Texas Pecan Pest Management Newsletter, Volume 95, Number 1, April 1995 (open access)

Texas Pecan Pest Management Newsletter, Volume 95, Number 1, April 1995

Newsletter focusing on pecan disease and pest control in Texas, including prevention, identification, treatment, and educational opportunities.
Date: April 3, 1995
Creator: Texas Agricultural Extension Service
Object Type: Journal/Magazine/Newsletter
System: The Portal to Texas History
Next nuclear challenge - how do we dispose of the excess nuclear materials? (open access)

Next nuclear challenge - how do we dispose of the excess nuclear materials?

The ''Cold War'' was not fought only by soldiers but by scientists and engineers in Laboratories and plants located throughout the world. With the fall of the Berlin Wall, the ''Cold War'' was effectively over, but the weapons of nuclear war remained. Following signing of START 2 (Strategic Arms Reduction Treaty) in 1993, up to 100 tonnes of weapons usable plutonium is expected to be declared excess by the Super Powers. Steps must be taken to address the proliferation risks associated with this plutonium. Again the scientist and engineers, who were the ''Cold War'' warriors, are being asked to develop methods to disposition this plutonium such that it can never again be used for weapons. Will we burn the plutonium in reactors or immobilize the plutonium either in a glass or ceramic matrix? Interesting challenges face chemists and chemical engineers developing immobilization techniques to render the plutonium both environmentally benign, and proliferation resistant.
Date: April 3, 1997
Creator: Gray, L W
Object Type: Article
System: The UNT Digital Library
X/Qs and unit dose calculations for Central Waste Complex interim safety basis effort (open access)

X/Qs and unit dose calculations for Central Waste Complex interim safety basis effort

The objective for this problem is to calculate the ground-level release dispersion factors (X/Q) and unit doses for onsite facility and offsite receptors at the site boundary and at Highway 240 for plume meander, building wake effect, plume rise, and the combined effect. The release location is at Central Waste Complex Building P4 in the 200 West Area. The onsite facility is located at Building P7. Acute ground level release 99.5 percentile dispersion factors (X/Q) were generated using the GXQ. The unit doses were calculated using the GENII code. The dimensions of Building P4 are 15 m in W x 24 m in L x 6 m in H.
Date: April 3, 1996
Creator: Huang, C. H.
Object Type: Report
System: The UNT Digital Library
Buckling of elliptical rings under uniform external pressure (open access)

Buckling of elliptical rings under uniform external pressure

A thin, elastic elliptical ring is subjected to uniform external pressure. The lowest critical pressure is computed and presented for various ratio of the major axis to the minor axis of the elliptical ring. It is found that the critical pressure for an elliptical ring is higher than that for the circular ring whose diameter is equal to the major axis of the elliptical ring. It can be shown that under the same external pressure, the axial force developed in the elliptical ring is less than that developed in the corresponding circular ring. Thus, a higher pressure is required to buckle the elliptical rings. Therefore, by changing the shape of the ring from circular to elliptical, the capability of the ring to sustain the external pressure can be increased substantially. The results of this study can be useful in the design of elliptical reinforcing rings and thin-walled tubes subjected to external pressure.
Date: April 3, 1991
Creator: Tang, Y.
Object Type: Report
System: The UNT Digital Library
The evolution of a successful systems engineering organization at Hanford (open access)

The evolution of a successful systems engineering organization at Hanford

As the systems engineering activities at the US Department of Energy`s Hanford reservation have matured, they have been placed in many positions within the management structure. Some of these have been more successful than others. This paper describes the organizational evolution of systems engineering over the last few years to its current successful configuration. Background The US Department of Energy (DOE) owns the 640 square mile Hanford reservation located in southeast Washington State (Figure 1). The Site has been operated for DOE by a team of contractors, who read like a Who`s Who in American Industry. Throughout its history from its founding in 1943 until 1991, Hanford`s primary mission was to produce special nuclear material for the nuclear weapons program. This mission resulted in significant quantities of radioactive and mixed waste that is stored on the site in a variety of forms. In addition much of the surface area, subsurface soil, and groundwater are contaminated to various degrees. The Reservation is located on the banks of the Columbia River, and the avoidance of contaminating the waterway that services the Pacific Northwest is a national concern. In 1991, the mission of the Hanford Site was changed from production to environmental cleanup. …
Date: April 3, 1998
Creator: Grygiel, M. L.
Object Type: Article
System: The UNT Digital Library
Reversed-field pinch studies in the Madison Symmetric Torus (open access)

Reversed-field pinch studies in the Madison Symmetric Torus

Studies of large-size (R = 1.5 m, a = 0.5 m), moderate current (I < 750 kA) reversed-field pinch (RFP) plasmas are carried out in the Madison Symmetric Torus in order to evaluate and improve RFP confinement, study general toroidal plasma MHD issues, determine the mechanism of the RFP dynamo, and measure fluctuation-induced transport and anomalous ion heating. MST confinement has been improved by reduction of magnetic field errors with correction coils in the primary circuit and reduction of impurities using boronization; high densities have been achieved with hydrogen pellet injection. MHD tearing modes with poloidal mode number m = 1 and toroidal mode numbers n = 5--7 are prevalent and nonlinearly couple to produce sudden relaxations akin to tokamak sawteeth. Edge fluctuation-induced transport has been measured with a variety of insertable probes. Ions exhibit anomalous heating, with increases of ion temperature occuring during strong MHD relaxation. The RFP dynamo has been studied with attention to various possible mechanisms, including motion-EMF drive, the Hall effect, and superthermal electrons. Initial profile control experiments have begun using insertable biased probes and plasma guns. The toroidal field capacity of MST will be upgraded during Summer, 1993 to allow low-current tokamak operation as well …
Date: April 3, 1993
Creator: Hokin, S.; Almagri, A.; Cekic, M.; Chapman, B.; Crocker, N.; Den Hartog, D. J. et al.
Object Type: Report
System: The UNT Digital Library
Transcript of Commission on Structural Alternatives for the Federal Courts of Appeals Hearing: April 3, 1998 (open access)

Transcript of Commission on Structural Alternatives for the Federal Courts of Appeals Hearing: April 3, 1998

Transcript of a public hearing held by the Commission on Structural Alternatives for the Federal Courts of Appeals held April 3, 1998 in Chicago, Illinois. This hearing includes testimony from judges, attorneys, and officials of the Ninth and Seventh Circuit U.S. Court of Appeals on the possible restructuring of the Ninth Circuit Court. It also includes testimony from William Richman, a Professor of Law, and Peter Jon Simpson on behalf of the Christian Legal Education Association.
Date: April 3, 1998
Creator: United States. Administrative Office of the United States Courts.
Object Type: Text
System: The UNT Digital Library
Development of a catalyst for conversion of syngas-derived materials to isobutylene. Quarterly report No. 3, September 30, 1991--December 30, 1991 (open access)

Development of a catalyst for conversion of syngas-derived materials to isobutylene. Quarterly report No. 3, September 30, 1991--December 30, 1991

The CO conversion and isobutylene yield for Runs 11 to 20 (except run 12) at the conditions of 450{degree}C, 1,200 psig, and 1,920 gas hourly space velocity (GHSV), Is given in Table 2. These conditions generally provide the maximum CO conversion for each run. Runs 5 to 10 is also provided in Table 2 for a comparison. The description of the catalysts also given in Table 2 includes the composition, method of preparation, and calcination temperature for each catalyst tested. Data for Runs 12 and 21 are at different conditions, as discussed later in this report. The conversion and yield data were obtained at relatively short times on-stream ({approximately}11 hours). The extent of catalyst deactivation has not been determined. The freshly precipitated CeO{sub 2} catalyst, IS-9, is by far the most active but is poorly selective to Isobutene. The catalyst primarily produces saturated by-products. The commercial CeO{sub 2,} IS-8, had low surface area and little activity. Earlier tests show that lowering the calcination temperature of precipitated catalysts produced higher surface areas, higher tetragonal content, higher activity and higher yields. The ZrO{sub 2} sol-gel catalysts show a similar relationship. A comparison of Run 9 (ZrO{sub 2} calcined at 600{degree}C) and Run …
Date: April 3, 1992
Creator: Gajda, G. J.
Object Type: Report
System: The UNT Digital Library
Texas Parks & Wildlife News, April 3, 1992 (open access)

Texas Parks & Wildlife News, April 3, 1992

Weekly newsletter discussing natural resources, parks, hunting and fishing, and other information related to the outdoors in Texas.
Date: April 3, 1992
Creator: Texas. Parks and Wildlife Department.
Object Type: Journal/Magazine/Newsletter
System: The Portal to Texas History
Reversed-field pinch studies in the Madison Symmetric Torus (open access)

Reversed-field pinch studies in the Madison Symmetric Torus

Studies of large-size (R = 1.5 m, a = 0.5 m), moderate current (I < 750 kA) reversed-field pinch (RFP) plasmas are carried out in the Madison Symmetric Torus in order to evaluate and improve RFP confinement, study general toroidal plasma MHD issues, determine the mechanism of the RFP dynamo, and measure fluctuation-induced transport and anomalous ion heating. MST confinement has been improved by reduction of magnetic field errors with correction coils in the primary circuit and reduction of impurities using boronization; high densities have been achieved with hydrogen pellet injection. MHD tearing modes with poloidal mode number m = 1 and toroidal mode numbers n = 5--7 are prevalent and nonlinearly couple to produce sudden relaxations akin to tokamak sawteeth. Edge fluctuation-induced transport has been measured with a variety of insertable probes. Ions exhibit anomalous heating, with increases of ion temperature occuring during strong MHD relaxation. The RFP dynamo has been studied with attention to various possible mechanisms, including motion-EMF drive, the Hall effect, and superthermal electrons. Initial profile control experiments have begun using insertable biased probes and plasma guns. The toroidal field capacity of MST will be upgraded during Summer, 1993 to allow low-current tokamak operation as well …
Date: April 3, 1993
Creator: Hokin, S.; Almagri, A.; Cekic, M.; Chapman, B.; Crocker, N.; Den Hartog, D.J. et al.
Object Type: Report
System: The UNT Digital Library
MGA (Multi-Group Analysis): A Gamma-Ray Spectrum Analysis Code for Determining Plutonium Isotopic Abundances (open access)

MGA (Multi-Group Analysis): A Gamma-Ray Spectrum Analysis Code for Determining Plutonium Isotopic Abundances

Nondestructive measurements of x-ray and gamma-ray emissions can be used to analyze a sample for plutonium. This report describes the methods and algorithms we have developed for analyzing gamma-ray spectra obtained by using a germanium detector system to accurately determine the relative abundances of various actinide isotopes in a sample. Our methodology requires no calibrations and can be used to measure virtually any size and type of plutonium sample. Measurement times can be as short as a few minutes; measurements are frequently accurate to within 1%. Our methods have been programmed into a computerized analysis code called MGA (Multi-Group Analysis). Our current versions can be run on personal computers (IBM type) and on the DEC VAX microcomputer. Spectral analysis times are usually far less than a minute. 28 refs., 26 figs., 1 tab.
Date: April 3, 1990
Creator: Gunnink, R
Object Type: Report
System: The UNT Digital Library
Development of a catalyst for conversion of syngas-derived materials to isobutylene (open access)

Development of a catalyst for conversion of syngas-derived materials to isobutylene

The CO conversion and isobutylene yield for Runs 11 to 20 (except run 12) at the conditions of 450[degree]C, 1,200 psig, and 1,920 gas hourly space velocity (GHSV), Is given in Table 2. These conditions generally provide the maximum CO conversion for each run. Runs 5 to 10 is also provided in Table 2 for a comparison. The description of the catalysts also given in Table 2 includes the composition, method of preparation, and calcination temperature for each catalyst tested. Data for Runs 12 and 21 are at different conditions, as discussed later in this report. The conversion and yield data were obtained at relatively short times on-stream ([approximately]11 hours). The extent of catalyst deactivation has not been determined. The freshly precipitated CeO[sub 2] catalyst, IS-9, is by far the most active but is poorly selective to Isobutene. The catalyst primarily produces saturated by-products. The commercial CeO[sub 2,] IS-8, had low surface area and little activity. Earlier tests show that lowering the calcination temperature of precipitated catalysts produced higher surface areas, higher tetragonal content, higher activity and higher yields. The ZrO[sub 2] sol-gel catalysts show a similar relationship. A comparison of Run 9 (ZrO[sub 2] calcined at 600[degree]C) and Run …
Date: April 3, 1992
Creator: Gajda, G.J.
Object Type: Report
System: The UNT Digital Library
Fluid dynamics of double diffusive systems (open access)

Fluid dynamics of double diffusive systems

The major accomplishments of our initial research period (August 1, 1987, to March 1, 1990) are as follows; we completed construction of the experimental facility. Originally, it had been our intent to modify an existing facility in our laboratory. When this became impractical we constructed a new stand-alone facility. Modified an existing three-dimensional numerical code developed in our laboratory, SEAFLOS1, by incorporating a salinity transport equation. Developed experimental and analytical techniques, and performed both physical and numerical experiments for a wide range of initial and boundary conditions. Focused our overall research effort to answer the following four questions pertaining to the formation of convective intrusions due to lateral temperature gradients established by sidewall heating. (1) What is the internal structure of the convective intrusions as a function of the initial stratification and sidewall heating rates (2) What is the correct scaling for the initial vertical dimension of the intrusions (3) How does the merging process vary as a function of initial stratification and sidewall heating rate (4) Is the sidewall heating critical for continued propagation of the intrusions, or is it merely a trigger which releases the internal instability in the fluid
Date: April 3, 1990
Creator: Koseff, J. R.
Object Type: Report
System: The UNT Digital Library
Studies of the mirrortron ion accelerator concept and its application to heavy-ion drivers (open access)

Studies of the mirrortron ion accelerator concept and its application to heavy-ion drivers

The Mirrortron accelerator is a plasma-based ion accelerator concept that, when implemented, should permit both higher acceleration gradients and higher peak-current capabilities than is possible with conventional induction-type accelerators. Control over the acceleration and focussing of an accelerated beam should approach that achieved in vacuum-field-based ion accelerators. In the Mirrortron a low density (10{sup 10} to 10{sup 11} cm{sup {minus}3}) hot electron'' plasma is confined by a long solenoidal magnetic field capped by mirrors''. Acceleration of prebunched ions is accomplished by activating a series of fast-pulsed mirror coils spaced along the acceleration tube. The hot electrons, being repelled by mirror action, leave the plasma ions behind to create a localized region of high electrical gradient (up to of order 100 MV/m). At the Laboratory an experiment and analyses to elucidate the concept and its scaling laws as applied to heavy-ion drivers are underway and will be described. 4 refs., 5 figs.
Date: April 3, 1991
Creator: Post, R.F.; Schwager, L.A.; Dougless, S.R.; Jones, B.R.; Lambert, M.A. & Larson, D.L.
Object Type: Article
System: The UNT Digital Library
Choosing and implementing a computer system for plant lubrication: Nine steps to success (open access)

Choosing and implementing a computer system for plant lubrication: Nine steps to success

Rapid advances in computer software offer may opportunities for increasing efficiency and productivity; however, choosing the right software package and achieving its full potential can be a challenging task. Lubrication engineers faced with the selection and implementation of a computer system will find that they can increase their chance of success when they follow the nine steps outlined in this paper. These steps provide a solid framework for managing the project through its full life-cycle from initial conception until final retirement of the system. Lubrication Departments that already have computer systems in place can also benefit from these steps by picking up at the corresponding point in the system's life and following the remaining steps.
Date: April 3, 1991
Creator: Nook, J. C.
Object Type: Report
System: The UNT Digital Library
EC Hidraulic Drive Cylinder Relief Vlave Test (open access)

EC Hidraulic Drive Cylinder Relief Vlave Test

This engineering note documents the testing of the set pressure of the EC hydraulic drive cylinder relief valve. The purpose of the relief valve is to provide a safety measure in the event that oil becomes trapped in the rod side of the cylinder and pressure is applied to the cap side. The note includes an explanation of the procedure used and a summary of the result of the testing done on February 14, 1991 by Gary Trotter. The result was that the cylinder relief valve relieved at the correct set pressure of 10,500 psig. The basic concern is for the protection of the cylinder. The pump is capable of providing up to 10,500 psi of pressure to either side of the cylinder. The cylinder is rated for 10,500 psi. Under normal operating conditions, the valves would be open, and the pumping pressure would automatically flow oil into one side, and remove oil from the other side. If, however, the valve for the other side was closed, so that oil could not be removed, then the pressure would build in that side. If the rod side is pressurized to the maximum pump pressure of 10,500 psi, the cross sectional area …
Date: April 3, 1991
Creator: Wu, J.
Object Type: Report
System: The UNT Digital Library
Legislative Powers of Congress: A Brief Reference Guide (open access)

Legislative Powers of Congress: A Brief Reference Guide

None
Date: April 3, 1997
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Violent and Abusive Behavior in Youth: A Public Health Problem (open access)

Violent and Abusive Behavior in Youth: A Public Health Problem

The Viruses, Serums, Toxins, Antitoxins, and Analogous Products Act (21 U.S.C. 151-159), also known as the Virus-Serum-Toxin Act (VSTA), is intended to assure the safe and effective supply of animal vaccines and other biological products. The act and its applicable regulations are administered by the Animal and Plant Health Inspection Service (APHIS) of the United States Department of Agriculture (USDA).
Date: April 3, 1998
Creator: Monke, Jim
Object Type: Report
System: The UNT Digital Library
Characterization of air toxics from a laboratory coal-fired combustor (open access)

Characterization of air toxics from a laboratory coal-fired combustor

Emissions of hazardous air pollutants from coal combustion were studied in a laboratory-scale combustion facility, with emphasis on fine particles in three size ranges of less than 7.5 {mu}m diameter. Vapors were also measured. Substances under study included organic compounds, anions, elements, and radionuclides. Fly ash was generated by firing a bituminous coal in a combuster for 40 h at each of two coal feed rates. Flue gas was sampled under two conditions. Results for organic compounds, anions, and elements show a dependence on particle size consistent with published power plant data. Accumulation of material onto surface layers was inferred from differences in chemical composition between the plume simulating dilution sampler and hot flue samples. Extracts of organic particulate material were fractionated into different polarity fractions and analyzed by GC/MS. In Phase II, these laboratory results will be compared to emissions from a full-scale power plant burning the same coal.
Date: April 3, 1995
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Long-term decontamination engineering study. Volume 1 (open access)

Long-term decontamination engineering study. Volume 1

This report was prepared by Westinghouse Hanford Company (WHC) with technical and cost estimating support from Pacific Northwest Laboratories (PNL) and Parsons Environmental Services, Inc. (Parsons). This engineering study evaluates the requirements and alternatives for decontamination/treatment of contaminated equipment at the Hanford Site. The purpose of this study is to determine the decontamination/treatment strategy that best supports the Hanford Site environmental restoration mission. It describes the potential waste streams requiring treatment or decontamination, develops the alternatives under consideration establishes the criteria for comparison, evaluates the alternatives, and draws conclusions (i.e., the optimum strategy for decontamination). Although two primary alternatives are discussed, this study does identify other alternatives that may warrant additional study. hanford Site solid waste management program activities include storage, special processing, decontamination/treatment, and disposal facilities. This study focuses on the decontamination/treatment processes (e.g., waste decontamination, size reduction, immobilization, and packaging) that support the environmental restoration mission at the Hanford Site.
Date: April 3, 1995
Creator: Geuther, W.J.
Object Type: Report
System: The UNT Digital Library
Energy changes in transforming solids. Final report, January 31, 1991--January 31, 1995 (open access)

Energy changes in transforming solids. Final report, January 31, 1991--January 31, 1995

The following topics are discussed: A new thermodynamical theory of continuum damage mechanics capable of incorporating non-isothermal processes and of providing explicit expressions for the thermal dissipation during damage evolution; the advancement of the methodology of heterogenization to analyze elastic bodies with defects; and investigations of bonded dissimilar piezoelectric half-spaces.
Date: April 3, 1995
Creator: Herrmann, G. & Barnett, D.M.
Object Type: Report
System: The UNT Digital Library
San Antonio Monthly Reports: March 1995 (open access)

San Antonio Monthly Reports: March 1995

Compilation of monthly reports from departments in the city of San Antonio, Texas providing statistics, project updates, and other information about services and activities.
Date: April 3, 1995
Creator: San Antonio (Tex.)
Object Type: Report
System: The Portal to Texas History
San Antonio Monthly Reports: March 1998 (open access)

San Antonio Monthly Reports: March 1998

Compilation of monthly reports from departments in the city of San Antonio, Texas providing statistics, project updates, and other information about services and activities.
Date: April 3, 1998
Creator: San Antonio (Tex.)
Object Type: Report
System: The Portal to Texas History
San Antonio Monthly Reports: March 1990 [Part 2] (open access)

San Antonio Monthly Reports: March 1990 [Part 2]

Compilation of monthly reports from departments in the city of San Antonio, Texas providing statistics, project updates, and other information about services and activities.
Date: April 3, 1990
Creator: San Antonio (Tex.)
Object Type: Report
System: The Portal to Texas History