Sample records for ag io ir

  1. Storage and IO Technology

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

    Burst Buffer User Defined Images Archive Home R & D Storage and IO Technologies Storage and IO Technologies Burst Buffer NVRAM and Burst Buffer Use Cases In collaboration...

  2. I/O Test

    E-Print Network [OSTI]

    Beeler, Michael

    1967-10-01T23:59:59.000Z

    IO TEST is intended as a hardware testing and debugging aid for use with the PDP-6 and its associated input multiplexer (analog to digital converter) and output multiplexer (digital to analog converter). While all characters ...

  3. I/O Library List

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

    IO Library List IO Library List Package Platform Version Module Install Date Date Made Default ADIOS plain edison 1.4.1 adiosplain1.4.1 2013-01-22 2013-01-22 boost babbage...

  4. Praxis I/O package

    SciTech Connect (OSTI)

    Holloway, F.W.; Sherman, T.A.

    1988-04-07T23:59:59.000Z

    The Praxis language specification, like Algol and Ada, does not specify any I/O statements. The intent was to provide a standard I/O package as a companion to the compiler. This would allow the user to substitute, or supplement, the I/O package, as needed, for specialized applications. Like Algol, however, Praxis provided only limited (text) I/O for several years. Ada, in contrast, provided a comprehensive standard I/O package from its inception. Digital Equipment Corporation's (DEC's) implementation of Ada, on their VAX family of computers, further supplemented this package with other packages which exploit the I/O facilities available under the VMS operating system. The Praxis I/O package described in this document has been modeled after DEC's implementation of Ada and provides a similar set of I/O facilities. Currently, the I/O package is supported only under VAX/VMS. The design of the package, however, is essentially independent of any operating system (with the exception of the module COMMAND IO). The VAX/VMS version of the I/O package fully exploits the vast I/O facilities which are provided under VAX/VMS and makes them directly available to the Praxis programmer. The design, prototype implementation, and draft documentation of the Praxis I/O Package was done by Tim Sherman as part of a University project in computer science. Subsequent work by both Tim and Fred Holloway lead to a more complete implementation, testing and development of example programs, and inclusion of the package into the Praxis compilers as their principal interface to RMS and VMS.

  5. Cray IO COE

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power Administration would likeConstitution4 Department of Energy CarlsbadWinter Cray BugIO COE

  6. IO Performance of a ClimateIO Performance of a Climate Modeling ApplicationModeling Application

    E-Print Network [OSTI]

    - filling curve 6Figures from Bruce Palmer & Karen Schuchardt (PNNL) / Charlotte DeMott (CSU) #12) #12;Tuning the IO patternTuning the IO pattern 10 Baseline from PNNL Katie Antypas reconfigures MPI (MPIPerformance issues (MPI--IO)IO) MPI-IO synchronous issue affects pNetCDF and GCRM API Introduced PNNL group

  7. I/O Resources for Scientific Applications

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

    Resources for Scientific Applications at NERSC IO Resources for Scientific Applications at NERSC Introduction NERSC provides a range of online resources to assist users...

  8. Trilinos I/O Support (Trios)

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

    Oldfield, Ron A.; Sjaardema, Gregory D.; Lofstead II, Gerald F.; Kordenbrock, Todd

    2012-01-01T23:59:59.000Z

    Trilinos I/O Support (Trios) is a new capability area in Trilinos that serves two important roles: (1) it provides and supports I/O libraries used by in-production scientific codes; (2) it provides a research vehicle for the evaluation and distribution of new techniques to improve I/O on advanced platforms. This paper provides a brief overview of the production-grade I/O libraries in Trios as well as some of the ongoing research efforts that contribute to the experimental libraries in Trios.

  9. I/O Library List

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Science (SC) EnvironmentalGyroSolé(tm)Hydrogen Storage inChang Curriculum Vitae' NetCDF ROOT I/O

  10. Scaling Parallel I/O Performance through I/O Delegate and Caching System

    E-Print Network [OSTI]

    Kuzmanovic, Aleksandar

    Scaling Parallel I/O Performance through I/O Delegate and Caching System Arifa Nisar, Wei-keng Liao performance. Such applications periodically offload checkpointing data to file system for post't allow overall performance to scale with increasing number of processors. To bridge the gap between

  11. -0STATE OF CALIFORNIA DATEB-IO-\\\\

    E-Print Network [OSTI]

    DEVELOPMENT COMMISSION In the Matter of: ) ) ENERGY COMMISSION ORDER ) ) Order No. 11-0810-3 Energy related to the Energy Commission's role in assisting local governments with energy-related land useDOCKET -0STATE OF CALIFORNIA DATEB-IO-\\\\ STATE ENERGY RESOURCES CONSERVATIO REeD. 9-\\\\-,\\AND

  12. I/O Libraries at NERSC

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Science (SC) EnvironmentalGyroSolé(tm)Hydrogen Storage inChang Curriculum Vitae' NetCDF ROOT I/O

  13. Adding Parallel I/O to PARA-BMU

    E-Print Network [OSTI]

    Johnson, Nick; Bethune, Iain

    2012-10-01T23:59:59.000Z

    VOX-FE is a voxel-based bone modelling suite. The solver part of the suite - PARA-BMU - currently uses only serial I/O routines which lead to poor scalability. We enhance the code by adding parallel I/O routines based on the netCDF and HDF5...

  14. Remote I/O : fast access to distant storage.

    SciTech Connect (OSTI)

    Foster, I.; Kohr, D., Jr.; Krishnaiyer, R.; Mogill, J.

    1997-12-17T23:59:59.000Z

    As high-speed networks make it easier to use distributed resources, it becomes increasingly common that applications and their data are not colocated. Users have traditionally addressed this problem by manually staging data to and from remote computers. We argue instead for a new remote I/O paradigm in which programs use familiar parallel I/O interfaces to access remote file systems. In addition to simplifying remote execution, remote I/O can improve performance relative to staging by overlapping computation and data transfer or by reducing communication requirements. However, remote I/O also introduces new technical challenges in the areas of portability, performance, and integration with distributed computing systems. We propose techniques designed to address these challenges and describe a remote I/O library called RIO that we have developed to evaluate the effectiveness of these techniques. RIO addresses issues of portability by adopting the quasi-standard MPI-IO interface and by defining a RIO device and RIO server within the ADIO abstract I/O device architecture. It addresses performance issues by providing traditional I/O optimizations such as asynchronous operations and through implementation techniques such as buffering and message forwarding to off load communication overheads. RIO uses the Nexus communication library to obtain access to configuration and security mechanisms provided by the Globus wide area computing tool kit. Microbenchmarks and application experiments demonstrate that our techniques achieve acceptable performance in most situations and can improve turnaround time relative to staging.

  15. CAN-Ethernet gateway (IoT) (IPsec)

    E-Print Network [OSTI]

    Jang, Ju-Wook

    (IoT) IPv6 Network IoT(interoperability) CAN LTE3G Home network RFID Industry network Metro , device IPv4 #12; Smart device IPv6 IPv6 network (Access Address Identifier(AAID) ) AAID gateway AAID IPv6 mapping (hash AAID-IPv6 ) #12; industrial markets building automation market (CAN

  16. Parallel I/O Software Infrastructure for Large-Scale Systems

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

    Parallel IO Software Infrastructure for Large-Scale Systems Parallel IO Software Infrastructure for Large-Scale Systems | Tags: Math & Computer Science Choudhary.png An...

  17. An Optimizing Compiler for Petascale I/O on Leadership Class...

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

    Petascale IO on Leadership Class Architectures Re-direct Destination: In high-performance computing systems, parallel IO architectures usually have very complex hierarchies...

  18. Optimally Robust Kalman Filtering at Work: AO-, IO-, and Simultaneously IO-and AO-Robust Filters

    E-Print Network [OSTI]

    Ruckdeschel, Peter

    Optimally Robust Kalman Filtering at Work: AO-, IO-, and Simultaneously IO- and AO- Robust Filters Abstract We take up optimality results for robust Kalman filtering from Ruckdeschel (2001, 2010) where. (2006), Fried et al. (2007). Keywords: robustness, Kalman Filter, innovation outlier, additive outlier

  19. IR Hot Wave

    SciTech Connect (OSTI)

    Graham, T. B.

    2010-04-01T23:59:59.000Z

    The IR Hot Wave{trademark} furnace is a breakthrough heat treatment system for manufacturing metal components. Near-infrared (IR) radiant energy combines with IR convective heating for heat treating. Heat treatment is an essential process in the manufacture of most components. The controlled heating and cooling of a metal or metal alloy alters its physical, mechanical, and sometimes chemical properties without changing the object's shape. The IR Hot Wave{trademark} furnace offers the simplest, quickest, most efficient, and cost-effective heat treatment option for metals and metal alloys. Compared with other heat treatment alternatives, the IR Hot Wave{trademark} system: (1) is 3 to 15 times faster; (2) is 2 to 3 times more energy efficient; (3) is 20% to 50% more cost-effective; (4) has a {+-}1 C thermal profile compared to a {+-}10 C thermal profile for conventional gas furnaces; and (5) has a 25% to 50% smaller footprint.

  20. AGS experiments -- 1995, 1996 and 1997

    SciTech Connect (OSTI)

    Depken, J.C.; Presti, P.L.

    1997-12-01T23:59:59.000Z

    This report contains (1) FY 1995 AGS schedule as run; (2) FY 1996 AGS schedule as run; (3) FY 1997 AGS schedule as run; (4) FY 1998--1999 AGS schedule (proposed); (5) AGS beams 1997; (6) AGS experimental area FY 1995 physics program; (7) AGS experimental area FY 1996 physics program; (8) AGS experimental area FY 1997 physics program; (9) AGS experimental area FY 1998--1999 physics program (proposed); (10) a listing of experiments by number; (11) two-page summaries of each experiment, in order by number; and (12) listing of publications of AGS experiments.

  1. AGS experiments -- 1991, 1992, 1993. Tenth edition

    SciTech Connect (OSTI)

    Depken, J.C.

    1994-04-01T23:59:59.000Z

    This report contains: (1) FY 1993 AGS schedule as run; (2) FY 1994--95 AGS schedule; (3) AGS experiments {ge} FY 1993 (as of 30 March 1994); (4) AGS beams 1993; (5) AGS experimental area FY 1991 physics program; (6) AGS experimental area FY 1992 physics program; (7) AGS experimental area FY 1993 physics program; (8) AGS experimental area FY 1994 physics program (planned); (9) a listing of experiments by number; (10) two-page summaries of each experiment; (11) listing of publications of AGS experiments; and (12) listing of AGS experiments.

  2. I/O Performance of Virtualized Cloud Environments

    SciTech Connect (OSTI)

    Ghoshal, Devarshi; Canon, Shane; Ramakrishnan, Lavanya

    2011-11-03T23:59:59.000Z

    The scientific community is exploring the suitability of cloud infrastructure to handle High Performance Computing (HPC) applications. The goal of Magellan, a project funded through DOE ASCR, is to investigate the potential role of cloud computing to address the computing needs of the Department of Energy?s Office of Science, especially for mid-range computing and data-intensive applications which are not served through existing DOE centers today. Prior work has shown that applications with significant communication orI/O tend to perform poorly in virtualized cloud environments. However, there is a limited understanding of the I/O characteristics in virtualized cloud environments. This paper will present our results in benchmarking the I/O performance over different cloud and HPC platforms to identify the major bottlenecks in existing infrastructure. We compare the I/O performance using IOR benchmark on two cloud platforms - Amazon and Magellan. We analyze the performance of different storage options available, different instance types in multiple availability zones. Finally, we perform large-scale tests in order to analyze the variability in the I/O patterns over time and region. Our results highlight the overhead and variability in I/O performance on both public and private cloud solutions. Our results will help applications decide between the different storage options enabling applications to make effective choices.

  3. IR Kuiper Belt Constraints

    E-Print Network [OSTI]

    Teplitz, V L; Anderson, J D; Rosenbaum, D C; Scalise, R J; Wentzler, P; Teplitz, Vigdor L.; Anderson, John D.; Rosenbaum, Doris; Scalise, Randall J.; Wentzler, Paul

    1999-01-01T23:59:59.000Z

    We compute the temperature and IR signal of particles of radius $a$ and albedo $\\alpha$ at heliocentric distance $R$, taking into account the emissivity effect, and give an interpolating formula for the result. We compare with analyses of COBE DIRBE data by others (including recent detection of the cosmic IR background) for various values of heliocentric distance, $R$, particle radius, $a$, and particle albedo, $\\alpha$. We then apply these results to a recently-developed picture of the Kuiper belt as a two-sector disk with a nearby, low-density sector (40IR spectra for various parameter v...

  4. Atomic oxygen flux determined by mixed-phase Ag/Ag2O deposition...

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

    oxygen flux determined by mixed-phase AgAg2O deposition. Atomic oxygen flux determined by mixed-phase AgAg2O deposition. Abstract: The flux of atomic oxygen generated in a...

  5. Efficiency improvement of phosphorescent organic light-emitting diodes using semitransparent Ag as anode

    E-Print Network [OSTI]

    Efficiency improvement of phosphorescent organic light-emitting diodes using semitransparent Ag The emission efficiency in an organic light-emitting diode OLED based on fac tris phenyl pyridine iridium Ir current efficiency of 81 cd/A and a power efficiency of 79 lm/W, compared with 46 cd/A and 39 lm

  6. U-165: Apple iOS Bugs Let Remote Users Execute Arbitrary Code...

    Office of Environmental Management (EM)

    5: Apple iOS Bugs Let Remote Users Execute Arbitrary Code and Spoof Address Bar URLs U-165: Apple iOS Bugs Let Remote Users Execute Arbitrary Code and Spoof Address Bar URLs May 9,...

  7. U-121: Apple iOS Bugs Let Remote Users Execute Arbitrary Code...

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

    21: Apple iOS Bugs Let Remote Users Execute Arbitrary Code, Conduct Cross-Site Scripting Attacks, and Obtain Potentially Sensitive Information U-121: Apple iOS Bugs Let Remote...

  8. AgFoodTradeAgFoodTrade New Issues in Agricultural,New Issues in Agricultural,

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    AgFoodTradeAgFoodTrade New Issues in Agricultural,New Issues in Agricultural, Food & Bioenergy TradeFood & Bioenergy Trade AgFoodTradeAgFoodTrade New Issues in Agricultural,New Issues in Agricultural, Food & Bioenergy TradeFood & Bioenergy Trade AgFoodTradeAgFoodTrade New Issues in Agricultural

  9. Evaluating Memory Energy Efficiency in Parallel I/O Workloads

    E-Print Network [OSTI]

    Zhu, Yifeng

    Evaluating Memory Energy Efficiency in Parallel I/O Workloads Jianhui Yue,Yifeng Zhu , Zhao Cai the ever- widening gap between disk and processor speeds, memory energy efficiency becomes an increasingly management policies heavily influence the overall memory energy efficiency. In partic- ular, under the same

  10. I High-Performance I/O for Massively Parallel

    E-Print Network [OSTI]

    Kuzmanovic, Aleksandar

    -100 files/run. 20-200 MBps. l-10 Gbytes. HiPPl bandwidths minimum. 1 Tbyte. Secondary I/O bandwidth disk, 50-100 MBps disk to 3-inch storage (comparable to HiPPl/Ultra). 1 Tbyte. 0.5 GBps to disk, 45

  11. import java.io.IOException; import java.net.URI;

    E-Print Network [OSTI]

    Ricci, Laura

    import java.io.IOException; import java.net.URI; import java.util.Enumeration; import net.jxta.discovery.DiscoveryService; import net.jxta.document.AdvertisementFactory; import net.jxta.document.Element; import net.jxta.document.MimeMediaType; import net.jxta.document.StructuredDocument; import net.jxta.document.StructuredDocumentFactory; import

  12. T-676: Apple iOS Certificate Chain Validation Flaw Lets Certain...

    Energy Savers [EERE]

    or modify SSLTLS sessions. PLATFORM: iOS 4.2.5 through 4.2.9 for iPhone 4 (CDMA) iOS 3.0 through 4.3.4 for iPhone 3GS and iPhone 4 (GSM) iOS 3.1 through 4.3.4 for iPod touch...

  13. Enforcing I/O sequences for PLC validation purposes Anais Guignard

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Enforcing I/O sequences for PLC validation purposes Anais Guignard Automated Production Research Validation of the behavior of a Programmable Logic Controller (PLC) by comparison of observed I/O se- quences to sequences built from a formal specification model requires that the consequences of the PLC I/O scan- ning

  14. Advanced I/O for large-scale scientific applications.

    SciTech Connect (OSTI)

    Klasky, Scott (Oak Ridge National Laboratory, Oak Ridge, TN); Schwan, Karsten (Georgia Institute of Technology, Atlanta, GA); Oldfield, Ron A.; Lofstead, Gerald F., II (Georgia Institute of Technology, Atlanta, GA)

    2010-01-01T23:59:59.000Z

    As scientific simulations scale to use petascale machines and beyond, the data volumes generated pose a dual problem. First, with increasing machine sizes, the careful tuning of IO routines becomes more and more important to keep the time spent in IO acceptable. It is not uncommon, for instance, to have 20% of an application's runtime spent performing IO in a 'tuned' system. Careful management of the IO routines can move that to 5% or even less in some cases. Second, the data volumes are so large, on the order of 10s to 100s of TB, that trying to discover the scientifically valid contributions requires assistance at runtime to both organize and annotate the data. Waiting for offline processing is not feasible due both to the impact on the IO system and the time required. To reduce this load and improve the ability of scientists to use the large amounts of data being produced, new techniques for data management are required. First, there is a need for techniques for efficient movement of data from the compute space to storage. These techniques should understand the underlying system infrastructure and adapt to changing system conditions. Technologies include aggregation networks, data staging nodes for a closer parity to the IO subsystem, and autonomic IO routines that can detect system bottlenecks and choose different approaches, such as splitting the output into multiple targets, staggering output processes. Such methods must be end-to-end, meaning that even with properly managed asynchronous techniques, it is still essential to properly manage the later synchronous interaction with the storage system to maintain acceptable performance. Second, for the data being generated, annotations and other metadata must be incorporated to help the scientist understand output data for the simulation run as a whole, to select data and data features without concern for what files or other storage technologies were employed. All of these features should be attained while maintaining a simple deployment for the science code and eliminating the need for allocation of additional computational resources.

  15. A novel polythreading Ag(I) coordination polymer with blue photoluminescence

    SciTech Connect (OSTI)

    Duan, Xian-Ying, E-mail: dxynumber@163.com [State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093 (China); Institute of Chemistry, Henan Academy of Sciences, Zhengzhou 450002 (China); Yao, Jing; Lu, Chang-Sheng [State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093 (China); Meng, Qing-Jin, E-mail: mengqj@nju.edu.cn [State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093 (China)

    2013-04-15T23:59:59.000Z

    One new compound, [Ag(p-bix)]{sub 3}[Ag(Hbtc){sub 2}]2H{sub 2}O (H{sub 3}btc=1,2,4-benzenetricarboxylate, p-bix=1,4-bis(imidazol-1-ylmethyl)-benzene), has been synthesized under hydrothermal conditions and characterized by elemental analysis, IR, PXRD, luminescent analysis, and single-crystal X-ray diffraction. X-ray structural analysis revealed that 0-D unit [Ag(Hbtc){sub 2}]{sup 3?} and two kinds of 1-D linear chain [Ag(p-bix)]{sub ?}{sup +}, can be found within the crystal structure. The combination of 0-D [Ag(Hbtc){sub 2}]{sup 3?} unit and 1-D undulated chain [Ag1(p{sub 1}-bix)]{sub ?}{sup +} through weak AgO bond gave rise to 2-D anionic supramolecular doublelayer. Then the grids of the 2-D layer are threaded by 1-D linear cationic chain [Ag2(p{sub 2}-bix)]{sub ?}{sup +} to generate entangled 3-D architecture with unusual poly(pseudo-rotaxane)-type arrangements. Luminescent properties of the title complex were also studied in this paper. - Graphical abstract: Novel 3D polythreading supramolecular architecture was constructed, in which 1D linear cationic chains [Ag(p{sub 2}-bix)]{sub ?}{sup +} threaded into the grid of weak AgO bonded anionic 2D sheet. Highlights: ? Novel 1D{sup +}+2D{sup ?}?3D polythreading coordination complex was reported. ? Diverse conformations of p-bix result in different 1D [Ag(p-bix)]{sub ?}{sup +} chains. ? The title complex displayed blue photoluminescence at room temperature.

  16. Spin dynamics simulations at AGS

    SciTech Connect (OSTI)

    Huang, H.; MacKay, W.W.; Meot, F.; Roser, T.

    2010-05-23T23:59:59.000Z

    To preserve proton polarization through acceleration, it is important to have a correct model of the process. It has been known that with the insertion of the two helical partial Siberian snakes in the Alternating Gradient Synchrotron (AGS), the MAD model of AGS can not deal with a field map with offset orbit. The stepwise ray-tracing code Zgoubi provides a tool to represent the real electromagnetic fields in the modeling of the optics and spin dynamics for the AGS. Numerical experiments of resonance crossing, including spin dynamics in presence of the snakes and Q-jump, have been performed in AGS lattice models, using Zgoubi. This contribution reports on various results so obtained.

  17. OPAL: An Open-Source MPI-IO Library over Cray XT

    SciTech Connect (OSTI)

    Yu, Weikuan [ORNL; Vetter, Jeffrey S [ORNL; Canon, Richard Shane [ORNL

    2007-01-01T23:59:59.000Z

    Parallel IO over Cray XT is supported by a vendor-supplied MPI-IO package. This package contains a proprietary ADIO implementation built on top of the sysio library. While it is reasonable to maintain a stable code base for application scientists' convenience, it is also very important to the system developers and researchers to analyze and assess the effectiveness of parallel IO software, and accordingly, tune and optimize the MPI-IO implementation. A proprietary parallel IO code base relinquishes such flexibilities. On the other hand, a generic UFS-based MPI-IO implementation is typically used on many Linux-based platforms. We have developed an open-source MPI-IO package over Lustre, referred to as OPAL (OPportunistic and Adaptive MPI-IO Library over Lustre). OPAL provides a single source-code base for MPI-IO over Lustre on Cray XT and Linux platforms. Compared to Cray implementation, OPAL provides a number of good features, including arbitrary specification of striping patterns and Lustre-stripe aligned file domain partitioning. This paper presents the performance comparisons between OPAL and Cray's proprietary implementation. Our evaluation demonstrates that OPAL achieves the performance comparable to the Cray implementation. We also exemplify the benefits of an open source package in revealing the underpinning of the parallel IO performance.

  18. VisIO: enabling interactive visualization of ultra-scale, time-series data via high-bandwidth distributed I/O systems

    SciTech Connect (OSTI)

    Mitchell, Christopher J [Los Alamos National Laboratory; Ahrens, James P [Los Alamos National Laboratory; Wang, Jun [UCF

    2010-10-15T23:59:59.000Z

    Petascale simulations compute at resolutions ranging into billions of cells and write terabytes of data for visualization and analysis. Interactive visuaUzation of this time series is a desired step before starting a new run. The I/O subsystem and associated network often are a significant impediment to interactive visualization of time-varying data; as they are not configured or provisioned to provide necessary I/O read rates. In this paper, we propose a new I/O library for visualization applications: VisIO. Visualization applications commonly use N-to-N reads within their parallel enabled readers which provides an incentive for a shared-nothing approach to I/O, similar to other data-intensive approaches such as Hadoop. However, unlike other data-intensive applications, visualization requires: (1) interactive performance for large data volumes, (2) compatibility with MPI and POSIX file system semantics for compatibility with existing infrastructure, and (3) use of existing file formats and their stipulated data partitioning rules. VisIO, provides a mechanism for using a non-POSIX distributed file system to provide linear scaling of 110 bandwidth. In addition, we introduce a novel scheduling algorithm that helps to co-locate visualization processes on nodes with the requested data. Testing using VisIO integrated into Para View was conducted using the Hadoop Distributed File System (HDFS) on TACC's Longhorn cluster. A representative dataset, VPIC, across 128 nodes showed a 64.4% read performance improvement compared to the provided Lustre installation. Also tested, was a dataset representing a global ocean salinity simulation that showed a 51.4% improvement in read performance over Lustre when using our VisIO system. VisIO, provides powerful high-performance I/O services to visualization applications, allowing for interactive performance with ultra-scale, time-series data.

  19. Scalable I/O Systems via Node-Local Storage: Approaching 1 TB/sec File I/O

    SciTech Connect (OSTI)

    Moody, A; Bronevetsky, G

    2008-05-20T23:59:59.000Z

    The growth in the computational capability of modern supercomputing systems has been accompanied by corresponding increases in CPU count, total RAM, and total storage capacity. Indeed, systems such as Blue-Gene/L [3], BlueGene/P, Ranger, and the Cray XT series have grown to more than 100k processors, with 100 TeraBytes of RAM and are attached to multi-PetaByte storage systems. However, as part of this design evolution, large supercomputers have lost node-local storage elements, such as disks. While this decision was motivated by important considerations like overall system reliability, it also resulted in these systems losing a key level in their memory hierarchy, with nothing to fill the gap between local RAM and the parallel file system. While today's large supercomputers are typically attached to fast parallel file systems, which provide tens of GBs/s of I/O bandwidth, the computational capacity has grown much faster than the storage bandwidth capacity. As such, these machines are now provided with much less than 1GB/s of I/O bandwidth per TeraFlop of compute power, which is below the generally accepted limit required for a well-balanced system [8] [16]. The result is that today's limited I/O bandwidth is choking the capabilities of modern supercomputers, specifically in terms of limiting their working sets and making fault tolerance techniques, such as checkpointing, prohibitively expensive. This paper presents an alternative system design oriented on using node-local storage to improve aggregate system I/O bandwidth. We focus on the checkpointing use-case and present an experimental evaluation of SCR, a new checkpointing library that makes use of node-local storage to significantly improve the performance of checkpointing on large-scale supercomputers. Experiments show that SCR achieves unprecedented write speeds, reaching 700GB/s on 8,752 processors. Our results scale such that we expect a similarly structured system consisting of 12,500 processors to achieve aggregate I/O bandwidth of 1 TB/s.

  20. vTurbo: Accelerating Virtual Machine I/O Processing Using Designated Turbo-Sliced Core

    E-Print Network [OSTI]

    Cong Xu; Sahan Gamage; Hui Lu; Ramana Kompella; Dongyan Xu

    In a virtual machine (VM) consolidation environment, it has been observed that CPU sharing among multiple VMs will lead to I/O processing latency because of the CPU access latency experienced by each VM. In this paper, we present vTurbo, a system that accelerates I/O processing for VMs by offloading I/O processing to a designated core. More specifically, the designated core called turbo core runs with a much smaller time slice (e.g., 0.1ms) than the cores shared by production VMs. Most of the I/O IRQs for the production VMs will be delegated to the turbo core for more timely processing, hence accelerating the I/O processing for the production VMs. Our experiments show that vTurbo significantly improves the VMs network and disk I/O throughput, which consequently translates into application-level performance improvement. 1

  1. ESnet Powers NRL's 100 Gbps Remote I/O Demo at SC14

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

    Powers NRL's 100 Gbps Remote IO Demo at SC14 News & Publications ESnet News Media & Press Publications and Presentations Galleries ESnet Awards and Honors Contact Us Media Jon...

  2. Models for Multiband IR Surveys

    E-Print Network [OSTI]

    Cong Xu; Carol J. Lonsdale; David L. Shupe; JoAnn O'Linger; Frank Masci

    2001-07-08T23:59:59.000Z

    Empirical 'backward' galaxy evolution models for IR-bright galaxies are constrained using multiband IR surveys. A new Monte-Carlo algorithm is developed for this task. It exploits a large library of realistic Spectral Energy Distributions (SEDs) of 837 local IR galaxies (IRAS 25$\\mu m$ selected) from the UV (1000{\\AA}) to the radio (20cm), including ISO-measured 3--13$\\mu m$ unidentified broad features (UIBs). The basic assumption is that the local correlation between SEDs and Mid-Infrared (MIR) luminosities can be applied to earlier epochs of the Universe. Three populations of IR sources are considered in the evolution models. These include (1) starburst galaxies, (2) normal late-type galaxies, and (3) galaxies with AGN. A set of models so constructed are compared with data from the literature. Predictions for number counts, confusion limits, redshift distributions, and color-color diagrams are made for multiband surveys using the upcoming SIRTF satellite.

  3. Umwelt Management AG UMaAG | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty Edit withTianlin BaxinUmwelt Management AG UMaAG Jump to: navigation, search Name:

  4. Ristma AG | Open Energy Information

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    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty Edit with form HistoryRistma AG Jump to: navigation, search Name: Ristma AG Place:

  5. Gorlitz AG | Open Energy Information

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    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are8COaBulkTransmissionSitingProcess.pdfGetec AG Contracting Jump to:Echo,GEFLakes,GoliadGordon, Alabama:Gorlitz AG

  6. Sunways AG | Open Energy Information

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    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty Edit with formSoutheastern ILSunseeker Energy Holding AG JumpSunways AG Jump to:

  7. Scalable I/O Systems via Node-Local Storage: Approaching 1 TB/sec File I/O

    SciTech Connect (OSTI)

    Bronevetsky, G; Moody, A

    2009-08-18T23:59:59.000Z

    In the race to PetaFLOP-speed supercomputing systems, the increase in computational capability has been accompanied by corresponding increases in CPU count, total RAM, and storage capacity. However, a proportional increase in storage bandwidth has lagged behind. In order to improve system reliability and to reduce maintenance effort for modern large-scale systems, system designers have opted to remove node-local storage from the compute nodes. Today's multi-TeraFLOP supercomputers are typically attached to parallel file systems that provide only tens of GBs/s of I/O bandwidth. As a result, such machines have access to much less than 1GB/s of I/O bandwidth per TeraFLOP of compute power, which is below the generally accepted limit required for a well-balanced system. In a many ways, the current I/O bottleneck limits the capabilities of modern supercomputers, specifically in terms of limiting their working sets and restricting fault tolerance techniques, which become critical on systems consisting of tens of thousands of components. This paper resolves the dilemma between high performance and high reliability by presenting an alternative system design which makes use of node-local storage to improve aggregate system I/O bandwidth. In this work, we focus on the checkpointing use-case and present an experimental evaluation of the Scalable Checkpoint/Restart (SCR) library, a new adaptive checkpointing library that uses node-local storage to significantly improve the checkpointing performance of large-scale supercomputers. Experiments show that SCR achieves unprecedented write speeds, reaching a measured 700GB/s of aggregate bandwidth on 8,752 processors and an estimated 1TB/s for a similarly structured machine of 12,500 processors. This corresponds to a speedup of over 70x compared to the bandwidth provided by the 10GB/s parallel file system the cluster uses. Further, SCR can adapt to an environment in which there is wide variation in performance or capacity among the individual node-local storage elements.

  8. I/O subnets for the APS control system

    SciTech Connect (OSTI)

    Arnold, N.D.; Nawrocki, G.J.; Daly, R.T.; Kraimer, M.R.; McDowell, W.P.

    1991-01-01T23:59:59.000Z

    Although the Advanced Photon Source Control System allows for microprocessor -- based Input/Output Controllers (IOCs) to be distributed throughout the facility, it is not always cost effective to provide such capability at every location where an interface to the Control System is required. I/O subnets implemented via message passing network protocols are used to interface points and/or equipment to a somewhat distant IOC, thereby reducing the number of required IOC's and minimizing the field wiring from the equipment to the Control System. For greatest flexibility, the subnets must support connections to equipment that requires several discrete I/O points, connections to GPIB and RS232 instruments, and a network connection to custom designed intelligent equipment. This paper describes an approach that supports all of the interfaces with one subnet implementation, BITBUS. In addition to accommodating several different interfaces on a single subnet, this approach also circumvents several limitations of GPIB and RS232 which would otherwise restrict their use in a harsh, industrial environment. 1 ref., 1 fig.

  9. Siemens AG 2009. All rights reserved. Investitionsmanagement

    E-Print Network [OSTI]

    Manstein, Dietmar J.

    Siemens AG 2009. All rights reserved. Investitionsmanagement Wie steuert man erfolgreich Investitionen? - Tools eines erfolgreichen, globalen Industrieunternehmens - Michael Sigmund CFO Siemens Investitionsplanung Berlin, 26. November, 2009 #12;Page 2 November 26, 2009 Copyright Siemens AG 2009. All rights

  10. Siemens AG 2009 Energy Sector

    E-Print Network [OSTI]

    Ulm, Universitt

    der Energieversorgung Intelligente Netze Smart Grid Karl-Josef Kuhn Siemens AG, Corporate Technology pressure on infrastructures Cities are responsible for around 75% of the world's energy consumption Cities directly or indirectly account for 60% of the world's water use An overloaded power grid caused a 3-day

  11. Design Techniques for Energy Efficient Multi-GB/S Serial I/O Transceivers

    E-Print Network [OSTI]

    Song, Younghoon

    2014-01-02T23:59:59.000Z

    Total I/O bandwidth demand is growing in high-performance systems due to the emergence of many-core microprocessors and in mobile devices to support the next generation of multi-media features. High-speed serial I/O energy ...

  12. DEPLETED MAGNETIC FLUX TUBES AS PROBES OF THE IO TORUS PLASMA

    E-Print Network [OSTI]

    Russell, Christopher T.

    and Astronomy, University of Iowa, Iowa City, IA 52242, USA ABSTRACT On the initial pass by Io the Galileo that they were depleted in their energy content. These tubes have not been seen on every return to the Io torus balance with neighboring flux tubes in steady state. Figure 1 shows such pressure balance. The magnitude

  13. An iOS Reader for People with Dyslexia NLP & Web Research Groups

    E-Print Network [OSTI]

    An iOS Reader for People with Dyslexia Luz Rello NLP & Web Research Groups Ricardo Baeza cally designed for people with dyslexia according to previous research with this target group, Human Factors Keywords Reading software, dyslexia, readability, Spanish iOS. 1. INTRODUCTION Around 10

  14. Design Techniques for Energy Efficient Multi-GB/S Serial I/O Transceivers

    E-Print Network [OSTI]

    Song, Younghoon

    2014-01-02T23:59:59.000Z

    Total I/O bandwidth demand is growing in high-performance systems due to the emergence of many-core microprocessors and in mobile devices to support the next generation of multi-media features. High-speed serial I/O energy efficiency must improve...

  15. An Optimizing Compiler for Petascale I/O on Leadership-Class Architectures

    SciTech Connect (OSTI)

    Kandemir, Mahmut Taylan [PSU; Choudary, Alok [Northwestern; Thakur, Rajeev [ANL

    2014-03-01T23:59:59.000Z

    In high-performance computing (HPC), parallel I/O architectures usually have very complex hierarchies with multiple layers that collectively constitute an I/O stack, including high-level I/O libraries such as PnetCDF and HDF5, I/O middleware such as MPI-IO, and parallel file systems such as PVFS and Lustre. Our DOE project explored automated instrumentation and compiler support for I/O intensive applications. Our project made significant progress towards understanding the complex I/O hierarchies of high-performance storage systems (including storage caches, HDDs, and SSDs), and designing and implementing state-of-the-art compiler/runtime system technology that targets I/O intensive HPC applications that target leadership class machine. This final report summarizes the major achievements of the project and also points out promising future directions Two new sections in this report compared to the previous report are IOGenie and SSD/NVM-specific optimizations.

  16. SCORPIO: A Scalable Two-Phase Parallel I/O Library With Application To A Large Scale Subsurface Simulator

    SciTech Connect (OSTI)

    Sreepathi, Sarat [ORNL] [ORNL; Sripathi, Vamsi [Intel Corporation] [Intel Corporation; Mills, Richard T [ORNL] [ORNL; Hammond, Glenn [Pacific Northwest National Laboratory (PNNL)] [Pacific Northwest National Laboratory (PNNL); Mahinthakumar, Kumar [North Carolina State University] [North Carolina State University

    2013-01-01T23:59:59.000Z

    Inefficient parallel I/O is known to be a major bottleneck among scientific applications employed on supercomputers as the number of processor cores grows into the thousands. Our prior experience indicated that parallel I/O libraries such as HDF5 that rely on MPI-IO do not scale well beyond 10K processor cores, especially on parallel file systems (like Lustre) with single point of resource contention. Our previous optimization efforts for a massively parallel multi-phase and multi-component subsurface simulator (PFLOTRAN) led to a two-phase I/O approach at the application level where a set of designated processes participate in the I/O process by splitting the I/O operation into a communication phase and a disk I/O phase. The designated I/O processes are created by splitting the MPI global communicator into multiple sub-communicators. The root process in each sub-communicator is responsible for performing the I/O operations for the entire group and then distributing the data to rest of the group. This approach resulted in over 25X speedup in HDF I/O read performance and 3X speedup in write performance for PFLOTRAN at over 100K processor cores on the ORNL Jaguar supercomputer. This research describes the design and development of a general purpose parallel I/O library, SCORPIO (SCalable block-ORiented Parallel I/O) that incorporates our optimized two-phase I/O approach. The library provides a simplified higher level abstraction to the user, sitting atop existing parallel I/O libraries (such as HDF5) and implements optimized I/O access patterns that can scale on larger number of processors. Performance results with standard benchmark problems and PFLOTRAN indicate that our library is able to maintain the same speedups as before with the added flexibility of being applicable to a wider range of I/O intensive applications.

  17. Reducing Concurrency Bottlenecks in Parallel I/O Workloads

    SciTech Connect (OSTI)

    Manzanares, Adam C. [Los Alamos National Laboratory; Bent, John M. [Los Alamos National Laboratory; Wingate, Meghan [Los Alamos National Laboratory

    2011-01-01T23:59:59.000Z

    To enable high performance parallel checkpointing we introduced the Parallel Log Structured File System (PLFS). PLFS is middleware interposed on the file system stack to transform concurrent writing of one application file into many non-concurrently written component files. The promising effectiveness of PLFS makes it important to examine its performance for workloads other than checkpoint capture, notably the different ways that state snapshots may be later read, to make the case for using PLFS in the Exascale I/O stack. Reading a PLFS file involved reading each of its component files. In this paper we identify performance limitations on broader workloads in an early version of PLFS, specifically the need to build and distribute an index for the overall file, and the pressure on the underlying parallel file system's metadata server, and show how PLFS's decomposed components architecture can be exploited to alleviate bottlenecks in the underlying parallel file system.

  18. Theoretical studies of Ir5Th and Ir5Ce nanoscale precipitates in Ir

    SciTech Connect (OSTI)

    Morris, James R [ORNL] [ORNL; Averill, Frank [ORNL] [ORNL; Cooper, Valentino R [ORNL] [ORNL

    2014-01-01T23:59:59.000Z

    Experimentally, it is known that very small amounts of thorium and/or cerium added to iridium metal form a precipitate, Ir5Th / Ir5Ce, which improves the high temperature mechanical properties of the resulting alloys. We demonstrate that there are low-energy configurations for nano-scale precipitates of these phases in Ir, and that these coherent arrangements may assist in producing improved mechanical properties. One precipitate/matrix orientation gives a particularly low interfacial energy, and a low lattice misfit. Nanolayer precipitates with this orientation are found to be likely to form, with little driving force to coarsen. The predicted morphology of the precipitates and their orientation with the matrix phase provide a potential experiment that could be used to test these predictions.

  19. DB-Netz AG Offices

    High Performance Buildings Database

    Hamm, Germany The new office building for DB Netz AG was designed by the collaborative team of Architrav Architects and the Buildings Physics and Technical Building Services group of the University of Karlsruhe. The team developed an energy efficient building concept for the 64,304 sqft office building, located in Hamm, Germany. The design concept of the building is dominated by architectural solutions for ventilation, cooling and lighting. Use of HVAC and electric lighting is minimized as much as possible.

  20. Automatic Identification of Application I/O Signatures from Noisy Server-Side Traces

    SciTech Connect (OSTI)

    Liu, Yang [ORNL] [ORNL; Gunasekaran, Raghul [ORNL] [ORNL; Ma, Xiaosong [ORNL] [ORNL; Vazhkudai, Sudharshan S [ORNL] [ORNL

    2014-01-01T23:59:59.000Z

    Competing workloads on a shared storage system cause I/O resource contention and application performance vagaries. This problem is already evident in today s HPC storage systems and is likely to become acute at exascale. We need more interaction between application I/O requirements and system software tools to help alleviate the I/O bottleneck, moving towards I/O-aware job scheduling. However, this requires rich techniques to capture application I/O characteristics, which remain evasive in production systems. Traditionally, I/O characteristics have been obtained using client-side tracing tools, with drawbacks such as non-trivial instrumentation/development costs, large trace traffic, and inconsistent adoption. We present a novel approach, I/O Signature Identifier (IOSI), to characterize the I/O behavior of data-intensive applications. IOSI extracts signatures from noisy, zero-overhead server-side I/O throughput logs that are already collected on today s supercomputers, without interfering with the compiling/execution of applications. We evaluated IOSI using the Spider storage system at Oak Ridge National Laboratory, the S3D turbulence application (running on 18,000 Titan nodes), and benchmark-based pseudo-applications. Through our ex- periments we confirmed that IOSI effectively extracts an application s I/O signature despite significant server-side noise. Compared to client-side tracing tools, IOSI is transparent, interface-agnostic, and incurs no overhead. Compared to alternative data alignment techniques (e.g., dynamic time warping), it offers higher signature accuracy and shorter processing time.

  1. Reliable low latency I/O in torus-based interconnection networks

    E-Print Network [OSTI]

    Azeez, Babatunde

    2007-04-25T23:59:59.000Z

    In today's high performance computing environment I/O remains the main bottleneck in achieving the optimal performance expected of the ever improving processor and memory technologies. Interconnection networks therefore combines processing units...

  2. ATLAS I/O Performance Optimization in As-Deployed Environments

    E-Print Network [OSTI]

    Maier, Thomas; The ATLAS collaboration; Bhimji, Wahid; Elmsheuser, Johannes; van Gemmeren, Peter; Malon, David; Krumnack, Nils

    2015-01-01T23:59:59.000Z

    I/O is a fundamental determinant in the overall performance of physics analysis and other data-intensive scientific computing. It is, further, crucial to effective resource delivery by the facilities and infrastructure that support data-intensive science. To understand I/O performance, clean measurements in controlled environments are essential, but effective optimization requires as well an understanding of the complicated realities of as-deployed environments. These include a spectrum of local and wide-area data delivery and resilience models, heterogeneous storage systems, matches and mismatches between data organization and access patterns, multi-user considerations that may help or hinder individual job performance, and more. The ATLAS experiment has organized an interdisciplinary working group of I/O, persistence, analysis framework, distributed infrastructure, site deployment, and external experts to understand and improve I/O performance in preparation for Run 2 of the Large Hadron Collider. The adopt...

  3. Using Probabilistic I/O Automata to Analyze an Oblivious Transfer Protocol

    E-Print Network [OSTI]

    Canetti, Ran

    2006-06-19T23:59:59.000Z

    We demonstrate how to carry out cryptographic security analysis ofdistributed protocols within the Probabilistic I/O Automataframework of Lynch, Segala, and Vaandrager. This framework providestools for arguing rigorously ...

  4. Using Task-Structured Probabilistic I/O Automata to Analyze an Oblivious Transfer Protocol

    E-Print Network [OSTI]

    Canetti, Ran

    2007-02-16T23:59:59.000Z

    The Probabilistic I/O Automata framework of Lynch, Segala and Vaandrager provides tools for precisely specifying protocols and reasoning about their correctness using multiple levels of abstraction, based on implementation ...

  5. Using Task-Structured Probabilistic I/O Automata to Analyze an Oblivious Transfer Protocol

    E-Print Network [OSTI]

    Canetti, Ran

    2006-06-20T23:59:59.000Z

    The Probabilistic I/O Automata framework of Lynch, Segala and Vaandrager provides tools for precisely specifying protocols and reasoning about theircorrectness using multiple levels of abstraction, based on implementation ...

  6. High-Performance I/O: HDF5 for Lattice QCD

    SciTech Connect (OSTI)

    Kurth, Thorsten; Pochinsky, Andrew; Sarje, Abhinav; Syritsyn, Sergey; Walker-Loud, Andre

    2015-01-01T23:59:59.000Z

    Practitioners of lattice QCD/QFT have been some of the primary pioneer users of the state-of-the-art high-performance-computing systems, and contribute towards the stress tests of such new machines as soon as they become available. As with all aspects of high-performance-computing, I/O is becoming an increasingly specialized component of these systems. In order to take advantage of the latest available high-performance I/O infrastructure, to ensure reliability and backwards compatibility of data files, and to help unify the data structures used in lattice codes, we have incorporated parallel HDF5 I/O into the SciDAC supported USQCD software stack. Here we present the design and implementation of this I/O framework. Our HDF5 implementation outperforms optimized QIO at the 10-20% level and leaves room for further improvement by utilizing appropriate dataset chunking.

  7. Reliable low latency I/O in torus-based interconnection networks

    E-Print Network [OSTI]

    Azeez, Babatunde

    2007-04-25T23:59:59.000Z

    In today's high performance computing environment I/O remains the main bottleneck in achieving the optimal performance expected of the ever improving processor and memory technologies. Interconnection networks therefore combines processing units...

  8. Your FAFSA and the IRS Data Retrieval Tool What is the IRS Data Retrieval Tool?

    E-Print Network [OSTI]

    Moore, Paul A.

    Your FAFSA and the IRS Data Retrieval Tool What is the IRS Data Retrieval Tool? The U.S. Department of Education and the Internal Revenue Service (IRS) have collaborated to develop a tool that simplifies the completion of the FAFSA application. The IRS Data Retrieval tool allows FAFSA applicants and parents

  9. Flow Phenomena at AGS Energies

    E-Print Network [OSTI]

    J. P. Wessels

    1997-04-07T23:59:59.000Z

    In this talk some of the latest data on directed sideward, elliptic, radial, and longitudinal flow at AGS energies will be reviewed. A method to identify the reaction plane event by event and the measurement of its resolution will be discussed. The distributions of global observables (transverse energy E_T and charged particle multiplicity N_c), as well as those of identified particles will be shown. Finally, the data will be put in context with measurements at other beam energies. These systematics will then be discussed in terms of possible signatures of the QCD phase transition.

  10. Sinosol AG | Open Energy Information

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    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro Industries Pvt LtdShawangunk, New York:SiG Solar GmbHKentucky:Sinosol AG Jump to: navigation,

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  18. Cowatec AG | Open Energy Information

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  1. Fuhrlander AG | Open Energy Information

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  3. Petrotec AG | Open Energy Information

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  4. Solarcomplex AG | Open Energy Information

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    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro Industries Pvt LtdShawangunk, NewSingapore Jump to:VoltaicSolarProSolarWorks NJSolarcomplex AG

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  8. Solarstocc AG | Open Energy Information

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    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty Edit with form HistoryRistmaSinosteelSolar EnergySolaria FairwaySolarsquare AG

  9. Solarwatt AG | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty Edit with form HistoryRistmaSinosteelSolar EnergySolariaSolarwatt AG Jump to:

  10. Solea AG | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty Edit with form HistoryRistmaSinosteelSolar EnergySolariaSolarwatt AG

  11. Altus AG | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTriWildcat Place: Wayne,EnergyInfrastructureAltira Group LLCAltus AG Jump

  12. Tse AG | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty Edit withTianlin Baxin HydropowerTrinity Thermal Systems JumpTrue Electric LLCTse AG

  13. Welivit AG | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty Edit withTianlin BaxinUmweltVillageGraph HomeWaranaWaterEnergyWeeklyWelivit AG Jump

  14. REON AG | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere I GeothermalPotentialBiopowerSolidGenerationMethodInformationeNevada <REC Solar (Colorado)srlREON AG

  15. Ag

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

    (c) The term ''atomic energy'' means all forms of energy released in the course of nuclear fission or nuclear transformation. (d) The term ''atomic weapon'' means any device...

  16. Carbon nanotube IR detectors (SV)

    SciTech Connect (OSTI)

    Leonard, F. L.

    2012-03-01T23:59:59.000Z

    Sandia National Laboratories (Sandia) and Lockheed Martin Corporation (LMC) collaborated to (1) evaluate the potential of carbon nanotubes as channels in infrared (IR) photodetectors; (2) assemble and characterize carbon nanotube electronic devices and measure the photocurrent generated when exposed to infrared light;(3) compare the performance of the carbon nanotube devices with that of traditional devices; and (4) develop and numerically implement models of electronic transport and opto-electronic behavior of carbon nanotube infrared detectors. This work established a new paradigm for photodetectors.

  17. Molecular Dynamics Simulation of the AgCl/Electrolyte Interfacial...

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

    Simulation of the AgClElectrolyte Interfacial Capacity. Molecular Dynamics Simulation of the AgClElectrolyte Interfacial Capacity. Abstract: Molecular dynamics simulation of the...

  18. Layout-Aware I/O Scheduling for Terabits Data Movement

    SciTech Connect (OSTI)

    Kim, Youngjae [ORNL] [ORNL; Atchley, Scott [ORNL] [ORNL; Vallee, Geoffroy R [ORNL] [ORNL; Shipman, Galen M [ORNL] [ORNL

    2013-01-01T23:59:59.000Z

    Many science facilities, such as the Department of Energy s Leadership Computing Facilities and experimental facilities including the Spallation Neutron Source, Stanford Linear Accelerator Center, and Advanced Photon Source, produce massive amounts of experimental and simulation data. These data are often shared among the facilities and with collaborating institutions. Moving large datasets over the wide- area network (WAN) is a major problem inhibiting collaboration. Next- generation, terabit-networks will help alleviate the problem, however, the parallel storage systems on the end-system hosts at these institutions can become a bottleneck for terabit data movement. The parallel storage system (PFS) is shared by simulation systems, experimental systems, analysis and visualization clusters, in addition to wide-area data movers. These competing uses often induce temporary, but significant, I/O load imbalances on the storage system, which impact the performance of all the users. The problem is a serious concern because some resources are more expensive (e.g. super computers) or have time-critical deadlines (e.g. experimental data from a light source), but parallel file systems handle all requests fairly even if some storage servers are under heavy load. This paper investigates the problem of competing workloads accessing the parallel file system and how the performance of wide-area data movement can be improved in these environments. First, we study the I/O load imbalance problems using actual I/O performance data collected from the Spider storage system at the Oak Ridge Leadership Computing Facility. Second, we present I/O optimization solutions with layout-awareness on end-system hosts for bulk data movement. With our evaluation, we show that our I/O optimization techniques can avoid the I/O congested disk groups, improving storage I/O times on parallel storage systems for terabit data movement.

  19. Understanding I/O workload characteristics of a Peta-scale storage system

    SciTech Connect (OSTI)

    Kim, Youngjae [ORNL; Gunasekaran, Raghul [ORNL

    2015-01-01T23:59:59.000Z

    Understanding workload characteristics is critical for optimizing and improving the performance of current systems and software, and architecting new storage systems based on observed workload patterns. In this paper, we characterize the I/O workloads of scientific applications of one of the world s fastest high performance computing (HPC) storage cluster, Spider, at the Oak Ridge Leadership Computing Facility (OLCF). OLCF flagship petascale simulation platform, Titan, and other large HPC clusters, in total over 250 thousands compute cores, depend on Spider for their I/O needs. We characterize the system utilization, the demands of reads and writes, idle time, storage space utilization, and the distribution of read requests to write requests for the Peta-scale Storage Systems. From this study, we develop synthesized workloads, and we show that the read and write I/O bandwidth usage as well as the inter-arrival time of requests can be modeled as a Pareto distribution. We also study the I/O load imbalance problems using I/O performance data collected from the Spider storage system.

  20. Facile synthesis of novel Ag/AgI/BiOI composites with highly enhanced visible light photocatalytic performances

    SciTech Connect (OSTI)

    Cao, Jing, E-mail: caojing@mail.ipc.ac.cn [College of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, Anhui (China); State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100 (China); Zhao, Yijie; Lin, Haili; Xu, Benyan [College of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, Anhui (China); Chen, Shifu, E-mail: chshifu@chnu.edu.cn [College of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, Anhui (China)

    2013-10-15T23:59:59.000Z

    Novel Ag/AgI/BiOI composites were controllably synthesized via a facile ion-exchange followed by photoreduction strategy by using hierarchical BiOI microflower as substrate. The as-prepared Ag/AgI/BiOI composites were studied by X-ray powder diffractometer (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), BrunauerEmmettTeller (BET) surface area analyzer and UVvis diffuse reflectance spectroscopy (DRS). Under visible light (?>420 nm), Ag/AgI/BiOI displayed highly enhanced photocatalytic activities for degradation of methyl orange (MO) compared to the pure hierarchical BiOI, which was mainly ascribed to the highly efficient separation of electrons and holes through the closely contacted interfaces in the Ag/AgI/BiOI ternary system. - Graphical abstract: Ag/AgI/BiOI displayed excellent photocatalytic activities for methyl orange degradation under visible light, which was mainly ascribed to the highly efficient separation of electrons and holes through Z-scheme pathway. Display Omitted - Highlights: Novel Ag/AgI/BiOI composites were successfully synthesized. Ag/AgI/BiOI displayed higher visible light activities than those of pure BiOI and AgI. O{sub 2}{sup ?} and h{sup +}, especially O{sub 2}{sup ?}, dominated the photodegradation process of MO. A Z-scheme pattern was adopted for Ag/AgI/BiOI activity enhancement.

  1. Ag Education Student 1234 Education Drive

    E-Print Network [OSTI]

    Ag Education Student 1234 Education Drive Fort Collins, CO 80523 educationstudent@gmail.com~970-222-1234 Education Bachelors of Science in Agriculture Education (Teacher Licensure requirements met) Anticipated May

  2. High intensity performance of the Brookhaven AGS

    SciTech Connect (OSTI)

    Brennan, J.M.; Roser, T.

    1996-07-01T23:59:59.000Z

    Experience and results from recent high intensity proton running periods of the Brookhaven AGS, during which a record intensity for a proton synchrotron of 6.3 x 10{sup 13} protons/pulse was reached, is presented. This high beam intensity allowed for the simultaneous operation of three high precision rare kaon decay experiments. The record beam intensities were achieved after the 1.5 GeV Booster was commissioned and a transition jump system, a powerful transverse damper, and an rf upgrade in the AGS were completed. Recently even higher intensity proton synchrotrons are studied for neutron spallation sources or proton driver for a muon collider. Implications of the experiences from the AGS to these proposals and also possible future upgrades for the AGS are discussed.

  3. AGS fixed target program with nuclear beams

    SciTech Connect (OSTI)

    Foley, K.J.

    1984-01-01T23:59:59.000Z

    The recent approval of the beam transfer line from the Tandem Van de Graaf to the AGS signals the advent of a new era of Nuclear and Particle Physics at BNL. High Energy nuclear beams are expected to be available for experiments in 1986. I will discuss the direct link between the Tandems and the AGS. Two other proposed projects, the Relativistic Heavy Ion Collider and the Synchrotron Booster, are discussed in another presentation to this conference.

  4. H5hut: A High-Performance I/O Library for Particle-based Simulations

    SciTech Connect (OSTI)

    Howison, Mark; Adelmann, Andreas; Bethel, E. Wes; Gsell, Achim; Oswald, Benedikt; Prabhat,

    2010-09-24T23:59:59.000Z

    Particle-based simulations running on large high-performance computing systems over many time steps can generate an enormous amount of particle- and field-based data for post-processing and analysis. Achieving high-performance I/O for this data, effectively managing it on disk, and interfacing it with analysis and visualization tools can be challenging, especially for domain scientists who do not have I/O and data management expertise. We present the H5hut library, an implementation of several data models for particle-based simulations that encapsulates the complexity of HDF5 and is simple to use, yet does not compromise performance.

  5. Infrared transmissive, hollow plastic waveguides with inner AgAgI coatings

    E-Print Network [OSTI]

    A. Harrington Hollow polycarbonate waveguides with thin-film coatings of AgAgI were fabricated and at the same time maintain good flexibility we have chosen to use polycarbonate tubing with bore sizes ranging from 500 to 2000 m. Polycarbonate tubing is quite flexible in the bore sizes up to 6000 m

  6. Function Test Framework for Testing IO-Blocks in a Model-Based Rapid Prototyping Development

    E-Print Network [OSTI]

    Function Test Framework for Testing IO-Blocks in a Model-Based Rapid Prototyping Development -- Testing and verification are important methods for gaining confidence in the reliability of a software changing development cycles or that is tar- geted at many platforms. In this paper we present a test

  7. Synthesizing Representative I/O Workloads Using Iterative Distillation Zachary Kurmas

    E-Print Network [OSTI]

    Kurmas, Zachary

    Synthesizing Representative I/O Workloads Using Iterative Distillation Zachary Kurmas College proper- ties are "key" for a given workload and storage system. We have developed a tool, the Distiller, that automati- cally identifies the key properties ("attribute-values") of the workload. The Distiller then uses

  8. A Novel System Architecture for Web Scale Applications Using Lightweight CPUs and Virtualized I/O

    E-Print Network [OSTI]

    Balasubramonian, Rajeev

    servers, to achieve scalable and low-cost processing. The Map-Reduce frame- work and its open-system where multiple servers share I/O resources. An ASIC based high-bandwidth interconnect fabric, and FPGA envelope. To overcome software inefficiency and increase the utilization of virtualized disk bandwidth

  9. An Energy-Oriented Evaluation of Buffer Cache Algorithms Using Parallel I/O Workloads

    E-Print Network [OSTI]

    Zhu, Yifeng

    utilize these energy-aware devices. As we explore different management schemes under five real-world--Memory energy consumption, cache replacement algorithms, parallel I/O, cluster storage. ? 1 INTRODUCTION of power consumption. The energy breakdown measured on a real server shows that the memory energy

  10. Gathering at the Well: Creating Communities for Grid I/O #

    E-Print Network [OSTI]

    Arpaci-Dusseau, Remzi

    to data repositories is neither scalable nor efficient for large numbers of jobs. I/O systems that solve. Schedulers must bring jobs and data in close proximity in order to satisfy through put, scalability, and policy requirements. Most systems accom plish this by making either jobs or data mobile. We propose

  11. Gathering at the Well: Creating Communities for Grid I/O

    E-Print Network [OSTI]

    Wisconsin at Madison, University of

    to data repositories is neither scalable nor efficient for large numbers of jobs. I/O systems that solve. Schedulers must bring jobs and data in close proximity in order to satisfy through- put, scalability, and policy requirements. Most systems accom- plish this by making either jobs or data mobile. We propose

  12. Ag on Si(111) from basic science to application

    SciTech Connect (OSTI)

    Belianinov, Aleksey

    2012-04-04T23:59:59.000Z

    In our work we revisit Ag and Au adsorbates on Si(111)-7x7, as well as experiment with a ternary system of Pentacene, Ag and Si(111). Of particular interest to us is the Si(111)-({radical}3x{radical}3)R30{degree}Ag (Ag-Si-{radical}3 hereafter). In this thesis I systematically e plore effects of Ag deposition on the Ag-Si-{radical}3 at different temperatures, film thicknesses and deposition fluxes. The generated insight of the Ag system on the Si(111) is then applied to generate novel methods of nanostructuring and nanowire growth. I then extend our expertise to the Au system on the Ag-Si(111) to gain insight into Au-Si eutectic silicide formation. Finally we explore behavior and growth modes of an organic molecule on the Ag-Si interface.

  13. Spin coating of Ag nanoparticles: Effect of reduction

    SciTech Connect (OSTI)

    Ansari, A. A., E-mail: sdsartale@physics.unipune.ac.in; Sartale, S. D., E-mail: sdsartale@physics.unipune.ac.in [Thin Films and Nanomaterials Laboratory, Department of Physics, University of Pune, Pune - 411007 (India)

    2014-04-24T23:59:59.000Z

    A surfactant free method for the growth of Ag nanoparticles on glass substrate by spin coating of Ag ions solution followed by chemical reduction in aqueous hydrazine hydrate (HyH) solution has been presented. Appearance of surface plasmon resonance confirms the formation of Ag nanoparticles. Morphology and absorbance spectra of Ag nanoparticles films are used to examine effect of hydrazine concentration on the growth of Ag nanoparticles. SEM images show uniformly distributed Ag nanoparticles. Rate constant was found to be dependent on HyH concentration as a consequence influence particle size.

  14. AgPro | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTriWildcat 1AMEE JumpAeroWind Inc.Information AfluenteAg FuelsAgPro

  15. Getec AG Contracting | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are8COaBulkTransmissionSitingProcess.pdfGetec AG Contracting Jump to: navigation, search Name: Getec AG Contracting

  16. Umweltschutz UBP AG | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty Edit withTianlin BaxinUmwelt Management AG UMaAG Jump to: navigation,

  17. A novel polythreading Ag(I) coordination polymer with bluephotolumine...

    Office of Scientific and Technical Information (OSTI)

    polymer with blue photoluminescence Re-direct Destination: One new compound, Ag(p-bix)sub 3Ag(Hbtc)sub 22Hsub 2O (Hsub 3btc1,2,4-benzenetricarboxylate,...

  18. Ag@AgHPW as a plasmonic catalyst for visible-light photocatalytic degradation of environmentally harmful organic pollutants

    SciTech Connect (OSTI)

    Zhou, Wenhui; Cao, Minhua, E-mail: caomh@bit.edu.cn; Li, Na; Su, Shuangyue; Zhao, Xinyu; Wang, Jiangqiang; Li, Xianghua; Hu, Changwen

    2013-06-01T23:59:59.000Z

    Graphical abstract: Ag@Ag{sub x}H{sub 3?x}PW12O40 (Ag@AgHPW) nanoparticles (NPs), a new visible-light driven plasmonic photocatalyst, are prepared by a green photoreduction strategy without the addition of any surfactant, which show a high activity and stability for the degradation of methyl blue (MB) under visible light irradiation. - Highlights: A new visible-light driven photocatalyst Ag@Ag{sub x}H{sub 3?x}PW{sub 12}O{sub 40} was designed. The photocatalyst shows a high activity for the degradation of methyl blue. The high activity can be ascribed to the synergy of photoexcited AgHPW and Ag. - Abstract: Ag@Ag{sub x}H{sub 3?x}PW{sub 12}O{sub 40} (Ag@AgHPW) nanoparticles (NPs), a new visible-light driven plasmonic photocatalyst, are prepared by a green photoreduction strategy without the addition of any surfactant. They show strong absorption in the visible region because of the localized surface plasmon resonance (LSPR) of Ag NPs. This plasmonic photocatalyst shows a high activity and stability for the degradation of methyl blue (MB) under visible light irradiation, which could be attributed to the highly synergy of photoexcited Ag{sub x}H{sub 3?x}PW{sub 12}O{sub 40} (AgHPW) and plasmon-excited Ag NPs and the confinement effects at interfaces between polyoxometalates (POMs) and silver. POM anions have redox ability and high photocatalytic activity, whereas Ag NPs could effectively accelerate the separation of electrons and holes, both of which contribute to their high activity.

  19. The BNL AGS accelerator complex status and future plans

    SciTech Connect (OSTI)

    Tanaka, Mitsuyoshi [AGS Department, Brookhaven National Laboratory, Upton, New York 11973 (United States)

    1997-05-20T23:59:59.000Z

    This paper describes the present performance and capability of the BNL AGS accelerator complex and possible future intensity upgrade plans. In 1995, the AGS reached its design upgrade goal of 6.0{center_dot}10{sup 13} ppp with the Booster. The AGS with a new fast extracted beam (FEB) system is able to perform single bunch multiple extraction at 30 Hz per AGS cycle for the g-2 experiment and for RHIC injection.

  20. The BNL AGS accelerator complex status and future plans

    SciTech Connect (OSTI)

    Tanaka, M. [AGS Department, Brookhaven National Laboratory, Upton, New York11973 (United States)

    1997-05-01T23:59:59.000Z

    This paper describes the present performance and capability of the BNL AGS accelerator complex and possible future intensity upgrade plans. In 1995, the AGS reached its design upgrade goal of 6.0{center_dot}10{sup 13}ppp with the Booster. The AGS with a new fast extracted beam (FEB) system is able to perform single bunch multiple extraction at 30 Hz per AGS cycle for the g-2 experiment and for RHIC injection. {copyright} {ital 1997 American Institute of Physics.}

  1. The BNL AGS accelerator complex status and future plans

    SciTech Connect (OSTI)

    Tanaka, Mitsuyoshi

    1997-05-01T23:59:59.000Z

    This paper describes the present performance and capability of the BNL AGS accelerator complex and possible future intensity upgrade plans. In 1995, the AGS reached its design upgrade goal of 6.0 x 10(exp 13) ppp with the Booster. The AGS with a new fast extracted beam (FEB) system is able to perform single bunch multiple extraction at 30 Hz per AGS cycle for the g-2 experiment and for RHIC injection.

  2. IRS Data Retrieval Tool 2012-2013 FAFSA

    E-Print Network [OSTI]

    Russell, Lynn

    1 IRS Data Retrieval Tool 2012-2013 FAFSA Financial Aid Office University of California, San Diego #12;2 What is the IRS Data Retrieval Tool? · The IRS Retrieval Tool gives FAFSA applicants and parents the ability to transfer their data from the IRS to the FAFSA · The Retrieval Tool saves time and increases

  3. This page shows how to use the My Pitt Video (Panopto) iOS application on an iPad. To log into the My Pitt Video (Panopto) iOS App, tap "Sign In" in the top left corner.

    E-Print Network [OSTI]

    Benos, Panayiotis "Takis"

    iPad App iPad App This page shows how to use the My Pitt Video (Panopto) iOS application on an iPad. Login To log into the My Pitt Video (Panopto) iOS App, tap "Sign In" in the top left corner. In the Sign name and tap "Record a new video" to begin recording. Page 9 of 17 #12;iPad App Once you are finished

  4. Siemens AG, CT, September 2001 CORPORATETECHNOLOGY

    E-Print Network [OSTI]

    s Siemens AG, CT, September 2001 CORPORATETECHNOLOGY Research and Technology at Siemens Transportation Power Information & Communications Health Automation & Control #12;2 Siemens AGResearch and Technology at Siemens CORPORATETECHNOLOGY CT / E 020 a - 02.01 Key Figures for 2000 Amounts in billions

  5. Depolarizing 'beat' resonances in the Brookhaven AGS

    SciTech Connect (OSTI)

    Terwilliger, K.M.; Courant, E.D.; Krisch, A.D.; Ratner, L.D.

    1985-10-01T23:59:59.000Z

    While accelerating polarized protons in the Brookhaven AGS we found a variant of the standard imperfection and intrinsic depolarizing resonances which has some of the properties of both types. Imperfection resonances occur at G..gamma.. = k, when the number of spin precessions per revolution, G gamma, equals a harmonic of the depolarizing field, k. Intrinsic resonances occur at G..gamma.. = nP + or - ..nu.. /SUB Z/ , when the AGS gradient periodicities, nP, modulate free vertical betatron oscillations to create the sum and difference frequencies. The variant resonance is a beat between nP and an imperfection driven betatron oscillation of periodicity k'. These occur at G..gamma.. = nP + or - k', and are strongest when the driven betatron oscillation is largest. The effect was most dramatic at the strong G..gamma.. = 27 resonance. Since ..nu.. /SUB Z/ = 8.8 for the AGS, and there is a major nP = 36 AGS periodicity, a strong beat resonance should exist at G gamma = 36-9 = 27. Applying a 27 /SUP th/ harmonic correction directly was unsuccessful, but a 9 /SUP th/ harmonic correction removed the depolarization.

  6. Mathus Dejori, Siemens AG Structural learning of Bayesian networks

    E-Print Network [OSTI]

    Popeea, Corneliu - Chair for Foundations of Software Reliability and Theoretical Computer Science

    Mathus Dejori, Siemens AG Structural learning of Bayesian networks Mathus Dejori mathaeus.dejori.external@mchp.siemens, Siemens AG Schtzung der unterliegenden zusammengesetzten Wahrscheinlichkeitsdichte aus den Daten;Mathus Dejori, Siemens AG Graphical model Combines probablity theory and graph theory is defined

  7. PD Dr. Martin Stetter, Siemens AG 1 Das lineare Modell

    E-Print Network [OSTI]

    Popeea, Corneliu - Chair for Foundations of Software Reliability and Theoretical Computer Science

    PD Dr. Martin Stetter, Siemens AG 1 Das lineare Modell Ausgangspunkt: Lineares Perceptron vorgegeben, werden nicht gelernt #12;PD Dr. Martin Stetter, Siemens AG 2 Geschrieben als Regressionsmodell Regression: Lineares Modell #12;PD Dr. Martin Stetter, Siemens AG 3 ML-Parameterschtzung des linearen

  8. PD Dr. Martin Stetter, Siemens AG 1 Optimierungsverfahren

    E-Print Network [OSTI]

    Popeea, Corneliu - Chair for Foundations of Software Reliability and Theoretical Computer Science

    PD Dr. Martin Stetter, Siemens AG 1 Optimierungsverfahren Optimierung konvexer Funktionen: Optimierungsverfahren #12;PD Dr. Martin Stetter, Siemens AG 2 Optimierung konvexer Funktionen Hufiges Problem bei Stetter, Siemens AG 3 Funktionen einer Variable )(wF 1D-Gradientenabstieg: Gehe ein kleines Stck

  9. AGS experiments -- 1996, 1997, 1998, 1999. Fifteenth edition

    SciTech Connect (OSTI)

    Lo Presti, P.

    1999-03-01T23:59:59.000Z

    This report is a compilation of two-page summaries for AGS experiments for FY 1996, FY 1997, FY 1998, FY 1999. The bulk of the experiments are for high energy physics and nuclear physics programs. Also included are the run schedules for the AGS for each of those years and a listing of publications of AGS experiments for 1982--1999.

  10. Enabling Event Tracing at Leadership-Class Scale through I/O Forwarding Middleware

    SciTech Connect (OSTI)

    Ilsche, Thomas [Technische Universitat Dresden] [Technische Universitat Dresden; Schuchart, Joseph [Technische Universitat Dresden] [Technische Universitat Dresden; Cope, Joseph [Argonne National Laboratory (ANL)] [Argonne National Laboratory (ANL); Kimpe, Dries [Argonne National Laboratory (ANL)] [Argonne National Laboratory (ANL); Jones, Terry R [ORNL] [ORNL; Knuepfer, Andreas [Technische Universitat Dresden] [Technische Universitat Dresden; Iskra, Kamil [Argonne National Laboratory (ANL)] [Argonne National Laboratory (ANL); Ross, Robert [Argonne National Laboratory (ANL)] [Argonne National Laboratory (ANL); Nagel, Wolfgang E. [Technische Universitat Dresden] [Technische Universitat Dresden; Poole, Stephen W [ORNL] [ORNL

    2012-01-01T23:59:59.000Z

    Event tracing is an important tool for understanding the performance of parallel applications. As concurrency increases in leadership-class computing systems, the quantity of performance log data can overload the parallel file system, perturbing the application being observed. In this work we present a solution for event tracing at leadership scales. We enhance the I/O forwarding system software to aggregate and reorganize log data prior to writing to the storage system, significantly reducing the burden on the underlying file system for this type of traffic. Furthermore, we augment the I/O forwarding system with a write buffering capability to limit the impact of artificial perturbations from log data accesses on traced applications. To validate the approach, we modify the Vampir tracing tool to take advantage of this new capability and show that the approach increases the maximum traced application size by a factor of 5x to more than 200,000 processors.

  11. ~mcupkric EnviroMvnr Vol. IS. No. IO, pp. 1969-2002. 1984 Pnnted in Great Britain.

    E-Print Network [OSTI]

    Hunt, Julian

    ~mcupkric EnviroMvnr Vol. IS. No. IO, pp. 1969-2002. 1984 Pnnted in Great Britain. ocKJ4-6981/84 13 diffusion, stratified flow, wind tunnel, towing tank, complex terrain, air pollution. NOMENCLATURE constant

  12. Investigation and design of a network, I/O and storage SDC susceptibility analzer

    SciTech Connect (OSTI)

    Dubois, Andrew [Los Alamos National Laboratory; Dubois, David [Los Alamos National Laboratory; Michalak, Sarah [Los Alamos National Laboratory

    2011-01-19T23:59:59.000Z

    This slide deck is intended for the Durmstrang Team Quarterly Review to be held January 25, 2011 in Baltimore, MD. The slides provide an overview of the Investigation and Design of a Network, I/O and Storage SDC Susceptibility Analyzer project. In addition, the slides provide the goals of the project, details of the work done to date and the project status and future work.

  13. I/O Router Placement and Fine-Grained Routing on Titan to Support Spider II

    SciTech Connect (OSTI)

    Ezell, Matthew A [ORNL] [ORNL; Dillow, David [None] [None; Oral, H Sarp [ORNL] [ORNL; Wang, Feiyi [ORNL] [ORNL; Tiwari, Devesh [ORNL] [ORNL; Maxwell, Don E [ORNL] [ORNL; Leverman, Dustin B [ORNL] [ORNL; Hill, Jason J [ORNL] [ORNL

    2014-01-01T23:59:59.000Z

    The Oak Ridge Leadership Computing Facility (OLCF) introduced the concept of Fine-Grained Routing in 2008 to improve I/O performance between the Jaguar supercomputer and Spider, OLCF s center-wide Lustre file system. Fine-grained routing organizes I/O paths to minimize congestion. Jaguar has since been upgraded to Titan, providing more than a ten-fold improvement in peak performance. To support the center s increased computational capacity and I/O demand, the Spider file system has been replaced with Spider II. Building on the lessons learned from Spider, an improved method for placing LNET routers was developed and implemented for Spider II. The fine-grained routing scripts and configuration have been updated to provide additional optimizations and better match the system setup. This paper presents a brief history of fine-grained routing at OLCF, an introduction to the architectures of Titan and Spider II, methods for placing routers in Titan, and details about the fine-grained routing configuration.

  14. Temperature dependent effects during Ag deposition on Cu(110)

    SciTech Connect (OSTI)

    Taylor, T.N.; Muenchausen, R.E.; Hoffbauer, M.A.; Denier van der Gon, A.W.; van der Veen, J.F. (Los Alamos National Lab., NM (USA); FOM-Instituut voor Atoom-en Molecuulfysica, Amsterdam (Netherlands))

    1989-01-01T23:59:59.000Z

    The composition, structure, and morphology of ultrathin films grown by Ag deposition on Cu(110) were monitored as a function of temperature using low-energy electron diffraction (LEED), Auger electron spectroscopy (AES), and medium energy ion scattering (MEIS). Aligned backscattering measurements with 150 keV He ions indicate that the Ag resides on top of the Cu and there is no significant surface compound formation. Measurements with LEED show that the Ag is initially confined to the substrate troughs. Further deposition forces the Ag out of the troughs and results in a split c(2 {times} 4) LEED pattern, which is characteristic of a distorted Ag(111) monolayer template. As verified by both AES and MEIS measurements, postmonolayer deposition of Ag on Cu(110) at 300K leads to a pronounced 3-dimensional clustering. Ion blocking analysis of the Ag clusters show that the crystallites have a (110)-like growth orientation, implying that the Ag monolayer template undergoes a rearrangement. These data are confirmed by low temperature LEED results in the absence of clusters, which indicate that Ag multilayers grow from a Ag--Cu interface where the Ag is captured in the troughs. Changes observed in the film structure and morphology are consistent with a film growth mechanism that is driven by overlayer strain response to the substrate corrugation. 16 refs., 4 figs.

  15. IR-4 Ornamental Horticulture Program Trial Report

    E-Print Network [OSTI]

    Lieth, J. Heinrich

    the height is determined by the lengths of the blades of grass. This was not affected by Pendulum. The width was supported through funding from the USDA IR-4 Program, Western Region based at UC Davis, Davis, CA. Personnel (plant culture, data collection). The materials being tested were supplied by the manufacturer

  16. IRS Contribution Limits and OSU Retirement Programs

    E-Print Network [OSTI]

    Veiga, Pedro Manuel Barbosa

    Impact: OTRS requires contributions on total compensation (salary plus benefits) without regardIRS Contribution Limits and OSU Retirement Programs The OSU Defined Contribution Plan (DCP), (for Revenue Code 401(a). The Internal Revenue Code restrictions on employer-paid contributions make

  17. US-CERT Control System Center Input/Output (I/O) Conceputal Design

    SciTech Connect (OSTI)

    Not Available

    2005-02-01T23:59:59.000Z

    This document was prepared for the US-CERT Control Systems Center of the National Cyber Security Division (NCSD) of the Department of Homeland Security (DHS). DHS has been tasked under the Homeland Security Act of 2002 to coordinate the overall national effort to enhance the protection of the national critical infrastructure. Homeland Security Presidential Directive HSPD-7 directs the federal departments to identify and prioritize critical infrastructure and protect it from terrorist attack. The US-CERT National Strategy for Control Systems Security was prepared by the NCSD to address the control system security component addressed in the National Strategy to Secure Cyberspace and the National Strategy for the Physical Protection of Critical Infrastructures and Key Assets. The US-CERT National Strategy for Control Systems Security identified five high-level strategic goals for improving cyber security of control systems; the I/O upgrade described in this document supports these goals. The vulnerability assessment Test Bed, located in the Information Operations Research Center (IORC) facility at Idaho National Laboratory (INL), consists of a cyber test facility integrated with multiple test beds that simulate the nation's critical infrastructure. The fundamental mission of the Test Bed is to provide industry owner/operators, system vendors, and multi-agency partners of the INL National Security Division a platform for vulnerability assessments of control systems. The Input/Output (I/O) upgrade to the Test Bed (see Work Package 3.1 of the FY-05 Annual Work Plan) will provide for the expansion of assessment capabilities within the IORC facility. It will also provide capabilities to connect test beds within the Test Range and other Laboratory resources. This will allow real time I/O data input and communication channels for full replications of control systems (Process Control Systems [PCS], Supervisory Control and Data Acquisition Systems [SCADA], and components). This will be accomplished through the design and implementation of a modular infrastructure of control system, communications, networking, computing and associated equipment, and measurement/control devices. The architecture upgrade will provide a flexible patching system providing a quick ''plug and play''configuration through various communication paths to gain access to live I/O running over specific protocols. This will allow for in-depth assessments of control systems in a true-to-life environment. The full I/O upgrade will be completed through a two-phased approach. Phase I, funded by DHS, expands the capabilities of the Test Bed by developing an operational control system in two functional areas, the Science & Technology Applications Research (STAR) Facility and the expansion of various portions of the Test Bed. Phase II (see Appendix A), funded by other programs, will complete the full I/O upgrade to the facility.

  18. Simultaneous MS-IR Studies of Surface Formate Reactivity Under...

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

    MS-IR Studies of Surface Formate Reactivity Under Methanol Synthesis Conditions on CuSiO2. Simultaneous MS-IR Studies of Surface Formate Reactivity Under Methanol Synthesis...

  19. Vehicle Technologies Office Merit Review 2015: IR Thermography...

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

    IR Thermography as a Non-Destructive Evaluation (NDE) Tool for Lithium-Ion Battery Manufacturing Vehicle Technologies Office Merit Review 2015: IR Thermography as a Non-Destructive...

  20. On the Automation of Encoding Processes in the Quantum IO Monad

    E-Print Network [OSTI]

    James Barratt

    2012-10-02T23:59:59.000Z

    It is now clear that the use of resilient encoding schemes will be required for any quantum computing device to be realised. However, quantum programmers of the future will not wish to be tied up in the particulars of such encoding schemes. Quantum programming languages and libraries are already being developed, one of which is the Quantum IO Monad. QIO, as it is often abbreviated to, provides an interface to define and simulate quantum computations via a library of functions written in Haskell, a purely functional programming language. A solution is presented that takes an arbitrary QIO program and returns an equivalent program incorporating some specified quantum error correction techniques.

  1. OpenMortar.io: An Extensible Sensing and Control Platform for Building Energy Management

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn'tOrigin of Contamination in ManyDepartment ofOil's Impact onDepartment ofStorageOpenMortar.io: An

  2. Parallel I/O Software Infrastructure for Large-Scale Systems

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Science (SC)IntegratedSpeeding access toTestPhysics LabInterconnection RiskMarchParallel I/O

  3. Double dumbbell shaped AgNi alloy by pulsed electrodeposition

    SciTech Connect (OSTI)

    Dhanapal, K.; Vasumathi, M.; Santhi, Kalavathy [Materials Science Centre, Department of Nuclear Physics, University of Madras, Guindy Campus, Chennai 600 025 (India); Narayanan, V., E-mail: stephen-arum@hotmail.com; Stephen, A., E-mail: stephen-arum@hotmail.com [Department of Inorganic Chemistry, University of Madras, Guindy Campus, Chennai-600 025 (India)

    2014-01-28T23:59:59.000Z

    Silver-Nickel is the well-known thermally immiscible system that makes them quite complex for the formation of alloy. This kind of alloy can be attained from electrodeposition method. In the present work, AgNi alloy was synthesized by pulsed electrodeposition in a single bath two electrode system with the use of anodic alumina membrane. The prepared AgNi alloy and pure Ag were characterized with X-ray Diffraction (XRD) for structural confirmation, Scanning Electron Microscopy (SEM) for morphological, and magnetic properties by Vibrating Sample Magnetometer, respectively. The X-ray Diffraction study shows the formation of cubic structure for pure Ag. SEM analysis reveals the double dumbbell morphology for AgNi alloy and spherically agglomeration for pure silver. Hysteresis behaviour from VSM measurement indicates that the AgNi alloy have good ferro-magnetic properties.

  4. IO6490

    Office of Legacy Management (LM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOn AprilA group currentBradleyTableSelling CorpNewCF INDUSTRIES,L? .-I I ,Is II:c*1 ' f. (5

  5. IO2566

    Office of Legacy Management (LM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOn AprilA groupTuba City, Arizona, DisposalFourthNrr-osams ADMIN551 - g 7635U 93 -256566

  6. Extreme Galactic-Winds and Starburst in IR Mergers and IR QSOs

    E-Print Network [OSTI]

    S. Lipari; D. Sanders; R. Terlevich; S. Veilleux; R. Diaz; Y. Taniguchi; W. Zheng; D. Kim; Z. Tsvetanov; G. Carranza; H. Dottori

    2000-07-20T23:59:59.000Z

    We report -as a part of a long-term study of mergers and IR QSOs- detailed spectroscopic evidences for outflow (OF) and/or Wolf Rayet features in: (i) low velocity OF in the ongoing mergers NGC 4038/39 and IRAS 23128-5919; (ii) extreme velocity OF (EVOF) in the QSOs IRAS 01003-2238 and IRAS 13218+0552; (iii) OF and EVOF in a complete sample of ultra-luminous IR galaxies/QSOs ("The IRAS 1 Jy MKO-KPNO Survey", of 118 objects). We found EVOF in IRAS 11119+3257, 14394+5332, 15130+1958 and 15462-0450. The OF components detected in these objects were mainly associated to starburst processes: i.e., to galactic-winds generated in multiple type II SN explosions and massive stars. The EVOF were detected in objects with strong starburst plus obscured IR QSOs; which suggest that interaction of both processes could generate EVOF. In addition, we analyze the presence of Wolf Rayet features in the large sample of Bright PG-QSOs (Boroson and Green 1992), and nearby mergers and galactic-wind galaxies. We found clear WR features in the Fe II QSOs (type I): PG 1244+026, 1444+407, 1448+273, 1535+547; and in the IR merger Arp 220. HST archive images of IR+BAL QSOs show in practically all of these objects "arc or shell" features probably associated to galactic-winds (i.e., to multiple type II SN explosions) and/or merger processes. Finally, we discuss the presence of extreme starburst and galactic wind as a possible evolutive link between IR merger and IR QSOs; where the relation between mergers and extreme starburst (with powerful galactic-winds) plays in important role, in the evolution of galaxies.

  7. ag superlens suitable: Topics by E-print Network

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

    Providing habitat for hosts of various diseases such as malaria Bowen, James D. 25 Siemens AG 2009. All rights reserved. Investitionsmanagement Biology and Medicine Websites...

  8. anlagenbau ag o-1140: Topics by E-print Network

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

    of this phenomenon have concentrated on ion Nordlund, Kai 103 Panasonic Electric Works Europe AG panasonic-electric-works.com CCELERATIONSENSORS,IGHTSENSORS0RESSURESENSORS)NFOR...

  9. ag brennelementewerk hanau: Topics by E-print Network

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

    of this phenomenon have concentrated on ion Nordlund, Kai 104 Panasonic Electric Works Europe AG panasonic-electric-works.com CCELERATIONSENSORS,IGHTSENSORS0RESSURESENSORS)NFOR...

  10. METAL MEDIA FILTERS, AG-1 SECTION FI

    SciTech Connect (OSTI)

    Adamson, D.

    2012-05-23T23:59:59.000Z

    One application of metal media filters is in various nuclear air cleaning processes including applications for protecting workers, the public and the environment from hazardous and radioactive particles. To support this application the development of the ASME AG-1 FI Standard on Metal Media has been under way for more than ten years. Development of the proposed section has required resolving several difficult issues associated with operating conditions (media velocity, pressure drop, etc.), qualification testing, and quality acceptance testing. Performance characteristics of metal media are dramatically different than the glass fiber media with respect to parameters like differential pressures, operating temperatures, media strength, etc. These differences make existing data for a glass fiber media inadequate for qualifying a metal media filter for AG-1. In the past much work has been conducted on metal media filters at facilities such as Lawrence Livermore National Laboratory (LLNL) and Savannah River National Laboratory (SRNL) to qualify the media as High Efficiency Particulate Air (HEPA) Filters. Particle retention testing has been conducted at Oak Ridge Filter Test Facility and at Air Techniques International (ATI) to prove that the metal media meets or exceeds the 99.97% particle retention required for a HEPA Filter. Even with his testing, data was lacking to complete an AG-1 FI Standard on metal media. With funding secured by Mississippi State University (MSU) from National Nuclear Security Administration (NNSA), a research test stand is being designed and fabricated at MSU's Institute for Clean Energy Technology (ICET) Facility to obtain qualification data on metal media. This in turn will support required data needed for the FI Standard. The paper will discuss in detail how the test stand at MSU will obtain the necessary data to complete the FI Standard.

  11. Modelling of the AGS using Zgoubi - Status

    SciTech Connect (OSTI)

    Meot F.; Ahrens, L.; Dutheil, Y.; Glenn, J.; Huang, H.; Roser, T.; Schoefer, V.; Tsoupas, N.

    2012-05-20T23:59:59.000Z

    This paper summarizes the progress achieved so far, and discusses various outcomes, regarding the development of a model of the Alternating Gradient Synchrotron at the RHIC collider. The model, based on stepwise ray-tracing methods, includes beam and polarization dynamics. This is an on-going work, and a follow-on of code developments and particle and spin dynamics simulations that have been subject to earlier publications at IPAC and PAC [1, 2, 3]. A companion paper [4] gives additional informations, regarding the use of the measured magnetic field maps of the AGS main magnets.

  12. EOP Biodiesel AG | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual SiteofEvaluating A Potential MicrohydroDistrict ofDongjinDynetek42EOP Biodiesel AG Jump to:

  13. Energie AG Oberoesterreich | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual SiteofEvaluating A PotentialJump to:Emminol Jump to:Energ tica CamposEnergie AG

  14. City Solar AG | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand JumpConceptual Model, click here.TelluricPower InternationalChuichu,CimaCiris EnergyBocaAG Place: Bad

  15. Seeger Engineering AG | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro Industries Pvt Ltd JumpInformationScotts Corners, NewSeeger Engineering AG Jump to:

  16. MVV Energie AG | Open Energy Information

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    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual Siteof Energy 2,AUDIT REPORTEnergyFarmsPower CoLongxing Wind PowerMCFMVV Energie AG Jump

  17. Offshore Ostsee Wind AG | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual Siteof Energy 2,AUDIT REPORTEnergyFarmsPowerKaitianOstsee Wind AG Jump to: navigation,

  18. AG Land 5 | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTriWildcat 1 WindtheEnergySulfonate asAEE Solaridentification,3 Jump to:AG

  19. Ag Fuels Ltd | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTriWildcat 1AMEE JumpAeroWind Inc.Information AfluenteAg Fuels Ltd

  20. AgRefresh | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTriWildcat 1AMEE JumpAeroWind Inc.Information AfluenteAg

  1. SMA Technologie AG | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty Edit with form HistoryRistma AG Jump to:Energy InformationSSITASK EnergySMA

  2. Huber and Suhner AG | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are8COaBulkTransmissionSitingProcess.pdfGetecGtel Jump to:Pennsylvania:County,Ohio: Energy ResourcesHuberand Suhner AG

  3. Denker Wulf AG | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual SiteofEvaluating A Potential Microhydro SiteDayton Power &Denker Wulf AG Jump to:

  4. SolarWorld AG | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-f < RAPID‎SolarCity Corp Jump to: navigation, searchSolarWorld AG

  5. Centrosolar Group AG | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual Siteof EnergyInnovation inOpenadd: China DatangCentral ElCentralCentrosolar Group AG Jump

  6. EnerVest AG | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual Siteof Energy 2,AUDIT REPORTEnergy OffshoreDeveloper -Neo Jump to:EnerVest AG Jump to:

  7. Edisun Power AG | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand JumpConceptual Model,DOEHazel Crest, Illinois:Edinburgh University aka Wave PowerEdisun Power AG Jump

  8. KoRenta AG | Open Energy Information

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    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual SiteofEvaluatingGroup |Jilin Zhongdiantou New EnergyKenosistecKilaraKoRenta AG Jump to:

  9. Komax Holding AG | Open Energy Information

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    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual SiteofEvaluatingGroup |Jilin Zhongdiantou New EnergyKenosistecKilaraKoRenta AGKomax Holding AG

  10. SolarTec AG | Open Energy Information

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    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty Edit with form HistoryRistmaSinosteelSolar Energy sroWiki PageSolarPacesSolarTec AG

  11. Sunseeker Energy Holding AG | Open Energy Information

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    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty Edit with formSoutheastern ILSunseeker Energy Holding AG Jump to: navigation, search

  12. Cross Capital AG | Open Energy Information

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    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty EditCalifornia:PowerCER.pngRoofs and Heat Islands2007)Criterion JumpHills WindAG Jump

  13. Bos ten AG | Open Energy Information

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    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:EzfeedflagBiomass ConversionsSouthby 2022Illinois:InformationInformationBos ten AG

  14. Roth Rau AG | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro Industries Pvt Ltd Jump to:Roscommon County, Michigan: EnergyRosendaleRossie,Roswell,Rau AG

  15. TriWo AG | Open Energy Information

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    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro IndustriesTown of Ladoga, Indiana (UtilityTri-State Electric Member Corp Jump to:TriWo AG Jump

  16. In Trust AG | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual SiteofEvaluatingGroup | OpenHunan Runhua New EnergyIT PowerImagine Energy IncIn Trust AG Jump

  17. Scientific Data Services -- A High-Performance I/O System with Array Semantics

    SciTech Connect (OSTI)

    Wu, Kesheng; Byna, Surendra; Rotem, Doron; Shoshani, Arie

    2011-09-21T23:59:59.000Z

    As high-performance computing approaches exascale, the existing I/O system design is having trouble keeping pace in both performance and scalability. We propose to address this challenge by adopting database principles and techniques in parallel I/O systems. First, we propose to adopt an array data model because many scientific applications represent their data in arrays. This strategy follows a cardinal principle from database research, which separates the logical view from the physical layout of data. This high-level data model gives the underlying implementation more freedom to optimize the physical layout and to choose the most effective way of accessing the data. For example, knowing that a set of write operations is working on a single multi-dimensional array makes it possible to keep the subarrays in a log structure during the write operations and reassemble them later into another physical layout as resources permit. While maintaining the high-level view, the storage system could compress the user data to reduce the physical storage requirement, collocate data records that are frequently used together, or replicate data to increase availability and fault-tolerance. Additionally, the system could generate secondary data structures such as database indexes and summary statistics. We expect the proposed Scientific Data Services approach to create a live storage system that dynamically adjusts to user demands and evolves with the massively parallel storage hardware.

  18. Proc. the 24th Annual ACM Symposium on Applied Computing, March 2009. DARAW: A New Write Buffer to Improve Parallel I/O Energy-Efficiency

    E-Print Network [OSTI]

    Qin, Xiao

    on the reliability of parallel I/O systems. Third, numerous power-state transitions impose significant energy, energy dissipation in the storage system may not necessarily be reduced. This is due the fact that power data centers today employ huge quantities of I/O systems, which consume a large amount of energy. Most

  19. Ag/AgBr/g-C{sub 3}N{sub 4}: A highly efficient and stable composite photocatalyst for degradation of organic contaminants under visible light

    SciTech Connect (OSTI)

    Cao, Jing, E-mail: caojing@mail.ipc.ac.cn [College of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, Anhui (China); State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100 (China); Zhao, Yijie; Lin, Haili; Xu, Benyan [College of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, Anhui (China); Chen, Shifu, E-mail: chshifu@chnu.edu.cn [College of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, Anhui (China)

    2013-10-15T23:59:59.000Z

    Graphical abstract: Ag/AgBr/g-C{sub 3}N{sub 4} composite photocatalysts displayed excellent photocatalytic activities on the degradation of methyl orange (MO) under visible light. The improved photocatalytic performance and stability of Ag/AgBr/g-C{sub 3}N{sub 4} originated from the synergetic effects of AgBr/g-C{sub 3}N{sub 4} interface and metallic Ag nanoparticles. O{sub 2}?, one of the reactive species, was responsible for the photodegradation of MO compared to H+ and OH. - Highlights: Novel Ag/AgBr/g-C{sub 3}N{sub 4} composite photocatalyst was reported. Ag/AgBr/g-C{sub 3}N{sub 4} had novel energy band combination between AgBr and g-C{sub 3}N{sub 4}. Synergetic effects of AgBr/g-C{sub 3}N{sub 4} interface and metallic Ag nanoparticles. Electron trapping role of metallic Ag dominated the stability of Ag/AgBr/g-C{sub 3}N{sub 4}. - Abstract: Novel Ag/AgBr/g-C{sub 3}N{sub 4} composite photocatalysts were constructed via depositionprecipitation method and extensively characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM) and UVvis diffuse reflectance spectroscopy (DRS). Under visible light (? > 420 nm), Ag/AgBr/g-C{sub 3}N{sub 4} composite photocatalysts displayed much higher photocatalytic activities than those of Ag/AgBr and g-C{sub 3}N{sub 4} for degradation of methyl orange (MO). 50% Ag/AgBr/g-C{sub 3}N{sub 4} presented the best photocatalytic performance, which was mainly attributed to the synergistic effects of AgBr/g-C{sub 3}N{sub 4} interface and the in situ metallic Ag nanoparticles for efficiently separating electronhole pairs. Furthermore, Ag/AgBr/g-C{sub 3}N{sub 4} remained good photocatalytic activity through 5 times of cycle experiments. Additionally, the radical scavengers experiment indicated that O{sub 2}{sup ?} was the main reactive species for the MO degradation under visible light.

  20. EXCURSION: enterprises in our region "Centrotherm photovoltaics AG"

    E-Print Network [OSTI]

    Pfeifer, Holger

    EXCURSION: enterprises in our region "Centrotherm photovoltaics AG" 4th of November 2009 Invitation of a German enterprise called centrotherm photovoltaics AG in Blaubeuren. They are providers of technology and services for the photovoltaics industry. For organizational reasons we ask you to register for this visit

  1. Microwave-assisted solvothermal synthesis of flower-like Ag/AgBr/BiOBr microspheres and their high efficient photocatalytic degradation for p-nitrophenol

    SciTech Connect (OSTI)

    Li, Tingting, E-mail: tingtingli1983@hotmail.com [Department of Chemistry and Chemical Engineering, Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Changsha 410082 (China); State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082 (China); Department of Environment and Chemical Engineering, Key Laboratory of Jiangxi Province for Ecological Diagnosis, Remediation and Pollution Control, Nanchang Hangkong University, Nanchang 330063 (China); Luo, Shenglian, E-mail: sllou@hnu.edu.cn [Department of Chemistry and Chemical Engineering, Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Changsha 410082 (China); State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082 (China); Department of Environment and Chemical Engineering, Key Laboratory of Jiangxi Province for Ecological Diagnosis, Remediation and Pollution Control, Nanchang Hangkong University, Nanchang 330063 (China); Yang, Lixia [Department of Environment and Chemical Engineering, Key Laboratory of Jiangxi Province for Ecological Diagnosis, Remediation and Pollution Control, Nanchang Hangkong University, Nanchang 330063 (China)

    2013-10-15T23:59:59.000Z

    Flower-like Ag/AgBr/BiOBr microspheres were successfully fabricated by the approach of microwave-assisted solvothermal and in situ photo-assisted reduction. A reactive ionic liquid 1-hexadecyl-3-methylimidazolium bromide ([C{sub 16}mim]Br) was employed as Br source in the presence of surfactant polyvinylpyrrolidone (PVP). The photocatalytic activity of Ag/AgBr/BiOBr towards the decomposition of p-nitrophenol under visible light irradiation was evaluated. The results indicated that Ag/AgBr/BiOBr showed enhanced photocatalytic activity towards p-nitrophenol, comparing with P25, BiOBr and Ag/AgBr. More than 96% of p-nitrophenol was decomposed in 3.5 h under visible-light irradation. The excellent photocatalytic activity of flower-like Ag/AgBr/BiOBr microspheres can be attributed to the large specific surface area, strong visible-light absorption, suitable energy band structure and surface plasmon resonance effect of Ag nanoparticles. The possible photocatalytic mechanism was proposed based on the active species test and band gap structure analysis. - Graphical abstract: The photocatalytic reaction mechanisms of the as-prepared Ag/AgBr/BiOBr. Display Omitted - Highlights: Successful synthesis of flower-like Ag/AgBr/BiOBr microspheres. The Ag/AgBr/BiOBr showed much higher photocatalytic activity towards p-nitrophenol as compared to BiOBr and Ag/AgBr. The reasons for the excellent photocatalytic activity are the large specific surface area, strong visible-light absorption and surface plasmon resonance effect of Ag nanoparticles. The O{sub 2}{sup ?}, Br{sup 0} and photogenerated h{sup +} play key roles in the photocatalytic degradation process.

  2. SESSION IO: Analogto-Digital Converters TPM 10.6: An18b lops Self-calibratingADC

    E-Print Network [OSTI]

    Lee, Hae-Seung "Harry"

    on this chip includes calibration pattern generaton, a successive approx- imation register (SAR), elementsSESSION IO: Analogto-Digital Converters TPM 10.6: An18b lops Self-calibratingADC Gerald, Miller Wilmington, MA AUTO-CALIBRATION has been used in monolithic ADCs to extend the limits of accuracy

  3. On-Line Weld NDE with IR Thermography

    Broader source: Energy.gov (indexed) [DOE]

    non-destructive evaluation (NDE) technology for RSW quality monitoring based on infrared (IR) thermography that can be adopted reliably and cost-effectively in high-volume...

  4. On-Line Weld NDE with IR Thermography

    Broader source: Energy.gov (indexed) [DOE]

    (NDE) technology for resistance spot weld (RSW) quality monitoring based on infrared (IR) thermography that can be adopted reliably and cost-effectively in high-volume...

  5. ag samples show: Topics by E-print Network

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

    in a low density region sim 30-300 AU from the central binary. Scott J. Kenyon; Daniel Proga; Charles D. Keyes 2001-03-26 29 Ag Communications Communications and Media...

  6. AG3 srl (spin off universitario) Anno di costituzione: 2011

    E-Print Network [OSTI]

    Sproston, Jeremy

    geologia, della geofisica e della geotermia. AG3 vuole dare una risposta alle nuove esigenze energetiche, nelle georisorse, nella geochimica, nella la geofisica, nel remote sensing, nella perforazione del

  7. Polarized proton acceleration at the BNL AGS, 1988

    SciTech Connect (OSTI)

    Ahrens, L.

    1988-01-01T23:59:59.000Z

    The present status of the polarized proton acceleration at the Brookhaven AGS is described. Some details regarding the tune-up and performance during the December 1987-January 1988 physics run are given. 2 refs., 4 figs.

  8. ag films grown: Topics by E-print Network

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

    conduction-band states of NiO 100 thin films grown onto Ag 100 have charac- terized NiO monocrystalline thin films has shown up both onto insulating i.e., MgO, Ref. 21 Marcon,...

  9. ag thin films: Topics by E-print Network

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

    MgO, Ref. 21 Marcon, Marco 2 Multi-level surface enhanced Raman scattering using AgOx thin film Physics Websites Summary: by applying laser-direct writing (LDW) technique on...

  10. ag fe ni: Topics by E-print Network

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

    conduction-band states of NiO 100 thin films grown onto Ag 100 have charac- terized NiO monocrystalline thin films has shown up both onto insulating i.e., MgO, Ref. 21 Marcon,...

  11. Which Oxidation State Leads to O-O Bond Formation in Cp*Ir(bpy)Cl-Catalyzed Water Oxidation, Ir(V), Ir(VI), or Ir(VII)?

    E-Print Network [OSTI]

    Liao, Rongzhen

    Which Oxidation State Leads to O-O Bond Formation in Cp*Ir(bpy)Cl-Catalyzed Water Oxidation, Ir: Density functional calculations are used to revisit the reaction mechanism of water oxidation catalyzed oxidation at higher oxidation state even though it can also promote O-O bond formation. Therefore, [(bpy

  12. Moving Object Detection and Compression in IR Sequences

    E-Print Network [OSTI]

    Agrawal, Amit

    infrared (IR) sensors. The aim is to use IR image sequences to detect moving objects (humans or vehicles computational power of computing devices attached to the sensor, the algorithms should be computationally simple implemented in C/C++ and their performance has been evaluated the using Hitachi's SH4 platform with software

  13. Growth of graphene on Ir(111) Johann Coraux1

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    Growth of graphene on Ir(111) Johann Coraux1 ,, Alpha T. N'Diaye1 , Martin Engler1 , Carsten Busse a renewed interest as a route towards high quality graphene prepared in a reproducible manner. Here we employ two growth methods for graphene on Ir(111), namely room temperature adsorption and thermal

  14. Commissioning of the new AGS MMPS transformers

    SciTech Connect (OSTI)

    Bajon,E.; Badea, V. S.; Bannon, M.; Bonati, R.; Marneris, I. M.; Porqueddu, r.; Roser, T.; Sandberg, J.; Savatteri, S.

    2009-05-04T23:59:59.000Z

    The Brookhaven AGS Main Magnet Power Supply (MMPS) is a thyristor control supply rated at 5500 Amps. +/-9000 Volts. The peak magnet power is 50 MWatts. The power supply is fed from a motor/generator manufactured by Siemens. During rectify and invert operation the P Bank power supplies are used. During the flattops the F Bank power supplies are used. The P Bank power supplies are fed from two 23 MVA transformers and the F Bank power supplies are fed from two 5.3 MYA transformers. The fundamental frequency of the F Bank power supplies is 1440 Hz, however the fundamental frequency of the P banks was 720 Hz. It was very important to reduce the ripple during rectify to improve polarized proton operations. For this reason and also because the original transformers were 45 years old we replaced these transformers with new ones and we made the fundamental frequency of both P and F banks 1440 Hz. This paper will highlight the major hurdles that were involved during the installation of the new transformers. It will present waveforms while running at different power levels up to 6MW full load. It will show the transition from the F-Bank power supplies to the P-Banks and also show the improvements in ripple made on the P-Bank power supplies.

  15. Silver delafossite nitride, AgTaN{sub 2}?

    SciTech Connect (OSTI)

    Miura, Akira [Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen (Germany); Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853 (United States); Lowe, Michael; Leonard, Brian M.; Subban, Chinmayee V. [Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853 (United States); Masubuchi, Yuji; Kikkawa, Shinichi [Graduate School of Engineering, Hokkaido University, N13W8, Kita-ku Sapporo 060-8628 (Japan); Dronskowski, Richard [Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen (Germany); Hennig, Richard G. [Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853 (United States); Abruna, Hector D. [Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853 (United States); DiSalvo, Francis J., E-mail: fjd3@cornell.ed [Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853 (United States)

    2011-01-15T23:59:59.000Z

    A new silver nitride, AgTaN{sub 2}, was synthesized from NaTaN{sub 2} by a cation-exchange reaction, using a AgNO{sub 3}-NH{sub 4}NO{sub 3} flux at 175 {sup o}C. Its crystal structure type is delafossite (R3-bar m) with hexagonal lattice parameters of a=3.141(3) A, c=18.81(2) A, in which silver is linearly coordinated to nitrogen. Energy dispersive X-ray analysis and combustion nitrogen/oxygen analysis gave a composition with atomic ratios of Ag:Ta:N:O as 1.0:1.2(1):2.1(1):0.77(4), which is somewhat Ta rich and indicates some oxide formation. The X-ray photoelectron spectroscopy analysis showed a Ta- and O-rich surface and transmission electron microscope observation exhibited aggregates of ca. 4-5 nm-sized particles on the surface, which are probably related to the composition deviation from a AgTaN{sub 2}. The lattice parameters of stoichiometric AgTaN{sub 2} calculated by density functional theory agree with the experimental ones, but the possibility of some oxygen incorporation and/or silver deficiency is not precluded. -- Graphical abstract: A delafossite silver nitride, AgTaN{sub 2}, was synthesized from NaTaN{sub 2} by a cation-exchange reaction using a AgNO{sub 3}-NH{sub 4}NO{sub 3} flux. It contains N-Ag-N linear bonding. Display Omitted

  16. Simultaneous multi-beam planar array IR (pair) spectroscopy

    DOE Patents [OSTI]

    Elmore, Douglas L.; Rabolt, John F.; Tsao, Mei-Wei

    2005-09-13T23:59:59.000Z

    An apparatus and method capable of providing spatially multiplexed IR spectral information simultaneously in real-time for multiple samples or multiple spatial areas of one sample using IR absorption phenomena requires no moving parts or Fourier Transform during operation, and self-compensates for background spectra and degradation of component performance over time. IR spectral information and chemical analysis of the samples is determined by using one or more IR sources, sampling accessories for positioning the samples, optically dispersive elements, a focal plane array (FPA) arranged to detect the dispersed light beams, and a processor and display to control the FPA, and display an IR spectrograph. Fiber-optic coupling can be used to allow remote sensing. Portability, reliability, and ruggedness is enhanced due to the no-moving part construction. Applications include determining time-resolved orientation and characteristics of materials, including polymer monolayers. Orthogonal polarizers may be used to determine certain material characteristics.

  17. Transitions between the $4f$-core-excited states in Ir$^{16+}$, Ir$^{17+}$, and Ir$^{18+}$ ions for clock applications

    E-Print Network [OSTI]

    U. I. Safronova; V. V. Flambaum; M. S. Safronova

    2015-05-05T23:59:59.000Z

    Iridium ions near $4f$-$5s$ level crossings are the leading candidates for a new type of atomic clocks with a high projected accuracy and a very high sensitivity to the temporal variation of the fine structure constant $\\alpha$. To identify spectra of these ions in experiment accurate calculations of the spectra and electromagnetic transition probabilities should be performed. Properties of the $4f$-core-excited states in Ir$^{16+}$, Ir$^{17+}$, and Ir$^{18+}$ ions are evaluated using relativistic many-body perturbation theory and Hartree-Fock-Relativistic method (COWAN code). We evaluate excitation energies, wavelengths, oscillator strengths, and transition rates. Our large-scale calculations includes the following set of configurations: $4f^{14-k}5s^{m}5p^{n}$ with $(k+m+n)$ equal to 3, 2, and 1 for the Ir$^{16+}$, Ir$^{17+}$, and Ir$^{18+}$ ions, respectively. The $5s-5p$ transitions are illustrated by the synthetic spectra in the 180 - 200 \\AA range. Large contributions of magnetic-dipole transitions to lifetimes of low-lying states in the region below 2.5 Ry are demonstrated.

  18. International Journal of Artificial Intelligence in Education 13 (2003) 35-78 1560-4292/03/$8.00 ,, 2003 -IOS Press. All rights reserved

    E-Print Network [OSTI]

    Boyer, Edmond

    -4292/03/$8.00 ,, 2003 - IOS Press. All rights reserved STyLE-OLM: Interactive Open Learner Modelling Vania Dimitrova ­ a system called STyLE-OLM. The results from the study demonstrate potential benefits of the method

  19. notienefronteras Impacto del cambIo clImtIco en la comunIdad andIna

    E-Print Network [OSTI]

    El Cambio Climático notienefronteras Impacto del cambIo clImátIco en la comunIdad andIna #12 Ministerio de Medio Ambiente de España y la Agencia Española de Cooperación Internacional para el Desarrollo, María Teresa Cigarán y David Vásquez, en el marco de la Agenda Ambiental Andina. Coordinación técnica

  20. EDDY CURRENT EFFECT OF THE BNL-AGS VACUUM CHAMBER ON THE OPTICS OF THE BNL-AGS SYNCHROTRON.

    SciTech Connect (OSTI)

    TSOUPAS,N.; AHRENS,L.; BROWN,K.A.; GLENN,J.W.; GARDNER,K.

    1999-03-29T23:59:59.000Z

    During the acceleration cycle of the AGS synchrotron, eddy currents are generated within the walls of the vacuum chambers of the AGS main magnets. The vacuum chambers have elliptical cross section, are made of inconel material with a wall thickness of 2 mm and are placed within the gap of the combined-function main magnets of the AGS synchrotron. The generation of the eddy currents in the walls of the vacuum chambers, creates various magnetic multipoles, which affect the optics of the AGS machine. In this report these magnetic multipoles are calculated for various time interval starting at the acceleration cycle, where the magnetic field of the main magnet is {approx}0.1 T, and ending before the beam extraction process, where the magnetic field of the main magnet is almost constant at {approx}1.1 T. The calculations show that the magnetic multipoles generated by the eddy-currents affect the optics of the AGS synchrotron during the acceleration cycle and in particular at low magnetic fields of the main magnet. Their effect is too weak to affect the optics of the AGS machine during beam extraction at the nominal energies.

  1. Optimizing I/O Forwarding Techniques for Extreme-Scale Event Tracing

    SciTech Connect (OSTI)

    Ilsche, Thomas [Technische Universitat Dresden] [Technische Universitat Dresden; Schuchart, Joseph [Technische Universitat Dresden] [Technische Universitat Dresden; Cope, Joseph [Argonne National Laboratory (ANL)] [Argonne National Laboratory (ANL); Kimpe, Dries [Argonne National Laboratory (ANL)] [Argonne National Laboratory (ANL); Jones, Terry R [ORNL] [ORNL; Knuepfer, Andreas [Technische Universitat Dresden] [Technische Universitat Dresden; Iskra, Kamil [Argonne National Laboratory (ANL)] [Argonne National Laboratory (ANL); Ross, Robert [Argonne National Laboratory (ANL)] [Argonne National Laboratory (ANL); Nagel, Wolfgang E. [Technische Universitat Dresden] [Technische Universitat Dresden; Poole, Stephen W [ORNL] [ORNL

    2014-01-01T23:59:59.000Z

    Programming development tools are a vital com- ponent for understanding the behavior of parallel applica- tions. Event tracing is a principal ingredient to these tools, but new and serious challenges place event tracing at risk on extreme-scale machines. As the quantity of captured events increases with concurrency, the additional data can over- load the parallel file system and perturb the application be- ing observed. In this work we present a solution for event tracing on extreme-scale machines. We enhance an I/O for- warding software layer to aggregate and reorganize log data prior to writing to the storage system, significantly reduc- ing the burden on the underlying file system. Furthermore, we introduce a sophisticated write buffering capability to limit the impact. To validate the approach, we employ the Vampir tracing toolset using these new capabilities. Our re- sults demonstrate that the approach increases the maximum traced application size by a factor of 5x to more than 200,000 processes.

  2. 1010 IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. 43, NO. 4, APRIL 2008 A Scalable 515 Gbps, 1475 mW Low-Power I/O

    E-Print Network [OSTI]

    Palermo, Sam

    1010 IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. 43, NO. 4, APRIL 2008 A Scalable 515 Gbps, 1475 mW Low-Power I/O Transceiver in 65 nm CMOS Ganesh Balamurugan, Member, IEEE, Joseph Kennedy, Member, IEEE'Mahony, Bryan Casper, and Randy Mooney, Member, IEEE Abstract--We present a scalable low-power I/O transceiver

  3. UPGRADING THE AGS TO 1 MW PROTON BEAM POWER M.J. Brennan, I. Marneris, T. Roser, A.G. Ruggiero, D. Trbojevic, S.Y. Zhang

    E-Print Network [OSTI]

    McDonald, Kirk

    to RHIC. The AGS Booster was built to allow the injection of any species of heavy ion into the AGS. Trbojevic, S.Y. Zhang Brookhaven National Laboratory, UPTON, NY 11973, USA Worked performed under the auspices of the U.S.D.O.E. Abstract The Brookhaven Alternating Gradient Synchrotron (AGS) is a strong

  4. Progress and status of the AGS Booster project

    SciTech Connect (OSTI)

    Weng, W.T. (Brookhaven National Lab., Upton, NY (USA))

    1989-01-01T23:59:59.000Z

    New physics opportunities, such as: rare K-decay, neutrino and heavy ion physics demand that a rapid-cycling high vacuum and high intensity Booster be built for the AGS at Brookhaven National Laboratory. The circumference of the Booster ring is one-quarter that of the AGS. Three modes of operation for various particles are envisioned. For unpolarized protons, four Booster pulses would be injected at a 7.5 Hz repetition rate within a 400 ms flat bottom of the AGS, enabling the present 1.5 {times} 10{sup 13} ppp to be increased to 6 {times} 10{sup 13} ppp. The protons would be accelerated to 1.5 GeV although the bending capability provided for heavy ions would eventually allow protons to be accelerated to 2.5 GeV. For heavy ions the rep rates is about 1 Hz and only one pulse would be injected into the AGS. For polarized protons 20 or so pulses can be stored in the Booster ring before injecting them into the AGS. Provisions for mixed modes of operation into a super cycle has been provided for future needs. In this paper, the lattice design and magnet characteristics will be briefly reviewed and major design issues will be discussed and design choices explained. Finally, the construction status and schedule will be presented. 9 refs., 3 figs.

  5. Molecular Active Sites in Heterogeneous Ir-La/C Catalyzed Carbonylatio...

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

    Molecular Active Sites in Heterogeneous Ir-LaC Catalyzed Carbonylation of Methanol to Acetates. Molecular Active Sites in Heterogeneous Ir-LaC Catalyzed Carbonylation of Methanol...

  6. On-Line Weld NDE with IR Thermography

    Broader source: Energy.gov (indexed) [DOE]

    non-destructive evaluation (NDE) technology for spot weld quality monitoring based on infrared (IR) thermography that can be adopted reliably and cost-effectively in high-volume...

  7. Ir. Charles Mussche 8 Spruce St, New York

    E-Print Network [OSTI]

    Ir. Charles Mussche 8 Spruce St, New York 10038 NYC Mobile: +1 (347 at an industrial solar-energy project developer. Function: Autonomy Auditing New business in Renewable Energy Ecole Des Mines ParisTech Kassel University First Semester

  8. DWEA Webinar: IRS Guidance for Small Wind Turbines

    Broader source: Energy.gov [DOE]

    The U.S. Internal Revenue Service (IRS) has issued Notice 2015-4 providing new performance and quality standards of small wind turbines defined as having a nameplate capacity of up to 100 kW in...

  9. Evidence for hybrid surface metallic band in (4??4) silicene on Ag(111)

    SciTech Connect (OSTI)

    Tsoutsou, D., E-mail: dtsoutsou@ims.demokritos.gr; Xenogiannopoulou, E.; Golias, E.; Tsipas, P.; Dimoulas, A. [National Center for Scientific Research Demokritos, 15310 Athens (Greece)] [National Center for Scientific Research Demokritos, 15310 Athens (Greece)

    2013-12-02T23:59:59.000Z

    The electronic band structure of monolayer (4??4) silicene on Ag(111) is imaged by angle resolved photoelectron spectroscopy. A dominant hybrid surface metallic band is observed to be located near the bulk Ag sp-band which is also faintly visible. The two-dimensional character of the hybrid band has been distinguished against the bulk character of the Ag(111) sp-band by means of photon energy dependence experiments. The surface band exhibits a steep linear dispersion around the K{sup }{sub Ag} point and has a saddle point near the M{sup }{sub Ag} point of Ag(111) resembling the ?-band dispersion in graphene.

  10. IR-laser initiated combustion -- A step toward complete combustion

    SciTech Connect (OSTI)

    Laghai, A.; Nabavi, S.H.; Servati, H.B.; Syed, F.

    1996-09-01T23:59:59.000Z

    The new global environmental regulations for reducing the engine emissions from both moving and stationary sources, as well as improvement in fuel economy are the major motifs to obtain a perfect combustion process and exhaust aftertreatment methods. Infrared (IR)-Laser initiated combustion provides a very high initial temperature, which produces propagation of a turbulent thermopressure pulse that results in a fast burning and improved combustion. The role of IR is to maximize the heat generation efficiency.

  11. High intensity proton acceleration at the Brookhaven AGS -- An update

    SciTech Connect (OSTI)

    Ahrens, L.; Alessi, J.; Blaskiewicz, M. [Brookhaven National Lab., Upton, NY (United States). AGS Dept.] [and others

    1997-07-01T23:59:59.000Z

    The AGS accelerator complex is into its third year of 60+ {times} 10{sup 12} (teraproton = Tp) per cycle operation. The hardware making up the complex as configured in 1997 is briefly mentioned. The present level of accelerator performance is discussed. This includes beam transfer efficiencies at each step in the acceleration process, i.e. losses; which are a serious issue at this intensity level. Progress made in understanding beam behavior at the Linac-to-Booster (LtB) injection, at the Booster-to-AGS (BtA) transfer as well as across the 450 ms AGS accumulation porch is presented. The state of transition crossing, with the gamma-tr jump is described. Coherent effects including those driven by space charge are important at all of these steps.

  12. Liquid chromatography/Fourier transform IR spectrometry interface flow cell

    DOE Patents [OSTI]

    Johnson, Charles C. (Fairfield, OH); Taylor, Larry T. (Blacksburg, VA)

    1986-01-01T23:59:59.000Z

    A zero dead volume (ZDV) microbore high performance liquid chromatography (.mu.HPLC)/Fourier transform infrared (FTIR) interface flow cell includes an IR transparent crystal having a small diameter bore therein through which a sample liquid is passed. The interface flow cell further includes a metal holder in combination with a pair of inner, compressible seals for directly coupling the thus configured spectrometric flow cell to the outlet of a .mu.HPLC column end fitting to minimize the transfer volume of the effluents exiting the .mu.HPLC column which exhibit excellent flow characteristics due to the essentially unencumbered, open-flow design. The IR beam passes transverse to the sample flow through the circular bore within the IR transparent crystal, which is preferably comprised of potassium bromide (KBr) or calcium fluoride (CaF.sub.2), so as to minimize interference patterns and vignetting encountered in conventional parallel-plate IR cells. The long IR beam pathlength and lensing effect of the circular cross-section of the sample volume in combination with the refractive index differences between the solvent and the transparent crystal serve to focus the IR beam in enhancing sample detection sensitivity by an order of magnitude.

  13. Liquid chromatography/Fourier transform IR spectrometry interface flow cell

    DOE Patents [OSTI]

    Johnson, C.C.; Taylor, L.T.

    1985-01-04T23:59:59.000Z

    A zero dead volume (ZDV) microbore high performance liquid chromatography (..mu.. HPLC)/Fourier transform infrared (FTIR) interface flow cell includes an IR transparent crystal having a small diameter bore therein through which a sample liquid is passed. The interface flow cell further includes a metal holder in combination with a pair of inner, compressible seals for directly coupling the thus configured spectrometric flow cell to the outlet of a ..mu.. HPLC column end fitting to minimize the transfer volume of the effluents exiting the ..mu.. HPLC column which exhibit excellent flow characteristics due to the essentially unencumbered, open-flow design. The IR beam passes transverse to the sample flow through the circular bore within the IR transparent crystal, which is preferably comprised of potassium bromide (KBr) or calcium fluoride (CaF/sub 2/), so as to minimize interference patterns and vignetting encountered in conventional parallel-plate IR cells. The long IR beam pathlength and lensing effect of the circular cross-section of the sample volume in combination with the refractive index differences between the solvent and the transparent crystal serve to focus the IR beam in enhancing sample detection sensitivity by an order of magnitude.

  14. Analysis of resonance-driving imperfections in the AGS Booster

    SciTech Connect (OSTI)

    Gardner, C.; Shoji, Y.; Danby, G.; Glenn, J.W.; Jackson, G.J.; Soukas, A.; van Asselt, W.; Whalen, C.

    1994-08-01T23:59:59.000Z

    At the design intensity of 1.5 {times} 10{sup 13} ppp, the space charge tune shift in the AGS Booster at injection has been estimated to be about 0.35. The beam tunes are therefore spread over many lower order resonance lines and the associated stopbands must be corrected in order to minimize the amplitude growth due to resonance excitation. This requires proper compensation of the resonance-driving harmonics which result from random magnetic field errors. The observation and correction of second and third order resonance stopbands in the AGS Booster is reviewed, and an analysis of magnetic field imperfections based on the required corrections is given.

  15. Observation and correction of resonance stopbands in the AGS Booster

    SciTech Connect (OSTI)

    Gardner, C.; Shoji, Y.; Ahrens, L.; Glenn, J.W.; Lee, Y.Y.; Roser, T.; Soukas, A.; van Asselt, W.; Weng, W.T.

    1993-06-01T23:59:59.000Z

    At the design intensity of 1.5 {times} 10{sup 13} ppp, the space charge tune shift in the AGS Booster at injection has been estimated to be about 0.35. Therefore, the beam is spread over may lower order resonance lines and the stopbands have to be corrected to minimize the amplitude growth by proper compensation of the driving harmonics resulting from random errors. The observation and correction of second and third order resonance stopbands in the AGS Booster, and the establishment of a favorable operating point at high intensity are discussed.

  16. AGS to RHIC transfer line: Design and commissioning

    SciTech Connect (OSTI)

    MacKay, W.W; Ahrens, L.; Bennan, M.; Brown, K. [and others

    1996-09-01T23:59:59.000Z

    In the fall of 1995, we successfully completed a major milestone in the RHIC (Relativistic Heavy Ion Collider) project: the first beam test of the AGS (Alternating Gradient Synchrotron) to RHIC (ATR) transfer line. The ATR serves as a test bed for the new RHIC control system. This transfer line is highly instrumented, with several types of instrumentation for characterizing the extracted beam from AGS and for matching the beam into RHIC. We describe the design and performance of ATR with gold ions with an eye to reaching the design criteria for RHIC operation, both in beam quality and controls.

  17. Surface spin flip probability of mesoscopic Ag wires.

    SciTech Connect (OSTI)

    Mihajlovic, G.; Pearson, J. E.; Bader, S. D.; Hoffmann, A.

    2010-06-08T23:59:59.000Z

    Spin relaxation in mesoscopic Ag wires in the diffusive transport regime is studied via nonlocal spin valve and Hanle effect measurements performed on Permalloy/Ag lateral spin valves. The ratio between momentum and spin relaxation times is not constant at low temperatures. This can be explained with the Elliott-Yafet spin relaxation mechanism by considering the momentum surface relaxation time as being temperature dependent. We present a model to separately determine spin flip probabilities for phonon, impurity and surface scattering and find that the spin flip probability is highest for surface scattering.

  18. Level Structure of 103Ag at high spins

    E-Print Network [OSTI]

    S. Ray; N. S. Pattabiraman; Krishichayan; A. Chakraborty; S. Mukhopadhyay; S. S. Ghugre; S. N. Chintalapudi; A. K. Sinha; U. Garg; S. Zhu; B. Kharraja; D. Almehed

    2007-12-07T23:59:59.000Z

    High spin states in $^{103}$Ag were investigated with the Gammasphere array, using the $^{72}$Ge($^{35}$Cl,$2p2n$)$^{103}$Ag reaction at an incident beam energy of 135 MeV. A $\\Delta J$=1 sequence with predominantly magnetic transitions and two nearly-degenerate $\\Delta J=1$ doublet bands have been observed. The dipole band shows a decreasing trend in the $B(M1)$ strength as function of spin, a well established feature of magnetic bands. The nearly-degenerate band structures satisfy the three experimental signatures of chirality in the nuclei; however microscopic calculations are indicative of a magnetic phenomenon

  19. Pb-free Sn-Ag-Cu ternary eutectic solder

    DOE Patents [OSTI]

    Anderson, I.E.; Yost, F.G.; Smith, J.F.; Miller, C.M.; Terpstra, R.L.

    1996-06-18T23:59:59.000Z

    A Pb-free solder includes a ternary eutectic composition consisting essentially of about 93.6 weight % Sn-about 4.7 weight % Ag-about 1.7 weight % Cu having a eutectic melting temperature of about 217 C and variants of the ternary composition wherein the relative concentrations of Sn, Ag, and Cu deviate from the ternary eutectic composition to provide a controlled melting temperature range (liquid-solid ``mushy`` zone) relative to the eutectic melting temperature (e.g. up to 15 C above the eutectic melting temperature). 5 figs.

  20. AgFe Management Ltd | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTriWildcat 1AMEE JumpAeroWind Inc.Information AfluenteAg Fuels LtdAgFe

  1. Schnell Z ndstrahlmotoren AG Co KG | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty Edit with form HistoryRistma AG Jump638324°,Schnell Z ndstrahlmotoren AG Co KG Jump

  2. PD Dr. Martin Stetter, Siemens AG 1 Neuronale Verfahren zur Regression

    E-Print Network [OSTI]

    Popeea, Corneliu - Chair for Foundations of Software Reliability and Theoretical Computer Science

    PD Dr. Martin Stetter, Siemens AG 1 Neuronale Verfahren zur Regression Lineares Modell Vom: Optimierungsverfahren #12;PD Dr. Martin Stetter, Siemens AG 2 Optimierung konvexer Funktionen Hufiges Problem bei

  3. The Synthesis of Ag-Doped Mesoporous TiO2 . | EMSL

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

    TiO2 . The Synthesis of Ag-Doped Mesoporous TiO2 . Abstract: Ag-doped mesoporous titanium oxide was prepared using non-ionic surfactants and easily handled titanium...

  4. High-temperature internal oxidation of Ag/1.2at.% Mg and Ag/0.25at.% Mg-0.25at.% Ni.

    SciTech Connect (OSTI)

    Balachandran, U.; Goretta, K. C.; McNallan, M. J.; Park, J.-H.; Prorok, B. C.

    1999-09-08T23:59:59.000Z

    High-temperature oxygen diffusion and internal oxidation in Ag, Ag/1.2 at.% Mg (Ag-Mg), and Ag/0.25 at.% Mg-0.25 at.% Ni (Ag-Mg-Ni) have been studied, mostly in air and 8% O{sub 2}, at 450-835 C. The focus of the studies was on thermogravimetric analysis, microhardness tests, and optical and electron microscopy observations of grain growth and its inhibition by oxidation. The internal oxidation of both alloys exhibited nearly identical activation energies (0.81 eV for Ag-Mg and 0.83 eV for Ag-Mg-Ni) and rate constants. The maximum O content of both alloys was superstoichiometric (e.g., O/Mg > 1.0) and the maximum O/Mg ratios were higher at lower temperatures than at higher temperatures (e.g., 1.25 at 500 C and 1.05 at 800 C). Diffusion of O in pure Ag was {approx}60 times faster at 825 C and {approx}400 times faster at 500 C than internal oxidation of either of the Ag alloys. Grain growth of both alloys and of the Ag was quantified between 450-800 C and related to internal oxidation.

  5. Runtime System for I/O Staging in Support of In-Situ Processing of Extreme Scale Data

    SciTech Connect (OSTI)

    Schwan, Karsten [Georgia Institute of Technology

    2013-11-01T23:59:59.000Z

    Our research in this project focused on creating and evaluating an I/O infrastructure and tools for extreme-scale applications and machines so that scientists can reduce their time to discovery at small cost in machine resources and consequent power consumption. We wanted to provide tools that are highly scalable, portable, and easy-to-use, so that scientists can gain control of their science, and concentrate on producing important scientific discovery in their own domain. Accelerating the rate of insight and scientific productivity, therefore, demands new solutions to managing the avalanche of data expected at extreme scale.

  6. Characterization of the antiferromagnetism in Ag(pyz)2(S2O8) with a two-dimensional square lattice of Ag 2+ ions (Ag=silver, Pyz-pyrdzine, S2O8=sulfate)

    SciTech Connect (OSTI)

    Singleton, John [Los Alamos National Laboratory; Mc Donald, R [Los Alamos National Laboratory; Sengupta, P [Los Alamos National Laboratory; Cox, S [Los Alamos National Laboratory; Manson, J [E WASHINGTON U; Southerland, H [E WASHINGTON U; Warter, M [E WASHINGTON U; Stone, K [STATE UNIV OF NY; Stephens, P [STATE UNIV OF NY; Lancaster, T [OXFORD U; Steele, A [OXFORD U; Blundell, S [OXFORD U; Baker, P [OXFORD U; Pratt, F [RUTHERFORD-APPLETON LAB; Lee, C [NCSU; Whangbo, M [NCSU

    2009-01-01T23:59:59.000Z

    X-ray powder diffraction and magnetic susceptibility measurements show that Ag(pyz){sub 2}(S{sub 2}O{sub 8}) consists of 2D square nets of Ag{sup 2+} ions resulting from the corner-sharing of axially elongated AgN{sub 4}O{sub 2} octahedra and exhibits characteristic 2D antiferromagnetism. Nevertheless, {mu}{sup +}Sr measurements indicate that Ag(pyz){sub 2}(S{sub 2}O{sub 8}) undergoes 3D magnetic ordering below 7.8(3) K.

  7. Beam Energy Evolution of HBT Systematics at the AGS

    E-Print Network [OSTI]

    M. A. Lisa; E895 Collaboration

    2000-02-13T23:59:59.000Z

    We present preliminary results of the first pion interferometry (HBT) excitation function at intermediate AGS energies. The beam energy evolution of the correlations' dependence on mT, centrality, and emission angle with respect to the reaction plane are discussed. Comparisons with predictions of the RQMD cascade model are made.

  8. Acceleration of heavy ions in the AGS and CBA

    SciTech Connect (OSTI)

    Barton, M.Q.

    1983-01-01T23:59:59.000Z

    A plan has been developed to inject ion beams from the Brookhaven Tandem or a cyclotron added to the Tandem into the AGS. This beam could then be injected into a relativistic heavy ion collider. The availability of many CBA components adds to the attractiveness of this proposal.

  9. Outcomes/Impacts Our Ag Agent established a monitoring system

    E-Print Network [OSTI]

    Florida, University of

    Outcomes/Impacts Our Ag Agent established a monitoring system and educational outreach to area farms to track and manage an emerging insect threat to county berry crops. As a result of County preservation, nutrition and wellness as well as energy and housing and specific programs to meet the needs

  10. ImpactsofLarge Dams:agLobaL

    E-Print Network [OSTI]

    Chaudhuri, Sanjay

    #12;ImpactsofLarge Dams:agLobaL assessment Editors Cecilia Tortajada, Dogan Altinbilek, Asit K of the most controversial issues of the water sector in recent years has been the impacts of large dams and environmental costs of large dams far exceed their benefits, and that the era of construction of large dams

  11. AGS Experiment E951 An R&D Program for Targetry and Capture

    E-Print Network [OSTI]

    McDonald, Kirk

    a Argonne National Laboratory, Argonne, IL 60439 b Brookhaven National Laboratory, Upton, NY 11973 c CERN CERN LANSCE Collider AGS Booster PS PSR Proton Energy (GeV) 1624 24 8 24 0.8 p/bunch 5 \\Theta 10 13 1951 ffl Proposal P951 submitted to BNL AGS Division Sept. 1998. ffl Presented to the AGS/RHIC PAC

  12. PD Dr. Martin Stetter, Siemens AG 1 Statistische und neuronale Lernverfahren

    E-Print Network [OSTI]

    Popeea, Corneliu - Chair for Foundations of Software Reliability and Theoretical Computer Science

    PD Dr. Martin Stetter, Siemens AG 1 Statistische und neuronale Lernverfahren Martin Stetter SS 2003, Siemens AG 2 Behandelte Themen 0. ,,Motivation": Lernen in Statistik und Biologie 1-Regression 4. Bayes-Belief-Netze Statistische und neuronale Lernverfahren #12;PD Dr. Martin Stetter, Siemens AG

  13. PD Dr. Martin Stetter, Siemens AG 1 Neuronale Lernverfahren fr Klassifikation

    E-Print Network [OSTI]

    Popeea, Corneliu - Chair for Foundations of Software Reliability and Theoretical Computer Science

    PD Dr. Martin Stetter, Siemens AG 1 Neuronale Lernverfahren fr Klassifikation Das Perceptron #12;PD Dr. Martin Stetter, Siemens AG 2 Das Perceptron Klassifikation: Perceptron Neuronale Struktur- Klassifikationsfehler 1x w )(m x 1)( =m y 0^ =y 1^ +=y 2x #12;PD Dr. Martin Stetter, Siemens AG 3Klassifikation

  14. PD Dr. Martin Stetter, Siemens AG 1 Lernen von Datenmodellen: Fehlerminimierung und Regularisierung

    E-Print Network [OSTI]

    Popeea, Corneliu - Chair for Foundations of Software Reliability and Theoretical Computer Science

    PD Dr. Martin Stetter, Siemens AG 1 Lernen von Datenmodellen: Fehlerminimierung und Regularisierung: Fehlerminimierung #12;PD Dr. Martin Stetter, Siemens AG 2 Maximum-Likelihood und Fehlerminimierung Likelihood: Fehlerfunktionen #12;PD Dr. Martin Stetter, Siemens AG 3 Def. Fehlerfunktion: 0))|(,,( wxfyxl yxyyx ,0),,( =lmit

  15. Siemens AG, CT IC 4, H.-G. Zimmermann1 CORPORATETECHNOLOGY

    E-Print Network [OSTI]

    Schmidhuber, Juergen

    Siemens AG, CT IC 4, H.-G. Zimmermann1 CORPORATETECHNOLOGY System Identification & Forecasting with Advanced Neural Networks Principles, Techniques, Applications Hans Georg Zimmermann Siemens AG Email : Hans_Georg.Zimmermann@siemens.com Siemens AG, CT IC 4, H.-G. Zimmermann2 CORPORATETECHNOLOGY . . . . ! " i ii wxw 0 w1 wn xn x1 Distinct

  16. PD Dr. Martin Stetter, Siemens AG 1 Lernen von Datenmodellen: Approximation

    E-Print Network [OSTI]

    Popeea, Corneliu - Chair for Foundations of Software Reliability and Theoretical Computer Science

    PD Dr. Martin Stetter, Siemens AG 1 Lernen von Datenmodellen: Approximation Bayes`sches Schlieen: Approximation #12;PD Dr. Martin Stetter, Siemens AG 2 Ziel maschinellen Lernens (=statistische Inferenz) Man Datenmodellen: Approximation #12;PD Dr. Martin Stetter, Siemens AG 3 Bayes`sches Schlieen Es gilt, die Daten

  17. PD Dr. Martin Stetter, Siemens AG 1 Statistische und neuronale Lernverfahren

    E-Print Network [OSTI]

    Popeea, Corneliu - Chair for Foundations of Software Reliability and Theoretical Computer Science

    PD Dr. Martin Stetter, Siemens AG 1 Statistische und neuronale Lernverfahren Martin Stetter WS 03, Siemens AG 2 Behandelte Themen 0. ,,Motivation": Lernen in Statistik und Biologie 1-Regression 4. Bayes-Belief-Netze Statistische und neuronale Lernverfahren #12;PD Dr. Martin Stetter, Siemens AG

  18. PD Dr. Martin Stetter, Siemens AG 1 Neuronale Verfahren zur Regression

    E-Print Network [OSTI]

    Popeea, Corneliu - Chair for Foundations of Software Reliability and Theoretical Computer Science

    PD Dr. Martin Stetter, Siemens AG 1 Neuronale Verfahren zur Regression Lineares Modell Vom-Netze Regression #12;PD Dr. Martin Stetter, Siemens AG 2 Das lineare Modell Ausgangspunkt: Lineares Perceptron vorgegeben, werden nicht gelernt #12;PD Dr. Martin Stetter, Siemens AG 3 Geschrieben als Regressionsmodell

  19. Pd and Ag metal-silicate partitioning applied to Earth differentiation and core-mantle exchange

    E-Print Network [OSTI]

    Mcdonough, William F.

    Pd and Ag metal-silicate partitioning applied to Earth differentiation and core-mantle exchange metallic sulfide and liquid silicate under plausible magma ocean conditions constrains potential core 107 Ag content and the origin of observed Pd and Ag mantle abundances. DPd metallic sulfide / silicate

  20. Influence des endiguements et remblais sur l'inondation de la plaine de l'Agly

    E-Print Network [OSTI]

    Boyer, Edmond

    Influence des endiguements et remblais sur l'inondation de la plaine de l'Agly The influence of dikes and embankments on the Agly plain floods par A. Paquier Cemagref Building ofdikes along downstream reach ofAgly River has protected the low plain /rom the more frequent floods, wlùch encourages

  1. Superconducting and magnetic properties of Sr?Ir?Sn??

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

    Biswas, P. K.; Wang, Kefeng; Amato, A.; Khasanov, R.; Luetkens, H.; Petrovic, C.; Cook, R. M.; Lees, M. R.; Morenzoni, E.

    2014-10-01T23:59:59.000Z

    Magnetization and muon spin relaxation or rotation (SR) measurements have been performed to study the superconducting and magnetic properties of Sr?Ir?Sn??. From magnetization measurements the lower and upper critical fields of Sr?Ir?Sn?? are found to be 81(1) Oe and 14.4(2) kOe, respectively. Zero-field SR data show no sign of any magnetic ordering or weak magnetism in Sr?Ir?Sn??. Transverse-field SR measurements in the vortex state provided the temperature dependence of the magnetic penetration depth ?. The dependence of ?? with temperature is consistent with the existence of single s-wave energy gap in the superconducting state of Sr?Ir?Sn?? with a gap valuemoreof 0.82(2) meV at absolute zero temperature. The magnetic penetration depth at zero temperature ?(0) is 291(3) nm. The ratio ?(0)/kBTc = 2.1(1) indicates that Sr?Ir?Sn?? should be considered as a strong-coupling superconductor.less

  2. Superconducting and magnetic properties of Sr?Ir?Sn??

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

    Biswas, P. K. [Paul Scherrer Inst. (PSI), Villigen (Switzerland); Wang, Kefeng [Brookhaven National Lab. (BNL), Upton, NY (United States); Amato, A. [Paul Scherrer Inst. (PSI), Villigen (Switzerland); Khasanov, R. [Paul Scherrer Inst. (PSI), Villigen (Switzerland); Luetkens, H. [Paul Scherrer Inst. (PSI), Villigen (Switzerland); Petrovic, C. [Brookhaven National Lab. (BNL), Upton, NY (United States); Cook, R. M. [Univ. of Warwick, Coventry (United Kingdom); Lees, M. R. [Univ. of Warwick, Coventry (United Kingdom); Morenzoni, E. [Paul Scherrer Inst. (PSI), Villigen (Switzerland)

    2014-10-01T23:59:59.000Z

    Magnetization and muon spin relaxation or rotation (SR) measurements have been performed to study the superconducting and magnetic properties of Sr?Ir?Sn??. From magnetization measurements the lower and upper critical fields of Sr?Ir?Sn?? are found to be 81(1) Oe and 14.4(2) kOe, respectively. Zero-field SR data show no sign of any magnetic ordering or weak magnetism in Sr?Ir?Sn??. Transverse-field SR measurements in the vortex state provided the temperature dependence of the magnetic penetration depth ?. The dependence of ?? with temperature is consistent with the existence of single s-wave energy gap in the superconducting state of Sr?Ir?Sn?? with a gap value of 0.82(2) meV at absolute zero temperature. The magnetic penetration depth at zero temperature ?(0) is 291(3) nm. The ratio ?(0)/kBTc = 2.1(1) indicates that Sr?Ir?Sn?? should be considered as a strong-coupling superconductor.

  3. The Michigan Recreational Angler Survey Tracking status and trends of Michiga ir resource use ir resource use n's anglers and the

    E-Print Network [OSTI]

    The Michigan Recreational Angler Survey Tracking status and trends of Michiga ir resource use ir of angling effort for all of Michigan's fisheries Method Monthly, statewide mail survey of Michigan's licensed anglers Priority Outcomes & Management Applications glers s Baseline

  4. Low Dose IR Creates an Oncogenic Microenvironment by Inducing Premature

    SciTech Connect (OSTI)

    Yuan, Zhi-Min [Harvard School of Public Health

    2013-04-28T23:59:59.000Z

    Introduction Much of the work addressing ionizing radiation-induced cellular response has been carried out mainly with the traditional cell culture technique involving only one cell type, how cellular response to IR is influenced by the tissue microenvironment remains elusive. By use of a three-dimensional (3D) co-culture system to model critical interactions of different cell types with their neighbors and with their environment, we recently showed that low-dose IR-induced extracellular signaling via the tissue environment affects profoundly cellular responses. This proposal aims at determining the response of mammary epithelial cells in a tissue-like setting.

  5. Characterization and device performance of (AgCu)(InGa)Se2 absorber layers

    SciTech Connect (OSTI)

    Hanket, Gregory; Boyle, Jonathan H.; Shafarman, William N.

    2009-06-08T23:59:59.000Z

    The study of (AgCu)(InGa)Se2 absorber layers is of interest in that Ag-chalcopyrites exhibit both wider bandgaps and lower melting points than their Cu counterparts. (AgCu)(InGa)Se2 absorber layers were deposited over the composition range 0 < Ag/(Ag+Cu) < 1 and 0.3 < Ga/(In+Ga) < 1.0 using a variety of elemental co-evaporation processes. Films were found to be singlephase over the entire composition range, in contrast to prior studies. Devices with Ga content 0.3 < Ga/(In+Ga) <0.5 tolerated Ag incorporation up to Ag/(Ag+Cu) = 0.5 without appreciable performance loss. Ag-containing films with Ga/(In+Ga) = 0.8 showed improved device characteristics over Cu-only control samples, in particular a 30-40% increase in short-circuit current. An absorber layer with composition Ag/(Ag+Cu) = 0.75 and Ga/(In+Ga) = 0.8 yielded a device with VOC = 890 mV, JSC = 20.5mA/cm2, fill factor = 71.3%, and ? = 13.0%.

  6. Determine Minimum Silver Flake Addition to GCM for Iodine Loaded AgZ

    SciTech Connect (OSTI)

    Garino, Terry J.; Nenoff, Tina M.; Rodriguez, Mark A.

    2014-04-01T23:59:59.000Z

    The minimum amount of silver flake required to prevent loss of I{sub 2} during sintering in air for a SNL Glass Composite Material (GCM) Waste Form containing AgI-MOR (ORNL, 8.7 wt%) was determined to be 1.1 wt% Ag. The final GCM composition prior to sintering was 20 wt% AgI-MOR, 1.1 wt% Ag, and 80 wt% Bi-Si oxide glass. The amount of silver flake needed to suppress iodine loss was determined using thermo gravimetric analysis with mass spectroscopic off-gas analysis. These studies found that the ratio of silver to AgI-MOR required is lower in the presence of the glass than without it. Therefore an additional benefit of the GCM is that it serves to inhibit some iodine loss during processing. Alternatively, heating the AgI-MOR in inert atmosphere instead of air allowed for densified GCM formation without I{sub 2} loss, and no necessity for the addition of Ag. The cause of this behavior is found to be related to the oxidation of the metallic Ag to Ag{sup +} when heated to above ~300{degrees}C in air. Heating rate, iodine loading levels and atmosphere are the important variables that determine AgI migration and results suggest that AgI may be completely incorporated into the mordenite structure by the 550{degrees}C sintering temperature.

  7. Scientific Coordination Prof. dr. ir. Michel De Paepe

    E-Print Network [OSTI]

    govern- ments) in order to reduce CO2 emissions and the use of fossil fuels. Ten years later we seeScientific Coordination Prof. dr. ir. Michel De Paepe Department of Flow, heat and combustion that fuel prices have doubled and energy saving has reached a point of economic importance in the whole span

  8. UV/IR duality in noncommutative quantum field theory

    E-Print Network [OSTI]

    Andre Fischer; Richard J. Szabo

    2010-06-16T23:59:59.000Z

    We review the construction of renormalizable noncommutative euclidean phi(4)-theories based on the UV/IR duality covariant modification of the standard field theory, and how the formalism can be extended to scalar field theories defined on noncommutative Minkowski space.

  9. Injection and acceleration of Au31+ in the BNL AGS.

    SciTech Connect (OSTI)

    Fischer,W.; Ahrens, L.; Brown, K.; Gardner, C.; Glenn, W.; Huang, H.; Mapes, M.; Smart, L.; Thieberger, P.; Tsoupas, N.; Zhang, S.Y.; Zeno, K.; Omet, C.; Spiller, P.

    2008-06-23T23:59:59.000Z

    Injection and acceleration of ions in a lower charge state reduces space charge effects, and, if further elcctron stripping is needed, may allow elimination of a stripping stage and the associated beam losses. The former is of interest to the accelerators in the GSI FAIR complex, the latter for BNL RHIC collider operation at energies lower than the current injection energy. Lower charge state ions, however, have a higher likelihood of electron stripping which can lead to dynamic pressures rises and subsequent beam losses. We report on experiments in the AGS where Au{sup 31+} ions were injected and accelerated instead of the normally used Au{sup 77+} ions. Beam intensities and the average pressure in the AGS ring are recorded, and compared with calculations for dynamic pressures and beam losses. The experimental results will be used to benchmark the StrahlSim dynamic vacuum code and will be incorporated in the GSI FAIR SIS100 design.

  10. Acceleration of polarized protons in the Brookhaven AGS

    SciTech Connect (OSTI)

    Terwilliger, K.M.; Crabb, D.G.; Krisch, A.D.

    1981-01-01T23:59:59.000Z

    A multi-laboratory-university collaborative project involving Argonne, Brookhaven, Michigan, Rice and Yale is underway to accelerate polarized protons at the AGS. The success of the now turned off 12 GeV/c ZGS polarized beam and the design studies for the AGS made us confident of the feasibility of achieving a polarization of about 60% at 26 GeV/c with an intensity 10/sup 11/ to 10/sup 12/ protons/pulse. Such a beam would be a potential source of polarized protons for ISABELLE. This report gives a brief discussion of the overall project and describes the tests of a prototype of the fast pulsed ferrite quadrupole magnets which will jump the intrinsic depolarizing resonances.

  11. A new architecture as transparent electrodes for solar and IR applications based on photonic structures via soft lithography

    SciTech Connect (OSTI)

    Kuang, Ping

    2011-05-15T23:59:59.000Z

    Transparent conducting electrodes with the combination of high optical transmission and good electrical conductivity are essential for solar energy harvesting and electric lighting devices. Currently, indium tin oxide (ITO) is used because ITO offers relatively high transparency (>80%) to visible light and low sheet resistance (R{sub s} = 10 ohms/square ({Omega}#2;/?)) for electrical conduction. However, ITO is costly due to limited indium reserves, and it is brittle. These disadvantages have motivated the search for other conducting electrodes with similar or better properties. There has been research on a variety of electrode structures involving carbon nanotube networks, graphene films, nanowire and nanopatterned meshes and grids. Due to their novel characteristics in light manipulation and collection, photonic crystal structures show promise for further improvement. Here, we report on a new architecture consisting of nanoscale high aspect ratio metallic photonic structures as transparent electrodes fabricated via a combination of processes. For (Au) and silver (Ag) structures, the visible light transmission can reach as high as 80%, and the sheet resistance of the structure can be as low as 3.2{Omega}#2;/?. The optical transparency of the high aspect ratio metal structures at visible wavelength range is comparable to that of ITO glass, while their sheet resistance is more than 3 times lower, which indicates a much higher electrical conductivity of the metal structures. Furthermore, the high aspect ratio metal structures have very high infrared (IR) reflection (90%) for the transverse magnetic (TM) mode, which can lead to the development of fabrication of metallic structures as IR filters for heat control applications. Investigations of interdigitated structures based on the high aspect ratio metal electrodes are ongoing to study the feasibility in smart window applications in light transmission modulation.

  12. IoT Design Space Challenges: Circuits and Systems D. Blaauw, D. Sylvester, P. Dutta, Y. Lee, I. Lee, S. Bang, Y. Kim, G. Kim, P. Pannuto,

    E-Print Network [OSTI]

    Dutta, Prabal

    T) is a rapidly emerging application space, poised to become the largest electronics market for the semiconductor was previously absent. As a result, IoT presents the semiconductor industry with a market opportunity that may, extremely long lifetime HVAC sensors, to sensors for oil reservoir diagnosis [1]. To categorize this wide

  13. Decoupled PID Controller Synthesis for MIMO Plants with I/O Delays A. N. Mete, A. N. Gundes and H. Ozbay

    E-Print Network [OSTI]

    Gundes, A. N.

    Decoupled PID Controller Synthesis for MIMO Plants with I/O Delays A. N. Mete, A. N. G¨undes¸ and H. ¨Ozbay Abstract-- Decentralized Proportional+Integral+Derivative (PID) controller synthesis methods controller is turned-off and taken out of service. I. INTRODUCTION Proportional+Integral+Derivative (PID

  14. Spivack, Richard. "Advanced Technology Program Information Infrastructure for Healthcare Focused Program" The Future of Health Technology. ed. Renata Bushko. IOS Press, 2002.

    E-Print Network [OSTI]

    ) at the National Institute of Standards and Technology (NIST) is a cost-sharing program designed to partnerSpivack, Richard. "Advanced Technology Program Information Infrastructure for Healthcare Focused Program" The Future of Health Technology. ed. Renata Bushko. IOS Press, 2002. Advanced Technology Program

  15. Morphological and electrochemical characterization of electrodeposited ZnAg nanoparticle composite coatings

    SciTech Connect (OSTI)

    Punith Kumar, M.K.; Srivastava, Chandan, E-mail: csrivastava@materials.iisc.ernet.in

    2013-11-15T23:59:59.000Z

    Silver nanoparticles with an average size of 23 nm were chemically synthesized and used to fabricate ZnAg composite coatings. The ZnAg composite coatings were generated by electrodeposition method using a simple sulfate plating bath dispersed with 0.5, 1 and 1.5 g/l of Ag nanoparticles. Scanning electron microscopy, X-ray diffraction and texture co-efficient calculations revealed that Ag nanoparticles appreciably influenced the morphology, micro-structure and texture of the deposit. It was also noticed that agglomerates of Ag nanoparticles, in the case of high bath load conditions, produced defects and dislocations on the deposit surface. Ag nanoparticles altered the corrosion resistance property of ZnAg composite coatings as observed from Tafel polarization, electrochemical impedance analysis and an immersion test. Reduction in corrosion rate with increased charge transfer resistance was observed for ZnAg composite coatings when compared to a pure Zn coating. However, the particle concentration in the plating bath and their agglomeration state directly influenced the surface morphology and the subsequent corrosion behavior of the deposits. - Highlights: Synthesis of Ag nanoparticles with an average size of 23 nm Fabrication of Zn/nano Ag composite coating on mild steel Composite coatings showed better corrosion resistance. Optimization of particle concentration is necessary.

  16. Investigation of microstructure, surface morphology, and hardness properties of PtIr films by magnetron sputtering

    SciTech Connect (OSTI)

    Lee, Chao-Te; Liu, Bo-Heng; Chang, Chun-Ming; Lin, Yu-Wei [Instrument Technology Research Center, National Applied Research Laboratories, Hsinchu 300, Taiwan (China)

    2010-09-15T23:59:59.000Z

    Pt{sub 1-x}Ir{sub x} films with x varying from 22.76 to 63.25 at. % are deposited on (100) Si wafer substrates at 400 deg. C by magnetron sputtering deposition. The effects of the Ir concentration on the microstructure, morphology, and hardness of PtIr films are investigated by field emission scanning electron microscopy, x-ray diffraction, atomic force microscopy, and nanoindentation system. The columnar structures are observed by field emission scanning electron microscopy. X-ray diffraction analysis reveals that PtIr films have preferred orientation along Pt(111) when the Ir concentration is below 50.84 at. %. When the Ir content is more than 50.84 at. %, the PtIr film shifts to another preferred orientation, Ir(111). The surface morphology is analyzed by atomic force microscopy. The roughness of the PtIr films decreases with increasing Ir content. The hardness of all the PtIr films is below 20 GPa. The maximum hardness of the PtIr films is about 14.9 GPa when the Ir concentration is 57.9 at. %.

  17. A COMPARATIVE ASTROCHEMICAL STUDY OF THE HIGH-MASS PROTOSTELLAR OBJECTS NGC 7538 IRS 9 AND IRS 1

    SciTech Connect (OSTI)

    Barentine, John C.; Lacy, John H. [Department of Astronomy, University of Texas at Austin, 1 University Station, C1400, Austin, TX 78712-0259 (United States)

    2012-10-01T23:59:59.000Z

    We report the results of a spectroscopic study of the high-mass protostellar object NGC 7538 IRS 9 and compare our observations to published data on the nearby object NGC 7538 IRS 1. Both objects originated in the same molecular cloud and appear to be at different points in their evolutionary histories, offering an unusual opportunity to study the temporal evolution of envelope chemistry in objects sharing a presumably identical starting composition. Observations were made with the Texas Echelon Cross Echelle Spectrograph, a sensitive, high spectral resolution (R {lambda}/{Delta}{lambda} {approx_equal} 100,000) mid-infrared grating spectrometer. Forty-six individual lines in vibrational modes of the molecules C{sub 2}H{sub 2}, CH{sub 4}, HCN, NH{sub 3}, and CO were detected, including two isotopologues ({sup 13}CO, {sup 12}C{sup 18}O) and one combination mode ({nu}{sub 4} + {nu}{sub 5} C{sub 2}H{sub 2}). Fitting synthetic spectra to the data yielded the Doppler shift, excitation temperature, Doppler b parameter, column density, and covering factor for each molecule observed; we also computed column density upper limits for lines and species not detected, such as HNCO and OCS. We find differences among spectra of the two objects likely attributable to their differing radiation and thermal environments. Temperatures and column densities for the two objects are generally consistent, while the larger line widths toward IRS 9 result in less saturated lines than those toward IRS 1. Finally, we compute an upper limit on the size of the continuum-emitting region ({approx}2000 AU) and use this constraint and our spectroscopy results to construct a schematic model of IRS 9.

  18. SESAM FT-IR: A Comparison of the R&D Workhorse to Standard Emission...

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

    SESAM FT-IR: A Comparison of the R&D Workhorse to Standard Emission Benches SESAM FT-IR: A Comparison of the R&D Workhorse to Standard Emission Benches Data for a number of...

  19. Novel Techniques for Single-Pulse Spectrum and Pulsewidth Measurements for an IR-FEL

    E-Print Network [OSTI]

    Leemans, W.P.

    2011-01-01T23:59:59.000Z

    ofthe LBL/Stanford diagnostics. FEL Thespectral andtemporalMeasurements for an IR-FEL W.P. Leemans, J.A. Edighoffer, K-Measurements for an IR-FEL* W. P. Leemans, J. A. Edighoffer,

  20. The Role of Ir in Ternary Rh-Based Catalysts for Syngas Conversion...

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

    The Role of Ir in Ternary Rh-Based Catalysts for Syngas Conversion to C2+ Oxygenates. The Role of Ir in Ternary Rh-Based Catalysts for Syngas Conversion to C2+ Oxygenates....

  1. Transparent Conducting Electrodes based on 1D and 2D Ag Nanogratings for Organic Photovoltaics

    E-Print Network [OSTI]

    Zeng, Beibei; Bartoli, Filbert J

    2014-01-01T23:59:59.000Z

    The optical and electrical properties of optically-thin one-dimensional (1D) Ag nanogratings and two-dimensional (2D) Ag nanogrids are studied, and their use as transparent electrodes in organic photovoltaics are explored. A large broadband and polarization-insensitive optical absorption enhancement in the organic light-harvesting layers is theoretically and numerically demonstrated using either single-layer 2D Ag nanogrids or two perpendicular 1D Ag nanogratings, and is attributed to the excitation of surface plasmon resonances and plasmonic cavity modes. Total photon absorption enhancements of 150% and 200% are achieved for the optimized single-layer 2D Ag nanogrids and double (top and bottom) perpendicular 1D Ag nanogratings, respectively.

  2. IR OPTICS MEASUREMENT WITH LINEAR COUPLING'S ACTION-ANGLE PARAMETERIZATION.

    SciTech Connect (OSTI)

    LUO, Y.; BAI, M.; PILAT, R.; SATOGATA, T.; TRBOJEVIC, D.

    2005-05-16T23:59:59.000Z

    A parameterization of linear coupling in action-angle coordinates is convenient for analytical calculations and interpretation of turn-by-turn (TBT) beam position monitor (BPM) data. We demonstrate how to use this parameterization to extract the twiss and coupling parameters in interaction regions (IRs), using BPMs on each side of the long IR drift region. The example of TBT BPM analysis was acquired at the Relativistic Heavy Ion Collider (RHIC), using an AC dipole to excite a single eigenmode. Besides the full treatment, a fast estimate of beta*, the beta function at the interaction point (IP), is provided, along with the phase advance between these BPMs. We also calculate and measure the waist of the beta function and the local optics.

  3. THERMAL FLUID MODELING OF BEPCII IR QUADRUPOLE MAGNET CRYOSTAT.

    SciTech Connect (OSTI)

    WANG.L.; TANG,H.M.; ZHANG,X.B.; YANG,G.D.; JIA,L.X.

    2004-05-11T23:59:59.000Z

    A pair of superconducting interaction region quadrupole magnets for BEPCII was designed and fabricated at Brookhaven National Laboratory, USA. The cryogenic system for the IR magnets was designed at Harbin Institute of Technology, China. This paper provides the results of thermal fluid modeling for the magnet cryostat. The numerical analyses were carried out for two types of cooling methods, the subcooled liquid helium and the supercritical helium flow. The pressure and temperature changes in the cooling circuits are given.

  4. Corrosion behavior of newly developed TiAgFe dental alloys in neutral saline solution

    E-Print Network [OSTI]

    Zheng, Yufeng

    Corrosion behavior of newly developed Ti­Ag­Fe dental alloys in neutral saline solution B. B. Zhang, B. L. Wang, L. Li and Y. F. Zheng* The corrosion behavior of Ti­5Ag­xFe alloys (x ¼ 1, 2.5, 5 wt) Ti,Ti­ 5Ag­xFe alloys exhibited higher corrosion potentials, lower current densities, and larger

  5. Rational production of veneer by IR-heating of green wood during peeling: Modeling experiments

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    (0)3 85 59 53 85 E-mail: anna.dupleix@ensam.eu Abstract Heating green wood logs by infrared (IR-line IR heating system installed on the peeling lathe. Keywords: green wood; heating; infrared; modelingRational production of veneer by IR-heating of green wood during peeling: Modeling experiments Anna

  6. Uncooled thin film pyroelectric IR detector with aerogel thermal isolation

    SciTech Connect (OSTI)

    Ruffner, J.A.; Clem, P.G.; Tuttle, B.A. [and others

    1998-01-01T23:59:59.000Z

    Uncooled pyroelectric IR imaging systems, such as night vision goggles, offer important strategic advantages in battlefield scenarios and reconnaissance surveys. Until now, the current technology for fabricating these devices has been limited by low throughput and high cost which ultimately limit the availability of these sensor devices. We have developed and fabricated an alternative design for pyroelectric IR imaging sensors that utilizes a multilayered thin film deposition scheme to create a monolithic thin film imaging element on an active silicon substrate for the first time. This approach combines a thin film pyroelectric imaging element with a thermally insulating SiO{sub 2} aerogel thin film to produce a new type of uncooled IR sensor that offers significantly higher thermal, spatial, and temporal resolutions at a substantially lower cost per unit. This report describes the deposition, characterization and optimization of the aerogel thermal isolation layer and an appropriate pyroelectric imaging element. It also describes the overall integration of these components along with the appropriate planarization, etch stop, adhesion, electrode, and blacking agent thin film layers into a monolithic structure. 19 refs., 8 figs., 6 tabs.

  7. UV/IR mode mixing and the CMB

    SciTech Connect (OSTI)

    Palma, Gonzalo A. [Instituut-Lorentz for Theoretical Physics, Universiteit Leiden, NL-2300 RA Leiden (Netherlands); Physics Department, FCFM, Universidad de Chile, Blanco Encalada 2008, Santiago (Chile); Patil, Subodh P. [Humboldt Universitaet zu Berlin, Institut fuer Physik, Newtonstrasse 15, D-12489 Berlin (Germany)

    2009-10-15T23:59:59.000Z

    It is well understood that spatial noncommutativity, if indeed realized in nature, is a phenomenon whose effects are not just felt at energy scales comparable to the noncommutativity scale. Loop effects can transmit signatures of any underlying noncommutativity to macroscopic scales (a manifestation of a phenomenon that has come to be known as UV/IR mode mixing) and offer a potential lever to constrain the amount of noncommutativity present in nature, if present at all. Field theories defined on noncommutative spaces (realized in string theory when D-branes are coupled to backgrounds of nontrivial RR background flux), can exhibit strong UV/IR mode mixing, manifesting in a nonlocal one-loop effective action. In the context of inflation in the presence of any background noncommutativity, we demonstrate how this UV/IR mixing at the loop level can allow us to place severe constraints on the scale of noncommutativity if we presume inflation is responsible for large-scale structure. We demonstrate that any amount of noncommutativity greatly suppresses the cosmic microwave background power at all observable scales, independent of the scale of inflation, and independent of whether or not the noncommutativity tensor redshifts during inflation, therefore nullifying a very salient and successful prediction of inflation.

  8. Surface-supported Ag islands stabilized by a quantum size effect: Their interaction with small molecules relevant to ethylene epoxidation

    SciTech Connect (OSTI)

    Shao, Dahai

    2013-05-15T23:59:59.000Z

    This dissertation focuses on how QSE-stabilized, surface-supported Ag nanoclusters will interact with ethylene or oxygen. Experiments are performed to determine whether the QSE-mediated Ag islands react differently toward adsorption of ethylene or oxygen, or whether the adsorption of these small molecules will affect the QSE-mediated stability of Ag islands. Studies of the interaction of oxygen with Ag/Si(111)-77 were previously reported, but these studies were performed at a low Ag coverage where 3D Ag islands were not formed. So the study of such a system at a higher Ag coverage will be a subject of this work. The interaction of ethylene with Ag/Si(111)-77, as well as the interaction of oxygen with Ag/NiAl(110) are also important parts of this study.

  9. ag 50wx2 nafion-h: Topics by E-print Network

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

    of this phenomenon have concentrated on ion Nordlund, Kai 104 Panasonic Electric Works Europe AG panasonic-electric-works.com CCELERATIONSENSORS,IGHTSENSORS0RESSURESENSORS)NFOR...

  10. Potential-field geophysical programs for VAX 7xx computers; source code (programs A-G)

    SciTech Connect (OSTI)

    Not Available

    1989-01-01T23:59:59.000Z

    A U.S. Geological Survey report is presented giving the source code of potential-field geophysical programs (programs A-G) for VAX 7xx computers.

  11. AGS tune jump system to cross horizontal depolarization resonances overview

    SciTech Connect (OSTI)

    Glenn, J.W.; Ahrens, L.; Fu, W.; Mi, J.L.; Rosas, P.; Schoefer, V.; Theisen, C.; Altinbas, Z.

    2011-03-28T23:59:59.000Z

    Two partial snakes overcome the vertical depolarizing resonances in the AGS. But a new type of depolarizing intrinsic resonance from horizontal motion appeared. We reduce these using horizontal tune jumps timed to these resonances. We gain a factor of six in crossing rate with a tune jump of 0.05 in 100 {micro}s. Two quadrapoles, we described in 2009, pulse 42 times, the current matching beam energy. The power supplies for these quads are described in detail elsewhere in this conference. The controls for the Jump Quad system is based on a BNL designed Quad Function Generator. Two modules are used; one for timing, and one to supply reference voltages. Synchronization is provided by a proprietary serial bus, the Event Link. The AgsTuneJump application predicts the times of the resonances during the AGS cycle and calculates the power supply trigger times from externally collected tune and energy versus time data and the Low and High PS voltage functions from a voltage to current model of the power supply. The system was commissioned during runs 09 & 10 and is operational. Many beam effects are described elsewhere. The TuneJump system has worked well and has caused little trouble save for the perturbations in the lattice having such a large effect due to our need to run with the vertical tune within a few thousandths of the integer tune. As these problems were mostly sorted out by correcting the 6th harmonic orbit distortions which caused a large 18 theta beta wave. Also running with minimal chromaticity reduces emittance growth. There are still small beta waves which are being addressed. The timing of the pulses is still being investigated, but as each crossing causes minimal polarization loss, this is a lengthy process.

  12. Results from the E917 experiment at the AGS

    E-Print Network [OSTI]

    Birger B. Back; for the E917 collaboration

    1999-04-08T23:59:59.000Z

    Collisions of Au+Au have been studied at beam kinetic energies of 6, 8, and 10.8 GeV/nucleon at the AGS facility at Brookhaven National Laboratory. Particles emitted from the collisions were momentum analyzed and identified in a magnetic spectrometer system. Measurements were made at spectrometer angles in the range 14deg - 59deg. m_t spectra of protons from central collisions were analyzed to derive integrated rapidity distributions and inverse slope as a function of rapidity. The results are compared with a thermal model and it is concluded that there is either substantial transparency or longitudinal expansion at all three beam energies.

  13. On the high intensity aspects of AGS Booster proton operation

    SciTech Connect (OSTI)

    Reece, R.K.; Ahrens, L.A.; Bleser, E.J.; Brennan, J.M.; Gardner, C.; Glenn, J.W.; Roser, T.; Shoji, Y.; van Asselt, W.; Weng, W.T.

    1993-01-01T23:59:59.000Z

    Observations of high intensity effects on the proton performance of the AGS Booster are presented, including present operational limits and correction methods. The transverse emittances, optimum tune working points, damping of coherent transverse oscillations and correction of stopband resonances through third-order are discussed in addition to the observed tune spread due to space charge forces. The initial longitudinal phase space distribution, capture and acceleration parameters and measurements are also given. Operational tools and strategies relevant to the high intensity setup are mentioned.

  14. On the high intensity aspects of AGS Booster proton operation

    SciTech Connect (OSTI)

    Reece, R.K.; Ahrens, L.A.; Bleser, E.J.; Brennan, J.M.; Gardner, C.; Glenn, J.W.; Roser, T.; Shoji, Y.; van Asselt, W.; Weng, W.T.

    1993-06-01T23:59:59.000Z

    Observations of high intensity effects on the proton performance of the AGS Booster are presented, including present operational limits and correction methods. The transverse emittances, optimum tune working points, damping of coherent transverse oscillations and correction of stopband resonances through third-order are discussed in addition to the observed tune spread due to space charge forces. The initial longitudinal phase space distribution, capture and acceleration parameters and measurements are also given. Operational tools and strategies relevant to the high intensity setup are mentioned.

  15. AgFuture Energy LLC AFE | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTriWildcat 1AMEE JumpAeroWind Inc.Information AfluenteAg Fuels

  16. S R Biogas Energiesysteme AG | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty Edit with form HistoryRistma AG Jump to:Energy Information RwandaEnergyRyusekiSS

  17. SFC Smart Fuel Cell AG | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty Edit with form HistoryRistma AG Jump to:Energy InformationS WSERTRONIC JumpSFC

  18. Mepsolar AG aka Munich Energy Partners | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to: navigation, searchOfRose Bend <StevensMcClellan,II JumpMepsolar AG aka Munich Energy

  19. Otter Tail Ag Enterprises LLC | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual SiteofEvaluatingGroup |JilinLuOpenNorthOlympia GreenThesource HistoryOsramOtherOtter Tail Ag

  20. Mechanism of coercivity enhancement by Ag addition in FePt-C granular films for heat assisted magnetic recording media

    SciTech Connect (OSTI)

    Varaprasad, B. S. D. Ch. S.; Takahashi, Y. K., E-mail: takahashi.yukiko@nims.go.jp; Wang, J.; Hono, K. [National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba 305-0047 (Japan); Ina, T.; Nakamura, T.; Ueno, W.; Nitta, K.; Uruga, T. [Japan Synchrotron Radiation Research Institute (JASRI/SPring-8), 1-1-1 Kouto, Sayo, Hyogo 679-5198 (Japan)

    2014-06-02T23:59:59.000Z

    We investigated the Ag distribution in a FePtAg-C granular film that is under consideration for a heat assisted magnetic recording medium by aberration-corrected scanning transmission electron microscope-energy dispersive X-ray spectroscopy and X-ray absorption fine structure. Ag is rejected from the core of FePt grains during the deposition, forming Ag-enriched shell surrounding L1{sub 0}-ordered FePt grains. Since Ag has no solubility in both Fe and Pt, the rejection of Ag induces atomic diffusions thereby enhancing the kinetics of the L1{sub 0}-order in the FePt grains.

  1. SIMULATIONS OF THE AGS MMPS STORING ENERGY IN CAPACITOR BANKS

    SciTech Connect (OSTI)

    MARNERIS,I.; BADEA, V.S.; BONATI, R.; ROSER, T.; SANDBERG, J.

    2007-06-25T23:59:59.000Z

    The Brookhaven AGS Main Magnet Power Supply (MMPS) is a thyristor control supply rated at 5500 Amps, +/-9000 Volts. The peak magnet power is 50 MWatts. The power supply is fed from a motor/generator manufactured by Siemens. The generator is 3 phase 7500 Volts rated at 50 MVA. The peak power requirements come from the stored energy in the rotor of the motor/generator. The motor generator is about 45 years old, made by Siemens and it is not clear if companies will be manufacturing similar machines in the future. We are therefore investigating different ways of storing energy for future AGS MMPS operations. This paper will present simulations of a power supply where energy is stored in capacitor banks. Two dc to dc converters will be presented along with the control system of the power section. The switching elements will be IGCT's made by ABB. The simulation program used is called PSIM version 6.1. The average power from the local power authority into the power supply will be kept constant during the pulsing of the magnets at +/-50 MW. The reactive power will also be kept constant below 1.5 MVAR. Waveforms will be presented.

  2. Preparation and photocatalytic properties of AgISnO{sub 2} nano-composites

    SciTech Connect (OSTI)

    Wen, Biao; Wang, Xiao-Hui; Lu, Juan; Cao, Jia-Lei [College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215021 (China); Wang, Zuo-Shan, E-mail: zuoshanwang@suda.edu.cn [College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215021 (China); State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081 (China)

    2013-05-15T23:59:59.000Z

    Highlights: ? AgISnO{sub 2} nano-composites have been successfully synthesized. ? As-prepared AgISnO{sub 2} nano-composites own the excellent visible light photocatalytic activity. ? As-prepared AgISnO{sub 2} nano-composites own the excellent stability. - Abstract: AgI doped SnO{sub 2} nano-composites were prepared by the chemical coprecipitation method and were characterized by the X-ray diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy. Results showed that main of the I{sup ?} ions remained in the AgI lattice which is highly dispersed in the system. The photo-catalytic experiments performed under visible light irradiation using methylene blue as the pollutant revealed that not only the photo-catalytic activity but also the stability of SnO{sub 2} based photocatalyst could be improved by introduction of an appropriate amount of AgI, and the result was further supported by the UVVis diffuse reflection spectra and the electron spin-resonance spectra. Among all of the samples, AgISnO{sub 2} nano-composite with 2At% AgI exhibited the best catalytic efficiency and stability.

  3. AgExcellence 2006 The College of Agriculture and Montana Agricultural Experiment Station in Review

    E-Print Network [OSTI]

    Maxwell, Bruce D.

    AgExcellence 2006 The College of Agriculture and Montana Agricultural Experiment Station in Review #12;ACAdEMiC pRogRAMS College of Agriculture Baccalaureate: Agricultural Education Options: AgRelations Teaching Agricultural Operations Technology MasterofScience: Agricultural Education Baccalaureate

  4. AGS Experiment E951 An R&D Program for Targetry and Capture

    E-Print Network [OSTI]

    McDonald, Kirk

    a Argonne National Laboratory, Argonne, IL 60439 b Brookhaven National Laboratory, Upton, NY 11973 c LANSCE Collider AGS Booster PS PSR Proton Energy (GeV) 16-24 24 8 24 0.8 p/bunch 5 1013 1.6 1013 6. Presented to the AGS/RHIC PAC on May 25, 1999: "The PAC recognizes that future progress in elementary

  5. Structural, Optical, and Transport Properties of -and Ag3VO4 K. R. Poeppelmeier,*,

    E-Print Network [OSTI]

    Poeppelmeier, Kenneth R.

    and impedance spectroscopy. In order to assess the optical and electrical properties of -Ag3VO4, in situ at room temperature. Instead, we measured these properties in situ on sintered polycrystalline samples measurements were performed above the phase-transition temperature. Thin films of -Ag3VO4 were prepared

  6. Bilayer thickness effects on nanoindentation behavior of Ag/Ni multilayers

    E-Print Network [OSTI]

    Hong, Soon Hyung

    by nanoindentation hardness and creep tests. The hardness increased with decreasing bilayer thickness, although of nanoindentation creep tests on Ag/Ni nanomultilayers with various bilayer thicknesses. Multilayered Ag/Ni films thickness. A nanoindentation creep test was used to study the creep behavior of nano- scale multilayers

  7. Hydrocarbon emission features in the IR spectra of warm supergiants

    SciTech Connect (OSTI)

    Buss, R.H. Jr.; Cohen, M.; Tielens, A.G.G.M.; Werner, M.W.; Bregman, J.D. (NASA, Ames Research Center, Moffett Field, CA (USA))

    1990-12-01T23:59:59.000Z

    Observations in the 3-13 micron range are presented for two objects possessing the unidentified 21-micron feature, IRAS 22272 and IRAS 07134, which were obtained in the course of search for circumstellar aromatic hydrocarbon (PAH) emission bands. The 3.3 and 6.2 micron bands are attributed to circumstellar PAH molecules, and the 6-9 micron plateau and the 12- and 6.9-micron lines are attributed to larger, aromatic hydrocarbon clusters. These are the coolest stars known to exhibit the IR emission bands. The 21-micron feature is conjectured to also originate in a carbonaceous carrier. 29 refs.

  8. This page shows how to use the My Pitt Video (Panopto) iOS application on an iPhone. To log in to the iOS app, swipe the screen to the right or click the menu button in the top left corner,

    E-Print Network [OSTI]

    Benos, Panayiotis "Takis"

    iPhone app iPhone app This page shows how to use the My Pitt Video (Panopto) iOS applicationPhone app View Panopto Sessions To view sessions on the My Pitt Video (Panopto) server, tap the menu button you would like the session to be stored. Enter a session name, and tap "Record a new video" and begin

  9. Large exchange bias enhancement in (Pt(or Pd)/Co)/IrMn/Co trilayers with ultrathin IrMn thanks to interfacial Cu dusting

    SciTech Connect (OSTI)

    Vinai, G. [SPINTEC, UMR 8191 CEA/CNRS/UJF/Grenoble-INP, CEA/INAC, 17, rue des Martyrs, 38054 Grenoble (France); Crocus Technology, 4 Place Robert Schuman, 38054 Grenoble (France); Moritz, J. [Institut Jean Lamour, UMR 7198 CNRS - Universit de Lorraine, Bd des Aiguillettes, BP 70239, F-54506 Vandoeuvre-les-Nancy Cedex (France); Bandiera, S. [Crocus Technology, 4 Place Robert Schuman, 38054 Grenoble (France); Prejbeanu, I. L.; Dieny, B. [SPINTEC, UMR 8191 CEA/CNRS/UJF/Grenoble-INP, CEA/INAC, 17, rue des Martyrs, 38054 Grenoble (France)

    2014-04-21T23:59:59.000Z

    The magnitude of exchange bias (H{sub ex}) at room temperature can be significantly enhanced in IrMn/Co and (Pt(or Pd)/Co)/IrMn/Co structures thanks to the insertion of an ultrathin Cu dusting layer at the IrMn/Co interface. The combination of trilayer structure and interfacial Cu dusting leads to a three-fold increase in H{sub ex} as compared to the conventional IrMn/Co bilayer structure, with an increased blocking temperature (T{sub B}) and a concave curvature of the temperature dependence H{sub ex}(T), ideal for improved Thermally Assisted-Magnetic Random Access Memory storage layer. This exchange bias enhancement is ascribed to a reduction of the spin frustration at the IrMn/Co interface thanks to interfacial Cu addition.

  10. Joint contributions of Ag ions and oxygen vacancies to conducting filament evolution of Ag/TaO{sub x}/Pt memory device

    SciTech Connect (OSTI)

    Chung, Yu-Lung; Cheng, Wen-Hui; Chen, Wei-Chih; Jhan, Sheng-An; Chen, Jen-Sue, E-mail: jenschen@mail.ncku.edu.tw [Department of Materials Science and Engineering, National Cheng Kung University, Tainan 701, Taiwan (China); Jeng, Jiann-Shing [Department of Materials Science, National University of Tainan, Tainan 700, Taiwan (China)

    2014-10-28T23:59:59.000Z

    The electroforming and resistive switching behaviors in the Ag/TaO{sub x}/Pt trilayer structure are investigated under a continual change of temperatures between 300?K and 100?K to distinguish the contributions of Ag ions and oxygen vacancies in developing of conducting filaments. For either electroforming or resistive switching, a significantly higher forming/set voltages is needed as the device is operated at 100?K, as compared to that observed when operating at 300?K. The disparity in forming/set voltages of Ag/TaO{sub x}/Pt operating at 300?K and 100?K is attributed to the contribution of oxygen vacancies, in addition to Ag atoms, in formation of conducting filament at 100?K since the mobilities of oxygen vacancies and Ag ions become comparable at low temperature. The presence of oxygen vacancy segment in the conducting filament also modifies the reset current from a gradually descending behavior (at 300?K) to a sharp drop (at 100?K). Furthermore, the characteristic set voltage and reset current are irreversible as the operation temperature is brought from 100?K back to 300?K, indicating the critical role of filament constituents on the switching behaviors of Ag/oxide/Pt system.

  11. Optical and quantum efficiency analysis of (Ag,Cu)(In,Ga)Se2 absorber layers

    SciTech Connect (OSTI)

    Boyle, Jonathan; Hanket, Gregory; Shafarman, William

    2009-06-09T23:59:59.000Z

    (Ag,Cu)(In,Ga)Se2 thin films have been deposited by elemental co-evaporation over a wide range of compositions and their optical properties characterized by transmission and reflection measurements and by relative shift analysis of quantum efficiency device measurements. The optical bandgaps were determined by performing linear fits of (?h?)2 vs. h?, and the quantum efficiency bandgaps were determined by relative shift analysis of device curves with fixed Ga/(In+Ga) composition, but varying Ag/(Cu+Ag) composition. The determined experimental optical bandgap ranges of the Ga/(In+Ga) = 0.31, 0.52, and 0.82 groups, with Ag/(Cu+Ag) ranging from 0 to 1, were 1.19-1.45 eV, 1.32-1.56 eV, and 1.52-1.76 eV, respectively. The optical bowing parameter of the different Ga/(In+Ga) groups was also determined.

  12. SrAgZn and EuAgZn with KHg{sub 2}-type structureStructure, magnetic properties, and {sup 151}Eu Mssbauer spectroscopy

    SciTech Connect (OSTI)

    Gerke, Birgit; Rodewald, Ute Ch.; Niehaus, Oliver; Pttgen, Rainer, E-mail: pottgen@uni-muenster.de

    2013-07-15T23:59:59.000Z

    Samples of SrAgZn and EuAgZn were synthesized by reaction of the elements in sealed tantalum crucibles. Both structures were refined on the basis of single crystal X-ray diffractometer data: KHg{sub 2}-type, Imma, a=476.7(1), b=780.9(2), c=810.1(2) pm, R{sub 1}/wR{sub 2}=0.0189/0.0119, 381 F values for SrAg{sub 1.12}Zn{sub 0.88} and a=474.43(9), b=760.8(2), c=799.0(2) pm, R{sub 1}/wR{sub 2}=0.0226/0.0483, 370 F values for EuAg{sub 1.17}Zn{sub 0.83} with 13 variables per refinement. Silver and zinc are randomly distributed on the Hg position and build up three-dimensional networks. EuAgZn shows ferromagnetic ordering at 29(1) K. In the temperature range from 75 to 300 K the sample shows CurieWeiss behaviour with ?{sub eff}=7.87(1) ?{sub B}/Eu atom and ?{sub P}=37.1(1) K, indicating divalent europium. {sup 151}Eu Mssbauer spectroscopic measurements confirmed the divalent state with an isomer shift of ?9.31 mm/s at 78 K. Temperature dependent {sup 151}Eu data show first magnetic hyperfine field splitting at 25 K and a saturated magnetization of 17 T at 5.2 K. The temperature dependence can be described by an S=7/2 Brillouin function. - Graphical abstract: The near neighbor coordination of the strontium and europium atoms in SrAg{sub 1.12}Zn{sub 0.88}, EuAg{sub 1.17}Zn{sub 0.83}, and EuAuZn. - Highlights: Synthesis of new intermetallic zinc compounds SrAgZn and EuAgZn. Ferromagnetic ordering of EuAgZn at 29 K. Magnetic hyperfine field splitting in the {sup 151}Eu Mssbauer spectrum.

  13. Performance and measurements of the AGS and Booster beams

    SciTech Connect (OSTI)

    Weng, W.T. [AGS Department, Brookhaven National Laboratory, Upton, New York 11973-5000 (United States)

    1996-06-01T23:59:59.000Z

    In May 1995, the AGS reached its upgrade intensity goal of 6{times}10{sup 13} ppp, the highest world intensity record for a proton synchrotron on a single pulse basis. At the same time, the Booster reached 2.2{times}10{sup 13} ppp surpassing the design goal of 1.5{times}10{sup 13} ppp due to the introduction of second harmonic cavity during injection. The critical accelerator manipulations, such as resonance stopband corrections, second harmonics cavity, direct rf feedback, gamma-transition jump, longitudinal phase space dilution, and transverse instability damping, will be described as well as some beam measurements. Possible future intensity and brightness upgrades will also be reported. {copyright} {ital 1996 American Institute of Physics.}

  14. Intermediate hearth repair technique at Thyssen Stahl AG

    SciTech Connect (OSTI)

    Kowalski, W.; Bachhofen, H.J.; Ruether, P.; Ballewski, T. [Thyssen Stahl AG, Duisburg (Germany)

    1996-12-31T23:59:59.000Z

    Nowadays various techniques for the fastest possible intermediate repair and/or emplacement of refractory materials above the tuyere level allow a significant extension of furnace campaign life. The latter are hence now exclusively determined by the service life of the hearth. The improvement of hearth monitoring and the estimation of residual brick strength of the refractory lining on the basis of temperature measurements in the hearth enable the location of individual zones of premature wear. These measurement methods, which were developed by Thyssen Stahl AG, aid the decision to undertake selective repair of the hearth. Three areas of repair are differentiated: taphole zone; hearth wall, localized; and hearth wall, extensive. This hearth repair method is described in this report using the example of hearth refurbishing blast furnace 8, Hamborn.

  15. Advances in fabrication of Ag-clad Bi-2223 superconductors.

    SciTech Connect (OSTI)

    Balachandran, U.

    1998-09-04T23:59:59.000Z

    Powder-in-tube (PIT) processing was used to fabricate multifilamentary Ag-clad Bi{sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub y} (Bi-2223) superconductors for various electric power applications. Enhancements in the transport current properties of long lengths of multifilament tapes were achieved by increasing the packing density of the precursor powder, improving the mechanical deformation, and adjusting the cooling rate. The dependence of the critical current density on magnetic field and temperature for the optimally processed tapes was measured. J{sub c} was greater than 10{sup 4} (A/cm{sup 2}) at 20 K for magnetic field up to 3 T and parallel to the c-axis which is of interest for use in refrigerator coded magnets. An attempt was made to combine the good alignment of Bi-2223 grains in Ag-sheathed superconducting tapes to obtain high J{sub c} values at high temperature and low field, and good intrinsic pinning of YBa{sub 2}Cu{sub 3}O{sub 7{minus}d} (Y-123) thin film to maintain high J{sub c} values in high fields. A new composite multifilament tape was fabricated such that the central part contained Bi-2223 filaments, with the primary function of conducting the transport current. The central Bi-2223 filaments were surrounded by Y-123 thin film to shield the applied magnetic field and protect the Bi-2223 filaments. The J{sub c} values of the composite tape were better than those of an uncoated tape. In the case of 77 K applications, an I{sub c} of about 60 A was obtained in a 150 m long tape and zero applied magnetic field. In-situ strain characteristics of the mono- and multifilament tapes were conducted.

  16. ANGLE-RESOLVED PHOTOEMISSION STUDIES OF Ag, Au, AND Pt

    SciTech Connect (OSTI)

    Davis, R.F.; Mills, K.A.; Thornton, G.; Kevan, S.D.; Shirley, D.A.

    1980-06-01T23:59:59.000Z

    An important question regarding the technique of angle-resolved photoemission (ARP) is the extent to which it can be used to determine experimental valence-band dispersion relations E{sub i}({rvec k}) for single crystalline solids. In the case of the 3d and 4d transition metals, studies of copper, nickel, palladium, and silver, show that a model based on the assumption of direct interband transitions (direct-transition model) may be used, in conjunction with an appropriate final-state dispersion relation E{sub f}({rvec k}), to elucidate E{sub i}({rvec k}) for these materials along several high symmetry lines (primarily {Gamma}{Lambda}L) in k-space. To answer this question more generally, we have undertaken an extensive study of the valence band structures of other transition metals along various k-space lines. To date, studies have been extended to the (111) faces of the 5d metals Pt and Au along with the Pt(100) ((5 x 20) surface structure) face, and the (110) and (100) faces of Ag. The experiments were all conducted at SSRL, using synchrotron radiation in the range 6 eV < h{nu} < 34 eV. The results of these studies, combined with our previous Ag(111) work at these energies, allow us to invoke important conclusions concerning the relationships between ARP data, E{sub i}({rvec k}) and E{sub f}({rvec k}) for these materials. Several are summarized. For each crystal face investigated, the direct-transition model, along with a simple quasi-free-electron E{sub f}({rvec k}), was sufficient to determine experimental E{sub i}({rvec k}) relations along the appropriate k-space line that were in general agreement with theoretical RAPW band structure calculations. Essentially, we required E{sub f}({rvec k}) to be of the form (h{sup 2}/2m*)|{rvec k} + {rvec G}|{sup 2} + V{sub o}, where {rvec G} is a reciprocal lattice vector, fitting this relation to the appropriate calculated bulk conduction band near the center of the line under investigation, with the inner potential V{sub o} and the reduced mass m* as free parameters. An additional shift of V{sub o} was necessary for Ag(110) and Pt(100) data, to obtain better agreement with theoretical bands. While generally excellent agreement between experimental and theoretical bands was found for Ag, as was the case for other 3d and 4d metals, substantial disagreement was observed for Pt and Au in parts of the Brillouin zone. This is probably an indication that further theoretical work is needed for these more complicated elements. The agreement in Ag is illustrated by Fig. 1, where experimental and theoretical bands are compared for all three high-symmetry directions. The determinations of E{sub i}({rvec k}) for the {Lambda} directions were relatively simple because peaks in the ARP spectra of (111) faces were essentially all attributable to primary direct transition. However, the {Sigma}, {Sigma}{prime}, and {Delta} directions were complicated by secondary emission peaks and dispersionless density-of-states (DOS) features in the spectra of the (100) and (110) faces. Peak intensity resonances associated with the bulk conduction band structure near {Lambda} were observed for each crystal face, and these simplified the assignment of peaks in the ARP spectra. The relationship between these resonances, which appear to be rather general phenomena, and E{sub f}({rvec k}), will be discussed. In summary, it is clear from these and other studies that the ARP technique, in conjunction with the direct-transition model, is generally applicable to valence band mapping in single crystals, provided that a suitable final-state dispersion relation can be calculated. However, complications like those observed in the ARP spectra of Ag, Pt, and Au may make the determination of E{sub i}({rvec k}) relations considerably more difficult for more complicated systems.

  17. Transition voltages of vacuum-spaced and molecular junctions with Ag and Pt electrodes

    SciTech Connect (OSTI)

    Wu, Kunlin; Bai, Meilin; Hou, Shimin, E-mail: smhou@pku.edu.cn [Key Laboratory for the Physics and Chemistry of Nanodevices, Department of Electronics, Peking University, Beijing 100871 (China); Sanvito, Stefano [School of Physics, AMBER and CRANN Institute, Trinity College, Dublin 2 (Ireland)

    2014-07-07T23:59:59.000Z

    The transition voltage of vacuum-spaced and molecular junctions constructed with Ag and Pt electrodes is investigated by non-equilibrium Green's function formalism combined with density functional theory. Our calculations show that, similarly to the case of Au-vacuum-Au previously studied, the transition voltages of Ag and Pt metal-vacuum-metal junctions with atomic protrusions on the electrode surface are determined by the local density of states of the p-type atomic orbitals of the protrusion. Since the energy position of the Pt 6p atomic orbitals is higher than that of the 5p/6p of Ag and Au, the transition voltage of Pt-vacuum-Pt junctions is larger than that of both Ag-vacuum-Ag and Au-vacuum-Au junctions. When one moves to analyzing asymmetric molecular junctions constructed with biphenyl thiol as central molecule, then the transition voltage is found to depend on the specific bonding site for the sulfur atom in the thiol group. In particular agreement with experiments, where the largest transition voltage is found for Ag and the smallest for Pt, is obtained when one assumes S binding at the hollow-bridge site on the Ag/Au(111) surface and at the adatom site on the Pt(111) one. This demonstrates the critical role played by the linker-electrode binding geometry in determining the transition voltage of devices made of conjugated thiol molecules.

  18. Platinum Monolayer on IrFe CoreShell Nanoparticle Electrocatalysts for the Oxygen Reduction Reaction

    SciTech Connect (OSTI)

    Sasaki K.; Kuttiyiel, K.A.; Su, D.; Adzic, R.R.

    2012-04-19T23:59:59.000Z

    We synthesized high activity and stability platinum monolayer on IrFe core-shell nanoparticle electrocatalysts. Carbon-supported IrFe core-shell nanoparticles were synthesized by chemical reduction and subsequent thermal annealing. The formation of Ir shells on IrFe solid-solution alloy cores has been verified by scanning transmission electron microscopy coupled with energy-loss spectroscopy (EELS) and in situ X-ray absorption spectroscopy. The Pt monolayers were deposited on IrFe core-shell nanoparticles by galvanic replacement of underpotentially deposited Cu adatoms on the Ir shell surfaces. The specific and Pt mass activities for the ORR on the Pt monolayer on IrFe core-shell nanoparticle electrocatalyst are 0.46 mA/cm{sup 2} and 1.1 A/mg{sub Pt}, which are much higher than those on a commercial Pt/C electrocatalyst. High durability of Pt{sub ML}/IrFe/C has also been demonstrated by potential cycling tests. These high activity and durability observed can be ascribed to the structural and electronic interaction between the Pt monolayer and the IrFe core-shell nanoparticles.

  19. Nb3Sn Quadrupole Magnets for the LHC IR

    SciTech Connect (OSTI)

    Sabbi, G.; Caspi, S.; Chiesa, L.; Coccoli, M.; Dietderich, D.r.; Ferracin, P.; Gourlay, S.A.; Hafalia, R.R.; Lietzke, A.F.; McInturff, A.D.; Scanlan, R.M.

    2001-08-01T23:59:59.000Z

    The development of insertion quadrupoles with 205 T/m gradient and 90 mm bore represents a promising strategy to achieve the ultimate luminosity goal of 2.5 x 10{sup 34} cm{sup -2}s{sup -1} at the Large Hadron Collider (LHC). At present, Nb{sub 3}Sn is the only practical conductor which can meet these requirements. Since Nb{sub 3}Sn is brittle, and considerably more strain sensitive than NbTi, the design concepts and fabrication techniques developed for NbTi magnets need to be modified appropriately. In addition, IR magnets must provide high field quality and operate reliably under severe radiation loads. The results of conceptual design studies addressing these issues are presented.

  20. Nanoscale structure in AgSbTe2 determined by diffuse elastic neutron scattering

    SciTech Connect (OSTI)

    Specht, Eliot D [ORNL; Ma, Jie [ORNL; Delaire, Olivier A [ORNL; Budai, John D [ORNL; May, Andrew F [ORNL; Karapetrova, Evguenia A. [Argonne National Laboratory (ANL)

    2015-01-01T23:59:59.000Z

    Diffuse elastic neutron scattering measurements confirm that AgSbTe2 has a hierarchical structure, with defects on length scales from nanometers to microns. While scattering from mesoscale structure is consistent with previously-proposed structures in which Ag and Sb order on a NaCl lattice, more diffuse scattering from nanoscale structure suggests a structural rearrangement in which hexagonal layers form a combination of (ABC), (ABA), and (AAB) stacking sequences. The AgCrSe2 structure is the best-fitting model for the local atomic arrangements.

  1. au-ag alloy static: Topics by E-print Network

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

    Sec. 5 uncovers a bug in the running example 12 A Size Library of Near-Infrared Absorbing Hollow Au-Ag Nanoshells and Their Surprising in vivo Instability Chemistry Websites...

  2. SO2-induced stability of Ag-alumina catalysts in the SCR of NO...

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

    Peden.2009."SO2-induced stability of Ag-alumina catalysts in the SCR of NO with methane."Applied Catalysis. B, Environmental 88(1-2):98-105. Authors: X She M Flytzani-Stephanopoul...

  3. Annales Geophysicae (2005) 23: 553566 SRef-ID: 1432-0576/ag/2005-23-553

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    -00101 Helsinki, Finland 3Solar and Solar Terrestrial Missions Div., ESTEC, 2200 AG Noordwijk to play a key role in the flux and energy transport in the magnetotail. Most likely, these fast flows

  4. CONTENT ANR @ MSU AgBioResearch Planting Recommendations for Dry Edible Beans

    E-Print Network [OSTI]

    SKIP TO CONTENT ANR @ MSU AgBioResearch Home Bean Info Beet Info Directions History InfoVideos Links Planting Recommendations for Dry Edible Beans Market Class Variety Maturity Plants/Seeds/ Seeds

  5. CONTENT ANR @ MSU AgBioResearch Michigan Dry Bean Crop Protection Products

    E-Print Network [OSTI]

    SKIP TO CONTENT ANR @ MSU AgBioResearch Home Bean Info Beet Info Directions History InfoVideos Links Michigan Dry Bean Crop Protection Products Common Chemical Name Brand Name Company Crop Use Seed

  6. Mechanism of Homogeneous Ir(III) Catalyzed Regioselective Arylation of Olefins

    E-Print Network [OSTI]

    Goddard III, William A.

    . On the basis of this mechanism, we suggest new catalysts expected to have improved activity. Initiation by reduction. Recently, Matsumoto2-4 and Periana5 reported the synthesis of a novel Ir complex, [Ir (turn- over-frequency (TOF) of 10-3 s-1 at 200 C), but there are also problems with selectivity, cost

  7. A Comparison of LSA, WordNet and PMI-IR for Predicting User Click Behavior

    E-Print Network [OSTI]

    Hornof, Anthony

    A Comparison of LSA, WordNet and PMI-IR for Predicting User Click Behavior Ishwinder Kaur. This paper discusses a comparison of three semantic systems--LSA, WordNet and PMI-IR--to evaluate their performance in predicting the link that people would select given an information goal and a webpage. PMI

  8. The Nature of OH/IR Stars in the Galactic Centre Region Joris Blommaert,

    E-Print Network [OSTI]

    Sjouwerman, Lornt

    The Nature of OH/IR Stars in the Galactic Centre Region Joris Blommaert, Sterrewacht Leiden, P, 439 92 Onsala, Sweden Abstract. We report on infrared observations of stars in a field of 30 0 near distinct populations of OH/IR stars near the galactic centre is addressed. The dusttogas mass loss ratio

  9. Simulations of Merging Helion Bunches on the AGS Injection Porch

    SciTech Connect (OSTI)

    Gardner, C. J. [Brookhaven National Lab. (BNL), Upton, NY (United States). Collider-Accelerator Dept.

    2014-08-29T23:59:59.000Z

    During the setup of helions for the FY2014 RHIC run it was discovered that the standard scheme for merging bunches on the AGS injection porch required an injection kicker pulse shorter than what was available. To overcome this difficulty, K. Zeno proposed and developed an interesting and unusual alternative which uses RF harmonic numbers 12, 4, 2 (rather than the standard 8, 4, 2) to merge 8 helion bunches into 2. In this note we carry out simulations that illustrate how the alternative scheme works and how it compares with the standard scheme. This is done in Sections 13 and 14. A scheme in which 6 bunches are merged into 1 is simulated in Section 15. This may be useful if more helions per merged bunch are needed in future runs. General formulae for the simulations are given in Sections 9 through 12. For completeness, Sections 1 through 8 give a derivation of the turn-by-turn equations of longitudinal motion at constant magnetic field. The derivation is based on the work of MacLachlan. The reader may wish to skip over these Sections and start with Section 9.

  10. Electromagnetic properties of Bi-2223/Ag concentric tapes

    SciTech Connect (OSTI)

    Majoros, M.; Polak, M.; Kvitkovic, J.; Suchon, D. [Slovak Academy of Sciences, Bratislava (Slovakia). Inst. of Electrical Engineering] [Slovak Academy of Sciences, Bratislava (Slovakia). Inst. of Electrical Engineering; Martini, L.; Ottoboni, V.; Zannella, S. [CISE SpA, Segrate (Italy)] [CISE SpA, Segrate (Italy)

    1996-07-01T23:59:59.000Z

    It is well established that near the silver interface highly textured Bi-2223 layers compared to the inner ceramic core may be obtained. Thus Bi-2223 multilayered concentric tapes with silver matrix are very promising in increasing transport critical current densities. In the present work the authors report on the electromagnetic characterization of short tapes having in their cross-section a very thin HTS flattened ring with Ag inside and outside of it. The samples were prepared by the powder in tube method and have self-field critical current densities J{sub c} of the order of 3 {times} 10{sup 4} A/cm{sup 2} at 77 K. Transport and SQUID magnetization measurements revealed weak link nature of the samples in low magnetic fields. Large transport J{sub c}(B) hysteresis was observed at 4.2 K and magnetic fields up to 20 T. Magnetic field profiles measurements with miniature Hall sensors are in qualitative accordance with model calculations supposing homogeneous current density distribution across the superconducting core.

  11. The winds of Luminous Blue Variables and the Mass of AG Car

    E-Print Network [OSTI]

    Jorick S. Vink; Alex de Koter

    2002-07-15T23:59:59.000Z

    We present radiation-driven wind models for Luminous Blue Variables (LBVs) and predict their mass-loss rates. A comparison between our predictions and the observations of AG Car shows that the variable mass loss behaviour of LBVs is due the recombination/ionisation of Fe IV/III and Fe III/II. We also derive a present-day mass of 35 Msun for AG Car.

  12. Analysis of AGS E880 polarimeter data at Gy = 12.5.

    SciTech Connect (OSTI)

    Cadman, R.; Huang, H.; Krueger, K.; Spinka, H.; Underwood, D. (High Energy Physics); (Brookhaven National Laboratory)

    2012-02-23T23:59:59.000Z

    Data were collected with the AGS internal (E880) polarimeter at G{gamma} = 12.5 during the FY04 polarized proton run. Measurements were made with forward scintillation counters in coincidence with recoil counter telescopes, permitting an absolute calibration of the polarimeter for both nylon and carbon targets. The results are summarized and they will also be useful for an absolute calibration of the AGS CNI polarimeter at G{gamma} = 12.5.

  13. HIGH ENERGY PULSED POWER SYSTEM FOR AGS SUPER NEUTRINO FOCUSING HORN.

    SciTech Connect (OSTI)

    ZHANG, S.Y.; SANDBERG, J.; WENG, W.-T.

    2005-05-16T23:59:59.000Z

    This paper present a preliminary design of a 300 kA, 2.5 Hz pulsed power system. This system will drive the focusing horn of proposed Brookhaven AGS Neutrino Super Beam Facility for Very Long Baseline Neutrino Oscillation Experiment. The peak output power of the horn pulsed power system will reach Giga-watts, and the upgraded AGS will be capable of delivering 1 MW in beam power.

  14. Ag-Pd-Cu alloy inserted transparent indium tin oxide electrodes for organic solar cells

    SciTech Connect (OSTI)

    Kim, Hyo-Joong; Seo, Ki-Won; Kim, Han-Ki, E-mail: imdlhkkim@khu.ac.kr [Department of Advanced Materials Engineering for Information and Electronics, Kyung-Hee University, 1 Seocheon-dong, Yongin-si, Gyeonggi-do 446-701 (Korea, Republic of); Noh, Yong-Jin; Na, Seok-In [Graduate School of Flexible and Printable Electronics, Chonbuk National University, 664-14, Deokjin-dong, Jeonju-si, Jeollabuk-do 561-756 (Korea, Republic of)

    2014-09-01T23:59:59.000Z

    The authors report on the characteristics of Ag-Pd-Cu (APC) alloy-inserted indium tin oxide (ITO) films sputtered on a glass substrate at room temperature for application as transparent anodes in organic solar cells (OSCs). The effect of the APC interlayer thickness on the electrical, optical, structural, and morphological properties of the ITO/APC/ITO multilayer were investigated and compared to those of ITO/Ag/ITO multilayer electrodes. At the optimized APC thickness of 8?nm, the ITO/APC/ITO multilayer exhibited a resistivity of 8.55??10{sup ?5} ? cm, an optical transmittance of 82.63%, and a figure-of-merit value of 13.54??10{sup ?3} ?{sup ?1}, comparable to those of the ITO/Ag/ITO multilayer. Unlike the ITO/Ag/ITO multilayer, agglomeration of the metal interlayer was effectively relieved with APC interlayer due to existence of Pd and Cu elements in the thin region of the APC interlayer. The OSCs fabricated on the ITO/APC/ITO multilayer showed higher power conversion efficiency than that of OSCs prepared on the ITO/Ag/ITO multilayer below 10?nm due to the flatness of the APC layer. The improved performance of the OSCs with ITO/APC/ITO multilayer electrodes indicates that the APC alloy interlayer prevents the agglomeration of the Ag-based metal interlayer and can decrease the thickness of the metal interlayer in the oxide-metal-oxide multilayer of high-performance OSCs.

  15. The development of in-situ calibration method for divertor IR thermography in ITER

    SciTech Connect (OSTI)

    Takeuchi, M.; Sugie, T.; Ogawa, H.; Takeyama, S.; Itami, K. [Japan Atomic Energy Agency (Japan)

    2014-08-21T23:59:59.000Z

    For the development of the calibration method of the emissivity in IR light on the divertor plate in ITER divertor IR thermography system, the laboratory experiments have been performed by using IR instruments. The calibration of the IR camera was performed by the plane black body in the temperature of 100600 degC. The radiances of the tungsten heated by 280 degC were measured by the IR camera without filter (2.55.1 ?m) and with filter (2.95 ?m, 4.67 ?m). The preliminary data of the scattered light of the laser of 3.34 ?m that injected into the tungsten were acquired.

  16. I/O

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

    from outside of LANL, see instructions here: http:www.lanl.govprojectscomputingweb hpc.html Consultants left to right, back to front Ben Santos, Hal Marshall, Riley...

  17. os_io.c

    E-Print Network [OSTI]

    7232, if (n < 0). 7233, e = err_code_from_errno ()___err_code_from_errno();. 7234, else if (n == sizeof (execvp_errno)). 7235, {. 7236, errno(*__errno_location

  18. I/O

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

    languages, debugging * Parallel computing * HPC and Unix operating systems, utilities, libraries * Unix Linux scripting * Archival storage: High Performance Storage System...

  19. Palmer-IO.ppt

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's Possible for RenewableSpeedingBiomassPPPO Website

  20. I/O

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville PowerCherries 82981-1cnHigh School footballHydrogen andHypernuclei in Hall C High2January-March,

  1. I/O

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville PowerCherries 82981-1cnHigh School footballHydrogen andHypernuclei in Hall C

  2. I/O

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville PowerCherries 82981-1cnHigh School footballHydrogen andHypernuclei in Hall CIn this issue Things

  3. EFG IO?-90)

    Office of Legacy Management (LM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOn AprilA group currentBradleyTableSelling CorpNew 1325.8.Enaineer District2, j

  4. IO235U

    Office of Legacy Management (LM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOn AprilA groupTuba City, Arizona, DisposalFourthNrr-osams ADMIN551 - g 7635U 93 -256

  5. Temperature-dependent adsorption of surfactant molecules and associated crystallization kinetics of noncentrosymmetric Fe(IO{sub 3}){sub 3} nanorods in microemulsions

    SciTech Connect (OSTI)

    El-Kass, Moustafa [Universit de Savoie, Laboratoire SYMME, BP 80439, 74944 Annecy Le Vieux Cedex (France); Ladj, Rachid [Universit de Savoie, Laboratoire SYMME, BP 80439, 74944 Annecy Le Vieux Cedex (France); Universit Lyon1, CNRS, UMR 5007, LAGEP, CPE, 43 bd 11 Novembre 1918, F-69622 Villeurbanne (France); Mugnier, Yannick, E-mail: Yannick.Mugnier@univ-savoie.fr [Universit de Savoie, Laboratoire SYMME, BP 80439, 74944 Annecy Le Vieux Cedex (France); Le Dantec, Ronan [Universit de Savoie, Laboratoire SYMME, BP 80439, 74944 Annecy Le Vieux Cedex (France); Hadji, Rachid [Institut Jean Lamour, UMR CNRS n7198, Universit de Lorraine, Nancy 1, BP 239, 54506 Vandoeuvre-ls-Nancy Cedex (France); Marty, Jean-Christophe [Universit de Savoie, Laboratoire SYMME, BP 80439, 74944 Annecy Le Vieux Cedex (France); Rouxel, Didier [Institut Jean Lamour, UMR CNRS n7198, Universit de Lorraine, Nancy 1, BP 239, 54506 Vandoeuvre-ls-Nancy Cedex (France); Durand, Christiane [Universit de Savoie, Laboratoire SYMME, BP 80439, 74944 Annecy Le Vieux Cedex (France); Fontvieille, Dominique [UMR CARRTEL (INRA/Universit de Savoie), Laboratoire de Microbiologie Aquatique, BP 511, 74203 Thonon Cedex (France); Rogalska, Ewa [Structure et Ractivit des Systmes Molculaires Complexes, UMR 7565, Nancy Universit, BP 70239, 54506 Vandoeuvre-ls-Nancy cedex (France); and others

    2013-11-15T23:59:59.000Z

    Graphical abstract: - Highlights: Crystallization of Fe(IO{sub 3}){sub 3} in microemulsions probed by hyper-Rayleigh scattering. A faster growth and a better shape control of nanorods are obtained at 80 C. Different persistent cell deformations are related to the crystallization kinetics. A temperature-dependent adsorption of surfactants on nanorods is suggested. - Abstract: Aggregation-induced crystallization of iron iodate nanorods within organicinorganic aggregates of primary amorphous precursors is probed by time-dependent hyper-Rayleigh scattering measurements in Triton X-100 based-microemulsions. In the context of a growing interest of noncentrosymmetric oxide nanomaterials in multi-photon bioimaging, we demonstrate by a combination of X-ray diffraction and electron microscopy that an increase in the synthesis of temperature results in faster crystallization kinetics and in a better shape-control of the final Fe(IO{sub 3}){sub 3} nanorods. For initial microemulsions of fixed composition, room-temperature synthesis leads to bundles of 13 ?m long nanorods, whereas shorter individual nanorods are obtained when the temperature is increased. Results are interpreted in terms of kinetically unfavorable mesoscale transformations due to the strong binding interactions with Triton molecules. The interplay between the nanorod crystallization kinetics and their corresponding unit cell deformation, evidenced by lattice parameter refinements, is attributed to a temperature-dependent adsorption of surfactants molecules at the organicinorganic interface.

  6. THE AGS-BASED SUPER NEUTRINO BEAM FACILITY CONCEPTUAL DESIGN REPORT

    SciTech Connect (OSTI)

    WENG,W.T.; DIWAN,M.; RAPARIA,D.

    2004-10-08T23:59:59.000Z

    After more than 40 years of operation, the AGS is still at the heart of the Brookhaven hadron accelerator complex. This system of accelerators presently comprises a 200 MeV linac for the pre-acceleration of high intensity and polarized protons, two Tandem Van der Graaffs for the pre-acceleration of heavy ion beams, a versatile Booster that allows for efficient injection of all three types of beams into the AGS and, most recently, the two RHIC collider rings that produce high luminosity heavy ion and polarized proton collisions. For several years now, the AGS has held the world intensity record with more than 7 x 10{sup 13} protons accelerated in a single pulse. The requirements for the proton beam for the super neutrino beam are summarized and a schematic of the upgraded AGS is shown. Since the present number of protons per fill is already close to the required number, the upgrade is based on increasing the repetition rate and reducing beam losses (to avoid excessive shielding requirements and to maintain activation of the machine components at workable level). It is also important to preserve all the present capabilities of the AGS, in particular its role as injector to RHIC. The AGS Booster was built not only to allow the injection of any species of heavy ion into the AGS but to allow a fourfold increase of the AGS intensity. It is one-quarter the circumference of the AGS with the same aperture. However, the accumulation of four Booster loads in the AGS takes about 0.6 s, and is therefore not well suited for high average beam power operation. To minimize the injection time to about 1 ms, a 1.2 GeV linac will be used instead. This linac consists of the existing warm linac of 200 MeV and a new superconducting linac of 1.0 GeV. The multi-turn H{sup -} injection from a source of 30 mA and 720 {micro}s pulse width is sufficient to accumulate 9 x 10{sup 13} particle per pulse in the AGS[10]. The minimum ramp time of the AGS to full energy is presently 0.5 s; this must be upgraded to 0.2 s to reach the required repetition rate of 2.5 Hz. The required upgrade of the AGS power supply, the rf system, and other rate dependent accelerator issues is discussed. The design of the target/horn configuration is shown. The material selected for the proton target is a Carbon-Carbon composite. It is a 3-dimensional woven material that exhibits extremely low thermal expansion for temperatures up to 1000 C; for higher temperatures it responds like graphite. This property is important for greatly reducing the thermo-elastic stresses induced by the beam, thereby extending the life of the target. The target consists of a 80 cm long cylindrical rod of 12 mm diameter. The target intercepts a 2 mm rms proton beam of 10{sup 14} protons/pulse. The total energy deposited as heat in the target is 7.3 kJ with peak temperature rise of about 280 C. Heat will be removed from the target through forced convection of helium gas across its outside surface. The extracted proton beam uses an existing beamline at the AGS, but is then directed to a target station atop a constructed earthen hill. The target is followed by a downward slopping pion decay channel. This vertical arrangement keeps the target and decay pipe well above the water table in this area. The 11.3 degrees slope aims the neutrino beam at a water Cerenkov neutrino detector to be located in the Homestake mine at Lead, South Dakota. A 3-dimensional view of the beam transport line, target station, and decay tunnel is provided.

  7. Aging and annealing effects on properties of Ag-N dual-acceptor doped ZnO thin films

    SciTech Connect (OSTI)

    Swapna, R.; Amiruddin, R.; Santhosh Kumar, M. C. [Advanced Materials Laboratory, Department of Physics, National Institute of Technology, Tiruchirappalli -620 015 (India)

    2013-02-05T23:59:59.000Z

    Ag-N dual acceptor doping into ZnO has been proposed to realize p-ZnO thin film of different concentrations (1, 2 and 4 at.%) by spray pyrolysis at 623 K and then 4 at.% films annealed at 673 K and 723 K for 1 hr. X-ray diffraction studies reveal that all the films are preferentially oriented along (002) plane. Energy dispersive spectroscopy (EDS) confirms the presence of Ag and N in 2 at.% ZnO:(Ag, N) film. Hall measurement shows that 4 at.% ZnO:(Ag, N) film achieved minimum resistivity with high hole concentration. The p-type conductivity of the ZnO:(Ag, N) films is retained even after 180 days. Photoluminescence (PL) spectra of ZnO:(Ag, N) films show low density of native defects.

  8. Stretching and bending with flexible FT-IR process monitors, probes and software

    SciTech Connect (OSTI)

    Peters, D.C. [KVB/Analect, Utica, NY (United States)

    1995-12-31T23:59:59.000Z

    FT-IR process analyzers continue to gain recognition for reliable and accurate on-line analyses on a broad variety of processes around the world. When fast analyses are required, on-line FT-IR analyzers offer speed and specificity for many applications. The use of FT-IR spectroscopy, either in the Mid-IR region or Near IR region offers fundamental advantages over other technologies. These advantages make calibrations exceptionally stable for an analyzer over time and offer improved ease of calibration transfer between similar analyzers. Spectral region selection criteria are reviewed, to help define when to use the Mid-IR region or the Near-IR region (or even when to use parts of both) for a given sample stream. New fiber optic sampling probes for transmission, attenuated total reflection, diffuse reflection and web sensing have solved nagging problems. What many process analyzer specialists are discovering is that new probes are becoming available each month, offering newer process tolerance (can tolerate higher temp or pressure) or even new sampling approaches altogether. This paper describes on-line applications in pharmaceuticals, specialty chemicals, polymer production and refinery production which demonstrate the range of techniques used to appropriately optimize the on-line analyzer. In addition, calibration transfer issues will be discussed, demonstrating the importance of the software tools to help sort out the causes for cal errors (spectral contamination, etc.).

  9. An infrared study of galactic OH/IR stars. I. An optical/near-IR atlas of the Arecibo sample

    E-Print Network [OSTI]

    F. M. Jimnez-Esteban; L. Agudo-Mrida; D. Engels; P. Garca-Lario

    2005-09-27T23:59:59.000Z

    In this paper we present optical and near-infrared finding charts, accurate astrometry (~1") and single-epoch near-infrared photometry for 371 IRAS sources, 96% of those included in the so-called Arecibo sample of OH/IR stars (Eder et al. 1988; Lewis et al. 1990a; Chengalur et al. 1993). The main photometric properties of the stars in the sample are presented and discussed as well as the problems found during the process of identification of the optical/near-infrared counterparts. In addition, we also identify suitable reference stars in each field to be used for differential photometry purposes in the future. We find that 39% of the sources (144 in number) have no optical counterpart, 8 of them being invisible even at near infrared wavelengths. The relative distribution of sources with and without optical counterpart in the IRAS two-colour diagram and their characteristic near infrared colours are interpreted as the consequence of the increasing thickness of their circumstellar shells. Among the objects not detected at near infrared wavelengths four non-variable sources are proposed to be heavily obscured post-AGB stars which have just very recently left the AGB. Eight additional objects with unusually bright and/or blue near-infrared colours are identified as candidate post-AGB stars and/or proto-planetary nebulae.

  10. Preparation of grapheneAg composites and their application for electrochemical detection of chloride

    SciTech Connect (OSTI)

    Yu, Mei, E-mail: yumei@buaa.edu.cn [School of Materials Science and Engineering, Beihang University, Beijing 100191 (China)] [School of Materials Science and Engineering, Beihang University, Beijing 100191 (China); Liu, Pengrui; Zhang, Shilu; Liu, Jianhua; An, Junwei; Li, Songmei [School of Materials Science and Engineering, Beihang University, Beijing 100191 (China)] [School of Materials Science and Engineering, Beihang University, Beijing 100191 (China)

    2012-11-15T23:59:59.000Z

    Highlights: ? GrapheneAg composites were prepared in situ using ascorbic acid as green reducing agent. ? The morphology of Ag particles was irregular sheet and Ag particles homogeneously distributed on the graphene matrix. ? The surface-enhanced Raman scattering enhancement factor of D band is 5.85 for composites. ? The composites exhibited good sensitivity for the detection of chloride ions. -- Abstract: GrapheneAg composites were prepared in situ using ascorbic acid as green reducing agent. The composites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), selected-area electronic diffraction (SAED), and Raman spectrometer. It was showed that Ag particles homogeneously distributed on the graphene matrix. The morphology of Ag particles was irregular sheet with (1 1 1) basal plane. The surface-enhanced Raman scattering (SERS) enhancement factor of D band is 5.85 for composites. The application of the composites for electrochemical detection of chloride was studied by cyclic voltammetry. The composites exhibited good sensitivity for the detection of chloride ions. The maximum peak current of cyclic voltammetry curve in 5 mM KCl was 0.80 mA. In the range of 500 ?M to 50 mM for Cl{sup ?}, the current response was proportional and linear to the Cl{sup ?} concentration. The sensitivity to the detection for Cl{sup ?} was 0.059 (mA/mM) and the detection limit was 61 ?M for Cl{sup ?}. It indicates grapheneAg composites would be a competitive material for detection of halide.

  11. Progress in Solving the Elusive Ag Transport Mechanism in TRISO Coated Particles: What is new?

    SciTech Connect (OSTI)

    Isabella Van Rooyen

    2014-10-01T23:59:59.000Z

    The TRISO particle for HTRs has been developed to an advanced state where the coating withstands internal gas pressures and retains fission products during irradiation and under postulated accidents. However, one exception is Ag that has been found to be released from high quality TRISO coated particles when irradiated and can also during high temperature accident heating tests. Although out- of- pile laboratory tests have never hither to been able to demonstrate a diffusion process of Ag in SiC, effective diffusion coefficients have been derived to successfully reproduce measured Ag-110m releases from irradiated HTR fuel elements, compacts and TRISO particles It was found that silver transport through SiC does not proceed via bulk volume diffusion. Presently grain boundary diffusion that may be irradiation enhanced either by neutron bombardment or by the presence of fission products such as Pd, are being investigated. Recent studies of irradiated AGR-1 TRISO fuel using scanning transmission electron microscopy (STEM), transmission kukuchi diffraction (TKD) patterns and high resolution transmission electron microscopy (HRTEM) have been used to further the understanding of Ag transport through TRISO particles. No silver was observed in SiC grains, but Ag was identified at triple-points and grain boundaries of the SiC layer in the TRISO particle. Cadmium was also found in some of the very same triple junctions, but this could be related to silver behavior as Ag-110m decays to Cd-110. Palladium was identified as the main constituent of micron-sized precipitates present at the SiC grain boundaries and in most SiC grain boundaries and the potential role of Pd in the transport of Ag will be discussed.

  12. US-LARP Progress on LHC IR Upgrades Tanaji Sen, John Johnstone, Nikolai Mokhov, FNAL, Batavia, IL 60510

    E-Print Network [OSTI]

    Sen, Tanaji

    of a long-range interaction on the beams. IR DESIGNS Design and construction of next generation IR magnets in determining these parameters. The required field quality is another key input to the magnet designers. An IR to higher luminosity. In the designs to be presented here, we consider the inner triplet magnets

  13. Recap Clustering: Introduction Clustering in IR K-means Evaluation How many clusters? Introduction to Information Retrieval

    E-Print Network [OSTI]

    Nejdl, Wolfgang

    Recap Clustering: Introduction Clustering in IR K-means Evaluation How many clusters? Introduction;Recap Clustering: Introduction Clustering in IR K-means Evaluation How many clusters? Overview 1 Recap 2 Clustering: Introduction 3 Clustering in IR 4 K-means 5 Evaluation 6 How many clusters? Sch¨utze: Flat

  14. COUNTRY INSTITUTION DATE WEB ADDRESS IRAN University of Art Isfahn 08.03.2007 http://www.aui.ac.ir

    E-Print Network [OSTI]

    Di Pillo, Gianni

    COUNTRY INSTITUTION DATE WEB ADDRESS IRAN University of Art Isfahn 08.03.2007 http://www.aui.ac.ir IRAN Isfahn University of Technology 08.03.2007 http://www.iut.ac.ir IRAN The University of Isfahn 15/03/2011 http://www.ui.ac.ir IRAN Shahid Bahonar University of Kermn 06.06.2005 http

  15. Radiation from Ag high energy density Z-pinch plasmas and applications to lasing

    SciTech Connect (OSTI)

    Weller, M. E., E-mail: mweller@unr.edu; Safronova, A. S.; Kantsyrev, V. L.; Esaulov, A. A.; Shrestha, I.; Stafford, A.; Keim, S. F.; Shlyaptseva, V. V.; Osborne, G. C.; Petkov, E. E. [Physics Department, University of Nevada, Reno, Nevada 89557 (United States)] [Physics Department, University of Nevada, Reno, Nevada 89557 (United States); Apruzese, J. P.; Giuliani, J. L. [Naval Research Laboratory, Washington, District of Columbia 20375 (United States)] [Naval Research Laboratory, Washington, District of Columbia 20375 (United States); Chuvatin, A. S. [Ecole Polytechnique, 91128 Palaiseau (France)] [Ecole Polytechnique, 91128 Palaiseau (France)

    2014-03-15T23:59:59.000Z

    Silver (Ag) wire arrays were recently introduced as efficient x-ray radiators and have been shown to create L-shell plasmas that have the highest electron temperature (>1.8?keV) observed on the Zebra generator so far and upwards of 30?kJ of energy output. In this paper, results of single planar wire arrays and double planar wire arrays of Ag and mixed Ag and Al that were tested on the UNR Zebra generator are presented and compared. To further understand how L-shell Ag plasma evolves in time, a time-gated x-ray spectrometer was designed and fielded, which has a spectral range of approximately 3.55.0?. With this, L-shell Ag as well as cold L{sub ?} and L{sub ?} Ag lines was captured and analyzed along with photoconducting diode (PCD) signals (>0.8?keV). Along with PCD signals, other signals, such as filtered XRD (>0.2?keV) and Si-diodes (SiD) (>9?keV), are analyzed covering a broad range of energies from a few eV to greater than 53?keV. The observation and analysis of cold L{sub ?} and L{sub ?} lines show possible correlations with electron beams and SiD signals. Recently, an interesting issue regarding these Ag plasmas is whether lasing occurs in the Ne-like soft x-ray range, and if so, at what gains? To help answer this question, a non-local thermodynamic equilibrium (LTE) kinetic model was utilized to calculate theoretical lasing gains. It is shown that the Ag L-shell plasma conditions produced on the Zebra generator at 1.7 maximum current may be adequate to produce gains as high as 6?cm{sup ?1} for various 3p???3s transitions. Other potential lasing transitions, including higher Rydberg states, are also included in detail. The overall importance of Ag wire arrays and plasmas is discussed.

  16. Ab-Initio Determination of Novel Crystal Structures of the Thermoelectric Material MgAgSb

    SciTech Connect (OSTI)

    Kirkham, Melanie J [ORNL; Moreira Dos Santos, Antonio F [ORNL; Rawn, Claudia J [ORNL; Lara-Curzio, Edgar [ORNL; Sharp, Jeff W. [Marlow Industries, Inc; Thompson, Alan [Marlow Industries, Inc

    2012-01-01T23:59:59.000Z

    Materials with the half-Heusler structure possess interesting electrical and magnetic properties, including potential for thermoelectric applications. MgAgSb is compositionally and structurally related to many half-Heusler materials, but has not been extensively studied. This work presents the high-temperature X-ray diffraction analysis of MgAgSb between 27 and 420 C, complemented with thermoelectric property measurements. MgAgSb is found to exist in three different structures in this temperature region, taking the half-Heusler structure at high temperatures, a Cu2Sb-related structure at intermediate temperatures, and a previously unreported tetragonal structure at room temperature. All three structures are related by a distorted Mg-Sb rocksalt-type sublattice, differing primarily in the Ag location among the available tetrahedral sites. Transition temperatures between the three phases correlate well with discontinuities in the Seebeck coefficient and electrical conductivity; the best performance occurs with the novel room temperature phase. For application of MgAgSb as a thermoelectric material, it may be desirable to develop methods to stabilize the room temperature phase at higher temperatures.

  17. Improved Correction of IR Loss in Diffuse Shortwave Measurements: An ARM Value-Added Product

    SciTech Connect (OSTI)

    Younkin, K; Long, CN

    2003-11-01T23:59:59.000Z

    Simple single black detector pyranometers, such as the Eppley Precision Spectral Pyranometer (PSP) used by the Atmospheric Radiation Measurement (ARM) Program, are known to lose energy via infrared (IR) emission to the sky. This is especially a problem when making clear-sky diffuse shortwave (SW) measurements, which are inherently of low magnitude and suffer the greatest IR loss. Dutton et al. (2001) proposed a technique using information from collocated pyrgeometers to help compensate for this IR loss. The technique uses an empirically derived relationship between the pyrgeometer detector data (and alternatively the detector data plus the difference between the pyrgeometer case and dome temperatures) and the nighttime pyranometer IR loss data. This relationship is then used to apply a correction to the diffuse SW data during daylight hours. We developed an ARM value-added product (VAP) called the SW DIFF CORR 1DUTT VAP to apply the Dutton et al. correction technique to ARM PSP diffuse SW measurements.

  18. FT-IR spectroscopy technology, market evolution and future strategies of Bruker Optics Inc.

    E-Print Network [OSTI]

    Higdon, Thomas (Thomas Charles)

    2010-01-01T23:59:59.000Z

    This thesis explores the technology and market evolution of FT-IR spectroscopy over its nearly forty year history to aid in determining future product design and marketing strategies for an industry-leading firm, Bruker ...

  19. Hydrogen Bond Rearrangements in Water Probed with Temperature-Dependent 2D IR

    E-Print Network [OSTI]

    Nicodemus, Rebecca A.

    We use temperature-dependent two-dimensional infrared spectroscopy (2D IR) of dilute HOD in H2O to investigate hydrogen bond rearrangements in water. The OD stretching frequency is sensitive to its environment, and loss ...

  20. Highly Active and Stable MgAl2O4 Supported Rh and Ir Catalysts...

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

    and stability for methane steam reforming in the presence of simulated biomass-derived syngas. It was found that highly dispersed 2 nm Rh and 1 nm Ir clusters were formed on the...

  1. Perpendicular exchange bias effect in sputter-deposited CoFe/IrMn bilayers

    SciTech Connect (OSTI)

    Chen, J. Y., E-mail: chenjy02@gmail.com; Thiyagarajah, Naganivetha; Xu, H. J.; Coey, J. M. D. [School of Physics and CRANN, Trinity College, Dublin 2 (Ireland)

    2014-04-14T23:59:59.000Z

    CoFe/IrMn bilayers with perpendicular magnetization for various IrMn layer thicknesses exhibit unusual two-step hysteresis loops with both positive and negative loop shifts. Observed at room temperature in the as-grown state, they provide direct evidence of large antiferromagnetic domain formation at the IrMn interface. The exchange bias field reaches 100?mT with an IrMn layer thickness of 4?nm after field annealing at 200?C300?C in 800?mT, which is at least three times as large as the coercivity, and may be useful for reference layers of spin-valves or magnetic tunnel junctions with perpendicular magnetic anisotropy.

  2. Estimated IR and phosphorescence emission fluxes for specific Polycyclic Aromatic Hydrocarbons in the Red Rectangle

    E-Print Network [OSTI]

    G. Mulas; G. Malloci; C. Joblin; D. Toublanc

    2005-09-20T23:59:59.000Z

    Following the tentative identification of the blue luminescence in the Red Rectangle by Vijh et al. (2005), we compute absolute fluxes for the vibrational IR emission and phosphorescence bands of three small polycyclic aromatic hydrocarbons. The calculated IR spectra are compared with available ISO observations. A subset of the emission bands are predicted to be observable using presently available facilities, and can be used for an immediate, independent, discriminating test on their alleged presence in this well-known astronomical object.

  3. DRIVER ACCELERATOR DESIGN FOR THE 10 KW UPGRADE OF THE JEFFERSON LAB IR FEL

    E-Print Network [OSTI]

    DRIVER ACCELERATOR DESIGN FOR THE 10 KW UPGRADE OF THE JEFFERSON LAB IR FEL D. Douglas, S. V, Newport News, VA23606, USA Abstract An upgrade of the Jefferson Lab IR FEL [1] is now un- der construction. It will provide 10 kW output light power in a wavelength range of 210 m. The FEL will be driven by a modest

  4. Development of Au-Ag nanowire mesh fabrication by UV-induced approach

    SciTech Connect (OSTI)

    Saggar, Siddhartha [Laboratory for Molecular Photonics and Electronics, Department of Physics, National Institute of Technology, Calicut, Kerala, India and School of Nanoscience and Technology, National Institute of Technology, Calicut, Kerala (India); Predeep, Padmanabhan, E-mail: predeep@nitc.ac.in

    2014-10-15T23:59:59.000Z

    In an attempt to overcome the limitations of the presently prevailing transparent conducting electrode (TCE) - indium tin oxide (ITO) - many materials have been considered for replacing ITO. Recently, a novel method has been reported for the synthesis of Au-Ag nanowire (NW) mesh, and tested successfully for organic-light-emitting-diodes (OLEDs). It employs UV-induced reduction of gold- and silver- precursors to form Au-Ag NW mesh. In this report, Au-Ag NW mesh thin films are synthesized on glass substrates with an objective for use as facing-electrode for Organic Photovoltaics. Various issues and factors affecting the fabrication-process have been improved, and are also discussed here. The electrode showed good transmitivity, of around 95% (excluding that of glass substrate). The advantage of the technique is its simple processing method and cost-effectiveness.

  5. On the role of long range interactions for the adsorption of sexithiophene on Ag(110) surface

    SciTech Connect (OSTI)

    Matos, Jeronimo; Rojas, Tomas; Yildirim, Handan, E-mail: hyildirim@purdue.edu, E-mail: Abdelkader.Kara@ucf.edu; Kara, Abdelkader, E-mail: hyildirim@purdue.edu, E-mail: Abdelkader.Kara@ucf.edu [Department of Physics, University of Central Florida, Orlando, Florida, 32816 (United States)] [Department of Physics, University of Central Florida, Orlando, Florida, 32816 (United States)

    2014-04-14T23:59:59.000Z

    The adsorption characteristics of the sexithiophene (6T) molecule on Ag(110) are studied using density functional theory with the inclusion of van der Waals (vdW) interactions. The stable adsorption configurations on 6T on Ag(110) as well as the nature of bonding the Ag substrate are evaluated. We also assess the performance of the vdW-DF method in describing the adsorption, energetics, heights, as well as the interface characteristics with the Ag(110) surface. We find two lowest adsorption energy configurations, at which the 6T molecule aligns with its molecular long axis parallel and perpendicular to the [001] direction, to be energetically close to each other, suggesting that they may coexist. Our findings indicate a significant increase in the 6T adsorption energies upon the inclusion of vdW interactions with the highest increase obtained using the opt-type functionals, in particular with the optB86b-vdW functional. The revPBE-vdW and rPW86-vdW2 functionals lead to less enhancement in adsorption energies that is attributed to the strong repulsive nature of these functionals, in agreement with earlier predictions. Upon adsorption of the 6T molecule, the changes in the atomic and electronic structures of the 6T molecule and Ag surface are found to be negligible; there is no charge transfer, and no interface state is observed. The work function is reduced upon adsorption with the largest change is ?0.6 eV obtained using the optB88-vdW functional. The results are in good agreement with the available experimental observations of the adsorption configurations and the work function changes. Based on our results, we conclude that the nature of bonding for 6T on Ag(110) can be classified as strong physisorption.

  6. Ag and Au atoms intercalated in bilayer heterostructures of transition metal dichalcogenides and graphene

    SciTech Connect (OSTI)

    Iyikanat, F., E-mail: fadiliyikanat@iyte.edu.tr; Senger, R. T. [Department of Physics, Izmir Institute of Technology, 35430 Izmir (Turkey); Sahin, H., E-mail: hasan.sahin@uantwerpen.be; Peeters, F. M. [Department of Physics, University of Antwerp, 2610 Antwerp (Belgium)

    2014-09-01T23:59:59.000Z

    The diffusive motion of metal nanoparticles Au and Ag on monolayer and between bilayer heterostructures of transition metal dichalcogenides and graphene are investigated in the framework of density functional theory. We found that the minimum energy barriers for diffusion and the possibility of cluster formation depend strongly on both the type of nanoparticle and the type of monolayers and bilayers. Moreover, the tendency to form clusters of Ag and Au can be tuned by creating various bilayers. Tunability of the diffusion characteristics of adatoms in van der Waals heterostructures holds promise for controllable growth of nanostructures.

  7. Energy Saving and CO2 Reduction Concept at Lufthansa Technik AG Hamburg

    E-Print Network [OSTI]

    Fahs, J. P.

    2009-01-01T23:59:59.000Z

    -18, 2009 in Austin, Texas, USA ESL-IC-09-11-02 Proceedings of the Ninth International Conference for Enhanced Building Operations, Austin, Texas, November 17 - 19, 2009 ICEBO 2009 ? CO 2 - Reduction at Lufthansa Technik AG 10-Sep-09 Page 4 Agenda..., Austin, Texas, November 17 - 19, 2009 ICEBO 2009 ? CO 2 - Reduction at Lufthansa Technik AG 10-Sep-09 Page 9 Agenda Lufthansa ? Excellence in Aviation The Lufthansa Technik Base in Hamburg Our Environmental Responsibility EnergyCheck@LHT Case Studies...

  8. Synthesis of highly efficient antibacterial agent Ag doped ZnO nanorods: Structural, Raman and optical properties

    SciTech Connect (OSTI)

    Jan, Tariq; Iqbal, Javed, E-mail: javed.saggu@iiu.edu.pk [Laboratory of Nanoscience and Technology, Department of Physics, International Islamic University Islamabad (Pakistan); Ismail, Muhammad [Institute of Biomedical and Genetic Engineering (IBGE), Islamabad (Pakistan); Mahmood, Arshad [Nano Devices Labs, National Institute of Lasers and Optronics, Islamabad (Pakistan)

    2014-04-21T23:59:59.000Z

    Here, synthesis, structural, morphological, Raman, optical properties and antibacterial activity of undoped and Ag doped ZnO nanorods by chemical co-precipitation technique have been reported. Structural analysis has revealed that Ag doping cannot deteriorate the structure of ZnO and wurtzite phase is maintained. Lattice constants are found to be decreased with the Ag doping. Fourier transform infrared and Raman spectroscopy also confirm the X-ray diffraction results. Scanning electron microscopy results have demonstrated the formation of ZnO nanorods with average diameter and length of 96?nm and 700?nm, respectively. Raman spectroscopy results suggest that the Ag doping enhances the number of defects in ZnO crystal. It has been found from optical study that Ag doping results in positional shift of band edge absorption peak. This is attributed to the successful incorporation of Ag dopant into ZnO host matrix. The antibacterial activity of prepared nanorods has been determined by two different methods and compared to that of undoped ZnO nanorods. Ag doped ZnO nanorods exhibit excellent antibacterial activity as compared to that of undoped ZnO nanorods. This excellent antibacterial activity may be attributed to the presence of oxygen vacancies and Zn{sup 2+} interstitial defects. Our preliminary findings suggest that Ag doped ZnO nanorods can be used externally to control the spreading of infections related with tested bacterial strains.

  9. Long-term Hepatitis B Surface Antigen (HBsAg) Kinetics during Nucleoside/Nucleotide Analogue Therapy

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    -term Hepatitis B Surface Antigen (HBsAg) Kinetics during Nucleoside/Nucleotide Analogue Therapy: Finite Treatment regarding long-term HBsAg kinetics during treatment with nucleoside/nucleotide analogues is limited. The aim of the present study was to assess whether finite nucleoside/nucleotide analogue treatment duration could

  10. Thermoelectric transport of Se-rich Ag{sub 2}Se in normal phases and phase transitions

    SciTech Connect (OSTI)

    Mi, Wenlong; Lv, Yanhong [State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050 (China); CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences,1295 Dingxi Road, Shanghai 200050 (China); University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing 100049 (China); Qiu, Pengfei; Shi, Xun, E-mail: xshi@mail.sic.ac.cn, E-mail: cld@mail.sic.ac.cn; Chen, Lidong, E-mail: xshi@mail.sic.ac.cn, E-mail: cld@mail.sic.ac.cn [State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050 (China); CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences,1295 Dingxi Road, Shanghai 200050 (China); Zhang, Tiansong [CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences,1295 Dingxi Road, Shanghai 200050 (China)

    2014-03-31T23:59:59.000Z

    Small amount of Se atoms are used to tune the carrier concentrations (n{sub H}) and electrical transport in Ag{sub 2}Se. Significant enhancements in power factor and thermoelectric figure of merit (zT) are observed in the compositions of Ag{sub 2}Se{sub 1.06} and Ag{sub 2}Se{sub 1.08}. The excessive Se atoms do not change the intrinsically electron-conducting character in Ag{sub 2}Se. The detailed analysis reveals the experiment optimum carrier concentration in Ag{sub 2}Se is around 5??10{sup 18}?cm{sup ?3}. We also investigate the temperature of maximum zT and the thermoelectric transport during the first order phase transitions using the recently developed measurement system.

  11. A first principle study for the adsorption and absorption of carbon atom and the CO dissociation on Ir(100) surface

    SciTech Connect (OSTI)

    Erikat, I. A., E-mail: ihsanas@yahoo.com [Department of Physics, Jerash University, Jerash-26150 (Jordan); Hamad, B. A. [Department of Physics, The University of Jordan, Amman-11942 (Jordan)] [Department of Physics, The University of Jordan, Amman-11942 (Jordan)

    2013-11-07T23:59:59.000Z

    We employ density functional theory to examine the adsorption and absorption of carbon atom as well as the dissociation of carbon monoxide on Ir(100) surface. We find that carbon atoms bind strongly with Ir(100) surface and prefer the high coordination hollow site for all coverages. In the case of 0.75?ML coverage of carbon, we obtain a bridging metal structure due to the balance between IrC and IrIr interactions. In the subsurface region, the carbon atom prefers the octahedral site of Ir(100) surface. We find large diffusion barrier for carbon atom into Ir(100) surface (2.70 eV) due to the strong bonding between carbon atom and Ir(100) surface, whereas we find a very small segregation barrier (0.22 eV) from subsurface to the surface. The minimum energy path and energy barrier for the dissociation of CO on Ir(100) surface are obtained by using climbing image nudge elastic band. The energy barrier of CO dissociation on Ir(100) surface is found to be 3.01 eV, which is appreciably larger than the association energy (1.61 eV) of this molecule.

  12. Recommended Academic Plan for Agricultural Science Major (AG SC) University Park

    E-Print Network [OSTI]

    Omiecinski, Curtis

    Total Credits: 15 Total Credits: 15 Bold type indicates courses requiring a quality grade of C Sciences (GS) 3 Elective 1-2 Humanities (GH) 3 Total Credits: 16 Total Credits: 16.5 Semester 3 Credits Sciences (GS) 3 Natural Resources/Ecology (1) 3 Ag and Environmental Policy (1) 3 Total Credits: 15.5 Total

  13. IL DIRIGENTE VISTA la Legge 2 dicembre 1991, n. 390 Norme sul diritto agli studi universitari;

    E-Print Network [OSTI]

    ; VISTO il Regolamento per l'Amministrazione, la Finanza e la Contabilit, emanato con D.R. n. 82/AG del studenti meritevoli mediante rimborso di una parte del costo sostenuto dagli studenti interessati ad dei requisiti necessari per parteciparvi. Il rimborso previsto sar pari al 75% del costo del corso

  14. Annales Geophysicae (2004) 22: 32913297 SRef-ID: 1432-0576/ag/2004-22-3291

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    to the interaction of the radar beam with the background wind (e.g. Atlas, 1964; Hocking, 1985; Nastrom, 1997). WhileAnnales Geophysicae (2004) 22: 3291­3297 SRef-ID: 1432-0576/ag/2004-22-3291 © European Geosciences- beamwidth method and the traditional method are very sim- ilar in regions of light winds (

  15. Annales Geophysicae (2004) 22: 23012308 SRef-ID: 1432-0576/ag/2004-22-2301

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Annales Geophysicae (2004) 22: 2301­2308 SRef-ID: 1432-0576/ag/2004-22-2301 © European Geosciences populations of Correspondence to: H. Kucharek (kucharek@atlas.sr.unh.edu) backstreaming ions (e.g. Gosling et beams. Sonnerup (1969) demonstrated that solar wind protons could easily be energized if the bow shock

  16. Annales Geophysicae (2004) 22: 40434048 SRef-ID: 1432-0576/ag/2004-22-4043

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    wind produced by three different numerical models in the European-Mediterranean area is analyzed observations of surface wind to predic- tive skill seems to be overall modest (Atlas et al., 2001Annales Geophysicae (2004) 22: 4043­4048 SRef-ID: 1432-0576/ag/2004-22-4043 © European Geosciences

  17. Outstanding Ag Leader Award Presented by MSU College of Agriculture and Montana Agricultural

    E-Print Network [OSTI]

    Maxwell, Bruce D.

    Outstanding Ag Leader Award Presented by MSU College of Agriculture and Montana Agricultural Experiment Station (MAES) Criteria for Selection Be well respected in their agricultural community of achievement in agriculture, be an industry leader, or an upcoming active innovative producer (or a combination

  18. FY2014 Parameters for Gold Ions in Booster, AGS, and RHIC

    SciTech Connect (OSTI)

    Gardner, C. J. [Brookhaven National Lab. (BNL), Upton, NY (United States). Collider-Accelerator Dept.

    2014-07-30T23:59:59.000Z

    The nominal parameters for gold ions in Booster, AGS, and RHIC are given for the FY2014 running period. The parameters are worked out using various formulas to derive mass, kinetic parameters, RF parameters, ring parameters etc.. The ''standard setup'', ''medium-energy'', and ''low-energy'' parameters are summarized in separate sections.

  19. FY2014 Parameters for Helions and Gold Ions in Booster, AGS, and RHIC

    SciTech Connect (OSTI)

    Gardner, C. J. [Brookhaven National Lab. (BNL), Upton, NY (United States). Collider-Accelerator Dept.

    2014-08-15T23:59:59.000Z

    The nominal parameters for helions (helion is the bound state of two protons and one neutron. It is the nucleus of a helium-3 atom.) and gold ions in Booster, AGS, and RHIC are given for the FY2014 running period. The parameters are found using various formulas to derive mass, helion anomalous g-factor, kinetic parameters, RF parameters, ring parameters etc..

  20. AG-325 (11/12) Texas A&M AgriLife

    E-Print Network [OSTI]

    AG-325 (11/12) Texas A&M AgriLife Administrative Services Inventory/Property Texas AgriLife Research Building Record Texas A&M University Office of Facilities Coordination Building Number: Building Lightweight Metal Walls 8 Glass (Greenhouse) Location Codes: A1 Main Campus A3 Airport Area B1 West

  1. Controlled Low-Temperature Molecular Manipulation of Sexiphenyl Molecules on Ag(111) Using Scanning Tunneling Microscopy

    E-Print Network [OSTI]

    Hla, Saw-Wai

    Controlled Low-Temperature Molecular Manipulation of Sexiphenyl Molecules on Ag(111) Using Scanning; published 11 November 2004) A novel scanning tunneling microscope manipulation scheme for a controlled displaced during imag- ing and often dragged with the STM tip [17]. Atomically controlled manipulation

  2. Valence band structure of the icosahedral Ag-In-Yb quasicrystal

    SciTech Connect (OSTI)

    Sharma, H. R.; Simutis, G.; Dhanak, V. R.; Nugent, P. J.; McGrath, R. [Surface Science Research Centre and Department of Physics, University of Liverpool, Liverpool L69 3BX (United Kingdom); Cui, C. [Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577 (Japan); Shimoda, M. [National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047 (Japan); Tsai, A. P. [Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577 (Japan); National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047 (Japan); Ishii, Y. [Department of Physics, Chuo University, Kasuga, Tokyo 112-8551 (Japan)

    2010-03-01T23:59:59.000Z

    The valence band structure of the icosahedral (i) Ag-In-Yb quasicrystal, which is isostructural to the binary i-Cd-Yb system, is investigated by ultraviolet photoemission spectroscopy (UPS). Experimental results are compared with electronic-structure calculations of a cubic approximant of the same phase. UPS spectra from the fivefold, threefold, and twofold i-Ag-In-Yb surfaces reveal that the valence band near to the Fermi level is dominated by Yb 4f-derived states, in agreement with calculations. The spectra also exhibit peaks which are surface core level shifted, caused by changes in the electronic structure in surface layers. Calculations yield a pseudogap in the density of states due to a hybridization of the Yb 5d band with the Ag 5p and In 5p bands. Both experimental and calculated band features are very similar to those of Cd-Yb. The modification of the band structure after surface treatment by sputtering and by oxidation is also studied. Additionally, the work function of i-Ag-In-Yb measured from the width of UPS spectrum is found to be almost unaffected by surface orientation, but increases after sputtering or oxidation.

  3. Crop & Soil Science Seminar Series Mondays at 4:00 pm in Ag Life Sciences

    E-Print Network [OSTI]

    Tullos, Desiree

    Crop & Soil Science Seminar Series Fall 2013 Mondays at 4:00 pm in Ag Life Sciences 4000 September 30 NO SEMINAR October 7 Dan Sullivan Crop & Soil Science Dept. "Phosphorus: Now and Then" October 14/CSSA/SSSA meetings) November 11 Chris Klatt Crop & Soil Science Dept. "Tracking Microbial Use of C and N

  4. Effects of stretching and cycling on the fatigue behavior of polymer-supported Ag thin films

    E-Print Network [OSTI]

    Effects of stretching and cycling on the fatigue behavior of polymer-supported Ag thin films Gi March 2013 Keywords: Fatigue Thin films Fatigue crack initiation Intergranular failure Ductile fracture on characterizing the mechanical behavior of thin metal films and have observed that metals in thin-film form can

  5. AG-704 (5/14) Texas A&M AgriLife

    E-Print Network [OSTI]

    Grant Remove Export: Records Management: Edit Text: View Audit Records: Other changes/notes regardingAG-704 (5/14) Texas A&M AgriLife Administrative Services Risk and Compliance Document Management System-User Access Form TEXAS A&M AGRILIFE DOCUMENT MANAGEMENT SYSTEM APPLICATIONS STATEMENT

  6. Photoelectrochemical hydrogen production from water/ methanol decomposition using Ag/TiO2 nanocomposite

    E-Print Network [OSTI]

    coal and gasoline [3]. Moreover, hydrogen can be used in fuel cells to generate electricity, or directly as a transportation fuel [4]. Hydrogen can be generated from hydrocarbons and water resourcesPhotoelectrochemical hydrogen production from water/ methanol decomposition using Ag/TiO2

  7. Pyrosequencing reveals higher impact of silver nanoparticles than AgD

    E-Print Network [OSTI]

    Alvarez, Pedro J.

    Pyrosequencing reveals higher impact of silver nanoparticles than AgD on the microbial community a , Mengyan Li a , James M. Tiedje b,c , Pedro J.J. Alvarez a, * a Department of Civil & Environmental Lansing, MI 48823, USA a r t i c l e i n f o Article history: Received 25 July 2013 Received in revised

  8. Integration of Laser-Welded Ag Nanowire Transparent Conducting Layers on Photovoltaic Devices (DMR-0819860)

    E-Print Network [OSTI]

    Petta, Jason

    Integration of Laser-Welded Ag Nanowire Transparent Conducting Layers on Photovoltaic Devices (DMR conducting layers in applications ranging from organic flexible electronics to rigid photovoltaics. However of a hybrid organic photovoltaic device [1]. The NWs are dispersed on the device and the network is welded

  9. AG-906 (08/11) Texas A&M AgriLife

    E-Print Network [OSTI]

    this exception: Cost prohibitive Underlying EIR technology platform not accessible Adequate skilled resourcesAG-906 (08/11) Texas A&M AgriLife Administrative Services Information Technology Electronic application Electronic Document (PDF, MS Word, PPT, etc.) Multimedia or video content Information technology

  10. CONTENT ANR @ MSU AgBioResearch 1999 DRY BEAN VARIETY CANNING TRIALS

    E-Print Network [OSTI]

    SKIP TO CONTENT ANR @ MSU AgBioResearch Home Bean Info Beet Info Directions History InfoVideos Links 1999 DRY BEAN VARIETY CANNING TRIALS MICHIGAN DRY BEAN PRODUCTION RESEARCH ADVISORY BOARD Rating 1=poor, 2=fair, 3=good, 4=above average, 5=excellent NAVY LIGHT RED KIDNEY BEANS VARIETY GRATIOT HURON 10

  11. CONTENT ANR @ MSU AgBioResearch 2000 DRY BEAN VARIETY CANNING TRIALS

    E-Print Network [OSTI]

    SKIP TO CONTENT ANR @ MSU AgBioResearch Home Bean Info Beet Info Directions History InfoVideos Links 2000 DRY BEAN VARIETY CANNING TRIALS MICHIGAN DRY BEAN PRODUCTION RESEARCH ADVISORY BOARD Rating 1=poor, 2=fair, 3=good, 4=above average, 5=excellent NAVY LIGHT RED KIDNEY BEANS VARIETY GRATIOT HURON 10

  12. Chemical Engineering Journal 97 (2004) 241248 Effects of Pt and Ag on the photocatalytic degradation

    E-Print Network [OSTI]

    Gulari, Erdogan

    Chemical Engineering Journal 97 (2004) 241­248 Effects of Pt and Ag on the photocatalytic, Thailand b Department of Chemical Engineering, The University of Michigan, Ann Arbor, MI 48109, USA, Erdogan Gularib a The Petroleum and Petrochemical College, Chulalongkorn University, Bangkok 10330

  13. Crawford:Apollo legAcy 6.24 A&G December 2012 Vol. 53

    E-Print Network [OSTI]

    Crawford, Ian

    Crawford:Apollo legAcy 6.24 A&G December 2012 Vol. 53 On the 40th anniversary of the last human expedition to the Moon, Ian Crawford reviews the scientific legacy of the Apollo programme and argues and Harrison "Jack" Schmitt of Apollo 17 left the lunar surface and returned safely to Earth. This anniversary

  14. Syntheses, crystal structures, and properties of EuRhIn, EuIr{sub 2}, and EuIrSn{sub 2}

    SciTech Connect (OSTI)

    Poettgen, R.; Hoffmann, R.D.; Moeller, M.H.; Kotzyba, G.; Kuennen, B.; Rosenhahn, C.; Mosel, B.D. [Univ. Muenster (Germany)] [Univ. Muenster (Germany)

    1999-06-01T23:59:59.000Z

    The title compounds were prepared from the elements by reactions in sealed tantalum tubes in a high-frequency furnace. Their structures were refined from single crystal X-ray diffractometer data: Pnma, a = 744.4(1) pm, b = 434.15(9) pm, c = 845.5(1) pm, wR2 = 0.0433, 658 F{sup 2} values, 20 variables for EuRhIn, Rd3m, a = 756.5(1) pm, wR2 = 0.0349, 94 F{sup 2} values, 5 variables for EuIr{sub 2}, and Cmcm, a = 434.78(3) pm, b = 1124.0(1) pm, c = 751.20(5) pm, wR2 = 0.0561, 565 F{sup 2} values, 16 variables for EuIrSn{sub 2}. EuRhIn crystallizes with a TiNiSi type structure that consists of strongly puckered Rh{sub 3}In{sub 3} hexagons. The europium atoms fill the channels within the three-dimensional [RhIn] polyanion. EuRhIn orders ferromagnetically at 22.0(5) K with a saturation magnetic moment of 6.7(1) {mu}{sub B}/Eu at 4 k and 5.5 T. The divalent character of the europium atoms in EuRhIn was determined from temperature dependent susceptibility (7.9 {mu}{sub B}/Eu in the high-temperature part) and {sup 151}Eu Moessbauer spectroscopic experiments. The latter show an isomer shift of {delta} = {minus}8.30(2) mm/s at 78 K. At 4.2 K full magnetic hyperfine field splitting subjected to significant quadrupole splitting of {Delta}E{sub Q} = 8 mm/s is observed. EuRhIn is a metallic conductor with a room temperature value of 58 {micro}{Omega}cm for the specific resistivity. The structure of the Laves phase EuIr{sub 2} is confirmed on the basis of single crystal X-ray data. The iridium atoms form a tetrahedral network with Ir-Ir distances of 268 pm. EuIrSn{sub 2} adopts a MgCuAl{sub 2} type structure that may be described as an iridium-filled variant of a distorted CaIn{sub 2}-like sublattice of composition EuSn{sub 2}. The tin atoms in the distorted and puckered hexagonal network have shorter (303 and 322 pm) and longer (343 pm) tin-tin contacts. 40 refs., 9 figs., 5 tabs.

  15. PdAgAu alloy with high resistance to corrosion by H{sub 2}S

    SciTech Connect (OSTI)

    Braun, Fernando; Miller, James B.; Gellman, Andrew J.; Tarditi, Ana M.; Fleutot, Benoit; Petro, Kondratyuk, Cornaglia, Laura M

    2012-12-01T23:59:59.000Z

    PdAgAu alloy films were prepared on porous stainless steel supports by sequential electroless deposition. Two specific compositions, Pd{sub 83}Ag{sub 2}Au{sub 15} and Pd{sub 74}Ag{sub 14}Au{sub 12}, were studied for their sulfur tolerance. The alloys and a reference Pd foil were exposed to 1000 H{sub 2}S/H{sub 2} at 623 K for periods of 3 and 30 hours. The microstructure, morphology and bulk composition of both nonexposed and H{sub 2}S-exposed samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). XRD and SEM analysis revealed time-dependent growth of a bulk Pd{sub 4}S phase on the Pd foil during H{sub 2}S exposure. In contrast, the PdAgAu ternary alloys displayed the same FCC structure before and after H{sub 2}S exposure. In agreement with the XRD and SEM results, sulfur was not detected in the bulk of either ternary alloy samples by EDS, even after 30 hours of H{sub 2}S exposure. X-ray photoelectron spectroscopy (XPS) depth profiles were acquired for both PdAgAu alloys after 3 and 30 hours of exposure to characterize sulfur contamination near their surfaces. Very low S 2p and S 2s XPS signals were observed at the top-surfaces of the PdAgAu alloys, and those signals disappeared before the etch depth reached ~ 10 nm, even for samples exposed to H{sub 2}S for 30 hours. The depth profile analyses also revealed silver and gold segregation to the surface of the alloys; preferential location of Au on the alloys surface may be related to their resistance to bulk sulfide formation. In preliminary tests, a PdAgAu alloy membrane displayed higher initial H{sub 2} permeability than a similarly prepared pure Pd sample and, consistent with resistance to bulk sulfide formation, lower permeability loss in H{sub 2}S than pure Pd.

  16. MID-IR LUMINOSITIES AND UV/OPTICAL STAR FORMATION RATES AT z < 1.4

    SciTech Connect (OSTI)

    Salim, Samir; Dickinson, Mark [National Optical Astronomy Observatory, 950 North Cherry Ave., Tucson, AZ 85719 (United States); Michael Rich, R. [Department of Physics and Astronomy, University of California, Los Angeles, CA 90095 (United States); Charlot, Stephane [Institut d'Astrophysique de Paris, CNRS, 98 bis boulevard Arago, F-75014 Paris (France); Lee, Janice C. [Carnegie Observatories, 813 Santa Barbara Street, Pasadena, CA 91101 (United States); Schiminovich, David [Department of Astronomy, Columbia University, New York, NY 10027 (United States); Perez-Gonzalez, Pablo G. [Departamento de AstrofIsica, Facultad de CC. FIsicas, Universidad Complutense de Madrid, E-28040 Madrid (Spain); Ashby, Matthew L. N.; Noeske, Kai [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Papovich, Casey; Weiner, Benjamin J. [Steward Observatory, University of Arizona, Tucson, AZ 85721 (United States); Faber, S. M. [University of California Observatories/Lick Observatory, University of California, Santa Cruz, CA 95064 (United States); Ivison, Rob J. [UK Astronomy Technology Centre, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ (United Kingdom); Frayer, David T. [Infrared Processing and Analysis Center, California Institute of Technology 100-22, Pasadena, CA 91125 (United States); Walton, Josiah M. [University of Arkansas, Fayetteville, AR 72701 (United States); Chary, Ranga-Ram [Spitzer Science Center, California Institute of Technology 220-6, Pasadena, CA 91125 (United States); Bundy, Kevin [Department of Astronomy and Astrophysics, University of Toronto, 50 St. George Street, Toronto, ON M5S 3H4 (Canada); Koekemoer, Anton M. [Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 (United States)], E-mail: samir@noao.edu

    2009-07-20T23:59:59.000Z

    Ultraviolet (UV) nonionizing continuum and mid-infrared (IR) emission constitute the basis of two widely used star formation (SF) indicators at intermediate and high redshifts. We study 2430 galaxies with z < 1.4 in the Extended Groth Strip with deep MIPS 24 {mu}m observations from FIDEL, spectroscopy from DEEP2, and UV, optical, and near-IR photometry from the AEGIS. The data are coupled with dust-reddened stellar population models and Bayesian spectral energy distribution (SED) fitting to estimate dust-corrected star formation rates (SFRs). In order to probe the dust heating from stellar populations of various ages, the derived SFRs were averaged over various timescales-from 100 Myr for 'current' SFR (corresponding to young stars) to 1-3 Gyr for long-timescale SFRs (corresponding to the light-weighted age of the dominant stellar populations). These SED-based UV/optical SFRs are compared to total IR luminosities extrapolated from 24 {mu}m observations, corresponding to 10-18 {mu}m rest frame. The total IR luminosities are in the range of normal star-forming galaxies and luminous IR galaxies (10{sup 10}-10{sup 12} L{sub sun}). We show that the IR luminosity can be estimated from the UV and optical photometry to within a factor of 2, implying that most z < 1.4 galaxies are not optically thick. We find that for the blue, actively star-forming galaxies the correlation between the IR luminosity and the UV/optical SFR shows a decrease in scatter when going from shorter to longer SFR-averaging timescales. We interpret this as the greater role of intermediate age stellar populations in heating the dust than what is typically assumed. Equivalently, we observe that the IR luminosity is better correlated with dust-corrected optical luminosity than with dust-corrected UV light. We find that this holds over the entire redshift range. Many so-called green valley galaxies are simply dust-obscured actively star-forming galaxies. However, there exist 24 {mu}m detected galaxies, some with L{sub IR}>10{sup 11} L{sub sun}, yet with little current SF. For them a reasonable amount of dust absorption of stellar light (but presumably higher than in nearby early-type galaxies) is sufficient to produce the observed levels of IR, which includes a large contribution from intermediate and old stellar populations. In our sample, which contains very few ultraluminous IR galaxies, optical and X-ray active galactic nuclei do not contribute on average more than {approx}50% to the mid-IR luminosity, and we see no evidence for a large population of 'IR excess' galaxies.

  17. Co layer thickness dependence of exchange biasing for IrMnCo and FeMnCo

    E-Print Network [OSTI]

    Reilly, Anne

    Co layer thickness dependence of exchange biasing for IrMnCo and FeMnCo K. A. Seua) and H. Huang) in IrMn/Co and FeMn/Co bilayers using the magneto-optical Kerr effect. Samples are sputtered wedges on silicon with Co thicknesses ranging from 1 to 17 nm. The IrMn/Co with exchange bias interface energy of 0

  18. Modulated IR radiometry for determining thermal properties and basic characteristics of titanium thin films

    SciTech Connect (OSTI)

    Apreutesei, Mihai [Centro de Fsica, Universidade do Minho, 4710-057 Braga, Portugal and MATEIS Laboratory-INSA de Lyon, Bt. B. Pascal, 7 Avenue Jean Capelle, 69621 Villeurbanne Cedex (France); Lopes, Claudia; Vaz, Filipe; Macedo, Francisco, E-mail: fmacedo@fisica.uminho.pt [Centro de Fsica, Universidade do Minho, 4710-057 Braga (Portugal); Borges, Joel [Centro de Fsica, Universidade do Minho, 4710-057 Braga, Portugal and SEG-CEMUC Mechanical Engineering Department, University of Coimbra, 3030-788 Coimbra (Portugal)

    2014-07-01T23:59:59.000Z

    Titanium thin films of different thicknesses were prepared by direct current magnetron sputtering to study modulated infrared (IR) radiometry as a tool for analyzing film thickness. Thickness was varied by regularly increasing the deposition time, keeping all the other deposition parameters constant. The influence of film thickness on morphological, structural, and electrical properties of the titanium coatings also was investigated. The experimental results revealed a systematic grain growth with increasing film thickness, along with enhanced film crystallinity, which led to increased electrical conductivity. Using the results obtained by modulated IR radiometry, the thickness of each thin film was calculated. These thickness values were then compared with the coating thickness measurements obtained by scanning electron microscopy. The values confirmed the reliability of modulated IR radiometry as an analysis tool for thin films and coatings, and for determining thicknesses in the micrometer range, in particular.

  19. UV/IR Mixing for Noncommutative Complex Scalar Field Theory, II (Interaction with Gauge Fields)

    E-Print Network [OSTI]

    I. Ya. Aref'eva; D. M. Belov; A. S. Koshelev; O. A. Rytchkov

    2000-03-20T23:59:59.000Z

    We consider noncommutative analogs of scalar electrodynamics and N=2 D=4 SUSY Yang-Mills theory. We show that one-loop renormalizability of noncommutative scalar electrodynamics requires the scalar potential to be an anticommutator squared. This form of the scalar potential differs from the one expected from the point of view of noncommutative gauge theories with extended SUSY containing a square of commutator. We show that fermion contributions restore the commutator in the scalar potential. This provides one-loop renormalizability of noncommutative N=2 SUSY gauge theory. We demonstrate a presence of non-integrable IR singularities in noncommutative scalar electrodynamics for general coupling constants. We find that for a special ratio of coupling constants these IR singularities vanish. Also we show that IR poles are absent in noncommutative N=2 SUSY gauge theory.

  20. Hermitian Analyticity, IR/UV Mixing and Unitarity of Noncommutative Field Theories

    E-Print Network [OSTI]

    Chong-Sun Chu; Jerzy Lukierski; Wojtek J. Zakrzewski

    2002-01-31T23:59:59.000Z

    The IR/UV mixing and the violation of unitarity are two of the most intriguing aspects of noncommutative quantum field theories. In this paper the relation between these two phenomena is explained and established. We start out by showing that the S-matrix of noncommutative field theories is hermitian analytic. As a consequence, a noncommutative field theory is unitary if the discontinuities of its Feynman diagram amplitudes agree with the expressions calculated using the Cutkosky formulae. These unitarity constraints relate the discontinuities of amplitudes with physical intermediate states; and allow us to see how the IR/UV mixing may lead to a breakdown of unitarity. Specifically, we show that the IR/UV singularity does not lead to the violation of unitarity in the space-space noncommutative case, but it does lead to its violation in a space-time noncommutative field theory. As a corollary, noncommutative field theory without IR/UV mixing will be unitary in both the space-space and space-time noncommutative case. To illustrate this, we introduce and analyse the noncommutative Lee model--an exactly solvable quantum field theory. We show that the model is free from the IR/UV mixing in both the space-space and space-time noncommutative cases. Our analysis is exact. Due to absence of the IR/UV mixing one can expect that the theory is unitary. We present some checks supporting this claim. Our analysis provides a counter example to the generally held beliefs that field theories with space-time noncommutativity are non-unitary.

  1. Mechanism of Efficient Anti-Markovnikov Olefin Hydroarylation Catalyzed by Homogeneous Ir(III) Complexes

    SciTech Connect (OSTI)

    Bhalla, Gaurav; Bischof, Steven M; Ganesh, Somesh K; Liu, Xiang Y; Jones, C J; Borzenko, Andrey; Tenn, William J; Ess, Daniel H; Hashiguchi, Brian G; Lokare, Kapil S; Leung, Chin Hin; Oxgaard, Jonas; Goddard, William A; Periana, Roy A

    2011-01-01T23:59:59.000Z

    The mechanism of the hydroarylation reaction between unactivated olefins (ethylene, propylene, and styrene) and benzene catalyzed by [(R)Ir(?-acac-O,O,C{sup 3})-(acac-O,O){sub 2}]{sub 2} and [R-Ir(acac-O,O){sub 2}(L)] (R = acetylacetonato, CH{sub 3}, CH{sub 2}CH{sub 3}, Ph, or CH{sub 2}CH{sub 2}Ph, and L = H{sub 2}O or pyridine) Ir(III) complexes was studied by experimental methods. The system is selective for generating the anti-Markovnikov product of linear alkylarenes (61:39 for benzene + propylene and 98:2 for benzene + styrene). The reaction mechanism was found to follow a rate law with first-order dependence on benzene and catalyst, but a non-linear dependence on olefin. {sup 13}C-labelling studies with CH{sub 3}{sup 13}CH{sub 2}-Ir-Py showed that reversible ?-hydride elimination is facile, but unproductive, giving exclusively saturated alkylarene products. The migration of the {sup 13}C-label from the ? to ?-positions was found to be slower than the CH activation of benzene (and thus formation of ethane and Ph-d{sub 5}-Ir-Py). Kinetic analysis under steady state conditions gave a ratio of the rate constants for CH activation and ?-hydride elimination (k{sub CH}: k{sub ?}) of ~0.5. The comparable magnitude of these rates suggests a common rate determining transition state/intermediate, which has been shown previously with B3LYP density functional theory (DFT) calculations. Overall, the mechanism of hydroarylation proceeds through a series of pre-equilibrium dissociative steps involving rupture of the dinuclear species or the loss of L from Ph-Ir-L to the solvento, 16-electron species, Ph-Ir(acac-O,O){sub 2}-Sol (where Sol refers to coordinated solvent). This species then undergoes trans to cisisomerization of the acetylacetonato ligand to yield the pseudo octahedral species cis-Ph-Ir-Sol, which is followed by olefin insertion (the regioselective and rate determining step), and then activation of the CH bond of an incoming benzene to generate the product and regenerate the catalyst.

  2. Origin of the phase transition in IrTe2: structural modulation and local bonding instability

    SciTech Connect (OSTI)

    Cao, Huibo [ORNL; Chakoumakos, Bryan C [ORNL; Yan, Jiaqiang [ORNL; Zhou, Haidong [ORNL; Custelcean, Radu [ORNL; Mandrus, D. [University of Tennessee (UTK) and Oak Ridge National Laboratory (ORNL); McGuire, Michael A [ORNL; Singh, David J [ORNL; Chen, Xin [ORNL; Yang, Hui [University of Tennessee, Knoxville (UTK)

    2013-01-01T23:59:59.000Z

    We used X-ray/neutron diffraction to determine the low temperature (LT) structure of IrTe2. A structural modulation was observed with a wavevector of k =(1/5, 0, 1/5) below Ts285 K, accompanied by a structural transition from a trigonal to a triclinic lattice. We also performed the first principles calculations for high temperature (HT) and LT structures, which elucidate the nature of the phase transition and the LT structure. A local bonding instability associated with the Te 5p states is likely the origin of the structural phase transition in IrTe2.

  3. Public Health Pesticide Inventory IR4/Karl MalamudRoam 4/11/2012 7:22 AM 2 Public Health Pesticide Inventory IR4/Karl MalamudRoam 4/11/2012 7:22 AM 3

    E-Print Network [OSTI]

    stici f Too ide ols fo s or #12; Public Health Pesticide Inventory ©IR4/Karl MalamudRoam 4/11/2012 7:22 AM 2 #12; Public Health Pesticide Inventory ©IR4/Karl MalamudRoam 4/11/2012 7 semiochemicals can be used effectively, safety, and legally for vector control. This inventory of public health

  4. Public Health Pesticide Inventory IR4/Karl MalamudRoam 4/11/2012 9:54 AM 2 Public Health Pesticide Inventory IR4/Karl MalamudRoam 4/11/2012 9:54 AM 3

    E-Print Network [OSTI]

    To stici of ools ide for s #12; Public Health Pesticide Inventory ©IR4/Karl MalamudRoam 4/11/2012 9:54 AM 2 #12; Public Health Pesticide Inventory ©IR4/Karl MalamudRoam 4/11/2012 9. This inventory of public health pesticides is intended to address two primary questions: 1) what chemical tools

  5. Improvement plans for the RHIC/AGS on-line model environments

    SciTech Connect (OSTI)

    Brown,K.A.; Ahrens, L.; Beebe-Wang, J.; Morris, J.; Nemesure, S.; Robert-Demolaize, G.; Satogata, T.; Schoefer, V.; Tepikian, S.

    2009-08-31T23:59:59.000Z

    The on-line models for Relativistic Ion Collider (RHIC) and the RHIC pre-injectors (the AGS and the AGS Booster) can be thought of as containing our best collective knowledge of these accelerators. As we improve these on-line models we are building the framework to have a sophisticated model-based controls system. Currently the RHIC on-line model is an integral part of the controls system, providing the interface for tune control, chromaticity control, and non-linear chromaticity control. What we discuss in this paper is our vision of the future of the on-line model environment for RHIC and the RHIC preinjectors. Although these on-line models are primarily used as Courant-Snyder parameter calculators using live machine settings, we envision expanding these environments to encompass many other problem domains.

  6. Synthesis and transport property of AgSbTe{sub 2} as a promising thermoelectric compound

    SciTech Connect (OSTI)

    Wang Heng; Li Jingfeng; Zou Minmin; Sui Tao [State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084 (China)

    2008-11-17T23:59:59.000Z

    Polycrystalline AgSbTe{sub 2} ternary compound materials with high phase purity were fabricated using a combined process of mechanical alloying and spark plasma sintering. It was found that stoichiometric AgSbTe{sub 2} is a promising composition for low-and-mediate temperature applications, whose ZT reaches 1.59 at 673 K, benefiting from its extremely low thermal conductivity (0.30 W/mK) in addition to its low electrical resistivity (<1.1x10{sup -4} {omega} m) and large positive Seebeck coefficient (260 {mu}V/K). On the other hand, deviating from this formula would lead to unstable phase structures and higher thermal conductivity, which make the samples less attractive as thermoelectric materials or components of thermoelectric systems.

  7. Optical and electronic properties of mixed Ag-Au tetramer cations

    SciTech Connect (OSTI)

    Shayeghi, A., E-mail: shayeghi@cluster.pc.chemie.tu-darmstadt.de; Schfer, R. [Eduard-Zintl-Institut, Technische Universitt Darmstadt, Alarich-Weiss-Strae 8, 64287 Darmstadt (Germany)] [Eduard-Zintl-Institut, Technische Universitt Darmstadt, Alarich-Weiss-Strae 8, 64287 Darmstadt (Germany); Heard, C. J.; Johnston, R. L. [School of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT (United Kingdom)] [School of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT (United Kingdom)

    2014-02-07T23:59:59.000Z

    We present experimental and theoretical studies of the optical response of mixed Ag {sub n} Au {sub 4?n}{sup +} (n=13) clusters in the photon energy range ?? = 1.93.5 eV. Absorption spectra are recorded by a newly built longitudinal molecular beam depletion spectroscopy apparatus providing lower limits to absolute photodissociation cross sections. The experimental data are compared to optical response calculations in the framework of long-range corrected time-dependent density functional theory with initial cluster geometries obtained by the unbiased Birmingham Cluster Genetic Algorithm coupled with density functional theory. Experiments and excited state calculations shed light on the structural and electronic properties of the mixed Ag-Au tetramer cations.

  8. Thermal measurements of active semiconductor micro-structures acquired through the substrate using near IR thermoreflectance

    E-Print Network [OSTI]

    , which precludes the use of typical surface thermal characterization techniques. A near infrared microscopy (SThM), or optical techniques such as infrared (IR) microscopy, or thermoreflectance to be able to measure the heating of devices in flip chip bonded integrated circuit's (IC) and other

  9. Fractal Plasmonics: Fabrication of "Cayley Tree Nanoantennas" and Characterization of Their Near-IR Plasmon Resonances

    E-Print Network [OSTI]

    GP-B-18 Fractal Plasmonics: Fabrication of "Cayley Tree Nanoantennas sensing, photothermal therapy, and wave guiding. In our present study structures with fractal and self into the visible and near-IR regions of the spectrum. Additionally, fractal geometries may give rise to multiple

  10. Hydrogen Bond Migration between Molecular Sites Observed with Ultrafast 2D IR Chemical Exchange Spectroscopy

    E-Print Network [OSTI]

    Fayer, Michael D.

    Hydrogen Bond Migration between Molecular Sites Observed with Ultrafast 2D IR Chemical ExchangeVed: January 12, 2010 Hydrogen-bonded complexes between phenol and phenylacetylene are studied using ultrafast hydrogen bonding acceptor sites (phenyl or acetylene) that compete for hydrogen bond donors in solution

  11. On the difference between type E and A OH/IR stars

    E-Print Network [OSTI]

    J. H. He; P. S. Chen

    2005-03-25T23:59:59.000Z

    The observed SEDs of a sample of 60 OH/IR stars are fitted using a radiative transfer model of a dusty envelope. Among the whole sample, 21 stars have reliable phase-lag distances while the others have less accurate distances. L*-P,Mlr-P and Mlr-L* relations have been plotted for these stars. It is found that type E (with emission feature at 10um and type A (with absorption feature at 10um) OH/IR stars have different L*-P and Mlr-L* relations while both of them follow a single Mlr-P relation. The type E stars are proven to be located in the area without large scale dense interstellar medium while the type A stars are located probably in dense interstellar medium. It is argued here that this may indicate the two types of OH/IR stars have different chemical composition or zero age main sequence mass and so evolve in different ways. This conclusion has reinforced the argument by Chen et al.(2001) who reached a similar conclusion from the galactic distribution of about 1000 OH/IR stars with the IRAS low-resolution spectra (LRS).

  12. ELSEVIER International Journal of Industrial Ergonomics 17 (1996) 285-290 Ir~ernattonatlournalc~

    E-Print Network [OSTI]

    Radwin, Robert G.

    1996-01-01T23:59:59.000Z

    ELSEVIER International Journal of Industrial Ergonomics 17 (1996) 285-290 Ir~ernattonatlournalc~ Industrial Ergonomics Short communication A new method for extending the range of conductive polymer sensors measurement instruments are important for providing ergonomics practitioners with a quantitative means

  13. Next Generation Optical Fiber for IR Applications: Novel Materials and NanoScale Textures

    E-Print Network [OSTI]

    Van Stryland, Eric

    Next Generation Optical Fiber for IR Applications: Novel Materials and NanoScale Textures Axel, Orlando, FL 32816, USA #12;Outline Impact of fiber optics What are next generation optical fibers achievements concerning the transmission of light in fibers for optical communication" Charles K. Kao Brief

  14. Interplay of IR-Improved DGLAP-CS Theory and NLO Parton Shower MC Precision

    E-Print Network [OSTI]

    Ward, B F L; Yost, S A

    2013-01-01T23:59:59.000Z

    We present the interplay between the new IR-improved DGLAP-CS theory and the precision of NLO parton shower/ME matched MC`s as it is realized by the new MC Herwiri1.031 in interface to MC@NLO. We discuss phenomenological implications using comparisons with recent LHC data on single heavy gauge boson production.

  15. Application of Wavelet Packet Transform in Pattern Recognition of Near-IR Data

    E-Print Network [OSTI]

    Guerrini, Carla

    . Construction of the pattern space: selection of representative training data. Data pretreatment: reduction is not methodical; it is a matter of common sense to select meaningful objects and variables. Data pretreat- ment, they are related to Fourier transformation, which has also been suggested for pretreating near-IR data.11 DWT

  16. Water Dynamics in Salt Solutions Studied with Ultrafast Two-Dimensional Infrared (2D IR)

    E-Print Network [OSTI]

    Fayer, Michael D.

    Water Dynamics in Salt Solutions Studied with Ultrafast Two-Dimensional Infrared (2D IR RECEIVED ON FEBRUARY 3, 2009 C O N S P E C T U S Water is ubiquitous in nature, but it exists as pure water infrequently. From the ocean to biology, water molecules interact with a wide variety of dissolved species

  17. Intern report ; IR 2008-01 Site speci c hazard estimates

    E-Print Network [OSTI]

    Stoffelen, Ad

    Intern report ; IR 2008-01 Site speci c hazard estimates for the LNG energy plant in the Europoort for the LNG energy plant in the Europoort area T. van Eck, F.H. Goutbeek, B. Dost De Bilt, February 2008 #12 differ significantly. Figure 1. Situation overview. The site of the LNG plant situated in the center

  18. A Touch Panel using Silicone Rubber with embedded IR-LEDs Yuichiro Sakamoto,

    E-Print Network [OSTI]

    Tanaka, Jiro

    LED LED FTIR FTIR FTIR FTIR FTIR LED LED A Touch Panel using Silicone Rubber with embedded Shizuki and Jiro Tanaka In this paper, we present a novel touch panel using silicone rubber with embedded are difficult to detect for one made of acryl panel Moreover, it integrates IR-LEDs silicone rubber for multi

  19. CONSTRUCTING AN ELASTIC TOUCH PANEL WITH EMBEDDED IR-LEDS USING SILICONE RUBBER

    E-Print Network [OSTI]

    Tanaka, Jiro

    CONSTRUCTING AN ELASTIC TOUCH PANEL WITH EMBEDDED IR-LEDS USING SILICONE RUBBER Yuichiro Sakamoto a technique for the construction of an elastic touch panel using silicone rubber. The technique is similar is made of transparent silicone rubber rather than acrylic. Moreover, we embedded infrared LEDs within

  20. Thermodynamics and superconductivity of Th7(Fe, Ru, Os, Co, Rh, Ir)3 system

    SciTech Connect (OSTI)

    Smith, James L [Los Alamos National Laboratory; Lashley, Jason C [Los Alamos National Laboratory; Volz, Heather M [Los Alamos National Laboratory; Fisher, Robert A [Los Alamos National Laboratory

    2008-01-01T23:59:59.000Z

    Expanding the temperature range of previous specific-heat measurements on the Th7(Fe, Ru, Os, Co, Rh, Ir)3 system, we measure the effect of transition-metal substitution on total entropy (S{sub 298 k}), electronic specific heat ({gamma}), and Debye temperature ({Theta}D). In addition we measure the pressure dependence, up to 10 kbar, of the superconducting transition.

  1. Deposition dynamics and chemical properties of size-selected Ir clusters on TiO2

    E-Print Network [OSTI]

    Anderson, Scott L.

    reserved. Keywords: Iridium; Clusters; Titanium oxide; X-ray photoelectron spectroscopy; Low energy ion report a study of Irn/TiO2 samples prepared by size and energy-selected deposition of Ir n (n 1, 2, 5 in the zero oxidation state, and there are no significant shifts in Ir 4f binding energy with cluster size

  2. Minimizing Energy Consumption in IR-UWB Based Wireless Sensor Networks

    E-Print Network [OSTI]

    Heinzelman, Wendi

    Minimizing Energy Consumption in IR-UWB Based Wireless Sensor Networks Tianqi Wang, Wendi communications systems, where transmit power can be flexibly adjusted to minimize the energy consumption [3] [4 Heinzelman and Alireza Seyedi Department of Electrical and Computer Engineering, University of Rochester

  3. Ionwater hydrogen-bond switching observed with 2D IR vibrational echo chemical

    E-Print Network [OSTI]

    Fayer, Michael D.

    Ion­water hydrogen-bond switching observed with 2D IR vibrational echo chemical exchange for review November 8, 2008) The exchange of water hydroxyl hydrogen bonds between anions and water oxygens of anion­ water hydroxyl hydrogen bond switching under thermal equilib- rium conditions as Taw 7 1 ps. Pump

  4. The chemical instability of Na{sub 2}IrO{sub 3} in air

    SciTech Connect (OSTI)

    Krizan, J.W., E-mail: jkrizan@princeton.edu; Roudebush, J.H.; Fox, G.M.; Cava, R.J.

    2014-04-01T23:59:59.000Z

    Highlights: Na{sub 2}IrO{sub 3} decomposes rapidly in laboratory air. The decomposition requires the simultaneous presence of CO{sub 2} and H{sub 2}O. Decomposition results in a dramatic change in the magnetic properties. Second 5 K feature in magnetic susceptibility not previously reported. - Abstract: We report that Na{sub 2}IrO{sub 3}, which has a layered honeycomb iridium oxide sublattice interleaved by Na planes, decomposes in laboratory air while maintaining the same basic crystal structure. The decomposition reaction was monitored by time-dependent powder X-ray diffraction under different ambient atmospheres, through which it was determined that it occurs only in the simultaneous presence of both CO{sub 2} and H{sub 2}O. A hydrated sodium carbonate is the primary decomposition product along with altered Na{sub 2}IrO{sub 3}. The diffraction signature of the altered Na{sub 2}IrO{sub 3} is quite similar to that of the pristine material, which makes the detection of decomposition difficult in a sample handled under ordinary laboratory conditions. The decomposed samples show a significantly decreased magnetic susceptibility and the disappearance of the low temperature antiferromagnetic transition considered to be characteristic of the phase. Samples that have never been exposed to air after synthesis display a previously unreported magnetic transition at 5 K.

  5. Neuroglobin dynamics observed with ultrafast 2D-IR vibrational echo spectroscopy

    E-Print Network [OSTI]

    Fayer, Michael D.

    Neuroglobin dynamics observed with ultrafast 2D-IR vibrational echo spectroscopy Haruto Ishikawa Contributed by Michael D. Fayer, August 15, 2007 (sent for review July 25, 2007) Neuroglobin (Ngb), a protein energy minimum. myoglobin mutants protein dynamics energy landscape Neuroglobin (Ngb) is a recently

  6. Report BNL-98726-2012-IR Tech. Note C-AD/AP/470

    E-Print Network [OSTI]

    Ohta, Shigemi

    Report BNL-98726-2012-IR Tech. Note C-AD/AP/470 Oct. 2012 ZGOUBI USERS' GUIDE ZGOUBI ON WEB : http://sourceforge.net/projects/zgoubith EDITION (1997) 13 INTRODUCTION 15 1 NUMERICAL CALCULATION OF MOTION AND FIELDS 17 1.1 zgoubi Frame

  7. as Ag Biotech Lived Up to Its Promise? (and what should the scientific community do about it?)

    E-Print Network [OSTI]

    Clark, E. Ann

    H as Ag Biotech Lived Up to Its Promise? (and what should the scientific community do about it?) E that conventional plant breeding could do - and better. He also had a section entitled Standing Up

  8. Assessing Youth Perceptions and Knowledge of Agriculture: The Impact of Participating in an AgVenture Program

    E-Print Network [OSTI]

    Luckey, Alisa

    2012-07-16T23:59:59.000Z

    Agriculture touches the lives of individuals every day, and some do not even realize it. As a means to educate society, agricultural education programs, such as "AgVenture," have been established to educate youth about the importance of agriculture...

  9. Underpotential deposition of Ag adlayers on Pt(111): Structures and determination of O{sub 2} adsorption on Pt(111)

    SciTech Connect (OSTI)

    Marinkovic, N.S.; Wang, J.X.; Adzic, R.R.

    1997-09-01T23:59:59.000Z

    The structure of Ag adlayers deposited at underpotentials in sulfuric acid on Pt(111), and the inhibition of O{sub 2} reduction they cause, have been studied using grazing incident angle x-ray diffraction measurements, as well as linear sweep voltammetry and in situ FTIR spectroscopy. Ag forms a hexagonal incommensurate bilayer, with two mutually commensurate monolayers. It is aligned with the Pt(111) substrate, although slightly expanded. The first monolayer has a commensurate (1 x 1) structure. A second layer causes a restructuring of the first monolayer. Deposition of each monolayer is associated with one voltammetry Peak. A complete inhibition of O{sub 2} reduction on Pt(111) has been observed upon deposition of both, Ag monolayer and bilayer. Analysis of the inhibition of O{sub 2} reduction as a function of the Ag coverage shows that during reduction O{sub 2} adsorbs in a bridge configuration on Pt(111).

  10. A model of the AGS based on stepwise ray-tracing through the measured field maps of the main magnets

    SciTech Connect (OSTI)

    Dutheil Y.; Meot, F.; Tsoupas, N.

    2012-05-20T23:59:59.000Z

    Two-dimensional mid-plane magnetic field maps of two of the main AGS magnets were produced, from Hall probe measurements, for a series of different current settings. The analysis of these data yielded the excitation functions [1] and the harmonic coefficients [2] of the main magnets which have been used so far in all the models of the AGS. The constant increase of the computation power makes it possible today to directly use a stepwise raytracing through these measured field maps with a reasonable computation time. We describe in detail how these field maps have allowed the generation of models of the 6 different types of AGS main magnets, and how they are being handled with the Zgoubi ray-tracing code [3]. We give and discuss a number of results obtained regarding both beam and spin dynamics in the AGS, and we provide comparisons with other numerical and analytical modelling methods.

  11. Electrodeposited Ag-Stabilization Layer for High Temperature Superconducting Coated Conductors: Preprint

    SciTech Connect (OSTI)

    Bhattacharya, R. N.; Mann, J.; Qiao, Y.; Zhang, Y.; Selvamanickam, V.

    2010-11-01T23:59:59.000Z

    We developed a non-aqueous based electrodepostion process of Ag-stabilization layer on YBCO superconductor tapes. The non-aqueous electroplating solution is non-reactive to the HTS layer thus does not detoriate the critical current capability of the superconductor layer when plated directly on the HTS tape. The superconducting current capabilities of these tapes were measured by non-contact magnetic measurements.

  12. Mobility with Hydrogen Fuel Cells Becomes Reality! 2Daimler AG / 09.02.2012

    E-Print Network [OSTI]

    California at Davis, University of

    Electric Vehicles, Plug-in Hybrids and Fuel Cell Electric Vehicles" -95% CO2 reduction by 2050 [g CO2/km #12;7Daimler AG / 06.06.2012 The Current Generation of Fuel Cell Vehicles ­ "Driving the Future" has Become Reality Technical Data Vehicle Mercedes-Benz B-Class F-CELL Fuel Cell System PEM, 80 kW (122 hp

  13. Laying the groundwork at the AGS: Recent results from experiment E895

    E-Print Network [OSTI]

    E895 Collaboration; M. A. Lisa; N. N. Ajitanand; J. M. Alexander; M. Anderson; D. Best; F. P. Brady; T. Case; W. Caskey; D. Cebra; J. L. Chance; P. Chung; B. Cole; K. Crowe; A. C. Das; J. E. Draper; M. L. Gilkes; S. Gushue; M. Heffner; A. S. Hirsch; E. L. Hjort; L. Huo; M. Justice; M. Kaplan; D. Keane; J. C. Kintner; J. Klay; D. Krofcheck; R. A. Lacey; C. Law; J. Lauret; H. Liu; Y. M. Liu; R. McGrath; Z. Milosevich; G. Odyniec; D. L. Olson; S. Y. Panitkin; C. Pinkenburg; N. T. Porile; G. Rai; H. G. Ritter; J. L. Romero; R. Scharenberg; L. Schroeder; B. Srivastava; N. T. B. Stone; T. J. M. Symons; S. Wang; R. Wells; J. Whitfield; T. Wienold; R. Witt; L. Wood; W. N. Zhang

    2001-04-11T23:59:59.000Z

    The E895 Collaboration at the Brookhaven AGS has performed a systematic investigation of Au+Au collisions at 2-8 AGeV, using a large-acceptance Time Projection Chamber. In addition to extensive measurements of particle flow, spectra, two-particle interferometry, and strangeness production, we have performed novel hybrid analyses, including azimuthally-sensitive pion HBT, extraction of the six-dimensional pion phasespace density, and a first measurement of the Lambda-proton correlation function.

  14. Spin tracking simulations in AGS based on ray-tracing methods - bare lattice, no snakes -

    SciTech Connect (OSTI)

    Meot, F.; Ahrens, L.; Gleen, J.; Huang, H.; Luccio, A.; MacKay, W. W.; Roser, T.; Tsoupas, N.

    2009-09-01T23:59:59.000Z

    This Note reports on the first simulations of and spin dynamics in the AGS using the ray-tracing code Zgoubi. It includes lattice analysis, comparisons with MAD, DA tracking, numerical calculation of depolarizing resonance strengths and comparisons with analytical models, etc. It also includes details on the setting-up of Zgoubi input data files and on the various numerical methods of concern in and available from Zgoubi. Simulations of crossing and neighboring of spin resonances in AGS ring, bare lattice, without snake, have been performed, in order to assess the capabilities of Zgoubi in that matter, and are reported here. This yields a rather long document. The two main reasons for that are, on the one hand the desire of an extended investigation of the energy span, and on the other hand a thorough comparison of Zgoubi results with analytical models as the 'thin lens' approximation, the weak resonance approximation, and the static case. Section 2 details the working hypothesis : AGS lattice data, formulae used for deriving various resonance related quantities from the ray-tracing based 'numerical experiments', etc. Section 3 gives inventories of the intrinsic and imperfection resonances together with, in a number of cases, the strengths derived from the ray-tracing. Section 4 gives the details of the numerical simulations of resonance crossing, including behavior of various quantities (closed orbit, synchrotron motion, etc.) aimed at controlling that the conditions of particle and spin motions are correct. In a similar manner Section 5 gives the details of the numerical simulations of spin motion in the static case: fixed energy in the neighboring of the resonance. In Section 6, weak resonances are explored, Zgoubi results are compared with the Fresnel integrals model. Section 7 shows the computation of the {rvec n} vector in the AGS lattice and tuning considered. Many details on the numerical conditions as data files etc. are given in the Appendix Section, pages A and sqs.

  15. Comparative Investigation of Benzene Steam Reforming over Spinel Supported Rh and Ir Catalysts

    SciTech Connect (OSTI)

    Mei, Donghai; Lebarbier, Vanessa MC; Rousseau, Roger J.; Glezakou, Vassiliki Alexandra; Albrecht, Karl O.; Kovarik, Libor; Flake, Matthew D.; Dagle, Robert A.

    2013-06-01T23:59:59.000Z

    In a combined experimental and first-principles density functional theory (DFT) study, benzene steam reforming (BSR) over MgAl2O4 supported Rh and Ir catalysts was investigated. Experimentally, it has been found that both highly dispersed Rh and Ir clusters (1-2 nm) on the MgAl2O4 spinel support are stable during the BSR in the temperature range of 700-850?C. Compared to the Ir/MgAl2O4 catalyst, the Rh/MgAl2O4 catalyst is more active with higher benzene turnover frequency and conversion. At typical steam conditions with the steam-to-carbon ratio > 12, the benzene conversion is only a weak function of the H2O concentration in the feed. This suggests that the initial benzene decomposition step rather than the benzene adsorption is most likely the rate-determined step in BSR over supported Rh and Ir catalysts. In order to understand the differences between the two catalysts, we followed with a comparative DFT study of initial benzene decomposition pathways over two representative model systems for each supported metal (Rh and Ir) catalysts. A periodic terrace (111) surface and an amorphous 50-atom metal cluster with a diameter of 1.0 nm were used to represent the two supported model catalysts under low and high dispersion conditions. Our DFT results show that the decreasing catalyst particle size enhances the benzene decomposition on supported Rh catalysts by lowering both C-C and C-H bond scission. The activation barriers of the C-C and the C-H bond scission decrease from 1.60 and 1.61 eV on the Rh(111) surface to 1.34 and 1.26 eV on the Rh50 cluster. For supported Ir catalysts, the decreasing particle size only affects the C-C scission. The activation barrier of the C-C scission of benzene decreases from 1.60 eV on the Ir(111) surface to 1.35 eV on the Ir50 cluster while the barriers of the C-H scission are practically the same. The experimentally measured higher BSR activity on the supported highly dispersed Rh catalyst can be rationalized by the thermodynamic limitation for the very first C-C bond scission of benzene on the small Ir50 catalyst. The C-C bond scission of benzene on the small Ir50 catalyst is highly endothermic although the barrier is competitive with the barriers of both the C-C and the C-H bond-breakings on the small Rh50 catalyst. The calculations also imply that, for the supported Rh catalysts the C-C and C-H bond scissions are competitive, independently of the Rh cluster sizes. After the initial dissociation step via either the C-C or the C-H bond scission, the C-H bond breaking seems to be more favorable rather than the C-C bond breaking on the larger Rh terrace surface. This work was financially supported by the United States Department of Energys Office of Biomass Programs. Computing time was granted by a user project at the Molecular Science Computing Facility in the William R. Wiley Environmental Molecular Sciences Laboratory (EMSL), a national scientific user facility sponsored by the Department of Energy's Office of Biological and Environmental Research and located at Pacific Northwest National Laboratory.

  16. Evidence for graphite-like hexagonal AlN nanosheets epitaxially grown on single crystal Ag(111)

    SciTech Connect (OSTI)

    Tsipas, P.; Kassavetis, S.; Tsoutsou, D.; Xenogiannopoulou, E.; Golias, E.; Giamini, S. A.; Dimoulas, A. [National Center for Scientific Research Demokritos, 15310 Athens (Greece)] [National Center for Scientific Research Demokritos, 15310 Athens (Greece); Grazianetti, C.; Fanciulli, M. [Laboratorio MDM, IMM-CNR, I-20864, Agrate Brianza (MB) (Italy) [Laboratorio MDM, IMM-CNR, I-20864, Agrate Brianza (MB) (Italy); Dipartimento di Scienza dei Materiali, Universit degli Studi di Milano Bicocca, I-20126, Milano (Italy); Chiappe, D.; Molle, A. [Laboratorio MDM, IMM-CNR, I-20864, Agrate Brianza (MB) (Italy)] [Laboratorio MDM, IMM-CNR, I-20864, Agrate Brianza (MB) (Italy)

    2013-12-16T23:59:59.000Z

    Ultrathin (sub-monolayer to 12 monolayers) AlN nanosheets are grown epitaxially by plasma assisted molecular beam epitaxy on Ag(111) single crystals. Electron diffraction and scanning tunneling microscopy provide evidence that AlN on Ag adopts a graphite-like hexagonal structure with a larger lattice constant compared to bulk-like wurtzite AlN. This claim is further supported by ultraviolet photoelectron spectroscopy indicating a reduced energy bandgap as expected for hexagonal AlN.

  17. MID-INFRARED IRS SPECTROSCOPY OF NGC 7331: A FIRST LOOK AT THE SPITZER INFRARED NEARBY GALAXIES SURVEY (SINGS) LEGACY

    E-Print Network [OSTI]

    Draine, Bruce T.

    MID-INFRARED IRS SPECTROSCOPY OF NGC 7331: A FIRST LOOK AT THE SPITZER INFRARED NEARBY GALAXIES to 38 m using all modules of Spitzer's Infrared Spectrograph (IRS). A strong new dust emission feature with standard photodissociation region (PDR) models. Either additional PDR heating or shocks are required

  18. Big picture Ads Duplicate detection Spam Web IR Size of the web Web Search and Text Mining

    E-Print Network [OSTI]

    Gray, Alexander

    Big picture Ads Duplicate detection Spam Web IR Size of the web Web Search and Text Mining http://www.cc.gatech.edu/~agray/6240spr11 IIR 19: Web Search Basics Alexander Gray Georgia Institute of Technology, College of Computing 2011 Gray: Web Search Basics 1 / 117 #12;Big picture Ads Duplicate detection Spam Web IR Size

  19. Synthesis, Structure, and Reactivity of O-Donor Ir(III) Complexes: C-H Activation Studies with Benzene

    E-Print Network [OSTI]

    Goddard III, William A.

    with Benzene Gaurav Bhalla, Xiang Yang Liu, Jonas Oxgaard, William A. Goddard, III, and Roy A. Periana. All the R-Ir-Py complexes undergo quantitative, intermolecular CH activation reactions with benzene to benzene to generate a discrete benzene complex, cis-R-Ir-PhH; and (D) rapid C-H cleavage. Kinetic isotope

  20. Silver (Ag) Transport Mechanisms in TRISO coated particles: A Critical Review

    SciTech Connect (OSTI)

    I J van Rooyen; J H Neethling; J A A Engelbrecht; P M van Rooyen; G Strydom

    2012-10-01T23:59:59.000Z

    Transport of 110mAg in the intact SiC layer of TRISO coated particles has been studied for approximately 30 years without arriving at a satisfactory explanation of the transport mechanism. In this paper the possible mechanisms postulated in previous experimental studies, both in-reactor and out-of reactor research environment studies are critically reviewed and of particular interest are relevance to very high temperature gas reactor operating and accident conditions. Among the factors thought to influence Ag transport are grain boundary stoichiometry, SiC grain size and shape, the presence of free silicon, nano-cracks, thermal decomposition, palladium attack, transmutation products, layer thinning and coated particle shape. Additionally new insight to nature and location of fission products has been gained via recent post irradiation electron microscopy examination of TRISO coated particles from the DOEs fuel development program. The combined effect of critical review and new analyses indicates a direction for investigating possible the Ag transport mechanism including the confidence level with which these mechanisms may be experimentally verified.

  1. Silver (Ag) Transport Mechanisms in TRISO Coated Particles: A Critical Review

    SciTech Connect (OSTI)

    IJ van Rooyen; ML Dunzik-Gougar; PM van Rooyen

    2014-05-01T23:59:59.000Z

    Transport of 110mAg in the intact SiC layer of TRISO coated particles has been studied for approximately 30 years without arriving at a satisfactory explanation of the transport mechanism. In this paper the possible mechanisms postulated in previous experimental studies, both in-reactor and out-of reactor research environment studies are critically reviewed and of particular interest are relevance to very high temperature gas reactor operating and accident conditions. Among the factors thought to influence Ag transport are grain boundary stoichiometry, SiC grain size and shape, the presence of free silicon, nano-cracks, thermal decomposition, palladium attack, transmutation products, layer thinning and coated particle shape. Additionally new insight to nature and location of fission products has been gained via recent post irradiation electron microscopy examination of TRISO coated particles from the DOEs fuel development program. The combined effect of critical review and new analyses indicates a direction for investigating possible the Ag transport mechanism including the confidence level with which these mechanisms may be experimentally verified.

  2. Dynamic XPS measurements of ultrathin polyelectrolyte films containing antibacterial AgCu nanoparticles

    SciTech Connect (OSTI)

    Taner-Camc?, Merve; Suzer, Sefik, E-mail: suzer@fen.bilkent.edu.tr [Department of Chemistry, Bilkent University, 06800 Ankara (Turkey)

    2014-03-15T23:59:59.000Z

    Ultrathin films consisting of polyelectrolyte layers prepared by layer-by-layer deposition technique and containing also Ag and Cu nanoparticles exhibit superior antibacterial activity toward Escherichia coli. These films have been investigated with XPS measurements under square wave excitation at two different frequencies, in order to further our understanding about the chemical/physical nature of the nanoparticles. Dubbed as dynamical XPS, such measurements bring out similarities and differences among the surface structures by correlating the binding energy shifts of the corresponding XPS peaks. Accordingly, it is observed that the Cu2p, Ag3d of the metal nanoparticles, and S2p of cysteine, the stabilizer and the capping agent, exhibit similar shifts. On the other hand, the C1s, N1s, and S2p peaks of the polyelectrolyte layers shift differently. This finding leads us the claim that the Ag and Cu atoms are in a nanoalloy structure, capped with cystein, as opposed to phase separated entities.

  3. GaSb substrates with extended IR wavelength for advanced space based applications

    SciTech Connect (OSTI)

    Allen, Lisa P.; Flint, Patrick; Dallas, Gordon; Bakken, Daniel; Blanchat, Kevin; Brown, Gail J.; Vangala, Shivashankar R.; Goodhue, William D.; Krishnaswami, Kannan

    2009-05-01T23:59:59.000Z

    GaSb substrates have advantages that make them attractive for implementation of a wide range of infrared (IR) detectors with higher operating temperatures for stealth and space based applications. A significant aspect that would enable widespread commercial application of GaSb wafers for very long wavelength IR (VLWIR) applications is the capability for transmissivity beyond 15 m. Due largely to the GaSb (antisite) defect and other point defects in undoped GaSb substrates, intrinsic GaSb is still slightly p-type and strongly absorbs in the VLWIR. This requires backside thinning of the GaSb substrate for IR transmissivity. An extremely low n-type GaSb substrate is preferred to eliminate thinning and provide a substrate solution for backside illuminated VLWIR devices. By providing a more homogeneous radial distribution of the melt solute to suppress GaSb formation and controlling the cooling rate, ultra low doped n:GaSb has been achieved. This study examines the surface properties and IR transmission spectra of ultra low doped GaSb substrates at both room and low temperatures. Atomic force microscopy (AFM), homoepitaxy by MBE, and infrared Fourier transform (FTIR) analysis was implemented to examine material quality. As compared with standard low doped GaSb, the ultra low doped substrates show over 50% transmission and consistent wavelength transparency past 23 m with improved %T at low temperature. Homoepitaxy and AFM results indicate the ultra low doped GaSb has a low thermal desorbtion character and qualified morphology. In summary, improvements in room temperature IR transmission and extended wavelength characteristics have been shown consistently for ultra low doped n:GaSb substrates.

  4. AGS SUPER NEUTRINO BEAM FACILITY ACCELERATOR AND TARGET SYSTEM DESIGN (NEUTRINO WORKING GROUP REPORT-II).

    SciTech Connect (OSTI)

    DIWAN,M.; MARCIANO,W.; WENG,W.; RAPARIA,D.

    2003-04-21T23:59:59.000Z

    This document describes the design of the accelerator and target systems for the AGS Super Neutrino Beam Facility. Under the direction of the Associate Laboratory Director Tom Kirk, BNL has established a Neutrino Working Group to explore the scientific case and facility requirements for a very long baseline neutrino experiment. Results of a study of the physics merit and detector performance was published in BNL-69395 in October 2002, where it was shown that a wide-band neutrino beam generated by a 1 MW proton beam from the AGS, coupled with a half megaton water Cerenkov detector located deep underground in the former Homestake mine in South Dakota would be able to measure the complete set of neutrino oscillation parameters: (1) precise determination of the oscillation parameters {Delta}m{sub 32}{sup 2} and sin{sup 2} 2{theta}{sub 32}; (2) detection of the oscillation of {nu}{sub {mu}}-{nu}{sub e} and measurement of sin{sup 2} 2{theta}{sub 13}; (3) measurement of {Delta}m{sub 21}{sup 2} sin 2{theta}{sub 12} in a {nu}{sub {mu}} {yields} {nu}{sub e} appearance mode, independent of the value of {theta}{sub 13}; (4) verification of matter enhancement and the sign of {Delta}m{sub 32}{sup 2}; and (5) determination of the CP-violation parameter {delta}{sub CP} in the neutrino sector. This report details the performance requirements and conceptual design of the accelerator and the target systems for the production of a neutrino beam by a 1.0 MW proton beam from the AGS. The major components of this facility include a new 1.2 GeV superconducting linac, ramping the AGS at 2.5 Hz, and the new target station for 1.0 MW beam. It also calls for moderate increase, about 30%, of the AGS intensity per pulse. Special care is taken to account for all sources of proton beam loss plus shielding and collimation of stray beam halo particles to ensure equipment reliability and personal safety. A preliminary cost estimate and schedule for the accelerator upgrade and target system are also included.

  5. Overexpression of IRS2 in isolated pancreatic islets causes proliferation and protects human {beta}-cells from hyperglycemia-induced apoptosis

    SciTech Connect (OSTI)

    Mohanty, S. [Division of Endocrinology and Diabetes, University Hospital of Zurich, 8091 Zurich (Switzerland); Spinas, G.A. [Division of Endocrinology and Diabetes, University Hospital of Zurich, 8091 Zurich (Switzerland); Maedler, K. [Division of Endocrinology and Diabetes, University Hospital of Zurich, 8091 Zurich (Switzerland); Zuellig, R.A. [Division of Endocrinology and Diabetes, University Hospital of Zurich, 8091 Zurich (Switzerland); Lehmann, R. [Division of Endocrinology and Diabetes, University Hospital of Zurich, 8091 Zurich (Switzerland); Donath, M.Y. [Division of Endocrinology and Diabetes, University Hospital of Zurich, 8091 Zurich (Switzerland); Trueb, T. [Universitaetsverwaltung, Stab fuer Sachmittel-Kredite, KUN110, Kuenstlergasse 15, 8001 Zurich (Switzerland); Niessen, M. [Division of Endocrinology and Diabetes, University Hospital of Zurich, 8091 Zurich (Switzerland)]. E-mail: markus.niessen@usz.ch

    2005-02-01T23:59:59.000Z

    Studies in vivo indicate that IRS2 plays an important role in maintaining functional {beta}-cell mass. To investigate if IRS2 autonomously affects {beta}-cells, we have studied proliferation, apoptosis, and {beta}-cell function in isolated rat and human islets after overexpression of IRS2 or IRS1. We found that {beta}-cell proliferation was significantly increased in rat islets overexpressing IRS2 while IRS1 was less effective. Moreover, proliferation of a {beta}-cell line, INS-1, was decreased after repression of Irs2 expression using RNA oligonucleotides. Overexpression of IRS2 in human islets significantly decreased apoptosis of {beta}-cells, induced by 33.3 mM D-glucose. However, IRS2 did not protect cultured rat islets against apoptosis in the presence of 0.5 mM palmitic acid. Overexpression of IRS2 in isolated rat islets significantly increased basal and D-glucose-stimulated insulin secretion as determined in perifusion experiments. Therefore, IRS2 is sufficient to induce proliferation in rat islets and to protect human {beta}-cells from D-glucose-induced apoptosis. In addition, IRS2 can improve {beta}-cell function. Our results indicate that IRS2 acts autonomously in {beta}-cells in maintenance and expansion of functional {beta}-cell mass in vivo.

  6. Enhanced photoresponse of conformal TiO{sub 2}/Ag nanorod array-based Schottky photodiodes fabricated via successive glancing angle and atomic layer deposition

    SciTech Connect (OSTI)

    Haider, Ali; Biyikli, Necmi, E-mail: biyikli@unam.bilkent.edu.tr [National Nanotechnology Research Center (UNAM), Bilkent University, Bilkent, Ankara 06800, Turkey and Institute of Materials Science and Nanotechnology, Bilkent University, Bilkent, Ankara 06800 (Turkey); Cansizoglu, Hilal; Cansizoglu, Mehmet Fatih; Karabacak, Tansel [Department of Physics and Astronomy, University of Arkansas at Little Rock, Little Rock, Arkansas 72204 (United States); Okyay, Ali Kemal [National Nanotechnology Research Center (UNAM), Bilkent University, Bilkent, Ankara 06800 (Turkey); Institute of Materials Science and Nanotechnology, Bilkent University, Bilkent, Ankara 06800 (Turkey); Department of Electrical and Electronics Engineering, Bilkent University, Bilkent, Ankara 06800 (Turkey)

    2015-01-01T23:59:59.000Z

    In this study, the authors demonstrate a proof of concept nanostructured photodiode fabrication method via successive glancing angle deposition (GLAD) and atomic layer deposition (ALD). The fabricated metal-semiconductor nanorod (NR) arrays offer enhanced photoresponse compared to conventional planar thin-film counterparts. Silver (Ag) metallic NR arrays were deposited on Ag-film/Si templates by utilizing GLAD. Subsequently, titanium dioxide (TiO{sub 2}) was deposited conformally on Ag NRs via ALD. Scanning electron microscopy studies confirmed the successful formation of vertically aligned Ag NRs deposited via GLAD and conformal deposition of TiO{sub 2} on Ag NRs via ALD. Following the growth of TiO{sub 2} on Ag NRs, aluminum metallic top contacts were formed to complete the fabrication of NR-based Schottky photodiodes. Nanostructured devices exhibited a photo response enhancement factor of 1.49??10{sup 2} under a reverse bias of 3 V.

  7. Design of highly ordered Ag-SrTiO{sub 3} nanotube arrays for photocatalytic degradation of methyl orange

    SciTech Connect (OSTI)

    Sun Yue [Key Laboratory of Design and Synthesis of Functional Materials and Green Catalysis, Colleges of Heilongjiang Province, College of Chemistry and Chemical Engineering, Harbin Normal University, Harbin 150025 (China); Liu Jiawen, E-mail: jiawenliu@yahoo.com.cn [Key Laboratory of Design and Synthesis of Functional Materials and Green Catalysis, Colleges of Heilongjiang Province, College of Chemistry and Chemical Engineering, Harbin Normal University, Harbin 150025 (China); Li Zhonghua, E-mail: lizh@hit.edu.cn [Key Laboratory of Microsystems and Microstructures Manufacturing, Ministry of Education, Harbin Institute of Technology, Harbin 150001 (China)

    2011-08-15T23:59:59.000Z

    Ag-SrTiO{sub 3} nanotube arrays were successfully prepared for the degradation of methyl orange (MO) under ultraviolet irradiation. In order to form highly ordered SrTiO{sub 3} nanotube arrays, the preparation of TiO{sub 2} nanotube arrays by anodic oxidation of titanium foil in different electrolytes was investigated. The selected organic solvents in electrolytes include glycerol, dimethyl sulfoxide and glycol. The results indicate that the morphology of TiO{sub 2} nanotube arrays prepared in glycol containing ammonium fluoride electrolyte is more regular. Then SrTiO{sub 3} nanotube arrays were synthesized by a hydrothermal method using TiO{sub 2} nanotube arrays as the precursor. In order to further improve the photocatalytic activity of SrTiO{sub 3} nanotube arrays, Ag nanoparticles were loaded on SrTiO{sub 3} nanotube arrays by two sets of experiments. The loaded Ag results in an enhancement of photocatalytic activity of SrTiO{sub 3} nanotube arrays. Moreover, the effect of pH on the photocatalytic degradation of MO was also studied. - Graphical abstract: Ag-SrTiO{sub 3} nanotube arrays were successfully prepared. The photocatalytic activity was evaluated by degradation of methyl orange under ultraviolet irradiation. Highlights: > TiO{sub 2} nanotube arrays prepared in glycol+NH{sub 4}F electrolyte are more regular. > Highly ordered Ag-SrTiO{sub 3} nanotube arrays were successfully synthesized. > Ag loading could enhance the photocatalytic activity of SrTiO{sub 3} nanotube arrays. > Ag-SrTiO{sub 3} nanotube arrays show excellent catalytic activity at a low pH value.

  8. The determination of Os and Ir by delayed X-ray spectrometry

    SciTech Connect (OSTI)

    Pillay, A.E.; Mashilo, N. (Univ. of Witwatersrand (South Africa))

    1990-01-01T23:59:59.000Z

    Delayed X-ray spectrometry preceded by fast neutron activation, is a relatively novel application and its capabilities as an analytical tool for the specific determination of Os and Ir in small powdered samples was evaluated. The investigation took the form of a feasibility study which relied heavily on the high sensitivity of the detector used. Detection of the delayed X-rays was achieved with a 100 mm{sup 2} Ge detector whose ability to produce optimum photopeak-to-noise ratios formed the basis exploited in this investigation. Analytical conditions are demonstrated over a range of concentrations for the elements of interest and the potential of the technique for application to the general routine analysis of Os and Ir is discussed. The authors indicate that interferences from the sample matrix can be suppressed to a degree which makes the method almost independent of the matrix. This and other attractive features make the technique a strong rival to conventional activation analysis.

  9. Linear dichroism amplification: Adapting a long-known technique for ultrasensitive femtosecond IR spectroscopy

    SciTech Connect (OSTI)

    Rehault, Julien; Helbing, Jan [Physikalisch-Chemisches Institut, Universitaet Zuerich, Winterthurerstrasse 190, 8057 Zuerich (Switzerland); Zanirato, Vinicio [Dipartimento di Scienze Farmaceutiche, Universita di Ferrara, via Fossato di Mortara 17-19, I-44100 Ferrara (Italy); Olivucci, Massimo [Dipartimento di Chimica, Universita di Siena, via Aldo Moro 2, I-53100 Siena (Italy) and Chemistry Department, Bowling Green State University, Bowling Green, Ohio 43403 (United States)

    2011-03-28T23:59:59.000Z

    We demonstrate strong amplification of polarization-sensitive transient IR signals using a pseudo-null crossed polarizer technique first proposed by Keston and Lospalluto [Fed. Proc. 10, 207 (1951)] and applied for nanosecond flash photolysis in the visible by Che et al. [Chem. Phys. Lett. 224, 145 (1994)]. We adapted the technique to ultrafast pulsed laser spectroscopy in the infrared using photoelastic modulators, which allow us to measure amplified linear dichroism at kilohertz repetition rates. The method was applied to a photoswitch of the N-alkylated Schiff base family in order to demonstrate its potential of strongly enhancing sensitivity and signal to noise in ultrafast transient IR experiments, to simplify spectra and to determine intramolecular transition dipole orientations.

  10. Elimination of IR/UV via Gravity in Noncommutative Field Theory

    E-Print Network [OSTI]

    N. Kersting; J. Yan

    2009-01-05T23:59:59.000Z

    Models of particle physics with Noncommutative Geometry (NCG) generally suffer from a manifestly non-Wilsonian coupling of infrared and ultraviolet degrees of freedom known as the "IR/UV Problem" which would tend to compromise their phenomenological relevance. In this Letter we explicitly show how one may remedy this by coupling NCG to gravity. In the simplest scenario the Lagrangian gets multiplied by a nonconstant background metric; in $\\phi-4$ theory the theorem that $\\int d^4 x \\phi \\star \\phi = \\int d^4 x \\phi^2$ is no longer true and the field propagator gets modified by a factor which depends on both NCG and the variation of the metric. A suitable limit of this factor as the propagating momentum gets asymptotically large then eradicates the IR/UV problem. With gravity and NCG coupled to each other, one might expect anti-symmetric components to arise in the metric. Cosmological implications of such are subsequently discussed.

  11. Enhanced oxygen evolution activity of IrO2 and RuO2 (100) surfaces

    SciTech Connect (OSTI)

    Stoerzinger, Kelsey [Massachusetts Institute of Technology (MIT)] [Massachusetts Institute of Technology (MIT); Qiao, Liang [ORNL] [ORNL; Biegalski, Michael D [ORNL] [ORNL; Christen, Hans M [ORNL] [ORNL; Shao-Horn, Yang [Massachusetts Institute of Technology (MIT)] [Massachusetts Institute of Technology (MIT)

    2014-01-01T23:59:59.000Z

    The activities of the oxygen evolution reaction (OER) on IrO2 and RuO2 catalysts are among the highest known to date. However, the intrinsic OER activities of surfaces with defined crystallographic orientations are not well established experimentally. Here we report that the (100) surface of IrO2 and RuO2 is more active than the (110) surface that has been traditionally explored by density functional theory studies. The relation between the OER activity and density of coordinatively undersaturated metal sites exposed on each rutile crystallographic facet is discussed. The surface-orientation dependent activities can guide the design of high-surface-area catalysts with increased activity for electrolyzers, metal-air batteries, and photoelectrochemical water splitting applications.

  12. SPECTRES DE RFLEXION ET CONSTANTES OPTIQUES DE LA PROUSTITE (Ag3AsS3) ENTRE 14 ET 600 cm-1

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    L-95 SPECTRES DE R?FLEXION ET CONSTANTES OPTIQUES DE LA PROUSTITE (Ag3AsS3) ENTRE 14 ET 600 cm-1, accepte le 6 janvier 1977) Résumé. 2014 Les constantes optiques de la proustite (Ag3AsS3), à 300 K et à 80 Optical constants of proustite (Ag3AsS3) are determined from 18 to 700 03BCm by Kra- mers-Kronig analysis

  13. Role of dipolar correlations in the IR spectra of water and ice

    E-Print Network [OSTI]

    Wei Chen; Manu Sharma; Raffaele Resta; Giulia Galli; Roberto Car

    2008-04-22T23:59:59.000Z

    We report simulated infrared spectra of deuterated water and ice using Car-Parrinello molecular dynamics with maximally localized Wannier functions. Experimental features are accurately reproduced within the harmonic approximation. By decomposing the lineshapes in terms of intra and intermolecular dipole correlation functions we find that short-range intermolecular dynamic charge fluctuations associated to hydrogen bonds are prominent over the entire spectral range. Our analysis reveals the origin of several spectral features and identifies network bending modes in the far IR range.

  14. UV/IR mixing via a Seiberg-Witten map for noncommutative QED

    SciTech Connect (OSTI)

    Raasakka, Matti [Department of Physics, University of Helsinki, P.O. Box 64, FIN-00014 Helsinki (Finland); Tureanu, Anca [Department of Physics, University of Helsinki, P.O. Box 64, FIN-00014 Helsinki (Finland); Helsinki Institute of Physics, P.O. Box 64, FIN-00014 Helsinki (Finland)

    2010-06-15T23:59:59.000Z

    We consider quantum electrodynamics in noncommutative spacetime by deriving a Seiberg-Witten map, nonperturbative in {theta}, with fermions in the fundamental representation of the gauge group as an expansion in the coupling constant. Accordingly, we demonstrate the persistence of UV/IR mixing in noncommutative QED with charged fermions via a Seiberg-Witten map, extending the results of Schupp and You [P. Schupp and J. You, J. High Energy Phys. 08 (2008) 107.].

  15. Practical Analysis of materials with depth varying compositions using FT-IR photoacoustic spectroscopy (PAS)

    SciTech Connect (OSTI)

    J.F. McClelland; R.W. Jones; Siquan Luo

    2004-09-30T23:59:59.000Z

    FT-IR photoacoustic spectroscopy (PAS) is discussed as a nondestructive method to probe the molecular composition of materials versus depth on the basis of the analysis of layers of experimentally controllable thickness, which are measured from the sample surface to depths of some tens of micrometers, depending on optical and thermal properties. Computational methods are described to process photoacoustic amplitude and phase spectra for both semi-quantitative and quantitative depth analyses. These methods are demonstrated on layered and gradient samples.

  16. Sign change of exchange bias in [Pt/Co]{sub 3}/IrMn multilayer

    SciTech Connect (OSTI)

    Yoon, Seungha; Kwon, Joonhyun; Cho, B. K., E-mail: chobk@gist.ac.kr [School of Materials Science and Engineering, Gwangju Institute of Science and Technology, 123 Cheomdan-gwagiro, Buk-gu, Gwangju 500-712 (Korea, Republic of)

    2014-05-07T23:59:59.000Z

    The properties of exchange bias in a multilayer of [Pt(1.0?nm)/Co(1.0?nm)]{sub 2}/Pt(t{sub Pt} nm)/Co(1.0?nm)/ IrMn(12.0?nm) were investigated with a variation of Pt layer thickness, t{sub Pt}. For t{sub Pt}???1.6?nm, it was typically observed that Co layers were ferromagnetically coupled while IrMn layer exhibited negative exchange bias. With increasing Pt thickness, antiferromagnetic (AF) interlayer coupling strength increased and caused AF spin configuration between the Co layers. With further increasing of Pt thickness (t{sub Pt}?=?2.5?nm), the exchange bias between Co and IrMn layers was changed from negative to positive. Therefore, a large enhancement of AF interlayer coupling induced the sign change of exchange bias from negative to positive and resulted in a drastic change of switching behavior in a magnetization reversal. Both extraordinary Hall-effect and magnetoresistance were measured to verify the exchange bias direction and spin configurations upon magnetization reversal.

  17. The a-WO{sub 3}/a-IrO{sub 2} electrochromic system

    SciTech Connect (OSTI)

    Cogan, S.F.; Rauh, R.D. [EIC Labs., Inc., Norwood, MA (United States)

    1990-12-31T23:59:59.000Z

    This article reviews the electrochemistry and optical switching performance of variable transmittance electrochromic devices based on the a-WO{sub 3}/a-IrO{sub 2} (a = amorphous) combination of electrochromic materials. The review concentrates on past research at EIC Laboratories on a-WO{sub 3}/a-IrO{sub 2} devices containing polymeric proton (H{sup +}) conductors with an ancillary discussion of devices using c-K{sub x}WO{sub 3+(x/2)} and the mixed oxide a-Mo{sub x}W{sub 1{minus}x}O{sub 3} as the primary electrochromic material. Approximately one half of the data presented has not been published previously, with the remaining data taken from articles in earlier SPIE volumes and the journal Solar Energy Materials. In recent years, there has been considerable interest in the development of electrochromic devices for control of solar throughput in building windows and for automotive applications. This review is concerned with complementary electrochromic windows based on cathodically coloring WO{sub 3} in combination with anodically coloring IrO{sub 2}. In the complementary configuration, both electrochromic materials participate in the coloration process, enhancing the efficiency of optical modulation while providing intrinsic charge-balance.

  18. Final technical report. In-situ FT-IR monitoring of a black liquor recovery boiler

    SciTech Connect (OSTI)

    James Markham; Joseph Cosgrove; David Marran; Jorge Neira; Chad Nelson; Peter Solomon

    1999-05-31T23:59:59.000Z

    This project developed and tested advanced Fourier transform infrared (FT-IR) instruments for process monitoring of black liquor recovery boilers. The state-of-the-art FT-IR instruments successfully operated in the harsh environment of a black liquor recovery boiler and provided a wealth of real-time process information. Concentrations of multiple gas species were simultaneously monitored in-situ across the combustion flow of the boiler and extractively at the stack. Sensitivity to changes of particulate fume and carryover levels in the process flow were also demonstrated. Boiler set-up and operation is a complex balance of conditions that influence the chemical and physical processes in the combustion flow. Operating parameters include black liquor flow rate, liquor temperature, nozzle pressure, primary air, secondary air, tertiary air, boiler excess oxygen and others. The in-process information provided by the FT-IR monitors can be used as a boiler control tool since species indicative of combustion efficiency (carbon monoxide, methane) and pollutant emissions (sulfur dioxide, hydrochloric acid and fume) were monitored in real-time and observed to fluctuate as operating conditions were varied. A high priority need of the U.S. industrial boiler market is improved measurement and control technology. The sensor technology demonstrated in this project is applicable to the need of industry.

  19. Unexpected behaviour of one Pb monolayer deposited on aluminum oxide thin film grown on Ag(111)

    SciTech Connect (OSTI)

    Vizzini, Sbastien, E-mail: sebastien.vizzini@im2np.fr; Bertoglio, M. [IM2NP CNRS, Aix Marseille Universit, F-13397 Marseille (France)] [IM2NP CNRS, Aix Marseille Universit, F-13397 Marseille (France); Oughaddou, Hamid [Institut des Sciences Molculaires d'Orsay, ISMO CNRS, Universit de Paris, F-91405 Orsay, France and Deptartamento de Physique, Universit de Cergy-Pontoise, F-95031 Cergy-Pontoise (France)] [Institut des Sciences Molculaires d'Orsay, ISMO CNRS, Universit de Paris, F-91405 Orsay, France and Deptartamento de Physique, Universit de Cergy-Pontoise, F-95031 Cergy-Pontoise (France); Hoarau, J. Y.; Biberian, J. P.; Aufray, B. [CINaM CNRS, Aix Marseille Universit, F-13288 Marseille (France)] [CINaM CNRS, Aix Marseille Universit, F-13288 Marseille (France)

    2013-12-23T23:59:59.000Z

    Using scanning tunneling microscopy (STM), Auger electron spectroscopy, and low energy electron diffraction, we have observed a surprising complete dissolution at room temperature of one lead monolayer deposited by evaporation on an aluminum oxide thin film (?0.8?nm thick) previously grown on Ag (111). We have observed the quasi-instantaneous diffusion of the lead deposit through the oxide layer to the silver/oxide interface. After the diffusion process, lead atoms form a Moir superstructure, which is characterized by STM through the oxide layer. This unexpected behavior puts in light the very weak interaction between the aluminum oxide and the silver substrate.

  20. Angular dependence of metamagnetic transitions in DyAgSb2

    E-Print Network [OSTI]

    Myers, KD; Canfield, PC; Kalatsky, VA; Pokrovsky, Valery L.

    1999-01-01T23:59:59.000Z

    -dependent critical fields. Recent theoretical work2 has analyzed these data within the frame- PRB 590163-1829/99/59~2!/1121~8!/$15.00 c transitions in DyAgSb2 P. C. Canfield , Iowa State University, Ames, Iowa 50010 V. L. Pokrovsky , College Station, Texas...! are magnetic isotherm for the sample cooled to 2 K from 12 K in a 19.7 kOe field. Note: the plateau at 19.7 kOe is stabilized by field cool- PRB 59, AND POKROVSKY ing. Inset: M (T) in 19.7 kOe for increasing ~s! and decreasing temperature ~j!. O given...

  1. Hydrodynamic radial and elliptic flow in heavy-ion collisions from AGS to LHC energies

    E-Print Network [OSTI]

    Gregory Kestin; Ulrich W Heinz

    2008-11-28T23:59:59.000Z

    Using ideal relativistic hydrodynamics in 2+1 dimensions, we study the collision energy dependence of radial and elliptic flow, of the emitted hadron spectra, and of the transverse momentum dependence of several hadronic particle ratios, covering the range from Alternating Gradient Synchrotron (AGS) to Large Hadron Collider (LHC) energies. These calculations establish an ideal fluid dynamic baseline that can be used to assess non-equilibrium features manifest in future LHC heavy-ion experiments. Contrary to earlier suggestions we find that a saturation and even decrease of the differential elliptic flow v_2(p_T) with increasing collision energy cannot be unambiguously associated with the QCD phase transition.

  2. Rapidity losses in heavy-ion collisions from AGS to RHIC energies

    E-Print Network [OSTI]

    F. C. Zhou; Z. B. Yin; D. C. Zhou

    2009-09-28T23:59:59.000Z

    We study the rapidity losses in central heavy-ion collisions from AGS to RHIC energies with the mean rapidity determined from the projectile net-baryon distribution after collisions. The projectile net-baryon distribution in the full rapidity range was obtained by removing the target contribution phenomenologically at forward rapidity region from the experimental net-baryon measurements and taking into account the projectile contribution at backward rapidity region. Based on the full projectile net-baryon distributions, calculation results show that the rapidity loss stops increasing from the SPS top energy to RHIC energies, indicating that baryon transport does not depend strongly on energy at high energies.

  3. AN UPGRADE OF MAGNET-FIELD-DRIVEN TIMING SYSTEMS AT THE AGS.

    SciTech Connect (OSTI)

    TIAN, Y.; OERTER, B.

    2005-10-10T23:59:59.000Z

    An upgrade of the main magnet-field-driven timing systems at Brookhaven National Laboratory's Alternating Gradient Synchrotron (AGS) and Booster accelerators will be described in this paper. A novel approach using content addressable memory (CAM) is applied to overcome a weakness in the previous systems, which required a reproducible dwell field for proper operation. Upgraded from a multibus-based system to a VME-based system, the new timing system also proves easier to maintain and to diagnose. Details of the system architecture, as well as its application in other timing systems will be discussed.

  4. Compton-profile measurements for W, Ag, and Cu with 662-keV. gamma. rays

    SciTech Connect (OSTI)

    Heller, M.V.; Moreira, J.R.

    1986-04-01T23:59:59.000Z

    The Compton profiles of W, Ag, and Cu were measured for three scattering angles (30/sup 0/, 15/sup 0/, and 10/sup 0/) using /sup 137/Cs ..gamma.. rays. A Monte Carlo simulation was used to reproduce the experimental situation. Double-scattering events are considered in the simulation and subtracted from the single profile when necessary. Good accordance with the theoretical momentum distribution of the electron cloud was observed when relativistic wave functions quoted by Mendelsohn, Biggs, and Mann are used. This accordance was achieved only when the Ribberfors correction of the Compton profile was considered.

  5. Phoenix Solar AG formerly Phoenix SonnenStrom | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual SiteofEvaluatingGroupPerfectenergy International LimitedPhoenix Bio IndustriesPhoenix Solar AG

  6. Sovello AG formerly EverQ GmbH | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro Industries Pvt LtdShawangunk,Southeast Colorado PowerSouthwestern PublicSovello AG formerly

  7. Deutsche Solar AG formerly Bayer Solar GmbH | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand JumpConceptual Model,DOE Facility DatabaseMichigan: EnergyKansas:Detroit Beach,South Dakota:EnergyAG

  8. Structural and optical properties of coreshell Ag{sub 2}S/HgS nanostructures

    SciTech Connect (OSTI)

    Basyach, Priyanka; Choudhury, Amarjyoti, E-mail: ajc@tezu.ernet.in

    2013-07-15T23:59:59.000Z

    Graphical abstract: - Highlights: Coreshell Ag{sub 2}S/HgS nanostructures are successfully synthesized. The particle size and the structure were confirmed through TEM images. The absorbance analysis reveals red shift with increasing shell concentration. A transition from TYPE 1 to TYPE 2 coreshell nanostructure is observed. - Abstract: Here we report on a two-step synthesis route for fabrication of coreshell Ag{sub 2}S/HgS nanostructures. Nanoscale Ag{sub 2}S semiconductors are prepared by a standard redox reaction using AgNO{sub 3} and CS{sub 2} as the reactants in PVP. HgS layers are developed on Ag{sub 2}S cores through S-S bonding at the interface separating the two systems. The properties of these coreshell nanostructures are studied via various spectroscopic and microscopic tools like UVVis absorption spectra, photoluminescence spectra, X-ray diffraction pattern and transmission electron microscopic images. Change in optical properties is observed while varying the shell thickness in the sample. A detailed study on the luminescence properties reveal transition from TYPE 1 to TYPE 2 coreshell nanostructures is observed with increasing shell thickness.

  9. Scanning mid-IR-laser microscopy: an efficient tool for materials studies in silicon-based photonics and photovoltaics

    E-Print Network [OSTI]

    Astafiev, O V; Yuryev, V A; 10.1016/S0022-0248(99)00711-3

    2011-01-01T23:59:59.000Z

    A method of scanning mid-IR-laser microscopy has recently been proposed for the investigation of large-scale electrically and recombination-active defects in semiconductors and non-destructive inspection of semiconductor materials and structures in the industries of microelectronics and photovoltaics. The basis for this development was laid with a wide cycle of investigations on low-angle mid-IR-light scattering in semiconductors. The essence of the technical idea was to apply the dark-field method for spatial filtering of the scattered light in the scanning mid-IR-laser microscope together with the local photoexcitation of excess carriers within a small domain in a studied sample, thus forming an artificial source of scattering of the probe IR light for the recombination contrast imaging of defects. The current paper presents three contrasting examples of application of the above technique for defect visualization in silicon-based materials designed for photovoltaics and photonics which demonstrate that this...

  10. PECULIAR OPTICAL AND IR BEHAVIOUR IN TYPE I SUPERNOVAE, AND THE ORIGIN OF THE 1.2 ABSORPTION

    E-Print Network [OSTI]

    Graham, J.R.

    2011-01-01T23:59:59.000Z

    Wheeler, le. , 1984. In "Supernovae as distance indicators",lR. , 1985. In "Dust in supernovae and supernova remnants",and IR behaviour in type I supernovae, and the origin of the

  11. High-pressure dissociation of silver mercury iodide, Ag{sub 2}HgI{sub 4}

    SciTech Connect (OSTI)

    Parfitt, D.C. [Department of Physics, Oxford University, Parks Road, Oxford OX1 3PU (United Kingdom); Hull, S. [ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, OX11 0QX (United Kingdom)]. E-mail: s.hull@rl.ac.uk; Keen, D.A. [Department of Physics, Oxford University, Parks Road, Oxford OX1 3PU (United Kingdom); ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, OX11 0QX (United Kingdom); Crichton, W. [ESRF, 6 Rue Jules Horowitz, BP 220, 38043 Grenoble CEDEX 9 (France)

    2004-10-01T23:59:59.000Z

    High-pressure X-ray diffraction has been used to probe the behavior of the superionic conductor silver mercury iodide (Ag{sub 2}HgI{sub 4}) at pressures up to 5GPa and at temperatures from 295 to 370K. Significant changes in the diffraction spectra, indicative of structural transitions, are observed around 0.7 and 1.3GPa across the range of temperatures studied. The change at 0.7GPa is shown to correspond to the dissociation of silver mercury iodide into silver iodide and mercury iodide, i.e., Ag{sub 2}HgI{sub 4}->2AgI+HgI{sub 2}. The second transition, at 1.3GPa, is due to a structural phase transition within HgI{sub 2}. Rietveld analysis of the diffraction data is used to confirm and refine all the known crystal structures.

  12. EFFECT OF IMPURITIES ON THE PERFORMANCE OF A Pd-Ag DIFFUSER

    SciTech Connect (OSTI)

    Morgan, G.

    2010-12-16T23:59:59.000Z

    A commercially fabricated diffuser purchased from Johnson-Matthey, Inc. was evaluated for performance characterization testing at the Savannah River National Laboratory (SRNL). Different impurities are often present in the feed streams of the process diffusers, but the effect of these impurities on the diffuser performance is currently unknown. Various impurities were introduced into the feed stream of the diffuser at various levels ranging from 0.5% to 10% of the total flow in order to determine the effect that these impurities have on the permeation of hydrogen through the palladium-silver membrane. The introduction of various impurities into the feed stream of the diffuser had a minimal effect on the overall permeation of hydrogen through the Pd-Ag membrane. Of the four impurities introduced into the feed stream, carbon monoxide (CO) was the only impurity that showed any evidence of causing a reduction in the amount of hydrogen permeating through the Pd-Ag membrane. The hydrogen permeation returned to its baseline level after the CO was removed from the feed stream. There were no lasting effects of the CO exposure on the ability of the membrane to effectively separate hydrogen from the non-hydrogen species in the gas stream under the conditions tested.

  13. Morphological instability of Ag films caused by phase transition in the underlying Ta barrier layer

    SciTech Connect (OSTI)

    Mardani, Shabnam, E-mail: shabnam.mardani@angstrom.uu.se; Vallin, rjan; Wtjen, Jrn Timo; Norstrm, Hans; Olsson, Jrgen; Zhang, Shi-Li, E-mail: shili.zhang@angstrom.uu.se [Solid State Electronics, The ngstrm Laboratory, Uppsala University, P.O. Box 534, SE-75121 (Sweden)

    2014-08-18T23:59:59.000Z

    Wide-bandgap (WBG) semiconductor technologies are maturing and may provide increased device performance in many fields of applications, such as high-temperature electronics. However, there are still issues regarding the stability and reliability of WBG devices. Of particular importance is the high-temperature stability of interconnects for electronic systems based on WBG-semiconductors. For metallization without proper encapsulation, morphological degradation can occur at elevated temperatures. Sandwiching Ag films between Ta and/or TaN layers in this study is found to be electrically and morphologically stabilize the Ag metallization up to 800?C, compared to 600?C for uncapped films. However, the barrier layer plays a key role and TaN is found to be superior to Ta, resulting in the best achieved stability, whereas the difference between Ta and TaN caps is negligible. The ?-to-? phase transition in the underlying Ta barrier layer is identified as the major cause responsible for the morphological instability observed above 600?C. It is shown that this phase transition can be avoided using a stacked Ta/TaN barrier.

  14. Process control techniques at the blast furnaces of Thyssen Stahl AG

    SciTech Connect (OSTI)

    Kowalski, W.; Bachhofen, H.J.; Beppler, E.; Kreibich, K.; Muelheims, K.; Peters, M.; Wieters, C.U. [Thyssen Stahl AG, Duisburg (Germany)

    1995-12-01T23:59:59.000Z

    Process improvements, capacity increases and the use of modern measuring and process control techniques have helped to ensure that the blast furnace will remain an indispensable means of supplying steelworks with hot metal until well into the next century. The survival of a future-oriented company such as Thyssen Stahl AG depends on long-term improvements in economic viability. Today, Thyssen Stahl AG operates two blast furnace plants comprising a total of five blast furnaces with hearth diameters ranging from 9.3 to 14.9m. This choice of furnaces permits flexible adjustment to changing workload situations and enables about ten million tons of hot metal to be produced each year. The wide range of measuring devices specially fitted on Schwelgern blast furnace No. 1 made a vital contribution to the development of blast furnace models. The purpose of these models was to make a general assessment of the state of the furnace and so create an objective basis for furnace operation. The paper describes the development of these measuring techniques and process model and the application of the model.

  15. Role of surface states in Auger neutralization of He{sup +} ions on Ag surfaces

    SciTech Connect (OSTI)

    Sarasola, A.; Silkin, V. M.; Arnau, A. [Fisika Aplikatua I Saila, Unibertsitate Eskola Politeknikoa, UPV/EHU, Europa Plaza 1, 20018 Donostia (Spain); Donostia International Physics Center (DIPC), Manuel de Lardizabal pasealekua 4, 20018 Donostia (Spain); Materialen Fisika Saila, Kimika Fakultatea, UPV/EHU and Centro Mixto CSIC-UPV/EHU, 1072 Posta Kutxatila, 20080 Donostia (Spain)

    2007-01-15T23:59:59.000Z

    Recent measurements of He{sup +} ion fractions that survive to a whole scatterig event when they impinge on Ag surfaces have shown two different and interesting effects: (1) a notable difference of surviving ion fraction depending on which crystallographic face of the target surface is studied [Yu. Bandurin et al., Phys. Rev. Lett. 92, 017601 (2004)], and (2) an uncommonly high ion fraction in the very-low-energy range (tens of eV) [S. Wethekam et al., Phys. Rev. Lett. 90, 037602 (2003)]. Apart from the geometry, one of the differences between the surfaces of a crystal can be seen in the electronic structure: while the (111) surface has an occupied surface state near the Fermi level at the {gamma} point the (110) and (100) faces have not. Motivated by these facts, in this work we study the role that the occupied surface state plays on the Auger neutralization rate and we present an estimation of the ion fractions that survive for the different Ag faces.

  16. Frying Doughnuts: What can the reprocessing of X-rays to IR tell us about the AGN environment?

    E-Print Network [OSTI]

    B. McKernan; K. E. S. Ford; N. Chang; C. S. Reynolds

    2008-12-04T23:59:59.000Z

    Active galactic nuclei (AGN) produce vast amounts of high energy radiation deep in their central engines. X-rays either escape the AGN or are absorbed and re-emitted mostly as IR. By studying the dispersion in the ratio of observed mid-IR luminosity to observed 2-10keV X-ray luminosity (R_{ir/x}) in AGN we can investigate the reprocessing material (possibly a torus or donut of dust) in the AGN central engine, independent of model assumptions. We studied the ratio of observed mid-IR and 2-10keV X-ray luminosities in a heterogeneous sample of 245 AGN from the literature. We found that when we removed AGN with prominent jets, ~90% of Type I AGN lay within a very tight dispersion in luminosity ratio (1cloud cover, turbulent disk, opening angle of absorbing structures such as dusty tori) must span a very narrow range of parameters. We also found that the far-IR(100um) to mid-IR (12um) observed luminosity ratio is an effective descriminator between heavily obscured AGN and relatively unobscured AGN.

  17. Book Editors IOS Press, 2003

    E-Print Network [OSTI]

    . The ontology is constructed by extracting terms and relations from existing documents. Applying text mining for ontology extraction has an unbeatable advantage compared to man- ual ontology extraction: Text mining in different places "water level measurement device", "water level mea- suring unit", "device to measure

  18. I/O impedance controller

    DOE Patents [OSTI]

    Ruesch, Rodney; Jenkins, Philip N.; Ma, Nan

    2004-03-09T23:59:59.000Z

    There is disclosed apparatus and apparatus for impedance control to provide for controlling the impedance of a communication circuit using an all-digital impedance control circuit wherein one or more control bits are used to tune the output impedance. In one example embodiment, the impedance control circuit is fabricated using circuit components found in a standard macro library of a computer aided design system. According to another example embodiment, there is provided a control for an output driver on an integrated circuit ("IC") device to provide for forming a resistor divider network with the output driver and a resistor off the IC device so that the divider network produces an output voltage, comparing the output voltage of the divider network with a reference voltage, and adjusting the output impedance of the output driver to attempt to match the output voltage of the divider network and the reference voltage. Also disclosed is over-sampling the divider network voltage, storing the results of the over sampling, repeating the over-sampling and storing, averaging the results of multiple over sampling operations, controlling the impedance with a plurality of bits forming a word, and updating the value of the word by only one least significant bit at a time.

  19. Book Editors IOS Press, 2003

    E-Print Network [OSTI]

    Cook, Diane J.

    of this work is to design techniques for using agent-based smart home technologies to provide this at-home assistance system. We discuss one such smart environment implementa- tion in the MavHome project and present such environ- ments. Here we discuss methods by which we can adapt a smart home environment such as MavHome

  20. I/O Case Studies

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Science (SC) EnvironmentalGyroSolé(tm)Hydrogen Storage inChang Curriculum Vitae' IPublicI.Darshan

  1. PDSF I/O Monitoring

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Science (SC)IntegratedSpeeding access toTest andOptimize832 2.860 2.864 2.867039 JEmail ATLASPDSF

  2. PDSF I/O Resources

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Science (SC)IntegratedSpeeding access toTest andOptimize832 2.860 2.864 2.867039 JEmail

  3. SC11-IO.pptx

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's PossibleRadiation Protection245C Unlimited Release Printed March 2012B.WorkshopWebsiteOpenHick2

  4. SC11-IO.pptx

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's PossibleRadiation Protection245C Unlimited Release Printed March 2012B.WorkshopWebsiteOpenHick2*

  5. AgNIC 20th Annual Meeting 2015 "LibGuides for All with Open Access Resources"

    E-Print Network [OSTI]

    McGeachin, Bobert B.

    2015-05-01T23:59:59.000Z

    LibGuides for All with Open Access Resources Dr. Rob McGeachin 20th Annual AgNIC Meeting May 6, 2015 AgNIC Agribusiness LibGuide Repurpose a LibGuide to Another Use Easy to copy whole LibGuide and modify for another audience Copy... with content linked to original so updating the base guide corrects in child guides Both are public audiences so only include OA agricultural resources New guide aimed at high school students doing agricultural research papers Roscoe ISD STEM Rural...

  6. Nanospherical-lens lithographical Ag nanodisk arrays embedded in p-GaN for localized surface plasmon-enhanced blue light emitting diodes

    SciTech Connect (OSTI)

    Wei, Tongbo, E-mail: tbwei@semi.ac.cn; Wu, Kui; Sun, Bo; Zhang, Yonghui; Chen, Yu; Huo, Ziqiang; Hu, Qiang; Wang, Junxi; Zeng, Yiping; Li, Jinmin [State Key Laboratory of Solid-State Lighting, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083 (China); Lan, Ding [National Microgravity Laboratory, Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100080 (China)

    2014-06-15T23:59:59.000Z

    Large-scale Ag nanodisks (NDs) arrays fabricated using nanospherical-lens lithography (NLL) are embedded in p-GaN layer of an InGaN/GaN light-emitting diode (LED) for generating localized surface plasmon (LSP) coupling with the radiating dipoles in the quantum-well (QWs). Based on the Ag NDs with the controlled surface coverage, LSP leads to the improved crystalline quality of regrowth p-GaN, increased photoluminescence (PL) intensity, reduced PL decay time, and enhanced output power of LED. Compared with the LED without Ag NDs, the optical output power at a current of 350 mA of the LSP-enhanced LEDs with Ag NDs having a distance of 20 and 35 nm to QWs is increased by 26.7% and 31.1%, respectively. The electrical characteristics and optical properties of LEDs with embedded Ag NPs are dependent on the distance of between Ag NPs and QWs region. The LED with Ag NDs array structure is also found to exhibit reduced emission divergence, compared to that without Ag NDs.

  7. Siemens-ZIB Scholarship Program Policy The Siemens AG and the Konrad-Zuse-Zentrum fr Informationstechnik Berlin (ZIB) -in the

    E-Print Network [OSTI]

    Andrzejak, Artur

    Siemens-ZIB Scholarship Program Policy The Siemens AG and the Konrad-Zuse-Zentrum fr Hofmeister on the part of Siemens and Prof. Dr. Dr. h.c. mult. Martin Grtschel on the part of ZIB of two years, which can be extended by one more year. The scholarship holders are supported by Siemens AG

  8. Do Ag{sub n} (up to n = 8) clusters retain their identity on graphite? Insights from first-principles calculations including dispersion interactions

    SciTech Connect (OSTI)

    Singh, Akansha; Sen, Prasenjit, E-mail: prasen@hri.res.in [Harish-Chandra Research Institute, Chhatnag Road, Jhunsi, Allahabad 211019 (India)] [Harish-Chandra Research Institute, Chhatnag Road, Jhunsi, Allahabad 211019 (India); Majumder, Chiranjib [Chemistry Division, Bhabha Atomic Research Center, Trombay, Mumbai 400085 (India)] [Chemistry Division, Bhabha Atomic Research Center, Trombay, Mumbai 400085 (India)

    2014-04-28T23:59:59.000Z

    Adsorption of pre-formed Ag{sub n} clusters for n = 1 ? 8 on a graphite substrate is studied within the density functional theory employing the vdW-DF2 functional to treat dispersion interactions. Top sites above surface layer carbon atoms turn out to be most favorable for a Ag adatom, in agreement with experimental observations. The same feature is observed for clusters of almost all sizes which have the lowest energies when the Ag atoms are positioned over top sites. Most gas phase isomers retain their structures over the substrate, though a couple of them undergo significant distortions. Energetics of the adsorption can be understood in terms of a competition between energy cost of disturbing AgAg bonds in the cluster and energy gain from AgC interactions at the surface. Ag{sub 3} turns out to be an exceptional candidate in this regard that undergoes significant structural distortion and has only two of the Ag atoms close to surface C atoms in its lowest energy structure.

  9. Timing the Last Irrigation Using COTMAN in a LEPA Irrigation System at AG-CARES, Lamesa, Tommy Doederlein, Texas Cooperative Extension, Lamesa, Texas, Brant Baugh, Randy Boman

    E-Print Network [OSTI]

    Mukhtar, Saqib

    TITLE: Timing the Last Irrigation Using COTMAN in a LEPA Irrigation System at AG-CARES, Lamesa, TX past cutout in a LEPA irrigation system. AG-CARES Farm, Lamesa, Texas. 2003. Target HU Accumulation with four replications Plot size: 8 rows by 180 feet Planting Date: May 8 Variety: PM2628RR Irrigation: LEPA

  10. WATER ICE IN HIGH MASS-LOSS RATE OH/IR STARS

    SciTech Connect (OSTI)

    Suh, Kyung-Won; Kwon, Young-Joo, E-mail: kwsuh@chungbuk.ac.kr [Department of Astronomy and Space Science, Chungbuk National University, Cheongju-City 361-763 (Korea, Republic of)] [Department of Astronomy and Space Science, Chungbuk National University, Cheongju-City 361-763 (Korea, Republic of)

    2013-01-10T23:59:59.000Z

    We investigate water-ice features in spectral energy distributions (SEDs) of high mass-loss rate OH/IR stars. We use a radiative transfer code which can consider multiple components of dust shells to make model calculations for various dust species including water ice in the OH/IR stars. We find that the model SEDs are sensitively dependent on the location of the water-ice dust shell. For two sample stars (OH 127.8+0.0 and OH 26.5+0.6), we compare the detailed model results with the infrared observational data including the spectral data from the Infrared Space Observatory (ISO). For the two sample stars, we reproduce the crystalline water-ice features (absorption at 3.1 {mu}m and 11.5 {mu}m; emission at 44 and 62 {mu}m) observed by ISO using a separate component of the water-ice dust shell that condensed at about 84-87 K (r {approx} 1500-1800 AU) as well as the silicate dust shell that condensed at about 1000 K (r {approx} 19-25 AU). For a sample of 1533 OH/IR stars, we present infrared two-color diagrams (2CDs) using the Infrared Astronomical Satellite and AKARI data compared with theoretical model results. We find that the theoretical models clearly show the effects of the crystalline water-ice features (absorption at 11.5 {mu}m and emission at 62 {mu}m) on the 2CDs.

  11. Integrating Interactive Visualizations in the Search Process of Digital Libraries and IR Systems

    E-Print Network [OSTI]

    Hienert, Daniel; Schaer, Philipp; Mayr, Philipp

    2012-01-01T23:59:59.000Z

    Interactive visualizations for exploring and retrieval have not yet become an integral part of digital libraries and information retrieval systems. We have integrated a set of interactive graphics in a real world social science digital library. These visualizations support the exploration of search queries, results and authors, can filter search results, show trends in the database and can support the creation of new search queries. The use of weighted brushing supports the identification of related metadata for search facets. We discuss some use cases of the combination of IR systems and interactive graphics. In a user study we verify that users can gain insights from statistical graphics intuitively and can adopt interaction techniques.

  12. Bismuth-doped optical fibres: A new breakthrough in near-IR lasing media

    SciTech Connect (OSTI)

    Dianov, Evgenii M [Fiber Optics Research Center, Russian Academy of Sciences, Moscow (Russian Federation)

    2012-09-30T23:59:59.000Z

    Recent results demonstrate that bismuth-doped optical fibres have considerable potential as near-IR active lasing media. This paper examines bismuth-doped fibres intended for the fabrication of fibre lasers and optical amplifiers and reviews recent results on the luminescence properties of various types of bismuth-doped fibres and the performance of bismuth-doped fibre lasers and optical amplifiers for the spectral range 1150 - 1550 nm. Problems are discussed that have yet to be solved in order to improve the efficiency of the bismuth lasers and optical amplifiers. (optical fibres, lasers and amplifiers. properties and applications)

  13. Phase-matched generation of coherent soft and hard X-rays using IR lasers

    DOE Patents [OSTI]

    Popmintchev, Tenio V.; Chen, Ming-Chang; Bahabad, Alon; Murnane, Margaret M.; Kapteyn, Henry C.

    2013-06-11T23:59:59.000Z

    Phase-matched high-order harmonic generation of soft and hard X-rays is accomplished using infrared driving lasers in a high-pressure non-linear medium. The pressure of the non-linear medium is increased to multi-atmospheres and a mid-IR (or higher) laser device provides the driving pulse. Based on this scaling, also a general method for global optimization of the flux of phase-matched high-order harmonic generation at a desired wavelength is designed.

  14. Macroscopic screening of 1/r potentials from UV/IR-mixing

    E-Print Network [OSTI]

    Helling, Robert C

    2008-01-01T23:59:59.000Z

    We compute the static potential in a non-commutative theory including a term due to UV/IR-mixing. As a result, the potential decays exponentially fast with distance rather than like a power law Coulomb type potential due to the exchange of massless particles. This shows that when quantum effects are taken into account the introduction of non-commutativity not only modifies physics at short distances but has dramatic macroscopic consequences as well. As a result, we give a lower bound on the scale of non-commutativity (if present at all) to be compatible with observations.

  15. UV and IR laser ablation for inductively coupled plasma mass spectrometry

    SciTech Connect (OSTI)

    Smith, M.R.; Koppenaal, D.W.; Farmer, O.T.

    1993-06-01T23:59:59.000Z

    Laser ablation particle plume compositions are characterized using inductively coupled plasma mass spectrometry (ICP/MS). This study evaluates the mass response characteristics peculiar to ICP/MS detection as a function of laser fluence and frequency. Evaluation of the ICP/MS mass response allows deductions to be made concerning how representative the laser ablation produced particle plume composition is relative to the targeted sample. Using a black glass standard, elemental fractionation was observed, primarily for alkalis and other volatile elements. The extent of elemental fractionation between the target sample and the sampled plume varied significantly as a function of laser fluences and IR and UV laser frequency.

  16. An Optical Offgas Sensor Network Incorporating a HG Cavity Ringdown Spectrometer and IR Diode Lasers

    SciTech Connect (OSTI)

    George P. Miller

    2007-12-30T23:59:59.000Z

    A multi-element cavity ringdown system was evaluated with the objective of developing an intelligent sensor network to be incorporated into the control systems for advanced coal combustion facilities. Using a combination of a YAG-pumped dye laser and a tunable NIR/IR laser a dual cavity was constructed and a labview program was developed to provide multi-channel, real-time data to permit the real-time monitoring of typical exhaust emission gases, (for example: CO{sub 2}, SO{sub 2}, and mercury) of concern to the next generation of coal-powered facilities.

  17. Observations of the 6 Centimeter Lines of OH in Evolved (OH/IR) Stars

    E-Print Network [OSTI]

    Vincent L. Fish; Laura K. Zschaechner; Lornt O. Sjouwerman; Ylva M. Pihlstrm; Mark J. Claussen

    2006-10-24T23:59:59.000Z

    Recent observational and theoretical advances have called into question traditional OH maser pumping models in evolved (OH/IR) stars. The detection of excited-state OH lines would provide additional constraints to discriminate amongst these theoretical models. In this Letter, we report on VLA observations of the 4750 MHz and 4765 MHz lines of OH toward 45 sources, mostly evolved stars. We detect 4765 MHz emission in the star forming regions Mon R2 and LDN 1084, but we do not detect excited-state emission in any evolved stars. The flux density and velocity of the 4765 MHz detection in Mon R2 suggests that a new flaring event has begun.

  18. Mechanistic Investigation of Ethanol SCR of NOx over Ag/Al2O3

    SciTech Connect (OSTI)

    Johnson, William L [ORNL; Fisher, Galen [University of Michigan; Toops, Todd J [ORNL

    2012-01-01T23:59:59.000Z

    A 2 wt.% Ag/{gamma}-Al{sub 2}O{sub 3} catalyst was studied for the ethanol selective catalytic reduction of NO{sub x} from 200 to 550 C and space velocities between 30,000 h{sup -1} and 140,000 h{sup -1}. Peak NO{sub x} conversions reached 85% at 400 C, and an activation energy was determined to be 57 kJ/mol with a feed of ethanol to NO{sub x} or HC{sub 1}/NO{sub x} = 3. Up to 80% of the NO is oxidized to NO{sub 2} at 250 C, but overall NO{sub x} conversion is only 15%. Interestingly, ethanol oxidation occurs at much lower temperatures than NO{sub x} reduction; at 250 C, ethanol oxidation is 80% when flowing ethanol + NO + O{sub 2}. This increased reactivity, compared to only 15% when flowing only ethanol + O{sub 2}, combined with the observation that NO is not oxidized to NO{sub 2} in the absence of ethanol illustrates a synergistic relationship between the reactants. To further investigate this chemistry, a series of DRIFTS experiments were performed. To form nitrates/nitrites on the catalysts it was necessary to include ethanol in the feed with NO. These nitrates/nitrites were readily formed when flowing NO{sub 2} over the catalyst. It is proposed that ethanol adsorbs through an ethoxy-intermediate that results in atomic hydrogen on the surface. This hydrogen aids the release of NO{sub 2} from Ag to the gas-phase which, can be subsequently adsorbed at {gamma}-Al{sub 2}O{sub 3} sites away from Ag. The disappearance of these nitrates/nitrites at higher temperatures proceeds in parallel with the increase in NO{sub x} reduction reactivity between 300 and 350 C observed in the kinetic study. It is therefore proposed that the consumption of nitrates is involved in the rate determining step for this reaction.

  19. The 22nd International Photovoltaic Science and Engineering Conference, November 05-09, 2012, Hangzhou, China Now with Siemens AG, Otto-Hahn-Ring 6, D-81739 Munich, GERMANY

    E-Print Network [OSTI]

    , Hangzhou, China a Now with Siemens AG, Otto-Hahn-Ring 6, D-81739 Munich, GERMANY Reconditioning of silicon

  20. Ag:TiN NANOCOMPOSITE THIN FILMS FOR DRY EEG BIO-ELECTRODES P. Pedrosa1,2,3

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Ag:TiN NANOCOMPOSITE THIN FILMS FOR DRY EEG BIO-ELECTRODES P. Pedrosa1,2,3 , C. Lopes3 , D their potential application as EEG bio-electrodes. The coatings were characterized regarding their composition to the common used gel pastes [3] and the risk of short-circuiting adjacent electrodes due to gel running can be

  1. Simple Vapor-Phase Synthesis of Single-Crystalline Ag Nanowires and Single-Nanowire Surface-Enhanced Raman Scattering

    E-Print Network [OSTI]

    Ihee, Hyotcherl

    in. diameter horizontal quartz tube furnace. The NWs were grown at a few centimeters downstream from downstream by the flow of 500 sccm of Ar at 5-10 Torr to a lower temperature zone (T2 ) 500 C), where Ag NWs

  2. High efficiency single Ag nanowire/p-GaN substrate Schottky junction-based ultraviolet light emitting diodes

    E-Print Network [OSTI]

    Wu, Y.; Hasan, T.; Li, X.; Xu, P.; Wang, Y.; Shen, X.; Liu, X.; Yang, Q.

    2015-02-05T23:59:59.000Z

    We report a high efficiency single Ag nanowire (NW)/p-GaN substrate Schottky junction-based ultraviolet light emitting diode (UV-LED). The device demonstrates deep UV free exciton electroluminescence at 362.5?nm. The dominant emission, detectable...

  3. Performance of Titanium-Oxide/Polymer Insulation in Bi-2212/Ag-alloy Round Wire Wound Superconducting Coils

    E-Print Network [OSTI]

    Peng Chen; Ulf P Trociewitz; Matthieu Dalban-Canassy; Jianyi Jiang; Eric E Hellstrom; David C Larbalestier

    2013-03-20T23:59:59.000Z

    Conductor insulation is one of the key components needed to make Ag-alloy clad Bi2Sr2CaCu2O8+x (Bi-2212/Ag) superconducting round wire (RW) successful for high field magnet applications as dielectric standoff and high winding current densities (Jw) directly depend on it. In this study, a TiO2/polymer insulation coating developed by nGimat LLC was applied to test samples and a high field test coil. The insulation was investigated by differential thermal analysis (DTA), thermo-gravimetric analysis (TGA), scanning electron microscopy (SEM), dielectric properties measurement, and transport critical current (Ic) properties measurement. About 29% of the insulation by weight is polymer. When the Bi-2212/Ag wire is full heat treated, this decomposes with slow heating to 400{\\deg}C in pure O2. After the full reaction, we found that the TiO2 did not degrade the critical current properties, adhered well to the conductor, and provided a breakdown voltage of >100 V, which allowed the test coil to survive quenching in 31.2 T background field, while providing a 2.6 T field increment. For Bi-2212/Ag RW with a typical diameter of 1.0-1.5 mm, this ~15 um thick insulation allows a very high coil packing factor of ~0.74, whereas earlier alumino-silicate braid insulation only allows packing factors of 0.38-0.48.

  4. Stacking-fault energies for Ag, Cu, and Ni from empirical tight-binding potentials and L. J. Lewis

    E-Print Network [OSTI]

    Entel, P.

    , Canada (Dated: July 12, 2002) The intrinsic stacking-fault energies and free energies for Ag, Cu, and Ni and thermal properties of fcc metals. In this work we study the intrinsic stacking-fault energies and free the stacking-fault free energies within the quasiharmonic approximation and to study the local effect

  5. Ag Business Student professional@yahoo.com 201 Harmony Ave. Apt.#3 Ft. Collins, CO (970) 123-4567

    E-Print Network [OSTI]

    Ag Business Student professional@yahoo.com 201 Harmony Ave. Apt.#3 Ft. Collins, CO (970) 123-4567 EDUCATION Colorado State University Ft. Collins, CO Anticipated May 2012 Dual Bachelor of Science in Animal Science and Agricultural Business Aims Community College Loveland, CO 2007 Associates of Science RELEVANT

  6. Plasma-Induced Formation of Ag Nanodots for Ultra-High-Enhancement Surface-Enhanced Raman Scattering

    E-Print Network [OSTI]

    New Mexico, University of

    . Li and S. R. J. Brueck Center for High Technology Materials, UniVersity of New Mexico, Albuquerque, New Mexico 87106 ReceiVed December 20, 2006. In Final Form: February 13, 2007 We report here plasma the patterned structures into clusters of smaller, interconnected, closely packed Ag nanoparticles (20-60 nm

  7. AgNIC Pre-conference 2011 If Its Digital and In Google Then They Will Come

    E-Print Network [OSTI]

    McGeachin, Robert B.

    2011-05-17T23:59:59.000Z

    AgNIC offers a two hour pre-conference on how to scan and digitize print items, make derivative versions, including archival PDF/A, for easy access on the Internet, create basic Dublin Core metadata, and how to add digital objects to a digital...

  8. Le gisement Ag Hg de Zgounder (Jebel Siroua, Anti-Atlas, Maroc) : un pithermal noprotrozoque de type

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Le gisement Ag Hg de Zgounder (Jebel Siroua, Anti- Atlas, Maroc) : un épithermal néoprotérozoïque Compagnie minière de Touissit (CMT), 279, bd Zerktouni, Casablanca, Maroc Abstract The Zgounder ore deposit and more as a silver metallogenic province Résumé Le gisement argentifère de Zgounder (Anti-Atlas, Maroc

  9. Anharmonic lattice dynamics of Ag2O studied by inelastic neutron scattering and first-principles molecular dynamics simulations

    SciTech Connect (OSTI)

    Lan, Tian [California Institute of Technology, Pasadena] [California Institute of Technology, Pasadena; Li, Chen [ORNL] [ORNL; Niedziela, Jennifer L [ORNL] [ORNL; Smith, Hillary [California Institute of Technology, Pasadena] [California Institute of Technology, Pasadena; Abernathy, Douglas L [ORNL] [ORNL; Rossman, George [California Institute of Technology, Pasadena] [California Institute of Technology, Pasadena; Fultz, B. [California Institute of Technology, Pasadena] [California Institute of Technology, Pasadena

    2014-01-01T23:59:59.000Z

    Inelastic neutron scattering measurements on silver oxide (Ag2O) with the cuprite structure were performed at temperatures from 40 to 400 K, and Fourier transform far-infrared spectra were measured from 100 to 300 K. The measured phonon densities of states and the infrared spectra showed unusually large energy shifts with temperature, and large linewidth broadenings. First principles molecular dynamics (MD) calculations were performed at various temperatures, successfully accounting for the negative thermal expansion (NTE) and local dynamics. Using the Fourier-transformed velocity autocorrelation method, the MD calculations reproduced the large anharmonic effects of Ag2O, and were in excellent agreement with the neutron scattering data. The quasiharmonic approximation (QHA) was less successful in accounting for much of the phonon behavior. The QHA could account for some of the NTE below 250 K, although not at higher temperatures. Strong anharmonic effects were found for both phonons and for the NTE. The lifetime broadenings of Ag2O were explained by anharmonic perturbation theory, which showed rich interactions between the Ag-dominated modes and the O-dominated modes in both up- and down-conversion processes.

  10. CONTENT ANR @ MSU AgBioResearch One Hundred Years of Bean Breeding at Michigan State University: A

    E-Print Network [OSTI]

    SKIP TO CONTENT ANR @ MSU AgBioResearch Home Bean Info Beet Info Directions History InfoVideos Links One Hundred Years of Bean Breeding at Michigan State University: A Chronology by James D. Kelly it would be interesting to summarize the milestones achieved in bean breeding over the last century. All

  11. Sonic IR crack detection of aircraft turbine engine blades with multi-frequency ultrasound excitations

    SciTech Connect (OSTI)

    Zhang, Ding; Han, Xiaoyan [Department of Electrical and Computer Engineering, Wayne State University, Detroit, MI 48202 (United States); Newaz, Golam [Department of Mechanical Engineering, Wayne State University, Detroit, MI 48202 (United States)

    2014-02-18T23:59:59.000Z

    Effectively and accurately detecting cracks or defects in critical engine components, such as turbine engine blades, is very important for aircraft safety. Sonic Infrared (IR) Imaging is such a technology with great potential for these applications. This technology combines ultrasound excitation and IR imaging to identify cracks and flaws in targets. In general, failure of engine components, such as blades, begins with tiny cracks. Since the attenuation of the ultrasound wave propagation in turbine engine blades is small, the efficiency of crack detection in turbine engine blades can be quite high. The authors at Wayne State University have been developing the technology as a reliable tool for the future field use in aircraft engines and engine parts. One part of the development is to use finite element modeling to assist our understanding of effects of different parameters on crack heating while experimentally hard to achieve. The development has been focused with single frequency ultrasound excitation and some results have been presented in a previous conference. We are currently working on multi-frequency excitation models. The study will provide results and insights of the efficiency of different frequency excitation sources to foster the development of the technology for crack detection in aircraft engine components.

  12. "Dust, Ice, and Gas In Time" (DIGIT) Herschel Observations of GSS30-IRS1 in Ophiuchus

    E-Print Network [OSTI]

    Je, Hyerin; Lee, Seokho; Green, Joel D; Evans, Neal J

    2015-01-01T23:59:59.000Z

    As a part of the "Dust, Ice, and Gas In Time" (DIGIT) key program on Herschel, we observed GSS30-IRS1, a Class I protostar located in Ophiuchus (d = 120 pc), with Herschel/Photodetector Array Camera and Spectrometer (PACS). More than 70 lines were detected within a wavelength range from 50 micron to 200 micron, including CO, H2O, OH, and two atomic [O I] lines at 63 and 145 micron. The [C II] line, known as a tracer of externally heated gas by the interstellar radiation field, is also detected at 158 micron. All lines, except [O I] and [C II], are detected only at the central spaxel of 9.4" X 9.4". The [O I] emissions are extended along a NE-SW orientation, and the [C II] line is detected over all spaxels, indicative of external PDR. The total [C II] intensity around GSS30 reveals that the far-ultraviolet radiation field is in the range of 3 to 20 G0, where G0 is in units of the Habing Field, 1.6 X 10^{-3} erg cm^{-2} s^{-1}. This enhanced external radiation field heats the envelope of GSS30-IRS1, causing the...

  13. Study of Plasma Interaction with Titanium Coated Ferritic Steel in IR-T1 Tokamak

    SciTech Connect (OSTI)

    Ghoranneviss, M.; Talebitaher, A.; Arvin, R.; Mohammadi, S.; Nikmohamadi, A.; Milani, M.; Salem, M. K.; Sari, A. H.; Yousefi, M. R.; Shokouhi, A. [Plasma Physics Research Center, Islamic Azad University, Tehran (Iran, Islamic Republic of); Khorshid, P. [Plasma Physics Research Center, Islamic Azad University, Tehran (Iran, Islamic Republic of); Department of Physics, Islamic Azad University, Mashhad (Iran, Islamic Republic of); Saboohi, S. [Department of Physics, Islamic Azad University, Tehran Central Campus (Iran, Islamic Republic of)

    2008-04-07T23:59:59.000Z

    Studies of plasma interaction with titanium coated ferritic steel is performed on IR-T1 tokamak. Titanium coating is one of the candidates for the plasma facing materials in a tokomak. Titaniumization is carried out by a sputtering method. Some of the samples were baked (3 hours at 460 deg. C) before sputtering. Atomic Force Microscopy (AFM) analyses before and after discharge in r/a = l .04 carried out. The samples (with distinctive titanium layers) were placed at different depths inside the vacuum vessel of the IR-T1 tokamak in the SOL region. A comparison of the titanium coated steel with bare ferritic steel exposed to plasma tokamak and glow discharges is made in this research. Depth of impurity penetration and retention, and the surface roughness are measured by using surface analysis methods. Rutherford backscattering method is used to measure the content of nitrogen, oxygen and titanium, before and after discharges. The result is shown a change in roughness with respect to position of samples.

  14. Spatially Resolved Spitzer-IRS Spectral Maps of the Superwind in M82

    E-Print Network [OSTI]

    Beiro, P; Lehnert, M D; Guillard, P; Heckman, T; Draine, B; Hollenbach, D; Walter, F; Sheth, K; Smith, J D; Shopbell, P; Boulanger, F; Surace, J; Hoopes, C; Engelbracht, C

    2015-01-01T23:59:59.000Z

    We have mapped the superwind/halo region of the nearby starburst galaxy M82 in the mid-infrared with $Spitzer-IRS$. The spectral regions covered include the H$_2 S(1)-S(3)$, [NeII], [NeIII] emission lines and PAH features. We estimate the total warm H$_2$ mass and the kinetic energy of the outflowing warm molecular gas to be between $M_{warm}\\sim5-17\\times10^6$ M$_{\\odot}$ and $E_{K}\\sim6-20\\times10^{53}$ erg. Using the ratios of the 6.2, 7.7 and 11.3 micron PAH features in the IRS spectra, we are able to estimate the average size and ionization state of the small grains in the superwind. There are large variations in the PAH flux ratios throughout the outflow. The 11.3/7.7 and the 6.2/7.7 PAH ratios both vary by more than a factor of five across the wind region. The Northern part of the wind has a significant population of PAH's with smaller 6.2/7.7 ratios than either the starburst disk or the Southern wind, indicating that on average, PAH emitters are larger and more ionized. The warm molecular gas to PAH f...

  15. Preliminary design studies for an iridium rod target at the BNL-AGS

    SciTech Connect (OSTI)

    Ludewig, H.; Hastings, J.; Montanez, P.; Todosow, M.

    1998-12-31T23:59:59.000Z

    The BNL-AGS is an intense source of 24 GeV protons. It is proposed to explore the potential to use these protons as the driver for a Pulsed Spallation Neutron Source target. The proposed target design is based on an edge cooled iridium rod concept--similar to the anti-proton production target which operated reliably at CERN under similar conditions. Lead, lead fluoride, and beryllium are investigated as possible reflector materials, and ambient temperature light water and 80 K light water ice are proposed as initial moderator materials. Both moderators are decoupled by cadmium containing moderator chamber walls. The small size of the target has the advantage that the moderators can be placed close to the target (resulting in a bright source), and since a large fraction of the radioactive inventory is contained in the iridium rod, removal and disposition of this inventory should be relatively simple and inexpensive.

  16. Spreading of Sn-Ag solders on FeNi alloys

    SciTech Connect (OSTI)

    Saiz, Eduardo; Hwang, C-W.; Suganuma, Katsuaki; Tomsia, Antoni P.

    2003-02-28T23:59:59.000Z

    The spreading of Sn-3Ag-xBi solders on Fe-42Ni has been studied using a drop transfer setup. Initial spreading velocities as fast as {approx}0.5 m/s have been recorded. The results are consistent with a liquid front moving on a metastable, flat, unreacted substrate and can be described by using a modified molecular-kinetic model for which the rate controlling step is the movement of one atom from the liquid to the surface of the solid substrate. Although the phase diagram predicts the formation of two Fe-Sn intermetallics at the solder/substrate interface in samples heated at temperatures lower than 513 C, after spreading at 250 C only a thin FeSn reaction layer could be observed. Two interfacial layers (FeSn and FeSn2) were found after spreading at 450 C.

  17. Commissioning the new high power rf system for the AGS with high intensity beam

    SciTech Connect (OSTI)

    Brennan, J.M.; Ciardullo, D.J.; Deng, D.P; Hayes, T.; Onillon, E.; Otis, A.; Sanders, R.T.; Zaltsman, A.

    1994-08-01T23:59:59.000Z

    A new high power rf system has been installed in the AGS in order to raise the beam loading limit to beyond 6 {times} 10{sup 13} protons per pulse. The old system was limited to 2.2 {times} 10{sup l3} ppp by: available real power, multi-loop instability, and transient beam loading during batch filling from the Booster. The key components of the new system are: new power amplifiers in the tunnel using the Thomson-CSF TH573 300kW tetrode, rf feedback around the power stage, and reduction of the 10 cavities` R/Q by 1.8 by additional gap capacitors. Commissioning of the new rf system with high intensity beam is described. The intensity goal for the 1994 running period is 4 {times} 10{sup 13} ppp. To date, 3.7 {times} 10{sup 13} ppp has been achieved.

  18. MEASUREMENTS AND MODELING OF EDDY CURRENT EFFECTS IN BNL'S AGS BOOSTER.

    SciTech Connect (OSTI)

    BROWN, K.A.; AHRENS, L.; GARDNER, C.; GLENN, J.W.; HARVEY, M.; MENG, W.; ZENO, K.

    2006-06-23T23:59:59.000Z

    Recent beam experiments at BNL's AGS Booster have enabled us to study in more detail the effects of eddy currents on the lattice structure and our control over the betatron tune. The Booster is capable of operating at ramp rates as high as 9 T/sec. At these ramp rates eddy currents in the vacuum chambers significantly alter the fields and gradients seen by the beam as it is accelerated. The Booster was designed with these effects in mind and to help control the field uniformity and linearity in the Booster Dipoles special vacuum chambers were designed with current windings to negate the affect of the induced eddy currents. In this report results from betatron tune measurements and eddy current simulations will be presented. We will then present results from modeling the accelerator using the results of the magnetic field simulations and compare these to the measurements.

  19. Method and etchant to join ag-clad BSSCO superconducting tape

    DOE Patents [OSTI]

    Balachandran, Uthamalingam (Hinsdale, IL); Iyer, Anand N. (Downers Grove, IL); Huang, Jiann Yuan (Hsinchu, TW)

    1999-01-01T23:59:59.000Z

    A method of removing a silver cladding from high temperature superconducting material clad in silver (HTS) is disclosed. The silver clad HTS is contacted with an aqueous solution of HNO.sub.3 followed by an aqueous solution of NH.sub.4 OH and H.sub.2 O.sub.2 for a time sufficient to remove the silver cladding from the superconducting material without adversely affecting the superconducting properties of the superconducting material. A portion of the silver cladding may be masked with a material chemically impervious to HNO.sub.3 and to a combination of NH.sub.4 OH and H.sub.2 O.sub.2 to preserve the Ag coating. A silver clad superconductor is disclosed, made in accordance with the method discussed.

  20. Quasi-two-dimensional Dirac fermions and quantum magnetoresistance in LaAgBi2

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

    Wang, Kefeng; Graf, D.; Petrovic, C.

    2013-06-01T23:59:59.000Z

    We report quasi-two-dimensional (2D) Dirac fermions and quantum magnetoresistance in LaAgBi2. The band structure shows several narrow bands with nearly linear energy dispersion and Dirac-cone-like points at the Fermi level. The quantum oscillation experiments revealed one quasi-two-dimensional Fermi pocket and another complex pocket with a small cyclotron resonant mass. The in-plane transverse magnetoresistance exhibits a crossover at a critical field B? from semiclassical weak-field B2 dependence to the high-field unsaturated linear magnetoresistance which is attributed to the quantum limit of the Dirac fermions. Our results suggest the existence of quasi-2D Dirac fermions in rare-earth-based layered compounds with two-dimensional double-sized Bi square nets, similar to (Ca,Sr)MnBi2, irrespective of magnetic order.