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Multilingual Word Sense Disambiguation Using Wikipedia

Description: Ambiguity is inherent to human language. In particular, word sense ambiguity is prevalent in all natural languages, with a large number of the words in any given language carrying more than one meaning. Word sense disambiguation is the task of automatically assigning the most appropriate meaning to a polysemous word within a given context. Generally the problem of resolving ambiguity in literature has revolved around the famous quote “you shall know the meaning of the word by the company it keeps.” In this thesis, we investigate the role of context for resolving ambiguity through three different approaches. Instead of using a predefined monolingual sense inventory such as WordNet, we use a language-independent framework where the word senses and sense-tagged data are derived automatically from Wikipedia. Using Wikipedia as a source of sense-annotations provides the much needed solution for knowledge acquisition bottleneck. In order to evaluate the viability of Wikipedia based sense-annotations, we cast the task of disambiguating polysemous nouns as a monolingual classification task and experimented on lexical samples from four different languages (viz. English, German, Italian and Spanish). The experiments confirm that the Wikipedia based sense annotations are reliable and can be used to construct accurate monolingual sense classifiers. It is a long belief that exploiting multiple languages helps in building accurate word sense disambiguation systems. Subsequently, we developed two approaches that recast the task of disambiguating polysemous nouns as a multilingual classification task. The first approach for multilingual word sense disambiguation attempts to effectively use a machine translation system to leverage two relevant multilingual aspects of the semantics of text. First, the various senses of a target word may be translated into different words, which constitute unique, yet highly salient signal that effectively expand the target word’s feature space. Second, the translated context words themselves embed co-occurrence information ...
Date: August 2013
Creator: Dandala, Bharath

Minority Stress, Spirituality and Psychological Quality of Life in a Lesbian, Gay and Bisexual Sample

Description: Unique factors associated with the experience of spirituality and religiosity for many in lesbian, gay and bisexual (LGB) communities include minority stress. Using structural equation modeling, we examined whether minority stress mediates the relationship between spirituality and psychological quality of life (QOL). Results indicate minority stress mediates the relationship between spirituality and psychological QOL for gay men and bisexuals. However, minority stress is not a significant mediator for lesbians. Therefore, lesbians may experience minority stress and its relationship to psychological QOL differently than gay men and bisexuals due to higher societal acceptance. This study provides support for examining lesbians, gay men and bisexuals separately rather than as one sexual minority group.
Date: August 2013
Creator: Purser, Megan M.

The Relationship of Counselor Education Program Applicants’ Cognitive Complexity to Other Admission Criteria

Description: Counselor cognitive complexity is a counselor’s ability to recognize and organize multiple characteristics that might affect client needs. I examined whether various admissions criteria–Graduate Record Examination (GRE) Verbal, Quantitative, and Analytical Writing scores; previous coursework grade point averages; and faculty co-leaders’ admissions group interview ratings–for 182 applicants to a southwestern U.S. CACREP-accredited master’s counseling program predicted cognitive complexity scores on a modified Counselor Cognitions Questionnaire (CCQ). Participants were predominantly ages 20 to 30 years (91.8%), female (91.8%), and White (81.3%). Multiple regression analyses showed statistical significance with small effect sizes: the admissions criteria together significantly predicted cognitive complexity differentiation (p = .033), accounting for 6.6% of variance, and cognitive complexity integration (p = .003), accounting for 9.8% of variance. The small effect sizes and low variance percentages support the idea that cognitive complexity measured by the modified CCQ is a substantially different phenomenon from commonly-assessed academic aptitude and personality characteristics. If future researchers confirm these findings with additional samples, subsequent researchers could determine whether one or both domains of cognitive complexity, either alone or in combination with one or more of the commonly used admissions criteria, could help counselor educators better predict which applicants will be successful in master’s programs and the counseling field.
Date: August 2013
Creator: De La Garza Jr., Mario A.

Innovation Teams: an Empirical Examination of the Relationship of Team Climate and Development Strategies in Consumer Packaged Goods Industries

Description: Companies’ new primary source for sustainable revenue growth comes from creating new innovations, rather than from mergers and acquisitions. Companies are finding it difficult to align internal support for the innovative creativity of teams with standard operating procedures. This research aims to discover how innovative teams contribute to forming development strategies that CPG firms use to create new products. Dimensions of the Theory of Team Climate in Innovation (TTCI) offer insight on the dimensions of development strategy. Specifically, by integrating the theories, a proposed model identifies the innovation team’s impact on the firm’s development strategies. Such understanding has the potential to increase firm profits, lower innovation costs, increase innovation speed, and support innovation training. To empirically test this model, employees responsible for product development in the consumer packaged goods (CPG) industries were surveyed. Structural modeling techniques were used to analyze the data. Findings indicate support for using TTCI to explain the compressed development strategy. Theoretical contributions include: 1) extending TTCI and its associated measures into tangible products industries, 2) refining and adding to TTCI measures, 3) extending the development strategies theory into tangible products industries, and 4) adding to the measures for development strategy. Future research appears fertile for methods and measures used in this study, and managers in CPG will benefit from an enhanced understanding of how to better structure innovation teams in alignment with a firm’s development strategy.
Date: August 2013
Creator: Mims, Tina C.

Site Formation Processes and Bone Preservation Along the Trinity River Basin, North Central Texas

Description: This thesis presents the results of geoarchaeological investigations of several archaeological sites along the Elm Fork of the Trinity River in north central Texas. Archaeological data recorded from mitigation excavations in Denton and Cooke counties were analyzed to understand the geologic impacts on faunal preservation resulting from site formation processes. The faunal assemblages are highly fragmented, even in settings known for good preservation. A combined approach using geoarchaeological and taphonomic techniques was implemented to examine how fragmentation, evidence of soil weathering, and differential preservation were impacted by differing geologic conditions throughout the river basin. Intrasite and intersite results of the sites show that a great deal of variability of faunal preservation is present at difference scales of analysis.
Date: August 2013
Creator: Colvin, Jessica

The Effects of Adlerian Play Therapy on Maladaptive Perfectionism and Anxiety and in Children

Description: I used singlecase A-B-A experimental design to examine the effectiveness of Adlerian play therapy (AdPT) for children identified with clinical levels of perfectionism on the Conners Parent Rating Scale-Revised and Conners Teacher Rating Scale-Revised. Participants were 2 children, a 10 year-old Hispanic male and a 7 year-old Caucasian female. To examine the effect of AdPT on maladaptive perfectionism and anxiety, the Child-Adolescent Perfectionism Scale and the Revised Children’s Manifest Anxiety Scale were administered to the children twice weekly over 3 phases of the study: baseline (6 administrations), intervention (12-16 administrations), and maintenance (6 administrations) for a total of 24 to 29 data points. Additionally, parents and teachers completed the Conners Rating Scales-Revised5 times: (1) prior to study, (2) following baseline/prior to treatment, (3) midpoint of treatment, (4) following treatment, and (5) following maintenance phase.During the intervention phase, the male and female participants attended 21 and 16 play therapy sessions, their mothers attended 6 and 5 parent consultations, and their teachers attended 6 and 3 teacher consultations, respectively. Analysis of the child self-report assessments indicated mixed and inconclusive results regarding the effects of AdPT on target behaviors. However, results of the parent and teacher reports indicated clinically significant reductionsin maladaptive perfectionism and anxiety over the five points of measurement for both participants. The participants’ maladaptive perfectionism moved from the clinical to the normal range. Implications for practice and future research are indicated.
Date: August 2013
Creator: Akay, Sinem

Developing a Collection Digitization Workflow for the Elm Fork Natural Heritage Museum

Description: Natural history collections house immense amounts of data, but the majority of data is only accessible by locating the collection label, which is usually attached to the physical specimen. This method of data retrieval is time consuming and can be very damaging to fragile specimens. Digitizing the collections is the one way to reduce the time and potential damage related to finding the collection objects. The Elm Fork Natural Heritage Museum is a natural history museum located at the University of North Texas and contains collections of both vertebrate and invertebrate taxa, as well as plants. This project designed a collection digitization workflow for Elm Fork by working through digitizing the Benjamin B. Harris Herbarium. The collection was cataloged in Specify 6, a database program designed for natural history collection management. By working through one of the museum’s collections, the project was able to identify and address challenges related to digitizing the museum’s holdings in order to create robust workflows. The project also produced a series of documents explaining common processes in Specify and a data management plan.
Date: August 2013
Creator: Evans, Colleen R.

Source Apportionment Analysis of Measured Volatile Organic Compounds in Corpus Christi, Texas

Description: Corpus Christi among of the largest industrialized coastal urban areas in Texas. The strategic location of the city along the Gulf of Mexico allows for many important industries and an international business to be located. The cluster of industries and businesses in the region contribute to the air pollution from emissions that are harmful to the environment and to the people living in and visiting the area. Volatile organic compounds (VOC) constitute an important class of pollutants measured in the area. The automated gas chromatography (Auto GC) data was collected from Texas Commission of Environmental Quality (TCEQ) and source apportionment analysis was conducted on this data to identify key sources of VOC affecting this study region. EPA PMF 3.0 was employed in this sources apportionment study of measured VOC concentration during 2005 - 2012 in Corpus Christi, Texas. The study identified nine optimal factors (Source) that could explain the concentration of VOC at two urbane monitoring sites in the study region. Natural gas was found to be the largest contributor of VOC in the area, followed by gasoline and vehicular exhaust. Diesel was the third highest contributor with emissions from manufacturing and combustion processes. Refineries gases and evaporative fugitive emissions were other major contributors in the area; Flaring operations, solvents, and petrochemicals also impacted the measured VOC in the urban area. It was noted that he measured VOC concentrations were significantly influenced by the economic downturn in the region and this was highlighted in the annual trends of the apportioned VOC.
Date: May 2014
Creator: Abood, Ahmed T.

El Cine De Terror Español Como Espejo De La Cultura Española

Description: This study traces the history and culture of Spain as seen through the lens of the nation´s production of horror cinema. Starting from the boom of Spanish horror film in the early 1960s, the thesis compares and contrasts the political and social aspects of Spanish society throughout three distinct eras of the 20th century: 1962 – 1975 (the boom of Spanish horror film through the Franco dictatorship), 1975 – 1999 (the transition to democracy through the end of the 20th century) and 2000 – present (the 21st century). Movies as diverse as Gritos en la noche (1962, Jesús Franco), ¿Quién puede matar a un niño? (1976, Narciso Ibáñez Serrador) and Angustia (1987, Bigas Luna) are framed by culturally-related anectodes as well as correlations to their respective social environments. Special attention has been paid to the production and release of each film, especially in regards to censorship during the Franco dictatorship. The results show that Spanish horror cinema has acted as a true mirror to culture, society and politics in its native country throughout the 20th century and that this trend will likely extend in to the future.
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Date: May 2014
Creator: Donahue, Tyler

The Information Politics Assessment Scale (Ipas): Developing and Testing an Instrument to Measure and Identify the Information Politics of Organizations

Description: Information politics is a concept widely acknowledged in several disciplines. However, scant empirical evidence exists in the literature that codifies or measures information politics as a construct. This exploratory study developed and tested the Information Politics Assessment Scale (IPAS), a survey instrument that measured individual perceptions of organizational information artifacts as indictors of its information politics. Data collected with the IPAS was examined to investigate the latent structure of the information politics variable, determine information politics models, and explore the relationship between information politics, strategy, and organization effectiveness. A purposive sample of 240 participants from a cross-section of organizations completed the IPAS in an online administration. Exploratory factor analysis generated three factors, labeled Behavioral Flexibility (BF), Environmental Sensitivity (ES), and Structural Autonomy (SA), suggesting three dimensions of the information politics variable. Cluster analysis of aggregate scores on the BF, ES, and SA factors together resulted in determining four distinct information politics models. Crosstab and ANOVA, respectively, enabled explaining the relationship between strategy and information politics, and how it influenced organization effectiveness. This study breaks ground by broadening the theoretical and empirical understanding of information politics in confirming the proposition that an organization’s information artifacts are measureable and reliable indicators of its information politics. Further, it supports the efficacy of the IPAS to identify the information politics model operating in a given organization.
Date: May 2014
Creator: Reed, Richard

Social Exclusion and Green Consumption

Description: Social exclusion has garnered much attention from researchers across the social sciences, especially among social psychologists. However, given the fact that social relationships and consumption are two of the central activities in daily life, there is surprisingly little research on the impact of social connection threats within the realm of consumer behavior. This study examines the effect of social exclusion on proenvironmental behavior and green consumption. More precisely, the objectives of this study are threefold. The first objective is to examine whether the findings in social psychology literature on how excluded individuals respond to exclusion when they are exposed to proenvironmental consumption behavior. The second objective of this research is to find the underlying mechanism and to rule out some of the possible explanations (e.g., mood) for this effect. The final objective of this study is to establish some of the boundary conditions (individual differences and situational factors) for the proposed effect. The hypotheses of this study were developed based on two main theoretical bases borrowed from social psychology literature: empathy-altruism hypothesis (Batson 1991) and social reconnection hypothesis (Maner et al. 2007). Overall, it was proposed that while social exclusion decreases individuals’ inclination to engage in proenvironmental activities, socially excluded people are motivated to use green consumption behaviors to establish new social bonds with others. These propositions were tested and supported across four experiments. Across these experiments, the findings demonstrated that social exclusion causes people to express lower tendency to engage in proenvironmental behaviors. The findings also consistently suggest that mood does not explain why social rejection leads to negative environmental outcomes. Additionally, social exclusion appears to cause a temporary absence of empathic concern toward others, which leads to less green behavior with altruistic motivation. Further, the role of emotional empathy as a boundary condition was tested in this study ...
Date: August 2013
Creator: Naderi, Iman

An Investigation Into the Relationships Between the Technological Pedagogical Content Knowledge of University Teacher Education Faculty and Their Age, Rank, and Gender

Description: The purpose of this study was to determine what relationships exist between the age, rank, and gender of university faculty in teacher education and their technological pedagogical content knowledge. The survey instrument used was the Survey of Teacher Educators’ Technological Pedagogical Content Knowledge (TPACK) which is an adaptation of the Survey of Preservice Teachers’ Knowledge of Teaching and Technology developed by Schmidt. A total of 347 public Texas university teacher education faculty members participated in the study. Multiple regressions were utilized and the effect size was considered to determine the strength of the relationship between the variables. A statistical significance was found relating to the age, rank, and gender of the university teacher educator faculty member and their technological knowledge (TK). Based on the information provided for the b weights, age was found to be the best predictor of their technological knowledge (TK). The discriminant analysis identified what relationship exists between the ages of university teacher education faculty technology knowledge. The results of the discriminant analysis indicate the range 20-30 and 60+ contribute equally to teacher educators’ technological knowledge. Although no statistically significant results were determined with respect to the correlations between gender, age, and rank and technological content knowledge, technological pedagogical knowledge, and technological pedagogical content knowledge, the descriptive data does suggest that some insight maybe gained from further analysis.
Date: August 2013
Creator: Hamilton, Christina

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 than previously suggested in the literature, and in this study, the organization proved to be largely self-taught. Students used their social networks to build a kind of group expertise that compensated for their youthful naivety. Students exhibited self-control within the search to the degree that they could focus on what they wanted to find, and they used heuristics—mental shortcuts—to achieve what they needed. Searches also suggest creativity in that students were flexible in their search methods and used a number of tools to gather information. Students could balance the needs of the academic or imposed search with their own online lives, meaning that they made compensations for social media and media multitasking when it was deemed necessary.
Date: August 2013
Creator: Kurtenbach, John

Athletic Trainers and Sport Psychology: Knowledge, Experience and Attitudes

Description: Certified athletic trainers (ATCs) play a unique role in sport environments as the primary medical staff available to athletes. Thus, ATCs are well positioned to oversee athletes’ physical and psychological well-being. Although sport psychologists (SPs) have been identified as a potential resource for ATCs, previous studies have reported a lack of collaboration between SPs and ATCs. This study aimed to (a) examine ATCs’ views regarding professional roles for both ATCs and SPs, (b) explore ATCs’ referral behaviors, (c) evaluate ATCs belief in the credibility of sport psychology across demographic (i.e., gender, age) and experiential variables (i.e., access to SPs), and (d) examine ATCs’ involvement in sport psychology. Four hundred ninety-six ATCs (265 men, 231 women) completed and returned the questionnaire. ATCs viewed assisting in the psychological recovery of athletes as the most acceptable professional role for fellow ATCs; aiding in the psychological recovery of injured athletes and teach mental skills were identified by ATCs as the most appropriate roles for SPs. In considering an athlete experiencing interpersonal difficulties (e.g., relationship problems), a mixed design ANOVA revealed a ATC sex by referral option interaction; female and male ATCs indicated they would likely refer the athlete to a counselor/therapist, followed by a SP, however, female ATCs reported a greater likelihood of referring to a counselor/therapist than male ATCs whereas male ATCs indicated a greater likelihood of referring to a SP. Further, ATCs’ regular access to SPs and completion of formal sport psychology coursework were identified as variables associated with greater belief in the credibility of sport psychology. These results suggest that access and previous experience with SPs remain significant variables associated with ATCs views about, and belief in, the work of SPs. Implications for sport psychology professionals and recommendations for future research are discussed.
Date: May 2014
Creator: Ramaeker, Joseph P.

Development and Validation of an Instrument to Operationalize Information System Requirements Capabilities

Description: As a discipline, information systems (IS) has struggled with the challenge of alignment of product (primarily software and the infrastructure needed to run it) with the needs of the organization it supports. This has been characterized as the pursuit of alignment of information technology (IT) with the business or organization, which begins with the gathering of the requirements of the organization, which then guide the creation of the IS requirements, which in turn guide the creation of the IT solution itself. This research is primarily focused on developing and validating an instrument to operationalize such requirements capabilities. Requirements capabilities at the development of software or the implementation of a specific IT solution are referred to as capabilities for software requirements or more commonly systems analysis and design (SA&D) capabilities. This research describes and validates an instrument for SA&D capabilities for content validity, construct validity, internal consistency, and an exploratory factor analysis. SA&D capabilities were expected to coalesce strongly around a single dimension. Yet in validating the SA&D capabilities instrument, it became apparent that SA&D capabilities are not the unidimensional construct traditionally perceived. Instead it appears that four dimensions underlie SA&D capabilities, and these are associated with alignment maturity (governance, partnership, communications, and value). These sub factors of requirements capabilities are described in this research and represent distinct capabilities critical to the successful alignment of IT with the business.
Date: May 2014
Creator: Pettit, Alex Z.

Consumer Shopping Motivations with Facebook Retailers: Utilitarian Versus Hedonic

Description: Retailers increasingly are connecting with consumers using social media. This two-way, networked communication method facilitates word-of-mouth that may ultimately impact retailer loyalty. The purpose of this study was to examine motivations of consumers’ purchase intention from apparel Facebook retailers, and the relationship between purchase intention and loyalty. Consumer motivations were examined in terms of the utilitarian values of cost, convenience, and information and the hedonic values of experiential shopping, bargain perception, sociability, and curiosity. The relationship of purchase intention and loyalty also was investigated. The instrument was developed from existing scales drawn from literature. A consumer panel (N = 250) of Facebook users that connect to apparel retailers was used to collect data through an online Qualtrics survey. Statistical analysis included descriptive statistics of frequency and crosstab distributions, factor analysis, and regression analysis. Factor analysis resulted in four dimensions including convenience, information, experience, and bargains. All motivators were found to be significantly related to both purchase intention and loyalty for this consumer group. The variable with the strongest relationship to both purchase intention and loyalty was experience. Additionally, a strong relationship was found between purchase intention and loyalty. Lastly, practical business implications are reviewed, in addition to limitations of the study.
Date: May 2014
Creator: Anderson, Kelley B.

Remembering and Narrating in Borges’ “Funes the Memorious” and Camus’ the Stranger

Description: In The Stranger, a novel by Albert Camus, and in “Funes the Memorious,” a short story by Jorge Luis Borges, the homodiegetic narrators have a significant effect on the referential aspect of their personal experiences. Chronologically these remembered experiences are positioned before the moment when they are narrated. The act of remembering is thus a form of subsequent narration. In both texts, memory is a project rather than an object because it is recounted and not found. In the sense that it is told, memory is necessarily a creative act and thus not faultless because the story of an experience is not the experience itself. The memories in The Stranger and in “Funes the Memorious” are not reconstituted but narrated. The peculiarity of the two texts lies in the fact that the narrators take an external position when describing their own past, emphasizing the imperfect aspect of the narrators’ memory. With a narratological approach to the texts and a Sartrean interpretation of memory, I study the effects of focalization on the act of remembering. By explaining the relationship between focalization, memory and the narratee, I show that the act of remembering is not a repetition of past events or experiences but rather an inventive process that occurs always in the present. I argue that external focalization is a more authentic way to tell the story of a past experience because it emphasizes the fact that memory is always in the process of being made and therefore uncertain and incomplete even to the individual remembering.
Date: August 2013
Creator: Stroud, Carl Eugene

Exploring Fundamental Principles in the Study of Derived Relational Responding in Pigeons

Description: A persistent challenge for behaviorally-based accounts of learning has been providing an account of learning that occurs in the absence of systematically programmed contingencies of reinforcement. Symmetry, one type of emergent behavior, has been repeatedly demonstrated with humans, but has been considerably more difficult to demonstrate with non-humans. In this study, pigeons were exposed to a go/no-go procedure in which hue stimuli were presented full screen on a touchscreen monitor. Pigeons learned 12 baseline relations in less than 30 days. Traditional measures used to evaluate symmetry indicated that, during tests, three of the four birds responded more to the reverse of relations that were reinforced in training than to the reverse of relations that were not reinforced in training. However, additional analyses of these data suggests that these differences were driven by one of two trial types and that symmetry was only observed for one of the two predicted relations. These data systematically replicate and extend work by Urcuioli and colleagues and point to areas where further research is needed.
Date: August 2013
Creator: Hinnenkamp, Jay Evan

A Longitudinal Study Describing the Career Identity Development of Low Income and First Generation College Bound Students

Description: This mixed methods study investigated the influence of a career development program attended by low income, first generation, college bound students. Phase I took place in 2006 and 2007 when the students participated in the Upward Bound summer Bridge program. During Phase II in 2009, follow up interviews were conducted. Phase III was completed in 2014 and also included follow-up interviews. Career Identity (CI) scores from My Vocational Situation and Holland codes from the Self Directed Search were obtained during each phase. Changes in measured career identity scores and codes were interpreted by taking into account the students’ experiences. Interviews examined common themes demonstrating the career development of the participants.
Date: May 2014
Creator: Estrada-Hamby, Lisa S.

Effect of Dispersed Particles and Branching on the Performance of a Medium Temperature Thermal Energy Storage System

Description: The main objective of my thesis is to develop a numerical model for small-scale thermal energy storage system and to see the effect of dispersing nano-particles and using fractal-like branching heat exchanger in phase change material for our proposed thermal energy storage system. The associated research problems investigated for phase change material (PCM) are the low thermal conductivity and low rate of heat transfer from heat transfer fluid to PCM in thermal energy storage system. In this study an intensive study is carried out to find the best material for thermal storage and later on as a high conductive nano-particle graphite is used to enhance the effective thermal conductivity of the mixed materials. As a thermal storage material molten solar Salt (60% NaNO3+40%KNO3) has been selected, after that detailed numerical modeling of the proposed design has been done using MATLAB algorithm and following the fixed grid enthalpy method. The model is based on the numerical computation of 1-D finite difference method using explicit scheme. The second part of the study is based on enhancing the heat transfer performance by introducing the concept of fractal network or branching heat exchanger. Results from the numerical computation have been utilized for the comparison between a conventional heating system (with a simple single tube as a heat exchanger) and a passive PCM thermal energy storage system with branching heat exchanger using NTU-effectiveness method and charging time calculation. The comparison results show a significant amount improvement using branching network and mixing nano-particle in terms of heat transfer (13.5% increase in effectiveness of branching level-02 heat exchangers from the conventional one ), thermal conductivity (increased 73.6% with 20% graphite nano-particle mix with solid PCM), charging time (57% decrease of charging time for the effect of both the dispersion of Graphite nano-particle and branching heat exchange) and ...
Date: August 2013
Creator: Hasib, A. M. M. Golam

A Performance Analysis of Solar Chimney Passive Ventilation System in the Unt Zero Energy Lab

Description: The purpose of this investigation is to find out suitability of the solar chimney natural ventilation system in a Zero Energy Lab located at the University of North Texas campus, to figure out performance of the solar chimney. Reduction in the heating and ventilation and air conditioning energy consumption of the house has been also analyzed. The parameters which are considered for investigation are volumetric flow rate of outlet of chimney, the absorber wall temperature and glass wall temperatures. ANSYS FLUENT 14.0 has been employed for the 3-D modeling of the solar chimney. The dimensions of the solar chimney are 14’2” X 7’4” X 6’11”. The flow inside solar chimney is found to be laminar and the simulation results show that maximum outlet volumetric flow rate of about 0.12m3/s or 432 cfm is possible from chimney. The experimental velocity of chimney was found to be 0.21 m/s. Density Boussinesq approximation is considered for the modeling. Velocity and temperature sensors have been installed at inlet and outlet of the chimney in order to validate the modeling results. It is found that based on simulated volumetric flow rate that cooling load of 9.29 kwh can be saved and fan power of 7.85 Watts can be saved.
Date: August 2013
Creator: Talele, Suraj H.

A Pedagogical and Methodical Approach to Unaccompanied Euphonium Literature Through Performance and Analyses of Original Works by Torstein Aagaard-nilsen

Description: Original unaccompanied literature currently stands as one of the most understudied bodies of music in the euphonium repertory. This is largely due to a lack of access to reference recordings, live performances, and study/performance guides. Many of the commissioning projects for new euphonium music in the late 20th and early 21st centuries have promoted the composition of large scale works for euphonium and large ensembles, but very few have generated new unaccompanied pieces for euphonium. Many of the most recent commissions for unaccompanied euphonium music have been for competitions such as the Lieksa Brass Festival (Finland) and Leonard Falcone International Festival (USA). These competitions are also where many students get their only exposure to the unaccompanied repertoire. Unfortunately, there is a small number of standard unaccompanied works that are continuously recycled for these competitions and the exposure to new pieces in the repertoire is further diminished for many developing euphoniumists. This study will examine the three works for unaccompanied euphonium by Torstein Aagaard-Nilsen and provide solutions for many common technical challenges and pose suggestions for approaching and preparing this genre of music. Connections are made throughout the study to specific etudes and other unaccompanied solos that can be used as complementary and precursory studies to aid in the mastery of this literature.
Date: August 2013
Creator: Nyren, Patrick J.

The Effect of Natural Gas Well Setback Distance on Drillable Land in the City of Denton, Texas

Description: Municipalities protect human health and environmental resources from impacts of urban natural gas drilling through setback distances; the regulation of distances between well sites and residences, freshwater wells, and other protected uses. Setback distances have increased over time, having the potential to alter the amount and geographical distribution of drillable land within a municipality, thereby having implications for future land use planning and increasing the potential for future incompatible land uses. This study geographically applies a range of setback distances to protected uses and freshwater wells in the city limits of Denton, Texas to investigate the effect on the amount of land remaining for future gas well development and production. Denton lies on the edge of a productive region of the Barnett Shale geological formation, coinciding with a large concentration of drillable land in the southwestern region of the study area. This region will have the greatest potential for impacts to future municipal development and land use planning as a result of future gas well development and higher setback standards. Given the relatively high acreage of drillable land in industrially zoned subcategory IC-G and the concern regarding gas well drilling in more populated areas, future drilling in IC-G, specifically in IC-G land cover classes mowed/grazed/agriculture and herbaceous, would have the least impact on residential uses and tree cover, as well as decreasing the potential for future incompatible land uses.
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Date: May 2014
Creator: Daniel, Michael

Defining the Contralto Voice Through the Repertoire of Ralph Vaughan Williams

Description: At the beginning of the twentieth century, the recognition of the contralto voice type had reached its apex in England. Throughout the remainder of the century, the number and popularity of recorded contraltos has decreased alongside the rise of the mezzo-soprano voice type. Due to the contralto’s decline and the lack of repertoire composed specifically for the voice, the definition of “contralto” remains somewhat ambiguous. The large contralto repertoire of English composer Ralph Vaughan Williams displays a unique sensitivity to the contralto, particularly with regards to vocal range, flexibility, tessitura, and sustainability. These works thus suggest a new perspective for the voice type. The scope of Vaughan Williams’s oeuvre examined includes each of his operatic roles for contralto and choral works featuring the contralto. Also examined will be the compositional techniques implemented within these pieces which demonstrate the strengths and weaknesses of the contralto voice. A workable definition of the voice type for the pedagogue and performer is included.
Date: May 2014
Creator: Daniels, Sarah M.