National Library of Energy BETA

Sample records for ish ther mal

  1. Investigation of the physical properties of the tetragonal CeMAl4Si2...

    Office of Scientific and Technical Information (OSTI)

    the tetragonal CeMAl4Si2 (M Rh, Ir, Pt) compounds Prev Next Title: Investigation of the physical properties of the tetragonal CeMAl4Si2 (M Rh, Ir, Pt) compounds The ...

  2. INDUSTRIAL SAFETY & HEALTH (ISH)

    Office of Environmental Management (EM)

    IIT-Industry Collaboration - Synchrophasor Engineering Research and Training Applicant: Illinois Institute of Technology (IIT) Principal Investigator: Alexander J. Flueck, flueck@iit.edu, 312-567-3625 Project Description Illinois Institute of Technology (IIT) has installed 12 Phasor Measurement Units (PMUs) on its main campus, home to the DOE-funded Perfect Power Microgrid. With the assistance of IIT Facilities, the PMU project has been gathering synchrophasor data from the 4 kV campus

  3. Investigation of the physical properties of the tetragonal CeMAl4Si2 (M = Rh, Ir, Pt) compounds

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Ghimire, N. J.; Ronning, F.; Williams, D. J.; Scott, B. L.; Luo, Yongkang; Thompson, J. D.; Bauer, E. D.

    2014-12-15

    The synthesis, crystal structure and physical properties studied by means of x-ray diffraction, magnetic, thermal and transport measurements of CeMAl4Si2 (M = Rh, Ir, Pt) are reported, along with the electronic structure calculations for LaMAl4Si2 (M = Rh, Ir, Pt). These materials adopt a tetragonal crystal structure (space group P4/mmm) comprised of BaAl4 blocks, separated by MAl2 units, stacked along the c-axis. Both CeRhAl4Si2 and CeIrAl4Si2 order antiferromagnetically below TN1 = 14 and 16 K, respectively, and undergo a second antiferromagnetic transitition at lower temperature (TN2 = 9 and 14 K, respectively). CePtAl4Si2 orders ferromagnetically below TC = 3 Kmore » with an ordered moment of μsat = 0.8 μB for a magnetic field applied perpendicular to the c-axis. Electronic structure calculations reveal quasi-2D character of the Fermi surface.« less

  4. Step-by-step thermal transformations of a new porous coordination polymer [(H{sub 2}O){sub 5}CuBa(Me{sub 2}mal){sub 2}]{sub n} (Me{sub 2}mal{sup 2-}=dimethylmalonate): Thermal degradation to barium cuprate

    SciTech Connect (OSTI)

    Zauzolkova, Natalya; Dobrokhotova, Zhanna; Lermontov, Anatoly; Zorina, Ekaterina; Emelina, Anna; Bukov, Mikhail; Sidorov, Aleksey; Kiskin, Mikhail; Bogomyakov, Artem; Lytvynenko, Anton; Kolotilov, Sergey; Velikodnyi, Yuriy; Kovba, Maksim

    2013-01-15

    The reactions of CuSO{sub 4}{center_dot}5H{sub 2}O, dimethylmalonic acid and Ba(OH){sub 2}{center_dot}H{sub 2}O (Cu: H{sub 2}Me{sub 2}mal: Ba=1: 2: 2) in aqueous and aqueous-ethanol solutions (H{sub 2}O: EtOH=1: 1) resulted in formation of 3D-porous coordination polymers [(H{sub 2}O){sub 3}({mu}-H{sub 2}O){sub 2}CuBa({mu}{sub 3}-Me{sub 2}mal)(Me{sub 2}mal)]{sub n} (1) and [({mu}-H{sub 2}O)CuBa({mu}{sub 3}-Me{sub 2}mal)({mu}{sub 4}-Me{sub 2}mal)]{sub n} (2), respectively. It has been shown that compound 2 was an intermediate in the thermal degradation of compound 1. Thorough studies of solid-state thermolysis of 1 and 2 allowed to detect formation of coordination polymer [CuBa({mu}{sub 4}-Me{sub 2}mal)({mu}{sub 5}-Me{sub 2}mal)]{sub n} (3), structure of which was determined by X-ray powder diffraction. It has been found that the channels in polymer 3 were accessible for guest molecules (MeOH). Theoretical estimation of methanol diffusion barrier was carried out. Complete solid-phase thermolysis of 1 and 2 leads to a mixture of BaCuO{sub 2}, BaCO{sub 3}, and CuO. Special conditions for obtaining of a crystalline phase of pure cubic BaCuO{sub 2} were determined. - Graphical abstract: Step-by-step transformation of new coordination polymer [(H{sub 2}O){sub 5}CuBa(Me{sub 2}mal){sub 2}]{sub n} to [(H{sub 2}O)CuBa(Me{sub 2}mal){sub 2}]{sub n} and [CuBa(Me{sub 2}mal){sub 2}]{sub n} were performed. Dehydration of initial compound leads to structural changes of 12-membered ring fragment. All compounds have porous structure. The final product of thermal decomposition is crystalline phase of individual cubic BaCuO{sub 2}. Highlights: Black-Right-Pointing-Pointer New 3D-polymers [(H{sub 2}O){sub 5}CuBa(Me{sub 2}mal){sub 2}]{sub n} and [(H{sub 2}O)CuBa(Me{sub 2}mal){sub 2}]{sub n} were synthesized. Black-Right-Pointing-Pointer Thermal analysis showed step-by-step transformations of [(H{sub 2}O){sub 5}CuBa(Me{sub 2}mal){sub 2}]{sub n}. Black-Right-Pointing-Pointer Crystalline phase of pure cubic BaCuO{sub 2} is the product solid-phase thermolysis.

  5. In vivo subcellular localization of Mal de Rio Cuarto virus (MRCV) non-structural proteins in insect cells reveals their putative functions

    SciTech Connect (OSTI)

    Maroniche, Guillermo A.; Mongelli, Vanesa C.; Llauger, Gabriela; Alfonso, Victoria; Taboga, Oscar

    2012-09-01

    The in vivo subcellular localization of Mal de Rio Cuarto virus (MRCV, Fijivirus, Reoviridae) non-structural proteins fused to GFP was analyzed by confocal microscopy. P5-1 showed a cytoplasmic vesicular-like distribution that was lost upon deleting its PDZ binding TKF motif, suggesting that P5-1 interacts with cellular PDZ proteins. P5-2 located at the nucleus and its nuclear import was affected by the deletion of its basic C-termini. P7-1 and P7-2 also entered the nucleus and therefore, along with P5-2, could function as regulators of host gene expression. P6 located in the cytoplasm and in perinuclear cloud-like inclusions, was driven to P9-1 viroplasm-like structures and co-localized with P7-2, P10 and {alpha}-tubulin, suggesting its involvement in viroplasm formation and viral intracellular movement. Finally, P9-2 was N-glycosylated and located at the plasma membrane in association with filopodia-like protrusions containing actin, suggesting a possible role in virus cell-to-cell movement and spread.

  6. Short time proton dynamics in bulk ice and in porous anode solid oxide fuel cell materials

    SciTech Connect (OSTI)

    Basoli, Francesco; Senesi, Roberto; Kolesnikov, Alexander I; Licoccia, Silvia

    2014-01-01

    Oxygen reduction and incorporation into solid electrolytes and the reverse reaction of oxygen evolution play a cru-cial role in Solid Oxide Fuel Cell (SOFC) applications. However a detailed un derstanding of the kinetics of the cor-responding reactions, i.e. on reaction mechanisms, rate limiting steps, reaction paths, electrocatalytic role of materials, is still missing. These include a thorough characterization of the binding potentials experienced by protons in the lattice. We report results of Inelastic Neutron Scattering (INS) measurements of the vibrational state of the protons in Ni- YSZ highly porous composites (75% to 90% ), a ceramic-metal material showing a high electrical conductivity and ther mal stability, which is known to be most effectively used as anodes for solid ox ide fuel cells. The results are compared with INS and Deep Inelastic Neutron Scattering (DINS) experiments on the proton binding states in bulk ice.

  7. Investigation of the physical properties of the tetragonal CeMAl4Si2...

    Office of Scientific and Technical Information (OSTI)

    You are accessing a document from the Department of Energy's (DOE) SciTech Connect. This ... The synthesis, crystal structure and physical properties studied by means of x-ray ...

  8. Temperature dependence of the photo-induced inverse spin Hall effect in Au/InP hybrid structures

    SciTech Connect (OSTI)

    Khamari, Shailesh K. Porwal, S.; Dixit, V. K.; Sharma, T. K.

    2014-01-27

    Photo-induced Inverse Spin Hall Effect (ISHE) measurements on Au/InP hybrid structures are performed over a temperature range of 45 to 300?K. Dependence of the spin current density on the degree of circular polarization and also on the angle of incidence of laser beam confirms the ISHE origin of measured signal. The magnitude of ISHE increases with sample cooling. A numerical model based on the spin relaxation of non-equilibrium spin-polarized electrons is proposed for predicting the temperature dependence of ISHE. Our results indicate that the proposed device can be used as a spin photodetector over a wide temperature range.

  9. Swatch Group | Open Energy Information

    Open Energy Info (EERE)

    Swatch Group Jump to: navigation, search Name: Swatch Group Place: Switzerland Product: String representation "The Swatch Grou ... ther industries" is too long. References: Swatch...

  10. GSA Office of Governmentwide Policy CIVILIAN AGENCY ACQUISITION...

    Office of Environmental Management (EM)

    GSA Office of Governmentwide Policy CIVILIAN AGENCY ACQUISITION LETTER 2013-03 May 7, 2013 MEMORANDUM FOR Cl N AG THER THAN NASA FROM: -LAURAAULETTA CHAIR CIVILIAN AGENCY ...

  11. Protermosolar | Open Energy Information

    Open Energy Info (EERE)

    Place: Sevilla, Spain Zip: 41092 Sector: Solar Product: Association of Solar Ther Electricity Generation (STEG) and equipment providers in Spain References:...

  12. Alliance to Save Energy | Open Energy Information

    Open Energy Info (EERE)

    Washington, DC Zip: 20036 Sector: Efficiency Product: String representation "Founded in 1977 ... ther countries." is too long. References: Alliance to Save Energy1 Information...

  13. GSA Office of Governmentwide Policy CIVILIAN AGENCY ACQUISITION...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    N AG THER THAN NASA FROM: -LAURAAULETTA CHAIR CIVILIAN AGENCY ACQUISITION COUNCIL (CAAC) ... This CAAC memorandum constitutes consultation with the Chair of the CAAC required by FAR ...

  14. Observation of the inverse spin Hall effect in ZnO thin films: An all-electrical approach to spin injection and detection

    SciTech Connect (OSTI)

    Prestgard, Megan C.; Tiwari, Ashutosh

    2014-03-24

    The inverse spin Hall effect (ISHE) is a newly discovered, quantum mechanical phenomenon where an applied spin current results in the generation of an electrical voltage in the transverse direction. It is anticipated that the ISHE can provide a more simple way of measuring spin currents in spintronic devices. The ISHE was first observed in noble metals that exhibit strong spin-orbit coupling. However, recently, the ISHE has been detected in conventional semiconductors (such as Si and Ge), which possess weak spin-orbit coupling. This suggests that large-spin orbit coupling is not a requirement for observing the ISHE. In this paper, we are reporting the observation of the ISHE in an alternative semiconductor material, zinc oxide (ZnO) using all-electrical means. In our study, we found that when a spin-polarized current is injected into the ZnO film from a NiFe ferromagnetic injector via an MgO tunnel barrier layer, a voltage transverse to both the direction of the current as well as its spin-polarization is generated in the ZnO layer. The polarity of this voltage signal was found to flip on reversing the direction of the injected current as well as on reversing the polarization of the current, consistent with the predictions of the ISHE process. Through careful analysis of the ISHE data, we determined a spin-Hall angle of approximately 1.651 × 10{sup −2} for ZnO, which is two orders of magnitude higher than that of silicon. Observation of a detectable room-temperature ISHE signal in ZnO via electrical injection and detection is a groundbreaking step that opens a path towards achieving transparent spin detectors for next-generation spintronic device technology.

  15. EIECYNC PRODUCYS INC. I

    Office of Legacy Management (LM)

    EIECYNC PRODUCYS INC. .-- I j..%+g3& *.' .-.'- Atomic Energy Divisis, A.rA.od n 2i?ish BAYSIDE, NEW YORK September b, 1952 Xanagcr of Operations U. S. Atomic Energy Commission ...

  16. High Power Coax Window

    SciTech Connect (OSTI)

    Neubauer, M. L.; Dudas, A.; Sah, R.; Elliott, T. S.; Rimmer, R. A.; Stirbet, M. S.

    2010-05-23

    A su­per­con­duct­ing RF (SRF) power cou­pler ca­pa­ble of han­dling 500 kW CW RF power is re­quired for pre­sent and fu­ture stor­age rings and linacs. There are over 35 cou­pler de­signs for SRF cav­i­ties rang­ing in fre­quen­cy from 325 to 1500 MHz. Cou­pler win­dows vary from cylin­ders to cones to disks, and RF power cou­plers are lim­it­ed by the abil­i­ty of ce­ram­ic win­dows to with­stand the stress­es due to heat­ing and me­chan­i­cal flex­ure. We pro­pose a novel ro­bust co-ax­i­al SRF cou­pler de­sign which uses com­pressed win­dow tech­nol­o­gy. This tech­nol­o­gy will allow the use of high­ly ther­mal­ly con­duc­tive ma­te­ri­als for cryo­genic win­dows. Using com­pressed win­dow tech­niques on disk co-ax­i­al win­dows will make sig­nif­i­cant im­prove­ments in the power han­dling of SRF cou­plers. We pre­sent the bench test re­sults of two win­dow as­sem­blies back to back, as well as in­di­vid­u­al win­dow VSWR in EIA3.125 coax. A vac­u­um test as­sem­bly was made and the win­dows baked out at 155C. The pro­cess­es used to build win­dows is scal­able to larg­er di­am­e­ter coax and to high­er power lev­els.

  17. A Flow-Channel Analysis for the Mars Hopper

    SciTech Connect (OSTI)

    W. Spencer Cooley

    2013-02-01

    The Mars Hopper is an exploratory vehicle designed to fly on Mars using carbon dioxide from the Martian atmosphere as a rocket propellant. The propellent gasses are thermally heated while traversing a radioisotope ther- mal rocket (RTR) engine’s core. This core is comprised of a radioisotope surrounded by a heat capacitive material interspersed with tubes for the propellant to travel through. These tubes, or flow channels, can be manu- factured in various cross-sectional shapes such as a special four-point star or the traditional circle. Analytical heat transfer and computational fluid dynamics (CFD) anal- yses were performed using flow channels with either a circle or a star cross- sectional shape. The nominal total inlet pressure was specified at 2,805,000 Pa; and the outlet pressure was set to 2,785,000 Pa. The CO2 inlet tem- perature was 300 K; and the channel wall was 1200 K. The steady-state CFD simulations computed the smooth-walled star shape’s outlet temper- ature to be 959 K on the finest mesh. The smooth-walled circle’s outlet temperature was 902 K. A circle with a surface roughness specification at 0.01 mm gave 946 K and at 0.1 mm yielded 989 K. The The effects of a slightly varied inlet pressure were also examined. The analytical calculations were based on the mass flow rates computed in the CFD simulations and provided significantly higher outlet temperature results while displaying the same comparison trends. Research relating to the flow channel heat transfer studies was also done. Mathematical methods to geometrically match the cross-sectional areas of the circle and star, along with a square and equilateral triangle, were derived. A Wolfram Mathematica 8 module was programmed to analyze CFD results using Richardson Extrapolation and calculate the grid convergence index (GCI). A Mathematica notebook, also composed, computes and graphs the bulk mean temperature along a flow channel’s length while the user dynam- ically provides the input variables, allowing their effects on the temperature to be more easily observed.

  18. BPA-2014-01328-FOIA Response

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    0 Alarm 181 Auto Accident 0 Client Comp. 0 Emergency 0 Fire 0 Open SafeFile 0 Prop. Damage 0 Safety Hazard 0 Susp Person(s) 0 Theft 0 Water Leak 00ther Explain: Vehicle...

  19. I

    Office of Legacy Management (LM)

    It is only after thorough research efforts of concentrati-on hav fi-.led that treatment of ... of thle hi -.. .:'"' e r': .:l..led r.ther ttan the ef'ici.c.cy of .chod employed. ...

  20. Dependence of inverse-spin Hall effect and spin-rectified voltage on tantalum thickness in Ta/CoFeB bilayer structure

    SciTech Connect (OSTI)

    Kim, Sang-Il; Seo, Min-Su; Park, Seung-Young; Kim, Dong-Jun; Park, Byong-Guk

    2015-01-19

    Ta-layer thickness (t{sub Ta}) dependence of the measured DC voltage V from the inverse-spin Hall effect (ISHE) in Ta/CoFeB bilayer structure is experimentally investigated using the ferromagnetic resonance in the TE{sub 011} resonant cavity. The ISHE signals excluding the spin-rectified effect (SRE) were separated from the fitted curve of V against t{sub Ta}. For t{sub Ta} ≈ λ{sub Ta} (Ta-spin diffusion length = 2.7 nm), the deviation in ISHE voltage V{sub ISH} between the experimental and theoretical values is significantly increased because of the large SRE contribution, which also results in a large deviation in the spin Hall angle θ{sub SH} (from 10% to 40%). However, when t{sub Ta} ≫ λ{sub Ta}, the V{sub ISH} values are consistent with theoretical values because the SRE terms become negligible, which subsequently improves the accuracy of the obtained θ{sub SH} within 4% deviation. The results will provide an outline for an accurate estimation of the θ{sub SH} for materials with small λ value, which would be useful for utilizing the spin Hall effect in a 3-terminal spintronic devices in which magnetization can be controlled by in-plane current.

  1. The spin Hall angle and spin diffusion length of Pd measured by spin pumping and microwave photoresistance

    SciTech Connect (OSTI)

    Tao, X. D.; Feng, Z.; Miao, B. F.; Sun, L.; You, B.; Wu, D.; Du, J.; Zhang, W.; Ding, H. F., E-mail: hfding@nju.edu.cn [Department of Physics, National Laboratory of Solid State Microstructures, Nanjing University, 22 Hankou Road, Nanjing 210093 (China)

    2014-05-07

    We present the experimental study of the spin Hall angle (SHA) and spin diffusion length of Pd with the spin pumping and microwave photoresistance effects. The Py/Pd bilayer stripes are excited with an out-of-plane microwave magnetic field. The pure spin current is thus pumped and transforms into charge current via the inverse spin Hall effect (ISHE) in Pd layer, yielding an ISHE voltage. The ISHE voltage can be distinguished from the unwanted signal caused by the anisotropic magnetoresistance according to their different symmetries. Together with Pd thickness dependent measurements of in and out-of-plane precessing angles and effective spin mixing conductance, the SHA and spin-diffusion length of Pd are quantified as 0.0056??0.0007 and 7.3??0.7?nm, respectively.

  2. Method of freezing living cells and tissues with improved subsequent survival

    DOE Patents [OSTI]

    Senkan, Selim M.; Hirsch, Gerald P.

    1980-01-01

    This invention relates to an improved method for freezing red blood cells, ther living cells, or tissues with improved subsequent survival, wherein constant-volume freezing is utilized that results in significantly improved survival compared with constant-pressure freezing; optimization is attainable through the use of different vessel geometries, cooling baths and warming baths, and sample concentrations.

  3. Donald Frederick, LLNL

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    o f t he n ext generaBon o f h igh---Z m aterials s imulaBons w hile a t t he s ame B me straighlorward f or o thers t o r eplicate a nd c ompare p erformance...

  4. The Los Alamos Postdoc Career Fair is an

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    m aterials t echnology, s uper---compu>ng, a nd m any other fi elds. L ANL h as a l ong---standing t radi>on o f p artnering with u niversi>es, i ndustries, a nd o ther n...

  5. Generation of spin currents in the skyrmion phase of a helimagnetic insulator Cu{sub 2}OSeO{sub 3}

    SciTech Connect (OSTI)

    Hirobe, Daichi Shiomi, Yuki; Shimada, Yuhki; Ohe, Jun-ichiro; Saitoh, Eiji

    2015-02-07

    We report spin-current generation related to skyrmion dynamics resonantly excited by a microwave in a helimagnetic insulator Cu{sub 2}OSeO{sub 3}. A Pt layer was fabricated on Cu{sub 2}OSeO{sub 3} and voltage in the Pt layer was measured upon magnetic upon magnetic resonance of Cu{sub 2}OSeO{sub 3} to electrically detect injected spin currents via the inverse spin Hall effect (ISHE) in Pt. We found that ISHE-induced electromotive forces appear in the skyrmion phase of Cu{sub 2}OSeO{sub 3} as well as in the ferrimagnetic phase, which shows that magnetic skyrmions can contribute to the spin pumping effect.

  6. Determination of gene expression patterns using high-throughput RNA in situ hybridizaion to whole-mount Drosophila embryos

    SciTech Connect (OSTI)

    Weiszmann, R.; Hammonds, A.S.; Celniker, S.E.

    2009-04-09

    We describe a high-throughput protocol for RNA in situ hybridization (ISH) to Drosophila embryos in a 96-well format. cDNA or genomic DNA templates are amplified by PCR and then digoxigenin-labeled ribonucleotides are incorporated into antisense RNA probes by in vitro transcription. The quality of each probe is evaluated before ISH using a RNA probe quantification (dot blot) assay. RNA probes are hybridized to fixed, mixed-staged Drosophila embryos in 96-well plates. The resulting stained embryos can be examined and photographed immediately or stored at 4oC for later analysis. Starting with fixed, staged embryos, the protocol takes 6 d from probe template production through hybridization. Preparation of fixed embryos requires a minimum of 2 weeks to collect embryos representing all stages. The method has been used to determine the expression patterns of over 6,000 genes throughout embryogenesis.

  7. American Recovery & Reinvestment Act Newsletter - Issue 20

    Office of Environmental Management (EM)

    LOS ALAMOS, N.M. - The skyline of Los Alamos was changed forever when 24 old buildings and structures were demol- ished with American Recovery and Reinvestment Act funding. "Our most significant accomplishment of 2010 was the suc- cessful completion of the decontamination and demolition of 24 old buildings and structures at Technical Area 21," said Al Chaloupka, project director of building demolition at Technical Area (TA-21). "In addition to demolishing these old buildings, the

  8. American Recovery & Reinvestment Act Newsletter - Issue 22

    Office of Environmental Management (EM)

    Before American Recovery and Reinvestment Act workers set out to clean up contamination and demol- ish facilities that supported the Cold War and the Manhattan Project, Oak Ridge called on its budget analysts and financial personnel to ensure that the $755 million Recovery Act investment would be used effectively and expeditiously. The planners for Oak Ridge's Environmental Management (EM) program quickly compiled a list of shovel-ready projects that would accomplish key DOE missions and create

  9. Resonant cavity mode dependence of anomalous and inverse spin Hall effect

    SciTech Connect (OSTI)

    Kim, Sang-Il; Seo, Min-Su; Park, Seung-young

    2014-05-07

    The direct current electric voltage induced by the Inverse Spin Hall Effect (ISHE) and Anomalous Hall Effect (AHE) was investigated in the TE{sub 011} and TE{sub 102} cavities. The ISHE and AHE components were distinguishable through the fitting of the voltage spectrum. The unwanted AHE was minimized by placing the DUT (Device Under Test) at the center of both the TE{sub 011} and TE{sub 102} cavities. The voltage of ISHE in the TE{sub 011} cavity was larger than that in the TE{sub 102} cavity due to the higher quality factor of the former. Despite optimized centering, AHE voltage from TE{sub 011} cavity was also higher. The reason was attributed to the E-field distribution inside the cavity. In the case of the TE{sub 011} cavity, the DUT was easily exposed to the E-field in all directions. Therefore, the parasitic AHE voltage in the TE{sub 102} cavity was less sensitive than that in the TE{sub 011} cavity to decentering problem.

  10. Interplay of topological surface and bulk electronic states in...

    Office of Scientific and Technical Information (OSTI)

    Title: Interplay of topological surface and bulk electronic states in Bi2Se3 Authors: Romanowich, Megan ; Lee, Mal-Soon ; Chung, Duck-Young ; Mahanti, S. D. ; Kanatzidis, Mercouri ...

  11. Lisa Gerhardt! NERSC User Services! Nick Balthaser! NERSC Storage...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ... n ot o p6mal f or H PSS --- 9 --- Globus Web Transfer * Web i niFated t ransfer --- 1 0 ... o ver f rom t he b eginning * High---latencyunreliable n etworks - HPSS v ery s ...

  12. AFV CoverSheet

    Office of Scientific and Technical Information (OSTI)

    ... In our search for new families of heavy fermion compounds that may show interesting behavior, we focus our attention on CeMAl4Si2 (MRh, Ir, Pt). These compounds adopt a tetragonal ...

  13. Koniges_ICNSP2013e.pptx

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Material Plasma Modeling on HPC Platforms A. Koniges 1 , W. Lui 1 , Y. He 1 , D. Eder 2 , A. Fisher 2 , N. Masters 2 , and R. W. Anderson 2 1 Lawrence Berkeley National Laboratory 2 Lawrence Livermore National Laboratory 23 rd International Conference on Numerical Simulation of Plasmas Beijing, China September 16, 2013 What this talk is NOT about* *But s ee m e i f y ou w ish m ore i nforma2on * Advanced hybrid techniques to overlap communication and computation in GTS (Princeton Gyrokinetic

  14. Strongly enhanced spin current in topological insulator/ferromagnetic metal heterostructures by spin pumping

    SciTech Connect (OSTI)

    Wu, C. N.; Hung, H. Y.; Lin, H. Y.; Lin, P. H.; Kwo, J. E-mail: raynien@phys.nthu.edu.tw; Lin, Y. H.; Fanchiang, Y. T.; Hong, M. E-mail: raynien@phys.nthu.edu.tw; Lin, J. G.; Lee, S. F.

    2015-05-07

    Spin pumping effect in Bi{sub 2}Se{sub 3}/Fe{sub 3}Si and Fe/Bi{sub 2}Te{sub 3} heterostructures was studied. High quality films of Bi{sub 2}Se{sub 3}(001) on ferromagnetic Fe{sub 3}Si(111) layer and Fe(111) films on Bi{sub 2}Te{sub 3}(001) layer were grown epitaxially by molecular beam epitaxy. Using a microwave cavity source, large voltages due to the Inverse Spin Hall Effect (V{sub ISHE}) were detected in Bi{sub 2}Se{sub 3}(001)/Fe{sub 3}Si(111) bi-layer at room temperature. V{sub ISHE} of up to 63.4 ± 4.0 μV at 100 mW microwave power (P{sub MW}) was observed. In addition, Fe(111)/Bi{sub 2}Te{sub 3}(001) bi-layer also showed a large V{sub ISHE} of 3.0 ± 0.1 μV at P{sub MW} of 25 mW. V{sub ISHE} of both structures showed microwave linear power dependence in accordance with the theoretical model of spin pumping. The spin Hall angle was calculated to be 0.0053 ± 0.002 in Bi{sub 2}Se{sub 3} and was estimated to be 0.0068 ± 0.003 in Bi{sub 2}Te{sub 3}. The charge current density (J{sub c}) of Bi{sub 2}Se{sub 3}/Fe{sub 3}Si and Fe/Bi{sub 2}Te{sub 3} structures are comparable and are about 2–5 times higher than the Fe{sub 3}Si/normal metal and Fe{sub 3}Si/GaAs results. The significant enhancement of spin current in topological insulator/ferromagnetic metal (TI/FM) and FM/TI bilayers is attributed to strong spin-orbit coupling inherent of TIs and demonstrates the high potential of exploiting TI-based structures for spintronic applications.

  15. AwardWinnersByCategoryProject

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Category Project Name Team Member Group Change Agents Gold Award Nominated by Mary Neu Re-Sourcing! Pj Martinez DSESH-STO Dave Seagraves RP-SVS Laurie Tomlinson B-DO Star - Change Agents Award Nominated by Elizabeth Joseph Catalysts for Improved Chemical Management Monica Andersen BPS-DO James Corey Larkin OPS-SIO Cheryl Lucas OS-DO Dina Siegel OSH-ISH Jon Tapia PS-3 Environmental Management Systems Gold Award Nominated by Stephen Glick Leading LANL's Legacy Lead to LANSCE Fredric Bolton

  16. Ankit Bhagatwala! NERSC User Services Group! New User Training!

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Ankit Bhagatwala! NERSC User Services Group! ! New User Training! March 21, 2016 Computing Environment Node Types * Login nodes - Shared w ith o ther u sers - Code c ompila3on, j ob p repara3on a nd s ubmission * Compute n odes - Not s hared ( except s hared q ueue o n C ori) * Service nodes - File s ystem a ccess ( lustre), d ata m ovement ( HPSS), network c onnec3ons t o o utside w orld, e tc. - Not a ccessed d irectly --- 2 --- Login Node Configuration * Edison - Twelve n odes * 16 c ores, 2

  17. WEC-Sim-METS2014_Final

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    radiation added---mass and damping terms from other bodies, whereas Babarit [14] 7 considers these terms. Further studies are underway to develop the capability to model off--- diagonal h ydrodynamic f orces f rom o ther b odies. CONCLUSIONS NREL and SNL have developed an open---source numerical m odeling t ool f or d esign a nd a nalysis o f a wide span of WEC devices. In this paper, we applied WEC---Sim to model a two---body floating--- point absorber and two types of oscillating surge

  18. WEC-Sim-METS2014_Final

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    radiation, added---mass, and damping terms from other bodies in the mass matrix, 7 whereas Babarit [14] considers these terms. Further studies are underway to develop the capability to model off---diagonal hydrodynamic forces f rom o ther b odies. CONCLUSIONS NREL and SNL have developed an open---source numerical m odeling t ool f or d esign a nd a nalysis o f a wide span of WEC devices. In this paper, we applied WEC---Sim to model a two---body floating--- point absorber and two types of

  19. ORNL/RASA-85/

    Office of Legacy Management (LM)

    e?Ll ( U o't /u/ / ORNL/RASA-85/ 4I 4 RESULTS 0FRADI0L0GICALMEASUREMENTSTMENNEA OF BUFFALO AVENUE A'ID HYffi PARK BLVD. IN NIAGARA FALLS' NET{ YORK Access to the inlormation in thit rtport ir limitcd to tho!' ino-icateo on tha distribution list and to oepartmsnt of Encrgy tnd Oepartment ol Enoqy Contracton F This report was prepared as an accountof work sponsored by an agency of the UnitedstatesGovernment.NeithertheUnitedstatesGovernmentnoranyagency thereo|, nor any o| the.r employees, makes any

  20. AMENDMENT OF SOLICITATION/MODIFICATION

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    OF CONTRACT 1.CNRTIDOEPAE1 FI G 4 2. AMENDMENT/MODIFICATION NO. 3. EFFECTIVE DATE (MD Y) 4. REQUISITONPURC1-ASE REQ NO. 5. PROJECT NO. (ijappiceubc) 277 See Block 16C 6. ISSUED BY CODE 7. ADMINISTERED BY (If ther than Item 6) CODE U.S. Department of Energy Office of River Protection P. 0. Box 450, MIS 1-6-60 Richland, WA 99352 8. NAME AND ADDRESS OF CONTRACTOR (No. street, county, State and ZiI' code) 9A AMENDMENT OF SOLICITATION NO. Bechtel National, Inc. 9B. DATED 1 'SEE 171AM )) 2435 Stevens

  1. AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT I I CONTRACT 10 COCE

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    SPECrrrED 10THER AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT I I CONTRACT 10 COCE I PAGE OF PAGES 1 1 2 2 AMENDMENTIMODIFICATION NO J EFFECTIVE DATE ~ REOUISITIONiPURCHASE REO NO 15 PROJECT NO (/I BDP"ca04J) 0 83 See Bleck 16C 6 ISSUED BY CODE 00519 7 ADMINISTERED BY (/I ot"'" than Item 61 CODE 100519 Oak Ridge Oa~ Ridge U.S. Department of Energy U.S. Department of Energy ?O. Box 2001 P.O. Box 2001 Oak Ridge TN 37931 Oak Ridge TN 37931 e NAME AND AODRESS OF CONTRACTOR (No

  2. PDSF User Meeting 06-10-14.pptx

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    June 1 0, 2 014 Lisa Gerhardt Utilization --- 2 --- Past Outages * 5/13/14 ( all d ay): Q uarterly m aintenance * 6/02/14 - 6 /16/14 ( ish): G lobal s cratch a t 6 0% o f peak d ue t o r olling u pgrade Planned Outages * None Other Topics from PDSF Staff * NERSC i s m oving * Four s tory, 1 40,000 G SF - 300 o ffices o n t wo fl oors - 20K --- > 2 9Ksf H PC fl oor - 12.5MW --- > 4 2 M W t o b uilding * Located for collaboraOon - CRD a nd E Snet - UC B erkeley * ExcepOonal energy efficiency

  3. PDSF User Meeting 07-01-14.pptx

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    July 1 , 2 014 Lisa Gerhardt Utilization --- 2 --- Past Outages * 6/02/14 - 6 /24/14 ( ish): G lobal s cratch a t 6 0% o f peak d ue t o r olling u pgrade * 6/28/14 - n ow: P roject a t 8 0% o f p eak d ue t o hardware f ailure * 6/30/14 ( 2hours): Global scratch outage from hardware f ailure Planned Outages * Today ( all d ay): E SNet i s d oing m aintenance w ork on N ERSC b order, m ay s how u p a s a N ERSC---wide outage f or a bout 1 0 m inutes * 7/10/14 ( all d ay): p dsfdtn2 o ffline f or

  4. Thermal generation of spin current in epitaxial CoFe2O4 thin films

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Guo, Er -Jia; Herklotz, Andreas; Kehlberger, Andreas; Cramer, Joel; Jakob, Gerhard; Klaeui, Mathias

    2016-01-12

    The longitudinal spin Seebeck effect (LSSE) has been investigated in high-quality epitaxial CoFe2O4 (CFO) thin films. The thermally excited spin currents in the CFO films are electrically detected in adjacent Pt layers due to the inverse spin Hall effect (ISHE). The LSSE signal exhibits a linear increase with increasing temperature gradient, yielding a LSSE coefficient of –100 nV/K at room temperature. The temperature dependence of the LSSE is investigated from room temperature down to 30 K, showing a significant reduction at low temperatures, revealing that the total amount of thermally generated magnons decreases. Moreover, we demonstrate that the spin Seebeckmore » effect is an effective tool to study the magnetic anisotropy induced by epitaxial strain, especially in ultrathin films with low magnetic moments.« less

  5. NATIONAL GEOTHERMAL DATA SYSTEM (NGDS) GEOTHERMAL DATA DOMAIN: ASSESSMENT OF GEOTHERMAL COMMUNITY DATA NEEDS

    SciTech Connect (OSTI)

    Anderson, Arlene; Blackwell, David; Chickering, Cathy; Boyd, Toni; Horne, Roland; MacKenzie, Matthew; Moore, Joseph; Nickull, Duane; Richard, Stephen; Shevenell, Lisa A.

    2013-01-01

    To satisfy the critical need for geothermal data to ad- vance geothermal energy as a viable renewable ener- gy contender, the U.S. Department of Energy is in- vesting in the development of the National Geother- mal Data System (NGDS). This paper outlines efforts among geothermal data providers nationwide to sup- ply cutting edge geo-informatics. NGDS geothermal data acquisition, delivery, and methodology are dis- cussed. In particular, this paper addresses the various types of data required to effectively assess geother- mal energy potential and why simple links to existing data are insufficient. To create a platform for ready access by all geothermal stakeholders, the NGDS in- cludes a work plan that addresses data assets and re- sources of interest to users, a survey of data provid- ers, data content models, and how data will be ex- changed and promoted, as well as lessons learned within the geothermal community.

  6. Accelerating Geothermal Research (Fact Sheet), NREL (National Renewable Energy Laboratory)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Accelerating Geothermal Research Supporting a Cleaner Environment NREL is a strategic partner of the U.S. Department of Energy (DOE) Geothermal Technologies Office (GTO). NREL teams are leading the research and deployment efforts through various projects. Summaries of a few key activities follow. Geothermal-Solar Hybrids: The objective is to examine the viability of using solar thermal heat combined with geother- mal energy to improve plant efficiency and reduce cost. This project, performed by

  7. NERSC_ASCR_Requirements_Review-1.pptx

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Linear A lgebra A lgorithms o n High P erformance C omputers Jim Demmel UC B erkeley NERSC ASCR Requirements for 2017 January 15, 2014 LBNL Outline * Goal: i mproved w idely u sed l inear a lgebra (and o ther) l ibraries t o - Minimize d ata m ovement ( most e xpensive opera0on, m easured i n 0 me o r e nergy) - D evelop r eproducible v ersions - A utoma0cally d etermine m inimum p recision needed t o a Nain n eeded a ccuracy * What H W/SW f eatures d o w e n eed t o d o t his? 2.5D M atrix M

  8. Supporting Advanced Scientific Computing Research * Basic Energy Sciences * Biological

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Energy S ciences N etwork Enabling Virtual Science June 9, 2009 Steve C o/er steve@es.net Dept. H ead, E nergy S ciences N etwork Lawrence B erkeley N aDonal L ab The E nergy S ciences N etwork The D epartment o f E nergy's O ffice o f S cience i s o ne o f t he l argest s upporters o f basic r esearch i n t he p hysical s ciences i n t he U .S. * Directly s upports t he r esearch o f s ome 1 5,000 s cienDsts, p ostdocs a nd g raduate s tudents at D OE l aboratories, u niversiDes, o ther F

  9. Introduction

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    diverse and complex mosaic of plant and animal communities are found at the Nevada National Security Site. Representative of both the Mojave and Great Basin deserts, approximately 1,500 ani- mal species, including 924 species of insects, and 750 different kinds of plants are documented at the site. The varying elevations and climatic conditions at the test site contribute to the distribution of plant and animal communities. On the south end of the site, Jackass Flats lies at a low 2,688 feet

  10. SUSANA MARTINEZ Governor JOHN A. SANCHEZ Lieutenant Governor

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ENVlRONMENTDEPARTMENT Hazardous Waste Bureau 2905 Rodeo Park Drive East, Building 1 Santa Fe, New Mexico 87505-6303 Phone (505) 476-6000 Fax (505) 476-6030 IVww.nmenv.state.nm.us DAVE MARTIN Secretary BUTCH TONGATE Deputy Secretary CERTIFIED MAlL - RETURN RECEIPT REQUESTED May 30,2012 Jose R. Franco, Manager Carlsbad Field Office Department of Energy P. O. Box 3090 Carlsbad, New Mexico 88221-3090 M. FarokSharif Washington TRU Solutions LLC P. O. Box 2078 Carlsbad, New Mexico 88221-5608 RE:

  11. l[nterial &oratory the New York h'

    Office of Legacy Management (LM)

    l[nterial &oratory the New York h' ar&l Shipyard at Br&lyn, N. Y., to measure the neutron absorption chaxteristics ?f Tarious oyerlayys of fibergla& and resinous materials. R~TC&S Powder Co., Wilmington, Del., applied for a licerw to re- ceive and possess 25 gram3 of umnium (20 percent enrichment in uwnium 235) in the form of uranyl nitrate, for radiation chemistry osperiments. MalZnckrodt Chanical1Vork.q St. Low& ;Ilo., applied for 3 license to receive nnd possessup to

  12. dI UNIVERSITY OF NEV\DA SYSTEM

    Office of Legacy Management (LM)

    g3t4 6 dI UNIVERSITY OF NEV\DA SYSTEM tw ?r@ D O E / D P / O 1 2 6 3 - 2 0 L , n z l t P ' " WATER RESOURCES CENTER itf.l This report was prepared as an aecount of work sponsore$ by the United States Government. Neither the United States nor the United States Department of Energy, nor any of their employees, mal assumes any legal liability or responsib usefulness of any informationr apparatus' I that its use would not infringe privately speeifie eommereial produetr proeesst ufacturen, or

  13. pLS010 plasmid vector

    DOE Patents [OSTI]

    Lacks, Sanford A.; Balganesh, Tanjore S.

    1988-01-01

    Disclosed is recombinant plasmid pLS101, consisting essentially of a 2.0 Kb malM gene fragment ligated to a 4.4 Kb T.sub.c r DNA fragment, which is particularly useful for transforming Gram-positive bacteria. This plasmid contains at least four restriction sites suitable for inserting exogeneous gene sequences. Also disclosed is a method for plasmid isolation by penicillin selection, as well as processes for enrichment of recombinant plasmids in Gram-positive bacterial systems.

  14. Anaerobic High-Throughput Cultivation Method for Isolation of Thermophiles Using Biomass-Derived Substrates

    SciTech Connect (OSTI)

    Hamilton-Brehm, Scott; Vishnivetskaya, Tatiana A; Allman, Steve L; Mielenz, Jonathan R; Elkins, James G

    2012-01-01

    Flow cytometry (FCM) techniques have been developed for sorting mesophilic organisms, but the difficulty increases if the target microbes are thermophilic anaerobes. We demonstrate a reliable, high-throughput method of screening thermophilic anaerobic organisms using FCM and 96-well plates for growth on biomass-relevant substrates. The method was tested using the cellulolytic thermophiles Clostridium ther- mocellum (Topt = 55 C), Caldicellulosiruptor obsidiansis (Topt = 78 C) and the fermentative hyperthermo- philes, Pyrococcus furiosus (Topt = 100 C) and Thermotoga maritima (Topt = 80 C). Multi-well plates were incubated at various temperatures for approximately 72 120 h and then tested for growth. Positive growth resulting from single cells sorted into individual wells containing an anaerobic medium was verified by OD600. Depending on the growth substrate, up to 80 % of the wells contained viable cultures, which could be transferred to fresh media. This method was used to isolate thermophilic microbes from Rabbit Creek, Yellowstone National Park (YNP), Wyoming. Substrates for enrichment cultures including crystalline cellulose (Avicel), xylan (from Birchwood), pretreated switchgrass and Populus were used to cultivate organisms that may be of interest to lignocellulosic biofuel production.

  15. Reversible hydrogen storage materials

    DOE Patents [OSTI]

    Ritter, James A.; Wang, Tao; Ebner, Armin D.; Holland, Charles E.

    2012-04-10

    In accordance with the present disclosure, a process for synthesis of a complex hydride material for hydrogen storage is provided. The process includes mixing a borohydride with at least one additive agent and at least one catalyst and heating the mixture at a temperature of less than about 600.degree. C. and a pressure of H.sub.2 gas to form a complex hydride material. The complex hydride material comprises MAl.sub.xB.sub.yH.sub.z, wherein M is an alkali metal or group IIA metal, Al is the element aluminum, x is any number from 0 to 1, B is the element boron, y is a number from 0 to 13, and z is a number from 4 to 57 with the additive agent and catalyst still being present. The complex hydride material is capable of cyclic dehydrogenation and rehydrogenation and has a hydrogen capacity of at least about 4 weight percent.

  16. James L. Liveman, Acting AssLBtaOt

    Office of Legacy Management (LM)

    1 - * -w : L i P / ' 5- . . . c James L. Liveman, Acting AssLBtaOt Secretay for 2nv??Onnur_nt ( IQ UZT'ZXSI~ OF :ZZ&JA On Dctezher 6, 1977, and ridtcr E. smitil, Edward J . Jaacwsky , De?ar+nent of hrgarme SaCanal Laborawry (AS.), _- _. - - -zatzgy (DOE), visited tlhe University of iJeva&, Ekekay ScMal of %iaes. The purpose ___ was to dLscu!38 tke -8: opcraZ4Qns of tbcse fuCti'I?-'n= **-A-- A e fl' the v?L&gl: ~~ BHIC --c-r &atic . - . dtselopxzeat studies on vsrlous tppes of

  17. Magnetic structure of the antiferromagnetic Kondo lattice compounds CeRhAl4Si2 and CeIrAl4Si2

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Ghimire, N. J.; Calder, S.; Janoschek, M.; Bauer, E. D.

    2015-06-01

    In this article, we have investigated the magnetic ground state of the antiferromagnetic Kondo-lattice compounds CeMAl4Si2(M = Rh, Ir) using neutron powder diffraction. Although both of these compounds show two magnetic transitions TN1 and TN2 in the bulk properties measurements, evidence for magnetic long-range order was only found below the lower transition TN2. Analysis of the diffraction profiles reveals a commensurate antiferromagnetic structure with a propagation vector k = (0, 0, 1/2). The magnetic moment in the ordered state of CeRhAl4Si2 and CeIrAl4Si2 were determined to be 1.14(2) and 1.41(3) μB/Ce, respectively, and are parallel to the crystallographic c-axis inmore » agreement with magnetic susceptibility measurements.« less

  18. DIFFERENTIAL SPECTRUM OF NEUTRONS AT CHACALTAYA-BOLIVIA

    SciTech Connect (OSTI)

    Mayta, R.; Zanini, A.; Ticona, R.; Velarde, A.

    2009-04-30

    We describe the Neutron Spectrometer Experiment installed at Chacaltaya Cosmic Rays Observatory (68 deg. O, 16.2 deg. S), located in Bolivia, at 5230 m.a.s.l. This experimental system is constituted by passive detectors which register the flux of neutrons, in an energy range of 10 KeV-20 MeV. Using the unfolding code BUNTO a peak around 1 MeV of the characteristic spectrum of neutrons was obtained. Experimental values, observed during April of 2008, are compared with similar ones carried out in 1997 at the same place, in order to look for eventual changes due to local atmosphere. A similar experiment was also carried up at the Laboratory of Testa Grigia-Italy (45.56 deg. N, 7.42 deg. E,. 3480 m.a.l.s). Data of both stations allow us to compare the spectra in order to explain the difference of neutron flux of these two stations.

  19. Potential role of the Fast Flux Test Facility and the advanced test reactor in the U.S. tritium production system

    SciTech Connect (OSTI)

    Dautel, W.A.

    1996-10-01

    The Deparunent of Energy is currently engaged in a dual-track strategy to develop an accelerator and a conunercial light water reactor (CLWR) as potential sources of tritium supply. New analysis of the production capabilities of the Fast Flux Test Facility (FFTF) at the Hanford Site argues for considering its inclusion in the tritium supply,system. The use of the FFTF (alone or together with the Advanced Test Reactor [ATR] at the Idaho National Engineering Laboratory) as an integral part of,a tritium production system would help (1) ensure supply by 2005, (2) provide additional time to resolve institutional and technical issues associated with the- dual-track strategy, and (3) reduce discounted total life-cycle`costs and near-tenn annual expenditures for accelerator-based systems. The FFRF would also provide a way to get an early start.on dispositioning surplus weapons-usable plutonium as well as provide a source of medical isotopes. Challenges Associated With the Dual-Track Strategy The Departinent`s purchase of either a commercial reactor or reactor irradiation services faces challenging institutional issues associated with converting civilian reactors to defense uses. In addition, while the technical capabilities of the individual components of the accelerator have been proven, the entire system needs to be demonstrated and scaled upward to ensure that the components work toge ther 1548 as a complete production system. These challenges create uncertainty over the ability of the du2a-track strategy to provide an assured tritium supply source by 2005. Because the earliest the accelerator could come on line is 2007, it would have to operate at maximum capacity for the first few years to regenerate the reserves lost through radioactive decay aftei 2005.

  20. Radiolabeled technetium chelates for use in renal function determinations

    DOE Patents [OSTI]

    Fritzberg, Alan; Kasina, Sudhakar; Johnson, Dennis L.

    1990-01-01

    The present invention is directed to novel radiopharmaceutical imaging agents incorporating Tc-99m as a radiolabel. In particular, the novel imaging agents disclosed herein have relatively high renal extraction efficiencies, and hence are useful for conducting renal function imaging procedures. The novel Tc-99m compounds of a present invention have the following general formula: ##STR1## wherein X is S or N; and wherein Y is--H or wherein Y is ##STR2## and where R.sub.1 is --H, --CH.sub.3, or --CH.sub.2 CH.sub.3 ; R.sub.2 is --H, --CH.sub.2 CO.sub.2 H, --CH.sub.2 CONH.sub.2, --CH.sub.2 CH.sub.2 CO.sub.2 H, --CH.sub.2 CH.sub.2 CONH.sub.2, --CH.sub.3, --CH.sub.2 CH.sub.3, CH.sub.2 C.sub.6 H.sub.5, or --CH.sub.2 OH; and Z is --H, --CO.sub.2 H, --CONH.sub.2, --SO.sub.3 H, --SO.sub.2 NH.sub.2, or --CONHCH.sub.2 CO.sub.2 H; and the Tc is Tc-99m; and water-soluble salts thereof. Of the foregoing, the presently preferred Tc-99m compound of the present invention is Tc-99m-mercaptoacetylglycylglycylglycine (Tc-99m-MAGGG). The present invention is also directed to novel chelating agents that may be reacted with Tc-99m to form the foregoing compounds. Such novel chelating agents have the following general formula. ##STR3## where X and Y have the same definitions as above, and wherein Y' is --H.sub.2 when X is N, or wherein Y' is --H, or a suitable protective group such as --COCH.sub.3, --COC.sub.6 H.sub.5, --CH.sub.2 NHCOCH.sub.3, --COCF.sub.3, or --COCH.sub.2 OH when X is S. The present invention also provides methods for preparing and using the novel Tc-99m compounds.

  1. GIS-and Web-based Water Resource Geospatial Infrastructure for Oil Shale Development

    SciTech Connect (OSTI)

    Zhou, Wei; Minnick, Matthew; Geza, Mengistu; Murray, Kyle; Mattson, Earl

    2012-09-30

    The Colorado School of Mines (CSM) was awarded a grant by the National Energy Technology Laboratory (NETL), Department of Energy (DOE) to conduct a research project en- titled GIS- and Web-based Water Resource Geospatial Infrastructure for Oil Shale Development in October of 2008. The ultimate goal of this research project is to develop a water resource geo-spatial infrastructure that serves as “baseline data” for creating solutions on water resource management and for supporting decisions making on oil shale resource development. The project came to the end on September 30, 2012. This final project report will report the key findings from the project activity, major accomplishments, and expected impacts of the research. At meantime, the gamma version (also known as Version 4.0) of the geodatabase as well as other various deliverables stored on digital storage media will be send to the program manager at NETL, DOE via express mail. The key findings from the project activity include the quantitative spatial and temporal distribution of the water resource throughout the Piceance Basin, water consumption with respect to oil shale production, and data gaps identified. Major accomplishments of this project include the creation of a relational geodatabase, automated data processing scripts (Matlab) for database link with surface water and geological model, ArcGIS Model for hydrogeologic data processing for groundwater model input, a 3D geological model, surface water/groundwater models, energy resource development systems model, as well as a web-based geo-spatial infrastructure for data exploration, visualization and dissemination. This research will have broad impacts of the devel- opment of the oil shale resources in the US. The geodatabase provides a “baseline” data for fur- ther study of the oil shale development and identification of further data collection needs. The 3D geological model provides better understanding through data interpolation and visualization techniques of the Piceance Basin structure spatial distribution of the oil shale resources. The sur- face water/groundwater models quantify the water shortage and better understanding the spatial distribution of the available water resources. The energy resource development systems model reveals the phase shift of water usage and the oil shale production, which will facilitate better planning for oil shale development. Detailed descriptions about the key findings from the project activity, major accomplishments, and expected impacts of the research will be given in the sec- tion of “ACCOMPLISHMENTS, RESULTS, AND DISCUSSION” of this report.

  2. Modeling Improvements for Air Source Heat Pumps using Different Expansion Devices at Varied Charge Levels Part II

    SciTech Connect (OSTI)

    Shen, Bo [ORNL

    2011-01-01

    This paper describes steady-state performance simulations performed on a 3-ton R-22 split heat pump in heating mode. In total, 150 steady-state points were simulated, which covers refrigerant charge levels from 70 % to 130% relative to the nominal value, the outdoor temperatures at 17 F (-8.3 C), 35 F (1.7 C) and 47 F (8.3 C), indoor air flow rates from 60% to 150% of the rated air flow rate, and two types of expansion devices (fixed orifice and thermostatic expansion valve). A charge tuning method, which is to calibrate the charge inventory model based on measurements at two operation conditions, was applied and shown to improve the system simulation accuracy significantly in an extensive range of charge levels. In addition, we discuss the effects of suction line accumulator in modeling a heat pump system using either a fixed orifice or thermal expansion valve. Last, we identify the issue of refrigerant mass flow mal-distribution at low charge levels and propose an improved modeling approach.

  3. Structural, magnetic, and electronic properties of the Co-Fe-Al oxide spinel system: Density-functional theory calculations

    SciTech Connect (OSTI)

    Walsh, Aron; Wei, S.-H.; Yan Yanfa; Al-Jassim, M. M.; Turner, John A.; Woodhouse, Michael; Parkinson, B. A.

    2007-10-15

    A systematic study of nine binary and ternary spinel oxides formed from Co, Al, and Fe is presented by means of density functional theory. Analysis of the structural, magnetic, and electronic properties through the series of materials is carried out. Preference for the octahedral spinel sites are found in the order FeMAl{sub 2}O{sub 4} as the octahedral M metal sites are lost. However, for stoichiometric FeAl{sub 2}O{sub 4}, the unsatisfied valence state of Fe results in partial occupation of the conduction band. The results and chemical trends are discussed in terms of atomic site and orbital energies, and in relation to potential photoelectrolysis activity for the splitting of water as a renewable means of hydrogen production.

  4. Improved layered mixed transition metal oxides for Li-ion batteries

    SciTech Connect (OSTI)

    Doeff, Marca M.; Conry, Thomas; Wilcox, James

    2010-03-05

    Recent work in our laboratory has been directed towards development of mixed layered transition metal oxides with general composition Li[Ni, Co, M, Mn]O2 (M=Al, Ti) for Li ion battery cathodes. Compounds such as Li[Ni1/3Co1/3Mn1/3]O2 (often called NMCs) are currently being commercialized for use in consumer electronic batteries, but the high cobalt content makes them too expensive for vehicular applications such as electric vehicles (EV), plug-in hybrid electric vehicles (PHEVs), or hybrid electric vehicles (HEVs). To reduce materials costs, we have explored partial or full substitution of Co with Al, Ti, and Fe. Fe substitution generally decreases capacity and results in poorer rate and cycling behavior. Interestingly, low levels of substitution with Al or Ti improve aspects of performance with minimal impact on energy densities, for some formulations. High levels of Al substitution compromise specific capacity, however, so further improvements require that the Ni and Mn content be increased and Co correspondingly decreased. Low levels of Al or Ti substitution can then be used offset negative effects induced by the higher Ni content. The structural and electrochemical characterization of substituted NMCs is presented in this paper.

  5. The Impact of Aluminum and Iron Substitution on the Structure and Electrochemistry of Li[Ni0.4Co0.2-yMyMn0.4]O2 Materials

    SciTech Connect (OSTI)

    WIlcox, James D.; Rodriguez, Efrain E.; Doeff, Marca M.

    2009-07-23

    Li[Ni0.4Co0.2-yMyMn0.4]O2 (0<_y<_0.2) (M=Al) and Li[Ni0.4Co0.15Fe0.05Mn0.4]O2 compounds were prepared in order to investigate the effect of replacement of all or part of the cobalt on the structural and electrochemical properties. The impact of substitution on the structure has been examined by both x-ray and neutron diffraction experiments. The incorporation of aluminum has minimal effect on the anti-site defect concentration, but leads to structural changes that affect electrochemical performance. The most important effect is an opening of the lithium slab dimension upon substitution, which results in improved rate performance compared to the parent compound. In contrast, the lithium slab dimension is not affected by iron substitution and no rate enhancement effect is observed. The cycling stability of aluminum containing materials is superior to both the parent material and iron-substituted materials.

  6. Cybersim: geographic, temporal, and organizational dynamics of malware propagation

    SciTech Connect (OSTI)

    Santhi, Nandakishore; Yan, Guanhua; Eidenbenz, Stephan

    2010-01-01

    Cyber-infractions into a nation's strategic security envelope pose a constant and daunting challenge. We present the modular CyberSim tool which has been developed in response to the need to realistically simulate at a national level, software vulnerabilities and resulting mal ware propagation in online social networks. CyberSim suite (a) can generate realistic scale-free networks from a database of geocoordinated computers to closely model social networks arising from personal and business email contacts and online communities; (b) maintains for each,bost a list of installed software, along with the latest published vulnerabilities; (d) allows designated initial nodes where malware gets introduced; (e) simulates, using distributed discrete event-driven technology, the spread of malware exploiting a specific vulnerability, with packet delay and user online behavior models; (f) provides a graphical visualization of spread of infection, its severity, businesses affected etc to the analyst. We present sample simulations on a national level network with millions of computers.

  7. MCrAlY bond coat with enhanced Yttrium layer

    DOE Patents [OSTI]

    Jablonski, Paul D; Hawk, Jeffrey A

    2015-04-21

    One or more embodiments relates to an MCrAlY bond coat comprising an MCrAlY layer in contact with a Y--Al.sub.2O.sub.3 layer. The MCrAlY layer is comprised of a .gamma.-M solid solution, a .beta.-MAl intermetallic phase, and Y-type intermetallics. The Y--Al.sub.2O.sub.3 layer is comprised of Yttrium atoms coordinated with oxygen atoms comprising the Al.sub.2O.sub.3 lattice. Both the MCrAlY layer and the Y--Al.sub.2O.sub.3 layer have a substantial absence of Y--Al oxides, providing advantage in the maintainability of the Yttrium reservoir within the MCrAlY bulk. The MCrAlY bond coat may be fabricated through application of a Y.sub.2O.sub.3 paste to an MCrAlY material, followed by heating in a non-oxidizing environment.

  8. Magnetic structure of the antiferromagnetic Kondo lattice compounds CeRhAl4Si2 and CeIrAl4Si2

    SciTech Connect (OSTI)

    Ghimire, N. J.; Calder, S.; Janoschek, M.; Bauer, E. D.

    2015-06-01

    In this article, we have investigated the magnetic ground state of the antiferromagnetic Kondo-lattice compounds CeMAl4Si2(M = Rh, Ir) using neutron powder diffraction. Although both of these compounds show two magnetic transitions TN1 and TN2 in the bulk properties measurements, evidence for magnetic long-range order was only found below the lower transition TN2. Analysis of the diffraction profiles reveals a commensurate antiferromagnetic structure with a propagation vector k = (0, 0, 1/2). The magnetic moment in the ordered state of CeRhAl4Si2 and CeIrAl4Si2 were determined to be 1.14(2) and 1.41(3) ?B/Ce, respectively, and are parallel to the crystallographic c-axis in agreement with magnetic susceptibility measurements.

  9. Flow distribution analysis on the cooling tube network of ITER thermal shield

    SciTech Connect (OSTI)

    Nam, Kwanwoo; Chung, Wooho; Noh, Chang Hyun; Kang, Dong Kwon; Kang, Kyoung-O; Ahn, Hee Jae; Lee, Hyeon Gon

    2014-01-29

    Thermal shield (TS) is to be installed between the vacuum vessel or the cryostat and the magnets in ITER tokamak to reduce the thermal radiation load to the magnets operating at 4.2K. The TS is cooled by pressurized helium gas at the inlet temperature of 80K. The cooling tube is welded on the TS panel surface and the composed flow network of the TS cooling tubes is complex. The flow rate in each panel should be matched to the thermal design value for effective radiation shielding. This paper presents one dimensional analysis on the flow distribution of cooling tube network for the ITER TS. The hydraulic cooling tube network is modeled by an electrical analogy. Only the cooling tube on the TS surface and its connecting pipe from the manifold are considered in the analysis model. Considering the frictional factor and the local loss in the cooling tube, the hydraulic resistance is expressed as a linear function with respect to mass flow rate. Sub-circuits in the TS are analyzed separately because each circuit is controlled by its own control valve independently. It is found that flow rates in some panels are insufficient compared with the design values. In order to improve the flow distribution, two kinds of design modifications are proposed. The first one is to connect the tubes of the adjacent panels. This will increase the resistance of the tube on the panel where the flow rate is excessive. The other design suggestion is that an orifice is installed at the exit of tube routing where the flow rate is to be reduced. The analysis for the design suggestions shows that the flow mal-distribution is improved significantly.

  10. STUDIES ON TWO CLASSES OF POSITIVE ELECTRODE MATERIALS FOR LITHIUM-ION BATTERIES

    SciTech Connect (OSTI)

    Wilcox, James D.

    2008-12-18

    The development of advanced lithium-ion batteries is key to the success of many technologies, and in particular, hybrid electric vehicles. In addition to finding materials with higher energy and power densities, improvements in other factors such as cost, toxicity, lifetime, and safety are also required. Lithium transition metal oxide and LiFePO{sub 4}/C composite materials offer several distinct advantages in achieving many of these goals and are the focus of this report. Two series of layered lithium transition metal oxides, namely LiNi{sub 1/3}Co{sub 1/3-y}M{sub y}Mn{sub 1/3}O{sub 2} (M=Al, Co, Fe, Ti) and LiNi{sub 0.4}Co{sub 0.2-y}M{sub y}Mn{sub 0.4}O{sub 2} (M = Al, Co, Fe), have been synthesized. The effect of substitution on the crystal structure is related to shifts in transport properties and ultimately to the electrochemical performance. Partial aluminum substitution creates a high-rate positive electrode material capable of delivering twice the discharge capacity of unsubstituted materials. Iron substituted materials suffer from limited electrochemical performance and poor cycling stability due to the degradation of the layered structure. Titanium substitution creates a very high rate positive electrode material due to a decrease in the anti-site defect concentration. LiFePO{sub 4} is a very promising electrode material but suffers from poor electronic and ionic conductivity. To overcome this, two new techniques have been developed to synthesize high performance LiFePO{sub 4}/C composite materials. The use of graphitization catalysts in conjunction with pyromellitic acid leads to a highly graphitic carbon coating on the surface of LiFePO{sub 4} particles. Under the proper conditions, the room temperature electronic conductivity can be improved by nearly five orders of magnitude over untreated materials. Using Raman spectroscopy, the improvement in conductivity and rate performance of such materials has been related to the underlying structure of the carbon films. The combustion synthesis of LiFePO4 materials allows for the formation of nanoscale active material particles with high-quality carbon coatings in a quick and inexpensive fashion. The carbon coating is formed during the initial combustion process at temperatures that exceed the thermal stability limit of LiFePO{sub 4}. The olivine structure is then formed after a brief calcination at lower temperatures in a controlled environment. The carbon coating produced in this manner has an improved graphitic character and results in superior electrochemical performance. The potential co-synthesis of conductive carbon entities, such as carbon nanotubes and fibers, is also briefly discussed.