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[Confidential Letter: Maison to Martin]
A confidential letter from Don Maison, from the AIDS Services of Dallas, to Jack Martin from the Texas Board of Law Examiners.
Date:
July 14, 1994
Creator:
AIDS Services of Dallas
Object Type:
Letter
System:
The UNT Digital Library
Evaluation of the Cask Transportation Facility Modifications (CTFM) compliance to DOE order 6430.1A
This report was prepared to evaluate the compliance of Cask Transportation Facility Modifications (CTFM) to DOE Order 6430.1A.
Date:
July 14, 1999
Creator:
ARD, K.E.
Object Type:
Report
System:
The UNT Digital Library
XAF/XANES studies of plutonium-loaded sodalite/glass composite waste forms.
A sodalite/glass ceramic waste form has been developed to immobilize highly radioactive nuclear wastes in chloride form, as part of an electrochemical cleanup process. Simulated waste forms have been fabricated which contain plutonium and are representative of the salt from the electrometallurgical process to recover uranium from spent nuclear fuel. X-ray absorption fine structure spectroscopy (XAFS) and x-ray absorption near-edge spectroscopy (XANES) studies were performed to determine the location, oxidation state and form of the plutonium within these waste forms. Plutonium, in the non-fission-element case, was found to segregate as plutonium(IV) oxide with a crystallite size of at least 20 nm. With fission elements present, the crystallite size was about 2 nm. No plutonium was observed within the sodalite or glass in the waste form.
Date:
July 14, 1999
Creator:
Aase, S. B.; Kropf, A. J.; Lewis, M. A.; Reed, D. T. & Richmann, M. K.
Object Type:
Article
System:
The UNT Digital Library
High energy photon-neutrino interactions
A general decomposition of the amplitudes for the 2 {r_arrow} 2 processes {gamma}{nu} {r_arrow} {gamma}{nu} and {gamma}{gamma} {r_arrow} {nu}{bar {nu}} is obtained using gauge invariance and Bose symmetry. The restrictions implied by this decomposition are investigated for the reaction {gamma}{gamma} {r_arrow} {nu}{bar {nu}} by computing the one-loop helicity amplitudes in the standard model. In the center of mass, where {radical}s = 2{omega}, the cross section grows roughly as {omega}{sup 6} up to the threshold for W-boson production, {radical}s = 2m{sub W}. Astrophysical implications of very high energy photon-neutrino interactions are discussed.
Date:
July 14, 1998
Creator:
Abbasabadi, A.; Devoto, A.; Dicus, D.A. & Repko, W.W.
Object Type:
Report
System:
The UNT Digital Library
Oral History Interview with J. Lloyd Abbot, March 14, 1998
The National Museum of the pacific War presents an oral interview with J. Lloyd Abbot. Abbot received a commission in the Navy in 1939 and served two months aboard the USS Enterprise (CV-6) before being tasked to bring an old destroyer, the USS Gilmer (DD-233), out of mothballs. He stayed on it for a while before going to flight school in Pensacola. He earned his wings in November, 1941. Due to some accidents and illnesses, Abbot was disallowed to fly from carriers. He was assigned to shore-based anti-submarine patrol squadron, VS-1D-14, in December 1942. In April 1943, the squadron was divided into two and Abbot was placed in command of VS-66 on Wallis Island. At the end of 1943, his squadron inherited some SBD dive bombers and they moved to a new base on Tarawa. In March 1944. Abbot was assigned to the staff of the Chief of Naval Air Training at Pensacola. He was there when the war ended. After the war, Abbot commanded VF-41 aboard the USS Franklin D. Roosevelt (CV-42). Throughout his career, he served as the operation officer aboard carriers, worked at the Pentagon, was commander of the Antarctic mission and commander of a carrier division …
Date:
March 14, 1998
Creator:
Abbot, J. Lloyd
Object Type:
Sound
System:
The Portal to Texas History
Oral History Interview with J. Lloyd Abbot, March 14, 1998
The National Museum of the pacific War presents an oral interview with J. Lloyd Abbot. Abbot received a commission in the Navy in 1939 and served two months aboard the USS Enterprise (CV-6) before being tasked to bring an old destroyer, the USS Gilmer (DD-233), out of mothballs. He stayed on it for a while before going to flight school in Pensacola. He earned his wings in November, 1941. Due to some accidents and illnesses, Abbot was disallowed to fly from carriers. He was assigned to shore-based anti-submarine patrol squadron, VS-1D-14, in December 1942. In April 1943, the squadron was divided into two and Abbot was placed in command of VS-66 on Wallis Island. At the end of 1943, his squadron inherited some SBD dive bombers and they moved to a new base on Tarawa. In March 1944. Abbot was assigned to the staff of the Chief of Naval Air Training at Pensacola. He was there when the war ended. After the war, Abbot commanded VF-41 aboard the USS Franklin D. Roosevelt (CV-42). Throughout his career, he served as the operation officer aboard carriers, worked at the Pentagon, was commander of the Antarctic mission and commander of a carrier division …
Date:
March 14, 1998
Creator:
Abbot, J. Lloyd
Object Type:
Text
System:
The Portal to Texas History
Direct Measurement of A{sub c} using Inclusive Charm Tagging at the SLD Detector
We report a new measurement of A{sub c} using data obtained by SLD in 1993-98. This measurement uses a vertex tag technique, where the selection of a c hemisphere is based on the reconstructed mass of the charm hadron decay vertex. The method uses the 3D vertexing capabilities of SLD's CCD vertex detector and the small and stable SLC beams to obtain a high c-event tagging efficiency and purity of 28% and 82%, respectively. Charged kaons identified by the CRID detector and the charge of the reconstructed vertex provide an efficient quark-antiquark tag, with the analyzing power calibrated from the data. We obtain a preliminary result of A{sub c} = 0.603 {+-} 0.028 {+-} 0.023.
Date:
July 14, 1999
Creator:
Abe, K
Object Type:
Report
System:
The UNT Digital Library
Current Performance of the SLD VXD3
During 1996, the SLD collaboration completed construction and began operation of a new charge-coupled device (CCD) vertex detector (VXD3). Since then, its performance has been studied in detail and a new topological vertexing technique has been developed. In this paper, we discuss the design of VXD3, procedures for aligning it, and the tracking and vertexing improvements that have led to its world-record performance.
Date:
September 14, 1999
Creator:
Abe, Toshinori
Object Type:
Report
System:
The UNT Digital Library
[Letter from Julie Abel to William McCarter, June 14, 1995]
Letter from Julie Abel to William McCarter acknowledging two enclosed original grant copies for NTIEVA.
Date:
June 14, 1995
Creator:
Abel, Julie
Object Type:
Letter
System:
The UNT Digital Library
[RE: Arts Education Assessment Consortium, September 14, 1994]
Photocopy of a letter from Julie Abel, the Getty Center, to the Regional Institute Directors, in regards to the upcoming arts assessment. The Arts Education Assessment Consortium, AEAC, is administered by the Council of Chief State School Officers to all the RIG states. The Center is providing support to the AEAC to develop assessment prototypes in the visual and performing arts and believes that if the DBAE, discipline-based art education, is embedded in the assessment prototypes it will strengthen the impact within the state and nationally. A list of state contacts is attached to the letter.
Date:
September 14, 1994
Creator:
Abel, Julie
Object Type:
Letter
System:
The UNT Digital Library
[RE: Goals 2000 Arts Education Partnership Meeting Notes]
Photocopy of a memo from Julie Abel, program associate of the Getty Center for Education in the Arts, to the Regional Institute Grant Directors. The memo is in regards to the key points and recommendations from the September 20, 1996 Goals 2000 Arts Educational Leadership fund meeting. Attached with the memo is the meeting report.
Date:
October 14, 1996
Creator:
Abel, Julie
Object Type:
Letter
System:
The UNT Digital Library
[RE: Ground Transpiration Information]
A memo from Julie Abel, program associate for Getty Center for Education in the Arts, to the participants in the Regional Institute Directors' Meeting. The memo is in regards to prior correspondence from Vicki Rosenberg, who gave the directors information on the upcoming director's meeting, Abel's memo is about ground transportation for the directors from the Santa Barbara airport to the El Encanto Hotel.
Date:
January 14, 1992
Creator:
Abel, Julie
Object Type:
Letter
System:
The UNT Digital Library
[RE: Surf the Net for the first Rig Directors Forum!]
E-mail correspondence from Julie Abel, Program Associate, Getty Center for Education in the Arts, to the Regional Institute Directors. The e-mail is in regards to the January 1995 Director's meeting about findings from the 1994 Cross-Site report as a way to begin communicating in cyberspace. Abel requests that the directors share their thoughts and ideas about and solutions to major issues discussed in the report between March 15 and April 14. cc'd in the letter are Julie Abel, Candy Borland, David Pankratz, Blanche Rubin, Miki Baumgarten, Lani Duke, Vicki Rosenberg and Brent Wilson.
Date:
April 14, 1995
Creator:
Abel, Julie
Object Type:
Letter
System:
The UNT Digital Library
[Letter to Dr. R. William McCarter from Julie Anne Abel, with attached grant offer letter, budget, guidelines, and timeline - June 14, 1995]
A letter to Dr. R. William McCarter from Julie Anne Abel regarding a grant from the Getty Education Institute for the Arts to the North Texas Institute for Educators on the Visual Arts (NTIEVA). Attached documents appear as follows: Grant offer letter; "Approved FY96 Budget"; "FY96 Reporting Guidelines"; "FY97 Grant Guidelines and Application Procedures"; "FY96 RIG Travel Fund Grant Guidelines"; and "Important Dates."
Date:
June 14, 1995
Creator:
Abel, Julie A.
Object Type:
Letter
System:
The UNT Digital Library
[Letter from Julie Anne Abel to Nancy Berry, July 14, 1997]
A letter from Julie Anne Abel to Nancy Berry about clarifying objects for a proposal for the National Center for Art Museum/School Collaborations during the 1998 fiscal year. Attached documents include a letter from Nancy Berry to Julie Anne Abel and Vicki Rosenberg.
Date:
July 14, 1997
Creator:
Abel, Julie Anne
Object Type:
Letter
System:
The UNT Digital Library
[E-mail from Julie Anne Abel to D. Jack Davis and R. William McCarter, September 14, 1994]
An e-mail from Julie Anne Abel to D. Jack Davis and R. William McCarter about informing them that the Getty Center for Education in the Arts has approved their National Specialty Program development grant. Attached document is a budget.
Date:
September 14, 1994
Creator:
Abel, Julie Anne
Object Type:
Letter
System:
The UNT Digital Library
300 Degree C GaN/AlGaN Heterojunction Bipolar Transistor
A GaN/AIGaN heterojunction bipolar transistor has been fabricated using C12/Ar dry etching for mesa formation. As the hole concentration increases due to more efficient ionization of the Mg acceptors at elevated temperatures (> 250oC), the device shows improved gain. Future efforts which are briefly summarized. should focus on methods for reducing base resistance.
Date:
October 14, 1998
Creator:
Abernathy, C. R.; Baca, A. G.; Cho, H.; Chow, P. P.; Han, J.; Hichman, R. A. et al.
Object Type:
Article
System:
The UNT Digital Library
Effect of Temperature on GaGdO/GaN Metal Oxide Semiconductor Field Effect Transistors
GaGdO was deposited on GaN for use as a gate dielectric in order to fabricate a depletion metal oxide semiconductor field effect transistor (MOSFET). This is the fmt demonstration of such a device in the III-Nitride system. Analysis of the effect of temperature on the device shows that gate leakage is significantly reduced at elevated temperature relative to a conventional metal semiconductor field effeet transistor (MESFET) fabricated on the same GaN layer. MOSFET device operation in fact improved upon heating to 400 C. Modeling of the effeet of temperature on contact resistance suggests that the improvement is due to a reduction in the parasitic resistances present in the device.
Date:
October 14, 1998
Creator:
Abernathy, C. R.; Baca, A.; Chu, S. N. G.; Hong, M.; Lothian, J. R.; Marcus, M. A. et al.
Object Type:
Article
System:
The UNT Digital Library
Damage to III-V Devices During Electron Cyclotron Resonance Chemical Vapor Deposition
GaAs-based metal semiconductor field effect transistors (MESFETS), heterojunction bipolar transistors (HBTs) and high electron mobility transistors (HEMTs) have been exposed to ECR SiJ&/NH3 discharges for deposition of SiNX passivating layers. The effect of source power, rf chuck power, pressure and plasma composition have been investigated. Effects due to both ion damage and hydrogenation of dopants are observed. For both HEMTs and MESFETS there are no conditions where substantial increases in channel sheet resistivity are not observed, due primarily to (Si-H)O complex formation. In HBTs the carbon-doped base layer is the most susceptible layer to hydrogenation. Ion damage in all three devices is minimized at low rf chuck power, moderate ECR source power and high deposition rates.
Date:
October 14, 1998
Creator:
Abernathy, C.R.; Hahn, Y.B.; Hays, D.C.; Johnson, D.; Lee, J.W.; MacKenzie, K. et al.
Object Type:
Article
System:
The UNT Digital Library
[Abilene City Council Minutes: 1999]
Ledger containing minutes of the City Council in Abilene, Texas documenting the group's discussions and activities from January 14, 1999 to December 16, 1999.
Date:
1999-01-14/1999-12-16
Creator:
Abilene (Tex.)
Object Type:
Book
System:
The Portal to Texas History
Corrosion testing of stainless steel-zirconium metal waste form.
Stainless steel-zirconium (SS-Zr) alloys are being considered as waste forms for the disposition of metallic waste generated during the electrometallurgical treatment of spent nuclear fuel. The waste forms contain irradiated cladding hulls, components of the alloy fuel, noble metal fission products, and actinide elements. The baseline waste form is a stainless steel-15 wt% zirconium (SS-15Zr) alloy. This article presents microstructure and some of the corrosion studies being conducted on the waste form alloys. Electrochemical corrosion, immersion corrosion, and vapor hydration tests have been performed on various alloy compositions to evaluate corrosion behavior and resistance to selective leaching of simulated fission products. The SS-Zr waste forms are successful at the immobilization and retention of fission products and show potential for acceptance as high-level nuclear waste forms.
Date:
December 14, 1998
Creator:
Abraham, D. P.
Object Type:
Article
System:
The UNT Digital Library
Electrochemical corrosion testing of metal waste forms
Electrochemical corrosion tests have been conducted on simulated stainless steel-zirconium (SS-Zr) metal waste form (MWF) samples. The uniform aqueous corrosion behavior of the samples in various test solutions was measured by the polarization resistance technique. The data show that the MWF corrosion rates are very low in groundwaters representative of the proposed Yucca Mountain repository. Galvanic corrosion measurements were also conducted on MWF samples that were coupled to an alloy that has been proposed for the inner lining of the high-level nuclear waste container. The experiments show that the steady-state galvanic corrosion currents are small. Galvanic corrosion will, hence, not be an important mechanism of radionuclide release from the MWF alloys.
Date:
December 14, 1999
Creator:
Abraham, D. P.; Peterson, J. J.; Katyal, H. K.; Keiser, D. D. & Hilton, B. A.
Object Type:
Article
System:
The UNT Digital Library
Model Etch Profiles for Ion Energy Distribution Functions in an Inductively Coupled Plasma Reactor
Rectangular trench profiles are modeled with analytic etch rates determined from measured ion distribution functions. The pattern transfer step for this plasma etch is for trilayer lithography. Argon and chlorine angular ion energy distribution functions measured by a spherical collector ring analyzer are fit to a sum of drifting Maxwellian velocity distribution functions with anisotropic temperatures. The fit of the model ion distribution functions by a simulated annealing optimization procedure converges adequately for only two drifting Maxwellians. The etch rates are proportional to analytic expressions for the ion energy flux. Numerical computation of the etch profiles by integration of the characteristic equations for profile points and connection of the profiles points is efficient.
Date:
December 14, 1998
Creator:
Abraham-Shrauner, B.; Chen, W. & Woodworth, J.R.
Object Type:
Article
System:
The UNT Digital Library
Quantitative non-destructive evaluation of high-temperature superconducting materials
Even though the currently intensive research efforts on high- temperature superconducting materials have not yet converged on a well specified practical material, the indications are that such a material may be quite brittle, anisotropic, and may contain many flaws such as microcracks and voids at grain boundaries. Consequently, practical applications of high temperature superconducting materials will require a very careful strength analysis based on fracture mechanics considerations. Because of the high sensitivity of the strength of such materials to the presence of defects, methods of quantitative non-destructive evaluation may be expected to play an important role in strength determinations. This proposal is concerned with the use of ultrasonic methods to detect and characterize isolated cracks, clusters of microcracks and microcracks distributed throughout the material. Particular attention has been, and will continue to be devoted to relating ultrasonic results to fracture mechanics considerations.
Date:
June 14, 1991
Creator:
Achenbach, J. D.
Object Type:
Report
System:
The UNT Digital Library