The nature of non-baryonic dark matter is one of the most intriguing questions for particle physics at the start of the 21st century. There is ample evidence for its existence, but almost nothing is known of its properties. WIMPs are a very appealing candidate particle and several experimental campaigns are underway around the world to search for these particles via the nuclear recoils that they should induce. The COUPP series of bubble chambers has played a significant role in the WIMP search. Through a sequence of detectors of increasing size, a number of R&D issues have arisen and been solved, and the technology has now been advanced to the point where the construction of large chambers requires a modest research effort, some development, but mostly just engineering. It is within this context that we propose to build the next COUPP detector - COUPP-500, a ton scale device to be built over the next three years at Fermilab and then deployed deep underground at SNOLAB. The primary advantages of the COUPP approach over other technologies are: (1) The ability to reject electron and gamma backgrounds by arranging the chamber thermodynamics such that these particles do not even trigger the detector. (2) …

We used LCLS pulses to excite thin-film and bulk graphite with various different microstructures, and probed the ultrafast ion and electron dynamics through Bragg and x-ray Thomson scattering (XRTS). We pioneered XRTS at LCLS, making this technique viable for other users. We demonstrated for the first time that the LCLS can be used to characterize warm-dense-matter through Bragg and x-ray Thomson scattering. The warm-dense-matter conditions were created using the LCLS beam. Representative examples of the results are shown in the Figure above. In our experiment, we utilized simultaneously both Bragg and two Thomson spectrometers. The Bragg measurements as a function of x-ray fluence and pulse length allows us to characterize the onset of atomic motion at 2 keV with the highest resolution to date. The Bragg detector was positioned in back-reflection, providing us access to scattering data with large scattering vectors (nearly 4{pi}/{lambda}). We found a clear difference between the atomic dynamics for 70 and 300 fs pulses, and we are currently in the process of comparing these results to our models. The outcome of this comparison will have important consequences for ultrafast diffractive imaging, for which it is still not clear if atomic resolution can truly be achieved. The …

The goal of this Phase I project was to establish a quantitative foundation for development of binary G-gels for large-scale, commercial processing of SWNTs and to develop scientific insight into the underlying mechanisms of solubilization, selectivity and alignment. In order to accomplish this, we performed systematic studies to determine the effects of G-gel composition and experimental conditions that will enable us to achieve our goals that include (1) preparation of ultra-high purity SWNTs from low-quality, commercial SWNT starting materials, (2) separation of MWNTs from SWNTs, (3) bulk, non-destructive solubilization of individual SWNTs in aqueous solution at high concentrations (10-100 mg/mL) without sonication or centrifugation, (4) tunable enrichment of subpopulations of the SWNTs based on metallic vs. semiconductor properties, diameter, or chirality and (5) alignment of individual SWNTs.

Porous materials such as zeolites, activated carbon, silica gels, alumina and a number of industrial catalysts are compared and ranked for hydrogen and deuterium adsorption at liquid nitrogen temperature. All samples show higher D{sub 2} adsorption than that of H{sub 2}, in which a HY sample has the greatest isotopic effect while 13X has the highest hydrogen uptake capacity. Material's moisture content has significant impact to its hydrogen uptake. A material without adequate drying could result in complete loss of its adsorption capacity. Even though some materials present higher H{sub 2} adsorption capacity at full pressure, their adsorption at low vapor pressure may not be as good as others. Adsorption capacity in a dynamic system is much less than in a static system. A sharp desorption is also expected in case of temperature upset.

Theory predicts that with an ultrashort and extremely bright coherent X-ray pulse, a single diffraction pattern may be recorded from a large macromolecule, a virus, or a cell before the sample explodes and turns into a plasma. Here we report the first experimental demonstration of this principle using the FLASH soft X-ray free-electron laser. An intense 25 fs, 4 x 10{sup 13} W/cm{sup 2} pulse, containing 10{sup 12} photons at 32 nm wavelength, produced a coherent diffraction pattern from a nano-structured non-periodic object, before destroying it at 60,000 K. A novel X-ray camera assured single photon detection sensitivity by filtering out parasitic scattering and plasma radiation. The reconstructed image, obtained directly from the coherent pattern by phase retrieval through oversampling, shows no measurable damage, and extends to diffraction-limited resolution. A three-dimensional data set may be assembled from such images when copies of a reproducible sample are exposed to the beam one by one.

Various studies in different countries have shown that significant energy-efficiency improvement opportunities exist in the industrial sector, many of which are cost-effective. These energy-efficiency options include both cross-cutting as well as sector-specific measures. However, industrial plants are not always aware of energy-efficiency improvement potentials. Conducting an energy audit is one of the first steps in identifying these potentials. Even so, many plants do not have the capacity to conduct an effective energy audit. In some countries, government policies and programs aim to assist industry to improve competitiveness through increased energy efficiency. However, usually only limited technical and financial resources for improving energy efficiency are available, especially for small and medium-sized enterprises. Information on energy auditing and practices should, therefore, be prepared and disseminated to industrial plants. This guidebook provides guidelines for energy auditors regarding the key elements for preparing for an energy audit, conducting an inventory and measuring energy use, analyzing energy bills, benchmarking, analyzing energy use patterns, identifying energy-efficiency opportunities, conducting cost-benefit analysis, preparing energy audit reports, and undertaking post-audit activities. The purpose of this guidebook is to assist energy auditors and engineers in the plant to conduct a well-structured and effective energy audit.

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The Defense Waste Processing Facility (DWPF), which is operated by Savannah River Remediation, LLC (SRR), has recently begun processing Sludge Batch 6 (SB6) by combining it with Frit 418 at a nominal waste loading (WL) of 36%. A unique feature of the SB6/Frit 418 glass system, as compared to the previous glass systems processed in DWPF, is that thorium will be a reportable element (i.e., concentrations of elemental thorium in the final glass product greater than 0.5 weight percent (wt%)) for the resulting wasteform. Several activities were initiated based upon this unique aspect of SB6. One of these was an investigation into the impact of thorium on the models utilized in DWPF's Product Composition and Control System (PCCS). While the PCCS is described in more detail below, for now note that it is utilized by Waste Solidification Engineering (WSE) to evaluate the acceptability of each batch of material in the Slurry Mix Evaporator (SME) before this material is passed on to the melter. The evaluation employs models that predict properties associated with processability and product quality from the composition of vitrified samples of the SME material. The investigation of the impact of thorium on these models was conducted by Peeler …

Given the large potential impact broadband access may have on the economic development of rural America, concern has been raised over a "digital divide" between rural and urban or suburban areas with respect to broadband deployment. While there are many examples of rural communities with state of the art telecommunications facilities, recent surveys and studies have indicated that, in general, rural areas tend to lag behind urban and suburban areas in broadband deployment. This report provides information on the background of broadband in rural American, pilot broadband loan and grant programs, community connect broadband grants, criticisms of the broadband programs, issues during reauthorization, appropriations, and American Recovery and Reinvestment Act.

This report focuses on the distribution of ARRA broadband funding with respect to project category, broadband infrastructure technology deployed, and state-by-state distribution.

This report discusses the budget for the 2008 Farm Bill, and its reauthorization. Moreover, the report discusses the increasing level of demand for fiscal constraint and the current large budget deficits.

A letter report issued by the Government Accountability Office with an abstract that begins "In 1992, Congress banned schools participating in federal student aid programs from paying commissions, bonuses, or other financial incentives to individuals based on their success in enrolling students or securing their financial aid. The ban applies to all postsecondary schools, including private for-profit, public, and private nonprofit schools. Congress instituted this incentive compensation ban to eliminate deceptive recruiting practices and to protect federal student aid funds from fraud and abuse. However, we recently found evidence of deceptive or fraudulent recruitment practices at certain postsecondary schools in which school officials misrepresented programs or encouraged students to falsify their financial aid applications to obtain federal student aid. Questions have been raised about whether schools are consistently acting in the best interest of students during the recruitment process, and whether the federal investment in student aid is adequately protected. The U.S. Department of Education (Education) is responsible for monitoring schools participating in federal student aid programs and enforcing compliance with the incentive compensation ban. Education has the authority to assess fines or take other actions against schools found violating the ban. In the Higher Education Opportunity Act, Congress mandated …

A letter report issued by the Government Accountability Office with an abstract that begins "The National Nuclear Security Administration's (NNSA) Tritium Readiness Program aims to establish an assured domestic source of tritium--a key isotope used in nuclear weapons--in order to maintain the U.S. nuclear weapons stockpile. Because tritium decays at a rate of 5.5 percent annually, it must be periodically replenished in the stockpile. However, since 2003, NNSA's efforts to produce tritium have been hampered by technical challenges. In this context, GAO was asked to (1) determine the extent to which NNSA has been able to overcome technical challenges producing tritium, (2) determine the extent to which NNSA is able to meet current and future nuclear weapons stockpile requirements for tritium, and (3) assess the management of NNSA's Tritium Readiness Program. To do this, GAO visited facilities involved in tritium production and reviewed tritium requirements established by NNSA and the Department of Defense, among other things."

A letter report issued by the Government Accountability Office with an abstract that begins "Among its responsibilities for aviation safety, the Federal Aviation Administration (FAA) issues thousands of certificates and approvals annually. These certificates and approvals, which FAA bases on its interpretation of federal standards, indicate that such things as new aircraft, the design and production of aircraft parts and equipment, and new air operators are safe for use in the national airspace system. Past studies and industry spokespersons assert that FAA's interpretations produce variation in its decisions and inefficiencies that adversely affect the industry. GAO was asked to examine the (1) extent of variation in FAA's interpretation of standards for certification and approval decisions and (2) views of key stakeholders and experts on how well these processes work. To perform the study, GAO reviewed industry studies and reports and FAA documents and processes; convened a panel of aviation experts; and interviewed officials from various industry sectors, senior FAA officials, and unions representing FAA staff."

A letter report issued by the Government Accountability Office with an abstract that begins "The Department of Defense (DOD) invests billions of dollars annually to modernize its business systems, which have been on GAO's high-risk list since 1995. DOD is in the process of implementing nine enterprise resource planning (ERP) efforts which perform business-related tasks such as general ledger accounting and supply chain management. These efforts are essential to transforming DOD's business operations. GAO was asked to (1) provide the status of the ERPs as of December 31, 2009; (2) determine whether selected ERPs followed schedule and cost best practices; and (3) determine if DOD has defined the performance measures to assess whether the ERPs will meet their intended business capabilities. To accomplish these objectives, GAO reviewed data on the status of each ERP from the program management officers and interviewed the DOD and military departments' chief management officers."

Correspondence issued by the Government Accountability Office with an abstract that begins "Scientific and technological innovation and a workforce educated in advanced technology are critical to the long-term economic competitiveness and prosperity of the United States. In recent years, leaders in government, business, and education have reported their concerns that declining federal funding for basic scientific research could diminish the United States' future economic competitiveness. These leaders have also reported their concerns that our educational system is producing too few students trained in the fields of science, technology, engineering, and mathematics (STEM), which they believe may drive jobs in technical fields--followed by jobs in manufacturing, administration, and finance--from the United States to other countries. Congress passed the America Creating Opportunities to Meaningfully Promote Excellence in Technology, Education, and Science Act (COMPETES Act) of 2007 with the overall goal of increasing federal investment in scientific research to improve U.S. economic competitiveness. To that end, the act also increased support for education in STEM fields. Specifically, the act authorized $33.6 billion from fiscal year 2008 through fiscal year 2010, in appropriations to be spent by four federal agencies: (1) the Department of Education, (2) the Department of Energy (DOE), (3) the National …

Daily publication of the U.S. Office of the Federal Register contains rules and regulations, proposed legislation and rule changes, and other notices, including "Presidential proclamations and Executive Orders, Federal agency documents having general applicability and legal effect, documents required to be published by act of Congress, and other Federal agency documents of public interest" (p. ii). Table of Contents starts on page iii.

This report discusses whether the current food safety system has the resources, authority, and structural organization to safeguard the health of American consumers, who spend more than $1 trillion on food each year. Also at issue is whether federal food safety laws, first enacted in the early 1900s, have kept pace with the significant changes that have occurred in the food production, processing, and marketing sectors since then.

This report presents U.S. military casualties as well as governmental and nongovernmental estimates of Iraqi civilian, police, and security forces casualties.

This report, which will be updated as warranted, describes statutory requirements for allocating congressional nominations to service academies. It also identifies the qualifications that must be met by potential nominees, as established by statute and each academy. Finally, sample documents that could be used by congressional offices at various stages of the nomination selection process are included.

There appears to be a growing international consensus to adopt progressively strict economic sanctions against Iran to try to compel it to compromise on its further nuclear development. The U.S. view - increasingly shared by major allies-is that sanctions should target Iran's energy sector, which provides about 80% of government revenues, and try to isolate Iran from the international financial system. U.S. efforts to curb international energy investment in Iran's energy sector began in 1996 with the Iran Sanctions Act (ISA). ISA has been expanded significantly in 2010. This report discusses said expansions, provides background on the ISA, and explores how this Act has affected

Military uniforms are procured through the Defense Logistics Agency (DLA), an agency of the Department of Defense (DOD). DLA is DOD's largest combat support agency, providing worldwide logistics support for the United States (U.S.) military services, civilian agencies, and foreign countries. With headquarters in Fort Belvoir, Virginia, DLA operates three supply centers, one of which is the Defense Supply Center Philadelphia (DSCP), in Philadelphia, PA. DSCP is responsible for procuring nearly all of the food, clothing, and medical supplies used by the military; about 90% of the construction material used by troops in the field, as well as repair parts for aircraft, combat vehicles, and other weapons system platforms. According to DLA Troop Support's website, sales of goods exceeded $14.5 billion during 2009.