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[AIDS ARMS Network monthly service report]
A blank monthly service report prepared by the AIDS ARMS Network for the AIDS Resource Center, dated January 31, 1990.
Date:
January 31, 1990
Creator:
AIDS ARMS Network, Inc.
Object Type:
Text
System:
The UNT Digital Library
[News Release: AIDS Interfaith Network Full Year of Service]
A news release from the AIDS Interfaith Network serving the community for a full year as of January 1, 1990 and what was done the first year.
Date:
January 11, 1990
Creator:
AIDS Interfaith Network
Object Type:
Text
System:
The UNT Digital Library
[News Release: AIDS Interfaith Network AA Community]
A news release from the AIDS Interfaith Network about how the organization hosting AIDS service providers from the African American community to develop a coalition.
Date:
January 17, 1990
Creator:
AIDS Interfaith Network Inc.
Object Type:
Text
System:
The UNT Digital Library
AIDS Update, Volume 5, Number 1, January 1990
Monthly newsletter describing news and events related to the AIDS Resource Center in Dallas, Texas as well as articles, letters, advice columns, and advertisements of interest to subscribers.
Date:
January 1990
Creator:
AIDS Resource Center (Dallas, Tex.)
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
AIDS Update, Volume 5, Number 7, July 1990
Monthly newsletter describing news and events related to the AIDS Resource Center in Dallas, Texas as well as articles, letters, advice columns, and advertisements of interest to subscribers.
Date:
January 1990
Creator:
AIDS Resource Center (Dallas, Tex.)
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
Hydrogeologic characterization of the cretaceous-tertiary Coastal Plain sequence at the Savannah River Site
Several hydrostratigraphic classification schemes have been devised to describe the hydrogeology at the Savannah River Site SRS. Central to these schemes is the one-to-one fixed relationship between the hydrostratigraphic units and the lithostratigraphic units currently favored for the Site. This fixed relationship has proven difficult to apply in studies of widely separated locations at the Site due to the various facies observed in the updip Coastal Plain sequence. A detailed analysis and synthesis of the geophysical, core, and hydrologic data available from more than 164 deep wells from 23 cluster locations both on the Site and in the surrounding region was conducted to provide the basis for a hydrostratigraphic classification scheme which could be applied to the entire SRS region. As a result, an interim hydrostratigraphic classification was developed that defines the regional hydrogeologic characteristics of the aquifers underlying the Site (Aadland et al., 1990). The hydrostratigraphic code accounts for and accommodates the rapid lateral variation in lithofacies observed in the region, and eliminates all formal'' connection between the hydrostratigraphic nomenclature and the lithostratigraphic nomenclature. The code is robust and can be made as detailed as is needed to characterize the aquifer units and aquifer zones described in Site-specific studies. …
Date:
January 1, 1990
Creator:
Aadland, R. K.
Object Type:
Article
System:
The UNT Digital Library
Lithological and hydrological characteristics of the tertiary hydrostratigraphic systems of the general separations area at the Savannah River Site
The General Separations Area (GSA) is an approximately 15-square-mile area near the geographic center of the Savannah River Site (SRS). The SRS is located in the Upper Atlantic Coastal Plain physiographic province of South Carolina on the Aiken Plateau at an elevation of approximately 300 feet above mean sea level. The sedimentary sequence of the GSA comprises unconsolidated sediments ranging in age from Cretaceous to Holocene with isolated zones of consolidated sediments. The Tertiary sediments are composed of sand, silt, clay, and calcareous materials of varying composition. The alpha-numeric hydrostratigraphic nomenclature proposed by Aadland (1990) is used herein. The Tertiary-age lithostratigraphic sequence at the GSA is composed predominantly of terrigenous clastics interspersed with carbonate-rich clastics and limestones. The calcareous lithologies are discontinuous and divided into a lower and upper zone. 15 refs., 2 figs.
Date:
January 1, 1990
Creator:
Aadland, R.K. (Westinghouse Savannah River Co., Aiken, SC (USA)); Harris, M.K. & Westbrook, T.M. (Dames and Moore, Atlanta, GA (USA))
Object Type:
Article
System:
The UNT Digital Library
The Soviet-American gallium experiment at Baksan
A gallium solar neutrino detector is sensitive to the full range of the solar neutrino spectrum, including the low-energy neutrinos from the fundamental proton-proton fusion reaction. If neutrino oscillations in the solar interior are responsible for the suppressed {sup 8}B flux measured by the Homestake {sup 37}Cl experiment and the Kamiokande water Cherenkov detector, then a comparison of the gallium, chlorine, and water results may make possible a determination of the neutrino mass difference and mixing angle. A 30-ton gallium detector is currently operating in the Baksan laboratory in the Soviet Union, with a ratio of expected solar signal to measured background (during the first one to two {sup 71}Ge half lives) of approximately one. 28 refs.
Date:
January 1, 1990
Creator:
Abazov, A. I.; Abdurashitov, D. N.; Anosov, O. L.; Danshin, S. N.; Eroshkina, L. A.; Faizov, E. L. et al.
Object Type:
Article
System:
The UNT Digital Library
First Results From the Soviet-American Gallium Experiment
The Soviet-American Gallium Experiment is the first experiment able to measure the dominant flux of low energy p-p solar neutrinos. Four extractions made during January to May 1990 from 30 tons of gallium have been counted and indicate that the flux is consistent with 0 SNU and is less than 72 SNU (68% CL) and less than 138 SNU (95% CL). This is to be compared with the flux of 132 SNU predicted by the Standard Solar Model. 10 refs., 4 figs., 1 tab.
Date:
January 1, 1990
Creator:
Abazov, A. I.; Abdurashitov, D. N.; Anosov, O. L.; Eroshkina, L. A.; Faizov, E. L.; Gavrin, V. N. et al.
Object Type:
Article
System:
The UNT Digital Library
Experience with certifying borated stainless steel as a shipping cask basket material
The original cask designs for a cask demonstration project featured fuel baskets constructed of borated stainless steel (bss) as a structural material. The project is intended to demonstrate casks that can be used for both shipping and storing spent nuclear fuel assemblies. The baskets were intended to maintain the fuel assemblies in a subcritical array for both normal and accident conditions. The Nuclear Regulatory Commission, however, judged bss to be unacceptable as a structural material. The cask designs were subsequently modified. The knowledge gained during this cask demonstration project may be applicable to development of bss as a basket material in future cask design. 6 refs., 2 figs., 2 tabs.
Date:
January 1, 1990
Creator:
Abbott, D.G. (EG and G Idaho, Inc., Idaho Falls, ID (USA)) & Nickell, R.E. (Applied Science and Technology, Inc., Poway, CA (USA))
Object Type:
Article
System:
The UNT Digital Library
Elucidation of fundamental properties of helium in metals by nuclear magnetic resonance techniques
The nuclear magnetic resonance (NMR) properties of very high density {sup 3}He in metals are discussed in the context of the corresponding properties in relatively high density bulk {sup 3}He. In particular, the effects of the {sup 3}He diffusion on the contribution of the {sup 3}He-{sup 3}He dipolar interaction to the lineshape and to the spin-lattice relaxation parameter (T{sub 1}) are described. It is shown that the temperature dependence of the lineshape and of T{sub 1} are independent sources of information about helium density and also about helium diffusivity. Moreover, T{sub 1} is shown to be a sensitive indicator of melting transitions in bulk {sup 3}He. Palladium tritide is presented as a model system for NMR studies of {sup 3}He in metals. Experimental NMR studies of this system reveal behavior analogous to what has been observed for bulk helium. Evidence for a {sup 3}He phase transition near 250 K is provided by the temperature dependence of T{sub 1}. Assuming this to be a melting transition, a density is obtained from the bulk helium EOS that is in good agreement with theory and with swelling measurements on related metal tritides. {sup 3}He NMR measurements have also provided information about the density …
Date:
January 1, 1990
Creator:
Abell, G.C.
Object Type:
Article
System:
The UNT Digital Library
[Abilene City Council Minutes: 1990]
Ledger containing minutes of the City Council in Abilene, Texas documenting the group's discussions and activities from January to December 1990.
Date:
1990-01-11/1990-12-20
Creator:
Abilene (Tex.)
Object Type:
Book
System:
The Portal to Texas History
Abilene Philharmonic Playbill: January 27, 1990
Program for an Abilene Philharmonic concert that ran on January 27th, 1990 during the 40th season. It includes information about the pieces performed, artists and musicians, and advertising from local companies.
Date:
January 1990
Creator:
Abilene Philharmonic
Object Type:
Pamphlet
System:
The Portal to Texas History
Geochemistry of Salado Formation brines recovered from the Waste Isolation Pilot Plant (WIPP) repository
Intergranular brines recovered from the repository horizon of the Waste Isolation Pilot Plant (WIPP) have major- and trace-element compositions that reflect seawater evaporation and diagenetic processes. Brines obtained from repository drill holes are heterogenous with respect to composition, but their compositional fields are distinct from those obtained from fluid inclusions in WIPP halite. The heterogeneity of brine compositions within the drill-hole population indicates a lack of mixing and fluid homogenization within the salt at the repository level. Compositional differences between intergranular (drill hole) and intragranular (fluid inclusions) brines is attributed to isolation of the latter from diagenetic fluids that were produced from dehydration reactions involving gypsum and clay minerals. Modeling of brine-rock equilibria indicates that equilibration with evaporite minerals controls the concentrations of major elements in the brine. Drill-hole brines are in equilibrium with the observed repository minerals halite, anhydrite, magnesite, polyhalite and quartz. The equilibrium model supports the derivation of drill-hole brines from near-field fluid, rather than large-scale vertical migration of fluids from the overlying Rustler or underlying Castile Formations. 13 refs., 6 figs., 6 tabs.
Date:
January 1, 1990
Creator:
Abitz, R.; Myers, J.; Drez, P. & Deal, D.
Object Type:
Article
System:
The UNT Digital Library
A novel approach to highly dispersing catalytic materials in coal for gasification
This project seeks to develop a technique, based on coal surface properties, for highly dispersing catalysts in coal for gasification and to investigate the potential of using potassium carbonate and calcium acetate mixtures as catalysts for coal gasification. The work is focused on the elucidation of coal-catalyst precursor interactions in solution and the variables which control the adsorption and dispersion of coal gasification metal catalysts. In order to optimize coal-metal ion interactions and hence maximize catalyst activity, the study examines the surface electrochemistry of a lignite, subbituminous, and bituminous coals and their demineralized and oxidized derivatives prior to loading with the catalytic materials. The surface electrical properties of the coals are investigated with the aid of electrophoresis, while the effects of the surface charge on the co-adsorption of K{sup +} and Ca{sup 2+} are studied by agitating the coals with aqueous solutions of potassium and calcium. 8 refs., 6 figs.
Date:
January 1, 1990
Creator:
Abotsi, G.M.K. & Bota, K.B.
Object Type:
Report
System:
The UNT Digital Library
A novel approach to highly dispersing catalytic materials in coal for gasification
This project seeks to develop a technique, based on coal surface properties, for highly dispersing catalysts in coal for gasification and to investigate the potential of using potassium carbonate and calcium acetate mixtures as catalysts for coal gasification. The work is focused on the elucidation of coal-catalyst precursor interactions in solution and the variables which control the adsorption and dispersion of coal gasification metal catalysts. In order to optimize coal-metal ion interactions and hence maximize catalyst activity, the study examines the surface electrochemistry of a lignite, a subbituminous, and a bituminous coals and their demineralized and oxidized derivatives prior to loading with the catalytic materials. The surface electrical properties of the coals are investigated with the aid of electrophoresis, while the effects of the surface charge on the adsorption of K{sup +} and Ca{sup 2+} are studied by agitating the coals with aqueous solutions of potassium and calcium. Zeta potential studies show that the surfaces of the lignite are negatively charged between about pH2 to 11, the negative charge density increasing with increase in pH. Highly alkaline media promoted calcium adsorption due to high negative charge on the coal, while calcium uptake was inhibited in strongly acidic solutions.
Date:
January 1, 1990
Creator:
Abotsi, M.K. & Bota, K.B.
Object Type:
Report
System:
The UNT Digital Library
Hydrogeochemical investigations in support of well logging operations at the Zunil geothermal field, Guatemala
A suite of 41 thermal and nonthermal waters in the Zunil-Quetzaltenango region, Guatemala, were collected as part of a well logging operation conducted by the Instituto Nacional de Electrificacion (INDE) and Los Alamos National Laboratory. Both in situ and weirbox samples were collected in the Zunil geothermal field. The various data suggest that the reservoir at Zunil is geochemically inhomogeneous. Stable isotope data suggest recharge to the field comes primarily from the north and east whereas tritium data indicate that the reservoir waters may be 500 to 7500 years old. 14 refs., 4 figs., 3 tabs.
Date:
January 1, 1990
Creator:
Adams, A.; Golf, F.; Trujillo, P. E., Jr.; Counce, D.; Archuleta, J.; Dennis, B. (Los Alamos National Lab., NM (USA)) et al.
Object Type:
Article
System:
The UNT Digital Library
Application of plasma shield technology to the reduction, treatment, and disposal of hazardous organic and/or mixed wastes with actinide recovery
Los Alamos research activities are currently directed at the application of the shielded hydrogen plasma torch to the direct production of actinide metals from a UF{sub 6} feedstock. Two broad classes of thermal plasma reactors are currently in widespread use: the direct current (dc) arc jet system and the radio frequency (rf) inductively coupled system. Los Alamos has improved upon the basic rf plasma tube design using the concept of a transformer. The unique feature of the Los Alamos tube is a segmented, cooled, internal radiation shield. The Los Alamos shielded plasma torch routinely achieves temperatures exceeding 10,000 K and electron densities of 10{sup 16}/cm{sup 3} when operated continuously at one atmosphere of argon. These highly energetic conditions are sufficient to dissociate most chemical compounds into their constituent atoms. Based upon these characteristics, Los Alamos is currently investigating the application of the shielded plasma torch technology to the destruction of organic and mixed hazardous wastes, as well as the direct production of actinide metals from the halides and oxides, without the cogeneration of contaminated wastes. 5 refs., 4 figs.
Date:
January 1, 1990
Creator:
Adams, B. Todd; Vaughan, Larry L.; Joyce, Edward L., Jr. & Bieniewski, Thomas M.
Object Type:
Article
System:
The UNT Digital Library
2DPUF: A sequential gaussian puff model
This report documents the Environmental Transport Section's (ETS) two-dimensional, sequential gaussian puff transport and dispersion model for emergency response. The sequential puff scheme is described, and the dispersion equations are presented. The advantages of this model over the ETS's PUFF/PLUME model are discussed. Options are calculating a two-dimensional wind field, interpolation procedures, and the wind field grid are described. The various grid systems for puff transport calculations and dose estimates are also described. A flow diagram for the modules comprising the 2DPUF code and a description of each module is presented.
Date:
January 1, 1990
Creator:
Addis, R.P. & O'Steen, B.L.
Object Type:
Report
System:
The UNT Digital Library
Investigation of ultrasonic wave interactions with fluid-saturated porous rocks
Investigation of ultrasonic waves, especially the slow compressional wave, with fluid-saturated porous solids, especially rocks. This research effort should fine applications in the geophysical evaluation of fluid-bearing porous rocks where parameters such as tortuosity, permeability, saturation level, and internal impurities are difficult to measure by conventional techniques. The proposed investigation may be divided into three major subtasks: Experimental study of surface wave propagation on fluid-saturated porous materials. A new, so-called direct excitation technique will be used on both air- and water-saturated samples; further development of the Lamb wave technique recently introduced to study guided wave propagation in thin fluid-saturated porous plates. The analytical treatment will be extended to account for viscous losses and scattering inhomogeneities; and theoretical and experimental study of slow wave propagation in fluid-saturated natural rocks. A new technique based on the transmission of airborne ultrasound through air-saturated porous plates will be used to determine properties such as tortuosity, permeability, etc. 22 refs., 37 figs., 3 tabs.
Date:
January 1, 1990
Creator:
Adler, L.
Object Type:
Report
System:
The UNT Digital Library
Nuclear Spectroscopy With Si PIN Diode Detectors at Room Temperature
The characteristics of PIN diodes have been determined. These diodes have lower leakage currents and noise than other types of Si radiation detectors. The energy resolutions (FWHM) of a 1 cm{sup 2} {times} 0.5 mm PIN diode measured with a pulser, 122.0 keV gamma rays, 193 keV electrons, and 5.5-MeV alpha particles were 2.6, 2.8, 2.9, and 11.0 keV, respectively. For a 6 mm {times} 6 mm {times} 0.2 mm PIN diode, the resolutions (FWHM) for a pulser, 60 keV {gamma}-rays, 193 keV electrons, and 5.5-MeV, {alpha}-particles were 2.1, 2.2, 2.4, and 10.8 keV, respectively. 11 refs., 5 figs., 1 tab.
Date:
January 1, 1990
Creator:
Ahmad, I.; Betts, R. R.; Happ, T.; Henderson, D. J.; Wolfs, F. L. H. & Wuosmaa, A. H.
Object Type:
Article
System:
The UNT Digital Library
Single particle states in the heaviest known nuclei
Neutron single-particle states above the N=152 subshell have been studied by high-resolution (d,p) reaction on a {sup 250}Cf target. All of the orbitals between N=152 and N=164 subshells have been identified. A tentative assignment has been made for the 1/2-(750) Nilsson state. 10 refs.
Date:
January 1, 1990
Creator:
Ahmad, I.; Chasman, R.R.; Friedman, A.M. (Argonne National Lab., IL (USA)) & Yates, S.W. (Kentucky Univ., Lexington, KY (USA))
Object Type:
Article
System:
The UNT Digital Library
Thermal-hydraulic model of a solid-oxide fuel cell. [17. 5 watts]
A mathematical model has been developed to simulate the electrochemistry and thermal hydraulics in a monolithic solid oxide fuel cell (MSOFC). Dividing a single cell layer into a number of nodes, the model sets up the steady-state heat and mass transfer equations for each node in a cell layer. Based on the average thermal and compositional conditions at each node and a specified cell voltage, the model calculates the Nernst potential and the resultant current, heat generation, and heat removal rates at each node. These calculations yield the temperature and the fuel and oxidant compositions and partial pressure matrices for the entire cell. The simulation also provides related performance data for the fuel cell stack, such as energy efficiency, fuel utilization, and power density. The model can be used to simulate operation with different fuel gases, such as hydrogen, coal gas, and methanol reformate. A mathematical model such as this can be used to examine the effects of changing one or more of the various design variables and to evaluate the effectiveness of fabrication improvements in technology development. In the design phase, the model can be used to determine the size of the stack that will be required for a …
Date:
January 1, 1990
Creator:
Ahmed, S. & Kumar, R.
Object Type:
Article
System:
The UNT Digital Library
Noninvasive studies of human visual cortex using neuromagnetic techniques
The major goals of noninvasive studies of the human visual cortex are: to increase knowledge of the functional organization of cortical visual pathways; and to develop noninvasive clinical tests for the assessment of cortical function. Noninvasive techniques suitable for studies of the structure and function of human visual cortex include magnetic resonance imaging (MRI), positron emission tomography (PET), single photon emission tomography (SPECT), scalp recorded event-related potentials (ERPs), and event-related magnetic fields (ERFs). The primary challenge faced by noninvasive functional measures is to optimize the spatial and temporal resolution of the measurement and analytic techniques in order to effectively characterize the spatial and temporal variations in patterns of neuronal activity. In this paper we review the use of neuromagnetic techniques for this purpose. 8 refs., 3 figs.
Date:
January 1, 1990
Creator:
Aine, C. J.; George, J. S.; Supek, S. (Los Alamos National Lab., NM (USA)) & Maclin, E. L. (Veterans Administration Medical Center, Albuquerque, NM (USA). Center for Magnetoencephalography)
Object Type:
Article
System:
The UNT Digital Library