UNT Theses and Dissertations - 20,719 Matching Results

Search Results

prev Results: 10225 - 10248 next
open access

Automated Real-time Objects Detection in Colonoscopy Videos for Quality Measurements

Description: The effectiveness of colonoscopy depends on the quality of the inspection of the colon. There was no automated measurement method to evaluate the quality of the inspection. This thesis addresses this issue by investigating an automated post-procedure quality measurement technique and proposing a novel approach automatically deciding a percentage of stool areas in images of digitized colonoscopy video files. It involves the classification of image pixels based on their color features using a new… more
Date: August 2013
Creator: Kumara, Muthukudage Jayantha
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Effects of Hypoxia Responses during Moderate- and Severe-Intensity Exercise Performed to Exhaustion

Description: The purpose of the study was to investigate the effects of hypoxia responses during moderate- and severe-intensity exercise performed to exhaustion. Nine healthy university students, five men, and four women (mean ± SD, age, 23 ± 1 y; height 167 ± 8 cm; weight 73 ± 7 kg) performed a cycle ergometer test in normoxia and hypoxia conditions. Cardiorespiratory, metabolic, and perceptual responses were measured during moderate-intensity and during severe-intensity exercise. During moderate-intensity… more
Date: May 2023
Creator: Kumawat, Mandeepa Mohanlal
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

"They Have Gone From Sherman": The Courthouse Riot of 1930 and Its Impact on the Black Professional Class

Description: This study describes the development of the black business and professional community with emphasis on the period from 1920 to 1930, the riot itself, and the impact of the episode on the local black community. It utilizes traditional historical research methods, county records, contemporary newspapers, and oral history.
Date: December 1995
Creator: Kumler, Donna J.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

A New Approach for Transition Metal Free Magnetic Sic: Defect Induced Magnetism After Self-ion Implantation

Description: SiC has become an attractive wide bandgap semiconductor due to its unique physical and electronic properties and is widely used in high temperature, high frequency, high power and radiation resistant applications. SiC has been used as an alternative to Si in harsh environments such as in the oil industry, nuclear power systems, aeronautical, and space applications. SiC is also known for its polytypism and among them 3C-SiC, 4H-SiC and 6H-SiC are the most common polytypes used for research purpo… more
Date: May 2013
Creator: Kummari, Venkata Chandra Sekhar
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

A Comparison of the Higher Education Systems of Taiwan, Singapore, and Hong Kong as a Model for Developing Nations, 1945-1980

Description: The purposes of this study were to (a) examine higher education activities from 1945 to 1980 before Taiwan, Singapore, and Hong Kong became newly industrialized countries; (b) study the higher education reforms that each country made in its progress in order to meet the challenge; (c) compare and contrast the higher education systems that were adopted; and (d) identify a single Asian higher education system model (descriptive model) for any country that desires to become an industrialized count… more
Date: August 1996
Creator: Kumnuch, Em-Amorn
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

The Colonial Subject in the Early British Novel: Revisiting Colonial Captivity in "Robinson Crusoe"

Description: Scholars today deem Robinson Crusoe the first British novel. Defoe's construction of Crusoe as the atypical British traveler asserts his collective subjectivity within the framework of intimate personal experiences, accentuating his individualism. Yet, as scholars of Orientalism and Transatlantic theory can attest, calling Robinson Crusoe the first novel provides problematic methodologies that arise from affiliating the novel form to a structure associated the British colonialism and fashioning… more
Date: May 2023
Creator: Kunasek, Caleb John
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Correlates of Depression in Elderly Asians in the United States

Description: The primary purpose of this study was to examine the correlation between depression and the personal characteristics of Asians who are 50 years or older. The secondary objective was to determine whether Asians 50 years or older living in the United States are more likely to be depressed than other ethnicities. The information for this study was secured from the National Health Interview Survey, spanning the years 2001 to 2010. In this study, I utilized the SAS-Callable SUDAAN statistical syst… more
Date: December 2013
Creator: Kung, Kevin Hsiang-Hsing
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

NAD+-Dependent 15-Hydroxyprostaglandin Dehydrogenase from Swine Kidney: Characterization and Kinetic Mechanism

Description: Cytoplasmic 15-hydroxyprostaglandin dehydrogenase from swine kidney was purified to specific activity of 1.2 U per mg protein, by chromatographic techniques. Native molecular weight of enzyme was estimated at 45,000. Enzyme was inhibited by sulfhydryls, diuretics, and various fatty acids. Substrate studies indicated NAD+ specificity and ability to catabolize prostaglandins, except prostaglandin B and thromboxane B. Initial velocity studies gave intersecting plots conforming to a sequential mec… more
Date: December 1979
Creator: Kung-Chao, Diana T.-Y.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Twin oaks: A Comic Opera in One Act

Description: Twin Oaks: A Comic Opera in One Act is a chamber opera approximately 60 minutes in length. Its accompanying ensemble is scored for flute (doubling piccolo), oboe (doubling English horn), B-flat clarinet, bass clarinet, bassoon, trumpet (in C and B-flat), F horn, percussion, piano, 2 violins, viola, violoncello and double bass. It is a Number Opera with 10 numbers. There is a single case in which there is music played under the dialogue. The text is based off the W.S. Gilbert Play: Eyes and No E… more
Date: August 1995
Creator: Kuniyasu, Kurt Kazuo, 1958-
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Can Positive Reinforcement Overcome Fear? An Investigation of Competing Contingencies

Description: Escape maintained behavior in dogs is generally displayed by one of two behaviors-fleeing or aggression. Once aggression is negatively reinforced by the removal of the aversive stimulus, it is very difficult to eliminate from the organism's repertoire. Counterconditioning is the process of pairing a positive reinforcer with an aversive stimulus in the attempts that an organism will no longer exhibit fear responses in its presence. This process must be done gradually with small approximations. M… more
Date: August 2011
Creator: Kunkel, Rebecca Ann
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

The Status of the Rural School Child in the City High School

Description: The purpose of this study is to see whether the shifting of great numbers of agricultural folk to the city high school really creates a serious problem for the adminstrators and teachers of the city high schools. The records of the 477 rural transfers of the tenth and eleventh grades of these six high schools were investigated.
Date: August 1937
Creator: Kunkel, Robert F.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Factors of Depression in the Elderly: Assessment and Implications for Diagnosis

Description: The problem of assessment and diagnosis of depression in the elderly begins with the definition of depression being indefinite. In this study, the theory of learned helplessness was chosen because of its value in organizing research within a learning theory framework. The Beck Depression Inventory, measures of fluid and crystallized intellectual ability, locus of control, and attribution of success and failure were chosen as variables for an exploratory factor analysis. The purpose of selecting… more
Date: December 1987
Creator: Kunsak, Nancy Elizabeth
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Prohibition in Symbol Communication

Description: Literature in semiotics lacks consideration of the elements in symbols that communicate specific concepts. Prohibition was the concept chosen for study. Potential prohibitors were represented by line configurations superimposed on background symbols. Seven prohibitors coupled with symbol backgrounds to form 49 experimental symbols were studied through a symbol inventory. Prohibitors constituted the independent variable, while dependent variables were verbal responses by 105 college students to … more
Date: May 1983
Creator: Kunsak, Nancy Elizabeth
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Machine Learning in Computational Chemistry

Description: Machine learning and artificial intelligence are increasingly becoming mainstream in our daily lives, from smart algorithms that recognize us online to cars that can drive themselves. In this defense, the intersection of machine learning and computational chemistry are applied to the generation of new PFAS molecules that are less toxic than those currently used today without sacrificing the unique properties that make them desirable for industrial use. Additionally, machine learning is used t… more
This item is restricted from view until June 1, 2024.
Date: May 2022
Creator: Kuntz, David Micah
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Electrical and Structure Properties of High-κ Barium Tantalite and Aluminum Oxide Interface with Zinc Oxide for Applications in Transparent Thin Film Transistors

Description: ZnO has generated interest for flexible electronics/optoelectronic applications including transparent thin film transistors (TFTs). For this application, low temperature processes that simultaneously yield good electrical conductivity and optical transparency and that are compatible with flexible substrates such as plastic, are of paramount significance. Further, gate oxides are a critical component of TFTs, and must exhibit low leakage currents and self-healing breakdown in order to ensure opt… more
Date: August 2011
Creator: Kuo, Fang-Ling
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Crystallization and Lithium Ion Diffusion Mechanism in the Lithium-Aluminum-Germanium-Phosphate Glass-Ceramic Solid Electrolytes

Description: NASCION-type lithium-aluminum-germanium-phosphate (LAGP) glass-ceramic is one of the most promising solid electrolyte (SEs) material for the next generation Li-ion battery. Based on the crystallization of glass-ceramic material, the two-step heat treatment was designed to control the crystallization of Li-ion conducting crystal in the glass matrix. The results show that the LAGP crystal is preferred to internally crystalize, Tg + 60%∆T is the nucleation temperature that provides the highest ion… more
Date: May 2021
Creator: Kuo, Po Hsuen
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Behavior Patterns among Children with a History of Metopic Synostosis

Description: Metopic synostosis is a condition in which the metopic suture of the human cranium fuses prematurely and may be related to poor behavioral inhibition leading to behaviors commonly associated with Attention-Deficit Hyperactivity Disorder (ADHD). The purpose of this project was to examine the behavior patterns among children with a history of metopic synostosis. It was hypothesized that children with a history of metopic synostosis would exhibit many of the same behavioral patterns associated wit… more
Date: August 2000
Creator: Kuper, Bradley D.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Devotio Moderna and Erasmus: Transforming Piety

Description: The relationship between Erasmus of Rotterdam and the religious movement called the Devotio Moderna, especially the latter's relevance to Erasmian piety, has been a somewhat contentious historiographical issue. This thesis examines that relationship, and asserts that the Devotio Moderna was a crucial formative aspect of Erasmus' religiosity. However, its relevance ought not be overstated, due to the humanist's significant developments away from his spiritual forerunners.
Date: July 2023
Creator: Kuplack, Ian
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Regulation and Political Costs in the Oil and Gas Industry: An Investigation of Discretion in Reporting Earnings and Oil and Gas Reserves Estimates

Description: This study investigates the use of discretion by oil and gas companies in reporting financial performance and oil and gas reserve estimates during times of high political scrutiny resulting from increases in energy prices. Hypotheses tested in prior literature state that companies facing the risk of increasing taxes or new regulations reduce reported earnings to reduce this risk. This study uses a measure of high profitability (rank order of return on assets relative to industry peers) to ident… more
Date: August 2010
Creator: Kurdi, Ammr
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Adolescent Task Management: Multitasking and Social Media in the Student Search Process

Description: This study examines adolescent students at an American international school and observes student use of social networking programs as well as physical actions in the search process. The study specifically observed multitasking behavior and organizational skills among students, as well as linkages made through social networking sites. Student observations, student interviews, analysis of Facebook entries, and a survey on multitasking yielded rich data. Students appear to be far more organized … more
Date: August 2013
Creator: Kurtenbach, John
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Personality Enhancement and the Summer Camp Experience

Description: The study was undertaken to discover if the summer camp experience enhanced personality traits of participants in the camp program. The study was implemented at Greene Family Camp in Bruceville, Texas, during the summer of 1985. Utilized were analyses of variance and two types of factor analyses: principal-components analysis with varimax rotation and principal axis factoring with oblique rotation of factor matrices elicited. Five personality areas were analyzed--sociability, independence, achi… more
Date: August 1987
Creator: Kurtz, G. Brian (Gerald Brian)
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Association of Masculinity Scores with Five Measures of Adjustment at the Gainesville State School for Delinquent Youths

Description: The problem with which this investigation is concerned is that of determining the effects of masculinity on achievement. The California Psychological Inventory Fe Scale is used to measure masculinity. Results from this scale are compared with results on five measures of adjustment; Wechsler I.Q. scores, the Gainesville State School point system, and three scales constructed for this study to measure aspects of adjustment. The findings of this study fail to support the proposition that masculini… more
Date: May 1977
Creator: Kurtz, Howard A.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

The Effects of Victimization on the Acceptance of Aggression and the Expectations of Assertive Traits in Children as Measured by the General Social Survey

Description: The problem with which this investigation is concerned is that of determining the effects significant symbolic interactions such as victimization, have on the acceptance of aggression and the expectation of assertive traits in children. Information from the General Social Survey (years 1973, 1975, 1976, and 1978) is used to establish measures of victimization, acceptance of aggression, and expectations of assertive traits in children. The findings provide only slight support for a model which p… more
Date: August 1982
Creator: Kurtz, Howard A.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
Back to Top of Screen