UNT Theses and Dissertations - 663 Matching Results

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Phenotype Analysis of the CISD Gene Family Relative to Mitochondrial Function in Caenorhabditis elegans

Description: NEET proteins belong to a unique class of [2Fe-2S] cluster proteins that have been shown to participate in various biological processes such as regulating iron, reactive oxygen species and apoptosis within the cell and are localized to the mitochondria. Disruption of the mitochondrial NEET proteins are associated with different human diseases such as obesity, neurodegeneration, cancer and diabetes. In humans, a missense mutation in the CISD2 gene results in a heritable multisystem disorder term… more
Date: December 2019
Creator: Mungwira, Chipo F
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Spatial Partitioning Algorithms for Solving Location-Allocation Problems

Description: This dissertation presents spatial partitioning algorithms to solve location-allocation problems. Location-allocations problems pertain to both the selection of facilities to serve demand at demand points and the assignment of demand points to the selected or known facilities. In the first part of this dissertation, we focus on the well known and well-researched location-allocation problem, the "p-median problem", which is a distance-based location-allocation problem that involves selection and… more
Date: December 2019
Creator: Gwalani, Harsha
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Characterization, Analysis, and Optimization of Rotary Displacer Stirling Engines

Description: This work focuses on an innovative Rotary Displacer SE (RDSE) configuration for Stirling engines (SEs). RDSE features rotary displacers instead of reciprocating displacers (found in conventional SE configurations), as well as combined compression and expansion spaces. Guided by the research question "can RDSE as a novel configuration achieve a higher efficiency compared to conventional SE configurations at comparable operating conditions?", the goal of this study is to characterize, analyze, an… more
Date: December 2019
Creator: Bagheri, Amirhossein
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Uncovering Fanny Hensel's "Das Jahr": Creating an Urtext Edition that Addresses Selected Technical and Interpretive Issues through Added Fingerings and Pedal Markings

Description: Das Jahr is considered Fanny Hensel's most impressive accomplishment of piano solo work. However, the only modern edition that is extant includes many additional editorial markings. By further analyzing the sections that are technically challenging or musically demanding from an interpretive standpoint, pianists wishing to perform the work will have to find workable fingerings and pedal markings to learn this piano cycle. For this reason, this dissertation will not only provide readers with an … more
Date: December 2019
Creator: Huang, Szu Ying
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Design Method of Cold-Formed Steel Framed Shear Wall Sheathed by Structural Concrete Panel

Description: The objective of this research is developing a new method of design for cold-formed steel framed shear wall sheathed by ¾" thick USG structural panel concrete subfloor using a predictive analytical model and comparing the results obtained from the model with those achieved from real testing to verify the analytical model and predicted lateral load-carrying capacity resulted from that. Moreover, investigating the impact of various screw spacings on shear wall design parameter such as ultimate st… more
Date: December 2019
Creator: Ashkanalam, Aida
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Nano-Manufacturing of Catalytic Amorphous Alloys

Description: In this dissertation, nano-manufacturing of amorphous alloys for electro-catalytic applications is reported and the role of chemistry and active surface area on catalytic behavior is discussed. The catalytic activity of recently developed platinum and palladium-based metallic glasses was studied using cyclic voltammetry and localized electrochemical techniques. The synergistic effect between platinum and palladium was shown for amorphous alloys containing both these elements. The mechanism for … more
Date: December 2019
Creator: Hasannaeimi, Vahid
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Ensemble Singing in the Bel Canto Salon Repertory: A Pedagogical Reconsideration

Description: Vocal duets have had a long history in the Western classical music tradition. Their use as a teaching resource can be traced back to the Renaissance, where duets were used for the development of singing, performance, and musicianship. In the late 19th and all of the 20th centuries, this pathway of vocal pedagogy has markedly declined. This study proposes a reintroduction of this methodology of teaching, asserting that it provides the collegiate vocal student with maximum opportunity for growth … more
Date: December 2019
Creator: Brown, Shaun (Shaun Joseph)
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Uncle Sam Does Not Want You: Military Rejection and Discharge during the World Wars

Description: In the United States, rapid military mobilization for the world wars marked a turning point in the national need to manage and evaluate manpower. To orchestrate manpower needs for the military, industry, and those relating to familial obligations, Woodrow Wilson's administration created the Selective Service System during the First World War. In categorizing men, local Selective Service boards utilized rapid physical and psychological diagnostic techniques and applied their assessments to curre… more
Date: August 2019
Creator: Smith Chamberlain, Tiffany Leigh
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Ligand Effects in Gold(I) Acyclic Diaminocarbene Complexes and Their Influence on Regio- and Enantioselectivity of Homogeneous Gold(I) Catalysis

Description: This dissertation focuses on the computational investigation of gold(I) acyclic diaminocarbene (ADC) complexes and their application in homogeneous gold(I) catalysis. Chapter 2 is an in-depth computational investigation of the σ- and π-bonding interactions that make up the gold-carbene bond. Due to the inherent conformation flexibility of ADC ligands, distortions of the carbene plane can arise that disrupt orbital overlap between the lone pairs on the adjacent nitrogen atoms and the empty p-orb… more
Date: August 2019
Creator: Ellison, Matthew Christopher
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Choice Androgyny

Description: This work provides an alternative theory of gendered consumption that explains chronic and situational shifts in consumers' preferences for masculine, feminine, and androgynous choices, beyond the effects of gender identities.
Date: August 2019
Creator: Jones, Niusha
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

SurfKE: A Graph-Based Feature Learning Framework for Keyphrase Extraction

Description: Current unsupervised approaches for keyphrase extraction compute a single importance score for each candidate word by considering the number and quality of its associated words in the graph and they are not flexible enough to incorporate multiple types of information. For instance, nodes in a network may exhibit diverse connectivity patterns which are not captured by the graph-based ranking methods. To address this, we present a new approach to keyphrase extraction that represents the document … more
Date: August 2019
Creator: Florescu, Corina Andreea
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

The Impact of Property Tax Exemptions on the Fiscal Behavior of Cities: A Longitudinal Analysis of 41 Texas Cities

Description: As a form of tax and expenditure limitations, property tax exemptions result in an utility gap between two groups of population residing in the same community: free-riders who are paying less than they receive and contributors who are paying more than they receive. This utility gap is problematic to municipalities because contributors may exit the city as this gap becomes wider. How do municipalities respond to the increasing amount of property tax exemptions? Using 41 Texas cities data from 20… more
Date: August 2019
Creator: Sun, Jingran
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Three Essays on Artificial Intelligence Adoption and Use

Description: Artificial intelligence (AI) is quickly transforming business operations and society, as AI capabilities are incorporated into applications ranging from mobile personal assistants to self-driving cars. The potentially disruptive nature of AI calls for an extensive investigation into all aspects of AI-human interactions at individual, group, organizational and market levels. However, there is paucity of academic information systems (IS) research in this area that goes beyond the development and … more
Date: August 2019
Creator: Nguyen, Quynh
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Processing-Structure-Property Relationships of Reactive Spark Plasma Sintered Boron Carbide-Titanium Diboride Composites

Description: Sintering parameter effects on the microstructure of boron carbide and boron carbide/titanium diboride composites are investigated. The resulting microstructure and composition are characterized by scanning electron microscopy (SEM), x-ray microscopy (XRM) and x-ray diffraction (XRD). Starting powder size distribution effects on microstructure are present and effect the mechanical properties. Reactive spark plasma sintering introduces boron nitride (BN) intergranular films (IGF's) and their eff… more
Date: August 2019
Creator: Lide, Hunter
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Charpy Impact Testing of Twinning Induced Plasticity and Transformation Induced Plasticity High Entropy Alloys

Description: High entropy alloys (HEAs) are a new class of solid solution alloys that contain multiple principal elements and possess excellent mechanical properties, from corrosion resistance to fatigue and wear resistance. Even more recently, twinning induced plasticity (TWIP) and transformation induced plasticity (TRIP) non-equiatomic high entropy alloys have been engineered, promising increased strength and ductility as compared to their equiatomic counterparts. However, impact and fracture resistance o… more
Date: August 2019
Creator: Zellner, Samantha R
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Enhanced Approach for the Classification of Ulcerative Colitis Severity in Colonoscopy Videos Using CNN

Description: Ulcerative colitis (UC) is a chronic inflammatory disease characterized by periods of relapses and remissions affecting more than 500,000 people in the United States. To achieve the therapeutic goals of UC, which are to first induce and then maintain disease remission, doctors need to evaluate the severity of UC of a patient. However, it is very difficult to evaluate the severity of UC objectively because of non-uniform nature of symptoms and large variations in their patterns. To address this,… more
Date: August 2019
Creator: Sure, Venkata Leela
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Mining Biomedical Data for Hidden Relationship Discovery

Description: With an ever-growing number of publications in the biomedical domain, it becomes likely that important implicit connections between individual concepts of biomedical knowledge are overlooked. Literature based discovery (LBD) is in practice for many years to identify plausible associations between previously unrelated concepts. In this paper, we present a new, completely automatic and interactive system that creates a graph-based knowledge base to capture multifaceted complex associations among … more
Date: August 2019
Creator: Dharmavaram, Sirisha
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Cesarean Section Delivery and Exclusive Breastfeeding in Pakistan: Emerging Challenges

Description: This research examined two interrelated issues relevant to maternal and neonatal health in Pakistan, namely, the rising rates of C-section delivery and low rates of exclusive breastfeeding. By using the Andersen's health behavioral model to frame two empirical studies, the data from the Pakistan Demographic and Health Survey (PDHS) 2012-13 was used. The first empirical study examined the correlation between place of delivery and the odds of cesarean section in Pakistan. Not all Pakistani women … more
Date: August 2019
Creator: Nazir, Saman
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Relationship Quality in Social Commerce Decision-Making

Description: This research study involves three essays and examines CRQ-driven decision making from the points of view of the common firm, social-commerce platform provider, and social-commerce echo-system. It addresses CRQ's progression from traditional business-to-consumer (B2C) initiatives to social platform-specific antecedents and to environment-driven factors lying outside the direct control of the platform provider, yet influencing social commerce business decisions, such as user-generated content fr… more
Date: August 2019
Creator: Dinulescu, Catalin C
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

The Effects of Benefit Types on Customer Loyalty in Integrated Resorts

Description: This study examined the relationships between the six benefit types and customer loyalty through trust and satisfaction in integrated resorts. A self-administered survey was developed based on previous studies in customer loyalty and was distributed through e-Reward online survey panel. The findings showed that only financial gaming benefits, functional gaming benefits, and psychological non-gaming benefits had impacts on customer attitudinal loyalty and customer behavioral loyalty through trus… more
Date: August 2019
Creator: Su, Hsiang Wen
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Diverse Learners in the Classroom: Students with Special Needs Enrolled in Science, Technology, Engineering, and Mathematics (STEM) Texas Public Classrooms

Description: The purpose of this study was to determine if students with special needs participating in an inclusive classroom can learn the skills related to a STEM career as compared to the general student population. The study involved seventh grade students from two rural middle schools in north central Texas and was framed through a constructivist lens using a quasi-experimental design with a convenience sample. The Solenoid Invention Kit Assessment and the STEM Semantics Survey used in this study were… more
Date: August 2019
Creator: Briones, San Juanita G
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Asian and Asian Indian American Immigrant Students: Factors Influencing Their Academic Performance

Description: Asian American students have done well in school; they have had higher academic achievements, higher academic scores, lower dropout rates and higher college entrance rates as compared to other minorities and generally other students in the United States (U.S.). A possible explanation to the higher academic performance and achievement of the Asian American students is that they are more likely to have experienced an environment that is conducive to learning at home; their parents were involved a… more
Date: August 2019
Creator: Mathew, Subhas
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Bipolar Spectrum Traits in Day-to-Day Life: Ecological Momentary Assessment of Reward Sensitivity, Circadian Timing, and Experience of Reward in the Environment

Description: The current study examined 236 undergraduate students in a week long twice-per-day ecological momentary assessment exploring the influence of baseline reward sensitivity and interactions between circadian variables (i.e., total sleep time, sleep quality) and daily measures of reward. Though primary study findings did not support reward sensitivity related moderation of sleep-reward pathways, a number of notable findings emerged. We found evidence of specific domains of reward sensitivity (antic… more
Date: August 2019
Creator: Smith, Patrick M.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Comparing Cognitive Functioning in White Mexican/Mexican Americans and non-Hispanic White Americans with and without Type 2 Diabetes

Description: To better understand the impact of type 2 diabetes, the relationship between ethnicity, specifically Mexican/Mexican American ethnicity, and the disease must be further investigated. This study specifically examined the cognitive impact of type 2 diabetes. Data from the 2014 Health and Retirement Study was used to compare the cognitive functioning of non-Hispanic White (n = 10,658) and White Mexican/Mexican American (n = 847) individuals, age 50+ years, with and without type 2 diabetes. Serial … more
Date: August 2019
Creator: Saldana, Samantha Lee
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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