Testimony issued by the Government Accountability Office with an abstract that begins "To reduce spending on durable medical equipment (DME) and related items, under federal law the Centers for Medicare & Medicaid Services (CMS) is phasing in, with several rounds of bidding, a competitive bidding program (CBP) for certain DME and other items. Because of numerous concerns, the Medicare Improvements for Patient and Providers Act of 2008 (MIPPA) terminated the CBP round 1 supplier contracts and required CMS to repeat the CBP round 1, the rebid that began in 2009. In November 2009, GAO issued the report Medicare: CMS Working to Address Problems from Round 1 of the Durable Medical Equipment Competitive Bidding Program (GAO-10-27) that documented problems in CMS's implementation of CBP round 1. This statement discusses some of the problems GAO identified and how CMS has or plans to address them in the ongoing CBP rebid bidding process, particularly (1) the bid submission information provided to suppliers, (2) the electronic bid submission system, and (3) the bid disqualification notification process. For the 2009 report, GAO reviewed data provided by CMS and relevant laws and regulations, and interviewed CMS officials. For this statement, GAO also obtained select information on …

Testimony issued by the Government Accountability Office with an abstract that begins "This testimony discusses the Department of Defense's (DOD) separation requirements for enlisted servicemembers diagnosed with personality disorders and the military services' compliance with these requirements. DOD requires that all enlisted servicemembers, including those serving in support of Operation Enduring Freedom (OEF) and Operation Iraqi Freedom (OIF), be physically and psychologically suitable for military service. Enlisted servicemembers who fail to meet this standard may be involuntarily separated from the military. One psychological condition that can render an enlisted servicemember unsuitable for military service is a personality disorder, which is defined as a long-standing, inflexible pattern of behavior that deviates markedly from expected behavior, has an onset in adolescence or early adulthood, and leads to distress or impairment. Although a personality disorder by itself does not make enlisted servicemembers unsuitable for military service, DOD policy allows for involuntary separation from the military if a servicemember's disorder is severe enough that it interferes with his or her ability to function in the military. DOD data show that from November 1, 2001, through June 30, 2007, about 26,000 enlisted servicemembers were separated from the military because of a personality disorder. Of these …

A letter report issued by the Government Accountability Office with an abstract that begins "The Global Positioning System (GPS) provides positioning, navigation, and timing (PNT) data to users worldwide. The U.S. Air Force, which is responsible for GPS acquisition, is in the process of modernizing the system. Last year GAO reported that it was uncertain whether the Air Force could acquire new satellites in time to maintain GPS service without interruption. GAO was asked to assess (1) the status of Air Force efforts to develop and deliver new GPS satellites, the availability of the GPS constellation, and the potential impacts on users if the constellation availability diminishes below its committed level of performance; (2) efforts to acquire the GPS ground control and user equipment necessary to leverage GPS satellite capabilities; (3) the GPS interagency requirements process; and (4) coordination of GPS efforts with the international PNT community. To do this, GAO analyzed program documentation and Air Force data on the GPS constellation, and interviewed officials from DOD and other agencies."

Correspondence issued by the Government Accountability Office with an abstract that begins "The Joint Strike Fighter (JSF) program began in 1996 with an acquisition strategy that called for a competitive engine acquisition program. The program planned to first develop and procure the F135 primary engine and, with a few years lag time, develop the F136 second (or alternate) engine to compete with the F135 engine for future procurements and life-cycle support activities. The Department of Defense (DOD) requested funding for both engines annually as the JSF program progressed until the fiscal year 2007 budget submission, at which point the DOD stopped requesting funding for the F136 alternate engine. Defense officials believe that the operational risks of relying on a single engine supplier are low and do not justify the extra costs to maintain a second engine source. DOD further states that there is no guarantee that having an engine competition will create enough long-term savings to outweigh the up-front costs and now intends to acquire only the F135 primary engine. However, Congress has continued to fund the alternate engine development program annually through fiscal year 2010. According to the Secretary of Defense, DOD would need an additional $2.9 billion in …

Correspondence issued by the Government Accountability Office with an abstract that begins "Since October 1994, the Export-Import Bank of the United States (Ex-Im) has had statutory authority to provide loans, guarantees, and insurance to help finance U.S. exports of defense articles and services, provided that it determines these items are nonlethal and meant primarily for civilian use (dual-use). These exports, referred to as "dual-use" exports, include such items as vehicles that are used by the military primarily for civilian or humanitarian purposes. Legislation providing this authority requires us to report annually on the end uses of the dual-use exports financed by Ex-Im during the second preceding fiscal year. This report covers Ex-Im financing for dual-use exports in fiscal years 2007 through 2009."

A letter report issued by the Government Accountability Office with an abstract that begins "The retreat of Arctic sea ice combined with expected increasing human activity in the area--in shipping traffic and oil and gas exploration--has increased the strategic interest that the United States and other nations have in the Arctic. As a result, the Coast Guard is expected to acquire increased responsibilities in the region. GAO was asked to examine the extent to which the Coast Guard is: (1) coordinating with stakeholders on Arctic issues and operations and what, if any, further opportunities exist to enhance coordination; (2) taking action to identify requirements for future Arctic operations; and (3) taking steps to identify and mitigate challenges to meet current and future Arctic requirements. GAO reviewed Coast Guard documents that described efforts to plan for increased Arctic activity. GAO conducted a site visit to Alaska and interviewed federal officials, Alaska state officials, Alaska Native stakeholders, as well as private or nonprofit organizations representing Arctic interests. These observations are not generalizable, but provided insights on Coast Guard activities and actions."

A letter report issued by the Government Accountability Office with an abstract that begins "Historically, civilian and national security-related information technology (IT) systems have been governed by different information security policies and guidance. Specifically, the Office of Management and Budget and the Department of Commerce's National Institute of Standards and Technology (NIST) established policies and guidance for civilian non-national security systems, while other organizations, including the Committee on National Security Systems (CNSS), the Department of Defense (DOD), and the U.S. intelligence community, have developed policies and guidance for national security systems. GAO was asked to assess the progress of federal efforts to harmonize policies and guidance for these two types of systems. To do this, GAO reviewed program plans and schedules, analyzed policies and guidance, assessed program efforts against key practices for cross-agency collaboration, and interviewed officials responsible for this effort."

A letter report issued by the Government Accountability Office with an abstract that begins "The Housing and Community Development Act of 1974 (act) creating the Community Development Block Grant (CDBG) program provides entitlement communities (metropolitan cities and urban counties) and states with significant discretion in how they distribute funds for eligible activities. Because of this discretion, entitlement communities may use a variety of processes to select individual projects and states may also use different methods to distribute funds to non-entitlement communities. GAO was asked to report on (1) the various methods by which entitlement communities use and distribute their CDBG funds to individual projects within their jurisdictions; (2) the various methods by which states distribute CDBG funds to non-entitlement communities; and (3) HUD's role in overseeing these methods. GAO interviewed CDBG administrators for 20 entitlement communities (the 10 largest by funding and 10 randomly selected) and 5 states (reflecting variety of methods used and geography) and reviewed documents related to their CDBG funding decisions, including the annual action plans for all 50 states. GAO also spoke with CDBG stakeholders, reviewed relevant statutes and regulations, interviewed HUD field office staff and reviewed monitoring documentation."

Testimony issued by the Government Accountability Office with an abstract that begins "The Department of Homeland Security's (DHS) Domestic Nuclear Detection Office (DNDO) is charged with developing and acquiring equipment to detect nuclear and radiological materials to support federal efforts to combat nuclear smuggling. Also within DHS, Customs and Border Protection (CBP) has the lead for operating systems to detect nuclear and radiological materials entering the country at U.S. ports of entry. In 2005, DNDO began working on the cargo advanced automated radiography system (CAARS) intending that it be used by CBP to detect certain nuclear materials in vehicles and containers at U.S. ports of entry. However, in 2007 DNDO decided to cancel the acquisition phase of the program and convert it to a research and development program. GAO was asked to examine events that led to DNDO's decision to cancel the acquisition phase of the program and provide lessons learned from DNDO's experience. This statement is based on prior GAO reports from March 2006 through July 2010 and ongoing work reviewing DHS efforts to develop radiography technology. For ongoing work, GAO reviewed CAARS planning documents and interviewed DHS, DNDO, and CBP officials. GAO provided a draft of the information …

Mandatory spending includes federal government spending on entitlement programs as well as other budget outlays controlled by laws other than appropriation acts. Entitlement programs such as Social Security and Medicare make up the bulk of mandatory spending. This report looks at mandatory spending and how it has grown over time relative to total federal spending and the size of the U.S. economy. It also analyzes future mandatory spending levels and how they are projected to impact the federal budget.

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This report discusses the Conservative Reserve Program (CRP), enacted in 1985, that provides payments to farmers to take highly erodible or environmentally sensitive cropland out of production for 10 years or more. It also discusses several other subprograms of CRP.

The Berkshire Environmental Resource Center at the Massachusetts College of Liberal Arts was established in 2005 to advance student and faculty research, promote environmental awareness and preservation throughout the community, and serve as a resource center for students, faculty, and community members. The project proposed is to enhance programming and outreach.

We have performed extensive experimental and theoretical studies of interfacial friction, relaxation dynamics, and thermodynamics of polymer chains tethered to points, planes, and particles. A key result from our tribology studies using lateral force microscopy (LFM) measurements of polydisperse brushes of linear and branched chains densely grafted to planar substrates is that there are exceedingly low friction coefficients for these systems. Specific project achievements include: (1) Synthesis of three-tiered lubricant films containing controlled amounts of free and pendent PDMS chains, and investigated the effect of their molecular weight and volume fraction on interfacial friction. (2.) Detailed studies of a family of hairy particles termed nanoscale organic hybrid materials (NOHMs) and demonstration of their use as lubricants.

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This research adds to the understanding of the areas of residual starch and biomass conversion to alcohol, by providing data from pilot plant equipment of larger scale than the minimum required to give commercially scalable data. Instrumentation and control is in place to capture the information produced, for economic and technical evaluation. The impact of rheology, recycle streams, and residence time distributions on the technical and economic performance can be assessed. Various processes can be compared technically and economically because the pilot plants are readily modifiable. Several technologies for residual starch yield improvement have been identified, implemented, and patent applications filed. Various biomass-to-ethanol processes have been compared and one selected for technical optimization and commercialization. The technical and economic feasibility of the current simplified biomass conversion process is being confirmed by intensive pilot plant efforts as of this writing. Optimization of the feedstock handling and pretreatment is occurring to increase the alcohol yield above the minimum commercially viable level already demonstrated. Samples of biomass residue and reactor blowdown condensate are being collected to determine the technical and economic performance of the high-water-recycle waste treatment system being considered for the process. The project is of benefit to the public because it …

At the Advanced Light Source (ALS), we are developing broadly applicable, high-accuracy, in-situ, at-wavelength wavefront slope measurement techniques for Kirkpatrick-Baez (KB) mirror nano-focusing. In this paper, we report an initial cross-check of ex-situ and in-situ metrology of a bendable temperature stabilized KB mirror. This cross-check provides a validation of the in-situ shearing interferometry currently under development at the ALS.

The West Coast Regional Carbon Sequestration Partnership (WESTCARB), in collaboration with Shell Oil Co. performed site characterization for a potential small-scale pilot test of geologic sequestration of carbon dioxide (CO2). The site area, know as Montezuma Hills, is near the town of Rio Vista in northern California. During the process of injection at a CO2 storage site, there is a potential for seismic events due to slippage upon pre-existing discontinuities or due to creation of new fractures. Observations from many injection projects have shown that the energy from these events can be used for monitoring of processes in the reservoir. Typically, the events are of relatively high frequency and very low amplitude. However, there are also well documented (non-CO2-related) cases in which subsurface injection operations have resulted in ground motion felt by near-by communities. Because of the active tectonics in California (in particular the San Andreas Fault system), and the potential for public concern, WESTCARB developed and followed an induced seismicity protocol (Myer and Daley, 2010). This protocol called for assessing the natural seismicity in the area and deploying a monitoring array if necessary. In this report, we present the results of the natural seismicity assessment and the results of …

Modeling of laser-plasma wakefield accelerators in an optimal frame of reference [1] is shown to produce orders of magnitude speed-up of calculations from first principles. Obtaining these speedups requires mitigation of a high frequency instability that otherwise limits effectiveness in addition to solutions for handling data input and output in a relativistically boosted frame of reference. The observed high-frequency instability is mitigated using methods including an electromagnetic solver with tunable coefficients, its extension to accomodate Perfectly Matched Layers and Friedman's damping algorithms, as well as an efficient large bandwidth digital filter. It is shown that choosing theframe of the wake as the frame of reference allows for higher levels of filtering and damping than is possible in other frames for the same accuracy. Detailed testing also revealed serendipitously the existence of a singular time step at which the instability level is minimized, independently of numerical dispersion, thus indicating that the observed instability may not be due primarily to Numerical Cerenkov as has been conjectured. The techniques developed for Cerenkov mitigation prove nonetheless to be very efficient at controlling the instability. Using these techniques, agreement at the percentage level is demonstrated between simulations using different frames of reference, with speedups reaching …

Buildings are at the locus of three trends driving China's increased energy use and emissions: urbanization, growing personal consumption, and surging heavy industrial production. Migration to cities and urban growth create demand for new building construction. Higher levels of per-capita income and consumption drive building operational energy use with demand for higher intensity lighting, thermal comfort, and plug-load power. Demand for new buildings, infrastructure, and electricity requires heavy industrial production. In order to quantify the implications of China's ongoing urbanization, rising personal consumption, and booming heavy industrial sector, this study presents a lifecycle assessment (LCA) of the energy use and carbon emissions related to residential and commercial buildings. The purpose of the LCA model is to quantify the impact of a given building and identify policy linkages to mitigate energy demand and emissions growth related to China's new building construction. As efficiency has become a higher priority with growing energy demand, policy and academic attention to buildings has focused primarily on operational energy use. Existing studies estimate that building operational energy consumption accounts for approximately 25% of total primary energy use in China. However, buildings also require energy for mining, extracting, processing, manufacturing, and transporting materials, as well as energy …

The 3M Company has developed a high-temperature low-sag conductor referred to as Aluminum- Conductor Composite-Reinforced or ACCR. The conductor uses an aluminum metal matrix material to replace the steel in conventional conductors so the core has a lower density and higher conductivity. The objective of this work is to accelerate the commercial acceptance by electric utilities of these new conductor designs by testing four representative conductor classes in controlled conditions. Overhead transmission lines use bare aluminum conductor strands wrapped around a steel core strands to transmit electricity. The typical cable is referred to as aluminum-conductor steel-reinforced (ACSR). The outer strands are aluminum, chosen for its conductivity, low weight, and low cost. The center strand is of steel for the strength required to support the weight without stretching the aluminum due to its ductility. The power density of a transmission corridor has been directly increased by increasing the voltage level. Transmission voltages have increased from 115-kV to 765- kV over the past 80 years. In the United States, further increasing the voltage level is not feasible at this point in time, so in order to further increase the power density of a transmission corridor, conductor designs that increase the current carrying …

This report is prepared in the context of a larger program whose mission is to advance understanding of ventilation and indoor air quality in U.S. homes. A specific objective of this program is to develop the scientific basis ? through controlled experiments, monitoring and analysis ? for health risk-based ventilation standards. Appropriate and adequate ventilation is a basic element of a healthy home. Ventilation provides outdoor air and in the process removes indoor odors and contaminants including potentially unhealthful chemicals emitted by indoor materials, products and activities. Ventilation traditionally was assured to occur via infiltration of outdoor air through cracks and other leakage pathways in the residential building envelope. As building air tightness is improved for energy efficiency, infiltration can be reduced to inadequate levels. This has lead to the development of standards requiring mechanical ventilation. Though nominally intended to ensure acceptable indoor air quality, the standards are not explicitly tied to health risk or pollutant exposure targets. LBNL is currently designing analyses to assess the impact of varying ventilation standards on pollutant concentrations, health risks and energy use. These analyses require information on sources of chemical pollutant emissions, ideally including emission rates and the impact of ventilation on emissions. …

Methane hydrate was formed in two moist sands and a sand/silt mixture under a confining stress in an X-ray-transparent pressure vessel. Three initial water saturations were used to form three different methane-hydrate saturations in each medium. X-ray computed tomography (CT) was used to observe location-specific density changes caused by hydrate formation and flowing water. Gas-permeability measurements in each test for the dry, moist, frozen, and hydrate-bearing states are presented. As expected, the effective permeabilities (intrinsic permeability of the medium multiplied by the relative permeability) of the moist sands decreased with increasing moisture content. In a series of tests on a single sample, the effective permeability typically decreased as the pore space became more filled, in the order of dry, moist, frozen, and hydrate-bearing. In each test, water was flowed through the hydrate-bearing medium and we observed the location-specific changes in water saturation using CT scanning. We compared our data to a number of models, and our relative permeability data compare most favorably with models in which hydrate occupies the pore bodies rather than the pore throats. Inverse modeling (using the data collected from the tests) will be performed to extend the relative permeability measurements.