Analysis of oxygen on and in beryllium using 2 MeV helium ions (open access)

Analysis of oxygen on and in beryllium using 2 MeV helium ions

Analysis of oxygen on beryllium can be routinely performed using helium-ion backscattering (RBS). However, determination of the bulk oxygen concentration by this technique is limited to about 350 atomic parts per million (appM). We have performed simultaneous RBS and particle-induced x-ray emission (PIXE) measurements to improve the detection limit for bulk oxygen. The RBS measurements allowed determination of the surface oxygen before and after in-situ sputter cleaning by argon ions in an ultra-high-vacuum system. PIXE measurements of specimens with surfaces maintained clean by sputtering permitted assessment of the concentration of oxygen in the bulk. For our geometry and detector sensitivities, 90% of the oxygen x-ray signal originated in the first 2.1 ..mu..m of the beryllium and a detection limit of 10 appM was found. 12 refs., 3 figs.
Date: October 2, 1986
Creator: Musket, R.G.
Object Type: Article
System: The UNT Digital Library
Thermal Regimes of Major Volcanic Centers: Magnetotelluric Constraints (open access)

Thermal Regimes of Major Volcanic Centers: Magnetotelluric Constraints

The interpretation of geophysical/electromagnetic field data has been used to study dynamical processes in the crust beneath three of the major tectono-volcanic features in North America: the Long Valley/Mono Craters Volcanic Complex in eastern California, the Cascades Volcanic Belt in Oregon, and the Rio Grande Rift in the area of Socorro, New Mexico. Primary accomplishments have been in the area of creating and implementing a variety of 2-D generalized inverse computer codes, and the application of these codes to fields studies on the basin structures and he deep thermal regimes of the above areas. In order to more fully explore the space of allowable models (i.e. those inverse solutions that fit the data equally well), several distinctly different approaches to the 2-D inverse problem have been developed: (1) an overdetermined block inversion; (2) an overdetermined spline inverstion; (3) a generalized underdetermined total inverse which allows one to tradeoff certain attributes of their model, such as minimum structure (flat models), roughness (smooth models), or length (small models). Moreover, we are exploring various approaches for evaluating the resolution model parameters for the above algorithms. 33 refs.
Date: October 2, 1989
Creator: Hermance, J. F.
Object Type: Report
System: The UNT Digital Library
International petroleum statistics report, September 1991 (open access)

International petroleum statistics report, September 1991

The International Petroleum Statistics Report is a monthly publication that provides current international oil data. This report is published for the use of members of Congress, federal agencies, state agencies, industry, and the general public. Publication of this report is in keeping with responsibilities given the Energy Information Administration in Public Law 95-91 (Section 205(a)(2)). The International Petroleum Statistics Report presents data on international oil production, consumption, imports, exports, and stocks. The report has three sections. Section 1 contains time series on world oil production, and on oil consumption and stocks in the Organization for Economic Cooperation and Development (DECD). This section contains annual data beginning in 1973, and monthly data for the most recent two years. Section 2 presents an oil supply/consumption balance for the market economies (i.e. non-communist countries). This balance is presented in quarterly intervals for the most recent two years. Section 3 presents data on oil imports by DECD countries. This section contains annual data beginning in 1982, and quarterly data for the most recent two years. 41 tabs.
Date: October 2, 1991
Creator: unknown
Object Type: Report
System: The UNT Digital Library
The Peace Corps: Current Issues (open access)

The Peace Corps: Current Issues

Report regarding the President's annual funding request for the Peace Corps, efforts to reauthorize the Peace Corps, and related issues. Current issues include the extent to which there is available funding for Peace Corps expansion, whether the Peace Corps has the institutional capacity to expand, and whether volunteers are able to function in a safe and secure environment.
Date: October 2, 2012
Creator: Tarnoff, Curt
Object Type: Report
System: The UNT Digital Library
Automatic Continuing Resolutions: Background and Overview of Recent Proposals (open access)

Automatic Continuing Resolutions: Background and Overview of Recent Proposals

This report begins by providing background on the historic frequency of federal funding gaps. Next, four major features of automatic continuing resolution(ACR) proposals since the 1980s -- time frame, funding level, activities, and duration -- are explained. This is followed by a summary of the major arguments for and against the enactment of an ACR. Finally, the last three sections of the report review congressional action that has taken place on ACR proposals, describe ACR proposals that have been introduced but not enacted during the 112th and 113th Congresses, and provide brief analysis of H.R. 3210.
Date: October 2, 2013
Creator: Tollestrup, Jessica
Object Type: Report
System: The UNT Digital Library
Elections: Further Testing Could Provide Increased but Not Absolute Assurance That Voting Systems Did Not Cause Undervotes in Florida's 13th Congressional District (open access)

Elections: Further Testing Could Provide Increased but Not Absolute Assurance That Voting Systems Did Not Cause Undervotes in Florida's 13th Congressional District

A statement of record issued by the Government Accountability Office with an abstract that begins "In November 2006, about 18,000 undervotes were reported in Sarasota County in the race for Florida's 13th Congressional District (FL-13). After the contesting of the election results in the House of Representatives, the task force unanimously voted to seek GAO's assistance in determining whether the voting systems contributed to the large undervote in Sarasota County. GAO agreed with the task force on an engagement plan, including the following review objectives: (1) What voting systems were used in Sarasota County and what processes governed their use? (2) What was the scope of the undervote in Sarasota County in the general election? (3) What tests were conducted on the voting systems in Sarasota County prior to the general election and what were the results of those tests? (4) Considering the voting systems tests conducted after the general election, are additional tests needed to determine whether the voting systems contributed to the undervote? To conduct its work, GAO met with officials from the State of Florida, Sarasota County, and Election Systems and Software (ES&S)--the voting systems manufacturer--and reviewed voting systems test documentation. GAO analyzed election data to characterize …
Date: October 2, 2007
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Cardiograph, portable. (open access)

Cardiograph, portable.

A guide to the operation and maintenance of the portable electrocardiograph.
Date: October 2, 1944
Creator: United States. War Department.
Object Type: Book
System: The UNT Digital Library
Indian Issues: Spokane Tribe's Additional Compensation Claim for the Grand Coulee Dam (open access)

Indian Issues: Spokane Tribe's Additional Compensation Claim for the Grand Coulee Dam

A statement of record issued by the General Accounting Office with an abstract that begins "The Grand Coulee Dam was constructed on the Columbia River in northeastern Washington State from 1933 to 1942. The reservoir behind the dam covers land on the Colville Reservation along the Columbia River and land on the adjacent Spokane Reservation along both the Columbia and Spokane rivers. Under a 1940 act, the federal government paid $63,000 and $4,700 to the Colville and Spokane tribes, respectively, for the land used for the dam and reservoir. Subsequently, the Colville tribes pursued additional claims for their lost fisheries and for "water power values" and in 1994 were awarded a lump sum payment of $53 million and, beginning in 1996, annual payments that have ranged between $14 million to $21 million. The Spokane tribe is currently pursuing similar claims. S. 1438, introduced in July 2003, is a proposed legislative settlement for the Spokane tribe's claims. While settlement proposals introduced in the 106th and 107th Congresses directed the settlement costs to be split between Bonneville and the Treasury, S. 1438 provides that the settlement be paid entirely from the Treasury. This statement for the record addresses the (1) impact of …
Date: October 2, 2003
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
Foreign Assistance: U.S. Russia Fund Is Following Its Investment Selection Process and Criteria (open access)

Foreign Assistance: U.S. Russia Fund Is Following Its Investment Selection Process and Criteria

A letter report issued by the General Accounting Office with an abstract that begins "This report summarizes GAO's findings on the United States Russia Fund and its investment selection process and criteria. The United States established enterprise funds to support private sector development in Central and Eastern Europe and the former Soviet Union as they move from centrally planned to market-oriented economies. Enterprise funds are private, nonprofit U.S. corporations that are supposed to make loans to, or invest in, small, medium, and large businesses in which other financial institutions are reluctant to invest. The Fund is authorized to receive $440 million through the Agency for International Development. As of March 2000, the Fund had invested $114.4 million in 30 projects through its direct investment program which provides loans and equity capital to businesses in Russia. GAO found that the Fund followed its review process and criteria for selecting direct investments."
Date: October 2, 2000
Creator: United States. General Accounting Office.
Object Type: Report
System: The UNT Digital Library
Commercial Aviation: Financial Condition and Industry Responses Affect Competition (open access)

Commercial Aviation: Financial Condition and Industry Responses Affect Competition

Testimony issued by the General Accounting Office with an abstract that begins "This testimony discusses the economic state of the airline industry. Many, but not all, major U.S. passenger airlines are experiencing their second consecutive year of record financial losses. In 2001, the U.S. commercial passenger airline industry reported losses in excess of $6 billion. For 2002, some Wall Street analysts recently projected that U.S. airline industry losses will approach $7 billion, and noted that the prospects for recovery during 2003 are diminishing. Carriers have taken many actions to lower their costs and restructure their operations. Since September 2001, carriers have furloughed 100,000 staff, renegotiated labor contracts, and streamlined their fleets by retiring older, costlier aircraft. Carriers have reduced capacity by operating fewer flights or smaller aircraft. In some cases, carriers eliminated all service to communities. As the aviation industry continues its attempts to recover, Congress will be confronted with a need for increased oversight of a number of public policy issues. First, airlines' reactions to financial pressures will affect the domestic industry's competitive landscape. Second, airlines' reductions in service will likely place additional pressure on federal programs supporting air service to small communities, where travel options are already limited. …
Date: October 2, 2002
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
Foreign Assistance: USAID Compliance With Family Planning Restrictions (open access)

Foreign Assistance: USAID Compliance With Family Planning Restrictions

A letter report issued by the General Accounting Office with an abstract that begins "The United States has provided international family planning assistance through the Agency for International Development (AID) since the mid-1960s. U.S. law prohibits the use of international family planning funds for abortions and requires that all family planning programs supported by AID be voluntary. This report discusses: (1) how much family planning assistance AID provided in fiscal years 1996-1999 and plans to provide in fiscal year 2000, and (2) what procedures have been established to ensure that funds are not being used for prohibited activities. GAO found that AID provided $432 million in assistance in fiscal year 1996 and $385 million in each of fiscal years 1997-1999. AID has established multiple procedures to ensure that family planning funds are not used for prohibited activities, including specifying the restrictions in grants, contracts, and cooperative agreements."
Date: October 2, 2000
Creator: United States. General Accounting Office.
Object Type: Report
System: The UNT Digital Library
Federal Emergency Management Agency: Ongoing Challenges Facing the National Flood Insurance Program (open access)

Federal Emergency Management Agency: Ongoing Challenges Facing the National Flood Insurance Program

Testimony issued by the Government Accountability Office with an abstract that begins "The National Flood Insurance Program (NFIP), established in 1968, provides property owners with some insurance coverage for flood damage. The Federal Emergency Management Agency (FEMA) within the Department of Homeland Security is responsible for managing the NFIP. Given the challenges facing the NFIP and the need for legislative reform to ensure the financial stability and ongoing viability of this program, GAO placed the NFIP on its high-risk list in March 2006. This testimony updates past work and provides information about ongoing GAO work on issues including (1) NFIP's financial structure, (2) the extent of compliance with mandatory requirements, (3) the status of map modernization efforts, and (4) FEMA's oversight of the NFIP. Building on our previous and ongoing work on the NFIP, GAO collected data from FEMA to update efforts, including information about claims, policies, repetitive loss properties, and mitigation efforts."
Date: October 2, 2007
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Electronic Government: Opportunities and Challenges Facing the FirstGov Web Gateway (open access)

Electronic Government: Opportunities and Challenges Facing the FirstGov Web Gateway

Testimony issued by the General Accounting Office with an abstract that begins "This testimony discusses what can be accomplished with FirstGov.gov and identifies challenges that should be addressed as it continues to be developed and refined. Under FirstGov, an important and previously unavailable capability--searching the entire government's web pages--was rapidly and successfully put into place. The FirstGov Board of Directors needs to address the following four issues: (1) improving site security, (2) assessing and acting upon information in the Fed-Search database that might facilitate malicious activity, (3) addressing issues regarding private sector sponsorship, and (4) developing plans for the future. An overall management plan for FirstGov.gov would be a useful vehicle for setting expectations about what general functions are likely to be achievable for FirstGov in the near term, how the site will be managed on an ongoing basis, and how progress toward the larger goals set forth in the President's December 1999 memorandum will be measured."
Date: October 2, 2000
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
Contract Management: Restructuring GSA's Federal Supply Service and Federal Technology Service (open access)

Contract Management: Restructuring GSA's Federal Supply Service and Federal Technology Service

Testimony issued by the General Accounting Office with an abstract that begins "The General Services Administration's (GSA) Federal Supply Service (FSS) and Federal Technology Service (FTS) play an important role in assisting agencies procure a wide range of products and services. Over the past several years, FSS and FTS purchases have significantly increased, with IT products and services being the primary source of this growth. In April 2002, we identified overlap in FSS' and FTS' IT procurement programs. A management consultant similarly found overlaps in FTS' and FSS' IT sales and marketing functions and contract offerings. To enhance FSS and FTS operational efficiency and effectiveness--in both its IT and non-IT business lines--GSA has undertaken a performance improvement initiative. This testimony focuses on GSA's actions to implement its initiative. It also discusses the importance of enhancing GSA's ability to help agencies strategically purchase products and services."
Date: October 2, 2003
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
Review of the state of the art in personnel neutron monitoring with solid state detectors (open access)

Review of the state of the art in personnel neutron monitoring with solid state detectors

Albedo systems are the mainstay at many facilities and continue to be refined. Advanced electrochemical etching techniques for CR-39 now yield a dose equivalent response that is nearly constant from 0.1 to 4.0 MeV. Recent studies include use of converters to enhance CR-39 response at both low and high energies. Methods have been suggested for use of CR-39, either alone or in conjunction with albedo and other detectors to provide spectral information as a step to more accurate dosimetry. Limitations in the use of CR-39 primarily center on the lack of consistent, high-quality, dosimetry-grade material, significant angular dependence, and poor dose equivalent response at both low and high energies. Work continues on silicon diodes, with some new designs. The most attractive new dosimetry technique is the bubble-damage or superheated drop detector. Metal-on-silicon (MOS) microelectronics present exciting possibilities for the future. 25 refs., 6 figs.
Date: October 2, 1987
Creator: Griffith, R.V.
Object Type: Article
System: The UNT Digital Library
Synthesis of a naphthalene-hydroxynaphthalene polymer model compound (open access)

Synthesis of a naphthalene-hydroxynaphthalene polymer model compound

The objective of this project was the synthesis of one pound of a new naphthalene-hydroxynaphthalene polymer model compound for use in coal combustion studies. Since this compound was an unreported compound, this effort also required the development of a synthetic route to this compound (including routes to the unique and unreported intermediates leading to its synthesis).
Date: October 2, 1991
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Prototype solar heating and combined heating and cooling systems. Quarterly report No. 9 (open access)

Prototype solar heating and combined heating and cooling systems. Quarterly report No. 9

Eight prototype solar heating and combined heating and cooling systems are under development. This effort includes development, manufacture, test, installation, maintenance, problem resolution, and performance evaluation.
Date: October 2, 1978
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Affordable Care Act (ACA) and the Appropriations Process: FAQs Regarding Potential Legislative Changes and Effects of a Government Shutdown (open access)

Affordable Care Act (ACA) and the Appropriations Process: FAQs Regarding Potential Legislative Changes and Effects of a Government Shutdown

This report provides background information on the Affordable Care Act (ACA). It discusses the ACA and the annual appropriations process and the potential impact of a shutdown on ACA implementation.
Date: October 2, 2013
Creator: Redhead, C. S.; Tollestrup, Jessica; Liu, Edward C. & Brass, Clinton T.
Object Type: Report
System: The UNT Digital Library
The Temporary Assistance for Needy Families (TANF) Block Grant: Responses to Frequently Asked Questions (open access)

The Temporary Assistance for Needy Families (TANF) Block Grant: Responses to Frequently Asked Questions

This report provides responses to frequently asked questions about the Temporary Assistance for Needy Families (TANF) block grant.
Date: October 2, 2013
Creator: Falk, Gene
Object Type: Report
System: The UNT Digital Library
2003 Brookhaven National Laboratory Annual Illness and Injury Surveillance Report, Revised September 2007 (open access)

2003 Brookhaven National Laboratory Annual Illness and Injury Surveillance Report, Revised September 2007

Annual Illness and Injury Surveillance Program report for 2003 for Brookhaven National Lab. The U.S. Department of Energy’s (DOE) commitment to assuring the health and safety of its workers includes the conduct of epidemiologic surveillance activities that provide an early warning system for health problems among workers. The IISP monitors illnesses and health conditions that result in an absence of workdays, occupational injuries and illnesses, and disabilities and deaths among current workers.
Date: October 2, 2007
Creator: United States. Department of Energy. Office of Illness and Injury Prevention Programs.
Object Type: Report
System: The UNT Digital Library
Elastic and transport properties in polycrystals of crackedgrains: Cross-property relations and microstructure (open access)

Elastic and transport properties in polycrystals of crackedgrains: Cross-property relations and microstructure

Some arguments of Bristow (1960) concerning the effects of cracks on elastic and transport (i.e., electrical or thermal conduction) properties of cold-worked metals are reexamined. The discussion is posed in terms of a modern understanding of bounds and estimates for physical properties of polycrystals--in contrast to Bristow's approach using simple mixture theory. One type of specialized result emphasized here is the cross-property estimates and bounds that can be obtained using the methods presented. Our results ultimately agree with those of Bristow, i.e., confirming that microcracking is not likely to be the main cause of the observed elastic behavior of cold-worked metals. However, it also becomes clear that the mixture theory approach to the analysis is too simple and that crack-crack interactions are necessary for proper quantitative study of Bristow's problem.
Date: October 2, 2007
Creator: Berryman, J.G.
Object Type: Article
System: The UNT Digital Library
Effect of Background Emissivity on Gas Detection in Thermal Hyperspectral Imagery (open access)

Effect of Background Emissivity on Gas Detection in Thermal Hyperspectral Imagery

Detecting and identifying weak gaseous plumes using thermal imaging data is complicated by many factors. These include variability due to atmosphere, ground and plume temper- ature, and background clutter. This paper presents an analysis of one formulation of the physics-based radiance model, which describes at-sensor observed radiance. The background emissivity and plume/ground temperatures are isolated, and their effects on net chemical signal are described. This analysis shows that the plume’s physical state, emission or absorption, is directly dependent on the background emissivity. It then describes what conditions on the background emissivity have inhibiting effects on the net chemical signal. These claims are illustrated by analyzing synthetic hyperspectral imaging data with the Adaptive Matched Filter using four chemicals and three distinct background emissivities. Two chemicals (Carbontetrachloride and Tetraflourosilane) in the analysis had a very strong relationship with the background emissivities: they exhibited absorbance over a small range of wavenumbers and the background emissivities showed a consistent ordering at these wavenumbers. Analysis of simulated hyperspectral images containing these chemicals showed complete agreement with the analysis of the physics-based model that described when the background emissivities would have inhibiting effects on gas detection. The other chemicals considered (Ammonia and Tributylphosphate) exhibited very complex …
Date: October 2, 2008
Creator: Walsh, Stephen J.; Tardiff, Mark F.; Chilton, Lawrence K. & Metoyer, Candace N.
Object Type: Report
System: The UNT Digital Library
DiMES Studies of Temperature Dependence of Carbon Erosion and Re-Deposition in the DIII-D Divertor (open access)

DiMES Studies of Temperature Dependence of Carbon Erosion and Re-Deposition in the DIII-D Divertor

A strong effect of a moderately elevated surface temperature on net carbon deposition and deuterium co-deposition in the DIII-D divertor was observed under detached conditions. A DiMES sample with a gap 2 mm wide and 18 mm deep was exposed to lower-single-null (LSN) L-mode plasmas first at room temperature, and then at 200 C. At the elevated temperature, deuterium co-deposition in the gap was reduced by an order of magnitude. At the plasma-facing surface of the heated sample net carbon erosion was measured at a rate of 3 nm/s, whereas without heating net deposition is normally observed under detachment. In a related experiment three sets of molybdenum mirrors recessed 2 cm below the divertor floor were exposed to identical LSN ELMy H-mode discharges. The first set of mirrors exposed at ambient temperature exhibited net carbon deposition at a rate of up to 3.7 nm/s and suffered a significant drop in reflectivity. In contrast, two other mirror sets exposed at elevated temperatures between 90 C and 175 C exhibited virtually no carbon deposition.
Date: October 2, 2006
Creator: Rudakov, D.; Jacob, W.; Krieger, K.; Litnovsky, A.; Philipps, V.; West, W. et al.
Object Type: Article
System: The UNT Digital Library
Cleanup Verification Package for the 118-F-6 Burial Ground (open access)

Cleanup Verification Package for the 118-F-6 Burial Ground

This cleanup verification package documents completion of remedial action for the 118-F-6 Burial Ground located in the 100-FR-2 Operable Unit of the 100-F Area on the Hanford Site. The trenches received waste from the 100-F Experimental Animal Farm, including animal manure, animal carcasses, laboratory waste, plastic, cardboard, metal, and concrete debris as well as a railroad tank car.
Date: October 2, 2008
Creator: Sulloway, H. M.
Object Type: Report
System: The UNT Digital Library