Partner
UNT Libraries Government Documents Department
195
UNT Libraries
80
UNT Libraries Special Collections
44
Oklahoma Historical Society
38
UNT Music Library
22
Sterling Municipal Library
10
Carl Albert Congressional Research and Studies Center
7
National Museum of the Pacific War/Admiral Nimitz Foundation
6
San Antonio Public Library
6
Rice University Woodson Research Center
5
51 More
Collection
Texas Digital Newspaper Program
95
Office of Scientific & Technical Information Technical Reports
83
Congressional Research Service Reports
68
Photographing Texas
65
Oklahoma Digital Newspaper Program
46
Tocker Foundation Grant
38
Government Accountability Office Reports
34
The Black Academy of Arts and Letters Records
26
College of Music Recordings
22
The Greensheet
12
87 More
Degree Department
Degree Discipline
Degree Level
Country
States
Decade
Month
Day
480 Matching Results
Results open in a new window/tab.
Long-Term Reduction in 137Cs Concentration in Food Crops on Coral Atolls Resulting from Potassium Treatment
Bikini Island was contaminated March 1, 1954 by the Bravo detonation (U.S nuclear test series, Castle) at Bikini Atoll. About 90% of the estimated dose from nuclear fallout to potential island residents is from cesium-137 ({sup 137}Cs) transferred from soil to plants that are consumed by residents. Thus, radioecology research efforts have been focused on removing {sup 137}Cs from soil and/or reducing its uptake into vegetation. Most effective was addition of potassium (K) to soil that reduces {sup 137}Cs concentration in fruits to 3-5% of pretreatment concentrations. Initial observations indicated this low concentration continued for some time after K was last applied. Long-term studies were designed to evaluate this persistence in more detail because it is very important to provide assurance to returning populations that {sup 137}Cs concentrations in food (and, therefore, radiation dose) will remain low for extended periods, even if K is not applied annually or biennially. Potassium applied at 300, 660, 1260, and 2070 kg ha{sup -1} lead to a {sup 137}Cs concentration in drinking coconut meat that is 34, 22, 10, and about 4% of original concentration, respectively. Concentration of {sup 137}Cs remains low 8 to 10 y after K is last applied. An explanation for …
Date:
April 14, 2004
Creator:
Robison, W L; Stone, E L; Hamilton, T F & Conrado, C L
Object Type:
Article
System:
The UNT Digital Library
Space-Time Approximation with Sparse Grids
In this article we introduce approximation spaces for parabolic problems which are based on the tensor product construction of a multiscale basis in space and a multiscale basis in time. Proper truncation then leads to so-called space-time sparse grid spaces. For a uniform discretization of the spatial space of dimension d with O(N{sup d}) degrees of freedom, these spaces involve for d > 1 also only O(N{sup d}) degrees of freedom for the discretization of the whole space-time problem. But they provide the same approximation rate as classical space-time Finite Element spaces which need O(N{sup d+1}) degrees of freedoms. This makes these approximation spaces well suited for conventional parabolic and for time-dependent optimization problems. We analyze the approximation properties and the dimension of these sparse grid space-time spaces for general stable multiscale bases. We then restrict ourselves to an interpolatory multiscale basis, i.e. a hierarchical basis. Here, to be able to handle also complicated spatial domains {Omega}, we construct the hierarchical basis from a given spatial Finite Element basis as follows: First we determine coarse grid points recursively over the levels by the coarsening step of the algebraic multigrid method. Then, we derive interpolatory prolongation operators between the respective coarse …
Date:
April 14, 2005
Creator:
Griebel, M; Oeltz, D & Vassilevski, P S
Object Type:
Article
System:
The UNT Digital Library
Studies of the Atmospheric Chemsitry of Energy-Related Volatile Organic Compounds and of their Atmospheric Reaction Products
The focus of this contract was to investigate selected aspects of the atmospheric chemistry of volatile organic compounds (VOCs) emitted into the atmosphere from energy-related sources as well as from biogenic sources. The classes of VOCs studied were polycyclic aromatic hydrocarbons (PAHs) and nitro-PAHs, the biogenic VOCs isoprene, 2-methyl-3-buten-2-ol and cis-3-hexen-1-ol, alkenes (including alkenes emitted from vegetation) and their oxygenated atmospheric reaction products, and a series of oxygenated carbonyl and hydroxycarbonyl compounds formed as atmospheric reaction products of aromatic hydrocarbons and other VOCs. Large volume reaction chambers were used to investigate the kinetics and/or products of photolysis and of the gas-phase reactions of these organic compounds with hydroxyl (OH) radicals, nitrate (NO3) radicals, and ozone (O3), using an array of analytical instrumentation to analyze the reactants and products (including gas chromatography, in situ Fourier transform infrared spectroscopy, and direct air sampling atmospheric pressure ionization tandem mass spectrometry). The following studies were carried out. The photolysis rates of 1- and 2-nitronaphthalene and of eleven isomeric methylnitronaphthalenes were measured indoors using blacklamp irradiation and outdoors using natural sunlight. Rate constants were measured for the gas-phase reactions of OH radicals, Cl atoms and NO3 radicals with naphthalene, 1- and 2-methylnaphthalene, 1- and 2-ethylnaphthalene …
Date:
April 14, 2007
Creator:
Atkinson, Roger & Arey, Janet
Object Type:
Report
System:
The UNT Digital Library
Wavefront control for the Gemini Planet Imager
The wavefront control strategy for the proposed Gemini Planet Imager, an extreme adaptive optics coronagraph for planet detection, is presented. Two key parts of this strategy are experimentally verified in a testbed at the Laboratory for Adaptive Optics, which features a 32 x 32 MEMS device. Detailed analytic models and algorithms for Shack-Hartmann wavefront sensor alignment and calibration are presented. It is demonstrated that with these procedures, the spatially filtered WFS and the Fourier Transform reconstructor can be used to flatten to the MEMS to 1 nm RMS in the controllable band. Performance is further improved using the technique of modifying the reference slopes using a measurement of the static wavefront error in the science leg.
Date:
April 14, 2006
Creator:
Poyneer, L A; Veran, J; Dillon, D; Severson, S & Macintosh, B
Object Type:
Article
System:
The UNT Digital Library
Quenching of the nonlocal electron heat transport by large external magnetic fields in a laser produced plasma measured with imaging Thomson scattering
We present a direct measurement of the quenching of nonlocal heat transport in a laser produced plasma by high external magnetic fields. Temporally resolved measurements of the electron temperature profile transverse to a high power laser beam were obtained using imaging Thomson scattering. The results are simulated with the 2D hydrodynamic code LASNEX with a recently included magnetic field model that self-consistently evolves the fields in the plasma.
Date:
April 14, 2006
Creator:
Froula, D H; Davis, P; Pollock, B B; Divol, L; Ross, J S; Edwards, J et al.
Object Type:
Article
System:
The UNT Digital Library
Measurement of the CKM Angle Alpha at BaBar
We present BABAR experiment studies to measure the CKM angle {alpha} of the Unitarity Triangle. The measurements are based on the B meson decays into the two-body state ({pi}{pi}), the quasi two-body state ({rho}{rho}), and the three-body state ({pi}{sup +}{pi}{sup -}{pi}{sup 0}). The results are obtained from data samples of about 230 million {Upsilon}(4S) {yields} B{bar B} decays collected between 1999 and 2004 with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC.
Date:
April 14, 2006
Creator:
Yeche, C.
Object Type:
Article
System:
The UNT Digital Library
3rd year final contractor report for: U.S. Department of Energy Stewardship Science Academic Alliances Program Project Title: Detailed Measurements of Rayleigh-Taylor Mixing at Large and Small Atwood Numbers
This project had two major tasks: Task 1. The construction of a new air/helium facility to collect detailed measurements of Rayleigh-Taylor (RT) mixing at high Atwood number, and the distribution of these data to LLNL, LANL, and Alliance members for code validation and design purposes. Task 2. The collection of initial condition data from the new Air/Helium facility, for use with validation of RT simulation codes at LLNL and LANL. This report describes work done in the last twelve (12) months of the project, and also contains a summary of the complete work done over the three (3) life of the project. As of April 1, 2006, the air/helium facility (Task 1) is now complete and extensive testing and validation of diagnostics has been performed. Initial condition studies (Task 2) is also comp lete. Detailed experiments with air/helium with Atwood numbers up to 0.1 have been completed, and Atwood numbers of 0.25. Within the last three (3) months we have been able to successfully run the facility at Atwood numbers of 0.5. The progress matches the project plan, as does the budget. We have finished the initial condition studies using the water channel, and this work has been accepted for …
Date:
April 14, 2006
Creator:
Andrews, Malcolm J.
Object Type:
Report
System:
The UNT Digital Library
Search for Neutral D Meson Mixing using Semileptonic Decays
Based on a 87 fb{sup -1} dataset, a search for D{sup 0}-{bar D}{sup 0} mixing is made using the semileptonic decay modes D*{sup +} {yields} {pi}{sup +} D{sup 0}, D{sup 0} {yields} [K/K*]e{nu} (+c.c.) at the B-Factory facility at the Stanford Linear Accelerator Center. These modes offer unambiguous initial and final-state charm flavor tags, and allow the combined use of the D{sup 0} lifetime and D*{sup +}-D{sup 0} mass difference ({Delta}M) in a global likelihood fit. The high-statistics sample of reconstructed unmixed semileptonic D{sup 0} decays is used to model both the {Delta}M distribution and the time-dependence of mixed events directly from the data. Neural networks are used both to select events and to fully reconstruct the D{sup 0}. A result consistent with no charm mixing has been obtained, R{sub mix} < 0.0047 (95% C.L.) and R{sub mix} < 0.0043 (90% C.L.). The lowest current published limit on semileptonic charm mixing is 0.005 (90% C.L.) (E791, E.M. Aitala et al. Phys.Rev.Lett. 77 2384 (1996)). The current best published limit using any analysis technique on the total rate of charm mixing is 0.0016 (95% C.L.) (Bab K{pi} mixing, B. Aubert et al., Phys. Rev. Lett. 91 171801 (2003)).
Date:
April 14, 2006
Creator:
Flood, Kevin T. & /Massachusetts U., Amherst
Object Type:
Report
System:
The UNT Digital Library
Orientation for New State WAP Directors and Staff
NASCSP has been providing The Orientation for New Weatherization Assistance Program (WAP) State Directors and Staff yearly for the past four years. This report is a general description of the trainings and supporting documentation from the most recent event. The Orientation and Training provides attendees with a comprehensive overview of the WAP from the federal, state, and local perspectives. A variety of presenters make information available on a wide range of subjects deemed necessary to effectively operate the Program. During the first day of training, staff from the Department of Energy WAP office, NASCSP, the National Energy Assistance Director's Association, Economic Opportunity Studies, and Oak Ridge National Laboratory present materials and participate in open discussion with the attendees about the federal program requirements. Some of the day's subjects include: History of the WAP; Funding, Rules, Regulations, and Program Guidance Documents; WAP State Plan Application Process and Submission; Training and Technical Assistance Activity; Administration and Federal/State Monitoring Requirements; and National Significance of WAP and the Political Process. The second day focuses on implementation strategies for the Program. Presenters from state offices and local management provide their perspective on the following subjects: Utility Restructuring Integration Strategies; Program Expansion Issues; Integration of New …
Date:
April 14, 2003
Creator:
Adams, Robert & Barone, Tracy
Object Type:
Report
System:
The UNT Digital Library
Argonne Laboratory Computing Resource Center - FY2004 Report.
In the spring of 2002, Argonne National Laboratory founded the Laboratory Computing Resource Center, and in April 2003 LCRC began full operations with Argonne's first teraflops computing cluster. The LCRC's driving mission is to enable and promote computational science and engineering across the Laboratory, primarily by operating computing facilities and supporting application use and development. This report describes the scientific activities, computing facilities, and usage in the first eighteen months of LCRC operation. In this short time LCRC has had broad impact on programs across the Laboratory. The LCRC computing facility, Jazz, is available to the entire Laboratory community. In addition, the LCRC staff provides training in high-performance computing and guidance on application usage, code porting, and algorithm development. All Argonne personnel and collaborators are encouraged to take advantage of this computing resource and to provide input into the vision and plans for computing and computational analysis at Argonne. Steering for LCRC comes from the Computational Science Advisory Committee, composed of computing experts from many Laboratory divisions. The CSAC Allocations Committee makes decisions on individual project allocations for Jazz.
Date:
April 14, 2005
Creator:
Bair, R.
Object Type:
Report
System:
The UNT Digital Library
Mask defect verification using actinic inspection and defect mitigation technology
The availability of defect-free masks remains one of the key challenges for inserting extreme ultraviolet lithography (EUVL) into high volume manufacturing. The successful production of defect-free masks will depend on the timely development of defect inspection tools, including both mask blank inspection tools and absorber pattern inspection tools to meet the 22 nm half-pitch node. EUV mask blanks with embedded phase defects were inspected with a reticle actinic inspection tool (AIT) and the Lasertec M7360. The Lasertec M7360 is operated at SEMA TECH's Mask blank Development Center (MBDC) in Albany, with sensitivity to multilayer defects down to 40-45 nm, which is not likely sufficient for mask blank development below the 32 nm half-pitch node. Phase defect printability was simulated to calculate the required defect sensitivity for the next generation blank inspection tool to support reticle development for the sub-32 nm half-pitch technology node. This paper will also discuss the kind of infrastructure that will be required in the development and mass production stages.
Date:
April 14, 2009
Creator:
Huh, Sungmin; Kearney, Patrick; Wurm, Stefan; Goodwin, Frank; Goldberg, Kenneth; Mochi, Iacopo et al.
Object Type:
Article
System:
The UNT Digital Library
Seminole Sentinel (Seminole, Tex.), Vol. 95, No. 52, Ed. 1 Sunday, April 14, 2002
Semi-weekly newspaper from Seminole, Texas that includes local, state, and national news along with extensive advertising.
Date:
April 14, 2002
Creator:
Brisendine, Lynn & Fisher, David
Object Type:
Newspaper
System:
The Portal to Texas History
[News Clip: S. Sessions/Frost pg 42D]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
April 14, 2004, 4:00 p.m.
Creator:
NBC 5 (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
Let it Go for 2006!
A piece by T. D. Jakes titled "Let it Go for 2006!" about the new year and moving forward.
Date:
April 14, 2006
Creator:
Jakes, T. D.
Object Type:
Text
System:
The UNT Digital Library
The Ranger (San Antonio, Tex.), Vol. 75, No. 22, Ed. 1 Friday, April 14, 2000
Weekly student newspaper from San Antonio College in San Antonio, Texas that includes campus news along with advertising.
Date:
April 14, 2000
Creator:
San Antonio College
Object Type:
Newspaper
System:
The Portal to Texas History
The Hopkins County Echo (Sulphur Springs, Tex.), Vol. 205, No. 14, Ed. 1 Friday, April 14, 2000
Weekly newspaper from Sulphur Springs, Texas that includes local, state, and national news along with advertising.
Date:
April 14, 2000
Creator:
Keys, Scott & Lamb, Bill
Object Type:
Newspaper
System:
The Portal to Texas History
Timpson & Tenaha News (Timpson, Tex.), Vol. 20, No. 14, Ed. 1 Thursday, April 14, 2005
Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date:
April 14, 2005
Creator:
Alexander, Nancy
Object Type:
Newspaper
System:
The Portal to Texas History
The Clifton Record (Clifton, Tex.), Vol. 105, No. 30, Ed. 1 Friday, April 14, 2000
Semi-weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
April 14, 2000
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
The Clifton Record (Clifton, Tex.), Vol. 111, No. 15, Ed. 1 Friday, April 14, 2006
Weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
April 14, 2006
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
Polk County Enterprise (Livingston, Tex.), Vol. 120, No. 30, Ed. 1 Sunday, April 14, 2002
Semi-weekly newspaper from Livingston, Texas that includes local, state and national news along with advertising.
Date:
April 14, 2002
Creator:
White, Barbara
Object Type:
Newspaper
System:
The Portal to Texas History
Comanche Chief (Comanche, Tex.), No. 50, Ed. 1 Thursday, April 14, 2005
Weekly newspaper from Comanche, Texas that includes local, state, and national news along with advertising.
Date:
April 14, 2005
Creator:
Wilkerson, James C., III
Object Type:
Newspaper
System:
The Portal to Texas History
Polk County Enterprise (Livingston, Tex.), Vol. 123, No. 30, Ed. 1 Thursday, April 14, 2005
Semi-weekly newspaper from Livingston, Texas that includes local, state and national news along with advertising.
Date:
April 14, 2005
Creator:
White, Barbara
Object Type:
Newspaper
System:
The Portal to Texas History
Seminole Sentinel (Seminole, Tex.), Vol. 95, No. 53, Ed. 1 Wednesday, April 14, 2004
Semi-weekly newspaper from Seminole, Texas that includes local, state, and national news along with extensive advertising.
Date:
April 14, 2004
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Hondo Anvil Herald (Hondo, Tex.), Vol. 119, No. 15, Ed. 1 Thursday, April 14, 2005
Weekly newspaper from Hondo, Texas that includes local, state, and national news along with extensive advertising.
Date:
April 14, 2005
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History