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623 Matching Results
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Chemistry of Mercury Species and Their Control in Coal Combustion
Silica aggregates produced in a tubular aerosol reactor were classified according to the electrical mobility equivalent radius by differential mobility analyzer. Then E the classified aerosol was further analyzed by in situ light scattering measurement and TEM micrograph analysis to evaluate the properties of agglomerates, such as the radius of gyration, fractal dimension, primary particle diameter and number of primary particles. Based on the properties measured by the experiments, the actual surface area of the silica sorbent particles can be calculated.
Date:
February 28, 1998
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
The Daily Chickasha Star (Chickasha, Okla.), Vol. 97, No. 32, Ed. 1 Saturday, February 28, 1998
Newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
February 28, 1998
Creator:
Settle, David
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Dissociative-recombination product states and the dissociation energy D<sub>0</sub> of Ne<sub>2</sub><sup>+</sup>
Final product states of Ne<sub>2</sub><sup>+</sup> dissociative recombination were studied using time-of-flight spectroscopy to determine the kinetic energies released. The dissociative recombination occurred in a sustained discharge in the presence of a variable magnetic field and discharge voltage, at pressures of 5-15 mTorr. Under different conditions various excited states were observed ranging from the lowest 3<i>s</i> metastable states to higher Rydbcrg states within 0.000 54 eV of the dissociation limit. From their narrow widths, it is deduced that these higher states arose from Ne<sub>2</sub><sup>+</sup> ions with subthermal energies. From two of these narrow distributions, we obtain an improved value for the dissociation limit D<sub>0</sub>(Ne<sub>2</sub><sup>+</sup>)= 1.26±0.02 eV.
Date:
February 28, 1998
Creator:
Hardy, K. A.; Peterson, J. R.; Ramos, G. & Sheldon, J. W.
Object Type:
Report
System:
The UNT Digital Library
[DNA Sample Manipulation and Automation.] Final report
None
Date:
February 28, 1998
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Effect of Fluid Flow on Inclusion Coarsening in Low-Alloy Steel Welds
Oxide inclusions form in welds because of deoxidation reactions in the weld pool. These inclusions control the weld microstructure development. Thermodynamic and kinetic calculation of oxidation reaction can describe inclusion characteristics such as number density, size, and composition. Experimental work has shown that fluid-flow velocity gradients in the weld pool can accelerate inclusion growth by collision and coalescence. Moreover, fluid flow in welds can transport inclusions to different temperature regions that may lead to repeated dissolution and growth of inclusions. These phenomena are being studied with the help of computational coupled heat transfer, fluid-flow, thermodynamic, and kinetic models. The results show that the inclusion formation in steel welds can be described as a function of the welding processes, process parameters, and steel composition.
Date:
February 28, 1998
Creator:
Babu, S.S.; David, S.A.; DebRoy, T. & Hong, T.
Object Type:
Article
System:
The UNT Digital Library
Ensemble: 1998-02-28 - African Percussion Ensemble
Ensemble performance at the UNT College of Music Concert Hall.
Date:
February 28, 1998
Creator:
African Percussion Ensemble
Object Type:
Sound
System:
The UNT Digital Library
Final Report - Satellite Calibration and Verification of Remotely Sensed Cloud and Radiation Properties Using ARM UAV Data (February 28, 1995 - February 28, 1998)
The work proposed under this agreement was designed to validate and improve remote sensing of cloud and radiation properties in the atmosphere for climate studies with special emphasis on the use of satellites for monitoring these parameters to further the goals of the Atmospheric Radiation Measurement (ARM) Program.
Date:
February 28, 1998
Creator:
Minnis, Patrick
Object Type:
Report
System:
The UNT Digital Library
First Annual Meeting of the Institute of Multifluid Science and Technology (IMUST)
This report consists of summaries of the 6 Action Items from the first annual meeting. The 6 Action Items are: (1) to aggressively pursue ''Education'' in multiphase flow; (2) to pursue the work on dispersed flows presented in the last meeting to conclusions; (3) to focus the next meeting on flow regimes; (4) to pursue cooperative efforts toward identifying and settling key flow regime issues; (5) to pursue cooperative efforts towards the understanding and development of design tools, for multiphase stirred vessels (including sparged, slurry liquids); and (6) to continue to refine the TAC efforts towards useful conclusions.
Date:
February 28, 1998
Creator:
unknown
Object Type:
Article
System:
The UNT Digital Library
The Gilmer Mirror (Gilmer, Tex.), Vol. 121, No. 17, Ed. 1 Saturday, February 28, 1998
Semiweekly newspaper from Gilmer, Texas that includes local, state, and national news along with advertising.
Date:
February 28, 1998
Creator:
Overton, Mac
Object Type:
Newspaper
System:
The Portal to Texas History
[News Clip: Escapee]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
February 28, 1998, 10:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Roosevelt]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
February 28, 1998, 6:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
A NOVEL APPROACH TO CATALYTIC DESULFURIZATION OF COAL
The reactions of dialkyl mono- and disulfides and functionalized alkylthio compounds with sodium in refluxing hydrocarbon solvent (tetradecane, mesitylene or toluene) resulted in sulfur-free products in very high yields. Greater than 95% sulfur removal was observed when dialkyl mono or polysulfides were treated with Na in liquid ammonia. Polycyclic aromatic sulfur heterocycles were only moderately desulfurized under these conditions while phenylthio derivatives gave thiophenol as the major product and dithiophenols as the minor products.
Date:
February 28, 1998
Creator:
Verkade, John G.
Object Type:
Report
System:
The UNT Digital Library
Pawhuska Journal-Capital (Pawhuska, Okla.), Vol. 88, No. 17, Ed. 1 Saturday, February 28, 1998
Semiweekly newspaper from Pawhuska, Oklahoma that includes local, state, and national news along with advertising.
Date:
February 28, 1998
Creator:
Gann, Sherry
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Separation of Flue-Gas Scrubber Sludge into Marketable Products
The reduction of sulfur oxides from high sulfur coal burning utility companies has resulted in the production of huge quantities of wet flue-gas desulfurization scrubber sludge. A typical 400 MW power station burning a coal containing 3.5% sulfur by weight and using a limestone absorbent would produce approximately 177,000 tons (dry weight) of scrubber sludge per year. This brownish colored, finely divided material contains calcium sulfite (CaSO{sub 3} {center_dot} 1/2 H{sub 2}O), calcium sulfate (CaSO{sub 4} {center_dot} 2H{sub 2}O), unreacted limestone (CaCO{sub 3}), and various other impurities such as fly-ash and iron oxide particles. The physical separation of the components of scrubber sludge would result in the re-use of this material. The primary use would be conversion to a highly pure synthetic gypsum. This technical report concentrates on the effect of baffle configuration on the separation of calcium sulfite/sulfate from limestone. The position of the baffles as they related to the feed inlet, and the quantity of the baffles were examined. A clean calcium sulfite/sulfate (less than 2.0% limestone by weight) was achieved with the combination of water-only cyclone and horizontally baffled column.
Date:
February 28, 1998
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Summary of Motorcycle Involved Accidents in the State of Texas for Calendar Year 1997
Annual report providing tabular statistical information about motor vehicle accidents that involved motorcycles in Texas during calendar year 1997, with data broken out by various criteria including number of persons, locations, types of accidents, time of day, and other factors.
Date:
February 28, 1998
Creator:
Texas. Department of Public Safety. Accident Records Bureau.
Object Type:
Report
System:
The Portal to Texas History
Texas Statewide School Bus Accidents: Calendar Year 1997
Annual report providing tabular statistical information about motor vehicle accidents that directly or indirectly involved school buses in Texas during calendar year 1997, with data broken out by various criteria including number of persons, locations, types of accidents, time of day, and other factors.
Date:
February 28, 1998
Creator:
Texas. Department of Public Safety. Accident Records Bureau.
Object Type:
Report
System:
The Portal to Texas History
327 Building liquid waste handling options modification project plan
This report evaluates the modification options for handling radiological liquid waste (RLW) generated during decontamination and cleanout of the 327 Building. The overall objective of the 327 Facility Stabilization Project is to establish a passively safe and environmentally secure configuration of the 327 Facility. The issue of handling of RLW from the 327 Facility (assuming the 34O Facility is not available to accept the RLW) has been conceptually examined in at least two earlier engineering studies (Parsons 1997a and Hobart l997). Each study identified a similar preferred alternative that included modifying the 327 Facility RLWS handling systems to provide a truck load-out station, either within the confines of the facility or exterior to the facility. The alternatives also maximized the use of existing piping, tanks, instrumentation, controls and other features to minimize costs and physical changes. An issue discussed in each study involved the anticipated volume of the RLW stream. Estimates ranged between 113,550 and 387,500 liters in the earlier studies. During the development of the 324/327 Building Stabilization/Deactivation Project Management Plan, the lower estimate of approximately 113,550 liters was confirmed and has been adopted as the baseline for the 327 Facility RLW stream. The goal of this engineering study …
Date:
March 28, 1998
Creator:
Ham, J.E.
Object Type:
Report
System:
The UNT Digital Library
The Bastrop Advertiser (Bastrop, Tex.), Vol. 145, No. 8, Ed. 1 Saturday, March 28, 1998
Semi-weekly newspaper from Bastrop, Texas that includes local, state, and national news along with advertising.
Date:
March 28, 1998
Creator:
McAuley, Davis
Object Type:
Newspaper
System:
The Portal to Texas History
The Daily Chickasha Star (Chickasha, Okla.), Vol. 97, No. 45, Ed. 1 Saturday, March 28, 1998
Newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
March 28, 1998
Creator:
Settle, David
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Gilmer Mirror (Gilmer, Tex.), Vol. 121, No. 25, Ed. 1 Saturday, March 28, 1998
Semiweekly newspaper from Gilmer, Texas that includes local, state, and national news along with advertising.
Date:
March 28, 1998
Creator:
Overton, Mac
Object Type:
Newspaper
System:
The Portal to Texas History
Less minimal supersymmetric standard model
Most of the phenomenological studies of supersymmetry have been carried out using the so-called minimal supergravity scenario, where one assumes a universal scalar mass, gaugino mass, and trilinear coupling at M{sub GUT}. Even though this is a useful simplifying assumption for phenomenological analyses, it is rather too restrictive to accommodate a large variety of phenomenological possibilities. It predicts, among other things, that the lightest supersymmetric particle (LSP) is an almost pure B-ino, and that the {mu}-parameter is larger than the masses of the SU(2){sub L} and U(1){sub Y} gauginos. We extend the minimal supergravity framework by introducing one extra parameter: the Fayet'Iliopoulos D-term for the hypercharge U(1), D{sub Y}. Allowing for this extra parameter, we find a much more diverse phenomenology, where the LSP is {tilde {nu}}{sub {tau}}, {tilde {tau}} or a neutralino with a large higgsino content. We discuss the relevance of the different possibilities to collider signatures. The same type of extension can be done to models with the gauge mediation of supersymmetry breaking. We argue that it is not wise to impose cosmological constraints on the parameter space.
Date:
March 28, 1998
Creator:
de Gouvea, Andre; Friedland, Alexander & Murayama, Hitoshi
Object Type:
Article
System:
The UNT Digital Library
[News Clip: Feud Rowlett]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
March 28, 1998, 10:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Garage Protest]
B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
March 28, 1998, 6:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Garage Protest]
B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
March 28, 1998, 6:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library