A letter report issued by the Government Accountability Office with an abstract that begins "DOD spends $10 billion annually on multiyear procurement (MYP) contracts for weapons systems. MYPs may save money through more efficient relationships with suppliers and producers, but may also suffer losses if cancelled and can limit future budget flexibility. Recently, Congress has been concerned about DOD's management of the process and savings realized by MYPs. GAO was asked to evaluate DOD's review process for MYP candidates; examine MYP program outcomes; identify the impact of changes to MYP savings threshold guidance, and determine how much DOD validates MYP performance. To do this, GAO reviewed statutes and other guidance, held discussions with relevant officials, examined DOD budget justifications and contracts, and conducted limited case studies."

Testimony issued by the Government Accountability Office with an abstract that begins "The Department of Defense (DOD) has stewardship over an unprecedented amount of taxpayer money--with about $546 billion in discretionary budget authority provided thus far in fiscal year 2008, and total reported obligations of about $492 billion to support ongoing operations and activities related to the Global War on Terrorism from September 11, 2001, through September 2007. Meanwhile, DOD is solely responsible for 8 high-risk areas identified by GAO and shares responsibility for another 7 high-risk areas. GAO designated DOD's approach to business transformation as high risk in 2005. DOD's business systems modernization and financial management have appeared on the list since 1995. Deficiencies in these areas adversely affect DOD's ability, among other things, to assess resource requirements; control costs; ensure accountability; measure performance; prevent waste, fraud, and abuse; and address pressing management issues. Based on previously issued GAO reports and testimonies, this testimony focuses on the progress DOD has made and the challenges that remain with respect to overall business transformation, business systems modernization, and financial management capabilities improvements. GAO has made recommendations to improve DOD's business transformation efforts and DOD's institutional and program-specific management controls. DOD has …

Testimony issued by the Government Accountability Office with an abstract that begins "As the U.S. workforce has become increasingly diverse, many private and public sector organizations have recognized the importance of recruiting and retaining minority and women candidates for key positions. However, previous congressional hearings have raised concerns about a lack of diversity at the management level in the financial services industry, which provides services that are essential to the continued growth and economic prosperity of the country. This testimony discusses findings from a June 2006 GAO report and more recent work on diversity in the financial services industry. Specifically, GAO assesses (1) what the available data show about diversity at the management level from 1993 through 2006 and (2) steps that the industry has taken to promote workforce diversity and the challenges involved. To address the testimony's objectives, GAO analyzed data from the Equal Employment Opportunity Commission (EEOC); reviewed select studies; and interviewed officials from financial services firms, trade organizations, and organizations that represent minority and women professionals."

Testimony issued by the Government Accountability Office with an abstract that begins "Other transaction authority was created to enhance the federal government's ability to acquire cutting-edge science and technology by attracting nontraditional contractors that have not typically pursued government contracts. The Homeland Security Act of 2002 granted the department the temporary authority to enter into other transactions for research and prototype projects for a period of 5 years. The Consolidated Appropriations Act of 2008 extended this authority until September 30, 2008. This testimony discusses (1) the extent to which DHS has used its other transaction authority, (2) the status of DHS's implementation of GAO's previous recommendations, and (3) the accountability challenges associated with the use of these agreements."

Testimony issued by the Government Accountability Office with an abstract that begins "Today's remarks are based on our review of schedules and financial reports for the CVC project and related records maintained by AOC and its construction management contractor, Gilbane Building Company; our observations on the progress of work at the CVC construction site; and our discussions with the CVC team (AOC and its major CVC contractors), AOC's Chief Fire Marshal, and representatives from the U.S. Capitol Police. We also reviewed AOC's construction management contractor's periodic schedule assessments, potential change order log, and weekly reports on construction progress. In addition, we reviewed the contract modifications made to date."

This document describes a model for condensation of sulfuric acid aerosol given an initial concentration and/or source of gaseous sulfur trioxide (e.g. fuming from oleum). The model includes the thermochemical effects on aerosol condensation and air parcel buoyancy. Condensation is assumed to occur heterogeneously onto a preexisting background aerosol distribution. The model development is both a revisiting of research initially presented at the Fall 2001 American Geophysical Union Meeting [1] and a further extension to provide new capabilities for current atmospheric dispersion modeling efforts [2]. Sulfuric acid is one of the most widely used of all industrial chemicals. In 1992, world consumption of sulfuric acid was 145 million metric tons, with 42.4 Mt (mega-tons) consumed in the United States [10]. In 2001, of 37.5 Mt consumed in the U.S., 74% went into producing phosphate fertilizers [11]. Another significant use is in mining industries. Lawuyi and Fingas [7] estimate that, in 1996, 68% of use was for fertilizers and 5.8% was for mining. They note that H{sub 2}SO{sub 4} use has been and should continue to be very stable. In the United States, the elimination of MTBE (methyl tertiary-butyl ether) and the use of ethanol for gasoline production are further increasing …

We are developing the technique of spin-polarized photoelectron spectroscopy as a probe of electron correlation with the ultimate goal of resolving the Pu electronic structure controversy. Over the last several years, we have demonstrated the utility of spin polarized photoelectron spectroscopy for determining the fine details of the electronic structure in complex systems such as those shown in this report.

We report the successful identification of the type of the supernova responsible for the supernova remnant SNR 0509-675 in the Large Magellanic Cloud (LMC) using Gemini spectra of surrounding light echoes. The ability to classify outbursts associated with centuries-old remnants provides a new window into several aspects of supernova research and is likely to be successful in providing new constraints on additional LMC supernovae as well as their historical counterparts in the Milky Way Galaxy (MWG). The combined spectrum of echo light from SNR 0509-675 shows broad emission and absorption lines consistent with a supernova (SN) spectrum. We create a spectral library consisting of 26 SNe Ia and 6 SN Ib/c that are time-integrated, dust-scattered by LMC dust, and reddened by the LMC and MWG. We fit these SN templates to the observed light echo spectrum using {chi}{sup 2} minimization as well as correlation techniques, and we find that overluminous 91T-like SNe Ia with {Delta}m{sub 15} < 0.9 match the observed spectrum best.

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We have developed a highly accurate computational capability to calculate the equation of state (EOS) and defect formation energies of metallic systems. We are using a newly developed algorithm that enables the study of metallic systems with quantum Monte Carlo (QMC) methods. To date, technical limitations have restricted the application of QMC methods to semiconductors, insulators and the homogeneous electron gas. Using this new 'QMC for metals' we can determine, for the first time, the significance of correlation effects in the EOS and in the formation energies of point defects, impurities, surfaces and interfaces in metallic systems. These calculations go beyond the state-of-the-art accuracy which is currently obtained with Density Functional Theory approaches. Such benchmark calculations can provide more accurate predictions for the EOS and the formation energies of vacancies and interstitials in simple metals. These are important parameters in determining the mechanical properties as well as the micro-structural evolution of metals in irradiated materials or under extreme conditions. We describe the development of our 'QMC for metals' code, which has been adapted to run efficiently on a variety of computer architectures including BG/L. We present results of the first accurate quantum Monte Carlo calculation of an EOS of a …

The first objective of this proposal was to develop a fundamental understanding of how short-pulse (100 ps to 1 ns) laser parameters affect conditioning and damage initiation in KDP and DKDP crystals. In this study we experimentally determine the effect of short-pulse laser parameters including pulse duration, pulse shape, and fluence on conditioning effectiveness, pinpoint damage density, pinpoint size, and pinpoint morphology in crystals. Based on the experimental results we developed empirical models, which give insight into the underlying physics of energy deposition from short-pulse lasers in KDP and DKDP crystals. The second objective of this proposal was to explore the mechanisms by which energy is deposited during damage in SiO{sub 2}. We have measured how laser parameters such as pulse duration, pulse shape, wavelength, and fluence are relevant to energy deposition, for initiation and growth on the surface of SiO{sub 2} optics.

We have investigated the effect of partial isovalent anion substitution in Ga1-xMnxAs on electrical transport and ferromagnetism. Substitution of only 2.4percent of As by P induces a metal-insulator transition at a constant Mn doping of x=0.046 while the replacement of 0.4 percent As with N results in the crossover from metal to insulator for x=0.037. This remarkable behavior is consistent with a scenario in which holes located within an impurity band are scattered by alloy disorder in the anion sublattice. The shorter mean free path of holes, which mediate ferromagnetism, reduces the Curie temperature TC from 113 K to 60 K (100 K to 65 K) upon the introduction of 3.1 percent P (1percent N) into the As sublattice.

The Petascale Simulation Initiative LDRD project began in May 2004 and ended in April 2007. The overall goal of the project was to develop a computational model that would help LLNL simulation codes use petaflop-scale computers effectively, with specific emphasis on multiscale simulation. An early deliverable of the project was a report that surveyed a range of LLNL simulation codes so that the project would better understand their structure and needs. This report was titled 'Survey of Selected LLNL Unclassified Parallel Simulation Codes', UCRL-TR-207192. Based on the findings of this report, the project proceeded along two complementary paths. One goal was to develop a technique to reduce the amount of redundant calculation in a multiscale simulation by caching certain fine-scale simulation results as they were generated and then interpolating new values, where appropriate, based on cached data. This technique, which we call 'Adaptive Sampling', was successfully applied in a materials modeling simulation, and the results are detailed in a journal paper entitled 'Embedded polycrystal plasticity and adaptive sampling', UCRL-JRNL-226715. In this paper we showed an example multiscale simulation in which we were able to achieve a 40x speedup over the standard technique for doing the same problem and with very …

The Liquid Waste Organization (LWO) has requested that the Savannah River National Laboratory (SRNL) to assess the impact of a 100K gallon decant volume from Tank 40H on the existing sludge-only Sludge Batch 4 (SB4)-Frit 510 flowsheet and the coupled operations flowsheet (SB4 with the Actinide Removal Process (ARP)). Another potential SB4 flowsheet modification of interest includes the addition of 3 wt% sodium (on a calcined oxide basis) to a decanted sludge-only or coupled operations flowsheet. These potential SB4 flowsheet modifications could result in significant compositional shifts to the SB4 system. This paper study provides an assessment of the impact of these compositional changes to the projected glass operating windows and to the variability study for the Frit 510-SB4 system. The influence of the compositional changes on melt rate was not assessed in this study nor was it requested. Nominal Stage paper study assessments were completed using the projected compositions for the various flowsheet options coupled with Frit 510 (i.e., variation was not applied to the sludge and frit compositions). In order to gain insight into the impacts of sludge variation and/or frit variation (due to the procurement specifications) on the projected operating windows, three versions of the Variation Stage …

Photoelectron Spectroscopy (PES) and X-ray Absorption Spectroscopy (XAS, Figure 1) have contributed greatly to our improved understanding of Pu electronic structure. From these and related measurements, the following has been determined: (1) The Pu 5f spin-orbit splitting is large; (2) The number of Pu5f electrons is near 5; and (3) The Pu 5f spin-orbit splitting effect dominates 5f itineracy. Significant questions remain concerning the nature of Pu electronic structure. Perhaps the missing piece of the puzzle is the direct experimental determination of the unoccupied electronic structure using high energy inverse photoelectron spectroscopy or Bremstrahlung Isochromat Spectroscopy (BIS). Past BIS studies of Th and U indicate the feasibility and utility of Pu studies.

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We demonstrate that interference of ultra-fast pulses of laser light can create regular patterns in thin silicon membranes that are compatible with the formation of a uniform array of nanopores. The spacing and size of these pores can be tuned by changing the laser energy, wavelength and number of ultra-short pulses. Short pulses and wavelengths ({approx}550 nm and smaller) are needed to define controllable nanoscale features in silicon. Energy must be localized in time and space to produce the etching, ablation or amorphization effects over the {approx}100 nm length scales appropriate for definition of single pores. Although in this brief study pattern uniformity was limited by laser beam quality, a complementary demonstration reported here used continuous-wave interferometric laser exposure of photoresist to show the promise of the ultra-fast approach for producing uniform pore arrays. The diameters of these interferometrically-defined features are significantly more uniform than the diameters of pores in state-of-the-art polycarbonate track etch membranes widely used for molecular separations.

Free weekly newspaper that includes business and classified advertising.

Free weekly newspaper that includes business and classified advertising.

Daily student newspaper from the University of North Texas in Denton, Texas that includes local, state and campus news along with advertising.

Weekly Jewish newspaper from Fort Worth, Texas that includes local, state and national news along with extensive advertising.

Semi-weekly newspaper from Bastrop, Texas that includes local, state and national news along with advertising.

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

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