A letter report issued by the Government Accountability Office with an abstract that begins "To address the strain on the aviation system, the Federal Aviation Administration (FAA) has proposed transitioning to the Next Generation Air Transportation System (NextGen). To fund this system and to make its costs to users more equitable, the Administration has proposed fundamental changes in the way that FAA is funded. As part of the reauthorization, the Administration proposes major changes in the way that grants through the Airport Improvement Program (AIP) are funded and allocated to the 3,400 airports in the national airport system. In response, GAO was asked for an update on current funding levels for airport development and the sufficiency of those levels to meet planned development costs. This report comprises capital development estimates made by FAA and Airports Council International (ACI), a leading industry association; analyzes how much airports have received for capital development and if sustained, whether it can meet future planned development; and summarizes the effects of proposed changes in funding for airport development. Airport funding and planned development data are drawn from the best available sources and have been assessed for their reliability. The Department of Transportation agreed with the …

This report is about American War and military operations casualties in the form of lists and statistics.

This report briefly discusses the basic concepts on which these bills are based, and compares major provisions of the bills in each of the following categories: climate change research; emissions reduction technologies; U.S. actions pursuant to international emission reduction agreements; adaptation to the effects of climate change; GHG reporting and registration; and GHG emissions reduction programs.

A letter report issued by the Government Accountability Office with an abstract that begins "At annual meetings, shareholders of public corporations can vote on various issues (e.g., mergers and acquisitions) through a process called proxy voting. Institutional investors (e.g., mutual funds and pension funds) cast the majority of proxy votes due to their large stock holdings. In recent years, concerns have been raised about a group of about five firms that provide research and recommendations on proxy votes to their institutional investor clients. GAO was asked to report on (1) potential conflicts of interest that may exist with proxy advisory firms and the steps that the Securities and Exchange Commission (SEC) has taken to oversee these firms; (2) the factors that may impede or promote competition within the proxy advisory industry; and (3) institutional investors' use of the firms' services and the firms' potential influence on proxy vote outcomes. GAO reviewed SEC examinations of proxy advisory firms, spoke with industry professionals, and conducted structured interviews with 31 randomly selected institutional investors. GAO is not making any recommendations."

A letter report issued by the Government Accountability Office with an abstract that begins "Under time-and-materials contracts, payments to contractors are made based on the number of labor hours billed at hourly rates and, if applicable, other direct costs. Because of the risk they pose to the government, their use is supposed to be limited to cases where no other contract type is suitable. GAO was asked to identify trends in the Department of Defense's (DOD) obligations under time-and-materials contracts; analyze what DOD is buying under these contracts; assess why DOD is using them and whether actions are being taken to ensure that they are used only when no other contract type is suitable; evaluate DOD's monitoring of contractor performance; and determine the differences between the labor rates prime contractors bill DOD and the rates in their subcontracts. GAO reviewed 82 time-and-materials contracts, agreements, and orders and examined prime contract and subcontract labor rates on 12 additional contracts or agreements."

A letter report issued by the Government Accountability Office with an abstract that begins "During Operation Iraqi Freedom, the Army and the Marine Corps experienced problems with the delivery of supplies to the warfighter. Such problems highlight long-standing weaknesses in the Department of Defense's (DOD) supply chain management. DOD has identified joint theater logistics as a key effort aimed at improving distribution and supply support. GAO was asked to examine DOD's efforts to develop and implement joint theater logistics. GAO assessed (1) the extent to which DOD's approach to managing joint theater logistics departmentwide encompasses sound management principles and (2) the progress DOD has made in implementing joint theater logistics initiatives. GAO reviewed DOD documents and interviewed officials from the Joint Staff, services, agencies, and geographic combatant commands."

Use of a one-dimensional model of longitudinal space-charge(SC) impedance has been proposed for studying the microbunchinginstability in single-pass delivery systems relevant for the nextgeneration of FELs. For beams with uniform transverse density andcircular cross-section of radius r_b the SC impedance can be expressed ina handy analytical form, making this model particularly convenient. Inthis report we show how with an appropriate choice of r_b one can usethis as an effective-beam model to approximate beams with non-axissymmetric and non-uniform transverse densities.

A letter report issued by the Government Accountability Office with an abstract that begins "The Emergency Management Assistance Compact (EMAC) is a collaborative arrangement among member states that provides a legal framework for requesting resources. Working alongside federal players, including the Federal Emergency Management Agency (FEMA) and the National Guard Bureau, EMAC members deployed an unprecedented level of assistance in response to hurricanes Katrina and Rita. Although EMAC played a critical role in our nation's response to these hurricanes, the magnitude of these events revealed limitations. GAO was asked to (1) examine how the use of EMAC has changed since its inception; (2) assess how well existing policies, procedures, and practices facilitate collaboration; and (3) evaluate the adequacy of the EMAC network's administrative capacity to achieve its mission. GAO examined documents and interviewed officials from 45 federal, state, and local agencies and offices."

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A letter report issued by the Government Accountability Office with an abstract that begins "The Federal Housing Administration (FHA) historically has been an important participant in the mortgage market, which includes loans that carry government insurance or guarantees (such as FHA-insured mortgages) and those that do not (conventional mortgages). The conventional market comprises prime loans for the most creditworthy borrowers and subprime loans for borrowers with impaired credit. Reduced demand for FHA-insured mortgages--which are used primarily by borrowers who would have difficulty obtaining conventional prime loans--has raised questions about the agency's role in and ability to adapt to the mortgage market. This report discusses (1) trends in FHA's share of the market for home purchase mortgages from 1996 through 2005, and how they compared with the trends for other market segments; and (2) factors associated with the trends in FHA's market share and the implications of these trends for homebuyers and FHA. To address these objectives, GAO analyzed FHA and Home Mortgage Disclosure Act (HMDA) data and interviewed officials from FHA and other mortgage institutions."

A letter report issued by the Government Accountability Office with an abstract that begins "In recent years, the Federal Housing Administration (FHA) has experienced a sharp decline in market share. Also, the agency has estimated that, absent program changes, its Mutual Mortgage Insurance Fund (Fund) would require appropriations in 2008. To adapt to market changes, FHA has implemented new procedures and proposed the following major legislative changes: raising FHA's loan limits, allowing risk-based pricing, and lowering down-payment requirements. GAO was asked to report on (1) the likely program and budget impacts of FHA's modernization efforts; (2) the tools, resources, and risk management practices important to FHA's implementation of the legislative proposals, if passed; and (3) other options that FHA and Congress could consider to help FHA adapt to market changes. To address these objectives, GAO analyzed FHA and Home Mortgage Disclosure Act (HMDA) data and interviewed officials from FHA and other mortgage institutions."

Boeing Phantom Works and its team originally proposed a three-year Phase III SPI project to develop a 30-kWh flywheel with a 100 kW power capability as a power risk management system (RMS) for power users and providers. The chief objectives for the Risk Management System Flywheel were to (1) demonstrate its ability to protect a critical load such as a small data center from swings in power availability, cost, and power factor and (2) show that the RMS flywheel can perform these functions with reduced noise, emissions, and operating costs when compared with non-HTS competitors including batteries, diesel generators, and microturbines.

Guidance issued by the Government Accountability Office with an abstract that begins "This publication has been superseded by GAO-07-1173G, Financial Audit Manual: Volume Three, August 2007. The U.S. Government Accountability Office (GAO) and the President's Council on Integrity and Efficiency (PCIE) maintain the GAO/PCIE Financial Audit Manual (FAM). The FAM provides guidance for performing financial statement audits of federal entities. The FAM is a key tool for enhancing accountability over taxpayer-provided resources."

Mirror symmetry is one of the most beautiful symmetries in string theory. It helps us very effectively gain insights into non-perturbative worldsheet instanton effects. It was also shown that the study of mirror symmetry for Calabi-Yau flux compactification leads us to the territory of ''Non-Kaehlerity''. In this thesis we demonstrate how to construct a new class of symplectic non-Kaehler and complex non-Kaehler string theory vacua via generalized geometric transitions. The class admits a mirror pairing by construction. From a variety of sources, including super-gravity analysis and KK reduction on SU(3) structure manifolds, we conclude that string theory connects Calabi-Yau spaces to both complex non-Kaehler and symplectic non-Kaehler manifolds and the resulting manifolds lie in generalized complex geometry. We go on to study the topological twisted models on a class of generalized complex geometry, bi-Hermitian geometry, which is the most general target space for (2, 2) world-sheet theory with non-trivial H flux turned on. We show that the usual Kaehler A and B models are generalized in a natural way. Since the gauged supergravity is the low energy effective theory for the compactifications on generalized geometries, we study the fate of flux-induced isometry gauging in N = 2 IIA and heterotic …

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Testimony issued by the Government Accountability Office with an abstract that begins "More international students obtain a higher education in the United States than in any other country, and they make valuable contributions while they are here. For those students returning home after their studies, such exchanges support federal public diplomacy efforts and can improve understanding among nations. International students have earned about one-third or more of all U.S. degrees at both the master's and doctoral levels in several of the science, technology, engineering, and mathematics fields. Yet recent trends, including a drop in international student enrollment in U.S. colleges and universities, and policy changes after September 11, 2001, have raised concerns about whether the United States will continue to attract talented international students to its universities. This testimony is based on ongoing and published GAO work. It includes themes from a September 2006 Comptroller General's forum on current trends in international student enrollment in the United States and abroad. Invitees to the forum included experts from the Congress, federal agencies, universities, research institutions, higher education organizations, and industry."

The content of this report is based upon the author's personal experience living and working in Hong Kong in 1984, 1991, 1992, and 1994 to 1998, as well as a series of interviews conducted in Hong Kong in May and June 2007 and a variety of studies and reports on the status of Hong Kong since the Handover.

An important action item for the damping rings of theInternational Linear Collider (ILC) is to compute the broad-bandimpedance and, from it, the threshold to the microwave instability. Wereport on the status of our study and provide a preliminary estimate ofthe instability threshold based on impedance models developed sofar.

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We report a first combination of diamond anvil cell radialx-ray diffraction with in situ laser heating. The laser-heating setup ofALS beamline 12.2.2 was modified to allow one-sided heating of a samplein a diamond anvil cell with an 80 W yttrium lithium fluoride laser whileprobing the sample with radial x-ray diffraction. The diamond anvil cellis placed with its compressional axis vertical, and perpendicular to thebeam. The laser beam is focused onto the sample from the top while thesample is probed with hard x-rays through an x-ray transparentboron-epoxy gasket. The temperature response of preferred orientation of(Fe,Mg)O is probed as a test experiment. Recrystallization was observedabove 1500 K, accompanied by a decrease in stress.

Correspondence issued by the Government Accountability Office with an abstract that begins "Referred to as our "third border," the Caribbean Basin has significant maritime links with the United States. Given these links and the region's proximity, the United States is particularly interested in ensuring that the ports in the Caribbean Basin--through which goods bound for this country's ports and cruise ships carrying its citizens must travel--are secure. Section 233 (c) of the Security and Accountability for Every Port Act of 2006 (SAFE Port Act) requires GAO to report on various security-related aspects of Caribbean Basin ports. Our specific objectives were to identify and describe the (1) threats and security concerns in the Caribbean Basin related to port security, (2) actions that foreign governments and local stakeholders have taken in the Caribbean Basin to implement international port security requirements and the challenges that remain, (3) activities reported to be under way by U.S. government agencies to enhance port security in the Caribbean Basin, and (4) potential economic impacts of port security and terrorist attacks in the Caribbean Basin. Between March 29 and April 13, 2007, we briefed Congress on the results of our work to address these objectives. This report summarizes …

A letter report issued by the Government Accountability Office with an abstract that begins "The Centers for Medicare & Medicaid Services (CMS) adjusts Medicare physician fees for geographic differences in the costs of operating a medical practice. CMS uses 89 physician payment localities among which fees are adjusted. Concerns have been raised that the boundaries of some payment localities do not accurately address variations in physicians' costs. GAO was asked to examine how CMS has revised the localities; the extent to which they accurately reflect variations in physicians' costs; and alternative approaches to constructing the localities. To do so, GAO reviewed selected Federal Register documents; compared data on the costs physicians incur in different areas with the Medicare geographic adjustment; and used the physician cost data to construct and evaluate alternative approaches."

A letter report issued by the Government Accountability Office with an abstract that begins "The 2005 Base Realignment and Closure (BRAC) recommendation to establish fleet readiness centers was expected to yield more savings than any other of the 2005 BRAC recommendations. To achieve these savings the Navy plans to integrate civilian depot personnel to complete some repairs at intermediate maintenance departments to reduce aviation maintenance costs. This report, prepared under the Comptroller General authority to conduct evaluations on his own initiative, is one in a series of reports related to the 2005 BRAC recommendations. GAO's objectives were to (1) analyze the reasons for changes in costs and savings estimates since the recommendation was approved, and (2) identify challenges in implementing this BRAC recommendation. GAO analyzed Navy and BRAC Commission costs and savings estimates and interviewed officials at the Naval Air Systems Command and at three fleet readiness centers."

Correspondence issued by the Government Accountability Office with an abstract that begins "Members of the military have long been required to receive immunizations. The Department of Defense (DOD) estimates that over 2.2 million servicemembers receive at least one mandatory immunization annually. Immunizations are provided through the administration of vaccines, which contain "antigens" or parts of a specific virus or bacterium that are used to trigger an immune response to protect the body from disease. DOD's immunization requirements vary depending on several factors, such as a servicemember's branch of military service, location, age, and type of personnel, such as newly enlisted recruits, those conducting high-risk travel, and reserve forces. No immunization is completely safe. Like all individuals, servicemembers may experience side-effects as a result of their immunizations, known as adverse events. Most adverse events consist of relatively mild reactions, such as swelling near the site of the immunization. However, a small number of individuals may experience more severe reactions, such as some servicemembers who received the anthrax and smallpox vaccines. Some servicemembers who received these vaccines experienced severe reactions such as migraines, heart problems, and the onset of diseases including diabetes and multiple sclerosis. Since then, the adverse events associated with …