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2,723 Matching Results
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Molecular Mechanism of Metal-Chalcogen Bond Formation in theSynthesis of Colloidal II-VI Semiconductor Nanocrystals
None
Date:
July 31, 2006
Creator:
Liu, Haitao; Owen, Jonathan S. & Alivisatos, A. Paul
Object Type:
Article
System:
The UNT Digital Library
National Sex Offender Registry: New Hire Data Has Potential for Updating Addresses of Convicted Sex Offenders
A letter report issued by the Government Accountability Office with an abstract that begins "In the 1990s, several heinous crimes put the issue of the sexual abuse of children onto the nation's policy agenda. Sexual crimes against children and adults are often perpetrated by individuals known to their victims and these crimes devastate families and communities. To safeguard children and their families, Congress enacted a series of laws between 1994 and 2003 that required sex offenders to register their addresses with law enforcement agencies. The laws also required that states, in order to be eligible to receive certain federal funds, establish sex offender registries, and the Department of Justice (DOJ) establish a national sex offender registry. The National Sex Offender Registry (NSOR) is maintained by the Federal Bureau of Investigation (FBI) within DOJ. It is a nationwide database compiled from information in individual state sex offender registries and it currently lists over 400,000 convicted sex offenders. The system requires convicted sex offenders to register with law enforcement agencies upon release from prison and to update their address information whenever they move or change addresses. Law enforcement agencies rely on information in sex offender registries to track the location and movement …
Date:
July 31, 2006
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
NERSC Annual Report 2005
The National Energy Research Scientific Computing Center (NERSC) is the premier computational resource for scientific research funded by the DOE Office of Science. The Annual Report includes summaries of recent significant and representative computational science projects conducted on NERSC systems as well as information about NERSC's current and planned systems and services.
Date:
July 31, 2006
Creator:
Hules (Ed.), John
Object Type:
Report
System:
The UNT Digital Library
A New Concept for the Fabrication of Hydrogen Selective Silica Membranes
We are attempting to fabricate H{sub 2}-selective silica-based films by ''layer-by-layer'' deposition as a new approach for thin films. A sonication-assisted deposition method was mainly used for ''layer-by-layer'' deposition. In addition, other approaches such as a dip-coating and the use of a polymer matrix with a layered silicate were contrived as well. This report shows the progress done during the 2nd Year of this award.
Date:
July 31, 2006
Creator:
Tsapatsis, Michael
Object Type:
Report
System:
The UNT Digital Library
Phase II Calderon Process to Produce Direct Reduced Iron Research and Development Project Quarterly Report: April-June 2006
None
Date:
July 31, 2006
Creator:
Calderon, Albert
Object Type:
Report
System:
The UNT Digital Library
Proceedings From RIKEN BNL Research Center Workshop: Heavy Flavor Productions and Hot/Dense Quark Matter.
None
Date:
July 31, 2006
Creator:
Akiba, Y.; Huang, H.; Rapp, R.; Tuchin, K. & Xie, W.
Object Type:
Report
System:
The UNT Digital Library
Process Design for the Biocatalysis of Value-Added Chemicals from Carbon Dioxide
This report describes results toward developing a process to sequester CO{sub 2} centered on the enzyme pyruvate carboxylase. The process involves the use of bacteria to convert CO{sub 2} and glucose as a co-substrate and generates succinic acid as a commodity chemical product. The phases of research have included strain development and process development. Though we continue to work on one important component of strain development, the research has principally focused on process development. In the previous year we constructed several strains which would serve as templates for the CO{sub 2} sequestration, including the knock-out of genes involved in the formation of undesirable byproducts. This project period the focus has been on the integration of the pyruvate carboxylase gene (pyc) onto the E. coli chromosome. This has proven to be a difficult task because of relatively low expression of the gene and resulting low enzyme activity when only one copy of the gene is present on the chromosome. Several molecular biology techniques have been applied, with some success, to improve the level of protein activity as described herein. Progress in process development has come as a result of conducting numerous fermentation experiments to select optimal conditions for CO{sub 2} sequestration. …
Date:
July 31, 2006
Creator:
Eiteman, Mark A.
Object Type:
Report
System:
The UNT Digital Library
Rental Housing Programs: Excluding Servicemembers' Housing Allowances from Income Determinations Would Increase Eligibility, but Other Factors May Limit Program Use
A letter report issued by the Government Accountability Office with an abstract that begins "Although the Department of Defense (DOD) pays active-duty servicemembers who do not live in military housing a Basic Allowance for Housing (BAH) to help them afford private market residences, expected growth at some military installations has raised concerns about whether nearby communities will have enough affordable rental housing for incoming personnel. In response to a congressional mandate, GAO assessed (1) how excluding BAH would affect servicemembers' eligibility to apply for federal rental housing programs and (2) factors that could affect their use of the programs in selected communities gaining military personnel. GAO compared servicemembers' eligibility for the programs as of December 2005 by including and excluding BAH from income determinations and examined factors affecting potential program use near four growing military installations."
Date:
July 31, 2006
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Report of the Illinois Special State’s Attorney Relating to Police Brutality: A Legal Analysis of Federal Laws Implicated
None
Date:
July 31, 2006
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Sapulpa Daily Herald (Sapulpa, Okla.), Vol. 91, No. 278, Ed. 1 Monday, July 31, 2006
Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 31, 2006
Creator:
Stone, Greg
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Search for B+ to X(3872) K+, X(3872) to J/psi gamma
In a study of B{sup +} {yields} J/{psi}{gamma}K{sup +} decays, they find evidence for the radiative decay X(3872) {yields} J/{psi}{gamma} with a statistical significance of 3.4{sigma}. They measure the product of branching fractions {Beta}(B{sup +} {yields} X(3872)K{sup +}) {center_dot} {Beta}(X(3872) {yields} J/{psi}{gamma}) = (3.3 {+-} 1.0 {+-} 0.3) x 10{sup -6}, where the uncertainties are statistical and systematic, respectively. They also measure the branching fraction {Beta}(B{sup +} {yields} {chi}{sub c1}K{sup +}) = (4.9 {+-} 0.20 {+-} 0.4) x 10{sup -4}. These results are obtained from (287 {+-} 3) million B{bar B} decays collected at the {Upsilon}(4S) resonance with the BABAR detector at the PEP-II B Factory at SLAC.
Date:
July 31, 2006
Creator:
Aubert, B.
Object Type:
Article
System:
The UNT Digital Library
The Search for the Rare Decay B to a0+pi0
A search for the decay B{+-} {yields} a{sub 0}{sup {+-}}{pi}{sup 0} with the a{sub 0}{sup +} decaying to an {eta} and a {pi}{sup +} was carried out at the Stanford Linear Accelerator Center using the BABAR detector coupled with the PEP-II collider. The analysis used a data sample comprised of approximately 252 million B{bar B} pairs collected at the {Upsilon}(4S) resonance. No signal was observed and a 90% confidence level upper limit on the branching fraction was set at 1.32 x 10{sup -6}.
Date:
July 31, 2006
Creator:
Vazquez, W
Object Type:
Article
System:
The UNT Digital Library
Searches for B0 Decays to eta K0, eta eta,eta' eta', eta phi, and eta'phi
The authors search for B{sup 0} meson decays into two-body combinations of K{sup 0}, {eta}, {eta}', and {phi} mesons in 324 million B{bar B} pairs collected with the BABAR detector at the PEP-II asymmetric-energy e{sup +}e{sup -} collider at SLAC. They measure the following branching fractions (upper limits at 90% confidence level) in units of 10{sup -6}: {Beta}(B{sup 0} {yields} {eta}K{sup 0}) = 1.8{sub -0.6}{sup +0.7} {+-} 0.1 (< 2.9), {Beta}(B{sup 0} {yields} {eta}{eta}) = 1.1{sub -0.4}{sup +0.5} {+-} 0.1(< 1.8), {Beta}(B{sup 0} {yields} {eta}{phi}) = 0.1 {+-} 0.2 {+-} 0.1(< 0.6), {Beta}(B{sup 0} {yields} {eta}'{phi}) = 0.2{sub -0.3}{sup +0.4} {+-} 0.1(< 1.0), and {Beta}(B{sup 0} {yields} {eta}'{eta}') = 1.0{sub -0.6}{sup +0.8} {+-} 0.1 (< 2.4), where the first error is statistical and the second systematic.
Date:
July 31, 2006
Creator:
Aubert, B.
Object Type:
Article
System:
The UNT Digital Library
Security and Policy for Group Collaboration
“Security and Policy for Group Collaboration” was a Collaboratory Middleware research project aimed at providing the fundamental security and policy infrastructure required to support the creation and operation of distributed, computationally enabled collaborations. The project developed infrastructure that exploits innovative new techniques to address challenging issues of scale, dynamics, distribution, and role. To reduce greatly the cost of adding new members to a collaboration, we developed and evaluated new techniques for creating and managing credentials based on public key certificates, including support for online certificate generation, online certificate repositories, and support for multiple certificate authorities. To facilitate the integration of new resources into a collaboration, we improved significantly the integration of local security environments. To make it easy to create and change the role and associated privileges of both resources and participants of collaboration, we developed community wide authorization services that provide distributed, scalable means for specifying policy. These services make it possible for the delegation of capability from the community to a specific user, class of user or resource. Finally, we instantiated our research results into a framework that makes it useable to a wide range of collaborative tools. The resulting mechanisms and software have been widely adopted within …
Date:
July 31, 2006
Creator:
Foster, Ian & Kesselman, Carl
Object Type:
Report
System:
The UNT Digital Library
Security Assistance: Lapses in Human Rights Screening in North African Countries Indicate Need for Further Oversight
A letter report issued by the Government Accountability Office with an abstract that begins "Algeria, Morocco, and Tunisia are important U.S. allies in the war on terrorism. The United States provides these countries with security assistance, however, Congress restricts funding when credible evidence exists that foreign security units have committed gross human rights violations. GAO (1) describes the goals of U.S. security assistance to these countries and examines U.S. agencies' assessment of this assistance, (2) assesses U.S. agencies' implementation in Morocco and Tunisia of State's policy to screen foreign security forces to ensure compliance with congressional human rights funding restrictions, and (3) examines agencies' efforts to monitor the use of U.S.-origin defense articles provided through U.S. security assistance programs in the three countries, including Western Sahara, to ensure that they are not misused or diverted. GAO visited U.S. posts in Morocco and Tunisia and analyzed trainee files to determine compliance with human rights vetting policy."
Date:
July 31, 2006
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Social Security Administration Disability Demonstration Projects
None
Date:
July 31, 2006
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Software Roadmap to Plug and Play Petaflop/s
In the next five years, the DOE expects to build systemsthat approach a petaflop in scale. In the near term (two years), DOE willhave several near-petaflops systems that are 10 percent to 25 percent ofa peraflop-scale system. A common feature of these precursors to petaflopsystems (such as the Cray XT3 or the IBM BlueGene/L) is that they rely onan unprecedented degree of concurrency, which puts stress on every aspectof HPC system design. Such complex systems will likely break current bestpractices for fault resilience, I/O scaling, and debugging, and evenraise fundamental questions about languages and application programmingmodels. It is important that potential problems are anticipated farenough in advance that they can be addressed in time to prepare the wayfor petaflop-scale systems. This report considers the following fourquestions: (1) What software is on a critical path to make the systemswork? (2) What are the strengths/weaknesses of the vendors and ofexisting vendor solutions? (3) What are the local strengths at the labs?(4) Who are other key players who will play a role and canhelp?
Date:
July 31, 2006
Creator:
Kramer, Bill; Carter, Jonathan; Skinner, David; Oliker, Lenny; Husbands, Parry; Hargrove, Paul et al.
Object Type:
Report
System:
The UNT Digital Library
Solid State Energy Conversion Alliance (SECA) Solid Oxide Fuel Cell Program
This report summarizes the work performed for Phase I (October 2001 - August 2006) under Cooperative Agreement DE-FC26-01NT41245 for the U. S. Department of Energy, National Energy Technology Laboratory (DOE/NETL) entitled 'Solid State Energy Conversion Alliance (SECA) Solid Oxide Fuel Cell Program'. The program focuses on the development of a low-cost, high-performance 3-to-10-kW solid oxide fuel cell (SOFC) system suitable for a broad spectrum of power-generation applications. During Phase I of the program significant progress has been made in the area of SOFC technology. A high-efficiency low-cost system was designed and supporting technology developed such as fuel processing, controls, thermal management, and power electronics. Phase I culminated in the successful demonstration of a prototype system that achieved a peak efficiency of 41%, a high-volume cost of $724/kW, a peak power of 5.4 kW, and a degradation rate of 1.8% per 500 hours. . An improved prototype system was designed, assembled, and delivered to DOE/NETL at the end of the program. This prototype achieved an extraordinary peak efficiency of 49.6%.
Date:
July 31, 2006
Creator:
Minh, Nguyen
Object Type:
Report
System:
The UNT Digital Library
Special Operations Forces: Several Human Capital Challenges Must Be Addressed to Meet Expanded Role
A letter report issued by the Government Accountability Office with an abstract that begins "Since the Global War on Terrorism, the Department of Defense (DOD) has taken steps to expand the role of the United States Special Operations Command (Command) and its forces. In response, the Command has transformed its headquarters to coordinate counterterrorism activities, and DOD has increased funding and the number of special operations forces positions. Given the expanded mission, it is critical that the Command has personnel with the right knowledge and skill sets. GAO was asked to assess: (1) whether the Command has determined all of the personnel requirements needed to meet its expanded role; (2) the progress and challenges in meeting growth goals; and (3) any effect of deployments on the Command's ability to provide trained forces, and the progress made in managing deployments. GAO performed its work at the Special Operations Command and its service components, analyzed personnel data against requirements, and examined policies and directives."
Date:
July 31, 2006
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Spin coherence transfer in chemical transformations monitoredNMR
We demonstrate the use of micro-scale nuclear magneticresonance (NMR) for studying the transfer of spin coherence innon-equilibrium chemical processes, using spatially separated NMRencoding and detection coils. As an example, we provide the map ofchemical shift correlations for the amino acid alanine as it transitionsfrom the zwitterionic to the anionic form. Our method is unique in thesense that it allows us to track the chemical migration of encodednuclear spins during the course of chemical transformations.
Date:
July 31, 2006
Creator:
Anwar, Sabieh M.; Hilty, Christian; Chu, Chester; Bouchard,Louis-S.; Pierce, Kimberly L. & Pines, Alexander
Object Type:
Article
System:
The UNT Digital Library
STATISTICAL REVIEW OF CESIUM CARBONATE FUSION MEASUREMENTS OF ARCHIVED GLASS SAMPLES FROM THE DWPF PROCESS
This technical report provides a statistical review of measurements that the Defense Waste Processing Facility (DWPF) Laboratory (Lab) generated by Inductively-Coupled Plasma--Atomic Emission Spectroscopy (ICP-AES) for samples of archived Slurry Mix Evaporator (SME) glass that were prepared using a cesium carbonate (Cs{sub 2}CO{sub 3}) fusion dissolution method. Measurements were generated by both of the Lab's ICPs, which are designated as M-13 and M-14. Comparisons between the two ICPs suggest that for the ARG-1 measurements the M-14 provided lower (on average) concentration measurements for about 13 of the 16 elements reported by DWPF with Cr, Mn, Ni, and Zr being statistically lower (at a 5% significance level) for the ARG-1 samples. One of the three exceptions is Li, for which the M-14 yielded (on average) higher concentration measurements than the M-13. For the SME samples, the M-14 and M-13 measurements had statistically different (at the 5% significance level) means for B, Ca, Cr, Cu, Fe, Li, Mg, Mn, Na, Ni, Si, Ti, U, and Zr with the M-14 being lower than the M-13 for all of these elements except for Li. For the screened SME samples, statistically significant (at the 5% level) differences between the means of the Cs{sub 2}CO{sub 3} …
Date:
July 31, 2006
Creator:
Edwards, T
Object Type:
Report
System:
The UNT Digital Library
Strange Particle Production in $p+p$ Collisions at $\sqrt{s}$= 200GeV
We present strange particle spectra and yields measured atmid-rapidity in sqrt text s=200 GeV proton-proton (p+p) collisions atRHIC. We find that the previously observed universal transverse mass(mathrm mT \equiv\sqrt mathrm p_T 2+\mathrm m2) scaling of hadronproduction in p+p collisions seems to break down at higher \mt and thatthere is a difference in the shape of the \mt spectrum between baryonsand mesons. We observe mid-rapidity anti-baryon to baryon ratios nearunity for Lambda and Xi baryons and no dependence of the ratio ontransverse momentum, indicating that our data do not yet reach thequark-jet dominated region. We show the dependence of the mean transversemomentum (\mpt) on measured charged particle multiplicity and on particlemass and infer that these trends are consistent with gluon-jet dominatedparticle production. The data are compared to previous measurements fromCERN-SPS, ISR and FNAL experiments and to Leading Order (LO) and Next toLeading order (NLO) string fragmentation model predictions. We infer fromthese comparisons that the spectral shapes and particle yields from $p+p$collisions at RHIC energies have large contributions from gluon jetsrather than quark jets.
Date:
July 31, 2006
Creator:
Abelev, B. I.; Adams, J.; Aggarwal, M. M.; Ahammed, Z.; Amonett, J.; Anderson, B. D. et al.
Object Type:
Article
System:
The UNT Digital Library
STRUCTURAL FLUCTUATIONS, ELECTRICAL RESPONSE AND THE RELIABILITY OF NANOSTRUCTURES (FINAL REPORT)
The goal of the research supported by DOE-FG02-01ER45939 was to synthesize a number of experimental and theoretical approaches to understand the relationship between morphological fluctuations, the electrical response and the reliability (failure) of metallic nanostructures. The primary focus of our work was the study of metallic nanowires which we regard as prototypical of nanoscale interconnects. Our research plan has been to link together these materials properties and behaviors by understanding the phenomenon of, and the effects of electromigration at nanometer length scales. The thrust of our research has been founded on the concept that, for nanostructures where the surface-to-volume ratio is necessarily high, surface diffusion is the dominant mass transport mechanism that governs the fluctuations, electrical properties and failure modes of nanostructures. Our approach has been to develop experimental methods that permit the direct imaging of the electromagnetic distributions within nanostructures, their structural fluctuations and their electrical response. This experimental research is complemented by a parallel theoretical and computational program that describes the temporal evolution of nanostructures in response to current flow.
Date:
July 31, 2006
Creator:
Rous, Philip J.; Williams, Ellen D. & Fuhrer, Michael S.
Object Type:
Report
System:
The UNT Digital Library
Study of Vacuum Insulator Flashover for Pulse Lengths of Multi-Microseconds
We are studying the flashover of vacuum insulators for applications where high voltage conditioning of the insulator and electrodes is not practical and for pulse lengths on the order of several microseconds. The study is centered about experiments performed with a 100-kV, 10-ms pulsed power system and supported by a combination of theoretical and computational modeling. The base line geometry is a cylindrically symmetric, +45{sup o} insulator between flat electrodes. In the experiments, flashovers or breakdowns are localized by operating at field stresses slightly below the level needed for explosive emissions with the base line geometry. The electrodes and/or insulator are then seeded with an emission source, e.g. a tuft of velvet, or a known mechanical defect. Various standard techniques are employed to suppress cathode-originating flashovers/breakdowns. We present the results of our experiments and discuss the capabilities of modeling insulator flashover.
Date:
July 31, 2006
Creator:
Houck, T. L.; Goerz, D. A.; Javedani, J. B.; Lauer, E. J.; Tully, L. K. & Vogtlin, G. E.
Object Type:
Article
System:
The UNT Digital Library