Partner
UNT Libraries Government Documents Department
1,254
Oklahoma Historical Society
113
UNT Libraries
74
UNT Libraries Special Collections
72
National Museum of the Pacific War/Admiral Nimitz Foundation
32
Sterling Municipal Library
31
San Antonio Public Library
16
Alvin Community College
14
Lee College
13
Carl Albert Congressional Research and Studies Center
10
61 More
Collection
Office of Scientific & Technical Information Technical Reports
801
Congressional Research Service Reports
356
Texas Digital Newspaper Program
311
Tocker Foundation Grant
135
Oklahoma Digital Newspaper Program
125
The Greensheet
61
Government Accountability Office Reports
36
National Museum of the Pacific War Oral History Collection
32
National Museum of the Pacific War Digital Archive
32
The Baytown Sun
31
111 More
Country
States
Year
Month
Language
1,844 Matching Results
Results open in a new window/tab.
Biomolecular decision-making process for self assembly.
The brain is often identified with decision-making processes in the biological world. In fact, single cells, single macromolecules (proteins) and populations of molecules also make simple decisions. These decision processes are essential to survival and to the biological self-assembly and self-repair processes that we seek to emulate. How do these tiny systems make effective decisions? How do they make decisions in concert with a cooperative network of other molecules or cells? How can we emulate the decision-making behaviors of small-scale biological systems to program and self-assemble microsystems? This LDRD supported research to answer these questions. Our work included modeling and simulation of protein populations to help us understand, mimic, and categorize molecular decision-making mechanisms that nonequilibrium systems can exhibit. This work is an early step towards mimicking such nanoscale and microscale biomolecular decision-making processes in inorganic systems.
Date:
January 1, 2005
Creator:
Osbourn, Gordon Cecil
Object Type:
Report
System:
The UNT Digital Library
Border Business Indicators, Volume 29, Number 1, January 2005
Monthly publication documenting statistics related to economic information in the Mexico-Texas border areas including types of border crossings, employment, customs revenues, and other related data.
Date:
January 2005
Creator:
Texas Center for Border Economic and Enterprise Development
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Building America Research Benchmark Definition, Version 3.1, Updated July 14, 2004
To track progress toward aggressive multi-year whole-house energy savings goals of 40-70% and onsite power production of up to 30%, the U.S. Department of Energy (DOE) Residential Buildings Program and the National Renewable Energy Laboratory (NREL) developed the Building America Research Benchmark in consultation with the Building America industry teams. The Benchmark is generally consistent with mid-1990s standard practice, as reflected in the Home Energy Rating System (HERS) Technical Guidelines (RESNET 2002), with additional definitions that allow the analyst to evaluate all residential end-uses, an extension of the traditional HERS rating approach that focuses on space conditioning and hot water. A series of user profiles, intended to represent the behavior of a ''standard'' set of occupants, was created for use in conjunction with the Benchmark.
Date:
January 1, 2005
Creator:
Hendron, R.
Object Type:
Report
System:
The UNT Digital Library
Calcine Waste Storage at the Idaho Nuclear Technology and Engineering Center
This report documents an inventory of calcined waste produced at the Idaho Nuclear Technology and Engineering Center during the period from December 1963 to May 2000. The report was prepared based on calciner runs, operation of the calcined solids storage facilities, and miscellaneous operational information that establishes the range of chemical compositions of calcined waste stored at Idaho Nuclear Technology and Engineering Center. The report will be used to support obtaining permits for the calcined solids storage facilities, possible treatment of the calcined waste at the Idaho National Engineering and Environmental Laboratory, and to ship the waste to an off-site facility including a geologic repository. The information in this report was compiled from calciner operating data, waste solution analyses and volumes calcined, calciner operating schedules, calcine temperature monitoring records, and facility design of the calcined solids storage facilities. A compact disk copy of this report is provided to facilitate future data manipulations and analysis.
Date:
January 1, 2005
Creator:
Staiger, Merle Daniel & Swenson, M. C.
Object Type:
Report
System:
The UNT Digital Library
Carbon Dioxide Capture From Flue Gas Using Dry Regenerable Sorbents Quarterly Technical Progress Report: October-December 2004
This report describes research conducted between October 1, 2004 and December 31, 2004 on the use of dry regenerable sorbents for removal of carbon dioxide from flue gas. Two supported sorbents were tested in a bench scale fluidized bed reactor system. The sorbents were prepared by impregnation of sodium carbonate on to an inert support at a commercial catalyst manufacturing facility. One sorbent, tested through five cycles of carbon dioxide sorption in an atmosphere of 3% water vapor and 0.8 to 3% carbon dioxide showed consistent reactivity with sodium carbonate utilization of 7 to 14%. A second, similarly prepared material, showed comparable reactivity in one cycle of testing. Batches of 5 other materials were prepared in laboratory scale quantities (primarily by spray drying). These materials generally have significantly greater surface areas than calcined sodium bicarbonate. Small scale testing showed no significant adsorption of mercury on representative carbon dioxide sorbent materials under expected flue gas conditions.
Date:
January 1, 2005
Creator:
Green, David A.; Turk, Brian S.; Portzer, Jeffrey W.; Nelson, Thomas & Gupta, Raghubir P.
Object Type:
Report
System:
The UNT Digital Library
Carbon Dioxide Flux Measurement Systems (CO2Flux) Handbook
The Southern Great Plains (SGP) carbon dioxide flux (CO2 flux) measurement systems provide half-hour average fluxes of CO2, H2O (latent heat), and sensible heat. The fluxes are obtained by the eddy covariance technique, which computes the flux as the mean product of the vertical wind component with CO2 and H2O densities, or estimated virtual temperature. A three-dimensional sonic anemometer is used to obtain the orthogonal wind components and the virtual (sonic) temperature. An infrared gas analyzer is used to obtain the CO2 and H2O densities. A separate sub-system also collects half-hour average measures of meteorological and soil variables from separate 4-m towers.
Date:
January 1, 2005
Creator:
Fischer, M
Object Type:
Report
System:
The UNT Digital Library
Carbon Sequestration in Reclaimed Mined Soils of Ohio
Assessment of soil organic carbon (SOC) sequestration potential of reclaimed minesoils (RMS) is important for preserving environmental quality and increasing agronomic yields. The experimental sites were characterized by distinct age chronosequences of reclaimed minesoil and were located in Guernsey, Morgan, Noble, and Muskingum Counties of Ohio. These sites are owned and maintained by Americal Electrical Power. These sites were reclaimed (1) with topsoil application, and (2) without topsoil application, and were under continuous grass or forest cover. In this report results are presented from the sites reclaimed without topsoil application between 1956 and 1969. Three sites are under continuous grass cover and the three under forest cover since reclamation. Three core and three bulk soil samples were collected from each site from three slope positions (upper; middle, and lower) for 0-15 cm and 15-30 cm depths, and texture, pH and electrical conductivity (EC), soil bulk density ({rho}{sub b}), SOC, total nitrogen (TN) stocks were determined. No differences in sand and clay contents, bulk density, SOC and TN stocks were observed within different slope positions within each site. However, sand [R56-G (17.1%) < R69-G (29.1%) = R62-G (29.1%)], and silt [R56-G (58.3%) > R69-G (47.7%)] contents, bulk density [R62-G (1.25 Mg …
Date:
January 1, 2005
Creator:
Shukla, M.K. & Lal, R.
Object Type:
Report
System:
The UNT Digital Library
Catalyst Additives to Enhance Mercury Oxidation and Capture Quarterly Report: October - December 2004
Preliminary research has shown that SCR catalysts employed for nitrogen-oxide reduction can effectively oxidize mercury. This report discusses initial results from fundamental investigations into the behavior of mercury species in the presence of SCR catalysts at Southern Research Institute. Three different SCR catalysts are being studied. These are honeycomb-type, plate-type, and a hybrid-type catalyst. The catalysts are manufactured and supplied by Cormetech Inc., Hitachi America Ltd., and Haldor-Topsoe Inc., respectively. Test methods and experimental procedures were developed for current and future testing. The methods and procedures equalize factors influencing mercury adsorption and oxidation (surface area, catalyst activity, and pore structure) that normally differ for each catalyst type. Initial testing was performed to determine the time necessary for each catalyst to reach surface-adsorption equilibrium. In addition, the fraction of Hg oxidized by each of the SCR catalyst types is being investigated, for a given amount of catalyst and flow rate of mercury and flue gas. The next major effort will be to examine the kinetics of mercury oxidation across the SCR catalysts with respect to changes in mercury concentration and with respect to HCl concentration. Hg-sorption equilibrium times will also be investigated with respect to ammonia concentration in the simulated flue …
Date:
January 2005
Creator:
Cannon, Jared W. & Gale, Thomas K.
Object Type:
Report
System:
The UNT Digital Library
Causes and prevention of symptom complaints in office buildings:Distilling the experience of indoor environmental qualityinvestigators
The goal of this project was to develop empirically based recommendations for practical strategies, suitable for use by those who own, lease, or manage office space, to prevent building-related symptoms in office buildings. Ideas from six experienced building investigators were gathered and prioritized in a multi-day workshop. The top ranked problems identified were, in priority order: excessive building moisture, inadequate outdoor air, dust on indoor surfaces, indoor gases and odors, inadequate thermal control, and inadequate attention by management to indoor environments. The highest priority strategies recommended for preventing building-related symptoms were: managing water at building exteriors, operating ventilation systems per design intent, providing at least minimum ventilation rates, and maintaining indoor temperatures at 72 F {+-} 2{sup o}. Findings in the scientific literature were generally consistent with these recommendations. IEQ investigators showed considerable agreement on the most important causes of symptom complaints in office buildings and the key methods for preventing these problems. Despite the range of climates in which they worked, the investigators agreed that the highest priority prevention strategy was managing water at building exteriors. These recommendations, generally consistent with available research findings, provide useful practical guidelines for those who own, manage or maintain office buildings. The empirical …
Date:
January 1, 2005
Creator:
Mendell, Mark J.; Diamond, Richard C.; Fisk, William J.; Brennan,Terry; Hathon, Lee; Odom, J. David et al.
Object Type:
Article
System:
The UNT Digital Library
CERAMIC MEMBRANE ENABLING TECHNOLOGY FOR IMPROVED IGCC EFFICIENCY
This quarterly technical progress report will summarize work accomplished for Phase 2 Program during the quarter April to June 2004. In task 7, reactor cost analysis was performed to determine whether OTM technology when integrated with IGCC provides a commercially attractive process. In task 9, discussions with DOE regarding restructuring the program continued. The objectives of the second year of phase 2 of the program are to construct and operate an engineering pilot reactor for OTM oxygen. Work to support this objective is being undertaken in the following areas in this quarter: IGCC process analysis and economics.
Date:
January 1, 2005
Creator:
Sirman, John
Object Type:
Report
System:
The UNT Digital Library
Characterization of Photovoltaic Concentrators
This paper will describe the resources at the National Renewable Energy Laboratory (NREL) for performing characterization of photovoltaic (PV) materials designed for operation under concentrated light. NREL has the capability to measure devices ranging from very small, unencapsulated research cells to reasonably sized, environmentally protected modules. Data gathering and interpretation are also ongoing areas of revision and improvement. The main goal of the current research is to reduce the measurement uncertainty to the lowest practical value. At present, the state of the art is limited at a ?5% level in measuring efficiency accurately.
Date:
January 1, 2005
Creator:
Kiehl, J. & Emery, E.
Object Type:
Article
System:
The UNT Digital Library
Characterizing the effects of scale and heating rate on micro-scale explosive ignition criteria.
Laser diode ignition experiments were conducted in an effort to characterize the effects of scale and heating rate on micro-scale explosive ignition criteria. Over forty experiments were conducted with various laser power densities and laser spot sizes. In addition, relatively simple analytical and numerical calculations were performed to assist with interpretation of the experimental data and characterization of the explosive ignition criteria.
Date:
January 1, 2005
Creator:
Hafenrichter, Everett Shingo & Pahl, Robert J.
Object Type:
Report
System:
The UNT Digital Library
Charm and beauty production at CDF
Using the data samples collected with the CDF Run II detector during 2002 and early 2003, new measurements of the production cross sections of charm and beauty hadrons at {radical}s = 1960 GeV are presented. New measurements of the cross sections of centrally produced b-hadrons and J/{psi} mesons down to zero transverse momenta have been carried out. The large charm signals made available by the silicon vertex track trigger have enabled the measurement of the cross sections of D{sup 0}, D*, D{sup {+-}}, and D{sub s} mesons.
Date:
January 1, 2005
Creator:
Bishai, M.
Object Type:
Article
System:
The UNT Digital Library
Children with Special Health Care Needs: Newsletter for Families, January 2005
Bilingual newsletter from the Texas Department of State Health Services providing information on health care for children with special needs, including resources for medical help and community services.
Date:
January 2005
Creator:
Texas. Department of State Health Services.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Chilled Mirror Dew Point Hygrometer (CM) Handbook
The CM systems have been developed for the ARM Program to act as a moisture standard traceable to National Institute of Standards and Technology (NIST). There are three CM systems that are each fully portable, self-contained, and require only 110 V AC power. The systems include a CM sensor, air sampling and filtration system, a secondary reference (Rotronic HP043 temperature and relative humidity sensor) to detect system malfunctions, a data acquisition system, and data storage for more than one month of 1-minute data. The CM sensor directly measures dew point temperature at 1 m, air temperature at 2 m, and relative humidity at 2 m. These measurements are intended to represent self-standing data streams that can be used independently or in combinations.
Date:
January 1, 2005
Creator:
Ritsche, MT
Object Type:
Report
System:
The UNT Digital Library
The Christian Chronicle (Oklahoma City, Okla.), Vol. 62, No. 1, Ed. 1, January 2005
Monthly newspaper from Oklahoma City, Oklahoma that includes news and information about the Churches of Christ along with advertising.
Date:
January 2005
Creator:
McBride, Bailey
Object Type:
Newspaper
System:
The Portal to Texas History
Church & Synagogue Libraries, Volume 38, Number 1, January/February 2005
Bimonthly publication of the Church and Synagogue Library Association, containing news and events related to the organization and its members, reviews of books and other materials, and stories of interest to the management of congregational libraries.
Date:
January 2005
Creator:
Church and Synagogue Library Association
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
CIGS Thin-Film Solar Cell Research at NREL: FY04 Results and Accomplishments
This short paper is a summary of our investigations in three major areas: high-efficiency CuInGaSe2 (CIGS) solar cells, junctions made using chemical bath deposited ZnS(O,OH) buffer layers, and solar cells fabricated from thinner absorbers. Significant progress was made in all areas. We describe how our research has contributed to the fundamental understanding and the practical application of CIGS materials to high performance solar cells.
Date:
January 1, 2005
Creator:
Ramanathan, K.; Bhattacharya, R. N.; Contreras, M. A.; Hasoon, F. S.; Abushama, J. & Noufi, R.
Object Type:
Article
System:
The UNT Digital Library
CITRIC ACID AS A SET RETARDER FOR CALCIUM ALUMINATE PHOSPHATE CEMENTS.
Citric acid added as set retarder significantly contributed to enhancing the setting temperature and to extending the thickening time of a calcium aluminate phosphate (CaP) geothermal cement slurry consisting of calcium aluminate cement (CAC) as the base reactant and sodium polyphosphate (NaP) solution as the acid reactant. The set-retarding activity of citric acid was due to the uptake of Ca{sup 2+} ions from the CAC by carboxylic acid groups within the citric acid. This uptake led to the precipitation of a Ca-complexed carboxylate compound as a set-retarding barrier layer on the CAC grains' surfaces. However, this barrier layer was vulnerable to disintegration by the attack of free Ca{sup 2+} ions from CAC, and also to degradation at elevated temperature, thereby promoting the generation of exothermic energy from acid-base reactions between the CAC and NaP after the barrier was broken. The exothermic reaction energy that was promoted in this way minimized the loss in strength of the citric acid-retarded cement. The phase composition assembled in both retarded and non-retarded cements after autoclaving at 180 C encompassed three reaction products, hydroxyapatite (HOAp), hydrogrossular and boehmite, which are responsible for strengthening the autoclaved cement. The first two reaction products were susceptible to reactions …
Date:
January 1, 2005
Creator:
SUGAMA,T. & BROTHERS, L. E.
Object Type:
Report
System:
The UNT Digital Library
Clean Cities Around the World
This 2-page fact sheet provides general information regarding Clean Cities International, including background, successful activities, importance of partnerships, accomplishments, and plans.
Date:
January 1, 2005
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
Clean Cities Fact Sheet
This is a routine revision of a general fact sheet that describes the Clean Cities partnership efforts and includes a list of Clean Cities coordinators.
Date:
January 1, 2005
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
Cold-Climate Solar Domestic Hot Water Systems: Cost/Benefit Analysis and Opportunities for Improvement
To determine potential for reduction in the cost of saved energy (COSE) for cold-climate solar domestic hot water (SDHW) systems, COSE was computed for three types of cold climate water heating systems. For each system, a series of cost-saving measures was considered: (1) balance of systems (BOS): tank, heat exchanger, and piping-valving measures; and (2) four alternative lower-cost collectors. Given all beneficial BOS measures in place, >50% reduction of COSE was achievable only with selective polymer collectors at half today's selective collector cost. In all three system types, today's metal-glass selective collector achieved the same COSE as the hypothesized non-selective polymer collector.
Date:
January 1, 2005
Creator:
Burch, J.; Hillman, T. & Salasovich, J.
Object Type:
Article
System:
The UNT Digital Library
Collective instabilities in the Tevatron Complex
Although the luminosity growth for Tevatron Run II was slower than expected, steady growth of luminosity has been demonstrated during the last three years with the peak luminosity of 1.02 x 10{sup 32} cm{sup -2} s{sup -1} achieved in July 2004. Suppression of instabilities has been a valuable contributor to the luminosity growth. This report discusses the transverse instabilities in the Tevatron and Recycler.
Date:
January 1, 2005
Creator:
Lebedev, V. & Burov, A.
Object Type:
Article
System:
The UNT Digital Library
Comments on Landau damping due to synchrotron frequency spread
An inductive/space-charge impedance shifts the synchrotron frequency downwards above/below transition, but it is often said that the coherent synchrotron frequency of the bunch is not shifted in the rigid-dipole mode. On the other hand, the incoherent synchrotron frequency due to the sinusoidal rf always spreads in the downward direction. This spread will therefore not be able to cover the coherent synchrotron frequency, implying that there will not be any Landau damping no matter how large the frequency spread is. By studying the dispersion relation, it is shown that the above argument is incorrect, and there will be Landau damping if there is sufficient frequency spread. The main reason is that the coherent frequency of the rigid-dipole mode will no longer remain unshifted in the presence of a synchrotron frequency spread.
Date:
January 1, 2005
Creator:
Ng, K. Y.
Object Type:
Report
System:
The UNT Digital Library