Partner
UNT Libraries Government Documents Department
1,869
Oklahoma Historical Society
574
UNT Libraries
229
Sterling Municipal Library
147
Hopkins County Genealogical Society
100
Livingston Municipal Library
76
Allen Public Library
75
UNT Libraries Special Collections
62
Calhoun County Public Library
55
Hondo Public Library
41
88 More
Collection
Office of Scientific & Technical Information Technical Reports
1,642
Texas Digital Newspaper Program
1,478
Tocker Foundation Grant
763
Oklahoma Digital Newspaper Program
610
Chickasha Newspaper Collection
151
The Baytown Sun
147
UNT Theses and Dissertations
134
Altus Times-Democrat
122
Sapulpa Herald
109
Sapulpa Area Newspaper Collection
109
143 More
Degree Department
Degree Discipline
Degree Level
Country
States
Year
Month
Language
4,168 Matching Results
Results open in a new window/tab. Unexpected Results? Search the Catalog Instead.
Results:
1 - 24 of
4,168
next
Hardware description ADSP-21020 40-bit floating point DSP as designed in a remotely controlled digital CW Doppler radar
A continuous wave Doppler radar system has been designed which is portable, easily deployed, and remotely controlled. The heart of this system is a DSP/control board using Analog Devices ADSP-21020 40-bit floating point digital signal processor (DSP) microprocessor. Two 18-bit audio A/D converters provide digital input to the DSP/controller board for near real time target detection. Program memory for the DSP is dual ported with an Intel 87C51 microcontroller allowing DSP code to be up-loaded or down-loaded from a central controlling computer. The 87C51 provides overall system control for the remote radar and includes a time-of-day/day-of-year real time clock, system identification (ID) switches, and input/output (I/O) expansion by an Intel 82C55 I/O expander. 5 refs., 8 figs., 2 tabs.
Date:
January 1, 1991
Creator:
Morrison, R. E. & Robinson, S. H.
Object Type:
Article
System:
The UNT Digital Library
Environmental Restoration and Waste Management Site-Specific Plan for the Oak Ridge Reservation. [Appendix contains accromyms list and maps of waste management facilities]
The United States Department of Energy (DOE) is committed to achieving and maintaining environmental regulatory compliance at its waste sites and facilities, while responding to public concerns and emphasizing waste minimization. DOE publishes the Environmental Restoration and Waste Management Five-Year Plan (FYP) annually to document its progress towards these goals. The purpose of this Site-Specific Plan (SSP) is to describe the activities, planned and completed, undertaken to implement these FYP goals at the DOE Field Office-Oak Ridge (DOE/OR) installations and programs; specifically, for the Oak Ridge Reservation (ORR), Oak Ridge Associated Universities (ORAU), and Hazardous Waste Remedial Action Program (HAZWRAP). Activities described in this SSP address hazardous, radioactive, mixed, and sanitary wastes, along with treatment, storage, and disposal of current production waste and legacy waste from past operation. The SSP is presented in sections emphasizing Corrective Activities (A), Environmental Restoration (ER), Waste Management (WM), Technology Development (TD), and Transportation; and includes descriptions of activities, resources, and milestones by installation or program. 87 tabs.
Date:
September 1, 1991
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Geothermal energy in the western United States and Hawaii: Resources and projected electricity generation supplies. [Contains glossary and address list of geothermal project developers and owners]
Geothermal energy comes from the internal heat of the Earth, and has been continuously exploited for the production of electricity in the United States since 1960. Currently, geothermal power is one of the ready-to-use baseload electricity generating technologies that is competing in the western United States with fossil fuel, nuclear and hydroelectric generation technologies to provide utilities and their customers with a reliable and economic source of electric power. Furthermore, the development of domestic geothermal resources, as an alternative to fossil fuel combustion technologies, has a number of associated environmental benefits. This report serves two functions. First, it provides a description of geothermal technology and a progress report on the commercial status of geothermal electric power generation. Second, it addresses the question of how much electricity might be competitively produced from the geothermal resource base. 19 figs., 15 tabs.
Date:
September 1, 1991
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Analysis of well test data---Application of probabilistic models to infer hydraulic properties of fractures. [Contains list of standardized terminology or nomenclatue used in statistical models]
Statistical and probabilistic methods for estimating the probability that a fracture is nonconductive (or equivalently, the conductive-fracture frequency) and the distribution of the transmissivities of conductive fractures from transmissivity measurements made in single-hole injection (well) tests were developed. These methods were applied to a database consisting of over 1,000 measurements made in nearly 25 km of borehole at five sites in Sweden. The depths of the measurements ranged from near the surface to over 600-m deep, and packer spacings of 20- and 25-m were used. A probabilistic model that describes the distribution of a series of transmissivity measurements was derived. When the parameters of this model were estimated using maximum likelihood estimators, the resulting estimated distributions generally fit the cumulative histograms of the transmissivity measurements very well. Further, estimates of the mean transmissivity of conductive fractures based on the maximum likelihood estimates of the model's parameters were reasonable, both in magnitude and in trend, with respect to depth. The estimates of the conductive fracture probability were generated in the range of 0.5--5.0 percent, with the higher values at shallow depths and with increasingly smaller values as depth increased. An estimation procedure based on the probabilistic model and the maximum likelihood …
Date:
September 27, 1991
Creator:
Osnes, J. D. (RE/SPEC, Inc., Rapid City, SD (United States)); Winberg, A.; Andersson, J. E. & Larsson, N. A. (Sveriges Geologiska AB, Goeteborg (Sweden))
Object Type:
Report
System:
The UNT Digital Library
Radioactive effluents in the Savannah River: Summary report for 1989
Researchers at the Savannah River Site have low-level radiometric studies of the Savannah River to distinguish between the effluent contributions of the Savannah River Site and Plant Vogtle. Since the startup of Plant Vogtle in 1987, researchers have routinely detected neutron-activated isotopes in controlled releases, but all have routinely detected neutron-activated isotopes in controlled releases, but all have been well below the Department of Energy`s (DOE) guidelines. The study has found that processing improvement at Plant Vogtle during 1989 have lowered the activities of effluents from Plant Vogtle. These studies will continue on a routine basis because they provide disturbing trends before actual health concerns evolve.
Date:
September 1, 1991
Creator:
Winn, W. G.
Object Type:
Report
System:
The UNT Digital Library
Research in Support of Forest Management. Final report, 1986--1991
This final research report on Research in Support of Forest Management for the Savannah River Forest Station covers the period 1986 thru 1991. This report provides a list of publications resulting from research accomplished by SEFES scientists and their cooperators, and a list of continuing research study titles. Output is 22 research publications, 23 publications involving technology transfer of results to various user groups, and 11 manuscripts in pre-publication format. DOE funding contributed approximately 15 percent of the total cost of the research.
Date:
December 1, 1991
Creator:
Marx, D. H.
Object Type:
Report
System:
The UNT Digital Library
Crack-tip chemistry modeling of stage I stress corrosion cracking
Stage I stress corrosion cracking usually exhibits a very strong K dependence with Paris law exponents of up to 30. 2 Model calculations indicate that the crack velocity in this regime is controlled by transport through a salt film and that the K dependence results from crack opening controlled salt film dissolution. An ionic transport model that accounts for both electromigration through the resistive salt film and Fickian diffusion through the aqueous solution was used for these predictions. Predicted crack growth rates are in excellent agreement with measured values for Ni with P segregated to the grain boundaries and tested in IN H{sub 2}SO{sub 4} at +900 mV. This salt film dissolution may be applicable to stage I cracking of other materials.
Date:
October 1, 1991
Creator:
Jones, R. H. & Simonen, E. P.
Object Type:
Article
System:
The UNT Digital Library
Interpretation of time domain electromagnetic soundings near geological contacts
Lateral changes in geology pose a serious problem in data interpretation for any surface geophysical method. Although many geophysical techniques are designed to probe vertically, the source signal invariably spreads laterally, so any lateral variations in geology will affect the measurements and interpretation. This problem is particularly acute for controlled source electromagnetic soundings because only a few techniques are available to interpret the data if lateral effects are present. In this thesis we examine the effects of geological contacts for the time domain electromagnetic sounding method (TDEM). Using two simple two-dimensional models, the truncated thin-sheet and the quarter-space, we examine the system response for several commonly used TDEM sounding configurations. For each system we determine the sensitivity to the contact, establish how to the contact anomaly may be distinguished from other anomalies and, when feasible, develop methods for interpreting the contact geometry and for stripping the contact anomaly from the observed data. Since no numerical models were available when this work was started, data were collected using scale models with a system designed at the University of California at Berkeley. The models were assembled within a table-top modeling tank from sheets or blocks of metal using air or mercury as …
Date:
December 1, 1991
Creator:
Wilt, M. J.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Cross flow induced vibrations in staggered arrays of cylindrical structures
Flow induced vibrations cause by instability is the subject of this investigation. The bulk of the work performed is theoretical in nature, the comparison with some of existing experimental data is given for each of four models described. First model encompasses the effects of prescribed motion on the cylinder. Such circumstances occur in the case of vortex shedding initiated instability. The reduced velocity within the cylinder array is low and there is no coupling between the adjacent cylinders. Second model assumes certain form of vibration and corresponding behavior of the perturbed velocity field in temporal and one of spatial coordinates thus transforming partial differential equations into ordinary differential equations and takes into account the motion of the neighboring cylinder. This corresponds to fluid elastic controlled instabilities. The resulting equations are solved analytically. The model is used for better understanding of the equations of cylinder motion as well as for quick estimates of threshold of instability. Third model relaxes an assumption about the form of vibration in spatial direction and uses the vorticity formulation of equation of fluid motion to account for fluid-solid interaction. This model analysis is of two phase (air-water mixture) flow. The void fraction distribution is found to …
Date:
December 31, 1991
Creator:
Marn, J.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Radioactive effluents in the Savannah River: Summary report for 1989
Researchers at the Savannah River Site have low-level radiometric studies of the Savannah River to distinguish between the effluent contributions of the Savannah River Site and Plant Vogtle. Since the startup of Plant Vogtle in 1987, researchers have routinely detected neutron-activated isotopes in controlled releases, but all have routinely detected neutron-activated isotopes in controlled releases, but all have been well below the Department of Energy's (DOE) guidelines. The study has found that processing improvement at Plant Vogtle during 1989 have lowered the activities of effluents from Plant Vogtle. These studies will continue on a routine basis because they provide disturbing trends before actual health concerns evolve.
Date:
September 1, 1991
Creator:
Winn, Willard G.
Object Type:
Report
System:
The UNT Digital Library
Interpretation of time domain electromagnetic soundings near geological contacts
Lateral changes in geology pose a serious problem in data interpretation for any surface geophysical method. Although many geophysical techniques are designed to probe vertically, the source signal invariably spreads laterally, so any lateral variations in geology will affect the measurements and interpretation. This problem is particularly acute for controlled source electromagnetic soundings because only a few techniques are available to interpret the data if lateral effects are present. In this thesis we examine the effects of geological contacts for the time domain electromagnetic sounding method (TDEM). Using two simple two-dimensional models, the truncated thin-sheet and the quarter-space, we examine the system response for several commonly used TDEM sounding configurations. For each system we determine the sensitivity to the contact, establish how to the contact anomaly may be distinguished from other anomalies and, when feasible, develop methods for interpreting the contact geometry and for stripping the contact anomaly from the observed data. Since no numerical models were available when this work was started, data were collected using scale models with a system designed at the University of California at Berkeley. The models were assembled within a table-top modeling tank from sheets or blocks of metal using air or mercury as …
Date:
December 1, 1991
Creator:
Wilt, Michael Joseph
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Kinetics of coal pyrolysis and devolatilization
Research continued on coal pyrolysis and devolatilization. The effects of reaction process on the transient temperature history of a particle have been examined. The reaction process is found to significantly reduce the temperature gradient across a burning particle relative to a nonreactive particle. The pyrolysis process, on the other hand, does not severely affect the temperature history of a heating particle for the kinetic parameters employed. Devolatilization experiments have been performed on various size cuts on an HVA Bituminous coal in entrained flow and heated grid reactors. Weight loss measurements were made in the entrained flow reactor (EFR) and tar yields and molecular weight distributions were measured for the heated grid reactor (HGR) experiments. The results imply the initial phase of the devolatilization of the HVA Bituminous coal is heat transfer controlled because the rate of tar information and evolution is heat transfer controlled. The invariance in EFR ultimate weight loss and low pressure tar yields and characteristics with change in particle size can be explained by morphological considerations of the parent coal particles. The non-symmetric, irregular shapes of the coal particles result in an intraparticle mass distribution much nearer an interphase surface area than that of an equivalent sphere …
Date:
January 1, 1991
Creator:
Seery, D. J.; Freihaut, J. D. & Proscia, W. M.
Object Type:
Report
System:
The UNT Digital Library
Biological Rhythms: Implications for the Worker
This report discusses biological rhythms: what they are, how they are controlled by the brain, and the role they play in regulating physiological and cognitive functions. The major focus of the report is the examination of the effects of nonstandard work hours on biological rhythms and how these effects can interact with other factors to affect the health, performance, and safety of workers.
Date:
September 1991
Creator:
United States. Congress. Office of Technology Assessment.
Object Type:
Report
System:
The UNT Digital Library
Puget Sound Area Electric Reliability Plan. Appendix B : Local Generation Evaluation : Draft Environmental Impact Statement.
The information and data contained in this Appendix was extracted from numerous sources. The principle sources used for technical data were Bonneville Power Administration's 1990 Resource Program along with its technical appendix, and Chapter 8 of the Draft 1991 Northwest Conservation and Electric Power Plan. All cost data is reported 1988 dollars unless otherwise noted. This information was supplemented by other data developed by Puget Sound utilities who participated on the Local Generation Team. Identifying generating resources available to the Puget Sound area involved a five step process: (1) listing all possible resources that might contribute power to the Puget Sound area, (2) characterizing the technology/resource status, cost and operating characteristics of these resources, (3) identifying exclusion criteria based on the needs of the overall Puget Sound Electric Reliability Plan study, (4) applying these criteria to the list of resources, and (5) summarizing of the costs and characteristics of the final list of resources. 15 refs., 20 tabs.
Date:
September 1, 1991
Creator:
United States. Bonneville Power Administration.
Object Type:
Report
System:
The UNT Digital Library
Treatment Technologies at Superfund Sites
The Comprehensive Environmental Response, Compensation. and Liability Act of 1980 (CERCLA), commonly known as Superfund, authorizes the Federal Government, through the Environmental Protection Agency (EPA), to clean up hazardous waste sites. There are currently about 1,200 sites on Superfund's National Priorities List, with remedial costs expected to be around $40 billion.
Date:
June 27, 1991
Creator:
Wozniak, Alborz A. & Reisch, Mark
Object Type:
Report
System:
The UNT Digital Library
[Texas Schools To Receive Satellite Television Access Equipment]
A press information / media release, in regards to Texas schools receiving satellite television equipment. In the beginning of October 1991 about two-hundred and fifty Texas school districts and Regional Education Service Centers will receive state funded TVROs, Television Receive Only satellite equipment. Texas schools want to enable the use of technology to access the satellite-based education services available and becoming available. Included in the statement is a list of all the Texas school districts who will be receiving the Satellite television access.
Date:
October 10, 1991
Creator:
Texas Education Agency
Object Type:
Text
System:
The UNT Digital Library
Security guide for subcontractors
This security guide of the Department of Energy covers contractor and subcontractor access to DOE and Mound facilities. The topics of the security guide include responsibilities, physical barriers, personnel identification system, personnel and vehicular access controls, classified document control, protecting classified matter in use, storing classified matter repository combinations, violations, security education clearance terminations, security infractions, classified information nondisclosure agreement, personnel security clearances, visitor control, travel to communist-controlled or sensitive countries, shipment security, and surreptitious listening devices.
Date:
January 1, 1991
Creator:
Adams, R.C.
Object Type:
Report
System:
The UNT Digital Library
Philosophical Society of Texas, Proceedings of the Annual Meeting: 1990
Proceedings of the annual meeting of the Philosophical Society of Texas held November 30-December 2, including a list of attendees, text of addresses, changes to membership, and biographical information about members who have passed. The theme of the conference was "Texas and The Changing World."
Date:
1991
Creator:
Philosophical Society of Texas
Object Type:
Book
System:
The Portal to Texas History
RCRA Facility Investigation report for Waste Area Grouping 6 at Oak Ridge National Laboratory, Oak Ridge, Tennessee. Volume 1, Sections 1 through 3: Environmental Restoration Program
WAG 6 comprises a shallow land burial facility used for disposal of low-level radioactive wastes (LLW) and, until recently, chemical wastes. As such, the site is subject to regulation under RCRA and the Comprehensive Environmental Response Compensation and Liability Act (CERCLA). To comply with these regulations, DOE, in conjunction with the Environmental Protection Agency (EPA) and the Tennessee Department of Environment and Conservation (TDEC), developed a strategy for closure and remediation of WAG 6 by 1997. A key component of this strategy was to complete an RFI by September 1991. The primary objectives of the RFI were to evaluate the site`s potential human health and environmental impacts and to develop a preliminary list of alternatives to mitigate these impacts. The WAG 6 one of three solid waste management units evaluated Oak Ridge National Laboratory (ORNL) existing waste disposal records and sampling data and performed the additional sampling and analysis necessary to: describe the nature and extent of contamination; characterize key contaminant transport pathways; and assess potential risks to human health and the environment by developing and evaluating hypothetical receptor scenarios. Estimated excess lifetime cancer risks as a result for exposure to radionuclides and chemicals were quantified for each hypothetical human …
Date:
September 1, 1991
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Vaccum and Beam Diagnostic Controls for Oric Beam Lines
Vacuum and beam diagnostic equipment on beam lines from the Oak Ridge Isochronous Cyclotron, ORIC, is now controlled by a new dedicated system. The new system is based on an industrial programmable logic controller with an IBM AT personal computer providing control room operator interface. Expansion of this system requires minimal reconfiguration and programming, thus facilitating the construction of additional beam lines. Details of the implementation, operation, and performance of the system are discussed. 2 refs., 2 figs.
Date:
January 1, 1991
Creator:
Tatum, B. A.
Object Type:
Article
System:
The UNT Digital Library
Automated computer software development standards enforcement
The Uniform Development Environment (UDE) is being investigated as a means of enforcing software engineering standards. For the programmer, it provides an environment containing the tools and utilities necessary for orderly and controlled development and maintenance of code according to requirements. In addition, it provides DoD management and developer management the tools needed for all phases of software life cycle management and control, from project planning and management, to code development, configuration management, version control, and change control. This paper reports the status of UDE development and field testing. 5 refs.
Date:
January 1, 1991
Creator:
Yule, H.P. & Formento, J.W.
Object Type:
Article
System:
The UNT Digital Library
The Brookhaven electron analogue, 1953--1957
The following topics are discussed on the Brookhaven electron analogue: L.J. Haworth and E.L. VanHorn letters; Original G.K. Green outline for report; General description; Parameter list; Mechanical Assembly; Alignment; Degaussing; Vacuum System; Injection System; The pulsed inflector; RF System; Ferrite Cavity; Pick-up electrodes and preamplifiers; Radio Frequency power amplifier; Lens supply; Controls and Power; and RF acceleration summary.
Date:
December 18, 1991
Creator:
Plotkin, M.
Object Type:
Report
System:
The UNT Digital Library
The Brookhaven electron analogue, 1953--1957
The following topics are discussed on the Brookhaven electron analogue: L.J. Haworth and E.L. VanHorn letters; Original G.K. Green outline for report; General description; Parameter list; Mechanical Assembly; Alignment; Degaussing; Vacuum System; Injection System; The pulsed inflector; RF System; Ferrite Cavity; Pick-up electrodes and preamplifiers; Radio Frequency power amplifier; Lens supply; Controls and Power; and RF acceleration summary.
Date:
December 18, 1991
Creator:
Plotkin, M.
Object Type:
Report
System:
The UNT Digital Library
Writer's Guide for technical procedures
A primary objective throughout the Department of Energy (DOE) complex is that operations be conducted in a deliberate and controlled manner with emphasis upon recognition and maintenance of the facility-specific safety envelope. One critical element of maintaining the safety envelope is procedures. DOE is providing guidance through this and other writer's guides to assist procedure writers across the DOE complex in producing accurate, complete, and usable procedures that promote safe and efficient operations in keeping with such DOE Orders as 5480.19, Conduct of Operations for DOE Facilities'', 5480.5, Safety of Nuclear facilities'', and 5480.6, Safety of Department of Energy-Owned Nuclear Reactors''. This Writer's Guide addresses the content, format, and style of technical procedures (procedures that prescribe production, operation of equipment and facilities, and maintenance activities) and is intended to be applied in a manner appropriate to the individual facility, 15 refs.
Date:
September 1, 1991
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library