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AFM CHARACTERIZATION OF LASER INDUCED DAMAGE ON CDZNTE CRYSTAL SURFACES (open access)

AFM CHARACTERIZATION OF LASER INDUCED DAMAGE ON CDZNTE CRYSTAL SURFACES

Semi-conducting CdZnTe (or CZT) crystals can be used in a variety of detector-type applications. CZT shows great promise for use as a gamma radiation spectrometer. However, its performance is adversely affected by point defects, structural and compositional heterogeneities within the crystals, such as twinning, pipes, grain boundaries (polycrystallinity), secondary phases and in some cases, damage caused by external forces. One example is damage that occurs during characterization of the surface by a laser during Raman spectroscopy. Even minimal laser power can cause Te enriched areas on the surface to appear. The Raman spectra resulting from measurements at moderate intensity laser power show large increases in peak intensity that is attributed to Te. Atomic Force Microscopy (AFM) was used to characterize the extent of damage to the CZT crystal surface following exposure to the Raman laser. AFM data reveal localized surface damage in the areas exposed to the Raman laser beam. The degree of surface damage to the crystal is dependent on the laser power, with the most observable damage occurring at high laser power. Moreover, intensity increases in the Te peaks of the Raman spectra are observed even at low laser power with little to no visible damage observed by …
Date: June 10, 2008
Creator: Hawkins, S; Lucile Teague, L; Martine Duff, M & Eliel Villa-Aleman, E
Object Type: Article
System: The UNT Digital Library
The Altus Times (Altus, Okla.), Vol. 109, No. 320, Ed. 1 Tuesday, June 10, 2008 (open access)

The Altus Times (Altus, Okla.), Vol. 109, No. 320, Ed. 1 Tuesday, June 10, 2008

Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date: June 10, 2008
Creator: Bush, Michael
Object Type: Newspaper
System: The Gateway to Oklahoma History
Ballast Water Management to Combat Invasive Species (open access)

Ballast Water Management to Combat Invasive Species

This report provides background on various approaches to ballast water management and reviews current ballast water management laws and programs.
Date: June 10, 2008
Creator: Buck, Eugene H.
Object Type: Report
System: The UNT Digital Library
Ballast Water Management to Combat Invasive Species (open access)

Ballast Water Management to Combat Invasive Species

This report provides background on various approaches to ballast water management and reviews current ballast water management laws and programs.
Date: June 10, 2008
Creator: Buck, Eugene H.
Object Type: Report
System: The UNT Digital Library
The Baytown Sun (Baytown, Tex.), Vol. 88, No. 161, Ed. 1 Tuesday, June 10, 2008 (open access)

The Baytown Sun (Baytown, Tex.), Vol. 88, No. 161, Ed. 1 Tuesday, June 10, 2008

Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date: June 10, 2008
Creator: Clements, Clifford E.
Object Type: Newspaper
System: The Portal to Texas History
The Boerne Star (Boerne, Tex.), Vol. 102, No. 47, Ed. 1 Tuesday, June 10, 2008 (open access)

The Boerne Star (Boerne, Tex.), Vol. 102, No. 47, Ed. 1 Tuesday, June 10, 2008

Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date: June 10, 2008
Creator: Cartwright, Brian
Object Type: Newspaper
System: The Portal to Texas History
Burma: Economic Sanctions (open access)

Burma: Economic Sanctions

On October 19, 2007, President George W. Bush issued Executive Order 13449. This followed a September 25, 2007 statement by President Bush that sanctions against Burma, which have been in place since 1997, would be tightened to specifically target leading Burmese officials and impose additional financial and travel sanctions. This report provides background information on existing economic sanctions against Burma and possible options to expand sanctions.
Date: June 10, 2008
Creator: Niksch, Larry A. & Weiss, Martin A.
Object Type: Report
System: The UNT Digital Library
Carbon Capture and Sequestration (CCS) (open access)

Carbon Capture and Sequestration (CCS)

This report discusses carbon capture and sequestration (CCS), but not other types of carbon sequestration activities whereby CO2 is removed from the atmosphere and stored in vegetation, soils, or oceans.
Date: June 10, 2008
Creator: Folger, Peter
Object Type: Report
System: The UNT Digital Library
Compact of Free Association: Micronesia Faces Challenges to Achieving Compact Goals (open access)

Compact of Free Association: Micronesia Faces Challenges to Achieving Compact Goals

Testimony issued by the Government Accountability Office with an abstract that begins "From 1987 through 2003, the Federated States of Micronesia (FSM) received more than $1.5 billion in economic assistance under the original Compact of Free Association with the United States. In 2003, the U.S. government approved an amended compact with the FSM that provides an additional $2.3 billion from 2004 through 2023. The Department of the Interior's Office of Insular Affairs (OIA) is responsible for administering and monitoring this assistance. The amended compact identifies the additional 20 years of grant assistance as intended to assist the FSM in its efforts to promote the economic advancement and budgetary self-reliance of its people. The assistance is provided in the form of annually decreasing grants that prioritize health and education, paired with annually increasing contributions to a trust fund intended as a source of revenue for the country after the grants end in 2023. The amended compact also contains several new funding and accountability provisions intended to strengthen reporting and bilateral interaction. Among these provisions is a requirement for the establishment of a joint economic management committee and a trust fund committee to, respectively, among other duties, review the FSM's progress toward …
Date: June 10, 2008
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Compact of Free Association: Palau's Use of and Accountability for U.S. Assistance and Prospects for Economic Self-Sufficiency (open access)

Compact of Free Association: Palau's Use of and Accountability for U.S. Assistance and Prospects for Economic Self-Sufficiency

A letter report issued by the Government Accountability Office with an abstract that begins "The Compact of Free Association between the Republic of Palau and the United States entered into force on October 1, 1994, with the U.S. interest of promoting Palau's self-sufficiency and economic advancement. The compact and its related subsidiary agreements provide for a 15-year term of economic assistance. In fiscal year 2009, the two governments must review the terms of the compact and related agreements and agree on any modifications. The Department of the Interior (DOI) has primary responsibility for oversight of Palau's use of compact funds. GAO was requested to report on (1) the provision of compact and other U.S. assistance to Palau in fiscal years 1995-2009; (2) Palau's and U.S. agencies' efforts to provide accountability over Palau's use of federal funds in 1995-2006; and (3) Palau's prospects for achieving economic self-sufficiency. GAO reviewed Palau's compact annual reports, financial statements and internal control reports for fiscal years 1995-2006, as well as other compact-related documentation. GAO interviewed officials from the U.S. and Palau governments and conducted fieldwork in Palau."
Date: June 10, 2008
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
Constitutional Issues Relating to Proposals for Foreclosure Moratorium Legislation That Affects Existing Mortgages (open access)

Constitutional Issues Relating to Proposals for Foreclosure Moratorium Legislation That Affects Existing Mortgages

This report begins with an overview of Congress's authority pursuant to the Commerce and Bankruptcy Clauses to pass laws pertaining to foreclosures, and a review of Contract Clause, Substantive Due Process, and Takings Clause jurisprudence.
Date: June 10, 2008
Creator: Carpenter, David H.
Object Type: Report
System: The UNT Digital Library

Controlled Hydrogen Fleet and Infrastructure Analysis

This presentation by Keith Wipke at the 2008 DOE Hydrogen Program Annual Merit Review Meeting provides information about NREL's Controlled Hydrogen Fleet and Infrastructure Analysis Project.
Date: June 10, 2008
Creator: Wipke, K.; Sprik, S. & Kurtz, J.
Object Type: Presentation
System: The UNT Digital Library
The Davis-Bacon Act: Issues and Legislation During the 110th Congress (open access)

The Davis-Bacon Act: Issues and Legislation During the 110th Congress

None
Date: June 10, 2008
Creator: Whittaker, William G.
Object Type: Report
System: The UNT Digital Library
Department of Justice (DOJ) Appropriations for FY2008 and FY2009 (open access)

Department of Justice (DOJ) Appropriations for FY2008 and FY2009

This report provides a discussion of funding for the U.S. Department of Justice (DOJ) for fiscal years 2008 and 2009, including background information, a breakdown of funding from FY2008 regular and supplemental funding, and budget requests for FY2009.
Date: June 10, 2008
Creator: Krouse, William J.; Franco, Celinda & James, Nathan
Object Type: Report
System: The UNT Digital Library
Digital Television Transition: Broadcasters' Transition Status, Low-Power Station Issues, and Information on Consumer Awareness of the DTV Transition (open access)

Digital Television Transition: Broadcasters' Transition Status, Low-Power Station Issues, and Information on Consumer Awareness of the DTV Transition

Testimony issued by the Government Accountability Office with an abstract that begins "The Digital Television (DTV) Transition and Public Safety Act of 2005, requires all full-power television station in the United States to cease analog broadcasting by February 17, 2009. Low-power stations are not required to cease analog transmissions and most will continue broadcasting in analog. Federal law also requires the National Telecommunications and Information Administration (NTIA) to subsidize consumers' purchases of digital-to-analog converter boxes. After the transition, households with analog sets that rely on over-the-air broadcasts must take action or they will lose television service, but some households might not be aware of this potential disruption. This testimony provides information on (1) technical and coordination issues facing full-power broadcast stations as they transition to digital, (2) issues pertaining to low-power broadcasting and how they affect consumers, and (3) the extent to which American households are aware of the DTV transition and likely to utilize the converter box subsidy program. GAO interviewed officials with the Federal Communications Commission (FCC) and NTIA and met with a wide variety of industry participants and other stakeholders. GAO conducted a Web-based survey of broadcasters to determine their status in transitioning to digital and issues …
Date: June 10, 2008
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library

Doctoral Recital: 2008-06-10 - Hsing-Fang Liu, clarinet

Recital presented at the UNT College of Music Recital Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree.
Date: June 10, 2008
Creator: Liu, Hsing-Fang
Object Type: Sound
System: The UNT Digital Library
DYNAMIC NON LINEAR IMPACT ANALYSIS OF FUEL CASK CONTAINMENT VESSELS (open access)

DYNAMIC NON LINEAR IMPACT ANALYSIS OF FUEL CASK CONTAINMENT VESSELS

Large fuel casks present challenges when evaluating their performance in the accident sequence specified in 10CFR 71. Testing is often limited because of cost, difficulty in preparing test units and the limited availability of facilities which can carry out such tests. In the past, many casks were evaluated without testing using simplified analytical methods. This paper details the use of dynamic non-linear analysis of large fuel casks using advanced computational techniques. Results from the dynamic analysis of two casks, the T-3 Spent Fuel Cask and the Hanford Un-irradiated Fuel Package are examined in detail. These analyses are used to fully evaluate containment vessel stresses and strains resulting from complex loads experienced by cask components during impacts. Importantly, these advanced analytical analyses are capable of examining stresses in key regions of the cask including the cask closure. This paper compares these advanced analytical results with the results of simplified cask analyses like those detailed in NUREG 3966.
Date: June 10, 2008
Creator: Leduc, D
Object Type: Article
System: The UNT Digital Library
Employment Verification: Challenges Exist in Implementing a Mandatory Electronic Employment Verification System (open access)

Employment Verification: Challenges Exist in Implementing a Mandatory Electronic Employment Verification System

A statement of record issued by the Government Accountability Office with an abstract that begins "In 1996, the former U.S. Immigration and Naturalization Service, now within the Department of Homeland Security (DHS), and the Social Security Administration (SSA) began operating a voluntary pilot program, recently named the E-Verify program, to provide participating employers with a means for electronically verifying employees' work eligibility. Legislation has been introduced in Congress to require all employers to electronically verify the work authorization status of their employees. In this statement GAO provides observations on the E-Verify system's capacity and costs, options for reducing delays and improving efficiency in the verification process, ability to detect fraudulent documents and identity theft, and vulnerability to employer fraud and misuse. This statement is based on GAO's products issued from August 2005 through June 2007 and updated information obtained from DHS and SSA in April 2008. We analyzed data on employer use, E-Verify guidance, and other reports on the employment verification process, as well as legislative proposals and regulations."
Date: June 10, 2008
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Energy Tax Policy: History and Current Issues (open access)

Energy Tax Policy: History and Current Issues

This report discusses the history, current posture, and outlook for the federal energy tax policy. It also discusses current energy tax proposals and major energy tax provisions enacted in the 109th Congress.
Date: June 10, 2008
Creator: Lazzari, Salvatore
Object Type: Report
System: The UNT Digital Library
ENHANCEMENT OF MATERIAL CONTROL AND ACCOUNTING PROGRAMS THROUGH THE CONDUCT OF GAP ANALYSIS AND THE DEVELOPMENT AND IMPLEMENTATION OF A COMPREHENSIVE MCA PROGRAM PLAN (open access)

ENHANCEMENT OF MATERIAL CONTROL AND ACCOUNTING PROGRAMS THROUGH THE CONDUCT OF GAP ANALYSIS AND THE DEVELOPMENT AND IMPLEMENTATION OF A COMPREHENSIVE MCA PROGRAM PLAN

An effective safeguards program for nuclear materials is dependent on the integration of activities in the traditional safeguards elements: physical protection, protective force, and material control and accounting (MC&A). The design and integration of these traditional safeguards elements must be based on a technical analysis performed in characterizing the vulnerabilities and related risks of the facility against a designed-basis threat. Each of these elements requires a near seamless integration with each other, as well as within a site's operations organization. One of the key objectives of an effective nuclear Material Control and Accountability (MC&A) program is to address the threat posed by an active or passive 'insider' who, acting alone or in collusion, could attempt protracted or abrupt diversion or theft of special nuclear material (SNM). The function of material accountancy is to detect the loss or unauthorized removal of special nuclear material from the plant or facility in a timely manner. Detection is accomplished by means of measurements and transfer records of material movements and periodic inventories to verify that all material is accounted for. The function of material control is to assure the integrity of the nuclear material and the accountancy data. This paper focuses on the development …
Date: June 10, 2008
Creator: Hasty, T
Object Type: Article
System: The UNT Digital Library
Environmental Services Markets in the 2008 Farm Bill (open access)

Environmental Services Markets in the 2008 Farm Bill

This report gives an overview of issues involved in the provisions of the 2008 farm bill (P.L. 110-234, the Food, Conservation, and Energy Act). It includes a brief overview describing environmental services markets, benefits and barriers, recent Congressional action related to the topics, and possible considerations.
Date: June 10, 2008
Creator: Johnson, Renée
Object Type: Report
System: The UNT Digital Library
Environmental Services Markets in the 2008 Farm Bill (open access)

Environmental Services Markets in the 2008 Farm Bill

This report discusses environmental services markets in relation to the farm bill (P.L. 110-234, the Food, Conservation, and Energy Act of 2008), which covers a range of farm and forestry sector services associated with improved water and air quality, increased carbon storage, and habitat protection. It gives an overview of environmental services markets as well as benefits and barriers, how they are affected by Congressional action, and possible considerations.
Date: June 10, 2008
Creator: Johnson, Renée
Object Type: Report
System: The UNT Digital Library
Examination of Uranium(VI) Leaching During Ligand Promoted Dissolution of Waste Tank Sludge Surrogates (open access)

Examination of Uranium(VI) Leaching During Ligand Promoted Dissolution of Waste Tank Sludge Surrogates

The dissolution of synthetic boehmite (?-AlOOH) by 1-hydroxyethane-1,1-diphosphonic acid (HEDPA) was examined in a series of batch adsorption/dissolution experiments. Additionally, the leaching behavior of {sup 233}U(VI) from boehmite was examined as a function of pH and HEDPA concentration. The results are discussed in terms of sludge washing procedures that may be utilized during underground tank waste remediation. In the pH range 4 to 10, complexation of Al(III) by HEDPA significantly enhanced dissolution of boehmite. This phenomenon was especially pronounced in the neutral pH region where the solubility of aluminum, in the absence of complexants, is limited by the formation of sparsely soluble aluminum hydroxides. At pH higher than 10, dissolution of synthetic boehmite was inhibited by HEDPA, likely due to sorption of Al(III):HEDPA complexes. Addition of HEDPA to equilibrated U(VI)-synthetic boehmite suspensions yielded an increase in the aqueous phase uranium concentration. Partitioning of uranium between the solid and aqueous phase is described in terms of U(VI):HEDPA speciation and dissolution of the boehmite solid phase.
Date: June 10, 2008
Creator: Powell, Brian; Powell, Brian A.; Rao, Linfeng & Nash, Kenneth. L.
Object Type: Article
System: The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Tuesday, June 10, 2008 (open access)

The Express-Star (Chickasha, Okla.), Ed. 1 Tuesday, June 10, 2008

Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date: June 10, 2008
Creator: unknown
Object Type: Newspaper
System: The Gateway to Oklahoma History