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An Investigation into the Stability of Students' Timbre Preferences from the Sixth through the Tenth Grade

An Investigation into the Stability of Students' Timbre Preferences from the Sixth through the Tenth Grade

Date: May 1995
Creator: May, Brack M. (Brack Miles)
Description: The purpose of the study was to determine whether students' timbre preferences in the sixth grade remain stable through the tenth grade. The investigation also examined whether gender, band instruction, or musical home environment makes any difference in influencing the stability of students' timbre preferences from grade six through ten. Students' timbre preferences at the beginning of the study were compared to their preferences four years later. The students' timbre preferences were obtained by employing Gordon's Instrument Timbre Preference Test (ITPT). A questionnaire was also utilized at the conclusion of the study to determine which students had musical home environments and which did not. All sixth grade students enrolled in a single school district took the ITPT. Each student's scores were tallied and ranked in order to determine their timbre preferences; four years later they were retested and their scores were ranked again.
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An Investigation of Algae and Common Tastes and Odors in Fresh Water

An Investigation of Algae and Common Tastes and Odors in Fresh Water

Date: 1956
Creator: Harmon, John C.
Description: The purpose of this investigation was to isolate and grow algae common to the southwest in unialgal culture; to either sustain or grow one of the principal bloom-causing organisms, with emphasis on Microcystis aeruginosa; to isolate and culture actinomycetes from the same waters from which the algae were obtained; and to inoculate these algae with actinomycetes and determine their effects through development and deterioration.
Contributing Partner: UNT Libraries
Investigation of an Investment Casting Method Combined with Additive Manufacturing Methods for Manufacturing Lattice Structures

Investigation of an Investment Casting Method Combined with Additive Manufacturing Methods for Manufacturing Lattice Structures

Date: August 2013
Creator: Kodira, Ganapathy D.
Description: Cellular metals exhibit combinations of mechanical, thermal and acoustic properties that provide opportunities for various implementations and applications; light weight aerospace and automobile structures, impact and noise absorption, heat dissipation, and heat exchange. Engineered cell topologies enable one to control mechanical, thermal, and acoustic properties of the gross cell structures. A possible way to manufacture complex 3D metallic cellular solids for mass production with a relatively low cost, the investment casting (IC) method may be used by combining the rapid prototyping (RP) of wax or injection molding. In spite of its potential to produce mass products of various 3D cellular metals, the method is known to have significant casting porosity as a consequence of the complex cellular topology which makes continuous fluid's access to the solidification interface difficult. The effects of temperature on the viscosity of the fluids were studied. A comparative cost analysis between AM-IC and additive manufacturing methods is carried out. In order to manufacture 3D cellular metals with various topologies for multi-functional applications, the casting porosity should be resolved. In this study, the relations between casting porosity and processing conditions of molten metals while interconnecting with complex cellular geometries are investigated. Temperature, and pressure conditions on the ...
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An investigation of beliefs and practices of conservative Protestant parents and the cultural applicability of child parent relationship therapy.

An investigation of beliefs and practices of conservative Protestant parents and the cultural applicability of child parent relationship therapy.

Date: May 2007
Creator: McClung, Tracy M.
Description: The purpose of this study was to conduct a survey to identify the beliefs and practices of conservative Protestant parents, which assisted in clarifying the assertions in the current literature regarding conservative Protestant parenting. Additionally, this researcher sought to determine the applicability of child parent relationship therapy (CPRT), a filial therapy model based upon the principles of child centered play therapy, for conservative Protestant parents by ascertaining the need for cultural modifications. Beliefs and practices of conservative Protestants were measured using the Protestant Parenting Inventory (PPI), an original instrument developed through a series of focus groups and pilot testings. The population comprised 148 mothers and fathers from 4 Southern Baptist churches in and around the Dallas/Fort Worth metroplex. Exploratory factor analysis was applied to the data in order to increase internal consistency estimates and percent of explained variance. Criterion coding of demographic data allowed a multiple regression analysis to determine which demographic variables were significant predictors of participant responses on the PPI. Descriptive statistics allowed the researcher to investigate the compatibility of conservative Protestants and CPRT. Results of this study both confirm and refute past findings regarding conservative Protestants. Results also revealed the need for some cultural modifications to CPRT ...
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Investigation of Certain Accident Data to Determine if It Follows a Poisson Distribution and the Extent to Which It Does

Investigation of Certain Accident Data to Determine if It Follows a Poisson Distribution and the Extent to Which It Does

Date: August 1969
Creator: Clark, Carl D.
Description: The purpose of this study was to investigate the medical records of 900 maintenance personnel employed in an aircraft manufacturing plant, and determine if the accident rate followed a Poisson distribution as well as the extent to which it did. It was assumed that the closer the data conformed to the Poisson curve, the more likely it would be that the variance in accident rates was due to "pure chance factors." The investigation of data in this study was expected to reveal information concerning the relative importance of the various injury sources, the conditions, processes or activities that produce injuries, extent of recurrence of each kind of injury or accident in each type of activity or operation, repeaters, which could be utilized in preventing recurrence.
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An Investigation of Certain Components of Ego-Strength to Distinguish Vocationally Rehabilitable and Non-Rehabilitable Workers

An Investigation of Certain Components of Ego-Strength to Distinguish Vocationally Rehabilitable and Non-Rehabilitable Workers

Date: June 1965
Creator: Solomos, Leo Fred
Description: It was the intent of this study to investigate the relationship of the concept of ego-strength to the success in vocational rehabilitation. Specifically, the study was designed to evaluate in detail certain components of ego-strength which might be significant in distinguishing between the successful and unsuccessful disabled workers referred to Goodwill Industries of Dallas for vocational diagnosis and training.
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An Investigation of Certain Factors Related to Self-Concept, Sexual Knowledge, and Attitude toward Sex Education of a Group of Elementary Teachers

An Investigation of Certain Factors Related to Self-Concept, Sexual Knowledge, and Attitude toward Sex Education of a Group of Elementary Teachers

Date: June 1970
Creator: Hobbs, George W. (George William), 1932-
Description: The problem of this study was to determine the relationship between self-concept, expressed sexual knowledge, and attitude toward sex education of a group of experienced elementary teachers. A second dimension of the problem was to investigate the relationship of the three variables above with certain other factors that could possibly influence the effectiveness of the elementary teacher of sex education. These factors were age of the teacher, sex of the teacher ,grade level of teaching, educational level of the teacher, teaching experience, marital status of the teacher, number of siblings of the teacher, and church preference or affiliation of the teacher.
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An Investigation of Chloral Hydrate as an Inhibitor of Bacterial Spreader Colonies in Milk Plate Counts

An Investigation of Chloral Hydrate as an Inhibitor of Bacterial Spreader Colonies in Milk Plate Counts

Date: 1951
Creator: Gochnour, Runnald Wallace
Description: This study has consisted primarily of the addition of varying amounts of chloral hydrate to nutrient agar plates and the determination of the definite effects thereof upon the colony plate counts of various samples of milk.
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Investigation of Computer Crimes

Investigation of Computer Crimes

Access: Use of this item is restricted to the UNT Community.
Date: August 2002
Creator: Erdonmez, Erhan
Description: In this study, the development of the computer related crime will be examined in the first chapter. After a detailed introduction to computer crimes, the most common types of the computer crimes will be examined and the characteristics of the offenders and their motivates will be identified. The general investigation process of the computer crime investigation will be outlined in the second chapter. After attempting to define computer crime, computer criminals and investigation process, a case study related to the topic will be examined and the characteristics and the motives of the criminals will be identified. In the last chapter the response by law enforcement officers to high technology crime will be discussed.
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Investigation of Copper Out-Plating Mechanism on Silicon Wafer Surface

Investigation of Copper Out-Plating Mechanism on Silicon Wafer Surface

Date: August 1995
Creator: Chien, Hsu-Yueh
Description: As the miniaturization keeps decreasing in semiconductor device fabrication, metal contamination on silicon surfaces becomes critical. An investigation of the fundamental mechanism of metal contamination process on silicon surface is therefore important. Kinetics and thermodynamics of the copper out-plating process on silicon surfaces in diluted HF solutions are both evaluated by several analytical methods.
Contributing Partner: UNT Libraries