A letter report issued by the Government Accountability Office with an abstract that begins "As required by Congress, the U.S. Postal Service (Service) has issued three fundraising stamps--also called semipostals--which are sold at a higher price than First-Class stamps, with the difference distributed to designated federal agencies for specific causes. The proceeds from the three stamps are to fund breast cancer research, assistance to families of emergency relief personnel killed or permanently disabled in the terrorist attacks of September 11, and services to children exposed to domestic violence. Of the three stamps, the Breast Cancer Research stamp is the only semipostal currently being sold. GAO has issued three prior reports on semipostals. To provide Congress updated information, GAO examined (1) the amount of money that has been raised through the sale of semipostals, and (2) how the designated federal agencies have used the proceeds and reported the results."

A letter report issued by the Government Accountability Office with an abstract that begins "Randolph-Sheppard and Javits-Wagner-O'Day (JWOD) are two federal programs that provide employment for persons with disabilities through federal contracts. In 2006, participants in the two programs had contracts with the Department of Defense (DOD) worth $465 million annually to provide dining services at military dining facilities. The 2007 National Defense Authorization Act directed GAO to study the two programs. This report examines (1) differences in how the Randolph-Sheppard and JWOD programs provide food services for DOD and (2) differences in how contracts are awarded, prices are set, and program beneficiaries (i.e. persons with disabilities) are compensated. GAO interviewed program officials, conducted a survey of states with Randolph-Sheppard programs, and reviewed eight Randolph-Sheppard and six JWOD contracts."

Testimony issued by the Government Accountability Office with an abstract that begins "Since 2003, the Congress has obligated nearly $400 billion for U.S. efforts in Iraq, of which about $40 billion has supported reconstruction and stabilization efforts. Congressional oversight of this substantial investment is crucial as the Administration requests additional military and economic funds for Iraq. This testimony summarizes the results of recent GAO audit work and proposes three areas for which continued oversight is needed: (1) progress in improving security and national reconciliation, (2) efforts to develop clear U.S. strategies, and (3) Iraqi and international contributions to economic development. We reviewed U.S. agency documents and interviewed agency officials, including the departments of State, Defense, and Treasury; and the U.S. Agency for International Development; the UN; and the Iraqi government. We also made multiple trips to Iraq as part of this work."

A letter report issued by the Government Accountability Office with an abstract that begins "In general, a fusion center is a collaborative effort to detect, prevent, investigate, and respond to criminal and terrorist activity. Recognizing that fusion centers are a mechanism for information sharing, the federal government--including the Department of Homeland Security (DHS), the Department of Justice (DOJ), and the Program Manager for the Information Sharing Environment (PM-ISE), which has primary responsibility for governmentwide information sharing and is located in the Office of the Director of National Intelligence--is taking steps to partner with fusion centers. In response to Congressional request, GAO examined (1) the status and characteristics of fusion centers and (2) to what extent federal efforts help alleviate challenges the centers identified. GAO reviewed center-related documents and conducted interviews with officials from DHS, DOJ, and the PM-ISE, and conducted semistructured interviews with 58 state and local fusion centers. The results are not generalizable to the universe of fusion centers. Data are not available on the total number of local fusion centers."

Testimony issued by the Government Accountability Office with an abstract that begins "Because the safety and economic security of the United States depend in substantial part on the security of its 361 seaports, the United States has a vital national interest in maritime security. The Security and Accountability for Every Port Act (SAFE Port Act), modified existing legislation and created and codified new programs related to maritime security. The Department of Homeland Security (DHS) and its U.S. Coast Guard, Transportation Security Administration, and U.S. Customs and Border Protection have key maritime security responsibilities. This testimony synthesizes the results of GAO's completed work and preliminary observations from GAO's ongoing work related to the SAFE Port Act pertaining to (1) overall port security, (2) security at individual facilities, and (3) cargo container security. To perform this work GAO visited domestic and overseas ports; reviewed agency program documents, port security plans, and post-exercise reports; and interviewed officials from the federal, state, local, private, and international sectors."

Testimony issued by the Government Accountability Office with an abstract that begins "The United States has become increasingly involved in stabilization and reconstruction operations as evidenced in the Balkans, Haiti, Somalia, Iraq, and Afghanistan. In December 2005, the President issued National Security Presidential Directive 44, establishing governmentwide policy for coordinating, planning, and implementing U.S. stabilization and reconstruction assistance to affected foreign entities. This testimony addresses stabilization and reconstruction issues related to (1) State Department (State) efforts to improve interagency planning and coordination, (2) Department of Defense (DOD) efforts to enhance its capabilities and planning, and (3) State efforts to develop civilian capabilities. GAO's statement is based on its May 2007 report on DOD stability operations and preliminary observations related to State's interagency planning framework and civilian response capabilities."

Previous Bechtel National, Incorporated (BNI)-sponsored studies have targeted optimizing sodium permanganate for the selective oxidation of chromium from washed Hanford tank sludges (Rapko et al. 2004; Rapko et al. 2005). The recommendation from previous work was that contact with sodium permanganate in a minimally caustic solution, i.e., 0.1 to 0.25 M [OH-] initially, provided maximum Cr dissolution while minimizing concomitant Pu dissolution. At the request of BNI, further work on oxidative alkaline leaching was performed.

It is well known that U-6wt.% Nb (U-14at.% Nb) alloy has a microstructure containing martensitic phases supersaturated with Nb that can be obtained by rapid quenching the alloy from {gamma} (bcc)-field solid solution to room temperature. The high cooling rate forces the {gamma}-phase solid solution to transform to variants of the low-temperature {alpha} (orthorhombic) phase in which Nb is forced to retain in the supersaturated solid solution. However, the crystal lattice of supersaturated solution formed by rapid quenching is in unstable conditions and is severely distorted since the solubility of Nb in the {alpha} phase at room temperature is nearly zero under an equilibrium condition. Two variant phases, a monoclinic distortion of {alpha} phase that is designated as {alpha}{double_prime} martensite and a tetragonal distortion of {gamma} phase that is designated as {gamma}{sup o} phase, can form in the as-quenched alloy, as shown in Fig. 1. We have learned from our previous TEM studies on the low-temperature aging of a water-quenched U6Nb (WQ-U6Nb) alloy that there are two possible transformation pathways for phase decomposition of the alloy supersaturated with 14 at.% of Nb upon aging at temperatures below 200 C, i.e., (1) supersaturated solid solution {alpha}{double_prime} {yields} spinodal decomposition {yields} {alpha}{sub …

The factors affecting the optimal water chemistry of the Savannah River Site spent fuel storage basin must be determines in order to optimize facility efficiency, minimize fuel corrosion, and reduce overall environmental impact from long term spent nuclear fuel storage at the Savannah River Site. The Savannah River National Laboratory is using statistically designed experiments to study the effects of NO{sub 3}{sup -}, SO{sub 4}{sup 2-}, and Cl{sup -} concentrations on alloys commonly used not only as fuel cladding, but also as rack construction materials The results of cyclic polarization pitting and corrosion experiments on samples of Al 6061 and 1100 alloys will be used to construct a predictive model of the basin corrosion and its dependence on the species in the basin. The basin chemistry model and corrosion will be discussed in terms of optimized water chemistry envelope and minimization of cladding corrosion.

The purpose of this report is to provide a concise but comprehensive overview of Atmospheric Radiation Measurement (ARM) Climate Research Facility (ACRF) instrumentation status. The report is divided into the following four sections: (1) new instrumentation in the process of being acquired and deployed, (2) existing instrumentation and progress on improvements or upgrades, (3) proposed future instrumentation, and (4) SBIR instrument development.

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On October 30, 2007, the U.S. Department of Energy’s (DOE) Atmospheric Radiation Measurement (ARM) Climate Research Facility (ACRF) sponsored an all-day workshop to assess the status of the ACRF Archive. Focus areas included usability of current functions, plans for revised functions, proposals for new functions, and an overarching discussion of new ideas. Although 13 scientists familiar with ACRF and the ARM Program were invited to the workshop, only 10 scientists were available to attend the workshop. ACRF consists of the infrastructure that was developed to support the ARM Program and includes the ACRF Archive (previously called the ARM Archive). The scientists who participated in the meeting ranged from those who used the Archive frequently to those who seldom or never had accessed the Archive. The group was spread across disciplines, i.e. modelers, conservationists, and others from universities and government laboratories. A few of the participants were funded by the ARM Program, but most were not funded currently by ARM. During the past year, several improvements were made to the ACRF Archive to link it with the ARM/ACRF web pages, add a shopping cart feature, and expand on search parameters. Additional modifications have been proposed and prototypes of these proposals were …

The analysis of coherent structures in Rayleigh-Taylor simulations is a challenging task as the lack of a precise definition of these structures is compounded by the massive size of the datasets. In an earlier work, we used techniques from image analysis to count these coherent structures in two high-resolution simulations, one a large-eddy simulation with 30 terabytes of analysis data, and the other a direct numerical simulation with 80 terabytes of analysis data. Our analysis indicated that there were four distinct regimes in the process of the mixing of the two fluids, starting from the initial linear stage, followed by the non-linear stage with weak turbulence, the mixing transition stage, and the final stage of strong turbulence. In this paper, we extend our earlier work to focus on only the rising bubbles and the falling spikes. We first consider different ways in which we can constrain the bubble and spike definitions and then extract various statistics on them. Our results on the rising bubble and falling spike counts again show that there are four regimes in the process of fluid mixing, each characterized by an integer-valued slope. Further, the average bubble heights and spike depths are related to similar results …

We present a modification of the closed-loop state space model for AO control which allows delays that are a non-integer multiple of the system frame rate. We derive the new forms of the Predictive Fourier Control Kalman filters for arbitrary delays and show that they are linear combinations of the whole-frame delay terms. This structure of the controller is independent of the delay. System stability margins and residual error variance both transition gracefully between integer-frame delays.

The GNEP program envisions continuing the use of light-water reactors (LWRs), with the addition of processing the discharged, or spent, LWR fuel to recover actinide and fission product elements, and then recycling the actinide elements in sodium-cooled fast reactors. Previous work has established the relationship between the processing efficiencies of spent LWR fuel, as represented by spent PWR fuel, and the potential increase in repository utilization for the resulting processing waste. The purpose of this current study is to determine a similar relationship for the waste from processing spent fast reactor fuel, and then to examine the wastes from the combination of LWRs and fast reactors as would be deployed with the GNEP approach.

Gen-IV activities in France, Japan and US focus on the development of new structural materials for Gen-IV nuclear reactors. Oxide dispersion strengthened (ODS) F/M steels have raised considerable interest in nuclear applications. Promising collaborations can be established seeking fundamental knowledge of relevant Gen-IV ODS steel properties (see attached travel report on MATGEN- IV 'Materials for Generation IV Nuclear Reactors'). Major highlights refer to results on future Ferritic/Martensitic steel cladding candidates (relevant to Gen-IV materials properties for LFR Materials Program) and on thermodynamic and mechanic behavior of metallic FeCr binary alloys, base matrix for future candidate steels (for the LLNL-LDRD project on Critical Issues on Materials for Gen-IV Reactors).

In this work, we present the first successful demonstration of a non-contact technique to precisely measure the 3D spatial characteristics of laser induced surface damage sites in fused silica for large aperture laser systems by employing Optical Coherence Tomography (OCT). What makes OCT particularly interesting in the characterization of optical materials for large aperture laser systems is that its axial resolution can be maintained with working distances greater than 5 cm, whether viewing through air or through the bulk of thick optics. Specifically, when mitigating surface damage sites against further growth by CO{sub 2} laser evaporation of the damage, it is important to know the depth of subsurface cracks below the damage site. These cracks are typically obscured by the damage rubble when imaged from above the surface. The results to date clearly demonstrate that OCT is a unique and valuable tool for characterizing damage sites before and after the mitigation process. We also demonstrated its utility as an in-situ diagnostic to guide and optimize our process when mitigating surface damage sites on large, high-value optics.

A RANS/DES numerical procedure with an extended Lax-Wendroff control-volume scheme and turbulence model is described for the accurate simulation of internal/external axisymmetric flow with and without strong rotation. This new procedure is an extension, from Cartesian to cylindrical coordinates, of (1) a second order accurate multi-grid, control-volume integration scheme, and (2) a k-{omega} turbulence model. This paper outlines both the axisymmetric corrections to the mentioned numerical schemes and the developments of techniques pertaining to numerical dissipation, multi-block connectivity, parallelization, etc. Furthermore, analytical and experimental case studies are presented to demonstrate accuracy and computational efficiency. Notes are also made toward numerical stability of highly rotational flows.

The survey activities consisted of visual inspections and radiological surveys including beta and gamma surface scans and surface beta activity measurements.

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A tip-based approach to shaping surfaces of soluble materials with nanometer-scale control is reported. The proposed method can be used, for example, to eliminate defects and inhomogeneities in surface shape, repair mechanical or laser-induced damage to surfaces, or perform 3D lithography on the length scale of an AFM tip. The phenomenon that enables smoothing and repair of surfaces is based on the transport of material from regions of high- to low-curvature within the solution meniscus formed in a solvent-containing atmosphere between the surface in question and an AFM tip scanned over the surface. Using in situ AFM measurements of the kinetics of surface remodeling on KDP (KH{sub 2}PO{sub 4}) crystals in humid air, we show that redistribution of solute material during relaxation of grooves and mounds is driven by a reduction in surface free energy as described by the Gibbs-Thomson law. We find that the perturbation from a flat interface evolves according to the diffusion equation where the effective diffusivity is determined by the product of the surface stiffness and the step kinetic coefficient. We also show that, surprisingly, if the tip is instead scanned over or kept stationary above an atomically flat area of the surface, a convex structure …

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