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Exploring novel silicon-containing polymers---From preceramic polymers to conducting polymers with nonlinear optical properties

Description: 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(diph… more
Date: October 7, 1991
Creator: Pang, Yi.
Partner: UNT Libraries Government Documents Department
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Low-cost solar array project. Task I. Silicon material. Investigation of the hydrogenation of SiCl/sub 4/

Description: 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 … more
Date: October 7, 1980
Creator: Mui, J. Y. P. & Seyferth, D.
Partner: UNT Libraries Government Documents Department
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A miniature inexpensive, oxygen sensing element

Description: 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 m… more
Date: October 7, 1991
Creator: Arenz, R. W.
Partner: UNT Libraries Government Documents Department
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SPE water electrolysis technology development for large scale hydrogen production. Progress report No. 4, June 15, 1976--September 30, 1976

Description: 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 a… more
Date: October 7, 1976
Partner: UNT Libraries Government Documents Department
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Flight tests of thermal ice-prevention equipment in the XB-24F airplane

Description: 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.
Date: October 7, 1943
Creator: Neel, Carr B. & Jones, Alun R.
Partner: UNT Libraries Government Documents Department
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Comparison of the performance of a helicopter-type ram-jet engine under various centrifugal loadings

Description: 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 pr… more
Date: October 7, 1953
Creator: Radin, Edward J. & Carpenter, Paul J.
Partner: UNT Libraries Government Documents Department
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Government Shutdown: Operations of the Department of Defense During a Lapse in Appropriations

Description: 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.
Date: October 7, 2013
Creator: Towell, Pat & Belasco, Amy
Partner: UNT Libraries Government Documents Department
open access

Green Affordable Housing: HUD Has Made Progress in Promoting Green Building, but Expanding Efforts Could Help Reduce Energy Costs and Benefit Tenants

Description: 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 energ… more
Date: October 7, 2008
Creator: United States. Government Accountability Office.
Partner: UNT Libraries Government Documents Department
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TANF and Child Welfare Programs: Increased Data Sharing Could Improve Access to Benefits and Services

Description: 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. … more
Date: October 7, 2011
Creator: United States. Government Accountability Office.
Partner: UNT Libraries Government Documents Department
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Congressional Nominations to U.S. Service Academies: An Overview and Resources for Outreach and Management

Description: 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.
Date: October 7, 2010
Creator: Petersen, R. Eric
Partner: UNT Libraries Government Documents Department
open access

Climate Change Adaptation: Strategic Federal Planning Could Help Government Officials Make More Informed Decisions

Description: 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… more
Date: October 7, 2009
Creator: United States. Government Accountability Office.
Partner: UNT Libraries Government Documents Department
open access

Energy Markets: Refinery Outages Can Impact Petroleum Product Prices, but No Federal Requirements to Report Outages Exist

Description: 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 tren… more
Date: October 7, 2008
Creator: United States. Government Accountability Office.
Partner: UNT Libraries Government Documents Department
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Higher Education: Stronger Federal Oversight Needed to Enforce Ban on Incentive Payments to School Recruiters

Description: 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 … more
Date: October 7, 2010
Creator: United States. Government Accountability Office.
Partner: UNT Libraries Government Documents Department
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Nuclear Weapons: National Nuclear Security Administration Needs to Ensure Continued Availability of Tritium for the Weapons Stockpile

Description: 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 b… more
Date: October 7, 2010
Creator: United States. Government Accountability Office.
Partner: UNT Libraries Government Documents Department
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Aviation Safety: Certification and Approval Processes Are Generally Viewed as Working Well, but Better Evaluative Information Needed to Improve Efficiency

Description: 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… more
Date: October 7, 2010
Creator: United States. Government Accountability Office.
Partner: UNT Libraries Government Documents Department
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Aviation Security: DHS and TSA Have Researched, Developed, and Begun Deploying Passenger Checkpoint Screening Technologies, but Continue to Face Challenges

Description: 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) TS… more
Date: October 7, 2009
Creator: United States. Government Accountability Office.
Partner: UNT Libraries Government Documents Department
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Department of Defense: A Departmentwide Framework to Identify and Report Gaps in the Defense Supplier Base Is Needed

Description: 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 repo… more
Date: October 7, 2008
Creator: United States. Government Accountability Office.
Partner: UNT Libraries Government Documents Department
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Nuclear Nonproliferation: IAEA Has Strengthened Its Safeguards and Nuclear Security Programs, but Weaknesses Need to Be Addressed

Description: 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. T… more
Date: October 7, 2005
Creator: United States. Government Accountability Office.
Partner: UNT Libraries Government Documents Department
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DOD Business Transformation: Improved Management Oversight of Business System Modernization Efforts Needed

Description: 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 opera… more
Date: October 7, 2010
Creator: United States. Government Accountability Office.
Partner: UNT Libraries Government Documents Department
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Information Security: The Defense Logistics Agency Needs to Fully Implement Its Security Program

Description: 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 eff… more
Date: October 7, 2005
Creator: United States. Government Accountability Office.
Partner: UNT Libraries Government Documents Department
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American Community Survey: Key Unresolved Issues

Description: 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… more
Date: October 7, 2004
Creator: United States. Government Accountability Office.
Partner: UNT Libraries Government Documents Department
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Homeland Defense: Planning, Resourcing, and Training Issues Challenge DOD's Response to Domestic Chemical, Biological, Radiological, Nuclear, and High-Yield Explosive Incidents

Description: 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… more
Date: October 7, 2009
Creator: United States. Government Accountability Office.
Partner: UNT Libraries Government Documents Department
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Compact of Free Association: Single Audits Demonstrate Accountability Problems over Compact Funds

Description: 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… more
Date: October 7, 2003
Creator: United States. General Accounting Office.
Partner: UNT Libraries Government Documents Department
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