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 Collection: UNT Theses and Dissertations
A Theorem on the Convergence of a Continued Fraction

A Theorem on the Convergence of a Continued Fraction

Date: 1953
Creator: Kostelec, John C.
Description: This thesis discusses a theorem on the convergence of a continued fraction.
Contributing Partner: UNT Libraries
How Computer Use Functions as an Aspect of Literacy Development : A Qualitative Description of a Second-grade Classroom

How Computer Use Functions as an Aspect of Literacy Development : A Qualitative Description of a Second-grade Classroom

Date: December 1993
Creator: Kostelnik, Joyce L.
Description: In this study, the researcher investigated how computer use functions as an aspect of literacy development within a second-grade classroom. The researcher sought to gather data to help define the role that computer use plays in the literacy development of elementary school students by concentrating on how computers are actually used in the classroom being studied, and by looking for relationships revealed by students' and teacher's beliefs about computer use in the classroom.
Contributing Partner: UNT Libraries
Adherence and Haemagglutination of Moraxella Catarrhalis.

Adherence and Haemagglutination of Moraxella Catarrhalis.

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Date: August 2000
Creator: Kosterman, Edward, III
Description: M. catarrhalis is a gram-negative diplococci frequently associated with infections of the upper respiratory tract. During the past decade, some preliminary studies have attempted to elucidate mechanisms of adherence and haemagglutination of M. catarrhalis. These studies have reported, in many cases, inconsistent results. There are two purposes of this research. First, identify mechanisms that may potentially be associated with the adherence and haemagglutination of M. catarrhalis. Second, suggest research directions that may be fruitful in clarifying these mechanisms.
Contributing Partner: UNT Libraries
Changes in Social Distance After the Inclusion of Spanish Instruction in a Fifth-grade Social Studies Unit

Changes in Social Distance After the Inclusion of Spanish Instruction in a Fifth-grade Social Studies Unit

Date: August 1971
Creator: Kostohryz, Vernon R.
Description: The problem of this study is concerned with the change in social distance to foreigners after the inclusion of Spanish language instruction in a four-week, fifth-grade social studies unit on Latin America.
Contributing Partner: UNT Libraries
Polyethylene-layered double hydroxide and montmorillonite nanocomposites: Thermal, mechanical and flame retardance properties.

Polyethylene-layered double hydroxide and montmorillonite nanocomposites: Thermal, mechanical and flame retardance properties.

Date: May 2008
Creator: Kosuri, Divya
Description: The effect of incorporation two clays; layered double hydroxides (LDH) and montmorillonite layered silicates (MLS) in linear low density polyethylene (PE) matrix was investigated. MLS and LDH were added of 5, 15, 30 and 60 weight percent in the PE and compounded using a Brabender. Ground pellets were subsequently compression molded. Dispersion of the clays was analyzed using optical microscopy, SEM and XRD. Both the layered clays were immiscible with the PE matrix and agglomerates formed with increased clay concentration. The thermal properties were studied by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). Both clays served as nucleation enhancers increasing recrystallization temperatures in the composites. Flame retarding properties were determined by using the flammability HVUL-94 system. LDH indicated better flame retarding properties than MLS for PE. The char structure was analyzed by environmental scanning electron microscopy. Mechanical properties were studied by tensile testing and Vickers microhardness testing apparatus.
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Intensive Play Therapy with Child Witnesses of Domestic Violence

Intensive Play Therapy with Child Witnesses of Domestic Violence

Date: August 1995
Creator: Kot, Sarina (Sarina Ying-Lai)
Description: This study was designed to determine the effectiveness of intensive play therapy as a method of intervention for child witnesses of domestic violence. The purpose of this study was to determine the effectiveness of intensive play therapy in: (a) improving the self-concept of child witnesses of domestic violence; (b) reducing internalizing behavior problems, such as withdrawal, somatic complaints, anxiety, and depression, of child witnesses of domestic violence; (c) reducing externalizing behavior problems, such as aggression and delinquency, of child witnesses of domestic violence; (d) reducing overall behavior problems, including internalizing and externalizing behavior problems, and social problems, thought problems, and attention problems, of child witnesses of domestic violence; and (e) improving play behaviors in the areas of affection, contact, physical proximity, self-direction, aggression, mood, play themes, and food nurturing themes.
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A Description of Sixth Grade Choir Programs: Student Grouping According to Gender and Teacher Perception of Adolescent Behavior and Vocal Physiology

A Description of Sixth Grade Choir Programs: Student Grouping According to Gender and Teacher Perception of Adolescent Behavior and Vocal Physiology

Date: May 2013
Creator: Kotara, Tammy G.
Description: The purpose of this study was to provide a description of teacher perceptions concerning behavioral and physiological vocal issues among current gender groupings in sixth-grade choir classrooms through the collection of survey research data. Participants selected for this study consisted of registered Dallas-Fort Worth metropolitan area choral directors of the Texas Music Educators Association. Results of the study indicated that more girls were enrolled in sixth-grade choir than boys and that mixed choirs were more common than gender-specific choirs in sixth grade. Results also indicated that teachers perceived evidence of early voice change among both sixth grade boys and girls, and that there was a difference in behavior as students showed signs of puberty.
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The Extent of Obsolescence of Selected Canadian Business Managers

The Extent of Obsolescence of Selected Canadian Business Managers

Date: August 1970
Creator: Kothari, Vinay B.
Description: The study's main purpose is to explore the problem of managerial obsolescence in Canada. The purpose is accomplished through establishing the importance of management techniques and concepts and through determining the managerial level of the understanding of these techniques and concepts. On the basis of the importance and understanding of management techniques and concepts, the study aims to develop an approach which would provide an approximation of the extent of management obsolescence.
Contributing Partner: UNT Libraries
Assessing Measurement Equivalence of the English and Spanish Versions on an Employee Attitude Survey Using Multigroup Analysis in Structural Equation Modeling.

Assessing Measurement Equivalence of the English and Spanish Versions on an Employee Attitude Survey Using Multigroup Analysis in Structural Equation Modeling.

Date: August 2003
Creator: Koulikov, Mikhail
Description: The study utilized the covariance structure comparison methodology - Multigroup Analysis in Structural Equation Modeling - evaluating measurement equivalence of English and Spanish versions of an employee opinion survey. The concept of measurement equivalence was defined as consisting of four components: sample equivalence, semantic equivalence, conceptual equivalence and scalar equivalence. The results revealed that the two language versions of the survey exhibited acceptable measurement equivalence across five survey dimensions Communications, Supervision, Leadership, Job Content & Satisfaction and Company Image & Commitment. Contrary to the study second hypothesis, there was no meaningful difference in opinion scores between English-speaking and Spanish-speaking respondents on the latent construct of Job Content & Satisfaction.
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Adaptive Advantages of Carotenoid Pigments in Alpine and Subalpine Copepod Responses to Polycyclic Aromatic Hydrocarbon Induced Phototoxicity

Adaptive Advantages of Carotenoid Pigments in Alpine and Subalpine Copepod Responses to Polycyclic Aromatic Hydrocarbon Induced Phototoxicity

Date: May 2010
Creator: Kovach, Matthew James
Description: Alpine zooplankton are exposed to a variety of stressors in their natural environment including ultraviolet radiation. Physiological coping mechanisms such as the accumulation of photoprotective compounds provide these zooplankton protection from many of these stressors. Elevated levels of carotenoid compounds such as astaxanthin have been shown to help zooplankton survive longer when exposed to ultraviolet radiation presumably due to the strong antioxidant properties of carotenoid compounds. This antioxidant capacity is important because it may ameliorate natural and anthropogenic stressor-induced oxidative stress. While previous researchers have shown carotenoid compounds impart increased resistance to ultraviolet radiation in populations of zooplankton, little work has focused on the toxicological implications of PAH induced phototoxicity on zooplankton containing high levels of carotenoid compounds. This thesis discusses research studying the role that carotenoid compounds play in reducing PAH induced phototoxicity. By sampling different lakes at elevations ranging from 9,500' to 12,700' in the front range of the Colorado Rocky Mountains, copepod populations containing different levels of carotenoid compounds were obtained. These populations were then challenged with fluoranthene and ultraviolet radiation. Results discussed include differences in survival and levels of lipid peroxidation among populations exhibiting different levels of carotenoid compounds, and the toxicological and ecological implications of ...
Contributing Partner: UNT Libraries