15 Matching Results

Search Results

Results: 1 - 15
open access

A new transport discretization scheme for arbitrary spatial meshes in XY geometry

Description: We introduce a new spatial discretization scheme for transport on arbitrary spatial grids in XY geometry. Our arbitrary'' spatial grid is composed of arbitrarily-connected polygons, each of which may have an arbitrary number of sides. We begin our derivation by imposing particle balance on every corner'' of each cell (Consequently, we call our scheme the corner-balance (CB) method.) We complete the derivation by introducing simple closure formulas that relate volume-averaged unknowns to surface… more
Date: January 18, 1991
Creator: Adams, M.L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Optically-ionized plasma recombination x-ray lasers

Description: Design studies for recombination x-ray lasers based on plasmas ionized by high intensity, short pulse optical lasers are presented. Transient lasing on n = 3 to n = 2 transitions in Lithium-like Neon allows for moderately short wavelengths ({le} 100{angstrom}) without requiring ionizing intensities associated with relativistic electron quiver energies. The electron energy distribution following the ionizing pulse affects directly the predicted gains for this resonance transition. Efficiencies o… more
Date: January 18, 1991
Creator: Amendt, P.; Eder, D.C.; Wilks, S.C.; Dunning, M.J. & Keane, C.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The enriched chromium neutrino source for GALLEX

Description: The preparation and study of an intense source of neutrinos in the form of neutron irradiated materials which are enriched in Cr-50 for use in the GALLEX solar neutrino experiment are discussed. Chromyl fluoride gas is enriched in the Cr-50 isotope by gas centrifugation and subsequently converted to a very stable form of chromium oxide. The results of neutron activation analyses of such chromium samples indicate low levels of any long-lived activities, but show that short-lived activities, in p… more
Date: January 18, 1991
Creator: Hartmann, F. X. & Hahn, R. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The single electron chemistry of coals. [Quarterly] report, July 1, 1990--December 30, 1990

Description: Our work on single election transfer in coals led us to the knowledge that the energetics of bond cleavage in radical cations is 20-40 kcal/mole lower than the corresponding homolytic bond cleavage energies. Having made excellent progress in the other areas covered by this proposal, we are extending our studies to the investigation of the formation and cleavage reaction of radical cations in coals. The formation of a radical cation requires the transfer of an electron from a neutral molecule to… more
Date: January 18, 1991
Creator: Larsen, John W. & Kaushal, P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

[Memo from Jack Davis to the Regional Institute Directors, January 19, 1991]

Description: A memo from Jack Davis, co-director of North Texas Institute for Educators on the Visual Arts, to the regional institute directors, Shelia Brown, Margaret DiBlasio, Edith Johnson, Phyllis Johnson, Anne Lindsey, Jessie Lovano-Kerr, Nancy MacGregor, Bill McCarter, Tom McMullen, Nancy Roucher and Joyce Wright. The memo is in regards to Davis moderating the Director's forum discussion and hopes the directors will identify issues that need to be discussed. Attached to the memo is the Agenda for the … more
Date: January 18, 1991
Creator: Davis, Donald Jack
Item Type: Refine your search to only Letter
Partner: UNT Libraries Special Collections
open access

The single electron chemistry of coals

Description: Our work on single election transfer in coals led us to the knowledge that the energetics of bond cleavage in radical cations is 20-40 kcal/mole lower than the corresponding homolytic bond cleavage energies. Having made excellent progress in the other areas covered by this proposal, we are extending our studies to the investigation of the formation and cleavage reaction of radical cations in coals. The formation of a radical cation requires the transfer of an electron from a neutral molecule to… more
Date: January 18, 1991
Creator: Larsen, J. W. & Kaushal, P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
captions transcript

[News Clip: Slice of Life]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: January 18, 1991, 6:30 p.m.
Duration: 1 minute 37 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: Paranoia]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: January 18, 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: Mosque]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: January 18, 1991, 6:00 p.m.
Duration: 1 minute 48 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: Weapons]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: January 18, 1991, 6:00 p.m.
Duration: 1 minute 38 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: Oil Prices]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: January 18, 1991, 10:00 p.m.
Duration: 2 minutes 02 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
Back to Top of Screen