Partner
Oklahoma Historical Society
168
UNT Libraries Government Documents Department
124
UNT Libraries Special Collections
92
Sterling Municipal Library
9
Rice University Woodson Research Center
8
Dallas Municipal Archives
7
Carl Albert Congressional Research and Studies Center
6
Upshur County Library
6
Alvin Community College
5
UNT Libraries
5
49 More
Collection
Office of Scientific & Technical Information Technical Reports
115
Jim Argo Collection
101
Texas Digital Newspaper Program
91
Oklahoma Digital Newspaper Program
74
KXAS-NBC 5 News Collection
66
Tocker Foundation Grant
40
Chickasha Newspaper Collection
19
LGBT Collections
12
The Gayly Oklahoman
11
Lesbian Gay Political Coalition Papers (The Dallas Way)
10
88 More
Country
States
Year
Month
Day
Effect of a solid/liquid interface on bulk solution structures under flow
It has been known for some time that a shear field can impart enough energy to a liquid system for it to exhibit a phase change. Not as well appreciated is the fact that non Newtonian solutions can be driven into a quasi phase separation due to the vastly different shear rates between the bulk and near surface regions. Using a variety of scattering techniques the authors have probed the interfacial and near surface region of a system of wormlike colloidal particles under flow separately from the bulk. They find that the hexagonal phase which forms under flow near the surface, does not persist into the bulk. They also present data showing substantial differences in the kinetics of alignment and relaxation of the two phases.
Date:
July 15, 1997
Creator:
Butler, P. D.; Hamilton, W. A.; Hayter, J. B.; Magid, L. J. & Slawecki, T. M.
Object Type:
Report
System:
The UNT Digital Library
Efficient polishing of aspheric optics
The objectives of this project are to develop, evaluate, and optimize novel designs for a polishing tool intended for ultra-precise figure corrections on aspheric optics with tolerances typical of those required for use in extreme ultraviolet (EUV) projection lithography. This work may lead to an enhanced US industrial capability for producing optics for EUV, x-ray and, other high precision applications. LLNL benefits from developments in computer-controlled polishing and the insertion of fluid mechanics modeling into the precision manufacturing area. Our accomplishments include the numerical estimation of the hydrodynamic shear stress distribution for a new polishing tool that directs and controls the interaction of an abrasive slurry with an optical surface. A key milestone is in establishing a correlation between the shear stress predicted using our fluid mechanics model and the observed removal footprint created by a prototype tool. In addition, we demonstrate the ability to remove 25 nm layers of optical glass in a manner qualitatively similar to macroscopic milling operations using a numerically- controlled machine tool. Other accomplishments include the development of computer control software for directing the polishing tool and the construction of a polishing testbed.
Date:
April 15, 1997
Creator:
Taylor, J. S.; Piscotty, M. A.; Nguyen, N. Q.; Landram, C. S. & Ng, L. C.
Object Type:
Report
System:
The UNT Digital Library
Electra Star-News (Electra, Tex.), Vol. 90, No. 39, Ed. 1 Thursday, May 15, 1997
Weekly newspaper from Electra, Texas that includes local, state, and national news along with advertising.
Date:
May 15, 1997
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Electric utility applications of hydrogen energy storage systems
This report examines the capital cost associated with various energy storage systems that have been installed for electric utility application. The storage systems considered in this study are Battery Energy Storage (BES), Superconducting Magnetic Energy Storage (SMES) and Flywheel Energy Storage (FES). The report also projects the cost reductions that may be anticipated as these technologies come down the learning curve. This data will serve as a base-line for comparing the cost-effectiveness of hydrogen energy storage (HES) systems in the electric utility sector. Since pumped hydro or compressed air energy storage (CAES) is not particularly suitable for distributed storage, they are not considered in this report. There are no comparable HES systems in existence in the electric utility sector. However, there are numerous studies that have assessed the current and projected cost of hydrogen energy storage system. This report uses such data to compare the cost of HES systems with that of other storage systems in order to draw some conclusions as to the applications and the cost-effectiveness of hydrogen as a electricity storage alternative.
Date:
October 15, 1997
Creator:
Swaminathan, S. & Sen, R.K.
Object Type:
Report
System:
The UNT Digital Library
The Elimination of Oxides of Nitrogen from the Exhaust of a dieselEngine using cryogenic air separation
None
Date:
August 15, 1997
Creator:
Manikowski, A.; Noland, G. & Green, M. A.
Object Type:
Article
System:
The UNT Digital Library
[Email Exchange on Additional Reading Material & Agenda for Round Table]
A comprehensive email conversation documenting the strategic preparations for an upcoming Round Table discussion.
Date:
April 15, 1997
Creator:
unknown
Object Type:
Letter
System:
The UNT Digital Library
EMPLACEMENT DRIFT AIR CONTROL SYSTEM
None
Date:
September 15, 1997
Creator:
KRAMER, NORMAN E.
Object Type:
Report
System:
The UNT Digital Library
Engineering Development of Coal-Fired High-Performance Power Systems
The concept uses a pyrolyzation process to convert coal into fuel gas and char. The char is fired in a High Temperature Advanced Furnace (HITAF). It is a pulverized fuel- fired boiler/ air heater where steam and gas turbine air are indirectly heated. The fuel gas generated in the pyrolyzer is then used to heat the gas turbine air further before it enters the gas turbine. The project is currently in Phase 2 which includes engineering analysis, laboratory testing and pilot plant testing. Research and development is being done on the HIPPS systems that are not commercial or being developed on other projects. Pilot plant testing of the pyrolyzer subsystem and the char combustion subsystem are being done separately, and then a pilot plant with a more integrated HIPPS arrangement will be tested. The High Performance Power System is a coal- fired, combined cycle power generating system that will have an efficiency of greater than 47 percent (HHV) with NOx and SOx less than 0.025 Kg/ GJ (0.06 lb/ MMBtu). This performance is achieved by combining a coal pyrolyzation process with a High Temperature Advanced Furnace (HITAF). The pyrolyzation process consists of a pressurized fluidized bed reactor which is operated …
Date:
December 15, 1997
Creator:
Shenker, J.
Object Type:
Report
System:
The UNT Digital Library
Ensemble: 1997-04-15 - Tuba-Euphonium Choir
Ensemble concert performed at the UNT College of Music Recital Hall.
Date:
April 15, 1997
Creator:
University of North Texas. Tuba-Euphonium Choir.
Object Type:
Sound
System:
The UNT Digital Library
Ensemble: 1997-04-15 - UNT Concert Choir
Ensemble concert performed at the UNT College of Music Concert Hall.
Date:
April 15, 1997
Creator:
University of North Texas. Concert Choir.
Object Type:
Sound
System:
The UNT Digital Library
Ensemble: 1997-10-15 - Symphony Orchestra
Access:
Use of this item is restricted to the UNT Community
Ensemble concert performed at the UNT College of Music Concert Hall.
Date:
October 15, 1997
Creator:
University of North Texas. Symphony Orchestra.
Object Type:
Sound
System:
The UNT Digital Library
Excitations of the Transversely Polarized Spin Density Waves in Chromium
Inelastic neutron scattering measurements across the TSDW satellites of chromium were performed at {Delta}E=5,20meV, both under zero field and 5T magnetic field. Analysis concerning the transverse magnetic excitations (T{sub 1},T{sub 2}) and the longitudinal magnetic excitations (L) indicates that T{sub 1} and L are equally intense while T{sub 2} dominates and becomes more so at higher energies.
Date:
July 15, 1997
Creator:
Lee, W. T.; Werner, S. A.; Fernandez-Baca, J. A. & Fishman, R. S.
Object Type:
Article
System:
The UNT Digital Library
Exploring our world. Second year report
Prince George`s Community College (PGCC), in collaboration with the Prince George`s County Public School System (PGCPS) modified the Exploring Our World, a mathematics, science, and technology program, during the spring of 1996. The second year of that program was delivered to twenty-six rising seventh and eighth grade, students, and one rising ninth grader during the period July 9, 1996 to August 2, 1996. As in 1995, Dr. Baldwin coordinated and supervised the program; Charles Hoffman was the teacher, Patricia Crosson was the counselor; Kishma Brown was the paid college mentor; and Dante Brown was a volunteer high school mentor. Exploring Our World met six hours per day, four days each week, for four weeks. One day each week was devoted to a field trip, while the other three days were spent on-campus in a variety of classroom,library, computer laboratory, and science laboratory activities. Each student was randomly assigned to one of six groups. Each group conducted a research project and presented project results to parents, staff, and other participants on the night before the last day of the program. This report contain a summary of second year of this program.
Date:
June 15, 1997
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Fast polynomial approach to calculating wake fields
In the computation of transverse wake field effects in accelerators, it is necessary to compute expressions of the form given in equations (1). It is usually desired to compute this a large number of times, the values of z{sub i} and x{sub i} being different at each iteration, other quantities remaining the same. The problem in practical applications is that the computational work grows as N{sub m}{sup 2}. Thus even using parallel computation to achieve speedup, the elapsed time to obtain a result still increases linearly with N{sub m}. The authors introduce here an approximate method of evaluating the sum in (1) whose computational work increases only as N{sub m}logN{sub m}. It involves some significant initial computation which does not have to be repeated at each subsequent iteration. The basis of the approach is to replace the individual contributions of a group of distant macroparticles with a local series expansion. In this respect it is similar in spirit to the so called fast multipole method.
Date:
June 15, 1997
Creator:
Goldstein, Charles I. & Peierls, Ronald F.
Object Type:
Report
System:
The UNT Digital Library
FEA stress analysis for SAFKEG 2863B
This report covers the evaluation of the structural design of the two stainless steel containment vessels in CROFT SAFKEG Model Number 2863B, for conformance to the design criteria of the NRC Regulatory Guide 7.6, NRC Regulatory Guide 7.8, and the applicable requirements of the ASME Boiler and Pressure Vessel Code, Section 3, and Section 8. The two containment vessels are designated Cans 2870 and 2871. Each of these containment vessels was analyzed for the loadings specified in chapter 2, Section 2.1.2 of the SARP. Structural assessment of Cans 2870 and 2871 due to loading considerations beyond the evaluation of pressure and temperature are presented. This report is organized as follows: (1) overview of the design of each containment vessel and pressure boundary; (2) brief description of both containment vessels; (3) discussion of normal and accident conditions; (4) analysis assumptions; (5) detailed structural evaluation of each component of each containment vessel; (6) demonstration of compliance to Regulatory Guide 7.6 stress evaluations; (7) demonstration of compliance to Regulatory Guide 7.8 loading combinations; and (8) summary of the calculated stresses, comparison with design allowables, estimates of margins of safety and a summary of results and conclusions.
Date:
July 15, 1997
Creator:
Puckett, A.
Object Type:
Report
System:
The UNT Digital Library
Federal Indian Law: Background and Current Issues
This report briefly describes some of the fundamentals of federal Indian law, including the concept of tribal sovereignty and the allocation of authority among state, federal, and tribal governments with reference to criminal and civil laws and taxation.
Date:
September 15, 1997
Creator:
Murphy, M. Maureen
Object Type:
Report
System:
The UNT Digital Library
Feedstock and Web Analysis Using Mid-Infrared Diffuse Reflectance Spectroscopy and Imaging Spectroradiometry
Potential applications of mid-infrared (MIR) spectroscopy in the forest products industry include on-line analysis of feedstock and web materials; these applications differ dramatically in purpose, speed, and overall chemical heterogeneity. Characterization of feedstock will enable sorting of the stock and/or wet chemistry adjustment prior to the web stage of paper production. Sorting will require imaging of the stock as well as classification of the wide variety of chemistry found in recycled stock. At the opposite end of the manufacturing process, on-line analysis of the web will enable adjustment of machine parameters to maximize product quality and minimize waste. Spectroscopic requirements for web analysis include high-speed capability and measurement precision. If successful, both applications could result in a reduction of resource waste, a reduction of plant pollution, and a reduction of energy use while simultaneously improving product quality. Here the progress towards feedstock and web analysis with MIR spectroscopy is presented. To date, work has progressed in three main areas: Diffuse Reflectance mid-Infrared Fourier Transform (DRIFT) spectroscopy of cellulose-based materials, chemometrics analysis, and research of MIR instrumentation for prototype development. The DRIFT spectroscopy data represents a database of the chemistries and spectroscopic signatures of interest to the applications discussed here. Over …
Date:
September 15, 1997
Creator:
Powell, G. L. & Parks, J. E., II
Object Type:
Report
System:
The UNT Digital Library
Final report for reciprocating rod pump seal assembly (R.R.P.S.A.)
This technology provides a simple yet clever idea for preventing oil and saltwater polluting spills by sucker rod pumping oil wells, as well as prolonging the life of the stuffing box seals and pressure lubricating the polished rod. This objective is accomplished by introducing a non-polluting, food grade, high viscosity lubricant into the void space between two sets of seals in a typical stuffing box. This safe-fluid acts as a sacrificial fluid that will be the fluid that is exposed to the atmosphere when the primary seal in the stuffing box leaks for any reason. In addition, the pressure on this sacrificial safe-fluid is maintained at the same pressure as the pressure on the produced fluid in the flow line at the pumping tee, thereby equalizing the pressure across the secondary seal in the stuffing box that separates the safe-fluid from the produced fluid. The unique feature, of equalizing the pressure across the secondary seal, is accomplished by using a pressure transmitter which is monitoring the pressure in the flow line (which is the fluid under the secondary seal) and transmitting that pressure to the safe-fluid (which is the fluid above the secondary seal) thereby equalizing the pressure across this …
Date:
December 15, 1997
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Fly ash-enhanced aluminum composites for automotive parts. Report for program startup to September 30, 1997
To produce and evaluate the use of aluminum ''ashalloys''--metal matrix composites that incorporate coal fly ash--in the commercial manufacture of cast automotive parts. The use of fly ash as an additive will help reduce the weight and cost of automotive parts, improve selected material properties, and reduce energy consumption and pollution.
Date:
October 15, 1997
Creator:
Golden, Dean & Rohatgi, Pradeep
Object Type:
Report
System:
The UNT Digital Library
Focus Report: Volume 75, Number 13, April 1997
Periodical discussing the future water needs for the State of Texas. The Texas Water Development Board addresses the projected needs over the next 50 years.
Date:
April 15, 1997
Creator:
Texas. Legislature. House of Representatives. Research Organization.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
A Fuel Cell Power Supply for Long Duration Balloon Flights UsingStored Cryogens
None
Date:
August 15, 1997
Creator:
Green, Michael A.; Manikowski, A.; Noland, G. & Golden, R.L.
Object Type:
Article
System:
The UNT Digital Library
Fundamental studies of fusion plasmas. Final report, May 1, 1993--December 14, 1997
In the course of this grant, Lodestar has collaborated with the TFTR ICRF team to carry out an extensive investigation of rf-edge physics relevant to the understanding and operation of the TFTR fast wave (FW) and ion Bernstein wave (IBW) antennas. Their FW work covered four main areas: rf sheath geometry on TFTR, ICRF convective cells and edge profile modifications, impurity production, and plasma glow and Fermi acceleration. Their IBW work, carried out over the last two years, was in support of the IBW transport barrier and poloidal flow generation experiments. A theoretical survey of rf-edge physics expected to be critical for these antennas was carried out. While the physics that was known to be important for FW systems was considered (especially sheath power dissipation, edge density modifications, and impurities), additional physics enters for IBW waves because of the shorter wavelength, slower group velocity, larger electric fields and the different polarization. In particular, ponderomotive forces, while normally negligible in the FW context, can be substantial for the IBW, but the jitter excursion distance of an electron is too large for validity of the usual theory. A new model for the resulting electron heating and density expulsion was developed. A new …
Date:
December 15, 1997
Creator:
Myra, James R.
Object Type:
Report
System:
The UNT Digital Library
[Funeral Program for Alma G. Craft, July 15, 1997]
Funeral program for Mrs. Alma G. Craft, born March 12, 1905 and died July 9, 1997. The funeral was held July 15, 1997 at Shiloh Baptist Church, officiated by Rev. Andrew Wilson. The funeral arrangements were made through the Lewis Funeral Home and she was buried in Southern Memorial Park in San Antonio, Texas.
Date:
July 15, 1997
Creator:
unknown
Object Type:
Pamphlet
System:
The Portal to Texas History
[Funeral Program for Earlon C. Woods, October 15, 1997]
Funeral program for Mr. Earlon C. Woods, who died October 9, 1997. The funeral was held October 15, 1997 at the Emmanuel A. M. E. Church, officiated by Rev. I. V. Tolbert. Funeral arrangements were made through the Lewis Funeral Home, and he was buried in Fort Sam Houston National Cemetery near San Antonio, Texas. Includes newspaper clipping of obituary.
Date:
October 15, 1997
Creator:
unknown
Object Type:
Pamphlet
System:
The Portal to Texas History