Several new types of silicon-containing preceramic polymers, i.e., poly(diorganosilacetylene) and poly(diorganosilvinylene) have been synthesized with molecular weights from 10,000 to 120,000. These polymers could be thermally converted to SiC with a moderate to high char yields. Ready solubility and good processability made these types of polymers attractive in their applications to ceramics. The thermal polymerization of diethynyldiphenyl-silane, which was reported in 1968 to afford poly(diphenylsilyldiacetylene) via dehydrogenation, was reinvestigated. Spectroscopic studies showed that the polymer had a structure of polyacetylene type not diacetylene. Diphenyldiethynylgermane and a series of diorganodiethynylsilances were synthesized. These could be polymerized in the presence of MoCl{sub 5} or WCl{sub 6} to afford a soluble, violet material with Mw as high as 108,000. 100 refs., 56 figs., 16 tabs.

Reaction kinetic measurements on the hydrochlorination of SiCl/sub 4/ and m.g. silicon metal were last reported as a function of reaction temperature, reactor pressure, H/sub 2//SiCl/sub 4/ ratio and silicon metal particle size distribution, 3 SiCl/sub 4/ + 2 H/sub 2/ + Si reversible 4 SiHCl/sub 3/. The effect of impurities in the m.g. silicon metal on the rate of this reaction has been investigated in this quarter. The m.g. silicon was replaced with high purity, electronic grade silicon metal in the hydrochlorination reaction. With electronic grade Si, the reaction rate was found to be about one order of magnitude slower than those obtained with m.g. silicon metal. These metallic impurities in the m.g. silicon appear to have a catalytic effect. Addition of 5 wt% cuprous chloride to the electronic grade Si mass bed increased the reaction rate to the same level as those obtained with m.g. silicon with 5% CuCl added. The effect of prolonged reaction time on the hydrochlorination reaction was studied. The plan is to run the reaction for long periods of time with the objective of studying the life of the Si mass bed. No significant change in the reaction rate was observed after about 80 …

This report lists and describes federal health, education, and welfare programs available to Native Americans living on federal reservations.

An exhaustive study was conducted to determine the feasibility of Nernst-type oxygen sensors based on ceramics containing Bi{sub 2}O{sub 3}. The basic sensor design consisted of a ceramic sensing module sealed into a metal tube. The module accommodated an internal heater and thermocouple. Thermal-expansion-matched metals, adhesives, and seals were researched and developed, consistent with sequential firings during sensor assembly. Significant effort was devoted to heater design/testing and to materials' compatibility with Pt electrodes. A systematic approach was taken to develop all sensor components which led to several design modifications. Prototype sensors were constructed and exhaustively tested. It is concluded that development of Nerst-type oxygen sensors based on Bi{sub 2}O{sub 3} will require much further effort and application of specialized technologies. However, during the course of this 3-year program much progress was reported in the literature on amperometric-type oxygen sensors, and a minor effort was devoted here to this type of sensor based on Bi{sub 2}O{sub 3}. These studies were made on Bi{sub 2}O{sub 3}-based ceramic samples in a multilayer-capacitor-type geometry and amperometric-type oxygen sensing was demonstrated at very low temperatures ({approximately} 160{degree}C). A central advantage here is that these types of sensors can be mass-produced very inexpensively ({approximately} 20--50 cents …

Porous carbon fiber paper was selected as the cathode membrane and electrode assembly support based on over 1200 hr operational evaluation. Three potential anode supports are under test. All three appear technically satisfactory after 500 to 1200 hr operational evaluation on each. Optimization of molds and molding techniques for a foil backed ribbed carbon collector of bipolar design, including ribbed flow fields, manifolds, ports and sealing surfaces, is in process. Over 2800 hr demonstrated at 300/sup 0/F on platinum screened cell. Over 2200 hr demonstrated at 300/sup 0/F on cell with carbon cloth cathode current collector. Forty-eight hours screening tests of 56 different anode catalysts have been completed. A 500-hr life test program of 12 anode catalyst types which showed promise on the screening tests has been started. Attempts to stabilize RuO/sub x/ for use as an anode catalyst are being pursued. Low loaded cathodes on graphite substrates show performance to within 25 MV of baseline. Optimization of substrate thickness and fabrication procedures is continuing. Twenty-five low loaded anodes catalyst/substrate combinations have all shown poor performance stability with time. Continued development of the grafted TFS membrane has shown greatly improved physical characteristics and encouraging performance for samples in the 25 …

Report presenting performance tests of thermal ice-prevention equipment designed and installed in the XB-24F airplane in icing and non-icing conditions. The recorded temperature and air-flow data, and the calculated quantities of heat flow throughout the system are presented in tabular form.

Report presenting an investigation of an 18-foot-radius helicopter rotor powered by tip-mounted ramjet engines in the helicopter test tower. The engine performance is compared with the performance determined in a previous investigation of a 9-foot-radius rotor with the same engines at similar speeds but with twice the centrifugal forces. Results regarding the propulsive characteristics, minimum specific fuel consumption and corresponding propulsive thrust, and operational characteristics are provided.

This report provides an overview of guidelines that have governed planning for Department of Defense (DOD) operations over the last 30 years in the event of a funding lapse. It also discusses the implications of the guidelines for a possible impending shutdown and briefly reviews what is known about current DOD planning for a shutdown.

A letter report issued by the Government Accountability Office with an abstract that begins "Rising energy prices and concerns about the environment have fueled interest in "green building"--resource-efficient construction and maintenance practices that reduce adverse impacts on the natural environment. The Department of Housing and Urban Development (HUD), spends an estimated $5 billion on energy costs annually in its affordable housing programs and has recently taken steps to reduce its energy costs. GAO was asked to review (1) HUD's efforts to promote energy efficiency in its programs and the use of performance measures, (2) potential costs and long-term benefits of green building in HUD's affordable housing programs, and (3) lessons learned elsewhere that HUD could use to promote green building. GAO reviewed HUD program documents and studies on green building, interviewed HUD officials and industry representatives, and made site visits to locations that use green building practices."

A letter report issued by the Government Accountability Office with an abstract that begins "In 2010, over 40 percent of families receiving cash assistance through the Temporary Assistance for Needy Families (TANF) program were "child-only," meaning the adults in the household were not included in the benefit calculation, and aid was provided only for the children. TANF and child welfare programs provide cash assistance and other services that support children living with nonparent caregivers. The U.S. Department of Health and Human Services (HHS) Administration for Children and Families (ACF) oversees TANF and child welfare programs, which are administered by states. GAO was asked to examine the (1) trends and composition of the child-only caseload, (2) characteristics of caregivers and children in nonparent child-only cases, (3) factors influencing the level of benefits and services for children with non-parent caregivers, and (4) coordination efforts between state TANF and child welfare programs. GAO analyzed federal TANF and child welfare data; surveyed states; interviewed HHS officials and researchers; and conducted site visits in Tennessee, Texas, and Washington, selected for variation in TANF caseload characteristics and implementation of programs to support relative caregivers."

This report, which will be updated as warranted, describes statutory requirements for allocating congressional nominations to service academies. It also identifies the qualifications that must be met by potential nominees, as established by statute and each academy. Finally, sample documents that could be used by congressional offices at various stages of the nomination selection process are included.

A letter report issued by the Government Accountability Office with an abstract that begins "Changes in the climate attributable to increased concentrations of greenhouse gases may have significant impacts in the United States and the world. For example, climate change could threaten coastal areas with rising sea levels. Greenhouse gases already in the atmosphere will continue altering the climate system into the future, regardless of emissions control efforts. Therefore, adaptation--defined as adjustments to natural or human systems in response to actual or expected climate change--is an important part of the response to climate change. GAO was asked to examine (1) what actions federal, state, local, and international authorities are taking to adapt to a changing climate; (2) the challenges that federal, state, and local officials face in their efforts to adapt; and (3) actions that Congress and federal agencies could take to help address these challenges. We also discuss our prior work on similarly complex, interdisciplinary issues. This report is based on analysis of studies, site visits to areas pursuing adaptation efforts, and responses to a Web-based questionnaire sent to federal, state, and local officials."

A letter report issued by the Government Accountability Office with an abstract that begins "In recent years, global demand for petroleum products such as gasoline and diesel fuel has grown more quickly than the capacity to produce them, creating a tight market. U.S. refiners have been running near capacity, particularly during peak summer demand. In such conditions, unexpected refinery outages can result in price increases that adversely affect consumers. GAO was asked to evaluate (1) the trends in U.S. refinery outages over the last 5 years, in terms of reduced production capacity, frequency, and geographic location, and (2) the federal requirements for reporting outages at U.S. refineries. To evaluate these objectives, GAO obtained and analyzed Energy Information Administration (EIA) and commercial data, and obtained and analyzed federal legislation and policies, and interviewed federal agency, academic, and industry trade group officials."

A letter report issued by the Government Accountability Office with an abstract that begins "In 1992, Congress banned schools participating in federal student aid programs from paying commissions, bonuses, or other financial incentives to individuals based on their success in enrolling students or securing their financial aid. The ban applies to all postsecondary schools, including private for-profit, public, and private nonprofit schools. Congress instituted this incentive compensation ban to eliminate deceptive recruiting practices and to protect federal student aid funds from fraud and abuse. However, we recently found evidence of deceptive or fraudulent recruitment practices at certain postsecondary schools in which school officials misrepresented programs or encouraged students to falsify their financial aid applications to obtain federal student aid. Questions have been raised about whether schools are consistently acting in the best interest of students during the recruitment process, and whether the federal investment in student aid is adequately protected. The U.S. Department of Education (Education) is responsible for monitoring schools participating in federal student aid programs and enforcing compliance with the incentive compensation ban. Education has the authority to assess fines or take other actions against schools found violating the ban. In the Higher Education Opportunity Act, Congress mandated …

A letter report issued by the Government Accountability Office with an abstract that begins "The National Nuclear Security Administration's (NNSA) Tritium Readiness Program aims to establish an assured domestic source of tritium--a key isotope used in nuclear weapons--in order to maintain the U.S. nuclear weapons stockpile. Because tritium decays at a rate of 5.5 percent annually, it must be periodically replenished in the stockpile. However, since 2003, NNSA's efforts to produce tritium have been hampered by technical challenges. In this context, GAO was asked to (1) determine the extent to which NNSA has been able to overcome technical challenges producing tritium, (2) determine the extent to which NNSA is able to meet current and future nuclear weapons stockpile requirements for tritium, and (3) assess the management of NNSA's Tritium Readiness Program. To do this, GAO visited facilities involved in tritium production and reviewed tritium requirements established by NNSA and the Department of Defense, among other things."

A letter report issued by the Government Accountability Office with an abstract that begins "Among its responsibilities for aviation safety, the Federal Aviation Administration (FAA) issues thousands of certificates and approvals annually. These certificates and approvals, which FAA bases on its interpretation of federal standards, indicate that such things as new aircraft, the design and production of aircraft parts and equipment, and new air operators are safe for use in the national airspace system. Past studies and industry spokespersons assert that FAA's interpretations produce variation in its decisions and inefficiencies that adversely affect the industry. GAO was asked to examine the (1) extent of variation in FAA's interpretation of standards for certification and approval decisions and (2) views of key stakeholders and experts on how well these processes work. To perform the study, GAO reviewed industry studies and reports and FAA documents and processes; convened a panel of aviation experts; and interviewed officials from various industry sectors, senior FAA officials, and unions representing FAA staff."

A letter report issued by the Government Accountability Office with an abstract that begins "Since fiscal year 2002, the Transportation Security Administration (TSA) and the Department of Homeland Security (DHS) have invested over $795 million in technologies to screen passengers at airport checkpoints. The DHS Science and Technology Directorate (S&T) is responsible, with TSA, for researching and developing technologies, and TSA deploys them. GAO was asked to evaluate the extent to which (1) TSA used a risk-based strategy to prioritize technology investments; (2) DHS researched, developed, and deployed new technologies, and why deployment of the explosives trace portal (ETP) was halted; and (3) DHS coordinated research and development efforts with key stakeholders. To address these objectives, GAO analyzed DHS and TSA plans and documents, conducted site visits to research laboratories and nine airports, and interviewed agency officials, airport operators, and technology vendors."

A letter report issued by the Government Accountability Office with an abstract that begins "The Department of Defense (DOD) relies on thousands of suppliers to provide weapons, equipment, and raw materials to meet U.S. national security objectives. Yet, increased globalization in the defense industry and consolidation of the defense supplier base into a few prime contractors has reduced competition and single-source suppliers have become more common for components and subsystems. For this report, GAO (1) assessed DOD's efforts to monitor the health of its defense supplier base, and (2) determined how DOD identifies and addresses gaps that might exist in its supplier base. To conduct its work, GAO reviewed supplier-base-related laws, regulations, and guidelines; met with officials from DOD's Office of Industrial Policy, defense contractors, and other DOD officials; and surveyed 20 major DOD weapon acquisition program officials on potential supplier-base gaps."

A letter report issued by the Government Accountability Office with an abstract that begins "The International Atomic Energy Agency's (IAEA) safeguards system has been a cornerstone of U.S. efforts to prevent nuclear weapons proliferation since the Treaty on the Non-Proliferation of Nuclear Weapons (NPT) was adopted in 1970. IAEA has strengthened its safeguards system and increased efforts to combat nuclear terrorism by helping countries secure nuclear and radioactive material and facilities. This report (1) identifies the steps IAEA has taken to strengthen safeguards, (2) assesses the challenges in implementing strengthened safeguards, (3) identifies U.S. financial support for safeguards, and (4) describes IAEA's efforts to help secure nuclear material and facilities."

A letter report issued by the Government Accountability Office with an abstract that begins "The Department of Defense (DOD) invests billions of dollars annually to modernize its business systems, which have been on GAO's high-risk list since 1995. DOD is in the process of implementing nine enterprise resource planning (ERP) efforts which perform business-related tasks such as general ledger accounting and supply chain management. These efforts are essential to transforming DOD's business operations. GAO was asked to (1) provide the status of the ERPs as of December 31, 2009; (2) determine whether selected ERPs followed schedule and cost best practices; and (3) determine if DOD has defined the performance measures to assess whether the ERPs will meet their intended business capabilities. To accomplish these objectives, GAO reviewed data on the status of each ERP from the program management officers and interviewed the DOD and military departments' chief management officers."

A letter report issued by the Government Accountability Office with an abstract that begins "The Defense Logistics Agency's (DLA) mission is, in part, to provide food, fuel, medical supplies, clothing, spare parts for weapon systems, and construction materials to sustain military operations and combat readiness. To protect the information and information systems that support its mission, it is critical that DLA implement an effective information security program. GAO was asked to review the efficiency and effectiveness of DLA's operations, including its information security program. In response, GAO determined whether the agency had implemented an effective information security program."

A letter report issued by the Government Accountability Office with an abstract that begins "The Congress asked GAO to review operational and programmatic aspects of the Census Bureau's ACS that will affect the reliability of small geographic area data. The ACS will be a mail survey of about 3 million households annually, whose results will be cumulated over 5 years to produce estimates that will replace information previously provided by the Decennial Census long form. In addition, annual data will be published for geographic areas with 65,000+ populations and as 3-year averages for areas with populations of 20,000 to 65,000. Annual data will be published beginning in 2006 with data for 2005. The 5-year averages for 2008-12 will provide data for small geographic areas."

A letter report issued by the Government Accountability Office with an abstract that begins "DOD plays a support role in managing Chemical, Biological, Radiological, Nuclear, and High-Yield Explosives (CBRNE) incidents, including providing capabilities to save lives, alleviate hardship or suffering, and minimize property damage. This report addresses the extent to which (1) DOD's CBRNE consequence management plans and capabilities are integrated with other federal plans; (2) DOD has planned for and structured its force to provide CBRNE consequence management assistance; (3) DOD's CBRNE Consequence Management Response Forces (CCMRF) are prepared for their mission; and (4) DOD has CCMRF funding plans that are linked to requirements for specialized CBRNE capabilities. GAO reviewed DOD's plans for CBRNE consequence management and documents from the Department of Homeland Security (DHS) and FEMA. GAO also met with officials from the Assistant Secretary of Defense for Homeland Defense, U.S Northern Command, the military services, the National Guard Bureau, and some CCMRF units."

A letter report issued by the General Accounting Office with an abstract that begins "In 1986, the United States entered into a Compact of Free Association (Compact) that provided about $2.1 billion in U.S. assistance from 1987 through 2003 to the Pacific Island nations of the Federated States of Micronesia (FSM) and the Republic of the Marshall Islands (RMI). GAO has issued a number of reports raising concerns about the effectiveness of this assistance. GAO was asked to review possible FSM and RMI misuse of Compact funds. We reviewed single audits for 1996 through 2000 and this report summarizes the audit results."