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Alternative Gate Dielectrics on Semiconductors for MOSFET Device Applications
We have investigated the synthesis and properties of deposited oxides on Si and Ge for use as alternative gate dielectrics in MOSFET applications. The capacitance and leakage current behavior of polycrystalline Y{sub 2}O{sub 3} films synthesized by pulsed-laser deposition is reported. In addition, we also discuss the growth of epitaxial oxide structures. In particular, we have investigated the use of silicide termination for oxide growth on (001) Si using laser-molecular beam epitaxy. In addition, we discuss a novel approach involving the use of hydrogen to eliminate native oxide during initial dielectric oxide nucleation on (001) Ge.
Date:
December 6, 1999
Creator:
Norton, D. P.; Budai, J. D.; Chisholm, M. F.; Pennycook, S. J.; McKee, R.; Walker, F. et al.
Object Type:
Article
System:
The UNT Digital Library
Altus Times (Altus, Okla.), Vol. 100, No. 223, Ed. 1 Monday, December 6, 1999
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 6, 1999
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Alvin Sun (Alvin, Tex.), Vol. 108, No. 136, Ed. 1 Monday, December 6, 1999
Weekly newspaper from Alvin, Texas that includes local, state, and national news along with advertising.
Date:
December 6, 1999
Creator:
Schwind, Jim & Holton, Kathleen
Object Type:
Newspaper
System:
The Portal to Texas History
Appropriations for FY2000: Interior and Related Agencies
Appropriations are one part of a complex federal budget process that includes budget resolutions, appropriations (regular, supplemental, and continuing) bills, rescissions, and budget reconciliation bills. This report is a guide to one of the 13 regular appropriations bills that Congress passes each year. It is designed to supplement the information provided by the House and Senate Appropriations Subcommittees on Interior and Related Agencies Appropriations.
Date:
December 6, 1999
Creator:
Greenwood, Alfred R.
Object Type:
Report
System:
The UNT Digital Library
Appropriations for FY2000: U.S. Department of Agriculture and Related Agencies
Appropriations are one part of a complex federal budget process that includes budget resolutions, appropriations (regular, supplemental, and continuing) bills, rescissions, and budget reconciliation bills. This report is a guide to one of the 13 regular appropriations bills that Congress passes each year. It is designed to supplement the information provided by the House and Senate Appropriations Subcommittees on Agriculture Appropriations.
Date:
December 6, 1999
Creator:
Chite, Ralph M.
Object Type:
Report
System:
The UNT Digital Library
Assessment of Structural Resistance of building 4862 to Earthquake and Tornado Forces [SEC 1 and 2]
This report presents the results of work done for Hanford Engineering Laboratory under contract Y213-544-12662. LATA performed an assessment of building 4862 resistance to earthquake and tornado forces.
Date:
December 6, 1999
Creator:
METCALF, I.L.
Object Type:
Report
System:
The UNT Digital Library
An Audit of the Financial Statements of the Teacher Retirement System of Texas Year Ended August 31, 1999
Report of the Texas State Auditor's Office related to the Teacher Retirement System's (System) fiscal year 1999 financial statements, which are materially correct in accordance with generally accepted accounting principles.
Date:
December 6, 1999
Creator:
Texas. Office of the State Auditor.
Object Type:
Report
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 78, No. 31, Ed. 1 Monday, December 6, 1999
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
December 6, 1999
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
Comparison of the crevice corrosion resistance of Alloys 625 and 22 in concentrated chloride solution from 60 to 95 degrees C
The effects of electrolyte composition and oxide film age on the crevice corrosion properties of alloys 625 and 22 were studied at temperatures ranging from 60 to 95 C in concentrated chloride electrolytes. Critical potentials were determined using conventional current density thresholds and comparisons were made between 625 and 22 on the basis of these critical potentials. Air aged 22 specimens exhibited the highest resistance to crevice corrosion at 95 C in terms of critical crevice potentials, while freshly polished 22 exhibited the lowest resistance. Studies over the entire, temperature range showed that air aged 22 is more resistant to crevice corrosion than air aged 625 as evidenced by higher critical crevice potentials. As the temperature was lowered from 95 to 8O C, critical crevice potentials for 22 either approached or exceeded experimentally determined Cr (Mo, Ni) transpassive potentials.
Date:
December 6, 1999
Creator:
Kehler, B. A.; Illevbare, G. O. & Scully, J. R.
Object Type:
Article
System:
The UNT Digital Library
Energy Transfer of Excitons Between Quantum Wells Separated by a Wide Barrier
We present a microscopic theory of the excitonic Stokes and anti-Stokes energy transfer mechanisms between two widely separated unequal quantum wells with a large energy mismatch ({Delta}) at low temperatures (T). Exciton transfer through dipolar coupling, photon-exchange coupling and over-barrier ionization of the excitons through exciton-exciton Auger processes are examined. The energy transfer rate is calculated as a function of T and the center-to-center distance d between the two wells. The rates depend sensitively on T for plane-wave excitons. For located excitons, the rates depend on T only through the T-dependence of the localization radius.
Date:
December 6, 1999
Creator:
LYO,SUNGKWUN K.
Object Type:
Article
System:
The UNT Digital Library
Engineering Task Plan for Routine Engineering Support for Core Sampler System
Routine engineering support is required during normal operation of the core sampler trucks and associated ancillary equipment. This engineering support consists of, but is not limited to, troubleshooting operation problems, correcting minor design problems, assistance with work package preparation, assistance with procurement, fabrication shop support, planning of engineering tasks and preparation of associated Engineering Task Plans (ETP) and Engineering Service Requests (ESR). This ETP is the management plan document for implementing routine engineering support. Any additional changes to the scope of this ETP shall require a Letter of Instruction from Lockheed Martin Hanford Corp (LMHC). This document will also be the Work Planning Document for Development Control (HNF 1999a). The scope of this task will be to provide routine engineering support for Characterization equipment as required to support Characterization Operations. A task by task decision will be made by management to determine which tasks will be done per this ETP and if additional ETPs and/or ESRs are required. Due to the unique nature of this task, the only identifiable deliverable is to provide support as requested. Deliverables will be recorded in a task logbook as activities are identified. ESRs will be generated for tasks that require more than 40 person …
Date:
December 6, 1999
Creator:
Boger, R. M.
Object Type:
Report
System:
The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Monday, December 6, 1999
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 6, 1999
Creator:
Bush, Kent
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Feasibility of High Yield / High Gain NIF Capsules
Our original ignition ''point designs'' (circa 1992) for the National Ignition Facility (NIF) were made energetically conservative to provide margin for uncertainties in laser absorption, x-ray conversion efficiency and hohlraum-capsule coupling. Since that time, extensive experiments on Nova and Omega and their related analysis indicate that NIF coupling efficiency may be almost ''as good as we could hope for''. Given close agreement between experiment and theory/modeling, we can credibly explore target enhancements which couple more of NIF's energy to an ignition capsule. We find that 3-4X increases in absorbed capsule energy appear possible, providing a potentially more robust target and {approx}10X increase in capsule yield.
Date:
December 6, 1999
Creator:
Suter, L.; Rothenberg, J.; Munro, D.; Van Wonterghem, B.; Haan, S. & Lindl, J.
Object Type:
Article
System:
The UNT Digital Library
Financial Management: Financial Management Weaknesses at the Department of Education
Testimony issued by the General Accounting Office with an abstract that begins "GAO discussed its review of the independent auditors' reports on the Department of Education's financial statements covering fiscal year (FY) 1998, focusing on: (1) weaknesses in the financial reporting process; (2) inadequate reconciliations of financial accounting records; and (3) inadequate controls over information systems."
Date:
December 6, 1999
Creator:
United States. General Accounting Office.
Object Type:
Text
System:
The UNT Digital Library
Global Warming: A Science Overview for the A/C Industry
Fossil fuels (i.e., coal, oil, and natural gas) provide about 85% of the world's energy, sustaining our standard-of-living. They are inexpensive, transportable, safe, and relatively abundant. At the same time, their use contributes to problems such as air quality and acid rain that are being addressed through various control efforts and to the problem of global warming, which is now being considered by governments of the world. This talk will focus on six key aspects of the scientific findings that are leading to proposals for significant limitation of the emissions of fossil-fuel-derived carbon dioxide and limitations on emissions of other greenhouse gases that can influence the global climate, including substances used in the refrigeration and air-conditioning industries.
Date:
December 6, 1999
Creator:
MacCracken, M.C.
Object Type:
Article
System:
The UNT Digital Library
High-resolution spectroscopic diagnostics of very high-temperature plasmas in the hard x-ray regime
Motivated by the need for establishing a reliable database useful for the application of x-ray spectroscopic tools for the diagnostic of very high temperature plasmas, high-resolution crystal spectrometer measurements have been performed investigating the characteristic K-shell radiation of highly charged krypton and xenon. The measurements, which have been performed at the Electron-Beam-Ion-Trap (EBIT) facility of the Lawrence Livermore National Laboratory, include the investigation of the n = 2 {yields} 1 transitions in heliumlike krypton (Kr{sup 34+}) and innershell excited lithiumlike krypton (Kr{sup 33+}) utilizing a conventional reflection-type crystal spectrometer of von Hamos geometry. The electron-excitation-energy selective measurements map the contribution of the dielectronic recombination lines providing the means of accurate interpretation of the line profiles of the characteristic K{alpha} x-ray emission of plasmas. The high-resolution measurements of the n = 2 {yields} 1 transitions in heliumlike xenon (Xe{sup 52+}) and hydrogenlike xenon (Xe{sup 53+}) were based on a new transmission-type crystal spectrometer of DuMond geometry. The resolving power of the developed spectrometer was sufficient for charge state specific observation allowing the determination of the electron-impact excitation cross section for the hydrogen- and heliumlike K{alpha} transitions. The disagreement with theoretically predicted values is a measure of the magnitude of the Breit …
Date:
December 6, 1999
Creator:
Widmann, K
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
[Letter from Donna Davis to Mike Allen, December 6, 1999]
Letter from Donna Davis to Mike Allen discussing materials shared between the Another Way organization and the Texas Human Rights Foundation.
Date:
December 6, 1999
Creator:
Davis, Donna
Object Type:
Letter
System:
The Portal to Texas History
[Letter from Howard L. Glass to Raymond McNeel]
Letter from Howard L. Glass to Raymond McNeel discussing minutes and proposed bylaws. Included is a fax cover sheet from Howard Glass to Al Daniels.
Date:
December 6, 1999
Creator:
unknown
Object Type:
Letter
System:
The UNT Digital Library
[Letter from Howard L. Glass to Raymond McNeel]
Letter from Howard L. Glass to Raymond McNeel on December 6, 1999, discussing minutes and the proposed bylaws. Included is a fax cover sheet from Howard Glass to Al Daniels.
Date:
December 6, 1999
Creator:
unknown
Object Type:
Letter
System:
The UNT Digital Library
Marketing and promoting solar water heaters to home builders
This is the final report of a four-task project to develop a marketing plan designed for businesses interested in marketing solar water heaters in the new home industry. This report outlines suggested marketing communication materials and other promotional tools focused on selling products to the new home builder. Information relevant to promoting products to the new home buyer is also included.
Date:
December 6, 1999
Creator:
Keller, C. & Ghent, P.
Object Type:
Report
System:
The UNT Digital Library
Multi-method characterization of low-level radioactive waste at two Sandia National Laboratories environmental restoration sites
This paper discusses the application of multiple characterization methods to radioactive wastes generated by the Sandia National Laboratories/New Mexico (SNL/NM) Environmental Restoration (ER) Project during the excavation of buried materials at the Classified Waste Landfill (CWLF) and the Radioactive Waste Landfill (RWL). These waste streams include nuclear weapon components and other refuse that are surface contaminated or contain sealed radioactive sources with unknown radioactivity content. Characterization of radioactive constituents in RWL and CWLF waste has been problematic, due primarily to the lack of documented characterization data prior to burial. A second difficulty derives from the limited information that ER project personnel have about weapons component design and testing that was conducted in the early days of the Cold War. To reduce the uncertainties and achieve the best possible waste characterization, the ER Project has applied both project-specific and industry-standard characterization methods that, in combination, serve to define the types and quantities of radionuclide constituents in the waste. The resulting characterization data have been used to develop waste profiles for meeting disposal site waste acceptance criteria.
Date:
December 6, 1999
Creator:
Johnson, C.E. Jr.; Galloway, R.B. & Dotson, P.W.
Object Type:
Article
System:
The UNT Digital Library
National Ignition Facility draft supplemental environmental impact statement to the SSM PEIS
The US Department of Energy (DOE) is constructing the National Ignition Facility (NIF) at Lawrence Livermore National Laboratory (LLNL) at Livermore, California. In 1997, the buried capacitors containing polychlorinated biphenyls (PCBs) were discovered during site excavation for the NIF. The capacitors and contaminated soil were cleaned up to levels protective of human health and the environment in accordance with the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) and its implementing regulations and in consultation with state and federal regulators. In october 1997, DOE entered into a Joint Stipulation and Order approved and entered as an order of the court on October 27, 1997, in partial settlement of the lawsuit Civ. No. 97-936 (SS) (D.D.C.), ''Natural Resources Defense Council et al. v Richardson et al.''. Paragraph 7 of the Joint Stipulation and Order provides that a Supplemental Environmental Impact Statement (SEIS) shall evaluate ''the reasonably foreseeable significant adverse environmental impacts of continuing to construct and of operating NIF at LLNL with respect to any potential or confirmed contamination in the area by hazardous, toxic, and/or radioactive materials''. On September 25, 1998, DOE announced in the Federal Register the agency's intent to prepare an SEIS for the NIF portion (Volume 3, …
Date:
December 6, 1999
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
[News Clip: Mars lost]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, covering a news story about NASA losing contact with the Mars Lander and recent mission failures. This story includes an interview with an unidentified NASA representative, animated sequences, a press conference with NASA, an interview with a critic of NASA's current approach, and a White House press conference. This footage was broadcast at 5pm.
Date:
December 6, 1999
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
Novel, Integrated Reactor/Power Conversion System. Quarterly Report, September 1 - November 30, 1999
The desired design objectives and operation parameters were determined and system characteristics to be investigated were identified together with critical issues. Specific tasks were outlined and communicated to the performing personnel.
Date:
December 6, 1999
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library