[DE-AC05-00OR22725]
FX This research was funded by a contract from the U. S. Department of
Defense Strategic Environmental Research and Development Program (SERDP)
project CS-1054, A Risk Assessment Framework for Natural Resources on
Military Training and Testing Lands, to Oak Ridge National Laboratory
(ORNL), which is managed by UT-Battelle, LLC, for the U. S. Department
of Energy under contract DE-AC05-00OR22725. We thank Bob Holst and John
Hall for serving as project sponsors and Winifred Hodge Rose and Keturah
Reinbold of the U. S. Army Corps of Engineers Construction Engineering
Research Laboratory (CERL) for serving as Co-Principal Investigators. We
also acknowledge the contributors of data, guidance, manuals,
programming advice, text reviews, activity descriptions, and other
assistance: Valerie Morrill, Chuck Botdorf, and Junior Kerns from YPG
Environmental Sciences Division; Sergio Obregon, David McIntyre, and
Bruce Goff from Jason & Associates, YPG Office; Rick Douglas and Bert
Evans from YPG Aviation and Airdrop Systems; Dick Gebhart and Kim
Majerus from CERL; Todd Kuiken, Paul Hanson, and Robert Washington-Allen
from ORNL; and Catherine Stewart from the U. S. Army Center for Health
Promotion and Preventive Medicine.
NR 17
TC 0
Z9 0
U1 0
U2 7
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 530 WALNUT STREET, STE 850, PHILADELPHIA, PA 19106 USA
SN 1080-7039
EI 1549-7860
J9 HUM ECOL RISK ASSESS
JI Hum. Ecol. Risk Assess.
PY 2008
VL 14
IS 5
BP 898
EP 918
DI 10.1080/10807030802387507
PG 21
WC Biodiversity Conservation; Environmental Sciences
SC Biodiversity & Conservation; Environmental Sciences & Ecology
GA 378QC
UT WOS:000261338000004
ER
PT J
AU Peterson, MJ
Hargrove, WW
Efroymson, RA
AF Peterson, Mark J.
Hargrove, William W.
Efroymson, Rebecca A.
TI The Apache Longbow-Hellfire Missile Test at Yuma Proving Ground:
Ecological Risk Assessment for Tracked Vehicle Movement across Desert
Pavement
SO HUMAN AND ECOLOGICAL RISK ASSESSMENT
LA English
DT Article
DE ecological risk assessment; tracked vehicle; desert wash; desert
pavement; surface varnish; vegetation; water loss; soil disturbance
ID ALTITUDE AIRCRAFT OVERFLIGHTS; MOJAVE DESERT; SONORAN DESERT; ASSESSMENT
FRAMEWORK; SOIL; VEGETATION; PLANT; DISTURBANCE; CALIFORNIA; LANDSCAPE
AB A multiple stressor risk assessment was conducted at Yuma Proving Ground, Arizona, as a demonstration of the Military Ecological Risk Assessment Framework (MERAF). The focus was a testing program at Cibola Range that involved an Apache Longbow helicopter firing Hellfire missiles at moving targets, that is, M60-A1 tanks. This article describes the ecological risk assessment, using the MERAF, for the tracked vehicle movement component of the testing program. The principal stressor associated with tracked vehicle movement was soil disturbance, and a resulting, secondary stressor was hydrological change. Water loss to desert wash vegetation was hypothesized to result from increased infiltration and/or evaporation associated with vehicle disturbances to surrounding desert pavement, potentially affecting mule deer as well as vegetation. The simulated exposure of wash vegetation to water loss was quantified using estimates of disturbed land area from a digital orthogonal quarter quadrangle aerial photo and field observations, a 30-m digital elevation model, the flow accumulation feature of ESRI ArcInfo GIS, and a two-step runoff process dependent on soil characteristics and the extent of disturbance. In all simulated scenarios, the absolute amount of water lost increased with distance from the disturbance downslope in the washes; however, the percentage of water lost was greatest in land areas immediately downslope of a disturbance. Potential effects on growth and survival of desert wash trees were quantified by comparing water availability from the hydrologic model to water volume thresholds required for wash trees to survive and persist, derived from a local study. For both the incremental risk of the test program and for the combination of test and pretest disturbances, this demonstration of MERAF found no significant risk to either wash vegetation growth and survival or mule deer abundance and reproduction.
C1 [Peterson, Mark J.; Hargrove, William W.; Efroymson, Rebecca A.] Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
RP Peterson, MJ (reprint author), Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
EM petersonmj@ornl.gov
OI Efroymson, Rebecca/0000-0002-3190-880X
FU U. S. Department of Defense Strategic Environmental Research and
Development Program (SERDP) [CS-1054]; A Risk Assessment Framework for
Natural Resources on Military Training and Testing Lands; U. S.
Department of Energy [DE-AC05-00OR22725]
FX This research was funded by a contract from the U. S. Department of
Defense Strategic Environmental Research and Development Program (SERDP)
project CS-1054, A Risk Assessment Framework for Natural Resources on
Military Training and Testing Lands, to Oak Ridge National Laboratory,
which is managed by UT-Battelle, LLC, for the U. S. Department of Energy
under contract DE-AC05-00OR22725. We thank Bob Holst and John Hall for
serving as project sponsors. We also acknowledge the contributions of
the following people for data, guidance, manuals, programming advice,
text reviews, activity descriptions, and other assistance: Valerie
Morrill, Chuck Botdorf, and Junior Kerns from the Yuma Proving Ground
Environmental Sciences Division; Sergio Obregon, David McIntyre, and
Bruce Goff from Jason & Associates, Yuma Proving Ground Office; Rick
Douglas and Bert Evans from Yuma Proving Ground Aviation and Airdrop
Systems; Dick Gebhart and Kim Majerus from the U. S. Army Corps of
Engineers Construction Engineering Research Laboratory; and Todd Kuiken,
Robert Washington-Allen, and S. Marshall Adams from Oak Ridge National
Laboratory. Lastly, we acknowledge and thank the many people who
conducted and reported field study results at YPG, without which we
would not have been able to conduct this risk assessment.
NR 49
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U1 0
U2 7
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 1080-7039
J9 HUM ECOL RISK ASSESS
JI Hum. Ecol. Risk Assess.
PY 2008
VL 14
IS 5
BP 919
EP 946
DI 10.1080/10807030802387531
PG 28
WC Biodiversity Conservation; Environmental Sciences
SC Biodiversity & Conservation; Environmental Sciences & Ecology
GA 378QC
UT WOS:000261338000005
ER
PT J
AU Crawford, DC
Peng, Z
Cheng, JF
Boffelli, D
Ahearn, M
Nguyen, D
Shaffer, T
Yi, Q
Livingston, RJ
Rieder, MJ
Nickerson, DA
AF Crawford, Dana C.
Peng, Ze
Cheng, Jan-Fang
Boffelli, Dario
Ahearn, Magdalena
Nguyen, Dan
Shaffer, Tristan
Yi, Qian
Livingston, Robert J.
Rieder, Mark J.
Nickerson, Deborah A.
TI LPA and PLG sequence variation and kringle IV-2 copy number in two
populations
SO HUMAN HEREDITY
LA English
DT Article
DE African-American; apo(a); kringle; Lp(a); plasminogen; sequencing;
linkage disequilibrium
ID SINGLE-NUCLEOTIDE POLYMORPHISMS; CORONARY-ARTERY-DISEASE; PLASMA
LIPOPROTEIN(A) CONCENTRATIONS; APOLIPOPROTEIN(A) SIZE POLYMORPHISM;
LP(A) GLYCOPROTEIN PHENOTYPES; AFRICAN-AMERICANS;
LINKAGE-DISEQUILIBRIUM; HUMAN GENOME; APO(A) GENE; BIOLOGICAL
VARIABILITY
AB Background/Aims: Lp(a) levels have long been recognized as a potential risk factor for coronary heart disease that is almost completely under genetic control. Much of the genetics impacting Lp(a) levels has been attributed to the highly polymorphic LPA kringle IV-2 copy number variant, and most of the variance in Lp(a) levels in populations of European-descent is inversely correlated with kringle IV copy number. However, less of the variance is explained in African-descent populations for the same structural variation. African-descent populations have, on average, higher levels of Lp(a), suggesting other genetic factors contribute to Lp(a) level variability across populations. Methods: To identify potential cis-acting factors, we resequenced the gene LPA for single nucleotide polymorphism (SNP) discovery in 23 European-Americans and 24 African-Americans. We also resequenced the neighboring gene plasminogen (PLG) and genotyped the kringle IV copy number variant in the same reference samples. Results: These data are the most comprehensive description of sequence variation in LPA and its relationship with the kringle IV copy number variant. With these data, we demonstrate that only a fraction of LPA sequence diversity has been previously documented. Also, we identify several high frequency SNPs present in the African-American sample but absent in the European-American sample. Finally, we show that SNPs within PLG are not in linkage disequilibrium with SNPs in LPA, and we show that kringle IV copy number variation is not in linkage disequilibrium with either LPA or PLG SNPs. Conclusions: Together, these data suggest that LPA SNPs could independently contribute to Lp(a) levels in the general population. Copyright (C) 2008 S. Karger AG, Basel.
C1 [Crawford, Dana C.] Vanderbilt Univ, Dept Mol Physiol & Biophys, Ctr Human Genet Res, Nashville, TN 37232 USA.
[Peng, Ze; Cheng, Jan-Fang; Boffelli, Dario] Lawrence Berkeley Natl Lab, Genom Div, Berkeley, CA USA.
[Peng, Ze; Cheng, Jan-Fang; Boffelli, Dario] Lawrence Berkeley Natl Lab, Joint Genome Inst, Berkeley, CA USA.
[Ahearn, Magdalena; Nguyen, Dan; Shaffer, Tristan; Yi, Qian; Livingston, Robert J.; Rieder, Mark J.; Nickerson, Deborah A.] Univ Washington, Dept Genome Sci, Seattle, WA 98195 USA.
RP Crawford, DC (reprint author), Vanderbilt Univ, Dept Mol Physiol & Biophys, Ctr Human Genet Res, 515B Light Hall,2215 Garland Ave, Nashville, TN 37232 USA.
EM crawford@chgr.mc.vanderbilt.edu
RI Crawford, Dana/C-1054-2012
FU National Heart, Lung, and Blood Institute's Program for Genomic
Applications [U01 HL66682, U01 HL66728]; National Institute of
Environmental Health Science's Environmental Genome Project [N01
ES15478]
FX We thank Dr. Mark Wurfel and Jeanna Strout (University of Washington)
for maintaining the cell lines used in the kringle genotyping. This work
was funded by grants from the National Heart, Lung, and Blood
Institute's Program for Genomic Applications (U01 HL66682 and U01
HL66728) and the National Institute of Environmental Health Science's
Environmental Genome Project (N01 ES15478).
NR 77
TC 11
Z9 12
U1 0
U2 0
PU KARGER
PI BASEL
PA ALLSCHWILERSTRASSE 10, CH-4009 BASEL, SWITZERLAND
SN 0001-5652
J9 HUM HERED
JI Hum. Hered.
PY 2008
VL 66
IS 4
BP 199
EP 209
DI 10.1159/000143403
PG 11
WC Genetics & Heredity
SC Genetics & Heredity
GA 345GO
UT WOS:000258984500001
PM 18612205
ER
PT J
AU Wolfrum, EJ
Peterson, D
Kozubal, E
AF Wolfrum, Edward J.
Peterson, Darren
Kozubal, Eric
TI The volatile organic compound (VOC) removal performance of
desiccant-based dehumidification systems: Testing at sub-ppm VOC
concentrations
SO HVAC&R RESEARCH
LA English
DT Article
ID DESORPTION CHARACTERISTICS; POLLUTANTS; ADSORPTION; OZONE; AIR
AB We investigated the ability of a typical desiccant wheel to remove two common volatile organic compounds (VOCs), toluene and n-hexane, from an airstream at concentrations in the range 50-150 ppb. The effects of wheel speed, regeneration temperature, relative humidity, and VOC challenge concentration were examined. The desiccant wheel was able to transfer similar to 70% of the toluene and similar to 20% of the n-hexane from the process inlet stream to the regeneration outlet stream for the default process parameter settings. These removal efficiencies varied only slightly over the range of process parameters studied.
C1 [Wolfrum, Edward J.; Peterson, Darren; Kozubal, Eric] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Wolfrum, EJ (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA.
OI Wolfrum, Edward/0000-0002-7361-8931
NR 19
TC 6
Z9 6
U1 1
U2 5
PU AMER SOC HEATING REFRIGERATING AIR-CONDITIONING ENG, INC,
PI ATLANTA
PA 1791 TULLIE CIRCLE NE, ATLANTA, GA 30329 USA
SN 1078-9669
J9 HVAC&R RES
JI HVAC&R Res.
PD JAN
PY 2008
VL 14
IS 1
BP 129
EP 140
DI 10.1080/10789669.2008.10390998
PG 12
WC Thermodynamics; Construction & Building Technology; Engineering,
Mechanical
SC Thermodynamics; Construction & Building Technology; Engineering
GA 251EH
UT WOS:000252353600009
ER
PT B
AU Geballe, TB
Clayton, GC
Asplund, M
Herwig, F
Fryer, CL
AF Geballe, T. B.
Clayton, G. C.
Asplund, M.
Herwig, F.
Fryer, C. L.
BE Werner, K
Rauch, T
TI O-18 and the origins of HdC and R CrB stars
SO HYDROGEN-DEFICIENT STARS
SE Astronomical Society of the Pacific Conference Series
LA English
DT Proceedings Paper
CT 3rd International Workshop on Hydrogen-Deficient Stars
CY SEP 17-21, 2007
CL Tubingen, GERMANY
ID CORONAE-BOREALIS STARS; WHITE-DWARFS
AB We have detected enormously enhanced O-18 and correspondingly small values of O-16/O-18 in many hydrogen-deficient carbon (HdC) stars and R Coronae Borealis (R CrB) stars. The similar ratios suggest a common origin for the two types of stars. Of the two leading candidates for the origin of R. CrB stars, white dwarf mergers and final helium flashes., the former appears more likely to produce this and other observed isotopic anomalies.
C1 [Geballe, T. B.] Gemini Observ, 670 N Aohoku Pl, Hilo, HI 96720 USA.
[Clayton, G. C.] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA.
[Asplund, M.] Anglo Australian Observ, Sydney, NSW, Australia.
[Herwig, F.; Fryer, C. L.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Geballe, TB (reprint author), Gemini Observ, 670 N Aohoku Pl, Hilo, HI 96720 USA.
NR 5
TC 0
Z9 0
U1 0
U2 0
PU ASTRONOMICAL SOC PACIFIC
PI SAN FRANCISCO
PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA
BN 978-1-58381-652-3
J9 ASTR SOC P
PY 2008
VL 391
BP 51
EP +
PG 2
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA BIB01
UT WOS:000258025600010
ER
PT B
AU Diehl, S
Fryer, CL
Herwig, F
AF Diehl, Steven
Fryer, Chris L.
Herwig, Falk
BE Werner, K
Rauch, T
TI The formation of hydrogen deficient stars through common envelope
evolution
SO HYDROGEN-DEFICIENT STARS
SE Astronomical Society of the Pacific Conference Series
LA English
DT Proceedings Paper
CT 3rd International Workshop on Hydrogen-Deficient Stars
CY SEP 17-21, 2007
CL Tubingen, GERMANY
AB We present preliminary results from Smooth particle Hydrodynamics (SPH) simulations of common envelope evolution. We qualitatively compare the interaction between a 0.9 M-circle dot red giant with two different companion masses: a 0.05 M-circle dot brown dwarf and a 0.25 M-circle dot white dwarf companion.
C1 [Diehl, Steven; Fryer, Chris L.] Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
[Herwig, Falk] Keele Univ, Sch Phys & Geog Sci, Astrophys Grp, Keele, Staffs, England.
RP Diehl, S (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
NR 9
TC 3
Z9 3
U1 0
U2 0
PU ASTRONOMICAL SOC PACIFIC
PI SAN FRANCISCO
PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA
BN 978-1-58381-652-3
J9 ASTR SOC P
PY 2008
VL 391
BP 221
EP +
PG 2
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA BIB01
UT WOS:000258025600038
ER
PT B
AU Onifer, A
Heger, A
Abdallah, J
AF Onifer, Andrew
Heger, Alexander
Abdallah, Joseph
BE Werner, K
Rauch, T
TI The metallicity dependence of Wolf-Rayet, mass loss
SO HYDROGEN-DEFICIENT STARS
SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES
LA English
DT Proceedings Paper
CT 3rd International Workshop on Hydrogen-Deficient Stars
CY SEP 17-21, 2007
CL Tubingen, GERMANY
ID MODEL ATMOSPHERES; STARS; STELLAR; WINDS
AB We produce models of early WN, WC, and WO stars as a function of metallicity Z using an analytic CAK-type approach. At, log Z/Z(circle dot) >= -2 both WN and WC stars have the approximate dependence (M) over dot proportional to Z(0.5). For a WN wind the mass-loss rate drops rapidly below log Z/Z(circle dot) = -2, and no wind solution can be found for log Z/Z(circle dot) < -3. For WC and WO winds the mass-loss rate plummets in the range -3 <= log Z/Z(circle dot) <= -2 and tends to flatten due to the self-enrichment of C and O to around 10(-8) M-circle dot yr(-1) for log Z/Z(circle dot) <= -4. No significant difference in (M) over dot was found for WC versus WO stars at low metallicity.
C1 [Onifer, Andrew; Heger, Alexander; Abdallah, Joseph] Los Alamos Natl Lab, Los Alamos, NM 87544 USA.
RP Onifer, A (reprint author), Los Alamos Natl Lab, POB 1663,MS T087, Los Alamos, NM 87544 USA.
NR 9
TC 1
Z9 1
U1 0
U2 0
PU ASTRONOMICAL SOC PACIFIC
PI SAN FRANCISCO
PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA
BN 978-1-58381-652-3
J9 ASTR SOC P
PY 2008
VL 391
BP 305
EP 306
PG 2
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA BIB01
UT WOS:000258025600055
ER
PT B
AU Fryer, CL
Diehl, S
AF Fryer, Chris L.
Diehl, Steven
BE Werner, K
Rauch, T
TI On the road to understanding type Ia progenitors: Precision simulations
of double degenerate mergers
SO HYDROGEN-DEFICIENT STARS
SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES
LA English
DT Proceedings Paper
CT 3rd International Workshop on Hydrogen-Deficient Stars
CY SEP 17-21, 2007
CL Tubingen, GERMANY
ID DYNAMICAL MASS-TRANSFER; MERGING WHITE-DWARFS; GAMMA-RAY BURSTS;
BINARIES; STARS; COALESCENCE; SUPERNOVAE; EVOLUTION; CARBON
AB We review the current state of the art in double degenerate merger simulations to better understand the role this phenomenon plays in type la progenitors. Because the fate of a merged system may well. depend on the exact evolution of the matter temperature (as well as mixing of the merged system), precision simulations are required to determine the true late of these systems. Unfortunately, if we compare the results of current simulations, we find many-order of magnitude differences in quantities like mass-transfer rates in the merger process. We discuss these differences and outline an approach rising verification and validation that should allow Lis to achieve a level of precision sufficient to determine the true fate (thermonuclear vs. collapse) of double degenerate mergers. Understanding the fate of lower-mass systems (e.g. R Coronae Borealis stars) may be key in our final testing phase.
C1 [Fryer, Chris L.; Diehl, Steven] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Fryer, CL (reprint author), Los Alamos Natl Lab, CCS-2,MS D409, Los Alamos, NM 87545 USA.
NR 15
TC 9
Z9 9
U1 0
U2 0
PU ASTRONOMICAL SOC PACIFIC
PI SAN FRANCISCO
PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA
BN 978-1-58381-652-3
J9 ASTR SOC P
PY 2008
VL 391
BP 335
EP 345
PG 11
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA BIB01
UT WOS:000258025600059
ER
PT S
AU Hocevar, S
Summers, W
AF Hocevar, Stanko
Summers, William
BE Leon, A
TI Hydrogen Production
SO HYDROGEN TECHNOLOGY: MOBILE AND PORTABLE APPLICATIONS
SE Green Energy and Technology
LA English
DT Article; Book Chapter
ID SOLAR-CELL; FUEL-CELL; TECHNOLOGY; VEHICLES
C1 [Hocevar, Stanko] Natl Inst Chem, Lab Catalysis & Chem React Engn, SI-1000 Ljubljana, Slovenia.
[Summers, William] Savannah River Natl Lab, Dept Energy, Aiken, SC 29808 USA.
RP Hocevar, S (reprint author), Natl Inst Chem, Lab Catalysis & Chem React Engn, SI-1000 Ljubljana, Slovenia.
EM stanko.hocevar@ki.si; william.summers@srnl.doe.gov
NR 42
TC 16
Z9 16
U1 0
U2 0
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013, UNITED STATES
SN 1865-3529
BN 978-3-540-79027-3
J9 GREEN ENERGY TECHNOL
PY 2008
BP 15
EP 79
DI 10.1007/978-3-540-69925-5_2
PG 65
WC Energy & Fuels; Environmental Sciences; Environmental Studies;
Transportation Science & Technology
SC Energy & Fuels; Environmental Sciences & Ecology; Transportation
GA BJV89
UT WOS:000267285700003
ER
PT J
AU Hanrahan, TP
AF Hanrahan, Timothy P.
TI Effects of river discharge on hyporheic exchange flows in salmon
spawning areas of a large gravel-bed river
SO HYDROLOGICAL PROCESSES
LA English
DT Article
DE hyporheic exchange; gravel-bed rivers; temperature
ID SUBSURFACE WATER EXCHANGE; FALL CHINOOK SALMON; STREAMBED TOPOGRAPHY;
CONVECTIVE-TRANSPORT; TEMPERATURE DYNAMICS; SURFACE-TEMPERATURE;
NONSORBING SOLUTES; MOUNTAIN STREAMS; ATLANTIC SALMON; GROUNDWATER
AB The flow magnitude and timing from hydroelectric dams in the Snake River Basin of the Pacific north-western US is managed in part for the benefit of salmon. The objective of this research was to evaluate the effects of Hells Canyon Dam discharge operations on hydrologic exchange flows between the river and riverbed in Snake River fall Chinook salmon spawning areas. Interactions between river water and pore water within the upper 1 m of the riverbed were quantified through the use of self-contained temperature and water level data loggers suspended inside of piezometers. The data were recorded at 20 min intervals over a period of 200 days when the mean daily discharge was 218-605 m(3) s(-1), with hourly stage changes as large as 1.9 m. Differences in head pressure between the river and rivet-bed were small, often within +/- 2 cm. Measured temperature gradients in the riverbed indicated significant interactions between the surface and subsurface water. At the majority of sites, neither hydraulic not, temperature gradients were significantly affected by either short- or long-term changes in discharge operations from Hells Canyon Dam. Only 2 of 14 study sites exhibited acute flux reversals between the river and riverbed resulting from short-term, large magnitude changes in discharge. The findings suggest that local scale measurements may not be wholly explanatory of the hydrological exchange between the river and riverbed. The processes controlling surface water exchange at the Study sites are likely to be bedform-induced advective pumping, turbulence at the riverbed surface, and large-scale hydraulic gradients along the longitudinal profile of the riverbed. By incorporating the knowledge of hydrological exchange processes into water management planning, regional agencies will be better prepared to manage the limited water resources among competing priorities that include salmon recovery, flood control, irrigation supply, hydropower production, and recreation. Copyright (C) 2007 John Wiley & Sons, Ltd.
C1 Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Hanrahan, TP (reprint author), Pacific NW Natl Lab, POB 999,MS K6-85, Richland, WA 99352 USA.
EM tim.hanrahan@pnl.gov
NR 71
TC 17
Z9 18
U1 2
U2 18
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0885-6087
J9 HYDROL PROCESS
JI Hydrol. Process.
PD JAN 1
PY 2008
VL 22
IS 1
BP 127
EP 141
DI 10.1002/hyp.6605
PG 15
WC Water Resources
SC Water Resources
GA 253VD
UT WOS:000252544800011
ER
PT J
AU Commer, M
Newman, GA
Caraone, JJ
Dickens, TA
Green, KE
Wahrmund, LA
Willen, DE
Shiu, J
AF Commer, M.
Newman, G. A.
Caraone, J. J.
Dickens, T. A.
Green, K. E.
Wahrmund, L. A.
Willen, D. E.
Shiu, J.
TI Massively parallel electrical-conductivity imaging of hydrocarbons using
the IBM Blue Gene/L supercomputer
SO IBM JOURNAL OF RESEARCH AND DEVELOPMENT
LA English
DT Article
ID EXPLORATION
AB Large-scale controlled-source electromagnetic (CSEM) three-dimensional (3D) geophysical imaging is now receiving considerable attention for electrical-conductivity mapping of potential offshore oil and gas reservoirs. To cope with the typically large computational requirements of the 3D CSEM imaging problem, our strategies exploit computational parallelism and optimized finite-difference meshing. We report on an imaging experiment utilizing 32,768 tasks (and processors) on the IBM Blue Gene/L (TM) (BG/L) supercomputer at the IBM T. J. Watson Research Center. Over a 24-hour period, we were able to image a large-scale marine CSEM field dataset that previously required more than 4 months of computing time on distributed clusters utilizing 1,024 tasks on an InfiniBand((R)) fabric. The total initial data-fitting errors (i.e., "misfits") could be decreased by 67% within 72 completed inversion iterations, indicating the existence Of an electrically resistive region in the southern survey area below a depth of 1,500 m underneath the seafloor. The major part of the residual misfit stems from transmitter-parallel receiver components that have an offset from the transmitter sail line (broadside configuration). Modeling confirms that improved broadside data fits can be achieved by considering anisotropic electrical conductivities. While delivering a satisfactory gross-scale image for the depths of interest, the experiment provides important evidence,for the necessity of discriminating between horizontal and vertical conductivities for maximally consistent 3D CSEM inversions.
C1 [Commer, M.; Newman, G. A.] Lawrence Berkeley Natl Labs, Berkeley, CA 94720 USA.
[Caraone, J. J.; Dickens, T. A.; Green, K. E.; Wahrmund, L. A.; Willen, D. E.] ExxonMobil Upstream Res Co, Houston, TX 77252 USA.
[Shiu, J.] IBM Deep Comp Grp, Houston, TX 77056 USA.
RP Commer, M (reprint author), Lawrence Berkeley Natl Labs, Berkeley, CA 94720 USA.
EM MCommer@lbl.gor; ganewman@lbl.gov; jim.j.carazzone@exxonmobil.com;
tom.a.dickens@exxonmobil.com; ken.e.green@exxonmobil.com;
leslie.a.wahrmund@exxonmobil.com; denny.e.willen@exxonmobil.com;
jshiu@us.ibm.com
RI Commer, Michael/G-3350-2015
OI Commer, Michael/0000-0003-0015-9217
NR 15
TC 15
Z9 15
U1 0
U2 5
PU IBM CORP
PI ARMONK
PA 1 NEW ORCHARD ROAD, ARMONK, NY 10504 USA
SN 0018-8646
J9 IBM J RES DEV
JI IBM J. Res. Dev.
PD JAN-MAR
PY 2008
VL 52
IS 1-2
BP 93
EP 103
PG 11
WC Computer Science, Hardware & Architecture; Multidisciplinary Sciences
SC Computer Science; Science & Technology - Other Topics
GA 260MP
UT WOS:000253014700010
ER
PT J
AU Ethier, S
Tang, WM
Walkup, R
Oliker, L
AF Ethier, S.
Tang, W. M.
Walkup, R.
Oliker, L.
TI Large-scale gyrokinetic particle simulation of microturbulence in
magnetically confined fusion plasmas
SO IBM JOURNAL OF RESEARCH AND DEVELOPMENT
LA English
DT Article
ID GRADIENT-DRIVEN TURBULENCE; FINITE-SIZE PARTICLES; TOKAMAK TURBULENCE;
ZONAL FLOWS; TRANSPORT; EQUATIONS; ELECTRONS; WAVES
AB As the global energy economy makes the transition from fossil fuels toward cleaner alternatives, nuclear fusion becomes an attractive potential solution for satisfying growing needs. Fusion, the power source of the stars, has been the focus of active research since the early 1950s. While progress has been impressive-especially for magnetically confined plasma devices called tokamaks-the design of a practical power plant remains an outstanding challenge. A key topic of current interest is micro turbulence, which is believed to be responsible for the unacceptably large leakage of energy and particles out of the hot plasma core. Understanding and controlling this process is of utmost importance for operating current devices and designing future ones. In addressing such issues, the Gyrokinetic Toroidal Code (GTC) was developed to study the global influence of micro turbulence on particle and energy confinement. It has been optimized on the IBM Blue Gene/L (TM) (BG/L) computer, achieving essentially linear scaling on more than 30,000 processors. A full simulation of unprecedented phase-space resolution was carried out with 32,768 processors on the BGIL supercomputer located at the IBM T. J. Watson Research Center, providing new insights on the influence of collisions on microturbulence.
C1 [Ethier, S.; Tang, W. M.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
[Walkup, R.] IBM Corp, Div Res, Thomas J Watson Res Ctr, Yorktown Hts, NY 10598 USA.
[Oliker, L.] LBNL, Berkeley, CA 94720 USA.
RP Ethier, S (reprint author), Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA.
EM ethier@pppl.gov; tang@pppl.gov; walkup@us.ibm.com; oliker@lbl.gov
NR 34
TC 13
Z9 14
U1 1
U2 2
PU IBM CORP
PI ARMONK
PA 1 NEW ORCHARD ROAD, ARMONK, NY 10504 USA
SN 0018-8646
J9 IBM J RES DEV
JI IBM J. Res. Dev.
PD JAN-MAR
PY 2008
VL 52
IS 1-2
BP 105
EP 115
PG 11
WC Computer Science, Hardware & Architecture; Multidisciplinary Sciences
SC Computer Science; Science & Technology - Other Topics
GA 260MP
UT WOS:000253014700011
ER
PT J
AU Fisher, RT
Kadanoff, LP
Lamb, DQ
Dubey, A
Plewa, T
Calder, A
Cattaneo, F
Constantin, P
Foster, I
Papka, ME
Abarzhi, SI
Asida, SM
Rich, PM
Glendening, CC
Antypas, K
Sheeler, DJ
Reid, LB
Gallagher, B
Needham, SG
AF Fisher, R. T.
Kadanoff, L. P.
Lamb, D. Q.
Dubey, A.
Plewa, T.
Calder, A.
Cattaneo, F.
Constantin, P.
Foster, I.
Papka, M. E.
Abarzhi, S. I.
Asida, S. M.
Rich, P. M.
Glendening, C. C.
Antypas, K.
Sheeler, D. J.
Reid, L. B.
Gallagher, B.
Needham, S. G.
TI Terascale turbulence computation using the FLASH3 application framework
on the IBM Blue Gene/L system
SO IBM JOURNAL OF RESEARCH AND DEVELOPMENT
LA English
DT Article
ID DIRECT NUMERICAL SIMULATIONS; ADAPTIVE MESH REFINEMENT; HYDRODYNAMICS
AB Understanding the nature of turbulent flows remains one of the outstanding questions in classical physics. Significant progress has been recently made using computer simulation as an aid to our understanding of the rich physics qf turbulence. Here, we present both the computer science and the scientfic features of a unique terascale simulation of a weakly compressible turbulent flow that includes tracer particles. (Terascale refers to performance and dataset storage use in excess of a teraflop and terabyte, respectively.) The simulation was performed on the Lawrence Livermore National Laboratory IBM Blue Gene/L (TM) system, using version 3 of the FLASH application framework. FLASH3 is a modular, publicly available code designed primarily for astrophysical simulations, which scales well to massively parallel environments. We discuss issues related to the analysis and visualization of such a massive simulation and present initial scientific results. We also discuss challenges related to making the database available for public release. We suggest that widespread adoption of an open dataset model of high-performance computing is likely to result in signficant advantages for the scientific computing community, in much the same way that the widespread adoption of open-source software has produced similar gains over the last 10 years.
C1 [Fisher, R. T.; Lamb, D. Q.; Dubey, A.; Plewa, T.; Calder, A.; Cattaneo, F.; Papka, M. E.; Abarzhi, S. I.; Asida, S. M.; Rich, P. M.; Glendening, C. C.; Antypas, K.; Sheeler, D. J.; Reid, L. B.; Gallagher, B.; Needham, S. G.] Univ Chicago, DOE ASC Ctr Astrophys Thermonucl Flashes, Chicago, IL 60637 USA.
[Fisher, R. T.; Lamb, D. Q.; Dubey, A.; Plewa, T.; Calder, A.; Cattaneo, F.; Papka, M. E.; Abarzhi, S. I.; Asida, S. M.; Rich, P. M.; Glendening, C. C.; Antypas, K.; Sheeler, D. J.; Reid, L. B.; Gallagher, B.; Needham, S. G.] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA.
[Kadanoff, L. P.] Univ Chicago, Dept Phys, Chicago, IL 60637 USA.
[Kadanoff, L. P.; Constantin, P.] Univ Chicago, Dept Math, Chicago, IL 60637 USA.
[Foster, I.] Univ Chicago, Dept Comp Sci, Chicago, IL 60637 USA.
RP Fisher, RT (reprint author), Univ Chicago, DOE ASC Ctr Astrophys Thermonucl Flashes, Chicago, IL 60637 USA.
EM rtfisher@uchicago.edu; leop@uchicago.edu; lamb@oddjob.uchicago.edu;
dubey@flash.uchicago.edu; tomek@uchicago.edu;
acalder@mail.astro.sunysb.edu; cattaneo@flash.uchicago.edu;
const@cs.uchicago.edu; foster@mcs.anl.gov; papka@flash.uchicago.edu;
snezha@flash.uchicago.edu; sasida@phys.huji.ac.il;
richp@flash.uchicago.edu; chad@uchicago.edu; kantypas@lbl.dot.gov;
sheeler@flash.uchicago.edu; lynnreid@flash.uchicago.edu;
jbgallag@flash.uchicago.edu; shown@flash.uchicago.edu
RI Reid, Lynn/A-7364-2011; Plewa, Tomasz/C-1470-2010; Calder,
Alan/E-5348-2011; Fisher, Robert/J-8667-2014
OI Plewa, Tomasz/0000-0002-1762-2565; Fisher, Robert/0000-0001-8077-7255
NR 14
TC 27
Z9 27
U1 0
U2 3
PU IBM CORP
PI ARMONK
PA 1 NEW ORCHARD ROAD, ARMONK, NY 10504 USA
SN 0018-8646
J9 IBM J RES DEV
JI IBM J. Res. Dev.
PD JAN-MAR
PY 2008
VL 52
IS 1-2
BP 127
EP 136
PG 10
WC Computer Science, Hardware & Architecture; Multidisciplinary Sciences
SC Computer Science; Science & Technology - Other Topics
GA 260MP
UT WOS:000253014700013
ER
PT J
AU Vranas, P
Blumrich, MA
Chen, D
Gara, A
Giampapa, ME
Heidelberger, P
Salapura, V
Sexton, JC
Soltz, R
Bhanot, G
AF Vranas, P.
Blumrich, M. A.
Chen, D.
Gara, A.
Giampapa, M. E.
Heidelberger, P.
Salapura, V.
Sexton, J. C.
Soltz, R.
Bhanot, G.
TI Massively parallel quantum chromodynamics
SO IBM JOURNAL OF RESEARCH AND DEVELOPMENT
LA English
DT Article
AB Quantum chromodynamics (QCD), the theory of the strong nuclear force, can be numerically simulated on massively parallel supercomputers using the method of lattice gauge theory. We describe the special programming requirements of lattice QCD (LQCD) as well as the optimal supercomputer hardware architectures for which LQCD suggests a need. We demonstrate these methods on the IBM Blue Gene/L (TM) (BG/L) massively parallel supercomputer and argue that the BG/L architecture is very well suited for LQCD studies. This suitability arises from the fact that LQCD is a regular lattice discretization of space into lattice sites, while the BG/L supercomputer is a discretization of space into compute nodes. Both LQCD and the BG/L architecture are constrained by the requirement of short-distance exchanges. This simple relation is technologically important and theoretically intriguing. We demonstrate a computational speedup of LQCD using up to 131,072 CPUs on the largest BG/L supercomputer available in 2007. As the number of CPUs is increased, the speedup increases linearly with sustained performance of about 20% of the maximum possible hardware speed. This corresponds to a maximum of 70.5 sustained teraflops. At these speeds, LQCD and the BG/L supercomputer are able to produce theoretical results for the next generation of strong-interaction physics.
C1 [Vranas, P.; Soltz, R.] Lawrence Livermore Natl Lab, Phys & Adv Technol Directorate, Livermore, CA 94550 USA.
[Blumrich, M. A.; Chen, D.; Gara, A.; Giampapa, M. E.; Heidelberger, P.; Salapura, V.; Sexton, J. C.] IBM Corp, Div Res, Thomas J Watson Res Ctr, Yorktown Hts, NY 10598 USA.
[Bhanot, G.] Rutgers State Univ, Dept Biomed Engn, Piscataway, NJ 08855 USA.
RP Vranas, P (reprint author), Lawrence Livermore Natl Lab, Phys & Adv Technol Directorate, 7000 E Ave, Livermore, CA 94550 USA.
EM vranas1@llnl.gov; blumrich@us.ibm.com; chendong@us.ibm.com;
alangara@us.ibm.com; giampapa@us.ibm.com; philiph@us.ibm.com;
salapura@us.ibm.com; sextonjc@us.ibm.com; soltz@llnl.gov;
gyanbhanot@gmail.com
NR 15
TC 2
Z9 2
U1 0
U2 1
PU IBM CORP
PI ARMONK
PA 1 NEW ORCHARD ROAD, ARMONK, NY 10504 USA
SN 0018-8646
J9 IBM J RES DEV
JI IBM J. Res. Dev.
PD JAN-MAR
PY 2008
VL 52
IS 1-2
BP 189
EP 197
PG 9
WC Computer Science, Hardware & Architecture; Multidisciplinary Sciences
SC Computer Science; Science & Technology - Other Topics
GA 260MP
UT WOS:000253014700018
ER
PT S
AU Kolda, TG
Sun, JM
AF Kolda, Tamara G.
Sun, Jimeng
BA Giannotti, F
BF Giannotti, F
BE Gunopulos, D
Turini, F
Zaniolo, C
Ramakrishnan, N
Wu, XD
TI Scalable Tensor Decompositions for Multi-aspect Data Mining
SO ICDM 2008: EIGHTH IEEE INTERNATIONAL CONFERENCE ON DATA MINING,
PROCEEDINGS
SE IEEE International Conference on Data Mining
LA English
DT Proceedings Paper
CT 8th IEEE International Conference on Data Mining
CY DEC 15-19, 2008
CL Pisa, ITALY
SP IEEE, Yahoo Res, WIND, Microsoft, Ask com, IBM, Natl Sci Fdn, coop, BASE, Univ Pisa, Brite, Comune Pisa, Prov Pisa, Prov Lucca, Inst Sci & Tecnol Informazione, Consiglio Nazl Ric, GeoPKDD, Camera Commercia Pisa
ID ALGORITHMS
AB Modern applications such as Internet traffic, telecommunication records, and large-scale social networks generate massive amounts of data with multiple aspects and high dimensionalities. Tensors (i.e., multi-way arrays) provide a natural representation for such data. Consequently, tensor decompositions such as Tucker become important tools for summarization and analysis.
One major challenge is how to deal with high-dimensional, sparse data. In other words, how do we compute decompositions of tensors where most of the entries of the tensor are zero. Specialized techniques are needed for computing the Tucker decompositions for sparse tensors because standard algorithms do not account for the sparsity of the data. As a result, a surprising phenomenon is observed by practitioners: Despite the fact that them is enough memory to store both the input tensors and the factorized output tensors, memory overflows occur during the tensor factorization process. To address this intermediate blowup problem, we propose Memory-Efficient Tucker (MET). Based on the available memory, MET adaptively selects the right execution strategy during the decomposition, We provide quantitative and qualitative evaluation of MET on real tensors. It achieves over 1000X space reduction without sacrificing speed; it also allows us to work with much larger tensors that were too big to handle before. Finally, we demonstrate a. data mining case-study using MET.
C1 [Kolda, Tamara G.] Sandia Natl Labs, Livermore, CA 94550 USA.
[Sun, Jimeng] IBM Corp, TJ Watson Res Ctr, Armonk, NY 10504 USA.
RP Kolda, TG (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA.
EM tgkolda@sandia.gov; jimeng@us.ibm.com
RI Kolda, Tamara/B-1628-2009
OI Kolda, Tamara/0000-0003-4176-2493
NR 23
TC 58
Z9 58
U1 0
U2 5
PU IEEE COMPUTER SOC
PI LOS ALAMITOS
PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 USA
SN 1550-4786
BN 978-0-7695-3502-9
J9 IEEE DATA MINING
PY 2008
BP 363
EP +
DI 10.1109/ICDM.2008.89
PG 2
WC Computer Science, Artificial Intelligence; Computer Science, Information
Systems; Computer Science, Theory & Methods; Engineering, Electrical &
Electronic
SC Computer Science; Engineering
GA BJA60
UT WOS:000264173600037
ER
PT S
AU Oliner, AJ
Aiken, A
Stearley, J
AF Oliner, Adam J.
Aiken, Alex
Stearley, Jon
BA Giannotti, F
BF Giannotti, F
BE Gunopulos, D
Turini, F
Zaniolo, C
Ramakrishnan, N
Wu, XD
TI Alert Detection in System Logs
SO ICDM 2008: EIGHTH IEEE INTERNATIONAL CONFERENCE ON DATA MINING,
PROCEEDINGS
SE IEEE International Conference on Data Mining
LA English
DT Proceedings Paper
CT 8th IEEE International Conference on Data Mining
CY DEC 15-19, 2008
CL Pisa, ITALY
SP IEEE, Yahoo Res, WIND, Microsoft, Ask com, IBM, Natl Sci Fdn, coop, BASE, Univ Pisa, Brite, Comune Pisa, Prov Pisa, Prov Lucca, Inst Sci & Tecnol Informazione, Consiglio Nazl Ric, GeoPKDD, Camera Commercia Pisa
AB We present Nodeinfo, an unsupervised algorithm for anomaly detection in system logs. We demonstrate Nodeinfo's effectiveness on data from four of the world's most powerful supercomputers: using logs representing oiler 746 million processor-hours, in which anomalous events called alerts were manually tagged for scoring, we aim to automatically identify the regions of the log containing those alerts. We formalize the alert detection task in these terms, describe how Nodeinfo uses the information entropy of message terms to identify alerts, and present an online version of this algorithm, which is now in production use. This is the first work to investigate alert detection on (several) publicly-available supercomputer system logs, thereby providing a reproducible performance baseline.
C1 [Oliner, Adam J.; Aiken, Alex] Stanford Univ, Stanford, CA 94305 USA.
[Stearley, Jon] Sandia Natl Labs, Albuquerque, NM 87111 USA.
RP Oliner, AJ (reprint author), Stanford Univ, Stanford, CA 94305 USA.
EM oliner@cs.stanford.edu; aiken@cs.stanford.edu; jrstear@sandia.gov
FU U.S Department of Energy High PerformanceComputer Science Fellowship;
Sandia is a multiprogram laboratory operated; Sandia Corporation, a
Lockheed Martin Company; United States Department of Energy
[DE-AC04-94AL85000]
FX Work was funded in part by the U.S. Department of Energy High
PerformanceComputer Science Fellowship.Sandia is a multiprogram
laboratory operated by Sandia Corporation, a Lockheed Martin Company,
for the United States Department of Energy under Contract
DE-AC04-94AL85000.
NR 19
TC 9
Z9 9
U1 0
U2 0
PU IEEE COMPUTER SOC
PI LOS ALAMITOS
PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 USA
SN 1550-4786
BN 978-0-7695-3502-9
J9 IEEE DATA MINING
PY 2008
BP 959
EP +
DI 10.1109/ICDM.2008.132
PG 2
WC Computer Science, Artificial Intelligence; Computer Science, Information
Systems; Computer Science, Theory & Methods; Engineering, Electrical &
Electronic
SC Computer Science; Engineering
GA BJA60
UT WOS:000264173600114
ER
PT S
AU Derr, K
Manic, M
AF Derr, Kurt
Manic, Milos
GP ICIEA
TI Wireless based object tracking based on neural networks
SO ICIEA 2008: 3RD IEEE CONFERENCE ON INDUSTRIAL ELECTRONICS AND
APPLICATIONS, PROCEEDINGS, VOLS 1-3
SE IEEE Conference on Industrial Electronics and Applications
LA English
DT Proceedings Paper
CT 3rd IEEE Conference on Industrial Electronics and Applications (ICIEA
2008)
CY JUN 03-05, 2008
CL Singapore, SINGAPORE
SP IEEE Ind Electron Chap, IEEE Ind Elect Soc, IEEE Control Syst Soc
DE RSS; localization; neural network; CPN; k-nearest neighbor; signature
recognition; GPS
AB Location Based Services (LBS), context aware applications, and people and object tracking depend on the ability to locate mobile devices, also known as localization, in the wireless landscape. Localization enables a diverse set of applications that include, but are not limited to, vehicle guidance in an industrial environment, security monitoring, self-guided tours, personalized communications services, resource tracking, mobile commerce services, guiding emergency workers during fire emergencies, habitat monitoring, environmental surveillance, and receiving alerts.
This paper presents a new neural network approach (LENSR) based on a competitive topological Counter Propagation Network (CPN) with k-nearest neighborhood vector mapping, for indoor location estimation based on received signal strength. The advantage of this approach is both speed and accuracy. The tested accuracy of the algorithm was 90.6% within I meter and 96.4% within 1.5 meters. Several approaches for location estimation using NVLAN technology were reviewed for comparison of results.
C1 [Derr, Kurt] Idaho Natl Lab, 2525 Freemont Ave, Idaho Falls, ID 83415 USA.
[Manic, Milos] Univ Idaho, Dept Comp Sci, Idaho Falls, ID 83402 USA.
RP Derr, K (reprint author), Idaho Natl Lab, 2525 Freemont Ave, Idaho Falls, ID 83415 USA.
EM derr5843@uidaho.edu; misko@uidaho.edu
NR 23
TC 13
Z9 13
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2156-2318
BN 978-1-4244-1718-6
J9 C IND ELECT APPL
PY 2008
BP 308
EP +
DI 10.1109/ICIEA.2008.4582530
PG 2
WC Automation & Control Systems; Engineering, Industrial; Engineering,
Electrical & Electronic
SC Automation & Control Systems; Engineering
GA BIC09
UT WOS:000258323800062
ER
PT B
AU Lacy, JM
Novascone, SR
Richins, WD
Larson, TK
AF Lacy, J. M.
Novascone, S. R.
Richins, W. D.
Larson, T. K.
GP ASME
TI A METHOD FOR SELECTING SOFTWARE FOR DYNAMIC EVENT ANALYSIS II: THE
TAYLOR ANVIL AND DYNAMIC BRAZILIAN TESTS
SO ICONE 16: PROCEEDING OF THE 16TH INTERNATIONAL CONFERENCE ON NUCLEAR
ENGINEERING - 2008, VOL 4
LA English
DT Proceedings Paper
CT 16th International Conference on Nuclear Engineering
CY MAY 11-15, 2008
CL Orlando, FL
SP ASME, Nucl Engn Div, JSME, Japan Soc Mech Engineers
AB New nuclear power reactor designs will require resistance to a variety of possible malevolent attacks as well as traditional dynamic accident scenarios. The design/analysis team may be faced with a broad range of phenomena including air and ground blasts, high-velocity penetrators or shaped charges, and vehicle or aircraft impacts. With a host of software tools available to address these high-energy events, the analysis team must evaluate and select the software most appropriate for their particular set of problems. The accuracy of the selected software should then be validated with respect to the phenomena governing the interaction of the threat and structure.
Several software codes are available for the study of blast, impact, and other shock phenomena. At the Idaho National Laboratory (INL), a study is underway to investigate the comparative characteristics of a group of shock and high-strain rate physics codes including ABAQUS, LS-DYNA, CTH, ALEGRA, ALE3D, AUTODYN, and RADIOSS.
In part I of this report published in 2007, a series of five benchmark problems to exercise some important capabilities of the subject software was identified. The benchmark problems selected are a Taylor cylinder test, a split Hopkinson pressure bar test, a free air blast, the dynamic splitting tension (Brazilian) test, and projectile penetration of a concrete slab. Part II-- this paper-- reports the results of two of the benchmark problems: the Taylor cylinder and the dynamic Brazilian test.
The Taylor cylinder test is a method to determine the dynamic yield properties of materials. The test specimen is a right circular cylinder which is impacted against a theoretically rigid target. The cylinder deforms upon impact, with the final shape depending upon the specimen density, the impact velocity, and the dynamic yield stress, in turn a function of strain and strain rate.
The splitting tension test, or Brazilian test, is a method to measure the tensile strength of concrete using a cylindrical specimen. The specimen is loaded diametrically in compression, producing a fracture at the center of the specimen that propagates toward the loading points until the cylinder is split. To generate a dynamic load, different methods such as a drop-weight or a split Hopkinson pressure bar are employed.
The Taylor anvil and dynamic Brazilian test analyses are presented, including discussion of the analysis approach for each of the five subject software packages and two vendor submittals; comparison of results both among the codes and to physical test results; and conclusions as to the applicability of the subject codes to these two problems. Studies of the remaining three benchmark problems and overall conclusions will be presented in future publications.
C1 [Lacy, J. M.; Novascone, S. R.; Richins, W. D.] Idaho Natl Lab, Dept Appl Mech, Idaho Falls, ID 83415 USA.
RP Lacy, JM (reprint author), Idaho Natl Lab, Dept Appl Mech, Idaho Falls, ID 83415 USA.
NR 17
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 978-0-791-84817-3
PY 2008
BP 261
EP 270
PG 10
WC Energy & Fuels; Engineering, Civil; Engineering, Mechanical; Physics,
Nuclear
SC Energy & Fuels; Engineering; Physics
GA BIM15
UT WOS:000260672200032
ER
PT B
AU Stanley, CJ
Marshall, FM
AF Stanley, Clifford J.
Marshall, Frances M.
GP ASME
TI ADVANCED TEST REACTOR - A NATIONAL SCIENTIFIC USER FACILITY
SO ICONE 16: PROCEEDING OF THE 16TH INTERNATIONAL CONFERENCE ON NUCLEAR
ENGINEERING - 2008, VOL 4
LA English
DT Proceedings Paper
CT 16th International Conference on Nuclear Engineering
CY MAY 11-15, 2008
CL Orlando, FL
SP ASME, Nucl Engn Div, JSME, Japan Soc Mech Engineers
AB This presentation and associated paper provides an overview of the research and irradiation capabilities of the Advanced Test Reactor (ATR) located at the U.S. Department of Energy Idaho National Laboratory (INL). The ATR which has been designated by DOE as a National Scientific User Facility (NSUF) is operated by Battelle Energy Alliance, LLC. This paper will describe the ATR and discuss the research opportunities for university (faculty and students) and industry researchers to use this unique facility for nuclear fuels and materials experiments in support of advanced reactor development and life extension issues for currently operating nuclear reactors.
The ATR is a pressurized, light-water moderated and cooled, beryllium-reflected nuclear research reactor with a maximum operating power of 250 MWth. The unique serpentine configuration (Fig. 1) of the fuel elements creates five main reactor power lobes (regions) and nine flux traps. In addition to these nine flux traps there are 68 additional irradiation positions in the reactor core reflector tank. There are also 34 low-flux irradiation positions in the irradiation tanks outside the core reflector tank.
The ATR is designed to provide a test environment for the evaluation of the effects of intense radiation (neutron and gamma). Due to the unique serpentine core design each of the five lobes can be operated at different powers and controlled independently. Options exist for the individual test trains and assemblies to be either cooled by the ATR coolant (i.e., exposed to ATR coolant flow rates, pressures, temperatures, and neutron flux) or to be installed in their own independent test loops where such parameters as temperature, pressure, flow rate, neutron flux, and chemistry can be controlled per experimenter specifications. The full-power maximum thermal neutron flux is similar to 1.0 x 10(15) n/cm(2)-sec with a maximum fast flux of similar to 5.0 x 10(14) n/cm(2)-sec.
C1 [Stanley, Clifford J.] Idaho Natl Lab, Irradiat Test Programs, ATR Nucl Engn, Idaho Falls, ID 83415 USA.
RP Stanley, CJ (reprint author), Idaho Natl Lab, Irradiat Test Programs, ATR Nucl Engn, POB 1625,MS-7136, Idaho Falls, ID 83415 USA.
NR 4
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 978-0-791-84817-3
PY 2008
BP 367
EP 372
PG 6
WC Energy & Fuels; Engineering, Civil; Engineering, Mechanical; Physics,
Nuclear
SC Energy & Fuels; Engineering; Physics
GA BIM15
UT WOS:000260672200045
ER
PT B
AU Oh, CH
Kim, ES
Sherman, S
AF Oh, Chang H.
Kim, Eung Soo
Sherman, Steven
GP ASME
TI STRESS ANALYSES OF INTERMEDIATE HEAT TRANSFER LOOP
SO ICONE 16: PROCEEDING OF THE 16TH INTERNATIONAL CONFERENCE ON NUCLEAR
ENGINEERING - 2008, VOL 4
LA English
DT Proceedings Paper
CT 16th International Conference on Nuclear Engineering
CY MAY 11-15, 2008
CL Orlando, FL
SP ASME, Nucl Engn Div, JSME, Japan Soc Mech Engineers
AB The Department of Energy and the Idaho National Laboratory are developing a Next Generation Nuclear Plant (NGNP) to serve as a demonstration of state-of-the-art nuclear technology. The purpose of the demonstration is two fold 1) efficient low cost energy generation and 2) hydrogen production. Although a next generation plant could be developed as a single-purpose facility dedicated to hydrogen production, early designs are expected to be dual purpose. While hydrogen production and advanced energy cycles are still in its early stages of development, research towards coupling a high temperature reactor with electrical generation and hydrogen production is under way. Many aspects of the NGNP must be researched and developed in order to make recommendations on the final design of the plant. Parameters such as working conditions, cycle components, working fluids, and power conversion unit configurations must be understood.
A number of configurations of the power conversion unit were demonstrated in this study. An intermediate heat transport loop for transporting process heat to a High Temperature Steam Electrolysis (HTSE) hydrogen production plant was used. Helium, CO2, and a 80% nitrogen, 20% helium mixture (by weight) were studied to determine the best working fluid in terms cycle efficiency and development cost. In each of these configurations the relative component sizes were estimated for the different working fluids. Parametric studies were carried out on reactor outlet temperature, mass flow, pressure, and turbine cooling. Recommendations on the optimal working fluid for each configuration were made.
Engineering analyses were performed for several configurations of the intermediate heat transport loop that transfers heat from the nuclear reactor to the hydrogen production plant. The analyses evaluated parallel and concentric piping arrangements and two different working fluids, including helium and a liquid salt. The thermal-hydraulic analyses determined the size and insulation requirements for the hot and cold leg pipes in the different configurations. Mechanical analyses were performed to determine hoop stresses and thermal expansion characteristics for the different configurations.
C1 [Oh, Chang H.; Kim, Eung Soo] Idaho Natl Lab, Idaho Falls, ID 83415 USA.
RP Oh, CH (reprint author), Idaho Natl Lab, Idaho Falls, ID 83415 USA.
NR 9
TC 0
Z9 0
U1 2
U2 3
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-791-84817-3
PY 2008
BP 445
EP 451
PG 7
WC Energy & Fuels; Engineering, Civil; Engineering, Mechanical; Physics,
Nuclear
SC Energy & Fuels; Engineering; Physics
GA BIM15
UT WOS:000260672200055
ER
PT B
AU Naus, DJ
Mattus, CH
Dole, LR
Graves, HL
AF Naus, Dan J.
Mattus, Catherine H.
Dole, Leslie R.
Graves, Herman L., III
GP ASME
TI PHOSPHATE IONS - DOES EXPOSURE LEAD TO DEGRADATION OF CEMENTITIOUS
MATERIALS?
SO ICONE16: PROCEEDING OF THE 16TH INTERNATIONAL CONFERENCE ON NUCLEAR
ENGINEERING - 2008, VOL 1
LA English
DT Proceedings Paper
CT 16th International Conference on Nuclear Engineering
CY MAY 11-15, 2008
CL Orlando, FL
SP ASME, Nucl Engn Div, JSME, Japan Soc Mech Engineers
ID CALCIUM-PHOSPHATE; PRECIPITATION
AB An assessment of the potential effects of phosphate ions on cementitious materials was made through a review of the literature, contacts with concrete research personnel, and conduct of a "bench-scale" laboratory investigation [1]. The objectives of this limited study were to: (1) review the potential for degradation of cementitious materials due to exposure to high concentrations of phosphate ions; (2) provide an improved understanding of any significant factors that may lead to a requirement to establish exposure limits for concrete structures exposed to soils or ground waters containing high levels of phosphate ions; (3) recommend, as appropriate, whether a limitation on phosphate ion concentration in soils or ground water is required to avoid degradation of concrete structures; and (4) provide a "primer" on factors that can affect the durability of concrete materials and structures in nuclear power plants. Results of a literature review, contacts with industry personnel, and a laboratory investigation indicate that no harmful interactions occur between phosphate ions and cementitious materials unless phosphates are present in form of phosphoric acid. Relative to the "primer," NUREG/CR-6927, published in February 2007, provides a review of pertinent factors that can affect the durability of nuclear power plant reinforced concrete structures.
C1 [Naus, Dan J.; Mattus, Catherine H.; Dole, Leslie R.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Naus, DJ (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RI Mattus, Catherine/E-5591-2017
OI Mattus, Catherine/0000-0002-4574-1588
NR 10
TC 0
Z9 0
U1 0
U2 2
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-79184-814-2
PY 2008
BP 415
EP 421
PG 7
WC Energy & Fuels; Engineering, Civil; Engineering, Mechanical; Physics,
Nuclear
SC Energy & Fuels; Engineering; Physics
GA BIM73
UT WOS:000260914700049
ER
PT B
AU Wilde, TS
Holmes, RA
Sandquist, GM
AF Wilde, Taunia S.
Holmes, Richard A.
Sandquist, Gary M.
GP ASME
TI REVIEW OF QUALITY ASSURANCE FOR CMRR AT LANL
SO ICONE16: PROCEEDING OF THE 16TH INTERNATIONAL CONFERENCE ON NUCLEAR
ENGINEERING - 2008, VOL 1
LA English
DT Proceedings Paper
CT 16th International Conference on Nuclear Engineering
CY MAY 11-15, 2008
CL Orlando, FL
SP ASME, Nucl Engn Div, JSME, Japan Soc Mech Engineers
DE CMRR; LANL; nuclear; weapons; defense; quality assurance; DOE O 414; 10
CFR 830; and ASME NQA-1
AB The Chemistry and Metallurgy Research Replacement (CMRR) Project under development at Los Alamos National Laboratory is being executed under a variety of Quality Assurance Requirements, DOE Orders, and CFR Regulations for the design, construction, and testing of all physical aspects of the CMRR Project. This unique US Nuclear Defense Project is the most significant new nuclear weapons infrastructure development since inception of the Manhattan Engineering District Program in the 1940's. Those unclassified aspects of QA requirements and procedures implemented for this major project arc presented and assessed for meeting the demanding requirements imposed to ensure safety, reliability, and success of this vital facility to secure US Nuclear Defense in the 21st century.
C1 [Wilde, Taunia S.; Holmes, Richard A.] Los Alamos Natl Lab, Los Alamos, NM 87544 USA.
RP Wilde, TS (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87544 USA.
EM twilde@lanl.gov; raholmes@lanl.qov; gms@asp-llc.com
NR 5
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 978-0-79184-814-2
PY 2008
BP 939
EP 946
PG 8
WC Energy & Fuels; Engineering, Civil; Engineering, Mechanical; Physics,
Nuclear
SC Energy & Fuels; Engineering; Physics
GA BIM73
UT WOS:000260914700113
ER
PT B
AU Wilde, T
Baker, S
Sandquist, GM
AF Wilde, Taunia
Baker, Shannan
Sandquist, Gary M.
GP ASME
TI CODES, STANDARDS AND REGULATORY TOPICS FOR NUCLEAR FACILITIES
SO ICONE16: PROCEEDING OF THE 16TH INTERNATIONAL CONFERENCE ON NUCLEAR
ENGINEERING - 2008, VOL 1
LA English
DT Proceedings Paper
CT 16th International Conference on Nuclear Engineering
CY MAY 11-15, 2008
CL Orlando, FL
SP ASME, Nucl Engn Div, JSME, Japan Soc Mech Engineers
DE NRC; DOE; DOD; ASME; NQA-1; QA; QC
AB The design, construction, operation, maintenance, and decommissioning and decontamination of nuclear infrastructure particularly nuclear power plants licensed in the US by the US Nuclear Regulatory Commission (NRC) or operated by the US Department of Energy (DOE) or the US Department of Defense (DOD) must be executed under a rigorous and documented quality assurance program that provides adequate quality control and oversight. Those codes, standards, and orders regulate, document and prescribe the essentials for quality assurance (QA) and quality control (QC) that frequently impact nuclear facilities operated in the US are reviewed and compared.
C1 [Wilde, Taunia; Baker, Shannan] Los Alamos Natl Lab, Los Alamos, NM USA.
RP Wilde, T (reprint author), Los Alamos Natl Lab, Los Alamos, NM USA.
EM twilde@lanl.gov; sbaker@lanl.gov; gms@asp-llc.com
NR 4
TC 0
Z9 0
U1 0
U2 1
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-79184-814-2
PY 2008
BP 957
EP 961
PG 5
WC Energy & Fuels; Engineering, Civil; Engineering, Mechanical; Physics,
Nuclear
SC Energy & Fuels; Engineering; Physics
GA BIM73
UT WOS:000260914700115
ER
PT B
AU Griffith, A
Boger, J
Perry, J
AF Griffith, Andrew
Boger, John
Perry, Jeffrey
GP ASME
TI THE ADVANCED FUEL CYCLE FACILITY (AFCF) ROLE IN THE GLOBAL NUCLEAR
ENERGY PARTNERSHIP
SO ICONE16: PROCEEDING OF THE 16TH INTERNATIONAL CONFERENCE ON NUCLEAR
ENGINEERING - 2008, VOL 2
LA English
DT Proceedings Paper
CT 16th International Conference on Nuclear Engineering
CY MAY 11-15, 2008
CL Orlando, FL
SP ASME, Nucl Engn Div, JSME, Japan Soc Mech Engineers
AB The Global Nuclear Energy Partnership (GNEP), launched in February, 2006, proposes to introduce used nuclear fuel recycling in the United States (U.S.) with improved proliferation-resistance and a more effective waste management approach. This program is evaluating ways to close the fuel cycle in a manner that introduces the most advanced technologies of today and builds on recent breakthroughs in U.S. national laboratories while drawing on international and industry partnerships. Central to moving this advanced fuel recycling technology from the laboratory to commercial implementation is the development and siting of three proposed GNEP facilities: the Consolidated Fuel Treatment Center (CFTC), the Advanced Burner Reactor (ABR), and the Advanced Fuel Cycle Facility (AFCF).
These three projects are envisioned to introduce used fuel separations, advanced fuel fabrication, and fast reactor technology in a manner that efficiently recycles material, produces the most energy out of the existing inventory of used fuel, and improves our ability to manage nuclear waste. The CFTC and ABR will depend on industry involvement and will not be covered by this paper. This paper will cover key considerations for the AFCF. The AFCF will provide the U.S. with the capabilities required to evaluate technologies that separate used fuel into reusable material and waste in a proliferation-resistant manner. The separations technology demonstration capability is coupled with a remote transmutation fuel fabrication demonstration capability in an integrated manner that demonstrates advanced safeguard technologies.
C1 [Griffith, Andrew; Boger, John] US DOE, Off Nucl Energy, Washington, DC USA.
RP Griffith, A (reprint author), US DOE, Off Nucl Energy, Washington, DC USA.
NR 3
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 978-0-7918-4815-9
PY 2008
BP 31
EP 40
PG 10
WC Engineering, Environmental; Engineering, Mechanical; Mechanics
SC Engineering; Mechanics
GA BIM74
UT WOS:000260915300005
ER
PT B
AU Bateman, KJ
Solbrig, CW
AF Bateman, Kenneth J.
Solbrig, Charles W.
GP ASME
TI USE OF SIMILARITY ANALYSIS ON EXPERIMENTS OF DIFFERENT SIZE TO PREDICT
CRITICAL COOLING RATES FOR LARGE CERAMIC WASTE FORMS
SO ICONE16: PROCEEDING OF THE 16TH INTERNATIONAL CONFERENCE ON NUCLEAR
ENGINEERING - 2008, VOL 2
LA English
DT Proceedings Paper
CT 16th International Conference on Nuclear Engineering
CY MAY 11-15, 2008
CL Orlando, FL
SP ASME, Nucl Engn Div, JSME, Japan Soc Mech Engineers
AB Ceramic waste forms (CWF) are produced to store fission products for the long term. They are cast into cylindrical shape at high temperature (925 degrees C). Rapid cooling of the product is desirable for product turnaround, but cooling has the potential to crack the coalesced product into many pieces due to thermal stress. This paper investigates the rapid-cooling process with a borosilicate-glass component of the CWF used as a surrogate. The critical cooling rate of formed cylinders (the rate which separates the damage from the no-damage region) has been determined. This paper extends previous experimental data and analysis to production temperature as a step in the extrapolation of the data to production CWF's. The glass solidifies in the range of 650 degrees C to 625 degrees C. The previous tests (7.8-cm diameter) were all run starting from a solid (625 degrees C or less) to provide a basis for the higher temperature cases. Thermal stress cannot build up until solidification begins to occur. The current tests (7.8 and 9.9cm diameter) were run from the liquid temperature of 925 degrees C.
A theoretical model has been developed to analyze the data. The model includes heat transfer and the stress developed from the thermal gradients. Similarity analysis based on this model is used to produce dimensionless charts which allow data of different initial temperatures and diameters to be analyzed.
The new data corroborated the previous estimate of the critical cooling rate and analytical-model projection for the minimum in-furnace cooling times for two production size CWF's that will be stored in Yucca Mountain (70 hours for the 52-cm diameter and 35 days for the 181.5-cm sizes). To further reduce these times, an analytical prediction was made which shows that the formed cylinder can be removed from a furnace at a temperature of 320 degrees C without any danger of cracking.
C1 [Bateman, Kenneth J.; Solbrig, Charles W.] Idaho Natl Lab, Fuel Cycle Programs Div, Idaho Falls, ID 83415 USA.
RP Bateman, KJ (reprint author), Idaho Natl Lab, Fuel Cycle Programs Div, Idaho Falls, ID 83415 USA.
NR 6
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 978-0-7918-4815-9
PY 2008
BP 41
EP 50
PG 10
WC Engineering, Environmental; Engineering, Mechanical; Mechanics
SC Engineering; Mechanics
GA BIM74
UT WOS:000260915300006
ER
PT B
AU Wahlquist, DL
Bateman, KJ
Westphal, BR
AF Wahlquist, Dennis L.
Bateman, Kenneth J.
Westphal, Brian R.
GP ASME
TI SECOND GENERATION EXPERIMENTAL EQUIPMENT DESIGN TO SUPPORT VOLOXIDATION
TESTING AT INL
SO ICONE16: PROCEEDING OF THE 16TH INTERNATIONAL CONFERENCE ON NUCLEAR
ENGINEERING - 2008, VOL 2
LA English
DT Proceedings Paper
CT 16th International Conference on Nuclear Engineering
CY MAY 11-15, 2008
CL Orlando, FL
SP ASME, Nucl Engn Div, JSME, Japan Soc Mech Engineers
AB Voloxidation is a potential process used to prepare fuel for spent-oxide-fuel treatment. The spent oxide fuel is heated to an elevated temperature in oxygen or air to promote separation of the fuel from the cladding. Low pressures are also required to enhance volatizing the fission products. The Idaho National Laboratory and the Korea Atomic Energy Research Institute have been collaborating on voloxidation research through a joint International Nuclear Energy Research Initiative project. The new high temperature multiple zone furnace and off-gas trapping system (OTS) are designed for remote operation in the Hot Fuel Examination Facility. The OTS is designed to handle vacuum, oxidizing environments, and high temperatures. Distinctive temperature zones of the furnace are used to selectively capture the fission products. Vacuum conditions at elevated temperatures are achieved by incorporating various metal seals. The OTS has proved durable under these aggressive operating conditions. A detailed description of the second generation furnace and OTS with enhanced capabilities will be presented.
C1 [Wahlquist, Dennis L.; Bateman, Kenneth J.; Westphal, Brian R.] Idaho Natl Lab, Idaho Falls, ID 83415 USA.
RP Wahlquist, DL (reprint author), Idaho Natl Lab, POB 1625, Idaho Falls, ID 83415 USA.
OI Wahlquist, Dennis/0000-0001-5182-5078
NR 10
TC 0
Z9 0
U1 0
U2 2
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-4815-9
PY 2008
BP 91
EP 97
PG 7
WC Engineering, Environmental; Engineering, Mechanical; Mechanics
SC Engineering; Mechanics
GA BIM74
UT WOS:000260915300012
ER
PT B
AU Pointer, WD
Tentner, A
Sofu, T
Lo, S
Splawski, A
AF Pointer, W. David
Tentner, Adrian
Sofu, Tanju
Lo, Simon
Splawski, Andrew
GP ASME
TI PREDICTION OF BOILING WATER REACTOR ASSEMBLY VOID DISTRIBUTIONS USING A
TWO-PHASE COMPUTATIONAL FLUID DYNAMICS MODEL
SO ICONE16: PROCEEDING OF THE 16TH INTERNATIONAL CONFERENCE ON NUCLEAR
ENGINEERING - 2008, VOL 2
LA English
DT Proceedings Paper
CT 16th International Conference on Nuclear Engineering
CY MAY 11-15, 2008
CL Orlando, FL
SP ASME, Nucl Engn Div, JSME, Japan Soc Mech Engineers
AB This paper presents recent results obtained as part of the on-going integral validation of an advanced Eulerian-Eulerian two-phase (E2P) computational fluid dynamics based boiling model that allows the detailed analysis of the two-phase flow and heat transfer phenomena in a Boiling Water Reactor (BWR) fuel assembly. The code is being developed as a customized module built on the foundation of the commercial CFD-code STAR-CD which provides general two-phase flow modeling capabilities.
Simulations of a prototypic BWR fuel assembly experiment have been completed as an initial assessment of the applicability of the E2P model to realistic BWR geometries and conditions. Initial validation has focused on comparison with measured sub-channel averaged data to enable the benchmarking of the accuracy of the E2P against the current predictive capabilities of the sub-channel methods. The paper will discuss the effects of modeling assumptions, assumed coefficient values and the computational mesh structure used to describe the fuel assembly geometry on the accuracy of the sub-channel averaged void fraction.
C1 [Pointer, W. David; Tentner, Adrian; Sofu, Tanju] Argonne Natl Lab, Argonne, IL 60439 USA.
RP Pointer, WD (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM pointer@anl.gov
OI Pointer, W. David/0000-0003-0946-7937
NR 11
TC 0
Z9 0
U1 0
U2 1
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-4815-9
PY 2008
BP 321
EP 329
PG 9
WC Engineering, Environmental; Engineering, Mechanical; Mechanics
SC Engineering; Mechanics
GA BIM74
UT WOS:000260915300039
ER
PT B
AU Riemke, RA
Davis, CB
Schultz, RR
AF Riemke, Richard A.
Davis, Cliff B.
Schultz, Richard R.
GP ASME
TI HEAT TRANSFER BOUNDARY CONDITIONS IN THE RELAP5-3D CODE
SO ICONE16: PROCEEDING OF THE 16TH INTERNATIONAL CONFERENCE ON NUCLEAR
ENGINEERING - 2008, VOL 3
LA English
DT Proceedings Paper
CT 16th International Conference on Nuclear Engineering
CY MAY 11-15, 2008
CL Orlando, FL
SP ASME, Nucl Engn Div, JSME, Japan Soc Mech Engineers
AB The heat transfer boundary conditions used in the RELAP5-3D computer program have evolved over the years. Currently, RELAP5-3D has the following options for the heat transfer boundary conditions: (a) heat transfer correlation package option, (b) non-convective option (from radiation/conduction enclosure model or symmetry/insulated conditions), and (c) other options (setting the surface temperature to a volume fraction averaged fluid temperature of the boundary volume, obtaining the surface temperature from a control variable, obtaining the surface temperature from a time-dependent general table, obtaining the heat flux from a time-dependent general table, or obtaining heat transfer coefficients front either a time- or temperature-dependent general table). These options will be discussed, including the more recent ones.
C1 [Riemke, Richard A.; Davis, Cliff B.; Schultz, Richard R.] Idaho Natl Lab, Idaho Falls, ID 83415 USA.
RP Riemke, RA (reprint author), Idaho Natl Lab, Idaho Falls, ID 83415 USA.
EM Richard.Riemke@inl.gov; Cliff.Davis@inl.gov; Richard.Schultz@inl.gov
NR 11
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 978-0-79184-816-6
PY 2008
BP 177
EP 181
PG 5
WC Automation & Control Systems; Instruments & Instrumentation; Mechanics
SC Automation & Control Systems; Instruments & Instrumentation; Mechanics
GA BIM75
UT WOS:000260916100020
ER
PT B
AU Tentner, A
Lo, S
Splawski, A
Ioilev, A
Melnikov, V
Samigulin, M
Ustinenko, V
Melnikova, S
AF Tentner, Adrian
Lo, Simon
Splawski, Andrew
Ioilev, Andrey
Melnikov, Vladimir
Samigulin, Maskhud
Ustinenko, Vasily
Melnikova, Sufia
GP ASME
TI COMPUTATIONAL FLUID DYNAMICS MODELING OF TWO-PHASE FLOW TOPOLOGIES IN A
BOILING WATER REACTOR FUEL ASSEMBLY
SO ICONE16: PROCEEDING OF THE 16TH INTERNATIONAL CONFERENCE ON NUCLEAR
ENGINEERING - 2008, VOL 3
LA English
DT Proceedings Paper
CT 16th International Conference on Nuclear Engineering
CY MAY 11-15, 2008
CL Orlando, FL
SP ASME, Nucl Engn Div, JSME, Japan Soc Mech Engineers
AB This paper presents recent advances in the development and validation of the two-phase flow topology models implemented in CFD-BWR, an advanced Computational Fluid Dynamics (CFD) computer code that allows the detailed analysis of the two-phase flow and heat transfer phenomena in Boiling Water Reactor (BWR) fuel assemblies under various operating conditions. The local inter-phase surface topology plays a central role in determining the mass, momentum, and energy exchanges between the liquid and vapor phases and between the two-phase coolant and the fuel pin cladding. The paper describes the topology map used to determine the local inter-phase surface topology and the role of the local topology in determining the inter-phase mass, momentum, and energy transfer. It discusses the relationship between the local interphase surface topology and the traditional channel flow regimes and presents results of experiment analyses in which computed local topologies are aggregated into flow regimes and compared with experimental observations.
C1 [Tentner, Adrian] Argonne Natl Lab, Argonne, IL 60439 USA.
RP Tentner, A (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
NR 13
TC 0
Z9 0
U1 0
U2 1
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-79184-816-6
PY 2008
BP 430
EP 440
PG 11
WC Automation & Control Systems; Instruments & Instrumentation; Mechanics
SC Automation & Control Systems; Instruments & Instrumentation; Mechanics
GA BIM75
UT WOS:000260916100049
ER
PT B
AU McCreery, GE
McIlroy, HM
Hamman, KD
Zhang, HB
AF McCreery, Glenn E.
McIlroy, Hugh M.
Hamman, Kurt D.
Zhang, Hongbin
GP ASME
TI DESIGN OF WIRE-WRAPPED ROD BUNDLE MATCHED INDEX-OF-REFRACTION
EXPERIMENTS
SO ICONE16: PROCEEDING OF THE 16TH INTERNATIONAL CONFERENCE ON NUCLEAR
ENGINEERING - 2008, VOL 3
LA English
DT Proceedings Paper
CT 16th International Conference on Nuclear Engineering
CY MAY 11-15, 2008
CL Orlando, FL
SP ASME, Nucl Engn Div, JSME, Japan Soc Mech Engineers
AB Experiments will be conducted in the Idaho National Laboratory (INL) Matched Index-of-Refraction (MIR) Flow Facility [1] to characterize the three-dimensional velocity and turbulence fields in a wire-wrapped rod bundle typically employed in liquid-metal cooled fast reactors and to provide benchmark data for computer code validation. Sodium cooled fast reactors are under consideration for use in the U.S. Department of Energy (DOE) Global Nuclear Energy Partnership (GNEP) program. The experiment model will be constructed of quartz components and the working fluid will be mineral oil. Accurate temperature control (to within +/- 0.05 degrees C) matches the index-of-refraction of mineral oil with that of quartz and renders the model transparent to the wavelength of laser light employed for optical measurements. The model will be a scaled 7-pin rod bundle enclosed in a hexagonal canister. Flow field measurements will be obtained with a LaVision 3-D particle image velocimeter (PIV) and complimented by near-wall velocity measurements obtained from a 2-D laser Doppler velocimeter (LDV). These measurements will be used as benchmark data for computational fluid dynamics (CFD) validation. The rod bundle model dimensions will be scaled up from the typical dimensions of a fast reactor fuel assembly to provide the maximum Reynolds number achievable in the MIR flow loop. A range of flows from laminar to fully-turbulent will be available with a maximum Reynolds number, based on bundle hydraulic diameter, of approximately 22,000. The fuel pins will be simulated by 85 mm diameter quartz tubes (closed on the inlet ends) and the wire-wrap will be simulated by 25 mm diameter quartz rods. The canister walls will be constructed from quartz plates. The model will be approximately 2.13 m in length. Bundle pressure losses will also be measured and the data recorded for code comparisons. The experiment design and preliminary CFD Calculations, which will be used to provide qualitative hydrodynamic information, are presented in this paper.
C1 [McCreery, Glenn E.; McIlroy, Hugh M.; Hamman, Kurt D.; Zhang, Hongbin] Idaho Natl Lab, Idaho Falls, ID 83415 USA.
RP McCreery, GE (reprint author), Idaho Natl Lab, Idaho Falls, ID 83415 USA.
EM Glenn.McCreery@inl.gov; Hugh.Mcilroy@inl.gov; Kurt.Hamman@inl.gov;
Hongbin.Zhang@inl.gov
NR 12
TC 0
Z9 0
U1 0
U2 3
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-79184-816-6
PY 2008
BP 595
EP 605
PG 11
WC Automation & Control Systems; Instruments & Instrumentation; Mechanics
SC Automation & Control Systems; Instruments & Instrumentation; Mechanics
GA BIM75
UT WOS:000260916100068
ER
PT B
AU McIlroy, HM
McEligot, DM
Pink, RJ
AF McIlroy, Hugh M., Jr.
McEligot, Donald M.
Pink, Robert J.
GP ASME
TI MEASUREMENT OF FLOW PHENOMENA IN A LOWER PLENUM MODEL OF A PRISMATIC
GAS-COOLED REACTOR
SO ICONE16: PROCEEDING OF THE 16TH INTERNATIONAL CONFERENCE ON NUCLEAR
ENGINEERING - 2008, VOL 3
LA English
DT Proceedings Paper
CT 16th International Conference on Nuclear Engineering
CY MAY 11-15, 2008
CL Orlando, FL
SP ASME, Nucl Engn Div, JSME, Japan Soc Mech Engineers
AB Mean-velocity-field and turbulence data arc presented that measure turbulent flow phenomena in an approximately 1:7 scale model of a region of the lower plenum of a typical prismatic gas-cooled reactor (GCR) similar to a General Atomics Gas-Turbine-Modular Helium Reactor (GTMHR) design. The data were obtained in the Matched-Index-of-Refraction (MIR) facility at Idaho National Laboratory (INL) and are offered for assessing computational fluid dynamics (CFD) software. This experiment has been selected as the first Standard Problem endorsed by the Generation IV International Forum.
Results concentrate oil the region of the lower plenum near its far reflector wall (away from the Outlet duct). The flow in the lower plenum consists of multiple jets injected into a confined cross flow - with obstructions. The model consists of a row of full circular posts along its centerline with half-posts on the two parallel walls to approximate geometry scaled to that expected from the staggered parallel rows of posts in the reactor design. The model is fabricated from clear, fused quartz to match the refractive-index of the working fluid so that optical techniques may be employed for the measurements. The benefit of the MIR technique is that it permits optical measurements to determine flow characteristics in complex passages in and around objects to be obtained without locating intrusive transducers that will disturb the flow field and without distortion of the optical paths. An advantage of the INL system is its large size, leading to improved spatial and temporal resolution compared to similar facilities at smaller scales. A three-dimensional (3-D) Particle Image Velocimetry (PIV) system was used to collect the data. Inlet jet Reynolds numbers (based on the jet diameter and the time-mean bulk velocity) are approximately 4,300 and 12,400. Uncertainty analyses and a discussion of the standard problem are included.
The measurements reveal developing, non-uniform, turbulent flow in the inlet jets and complicated flow patterns in the model lower plenum. Data include three-dimensional vector plots, data displays along the coordinate planes (slices) and presentations that describe the component flows at specific regions in the model. Information on inlet conditions is also presented.
C1 [McIlroy, Hugh M., Jr.; McEligot, Donald M.; Pink, Robert J.] Idaho Natl Lab, Idaho Falls, ID 83415 USA.
RP McIlroy, HM (reprint author), Idaho Natl Lab, POB 1625, Idaho Falls, ID 83415 USA.
NR 11
TC 0
Z9 0
U1 0
U2 2
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-79184-816-6
PY 2008
BP 783
EP 791
PG 9
WC Automation & Control Systems; Instruments & Instrumentation; Mechanics
SC Automation & Control Systems; Instruments & Instrumentation; Mechanics
GA BIM75
UT WOS:000260916100089
ER
PT B
AU Bronevetsky, G
de Supinski, BR
AF Bronevetsky, Greg
de Supinski, Bronis R.
GP ACM
TI Soft Error Vulnerability of Iterative Linear Algebra Methods
SO ICS'08: PROCEEDINGS OF THE 2008 ACM INTERNATIONAL CONFERENCE ON
SUPERCOMPUTING
LA English
DT Proceedings Paper
CT 22nd ACM International Conference on Supercomputing
CY JUN 07-12, 2006
CL Kos Isl, GREECE
SP ACM
DE fault tolerance; soft errors; parallel; iterative methods; linear
algebra
ID FAULT-TOLERANCE
AB Devices are increasingly vulnerable to soft errors as their feature sizes shrink. Previously, soft error rates were significant primarily in space and high-atmospheric computing. Modern architectures now use features so small at sufficiently low voltages that soft errors are becoming important even at terrestrial altitudes. Due to their large number of components, supercomputers are particularly susceptible to soft errors.
Since many large scale parallel scientific applications use iterative linear algebra methods, the soft error vulnerability of these methods constitutes a large fraction of the applications' overall vulnerability. Many users consider these methods invulnerable to most soft errors since they converge from an imprecise solution to a precise one. However, we show in this paper that iterative methods are vulnerable to soft errors, exhibiting both silent data corruptions and poor ability to detect errors. Further, we evaluate a variety of soft error detection and tolerance techniques, including checkpointing, linear matrix encodings, and residual tracking techniques.
C1 [Bronevetsky, Greg; de Supinski, Bronis R.] Lawrence Livermore Natl Lab, Ctr Appl Sci Comp, Livermore, CA 94551 USA.
RP Bronevetsky, G (reprint author), Lawrence Livermore Natl Lab, Ctr Appl Sci Comp, Livermore, CA 94551 USA.
EM bronevetsky1@llnl.gov; bronis@llnl.gov
NR 34
TC 31
Z9 31
U1 0
U2 1
PU ASSOC COMPUTING MACHINERY
PI NEW YORK
PA 1515 BROADWAY, NEW YORK, NY 10036-9998 USA
BN 978-1-60558-158-3
PY 2008
BP 155
EP 164
PG 10
WC Computer Science, Hardware & Architecture
SC Computer Science
GA BJI72
UT WOS:000266202400016
ER
PT B
AU Iancu, C
Chen, W
Yelick, K
AF Iancu, Costin
Chen, Wei
Yelick, Katherine
GP ACM
TI Performance Portable Optimizations for Loops Containing Communication
Operations
SO ICS'08: PROCEEDINGS OF THE 2008 ACM INTERNATIONAL CONFERENCE ON
SUPERCOMPUTING
LA English
DT Proceedings Paper
CT 22nd ACM International Conference on Supercomputing
CY JUN 07-12, 2006
CL Kos Isl, GREECE
SP ACM
DE Parallel Programming; Program Transformations; Performance Portability;
Communication Code Generation; Latency Hiding
AB Effective use of communication networks is critical to the performance and scalability of parallel applications. Partitioned Global Address Space languages like UPC bring the promise of performance and programmer productivity. Studies of well-tuned programs have suggested that PGAS languages are effective at utilizing modern networks because their one-sided communication is a good match to the underlying network hardware. An open question is whether the manual optimizations required to achieve good performance can be performed automatically by the compiler in a performance portable manner.
In this paper we present a compiler and runtime optimization framework for loops containing communication operations. Our framework performs compile time message vectorization and strip-mining and defers until runtime the selection of the actual communication operations. At runtime, the communication requirements of the program are analyzed, and communication is instantiated and scheduled based on highly tuned network and application performance models. The runtime analysis takes into account network flow control and quality-of-service restrictions, and it is able to select from a large class of available communication primitives the communication schedule best suited for the dynamic combination of input size and system parameters. The results indicate that our framework produces code that scales and performs better than that of manually optimized implementations. Our approach not only improves performance, but increases programmer productivity as well.
C1 [Iancu, Costin] Lawrence Berkeley Natl Lab, Berkeley, CA USA.
RP Iancu, C (reprint author), Lawrence Berkeley Natl Lab, Berkeley, CA USA.
EM cciancu@lbl.gov; wychen@cs.berkeley.edu; yelick@cs.berkeley.edu
NR 28
TC 1
Z9 1
U1 0
U2 0
PU ASSOC COMPUTING MACHINERY
PI NEW YORK
PA 1515 BROADWAY, NEW YORK, NY 10036-9998 USA
BN 978-1-60558-158-3
PY 2008
BP 266
EP 276
PG 11
WC Computer Science, Hardware & Architecture
SC Computer Science
GA BJI72
UT WOS:000266202400027
ER
PT B
AU Moazzeni, T
Jiang, YT
Ma, J
Li, N
AF Moazzeni, Taleb
Jiang, Yingtao
Ma, Jian
Li, Ning
BE Yuan, BZ
Ruan, QQ
Tang, XF
TI Algorithms for the Measurement of Liquid Metal Coolant Flow Velocity
with Correlated Thermal Signals
SO ICSP: 2008 9TH INTERNATIONAL CONFERENCE ON SIGNAL PROCESSING, VOLS 1-5,
PROCEEDINGS
LA English
DT Proceedings Paper
CT 9th International Conference on Signal Processing
CY OCT 26-29, 2008
CL Beijing, PEOPLES R CHINA
SP IEEE, Signal Proc Soc, IET, CIE, uRSi, IEEE Press
AB The flow velocity of liquid metal coolant can be determined through the measurements of temperature fluctuation recorded by a pair of temperature sensors placed certain distance apart along the flow. Traditionally, this was done using a cross-correlation algorithm to estimate the transit time of the coolant, and thus its velocity. This widely used cross-correlation algorithm, however, suffers from the ambiguity in reading of measurements. To alleviate this problem, the transfer function estimation approach was recently proposed which tends to give more accurate results. In this paper, we introduce a new algorithm that can further improve the accuracy in the transit time estimation using an adaptive inverse system model at a higher cost of computation. When real-time computation is a concern, we propose a second algorithm based on an adaptive filtering approach which makes a sound trade-off between accuracy and computation cost. This algorithm incurs less processing time than the first proposed algorithm with higher accuracy than the two aforementioned conventional algorithms.
C1 [Moazzeni, Taleb; Jiang, Yingtao] Univ Nevada, Dept Elect & Comp Engn, Las Vegas, NV 89154 USA.
[Ma, Jian] Univ Nevada, Dept Mech Engn, Las Vegas, NV 89557 USA.
[Li, Ning] Los Alamos Natl Lab, Dept Energy, Los Alamos, NM USA.
RP Moazzeni, T (reprint author), Univ Nevada, Dept Elect & Comp Engn, Las Vegas, NV 89154 USA.
NR 10
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-2178-7
PY 2008
BP 2699
EP +
PG 2
WC Engineering, Electrical & Electronic
SC Engineering
GA BLO26
UT WOS:000270665401223
ER
PT B
AU Kafesaki, M
Penciu, R
Economou, EN
Katsarakis, N
Soukoulis, CM
Koschny, T
AF Kafesaki, Maria
Penciu, Raluca
Economou, Eleftherios N.
Katsarakis, Nikos
Soukoulis, Costas M.
Koschny, Thomas
BE Marciniak, M
TI Metamaterials for microwaves and optics
SO ICTON 2008: PROCEEDINGS OF 2008 10TH ANNIVERSARY INTERNATIONAL
CONFERENCE ON TRANSPARENT OPTICAL NETWORKS, VOL 2
LA English
DT Proceedings Paper
CT 10th International Conference on Transparent Optical Networks
CY JUN 22-26, 2008
CL Athens, GREECE
SP Natl Inst Telecommun, Athens Informat Technol, grnet, INTRACOM TELECOM, COST Act 291, IEEE LEOS
AB In the present talk we discuss Our recent attempts to obtain artificial magnetic metamaterials (i.e. metamaterials of negative permeability) and left-hand-handed materials (i.e. metamaterials of both negative permeability and permittivity) in the optical regime by scaling down well established microwave metamaterial designs. We focus on designs based on pairs of slabs (giving negative permeability) and continuous wires (giving negative permittivity) and we examine the scaling behavior of those designs through examination of the magnetic and electric resonance frequencies and the permeability and pemittivity resonances. The most pronounced observed characteristics are (a) the saturation of all the characteristic frequencies of the metamaterials in the optical regime and (b) the weakening of the magnetic permeability resonance. Those results are explained taking into account the kinetic energy of the electrons in the metallic components of the metamaterials. The consideration of the kinetic energy leads also to approximate analytical formulas for the saturation values of the characteristic frequencies which are useful for the optimization of the metamaterials designs.
C1 [Kafesaki, Maria; Penciu, Raluca; Economou, Eleftherios N.; Katsarakis, Nikos] Inst Elect Struct & Laser, Fdn Res & Technol Hellas, Iraklion, Greece.
[Soukoulis, Costas M.; Koschny, Thomas] Lowa State Univ, Dept Phys & Astronomy, Ames Lab, FORTH IESL, Ames, IA USA.
RP Kafesaki, M (reprint author), Inst Elect Struct & Laser, Fdn Res & Technol Hellas, Iraklion, Greece.
EM kafesaki@iesl.forth.gr
RI Economou, Eleftherios /E-6374-2010
NR 0
TC 0
Z9 0
U1 0
U2 4
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
PY 2008
BP 47
EP 47
DI 10.1109/ICTON.2008.4598586
PG 1
WC Computer Science, Hardware & Architecture; Engineering, Electrical &
Electronic; Optics; Telecommunications
SC Computer Science; Engineering; Optics; Telecommunications
GA BIH27
UT WOS:000259480300015
ER
PT S
AU Kramer, B
Chakraborty, S
Kroposki, B
AF Kramer, Bill
Chakraborty, Sudipta
Kroposki, Benjamin
GP IEEE
TI A Review of Plug-in Vehicles and Vehicle-to-Grid Capability
SO IECON 2008: 34TH ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS
SOCIETY, VOLS 1-5, PROCEEDINGS
SE IEEE Industrial Electronics Society
LA English
DT Proceedings Paper
CT 34th Annual Conference of the IEEE-Industrial-Electronics-Society
CY NOV 10-13, 2008
CL Orlando, FL
SP IEEE Ind Elect Soc, Soc Instrument & Control Engineers, Auburn Univ, Univ Seville, Univ Nova Lisbon, Univ Studi Catania
AB As hybrid vehicles gain popularity among the consumers, current research initiatives are focused towards developing plug-in electric and hybrid vehicles that can exploit utility power to charge vehicle batteries and therefore less dependent on the gasoline usage. Power electronic systems are being developed to allow plug-in vehicles to be vehicle-to-grid (V2G) capable where the vehicles can work as distributed resources and power can be sent back to the utility. In this paper a review of different plug-in and V2G capable vehicles are given along with their power electronics topologies. The economic implication of charging the vehicle or sending power back to the utility is described in brief. Finally, all vehicles with V2G capability must meet the IEEE Standard 1547 for connecting to the utility. Brief descriptions of the requirements and testing that must be followed for V2G vehicles to conform the IEEE 1547 standards are also discussed.
C1 [Kramer, Bill; Chakraborty, Sudipta; Kroposki, Benjamin] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Kramer, B (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA.
EM Bill_Kramer@nrel.gov; Sudipta_Chakraborty@nrel.gov;
Benjamin_Kroposki@nrel.gov
NR 15
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1553-572X
BN 978-1-4244-1767-4
J9 IEEE IND ELEC
PY 2008
BP 2205
EP 2210
PG 6
WC Computer Science, Artificial Intelligence; Computer Science, Software
Engineering; Engineering, Industrial; Engineering, Electrical &
Electronic
SC Computer Science; Engineering
GA BJI84
UT WOS:000266229301145
ER
PT S
AU Palensky, P
Kupzog, F
Zaidi, AA
Zhou, K
AF Palensky, Peter
Kupzog, Friederich
Zaidi, Adeel Abbas
Zhou, Kai
GP IEEE
TI Modeling domestic housing loads for demand response
SO IECON 2008: 34TH ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS
SOCIETY, VOLS 1-5, PROCEEDINGS
SE IEEE Industrial Electronics Society
LA English
DT Proceedings Paper
CT 34th Annual Conference of the IEEE-Industrial-Electronics-Society
CY NOV 10-13, 2008
CL Orlando, FL
SP IEEE Ind Elect Soc, Soc Instrument & Control Engineers, Auburn Univ, Univ Seville, Univ Nova Lisbon, Univ Studi Catania
AB Increasing electricity demand and upcoming shortages of resources, make on-line energy management like peak-load reduction and control energy provision by the demand side of the electric power system a valuable method for keeping the grid stable and efficient. For developing the next generation if these methods, a simulation environment for studying demand response (DR) algorithms with large-scale and detailed grid simulations is currently developed. An important part of this is an accurate but computationally inexpensive dynamic model for domestic housing and small business loads. This paper presents the design of this model and the deduction of the model parameters. As a determining factor for domestic loads, the power consumption of heating, ventilation and air conditioning (HVAC) systems has been identified. The model is partly based on earlier proposals that simulate the state changes of thermostatically controlled processes, but the complexity is further reduced to an absolute minimum. The result can be used as one of the basic building blocks required to set up a comprehensive simulation of power consumption in electric power grids under DR conditions.
C1 [Palensky, Peter] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Palensky, Peter] Univ Pretoria, Pretoria, South Africa.
[Kupzog, Friederich; Zaidi, Adeel Abbas; Zhou, Kai] Vienna Univ Technol, Inst Comp Technol, A-1040 Vienna, Austria.
RP Palensky, P (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
EM palensky@ieee.org; kupzog@ict.tuwien.ac.at; zaidia@ict.tuwien.ac.at;
zhou@ict.tuwien.ac.at
FU California Energy Commission via the LBNL Demand Response Research
Center
FX This work is supported by the California Energy Commission via the LBNL
Demand Response Research Center.
NR 10
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1553-572X
BN 978-1-4244-1767-4
J9 IEEE IND ELEC
PY 2008
BP 2655
EP +
PG 3
WC Computer Science, Artificial Intelligence; Computer Science, Software
Engineering; Engineering, Industrial; Engineering, Electrical &
Electronic
SC Computer Science; Engineering
GA BJI84
UT WOS:000266229301219
ER
PT S
AU Wu, ZQ
Su, GJ
AF Wu, Zhiqiao
Su, Gui-Jia
GP IEEE
TI High-Performance Permanent Magnet Machine Drive for Electric Vehicle
Applications Using a Current Source Inverter
SO IECON 2008: 34TH ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS
SOCIETY, VOLS 1-5, PROCEEDINGS
SE IEEE Industrial Electronics Society
LA English
DT Proceedings Paper
CT 34th Annual Conference of the IEEE-Industrial-Electronics-Society
CY NOV 10-13, 2008
CL Orlando, FL
SP IEEE Ind Elect Soc, Soc Instrument & Control Engineers, Auburn Univ, Univ Seville, Univ Nova Lisbon, Univ Studi Catania
ID INDUCTION-MOTOR DRIVES; SYSTEM; VOLTAGE; OUTPUT
AB This paper presents a high performance interior permanent magnet (IPM) machine drive using a current source inverter for EV/HEV applications. The constant power operation regions of an IPM machine can be greatly extended due to the voltage-boosting function naturally associated with the CSI and the field weakening techniques. An equivalent circuit model of the IPM machine including the effects of the ac filter capacitors and the motor core-loss resistor is presented, which eliminates the performance deregulation due to the error between the torque producing current of the IPM machine and the current command of the CSI. According to the special requirements of the automotive applications, a novel two-stage control strategy is also proposed to achieve both minimum system losses and high system performance within the whole operating range including the field-weakening region. Simulation results are presented to validate the functionality of the boost mechanism, the effectiveness of the equivalent circuit model and the proposed control scheme.
C1 [Wu, Zhiqiao] Oak Ridge Associated Univ, Knoxville, TN 37932 USA.
[Su, Gui-Jia] Oak Ridge Natl Lab, Knoxville, TN 37932 USA.
RP Wu, ZQ (reprint author), Oak Ridge Associated Univ, Knoxville, TN 37932 USA.
EM wuz2@ornl.gov; sugj@ornl.gov
FU UT-Battelle; LLC with the U.S. Department of Energy [DE-AC05-00OR22725]
FX This manuscript has been authored by UT-Battelle, LLC, under contract
DE-AC05-00OR22725 with the U.S. Department of Energy. The United States
Government retains and the publisher, by accepting the article for
publication, acknowledges that the United States Government retains a
non- exclusive, paid-up, irrevocable, world-wide license to publish or
reproduce the published form of this manuscript, or allow others to do
so, for United States Government purposes.
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 1553-572X
BN 978-1-4244-1767-4
J9 IEEE IND ELEC
PY 2008
BP 2722
EP +
PG 2
WC Computer Science, Artificial Intelligence; Computer Science, Software
Engineering; Engineering, Industrial; Engineering, Electrical &
Electronic
SC Computer Science; Engineering
GA BJI84
UT WOS:000266229301230
ER
PT S
AU Liu, HW
Tolbert, LM
Ozpineci, B
Du, Z
AF Liu, Haiwen
Tolbert, Leon M.
Ozpineci, Burak
Du, Zhong
GP IEEE
TI Comparison of Fundamental Frequency and PWM Methods Applied on a Hybrid
Cascaded Multilevel Inverter
SO IECON 2008: 34TH ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS
SOCIETY, VOLS 1-5, PROCEEDINGS
SE IEEE Industrial Electronics Society
LA English
DT Proceedings Paper
CT 34th Annual Conference of the IEEE-Industrial-Electronics-Society
CY NOV 10-13, 2008
CL Orlando, FL
SP IEEE Ind Elect Soc, Soc Instrument & Control Engineers, Auburn Univ, Univ Seville, Univ Nova Lisbon, Univ Studi Catania
ID MODULATION INDEXES; CONVERTERS
AB This paper presents a hybrid cascaded multilevel inverter for electric vehicles (EV) / hybrid electric vehicles (HEV) and utility interface applications. The inverter consists of a standard 3-leg inverter (one leg for each phase) and H-bridge in series with each inverter leg. It can use only a single DC power source to supply a standard 3-leg inverter along with three full H-bridges supplied by capacitors or batteries. Both fundamental frequency and high switching frequency PWM methods are used for the hybrid multilevel inverter. An experimental 5 kW prototype inverter is built and tested. The above two switching control methods are validated and compared experimentally.
C1 [Liu, Haiwen; Tolbert, Leon M.] Univ Tennessee, Knoxville, TN 37996 USA.
[Tolbert, Leon M.; Ozpineci, Burak] Oak Ridge Natl Lab, Knoxville, TN 37932 USA.
[Du, Zhong] Parker Hannifin Corp, Olivet, MI 38654 USA.
RP Liu, HW (reprint author), Univ Tennessee, Knoxville, TN 37996 USA.
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
SN 1553-572X
BN 978-1-4244-1767-4
J9 IEEE IND ELEC
PY 2008
BP 3124
EP +
PG 2
WC Computer Science, Artificial Intelligence; Computer Science, Software
Engineering; Engineering, Industrial; Engineering, Electrical &
Electronic
SC Computer Science; Engineering
GA BJI84
UT WOS:000266229302064
ER
PT J
AU Sweatt, WC
Gill, DD
Adams, DP
Vasile, MJ
Claudet, AA
AF Sweatt, W. C.
Gill, D. D.
Adams, D. P.
Vasile, M. J.
Claudet, A. A.
TI Diamond milling of micro-optics
SO IEEE AEROSPACE AND ELECTRONIC SYSTEMS MAGAZINE
LA English
DT Article
AB A diamond mill (a tiny end mill) can cut aspheric lenses and mirrors with diameters smaller than 0.5 mm. The cutting tool has a two-dimensional shape and is spun about the axis of the surface to be cut. As the spinning tool is plunged into the substrate, it cuts a radially symmetric surface to sub-micron accuracies. Commercially available circular diamond tools can be modified to aspheric shapes using a focused ion beam. Fabrication examples will be presented and the optical performance of an array of micro-lenses will be described.
C1 [Sweatt, W. C.; Gill, D. D.; Adams, D. P.; Vasile, M. J.; Claudet, A. A.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Sweatt, WC (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
NR 3
TC 9
Z9 9
U1 1
U2 7
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0885-8985
J9 IEEE AERO EL SYS MAG
JI IEEE Aerosp. Electron. Syst. Mag.
PD JAN
PY 2008
VL 23
IS 1
BP 13
EP 17
DI 10.1109/AES-M.2008.4444483
PG 5
WC Engineering, Aerospace; Engineering, Electrical & Electronic
SC Engineering
GA 253KV
UT WOS:000252518000002
ER
PT J
AU Basilio, LI
Williams, JT
Jackson, DR
Chen, RL
AF Basilio, Lorena I.
Williams, Jeffery T.
Jackson, David R.
Chen, Richard L.
TI Characteristics of an inverted shorted annular-ring-reduced surface-wave
antenna
SO IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
LA English
DT Article
DE global positioning satellite (GPS); microstrip antennas; multipath
interference; surface waves
AB The electrical characteristics of an inverted shorted annular-ring-reduced surface-wave (RSW) antenna are presented in this letter. This microstrip antenna is designed for RSW excitation and lateral radiation and, hence, the characteristic patterns are relatively smooth in the forward region and demonstrate significantly reduced backscattered radiation, relative to a conventional microstrip patch. Results from a theoretical analysis of the antenna will be presented, along with confirming experimental results. These results include a radiation, input impedance, efficiency, bandwidth, directivity, and gain characterization of the antenna.
C1 [Basilio, Lorena I.; Williams, Jeffery T.; Jackson, David R.; Chen, Richard L.] Univ Houston, Dept Elect & Comp Engn, Houston, TX 77204 USA.
RP Basilio, LI (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
NR 7
TC 5
Z9 5
U1 0
U2 2
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 1536-1225
J9 IEEE ANTENN WIREL PR
JI IEEE Antennas Wirel. Propag. Lett.
PY 2008
VL 7
BP 123
EP 126
DI 10.1109/LAWP.2008.921321
PG 4
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA 339OD
UT WOS:000258586000031
ER
EF