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An analysis of monojet data in p{bar p} collisions at {radical}s = 1.8 TEV

Description: An analysis is presented of events with a single jet and significant missing transverse energy selected from 4.7 pb{sup {minus}1} of data collected at the Fermilab Tevatron with the CDF detector. The goal is to identify events of the type p{bar p} {yields} Z{sup 0} + jet; Z{sup 0} {yields} {nu}{bar {nu}}. Event selection and backgrounds are discussed. The number of observed monojet events is compared to the number of observed Z{sup 0} {yields} e{sup +}{sup {minus}} events in which the Z{sup 0} … more
Date: December 31, 1992
Creator: Markeloff, R.
Partner: UNT Libraries Government Documents Department
open access

A correlation between soil descriptions and {sup 226}Ra concentrations in Florida soils

Description: The soil radium content in Florida is highly variable. The range in radium concentrations, where the samples involved in this study are concerned, is from 0.1 pCi/g to 18.5 pCi/g. Low {sup 226}Ra concentrations (0.1 to 5 pCi/g) are evidenced in sands, moderate concentrations (5 to 11 pCi/g) are found in silt and gravel, and high {sup 226}Ra concentrations (>11 pCi/g) are found in soil horizons with shell, clay, and strata with phosphate. Strata containing phosphate yields a high concentration o… more
Date: December 31, 1992
Creator: Harrison, D. P.
Partner: UNT Libraries Government Documents Department
open access

An equilibrium model for ligand-modified micellar-enhanced ultrafiltration, selective separation of metal ions using iminoacetic substituted polyamines and a theoretical model for the titration behavior of polyamines

Description: This thesis consists of three chapters. Chapter 1, An equilibrium model for ligand-modified micellar-enhanced ultrafiltration, describes a theoretical model and experimental investigations which used the semi-equilibrium-dialysis method with N-n-dodecyl iminodiacetic acid as the ligand. In Chapter 2, Selective separation of metal ions using iminoacetic substituted polyamines, polyamines with a substituted ligand group are synthesized and used in investigating selective separation of copper ions… more
Date: December 31, 1992
Creator: Dharmawardana, U. R.
Partner: UNT Libraries Government Documents Department
open access

Growth, life history, and species interactions of bluegill sunfish (Lepomis macrochirus) under heavy predation

Description: The purpose of this study was, first, to compare growth and life history characteristics of an unfished population of bluegill sunfish (Lepomis macrochirus) in the presence of an abundant predator population to characteristic exhibited by bluegills in typical southeastern US reservoirs where the abundance of predators is reduced, but fishing is increased. The second objective was to determine if differences observed between populations were determined genetically or environmentally.
Date: December 31, 1992
Creator: Belk, M. C.
Partner: UNT Libraries Government Documents Department
open access

The importance of input variables to a neural network fault-diagnostic system for nuclear power plants

Description: This thesis explores safety enhancement for nuclear power plants. Emergency response systems currently in use depend mainly on automatic systems engaging when certain parameters go beyond a pre-specified safety limit. Often times the operator has little or no opportunity to react since a fast scram signal shuts down the reactor smoothly and efficiently. These accidents are of interest to technical support personnel since examining the conditions that gave rise to these situations help determine… more
Date: December 31, 1992
Creator: Lanc, T. L.
Partner: UNT Libraries Government Documents Department
open access

A measurement of the e/{pi} ratio difference between short (250 ns) and long (2.2 {mu}s) integration times with the D0 uranium-liquid argon central calorimeter

Description: The difference of the ratios of the high energy electron and pion responses(e/{pi}) in the DO Uranium-liquid Argon central calorimeter is measured using the DO calorimeter trigger readout (short integration time: 250 ns) and precision readout (long integration time: 2.2 {mu}s). This measurement found a 5% difference in the e/{pi} ratio between short and long integration times, with estimated uncertainty of 2.3%.
Date: December 31, 1992
Creator: Pi, B.
Partner: UNT Libraries Government Documents Department
open access

A measurement of the forward-backward asymmetry and sin{sup 2}{theta}{sub W} from the process Z{sup 0} {yields} {mu}{sup +}{mu}{sup {minus}} at {radical}s = 1.8 TeV

Description: A measurement of the forward-backward charge asymmetry in the decay of Z{sup o} bosons produced from {bar p}p collisions at {radical}s = 1.8 TeV at the Fermilab Tevatron collider, and decaying to {mu}{sup +} {mu}{sup {minus}} pairs is presented. From this asymmetry, a value for the Weinburg angle, sin{sup 2} {theta}{sub W}, is extracted and compared to values from other experiments.
Date: December 31, 1992
Creator: Markosky, L. A.
Partner: UNT Libraries Government Documents Department
open access

Nonlinear self-focus of pulsed-wave beams in Kerr media

Description: A modified finite-difference time-domain method for solving Maxwell`s equations in nonlinear media is presented. This method allows for a finite response time to be incorporated in the medium, physically creating dispersion and absorption mechanisms. The technique models electromagnetic fields in two space dimensions and time and encompasses both the TE{sub z} and TM{sub z} set of decoupled field equations. Aspects of an ultra-short pulsed Gaussian beam are studied in a variety of linear and no… more
Date: December 31, 1992
Creator: Judkins, J. B.
Partner: UNT Libraries Government Documents Department
open access

Nuclear power plant status diagnostics using a neural network with dynamic node architecture

Description: This thesis is part of an ongoing project at Iowa State University to develop ANN based fault diagnostic systems to detect and classify operational transients at nuclear power plants. The project envisages the deployment of such an advisor at Iowa Electric Light and Power Company`s Duane Arnold Energy Center nuclear power plant located at Palo, IA. This advisor is expected to make status diagnosis in real time, thus providing the operators with more time for corrective measures.
Date: December 31, 1992
Creator: Basu, A.
Partner: UNT Libraries Government Documents Department
open access

The parallel implementation of a backpropagation neural network and its applicability to SPECT image reconstruction

Description: The objective of this study was to determine the feasibility of using an Artificial Neural Network (ANN), in particular a backpropagation ANN, to improve the speed and quality of the reconstruction of three-dimensional SPECT (single photon emission computed tomography) images. In addition, since the processing elements (PE)s in each layer of an ANN are independent of each other, the speed and efficiency of the neural network architecture could be better optimized by implementing the ANN on a ma… more
Date: December 31, 1992
Creator: Kerr, J. P.
Partner: UNT Libraries Government Documents Department
open access

A study of radon-222 concentrations in North Carolina groundwater

Description: The groundwater of 400 North Carolina homes was sampled to ascertain the distribution and extent of {sup 222}Rn in North Carolina groundwater. Arithmetic mean (AM) and geometric mean (GM) concentrations of 1,816 pCi L{sup {minus}1} and 656 pCi L{sup {minus}1} were found for the state. These results indicate that two-thirds of 114{degree}C. homes served by groundwater exceed the EPA proposed 300 pCi L{sup {minus}1} maximum contaminant level (MCL). Only 2% of NC homes exceeded 10,000 pCi L-1. The… more
Date: December 31, 1992
Creator: Evans, J. P.
Partner: UNT Libraries Government Documents Department
open access

A study of the ability of the D0 detector to measure the single jet inclusive cross section

Description: The D0 experiment began accumulating data at the Fermilab Tevatron in May of 1992. Protons are collided with antiprotons at {radical}s = 1.8 TeV and an expected peak luminosity of 5 {times} 10{sup 30} cm{sup {minus}2} sec{sup {minus}1}. The D0 detector is an all-purpose detector that will have exceptional jet reconstruction capabilities derived from superior calorimetry and nearly 4{pi} angular coverage. One of the many physics measurements that will be made at D0 is the inclusive jet cross sec… more
Date: December 31, 1992
Creator: Astur, R. V.
Partner: UNT Libraries Government Documents Department
open access

Use of ligand-modified micellar-enhanced ultrafiltration to selectively separate copper ions from wastewater streams

Description: The selective removal of target ions from an aqueous solution containing ions of like charge by ligand-modified micellar-enhanced ultrafiltration (LM-MEUF), is presented. In LM-MEUF, surfactant and specially tailored ligand are added to the contaminated stream. The surfactant forms aggregates called micelles, the hydrocarbon core of which the ligand complexed with the target species will solubilize. The surfactant is chosen to have the same charge type as the target ion; therefore, other ions (… more
Date: December 31, 1992
Creator: Shadizadeh, S. B.
Partner: UNT Libraries Government Documents Department
open access

Abraham Lincoln and the American Romantic Writers: Embodiment and Perpetuation of an Ideal

Description: The American Romantic writers laid a broad foundation for the historic and heroic Abraham Lincoln who has evolved as our national myth. The writers were attracted to Lincoln by his eloquent expression of the body of ideals and beliefs they shared with him, especially the ideal of individual liberty and the belief that achievement of the ideal would bring about an amelioration of the human condition. The time, place and conditions in which they lived enhanced the attraction, and Lincoln's able l… more
Date: December 1992
Creator: Hicks, Mary G. (Mary Geraldine)
Partner: UNT Libraries
open access

Alcoholism and the Family: The Destructive Forces in Hardy's Tess of the D'urbervilles

Description: This study examines the forces which shaped the main character--Tess Durbeyfield--in Hardy's novel in terms of the effects which her alcoholic family had upon her mental and emotional potential and which ultimately become the determining factors in her self-destruction. Using the elements and patterns set forth in the literature regarding the dynamics of the alcoholic family, I attempt to show that Hardy's novel may best be understood as the story of a woman whose life and destiny are controlle… more
Date: December 1992
Creator: Alexander, Elizabeth Chenoweth
Partner: UNT Libraries
open access

Alternative Funding Models for Financing Construction of Public School Facilities and Debt Retirement

Description: The main purpose of this study was to examine the various finance models that are presently being used to finance facilities and to provide information for the Texas legislature, the Texas Education Agency, and local school districts concerning facilities funding models that might be used in Texas. Based on the information gathered and analyzed, several conclusions are drawn and recommendations regarding state funding of capital projects in the State of Texas are made. The model recommended for… more
Date: December 1992
Creator: Rambo, Jack (Jack Howard)
Partner: UNT Libraries
open access

An Analysis of Factors in the Adoption or Non-Adoption of Videodisc Technology in North American Academic and Special Libraries

Description: The researcher identified 37 independent variables to study their effect on the two dependent variables, the acquisition of videodiscs and the functions for which videodisc programs were acquired. The literature of the applications of videodisc technology in libraries, museums, education and industry, as well as related issues concerning interactive video, were presented in Chapter 2. Using the diffusion of innovation theory of Everett Rogers as a guide, the researcher constructed a questionnai… more
Date: December 1992
Creator: Kelley, Robert E. (Robert Emmett)
Partner: UNT Libraries
open access

An Analysis of the Accounting System of the Quincy Mining Company: 1846-1900

Description: This historical study examines the evolution of the accounting system of the Quincy Mining Company between 1846 and 1900. The external financial reporting practices and internal accounting procedures of the firm are defined and interpreted in the context of three time periods that portray the formation, growth and maturation of the firm. Each period reflects unique economic and social conditions that are associated with changes in the firm's accounting system. A cross temporal analysis of these… more
Date: December 1992
Creator: Michael, Rodney R. (Rodney Richard)
Partner: UNT Libraries
open access

Anger and Hostility Measures: Effects of Social Desirability

Description: Individuals responding in a socially desirable (SD) fashion, rather than in a manner that reflects their true behavior, has been a problem for self-report questionnaires since their inception. The purpose of this study was to examine the hypothesis that the probability an item is endorsed on a self-report measure of anger is directly proportional to the rated SD of that item. Eighty-two subjects completed the Buss-Durkee Hostility Inventory (BDHI), the Profile of Moods State (POMS), and the Sta… more
Date: December 1992
Creator: Coffey, Scott F. (Scott Franklin)
Partner: UNT Libraries
open access

An Attributional Analysis of the Causes Cited by Junior High School Band Directors for Success and Failure at U.I.L. Concert/Sightreading Contest and Their Attitudes Towards Contest

Description: The reasons given by thirty-three junior high school band directors for success and failure at the University Interscholastic League Concert/Sightreading Contest were studied using the methodology of Attribution Theory. All of the subjects attended the same contest and were members of a region which included urban and suburban schools. The subjects responded to a questionnaire which evaluated their attitudes towards the contest, allowed them to make judgments about other directors in hypothetic… more
Date: December 1992
Creator: Williams, Richard (Richard S.), 1958-2001
Partner: UNT Libraries
open access

Beneath the Dancing Moon: A Composition for Woodwind and Percussion Ensemble

Description: The composition is scored for the following instruments: 2 flutes, 2 oboes, 2 clarinets, 2 bassoons and a large percussion section requiring 7 performers. Beneath the Dancing Moon is a programmatic piece in one movement form composed of 5 continuous sections. It depicts a night scene when the elves begin to dance beneath the moon. Later, the moaning ghosts from the dark forest and the witches with brooms come to join them. They dance furiously until the moon disappears, the sea stops dead and a… more
Date: December 1992
Creator: Pang, Law Ma Rome Anne
Partner: UNT Libraries
open access

The Canticles of Solomon

Description: The Canticles of Solomon , a musical drama written for tenor, mezzo soprano, chamber orchestra, and full chorus, is a three movement piece, 25 minutes in length. It is intended for performance without scenery, costume, or action. The fundamental element is text. The source text is The Song of Solomon from the Ryrie Study Bible. The text is cross referenced and used in the formal structure of the work. Each time a cross-referenced entry of text is reached, the melodic theme or rhythmic motive is… more
Date: December 1992
Creator: Shell, Joseph Scott
Partner: UNT Libraries
open access

Cardiorespiratory Responses to Graded Levels of Lower-body Positive Pressure During Dynamic Exercise in Man

Description: Cardiorespiratory responses to incremental dynamic exercise were assessed across four different levels of lower-body positive pressure (LBPP) and, as a separate study, during constant load (i.e constant work rate) exercise below and above each subject's ventilatory threshold (VT), both with and without 45 torr of LBPP.
Date: December 1992
Creator: Williamson, Jon W. (Jon Whitney)
Partner: UNT Libraries
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