Several new types of silicon-containing preceramic polymers, i.e., poly(diorganosilacetylene) and poly(diorganosilvinylene) have been synthesized with molecular weights from 10,000 to 120,000. These polymers could be thermally converted to SiC with a moderate to high char yields. Ready solubility and good processability made these types of polymers attractive in their applications to ceramics. The thermal polymerization of diethynyldiphenyl-silane, which was reported in 1968 to afford poly(diphenylsilyldiacetylene) via dehydrogenation, was reinvestigated. Spectroscopic studies showed that the polymer had a structure of polyacetylene type not diacetylene. Diphenyldiethynylgermane and a series of diorganodiethynylsilances were synthesized. These could be polymerized in the presence of MoCl{sub 5} or WCl{sub 6} to afford a soluble, violet material with Mw as high as 108,000. 100 refs., 56 figs., 16 tabs.

An exhaustive study was conducted to determine the feasibility of Nernst-type oxygen sensors based on ceramics containing Bi{sub 2}O{sub 3}. The basic sensor design consisted of a ceramic sensing module sealed into a metal tube. The module accommodated an internal heater and thermocouple. Thermal-expansion-matched metals, adhesives, and seals were researched and developed, consistent with sequential firings during sensor assembly. Significant effort was devoted to heater design/testing and to materials' compatibility with Pt electrodes. A systematic approach was taken to develop all sensor components which led to several design modifications. Prototype sensors were constructed and exhaustively tested. It is concluded that development of Nerst-type oxygen sensors based on Bi{sub 2}O{sub 3} will require much further effort and application of specialized technologies. However, during the course of this 3-year program much progress was reported in the literature on amperometric-type oxygen sensors, and a minor effort was devoted here to this type of sensor based on Bi{sub 2}O{sub 3}. These studies were made on Bi{sub 2}O{sub 3}-based ceramic samples in a multilayer-capacitor-type geometry and amperometric-type oxygen sensing was demonstrated at very low temperatures ({approximately} 160{degree}C). A central advantage here is that these types of sensors can be mass-produced very inexpensively ({approximately} 20--50 cents …

Faculty recital performed at the UNT College of Music Recital Hall.

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "The Rev Michael J. Kinnamon a seminary dean from Lexington, Ky is at the center of a debate over homosexuality as the General Assembly of the Christian Church (Disciples of Christ) convenes in Tulsa."

Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Rosemary Burkholder relaxes with her Japanese Akita dog."

Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "North Oklahoma City's celebrated Graffiti Bridge is gone, but some Edmond teen-agers apparently decided this recently completed bridge along the Kilpatrick Turnpike over Kelley Avenue would make a fine substitute."

Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Rosemary Burkholder finds job as a personal chef demanding, but rewarding."

Global data bases of trace gas emissions to the atmosphere have been compiled for the use in atmospheric chemistry studies. The resolution provided is a 1{degree} latitude by 1{degree} longitude. A series of 3 data bases has been provided. The first is an inventory of emissions of NO{sub x} from fossil fuel combustion, while the second is an inventory of SO{sub 2} emissions from the same anthropogenic source. The third database includes a global inventory of the emissions of NO{sub x} from terrestrial biomass burning and is given seasonally for the globe. The units of emission for the inventories are given as the mass in metric tons of N for the NO{sub x} inventories and metric tons of S for the SO{sub 2} inventory for each 1{degree} {times} 1{degree} grid. The emissions are expected to represent the emissions for the year 1980. The biomass burning source is given for 2 seasons where XXXXjul represents an ascii file containing the cumulated emissions for the months from April to September, and XXXXjan represents October to March. The grid for these data bases, (i,j) arrays, is (360,180), which represents 1 degree (lon,lat) resolution. The Table shows a description of each data base and …

This document provides a trend analysis for the Savannah River Reactor Restart Program. The data contained in this report is comprised of Nonconformance Report (NCR), Surveillance Reports, and Corrective Action Reports (CAR). The data trended now includes six quarters and provides the capability of looking at changing patterns in the various performance categories over time.

This document provides a trend analysis for the Savannah River Reactor Restart Program. The data contained in this report is comprised of Nonconformance Report (NCR), Surveillance Reports, and Corrective Action Reports (CAR). The data trended now includes six quarters and provides the capability of looking at changing patterns in the various performance categories over time.

Letter to the editor from Howard Okon voicing strong objections to the new ordinances affecting the Oak Lawn district.

Daily newspaper from Sulphur Springs, Texas that includes local, state, and national news along with advertising.

Photograph used for a story in the Daily Oklahoman newspaper.

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Quest International vice president David S. Miller"

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "John Marshall defenders Allahim Crutison, left and Marvis Jones go after Putnam North's Chad Newton in junior varsity football action."

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Southwestern Bell Telephone attorney Glen Glass,right,said at Bell's rate hearing Monday at the Corporation Commission that James Proctor,left,the agency's utility division director,made "outrageous accusations" about the telephone utility."

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "In 1956 Russell Wilson was the first black to quarterback a team to a state title. (Douglas High School)"

Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Black Chronicle Publisher."

Photograph used for a story in the Daily Oklahoman newspaper.

B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story. Story aired at 10pm.

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story. This story aired at 6 P.M.

Six new solid solution type compounds have been prepared using high temperature techniques and characterized by means of single crystal x-ray techniques during a study of the metal-rich region of the ternary Ta-Nb-S system. The structures of Nb{sub x}Ta{sub 11-x}S{sub 4} are reminiscent of niobium-rich sulfides, rather than of tantalum-rich sulfides. The coordinations of sulfur are capped trigonal prismatic while the metal coordinations are capped distorted cubic prismatic for Nb{sub x}Ta{sub 11-x}S{sub 4}, and capped distorted cubic prismatic and pentagonal prismatic for Nb{sub 12-x}Ta{sub x}S{sub 4}. The structures of Nb{sub x}Ta{sub 5-x}S{sub 2} contain homoatomic layers sequenced S-M3-M2-M1-M2-M3-S (M is mixed Nb, Ta) generating six-layer sheets, respectively. Weak S-S interactions at 3.26 and 3.19{Angstrom} between sheets contrast with the M-M binding within and between the sheets in these two novel layered compounds. The former are presumably responsible for the observed graphitic slippage of the samples. Nb{sub 21-x}Ta{sub x}S{sub 8} and Nb{sub x}Ta{sub 2-x}S are isostructural with Nb{sub 21}S{sub 8} and Ta{sub 2}S, respectively. Extended Hueckel band calculations were carried out for two layered compounds, Nb{sub x}Ta{sub 5-x}S{sub 2} (x {approx} 1.72) and Nb{sub x}ta{sub 2-x}S (x {approx} 0.95). Based upon band calculations metallic properties can be expected for these two …

Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.

Funeral program for Mr. Jewel (Sugar-Babe) Haynes, born September 27, 1924 and died October 1, 1991. The funeral was held Monday, October 7, 1991 at Friendship Baptist Church, officiated by Rev. R. L. Archield, Sr. Funeral arrangements were made through D. W. Brooks and he was buried in Fort Sam Houston National Cemetery near San Antonio, Texas.