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391 Matching Results
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Measurements of surface ocean carbon dioxide partial pressure during WOCE
Progress during the past year of research under Measurements of Surface Ocean Carbon Dioxide Partial Pressure During WOCE'' has been significant. As was described in our previous progress report, the startup phase of this research was severely frustrated by delays in the US WOCE Hydrographic Program (WHP), which in turn were caused by delays in the mid-life refit of the R/V Knorr. As a result the high latitude southeastern Pacific work (WHP lines P19S and P16S) originally scheduled for the 1990 austral summer has still not been carried out. As a substitute, the smaller R/V Thomas Washington was pressed into service during mid-1991 to carry out lower-latitude portions of the WHP P16 and P17 lines - the TUNES Expedition. Because this ship is much smaller than the R/V Knorr, she could not carry a full complement of WHP programs and seagoing personnel and was restricted by her size and the time of year to lower-latitude work. Our original proposal for carbon dioxide measurements was designed to divide the work between legs in which we participated as part of the WHP dissolved CFC program (under separate NSF funding) and legs in which we entrusted the operation of our system to other …
Date:
February 25, 1992
Creator:
Weiss, R.F.
Object Type:
Report
System:
The UNT Digital Library
Experimental and computer modeling studies of isotopically selective two-step laser photodissociation of small molecules
The approach to laser isotope separation taken in this study is based on isotopically selective, two-step, laser photodissociation of small molecules. A primary goal of this study is the measurement of fundamental molecular processes which control the two-step, photodissociative isotope enrichment process. This objective has led to experimental measurements of uv photodissociation cross sections for vibrationally excited states of several small molecules, including the first cross section reported for any neutral molecule in a specific, excited vibrational state. A second goal of this study has been the laboratory demonstration of isotope enrichment for isotopes of practical interest and for processes with a potential for larger scale production. Where possible, efforts have focussed on the separation of middle isotopes, such as {sup 17}O and {sup 33}S, which are expensive and difficult to separate using other techniques. Considerable success has been achieved in demonstrating the enrichment of isotopes of bromine, carbon, oxygen and a third goal of this study has been the application of computer modeling to the two-step enrichment process. Experimental measurements define as many as possible of the critical photophysical and chemical parameters required by an ab initio computer model of the enrichment process. Progress toward these goals has been …
Date:
March 25, 1992
Creator:
Zittel, P.F.
Object Type:
Report
System:
The UNT Digital Library
[News Clip: Kids gifts]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, featuring children opening gifts on Christmas morning. The story aired at 6pm.
Date:
December 25, 1992
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Kids gifts]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, featuring kids opening Christmas gifts on Christmas morning. The story aired at 10pm.
Date:
December 25, 1992
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
The Tulia Herald (Tulia, Tex.), Vol. 84, No. 26, Ed. 1 Thursday, June 25, 1992
Weekly newspaper from Tulia, Texas that includes local, state and national news along with extensive advertising.
Date:
June 25, 1992
Creator:
Reynolds, Jim
Object Type:
Newspaper
System:
The Portal to Texas History
[WASP at Lone Star Museum of Flight]
Photograph of several WASP standing in two groups to the left and right in a flight museum. Many are dressed either in uniform or special blazer with reunion patches and scarves. Airplanes, flags, and a podium with an air force wings flag hanging from the front can be seen in the back ground. A note written on the bottom edge of the photo reads, "Lone Star Museum of Flight, April 25, 1992, Spirit of Flight Airshow, Honoring WASP". A second note written on the back of the photo reads, "Micky Brown 2201 N. DeLeon, Victoria".
Date:
April 25, 1992
Creator:
unknown
Object Type:
Photograph
System:
The Portal to Texas History
Novel reactor configuration for synthesis gas conversion to alcohols
Our objectives during this quarter was to complete studies on the kinetics of methanol synthesis reaction in the slurry reactor with long periods of on stream studies, start experimentation in the trickle bed reactor assembly, investigate simulation studies using the piston-exchange (PE) and piston-dispersion-exchange (PDE) models, and introduce water gas shift reaction as the second reaction in our simulation studies.
Date:
January 25, 1992
Creator:
Akgerman, A. & Anthony, R. G.
Object Type:
Report
System:
The UNT Digital Library
Two dimensional NMR and NMR relaxation studies of coal structure
This report covers the progress made on the title project for the project period. Four major areas of inquiry are being pursued. Advanced solid state NMR methods are being developed to assay the distribution of the various important functional groups that determine the reactivity of coals. Special attention is being paid to methods that are compatible with the very high magic angle sample spinning rates needed for operation at the high magnetic field strengths available today. Polarization inversion methods utilizing the difference in heat capacities of small groups of spins are particularly promising. Methods combining proton-proton spin diffusion with [sup 13]C CPMAS readout are being developed to determine the connectivity of functional groups in coals in a high sensitivity relay type of experiment. Additional work is aimed at delineating the role of methyl group rotation in the proton NMR relaxation behavior of coals.
Date:
November 25, 1992
Creator:
Zilm, K.W.
Object Type:
Report
System:
The UNT Digital Library
Formation rate of ammonium nitrate in the off-gas line of SRAT and SME in DWPF
A mathematical model for the formation rate of ammonium nitrate in the off-gas line of the Sludge Receipt and Adjustment Tank (SRAT) and the Slurry Mixed Evaporator (SME) in DWPF has been developed. The formation rate of ammonium nitrate in the off-gas line depends on pH, temperature, volume and total concentration of ammonia and ammonium ion. Based on a typical SRAT and SME cycle in DWPF, this model predicts the SRAT contributes about 50 lbs of ammonium nitrate while SME contributes about 60 lbs of ammonium nitrate to the off-gas line.
Date:
February 25, 1992
Creator:
Lee, L.
Object Type:
Report
System:
The UNT Digital Library
Equilibrium ammonium concentration in slurry mix evaporator condensate tank (SMECT) with ammonia scrubbers
During design reviews of the Recycle Colection Tank (RCT) at the Savannah River Site it was determined that in all cases the RCT scrub solution could not be routed to the RCT. During transfers to the tank farm (estimated ten hour cycle), the ammonia evolved from the RCT is scrubbed by the RCT scrubber and the ammonia scrub water must be returned to the SMECT. The result of this is an increased steady state concentration of ammonium in the SMECT water used for the ammonia scrubbers. The maximum ammonium concentration is necessary for the sizing of the ammonia scrubbers for the Sludge Receipt and Adjustment Tank (SRAT),Slurry Mix Evaporator (SME), and RCT.
Date:
September 25, 1992
Creator:
Lambert, D. P.
Object Type:
Report
System:
The UNT Digital Library
Reactor components P-11/K-15 re-inspection standards
The Mark 22 assemblies previously charged to the P Reactor as the P-11 charge, but never irradiated, are stored in borated racks in Building 105-K Assembly Area. The assemblies are stored inside aluminum cans into which they are placed and subsequently dried upon removal from the P-Reactor. This report discusses non-destructive examinations supplemented by destructive examination of a small number of these assemblies made to establish the acceptability of these assemblies for use as the K-15 charge.
Date:
August 25, 1992
Creator:
Banks, J.J.
Object Type:
Report
System:
The UNT Digital Library
Nitrogen availability as a control mechanism of secondary succession within a semiarid shrubland ecosystem
Three experiments were conducted within a semiarid shrubland to test the role of nitrogen availability as a control mechanism in secondary succession. Secondary succession patterns were documented for seven years and effects of increased and decreased N availability levels, fumigation, and competition by early-seral species were tested. Differential responses by seral species were determined and related to successional patterns. Nitrogen availability was found to be a primary mechanism controlling the rate of succession. Relative growth rate was an important factor determining which species initially dominated and N availability became the primary control factor by the third year. As N availability increased, the rate of succession decreased. Conversely, as N availability was decreased, the rate of succession increased. The abundance of annuals was increased and abundance of perennials decreased by increased N availability. Tissue N concentration was related to lifeform and seral position, and these relationships were important in the transition from early- to mid-seral stages. Decomposer subsystem dynamics were correlated with seral community dynamics. The effect of fumigation was minimized by initially planting with late-seral species. A conceptual model of secondary succession is presented based on N availability, relative growth rate, lifeform, and decomposition dynamics.
Date:
September 25, 1992
Creator:
Redente, E.F. & McLendon, T.
Object Type:
Report
System:
The UNT Digital Library
Published assessments bearing on the future use of ceramic superconductors by the electric power sector
Much has been written about ceramic superconductors since their discovery in 1986. Most of this writing reports and describes scientific research. However, some authors have sought to put this research in context: to assess where the field stands, what might be technically feasible, what might be economically feasible, and what potential impacts ceramic superconductors will bring to the electric power sector. This report's purpose is to make the results of already published assessments readily available. To that end, this report lists and provides abstracts for various technical and economic assessments related to applications of High-Temperature Superconductors (HTS) to the electric power sector. Those studies deemed most important are identified and summarized. These assessments were identified by two means. First, members of the Executive Committee identified some reports as worthy of consideration and forwarded them to Argonne National Laboratory. Twelve assessments were selected. Each of these is listed and summarized in the following section. Second, a bibliographic search was performed on five databases: INSPEC, NTIS, COMPENDEX, Energy Science Technology, and Electric Power Database. The search consisted of first selecting all papers related to High Temperature Superconductors. Then papers related to SMES, cables, generators, motors, fault current limiters, or electric utilities were …
Date:
August 25, 1992
Creator:
Giese, R. F. & Wolsky, A. M.
Object Type:
Report
System:
The UNT Digital Library
[Fort Worth Star-Telegram clipping, March 25, 1992]
A clipping from the Fort Worth Star-Telegram covering two locations, Dallas and Denton. In Dallas, Warren Morgan was named the President Emeritus of Paul Quinn College and David Stevens was named the chief fiscal officer of the same institution. In Denton, artwork from 55 elementary students of Fort Worth, Hurst-Euless-Bedford, and four other school districts is on display at UNT's Art Building.
Date:
March 25, 1992
Creator:
Fort Worth Star-Telegram
Object Type:
Clipping
System:
The UNT Digital Library
[Fort Worth Star-Telegram Press Clips, March 25, 1992]
A clipping from the Fort Worth Star-Telegram covering an event in Denton. Artwork from 55 elementary students of Fort Worth, Hurst-Euless-Bedford, and four other school districts is on display at UNT's Art Building.
Date:
March 25, 1992
Creator:
{{{name}}}
Object Type:
Clipping
System:
The UNT Digital Library
Oral History Interview with Dick Hooper, May 25, 1992
Access:
Use of this item is restricted to the UNT Community
Interview with Dick Hooper, veteran army nurse from Mount Zion, Illinois. The interview recounts his experiences as a nurse and anesthetist in Vietnam, 1969-70. His civilian and military educations are covered, as well as his experiences with the 18th Surgical Hospital at Camp Evans, Quang Tri City, battle casualties, social life, and relations with the Vietnamese. Also included are his personal thoughts about U.S. involvement in Vietnam.
Date:
May 25, 1992
Creator:
Houser, Cindy & Hooper, W. Richard (Dick)
Object Type:
Book
System:
The UNT Digital Library
Cherokeean/Herald (Rusk, Tex.), Vol. 144, No. 21, Ed. 1 Thursday, June 25, 1992
Weekly newspaper from Rusk, Texas that includes local, state and national news along with extensive advertising.
Date:
June 25, 1992
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Texas Register, Volume 17, Number 15, Pages 1479-1564, February 25, 1992
A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date:
February 25, 1992
Creator:
Texas. Secretary of State.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Texas Register, Volume 17, Number 64, Pages 5765-5815, August 25, 1992
A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date:
August 25, 1992
Creator:
Texas. Secretary of State.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Texas Register, Volume 17, Number 73, Pages 6573-6658, September 25, 1992
A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date:
September 25, 1992
Creator:
Texas. Secretary of State.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Texas Register, Volume 17, Number 96, Pages 9057-9151, December 25, 1992
A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date:
December 25, 1992
Creator:
Texas. Secretary of State.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Hg removal from SRTC laboratory waste using an in-tank ion exchange probe
An in-tank ion exchange column, described here, has been constructed to operate in the waste tanks at the Savannah River Technology Center (SRTC). The purpose of the column is to remove dissolved mercury from laboratory wastes and capture them on Duolite{trademark} GT-73 resin. This paper summarizes the results of operation of such a column on two batches of waste in one high activity tank and on one batch of waste in a low activity tank for the purpose of removing mercury from the liquid wastes. Sufficient mercury decontamination was demonstrated with the in-tank resin removal system, after twenty four hours of operation in each tank, to render the waste nonhazardous and enable shipment to the F-Area evaporator.
Date:
September 25, 1992
Creator:
Bibler, J. P. & DeGange, J. J.
Object Type:
Report
System:
The UNT Digital Library
Equilibrium ammonium concentration in slurry mix evaporator condensate tank (SMECT) with ammonia scrubbers
During design reviews of the Recycle Colection Tank (RCT) at the Savannah River Site it was determined that in all cases the RCT scrub solution could not be routed to the RCT. During transfers to the tank farm (estimated ten hour cycle), the ammonia evolved from the RCT is scrubbed by the RCT scrubber and the ammonia scrub water must be returned to the SMECT. The result of this is an increased steady state concentration of ammonium in the SMECT water used for the ammonia scrubbers. The maximum ammonium concentration is necessary for the sizing of the ammonia scrubbers for the Sludge Receipt and Adjustment Tank (SRAT),Slurry Mix Evaporator (SME), and RCT.
Date:
September 25, 1992
Creator:
Lambert, D. P.
Object Type:
Report
System:
The UNT Digital Library
Innovative Clean Coal Technology (ICCT): 180 MW demonstration of advanced tangentially-fired combustion techniques for the reduction of nitrogen oxide (NO{sub x}) emissions from coal-fired boilers. Technical progress report, second quarter 1992
This quarterly report discusses the technical progress of a US Department of Energy (DOE) Innovative Clean Coal Technology (ICCT) Project demonstrating advanced tangentially-fired combustion techniques for the reduction of nitrogen oxide (NO{sub x}) emissions from a coal-fired boiler. The project is being conducted at Gulf Power Company`s Plant Lansing Smith Unit 2 located near Panama City, Florida. The primary objective of this demonstration is to determine the long-term effects of commercially available tangentially-fired low NO{sub x} combustion technologies on NO{sub x} emissions and boiler performance. A target of achieving fifty percent NO{sub x} reduction using combustion modifications has been established for the project. The stepwise approach that is being used to evaluate the NO{sub x} control technologies requires three plant outages to successively install the test instrumentation and the different levels of the low NO{sub x} concentric firing system (LNCFS). Following each outage, a series of four groups of tests are performed. These are (1) diagnostic, (2) performance, (3) long-term, and (4) verification. These tests are used to quantify the NO{sub x} reductions of each technology and evaluate the effects of those reductions on other combustion parameters such as particulate characteristics and boiler efficiency. This technical progress report presents the …
Date:
November 25, 1992
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library