Correspondence issued by the Government Accountability Office with an abstract that begins "About 75 percent of casualties in current combat operations in Iraq and Afghanistan are attributed to improvised explosive devices (IED). To mitigate the threat from these weapons, the Department of Defense (DOD) initiated the Mine Resistant Ambush Protected (MRAP) vehicle program, which uses a tailored acquisition approach to rapidly acquire and field the vehicles. In May 2007, the Secretary of Defense affirmed MRAP as DOD's single most important acquisition program. To date, more than $22 billion has been appropriated to acquire more than 15,000 MRAP vehicles, and about 6,600 of the vehicles have been fielded. In view of the importance of this program and the significant cost involved, Congress asked us to (1) describe DOD's approach for and progress in implementing its strategy for rapidly acquiring and fielding MRAP vehicles, and (2) identify the challenges remaining for the program."

Correspondence issued by the Government Accountability Office with an abstract that begins "In February 2006, we reported on significant internal control deficiencies related to contractor payments and property accountability associated with the development of the Federal Bureau of Investigation's (FBI) Trilogy information technology (IT) modernization project. In that audit, we found FBI's invoice review and approval process did not provide an adequate basis to verify that goods and services billed were actually received and that amounts billed were appropriate. We also found that FBI relied extensively on Trilogy contractors to purchase and account for Trilogy equipment without controls or data to verify the accuracy and completeness of the contractor records. Additionally, once FBI took possession of the Trilogy equipment, it did not have adequate controls to safeguard those assets. FBI is now acquiring and deploying a new automated case management system, known as Sentinel, to replace the case management system that was to be delivered as part of the Trilogy project. Sentinel is being developed in four phases at an estimated cost of $425 million and is scheduled to be completed in May 2010. Phase 1 of the project was completed in June 2007. In light of the problems we …

A letter report issued by the Government Accountability Office with an abstract that begins "Each year, criminal organizations transport hundreds of tons of illegal drugs from South America to the United States through a 6 million square mile "transit zone" including Central America, the Caribbean, the Gulf of Mexico, and the eastern Pacific Ocean. Since fiscal year 2003, the United States has provided over $950 million to support counternarcotics efforts in transit zone countries, which historically lacked the capacity to interdict drugs. GAO was asked to examine (1) how the United States has assisted transit zone countries in disrupting drug trafficking and (2) what factors have impeded these efforts. GAO analyzed relevant data, met with U.S. and foreign officials, and visited selected countries."

Testimony issued by the Government Accountability Office with an abstract that begins "The Implementing Recommendations of the 9/11 Commission Act of 2007 requires the Transportation Security Administration (TSA) to implement a system to physically screen 100 percent of cargo on passenger aircraft by August 2010. To fulfill these requirements, the Department of Homeland Security's (DHS) TSA is developing the Certified Cargo Screening Program (CCSP), which would allow the screening of cargo to occur prior to placement on an aircraft. This testimony addresses four challenges TSA may face in developing a system to screen 100 percent of cargo: (1) deploying effective technologies; (2) changing TSA air cargo screening exemptions; (3) allocating compliance inspection resources to oversee CCSP participants; and (4) securing cargo transported from a foreign nation to the United States. GAO's comments are based on GAO products issued from October 2005 through February 2008, including selected updates conducted in July 2008."

A letter report issued by the Government Accountability Office with an abstract that begins "The Social Security Administration (SSA) has been withholding Medicare premiums from beneficiaries' Social Security payments since the Supplementary Medical Insurance (Part B) program was first enacted in 1965. Beginning in 2006, premium withholding became a payment option for the Medicare Advantage program (Part C) and the new program for Prescription Drug Coverage (Part D). These changes were authorized by the Medicare Prescription Drug, Improvement, and Modernization Act of 2003 (MMA). Two federal agencies play critical roles in the premium withholding process: the Centers for Medicare & Medicaid Services (CMS) and SSA. The Department of the Treasury (Treasury) also plays an important role by disbursing the adjusted Social Security payments to beneficiaries. Premium withholding can make paying premiums easier for both beneficiaries and the insurance plans. However, following implementation of the premium withholding provisions under MMA in 2006, there were numerous reports of beneficiaries not having the correct Parts C and D premiums withheld. Also, about 231,000 beneficiaries had their premiums refunded erroneously because they were mistakenly identified as having paid excess premiums. As a result, you requested that we review efforts to ensure that the correct …

Correspondence issued by the Government Accountability Office with an abstract that begins "Members of the Committee requested that GAO provide additional comments to a number of post-hearing questions after GAO testified before the Subcommittee on Management, Investigations, and Oversight on the Department of Homeland Security's (DHS) Preparedness for Catastrophic Disasters. The responses are generally based on work associated with previously issued GAO products, which were conducted in accordance with generally accepted government auditing standards. Because the responses are based on prior work, we did not obtain comments from DHS."

Testimony issued by the Government Accountability Office with an abstract that begins "Over 100 million workers are protected through the Department of Labor's (Labor) enforcement of labor laws. Under the Fair Labor Standards Act, Labor's Wage and Hour Division (WHD) enforces provisions that ensure workers are paid at least the federal minimum wage and for overtime. The Act applies to businesses engaged in interstate commerce or ones with annual sales over $500,000. Conducting investigations based on worker complaints is WHD's priority. According to Labor, investigations range from comprehensive investigations to conciliations, which consist primarily of phone calls to a complainant's employer. This testimony highlights findings from GAO's ongoing investigation of WHD's process for investigating and resolving wage and hour complaints. Specifically this testimony will report on cases GAO has identified from ongoing work that show inadequate WHD investigations of complaints. To develop the case studies, GAO obtained and analyzed data from WHD for over 70,000 closed case files from fiscal years 2005 to 2007. GAO then reviewed WHD documents and obtained information from publicly available sources in order to determine facts about the employers that had complaints filed against them. The results of these cases cannot be projected to all …

Testimony issued by the Government Accountability Office with an abstract that begins "Over 130 million workers are protected from substandard wages and working conditions by the Fair Labor Standards Act (FLSA). This act contains specific provisions to ensure that workers are paid the federal minimum wage and for overtime, and that youth are protected from working too many hours and from hazardous conditions. The Department of Labor's Wage and Hour Division (WHD) is responsible for enforcing employer compliance with FLSA. To secure compliance, WHD uses enforcement actions, partnerships with external groups, and outreach activities. In response to a congressional request, we examined (1) the trends in FLSA compliance activities from fiscal years 1997 to 2007, (2) the effectiveness of WHD's efforts to plan and conduct these activities, and (3) the extent to which these activities have improved FLSA compliance."

Testimony issued by the Government Accountability Office with an abstract that begins "Flight delays and cancellations have plagued the U.S. aviation system. According to the Department of Transportation (DOT), more than one in four flights either arrived late or was canceled in 2007--making it one of the worst years for delays in the last decade. Delays and cancellations were particularly evident at certain airports, especially the three New York metropolitan commercial passenger airports--Newark Liberty International (Newark), John F. Kennedy International (JFK), and LaGuardia. To avoid a repeat of last summer's problems, DOT and the Federal Aviation Administration (FAA) have worked with the aviation industry over the past several months to develop and implement several actions to reduce congestion and delays for the summer 2008 travel season. This testimony addresses (1) the trends in the extent and principal sources of flight delays and cancellations over the last 10 years, (2) the status of federal government actions to reduce flight delays and cancellations, and (3) the extent to which these actions may reduce delays and cancellations for the summer 2008 travel season. This statement is based on an analysis of DOT data on airline on-time performance, a review of relevant documents and …

In order to efficiently perform particle simulations in systems with widely varying magnetization, we developed a drift-Lorentz mover, which interpolates between full particle dynamics and drift kinetics in such a way as to preserve a physically correct gyroradius and particle drifts for both large and small ratios of the timestep to the cyclotron period. In order to extend applicability of the mover to systems with plasma frequency exceeding the cyclotron frequency such as one may have with fully neutralized drift compression of a heavy-ion beam we have developed an implicit version of the mover. A first step in this direction, in which the polarization charge was added to the field solver, was described previously. Here we describe a fully implicit algorithm (which is analogous to the direct-implicit method for conventionalparticle-in-cell simulation), summarize a stability analysis of it, and describe several tests of the resultant code.

We examine the relative merits of gravity measurements as a monitoring tool for geological CO{sub 2} sequestration in three different modeling scenarios. The first is a combined CO{sub 2} enhanced oil recovery (EOR) and sequestration in a producing oil field, the second is sequestration in a brine formation, and the third is for a coalbed methane formation. EOR/sequestration petroleum reservoirs have relatively thin injection intervals with multiple fluid components (oil, hydrocarbon gas, brine, and CO{sub 2}), whereas brine formations usually have much thicker injection intervals and only two components (brine and CO{sub 2}). Coal formations undergoing methane extraction tend to be thin (3-10 m), but shallow compared to either EOR or brine formations. The injection of CO{sub 2} into the oil reservoir produced a bulk density decrease in the reservoir. The spatial pattern of the change in the vertical component of gravity (G{sub z}) is directly correlated with the net change in reservoir density. Furthermore, time-lapse changes in the borehole G{sub z} clearly identified the vertical section of the reservoir where fluid saturations are changing. The CO{sub 2}-brine front, on the order of 1 km within a 20 m thick brine formation at 1900 m depth, with 30% CO{sub 2} …

Electromagnetic induction data parameterized in time dependent object intrinsic polarizabilities allow discrimination of unexploded ordnance (UXO) from false targets (scrap metal). Data from a cart-mounted system designed for discrimination of UXO with 20 mm to 155 mm diameters are used. Discrimination of UXO from irregular scrap metal is based on the principal dipole polarizabilities of a target. A near-intact UXO displays a single major polarizability coincident with the long axis of the object and two equal smaller transverse polarizabilities, whereas metal scraps have distinct polarizability signatures that rarely mimic those of elongated symmetric bodies. Based on a training data set of known targets, object identification was made by estimating the probability that an object is a single UXO. Our test survey took place on a military base where both 4.2-inch mortar shells and scrap metal were present. The results show that we detected and discriminated correctly all 4.2-inch mortars, and in that process we added 7%, and 17%, respectively, of dry holes (digging scrap) to the total number of excavations in two different survey modes. We also demonstrated a mode of operation that might be more cost effective than the current practice.

The United States (U.S.) has identified 61.5 metric tons (MT) of plutonium that is permanently excess to use in nuclear weapons programs, including 47.2 MT of weapons-grade plutonium. Except for materials that remain in use for programs outside of national defense, including programs for nuclear-energy development, the surplus inventories will be stored safely by the Department of Energy (DOE) and then transferred to facilities that will prepare the plutonium for permanent disposition. Some items will be disposed as transuranic waste, low-level waste, or spent fuel. The remaining surplus plutonium will be managed through: (1) the Mixed Oxide (MOX) Fuel Fabrication Facility (FFF), to be constructed at the Savannah River Site (SRS), where the plutonium will be converted to fuel that will be irradiated in civilian power reactors and later disposed to a high-level waste (HLW) repository as spent fuel; (2) the SRS H-Area facilities, by dissolving and transfer to HLW systems, also for disposal to the repository; or (3) alternative immobilization techniques that would provide durable and secure disposal. From the beginning of the U.S. program for surplus plutonium disposition, DOE has sponsored research to characterize the surplus materials and to judge their suitability for planned disposition options. Because many …

A number of (semi-)analytical solutions are available to drawdown analysis and leakage estimation of shallow aquifer-aquitard systems. These solutions assume that the systems are laterally infinite. When a large-scale pumping from (or injection into) an aquifer-aquitard system of lower specific storativity occurs, induced pressure perturbation (or hydraulic head drawdown/rise) may reach the lateral boundary of the aquifer. We developed semi-analytical solutions to address the induced pressure perturbation and vertical leakage in a 'laterally bounded' system consisting of an aquifer and an overlying/underlying aquitard. A one-dimensional radial flow equation for the aquifer was coupled with a one-dimensional vertical flow equation for the aquitard, with a no-flow condition imposed on the outer radial boundary. Analytical solutions were obtained for (1) the Laplace-transform hydraulic head drawdown/rise in the aquifer and in the aquitard, (2) the Laplace-transform rate and volume of leakage through the aquifer-aquitard interface integrated up to an arbitrary radial distance, (3) the transformed total leakage rate and volume for the entire interface, and (4) the transformed horizontal flux at any radius. The total leakage rate and volume depend only on the hydrogeologic properties and thicknesses of the aquifer and aquitard, as well as the duration of pumping or injection. It was …

The objective of this program was to explore a combination of advanced injection control and urea-selective catalytic reduction (SCR) to reduce the emissions of oxides of nitrogen (NOx) and particulate matter (PM) from a Tier 2 off-highway diesel engine to Tier 3 emission targets while maintaining fuel efficiency. The engine used in this investigation was a 2004 4.5L John Deere PowerTechTM; this engine was not equipped with exhaust gas recirculation (EGR). Under the original CRADA, the principal objective was to assess whether Tier 3 PM emission targets could be met solely by increasing the rail pressure. Although high rail pressure will lower the total PM emissions, it has a contrary effect to raise NOx emissions. To address this effect, a urea-SCR system was used to determine whether the enhanced NOx levels, associated with high rail pressure, could be reduced to Tier 3 levels. A key attraction for this approach is that it eliminates the need for a Diesel particulate filter (DPF) to remove PM emissions. The original CRADA effort was also performed using No.2 Diesel fuel having a maximum sulfur level of 500 ppm. After a few years, the CRADA scope was expanded to include exploration of advanced injection strategies …

To ensure inheritance by daughter cells, many low-copy number bacterial plasmids, including the R1 drug-resistance plasmid, encode their own DNA segregation systems. The par operon of plasmid R1 directs construction of a simple spindle structure that converts free energy of polymerization of an actin-like protein, ParM, into work required to move sister plasmids to opposite poles of rod-shaped cells. The structures of individual components have been solved, but little is known about the ultrastructure of the R1 spindle. To determine the number of ParM filaments in a minimal R1 spindle, we used DNA-gold nanocrystal conjugates as mimics of the R1 plasmid. Wefound that each end of a single polar ParM filament binds to a single ParR/parC-gold complex, consistent with the idea that ParM filaments bind in the hollow core of the ParR/parC ring complex. Our results further suggest that multifilament spindles observed in vivo are associated with clusters of plasmidssegregating as a unit.

The Plutonium Finishing Plant at the Department of Energy's Hanford Site in southeastern Washington State began operations in 1949 to process plutonium and plutonium products. Its primary mission was to produce plutonium metal, fabricate weapons parts, and stabilize reactive materials. These operations, and subsequent activities, were performed in production lines, consisting primarily of hundreds of gloveboxes. Over the years, these gloveboxes and attendant processes have been continuously modified. The plant is currently inactive and Fluor Hanford has been tasked with cleaning out contaminated equipment and gloveboxes from the facility so it can be demolished in the near future. Approximately 100 gloveboxes at PFP have been cleaned out in the past four years and about 90 gloveboxes remain to be cleaned out. Because specific commitment dates for this work have been established with the State of Washington and other entities, it is important to adopt work practices that increase the safety and speed of this effort. The most recent work practice to be adopted by Fluor Hanford D and D workers is the use of 3-D models to make the process of cleaning out the radioactive gloveboxes more efficient. The use of 3-D models has significantly improved the work-planning process by …

The UCLA-DOE Institute of Genomics and Proteomics is an organized research unit of the University of California, sponsored by the Department of Energy through the mechanism of a Cooperative Agreement. Today the Institute consists of 10 Principal Investigators and 7 Associate Members, developing and applying technologies to promote the biological and environmental missions of the Department of Energy, and 5 Core Technology Centers to sustain this work. The focus is on understanding genomes, pathways and molecular machines in organisms of interest to DOE, with special emphasis on developing enabling technologies. Since it was founded in 1947, the UCLA-DOE Institute has adapted its mission to the research needs of DOE and its progenitor agencies as these research needs have changed. The Institute started as the AEC Laboratory of Nuclear Medicine, directed by Stafford Warren, who later became the founding Dean of the UCLA School of Medicine. In this sense, the entire UCLA medical center grew out of the precursor of our Institute. In 1963, the mission of the Institute was expanded into environmental studies by Director Ray Lunt. I became the third director in 1993, and in close consultation with David Galas and John Wooley of DOE, shifted the mission of …

The most likely velocity of ions moving away from vacuum arc cathode spots was measured using a set of probes along the path of plasma expansion. The goal was to determine how much, if any, change of the ion drift velocity occurs in the expanded plasma. The arc discharge current was perturbed to create plasma density markers whose travel is picked up by the set of probes. It was found that the perturbation with current oscillations did not result in consistent data because ion current maxima and minima are not only determined by the plasma production but by the transients of the arc pulse and by the asymmetry of the ion velocity distribution function. Perturbation with a short current spike was more conclusive. The ion velocity was measured to be slightly reduced with increasing distance from the cathode, which can be explained by collisions of ions with the background of neutrals. The ion velocity was increased when the arc current was increased, which correlated with enhanced arc voltage and power dissipation. The ion velocity could be enhanced when the plasma was produced in a non-uniform magnetic field.

Generations of students in radiation biology have been taught that heritable biological damage requires direct damage to DNA. We now know that this is not true. The Bystander Effect is the name given to the phenomenon whereby biological effects are observed in cells that are not themselves traversed by a charged particle, but are in close proximity to cells that are. Several research groups have convincingly demonstrated a bystander effect for alpha particle, which are heavy and high LET, because charged particles can be focused into a tiny beam that can be directed onto individual cells. The biological effects seen in adjacent non-hit cells clearly represents a bystander effect. It is not so easy to demonstrate a similar effect for x-rays or for the electrons set in motion by the absorption of x-rays. In this project we used two types of cell that could be recognized one from the other. One cell type was fed radioactive tritiated thymidine, which is incorporated into the DNA, . The tritium emits electrons which have a very short range so that they do not even get out of the cell. These cells were then mixed with a different type of cell which are routinely …

This report presents a methodology developed to study the future impact of wind on BPA power system load following and regulation requirements. The methodology uses historical data and stochastic processes to simulate the load balancing processes in the BPA power system, by mimicking the actual power system operations. Therefore, the results are close to reality, yet the study based on this methodology is convenient to conduct. Compared with the proposed methodology, existing methodologies for doing similar analysis include dispatch model simulation and standard deviation evaluation on load and wind data. Dispatch model simulation is constrained by the design of the dispatch program, and standard deviation evaluation is artificial in separating the load following and regulation requirements, both of which usually do not reflect actual operational practice. The methodology used in this study provides not only capacity requirement information, it also analyzes the ramp rate requirements for system load following and regulation processes. The ramp rate data can be used to evaluate generator response/maneuverability requirements, which is another necessary capability of the generation fleet for the smooth integration of wind energy. The study results are presented in an innovative way such that the increased generation capacity or ramp requirements are compared …

The objectives of this paper are: (1) identify thermal issues of ultracapacitor cells and modules over a range of vehicle duty cycles to understand and minimize thermal impacts; and (2) identify improvements for ultracapacitor thermal management.

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