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UNT Libraries Government Documents Department
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255
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9
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6
Carl Albert Congressional Research and Studies Center
5
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Mexic-Arte Museum
4
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Office of Scientific & Technical Information Technical Reports
273
Jim Argo Collection
210
Texas Digital Newspaper Program
108
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80
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52
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15
Altus Times-Democrat
9
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Degree Department
Country
States
Year
Month
Day
Enhancement of Equilibrium Shift in Dehydrogenation Reactions Using a Novel Membrane Reactor Semi-Annual Report: October 1998-February 1999
Using electroless deposition of palladium thin-films on a microporous ceramic substrate, we developed a hydrogen-selective palladium-ceramic composite membrane. The new membrane has significantly higher permeability and selectivity for hydrogen than many of the commercially available dense-metallic membrane. The hydrogen permeability of the new membrane increases with increasing temperature. These properties make it an ideal candidate for use in membrane reactors to study dehydrogenation reactions by equilibrium shift. To investigate the usefulness of the new membrane in membrane reactor-separator configuration, a model for studying dehydrogenation of cyclohexane by equilibrium in a membrane reactor is developed. Radial diffusion is considered to account for the concentration gradient in the radial direction due to permeation through the membrane. The model is investigated with and without the reaction. In the non-reaction case, a mixture of argon, benzene, cyclohexane, and hydrogen is used in the reaction side and argon is used in the separation side. In the case of dehydrogenation reaction, the feed stream to the reaction side contained hydrogen and argon while in the separation side argon is used as sweep gas. Equilibrium conversion for dehydrogenation of cyclohexane is 18.7%. Present study shows that 100% conversion can be achieved by equilibrium shift using Pd-Ceramic membrane …
Date:
April 30, 1999
Creator:
Ilias, Shamsuddin & King, Franklin G.
Object Type:
Report
System:
The UNT Digital Library
An Evaluation of the Parallel Shift-and-Invert Lanczos Method
When the Lanczos method is used to compute eigenvalues, it is often restarted or used with the shift-and-invert scheme. The restarted scheme usually uses less memory but the shift-and-invert scheme is more robust. In addition, the shift-and-invert Lanczos method requires accurate solutions of a series of linear systems. Parallel software packages suitable for these linear systems are only started to become available. In this talk, we will present our evaluation of two such packages and briefly examine when it is necessary to use the shift-and-invert scheme.
Date:
April 30, 1999
Creator:
Wu, K. & Simon, H.
Object Type:
Article
System:
The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Friday, April 30, 1999
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 30, 1999
Creator:
Bush, Kent
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Federally Chartered Corporation: Review of the Financial Statement Audit Report for the National Ski Patrol System, Incorporated, for Fiscal Year 1998
Correspondence issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO reviewed the audit report covering the financial statements of the National Ski Patrol System, Incorporated, for the fiscal year ended June 30, 1998, focusing on whether the audit report complied with the financial reporting requirements of the law."
Date:
April 30, 1999
Creator:
United States. General Accounting Office.
Object Type:
Text
System:
The UNT Digital Library
Federally Chartered Corporation: Review of the Financial Statement Audit Report for the Reserve Officers Association of the United States for Fiscal Year 1998
Correspondence issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO reviewed the audit report covering the financial statements of the Reserve Officers Association of the United States for the fiscal year ended March 31, 1998, focusing on whether the audit report complied with the financial reporting requirements of the law."
Date:
April 30, 1999
Creator:
United States. General Accounting Office.
Object Type:
Text
System:
The UNT Digital Library
Federally Chartered Corporation: Review of the Financial Statement Audit Reports for the Retired Enlisted Association, Incorporated, for 1995, 1996, and 1997
Correspondence issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO reviewed the audit report covering the financial statements of the Retired Enlisted Association, Incorporated, for the fiscal years ended December 31, 1995, 1996, and 1997, focusing on whether the audit report complied with the financial reporting requirements of the law."
Date:
April 30, 1999
Creator:
United States. General Accounting Office.
Object Type:
Text
System:
The UNT Digital Library
[Final report for DOE contract FG03-88ER13882]
The female reproductive organ, the gynoecium, is the most complex structure that plants produce. The molecular mechanisms that coordinate its development are unknown, but can be dissected by molecular genetics. The ettin (ett) mutation provides a remarkable window for viewing gynoecium development. ett induced alterations result from misinterpretation of positional information along longitudinal and transverse gynoecial axes. Molecular cloning revealed the ETT encoded amino acid sequence is homologous to transcriptional factors involved in signaling by the plant hormone auxin. Early ETT gene expression marks the site of the future outgrowth of the gynoecium. The primary gene sequence and pattern of expression of ETT fits with a role in hormone mediated signaling for regional development in the female organ.
Date:
April 30, 1999
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
FINAL TOPICAL REPORT FOR NOVEL SYSTEMS SEQUESTERING AND UTILIZATION OF CO2
Atmospheric CO{sub 2} concentrations are increasing by about 0.5% each year, and there is serious concern that this will cause adverse climate change via the ''greenhouse effect.'' The principal sources of the increase are the utilization of fossil fuels and the deforestation of land. The capture of CO{sub 2} from flue gas or process streams has been demonstrated using chemical absorption with an ethanolamine solvent. However, the cost of releasing the CO{sub 2} by thermal stripping and recovering the solvent is very high, resulting in an energy penalty of 27% to 37 %, depending on the type of power plant (1). Alternatives that would result in energy penalties of 15% have been investigated. Sequestering schemes for CO{sub 2} produced from fossil fuels conversion to energy in utility plants could instead yield useful polymer products. Relatively concentrated CO{sub 2} by-product streams from fermentation of cellulose to fuel ethanol will also be available for conversion to useful polymers. As shown in Figure 1, this project offers two opportunities for mitigating the emission of CO{sub 2} to the atmosphere, depending on the source configuration and economic feasibility of the proposed processes: CO{sub 2} in a conventional utility-produced flue gas could be sequestered to …
Date:
April 30, 1999
Creator:
Olson, Edwin S.
Object Type:
Report
System:
The UNT Digital Library
Focus Report, Volume 76, Number 12, April 1999
Report on the restructuring on the electric utility industry based on previous restructuring by California and Pennsylvania.
Date:
April 30, 1999
Creator:
Texas. Legislature. House of Representatives. Research Organization.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
[Funeral Program for Birdie Bess Coleman, April 30, 1999]
Funeral program for Mrs. Birdie Bess Coleman, born September 1, 1921 and died April 25, 1999. The funeral was held April 30, 1999 at Second Baptist Church, officiated by Rev. Robert L. Jemerson. The funeral arrangements were made through Lewis Funeral Home and she was buried in Ft. Sam Houston National Cemetery near San Antonio, Texas.
Date:
April 30, 1999
Creator:
unknown
Object Type:
Pamphlet
System:
The Portal to Texas History
Further Evidence for a Prepulse on OMEGA
None
Date:
April 30, 1999
Creator:
unknown
Object Type:
Article
System:
The UNT Digital Library
Fusion Research: Costs of Ending DOE's Participation in the International Thermonuclear Experimental Reactor Project Appear Reasonable
Correspondence issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO determined whether the Department of Energy's (DOE) expenses to close out its participation in the International Thermonuclear Experimental Reactor (ITER) project were reasonable."
Date:
April 30, 1999
Creator:
United States. General Accounting Office.
Object Type:
Text
System:
The UNT Digital Library
Grandview Tribune (Grandview, Tex.), Vol. 104, No. 38, Ed. 1 Friday, April 30, 1999
Weekly newspaper from Grandview, Texas that includes local, state, and national news along with advertising.
Date:
April 30, 1999
Creator:
Magness, Jack, Jr.
Object Type:
Newspaper
System:
The Portal to Texas History
Guest Artist: 1999-04-30 - Niklas Eklund, trumpet
Access:
Use of this item is restricted to the UNT Community
Guest artist recital performed at the UNT College of Music Recital Hall.
Date:
April 30, 1999
Creator:
Eklund, Niklas; Keohane, Maria; Candelaria, Leonard & Adkins, Cecil
Object Type:
Sound
System:
The UNT Digital Library
HEMISPHERIC CENTER FOR ENVIRONMENTAL TECHNOLOGY
The final data package has been completed for the Mississippi State University, DIAL FTP Wall Depth Removal Characterization Technology. The package has been sent to DIAL for comments. Work is progressing on completing the transfer of glove boxes and tanks from Rocky Flats to FIU-HCET for the purpose of performing size reduction technology assessments. Vendors are being identified and security measures are being put in place to meet the High Risk Property criteria required by Rocky Flats. The FIU-HCET Technology Assessment Program has been included as one of 11 verification programs across the US and Canada described in the Interstate Technology Regulatory Cooperation (ITRC) document, ''Multi-state Evaluation of Elements Important to the Verification of Remediation Technologies'', dated January 1999. FIU-HCET will also participate in a panel discussion on technology verification programs at the International Environmental Technology Expo '99.
Date:
April 30, 1999
Creator:
Ebadian, M.A.
Object Type:
Report
System:
The UNT Digital Library
The Hopkins County Echo (Sulphur Springs, Tex.), Vol. 204, No. 18, Ed. 1 Friday, April 30, 1999
Weekly newspaper from Sulphur Springs, Texas that includes local, state, and national news along with advertising.
Date:
April 30, 1999
Creator:
Keys, Scott & Lamb, Bill
Object Type:
Newspaper
System:
The Portal to Texas History
IC-Compatible Technologies for Optical MEMS
Optical Micro Electro Mechanical Systems (Optical MEMS) Technology holds the promise of one-day producing highly integrated optical systems on a common, monolithic substrate. The choice of fabrication technology used to manufacture Optical MEMS will play a pivotal role in the size, functionality and ultimately the cost of optical Microsystems. By leveraging the technology base developed for silicon integrated circuits, large batches of routers, emitters, detectors and amplifiers will soon be fabricated for literally pennies per part. In this article we review the current status of technologies used for Optical MEMS, as well as fabrication technologies of the future, emphasizing manufacturable surface micromachining approaches to producing reliable, low-cost devices for optical communications applications.
Date:
April 30, 1999
Creator:
Krygowski, T.W. & Sniegowski, J.J.
Object Type:
Article
System:
The UNT Digital Library
IMPROVED CORROSION RESISTANCE FOR ALUMINA REFRACTORY
In order to increase the efficiency of advanced coal-fired power systems, higher working fluid temperatures must be reached. Some system surfaces will have to be protected by covering them with corrosion-resistant refractories. Corrosion is the degradation of the material surfaces or grain boundaries by chemical reactions with melts, liquids, or gases causing loss of material and, consequently, a decrease in the strength of the structure. In order to develop methods of reducing corrosion, the microstructure that is attacked must be identified along with the mechanism and rates of attack. Earlier tests with several commercially available high-temperature castable refractories showed that the fused-alumina aggregate grains within the materials had the highest corrosion resistance of any of the castable materials. However, the cement holding the grains was easily attacked. Therefore, to improve the corrosion resistance and thermomechanical properties of alumina-based refractories, we attempted to change the cement to a more corrosion- and erosion-resistant bonding material through the addition of rare-earth oxides (REO). Phase diagrams were used to identify stable high-melting-temperature materials within the lanthanide-alumina series that could modify the bonding phase of the alumina-based refractory. Two mechanisms of reducing corrosion were investigated. One was the formation of corrosion-resistant layers within the refractory. …
Date:
April 30, 1999
Creator:
Hurley, John P. & Kleven, Patty L.
Object Type:
Report
System:
The UNT Digital Library
Interaction of plasmas with intense lasers
The interaction of plasmas with intense lasers is an excellent example of how different fields of physics are inter-connected. Invention of the laser and its ongoing development has allowed the creation and study of high temperature, dense matter in the laboratory. The results both advance the underlying plasma science and are relevant to many fields ranging from astrophysics to fusion and nonlinear physics. A brief overview of the interaction physics is given. Selected topics are discussed to illustrate the exciting progress in experimental, theoretical and computational investigations with focused laser intensities up to 10{sup 21} W/cm{sup 2}.
Date:
April 30, 1999
Creator:
Kruer, W.
Object Type:
Article
System:
The UNT Digital Library
Land Management Systems: Major Software Development Does Not Meet BLM's Business Needs
A letter report issued by the General Accounting Office with an abstract that begins "GAO recommended actions it believes the Bureau of Land Management (BLM) should take to improve its efforts to develop and deploy its Automated Land and Mineral Record System (ALMRS)."
Date:
April 30, 1999
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
The Message, Volume 35, April 30, 1999
Newsletter of Congregation Beth Yeshurun in Houston, including news and events, upcoming services, member announcements, editorials, and other information of interest to congregants.
Date:
April 30, 1999
Creator:
Congregation Beth Yeshurun (Houston, Tex.)
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Naturally fractured tight gas reservoir detection optimization
In March, work continued on characterizing probabilities for determining natural fracturing associated with the GGRB for the Upper Cretaceous tight gas plays. Structural complexity, based on potential field data and remote sensing data was completed. A resource estimate for the Frontier and Mesa Verde play was also completed. Further, work was also conducted to determine threshold economics for the play based on limited current production in the plays in the Wamsutter Ridge area. These analyses culminated in a presentation at FETC on 24 March 1999 where quantified natural fracture domains, mapped on a partition basis, which establish ''sweet spot'' probability for natural fracturing, were reviewed. That presentation is reproduced here as Appendix 1. The work plan for the quarter of January 1, 1999--March 31, 1999 comprised five tasks: (1) Evaluation of the GGRB partitions for structural complexity that can be associated with natural fractures, (2) Continued resource analysis of the balance of the partitions to determine areas with higher relative gas richness, (3) Gas field studies, (4) Threshold resource economics to determine which partitions would be the most prospective, and (5) Examination of the area around the Table Rock 4H well.
Date:
April 30, 1999
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
THE NGA-DOE GRANT TO EXAMINE CRITICAL ISSUES RELATED TO RADIOACTIVE WASTE AND MATERIALS DISPOSITION INVOLVING DOE FACILITIES
Through the National Governors' Association (NGA) project ''Critical Issues Related to Radioactive Waste and Materials Disposition Involving DOE Facilities'' NGA brings together Governors' policy advisors, state regulators, and DOE officials to examine critical issues related to the cleanup and operation of DOE nuclear weapons and research facilities. Topics explored through this project include: Decisions involving disposal of mixed, low-level, and transuranic (TRU) waste and disposition of nuclear materials; Decisions involving DOE budget requests and their effect on environmental cleanup and compliance at DOE facilities; Strategies to treat mixed, low-level, and transuranic (TRU) waste and their effect on individual sites in the complex; Changes to the FFCA site treatment plans as a result of proposals in the Department's Accelerating Cleanup: Paths to Closure plan and contractor integration analysis; Interstate waste and materials shipments; and Reforms to existing RCRA and CERCLA regulations/guidance to address regulatory overlap and risks posed by DOE wastes. The overarching theme of this project is to help the Department improve coordination of its major program decisions with Governors' offices and state regulators and to ensure such decisions reflect input from these key state officials and stakeholders. This report summarizes activities conducted during the quarter from February 1, 1999, …
Date:
April 30, 1999
Creator:
Beauchesne, Ann M.
Object Type:
Report
System:
The UNT Digital Library
The North Texas Daily (Denton, Tex.), Vol. 81, No. 108, Ed. 1 Friday, April 30, 1999
Student newspaper from the University of North Texas in Denton, Texas that includes local, state, national, and campus news along with advertising. Formerly The Campus Chat.
Date:
April 30, 1999
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History