This note considers some of the properties of the Stokes pulse that grows from a specified seed pulse in the presence of a strong pump pulse as it propagates through a dispersive atomic vapor. We first present an generic dimensionless form for the coupled equations that govern the propagation of pump and Stokes fields or collinear plane-wave pulses. By treating the two fields we permit pump depletion. We include transient atomic response (as embodied in the Raman coherence), but neglect changes in atomic populations. (Thus our equations pertain to the regime in which atoms are more numerous than photons). The equations employ a gain length, a dispersion time {tau}{sub dis}, and a Raman coherence time (or memory time) {tau}{sub R} as basic parameters: these two times, together with a single-photon stationary-atom detuning {Delta}, subsume the details of a particular atomic Raman transition and particular operating conditions. (The effects of Doppler shifts enters the equations through the coherence time). We discuss some general properties of these generic Raman propagation equations, and present illustrations of their solutions in the absence of dispersion. We comment on departures from exponential growth. We than show examples of behavior when dispersion is present and the pump …

This report addresses the constitutionality of the president and vice president being residents of the same state.

The Seismic Safety Margins Research Program (SSMRP) is an NRC-funded, multiyear program conducted by Lawrence Livermore National Laboratory (LLNL). Its goal is to develop a complete, fully coupled analysis procedure (including methods and computer codes) for estimating the risk of an earthquake-caused radioactive release from a commercial nuclear power plant. The analysis procedure is based upon a state-of-the-art evaluation of the current seismic analysis and design process and explicitly includes the uncertainties inherent in such a process. The results will be used to improve seismic licensing requirements for nuclear power plants. As currently planned, the SSMRP will be completed in September, 1984. This document presents the program plan for work to be done during the remainder of the program. In Phase I of the SSMRP, the necessary tools (both computer codes and data bases) for performing a detailed seismic risk analysis were identified and developed. Demonstration calculations were performed on the Zion Nuclear Power Plant. In the remainder of the program (Phase II) work will be concentrated on developing a simplified SSMRP methodology for routine probabilistic risk assessments, quantitative validation of the tools developed and application of the simplified methodology to a Boiling Water Reactor. (The Zion plant is a …

This document reports the following: atomic absorption spectroscopy of Ir in Pu-Ir alloys; removal of Pu from soil; surface microanalysis using elemental x-ray mapping; microscopic scanning of Ga in Pu; microscopy of defects in Pu; emission spectroscopy of Ir and Y in PuO/sub 2/; gas chromatograhy of PCB's in transformer oils and water; liquid chromatography of chlorophenoxy acid herbicides in water; solution analysis by spark source mass spectrometry; a portable gas sampling system; flammability testing of HEPA filter materials; identification of Nomex and Kapton in fiberglass filters; bromine in Be density problem; x-ray fluorescence of Nb in U-Nb alloys; reactions in Pu-nitric acid-ethylene glycol; gas-fusion analysis of oxygen in chromium; analysis of sulfate and chloride in water-soluble oils; and decontamination of surface coatings. (DLC)

A letter report issued by the Government Accountability Office with an abstract that begins "The Federal Transit Administration's (FTA) Capital Investment Grant program funds, among other things, projects for fixed-guideway systems--often called New Starts projects. In 2005, the Safe, Accountable, Flexible, Efficient Transportation Equity Act-A Legacy for Users (SAFETEA-LU) established a category of lower-cost projects--Small Starts--which expands project eligibility and offers streamlined requirements. FTA subsequently created the Very Small Starts category with a further streamlined process for very low-cost projects. Exempt projects, those receiving under $25 million and typically designated by Congress, also have a simplified process. As part of GAO's annual mandate to review New Starts, this report describes (1) the history of Small Starts and Very Small Starts and the type of projects FTA recommended for funding; (2) the project development requirements for Small Starts and Very Small Starts and what stakeholders identify as the advantages and disadvantages of the requirements; and (3) the project development requirements for exempt projects, the projects selected to receive funding, and what stakeholders identify as the advantages and disadvantages of this category. Among other things, GAO analyzed laws, regulations, and agency guidance, and interviewed FTA headquarters staff and stakeholders from 7 FTA …

This report briefly outlines the background of ethics enforcement in the House of Representatives, including the creation of both the Select Committee on Ethics and the Committee on Standards of Official Conduct. The report also focuses on various jurisdictional and procedural changes that the committee has experienced since 1967 and discusses the committee's current jurisdiction and procedures.

A letter report issued by the Government Accountability Office with an abstract that begins "The Department of Defense (DOD) has taken some actions to manage its department-level risks associated with preparing auditable financial statements through its Financial Improvement and Audit Readiness (FIAR) Plan. However, its actions were not fully in accordance with widely recognized guiding principles for effective risk management, which include (1) identifying risks that could prevent it from achieving its goals, (2) assessing the magnitude of those risks, (3) developing risk mitigation plans, (4) implementing mitigating actions to address the risks, and (5) monitoring the effectiveness of those mitigating actions. DOD did not have documented policies and procedures for following these guiding principles to effectively manage risks to the implementation of the FIAR Plan."

A letter report issued by the Government Accountability Office with an abstract that begins "To help the Department of State (State) meet its requirements for critical goods and services in Iraq and Afghanistan, the Department of Defense (DOD) supported State on 22 acquisitions. On State's behalf, DOD awarded and manages 20 acquisitions, known as assisted interagency acquisitions, under the authority of the Economy Act with an estimated value of almost $1 billion for basic support goods and services and security services. DOD also supported two of State's acquisitions for medical services and unmanned aerial vehicles. Across the 22 acquisitions, DOD has been involved in one or more aspects of the acquisition cycle, including planning, award, management, and oversight. GAO identified at least 128 DOD personnel with contracting and subject matter expertise who provided support for these acquisitions."

A letter report issued by the General Accounting Office with an abstract that begins "Strategic human capital management challenges face public sector organizations both here and abroad. The United States is not alone in examining how government agencies can use their performance management systems as a tool to foster a more results-oriented organizational culture. The Organization for Economic Cooperation and Development (OECD) has reported that its member nations have increasingly moved towards performance-based pay and appraisal systems that reward employees, hold them accountable for the quality of their work, and connect their efforts to organizational results. Four OECD member countries--Australia, Canada, New Zealand, and the United Kingdom--have begun to use their performance management systems to achieve results. Although the performance management initiatives in these countries reflect their specific organizational structures, cultures, and priorities, their experiences developing and implementing results-oriented individual performance management initiatives may provide U.S. agencies with information and insights as they implement strategic human capital practices. These countries have begun to use their performance management systems to create a "line of sight" between individual and organizational goals, use competencies to provide a fuller assessment of individual performance, link pay to individual and overall organizational performance, and foster organizationwide …

A letter report issued by the Government Accountability Office with an abstract that begins "Most major U.S. airports have some degree of physical proximity to intercity passenger rail stations, though only 2 airports are currently collocated with intercity rail stations. Specifically, 42 of the nation's 60 large and medium hub airports are located within 10 miles of Amtrak stations; 21 of the 42 airports are within 5 miles of Amtrak stations. At the 2 collocated airports, passengers can access Amtrak either via an automated people mover (Newark Liberty International Airport) or by walking (Bob Hope Burbank Airport). At some airports, such as Baltimore/Washington International Thurgood Marshall Airport, passengers can take a direct shuttle between the airport and the nearby Amtrak station, while at other airports, connections to Amtrak can be made through other modes of transportation. Studies and data, while limited, suggest that relatively few passengers in the United States use intercity rail to travel to and from the airport or through more integrated travel such as code-sharing agreements, whereby airlines sell tickets for Amtrak's service. The only existing air-rail code-sharing agreement in the United States is at Newark Airport. Amtrak and states are considering projects to expand intercity rail …

A letter report issued by the Government Accountability Office with an abstract that begins "Developing capable Iraqi and Afghan security forces is a key component of the U.S. military effort in Iraq and Afghanistan and, in 2009, the Army began augmenting brigade combat teams (BCT) with advisor personnel to advise the host nation security forces in these countries. House Armed Services Committee report 111-491 directed GAO to report on the Army's plans to augment BCTs to perform advising missions in Iraq and Afghanistan. This report (1) identifies the key characteristics of the augmented BCT concept; (2) assesses the extent to which the Army has provided augmented BCTs, and what challenges, if any, these units have faced; and (3) assesses the extent to which requirements for augmented BCTs have impacted overall Army personnel requirements, including the Army's ability to provide advisor personnel. GAO examined augmented BCT doctrine and guidance, analyzed advisor requirements, reviewed after- action reviews and lessons learned from augmented BCTs, and interviewed Army, theater command, and augmented BCT officials."

A letter report issued by the Government Accountability Office with an abstract that begins "Nuclear power reactors generate highly radioactive waste. To permanently store this waste, the Department of Energy (DOE) has been working to submit a license application to the Nuclear Regulatory Commission (NRC) for a nuclear waste repository at Yucca Mountain about 100 miles from Las Vegas, Nevada. Although the project has been beset with delays, in part because of persistent problems with its quality assurance program, DOE stated in July 2006 that it will submit a license application with NRC by June 30, 2008. NRC states that a high-quality application needs to be complete, technically adequate, transparent by clearly justifying underlying assumptions, and traceable back to original source materials. GAO examined (1) DOE's development of its schedule for submitting a license application and the stakeholders with whom it consulted, (2) NRC's assessment of DOE's readiness to submit a high-quality application, and (3) DOE's progress in addressing quality assurance recommendations and challenges identified in GAO's March 2006 report. GAO reviewed DOE's management plan for creating the license application, reviewed correspondence and attended prelicensing meetings between DOE and NRC, and interviewed DOE managers and NRC on-site representatives for the …

A letter report issued by the Government Accountability Office with an abstract that begins "Since fiscal year 2005, the number of federal non-postal civilian and non-tactical military vehicles has increased about 7 percent, from about 420,000 to 449,000 vehicles. However, from fiscal year 2005 to 2011, some agencies decreased their fleets, and the change in fleet size from agency to agency varied considerably. For example, one-third of the agencies (8 of 24) with the largest number of vehicles decreased their fleets by at least 2 percent during this period. Of the 4 agencies GAO selected for review, the Departments of Agriculture (USDA) and Veterans Affairs (VA) increased their fleets 5 and 49 percent, respectively since fiscal year 2005; the U.S. Air Force and Department of the Interior (Interior) decreased their fleets 7 and 9 percent, respectively. Overall, federal agencies increased the portion of their fleets made up of alternative fuel vehicles (e.g., vehicles that operate using ethanol or batteries) from about 14 percent to 33 percent from fiscal years 2005 to 2011. In addition, GAO found that 8 agencies accounted for almost 80 percent of total federal vehicles in fiscal year 2011, while 35 other agencies held the remaining vehicles."

A letter report issued by the Government Accountability Office with an abstract that begins "This report responds to section 112, Division B, of the Consolidated Appropriations Act of 2004, which directs GAO to review federal programs benefiting rural communities in Alaska. After discussions with congressional staff, GAO agreed to examine federal programs benefiting Alaska Native villages. Specifically, this report (1) provides information on the amount of federal assistance provided to Alaska Native villages during fiscal years 1998 through 2003, (2) describes how selected federal funds have been used to assist Alaska Native villages, and (3) provides data on the number and average cost of houses built by villages and Alaska Native regional housing authorities."

A letter report issued by the Government Accountability Office with an abstract that begins "Concerns over national security, environmental stresses, and high fuel prices have raised interest in reducing oil consumption. Through the Corporate Average Fuel Economy (CAFE) program, the National Highway Traffic Safety Administration (NHTSA) requires cars and light trucks to meet certain fuel economy standards. As requested, GAO discusses (1) how CAFE standards are designed to reduce fuel consumption, (2) strengths and weaknesses of the CAFE program and NHTSA's capabilities, and (3) market-based policies that could complement or replace CAFE. To do this work, GAO reviewed recent studies and interviewed leading experts and agency officials."

A letter report issued by the General Accounting Office with an abstract that begins "The Farm Credit Administration (FCA) regulates the farm credit system. Administrative expenses, which accounted for about 97 percent of FCA's total operating expenses of $34.5 million in fiscal year 2000, are funded primarily by assessments on the institutions that make up the system, including the Federal Agricultural Mortgage Corporation (Farmer Mac). This report (1) analyses trends in administrative expenses for fiscal years 1996 through 2000 and (2) compares ways that FCA and other federal financial regulators calculate the assessments they need to fund their operations. GAO found that although FCA's administrative expenditures varied each year between 1996 and 2000, they remained below 1996 levels and stayed within congressionally imposed annual spending limits for each year during 1997 through 2000. Between 1996 and 2000, the agency experienced a decline in administrative spending of around $2 million, or 5.8 percent. Personnel costs were the largest single expense, consistently accounting for more than 80 percent of administrative spending; thus, a 15 percent staff reduction also provided the greatest overall savings. Unlike many government agencies whose operations are funded by taxpayers' money, the federal financial regulators are self-funded agencies that …

A letter report issued by the General Accounting Office with an abstract that begins "For national security and foreign policy reasons, U.S. export control policy seeks to balance economic interests in promoting high technology exports with national security interests to maintain a military advantage in high performance computers over potential adversaries. In January 2002, the President announced that the control threshold--above which computers exported to countries such as China, India, and Russia--would increase from 85,000 millions of theoretical operations per second (MTOPS) to 190,000 MTOPS. The report justifying the changes in control thresholds for high performance computers focused on the availability of such computers. However, the justification did not fully address the requirements of the National Defense Authorization Act of 1998. The December 2001 report did not address several key issues related to the decision to raise the threshold: (1) the unrestricted export of computers with performance capabilities between the old and new thresholds will allow countries of concern to obtain computers that they have had difficulty constructing on their own, (2) the United States is unable to monitor the end-uses of many of the computers it exports, and (3) the report does not acknowledge the multilateral process used to …

A letter report issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO provided information on payroll taxes owed to the federal government and the associated trust fund recovery penalties assessed individuals responsible for the nonpayment of these taxes, focusing on the: (1) extent to which payroll taxes are not remitted to the federal government; (2) magnitude of the trust fund recovery penalties assessed against individuals of organizations that withheld federal payroll taxes from employees' salaries but did not forward them; (3) extent to which individuals who have not remitted payroll taxes are responsible for not paying these taxes at multiple businesses; (4) extent to which businesses and individuals who failed to pay payroll taxes are also receiving federal benefits or other federal payments; and (5) factors that affect the Internal Revenue Service's (IRS) ability to enforce compliance or pursue collections in this area."

A letter report issued by the General Accounting Office with an abstract that begins "To deter illegal entry between the nation's ports of entry, the Immigration and Naturalization Service (INS) developed its Southwest Border Strategy. INS has spent seven years implementing the border strategy, but it may take INS up to a decade longer to fully implement the strategy. This assumes that INS obtains the level of staff, technology, equipment, and fencing it believes it needs to control the Southwest border. Although illegal alien apprehensions have shifted, there is no clear indication that overall illegal entry into the United States along the Southwestern border has declined. INS' current efforts to measure the effectiveness of its border control efforts could be enhanced by analyzing the data in its automated biometric identification system (IDENT). These data offer INS an opportunity to develop additional performance indicators that could be incorporated into its Annual Performance Plan review process and could help INS assess whether its border control efforts are associated with an overall reduction in the flow of illegal aliens across the border. Borderwide analysis of the IDENT data could be used to address several important questions related to illegal entry. The strategy's impact …

The Standard Model of particle physics, together with the Big Bang model of the early universe, constitute a framework which encompasses our current understanding of fundamental laws and beginning of our universe. Despite recent speculative trends, quantum field theory remains the theoretical tool of choice for investigating new physics either at high energy colliders, or in the early universe. In this dissertation, several field theoretic phenomena relevant to cosmology or particle physics are explored. A common theme in these explorations is the structure of the vacuum state in quantum field theory. First, we discuss first-order phase transitions in the early universe, in which the effective vacuum state of the universe shifts discontinuously as the temperature drops below some critical point. We find that the dynamics of a certain type of first-order phase transition can lead to production of primordial black holes, which could constitute the dark matter of our universe. Alternatively, supercooled first-order phase transitions may be the cause of an extended inflationary epoch in the early universe, which is generally regarded as necessary to solve several cosmological puzzles. We derive limits on such scenarios based on nearly model-independent percolation properties of the transition. We also study some nonperturbative aspects …

A letter report issued by the Government Accountability Office with an abstract that begins "Since 1990, GAO has identified the Department of Defense's (DOD) inventory management as a highrisk area. Ineffective management practices--such as the use of inaccurate data, lack of inventory controls and visibility, and information system weaknesses--have contributed to high levels of inventory. DOD has reduced its inventory since 1990, from about $100 billion to about $67 billion as of September 30, 2002. However, at the start of Operation Enduring Freedom, about half of the inventory exceeded current operating requirements. GAO, under its statutory authority, analyzed the extent to which inventory that exceeded current operating requirements as of September 30, 2001, was consumed through cutoff dates ranging from March through October 2003 and identified three ineffective and inefficient inventory management practices."

This report was prepared in response to the request from Congress stated in Public Law 109-431 (H.R. 5646),"An Act to Study and Promote the Use of Energy Efficient Computer Servers in the United States." This report assesses current trends in energy use and energy costs of data centers and servers in the U.S. (especially Federal government facilities) and outlines existing and emerging opportunities for improved energy efficiency. It also makes recommendations for pursuing these energy-efficiency opportunities broadly across the country through the use of information and incentive-based programs.

This report is the appendices to a companion report, prepared in response to the request from Congress stated in Public Law 109-431 (H.R. 5646),"An Act to Study and Promote the Use of Energy Efficient Computer Servers in the United States." This report assesses current trends in energy use and energy costs of data centers and servers in the U.S. (especially Federal government facilities) and outlines existing and emerging opportunities for improved energy efficiency. It also makes recommendations for pursuing these energy-efficiency opportunities broadly across the country through the use of information and incentive-based programs.

The summary of this presentation is that: (1) We do end-to-end systems analysis for infrastructure protection; (2) LLNL brings interdisciplinary subject matter expertise to infrastructure and explosive analysis; (3) LLNL brings high-fidelity modeling capabilities to infrastructure analysis for use on high performance platforms; and (4) LLNL analysis of infrastructure provides information that customers and stakeholders act on.