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1998 Complex Systems Summer School
For the past eleven years a group of institutes, centers, and universities throughout the country have sponsored a summer school in Santa Fe, New Mexico as part of an interdisciplinary effort to promote the understanding of complex systems. The goal of these summer schools is to provide graduate students, postdoctoral fellows and active research scientists with an introduction to the study of complex behavior in mathematical, physical, and living systems. The Center for Nonlinear Studies supported the eleventh in this series of highly successful schools in Santa Fe in June, 1998.
Date:
December 15, 1998
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Altus Times (Altus, Okla.), Vol. 99, No. 236, Ed. 1 Tuesday, December 15, 1998
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 15, 1998
Creator:
Cole, Carol
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Baytown Sun (Baytown, Tex.), Vol. 77, No. 39, Ed. 1 Tuesday, December 15, 1998
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
December 15, 1998
Creator:
Dobbs, Gary
Object Type:
Newspaper
System:
The Portal to Texas History
The Boerne Star (Boerne, Tex.), Vol. 94, No. 100, Ed. 1 Tuesday, December 15, 1998
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
December 15, 1998
Creator:
Chionsini, Brandi
Object Type:
Newspaper
System:
The Portal to Texas History
Congregation Beth Israel Bulletin, Volume 145, Number 9, December 1998
Newsletter of Congregation Beth Israel in Houston, including news and events, upcoming services, member announcements, editorials, and other information of interest to congregants.
Date:
December 15, 1998
Creator:
Congregation Beth Israel (Houston, Tex.)
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Creating metallic under-dense radiators by electron beam heating prior to laser impact
A pulsed, relativistic electron beam can heat a metal foil to a plasma state, and initiate an expanding flow into vacuum. At a given time in its evolution, this flow fills a nearly spherical volume with nearly uniform density, assuming a rapid expansion prior to any condensation. A metal cloud produced in this way can serve as a target of intense laser illumination to create an under-dense radiator of x-rays. The phrase ''under-dense radiator'' means that the cloud, assumed ionized, has a plasma density that is less than the critical density for the wavelength of the laser light. The example described here is of a 2 {micro}g copper foil 23 {micro}m thick and 0.16 mm in diameter, heated by 8 mJ of electron beam energy in as short a time as possible, perhaps under 50 ns. The electron beam pulse must be at least 140 nC at 100 keV in order to transit the foil and deposit 8 mJ. A 50 ns pulse focused on the target would have a current of 2.8 A, and a current density of 14 kA/cm{sup 2}. The initial plasma temperature is 0.5 eV. After 300 ns, the flow has expanded to fill a nearly …
Date:
December 15, 1998
Creator:
Garcia, M
Object Type:
Report
System:
The UNT Digital Library
Current Status of Health and Safety Issues of Sodium/Metal Chloride (Zebra) Batteries
This report addresses environmental, health, and safety (EH&S) issues associated with sodium/ metal chloride batteries, in general, although most references to specific cell or battery types refer to units developed or being developed under the Zebra trademark. The report focuses on issues pertinent to sodium/metal chloride batteries and their constituent components; however, the fact that some ''issues'' arise from interaction between electric vehicle (EV) and battery design compels occasional discussion amid the context of EV vehicle design and operation. This approach has been chosen to provide a reasonably comprehensive account of the topic from a cell technology perspective and an applications perspective.
Date:
December 15, 1998
Creator:
Trickett, D.
Object Type:
Report
System:
The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Tuesday, December 15, 1998
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 15, 1998
Creator:
Bush, Kent
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Gayly Oklahoman (Oklahoma City, Okla.), Vol. 16, No. 24, Ed. 1 Tuesday, December 15, 1998
Semi-monthly newspaper from Oklahoma City, Oklahoma that includes local, state, and national news and advertising of interest to the Lesbian, Gay, Bisexual, and Transgender (LGBT) community.
Date:
December 15, 1998
Creator:
Hawkins, Don
Object Type:
Newspaper
System:
The UNT Digital Library
The Harper Herald (Harper, Tex.), Vol. 69, No. 99, Ed. 1 Tuesday, December 15, 1998
Weekly newspaper from Harper, Texas that includes local, state, and national news along with advertising.
Date:
December 15, 1998
Creator:
Bishop, Karen
Object Type:
Newspaper
System:
The Portal to Texas History
High-Performance, 0.6-eV, GA0.32In0.68As/In0.32P0.68 Thermophotovoltaic Converters and Monolithically Interconnected Modules
Recent progress in the development of high-performance, 0.6-eV Ga0.32In0.68As/InAs0.32P0.68 thermophotovoltaic (TPV) converters and monolithically interconnected modules (MIMs) is described. The converter structure design is based on using a lattice-matched InAs0.32P0.68/Ga0.32In0.68As/InAs0.32P0.68 double-heterostructure (DH) device, which is grown lattice-mismatched on an InP substrate, with an intervening compositionally step-graded region of InAsyP1-y. The Ga0.32In0.68As alloy has a room-temperature band gap of {approx}0.6 eV and contains a p/n junction. The InAs0.32P0.68 layers have a room-temperature band gap of {approx}0.96 eV and serve as passivation/confinement layers for the Ga0.32In0.68As p/n junction. InAsyP1-y step grades have yielded DH converters with superior electronic quality and performance characteristics. Details of the microstructure of the converters are presented. Converters prepared for this work were grown by atmospheric-pressure metalorganic vapor-phase epitaxy (APMO VPE) and were processed using a combination of photolithography, wet-chemical etching, and conventional metal and insulator deposition techniques. Excellent performance characteristics have been demonstrated for the 0.6-eV TPV converters. Additionally, the implementation of MIM technology in these converters has been highly successful.
Date:
December 15, 1998
Creator:
Wanlass, M. W.; Carapella, J. J.; Duda, A.; Emery, K.; Gedvilas, L.; Moriarty, T. et al.
Object Type:
Article
System:
The UNT Digital Library
Market-Driven EFG Modules, Annual Subcontract Report, 14 December 1996 - 13 February 1998
This report summarizes the progress made at ASE Americas Inc. during Phase II of this subcontract. Accomplishments under Task 4: Wafers include optimization of edge-defined film-fed growth (EFG) crystal growth variables, leading to reduced crystal stresses and improved wafer flatness; increased die run length due to improvements in the design of furnace components; construction and testing of EFG growth furnace enclosure; reduction of EFG wafer thickness from 300 {micro}m for 50% of all standard production material; implementation of new equipment to reduce costs of silicon feedstock sorting prior to EFG crystal growth with a 3% increase in silicon feedstock utilization; and development work demonstrating the laser cutting of EFG wafers at higher speeds and with reduced silicon damage. Accomplishments under Task 5: Cells include characterization of cells after diffusion as preliminary work toward improving diffusion conditions and improving cell efficiency; demonstration of a continuous process to remove phosphorus glass from diffused wafers, reducing chemical consumption and hazardous waste by 98%; development of statistical process control methods to improve cell production process control; the use of design of experiments to study interactions between processing at various steps in cell manufacturing, and to develop strategies for productivity improvements; improvements in EFG cell …
Date:
December 15, 1998
Creator:
Kardauskas, M. & Kalejs, J. (ASE Americas, Inc., Billerica, Massachusetts)
Object Type:
Report
System:
The UNT Digital Library
Multimedia Feedback Systems for Engineering
The World Wide Web has become a key tool for information sharing. Engineers and scientists are finding that the web is especially suited to publishing the graphical, multi-layered information that is typical of their work. Web pages are easier to distribute than hardcopy. Web movies have become more accessible, in many offices, than videos. Good VRML viewing software, bundled with most new PCs, has sufficient power to support many engineering needs. In addition to publishing information science and engineering has an important tradition of peer and customer review. Reports, drawings and graphs are typically printed, distributed, reviewed, marked up, and returned to the author. Adding review comments to paper is easy. When, however, the information is in electronic form, this ease of review goes away. It's hard to write on videos. It's even harder to write comments on animated 3D models. These feedback limitations reduce the value of the information overall. Fortunately, the web can also be a useful tool for collecting peer and customer review information. When properly formed, web reports, movies, and 3D animations can be readily linked to review notes. This paper describes three multimedia feed-back systems that Sandia National Laboratories has developed to tap that potential. …
Date:
December 15, 1998
Creator:
Gladwell, S.; Gottlieb, E.J.; McDonald, M.J. & Slutter, C.L.
Object Type:
Article
System:
The UNT Digital Library
National Stonewall Democratic Federation
Letter from board officers to "member" on December 15, 1998 thanking them for their support. Included is a letter to Mr. President from Daniel McGlinchey regarding Stonewall's efforts to elect Democrats who support equal rights for gay and lesbian Americans. Also, two line graphs showing the percentage of Democrat Pro-Gay Vote compare to Republican Pro-Gay Vote in the US. House of Representatives and the U.S. Senate.
Date:
December 15, 1998
Creator:
unknown
Object Type:
Letter
System:
The UNT Digital Library
Observation of photoexcited emission clusters in the bulk of KDP and laser conditioning under 355-nm irradiation
Defect clusters in the bulk of large KDP crystals are revealed using a microscopic fluorescence imaging system and CW laser illumination. Exposure of the crystal to high power 355-nm, 3-ns laser irradiation leads to a significant reduction of the number of observed optically active centers. The initially observed defect cluster concentration is approximately 10<sup>4</sup>-10<sup>6</sup> per mm<sup>3</sup> depending on the crystal growth method and sector of the crystal. The number of defect clusters can be reduced by a factor of 10<sup>2</sup> or more under exposure to 355-nm laser irradiation while their average intensities also decreases. Spectroscopic measurements provide information on the electronic structure of the defects.
Date:
December 15, 1998
Creator:
De Yoreo, J. J.; Demos, S. G.; Radousky, H. B.; Staggs, M. & Yan, M.
Object Type:
Article
System:
The UNT Digital Library
Perry Daily Journal (Perry, Okla.), Vol. 105, No. 244, Ed. 1 Tuesday, December 15, 1998
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 15, 1998
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0116.0568]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "The John Marshall defense couldn't keep Burks from hitting 6 3-point shots."
Date:
December 15, 1998
Creator:
Hellstern, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Principal facts for new gravity stations in the Pahute Mesa and Oasis Valley areas, Nye County, Nevada
Regional gravity and aeromagnetic maps of the Pahute Mesa and Oasis Valley region indicate the presence of several structures that may influence the flow of groundwater. For example, several prominent linear features expressed by both gravity and aeromagentic data could act either as barriers or conduits for groundwater. The current gravity study was undertaken to better define the boundaries of the interpreted major regional structures in the area.
Date:
December 15, 1998
Creator:
Davidson, J. G.; Hildenbrand, T. G.; Mankinen, E. A. & Roberts, C. W.
Object Type:
Report
System:
The UNT Digital Library
Rains County Leader (Emory, Tex.), Vol. 111, No. 27, Ed. 1 Tuesday, December 15, 1998
Weekly newspaper from Emory, Texas that includes local, state, and national news along with advertising.
Date:
December 15, 1998
Creator:
Hill, Earl Clyde, Jr.
Object Type:
Newspaper
System:
The Portal to Texas History
Sapulpa Daily Herald (Sapulpa, Okla.), Vol. 84, No. 79, Ed. 1 Tuesday, December 15, 1998
Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 15, 1998
Creator:
Horn, Richard A.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
[Support of theoretical high energy physics research at the Supercomputer Computations Research Institute]. Final report, September 30, 1992--July 31, 1997
The research primarily involved lattice field theory simulations such as Quantum Chromodynamics (QCD) and the Standard Model of electroweak interactions. Among the works completed by the members of the lattice group and their outside collaborators in QCD simulations are extensive hadronic spectrum computations with both Wilson and staggered fermions, and calculations of hadronic matrix elements and wavefunctions. Studies of the QCD {beta} function with two flavors of Wilson fermions, and the study of a possible flavor-parity breaking phase in QCD with two flavors of Wilson fermions have been completed. Studies of the finite temperature behavior of QCD have also been a major activity within the group. Studies of non-relativistic QCD, both for heavy-heavy mesons and for the heavy quark in heavy-light mesons have been done. Combining large N analytic computations within the Higgs sector of the standard model and numerical simulations at N = 4 have yielded a computation of the upper bound of the mass of the Higgs particle, as well as the energy scale above which deviations from the Standard Model may be expected. A major research topic during the second half of the grant period was the study of improved lattice actions, designed to diminish finite lattice …
Date:
December 15, 1998
Creator:
Bitar, Khalil M.; Edwards, Robert G.; Heller, Urs M. & Kennedy, Anthony D.
Object Type:
Report
System:
The UNT Digital Library
U.S. Farm Income: Recent National and Regional Changes and the Federal Response
Major segments of U.S. agriculture are experiencing declining farm income and financial difficulty. The degree of decline, however, differs among regions and commodities. In 1996, the overall farm sector experienced record high income that declined 6.7% in 1997, and is forecast to decline by another 3.6% in 1998. Several factors are responsible for the recent drop in farm income. Reduced export demand and large global supplies have reduced crop prices
Date:
December 15, 1998
Creator:
Heykoop, Jerry & Jones, Jean Yavis
Object Type:
Report
System:
The UNT Digital Library
X-band photoinjector for a chirped-pulse FEL
The phase noise and jitter characteristics of the laser and rf systems of a high gradient X-band photoinjector have been measured experimentally. When > 100 coherently phased 5 MeV electron bunches are produced in bursts, the photoinjector should be an ideal electron source for a pulsed, pre-bunched free-electron laser (FEL) operating at 100 GHz. The laser oscillator is a self-modelocked Titanium:Sapphire system operating at the 108th subharmonic of the rf gun. The X-band signal is produced from the laser by a phase-locked dielectric resonance oscillator, and amplified by a pulsed TWT and klystron. A comparison between the klystron and TWT amplifier phase noise and the fields excited in the rf gun demonstrates the filtering effect of the high Q structure, thus indicating that the rf gun can be used as a master oscillator, and could be energized by either a rf oscillator such as a magnetron or a compact source such as a cross-field amplifier. In particular, the rf gun can play the role of a pulsed rf clock to synchronize the photocathode laser system: direct drive of a synchronously mode-locked AlGaAs quantum well laser has been achieved using the X0-band gun rf fields. This novel, GHz repetition rate, sub-picosecond …
Date:
December 15, 1998
Creator:
Luhmann, Jr. N. C.; Alvis, R. M.; Baldis, H. A.; Hartemann, F. V; Heritage, J. P.; Ho, C. H. et al.
Object Type:
Article
System:
The UNT Digital Library
2-D electric fields and drifts near the magnetic separatrix in divertor tokamaks
A 2-D calculation is presented for the transport of plasma in the edge region of a divertor tokamak solving continuity, momentum, and energy balance fluid equations. The model uses anomalous radial diffusion, including perpendicular ion momentum, and classical cross-field drifts transport. Parallel and perpendicular currents yield a self-consistent electrostatic potential on both sides of the magnetic separatrix. Outside the separatrix, the simulation extends to material divertor plates where the incident plasma is recycled as neutral gas and where the plate sheath and parallel currents dominate the potential structure. Inside the separatrix, various radial current terms - from viscosity, charge-exchange and poloidal damping, inertia, and {triangledown}B - contribute to the determining the potential. The model rigorously enforces cancellation of gyro-viscous and magnetization terms from the transport equations. The results emphasize the importance of E x B particle flow under the X-point which depends on the sign of the toroidal magnetic field. Radial electric field (E{sub y}) profiles at the outer midplane are small with weak shear when high L-mode diffusion coefficients are used and are large with strong shear when smaller H-mode diffusion coefficients are used. The magnitude and shear of the electric field (E{sub y}) is larger both when the …
Date:
November 15, 1998
Creator:
Mattor, N.; Porter, G. D.; Rognlien, T. D. & Ryutov, D. D.
Object Type:
Article
System:
The UNT Digital Library