A letter report issued by the General Accounting Office with an abstract that begins "Collecting fines ordered for violations of securities and futures laws helps ensure that violators are held accountable for their offenses and may also deter future violations. The requesters asked GAO to evaluate the actions the Securities and Exchange Commission (SEC) and Commodity Futures Trading Commission (CFTC) have taken to address earlier recommendations for improving their collection programs. The committees also asked GAO to update the fines collection rates from previous reports."

A letter report issued by the General Accounting Office with an abstract that begins "Spent nuclear fuel, the used fuel periodically removed from nuclear power reactors, is one of the most hazardous materials made by man. Nuclear power companies currently store 50,000 tons of spent fuel at 72 sites in 33 states. That amount will increase through 2010, when the Department of Energy (DOE) expects to open a permanent repository for this fuel at Yucca Mountain, Nevada. Concerns have been raised since September 11, 2001, that terrorists might target spent fuel. GAO was asked to (1) review federally sponsored studies that assessed the potential health effects of a terrorist attack or a severe accident on spent fuel, either in transit or in storage, and (2) identify options for DOE to further enhance the security of spent fuel during shipping to Yucca Mountain."

A letter report issued by the General Accounting Office with an abstract that begins "With the enactment of the Personal Responsibility and Work Opportunity Reconciliation Act of 1996 (PRWORA), the Congress made sweeping changes to federal policy for needy families. PRWORA ended the Aid to Families with Dependent Children (AFDC) program and created the Temporary Assistance for Needy Families (TANF) block grant to states. The Department of Health and Human Services (HHS) oversees the TANF block grant program, which provides grants to states totaling up to $16.5 billion each year and requires states to maintain a historical level of state spending on welfare reform programs. Under TANF, states have greater flexibility and face greater uncertainty than they did under AFDC. States have greater flexibility to design, finance, and implement programs for low-income families, including determining who is to be served and what services to provide. TANF also emphasizes the transitional nature of assistance and the importance of employment for welfare recipients. Because the amount of the TANF block grant is fixed, as caseloads decline--as they did in all states through the late 1990s--states have had additional resources that they have used to expand their programs, achieve some budgetary savings, and …

Testimony issued by the General Accounting Office with an abstract that begins "GAO has been providing ongoing assistance to the Capitol Preservation Commission and the Senate and House Appropriations Committees in their monitoring and oversight of the Capitol Visitor Center construction project. Given the current decisions facing the Congress, this testimony covers (1) management of the project, (2) the estimated cost for the project, (3) the status of the project's schedule, and (4) actions that Congress and the AOC should consider taking to address funding gaps and other current project issues and risks."

A letter report issued by the General Accounting Office with an abstract that begins "The U.S.-South Korean Land Partnership Plan (LPP), signed in March 2002, was designed to consolidate U.S. installations, improve combat readiness, enhance public safety, and strengthen the U.S.-South Korean alliance by addressing some of the causes of periodic tension associated with the U.S. presence in South Korea. The Senate report on military construction appropriations for fiscal year 2003 directed GAO to review the LPP. GAO adjusted its review to also address the effect of ongoing reassessments of U.S. overseas presence upon the LPP and other infrastructure needs. In this report, GAO assessed (1) the scope of the LPP, (2) the implications on the LPP and other construction projects of proposals to change basing in South Korea, and (3) implementation challenges associated with the LPP that could affect future U.S. military construction projects in South Korea."

A letter report issued by the General Accounting Office with an abstract that begins "Since July 1998, GAO has reported numerous times on nursing home quality-of-care issues and identified significant weaknesses in federal and state oversight. GAO was asked to assess the extent of the progress made in improving the quality of care provided by nursing homes to vulnerable elderly and disabled individuals, including (1) trends in measured nursing home quality, (2) state responses to previously identified weaknesses in their survey, complaint, and enforcement activities, and (3) the status of oversight and quality improvement efforts by the Centers for Medicare & Medicaid Services (CMS)."

Testimony issued by the General Accounting Office with an abstract that begins "Since September 11, 2001, visa operations have played an increasingly important role in ensuring the national security of the United States. The Departments of State, Homeland Security, and Justice, as well as other agencies, are involved in the visa process. Each plays an important role in making security decisions so that potential terrorists do not enter the country. In two GAO reports, we assessed the effectiveness of the visa process as an antiterrorism tool."

A letter report issued by the General Accounting Office with an abstract that begins "Prompted by a desire to reverse declining audience trends and to support the war on terrorism, the Broadcasting Board of Governors (BBG), the agency responsible for U.S. international broadcasting, began developing its new strategic approach to international broadcasting in July 2001. This approach emphasizes the need to reach mass audiences by applying modern broadcast techniques and strategically allocating resources to focus on high-priority markets. GAO was asked to examine (1) whether recent program initiatives have adhered to the Board's new strategic approach to broadcasting, (2) how the approach's effectiveness will be assessed, and (3) what critical challenges the Board faces in executing its strategy and how these challenges will be addressed."

A letter report issued by the General Accounting Office with an abstract that begins "The Department of Defense (DOD) is pursuing a new initiative involving a core competency approach for making sourcing decisions--that is, sourcing decisions based on whether the function is core to the agency's warfighting mission. In determining how to best perform non-core functions, DOD's position is that its components should look beyond just the use of public-private competitions under Office of Management and Budget (OMB) Circular A-76 in making sourcing decisions, and consider other alternatives such as partnering or employee stock ownership. GAO was asked to assess (1) the department's progress in assessing its core functions as a basis for sourcing decisions, (2) the plans and progress DOD has made in identifying and implementing alternatives to A-76, and (3) the current status of DOD's A-76 program."

The objective of this program was to investigate cyclic variations in spark-ignition (SI) engines under lean fueling conditions and to develop options to reduce emissions of nitrogen oxides (NOx) and particulate matter (PM) in compression-ignition direct-injection (CIDI) engines at high exhaust gas recirculation (EGR) rates. The CIDI activity builds upon an earlier collaboration between ORNL and Ford examining combustion instabilities in SI engines. Under the original CRADA, the principal objective was to understand the fundamental causes of combustion instability in spark-ignition engines operating with lean fueling. The results of this earlier activity demonstrated that such combustion instabilities are dominated by the effects of residual gas remaining in each cylinder from one cycle to the next. A very simple, low-order model was developed that explained the observed combustion instability as a noisy nonlinear dynamical process. The model concept lead to development of a real-time control strategy that could be employed to significantly reduce cyclic variations in real engines using existing sensors and engine control systems. This collaboration led to the issuance of a joint patent for spark-ignition engine control. After a few years, the CRADA was modified to focus more on EGR and CIDI engines. The modified CRADA examined relationships between …

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A research effort was undertaken to determine the need for any changes to USNRC's seismic regulatory practice to reflect the move, in the earthquake engineering community, toward using expected displacement rather than force (or stress) as the basis for assessing design adequacy. The research explored the extent to which displacement based seismic design methods, such as given in FEMA 273, could be useful for reviewing nuclear power stations. Two structures common to nuclear power plants were chosen to compare the results of the analysis models used. The first structure is a four-story frame structure with shear walls providing the primary lateral load system, referred herein as the shear wall model. The second structure is the turbine building of the Diablo Canyon nuclear power plant. The models were analyzed using both displacement based (pushover) analysis and nonlinear dynamic analysis. In addition, for the shear wall model an elastic analysis with ductility factors applied was also performed. The objectives of the work were to compare the results between the analyses, and to develop insights regarding the work that would be needed before the displacement based analysis methodology could be considered applicable to facilities licensed by the NRC. A summary of the research …

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Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

Weekly newspaper from Emory, Texas that includes local, state, and national news along with advertising.

Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.

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This paper presents a field modeling study characterizing fluid flow and tracer transport in the unsaturated zone of Yucca Mountain, Nevada, a proposed underground repository for storing high-level radioactive waste. The 500 to 700 meter thick unsaturated zone of Yucca Mountain consists of highly heterogeneous layers of anisotropic, fractured ash flow and air fall tuffs. Characterization of fluid flow and heat transfer through such a system has been a challenge due to the heterogeneities prevalent on various scales. Quantitative evaluation of water, gas, and heat flow by means of numerical simulation is essential for design and performance assessment of the repository. A three-dimensional numerical flow and transport model will be discussed. The model has been calibrated against field-measured data and takes into account the coupled processes of unsaturated flow and tracer transport in the highly heterogeneous, unsaturated fractured porous rock. The modeling approach of the model is based on a dual-continuum formulation of coupled multiphase fluid and tracer transport through fractured porous rock. As application examples, effects of current and future climates on the unsaturated zone processes are evaluated to aid in the assessment of the proposed repository's system performance.

We report the first kinematically complete study of the four-body fragmentation of the D2 molecule following absorption of a single photon. For equal energy sharing of the two electrons and a photon energy of 75.5 eV, we observed the relaxation of one of the selection rules valid for He photo-double ionization and a strong dependence of the electron angular distribution on the orientation of the molecular axis. This effect is reproduced by a model in which a pair of photoionization amplitudes is introduced for the light polarization parallel and perpendicular to the molecular axis.

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The performance of the SuperLig(R) 644 resin loading and elution was evaluated at 25, 35, and 45 degree C using a single-column containing 2.25 g of oven-dry, hydrogen form of SuperLig(R) 664 resin. A simulated Envelope A solution was used to mimic the composition of low-activity waste solution from Tank 241-AN-105 supernate in the Hanford Site waste tank. The simulant was spiked with small quantities of trace metals (cadmium, chromium, iron, and lead) to evaluate the effects of these metals on cesium sorption. The results from column tests performed at 25, 35, and 45 degree C showed that more than 100 BVs of simulated Envelope A solution could be processed at each temperature before 50 percent breakthrough of the cesium occurred.

Roof bolting is the most popular method for underground openings in the mining industry, especially in the bedded deposits such as coal, potash, salt etc. In fact, all U.S. underground coal mine entries are roof-bolted as required by law. However, roof falls still occur frequently in the roof bolted entries. The two possible reasons are: the lack of knowledge of and technology to detect the roof geological conditions in advance of mining, and lack of roof bolting design criteria for modern roof bolting systems. This research is to develop a method for predicting the roof geology and stability condition in real time during roof bolting operation. Based on such information, roof bolting design criteria for modern roof bolting systems will be developed for implementation in real time. In this quarter, the field, theoretical and programming works have been performed toward achieving the research goals set in the proposal. The selected site and the field testing plan enabled us to test all three aspects of roof geological features. The development of the data interpretation methodologies and the geology mapping computer program have also been preceding well.

While commodity computing and graphics hardware has increased in capacity and dropped in cost, it is still quite difficult to make effective use of such systems for general-purpose parallel visualization and graphics. We describe the results of a recent project that provides a software infrastructure suitable for general-purpose use by parallel visualization and graphics applications. Our work combines and extends two technologies: Chromium, a stream-oriented framework that implements the OpenGL programming interface; and OpenRM Scene Graph, a pipelined-parallel scene graph interface for graphics data management. Using this combination, we implement a sort-first, distributed memory, parallel volume rendering application. We describe the performance characteristics in terms of bandwidth requirements and highlight key algorithmic considerations needed to implement the sort-first system. We characterize system performance using a distributed memory parallel volume rendering application, a nd present performance gains realized by using scene specific knowledge to accelerate rendering through reduced network bandwidth. The contribution of this work is an exploration of general-purpose, sort-first architecture performance characteristics as applied to distributed memory, commodity hardware, along with a description of the algorithmic support needed to realize parallel, sort-first implementations.