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
A continuous sampling air-ICP for metals emission monitoring
An air-inductively coupled plasma (air-ICP) system has been developed for continuous sampling and monitoring of metals as a continuous emission monitor (CEM). The plasma is contained in a metal enclosure to allow reduced-pressure operation. The enclosure and plasma are operated at a pressure slightly less than atmospheric using a Roots blower, so that sample gas is continuously drawn into the plasma. A Teflon sampling chamber, equipped with a sampling pump, is connected to the stack that is to be monitored to isokinetically sample gas from the exhaust line and introduce the sample into the air-ICP. Optical emission from metals in the sampled gas stream is detected and monitored using an acousto-optic tunable filter (AOTF)--echelle spectrometer system. A description of the continuous sampling air-ICP system is given, along with some preliminary laboratory data for continuous monitoring of metals.
Date:
September 19, 1999
Creator:
Baldwin, D. P.; Zamzow, D. S.; Eckels, D. E. & Miller, G. P.
Object Type:
Article
System:
The UNT Digital Library
Control Method for Improved Energy Capture Below Rated Power (Preprint prepared for ASME/JSME)
To maximize energy capture, a variable-speed wind turbine should operate continuously at the tip-speed-ratio that results in the maximum power coefficient (Cpo) and, therefore, extracts the maximum energy from the wind. This is the main idea behind improved energy capture from variable-speed operation. However, this goal is only partially achievable due to rapid variations in wind speed and the inertia of the wind turbine rotor. Although it is not possible to operate continuously at maximum efficiency, improvements in energy capture during variable-speed operation can be gained by improved tracking of Cpo. In this paper the aerodynamic torque, estimated by an observer, and rotor speed are used to improve the energy capture of a variable-speed turbine. Two methods are used. The first method uses the torque error for control. The second method is formulated such that the estimated percent power loss is used directly for control. Also, the use of blade pitch below rated power is investigated. A small improvement in energy capture is realized by use of the described control methods. For turbines with a sharp Cp peak or slower time constant, greater improvement would be observed.
Date:
July 19, 1999
Creator:
Pierce, K.
Object Type:
Article
System:
The UNT Digital Library
Controlled densification of mullite for composite applications.
As part of an effort to fabricate oxide-based fibrous monolithic ceramics, sintering of mullite has been examined. The effects of Y{sub 2}O{sub 3} additions on sinterability of sol-gel-derived mullite and on the resulting microstructure were evaluated over a range of compositions, sintering times, and temperatures. Electron microscopy, X-ray diffraction, differential thermal analysis, and density measurements indicated that the Y{sub 2}O{sub 3} additions promoted densification through formation of a Y-Si-Al-O liquid phase. This phase tended to solidify as a glass during normal processing, but could be crystallized by a two-step annealing process at 1300 and 1200 C. The four-point flexural strengths of mullite and mullite-5 Wt.% Y{sub 2}O{sub 3} were also examined.
Date:
May 19, 1999
Creator:
Cruse, T. A.
Object Type:
Article
System:
The UNT Digital Library
Conversion of Phase II Unsteady Aerodynamics Experiment Data to Common Format
A vast amount of aerodynamic, structural, and turbine performance data were collected during three phases of the National Renewable Energy Laboratory's Unsteady Aerodynamics Experiment (UAE). To compare data from the three phases, a similar format of engineering unit data is required. The process of converting Phase II data from a previous engineering unit format to raw integer counts is discussed. The integer count files can then be input to the new post-processing software, MUNCH. The resulting Phase II engineering unit files are in a common format with current and future UAE engineering unit files. An additional objective for changing the file format was to convert the Phase II data from English units to SI units of measurement.
Date:
July 19, 1999
Creator:
Hand, M. M.
Object Type:
Report
System:
The UNT Digital Library
Cooper Review (Cooper, Tex.), Vol. 119, No. 33, Ed. 1 Thursday, August 19, 1999
Weekly newspaper from Cooper, Texas that includes local, state, and national news along with advertising.
Date:
August 19, 1999
Creator:
Kisic, Theresa
Object Type:
Newspaper
System:
The Portal to Texas History
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
Correction schemes for the LHC lattice at collision
Normal form analysis and tracking results show that both normal and skew resonances are driven strongly by the nonlinear fields of the IR quadrupoles. We report here on the possibility of improving the dynamic aperture by compensating these resonances with the use of correctors placed in the IRs. The effectiveness of local correction schemes in the presence of beam-beam interactions is also studied.
Date:
October 19, 1999
Creator:
Tanaji Sen, N. Gelfand and W. Wan
Object Type:
Article
System:
The UNT Digital Library
Corrective Action Decision Document for Corrective Action Unit 423: Building 03-60 Underground Discharge Point, Tonopah Test Range, Nevada
This Corrective Action Decision Document (CADD) has been prepared for Corrective Action Unit (CAU) 423, Building 03-60 Underground Discharge Point (UDP) in accordance with the Federal Facility Agreement and Consent Order (FFACO) of 1996 that was agreed to by the US Department of Energy, Nevada Operations Office (DOE/NV); the Nevada Division of Environmental Protection (NDEP); and the U.S Department of Defense (FFACO, 1996). The CADD provides or references the specific information necessary to recommend a preferred corrective action for the single Corrective Action Site (CAS), 03-02-002-0308, within CAU 423. Corrective Action Unit 423 is located at the Tonopah Test Range (TTR), Nevada. The TTR is approximately 255 kilometers (km) (140 miles[mi]) northwest of Las Vegas, Nevada. The UDP is approximately 73 meters (m) (240 feet [ft]) northwest of the northwest corner of Building 03-60, the Auto Maintenance Shop. Corrective Action Unit 423 is comprised of the UDP and an associated discharge line extending from Building 03-60. The UDP received waste oil products from the Auto Maintenance Shop, a light-duty fleet maintenance shop in the Area 3 compound, from 1965 to 1989 or 1990 (DOE/NV, 1997).
Date:
June 19, 1999
Creator:
United States. Department of Energy. Nevada Operations Office.
Object Type:
Report
System:
The UNT Digital Library
Correlation between nuclear response and defects in CZT
Vertical high pressure Bridgman (VHPB) was considered until now to be the most successful crystal growth method to produce Cd{sub 1{minus}x}Zn{sub x}Te (CZT), (0.04 < x < 0.24), for X- and gamma-ray detector crystals. Recently Horizontal Bridgman (HB) Cd{sub 1{minus}x}Zn{sub x}Te crystals produced by IMARAD Co. have also been successfully fabricated into nuclear spectroscopic radiation detectors. In view of the database of many years' study of the electrical properties of VHPB CZT grown and obtained from various sources, the authors also studied the HB CZT crystals in order to compare the defects present in both different kinds of crystals grown by different methods. The VHB-grown samples were examined using thermoelectric emission spectroscopy (TEES), X- and gamma ray spectroscopy and laser induced transient charge technique (TCT). The surface and the bulk crystalline homogeneity were mapped using triaxial double crystal x-ray diffraction (TADXRD) and infrared transmission spectroscopy (IR). They have found a correlation between crystallinity, IR transmission microstructure and trapping times. Spectrometer grade VHPB CZT crystals exhibit trapping times of 20 {micro}s for electrons and 7 {micro}s for holes, however, regions, which were opaque to IR transmission, had trapping times shorter by one order of magnitude. The trapping times of HB CZT …
Date:
July 19, 1999
Creator:
Hermon, H.; Schieber, M.; James, R. B.; Lee, E.; Cross, E.; Goorsky, M. et al.
Object Type:
Article
System:
The UNT Digital Library
[Correspondence from WESTAT Corporation to Mitchell Elementary School Principal on TETAC Project]
A significant correspondence from the WESTAT Corporation to the esteemed Principal of Mitchell Elementary School. The letter discusses the comprehensive report on the TETAC (Transforming Education Through the Arts Challenge) project, offering strategic insights and evaluation findings.
Date:
March 19, 1999
Creator:
unknown
Object Type:
Letter
System:
The UNT Digital Library
Crack growth monitoring in harsh environments by electrical potential measurements
Electric potential measurement (EPM) technology offers an attractive alternative to conventional nondestructive evaluation (NDE) for monitoring crack growth in harsh environments. Where conventional NDE methods typically require localized human interaction, the EPM technique developed at the Idaho National Engineering and Environmental Laboratory (INEEL) can be operated remotely and automatically. Once a crack-like defect is discovered via conventional means, EPM can be applied to monitor local crack size changes. This is of particular interest in situations where an identified structural defect is not immediately rejectable from a fitness-for-service viewpoint, but due to operational and environmental conditions may grow to an unsafe size with continuing operation. If the location is in a harsh environment where periodic monitoring by normal means is either too costly or not possible, a very expensive repair may be immediately mandated. However, the proposed EPM methodology may offer a unique monitoring capability that would allow for continuing service. INEEL has developed this methodology, supporting equipment, and calibration information to apply EPM in a field environment for just this purpose. Laboratory and pilot scale tests on full-size engineering structures (pressure vessels and piping) have been successfully performed. The technique is applicable to many severe environments because the sensitive equipment …
Date:
September 19, 1999
Creator:
Lloyd, W. R.; Reuter, W. G. & Weinberg, D. M.
Object Type:
Article
System:
The UNT Digital Library
The Cuero Record (Cuero, Tex.), Vol. 105, No. 20, Ed. 1 Wednesday, May 19, 1999
Weekly newspaper from Cuero, Texas that includes local, state, and national news along with advertising.
Date:
May 19, 1999
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
CVD-diamond-based position sensitive photoconductive detector for high-flux x-rays and gamma rays.
A position-sensitive photoconductive detector (PSPCD) using insulating-type CVD diamond as its substrate material has been developed at the Advanced Photon Source (APS). Several different configurations, including a quadrant pattern for a x-ray-transmitting beam position monitor (TBPM) and 1-D and 2-D arrays for PSPCD beam profilers, have been developed. Tests on different PSPCD devices with high-heat-flux undulator white x-ray beam, as well as with gamma-ray beams from {sup 60}Co sources have been done at the APS and National Institute of Standards and Technology (NIST). It was proven that the insulating-type CVD diamond can be used to make a hard x-ray and gamma-ray position-sensitive detector that acts as a solid-state ion chamber. These detectors are based on the photoconductivity principle. A total of eleven of these TBPMs have been installed on the APS front ends for commissioning use. The linear array PSPCD beam profiler has been routinely used for direct measurements of the undulator white beam profile. More tests with hard x-rays and gamma rays are planned for the CVD-diamond 2-D imaging PSPCD. Potential applications include a high-dose-rate beam profiler for fourth-generation synchrotrons radiation facilities, such as free-electron lasers.
Date:
April 19, 1999
Creator:
Shu, D.
Object Type:
Article
System:
The UNT Digital Library
Dallas Voice (Dallas, Tex.), Vol. 15, No. 43, Ed. 1 Friday, February 19, 1999
Weekly newspaper from Dallas, Texas that includes local, state, and national news and advertising of interest to the Lesbian, Gay, Bisexual, and Transgender (LGBT) community.
Date:
February 19, 1999
Creator:
Vercher, Dennis
Object Type:
Newspaper
System:
The UNT Digital Library
Dallas Voice (Dallas, Tex.), Vol. 15, No. 47, Ed. 1 Friday, March 19, 1999
Weekly newspaper from Dallas, Texas that includes local, state, and national news and advertising of interest to the Lesbian, Gay, Bisexual, and Transgender (LGBT) community.
Date:
March 19, 1999
Creator:
Vercher, Dennis
Object Type:
Newspaper
System:
The UNT Digital Library
Dallas Voice (Dallas, Tex.), Vol. 16, No. 29, Ed. 1 Friday, November 19, 1999
Weekly newspaper from Dallas, Texas that includes local, state, and national news and advertising of interest to the Lesbian, Gay, Bisexual, and Transgender (LGBT) community.
Date:
November 19, 1999
Creator:
Vercher, Dennis
Object Type:
Newspaper
System:
The UNT Digital Library
DART, area agencies promoting action during ozone season
News release about DART, along with other local agencies, conducting an ozone awareness campaign which encourages residents to use DART and the T transportation options as opposed to single-occupancy vehicles.
Date:
May 19, 1999
Creator:
Lyons, Morgan
Object Type:
Text
System:
The Portal to Texas History
DART taking additional steps to promote rail safety
News release about the erection of a fence around a light rail transit track near an elementary school and plans for the placement of safety fences along other tracks.
Date:
April 19, 1999
Creator:
Lyons, Morgan
Object Type:
Text
System:
The Portal to Texas History
Decennial Census: Information on the Accuracy of Address Coverage
Correspondence issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO provided information on the: (1) extent to which the accuracy of the 1990 census address counts varied by geographic area; and (2) difficulties that the Bureau of the Census faces in building a quality address list."
Date:
November 19, 1999
Creator:
United States. General Accounting Office.
Object Type:
Text
System:
The UNT Digital Library
Decomposition Studies of Solid Residues from Dried Salt Solutions Containing Phenylborate Compounds
This study determined the decomposition rate of dried solid residues from alkaline salt solutions containing various phenylborate species.
Date:
July 19, 1999
Creator:
Fondeur, F. F.
Object Type:
Report
System:
The UNT Digital Library
Department of Energy: Cost Estimates for the Hanford Tank Waste Remediation Project
Correspondence issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO provided information on the differences between GAO's 1998 report on the Department of Energy's (DOE) Hanford Tank Waste Remediation project and a 1998 report on the same project prepared by the Pacific Rim Enterprise Center, focusing on why the two reports reached substantially different conclusions about the growth in costs for the tank waste project."
Date:
May 19, 1999
Creator:
United States. General Accounting Office.
Object Type:
Text
System:
The UNT Digital Library
Department of Housing and Urban Development: Loan Origination and Foreclosed Property Management Processes
Correspondence issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO determined: (1) the extent to which the Department of Housing and Urban Development (HUD) had established adequate loan origination procedures and consistently applied them to determine whether loan applicants comply with the Direct Endorsement (DE) program's statutory, regulatory, and eligibility requirements and have any outstanding delinquent federal debt; and (2) whether HUD's Management and Marketing (M&M) contractors were adequately documenting the actions taken to preserve, protect, and maintain HUD's foreclosed properties."
Date:
November 19, 1999
Creator:
United States. General Accounting Office.
Object Type:
Text
System:
The UNT Digital Library
Department of Veterans Affairs: Alleged Improper Personnel Practices at the Ambulatory Care Center in Las Vegas, Nevada
Correspondence issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO investigated alleged improper personnel practices by the Department of Veterans Affairs (VA) at the Addeliar D. Guy III VA Ambulatory Care Center in Las Vegas, Nevada, focusing on whether Dr. Anthony Salem maintained a hit list for the purpose of disciplining or terminating ambulatory center employees known to be strong advocates of health care for veterans."
Date:
March 19, 1999
Creator:
United States. General Accounting Office.
Object Type:
Text
System:
The UNT Digital Library
Determination of worst case projected source term in tank 241-SY-102
This document describes the methodology used to determine the worst case projected source term that could be in double-shell tank 241-SY-102 for the cross-site waste transfer to tank 241-AP-107. The worst case projected source term given in Table 4-1 is the weighted average of the tank waste sources with the addition of sufficient waste from a defined worst source tank to fill the tank to 416 inches. The projected source term in this document is not intended to represent what will be in tank 241-SY-102. Rather, it is a conservative bounding composition considering that the volume of waste that will be added from each current source is unknown.
Date:
May 19, 1999
Creator:
FOWLER, K.D.
Object Type:
Report
System:
The UNT Digital Library