Search Results

CDMA Network Design

Description: This presentation gives an overview of code-division multiple access (CDMA) and inter-cell effects, network capacities, sensitivity analysis of base station locations, pilot-signal power, and transmission power of the mobiles, and concludes with numerical results.
Date: May 2002
Creator: Akl, Robert G.
Partner: UNT College of Engineering

Texas Public School Principals' Application of Procedures in Identification and Prevention of Sexual Harassment

Description: The procedural survey on sexual harassment procedures sent to 300 Texas principals had a response rate of 48.3 %. The mean score on the procedural survey for all 300 principals was 69.30 %. Eighteen research questions were addressed in detail in Chapter 4. Only five showed a significant correlation or effect size. Question 5 asked if there was a correlation between gender and the mean score of the survey instrument regarding sexual harassment procedures. The mean score of women was significantly higher than men. Question 6 asked if there was a correlation between the number of students in a school and the mean score of the survey instrument regarding sexual harassment procedures. This revealed that a significant correlation appeared between principals who worked at larger schools. Question 10 asked if there was a correlation between the location of the school, whether rural, urban, or metroplex and the mean score of the survey instrument. Principals of urban and metroplex schools scored significantly higher. Question 13 asked if there was a correlation between the hours of sexual harassment training attended in the last year and the mean score of the survey instrument regarding sexual harassment procedures. The results of this analysis revealed that a correlation approaching a medium effect size of .237 was present. Question 18 asked if there was a correlation between the total number of hours a principal had attended training and the mean score of the survey instrument. Neither the Pearson's correlation or the Spearman's rho was statistically significant. However, due to the large variation in responses on the sum of hours of training about sexual harassment, it was suspected that there might be a covariate accounting for sub-populations within the principals who participated in the survey. For ages 30-43.5, as the number of total training hours increased, the ...
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Date: May 2002
Creator: Cramer, Conita K. Markel
Partner: UNT Libraries

Fluorination Effect on the Conformational Properties of Alkanes

Description: A Series of fluorophores of the general formular P(CF2)nP and P(CF2)n-1CF3 has been synthesized. Copper catalyzed coupling of 1-bromopyrene and the corresponding mono and di-iodoperfluoroalkanes were used in most cases. For the n=3 dimer, a novel 1,w-perfluoroalkylation of pyrene via bis-decarboxylation of hexafluorogultaric acid was utilized. These compounds, along with suitable hydrocarbon analogs, are being used to study the flexibility of fluorocarbon chains using emission. We have found that the excimer formation for the fluorinated pyrene monomers is highly dependent on concentration and is less efficient than for pyene. Excimer formation for the fluorinated pyrene dimers is much more efficient than for the fluorocarbon monomers and is only slightly concentraion dependent. Steady-state emission spectra indicate hydrocarbon dimers-models form excimers more efficiently than the fluorinated dimers suggesting the fluorinated chains are stiffer than the hydrocarbons. We conducted the temperature-dependent studies and quantified the conformational difference.
Date: May 2002
Creator: Xu, Wenjian
Partner: UNT Libraries

The Characteristics of Sociological Practitioners: A Social Psychological Examination

Description: Questionnaires were sent by mail and e-mail to 143 members of the Sociological Practice Association. The purpose of the questionnaire was to measure the role expectations as qualities (competencies), role expectations as actions, and role enactments of the respondents'. An additional goal was to examine how respondents perceived their work to be sociological in nature, and how they saw their work as different from the practices of social workers, counselors, and psychologists. The first question that was addressed was, “Do sociological practitioners have clear and unambiguous role expectations for their work as practitioners?” The data showed that most role expectations measured as competencies were clear and unambiguous, and only a few were ambiguous and unclear. The second question addressed was, “Do sociological practitioners perceive their role enactments to differ from other helping professionals such as social workers, counselors, and psychologists?” The data showed that sociological practitioners do perceive their role enactments to be different because of their use of sociological theory and their focus on social structures. The final question asked was, “How do sociological practitioners perceive their work as sociological in theory, methods, or both?” The data showed that sociological practitioners perceive their work as sociological based on their use of sociological theory. Most respondents reported that they used common scientific methods, and few reported the use of psychological theory.
Date: May 2002
Creator: Carr, Joel Lance
Partner: UNT Libraries

Use of the Beck Depression Inventory in Northern Brazil

Description: The Beck Depression Inventory (BDI) is a popular screening and research instrument for measuring severity of depression. The instrument was translated to Portuguese for use in Brazil in 1979; however, it was not until recently that its psychometric properties have been tested empirically for the Brazilian population. The purpose of the present study was to explore the BDI's psychometric properties in a northern region of Brazil and to test for possible relationships between certain demographic variables and BDI outcomes. Samples used in this study were from an urban area in Roraima, the northernmost state of Brazil. The BDI showed adequate levels of internal consistency in nonclinical and clinical samples. Female respondents had significantly higher scores than male respondents. Those who had lower levels of education, income, or occupational status had significantly higher scores than those with higher levels of these variables. Adolescents had significantly higher scores than adults from all age groups except those from age 19 to 22. No significant difference was found between those who identified themselves as “indigenous” and those who identified themselves as “non-indigenous.” Regression analysis results showed that the combination of gender, education, and age best accounted for the variance in BDI scores. An ANCOVA revealed that clinically depressed adults had significantly higher BDI scores than nonclinically depressed adults. Factor analysis results showed that there were two main factors in the item structure for both female respondents and male and female respondents combined: one factor of mainly cognitive-affective items and the other factor of mainly somatic items. The results were discussed in terms of the future use of the BDI in Brazil.
Date: May 2002
Creator: Albert, Christopher
Partner: UNT Libraries

The Construct Validity of Self-Reported Historical Physical Activity

Description: The purpose of this study was to determine the construct validity of self-reported historical walking, running, and jogging (WRJ) activity. The criterion measure was concurrent performance on a maximal treadmill test. Subjects completed a medical exam and treadmill test between the years 1976 and 1985, and completed a follow-up questionnaire in 1986. Questionnaire included an item that assessed WRJ for each year from 1976 through 1985. Data analysis included Spearman correlations, partial correlations, ANOVA, and ANCOVA. Results indicated self-reported historical WRJ can be assessed with reasonable validity when compared with concurrently measured treadmill performance, and there is no decay in the accuracy of this reporting for up to ten years in the past.
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Date: May 2002
Creator: Bowles, Heather R.
Partner: UNT Libraries

Are the Needs of North Dakota's Aging Population with Developmental Disabilities Being Overlooked?

Description: North Dakota is faced with the challenge of meeting the needs of its growing population of elderly persons aging with a developmental disability. The challenge of creating new service models presents itself to professionals in the fields of Aging and Developmental Disabilities. Traditionally, the aging person with a developmental disability has been sent to nursing homes or grouped into community programs with younger persons with developmental disability. North Dakota is looking toward the future of caring for this special population through integration with elderly without disabilities.
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Date: May 2002
Creator: Clark, Amy Klein
Partner: UNT Libraries

Strategic Versus Sincere Behavior: The Impact of Issue Salience and Congress on the Supreme Court Docket

Description: The theory proposed here is that the Supreme Court behaves in a strategic manner at the agenda-setting stage in order to vote sincerely on the merits. To test this, I measure the impact issue salience and ideological distance between Congress and the Supreme Court has on the agenda. The results indicate that whether the Supreme Court behaves either sincerely or strategically depends on the policy area. The strategic nature of the Supreme Court at the agenda-setting phase may be in large part why some research shows that the Court behaves sincerely when voting on the merits. By behaving strategically at the agenda-setting phase, the Court is free to vote sincerely in later parts of the judicial process.
Date: May 2002
Creator: Williams, Jeffrey David
Partner: UNT Libraries

Lucca in the Signoria of Paolo Guinigi, 1400-1430

Description: This study analyzes the once great medieval Tuscan capital of Lucca's struggle for survival at the beginning of the fifteenth century. This was the age of the rise of regional states in Italy, and the expansionistic aims of Milan, Florence and others were a constant challenge to city-states such as Lucca which desired a political and cultural status quo. Yet, it was a challenge that was successfully met; unlike Pisa, Siena, Perugia, and various other major Tuscan cities, Lucca did not succumb to Milanese or Florentine aggression in the early Quattrocento. Why it did not is a major topic of discussion here. One of the means in which the Lucchese faced the new political and military realities of the time was the establishment of a monarchial system of government in the signoria of Paolo Guinigi (r. 1400-1430). The Guinigi Signoria was not characterized by the use of intimidation and violence, but rather by clientage, kinship and neighborhood bonds, marriage alliances, and the general consent of the people. Paolo garnered the consent of the people at first because his wealth allowed him to protect Lucca and its contado to a greater extent than would have been possible otherwise, and because of his family's long ties with the powerful Visconti of Milan; he held it later because he provided the city-state with capable leadership. This study extends the evidence of recent scholars that every Italian Renaissance city was unique based on its particular geography, alliances, civic wealth, and a number of other factors. Lucca in the period of Paolo Guinigi, a monarchy in the setting of one of the traditionally most republican cities of Italy, provides a most interesting example. “Civic humanism,” for example, has a decidedly different slant in Lucca than elsewhere, and is best exemplified in the figure of Giovanni ...
Date: May 2002
Creator: Johnson, Ken
Partner: UNT Libraries

The Effects of Non-differential Reinforcement and Differential Reinforcement on Problem Behaviors and Accuracy of Responding of Autistic Children.

Description: The effects of non-differential reinforcement and differential reinforcement on problem behaviors and accuracy of responding of autistic children was examined. In experiment 1, one child with autism participated, and in experiment 2, two children with autism participated. In the non-differential reinforcement condition both prompted and unprompted responses were reinforced. In the differential reinforcement condition only unprompted responses were reinforced. Overall, problem behaviors were more frequent in the non-differential reinforcement condition. In experiment 1, accuracy was higher in the differential reinforcement condition, while experiment 2 showed inconclusive results with regards to accuracy. It is concluded that non-differential reinforcement can decrease problem behaviors in teaching situations, but may not be sufficient to ensure acquisition of target tasks.
Date: May 2002
Creator: Ingvarsson, Einar Thor
Partner: UNT Libraries

Competency to Stand Trial: A Systematic Evaluation and Validation of the GCCT, MacCAT-CA, and ECST as Competency Measures

Description: Competency to stand trial cases constitute the largest percentage of forensic referrals for clinical psychologists. Furthermore, research suggests that the use of forensic measures facilitates the decisions of competency made by forensic examiners. This study investigated the construct validity of three competency measures: (a) the GCCT-MSH, (b) the MacCAT-CA, and (c) the ECST with 100 adult males incarcerated at the Tarrant County Jail in Fort Worth, TX. Construct validity was investigated via the use of a multitrait-multimethod research design for the three-prong conceptualization of the Dusky standard. Results indicated that current competency measures do an adequate job of assessing for factual understanding, but lack construct validity for two prongs: rational understanding and the ability to consult with counsel. In addition, the atypical presentation scales of the both GCCT and the ECST performed well at screening individuals for feigning. Finally, prediction of competency from clinical variables was also investigated. Psychotic symptoms and overall impairment were the strongest predictors of incompetency.
Date: May 2002
Creator: Grandjean, Nicole Rae
Partner: UNT Libraries

Sonata for Piano (1963) by Sergei Michailovich Slonimsky: Musical Analysis and Discussion on Interpretation and Performance

Description: The essay begins with the overview of Russian-Soviet piano music from the second half of the 19th century to the end of the 20th century. Then, biographical information about Sergei Slonimsky and an overview of his major compositions is provided. The majority of the paper focuses on Slonimsky's Sonata for Piano (1963). A brief discussion of the Sonata's compositional history is followed by the formal analysis of the overall structure of the work. Slonimsky's original principle of organization of the music is emphasized: the system of constant interrelation of the main thematic material combined with elements of the sonata-allegro form. In the analysis of the harmonic language of the piece, the composer's extensive use of Russian folk elements such as diatonic melodies, sigh motives, parallel triads, and simultaneous use of the lower third with the major triad is pointed out. The rest of the paper focuses on issues of interpretation and performance. Special notice is given to the problem of incorporating a percussive type of playing with the elements of folk cantilena singing. The paper concludes with the history of Sonata's performances and a discussion of current recordings.
Date: May 2002
Creator: Fitenko, Nikita
Partner: UNT Libraries

Theoretical Study of Second Harmonic Generation of a Blue Laser at 486 nm Using a BBO Crystal in a Standing Wave Buildup Cavity

Description: For a spectroscopy purpose, we are interested in producing continuous wave (CW) UV laser light at 243 nm with at least 2 mW power. The theory of nonlinear optics suggests that we should be able to produce a desired 2.9 mW of 243 nm light by second harmonic generation (SHG) from a 50 mW blue laser at 486 nm using a BBO crystal in a build up cavity. The most important physical parameters are calculated. A 10 mm Brewster cut BBO crystal can provide phase matching conditions for coupling two ordinary photons at 486 nm and make a secondary beam at 243 nm. The single pass conversion efficiency is calculated not to be enough to generate 2.9 mW of SH light. My investigation shows that a standing wave build up cavity can provide a buildup factor of 94 and an overall conversion efficiency of 5.9% if one use an input coupler mirror with 1.1% transmission at 486 nm.
Date: May 2002
Creator: Khademian, Ali
Partner: UNT Libraries

Supply chain relationships in apparel retail product development.

Description: The purpose of this study was to investigate supply chain relationships within the apparel retail product development process under a single site case study setting. Relationship determinants (i.e. drivers, facilitators and barriers) that facilitated or impeded the degree of collaborative efforts between the retailer and the supply chain members were identified. As the retailer integrated its product development process with its suppliers, a triangular relationship was formed between the retailer, the overseas manufacturers, and the designated suppliers. The study found that the retailer sought operational efficiency in its business relationships with supply chain members, but continued to seek long-term commitment in these relationships to establish a virtual vertical company.
Date: May 2002
Creator: Lee, Daton
Partner: UNT Libraries

An Analysis of the Effectiveness of Computer Assisted Instruction in General Chemistry at an Urban University.

Description: The science-major General Chemistry sequence offered at the University of Houston has been investigated with respect to the effectiveness of recent incorporation of various levels of computer technology. As part of this investigation, questionnaire responses, student evaluations and grade averages and distributions from up to the last ten years have been analyzed and compared. Increased use of web-based material is both popular and effective, particularly with respect to providing extra information and supplemental questions. Instructor contact via e-mail is also well-received. Both uses of technology should be encouraged. In contrast, electronic classroom presentation is less popular. While initial use may lead to improved grades and retention, these levels decrease quickly, possibly due to a reduction in instructor spontaneity.
Date: May 2002
Creator: McGuffey, Angela
Partner: UNT Libraries

Graduate Professional Training in Christian Education at Dallas Theological Seminary and Alumni Perceptions of Program Quality

Description: This study assessed the quality of graduate professional training in Christian education at Dallas Theological Seminary (DTS) in terms of the perceptions of program alumni. The subjects of the investigation were 780 alumni who graduated from DTS between 1984 and 2000. The Christian Education program was assessed utilizing Daniel Stufflebeam's CIPP model and alumni data collected from a survey instrument. A response rate of 65% (N=504) was achieved. The research procedure employed a non-experimental design methodology for the quantitative component and open-ended questions for the qualitative component. Most results were statistically significant at the .05 alpha level utilizing chi-square goodness-of-fit tests.
Date: May 2002
Creator: McLaughlin, Linden D.
Partner: UNT Libraries

A Behavioral Economic Analysis of the Effects of Unit Price Sequence on Demand for Money in Humans.

Description: Three groups of participants were exposed to different unit price sequences. Unit prices for all groups ranged from unit price 1 to 21. Analyses of demand curves, response rates, session duration, and elasticity coefficients suggest that the sequence of exposure to unit prices can affect the elasticity of demand. In addition, the size of unit price contrast, direction of unit price change, and proximity to experimental milestones also may affect the consumption of monetary reinforcers.
Date: May 2002
Creator: Williams, Jack Keith
Partner: UNT Libraries

Utilization of Technology-Enhanced Delphi Techniques

Description: This article discusses the Delphi consensus-building technique. Also discussed are the Delphi Technique's history, the process, and some advantages and disadvantages found in the literature. Finally, this article examines a technology-enhanced version of the process.
Date: 2002
Creator: Andrews, Charles G. & Allen, Jeff M.
Partner: UNT College of Information