Partner
Oklahoma Historical Society
523
UNT Libraries Government Documents Department
276
Sterling Municipal Library
119
UNT Libraries
80
Swisher County Library
51
Sanger Public Library
50
Upshur County Library
36
Singletary Memorial Library
34
Tarrant County College NE, Heritage Room
28
Reagan County Library
26
67 More
Collection
Texas Digital Newspaper Program
750
Oklahoma Digital Newspaper Program
557
Tocker Foundation Grant
401
Office of Scientific & Technical Information Technical Reports
210
Chickasha Newspaper Collection
147
Sapulpa Herald
119
Sapulpa Area Newspaper Collection
119
The Baytown Sun
118
Altus Times-Democrat
77
Tulia Herald
51
120 More
Degree Department
Department of Counseling, Development and Higher Education
5
Department of Teacher Education and Administration
5
Department of Psychology
3
Department of Biological Sciences
2
Department of Biology
2
Center for Advanced Scientific Computing and Modeling
1
Chemistry
1
Department of Behavior Analysis
1
Department of Counselor Education
1
Department of English
1
6 More
Degree Discipline
Degree Level
Country
Year
Month
Language
1,669 Matching Results
Results open in a new window/tab. Unexpected Results? Search the Catalog Instead.
Solar powered hydrogen generating facility and hydrogen powered vehicle fleet. Final technical report, August 11, 1994--January 6, 1997
This final report describes activities carried out in support of a demonstration of a hydrogen powered vehicle fleet and construction of a solar powered hydrogen generation system. The hydrogen generation system was permitted for construction, constructed, and permitted for operation. It is not connected to the utility grid, either for electrolytic generation of hydrogen or for compression of the gas. Operation results from ideal and cloudy days are presented. The report also describes the achievement of licensing permits for their hydrogen powered trucks in California, safety assessments of the trucks, performance data, and information on emissions measurements which demonstrate performance better than the Ultra-Low Emission Vehicle levels.
Date:
April 1, 1997
Creator:
Provenzano, J.J.
Object Type:
Report
System:
The UNT Digital Library
Systems study of drilling for installation of geothermal heat pumps
Geothermal, or ground-source, heat pumps (GHP) are much more efficient than air-source units such as conventional air conditioners. A major obstacle to their use is the relatively high initial cost of installing the heat-exchange loops into the ground. In an effort to identify drivers which influence installation cost, a number of site visits were made during 1996 to assess the state-of-the-art in drilling for GHP loop installation. As an aid to quantifying the effect of various drilling-process improvements, we constructed a spread-sheet based on estimated time and material costs for all the activities required in a typical loop-field installation. By substituting different (improved) values into specific activity costs, the effect on total project costs can be easily seen. This report contains brief descriptions of the site visits, key points learned during the visits, copies of the spread-sheet, recommendations for further work, and sample results from sensitivity analysis using the spread-sheet.
Date:
September 1, 1997
Creator:
Finger, J. T.; Sullivan, W. N.; Jacobson, R. D. & Pierce, K. G.
Object Type:
Report
System:
The UNT Digital Library
Logs and completion data for water and mass balance wells in Mortandad and Ten Site Canyons
Twenty-four monitoring wells were drilled and completed in December 1994 as part of a water and mass balance study for the shallow perched aquifer in the Mortandad Canyon alluvium and in the lower part of Ten-Site Canyon. The wells penetrated the alluvium containing the aquifer and were completed into the top of the weathered tuff. Twelve of these wells encountered the Tshirege Member (Cooing Unit 1 g) of the Bandelier Tuff below the canyon alluvium, while ten wells made contact with the Cerro Toledo interval, which lies between the Tshirege and Otowi Members of the Bandelier Tuff. The remaining two wells were completed into the alluvium above the weathered tuff contact. These wells provide access for continuous water level measurement and water sampling. Data from these new wells will be used to determine changes in alluvial aquifer water storage, water quality sampling, and estimation of seepage into the unsaturated Bandelier Tuff below the alluvium. This report documents drilling activities and well completion logs for the water and mass balance study. These wells also provide critical new data for fourteen north-south vertical cross-sections constructed for the canyon alluvium.
Date:
October 1, 1997
Creator:
McLin, S. G.; Purtymun, W. D.; Swanton, A. S. & Koch, R. J.
Object Type:
Report
System:
The UNT Digital Library
Final report on LDRD Project: In situ determination of composition and strain during MBE
Molecular Beam Epitaxy (MBE) of semiconductor heterostructures for advanced electronic and opto-electronic devices requires precise control of the surface composition and strain. The development of advanced in situ diagnostics for real-time monitoring and process control of strain and composition would enhance the yield, reliability and process flexibility of material grown by MBE and benefit leading-edge programs in microelectronics and photonics. The authors have developed a real-time laser-based technique to measure the evolution of stress in epitaxial films during growth by monitoring the change in the wafer curvature. Research has focused on the evolution of stress during the epitaxial growth of Si{sub x}Ge{sub 1{minus}x} alloys on Si(001) substrates. Initial studies have observed the onset and kinetics of strain relaxation during the growth of heteroepitaxial layers. The technique has also been used to measure the segregation of Ge to the surface during alloy growth with monolayer sensitivity, an order of magnitude better resolution than post-growth characterization. In addition, creation of a 2-dimensional array of parallel beams allows rapid surface profiling of the film stress that can be used to monitor process uniformity.
Date:
February 1, 1997
Creator:
Chason, E.; Floro, J.A.; Reno, J. & Klem, J.
Object Type:
Report
System:
The UNT Digital Library
Fundamental Kinetics of Supercritical Coal Liquefaction: Effect of Catalysts and Hydrogen-Donor Solvents.
Most research on polymer degradation is for single polymers, even though the thermal decomposition of polymer mixtures is of interest both practically and theoretically. Polymer degradation rates depend on the mixture type, and adding a polymer can increase, decrease, or leave unchanged the degradation rate of the first polymer. We show how distribution-kinetics theory, based on molecular-weight distributions (MWDs), provides expressions for degradation rates of binary polymer mixtures. The approach accounts for initiation, termination, hydrogen abstraction, and radical chain scission in the governing equations for MWDS. Molecular-weight moments yield expressions for molar and mass concentrations and rate coefficients for combinations of random and chain-end scission. Experimental data show the concentration effect of poly((x-methyl styrene)) (PAMS) on the degradation of polystyrene dissolved in mineral oil at 275 {degrees}C in a batch reactor. Samples analyzed by gel permeation chromatography yielded the time evolution of the MD. The results indicated that, owing to the interaction of mixed radicals with polymer by hydrogen abstraction, polystyrene degradation rate decreases with increasing PAMS concentration.
Date:
July 21, 1997
Creator:
McCoy, B. J. & Smith, J. M.
Object Type:
Report
System:
The UNT Digital Library
Magnets for the national spallation neutron source accumulator ring
The National Spallation Neutron Source Accumulator Ring will require large aperture dipole magnets, strong focusing quadrupole magnets, and smaller low field dipole, quadrupole, and sextupole correcting magnets. All of the magnets will provide a fixed magnetic field throughout the accumulator`s fill/storage/extraction cycle. Similar fixed field magnets will also be provided for the beam transport systems. Because of the high intensity in the accumulator, the magnets must be designed with high tolerances for optimum field quality and for the high radiation environment which may be present at the injection/extraction areas, near the collimators, and near the target area. Field specifications and field plots are presented as well as planned fabrication methods and procedures, cooling system design, support, and installation.
Date:
July 1, 1997
Creator:
Tuozzolo, J.; Brodowski, J. & Danby, G.
Object Type:
Article
System:
The UNT Digital Library
Cost and performance analysis of physical security systems
CPA - Cost and Performance Analysis - is a prototype integration of existing PC-based cost and performance analysis tools: ACEIT (Automated Cost Estimating Integrated Tools) and ASSESS (Analytic System and Software for Evaluating Safeguards and Security). ACE is an existing DOD PC-based tool that supports cost analysis over the full life cycle of a system; that is, the cost to procure, operate, maintain and retire the system and all of its components. ASSESS is an existing DOE PC-based tool for analysis of performance of physical protection systems. Through CPA, the cost and performance data are collected into Excel workbooks, making the data readily available to analysts and decision makers in both tabular and graphical formats and at both the system and subsystem levels. The structure of the cost spreadsheets incorporates an activity-based approach to cost estimation. Activity-based costing (ABC) is an accounting philosophy used by industry to trace direct and indirect costs to the products or services of a business unit. By tracing costs through security sensors and procedures and then mapping the contributions of the various sensors and procedures to system effectiveness, the CPA architecture can provide security managers with information critical for both operational and strategic decisions. The …
Date:
June 1, 1997
Creator:
Hicks, M. J.; Yates, David; Jago, William H.; Phillips, Alan W. & Togo, Dennis F.
Object Type:
Article
System:
The UNT Digital Library
Scouting, Volume 85, Number 6, November-December 1997
Bi-monthly publication of the Boy Scouts of America, written for Boy Scout leaders, officials, and others interested in the work of the Scouts. It includes articles about events and activities, updates from the national headquarters, topical columns and essays, and news from various chapters nationwide.
Date:
November 1997
Creator:
Boy Scouts of America
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
The Clifton Record (Clifton, Tex.), Vol. 102, No. 90, Ed. 1 Friday, November 7, 1997
Semi-weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
November 7, 1997
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
Ultra-High Intensity Proton Accelerators and their Applications
The science and technology of proton accelerators have progressed considerably in the past three decades. Three to four orders of magnitude increase in both peak intensity and average flux have made it possible to construct high intensity proton accelerators for modern applications, such as: spallation neutron sources, kaon factory, accelerator production of tritium, energy amplifier and muon collider drivers. The accelerator design focus switched over from intensity for synchrotrons, to brightness for colliders to halos for spallation sources. An overview of this tremendous progress in both accelerator science and technology is presented, with special emphasis on the new challenges of accelerator physics issues such as: H(-) injection, halo formation and reduction of losses.
Date:
December 31, 1997
Creator:
Weng, W. T.
Object Type:
Article
System:
The UNT Digital Library
The Clifton Record (Clifton, Tex.), Vol. 102, No. 88, Ed. 1 Friday, October 31, 1997
Semi-weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
October 31, 1997
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
Survey of plutonium and uranium atom ratios and activity levels in Mortandad Canyon
For more than three decades, Mortandad Canyon has been the primary release area of treated liquid radioactive waste from the Los Alamos National Laboratory (Laboratory). In this survey, six water samples and seven stream sediment samples collected in Mortandad Canyon were analyzed by thermal ionization mass spectrometry to determine the plutonium and uranium activity levels and atom ratios. By measuring the {sup 240}Pu/{sup 239}Pu atom ratios, the Laboratory plutonium component was evaluated relative to that from global fallout. Measurements of the relative abundance of {sup 235}U and {sup 236}U were also used to identify non-natural components. The survey results indicate that the Laboratory plutonium and uranium concentrations in waters and sediments decrease relatively rapidly with distance downstream from the major industrial sources. Plutonium concentrations in shallow alluvial groundwater decrease by approximately 1,000-fold along a 3,000-ft distance. At the Laboratory downstream boundary, total plutonium and uranium concentrations were generally within regional background ranges previously reported. Laboratory-derived plutonium is readily distinguished from global fallout in on-site waters and sediments. The isotopic ratio data indicate off-site migration of trace levels of Laboratory plutonium in stream sediments to distances approximately two miles downstream of the Laboratory boundary.
Date:
October 1, 1997
Creator:
Gallaher, B. M.; Efurd, D. W.; Rokop, D. J.; Benjamin, T. M. & Stoker, A. K.
Object Type:
Report
System:
The UNT Digital Library
The Clifton Record (Clifton, Tex.), Vol. 102, No. 1, Ed. 1 Wednesday, January 1, 1997
Semi-weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
January 1, 1997
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
The Clifton Record (Clifton, Tex.), Vol. 102, No. 94, Ed. 1 Friday, November 21, 1997
Semi-weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
November 21, 1997
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
The Clifton Record (Clifton, Tex.), Vol. 102, No. 93, Ed. 1 Wednesday, November 19, 1997
Semi-weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
November 19, 1997
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
The Clifton Record (Clifton, Tex.), Vol. 102, No. 75, Ed. 1 Wednesday, September 17, 1997
Semi-weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
September 17, 1997
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
The Clifton Record (Clifton, Tex.), Vol. 102, No. 83, Ed. 1 Wednesday, October 15, 1997
Semi-weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
October 15, 1997
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
The Clifton Record (Clifton, Tex.), Vol. 102, No. 59, Ed. 1 Wednesday, July 23, 1997
Semi-weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
July 23, 1997
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
The Clifton Record (Clifton, Tex.), Vol. 102, No. 104, Ed. 1 Friday, December 26, 1997
Semi-weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
December 26, 1997
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
The Clifton Record (Clifton, Tex.), Vol. 102, No. 96, Ed. 1 Friday, November 28, 1997
Semi-weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
November 28, 1997
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
The Clifton Record (Clifton, Tex.), Vol. 102, No. 63, Ed. 1 Wednesday, August 6, 1997
Semi-weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
August 6, 1997
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
The Clifton Record (Clifton, Tex.), Vol. 102, No. 29, Ed. 1 Wednesday, April 9, 1997
Semi-weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
April 9, 1997
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
The Clifton Record (Clifton, Tex.), Vol. 102, No. 43, Ed. 1 Wednesday, May 28, 1997
Semi-weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
May 28, 1997
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
The Clifton Record (Clifton, Tex.), Vol. 102, No. 92, Ed. 1 Friday, November 14, 1997
Semi-weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
November 14, 1997
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History