A letter report issued by the Government Accountability Office with an abstract that begins "The Centers for Medicare & Medicaid Services (CMS)--an agency within the Department of Health and Human Services (HHS)--and the Congress, through the Deficit Reduction Act of 2005 (DRA), recently acted to constrain spending on imaging services, one of the fastest growing set of services under Medicare Part B, which covers physician and other outpatient services. GAO was asked to provide information to help the Congress evaluate imaging services in Medicare. In this report, GAO provides information on (1) trends in Medicare spending on imaging services from 2000 through 2006, (2) the relationship between spending growth and the provision of imaging services in physicians' offices, and (3) imaging management practices used by private payers that may have lessons for Medicare. To do this work, GAO analyzed Medicare claims data from 2000 through 2006, interviewed private health care plans, and reviewed health services literature."

A letter report issued by the Government Accountability Office with an abstract that begins "The Department of Defense (DOD) relies heavily on petroleum-based fuel for mobility energy--the energy required for moving and sustaining its forces and weapons platforms for military operations. Dependence on foreign oil, projected increases in worldwide demand, and rising oil costs, as well as the significant logistics burden associated with moving fuel on the battlefield, will likely require DOD to address its mobility energy demand. GAO was asked to (1) identify key efforts under way to reduce mobility energy demand and (2) assess the extent to which DOD has established an overarching organizational framework to guide and oversee these efforts. GAO reviewed DOD documents, policies, and studies, and interviewed agency officials."

A letter report issued by the Government Accountability Office with an abstract that begins "Federal agencies are increasingly using electronic mail (e-mail) for essential communication. In doing so, they are potentially creating messages that have the status of federal records, which must be managed and preserved in accordance with the Federal Records Act. Under the act, both the National Archives and Records Administration (NARA) and federal agencies have responsibilities for managing federal records, including e-mail records. In view of the importance that e-mail plays in documenting government activities, GAO was asked, among other things, to review the extent to which NARA provides oversight of federal records management, describe selected agencies' processes for managing e-mail records, and assess these agencies' e-mail policies and key practices. To do so, GAO examined NARA guidance, regulations, and oversight activities, as well as e-mail policies at four agencies (of contrasting sizes and structures) and the practices of selected officials."

A letter report issued by the Government Accountability Office with an abstract that begins "Under the Medicare program, the Centers for Medicare & Medicaid Services (CMS) and its contractors paid over $400 billion in Medicare benefits in calendar year 2006. GAO was asked to determine if Medicare providers have unpaid federal taxes and, if so, to (1) determine the magnitude of such debts, (2) identify examples of Medicare providers that have engaged in abusive or potentially criminal activities, and (3) determine whether CMS prevents delinquent taxpayers from enrolling in Medicare or levies payments to pay taxes. To determine amount of unpaid taxes owed by Medicare providers, GAO compared claim payment data from CMS and tax debt data from the Internal Revenue Service (IRS). In addition, GAO reviewed policies, procedures, and regulations related to Medicare. GAO also performed additional investigative activities."

A letter report issued by the Government Accountability Office with an abstract that begins "The Federal and District of Columbia Government Real Property Act of 2006 (Public Law 109-396) mandated GAO's review of the property exchange between the District and the federal government. None of the conveyances had occurred by the beginning of GAO's audit phase. After consulting with the congressional committees specified in the law, GAO developed research questions that reflect an assessment of property exchanges and development progress to date. GAO's objectives were to determine (1) the status of the conveyances and transfers of the properties identified in the law; (2) what steps the District and the federal government have taken toward completing the conveyances, what factors have affected their completion, and what additional steps remain; (3)what preliminary development has occurred on the properties exchanged between the District and the federal government, and what are the current plans for use of these properties; and (4)what development challenges the District and federal government face going forward. GAO analyzed planning and property documents; conducted site visits; and interviewed senior officials from the District and the Department of the Interior (DOI) among others. DOI and the General Services Administration agreed with …

A letter report issued by the Government Accountability Office with an abstract that begins "The Department of Agriculture's Forest Service and the Department of the Interior's Bureau of Land Management (BLM) have stewardship contracting authority, which allows the agencies to trade goods--such as timber--for services (e.g., thinning forests or rangelands) that the agencies would otherwise pay for with appropriated dollars, and to enter into stewardship contracts lasting up to 10 years. The authority is set to expire in 2013. GAO was asked to determine, among other things, (1) the extent to which the agencies are using stewardship contracting and (2) what successes and challenges the agencies have experienced in using it. In doing so, GAO assessed agency data, reviewed project files, and visited projects in numerous locations."

A letter report issued by the Government Accountability Office with an abstract that begins "The Department of Defense (DOD) industry personnel security clearance program has long-standing delays and backlogs in completing clearance requests and difficulties in accurately projecting its future needs for investigations to be conducted by the Office of Personnel Management (OPM). In 2006, Congress mandated that DOD report annually on the future requirements of the program and DOD's efforts to improve it, and that GAO evaluate DOD's first report. Specifically, GAO was required to report on (1) the extent to which the report responds to the issues in the mandate, (2) the number and cost of clearance investigations and adjudications in fiscal years 2000-2006, and (3) the extent to which DOD has developed procedures to estimate future needs, plans to reduce delays and backlogs, and plans to provide funding for the program. To accomplish these objectives, GAO obtained and reviewed laws, executive orders, policies, reports, and other documents related to the security clearance process and interviewed officials from a range of government offices concerned with the clearance process."

A letter report issued by the Government Accountability Office with an abstract that begins "The Internal Revenue Service (IRS) has ambitious goals to improve enforcement, improve taxpayer service, increase research, and continue investing in systems modernization. The President's 2009 proposed budget is a roadmap for how IRS intends to achieve these goals. IRS's 2008 filing season performance, along with the performance of paid preparers who help taxpayers, is a key indicator of the tax system's impact on taxpayers. GAO was asked to (1) assess how the budget request allocates resources compared to prior years, (2) determine the status of systems modernization efforts, (3) assess filing season performance, and (4) assess IRS's ability to identify paid preparers. GAO compared the budget request to prior years, updated our previous reporting, compared IRS's filing season performance to prior years and goals, and interviewed IRS officials."

A letter report issued by the Government Accountability Office with an abstract that begins "Federal funding to states supported more than 200,000 youth in residential facilities in 2004, many seeking help to address behavioral or emotional challenges. However, federal investigations have identified maltreatment and civil rights abuses in some facilities. GAO was asked to provide national information about (1) the nature of incidents that adversely affect youth well-being in residential facilities, (2) how state licensing and monitoring requirements address youth well-being in these facilities, and (3) what factors affect federal agencies' ability to hold states accountable for youth well-being in residential facilities. GAO conducted national Web-based surveys of state child welfare, health and mental health, and juvenile justice agencies and achieved an 85 percent response rate for each of the three surveys. We also visited four states, interviewed program officials, and reviewed laws and documentation."

A letter report issued by the Government Accountability Office with an abstract that begins "Potential terrorist attacks and the possibility of naturally occurring disease outbreaks have raised concerns about the "surge capacity" of the nation's health care systems to respond to mass casualty events. GAO identified four key components of preparing for medical surge: (1) increasing hospital capacity, (2) identifying alternate care sites, (3) registering medical volunteers, and (4) planning for altering established standards of care. The Department of Health and Human Services (HHS) is the primary agency for hospital preparedness, including medical surge. GAO was asked to examine (1) what assistance the federal government has provided to help states prepare for medical surge, (2) what states have done to prepare for medical surge, and (3) concerns states have identified related to medical surge. GAO reviewed documents from the 50 states and federal agencies. GAO also interviewed officials from a judgmental sample of 20 states and from federal agencies, as well as emergency preparedness experts."

A letter report issued by the Government Accountability Office with an abstract that begins "The Internal Revenue Service (IRS) estimated that $33 billion in income tax assessments was not paid in 2001. If not collected, annual unpaid taxes keep accumulating each year along with penalty and interest charges to create an inventory of "tax debts," which approached $300 billion at the end of fiscal year 2007. IRS has shelved or delayed collection of billions of dollars of this tax debt. Congress and others have questioned IRS's collection process's effectiveness. As requested, GAO is reporting on (1) the process IRS uses to collect unpaid tax debts; (2) trends in the unpaid tax debt inventory, collections, and other resolutions from fiscal years 2002 through 2007; and (3) the performance measures and goals available to assess how well the collection process works overall. To meet these objectives, GAO interviewed IRS officials and reviewed IRS's unpaid assessments database, documentation on the collection process and factors used in managing it, and IRS's highest-level collection measures."

A letter report issued by the Government Accountability Office with an abstract that begins "In 2006, a Los Alamos National Laboratory (LANL) contract employee unlawfully removed classified information from the laboratory. This was the latest in a series of high-profile security incidents at LANL spanning almost a decade. LANL conducts research on nuclear weapons and other national security areas for the National Nuclear Security Administration (NNSA). GAO was asked to (1) identify LANL's major programs and activities and how much they rely on classified resources; (2) identify initiatives LANL is taking to reduce and consolidate its classified resources and physical footprint and the extent to which these initiatives address earlier security concerns; and (3) determine whether its new management approaches will sustain security improvements over the long-term. To carry out its work, GAO analyzed LANL data; reviewed policies, plans, and budgets; and interviewed officials."

A letter report issued by the Government Accountability Office with an abstract that begins "In the Telecommunications Act of 1996 (1996 Act), the Congress said that consumers in "rural, insular, and high-cost areas" should have access to services and rates that are "reasonably comparable" to those in urban areas. To implement the 1996 Act, the Federal Communications Commission (FCC) modified and expanded the high-cost program. The program provides funding to some telecommunications carriers, facilitating lower telephone rates in rural areas. GAO was asked to review (1) the effect that the program structure has on the level of support and types of services in rural areas, (2) the extent to which FCC has developed performance goals and measures for the program, and (3) the extent to which FCC has implemented internal control mechanisms. GAO reviewed relevant documents; interviewed federal and state officials, industry participants, and experts; conducted 11 state site visits; and conducted a survey of state regulators, available online at GAO-08-662SP."

The 2002 farm bill required retailers to provide country-of-origin labeling (COOL) for fresh produce, red meats, peanuts, and seafood by September 30, 2004. Congress twice postponed implementation for all bu seafood; COOL now must be implemented by September 30, 2008. This report describes the current status of the COOL issue, as well as the ongoing discussion of additional COOL requirements for other foods and food ingredients as part of the proposed Federal Food, Drug, and Cosmetic Act overhaul.

The primary objective of this study was to analyze the spatial variability of temperature and relative humidity across Kansas (KS) and Oklahoma (OK) for sparse and dense networks by comparing data from (1) the Surface Meteorological Observing System (SMOS) installations at the Atmospheric Radiation Measurement (ARM; Peppler et al. 2007) Program's Southern Great Plains site and (2) the Oklahoma Mesonet (OKM; McPherson et al. 2007). Given the wealth of observations available from these networks, this study provided the unique opportunity to determine, within a quantifiable statistical limit, an optimal distance between stations deployed for observation of the climatological values of temperature and relative humidity. Average distances between a given station and its closest neighboring station for the ARM SMOS ({approx} 70 km) and the OKM ({approx} 30 km; Brotzge and Richardson 2003) networks provided an excellent framework for comparisons of sparse and dense observations (Figure 1). This study further lays groundwork for a future investigation to determine the necessary spacing between observations for initialization of gridded numerical models. The spatial variability of temperature and relative humidity was examined over KS and OK by comparing observations between station pairs located in three primary domains: (1) a sparse domain in KS, consisting …

The U.S. Department of Energy’s (DOE) commitment to assuring the health and safety of its workers includes the conduct of illness and injury surveillance activities that provide an early warning system to detect health problems among workers. The Illness and Injury Surveillance Program monitors illnesses and health conditions that result in an absence, occupational injuries and illnesses, and disabilities and deaths among current workers.

The process of recovering the waste in storage tanks at the Savannah River Site (SRS) typically requires mixing the contents of the tank with one to four dual-nozzle jet mixers located within the tank. The typical criteria to establish a mixed condition in a tank are based on the number of pumps in operation and the time duration of operation. To ensure that a mixed condition is achieved, operating times are set conservatively long. This approach results in high operational costs because of the long mixing times and high maintenance and repair costs for the same reason. A significant reduction in both of these costs might be realized by reducing the required mixing time based on calculating a reliable indicator of mixing with a suitably validated computer code. The work described in this report establishes the basis for further development of the theory leading to the identified mixing indicators, the benchmark analyses demonstrating their consistency with widely accepted correlations, and the application of those indicators to SRS waste tanks to provide a better, physically based estimate of the required mixing time. Waste storage tanks at SRS contain settled sludge which varies in height from zero to 10 ft. The sludge …

The performance of a glass used for immobilization of high-level nuclear waste (HLW) is generally quantified by its resistance to chemical degradation, or durability. The durability of a HLW glass is dependent on its composition. If crystalline phases form within a glass during cooling, the composition of the residual glass network is altered, therefore affecting the durability of the glass. Crystallization of nepheline (NaAlSiO{sub 4}) has been shown to adversely impact the durability of HLW glasses since it removes glass forming species (in this case, Al and Si) from the glass network. The propensity for nepheline crystallization in a HLW glass increases with increasing concentrations of Al{sub 2}O{sub 3} and Na{sub 2}O in the glass. Nepheline crystallization is therefore of concern for processing of HLW at the Defense Waste Processing Facility (DWPF) since the sludge waste streams at the Savannah River Site (SRS) can contain high concentrations of Al{sub 2}O{sub 3} and Na{sub 2}O. Currently, a 'nepheline discriminator' is included as a process control constraint at the DWPF. The nepheline discriminator relates the concentrations of SiO{sub 2}, Na{sub 2}O and Al{sub 2}O{sub 3} (as weight percentages in glass) to a critical value of 0.62. The discriminator defines a boundary line …

Berkeley Lab operates facilities where radionuclides are handled and stored. These facilities are subject to the U.S. Environmental Protection Agency (EPA) radioactive air emission regulations in Code of Federal Regulations (CFR) Title 40, Part 61, Subpart H (EPA 1989). The EPA regulates radionuclide emissions that may be released from stacks or vents on buildings where radionuclide production or use is authorized or that may be emitted as diffuse sources. In 2007, all Berkeley Lab sources were minor stack or building emissions sources of radionuclides (sources resulting in a potential dose of less than 0.1 mrem/yr [0.001 mSv/yr]), there were no diffuse emissions, and there were no unplanned emissions. Emissions from minor sources either were measured by sampling or monitoring or were calculated based on quantities received for use or produced during the year. Using measured and calculated emissions, and building-specific and common parameters, Laboratory personnel applied the EPA-approved computer code, CAP88-PC, Version 3.0, to calculate the effective dose equivalent to the maximally exposed individual (MEI). The effective dose equivalent from all sources at Berkeley Lab in 2007 is 1.2 x 10{sup -2} mrem/yr (1.2 x 10{sup -4} mSv/yr) to the MEI, well below the 10 mrem/yr (0.1 mSv/yr) EPA dose …

The U.S. Department of Energy’s (DOE) commitment to assuring the health and safety of its workers includes the conduct of illness and injury surveillance activities that provide an early warning system to detect health problems among workers. The Illness and Injury Surveillance Program monitors illnesses and health conditions that result in an absence, occupational injuries and illnesses, and disabilities and deaths among current workers.

As part of the Global Nuclear Energy Partnership (GNEP), a fast reactor simulation program was launched in April 2007 to develop a suite of modern simulation tools specifically for the analysis and design of sodium cooled fast reactors. The general goal of the new suite of codes is to reduce the uncertainties and biases in the various areas of reactor design activities by enhanced prediction capabilities. Under this fast reactor simulation program, a high-fidelity deterministic neutron transport code named UNIC is being developed. The final objective is to produce an integrated, advanced neutronics code that allows the high fidelity description of a nuclear reactor and simplifies the multi-step design process by direct coupling with thermal-hydraulics and structural mechanics calculations. Currently there are three solvers for the neutron transport code incorporated in UNIC: PN2ND, SN2ND, and MOCFE. PN2ND is based on a second-order even-parity spherical harmonics discretization of the transport equation and its primary target area of use is the existing homogenization approaches that are prevalent in reactor physics. MOCFE is based upon the method of characteristics applied to an unstructured finite element mesh and its primary target area of use is the fine grained nature of the explicit geometrical problems …

All of the work conducted under the auspices of DE-FC02-01ER25473 was characterized by exceptionally close collaboration with researchers at the Lawrence Berkeley National Laboratory (LBNL). This included having one of my graduate students - Sarah Williams - spend the summer working with Dr. Ann Almgren a staff scientist in the Center for Computational Sciences and Engineering (CCSE) which is a part of the National Energy Research Supercomputer Center (NERSC) at LBNL. As a result of this visit Sarah decided to work on a problem suggested by Dr. John Bell the head of CCSE for her PhD thesis, which she finished in June 2007. Writing a PhD thesis while working at one of the University of California (UC) managed DOE laboratories is a long established tradition at the University of California and I have always encouraged my students to consider doing this. For example, in 2000 one of my graduate students - Matthew Williams - finished his PhD thesis while working with Dr. Douglas Kothe at the Los Alamos National Laboratory (LANL). Matt is now a staff scientist in the Diagnostic Applications Group in the Applied Physics Division at LANL. Another one of my graduate students - Christopher Algieri - who …

The goal of this work is to fabricate model nanomaterials with different types of disorder and use atomic-scale characterization and macroscopic magnetization measurements to understand better how specific types of disorder affects macroscopic magnetic behavior. This information can be used to produce magnetic nanomaterials with specific properties for applications such as permanent magnets, soft magnetic material for motors and biomedical applications.

The objectives of this proposed research were: 91) Separation and storage of hydrogen on nanophase diamonds. It is expected that the produced hydrogen, which will be in a mixture, can be directed to a nanophase diamond system directly, which will not only store the hydrogen, but also separate it from the gas mixture, and (2) release of the stored hydrogen from the nanophase diamond.