Partner
UNT Libraries Government Documents Department
2,920
Oklahoma Historical Society
588
UNT Libraries
205
Sterling Municipal Library
115
South Plains College
62
Carl Albert Congressional Research and Studies Center
61
UNT Libraries Special Collections
56
Allen Public Library
54
Livingston Municipal Library
48
Alvin Community College
46
85 More
Collection
Office of Scientific & Technical Information Technical Reports
2,661
Texas Digital Newspaper Program
1,280
Tocker Foundation Grant
683
Oklahoma Digital Newspaper Program
654
Chickasha Newspaper Collection
158
UNT Theses and Dissertations
147
Altus Times-Democrat
136
The Baytown Sun
115
Sapulpa Herald
112
Sapulpa Area Newspaper Collection
112
147 More
Degree Department
Department of Psychology
18
Department of Higher Education
12
College of Music
11
...
9
Department of Biological Sciences
9
Department of History
9
Department of Accounting
6
Department of Chemistry
6
Department of Elementary, Early Childhood and Reading Education
5
Department of Political Science
5
34 More
Degree Discipline
Degree Level
Country
States
Year
Month
Language
5,083 Matching Results
Results open in a new window/tab. Unexpected Results? Search the Catalog Instead.
Results:
1 - 24 of
5,083
next
Efficiency effects of variation in controlled experimental variables
When a designed experiment is conducted, the exact levels of controlled experimental variables specified by the design may not be attainable. Two different types of situations can occur in which the actual settings of the design variables deviate from the target design settings. In one case, the actual settings obtained are unknown. In the other case, the actual settings are known; however desirable design properties such as orthogonality may have been lost. This paper examines the impact of known and unknown errors in experimental variables for designed experiments in which the response is assumed to be approximately linear in the region of interest. For comparison, the well known situation where the target values of the experimental variables can actually be obtained will also be considered.
Date:
January 1, 1993
Creator:
Wendelbeger, J.R.
Object Type:
Article
System:
The UNT Digital Library
Efficiency effects of variation in controlled experimental variables
When a designed experiment is conducted, the exact levels of controlled experimental variables specified by the design may not be attainable. Two different types of situations can occur in which the actual settings of the design variables deviate from the target design settings. In one case, the actual settings obtained are unknown. In the other case, the actual settings are known; however desirable design properties such as orthogonality may have been lost. This paper examines the impact of known and unknown errors in experimental variables for designed experiments in which the response is assumed to be approximately linear in the region of interest. For comparison, the well known situation where the target values of the experimental variables can actually be obtained will also be considered.
Date:
June 1, 1993
Creator:
Wendelbeger, J. R.
Object Type:
Article
System:
The UNT Digital Library
Energy Efficient Drivepower : Literature Reference List, Volume 1, General User's Supplement.
This document lists a large number of information sources in the area of the efficient use of drivepower. This broad area covers not just electric enters a facility to when the load is driven and controlled.
Date:
May 1, 1993
Creator:
Ula, Sadrul; Birnbaum, Larry E. & Jordan, Don
Object Type:
Report
System:
The UNT Digital Library
Energy Efficient Drivepower : Literature Reference List, Volume 1 General User's Supplement.
This document lists a large number of information sources in the area of the efficient use of drivepower. This broad area covers not just electric enters a facility to when the load is driven and controlled.
Date:
January 1, 1993
Creator:
Ula, Sadrul; Jordan, Don L. & Birnbaum, Larry E.
Object Type:
Report
System:
The UNT Digital Library
Controlled synthesis of polyenes by catalytic methods. Progress report, December 1, 1992--November 30, 1993
Four studies are reported: living cyclopolymerization of diethyl dipropargylmalonate by Mo(CH-t-Bu)(NAr)[OCMe(CF{sub 3}){sub 2}]{sub 2} in dimethoxyethane, effect of chain length on conductivity of polyacetylene, nonlinear optical analysis of a series of triblock copolymers containing model polyenes, and synthesis of bifunctional hexafluoro-t-butoxide Mo species and their use as initiators in ROMP reactions.
Date:
December 1, 1993
Creator:
Schrock, R. R.
Object Type:
Report
System:
The UNT Digital Library
Interim criteria for Organic Watch List tanks at the Hanford Site
This document establishes interim criteria for identifying single-shell radioactive waste storage tanks at the Hanford Site that contain organic chemicals mixed with nitrate/nitrite salts in potentially hazardous concentrations. These tanks are designated as ``organic Watch List tanks.`` Watch List tanks are radioactive waste storage tanks that have the potential for release of high-level waste as a result of uncontrolled increases in temperature or pressure. Organic Watch List tanks are those Watch List tanks that contain relatively high concentrations of organic chemicals. Because of the potential for release of high-level waste resulting from uncontrolled increases in temperature or pressure, the organic Watch List tanks (collectively) constitute a Hanford Site radioactive waste storage tank ``safety issue.``
Date:
September 1, 1993
Creator:
Babad, S. & Turner, D. A.
Object Type:
Report
System:
The UNT Digital Library
Ferrocyanide Safety Program rationale for removing six tanks from the safety watch list
This report documents an in-depth study of single-shell tanks containing ferrocyanide wastes. Topics include: safety assessments, tank histories, supportive documentation about interim stabilization and planned remedial activities.
Date:
September 1, 1993
Creator:
Borsheim, G. L.
Object Type:
Report
System:
The UNT Digital Library
Energy Efficient Drivepower : Literature Reference List, Volume 2 Design Engineer's Supplement.
A large number of information sources in the area of the efficient use of drivepower are listed. The main list is for the general user of drivepower systems. The other list is a supplemental reference list for the design engineer.
Date:
January 1, 1993
Creator:
Ula, Sadrul; Jordan, Don L. & Birnbaum, Larry E.
Object Type:
Report
System:
The UNT Digital Library
Title list of documents made publicly available, August 1--31, 1993. Volume 15, No. 8
This document is a monthly publication containing descriptions of information received and generated by the US Nuclear Regulatory commission (NRC). This information includes docketed material associated with civilian nuclear power plants and other uses of radioactive materials, and nondocketed material received and generated by NRC pertinent to its role as a regulatory agency. The following indexes are included: Personal Author corporate Source, Report Number, and Cross Reference of Enclosures to Principal Documents.
Date:
October 1, 1993
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Title List of documents made publicly available, September 1--30, 1993. Volume 15, No. 9
This document is a monthly publication containing descriptions of information received and generated by the US Nuclear Regulatory Commission (NRC). This information includes (1) docketed material associated with civilian nuclear power plants and other uses of radioactive materials, and (2) nondocketed material received and generated by NRC pertinent to its role as a regulatory agency. The following indexes are included: Personal Author, Corporate Source, Report Number, and Cross Reference of Enclosures to Principals Documents.
Date:
November 1, 1993
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
List of currently classified documents relative to Hanford Production Facilities Operations originated on the Hanford Site between 1961 and 1972
The United States Department of Energy (DOE) has declared that all Hanford plutonium production- and operations-related information generated between 1944 and 1972 is declassified. Any documents found and deemed useful for meeting Hanford Environmental Dose Reconstruction (HEDR) objectives may be declassified with or without deletions in accordance with DOE guidance by Authorized Derivative Declassifiers. The September 1992, letter report, Declassifications Requested by the Technical Steering Panel of Hanford Documents Produced 1944--1960, (PNWD-2024 HEDR UC-707), provides an important milestone toward achieving a complete listing of documents that may be useful to the HEDR Project. The attached listing of approximately 7,000 currently classified Hanford-originated documents relative to Hanford Production Facilities Operations between 1961 and 1972 fulfills TSP Directive 89-3. This list does not include such titles as the Irradiation Processing Department, Chemical Processing Department, and Hanford Laboratory Operations monthly reports generated after 1960 which have been previously declassified with minor deletions and made publicly available. Also Kaiser Engineers Hanford (KEH) Document Control determined that no KEH documents generated between January 1, 1961 and December 31, 1972 are currently classified. Titles which address work for others have not been included because Hanford Site contractors currently having custodial responsibility for these documents do not …
Date:
April 1, 1993
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Particulate behavior in a controlled-profile pulverized coal-fired reactor: A study of coupled turbulent particle dispersion and thermal radiation transport. Quarterly technical progress report, March 15, 1993--June 14, 1993
Improved understanding of the fundamental processes involved in pulverized-coal combustion is needed to make the energy extraction more efficient and the combustion byproducts environmentally safe. While the characterization of the local particulate behavior (concentration, size, and velocity) is important to the understanding of virtually all processes in a pulverized coal-fired furnace, it influences in a more direct way the turbulent particle dispersion and thermal radiation heat transfer. Yet the local particulate dynamics have gone relatively unaddressed, primarily because of lack of adequate instrumentation to carry out such a study. With recent advances in optical techniques such an effort is now possible. This proposal seeks to characterize the local particulate concentration, velocity, and size distribution in a wellcontrolled, parametrically-varied laboratory-scale reactor using a new laser diagnostic technique. This newly-developed technique is the only one currently available for the investigation of aspherical particles. The particulate data will be collected simultaneously with local gas temperature and wall radiant heat flux distributions.
Date:
November 1, 1993
Creator:
Queiroz, M. & Webb, B. W.
Object Type:
Report
System:
The UNT Digital Library
Particulate behavior in a controlled-profile pulverized coal-fired reactor: A study of coupled turbulent particle dispersion and thermal radiation transport. Quarterly technical progress report, December 15, 1992--March 14, 1993
During the sixth quarter progress has been made in the following areas: Preparation for reactor refurbishment, instrumentation development, coal acquisition for experimental tests, and radiation and particle dispersion modelling. Refurbishment of the Controlled Profile Reactor was initiated this summer and is completed. Construction work for the local transmissometer probe is also now completed. This laser-based instrument, combined with the data from the PCSV probe will enable estimate of the local concentration of particulates below 0.5 {mu}m in size. Additionally, it will permit measurement of the temporal statistics of the local particulate number density.
Date:
May 1, 1993
Creator:
Queiroz, M. & Webb, B. W.
Object Type:
Report
System:
The UNT Digital Library
Particulate behavior in a controlled-profile pulverized coal-fired reactor: A study of coupled turbulent particle dispersion and thermal radiation transport. Quarterly technical progress report, June 15, 1993--September 14, 1993
Testing on the CPR using Pitt No. 8 coal was completed this quarter. Combustion characteristics of this coal required combustion to take place at an air/fuel equivalence ration of 0.75 (fuel-rich) in order to maintain a stable flame. The reason for this difficulty in burning at higher equivalence ratios is still under investigation. Flame symmetry was established during testing using suction pyrometer measurements, and was checked at various times throughout the test. Repeatability measurements were also made. These tests showed that running on coal for four hours after warm up was necessary to ensure constant wall temperatures. The PCSV-P was used to measure radial profiles of velocities and number density distributions for particles between 0.4 and 98 microns at three axial locations in the CPR. The particle velocities were measured as the average small particle (0.4-3.5 micron) and large particle (3.5-98 micron) velocities. The analysis of the data taken during these tests has not been completed. The coal feed system was revised again before testing. The Acrison auger feeder used to deliver the coal was calibrated according to the armature setting on the feeder motor. Variability and repeatability of this method were established by taking several manual measurements over and …
Date:
November 1, 1993
Creator:
Queiroz, M. & Webb, B. W.
Object Type:
Report
System:
The UNT Digital Library
The use of protective barriers to deter inadvertent human intrusion into a mined geologic facility for the disposal of radioactive waste: A review of previous investigations and potential concepts
Sandia National Laboratories is evaluating the feasibility of developing protective barrier system for the Waste Isolation Pilot Plant (WIPP) to thwart inadvertent human intrusion into this radioactive-waste disposal system for a period of 9,900 years after assumed loss of active institutional controls. The protective barrier system would be part of a series of enduring passive institutional controls whose long-term function will be to reduce the likelihood of inadvertent human activities (e.g., exploratory drilling for resources) that could disrupt the WIPP disposal system.
Date:
June 1, 1993
Creator:
Tolan, T. L.
Object Type:
Report
System:
The UNT Digital Library
Export control guide: Spent nuclear fuel reprocessing and preparation of plutonium metal
The international Treaty on the Non-Proliferation of Nuclear Weapons, also referred to as the Non-Proliferation Treaty (NPT), states in Article III, paragraph 2(b) that {open_quotes}Each State Party to the Treaty undertakes not to provide . . . equipment or material especially designed or prepared for the processing, use or production of special fissionable material to any non-nuclear-weapon State for peaceful purposes, unless the source or special fissionable material shall be subject to the safeguards required by this Article.{close_quotes} This guide was prepared to assist export control officials in the interpretation, understanding, and implementation of export laws and controls relating to the international Trigger List for irradiated nuclear fuel reprocessing equipment, components, and materials. The guide also contains information related to the production of plutonium metal. Reprocessing and its place in the nuclear fuel cycle are described briefly; the standard procedure to prepare metallic plutonium is discussed; steps used to prepare Trigger List controls are cited; descriptions of controlled items are given; and special materials of construction are noted. This is followed by a comprehensive description of especially designed or prepared equipment, materials, and components of reprocessing and plutonium metal processes and includes photographs and/or pictorial representations. The nomenclature of the …
Date:
October 1, 1993
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Philosophical Society of Texas, Proceedings of the Annual Meeting: 1992
Proceedings of the annual meeting of the Philosophical Society of Texas held December 1992, including a list of attendees, text of addresses, changes to membership, and a list of members who have passed.
Date:
1993
Creator:
Philosophical Society of Texas
Object Type:
Book
System:
The Portal to Texas History
An experimental investigation of stimulated Brillouin scattering in laser-produced plasmas relevant to inertial confinement fusion
Despite the apparent simplicity of controlled fusion, there are many phenomena which have prevented its achievement. One phenomenon is laser-plasma instabilities. An investigation of one such instability, stimulated Brillouin scattering (SBS), is reported here. SBS is a parametric process whereby an electromagnetic wave (the parent wave) decays into another electromagnetic wave and an ion acoustic wave (the daughter waves). SBS impedes controlled fusion since it can scatter much or all of the incident laser light, resulting in poor drive symmetry and inefficient laser-plasma coupling. It is widely believed that SBS becomes convectively unstable--that is, it grows as it traverses the plasma. Though it has yet to be definitively tested, convective theory is often invoked to explain experimental observations, even when one or more of the theory`s assumptions are violated. In contrast, the experiments reported here not only obeyed the assumptions of the theory, but were also conducted in plasmas with peak densities well below quarter-critical density. This prevented other competing or coexisting phenomena from occurring, thereby providing clearly interpretable results. These are the first SBS experiments that were designed to be both a clear test of linear convective theory and pertinent to controlled fusion research. A crucial part of this …
Date:
February 11, 1993
Creator:
Bradley, K. S.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Multi motor controller MMC32: User manual
The MMC32 is a versatile stepping motor controller for systems with many motors. The system as currently configured can control up to 32 motors, with all motors capable of full speed operation concurrently in different pulse modes. Each individual motor`s position can be monitored in an open loop, a closed loop, or an encoded loop, even when the motor is moving. There are 2 limit switch inputs for each motor, and a further input to accept a reference position marker. The motors can be controlled via a front panel keyboard with display, or by a host computer over an IEEE-488 interface. Both methods can be used together if required. The details for manual operation are in Chapter 4, and for remote computer control are in Chapter 5. The manual operation is controlled by the front panel keypad with interactive menu display. There is an ``emergency stop`` key on the front panel keypad to abort the motion of all motors without losing track of the motors` position.
Date:
February 1, 1993
Creator:
Feng-Berman, S. K. & Siddons, D. P.
Object Type:
Report
System:
The UNT Digital Library
Free vibration analysis of a tank containing two liquids
A study of the dynamic characteristics of rigidly supported upright circular cylindrical tanks containing two different liquids is presented. The governing differential equations for the tank-two liquid system are obtained by application of the Rayleigh-Ritz procedure in combination with Lagrange`s equation. The response functions examined include the fundamental natural frequency, the associated mode of vibration and hydrodynamic pressure exerted against the tank wall. Unlike the cases of tanks containing one liquid in which the dynamic response is controlled by four parameters, the dynamic response of a tank that contains two liquids is controlled by six parameters. The numerical results are presented in tabular and graphic forms, and are compared with those of the identical tank filled with one liquid. Also, a simple approximate equation for evaluating the fundamental natural frequency for preliminary design is proposed.
Date:
May 1, 1993
Creator:
Tang, Yu & Chang, Y. W.
Object Type:
Report
System:
The UNT Digital Library
Multi motor controller MMC32: User manual
The MMC32 is a versatile stepping motor controller for systems with many motors. The system as currently configured can control up to 32 motors, with all motors capable of full speed operation concurrently in different pulse modes. Each individual motor's position can be monitored in an open loop, a closed loop, or an encoded loop, even when the motor is moving. There are 2 limit switch inputs for each motor, and a further input to accept a reference position marker. The motors can be controlled via a front panel keyboard with display, or by a host computer over an IEEE-488 interface. Both methods can be used together if required. The details for manual operation are in Chapter 4, and for remote computer control are in Chapter 5. The manual operation is controlled by the front panel keypad with interactive menu display. There is an emergency stop'' key on the front panel keypad to abort the motion of all motors without losing track of the motors' position.
Date:
February 1, 1993
Creator:
Feng-Berman, S. K. & Siddons, D. P.
Object Type:
Report
System:
The UNT Digital Library
Geomorphic stability field reconnaissance site visit, Canonsburg, Pennsylvania, December 1992. Final report
To license the Canonsburg site, the US Nuclear Regulatory Commission (NRC) has required that geomorphic stability be demonstrated for the stream banks and slopes around the perimeter of the site for 200 years. Based on a study of the stream channel and slopes, it has been determined that due to recent human intervention, the required geomorphic stability cannot now be achieved without installation of erosion protection works and continued monitoring of the site. The Pittsburgh District Corps of Engineers has plans to channelize Chartiers Creek and install erosion protection rock within the next 5 or 6 years, if local government agencies raise the necessary matching funds. Much of the stream bank and slope adjacent to the ``fenced in`` western area of the site is anticipated to remain geomorphically stable for more than 20 years, but less than 200 years without human intervention. Therefore in much of this area, the Corps of Engineers will have adequate time to perform its work without jeopardizing the integrity of the controlled area. In contrast, two approximately 200-foot (ft) (60-meter [m]) long portions of the stream channel located north-northwest of the encapsulation area are subject to active stream erosion that threatens the integrity of the …
Date:
May 1, 1993
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Rocking response of tanks containing two liquids
Liquid storage tanks are important components of industrial facilities and, when located in earthquake prone regions, should be designed to withstand the earthquakes to which they may be subjected. There are cases in which the density of the tank content is not uniform. For such cases, the dynamic responses of tanks containing liquids with different densities must be studied. A study on the dynamic response of upright circular cylindrical liquid-storage tanks containing two different liquids under a rock base motion with an arbitrary temporal variation is presented. Only rigid tanks were studied. The response quantities examined include the hydrodynamic pressure, sloshing wave height and the associated frequencies, base shear and moments. Each of these response quantities is expressed as the sum of the so-called impulsive component and convective component. Unlike the case of tanks containing one liquid, in which the response is controlled by one parameter, height-to-radius ratio, the response of tanks containing two different liquids are controlled by three parameters: height-to-radius ratio, and mass density ratio and height ratio of the two liquids. The interrelationship of the responses of the tank-liquid system to rocking and lateral base excitations is established by examining numerical results extensively. It is found that …
Date:
June 1, 1993
Creator:
Tang, Yu & Chang, Y. W.
Object Type:
Report
System:
The UNT Digital Library
Air pollution effects field research facility: 3. UV-B exposure and monitoring system
The Oak Ridge National Laboratory Outdoor UltraViolet-B (UV-B) Exposure and Monitoring Facility was developed in 1980 to provide well-controlled and -monitored exposure of specific terrestrial plant. species to elevated levels of ultraviolet (UV) radiation. The introduction of various anthropogenic agents into the earth`s stratosphere has resulted in a decrease in the volume of ozone (O{sub 3}) present here. The decrease in O{sub 3} has resulted in an increase in the level of UV radiation reaching thee earth`s surface. Of particular interest is the level of UV-B, because it has the most detrimental effect on living tissue. A thorough understanding of the effects of elevated levels of UV-B on living tissue is critical to the formulation of economic policy regarding production of such agents and alternative strategies. The UV region of interest is referred to as UV-B and corresponds to radiation with a wavelength of 290 to 320 nm. Design, operation, and performance of the automated generation, exposure, and monitoring system are described. The system has proved to be reliable and easy to maintain and operate, and it provides significant flexibility in exposure programs. The system software is described, and detailed listings are provided. The ability to expose plants to controlled …
Date:
March 1, 1993
Creator:
McEvers, J. A.; Hileman, M. S. & Edwards, N. T.
Object Type:
Report
System:
The UNT Digital Library