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390,932 Matching Results

Start Over Decade 1970-1979

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(open access)

Shielding and Maintainability in an Experimental Tokamak

This paper presents the results of an attempt to develop an understanding of the various factors involved. This work was performed as a part of the task assigned to one of the expert groups on the International Tokamak Reactor (INTOR). However, the results of this investigation are believed to be generally applicable to the broad class of the next generation of experimental tokamak facilities such as ETF. The shielding penalties for requiring personnel access are quantified. This is followed by a quantitative estimate of the benefits associated with personnel access. The penalties are compared to the benefits and conclusions and recommendations are developed on resolving the issue.

Date: January 1, 1979

Creator: Abdou, M. A.; Fuller, G.; Hager, E. R. & Vogelsang, W. F.

Object Type: Article

System: The UNT Digital Library

(open access)

MACK-IV, a new version of MACK: a program to calculate nuclear response functions from data in ENDF/B format

MACK-IV calculates nuclear response functions important to the neutronics analysis of nuclear and fusion systems. A central part of the code deals with the calculation of the nuclear response function for nuclear heating more commonly known as the kerma factor. Pointwise and multigroup neutron kerma factors, individual reactions, helium, hydrogen, and tritium production response functions are calculated from any basic nuclear data library in ENDF/B format. The program processes all reactions in the energy range of 0 to 20 MeV for fissionable and nonfissionable materials. The program also calculates the gamma production cross sections and the gamma production energy matrix. A built-in computational capability permits the code to calculate the cross sections in the resolved and unresolved resonance regions from resonance parameters in ENDF/B with an option for Doppler broadening. All energy pointwise and multigroup data calculated by the code can be punched, printed and/or written on tape files. Multigroup response functions (e.g., kerma factors, reaction cross sections, gas production, atomic displacements, etc.) can be outputted in the format of MACK-ACTIVITY-Table suitable for direct use with current neutron (and photon) transport codes.

Date: July 1, 1978

Creator: Abdou, M. A.; Gohar, Y. & Wright, R. Q.

Object Type: Report

System: The UNT Digital Library

(open access)

Comparative Ultrastructural Study between Young and Adult forms of Trypanosoma Lewisi

The purpose of this study was to examine the ultrastructure of both young (dividing form) and adult (stationary form) of Trypanosoma lewisi. Changes observed between the two forms of the organism were related directly to data obtained from previous comparative biochemical studies conducted on these forms of Trypanosoma lewisi.

Date: August 1973

Creator: Abdul-Salam, Jasem M.

Object Type: Thesis or Dissertation

System: The UNT Digital Library

(open access)

A Description and Analysis of the Channels of Distribution for Food Products in the State of Kuwait

This study is intended, first, to describe and analyze the channels of distribution for food products in the State of Kuwait, second, to pinpoint the problems that exist in the food-distribution system, and, third, to make specific recommendations for the alleviation of the problems. Consistent with the objectives of the study and based on the description and analysis of the food-distribution system in the country, it is concluded in the study that Kuwait depends on imports for virtually all of its food; the government plays a major role in the food-distribution system; and the majority of food wholesaling and retailing establishments are small, inefficient, and lack modern marketing and physical distribution techniques. Product shortages and rising food prices plague the food-distribution system in the country. Also, the findings indicate that consumers in Kuwait are generally ignorant and uninformed in the areas of food nutrition and food shopping, and the lack of standardization and grading of food products makes the shopping task of the consumer more difficult.

Date: August 1977

Creator: Abdulelah, Abdulla Ali

Object Type: Thesis or Dissertation

System: The UNT Digital Library

(open access)

Heat Extraction from a Hydraulically Fractured Penny-Shaped Crack in Hot Dry Rock

Heat extraction from a penny-shaped crack having both inlet and outlet holes is investigated analytically by considering the hydraulic and thermal growth of the crack when fluid is injected at a constant flow rate. The rock mass is assumed to be infinitely extended, homogeneous, and isotropic. The equations for fluid flow are derived and solved to determine the flow pattern in the crack. Temperature distributions in both rock and fluid are also determined. The crack width change due to thermal contraction and the corresponding flow rate increase are discussed. Some numerical calculations of outlet temperature, thermal power extraction, and crack opening displacement due to thermal contraction of rocks are presented for cracks after they attain stationary states for given inlet flow rate and outlet suction pressure. The present paper is a further development of the previous works of Bodvarsson (1969), Gringarten et al. (1975), Lowell (1976), Harlow and Pracht (1972), McFarland (1975), among others, and considers the two-dimensional rather than the one-dimensional crack. Furthermore, the crack radius and width are quantities to be determined rather than given a priori. 11 refs., 1 tab., 5 figs.

Date: December 1, 1976

Creator: Abe, H.; Mura, T. & Keer, L.M.

Object Type: Article

System: The UNT Digital Library

(open access)

Measurement of N* Production in p p ---> p N* between 9-GeV/c and 300-GeV/c

The authors have measured the missing-mass spectrum of p + p {yields} p + MM in the region 1.5 < MM < 7.0 GeV using the acceleration ramp of the NAL machine between 9 and 300 GeV/c and the H{sub 2} jet target. They observe strong N*(1690) and N*(2190) production and are continuing the search for heavier mass resonances.

Date: August 1, 1973

Creator: Abe, K.; Alspector, J.; Bomberowitz, R.; Cohen, K. J.; Colleraine, A. P.; De Lillo, T. et al.

Object Type: Article

System: The UNT Digital Library

(open access)

Missing Mass Spectra from p p ---> p X from 9-GeV/c to 300-GeV/c

Missing mass spectra were obtained by measuring recoil protons from the reaction p + p {yields} p + X in the Jacobian peak region at |t| = 0.175 and 0.25 (GeV/c){sup 2}. The incident momentum range from 9 to 300 GeV/c was covered continuously by taking data during the acceleration ramp of the Fermi National Accelerator Laboratory machine. Our missing mass range varied from 1.5 to 8.5 GeV and we observed the well known N*(1688) and N*(2l90) but no significant structures at higher mass.

Date: June 1, 1974

Creator: Abe, K.; Alspector, J.; Bomberowitz, R.; Cohen, K.J.; De Lillo, T.; Harrison, W.C. et al.

Object Type: Article

System: The UNT Digital Library

(open access)

Measurement of p p --> p x Between 50-GeV and 400-GeV

The authors present measurements of the invariant cross section for the inclusive reaction p + p {yields} p + X in the region 0.14 < |t| < 0.38 GeV{sup 2}, 100 < s < 750 GeV{sup 2} and 0.07 < M{sub x/s}{sup 2} < 0.20.

Date: September 1, 1973

Creator: Abe, K.; De Lillo, T.; Robinson, B.; Sannes, F.; /Rutgers U., Piscataway; Carr, J. et al.

Object Type: Article

System: The UNT Digital Library

(open access)

Influence of access hole parameters on neutron moisture probe readings

Computing soil moisture content with a neutron probe requires use of a calibration curve that considers the thermal neutron capture cross section of the hole liner, as well as the hole diameter. The influence of steel, polyvinyl chloride, and aluminum casings that fit 0.051- to 0.102-m hole diameters was determined by comparison with neutron probe readings in uncased holes of corresponding diameters. Eccentricity of probe location was considered a potentially significant variable. The experiment was run in disturbed Bandelier tuff with an average dry density of 1.35g . cm/sup -3/ and moisture content of 3.8 to 26.7% by volume. The casing material and hole diameter influenced the probe readings significantly, whereas eccentric location of the probe did not. Regression analyses showed an almost perfect inverse linear correlation between hole diameter and count rate.

Date: October 1, 1979

Creator: Abeele, W.V.

Object Type: Report

System: The UNT Digital Library

(open access)

Influence of access hole parameters on neutron moisture probe readings

Computing soil moisture content with a neutron probe requires use of a calibration curve that considers the thermal neutron capture cross section of the hole liner as well as the hole diameter. The influence of steel, polyvinyl chloride, and aluminum casings that fit 0.051 to 0.102-hole diameters was determined by comparison with neutron probe readings in uncased holes of corresponding diameters. Eccentricity of probe location was considered a potentially significant variable. The relationship between hole diameter and count rate also was investigated. The experiment was run in disturbed Bandelier tuff with an average dry density of 1.2 g . cm/sup -3/ and moisture content of 1.3 to 35.5% by volume. The casing material and hole diameter influenced the probe readings significantly, whereas eccentric location of the probe did not. Regression analyses showed an almost perfect inverse linear correlation between hole diameter and count rate.

Date: April 1978

Creator: Abeele, Willy V.

Object Type: Report

System: The UNT Digital Library

(open access)

Federalism and Political Problems in Nigeria

The purpose of this thesis is to examine and re-evaluate the questions involved in federalism and political problems in Nigeria. The strategy adopted in this study is historical, The study examines past, recent, and current literature on federalism and political problems in Nigeria. Basically, the first two chapters outline the historical background and basis of Nigerian federalism and political problems. Chapters three and four consider the evolution of federalism, political problems, prospects of federalism, self-government, and attainment of complete independence on October 1, 1960. Chapters five and six deal with the activities of many groups, crises, military coups, and civil war. The conclusions and recommendations candidly argue that a decentralized federal system remains the safest way for keeping Nigeria together stably.

Date: August 1975

Creator: Abegunrin, Olayiwola

Object Type: Thesis or Dissertation

System: The UNT Digital Library

(open access)

Nondestructive methods for the acceptance of plating thickness on printed circuit boards

None

Date: October 31, 1974

Creator: Abel, A. B.

Object Type: Report

System: The UNT Digital Library

(open access)

Speciation studies of radionuclides in low level wastes and process waters from pressurized water reactor

Physicochemical characterization studies of aqueous process streams at San Onofre Generating Station Unit No. 1 are providing important source term information concerning the forms of radionuclides being released into the marine environment. The primary coolant, secondary steam condensate, processed low level wastes and tertiary coolant were sampled at several different times in the nuclear fuel cycle. Rdionuclides were partitioned into particulate, cationic, anionic, and nonionic species in the reactor process streams, and into particulate and soluble species in the tertiary seawater coolant. Characterization of the particulate species has included a detailed size distribution. The purpose of this research was to provide information concerning chemical and physical forms of the radionuclides being released to the coastal zone from a nuclear generating station in order to facilitate design of radiobiological studies necessary for assessment of their environmental significance.

Date: October 1, 1977

Creator: Abel, K. H.; Robertson, D. E.; Crecelius, E. A. & Silker, W. B.

Object Type: Article

System: The UNT Digital Library

(open access)

MAXIMUM HUMIDITY INDICATOR

Moisture-sensitive systems to measure and indicate the maximum level of humidity exposure are discussed. A chemical indicator utilizing deliquescent salts and water-soluble dyes provides an irreversible color change at discrete levels of relative humidity. To provide indication of the time at which the exposure occurs, a circuit employing a resistive-type sensor was developed. A small, commercially available sensor is used in a portable probe to detect humidity leaks into controlled areas.

Date: October 1, 1974

Creator: Abel, W B

Object Type: Text

System: The UNT Digital Library

(open access)

Beta Backscatter Measurement of Aluminum Coatings on Mylar Substrates

A series of experiments was performed to determine the relative beta backscatter obtained from aluminum and from mylar. These experimental values were then compared with calculated values of relative backscatter.

Date: September 1, 1974

Creator: Abel, W. B. & Heckman, R. V.

Object Type: Report

System: The UNT Digital Library

(open access)

Chemical maximum humidity indicator update report. Topical report

Raw materials and manufactured parts sometimes must be kept in a controlled-humidity environment. The use of moisture-sensitive systems to indicate the maximum level of humidity exposure is discussed. A chemical indicator made from deliquescent salts and water-soluble dyes provides an irreversible color change at discrete levels of relative humidity. The performance and long-term-stability characteristics of the indicator are described.

Date: November 1, 1978

Creator: Abel, W.B.

Object Type: Report

System: The UNT Digital Library

(open access)

Electrical compensation system for plated-through-hole tester. Milestone report

A microprocessor system has been developed to control the acquisition and interpretation of resistance-measurement data from plated-through holes in printed wiring boards. The system provides a direct digital display of the thickness of the copper plating on the hole walls. The complex calibration for holes having different geometries is stored in the memory of the system, and the geometry factors are input through thumbwheel switches. A special probe system makes possible the determination of an average resistance value for each test hole without moving the probe contacts in relation to the hole.

Date: October 1, 1978

Creator: Abel, W.B.

Object Type: Report

System: The UNT Digital Library

(open access)

The Citizens Journal (Atlanta, Tex.), Ed. 1 Thursday, March 29, 1979

Weekly newspaper from Atlanta, Texas that includes local, state and national news along with extensive advertising.

Date: March 29, 1979

Creator: Abeles, Neil

Object Type: Newspaper

System: The Portal to Texas History

(open access)

The Citizens Journal (Atlanta, Tex.), Ed. 1 Thursday, November 2, 1978

Weekly newspaper from Atlanta, Texas that includes local, state and national news along with extensive advertising.

Date: November 2, 1978

Creator: Abeles, Neil

Object Type: Newspaper

System: The Portal to Texas History

(open access)

[Trains Magazine Back Cover]

Clipping of the back cover of Trains Magazine. There is a photo of T&P train #610 on the tracks. The Caption reads "En route to the site of The Great Dynamometer Test, Southern's ex-Texas & Pacific 2-10-4 is eased down 2.1 per cent toward Old Fort, N. C., by Engineer Frank Clodfelter. The Texas type, only survivor of original Lima Super-Power design, was working an Asheville-Salisbury excursion on July 29, 1977, when photographed near Andrews Geyser." Written underneath the clipping is "-Trains Feb. 1978 rear cover."

Date: July 29, 1977

Creator: Abernathy, Robert E.

Object Type: Clipping

System: The Portal to Texas History

(open access)

Observations & Reflections on Texas Folklore

Collection of popular folklore of Texas, including stories about hunting, warfare, religion, Texas traditions, and other miscellaneous folk tales. The index begins on page 149.

Date: 1972

Creator: Abernethy, Francis Edward

Object Type: Book

System: The UNT Digital Library

(open access)

Paisanos: A Folklore Miscellany

Collection of Texas and Mexican folklore, including "folk tales, folklore in journalism, reflections on the lore of the past, and some analyses of folklore generally" (inside of the front cover).

Date: 1978

Creator: Abernethy, Francis Edward

Object Type: Book

System: The UNT Digital Library

(open access)

Some Still Do: Essays on Texas Customs

Collection of essays about Texas folklore and customs, including information about cooking, woodworking, farming, festivals, folk music and other Texas folklore. The index begins on page 151.

Date: 1975

Creator: Abernethy, Francis Edward

Object Type: Book

System: The UNT Digital Library

(open access)

What's Going On? (In Modern Texas Folklore)

Volume of "a collection of essays by contemporary folklorists who are writing about the customs and traditions and the songs and the stories that are going on now" (inside the front cover). It includes information about the folklore of cowboys, rodeos, chain letters and marijuana, as well as information about country, swing and gospel music. Index begins on page 301.

Date: 1976

Creator: Abernethy, Francis Edward

Object Type: Book

System: The UNT Digital Library

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