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open access

[Letter from Cassandra Broadus to Esther Livingston, January 7, 1991]

Description: Photocopy of a letter from Cassandra Broadus, to Esther Livingston, teacher at T.D. Marshall Elementary School. Broadus has gifted Livingston overhead transparencies to be used in Livingston's transportation unit curriculum. The transparencies include, Winslow Homer's Breezing Up (A Fair Wind) and other similar subjects for the elementary school children. Broadus ends the letter by suggesting a class visitation to correlate a lesson plan for the children in arts and language.
Date: January 7, 1991
Creator: Broadus, Cassandra
Item Type: Refine your search to only Letter
Partner: UNT Libraries Special Collections
open access

Relativistic shock waves and the excitation of plerions

Description: The shock termination of a relativistic magnetohydrodynamic wind from a pulsar is the most interesting and viable model for the excitation of the synchrotron sources observed in plerionic supernova remnants. We have studied the structure of relativistic magnetosonic shock waves in plasmas composed purely of electrons and positrons, as well as those whose composition includes heavy ions as a minority constituent by number. We find that relativistic shocks in symmetric pair plasmas create fully t… more
Date: January 7, 1991
Creator: Arons, J. (California Univ., Berkeley, CA (USA)); Gallant, Y.A. (California Univ., Berkeley, CA (USA). Dept. of Physics); Hoshino, Masahiro; Max, C.E. (California Univ., Livermore, CA (USA). Inst. of Geophysics and Planetary Physics) & Langdon, A.B. (Lawrence Livermore National Lab., CA (USA))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Hydrogen-like recombination x-ray laser experiments using a 20 picosecond laser pulse at the Nova facility

Description: Hydrogen-like recombination X-ray lasers are currently under investigation as an alternative candidate to collisional pumped soft X-ray amplifiers. Efforts are being concentrated on the n = 3 to n = 2 transitions in H-like Mg and NaF. 5 refs., 1 fig.
Date: January 7, 1991
Creator: Shephard, R.; Fields, D.; DaSilva, L.; Keane, C.; MacGowen, B.; Matthews, D. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Short wavelength nickel-like x-ray laser development

Description: Ni-like x-ray lasers have been produced at wavelengths near to, and below the carbon K edge (43.76-{Angstrom}). Recent work has concentrated on the development of the Ni-like Ta amplifier at 44.83-{Angstrom}. Amplification occurs in a laser produced plasma created by irradiating a thin foil of Ta with two beams of the Nova laser. Up to 8 gainlengths have been demonstrated so far, with a gain coefficient of 3.2 cm{sup {minus}1} and a gain duration of 250 psec. The wavelength of 44.83-{Angstrom} … more
Date: January 7, 1991
Creator: MacGowan, B. J.; Da Silva, L. B.; Fields, D. J.; Fry, A. R.; Keane, C. J.; Koch, J. A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Even- and odd-parity finite-element transport solutions in the thick diffusion limit

Description: We analyze the behavior of odd-parity continuous finite-element methods (CFEMs) for problems that contain diffusive regions. We find that each of these method produces a solution that, to leading order inside diffusive regions, satisfies a discretization of the diffusion equation. We find further that these leading-order solutions satisfy boundary conditions that can lead to large errors in the interior solution. We recognize, however, that we can combine an odd-purity CFEM solution and an even… more
Date: January 7, 1991
Creator: Adams, M.L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Extending the alias Monte Carlo sampling method to general distributions

Description: The alias method is a Monte Carlo sampling technique that offers significant advantages over more traditional methods. It equals the accuracy of table lookup and the speed of equal probable bins. The original formulation of this method sampled from discrete distributions and was easily extended to histogram distributions. We have extended the method further to applications more germane to Monte Carlo particle transport codes: continuous distributions. This paper presents the alias method as ori… more
Date: January 7, 1991
Creator: Edwards, A. L.; Rathkopf, J. A. & Smidt, R. K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Magnetospheric structure of rotation powered pulsars

Description: I survey recent theoretical work on the structure of the magnetospheres of rotation powered pulsars, within the observational constraints set by their observed spindown, their ability to power synchrotron nebulae and their ability to produce beamed collective radio emission, while putting only a small fraction of their energy into incoherent X- and gamma radiation. I find no single theory has yet given a consistent description of the magnetosphere, but I conclude that models based on a dense ou… more
Date: January 7, 1991
Creator: Arons, J. (California Univ., Berkeley, CA (USA) California Univ., Livermore, CA (USA). Inst. of Geophysics and Planetary Physics)
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Discontinuous finite-element transport solutions in the thick diffusion limit in Cartesian geometry

Description: We analyze the behavior of discontinuous finite-element methods (DFEMs) for problems that contain diffusive regions. We find that in slab geometry most of these methods perform quite well, but that the same is not true in XY or XYZ geometry. In these geometries, we find that there are two distinct sets of DFEMS. Methods in one set produce unphysical solutions in diffusive regions; the other leading-order solutions that satisfy discretizations of the correct diffusion equation. We show that two … more
Date: January 7, 1991
Creator: Adams, M.L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Colorado State University program for developing, testing, evaluating and optimizing solar heating and cooling systems

Description: This report discusses the following tasks; solar heating with isothermal collector operation and advanced control strategy; solar cooling with solid desiccant; liquid desiccant cooling system development; solar house III -- development and improvement of solar heating systems employing boiling liquid collectors; generic solar domestic water heating systems; advanced residential solar domestic hot water (DHW) systems; management and coordination of Colorado State/DOE program; and field monitorin… more
Date: January 7, 1991
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Experimental study of filamentation in laser-plasma interactions

Description: The filamentation instability can lead to regions of increased laser intensity when a spatially nonuniform laser beam interacts with a plasma. An experimental technique will be described which identifies the density perturbation produced by filaments. The growth of filaments has been investigated and, when the laser intensity is large enough, the transverse density profile of the filament can be measured. Evidence of filament growth influenced by plasma flow and density gradients is presented. … more
Date: January 7, 1991
Creator: Young, P.E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
captions transcript

[News Clip: D. C. Storm]

Description: B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: January 7, 1991, 10:00 p.m.
Duration: 32 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
open access

(Limiting the greenhouse effect)

Description: Traveler attended the Dahlem Research Conference organized by the Freien Universitat, Berlin. The subject of the conference was Limiting the Greenhouse Effect: Options for Controlling Atmospheric CO{sub 2} Accumulation. Like all Dahlem workshops, this was a meeting of scientific experts, although the disciplines represented were broader than usual, ranging across anthropology, economics, international relations, forestry, engineering, and atmospheric chemistry. Participation by scientists from … more
Date: January 7, 1991
Creator: Rayner, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
captions transcript

[News Clip: Geren reax]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story. This story aired at 10 P.M.
Date: January 7, 1991
Duration: 53 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
open access

The constructive use of heat in an unsaturated tuff repository

Description: By designing the engineered barrier system in an unsaturated tuff repository to constructively use heat, the waste containers can be kept dry for hundreds of years. Without water, the aqueous processes that release and transport radionuclides do not operate. In the plans of most international programs, waste is cooled prior to disposal in granite or salt. For these rocks there are technical issues favoring reduced heat. Recently, it has been suggested that the US Program adopt a strategy of coo… more
Date: January 7, 1991
Creator: Ramspott, L.D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
captions transcript

[News Clip: Camoflag]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: January 7, 1991, 6:00 p.m.
Duration: 1 minute 33 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
captions transcript

[News Clip: Economic Impact]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: January 7, 1991, 10:00 p.m.
Duration: 1 minute 50 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
captions transcript

[News Clip: Pruitt]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: January 7, 1991, 6:00 p.m.
Duration: 1 minute 41 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
captions transcript

[News Clip: Taxi Fares]

Description: B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: January 7, 1991, 5:00 p.m.
Duration: 43 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
captions transcript

[News Clip: Teen Justice]

Description: B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: January 7, 1991, 10:00 p.m.
Duration: 45 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
captions transcript

[News Clip: Teen Justice]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: January 7, 1991, 5:00 p.m.
Duration: 1 minute 46 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
captions transcript

[News Clip: Otwell/ Sodomy

Description: B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: January 7, 1991, 10:00 p.m.
Duration: 45 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
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