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1,347 Matching Results
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World Trade Organization: Cancun Ministerial Fails to Move Global Trade Negotiations Forward; Next Steps Uncertain
A letter report issued by the General Accounting Office with an abstract that begins "Trade ministers from 146 members of the World Trade Organization (WTO), representing 93 percent of global commerce, convened in Cancun, Mexico, in September 2003. Their goal was to provide direction for ongoing trade negotiations involving a broad set of issues that included agriculture, nonagricultural market access, services, and special treatment for developing countries. These negotiations, part of the global round of trade liberalizing talks launched in November 2001 at Doha, Qatar, are an important means of providing impetus to the world's economy. The round was supposed to be completed by January 1, 2005. However, the Cancun Ministerial Conference ultimately collapsed without ministers reaching agreement on any of the key issues. GAO was asked to analyze (1) the divisions on key issues for the Cancun Ministerial Conference and how they were dealt with at Cancun and (2) the factors that influenced the outcome of the Cancun Ministerial Conference."
Date:
January 15, 2004
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
Defense Management: Issues in Contracting for Lodging and Temporary Office Space at MacDill Air Force Base
A letter report issued by the General Accounting Office with an abstract that begins "Since the September 11, 2001, attacks and the beginning of Operation Iraqi Freedom, thousands of National Guard and Reserve members have been activated and mobilized to military installations across the country. Some installations, like MacDill Air Force Base in Tampa, Florida, where more than 3,000 reservists have been mobilized, have had to arrange for off-base lodging in local hotels and apartment buildings. In addition, MacDill, which serves as U.S. Central Command headquarters, has had to set up temporary office space for staffs of coalition partner nations. Public concerns have been raised about these arrangements. GAO was asked to review (1) the extent to which MacDill used cost-effective measures to provide off-base lodging for reservists and (2) whether a contract providing office space for coalition partners was adequately managed to control costs."
Date:
January 27, 2004
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
Centers for Disease Control and Prevention: Agency Leadership Taking Steps to Improve Management and Planning, but Challenges Remain
A letter report issued by the General Accounting Office with an abstract that begins "The scope of work at the Centers for Disease Control and Prevention (CDC) has evolved since 1946 from a focus on communicable diseases, like malaria, to a wide and complex range of public health responsibilities. The agency's Office of the Director (OD) faces considerable management challenges to ensure that during public health crises the agency's nonemergency but important public health work continues apace. In 2002, the agency's OD began taking steps aimed at organizational change. GAO has observed elsewhere that major change management initiatives can take at least 5 to 7 years. In this report, GAO examined the extent to which organizational changes have helped balance OD's oversight of CDC's emergent and ongoing public health responsibilities. Specifically, GAO examined OD's (1) executive management structure, (2) approach to overseeing the agency's work, and (3) approach to setting the agency's priorities."
Date:
January 30, 2004
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
VA Health Care: Access for Chattanooga-Area Veterans Needs Improvement
A letter report issued by the General Accounting Office with an abstract that begins "Veterans residing in Chattanooga, Tennessee, have had difficulty accessing Department of Veterans Affairs (VA) health care. In response, VA has acted to reduce travel times to medical facilities and waiting times for appointments with primary and specialty care physicians. Recently, VA released a draft national plan for restructuring its health care system as part of a planning initiative known as Capital Asset Realignment for Enhanced Services (CARES). GAO was asked to assess Chattanooga-area veterans' access to inpatient hospital and outpatient primary and specialty care against VA's guidelines for travel times and appointment waiting times and to determine how the draft CARES plan would affect Chattanooga-area veterans' access to such care."
Date:
January 30, 2004
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
[Minutes: Intelligence Joint Cross-Service Group, January 14, 2004]
BRAC 2005 Intelligence Joint Cross-Service Group Meeting Minutes of January 14, 2004. The document is redacted and includes the BRAC 2005 Military Value Analysis Training Module brief (PowerPoint slides).
Date:
January 14, 2004
Creator:
United States. Department of Defense.
Object Type:
Text
System:
The UNT Digital Library
[Minutes: Intelligence Joint Cross-Service Group, January 16, 2004]
BRAC 2005 Intelligence Joint Cross-Service Group Meeting Minutes of January 16, 2004. The document is redacted and includes the BRAC 2005 Military Value Analysis Training Module brief (PowerPoint slides).
Date:
January 16, 2004
Creator:
United States. Department of Defense.
Object Type:
Text
System:
The UNT Digital Library
Analysis of Ranges During BRAC 2005
Memorandums from the Department Defense regarding an analysis of ranges by the Education and Training Joint Cross-Service Group. Issues of classification are brought up, but the first memorandum notes that the Air Force has no classified ranges, only classified activities on those ranges.
Date:
January 8, 2004
Creator:
United States. Department of Defense.
Object Type:
Letter
System:
The UNT Digital Library
Social Security and Medicare Taxes and Premiums: Fact Sheet
Financing for social security -- Old Age, Survivors, and Disability Insurance -- and the Hospital Insurance part of Medicare is provided primarily by taxes levied on wages and net self-employment income. Financing for the Supplementary Medical Insurance portion of Medicare is provided by premiums from enrollees and payments from the government. This report describes these taxes and premiums.
Date:
January 13, 2004
Creator:
Nuschler, Dawn
Object Type:
Report
System:
The UNT Digital Library
Brief Facts About Congressional Pensions
This report contains a table that lists the number of retired Members of Congress and the average amount of congressional pension they receive in retirement.
Date:
January 13, 2004
Creator:
Purcell, Patrick J.
Object Type:
Report
System:
The UNT Digital Library
Estimation of the parameter covariance matrix for aone-compartment cardiac perfusion model estimated from a dynamic sequencereconstructed using map iterative reconstruction algorithms
In dynamic cardiac SPECT estimates of kinetic parameters ofa one-compartment perfusion model are usually obtained in a two stepprocess: 1) first a MAP iterative algorithm, which properly models thePoisson statistics and the physics of the data acquisition, reconstructsa sequence of dynamic reconstructions, 2) then kinetic parameters areestimated from time activity curves generated from the dynamicreconstructions. This paper provides a method for calculating thecovariance matrix of the kinetic parameters, which are determined usingweighted least squares fitting that incorporates the estimated varianceand covariance of the dynamic reconstructions. For each transaxial slicesets of sequential tomographic projections are reconstructed into asequence of transaxial reconstructions usingfor each reconstruction inthe time sequence an iterative MAP reconstruction to calculate themaximum a priori reconstructed estimate. Time-activity curves for a sumof activity in a blood region inside the left ventricle and a sum in acardiac tissue region are generated. Also, curves for the variance of thetwo estimates of the sum and for the covariance between the two ROIestimates are generated as a function of time at convergence using anexpression obtained from the fixed-point solution of the statisticalerror of the reconstruction. A one-compartment model is fit to the tissueactivity curves assuming a noisy blood input function to give weightedleast squares …
Date:
January 1, 2004
Creator:
Gullberg, Grant T.; Huesman, Ronald H.; Reutter, Bryan W.; Qi,Jinyi & Ghosh Roy, Dilip N.
Object Type:
Report
System:
The UNT Digital Library
Soft X-ray synchrotron radiation investigations of actinidematerials systems utilizing X-ray emission spectroscopy and resonantinelastic X-ray scattering
Synchrotron radiation (SR) methods have been utilized with increasing frequency over the past several years to study topics in actinide science, ranging from those of a fundamental nature to those that address a specifically-targeted technical need. In particular, the emergence of microspectroscopic and fluorescence-based techniques have permitted investigations of actinide materials at sources of soft x-ray SR. Spectroscopic techniques with fluorescence-based detection are useful for actinide investigations since they are sensitive to small amounts of material and the information sampling depth may be varied. These characteristics also serve to simplify both sample preparation and safety considerations. Examples of investigations using these fluorescence techniques will be described along with their results, as well as the prospects for future investigations utilizing these methodologies.
Date:
January 3, 2004
Creator:
Shuh, D.K.; Butorin, S.M.; Guo, J.-H. & Nordgren, J.
Object Type:
Article
System:
The UNT Digital Library
Line-imaging velocimeter for shock diagnostics at the OMEGA laser facility
None
Date:
January 26, 2004
Creator:
Celliers, P M; Bradley, D K; Collins, G W; Hicks, D G; Boehly, T R & Armstrong, W J
Object Type:
Article
System:
The UNT Digital Library
Performance characteristics of a cosmology package on leading HPCarchitectures
The Cosmic Microwave Background (CMB) is a snapshot of the Universe some 400,000 years after the Big Bang. The pattern of anisotropies in the CMB carries a wealth of information about the fundamental parameters of cosmology. Extracting this information is an extremely computationally expensive endeavor, requiring massively parallel computers and software packages capable of exploiting them. One such package is the Microwave Anisotropy Dataset Computational Analysis Package (MADCAP) which has been used to analyze data from a number of CMB experiments. In this work, we compare MADCAP performance on the vector-based Earth Simulator (ES) and Cray X1 architectures and two leading superscalar systems, the IBM Power3 and Power4. Our results highlight the complex interplay between the problem size, architectural paradigm, interconnect, and vendor-supplied numerical libraries, while isolating the I/O file system as the key bottleneck across all the platforms.
Date:
January 1, 2004
Creator:
Carter, Jonathan; Borrill, Julian & Oliker, Leonid
Object Type:
Article
System:
The UNT Digital Library
Closure Report for Corrective Action Unit 358: Areas 18, 19, 20 Cellars/Mud Pits, Nevada Test Site, Nevada
This closure report documents that the closure activities performed at Corrective Action Unit 358: Areas 18, 19, 20 Cellars/Mud Pits, were in accordance with the Nevada Division of Environmental Protection approved Streamlined Approach for Environmental Restoration Plan for Corrective Action Unit 358.
Date:
January 1, 2004
Creator:
United States. National Nuclear Security Administration. Nevada Site Office.
Object Type:
Report
System:
The UNT Digital Library
Scheduling in Heterogeneous Grid Environments: The Effects of DataMigration
Computational grids have the potential for solving large-scale scientific problems using heterogeneous and geographically distributed resources. However, a number of major technical hurdles must be overcome before this goal can be fully realized. One problem critical to the effective utilization of computational grids is efficient job scheduling. Our prior work addressed this challenge by defining a grid scheduling architecture and several job migration strategies. The focus of this study is to explore the impact of data migration under a variety of demanding grid conditions. We evaluate our grid scheduling algorithms by simulating compute servers, various groupings of servers into sites, and inter-server networks, using real workloads obtained from leading supercomputing centers. Several key performance metrics are used to compare the behavior of our algorithms against reference local and centralized scheduling schemes. Results show the tremendous benefits of grid scheduling, even in the presence of input/output data migration - while highlighting the importance of utilizing communication-aware scheduling schemes.
Date:
January 1, 2004
Creator:
Oliker, Leonid; Biswas, Rupak; Shan, Hongzhang & Smith, Warren
Object Type:
Article
System:
The UNT Digital Library
Proc. Agent 2004 Conf. on Social Dynamics : Interaction, Reflexivity and Emergence
I'd like to welcome you to the Agent 2004 conference. As most of you are aware, this conference is the fifth in a series of meetings that began in 1999. A conference followed the next year in 2000. The 2001 conference was skipped because of some conflicts with other conferences, and the conferences have proceeded annually since then. We have the proceedings of the previous conferences available here on CDs. One CD has the proceedings from 1999, 2000, and 2002; the other contains last year's proceedings. The purpose of these conferences is to advance the state of the computational social sciences and to integrate the social sciences with the decision sciences and something that is traditionally known as the management sciences. Those of you in the operations/research area are familiar with the traditional school of modeling simulation that emerged from that scientific area. This conference will bring together a different group of people to talk about the topic of agent-based theories and simulations. This fifth agent conference is one of a group of conferences held annually around the country. Most of you are probably aware of the CASOS Conference held at Carnegie Mellon University, usually in July. UCLA holds the …
Date:
January 1, 2004
Creator:
C. M. Macal, D. Sallach, M. J. North, eds.
Object Type:
Article
System:
The UNT Digital Library
Reinforcement of Aluminum Castings with Dissimilar Metals
The project ''Reinforcement of Aluminum Casting with Dissimilar Metal'' was a Cooperative Research and Development Agreements (CRADAs) between Oak Ridge National Laboratory (ORNL) and Cummins Inc. This project, technologies have been developed to reinforce aluminum castings with steel insert. Defect-free bond between the steel insert and the aluminum casting has been consistently obtained. The push-out experiment indicated that the bond strength is higher than that of the Al-Fin method. Two patents have been granted to the project team that is comprised of Cummins Inc. and ORNL. This report contains four sections: the coating of the steel pins, the cast-in method, microstructure characterization, and the bond strength. The section of the coating of the steel pins contains coating material selection, electro-plating technique for plating Cu and Ni on steel, and diffusion bonding of the coatings to the steel. The section of cast-in method deals with factors that affecting the quality of the metallurgical bond between the coated steel and the aluminum castings. The results of microstructure characteristics of the bonding are presented in the microstructure characterization section. A push-out experiment and the results obtained using this method is described in the section of bond strength/mechanical property.
Date:
January 7, 2004
Creator:
Han, Q
Object Type:
Report
System:
The UNT Digital Library
Habitat Evaluation Procedures (HEP) Report : Rainwater Wildlife Area, 1998-2001 Technical Report.
The 8,768 acre Rainwater Wildlife Area was acquired in September 1998 by the Confederated Tribes of the Umatilla Indian Reservation (CTUIR) through an agreement with Bonneville Power Administration (BPA) to partially offset habitat losses associated with construction of the John Day and McNary hydroelectric facilities on the mainstem Columbia River. U.S. Fish and Wildlife Service (USFWS) Habitat Evaluation Procedures (HEP) were used to determine the number of habitat units credited to BPA for acquired lands. Upland and riparian forest, upland and riparian shrub, and grassland rover types are evaluated in this study. Targeted wildlife species include downy woodpecker (Picoides pubescens), black-capped chickadee (Parus atricopillus), blue grouse (Dendragapus obscurus), great blue heron (Ardea herodias), yellow warbler (Dendroica petechia), mink (Mustela vison), and Western meadowlark (Sturnella neglects). Habitat surveys were conducted in 1998 and 1999 in accordance with published HEP protocols and included 65,300, 594m{sup 2} plots, and 112 one-tenth-acre plots. Between 153.3 and 7,187.46 acres were evaluated for each target wildlife mitigation species. Derived habitat suitability indices were multiplied by corresponding cover-type acreages to determine the number of habitat units for each species. The total baseline habitat units credited to BPA for the Rainwater Wildlife Area and its seven target species …
Date:
January 1, 2004
Creator:
Childs, Allen
Object Type:
Report
System:
The UNT Digital Library
An Iterative Phase-Space Explicit Discontinuous Galerkin Method for Stellar Radiative Transfer in Extended Atmospheres
A phase-space discontinuous Galerkin (PSDG) method is presented for the solution of stellar radiative transfer problems. It allows for greater adaptivity than competing methods without sacrificing generality. The method is extensively tested on a spherically symmetric, static, inverse-power-law scattering atmosphere. Results for different sizes of atmospheres and intensities of scattering agreed with asymptotic values. The exponentially decaying behavior of the radiative field in the diffusive-transparent transition region and the forward peaking behavior at the surface of extended atmospheres were accurately captured. The integrodifferential equation of radiation transfer is solved iteratively by alternating between the radiative pressure equation and the original equation with the integral term treated as an energy density source term. In each iteration, the equations are solved via an explicit, flux-conserving, discontinuous Galerkin method. Finite elements are ordered in wave fronts perpendicularly to the characteristic curves so that elemental linear algebraic systems are solved quickly by sweeping the phase space element by element. Two implementations of a diffusive boundary condition at the origin are demonstrated wherein the finite discontinuity in the radiative intensity is accurately captured by the proposed method. This allows for a consistent mechanism to preserve photon luminosity. The method was proved to be robust and …
Date:
January 28, 2004
Creator:
de Almeida, V.F.
Object Type:
Report
System:
The UNT Digital Library
Enhancement of Terrestrial Carbon Sinks through the Reclamation of Abandoned Mined Lands
None
Date:
January 31, 2004
Creator:
Kronrad, Gary
Object Type:
Report
System:
The UNT Digital Library
Comparison of Wide-Bandgap Semiconductors for Power Electronics Applications
Recent developmental advances have allowed silicon (Si) semiconductor technology to approach the theoretical limits of the Si material; however, power device requirements for many applications are at a point that the present Si-based power devices cannot handle. The requirements include higher blocking voltages, switching frequencies, efficiency, and reliability. To overcome these limitations, new semiconductor materials for power device applications are needed. For high power requirements, wide-bandgap semiconductors like silicon carbide (SiC), gallium nitride (GaN), and diamond, with their superior electrical properties, are likely candidates to replace Si in the near future. This report compares wide-bandgap semiconductors with respect to their promise and applicability for power applications and predicts the future of power device semiconductor materials.
Date:
January 2, 2004
Creator:
Ozpineci, B.
Object Type:
Report
System:
The UNT Digital Library
Phase I Report: DARPA Exoskeleton Program
The Defense Advanced Research Projects Agency (DARPA) inaugurated a program addressing research and development for an Exoskeleton for Human Performance Augmentation in FY!2001. A team consisting of Oak Ridge National Laboratory, the prime contractor, AeroVironment, Inc., the Army Research Laboratory, the University of Minnesota, and the Virginia Polytechnic Institute has recently completed an 18-month Phase I effort in support of this DARPA program. The Phase I effort focused on the development and proof-of-concept demonstrations for key enabling technologies, laying the foundation for subsequently building and demonstrating a prototype exoskeleton. The overall approach was driven by the need to optimize energy efficiency while providing a system that augmented the operator in as transparent manner as possible (non-impeding). These needs led to the evolution of two key distinguishing features of this team's approach. The first is the ''no knee contact'' concept. This concept is dependent on a unique Cartesian-based control scheme that uses force sensing at the foot and backpack attachments to allow the exoskeleton to closely follow the operator while avoiding the difficulty of connecting and sensing position at the knee. The second is an emphasis on energy efficiency manifested by an energetic, power, actuation and controls approach designed to enhance …
Date:
January 21, 2004
Creator:
Jansen, J.F.
Object Type:
Report
System:
The UNT Digital Library
U.S. Radioecology Research Programs of the Atomic Energy Commission in the 1950s
This report contains two companion papers about radiological and environmental research that developed out of efforts of the Atomic Energy Commission in the late 1940s and the 1950s. Both papers were written for the Joint U.S.-Russian International Symposium entitled ''History of Atomic Energy Projects in the 1950s--Sociopolitical, Environmental, and Engineering Lessons Learned,'' which was hosted by the International Institute for Applied Systems Analysis in Laxemberg, Austria, in October 1999. Because the proceedings of this symposium were not published, these valuable historic reviews and their references are being documented as a single ORNL report. The first paper, ''U.S. Radioecology Research Programs Initiated in the 1950s,'' written by David Reichle and Stanley Auerbach, deals with the formation of the early radioecological research programs at the U.S. Atomic Energy Commission's nuclear production facilities at the Clinton Engineering Works in Oak Ridge, Tennessee; at the Hanford Plant in Richland, Washington; and at the Savannah River Plant in Georgia. These early radioecology programs were outgrowths of the environmental monitoring programs at each site and eventually developed into the world renowned National Laboratory environmental program sponsored by the Office of Biological and Environmental Research of the U.S. Department of Energy. The original version of the first …
Date:
January 12, 2004
Creator:
Reichle, D.E.
Object Type:
Report
System:
The UNT Digital Library
Phase 2 THOR Steam Reforming Tests for Sodium Bearing Waste Treatment
About one million gallons of acidic, hazardous, and radioactive sodium-bearing waste is stored in stainless steel tanks at the Idaho Nuclear Technology and Engineering Center (INTEC), which is a major operating facility of the Idaho National Engineering and Environmental Laboratory. Steam reforming is a candidate technology being investigated for converting the waste into a road ready waste form that can be shipped to the Waste Isolation Pilot Plant in New Mexico for interment. A steam reforming technology patented by Studsvik, Inc., and licensed to THOR Treatment Technologies has been tested in two phases using a Department of Energy-owned fluidized bed test system located at the Science Applications International Corporation (SAIC) Science and Technology Applications Research Center located in Idaho Falls, Idaho. The Phase 1 tests were reported earlier in 2003. The Phase 2 tests are reported here. For Phase 2, the process feed rate, stoichiometry, and chemistry were varied to identify and demonstrate process operation and product characteristics under different operating conditions. Two test series were performed. During the first series, the process chemistry was designed to produce a sodium carbonate product. The second series was designed to produce a more leach-resistant, mineralized sodium aluminosilicate product. The tests also demonstrated …
Date:
January 1, 2004
Creator:
Soelberg, Nicholas R.
Object Type:
Report
System:
The UNT Digital Library