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The Message, Volume 36, Number 3, November 2000
Newsletter of Congregation Beth Yeshurun in Houston, including news and events, upcoming services, member announcements, editorials, and other information of interest to congregants.
Date:
November 3, 2000
Creator:
Congregation Beth Yeshurun (Houston, Tex.)
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Molecular dynamics simulation of lattice structure, radiation damage, and vibrational spectra of zircon (ZrSiO{sub 4}).
The lattice structure, phonon density of states, and infrared spectrum for crystalline zircon, ZrSiO{sub 4}, have been studied using a molecular dynamics (MD) simulation method that utilizes the Born-Mayer-Huggins and Coulomb pair potentials and the Stillinger-Weber three-body potential. A lattice block of ZrSiO{sub 4}, which contains 343 unit cells with dimensions of 4.6249 x 4.6249 x 4.1874 nm{sub 3} and containing 8232 ions, was considered in our calculations. The simulated lattice structure agreed with that determined from x-ray and neutron diffraction experiments. The vibrational modes and absorption spectrum were calculated based on the simulated lattice and compared with infrared absorption spectra. Characteristic lines in infrared spectra obtained from previous experiments on natural and synthetic zircon were assigned to specific bond structures by interactive MD simulations with variation of selected potential parameters. It is shown that the O-Si-O three-body correlations in the SiO{sub 4} tetrahedron significantly influence the spectrum. It is demonstrated that the oxygen ions that are parallel and perpendicular to the c-axis in the SiO{sub 4} tetrahedron are inequivalent and make different contributions to the vibration spectrum. The energy distribution among 24 atoms in a unit cell in the 1011-cm{sup {minus}1} vibrational mode is shown in Fig. 1. Comparison …
Date:
November 3, 2000
Creator:
Liu, G. K.; Zhuang, H.-Z. & Beitz, J. V.
Object Type:
Article
System:
The UNT Digital Library
Molecular dynamics simulation of local structure and vibrational spectrum of uranyl (UO{sub 2}){sup 2+} in vitreous B{sub 2}O{sub 3}.
Laser spectroscopic and extended X-ray absorption fine structure (EXAFS) spectra have shown that uranium in B{sub 2}O{sub 3} glass matrix forms uranyl in the electronic configuration of (UO{sub 2}){sup 2+},but its surrounding structure is not well known. Understanding of uranyl local structure, ion-ligand interaction, and chemical stability on the nanometer scale in glasses is essential in management of long-term performance of high-level nuclear wastes after disposal in a geologic repository. In the present work, the structure, phonon density of states, and vibrational spectrum of vitreous B{sub 2}O{sub 3} and the surrounding environment that contains a uranyl ion have been studied using a molecular dynamics (MD) simulation method that utilizes the Born-Mayer-Huggins and Coulomb pair potentials and the Stillinger-Weber three-body potential. A system of 406 ions was considered in our calculation. Simulation of a thermal quenching from 3000 K to 300 K was performed to generate a uniform and equilibrium model glass matrix before structure configuration and vibrational frequencies were obtained from the system. The structure of the simulated glass is in agreement with that reported by Krogh-Moe and Mozzi et al. The characteristic network of planar boroxol (B{sub 3}O{sub 6}) rings is evident in the simulated system. A configuration of …
Date:
November 3, 2000
Creator:
Zhuang, Z.-H.; Liu, G. K. & Beitz, J. V.
Object Type:
Article
System:
The UNT Digital Library
[News Clip: Cole arrival]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
November 3, 2000, 4:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
The Oklahoma Daily (Norman, Okla.), Vol. 84, No. 55, Ed. 1 Friday, November 3, 2000
Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.
Date:
November 3, 2000
Creator:
McFall, Amy
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Optimist (Abilene, Tex.), Vol. 89, No. 20, Ed. 1, Friday, November 3, 2000
Tri-weekly student newspaper from Abilene Christian University in Abilene, Texas that includes local, state and campus news along with advertising.
Date:
November 3, 2000
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
[Parade Banner for Day of the Dead]
Photograph of a parade presented by the Mexic-Arte Museum in Austin, Texas on the Day of the Dead. Individuals in costume hold up a large banner that reads: "Mexic-Arte Museum Presents Día de los Muertos Parade." The most visible individual, right, wears a colorful striped poncho and devil mask.
Date:
November 3, 2000
Creator:
Mexic-Arte Museum (Austin, Tex.)
Object Type:
Photograph
System:
The Portal to Texas History
[Patrons in Costume]
Photograph of seven individuals at the Mexic-Arte Museum's Day of the Dead celebration on November 3rd, 2000. All wear black and white skeleton face paint. Four individuals wear hats; several wear fringed shawls. A man at the back of the group wears a beige suit with white embroidery.
Date:
November 3, 2000
Creator:
Mexic-Arte Museum (Austin, Tex.)
Object Type:
Photograph
System:
The Portal to Texas History
[People Wearing Costumes at Day of the Dead Celebration]
Photograph of a family dressed in costume at the Day of the Dead celebration held by the Mexic-Arte Museum in Austin, Texas. A man, left, wears a black robe and fake bullet belts crossed at his chest. He also wears black and white face paint and a straw sombrero. He holds a fake handgun in his right hand. A woman to the right wears a blue skirt with lace tiers, a white blouse with colorful floral embroidery, and red ribbons in her hair. She holds a small child with her right arm. Her left arm brushes against the man's left shoulder. The child has a mustache painted above his upper lip.
Date:
November 3, 2000
Creator:
Mexic-Arte Museum (Austin, Tex.)
Object Type:
Photograph
System:
The Portal to Texas History
[Performance Before Parade]
Photograph of a performance before the Day of the Dead parade presented by the Mexic-Arte Museum in Austin, Texas on November 3rd, 2000. An audience watches a group of people dressed as skeletons as they dance.
Date:
November 3, 2000
Creator:
Mexic-Arte Museum (Austin, Tex.)
Object Type:
Photograph
System:
The Portal to Texas History
The Persian Gulf: Issues for U.S. Policy, 2000
None
Date:
November 3, 2000
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Plasma Vertical Control with Internal and External Coils in Nest Step Tokamaks
Vertical stability and control are examined for a tokamak configuration intended to be a generic representation of next step devices. Vertical stability calculations show that a critical resistive wall location can be determined for realistic structures, and that the introduction of small amounts of low resistivity material to an all steel structure can significantly reduce the vertical instability growth rate. Vertical control simulations show that internal control coils require significantly less feedback power than external coils, and that low resistivity materials can allow very low feedback powers or coils to be located externally with reasonable feedback powers.
Date:
November 3, 2000
Creator:
Kessel, C.E.; Heitzenroeder, P. & Jun, C.
Object Type:
Report
System:
The UNT Digital Library
Production and Machining of Thin Wall Gray and Ductile Cast Iron
The University of Alabama at Birmingham, in cooperation with the American Foundry Society, companies across North America, with support from the U.S. Department of Energy, is conducting a project to develop an understanding of the factors that control the machinability of cast gray and ductile iron. Differences of as much as 500% have been found in machinability have been observed at the same strength. The most machinable irons were those with a high cell counts and few carbonitride inclusions. Additions of tin and copper can be added to both gray and ductile iron to stabilize the pearlite, but excessive additions (above those required to produce the desired pearlite content) degrade the machinability.
Date:
November 3, 2000
Creator:
Fleischman, E. H.; Li, H.; Griffin, R.; Bates, C. E. & Eleftheriou, E.
Object Type:
Report
System:
The UNT Digital Library
Qtexas, Volume 1, Issue 7, November 3, 2000
Weekly magazine containing news, information about events, interviews, and articles of interest to the gay and lesbian community in Texas, with advertising.
Date:
November 3, 2000
Creator:
Qtexas Publishing, LLC
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
The Ranger (San Antonio, Tex.), Vol. 76, No. 8, Ed. 1 Friday, November 3, 2000
Weekly student newspaper from San Antonio College in San Antonio, Texas that includes campus news along with advertising.
Date:
November 3, 2000
Creator:
San Antonio College
Object Type:
Newspaper
System:
The Portal to Texas History
The Rattler (San Antonio, Tex.), Vol. 87, No. 3, Ed. 1 Friday, November 3, 2000
Biweekly student newspaper from St. Mary's University in San Antonio, Texas that includes campus news along with advertising.
Date:
November 3, 2000
Creator:
St. Mary's University (San Antonio, Tex.)
Object Type:
Newspaper
System:
The Portal to Texas History
Real-Time Tracking of Articulated Human Models Using a 3D Shape-From-Silhouette Method
None
Date:
November 3, 2000
Creator:
LUCK,JASON P. & SMALL,DANIEL E.
Object Type:
Article
System:
The UNT Digital Library
Review of Certain Aspects of the District of Columbia's Fiscal Year 1999 Comprehensive Annual Financial Report (CAFR)
Correspondence issued by the General Accounting Office with an abstract that begins "Mitchell & Titus, LLP issued its Independent Auditors' Reports on the general purpose financial statements included in the District of Columbia's Comprehensive Annual Financial Report (CAFR) the fiscal year 1999. GAO reviewed the auditors' report in order to answer several congressional questions about to the CAFR. The independent auditors used generally accepted auditing procedures to ensure that the expenditures, revenues, and assets were properly stated in the CAFR. However, the auditors did not, when assessing the District's property, plant, and equipment, include in their risk analysis two issues that could affect the accuracy of the data reported. Accounting errors explained why the District of Columbia Financial Responsibility and Management Assistance Authority's actual expenditures were different on the CAFR and its own audited financial statements. The auditors' report notes that the District's Chief Financial Officer did not use proper procedures in performing reversal of accruals in the Advisory Neighborhood Commission's (ANC) account. By not following the stated procedures, ANC's expenditures were understated by about $277,000."
Date:
November 3, 2000
Creator:
United States. General Accounting Office.
Object Type:
Text
System:
The UNT Digital Library
The Rice Thresher, Vol. 88, No. 11, Ed. 1 Friday, November 3, 2000
A weekly student newspaper from the Rice University in Houston, Texas that includes campus news and commentaries along with advertising.
Date:
November 3, 2000
Creator:
Stoler, Brian
Object Type:
Newspaper
System:
The Portal to Texas History
Sapulpa Daily Herald (Sapulpa, Okla.), Vol. 85, No. 353, Ed. 1 Friday, November 3, 2000
Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.
Date:
November 3, 2000
Creator:
Quinnelly, Lorrie J.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Self-breaking of the standard model Gauge Symmetry
None
Date:
November 3, 2000
Creator:
Arkani-Hamed, Nima; Cheng, Hsin-Chia; Dobrescu, Bogdan A. & Hall, Lawrence J.
Object Type:
Article
System:
The UNT Digital Library
Spent Nuclear Fuel (SNF) Project Execution Plan
The Spent Nuclear Fuel (SNF) Project supports the Hanford Site Mission to cleanup the Site by providing safe, economic, environmentally sound management of Site spent nuclear fuel in a manner that reduces hazards by staging it to interim onsite storage and deactivates the 100 K Area facilities.
Date:
November 3, 2000
Creator:
LeRoy, P. G.
Object Type:
Report
System:
The UNT Digital Library
Stellar velocimetry with a novel high efficiency interferometer
The search for extra-solar planets continues to be one of the most exciting fields in astronomy, with great interest shown by the public. The detection of planets via the Doppler effect, measuring the gravitational tugging of the planet on the parent star, is the most popular method. Jupiter and Saturn-like planets create 12 and 3 m/s signatures, respectively. Many institutions endeavor to join the search. They are hampered by the lack of affordable instruments having sufficient velocity resolution. Conventional high spectral resolution grating spectrometers are extremely expensive and massive due to their large size (5 meters). Due to their extreme sensitivity to input beam path, the most accurate velocimeters must use the iodine vapor cell as a spectral reference, (which does not deviate the beam due to its absorptive nature.) However, this operates only with green light. Hence, most of the photons from a star are wasted, particularly from red stars. In spite of constituting more than 60% of stars near Earth, red stars are currently under-represented on planet search surveys due to their relative weakness in the green. We have developed a new method for measuring Doppler shifts of starlight having many practical benefits. It is based on the …
Date:
November 3, 2000
Creator:
Erskine, D J & Ge, J
Object Type:
Report
System:
The UNT Digital Library
Sub-picosecond laser deposition of thin films
The 1999 Nobel Prize in Chemistry recognized the importance and growing maturity of the femtosecond time-scale in science and engineering. Understanding the interaction between materials and high energy density light to manufacture and process materials has become a key issue in both programmatic and fundamental research at Lawrence Livermore National Laboratory. We have emphasized in this research the aspects related to producing thin films by ablation of material with intense ultra-short laser pulses. Our effort during FY2000 has been focused on building the foundation of this research using high purity graphite as the initial ablation material. We have deposited diamond-like carbon (DLC) in vacuum, measured ablation rates, and characterized the physical and chemical properties of the films. We successfully completed our first objective to compare the microstructure and materials properties of the films deposited using lasers operated in the femtosecond and nanosecond pulse length regime. The mechanical characterization of the deposits showed improved film-substrate adhesion properties that allowed us to build 200-{micro}m thick layers using 150 fs pulses. Films produced with ns-pulses delaminated as soon as the thickness reached only a couple of microns. The stresses in the films were greatly influenced by the fluence and the duration of the …
Date:
November 3, 2000
Creator:
Genin, F; Stuart, B; McLean, W & Chase, L
Object Type:
Report
System:
The UNT Digital Library