Partner
UNT Libraries Government Documents Department
820
Oklahoma Historical Society
402
UNT Libraries Special Collections
195
Sterling Municipal Library
30
National Museum of the Pacific War/Admiral Nimitz Foundation
25
UNT Music Library
24
Carl Albert Congressional Research and Studies Center
19
UNT Libraries
17
Alvin Community College
13
Texas Historical Commission
10
69 More
Collection
Office of Scientific & Technical Information Technical Reports
562
Jim Argo Collection
284
Texas Digital Newspaper Program
253
Congressional Research Service Reports
159
Oklahoma Digital Newspaper Program
142
Tocker Foundation Grant
124
Randy Mallory Papers
53
José L. Castillo Photograph Collection
51
Government Accountability Office Reports
50
The Black Academy of Arts and Letters Records
45
119 More
Degree Department
Degree Discipline
Degree Level
Country
States
Decade
Year
Month
1,805 Matching Results
Results open in a new window/tab.
Results:
1 - 24 of
1,805
next
Ab Initio No-Core Shell Model Calculations Using Realistic Two- and Three-Body Interactions
There has been significant progress in the ab initio approaches to the structure of light nuclei. One such method is the ab initio no-core shell model (NCSM). Starting from realistic two- and three-nucleon interactions this method can predict low-lying levels in p-shell nuclei. In this contribution, we present a brief overview of the NCSM with examples of recent applications. We highlight our study of the parity inversion in {sup 11}Be, for which calculations were performed in basis spaces up to 9{Dirac_h}{Omega} (dimensions reaching 7 x 10{sup 8}). We also present our latest results for the p-shell nuclei using the Tucson-Melbourne TM three-nucleon interaction with several proposed parameter sets.
Date:
November 30, 2004
Creator:
Navratil, P; Ormand, W E; Forssen, C & Caurier, E
Object Type:
Article
System:
The UNT Digital Library
Agricultural Conservation: USDA Should Improve Its Methods for Estimating Technical Assistance Costs
A letter report issued by the Government Accountability Office with an abstract that begins "The U.S. Department of Agriculture's (USDA) Natural Resources Conservation Service (NRCS), working with state and local partners, provides landowners with technical assistance for multiple programs to plan and implement conservation measures that protect soil, water, and wildlife. For years, the Congress has been seeking detailed cost information on this assistance as it examined USDA budget requests. In part, because NRCS's financial system was not designed for estimating future budgets, in 1998 NRCS began developing additional cost data and a computer model for estimating future technical assistance costs. GAO was asked to (1) review NRCS's technical assistance cost estimates and (2) identify causes of any differences between the estimates and actual costs ultimately reported by NRCS."
Date:
November 30, 2004
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Altus Times (Altus, Okla.), Vol. 106, No. 201, Ed. 1 Tuesday, November 30, 2004
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
November 30, 2004
Creator:
Andrews, Mike
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Appropriations for FY2005: Foreign Operations, Export Financing, and Related Programs
This report is a guide to one of the 13 regular appropriations bills that Congress considers each year, related to foreign operations, export financing and other programs. It is designed to supplement the information provided by the House and Senate Appropriations Subcommittees on Foreign Operations. It summarizes the status of the bill, its scope, major issues, funding levels, and related congressional activity, and is updated as events warrant.
Date:
November 30, 2004
Creator:
Nowels, Larry
Object Type:
Report
System:
The UNT Digital Library
An Architectural Tour of BlueGene/L
BlueGene/L is the next large supercomputer for the DOE ASC program. BlueGene/L will consist of 65,000 dual processor IBM PowerPC 440 processors, each with attached FPU. Several interconnect networks consisting of a full 3D torus, combining tree, barrier tree, and interrupt tree are used to maximize computing efficiency. The theoretical peak performance of the system is 360 Teraflops/s.
Date:
November 30, 2004
Creator:
Dossa, D
Object Type:
Article
System:
The UNT Digital Library
The Baytown Sun (Baytown, Tex.), Vol. 83, No. 360, Ed. 1 Tuesday, November 30, 2004
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
November 30, 2004
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
Boerne Star & Hill Country Recorder (Boerne, Tex.), Vol. 98, No. 84, Ed. 1 Tuesday, November 30, 2004
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
November 30, 2004
Creator:
Cartwright, Brian & Barboza, Kerry
Object Type:
Newspaper
System:
The Portal to Texas History
Brady Standard-Herald and Heart O' Texas News (Brady, Tex.), Ed. 1 Tuesday, November 30, 2004
Semiweekly newspaper from Brady, Texas that includes local, state, and national news along with advertising.
Date:
November 30, 2004
Creator:
Stewart, James E.
Object Type:
Newspaper
System:
The Portal to Texas History
Carbon Sequestration on Surface Mine Lands
The first quarter of 2004 was dedicated to tree planting activities in two locations in Kentucky. During the first year of this project there was not available mine land to plant in the Hazard area, so 107 acres were planted in the Martin County mine location. This year 120 acres were planted in the Hazard area to compensate for the prior year and an additional 57 acres were planted on Peabody properties in western Kentucky. Additional sets of special plots were established on each of these areas that contained 4800 seedlings each for carbon sequestration demonstrations. Plantings were also conducted to continue compaction and water quality studies on the newly established areas as well as continual measurements of the first year's plantings. Total plantings on this project now amount to 357 acres containing 245,960 seedlings. During the second quarter of this year monitoring systems were established for all the new research areas. Weather data pertinent to the research as well as hydrology and water quality monitoring continues to be conducted on all areas. Studies established to assess specific questions pertaining to carbon flux and the invasion of the vegetation by small mammals are being quantified. Experimental practices initiated with this …
Date:
November 30, 2004
Creator:
Graves, Donald H.; Barton, Christopher; Koo, Bon Jun; Sweigard, Richard & Warner, Richard
Object Type:
Report
System:
The UNT Digital Library
Carbon Sequestration on Surface Mine Lands Quarterly Report
A monitoring program to measure treatment effects on above ground, and below ground carbon and nitrogen pools for the planting areas is being conducted. The collection of soil and tissue samples from both the 2003 and 2004 plantings is complete and are currently being processed in the laboratory. Detailed studies have been initiated to address specific questions pertaining to carbon cycling. Examinations of decomposition and heterotropic respiration on carbon cycling in the reforestation plots were continued during this reporting period. A whole-tree harvesting method was employed to evaluate carbon accumulation as a function of time on the mined site. The trees were extracted from the sites and separated into the following components: foliage, stems, branches, and roots.
Date:
November 30, 2004
Creator:
Graves, Donald H.; Barton, Christopher; Sweigard, Richard & Warner, Richard
Object Type:
Report
System:
The UNT Digital Library
CHARACTERIZATION OF THE LOCAL TITANIUM ENVIRONMENT IN DOPED SODIUM ALUMINUM HYDRIDE USING X-RAY ADSORPTION SPECTROSCOPY.
Ti K-edge x-ray absorption spectroscopy was used to explore the local titanium environment and valence in 2-4 mol% Ti-doped sodium alanate. An estimate of the oxidation state of the dopant, based upon known standards, revealed a zero-valent titanium atom. An analysis of the near-edge and extended fine structures indicates that the Ti does not enter substitutional or interstitial sites in the NaAlH{sub 4} lattice. Rather, the Ti is located on/near the surface and is coordinated by 10.2 {+-} 1 aluminum atoms with an interatomic distance of 2.82 {+-} 0.01 {angstrom}, similar to that of TiAl{sub 3}. The Fourier transformed EXAFS spectra reveals a lack of long-range order around the Ti dopant indicating that the Ti forms nano-clusters of TiAl{sub 3}. The similarity of the spectra in the hydrided and dehydrided samples suggests that the local Ti environment is nearly invariant during hydrogen cycling.
Date:
November 30, 2004
Creator:
Graetz, J.; Ignatov, A. Yu; Tyson, T. A.; Reilly, J. J. & Johnson, J.
Object Type:
Article
System:
The UNT Digital Library
Clean Air Act Issues in the 108th Congress
This report details the most prominent air quality issues in the 108th Congress and discusses about clean air act issues.
Date:
November 30, 2004
Creator:
McCarthy, James E.
Object Type:
Report
System:
The UNT Digital Library
Commonly Used Motions and Requests in the House of Representatives
This report identifies the most commonly used motions and requests available to Members during proceedings in the House of Representatives. The report divides the motions and requests into seven broad categories, based on when the motion or request is in order and who can make the motion or request. Daily Business is the category that includes items that are routine to the conduct of business in the House each day, such as the motion to adjourn. Decorum and Privilege covers issues of the rights and privileges of Members and the House and how Members conduct themselves on the floor.
Date:
November 30, 2004
Creator:
Palmer, Betsy
Object Type:
Report
System:
The UNT Digital Library
Continuing Appropriations Acts: Brief Overview of Recent Practices
This report is divided into two segments. The first segment provides the most recent developments regarding the FY2005 continuing resolutions (CRs). The second segment provides information on the history of CRs; the nature, scope, and duration of CRs during the last 30 years; the various types of CRs that have been enacted; and an overview of those instances when budget authority has lapsed and a funding gap has resulted.
Date:
November 30, 2004
Creator:
Streeter, Sandy
Object Type:
Report
System:
The UNT Digital Library
CROSS-ROLL FLOW FORMING OF ODS ALLOY HEAT EXCHANGER TUBES FOR HOOP CREEP ENHANCEMENT
Mechanically alloyed oxide dispersion strengthened (ODS) Fe-Cr-Al alloy thin walled tubes and sheets, produced via powder processing and consolidation methodologies, are promising materials for eventual use at temperatures up to 1200 C in the power generation industry, far above the temperature capabilities of conventional alloys. Target end-uses range from gas turbine combustor liners to high aspect ratio (L/D) heat exchanger tubes. Grain boundary creep processes at service temperatures, particularly those acting in the hoop direction, are the dominant failure mechanisms for such components. The processed microstructure of ODS alloys consists of high aspect ratio grains aligned parallel to the tube axis, a result of dominant axial metal flow which aligns the dispersoid particles and other impurities in the longitudinal direction. The dispersion distribution is unaltered on a micro scale by recrystallization thermal treatments, but the high aspect ratio grain shape typically obtained limits transverse grain spacing and consequently the hoop creep response. Improving hoop creep in ODS-alloy components will require understanding and manipulating the factors that control the recrystallization behavior, and represents a critical materials design and development challenge that must be overcome in order to fully exploit the potential of ODS alloys. The objectives of this program are to …
Date:
November 30, 2004
Creator:
Kad, Bimal K.
Object Type:
Report
System:
The UNT Digital Library
Desorption/Ionization Fluence Thresholds and Improved Mass Spectral Consistency Measured Using a Flattop Laser Profile in the Bioaerosol Mass Spectrometry of Single Bacillus Endospores
Bioaerosol mass spectrometry (BAMS) is being developed to analyze and identify biological aerosols in real-time. Mass spectra of individual Bacillus endospores were measured here with a bipolar aerosol time-of-flight mass spectrometer in which molecular desorption and ionization were produced using a single laser pulse from a Q-switched, frequency-quadrupled Nd:YAG laser that was modified to have an approximately flattop profile. The flattened laser profile allowed the minimum fluence required to desorb and ionize significant numbers of ions from single aerosol particles to be determined. For Bacillus spores this threshold had a mean value of approximately 1 nJ/{micro}m{sup 2} (0.1 J/cm{sup 2}). Thresholds for individual spores, however, could apparently deviate by 20% or more from the mean. Threshold distributions for clumps of MS2 bacteriophage and bovine serum albumin were subsequently determined. Finally, the flattened profile was observed to increase the reproducibility of single spore mass spectra. This is consistent with the general conclusions of our earlier paper on the fluence dependence of single spore mass spectra and is particularly significant because it is expected to enable more robust differentiation and identification of single bioaerosol particles.
Date:
November 30, 2004
Creator:
Steele, P T; Srivastava, A; Pitesky, M E; Fergenson, D P; Tobias, H J; Gard, E E et al.
Object Type:
Article
System:
The UNT Digital Library
Development of a Novel Tunable X-Ray Source for the RPI-LINAC
This document summarizes the results of a three year effort to develop a parametric x-ray (PXR) source. The emphasis of this research was to demonstrate production of high yield monoenergetic x-rays. Production of PXR is accomplished by placing a crystal in a relativistic electron beam. The process was first demonstrated in 1985 in Russia. Numerous papers were written about the characteristics of PXR from both experimental and theoretical perspectives. The advantage of PXR over other monoenergetic x-ray sources is that it is produced at large angle relative to the electron beam and at high intensity. None of the previous work described in the literature capitalized on this effect to study what is required in order to generate an effective monoenergetic x-ray source that can be used for practical applications. The work summarized here describes the process done in order to optimize the PXR production process by selecting an appropriate crystal and the optimal conditions. The research focused on production of 18 keV x-rays which are suitable for mammography however the results are not limited to this application or energy range. We are the first group to demonstrate x-ray imaging using PXR. Such sources can improve current medical imaging modalities. More …
Date:
November 30, 2004
Creator:
Danon, Y. & Block, R. C.
Object Type:
Report
System:
The UNT Digital Library
Development of Improved Sorbents for Radiochemical Separations at the SRS
High-level nuclear waste produced from fuel reprocessing operations at the Savannah River Site (SRS) requires pretreatment to remove {sup 137}Cs, {sup 90}Sr and alpha-emitting radionuclides (i.e., actinides) prior to disposal. Separation processes planned at SRS include caustic side solvent extraction, for {sup 137}Cs removal, and ion exchange/sorption of {sup 90}Sr and alpha-emitting radionuclides with monosodium titanate (MST). The predominant alpha-emitting radionuclides in the highly alkaline waste solutions include plutonium isotopes {sup 238}Pu, {sup 239}Pu and {sup 240}Pu. This paper describes results from a project to produce sorbents that exhibit increased removal kinetics and capacity for {sup 90}Sr and alpha-emitting radionuclides versus that of the baseline MST material. Testing indicated that MST samples prepared in the presence of organic-based templating agents showed limited improvements in performance compared to the baseline MST. We observed significantly improved plutonium and neptunium removal performance with MST samples prepared upon the addition of a proprietary reagent. The modified MST offers the possibility of increased throughput and reduced solids handling in waste processing facilities at the SRS.
Date:
November 30, 2004
Creator:
Hobbs, David T.; Nyman, M. D.; Tripathi, A.; Medvedev, D. & Clearfield, A.
Object Type:
Article
System:
The UNT Digital Library
Effective Operators in the NCSM Formalism
No-core shell model (NCSM) calculations using ab initio effective interactions are very successful in reproducing the experimental nuclear spectra. While a great deal of work has been directed toward computing effective interactions from bare nucleon-nucleon (NN) and three-nucleon forces, less progress has been made in calculating the effective operators. Thus, except for the relative kinetic energy, the proton radius, and the NN pair density, all investigations have used bare operators. We apply the Lee-Suzuki procedure to general two-body operators, investigating the importance of the approximations involved. In particular we concentrate on the limitations of the two-body cluster approximation.
Date:
November 30, 2004
Creator:
Stetcu, I; Barrett, B R; Navratil, P & Vary, J P
Object Type:
Article
System:
The UNT Digital Library
Effective Operators Within the Ab Initio No-Core Shell Model
We implement an effective operator formalism for general one- and two-body operators, obtaining results consistent with the no-core shell model (NCSM) wave functions. The Argonne V8' nucleon-nucleon potential was used in order to obtain realistic wave functions for {sup 4}He, {sup 6}Li and {sup 12}C. In the NCSM formalism, we compute electromagnetic properties using the two-body cluster approximation for the effective operators and obtain results which are sensitive to the range of the bare operator. To illuminate the dependence on the range, we employ a Gaussian two-body operator of variable range, finding weak renormalization of long range operators (e.g., quadrupole) in a fixed model space. This is understood in terms of the two-body cluster approximation which accounts mainly for short-range correlations. Consequently, short range operators, such as the relative kinetic energy, will be well renormalized in the two-body cluster approximation.
Date:
November 30, 2004
Creator:
Stetcu, I; Barrett, B R; Navratil, P & Vary, J P
Object Type:
Article
System:
The UNT Digital Library
Effects of Oxide Film on the Corrosion Resistance of Titanium Grade 7 in Fluoride-Containing NaCl Brines
The effects of oxide film on the corrosion behavior of Titanium Grade 7 (0.12-0.25% Pd) in fluoride-containing NaCl brines have been investigated. With the presence of a 0.6 {micro}m thick oxide layer, the annealed Ti grade 7 exhibited a significant improvement on the anodic polarization behavior. However, the oxide film did not demonstrate sustainable corrosion resistance in fluoride-containing solutions.
Date:
November 30, 2004
Creator:
Lian, T; Whalen, M T & Wong, L
Object Type:
Article
System:
The UNT Digital Library
Energy Efficiency of the 2000 International Energy Conservation Code in West Virginia
The West Virginia State Building Code contains two options for energy efficiency requirements in one- and two-family dwellings. One is the International Code Council?s (ICC) 2000 International Energy Conservation Code (IECC) (ICC 1999a,b) (87-4-4.1.6). The second is an exception (replacement) for Chapter 11 of the ICC International Residential Code (IRC) (87-4-4.1.7). The West Virginia Energy Efficiency Program, West Virginia Development Office, has asked the U.S. Department of Energy (DOE) to compare the energy use resulting from the application of the 2000 IECC code and the IRC code, as amended by West Virginia. The Department's Pacific Northwest National Laboratory (PNNL) compared the energy use from compliance with the 2000 IECC to the exception to Chapter 11 of the IRC known as the ''Alternate Energy Code''.
Date:
November 30, 2004
Creator:
Lucas, Robert G.
Object Type:
Report
System:
The UNT Digital Library
Ensemble: 2004-11-30 – Center for Chamber Music Studies
Access:
Use of this item is restricted to the UNT Community
Chamber Music Ensembles recital performed at the UNT College of Music Winspear Performance Hall.
Date:
November 30, 2004
Creator:
Center for Chamber Music Studies
Object Type:
Sound
System:
The UNT Digital Library
Ensemble: 2004-11-30 – Collegium Singers and Baroque Orchestra
Performance of the Collegium Singers and Baroque Orchestra at the UNT College of Music Recital Hall.
Date:
November 30, 2004
Creator:
University of North Texas. Collegium Singers.
Object Type:
Sound
System:
The UNT Digital Library