Correspondence issued by the Government Accountability Office with an abstract that begins "Science establishes research priorities within and across its six core interdisciplinary research programs, which include a wide variety of research ranging from biology to particle physics. However, Science does not explicitly rank these programs in terms of priority. The office currently prioritizes research that aligns with the Secretary of Energy’s interest in fostering the development of clean energy technologies. For example, Science supports research in materials sciences, which informs technology development of batteries and fuels cells. According to Science’s Deputy Director for Science Programs, the office remains committed to all of its research programs and, in the case of stable or declining budgets, does not intend to limit funding reductions to certain programs. Science formalizes priorities annually through the budget formulation process."

A letter report issued by the Government Accountability Office with an abstract that begins "After studying the Joint Capabilities Integration and Development System (JCIDS) process since September 2010, the Joint Staff began initiating actions in October 2011 to better prioritize capability needs and align those needs with available budgetary resources. Specifically, according to Joint Staff officials, the Joint Requirements Oversight Council (JROC) has begun to consider the benefits and affordability of new capabilities within the context of joint capability areas and to evaluate possible duplication before validating new capability requirements. The Joint Staff has begun to implement a new approach to support JROC prioritization of capability needs, but the new approach is still evolving and has not been fully developed and clearly documented. New guidance does not clearly outline goals of the new approach, develop and communicate the analytic approach envisioned to support JROC decision making, or set out criteria and accompanying measures of progress. GAO previously reported that JCIDS’s ability to prioritize needs could be improved if it had an analytic approach to reviewing and validating proposals that would help ensure that the most important capability needs of the department are addressed. Until the Joint Staff takes steps to …

A letter report issued by the Government Accountability Office with an abstract that begins "The Office of Management and Budget (OMB), agencies, and interagency statistical committees have distinct roles in identifying opportunities to improve federal information collection efforts. OMB exercises several authorities that promote the system’s efficiency, including overseeing and approving agency information collections. The website Reginfo.gov provides the public with information, such as cost and burden, on collections that OMB reviews, though GAO’s review identified some discrepancies in selected items. OMB periodically issues guidance to agencies on complying with federal requirements for information collections, but this guidance generally does not prescribe specific actions to take. GAO’s analysis of agencies’ documentation of active surveys indicated that 77 percent included detailed descriptions of efforts to identify duplication, while those that did not tended to be for collections that are unlikely to duplicate existing information; and 75 percent reported actions beyond those required by statute to solicit external input. OMB, through enhanced guidance, could promote additional awareness of options agencies can take to identify duplication and solicit input. Interagency committees, which primarily draw members from the 13 agencies that have statistics as their primary focus, are particularly important in helping ensure collaboration. …

Free weekly newspaper that includes business and classified advertising.

Free weekly newspaper that includes business and classified advertising.

Bi-weekly student newspaper from Abilene Christian University in Abilene, Texas that includes local, state and campus news along with advertising.

Weekly newspaper from Dallas, Texas that includes local, state, and national news and advertising of interest to the Lesbian, Gay, Bisexual, and Transgender (LGBT) community.

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Pursuant to the Arrangement between the European Commission DG Joint Research Centre (EC-JRC) and the Department of Energy (DOE) to continue cooperation on research, development, testing, and evaluation of technology, equipment, and procedures in order to improve nuclear material control, accountancy, verification, physical protection, and advanced containment and surveillance technologies for international safeguards, dated 1 September 2008, the IRMM and LLNL established cooperation in a program on the Study of Chemical Changes in Uranium Oxyfluoride Particles under IRMM-LLNL Action Sheet 36. The work under this action sheet had 2 objectives: (1) Achieve a better understanding of the loss of fluorine in UO{sub 2}F{sub 2} particles after exposure to certain environmental conditions; and (2) Provide feedback to the EC-JRC on sample reproducibility and characteristics.

This report provides a summary of the effects of aging on and the expected forms of plutonium in Tank 18 waste residues. The findings are based on available information on the operational history of Tank 18, reported analytical results for samples taken from Tank 18, and the available scientific literature for plutonium under alkaline conditions. These findings should apply in general to residues in other waste tanks. However, the operational history of other waste tanks should be evaluated for specific conditions and unique operations (e.g., acid cleaning with oxalic acid) that could alter the form of plutonium in heel residues. Based on the operational history of other tanks, characterization of samples from the heel residues in those tanks would be appropriate to confirm the form of plutonium. During the operational period and continuing with the residual heel removal periods, Pu(IV) is the dominant oxidation state of the plutonium. Small fractions of Pu(V) and Pu(VI) could be present as the result of the presence of water and the result of reactions with oxygen in air and products from the radiolysis of water. However, the presence of Pu(V) would be transitory as it is not stable at the dilute alkaline conditions that …

The objectives of this work are the following: (1) The application of micro and mesoscale modeling techniques to study dislocation properties in ferritic and W-based materials; and (2) The development of computational models and tools to study damage accumulation in >1 dpa (fusion-like) conditions, both for Fe and W-based alloys. The high-temperature strength of structural ferritic alloys (ferritic/martensitic steels, ODS steels, bcc refractory alloys) hinges on the thermal stability of second phase particles and their interactions with dislocations. Irradiation damage can modify the structure and stability of both the particles and dislocations, particularly by the introduction of gas atoms, point defects and point defect clusters. The three aspects of materials strength that we are studying are: (a) Computation of dislocation mobility functions (stress-velocity relations) as a function of temperature and dislocation character. This will be done via molecular dynamics (MD) simulations of single dislocation motion under applied shear stress. This is a fundamental input to dislocation dynamics (DD) simulations and also provides fundamental insights into the high-temperature plastic behavior of ferritic materials. (b) Simulations of dislocation-obstacle interactions using MD and DD. This subtask includes simulating the effect on dislocation glide of precipitates (e.g., {alpha}' Cr precipitates), ODS particles, and irradiation …

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The Hanford Site has 28 double-shell tanks (DSTs) and 149 single-shell tanks (SSTs) containing radioactive wastes that are complex mixes of radioactive and chemical products. The mission of the Department of Energy's River Protection Project is to retrieve and treat the Hanford tank waste for disposal and close the tank farms. A key aspect of the mission is to retrieve and transfer waste from the SSTs, which are at greater risk for leaking, into DSTs for interim storage until the waste is transferred to and treated in the Waste Treatment and Immobilization Plant. There is, however, limited space in the existing DSTs to accept waste transfers from the SSTs, and approaches to overcoming the limited DST space will benefit the overall mission. The purpose of this study is to summarize and analyze the key previous experiment that forms the basis for the relaxed controls and to summarize progress and results on new experiments focused on understanding the conditions that result in low gas retention. The previous large-scale test used about 50 m3 of sediment, which would be unwieldy for doing multiple parametric experiments. Accordingly, experiments began with smaller-scale tests to determine whether the desired mechanisms can be studied without the …

Free weekly newspaper that includes business and classified advertising.

Understanding the behavior of real complex networks is of great theoretical and practical significance. It includes developing accurate artificial models whose topological properties are similar to the real networks, generating the artificial networks at different scales under special conditions, investigating a network dynamics, reconstructing missing data, predicting network response, detecting anomalies and other tasks. Network generation, reconstruction, and prediction of its future topology are central issues of this field. In this project, we address the questions related to the understanding of the network modeling, investigating its structure and properties, and generating artificial networks. Most of the modern network generation methods are based either on various random graph models (reinforced by a set of properties such as power law distribution of node degrees, graph diameter, and number of triangles) or on the principle of replicating an existing model with elements of randomization such as R-MAT generator and Kronecker product modeling. Hierarchical models operate at different levels of network hierarchy but with the same finest elements of the network. However, in many cases the methods that include randomization and replication elements on the finest relationships between network nodes and modeling that addresses the problem of preserving a set of simplified properties do …

Photograph taken at a performance of Frederick Douglass Now, starring Roger Guenveur Smith.

Photograph taken at a performance of Frederick Douglass Now, starring Roger Guenveur Smith.

Photograph taken at a performance of Frederick Douglass Now, starring Roger Guenveur Smith.

Photograph taken at a performance of Frederick Douglass Now, starring Roger Guenveur Smith.

Photograph taken at a performance of Frederick Douglass Now, starring Roger Guenveur Smith.

Photograph taken at a performance of Frederick Douglass Now, starring Roger Guenveur Smith.

Photograph taken at a performance of Frederick Douglass Now, starring Roger Guenveur Smith.

Photograph taken at a performance of Frederick Douglass Now, starring Roger Guenveur Smith.

Photograph taken at a performance of Frederick Douglass Now, starring Roger Guenveur Smith.