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853
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4,113 Matching Results
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Kazakhstan: Recent Developments and U.S. Interests
None
Date:
August 20, 2009
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Long-term Observations of the Convective Boundary Layer Using Insect Radar Returns at the SGP ARM Climate Research Facility
A long-term study of the turbulent structure of the convective boundary layer (CBL) at the U.S. Department of Energy Atmospheric Radiation Measurement Program (ARM) Southern Great Plains (SGP) Climate Research Facility is presented. Doppler velocity measurements from insects occupying the lowest 2 km of the boundary layer during summer months are used to map the vertical velocity component in the CBL. The observations cover four summer periods (2004-08) and are classified into cloudy and clear boundary layer conditions. Profiles of vertical velocity variance, skewness, and mass flux are estimated to study the daytime evolution of the convective boundary layer during these conditions. A conditional sampling method is applied to the original Doppler velocity dataset to extract coherent vertical velocity structures and to examine plume dimension and contribution to the turbulent transport. Overall, the derived turbulent statistics are consistent with previous aircraft and lidar observations. The observations provide unique insight into the daytime evolution of the convective boundary layer and the role of increased cloudiness in the turbulent budget of the subcloud layer. Coherent structures (plumes-thermals) are found to be responsible for more than 80% of the total turbulent transport resolved by the cloud radar system. The extended dataset is suitable …
Date:
August 20, 2009
Creator:
Chandra, A. S.; Kollias, P.; Giangrande, S. E. & Klein, S.. A.
Object Type:
Article
System:
The UNT Digital Library
Noncitizen Health Insurance Coverage and Use of Select Safety-Net Providers
None
Date:
August 20, 2009
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Plasma Response to Lithium-Coated Plasma-Facing Components in the National Spherical Torus Experiment
Experiments in the National Spherical Torus Experiment (NSTX) have shown beneficial effects on the performance of divertor plasmas as a result of applying lithium coatings on the graphite and carbonfiber- composite plasma-facing components. These coatings have mostly been applied by a pair of lithium evaporators mounted at the top of the vacuum vessel which inject collimated streams of lithium vapor towards the lower divertor. In NBI-heated, deuterium H-mode plasmas run immediately after the application of lithium, performance modifications included decreases in the plasma density, particularly in the edge, and inductive flux consumption, and increases in the electron and ion temperatures and the energy confinement time. Reductions in the number and amplitude of ELMs were observed, including complete ELM suppression for periods up to 1.2 s, apparently as a result of altering the stability of the edge. However, in the plasmas where ELMs were suppressed, there was a significant secular increase in the effective ion charge Zeff and the radiated power as a result of increases in the carbon and medium-Z metallic impurities, although not of lithium itself which remained at a very low level in the plasma core, <0.1%. The impurity buildup could be inhibited by repetitively triggering ELMs with …
Date:
August 20, 2009
Creator:
M.G. Bell, H.W. Kugel, R. Kaita, L.E. Zakharov, H. Schneider, B.P. LeBlanc, D. Mansfield, R.E. Bell, R. Maingi, S. Ding, S.M. Kaye, S.F. Paul, S.P. Gerhardt, J.M. Canik, J.C. Hosea, G. Taylor and the NSTX Research Team
Object Type:
Report
System:
The UNT Digital Library
Preimplantation genetic diagnosis for gender selection in the United States
Preimplantation genetic diagnosis (PGD) of gender selection for non medical reasons has been considered an unethical procedure by several authors and agencies in the Western society on the basis of disrupting the sex ratio, being discriminatory againsts women and disposal of normal embryos of the non desired gender. In this study, the analysis of a large series of PGD procedures for gender selection from a wide geographical area in the United States, shows that in general there is no deviation in preference towards any specific gender except for a preference of males in some ethnic populations of Chinese, Indian and Middle Eastern origin that represent a small percentage of the US population. In cases where only normal embryos of the non-desired gender are available, 45.5% of the couples elect to cancel the transfer, while 54.5% of them are open to have transferred embryos of the non-desired gender, this fact being strongly linked to cultural and ethnical background of the parents. In addition this study adds some evidence to the proposition that in couples with previous children of a given gender there is no biological predisposition towards producing embryos of that same gender. Based on these facts, it seems that objections …
Date:
August 20, 2009
Creator:
Colls, P.; Silver, L.; Olivera, G.; Weier, J.; Escudero, T.; Goodall, N. et al.
Object Type:
Report
System:
The UNT Digital Library
School Meal Programs: Changes to Federal Agencies' Procedures Could Reduce Risk of School Children Consuming Recalled Food
A letter report issued by the Government Accountability Office with an abstract that begins "Over the past few years, several food recalls, such as for beef and peanut products, have affected schools. It is especially important that recalls affecting schools be carried out efficiently and effectively because young children have a higher risk of complications from food-borne illnesses. GAO was asked to determine how federal agencies (1) notified states and schools about food recalls, (2) advised states and schools about disposal and reimbursement of recalled food, and (3) ensured that recalls were being carried out effectively. To do this, GAO reviewed and analyzed relevant documents and interviewed federal and state officials, as well as officials from 23 school districts that had experience with at least one of four recent cases involving the safety of food in the school lunch program."
Date:
August 20, 2009
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Social Security Administration: Administrative Budget Issues
The Social Security Administration (SSA) administers the Social Security program (Old-Age, Survivors and Disability Insurance, or OASDI) and the Supplemental Security Income (SSI) program, and provides administrative support to Medicare and several other federal programs. Total SSA spending in FY2008 was about $658 billion, about 99% of which was mandatory spending on benefit payments. This report focuses on SSA’s administrative spending, which is discretionary and amounts to about 1% of SSA’s total spending. This funding is provided in the Labor, Health and Human Services, Education, and Related Agencies appropriations bill.
Date:
August 20, 2009
Creator:
Scott, Christine
Object Type:
Report
System:
The UNT Digital Library
Social Security: What Would Happen If the Trust Funds Ran Out?
This report looks at ways to overhaul the Social Security system due to a projected lack of system funds, which are estimated to become exhausted in 2041.
Date:
August 20, 2009
Creator:
Scott, Christine
Object Type:
Report
System:
The UNT Digital Library
Synthesis and Characterization of Novel Preceramic Polymer for SiC
Polyphenylcarbosilane as a novel preceramic polymer for SiC was synthesized from thermal rearrangement of polymethylphenylsilane around 350 C {approx} 430 C. Characterization of synthesized polyphenylcarbosilane was performed with {sup 29}Si, {sup 13}C, {sup 1}H NMR, FT-IR, TG, XRD, and GPC analysis. From FT-IR data, the band at 1035 cm{sup -1} was very strong and assigned to CH{sub 2} bending vibration in Si-CH{sub 2}-Si group, indicating the formation of the polyphenylcarbosilane. The average of the molecular weight (M{sub w}) of the polyphenylcarbosilane synthesized was 2,500 and easily dissolves in an organic solvent. TGA data indicates that polyphenylcarbosilane is thermally stable up to 400 C. However, the rapid weight loss occurs above 400 C due to the pyrolysis of polyphenylcarbosilane, and the diffraction peak of pyrolysis residue at 1200 C corresponds to the {beta}-SiC ceramic. The ceramic yield calculated from TGA is approximately 65%.
Date:
August 20, 2009
Creator:
Lee, Y. J.; Lee, J. H.; Kim, S. R.; Kwon, W. T.; Oh, H.; Klepeis, J. P. et al.
Object Type:
Article
System:
The UNT Digital Library
Taiwan: Major U.S. Arms Sales Since 1990
This report discusses U.S. security assistance to Taiwan (calling itself Republic of China (ROC)), including policy issues for Congress and legislation.
Date:
August 20, 2009
Creator:
Kan, Shirley A.
Object Type:
Report
System:
The UNT Digital Library
Thoughts on Incorporating HPRF in a Linear Cooling Channel
We discuss a possible implementation of high-pressure gas-filled RF (HPRF) cavities in a linear cooling channel for muons and some of the technical issues that must be dealt with. The approach we describe is a hybrid approach that uses high-pressure hydrogen gas to avoid cavity breakdown, along with discrete LiH absorbers to provide the majority of the energy loss. Initial simulations show that the channel performs as well as the original vacuum RF channel while potentially avoiding the degradation in RF gradient associated with the strong magnetic field in the cooling channel.
Date:
August 20, 2009
Creator:
Gallardo, Juan C. & Zisman, Michael S
Object Type:
Article
System:
The UNT Digital Library
Transuranic Contamination in Sediment and Groundwater at the U.S. DOE Hanford Site
A review of transuranic radionuclide contamination in sediments and groundwater at the DOE’s Hanford Site was conducted. The review focused primarily on plutonium-239/240 and americium-241; however, other transuranic nuclides were discussed as well, including neptunium-237, plutonium-238, and plutonium-241. The scope of the review included liquid process wastes intentionally disposed to constructed waste disposal facilities such as trenches and cribs, burial grounds, and unplanned releases to the ground surface. The review did not include liquid wastes disposed to tanks or solid wastes disposed to burial grounds. It is estimated that over 11,800 Ci of plutonium-239, 28,700 Ci of americium-241, and 55 Ci of neptunium-237 have been disposed as liquid waste to the near surface environment at the Hanford Site. Despite the very large quantities of transuranic contaminants disposed to the vadose zone at Hanford, only minuscule amounts have entered the groundwater. Currently, no wells onsite exceed the DOE derived concentration guide for plutonium-239/240 (30 pCi/L) or any other transuranic contaminant in filtered samples. The DOE derived concentration guide was exceeded by a small fraction in unfiltered samples from one well (299-E28-23) in recent years (35.4 and 40.4 pCi/L in FY 2006). The primary reason that disposal of these large quantities of …
Date:
August 20, 2009
Creator:
Cantrell, Kirk J.
Object Type:
Report
System:
The UNT Digital Library
Unauthorized Aliens' Access to Federal Benefits: Policy and Issues
This report focuses on the policy and legislative debate surrounding unauthorized aliens' access to federal benefits.
Date:
August 20, 2009
Creator:
Wasem, Ruth Ellen
Object Type:
Report
System:
The UNT Digital Library
VPP ANNUAL SELF-EVALUATION BY THE NUMBERS
None
Date:
August 20, 2009
Creator:
JE, GRIFFITH
Object Type:
Article
System:
The UNT Digital Library
What Can DMIS 5.2 Do For You?
The Dimensional Measuring Interface Standard (DMIS) is the first data interoperability protocol standard created specifically for dimensional metrology. DMIS applications are multi-facetted. The standard can behave as a coordinate metrology language to execute measurement part programs, or it can be used as a neutral data exchange mechanism for part programs and measurement results. DMIS is full featured and has many successful implementations. It also has a strong reputation as a progressive standard, one that has been responsive to user needs and technology advances. It is maintained and improved upon by a volunteer committee, the DMIS Standards Committee (DSC), under the auspices of the Dimensional Metrology Standards Consortium (DMSC Inc.). DMIS has progressed as its eighth version and its sixth as a national and/or international standard. Some notable advances of DMIS have included: • support for thin-walled (i.e., sheet-metal) measurements • alignment with American and International tolerancing standards • complete suite of measure features • harmonization with complementary standards and specifications • extension of additional sensors and scanning processes • introduction of measurement uncertainty computations • tighter CAD associativity • enhancements for multi-axis scanning • provisioning for functional subsets (application profiles) • progression of conformance class validations • designation of key …
Date:
August 20, 2009
Creator:
Brown, Curtis W.
Object Type:
Article
System:
The UNT Digital Library
Afghanistan: Post-Taliban Governance, Security, and U.S. Policy
This report discusses the current political state of Afghanistan, focusing particularly on the influence of the Taliban and other militant groups and on the leadership of Afghan President Hamid Karzai. This report also discusses the U.S.-Afghanistan relationship and U.S. efforts under the Obama Administration to provide military, reconstructive, and stabilization aid.
Date:
July 20, 2009
Creator:
Katzman, Kenneth
Object Type:
Report
System:
The UNT Digital Library
Annual Report of the Integrated Status and Effectiveness Monitoring Program: Fiscal Year 2008
This document was created as an annual report detailing the accomplishments of the Integrated Status and Effectiveness Monitoring Program (ISEMP) in the Upper Columbia Basin in fiscal year 2008. The report consists of sub-chapters that reflect the various components of the program. Chapter 1 presents a report on programmatic coordination and accomplishments, and Chapters 2 through 4 provide a review of how ISEMP has progressed during the 2008 fiscal year in each of the pilot project subbasins: the John Day (Chapter 2), Wenatchee/Entiat (Chapter 3) and Salmon River (Chapter 4). Chapter 5 presents a report on the data management accomplishments in 2008.
Date:
July 20, 2009
Creator:
Terraqua, Inc. (Wauconda, WA)
Object Type:
Report
System:
The UNT Digital Library
ASSESSMENT OF TECHNETIUM LEACHABILITY IN CEMENT-STABILIZED BASIN 43 GROUNDWATER BRINE
This report documents the effort to sequester technetium by the use of getters, reductants (tin(II) apatite and ferrous sulfate), sorbents (A530E and A532E ion exchange resins), and cementitious waste form. The pertechnetate form of technetium is highly soluble and mobile in aerobic (oxidizing) environments.
Date:
July 20, 2009
Creator:
Duncan, J. B.; Cooke, G. A. & Lockrem, L. L.
Object Type:
Report
System:
The UNT Digital Library
An atomic inner-shell laser pumped with an x-ray free-electron laser
None
Date:
July 20, 2009
Creator:
Rohringer, N
Object Type:
Article
System:
The UNT Digital Library
The Budget Reconciliation Process: Motions to Instruct Conferees
The report discusses the budget reconciliation process that operates as an adjunct to the budget resolution process. The chief purpose of the reconciliation process is to enhance congress's ability to change current law in order to bring revenue, spending, and debt-limit levels in conformity with the policies expresses in the budget resolution.
Date:
July 20, 2009
Creator:
Keith, Robert
Object Type:
Report
System:
The UNT Digital Library
Closing the Guantanamo Detention Center: Legal Issues
This report provides an overview of major legal issues likely to arise as a result of executive and legislative action to close the Guantanamo detention facility. It discusses legal issues related to the transfer of Guantanamo detainees, the continued detention of such persons in the United States, and the possible removal of persons brought into the country. It also discusses selected constitutional issues that may arise in the criminal prosecution of detainees, emphasizing the procedural and substantive protections that are utilized in different adjudicatory forums.
Date:
July 20, 2009
Creator:
Garcia, Michael John; Bazan, Elizabeth B.; Mason, R. Chuck; Liu, Edward C. & Henning, Anna C.
Object Type:
Report
System:
The UNT Digital Library
Developing the Physics Design for Ndcx-Ii, a Unique Pulse-Compressing Ion Accelerator
The Heavy Ion Fusion Science Virtual National Laboratory(a collaboration of LBNL, LLNL, and PPPL) is using intense ion beams to heat thin foils to the"warm dense matter" regime at<~;; 1 eV, and is developing capabilities for studying target physics relevant to ion-driven inertial fusion energy. The need for rapid target heating led to the development of plasma-neutralized pulse compression, with current amplification factors exceeding 50 now routine on the Neutralized Drift Compression Experiment (NDCX). Construction of an improved platform, NDCX-II, has begun at LBNL with planned completion in 2012. Using refurbished induction cells from the Advanced Test Accelerator at LLNL, NDCX-II will compress a ~;;500 ns pulse of Li+ ions to ~;;1 ns while accelerating it to 3-4 MeV over ~;;15 m. Strong space charge forces are incorporated into the machine design at a fundamental level. We are using analysis, an interactive 1D PIC code (ASP) with optimizing capabilities and centroid tracking, and multi-dimensional Warpcode PIC simulations, to develop the NDCX-II accelerator. This paper describes the computational models employed, and the resulting physics design for the accelerator.
Date:
July 20, 2009
Creator:
Friedman, A.; Barnard, J. J.; Cohen, R. H.; Grote, D. P.; Lund, S. M.; Sharp, W. M. et al.
Object Type:
Article
System:
The UNT Digital Library
Drug Control: U.S. Counternarcotics Cooperation with Venezuela Has Declined
A letter report issued by the Government Accountability Office with an abstract that begins "Hundreds of metric tons of cocaine flow annually from South America toward the United States, threatening the security and well-being of U.S. citizens. Since 2000, the United States has provided about $8 billion to countries in the region to disrupt drug trafficking. Most of this assistance went to Colombia to reduce illicit drug production and improve security. In March 2009, the Department of State reported that Venezuela had become a major transit route for cocaine out of Colombia, with a more than fourfold increase in cocaine flow between 2004 and 2007. We determined (1) what is known about cocaine trafficking through Venezuela, (2) what is known about Venezuelan support for Colombian illegal armed groups, and (3) the status of U.S and Venezuelan counternarcotics cooperation since 2002. To address these objectives, we reviewed U.S. counternarcotics reports, assessments, and other documents regarding illicit drugs transiting Venezuela. We also traveled to Venezuela and Colombia to discuss these matters with U.S. and foreign government officials."
Date:
July 20, 2009
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
FREE STANDING NANOSTRUCTURED ANODES FOR LI-ION RECHARGEABLE BATTERIES
The free standing nanorodes of aluminum and cobalt oxides were grown on electrode and tested as the anodes directly in the half-cell. The average diameter and length of the nanorods are 80 nm and 200 nm respectively. The aligned nanorods demonstrated high initial capacity from 1200-1400 mAh/g at rate of 0.5C. The gradually decrease of initial capacity was observed. The preliminary characterization shows that the changes of the crystalline structure and morphology during cycling may be responsible for the capacity decay.
Date:
July 20, 2009
Creator:
Au, M.
Object Type:
Article
System:
The UNT Digital Library