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483 Matching Results
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Estimating Contrast Transfer Function and Associated Parameters by Constrained Nonlinear Optimization
The three-dimensional reconstruction of macromolecules from two-dimensional single-particle electron images requires determination and correction of the contrast transfer function (CTF) and envelope function. A computational algorithm based on constrained non-linear optimization is developed to estimate the essential parameters in the CTF and envelope function model simultaneously and automatically. The application of this estimation method is demonstrated with focal series images of amorphous carbon film as well as images of ice-embedded icosahedral virus particles suspended across holes.
Date:
July 28, 2008
Creator:
Yang, Chao; Jiang, Wen; Chen, Dong-Hua; Adiga, Umesh; Ng, Esmond G. & Chiu, Wah
Object Type:
Article
System:
The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Monday, July 28, 2008
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 28, 2008
Creator:
unknown
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Financial Management: DOD's Ability to Prevent, Identify, Investigate, and Report on Antideficiency Act Violations
Correspondence issued by the Government Accountability Office with an abstract that begins "This report formally transmits a briefing in response to Senate Report No.110-77, which accompanied the National Defense Authorization Act for Fiscal Year 2008. The Senate Report directed GAO to review the department's efforts to prevent, identify, investigate, and report Antideficiency Act (ADA) violations and disciplinary actions taken when violations occur. On July 22, 2008, we provided our preliminary observations to staff of Congressional committees in response to the mandate. We will be reporting details on the information presented in the briefing in a future report."
Date:
July 28, 2008
Creator:
United States. Government Accountability Office.
Object Type:
Text
System:
The UNT Digital Library
Health Insurance Coverage of People Aged 55 to 64
This report shows that the near elderly are significantly more likely than other non-aged adults to be in fair or poor health, and to have had a heart attach or stroke.
Date:
July 28, 2008
Creator:
Peterson, Chris L.
Object Type:
Report
System:
The UNT Digital Library
Hydrogen Optical Fiber Sensors
Optically-based hydrogen sensors promise to deliver an added level of safety as hydrogen and fuel cell technologies enter the mainstream. More importantly, they offer reduced power consumption and lower cost, which are desirable for mass production applications such as automobiles and consumer appliances. This program addressed two of the major challenges previously identified in porous optrode-based optical hydrogen sensors: sensitivity to moisture (ambient humidity), and interference from the oxygen in air. Polymer coatings to inhibit moisture and oxygen were developed in conjunction with newer and novel hydrogen sensing chemistries. The results showed that it is possible to achieve sensitive hydrogen detection and rapid response with minimal interference from oxygen and humidity. As a result of this work, a new and more exciting avenue of investigation was developed: the elimination of the porous optrode and deposition of the sensor chemistry directly into the polymer film. Initial results have been promising, and open up a wider range of potential applications from extended optical fiber sensing networks, to simple plastic "stickers" for use around the home and office.
Date:
July 28, 2008
Creator:
Lieberman, Robert A.; Beshay, Manal & Cordero, Steven R.
Object Type:
Report
System:
The UNT Digital Library
Influence of Reaction with XeF2 on Surface Adhesion of Al and Al2O3 Surfaces
The change of surface adhesion after fluorination of Al and Al{sub 2}O{sub 3} surfaces using XeF{sub 2} was investigated with atomic force microscopy. The chemical interaction between XeF{sub 2} and Al and Al{sub 2}O{sub 3} surfaces was studied by in situ x-ray photoelectron spectroscopy. Fresh Al and Al{sub 2}O{sub 3} surfaces were obtained by etching top silicon layers of Si/Al and Si/Al{sub 2}O{sub 3} with XeF{sub 2}. The surface adhesion and chemical composition were measured as a function of time after the exposure to air or annealing (at 200 C under vauum). The correlation between the adhesion force increase and presence of AlF{sub 3} on the surface was revealed.
Date:
July 28, 2008
Creator:
Zhang, Tianfu; Park, Jeong Y.; Huang, Wenyu & Somorjai, Gabor A.
Object Type:
Article
System:
The UNT Digital Library
Intelligence Reform at the Department of Energy: Policy Issues and Organizational Alternatives
Congress in 2006 agreed to temporarily consolidate separate counterintelligence (CI) offices at the Department of Energy (DOE) and the National Security Administration (NNSA) into a single CI office under DOE control. This report analyzes both consolidations — the first authorized by Congress at Department of Energy (DOE) request; the second initiated by DOE — and examines the impact of each on the effectiveness of the Department's CI program.
Date:
July 28, 2008
Creator:
Cumming, Alfred
Object Type:
Report
System:
The UNT Digital Library
Intelligence Reform at the Department of Energy: Policy Issues and Organizational Alternatives
This report analyzes the temporary consolidations of the separate counterintelligence (CI) offices at the Department of Energy (DOE) and the National Security Administration (NSA) into a single CI office under DOE control — the first authorized by Congress at Department of Energy request; the second initiated by DOE — and examines the impact of each on the effectiveness of the Department's CI program.
Date:
July 28, 2008
Creator:
Cumming, Alfred
Object Type:
Report
System:
The UNT Digital Library
Legislative, Executive, and Judicial Officials: Process for Adjusting Pay and Current Salaries
None
Date:
July 28, 2008
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Measuring Light Reflectance of BGO Crystal Surfaces
A scintillating crystal's surface reflectance has to be well understood in order to accurately predict and optimize the crystal?s light collection through Monte Carlo simulations. In this paper, we measure the inner surface reflectance properties for BGO. The measurements include BGO crystals with a mechanically polished surface, rough-cut surface, and chemically etched surface, and with various reflectors attached, both air- coupled and with coupling compound. The measurements are performed with a laser aimed at the center of a hemispherical shaped BGO crystal. The hemispherical shape eliminates any non-perpendicular angles for light entering and exiting the crystal. The reflected light is collected with an array of photodiodes. The laser can be set at an arbitrary angle, and the photodiode array is rotated to fully cover 2? of solid angle. The current produced in the photodiodes is readout with a digital multimeter connected through a multiplexer. The two rows of photodiodes achieve 5-degree by 4-degree resolution, and the current measurement has a dynamic range of 10^5:1. The acquired data was not described by the commonly assumed linear combination of specular and diffuse (Lambertian) distributions, except for a very few surfaces. Surface roughness proved to be the most important parameter when choosing crystal …
Date:
July 28, 2008
Creator:
Janecek, Martin & Moses, William
Object Type:
Article
System:
The UNT Digital Library
National Security Strategy: Legislative Mandates, Execution to Date, and Considerations for Congress
This report reviews the current legislative mandates for key security strategic documents, assesses the recent history of execution, describes strategic documents in related fields for comparison, presents a series of considerations that may be useful in assessing current requirements and execution, and notes several major proposals for change.
Date:
July 28, 2008
Creator:
Dale, Catherine
Object Type:
Report
System:
The UNT Digital Library
Netec Cold Crucible Induction Melter Demonstration for Srnl With Simulated Sludge Batch 4 Dwpf Waste
Cold Crucible Induction Melter (CCIM) Technology is being considered as a possible next generation melter for the Defense Waste Processing Facility (DWPF). Initial and baseline demonstrations that vitrified a Sludge Batch 4 (SB4) simulant at a waste loading of 50 weight percent (versus about 38 weight percent in the current DWPF Melter) were performed by the Nuclear Engineering and Technology Institute (NETEC) in South Korea via a subcontract from the Washington Savannah River Company (WSRC). This higher waste loading was achieved by using a CCIM which can run at higher glass processing temperatures (1250 C and higher) than the current DWPF Melter (1150 C). Higher waste loadings would result in less canisters being filled and faster waste throughput at the DWPF. The main demonstration objectives were to determine the maximum melt rate/waste throughput for the NETEC CCIM with a Sludge Batch 4 simulant as well as determine the viability of this technology for use in the DWPF.
Date:
July 28, 2008
Creator:
Smith, M.; Allan Barnes, A.; Alexander Choi, A. & James Marra, J.
Object Type:
Article
System:
The UNT Digital Library
Oral History Interview with Robert Amstutz, July 28, 2008
The National Museum of the Pacific War presents an interview with Robert Amstutz. Amstutz joined the Marine Corps in November of 1943. He provides some details of his training, including shooting machine guns and the Browning Automatic Rifle (BAR). Amstutz served with C Company, 9th Marines, 3rd Division. In March of 1944 he traveled to Pearl Harbor, then on to the Marshall Islands, participating in the Battle of Eniwetok in February of 1944. In July of that same year they participated in the Battle of Guam, invading the Mariana Islands. After the battle they trained on Guam, about 20 months altogether, before the Battle of Iwo Jima. He provides some details of his time living and training on Guam. They arrived in Iwo Jima on the 3rd day of the battle in February of 1945. He provides details of some of his combat experiences at Iwo, using the BAR. In March he was wounded by shell fragments and sent back to Guam on a hospital ship. He received a Purple Heart and Three Battle Stars. He was discharged in March of 1946.
Date:
July 28, 2008
Creator:
Amstutz, Robert
Object Type:
Sound
System:
The Portal to Texas History
Oral History Interview with Robert Amstutz, July 28, 2008
The National Museum of the Pacific War presents an interview with Robert Amstutz. Amstutz joined the Marine Corps in November of 1943. He provides some details of his training, including shooting machine guns and the Browning Automatic Rifle (BAR). Amstutz served with C Company, 9th Marines, 3rd Division. In March of 1944 he traveled to Pearl Harbor, then on to the Marshall Islands, participating in the Battle of Eniwetok in February of 1944. In July of that same year they participated in the Battle of Guam, invading the Mariana Islands. After the battle they trained on Guam, about 20 months altogether, before the Battle of Iwo Jima. He provides some details of his time living and training on Guam. They arrived in Iwo Jima on the 3rd day of the battle in February of 1945. He provides details of some of his combat experiences at Iwo, using the BAR. In March he was wounded by shell fragments and sent back to Guam on a hospital ship. He received a Purple Heart and Three Battle Stars. He was discharged in March of 1946.
Date:
July 28, 2008
Creator:
Amstutz, Robert
Object Type:
Text
System:
The Portal to Texas History
Prescription Drugs: FDA's Oversight of the Promotion of Drugs for Off-Label Uses
A letter report issued by the Government Accountability Office with an abstract that begins "The Food and Drug Administration (FDA), an agency within the Department of Health and Human Services (HHS), regulates the promotion of prescription drugs to ensure that promotional materials are not false and misleading and that they comply with applicable laws and regulations. Among other things, FDA prohibits drug companies from promoting drugs for off-label uses--that is, for a condition or patient population for which the drug has not been approved or in a manner that is inconsistent with information found on the approved drug label. Although doctors may prescribe drugs off label, it is not permissible for drug companies to promote drugs for off-label uses. FDA may take regulatory actions for violations, and may also pursue enforcement action through the Department of Justice (DOJ). GAO was asked for information about the promotion of drugs for off-label uses. GAO reviewed (1) how FDA oversees the promotion of off-label uses of prescription drugs and (2) what actions have been taken to address off-label promotions. GAO examined documentation related to the promotion of drugs for off-label uses and FDA correspondence with drug companies on identified violations and obtained information …
Date:
July 28, 2008
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Revising the National Ambient Air Quality Standard for Lead
This report provides background on the National Ambient Air Quality Standard (NAAQS), the process used to establish the standards, the factors leading to the reduction in lead emissions, and the proposed changes to the lead standard, as well as information regarding the potential effects of any revision.
Date:
July 28, 2008
Creator:
McCarthy, James E.
Object Type:
Report
System:
The UNT Digital Library
Russian Political, Economic, and Security Issues and U.S. Interests
This report discusses the current political and economic conditions in Russia, focusing on the impact of Vladimir Putin's leadership and the leadership of his successor/protégé , Dmitriy Medvedev, both of which have steered Russia away from progress toward democratization. The report also discusses the state of the economy since the Soviet collapse in 1999, how the recent global economic downturn has affected Russia, the state of Russia's military, and the current relationship between Russia and the United States.
Date:
July 28, 2008
Creator:
Goldman, Stuart D.
Object Type:
Report
System:
The UNT Digital Library
Sapulpa Daily Herald (Sapulpa, Okla.), Vol. 93, No. 219, Ed. 1 Monday, July 28, 2008
Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 28, 2008
Creator:
Shance, Brenda
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Serbia: Current Issues and U.S. Policy
Serbia is currently seeking to integrate into the European Union (EU), but its progress has been hindered by a failure to arrest remaining indicted war criminals and by tensions with the United States and most EU countries over the independence of Serbia's Kosovo province. This report describes the current unstable political conditions in Serbia and Serbia's relations with the U.S. and EU nations.
Date:
July 28, 2008
Creator:
Woehrel, Steven
Object Type:
Report
System:
The UNT Digital Library
SLUDGE BATCH 5 ACCEPTANCE EVALUATION RADIONUCLIDE CONCENTRATIONS IN TANK 51 SB5 QUALIFICATION SAMPLE PREPARED AT SRNL
Presented in this report are radionuclide concentrations required as part of the program of qualifying Sludge Batch Five (SB5) for processing in the Defense Waste Processing Facility (DWPF). Part of this SB5 material is currently in Tank 51 being washed and prepared for transfer to Tank 40. The acceptance evaluation needs to be completed prior to the transfer of the material in Tank 51 to Tank 40 to complete the formation of SB5. The sludge slurry in Tank 40 has already been qualified for DWPF and is currently being processed as SB4. The radionuclide concentrations were measured or estimated in the Tank 51 SB5 Qualification Sample prepared at Savannah River National Laboratory (SRNL). This sample was prepared from the three liter sample of Tank 51 sludge slurry taken on March 21, 2008. The sample was delivered to SRNL where it was initially characterized in the Shielded Cells. Under direction of the Liquid Waste Organization it was then modified by five washes, six decants, an addition of Pu/Be from Canyon Tank 16.4, and an addition of NaNO2. This final slurry now has a composition expected to be similar to that of the slurry in Tank 51 after final preparations have been …
Date:
July 28, 2008
Creator:
Bannochie, C; Ned Bibler, N & David Diprete, D
Object Type:
Report
System:
The UNT Digital Library
Terrorism and Security Issues Facing the Water Infrastructure Sector
This report presents an overview of the large and diverse sector of water infrastructure systems, describes security-related actions by the government and private sector since September 11, and discusses additional policy issues and responses, including congressional interest.
Date:
July 28, 2008
Creator:
Copeland, Claudia
Object Type:
Report
System:
The UNT Digital Library
Texas Attorney General Opinion: GA-0649
Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Greg Abbott, regarding a legal question submitted for clarification: Whether a rule of the Department of Family and Protective Services conflicts with section 42.041(a), Human Resources Code, which requires a license to operate a child-care facility (RQ-0670-GA)
Date:
July 28, 2008
Creator:
Texas. Attorney-General's Office.
Object Type:
Text
System:
The Portal to Texas History
WTO Decisions and Their Effect in U.S. Law
Congress has comprehensively dealt with the legal effect of World Trade Organization (WTO) agreements and dispute settlement results in the United States in the Uruguay Round Agreements Act (URAA), P.L. 103-465, which provides that domestic law prevails over conflicting provisions of WTO agreements and prohibits private remedies based on alleged violations of these agreements. This report analyzes the URAA in detail and outlines various WTO decisions and their effect on U.S. trade law and policy.
Date:
July 28, 2008
Creator:
Grimmett, Jeanne J.
Object Type:
Report
System:
The UNT Digital Library
The Bastrop Advertiser (Bastrop, Tex.), Vol. 154, No. 44, Ed. 1 Saturday, July 28, 2007
Semi-weekly newspaper from Bastrop, Texas that includes local, state and national news along with advertising.
Date:
July 28, 2007
Creator:
McAuley, Davis
Object Type:
Newspaper
System:
The Portal to Texas History