States

Cartan calculus on quantum Lie algebras (open access)

Cartan calculus on quantum Lie algebras

A generalization of the differential geometry of forms and vector fields to the case of quantum Lie algebras is given. In an abstract formulation that incorporates many existing examples of differential geometry on quantum spaces we combine an exterior derivative, inner derivations, Lie derivatives, forms and functions au into one big algebra, the ``Cartan Calculus.``
Date: December 9, 1993
Creator: Schupp, P.; Watts, P. & Zumino, B.
Object Type: Article
System: The UNT Digital Library
Characterization of Zns-GaP Naon-composites (open access)

Characterization of Zns-GaP Naon-composites

It proved possible to produce consistent, high-quality nanocrystalline ZnS powders with grain sizes as small as 8 nm. These powders are nano-porous and are readily impregnated with GaP precursor, although inconsistently. Both crystal structure and small grain size of the ZnS can be maintained through the use of GaP. Heat treatment of the impregnated powders results in a ZnS-GaP composite structure where the grain sizes of the phases are on the order of 10--20 nm. Conventional powder processing should be able to produce optically dense ceramic compacts with improved mechanical properties and suitable IR transmission.
Date: December 9, 1993
Creator: Todd, V.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Final report on fiscal year 1992 activities for the environmental monitors line-loss study (open access)

Final report on fiscal year 1992 activities for the environmental monitors line-loss study

The work performed on this Environmental Monitors Line-Loss Study has been performed under Contract Numbers MLW-SVV-073750 and MFH-SVV-207554. Work on the task was initiated mid-December 1991, and this report documents and summarizes the work performed through January 18, 1993. The sections included in this report summarize the work performed on the Environmental Monitors Line-Loss Study. The sections included in this report are arranged to reflect individual sub-tasks and include: descriptions of measurement systems and procedures used to obtain cascade impactor samples and laser spectrometer measurements from multiple stacks and locations; information on data acquisition, analyses, assessment, and software; discussion of the analyses and measurement results from the cascade impactor and laser spectrometer systems and software used; discussion on the development of general test methods and procedures for line-loss determinations; an overall summary and specific conclusions that can be made with regard to efforts performed on this task during FY 1992 and FY 1993. Supporting information for these sections is included in this report as appendices.
Date: December 9, 1993
Creator: Kenoyer, J. L.
Object Type: Report
System: The UNT Digital Library
Household vehicles energy consumption 1991 (open access)

Household vehicles energy consumption 1991

The purpose of this report is to provide information on the use of energy in residential vehicles in the 50 States and the District of Columbia. Included are data about: the number and type of vehicles in the residential sector, the characteristics of those vehicles, the total annual Vehicle Miles Traveled (VMT), the per household and per vehicle VMT, the vehicle fuel consumption and expenditures, and vehicle fuel efficiencies. The data for this report are based on the household telephone interviews from the 1991 RTECS, conducted during 1991 and early 1992. The 1991 RTECS represents 94.6 million households, of which 84.6 million own or have access to 151.2 million household motor vehicles in the 50 States and the District of Columbia.
Date: December 9, 1993
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Investigation of the phase equilibria and phase transformations associated with the Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub y} superconductor (open access)

Investigation of the phase equilibria and phase transformations associated with the Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub y} superconductor

The solid solution region and reaction kinetics of the Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub y} (2212) superconductor were examined as a function of temperature and oxygen partial pressure. Crystallization studies from the glassy and molten states were undertaken to determine the phase transformation and kinetics associated with the formation of 2212 and other competing phases. Crystallization of nominal 2212 glasses was found to proceed in two steps with the formation of Bi{sub 2}Sr{sub 2{minus}x}Ca{sub x}CuO{sub y} (2201) and Cu{sub 2}O followed by Bi{sub 2}Sr{sub 3{minus}x}Ca{sub x}O{sub y}, CaO, and SrO. The 2212 phase converts from the 2201 phase with increasing temperatures. However, its formation below 800 C was kinetically limited. At 800 C and above, a nearly full conversion to the 2212 phase was achieved after only one minute although considerably longer anneal times were necessary for the system to reach equilibrium. In low oxygen partial pressures, the solidus is reduced to approximately 750 C. Solidification studies revealed an eutectic structure separating the incongruently melting 2212/2201 phases at high oxygen partial pressures from the congruently melting Bi{sub 2}Sr{sub 3{minus}x}Ca{sub x}O{sub y} (23x) and Bi{sub 2}Sr{sub 2{minus}x}Ca{sub x}O{sub y} (22x) phases present at low oxygen partial pressures. During solidification in various oxygen …
Date: December 9, 1993
Creator: Holesinger, T.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Plasma enhanced chemical vapor deposition of ZrO{sub 2} thin films (open access)

Plasma enhanced chemical vapor deposition of ZrO{sub 2} thin films

Amorphous ZrO{sub 2} thin films were deposited in an inductively coupled PECVD system using a Zr {beta}-diketonate, Zr(C{sub 11}H{sub 19}O{sub 2}){sub 4}, as the precursor. The deposits were air annealed at 900C for 5 min to get pure, single phase, oriented, polycrystalline {alpha}-ZrO{sub 2}. Feasibility of using 2 different types of reactors was investigated. The inductively heated horizontal reactor depositions at 600C had a lower deposition rate and the films were non-uniform in thickness with a columnar structure. The resistively heated vertical reactor depositions at 350C had a higher deposition rate and the films were more uniform in thickness with a fine grained microstructure. The statistical design was demonstrated as an effective technique to analyze the effect of process conditions on the rate of deposition and relative (h00) orientation. The factorial design was used to quantify the two responses in terms of the process variables and their mutual interactions. The statistical design for rate of deposition was found to correlate with the trends observed in classical design.
Date: December 9, 1993
Creator: Saravanan, Kolandaivelu
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Quantum groups, non-commutative differential geometry and applications (open access)

Quantum groups, non-commutative differential geometry and applications

The topic of this thesis is the development of a versatile and geometrically motivated differential calculus on non-commutative or quantum spaces, providing powerful but easy-to-use mathematical tools for applications in physics and related sciences. A generalization of unitary time evolution is proposed and studied for a simple 2-level system, leading to non-conservation of microscopic entropy, a phenomenon new to quantum mechanics. A Cartan calculus that combines functions, forms, Lie derivatives and inner derivations along general vector fields into one big algebra is constructed for quantum groups and then extended to quantum planes. The construction of a tangent bundle on a quantum group manifold and an BRST type approach to quantum group gauge theory are given as further examples of applications. The material is organized in two parts: Part I studies vector fields on quantum groups, emphasizing Hopf algebraic structures, but also introducing a ``quantum geometric`` construction. Using a generalized semi-direct product construction we combine the dual Hopf algebras A of functions and U of left-invariant vector fields into one fully bicovariant algebra of differential operators. The pure braid group is introduced as the commutant of {Delta}(U). It provides invariant maps A {yields} U and thereby bicovariant vector fields, casimirs and …
Date: December 9, 1993
Creator: Schupp, P.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
RHIC Real Time Data Link System (open access)

RHIC Real Time Data Link System

None
Date: December 9, 1993
Creator: Hartmann, H.; Oerter, B. R. & Peggs, S.
Object Type: Report
System: The UNT Digital Library
Winter Fuels Report: Week Ending December 3, 1993 (open access)

Winter Fuels Report: Week Ending December 3, 1993

The Winter Fuels Report is intended to provide concise, timely information to the industry, the press, policymakers, consumers, analysts, and State and local governments on the following topics: distillate fuel oil net production, imports and stocks on a US level and for all Petroleum Administration for Defense Districts (PADD) and product supplied on a US level; propane net production, imports and stocks on a US level and for PADD`s I, 11, and III; natural gas supply and disposition and underground storage for the US and consumption for all PADD`S; as well as selected National average prices. residential and wholesale pricing data for heating oil and propane for those States participating in the joint Energy Information Administration (EIA)/State Heating Oil and Propane Program; crude oil and petroleum price comparisons for the US and selected cities; and a 6-10 Day, 30-Day, and 90-Day outlook for temperature and precipitation and US total heating degree-days by city.
Date: December 9, 1993
Creator: unknown
Object Type: Report
System: The UNT Digital Library
CERCLA Site Assessment questions and answers (Qs&As) (open access)

CERCLA Site Assessment questions and answers (Qs&As)

This documents contains commonly asked questions and corresponding answers (Qs&As) on the CERCLA Site Assessment process. These questions were derived from DOE element responses to a solicitation calling for the identification of (unresolved) issues associated with the conduct of CERCLA site assessments, and from inquiries received during a series of Site Assessment Workshops provided by the Environmental Protection Agency (EPA) and the Office of Environmental Guidance, RCRA/CERCLA Division (EH-231). Answers to these questions were prepared by EH-231 in cooperation with the EPA Federal Facilities Team in Office of Solid Waste and Emergency Response, Site Assessment Branch, and in coordination with the Office of Environmental Compliance, Facilities Compliance Division (EH-222).
Date: November 9, 1993
Creator: Traceski, T. T.
Object Type: Report
System: The UNT Digital Library
The Executive Office of the President: An Historical Overview (open access)

The Executive Office of the President: An Historical Overview

This report provides an An Historical Overview about The Executive Office of the President. It consists of a group of federal agencies immediately serving the President.
Date: November 9, 1993
Creator: Relyea, Harold C.
Object Type: Report
System: The UNT Digital Library
Joule heating of the ITER TF cold structure: Effects of vertical control coil currents and ELMS (open access)

Joule heating of the ITER TF cold structure: Effects of vertical control coil currents and ELMS

The toroidal field coil and support structures for ITER are maintained at cryogenic temperatures. The time-varying currents in the poloidal field coil system will induce eddy currents in these structures. The associated Joule dissipation will cause local heating and require heat removal which will show up as a load on the cryogenic system. Studies of Joule heating of the ITER TF cold structure (TFCS) due to the currents in the poloidal field coil system are presented. The two regimes considered in this study are the plasma vertical stability control and the Edge Loss Mode (ELM) events. The 3-D, thin-shell, eddy current program, EDDYCUFF was used to analyze the eddy currents and Joule losses in the cold structure. The current versus time scenarios were defined. Four control coil options were studied. All schemes use coils external to the TF cold structure. Analyses of power depositions during the plasma vertical stability control were performed for each of the four options. For each of these options three different recovery times were assumed. The times were 3, 1, and 1/3 seconds. Sets of four sequential ELMs, as well as isolated ELMs have been studied for various sets of active PF coils. The results showed …
Date: November 9, 1993
Creator: Radovinsky, A. & Pillsbury, R. D. Jr.
Object Type: Report
System: The UNT Digital Library
Method for Simultaneous Use of a Single Additive for Coal Flotation, Dewatering, and Reconstitution (open access)

Method for Simultaneous Use of a Single Additive for Coal Flotation, Dewatering, and Reconstitution

A single dose of additive contributes to three consecutive fine coal unit operations, i.e., flotation, dewatering and reconstitution, whereby the fine coal is first combined with water in a predetermined proportion so as to formulate a slurry. The slurry is then mixed with a heavy hydrocarbon-based emulsion in a second predetermined proportion and at a first predetermined mixing speed and for a predetermined period of time. The conditioned slurry is then cleaned by a froth flotation method to form a clean coal froth and then the froth is dewatered by vacuum filtration or a centrifugation process to form reconstituted products that are dried to dust-less clumps prior to combustion.
Date: November 9, 1993
Creator: Wen, Wu-Wey; Gray, McMahan L. & Champagne, Kenneth J.
Object Type: Patent
System: The UNT Digital Library
Mixed Waste Working Group report (open access)

Mixed Waste Working Group report

The treatment of mixed waste remains one of this country`s most vexing environmental problems. Mixed waste is the combination of radioactive waste and hazardous waste, as defined by the Resource Conservation and Recovery Act (RCRA). The Department of Energy (DOE), as the country`s largest mixed waste generator, responsible for 95 percent of the Nation`s mixed waste volume, is now required to address a strict set of milestones under the Federal Facility Compliance Act of 1992. DOE`s earlier failure to adequately address the storage and treatment issues associated with mixed waste has led to a significant backlog of temporarily stored waste, significant quantities of buried waste, limited permanent disposal options, and inadequate treatment solutions. Between May and November of 1993, the Mixed Waste Working Group brought together stakeholders from around the Nation. Scientists, citizens, entrepreneurs, and bureaucrats convened in a series of forums to chart a course for accelerated testing of innovative mixed waste technologies. For the first time, a wide range of stakeholders were asked to examine new technologies that, if given the chance to be tested and evaluated, offer the prospect for better, safer, cheaper, and faster solutions to the mixed waste problem. In a matter of months, the …
Date: November 9, 1993
Creator: unknown
Object Type: Report
System: The UNT Digital Library
NAFTA: A Broad Economic Perspective (open access)

NAFTA: A Broad Economic Perspective

Most economists believe that the main economic benefit of NAFTA will be that, over time, it will increase productivity and incomes in the United States, Mexico and Canada. In this view, living standards of all three countries will be higher than without a NAFTA. In the near term, some reallocation of resources will occur within each country, generating gains for some producers and costs for others. New industries emerge, some industries expand, some contract, and some die. Since the Mexican and Canadian economies are small relative to the U.S. economy, it is expected that both the aggregate benefits and costs of the NAFTA to the United States will be relatively small.
Date: November 9, 1993
Creator: Wilson, Arlene
Object Type: Report
System: The UNT Digital Library
Optimization of neutron source (open access)

Optimization of neutron source

I consider here the optimization of the two component neutron source, allowing beam species and energy to vary. A simple model is developed, based on the earlier publications, that permits the optimum to be obtained simply. The two component plasma, with one species of hot ion (D{sup +} or T{sup +}) and the complementary species of cold ion, is easy to analyze in the case of a spatially uniform cold plasma, as to good approximation the total number of hot ions is important but not their spatial distribution. Consequently, the optimization can ignore spatial effects. The problem of a plasma with both types of hot ions and cold ions is rather more difficult, as the neutron production by hot-hot interactions is sensitive to their spatial distributions. Consequently, consideration of this problem will be delayed to a future memorandum. The basic model is that used in the published articles on the two-component, beam-plasma mirror source. I integrate the Fokker-Planck equation analytically, obtaining good agreement with previous numerical results. This simplifies the optimization, by providing a functional form for the neutron production. The primary result is expressed in terms of the power efficiency: watts of neutrons/watts of primary power. The latter includes …
Date: November 9, 1993
Creator: Hooper, E. B.
Object Type: Report
System: The UNT Digital Library
Petroleum marketing monthly, November 1993 (open access)

Petroleum marketing monthly, November 1993

The Petroleum Marketing Monthly (PMM) is designed to give information and statistical data about a variety of crude oils and refined petroleum products. The publication provides statistics on crude oil costs and refined petroleum products sales for use by industry, government, private sector analysts, educational institutions, and consumers. Data on crude oil include the domestic first purchase price, the f.o.b. and landed costs of imported crude oil, and the refiner`s acquisition cost of crude oil. Sales data for motor gasoline, distillates, residuals, aviation fuels, kerosene, and propane are presented.
Date: November 9, 1993
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Solar collector manufacturing activity, 1992 (open access)

Solar collector manufacturing activity, 1992

This report presents data provided by US-based manufacturers and importers of solar collectors. Summary data on solar thermal collector shipments are presented for the years 1974 through 1992. Summary data on photovoltaic cell and module shipments are presented for the years 1982 through 1992. Detailed information for solar thermal collectors and photovoltaic cells and modules are presented for 1992. Appendix A describes the survey methodology. Appendix B contains the 1992 survey forms and instructions. Appendices C and D list the companies that responded to the 1992 surveys and granted permission for their names and addresses to appear in the report. Appendix E provides selected tables from this report with data shown in the International System of Units (SI) metric units. Appendix F provides an estimate of installed capacity and energy production from solar collectors for 1992.
Date: November 9, 1993
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Texas Register, Volume 18, Number 84, Part I, Pages 8034-8182, November 9, 1993 (open access)

Texas Register, Volume 18, Number 84, Part I, Pages 8034-8182, November 9, 1993

A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date: November 9, 1993
Creator: Texas. Secretary of State.
Object Type: Journal/Magazine/Newsletter
System: The Portal to Texas History
Texas Register, Volume 18, Number 84, Part II, Pages 8183-8281, November 9, 1993 (open access)

Texas Register, Volume 18, Number 84, Part II, Pages 8183-8281, November 9, 1993

A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date: November 9, 1993
Creator: Texas. Secretary of State.
Object Type: Journal/Magazine/Newsletter
System: The Portal to Texas History
Aquaculture and the Federal Role (open access)

Aquaculture and the Federal Role

Aquaculture is broadly defined as the production of fish, shellfish, and aquatic plants in a controlled environment. This report discusses the growth of U.S. aquaculture in the decade preceding 1993, and the subsequent debate about what role, if any, the Federal Government should play in supporting the industry. Relevant legislation and policies are also discussed.
Date: September 9, 1993
Creator: Buck, Eugene H. & Becker, Geoffrey S.
Object Type: Report
System: The UNT Digital Library
Beneficially reusing LLRW the Savannah River Site Stainless Steel Program (open access)

Beneficially reusing LLRW the Savannah River Site Stainless Steel Program

With 68 radioactively contaminated excess Process Water Heat Exchangers the Savannah River Site launched its program to turn potential LLRW metal liabilities into assets. Each Heat Exchanger contains approximately 100 tons of 304 Stainless Steel and could be disposed as LLRW by land burial. Instead the 7000 tons of metal will be recycled into LLRW, HLW, and TRU waste containers thereby eliminating the need for near term land disposal and also eliminating the need to add more clean metal to the waste stream. Aspects of the partnership between DOE and Private Industry necessary to accomplish this new mission are described. A life cycle cost analysis associated with past practices of using carbon steel containers to indefinitely store material (contributing to the creation of today`s legacy waste problems) is presented. The avoided cost calculations needed to support the economics of the ``Indifference`` decision process in assessing the Beneficial Reuse option relative to the Burial option are described.
Date: September 9, 1993
Creator: Boettinger, W. L.
Object Type: Article
System: The UNT Digital Library
Changes in science: An example (open access)

Changes in science: An example

This report discusses the frontiers of science in today world.
Date: September 9, 1993
Creator: Slansky, R.
Object Type: Article
System: The UNT Digital Library
The effect of spacer ribs on Ledinegg type flow instabilities (open access)

The effect of spacer ribs on Ledinegg type flow instabilities

An experimental program has been completed which evaluated the effect of a flow obstruction in a heated channel on the onset of flow instability (OBI). The test channel was rectangular (80 {times} 3 mm), heated on one surface, and equipped with view ports. Tests were conducted in a flow controlled mode at heat fluxes of 370 kW/M{sup 2}, and 610 kW/m{sup 2}. Direct comparisons were made between the demand curve minimum for the unobstructed channel and a channel equipped with a 2.07 mm wide rib that was parallel to the flow and in contact with the heated surface. Data at OFI is presented in the nondimensional terms Of Q{sub ratio} (ratio of heat flux applied to heat flux required to achieve saturated liquid conditions at the exit), and the local Stanton number at the channel exit for each channel arrangement. The Q{sub ratio} and Stanton number values for the unobstructed channel and the rib equipped channel are then compared to produce an estimate of the rib effect.
Date: September 9, 1993
Creator: Coutts, D. A.
Object Type: Thesis or Dissertation
System: The UNT Digital Library