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A Comparison of Some Characteristics and Attitudes of Self-Described Future Mothers versus Non-Mothers

Description: This study compared women with a highly positive interest in becoming mothers with women having little interest in having children,with respect to biographical data, childrearing attitudes, and personality characteristics. One hundred twenty-one undergraduate college women were administered a biographical questionnaire, the Parental Attitude Research Instrument, the Adjective Check List, and an attitude index designed to assess level of interest in having children. A statistical analysis revealed the remarkable similarity of the two groups of women, as the groups differed significantly in only two areas. Women with little interest in having children scored higher on the subscale Ascendancy of the Mother, and the women also differed in their view of the ideal situation for an adult woman.
Date: May 1975
Creator: Cofer, Jeanne
Partner: UNT Libraries

Clothing Preferences of Large-Size Women Who Shop in Large-Size Specialty Stores in the North Dallas Area

Description: This study investigated the clothing preferences of large-size women who shopped in selected large-size specialty stores in North Dallas. Questions were asked regarding the respondents' age, employment, income, dress size and degree of fashion-consciousness. Also investigated were preferences regarding apparel and shopping sources. A questionnaire was used to obtain the desired information. Based on the data obtained, it was found that large-size women have certain preferences concerning the clothing they purchase and the sources they shop.
Date: May 1979
Creator: Meriwether, Judith
Partner: UNT Libraries

Particle characterization: July--September, 1970

Description: The effect of particle size, shape and surface on the behavior of a powder is continually being studied. In quality control of a powder, seldom is a given parameter known well enough to predict accurately overall behavior of a powder. Therefore, many particle parameters must be evaluated to determine the influencing factors, including width, length/width ratio, volume, surface area, reentrant surface, bulk density, compressibility, surface roughness, pore volume, degree of sphericity, etc., and their relation to extrudability, pressability, firing performance, etc. Determining these things is called powder or particle characterization.
Date: 1970
Creator: Duncan, A. A.
Partner: UNT Libraries Government Documents Department

HE particle characterization. Quarterly report, October--December, 1971

Description: A comparison of data obtained in the Quality Division and the Development Division using the Fisher Sub-Sieve Sizer has been made. The results show no statistically significant difference between the two laboratories. The method of obtaining suitable photomicrographs for Zeiss particle analysis has been adapted to the Chemistry Laboratory equipment.
Date: December 31, 1971
Creator: Giberson, R.C.
Partner: UNT Libraries Government Documents Department

Particle characterization. Quarterly report October--December, 1970

Description: In the manufacture of Extex (XTX 8003, 80% PETN, 20% Sylgard silicone rubber), the formulation is mixed for about five hours. Freon MF is added in the proportions of fur pounds Extex to one quart Freon, to enhance the mixing at lower power than would otherwise be the case. After mixing, the formulation is milled on a three-roll rubber mill for a total of 25 passes. The study of the effects of roll milling on Extex was started; the visual results are indicative that a considerable reduction in crystal size occurs during the formulation process.
Date: December 31, 1970
Creator: Duncan, A.A.
Partner: UNT Libraries Government Documents Department

Encapsulation of explosive particles by parylene. Quarterly report, October--December, 1971

Description: Parylene is the generic name for members, e.g. parylene N,C,D of a thermoplastic polymer series developed by Union Carbide (Reta is a trade name for the materials). All of the members are laid down by a vacuum, vapor deposition process. The properties and uses for each member of the series differ from each other, but collectively the Parylenes have a wide range of applications. Gas permeability and moisture vapor transmission of Parylene C are very low. These properties make Parylene potentially very useful with or near explosives or components. One of the forms, Parylene C--the monomer of dichloro-di-p-xyly-lene--is potentially attractive. Its density is 1.29 g/cc. In this study the initial emphasis will be on the feasibility of coating HE particles. Substrates of diminishing particle size will be encapsulated to establish the particle-size limitation of the process.
Date: December 31, 1972
Creator: Sandoval, J.
Partner: UNT Libraries Government Documents Department

Liquid filled gap test development. Quarterly report, October--December, 1971

Description: The basic goal of this project is to develop an adequate process for measuring the shock sensitivity of explosive powders (before mixing them into PBX`s, ECX`s or PEX`s, for example). Particle size analysis was performed on several lots of HMX. Two lots were selected to provide three sieve cuts which will be used to give a controlled test of the effect of particle size on shock sensitivity.
Date: December 31, 1971
Creator: Kramer, P.E.
Partner: UNT Libraries Government Documents Department

Electrical Conductivity in Thin Films

Description: This thesis deals with electrical conductivity in thin films. Classical and quantum size effects in conductivity are discussed including some experimental evidence of quantum size effects. The component conductivity along the applied electric field of a thin film in a transverse magnetic field is developed in a density matrix method.
Date: May 1973
Creator: Meyer, Frederick Otto
Partner: UNT Libraries

The Most Important Educational Problems Affecting the Growth of Elementary Schools of Texas, 1972

Description: The problem with which this investigation is concerned is the identification of conditions, situations, and events that are important problems faced in the public elementary schools of Texas. Problems are categorized into sixteen areas: finance, desegregation and busing, school organization, school personnel, preschool and kindergarten, instructional improvement, reporting systems, pupil behavior, curriculum, in-service staff training, humanizing the schools, public relations, minority groups, migrant children, special education, and recent trends. The purpose of the study is to determine perceived importance of problems and to establish priorities of current issues from information obtained from education leaders of elementary schools.
Date: August 1972
Creator: Nicholson, Sara Carolyn, 1922-
Partner: UNT Libraries

Development of a high temperature solar powered water chiller, Volume 4. Phase 1 technical progress report, September 26, 1977--June 1, 1978

Description: The performance of the high temperature solar powered water chiller was evaluated in a solar system. Three climatic regions were selected for the evaluation which represent significant variations in heating to cooling ratio. Typical multi-family and commercial building constructions were selected for each location, and building load files created using the TRNSYS program. Solar system components were selected on a preliminary basis and simulation models were prepared for each, including the chiller. Component cost and total system cost data were developed for economic trade-off studies. It is intended, under this contract, to evaluate various system configurations to determine which best interfaces with the solar driven Rankine unit, both from a performance and economic standpoint. Preliminary parametric studies were begun to identify the best type of system and best component sizing for a commercial building in two cities. Some prelimanry annual performance data have been obtained and related to conventional equipment performance.
Date: June 1, 1978
Creator: English, R. A.
Partner: UNT Libraries Government Documents Department

Production of aluminum--silicon alloy and ferrosilicon and commercial purity aluminum by the direct reduction process. First interim technical report, Phase B, September 1--November 30, 1978

Description: The parameters of charge content, reaction temperatures and residence time were studied in a bench reactor concerning the production of Al--Si and Fe--Si alloys. Results confirmed that minimum final stage reaction temperature is 1950 to 2000/sup 0/C. Residence time varied with initial charge concentration. Fe/sub 2/O/sub 3/ additions to the charge produced a significant increase in metallic yield. A burden preparation procedure was developed for making acceptable agglomerates containing Fe/sub 2/O/sub 3/, bauxite, clay and coke. Particle size distribution of starting materials was correlated with agglomerate strength. A new bench scale reactor was designed and built to facilitate semi-continuous operation, using O/sub 2/ injection to burn coke supporting the burden, resulting in burden movement. In a number of runs bridging of the burden material occurred due to condensation of volatilized sub-oxides in the cooler zones of the reactor. The reactor operated smoothly as an iron blast furnace at 1500/sup 0/C, demonstrating the validity of the equipment and test procedures. Initial construction of pilot reactor VSR-1 was completed. Bench scale fractional crystallizer runs were continued to determine the impurity effects of Fe up to 6.9% and Ti up to 1.25% on alloy product concentration and yield. High levels of impurities formed intermetallic complexes with Al and reduced product yield.
Date: December 1, 1978
Creator: Bruno, M.J.
Partner: UNT Libraries Government Documents Department

Development and application of resistive pulse spectroscopy: studies on the size, form and deformability of red blood cells

Description: The following studies were conducted using the resistive pulse spectroscopy (RPS) technique: cumulative spectra and individual pulse forms for rigid latex polymer spheres; acquisition and analysis of RPS spectral data by means of special computer program; interaction of red blood cells with glutaraldehyde; membrane properties of erythrocytes undergoing abrupt osmotic hemolysis; reversible effects of the binding of chlorpromazine HCl at the red cell membrane surface; effects of high cholesterol diet on erythrocytes of guinea pigs; and multi-population analysis for a mixture of fetal and maternal red cells. (HLW)
Date: January 1979
Creator: Yee, J. P.
Partner: UNT Libraries Government Documents Department

Dislocation substructures in high-energy-rate-forged and press-formed 21-6-9 stainless steel

Description: A Transmission Electron Microscope (TEM) was used to establish that the substructure of press formed (PF) 21-6-9 stainless steel toroids was characterized by a dislocation cell size finer, about 0.16 ..mu..m, than that of about 0.29 ..mu..m, of high-energy-rate-formed (HERF) processed toroids. In addition, HERF processed material showed areas of a coarser, well-developed subgrain structure characteristic of hot work deformation. The formation of the substructures, as-well-as the grain size and carbide distributions of the toroids produced by the two processing techniques, are discussed in terms of the various operations, temperatures, and strain rates associated with the two different processing schedules. The Press-Formed toroid had a higher yield strength than the HERF processed toroid which was attributed to the finer cell size of the PF processed toroid.
Date: July 24, 1978
Creator: Sanderson, E.C.; Brewer, A.W.; Krenzer, R.W. & Krauss, G.
Partner: UNT Libraries Government Documents Department

Dispersion of miscible fluids in porous media. Part 2

Description: Miscible-liquid displacements of water/ethanol solutions were conducted in a 2.54-cm-ID column packed with glass beads of 275 to 300 and 25 to 30 mesh with bed heights of 6.35 to 40.8 cm. The viscosity ratio of the resident fluid to displacing fluid was maintained at 0.72 for fluid pairs with favorable density differences. Dispersion coefficients obtained from a two-parameter model increased from approx.3 x 10/sup -5/ to approx.2 x 10/sup -2/ cm/sup 2//s with increasing packing particle size, fluid velocity, and density difference.
Date: May 24, 1978
Creator: Cheng, Y.L.; Budiman, B. & Machbitz, M.
Partner: UNT Libraries Government Documents Department

Four Ignition TNS Tokamak Reactor Systems: Design Summary

Description: Principal TNS objectives assumed included: (1) demonstration of ignition and burning dynamics; and (2) reactor technology forcing. The selection of an overall design approach for TNS required an early quantitative assessment of the most important design issues; namely, choice of ignition plasma design conditions (principally size and confining field of axis), and choice of toroidal field coil technology (resistive or superconducting windings). The design space investigated in this study ranged from ignited plasmas (elongated) with minor radii varying between 0.8 m (TFTR-like) and approximately 2.0 m (EPR-like). Four TF coil types were examined; these included copper, NbTi, Nb/sub 3/Sn, and a hybrid design employing nested coils of copper and NbTi. A final step involved a further comparison of the four reference concepts using decision modeling techniques as a mechanism for selecting a preferred design approach for the TNS mission. Section 3.0 describes the TNS study process. Section 4.0 presents a summary of the parameters for the four reference point designs. Finally, Section 5.0 presents a brief description of the design features of many of the systems comprising the TNS design.
Date: October 1977
Creator: Flanagan, C. A.
Partner: UNT Libraries Government Documents Department

Estimates of crater dimensions for near-surface explosions of nuclear and high-explosive sources

Description: Crater data from numerous high-explosive (HE) experiments and from fewer nuclear explosive (NE) tests are used to develop an empirically based procedure for predicting crater dimensions from nuclear explosions in various geologic media. The HE crater data are used to rank the cratering efficiency of various geologies. NE crater data from dry soil at the Nevada Test Site and from saturated coral at Eniwetok and Bikini atolls are used to relate NE and HE cratering efficiency. Crater shapes from explosive and impact craters are examined to provide a basis for estimating crater radius and depth in a given geology once the crater volume is known. Best estimates of the crater volume and dimensions are presented along with an estimated range of uncertainty.
Date: September 1, 1976
Creator: Cooper, H.F. Jr.
Partner: UNT Libraries Government Documents Department

Development of an aerosol size classifier. Progress report, May 31, 1977--January 31, 1978

Description: The purpose of this research is to characterize the performance of rectangular slit virtual impactors. A mathematical description of two-dimensional jets of ideal fluid impinging upon a void has been developed using conformal mapping techniques. The analysis includes fluid deflecting plates of finite length inclined at arbitrary angles to the incident jet. Particle trajectories were simulated for various theoretically admissible instrument geometries. Salient features of the particle sizing effectiveness of such devices were determined for a range of void space openings h/w > 1 combined with jet to plate spacing s/w ranging from 0 to 2. Visual observations of two-dimensional jets impinging upon a void were conducted with a scaled-up water model. It was found that excess fluid flux into the void is minimized for a range of jet Reynolds numbers of 750 < Re < 1500. At smaller values of Re wall boundary layers interfere while at larger Re jet core instabilities develop. Modifications were made on an existing prototype virtual impactor to eliminate internal wall losses. Experiments are being performed using mono-dispersed 2.5 ..mu..m DOP particles to determine the magnitude of the internal losses and to fully characterize the instrument response.
Date: January 1, 1978
Creator: Forney, L.J. & Ravenhall, D.G.
Partner: UNT Libraries Government Documents Department

Particle size analysis of HMX

Description: Particle size distribution of three batches of Hercules-supplied HMX were analyzed. The sizes were determined by the specified sieve analysis having a nest range of 180 through 10 ..mu... These sieves were used to comply with Hercules requests; they are also those customarily used for HMX qualification. Five analyses for each batch were performed on the material >10 ..mu.. and duplicates analysis for the <10 ..mu.. material.
Date: October 27, 1972
Creator: Duncan, A.A.
Partner: UNT Libraries Government Documents Department

Research on the physical properties of geothermal reservoir rock. Quarterly report, March 1978

Description: A laboratory study of the P-wave velocity and electric resistivity was undertaken on Cenozoic volcanic rocks collected from the Columbia Plateau volcanic basin (C) and the Jemez volcanic field (NM). Electric resistivities of cylindrical samples saturated with 0.1 N NaCl solution were measured using a four electrode system and a 1.0 KHz frequency source. Seismic P-wave velocities were calculated from measured transit time of mechanical pulses generated and received by piezoelectric transducers. The electric resistivity of water saturated samples decreased as temperature increased to the boiling point of water. Above boiling point, resistivity increased rapidly as water changed to vapor. Resistivity is most sensitive to temperature changes between 35/sup 0/C to 65/sup 0/C. Resistivities of samples increased with decrease in saturation. The effect is more pronounced at lower temperatures. No dependence of seismic P-wave velocities on temperature was observed. Both resistivity and P-wave velocity depend on porosity. The increase in porosity results in a decrease in the resistivity formation factor. Assuming a relationship FF = a phi/sup -m/ (Archie's Law), where FF and phi represent the formation factor and porosity respectively, least squares indicate a variation of a between .5 and 2.0. The value of m varied between 1.2 to 1.7. Seismic velocities (v) decrease as porosity increases. Porosity appears to be linearly related to log v. Several samples show anomalous relationship between porosity and resistivity. Most of these samples also show anomalous seismic velocities. The majority of these samples have coarse grains or large pores. The effect of saturation on P-wave velocity is small and can be observed in few samples. In these samples, seismic velocities decrease with increase in saturation at high saturation (100% to 85%), and show a reverse relationship at low saturation. Between 15% and 85% saturation in velocity is constant.
Date: March 30, 1978
Creator: Keller, G.V.; Grose, L.T. & Pickett, G.R.
Partner: UNT Libraries Government Documents Department

Improved techniques for gasifying coal. Twelfth quarterly report, April 1, 1979-June 30, 1979

Description: In the study of high velocity fluidized beds, bed expansion of three fine group A powders is described by a modified Richardson and Zaki correlation. The two parameters in this correlation are shown to be inherently tied to the clustering behavior of fine powders. Particle properties affect bed expansion, but the main parameter is shown to be particle size distribution. The index n in the modified Richardson-Zaki correlation is thought of as a measure of segregation of the bed; being high (approx. 10) in the slugging regime and low (approx. 5) in the more homogeneous turbulent regime. Cluster size and voidage are calculated from the two parameters in the Richardson-Zaki approach and some light is thrown in the phenomenon of clustering. This aggregation of fine powders is thought to be a dynamic phenomenon, with particles quickly moving in and out of clusters. Thus the hydrodynamics of the bed can be described as somewhere between a hard sphere picture of clusters and that of a bed composed of individual particles. These cluster properties prove useful for predicting bed expansion. However, because of the dual nature of these clusters, it is believed that the effectiveness of the bed as, for example, a catalytic reactor, will not be impaired. Empirical yield correlations involving two coal properties as independent parameters were developed using the technique of step-wise regression to identify the parameter pairs that provide the best fit. These correlations of yields of the individual products are valid for the reaction conditions employed.
Date: January 1, 1979
Creator: Graff, R.A. & LaCava, A.I.
Partner: UNT Libraries Government Documents Department

Mass transfer in three-phase fluidized beds

Description: The effects of superficial liquid and gas velocity, particle diameter, liquid viscosity, and column diameter on liquid dispersion (E/sub L) and mass transfer (K/sub L/a) in three-phase fluidized beds were investigated using a water--glycerol/oxygen--nitrogen (or oxygen--argon)/glass-bead system. Overall mass transfer coefficients were calculated based on plug flow, dispersed plug flow, and continuously stirred tank models. k/sub L/a was found to increase with gas velocity and particle diameter, but no correlation of K/sub L/a with liquid velocity was observed. At low liquid velocities, K/sub L/a was lower for the more viscous liquid; the reverse was true at high liquid flow rates. E/sub L/ increased rapidly for liquid flow rates at two to three times the minimum fluidization velocity.
Date: April 26, 1978
Creator: Wu, B.W.; Cheng, Y.L.; Perini, J.R. & Roux-Buisson, J.L.
Partner: UNT Libraries Government Documents Department