Partner
UNT Libraries Government Documents Department
308
Oklahoma Historical Society
142
UNT Libraries Special Collections
34
Sterling Municipal Library
11
Carl Albert Congressional Research and Studies Center
7
Rice University Woodson Research Center
6
Alvin Community College
5
Patrick Heath Public Library
5
Virgil and Josephine Gordon Memorial Library
5
Nellie Pederson Civic Library
4
51 More
Collection
Office of Scientific & Technical Information Technical Reports
232
Texas Digital Newspaper Program
105
Jim Argo Collection
93
Oklahoma Digital Newspaper Program
57
Tocker Foundation Grant
50
Government Accountability Office Reports
49
Congressional Research Service Reports
20
Altus Times-Democrat
11
The Baytown Sun
11
Chickasha Newspaper Collection
11
83 More
Country
States
Year
Month
Day
Cooperation Between the Russia Federation and the United States to Enhance the Existing Nuclear-Material Protection, Control, and Accounting Systems at Mayak Production Association
The Ministry of the Russian Federation for Atomic Energy (MINATOM) and the US Department of Energy (DOE) are engaged in joint, cooperative efforts to reduce the likelihood of nuclear proliferation by enhancing Material Protection, Control and Accounting (MPC&A) systems in both countries. Mayak Production Association (Mayak) is a major Russian nuclear enterprise within the nuclear complex that is operated by lylINATOM. This paper describes the nature, scope, and status of the joint, cooperative efforts to enhance existing MPC&A systems at Mayak. Current cooperative efforts are focused on enhancements to the existing MPC&A systems at two of the plants operated by Mayak that work with proliferation-sensitive nuclear materials.
Date:
July 19, 1999
Creator:
Cahalane, P. T.; Ehinger, M. H.; James, L. T.; Jarrett, J. H.; Lundgren, R. A.; Manatt, D. R. et al.
Object Type:
Article
System:
The UNT Digital Library
CALDERON COKEMAKING PROCESS/DEMONSTRATION PROJECT
This project deals with the demonstration of a coking process using proprietary technology of Calderon, with the following objectives geared to facilitate commercialization: (1) making coke of such quality as to be suitable for use in hard-driving, large blast furnaces; (2) providing proof that such process is continuous and environmentally closed to prevent emissions; (3) demonstrating that high-coking-pressure (non-traditional) coal blends which cannot be safely charged into conventional by-product coke ovens can be used in the Calderon process; and (4) demonstrating that coke can be produced economically, at a level competitive with coke imports. The activities of the past quarter were focused on the following: Consolidation of the team of stakeholders; Move the site for the commercial demonstration to LTV Steel, Cleveland, Ohio; Permitting for new site; Site specific engineering; Cost update of the project as it relates to the Cleveland location; FETC update; DCAA audit; and Updated endorsement of Calderon process by Ohio EPA and U.S. EPA, Region 5.
Date:
March 19, 1999
Creator:
Calderon, Albert
Object Type:
Report
System:
The UNT Digital Library
Thermal History of the Felsite Unit, Geysers Geothermal Field, From Thermal Modeling of 40Ar/39Ar Incremental Heating Data
An Ar-40/Ar-39 and U-Pb study was performed of the Geysers plutonic complex of the Geysers Geothermal Field in California. Sixty-nine ion microprobe spot analyses of zircons from four granite samples from the plutonic complex that underlies the Geysers geothermal field yielded Pb-207/Pb-206 vs. U-238/Pb-206 concordia ages ranging from 1.13 {+-} 0.04 Ma to 1.25 {+-} 0.04 Ma. The U-Pb ages coincide closely with Ar-40/Ar-39 age spectrum plateau and ''terminal'' ages from coexisting K-feldspars and with the eruption ages of overlying volcanic rocks. The data indicate that the granite crystallized at 1.18 Ma and had cooled below 350 C by {approximately}0.9-1.0 Ma. Interpretation of the feldspar Ar-40/Ar-39 age data using multi-diffusion domain theory indicates that post-emplacement rapid cooling was succeeded either by slower cooling from 350-300 C between 1.0 and 0.4 Ma or transitory reheating to 300-350 C at about 0.4-0.6 Ma. Heat flow calculations constrained with K-feldspar thermal histories and the pre sent elevated regional heal flow anomaly demonstrate that appreciable heat input from sources external to the known Geysers plutonic complex is required to maintain the geothermal system. This requirement is satisfied by either a large, underlying, convecting magma chamber (now solidified) emplaced at 1.2 Ma or episodic intrusion …
Date:
August 19, 1999
Creator:
California), T. M. Harrison (U of; U), G. B. Dalrymple (Oregon State; Utah), J. B. Hulen (U of; Lanphere, M. A.; Grove, M. & Lovera, O. M.
Object Type:
Report
System:
The UNT Digital Library
Economic value of global weather measurements
Global sensor networks could support increased activity in a number of economic sectors. Potential benefits and the predicted time scales required to realize them are estimated. Benefits are particular compelling for fundamental reasons for aviation, hotels and restaurants, natural disasters, construction, agriculture, and apparel. These benefits can be captured by simple logistic approximations.
Date:
February 19, 1999
Creator:
Canavan, G. & Butterworth, J.
Object Type:
Report
System:
The UNT Digital Library
High-performance computational and geostatistical experiments for testing the capabilities of 3-d electrical tomography
This project explores the feasibility of combining geologic insight, geostatistics, and high-performance computing to analyze the capabilities of 3-D electrical resistance tomography (ERT). Geostatistical methods are used to characterize the spatial variability of geologic facies that control sub-surface variability of permeability and electrical resistivity Synthetic ERT data sets are generated from geostatistical realizations of alluvial facies architecture. The synthetic data sets enable comparison of the �truth� to inversion results, quantification of the ability to detect particular facies at particular locations, and sensitivity studies on inversion parameters
Date:
January 19, 1999
Creator:
Carle, S. F.; Daily, W. D.; Newmark, R. L.; Ramirez, A. & Tompson, A.
Object Type:
Article
System:
The UNT Digital Library
TIME-RESOLVED INFRARED SPECTROSCOPY IN THE U121R BEAMLINE AT THE NSLS
A facility for performing time-resolved infrared spectroscopy has been developed at the NSLS, primarily at beamline U12IR. The pulsed IR light from the synchrotron is used to perform pump-probe spectroscopy. The authors present here a description of the facility and results for the relaxation of photoexcitations in both a semiconductor and superconductor.
Date:
July 19, 1999
Creator:
Carr, G. L.; Laveigne, J. D.; Lobo, R. P. S. M.; Reitze, D. H. & Tanner, D. B.
Object Type:
Article
System:
The UNT Digital Library
Characterization of the new NSLS infrared microspectroscopy beamline U10B
The first of several new infrared beamlines, built on a modified bending magnet port of the NSLS VUV ring, is now operational for mid-infrared microspectroscopy. The port simultaneously delivers 40 mrad by 40 mrad to two separate beamlines and spectrometer endstations designated U10A and U10B. The latter is equipped with a scanning infrared microspectrometer. The combination of this instrument and high brightness synchrotron radiation makes diffraction-limited microspectroscopy practical. This paper describes the beamline's performance and presents quantitative information on the diffraction-limited resolution.
Date:
July 19, 1999
Creator:
Carr, G.L.
Object Type:
Article
System:
The UNT Digital Library
Evidence for millimeter-wave coherent emission from the NSLS VUV ring
Coherent synchrotron radiation from the NSLS VUV ring has been detected and partially characterized. The observations have been performed at the new far infrared beamline U12IR. The coherent radiation is peaked near a wavelength of 7mm and occurs in short duration bursts. The bursts occur only when the electron beam current (I) exceeds a threshold value (I{sub th}), which itself varies with ring operating conditions. Beyond threshold, the average intensity of the emission is found to increase as (I-I{sub th}). The coherent emission implies micro-bunching of the electron beam due to a longitudinal instability.
Date:
July 19, 1999
Creator:
Carr, G.L.
Object Type:
Article
System:
The UNT Digital Library
The Baytown Sun (Baytown, Tex.), Vol. 77, No. 251, Ed. 1 Thursday, August 19, 1999
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
August 19, 1999
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 77, No. 277, Ed. 1 Sunday, September 19, 1999
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
September 19, 1999
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 77, No. 303, Ed. 1 Tuesday, October 19, 1999
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
October 19, 1999
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 78, No. 17, Ed. 1 Friday, November 19, 1999
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
November 19, 1999
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 78, No. 42, Ed. 1 Sunday, December 19, 1999
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
December 19, 1999
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
Predicting Microstructural-Level Residual Stresses and Crack Paths in Ceramics
Microstructural-level residual stresses arise in ceramics due to thermal expansion anisotropy. The magnitude of these stresses can be very high and may cause spontaneous microcracking during the processing of these materials. The orientation data obtained by backscattered electron diffraction and grain boundary energies obtained by AFM were used in conjunction with an object oriented finite element analysis package (OOF) to predict the magnitude of residual stresses in alumina. Crack initiation and propagation were also simulated based on the Griffith fracture criterion.
Date:
May 19, 1999
Creator:
Cater, W. C.; Glass, S. J.; Rohrer, G. S.; Saylor, D. M. & Vedula, V. R.
Object Type:
Article
System:
The UNT Digital Library
[Letter: Cedar Springs Merchants to Razzle Dazzle Dallas]
Letter from Cedar Springs Merchants to Razzle Dazzle Dallas objecting to the annual street party as bad for their businesses.
Date:
August 19, 1999
Creator:
Cedar Springs Merchants
Object Type:
Letter
System:
The UNT Digital Library
High Energy-Efficiency Retrofits to Baltimore's Row Homes
The purpose of the research project is to develop high-perfommnce, energy-eflicient retrofits of existing row homes in Baltimore, Maryland. These efficiency enhancements are to optimize building envelope improvements, mechanical equipment improvements and operational improvements to the highest cost-effective level. Furthermore, this project is to investigate and demonstrate the impact of high-performance energy-efficiency retrofit improvements on row homes in the Historic East area of Baltimore. Three homes awaiting renovation are planned to receive building envelope, mechanical system, and electrical system improvements that will improve their energy petiormance. An incremental additional cost ceiling of $4000 for the energy eftlciency improvements, beyond those normally installed, has been set by the project.
Date:
April 19, 1999
Creator:
Chalk, J.; Johnson, A.L.; Lipscomb, L. & Wendt, R.
Object Type:
Article
System:
The UNT Digital Library
1999 annual progress report -- Energy conservation team
This report highlights progress achieved during FY 1999 under the Light-duty Fuels Utilization R and D Program. The program is comprised of two elements: the Advanced Petroleum-Based APB Fuels Program which focused on developing and testing advanced fuels for use with compression-ignition direct-injection (CIDI) engines and fuel cells and the Alternative Fuels Program which focused on Natural gas and natural gas derived fuels. The report contains 17 summaries of industry and National Laboratory projects. Fuel efficient vehicles with very low emissions are essential to meet the challenges of climate change, energy security, and improved air quality. The authors anticipate cooperative efforts with the auto and energy industries to develop new and innovative technologies that will be used to make advanced transportation vehicles that are fuel efficient, clean, and safe.
Date:
October 19, 1999
Creator:
Chalk, S.
Object Type:
Report
System:
The UNT Digital Library
Electrochemical studies of Mg-doped Li{sub 4}Ti{sub 5}O{sub 12} anodes.
Commercial lithium-ion batteries use carbon as the material of choice for the anode. However, because lithiated carbon has a voltage very close to the potential of metallic lithium, there are concerns about the safety of fully-charged carbon electrodes. The safety issue can be addressed by using a material that intercalates lithium at a higher voltage. A promising material is the lithium-titanium-oxide spinel material Li{sub 4}Ti{sub 5}O{sub 12} which can accommodate 3 Li{sup +} ions per formula unit (corresponding to 175 mAh/g) in a two-phase reaction at approximately 1.5 V versus lithium. One of the drawbacks of this system is that the end-member Li{sub 4}Ti{sub 5}O{sub 12} is electronically insulating, which limits electron transfer at the electrode surface. By doping this material with magnesium, Li{sub 4{minus}x}Mg{sub x}Ti{sub 5}O{sub 12}, we introduced mixed-valent Ti{sup 4+}/Ti{sup 3+} into the stoichiometric spinel structure and thereby increased the electronic conductivity by several orders of magnitude without sacrificing electrochemical performance. In this presentation we will provide data on the extent of the solid solution in Li{sub 4{minus}x}Mg{sub x}Ti{sub 5}O{sub 12}, the variation of electronic conductivity as a function of dopant concentration and the rate capability of the doped material.
Date:
July 19, 1999
Creator:
Chen, C. H.; Jansen, A. N. & Vaughey, J.
Object Type:
Article
System:
The UNT Digital Library
Physics design of the DARHT 2nd axis accelerator cell
The next generation of radiographic machines based on induction accelerators require very high brightness electron beams to realize the desired x-ray spot size and intensity. This high brightness must be maintained throughout the beam transport, from source to x-ray converter target. The accelerator for the second-axis of the Dual Axis Radiographic Hydrodynamic Test (DARHT) facility is being designed to accelerate a 4-kA, 2-{micro}s pulse of electrons to 20 MeV. After acceleration, the 2-{micro}s pulse will be chopped into a train of four 50-ns pulses with variable temporal spacing by rapidly deflecting the beam between a beam stop and the final transport section. The short beam pulses will be focused onto an x-ray converter target generating four radiographic pulses within the 2-{micro}s window. Beam instability due to interaction with the accelerator cells can very adversely effect the beam brightness and radiographic pulse quality. This paper describes the various issues considered in the design of the accelerator cell with emphasis on transverse impedance and minimizing beam instabilities.
Date:
August 19, 1999
Creator:
Chen, Y. J.; Houck, T. L.; Reginato, L. J.; Shang, C. C. & Yu, S. S.
Object Type:
Article
System:
The UNT Digital Library
Analysis and Tests of Pultruded Blades for Wind Turbine Rotors
PS Enterprises, Inc. investigated a flexible, downwind, free-yaw, five-blade rotor system employing pultruded blades. A rotor was designed, manufactured and tested in the field. A preliminary design study and proof of concept test were conducted to assess the feasibility of using pultruded blades for wind turbine rotors. A 400 kW turbine was selected for the design study and a scaled 80 kW rotor was fabricated and field tested as a demonstration of the concept. The design studies continued to support the premise that pultruded blades offer the potential for significant reductions in rotor weight and cost. The field test provided experimental performance and loads data that compared well with predictions using the FLEXDYNE aeroelastic analysis. The field test also demonstrated stable yaw behavior and the absence of stall flutter over the wind conditions tested. During the final year of the contract, several studies were conducted by a number of independent consultants to address specific technical issues related to pultruded blades that could impact the commercial viability of turbines using this technology. The issues included performance, tower strikes, yaw stability, stall flutter, fatigue, and costs. While the performance of straight pultruded blades was projected to suffer a penalty of about 13% …
Date:
July 19, 1999
Creator:
Cheney, M. C. (PS Enterprises, Glastonbury, Connecticut); Olsen, T.; Quandt, G. & Archidiacono, P.
Object Type:
Report
System:
The UNT Digital Library
The Boerne Star (Boerne, Tex.), Vol. 94, No. 6, Ed. 1 Tuesday, January 19, 1999
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
January 19, 1999
Creator:
Chionsini, Brandi
Object Type:
Newspaper
System:
The Portal to Texas History
The Boerne Star (Boerne, Tex.), Vol. 94, No. 15, Ed. 1 Friday, February 19, 1999
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
February 19, 1999
Creator:
Chionsini, Brandi
Object Type:
Newspaper
System:
The Portal to Texas History
The Boerne Star (Boerne, Tex.), Vol. 94, No. 23, Ed. 1 Friday, March 19, 1999
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
March 19, 1999
Creator:
Chionsini, Brandi
Object Type:
Newspaper
System:
The Portal to Texas History
The Sealy News (Sealy, Tex.), Vol. 112, No. 85, Ed. 1 Tuesday, October 19, 1999
Semiweekly newspaper from Sealy, Texas that includes local, state, and national news along with advertising.
Date:
October 19, 1999
Creator:
Chionsini, Brandi
Object Type:
Newspaper
System:
The Portal to Texas History