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  Partner: UNT Libraries
 Degree Level: Master's
 Collection: UNT Theses and Dissertations
The Study of Temporal and Spatial Variability of Degree Day Factor of Snowmelt in Colorado

The Study of Temporal and Spatial Variability of Degree Day Factor of Snowmelt in Colorado

Date: May 2016
Creator: Pokhrel, Pranav
Description: Snowmelt is one of the major sources of surface water supply and ground-water recharge in high elevation areas and can also cause flooding in snow dominated watersheds. Direct estimation of daily snowmelt requires daily snow water equivalent (SWE) measurements that are not always available, especially in places without monitoring stations. There are two alternative approaches to modeling snowmelt without using direct measurements of SWE, temperature-based and energy-based models. Due to its simplicity, computational efficiency, and less input data requirement, the temperature-based method is commonly used than the energy-based method. In the temperature-index approach snowmelt is estimated as a linear function of average air temperature, and the slope of the linear function is called the degree-day factor (DDF). Hence, the DDF is an essential parameter for utilizing the temperature-based method to estimate snowmelt. Thereby, to analyze the spatial properties of DDF, 10 years DDF from the entire state of Colorado was calculated for this research. Likewise, to study the temporal properties, DDFs for 27 years from the White Yampa water basin and the Colorado Headwaters water basin were calculated. As a part of the spatial analysis, the calculated DDFs were correlated with spatial variables (slope, aspect, latitude and elevation) and a ...
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Causes of the Jewish Diaspora Revolt in Alexandria: Regional Uprisings from the Margins of Greco-Roman Society

Causes of the Jewish Diaspora Revolt in Alexandria: Regional Uprisings from the Margins of Greco-Roman Society

Date: May 2016
Creator: Vargas, Miguel M
Description: This thesis examines the progression from relatively peaceful relations between Alexandrians and Jews under the Ptolemies to the Diaspora Revolt under the Romans. A close analysis of the literature evidences that the transition from Ptolemaic to Roman Alexandria had critical effects on Jewish status in the Diaspora. One of the most far reaching consequences of the shift from the Ptolemies to Romans was forcing the Alexandrians to participate in the struggle for imperial patronage. Alexandrian involvement introduced a new element to the ongoing conflict among Egypt’s Jews and native Egyptians. The Alexandrian citizens consciously cut back privileges the Jews previously enjoyed under the Ptolemies and sought to block the Jews from advancing within the Roman system. Soon the Jews were confronted with rhetoric slandering their civility and culture. Faced with a choice, many Jews forsook Judaism and their traditions for more upwardly mobile life. After the outbreak of the First Jewish War Jewish life took a turn for the worse. Many Jews found themselves in a system that classified them according to their heritage and ancestry, limiting advancement even for apostates. With the resulting Jewish tax (fiscus Judaicus) Jews were becoming more economically and socially marginalized. The Alexandrian Jews were ...
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Hungering for Independence: The Relationship between Food and Morale in the Continental Army, 1775-1783

Hungering for Independence: The Relationship between Food and Morale in the Continental Army, 1775-1783

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Date: May 2016
Creator: Maxwell, Nancy
Description: An adequate supply of the right kinds of foods is critical to an army's success on the march and on the battlefield. Good food supplies and a dire lack of provisions have profound effects on the regulation, confidence, esprit de corps, and physical state of an army. The American War of Independence (1775-1783) provides a challenging case study of this principle. The relationship between food and troop morale has been previously discussed as just one of many factors that contributed to the success of the Continental Army, but has not been fully explored as a single issue in its own right. I argue that despite the failures of three provisioning system adopted by the Continental Congress - the Commissariat, the state system of specific supplies, and the contract system - the army did keep up its morale and achieve the victory that resulted in independence from Great Britain. The evidence reveals that despite the poor provisioning, the American army was fed in the field for eight years thanks largely to its ability to forage for its food. This foraging system, if it can be called a system, was adequate to sustain morale and perseverance.
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Laser Ablation Inductively Coupled Plasma Mass Spectrometry and Raman Spectroscopy Imaging of Biological Tissues

Laser Ablation Inductively Coupled Plasma Mass Spectrometry and Raman Spectroscopy Imaging of Biological Tissues

Date: May 2016
Creator: Gorishek, Emma
Description: Laser Ablation Inductively coupled plasma mass spectrometry (LA-ICP-MS) and Raman spectroscopy are both powerful imaging techniques. Their applications are numerous and extremely potential in the field of biology. In order to improve upon LA-ICP-MS an in-house built cold cell was developed and its effectiveness studied by imaging Brassica napus seeds. To further apply LA-ICP-MS and Raman imaging to the field of entomology a prong gilled mayfly (Ephemeroptera: Leptophlebiidae) from the Róbalo River, located on Navarino Island in Chile, was studied. Analysis of both samples showcased LA-ICP-MS and Raman spectroscopy as effective instruments for imaging trace elements and larger molecules in biological samples respectively.
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Forgotten Legacies: The U.S. Glider Pilot Training Program and Lamesa Field, Texas, During World War II

Forgotten Legacies: The U.S. Glider Pilot Training Program and Lamesa Field, Texas, During World War II

Date: May 2016
Creator: Garner, Christian A.
Description: Rapidly initiated at the national, regional, and local levels, the American glider pilot training program came about due to a perceived need after successful German operations at the outset of World War II. Although the national program successfully produced the required number of pilots to facilitate combat operations, numerous changes and improvisation came to characterize the program. Like other American military initiatives in the twentieth century, the War Department applied massive amounts of effort, dollars, and time to a program that proved to be short-lived in duration because it was quickly discarded when new technologies appeared. At the local level, the real loser was Lamesa, Texas. Bearing the brunt of these changes by military decision makers, the citizens of Lamesa saw their hard-fought efforts to secure an airfield fall quickly by the wayside in the wake of changing national defense priorities. As generations continue to pass and memories gradually fade, it is important to document and understand the relationship between this military platform that saw limited action and a small Texas town that had a similarly short period of significance to train the pilots who flew the aircraft.
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Identifying Breast Cancer Disparities in the African-American Community Using a Mixed Methods Approach

Identifying Breast Cancer Disparities in the African-American Community Using a Mixed Methods Approach

Date: May 2016
Creator: Morrissey, Natalie Noel
Description: Utilizing a mixed methods approach in assessing cities and metropolitan areas with the highest rates of breast cancer disparities in African-American communities, this study presents the Affiliate perspective of the Susan G. Komen non-profit organization in combination with available socioeconomic data and academic literature. Analyzed through an anthropological lens, qualitative and quantitative data illuminate the lived experiences and dynamic circumstances in which breast cancer disparities are disproportionately experienced in 21 of the nation’s populations of African-Americans. Two main recommendations arose from this research: prioritization of granting to activities such as patient navigation, usage of patient narrative messaging, community-based participatory research methods of program development and implementation, mobile mammography delivery, usage of lay health educators, and self-advocacy education to alleviate barriers to healthcare and supplementation of the current educational activities of the Komen Affiliates through program sharing and leverage of current assets with consideration of current Affiliate capacity. These recommendations may help in alleviating breast cancer disparities present in African-American communities with the highest levels of disparities in the nation.
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Understanding the Culture of Giving among Utility Fuel Fund Donors in Southern California

Understanding the Culture of Giving among Utility Fuel Fund Donors in Southern California

Date: May 2016
Creator: Sauer, Ashley
Description: The Energy Assistance Fund (EAF) is a voluntary, nonprofit fuel fund that provides grants to income qualified utility customers in an effort to help those customers avoid electricity service disconnection. The administering utility and the energy industry as a whole is undergoing transformative change, resulting in a projected decrease of fundraising capacity for EAF among its most substantial donor pool - utility shareholders and employees. Utility customers represent a small percentage of EAF donors, despite the significant size of the customer base. Through a series of ethnographic interviews and secondary research, this thesis seeks to understand the demographics and motivations of utility customers who donate to EAF in order to help improve EAF’s fundraising strategy and donor solicitations to eventually grow customer donations. The goal of EAF is to maintain or grow donations from 2014 levels so the Fund can continue to serve income qualified customers facing energy poverty. This thesis provides a contextual review of fuel funds; challenges faced by the energy and utility industry; the politics and culture of energy; as well as nonprofit sector fundraising challenges and cultures/motivations of giving. This thesis includes client deliverables such as thick description of donor motivation, motivation themes and a donor ...
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"Deborah": The Creation of a Chamber Oratorio in One Act

"Deborah": The Creation of a Chamber Oratorio in One Act

Date: May 2016
Creator: Mixter, Mary
Description: In comparing oratorio traits across history, three aspects of oratorio were found to be particularly applicable to the creation of "Deborah: A Chamber Oratorio in One Act." These aspects were: the selection of topic and the creation or adaptation of text; the differences between recitative and aria, in form and function; and the level of stylistic diversity within a given work.
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An exploration of the word2vec algorithm: Creating a vector representation of a language vocabulary that encodes meaning and usage patterns in the vector space structure.

An exploration of the word2vec algorithm: Creating a vector representation of a language vocabulary that encodes meaning and usage patterns in the vector space structure.

Date: May 2016
Creator: Le, Thu Anh
Description: This thesis is an exloration and exposition of a highly efficient shallow neural network algorithm called word2vec, which was developed by T. Mikolov et al. in order to create vector representations of a language vocabulary such that information about the meaning and usage of the vocabulary words is encoded in the vector space structure. Chapter 1 introduces natural language processing, vector representations of language vocabularies, and the word2vec algorithm. Chapter 2 reviews the basic mathematical theory of deterministic convex optimization. Chapter 3 provides background on some concepts from computer science that are used in the word2vec algorithm: Huffman trees, neural networks, and binary cross-entropy. Chapter 4 provides a detailed discussion of the word2vec algorithm itself and includes a discussion of continuous bag of words, skip-gram, hierarchical softmax, and negative sampling. Finally, Chapter 5 explores some applications of vector representations: word categorization, analogy completion, and language translation assistance.
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"Deva Plus Dog"

"Deva Plus Dog"

Date: May 2016
Creator: Beavers, Hannah Michelle
Description: Deva Plus Dog is a look at the life of a teenage girl singularly devoted to the sport of dog agility. The film explores how relationships develop and evolve in the high stakes world of competition, and how an alternative lifestyle impacts a youth’s coming of age.
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Comment peut-on être Persane ou Péruvienne ? On le devient.

Comment peut-on être Persane ou Péruvienne ? On le devient.

Date: May 2016
Creator: Daucourt, Monica Hazan
Description: Cette analyse littéraire examine les parallèles entre les deux romans Lettres persanes de Montesquieu (1721) et Lettres d'une Péruvienne de Françoise de Graffigny (1747) en se concentrant sur le sort des femmes et leur rébellion contre la claustration. Leurs révoltes transformatrices révèlent une volonté qui refuse et puis transcende les barreaux de leur captivité pour vivre librement. La philosophie de Simone de Beauvoir (1908-1986) personnifie leurs luttes pour devenir et exister, ce qui se traduit par leur capacité de dévoiler leur vraie nature. Elles se battent contre le néant de leurs existences où elles ne peuvent que succomber aux contraintes imposées. Elles se battent pour se définir et pour devenir. Cependant, c'est Graffigny qui nous offre une réponse plus proto-féministe dépassant les paramètres masculins de la société. Son livre répond directement aux Lettres persanes pour créer une nouvelle femme iconoclaste qui transcende les barrières de la société pour se réinventer.
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Highly Stretchable Miniature Strain Sensor for Large Dynamic Strain Measurement

Highly Stretchable Miniature Strain Sensor for Large Dynamic Strain Measurement

Access: Use of this item is restricted to the UNT Community.
Date: May 2016
Creator: Yao, Shulong
Description: This thesis aims to develop a new type of highly stretchable strain sensor to measure large deformation of a specimen subjected to dynamic loading. The sensor was based on the piezo-resistive response of carbon nanotube(CNT)/polydimethysiloxane (PDMS) composites thin films, some nickel particles were added into the sensor composite to improve the sensor performance. The piezo-resistive response of CNT composite gives high frequency response in strain measurement, while the ultra-soft PDMS matrix provides high flexibility and ductility for large strain measuring large strain (up to 26%) with an excellent linearity and a fast frequency response under quasi-static test, the delay time for high strain rate test is just 30 μs. This stretchable strain sensor is also able to exhibit much higher sensitivities, with a gauge factor of as high as 80, than conventional foil strain gauges.
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'My Tattooed Mind'

'My Tattooed Mind'

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Date: May 2016
Creator: Mayo, Kaleb R
Description: This thesis features a collection of nonfiction essays.
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A Sequential Analysis of Therapist and Child Social Behavior Following a Conditioned Reinforcement Procedure

A Sequential Analysis of Therapist and Child Social Behavior Following a Conditioned Reinforcement Procedure

Date: May 2016
Creator: Cortez, Kristi Cathleen
Description: We conducted a contingency analysis to evaluate if a sequential relation between social initiations and positive social responses increased for both therapists and children with autism following a conditioned reinforcement procedure. Participants included child-therapist dyads, which were previously identified as having low rapport. These dyads were observed prior to and following an intervention designed to establish therapists' social behavior as a reinforcer. Sessions consisted of unstructured play between the therapist and child. Results from a Yule's Q analysis show that both the child and adult positive responding to the others' social initiations increased following the intervention. Findings highlight the reciprocal effects of therapist-child interactions as well as the effectiveness of establishing social attention as a reinforcer via an operant discrimination training procedure.
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Microstructural Phase Evolution In Laser Deposited Compositionally Graded Titanium-Chromium Alloys

Microstructural Phase Evolution In Laser Deposited Compositionally Graded Titanium-Chromium Alloys

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Date: May 2016
Creator: Thomas, Jonova
Description: A compositionally graded Ti-xCr (10≤x≤30 wt%) alloy has been fabricated using Laser Engineered Net Shaping (LENSTM) to study the microstructural phase evolution along a compositional gradient in both as-deposited and heat treated conditions (1000°C followed by furnace cooling or air cooling). The alloys were characterized by SEM BSE imaging, XRD, EBSD, TEM and micro-hardness measurements to determine processing-structure-property relations. For the as-deposited alloy, α-Ti, β-Ti, and TiCr2 (C15 Laves) phases exist in varying phase fractions, which were influential in determining hardness values. With the furnace cooled alloy, there was more homogeneous nucleation of α phase throughout the sample with a larger phase fraction of TiCr2 resulting in increased hardness values. When compared to the air cooled alloy, there was absence of wide scale nucleation of α phase and formation of ω phase within the β phase due to the quicker cooling from elevated temperature. At lower concentrations of Cr, the kinetics resulted in a diffusionless phase transformation of ω phase with increased hardness and a lower phase fraction of TiCr2. In contrast at higher Cr concentrations, α phase separation reaction occurs where the β phase is spinodally decomposed to Cr solute-lean β1 and solute-rich β2 resulting in reduced hardness.
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Medical comorbidity in the course of bipolar disorder.

Medical comorbidity in the course of bipolar disorder.

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Date: May 2016
Creator: Smith, Patrick M
Description: Bipolar disorder is a serious illness affecting approximately 2-4% of the population and is one of the world’s leading causes of disability. In individuals with bipolar disorder, medical comorbidity associated with cardiovascular, respiratory and endocrine disorders is related to increased rates of mortality. Recent updates to multi-system inflammatory related conceptualizations of bipolar disorder focus on the unique power that medical illness and biological processes may play as factors associated with course and outcome in bipolar disorder. The current study examined medical comorbidity and its associations with various demographic and psychological variables in individuals with bipolar disorder, schizophrenia, and major depressive disorder with psychotic features followed for 10 years from their first hospital admission. When compared to an age, gender and race-matched control sample from the population, those with bipolar disorder had significantly higher medical comorbidity across a range of medical diagnoses both at 6 months and 10 years after first hospital admission. Ten years following initial hospitalization, individuals in all three diagnostic groups reported increased rates of diabetes (OR: 2.0 – 3.7), stroke (OR: 4.6 – 7.0) and asthma (OR: 1.9 - 3.1), and individuals with bipolar disorder reported increased rates of cancer (OR = 2.1). A number of psychological ...
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Mujeres sumisas, mujeres transgresoras en el siglo XIX español: una aproximacion a la obra de Francisca Navarro y Joaquina Garcia Balmaseda

Mujeres sumisas, mujeres transgresoras en el siglo XIX español: una aproximacion a la obra de Francisca Navarro y Joaquina Garcia Balmaseda

Date: May 2016
Creator: Zaera, Isabel Maria
Description: This research discusses the changing role of women in Spanish society during the nineteenth century through the works of Francisca Navarro and Joaquina Garcia Balmaseda. The thesis shows the break with the traditional image of the "angel del hogar" and the gradual incorporation of the social changes affecting women which were reflected in the female protagonists of the comedies written by such playwrights. By reading theoretical texts of the emerging feminist theory and through analysis of the main female characters, this study examines the changes regarding the established canon and its own evolution within the nineteenth century, from the works of a pioneer like Francisca Navarro in the first third of the century to those of Joaquina Gracia Balmaseda towards the end of it.
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A New Lacunarity Analysis Add-In for ArcGIS

A New Lacunarity Analysis Add-In for ArcGIS

Date: May 2016
Creator: Huang, Pu
Description: This thesis introduces a new lacunarity analysis add-in for ArcGIS
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Performance Evaluation of UNT Apogee Stadium Wind Turbines

Performance Evaluation of UNT Apogee Stadium Wind Turbines

Date: May 2016
Creator: Mccary, William Donald
Description: The following report chronicles the University of North Texas Wind Turbine Project at Apogee Stadium. The timeline of events will include the feasibility study conducted by and for the university, grant awards from the Texas State Energy Conservation Office to fund the project, and a three-year sample of real time performance data since installation. The purpose of this case study is to compare the energy generation estimates by various stakeholders to the measured energy generation using a new but uniform performance relationship. In order to optimize energy generation in wind turbine generator systems, the most common wind speeds measured at the site should also be the most efficient wind speeds at which the wind turbine can convert the kinetic energy in the wind into mechanical energy and ultimately electrical energy. The tool used to convey this relationship will be a figure plotting the wind speed profile against the efficiency curve of the wind turbine. Applying this relationship tool to the UNT Apogee Stadium wind turbines provided valuable results. The most common wind speeds at Apogee Stadium are not the most efficient wind speed for the turbine. Also, the most common wind speeds were near the lower limit of the wind ...
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Commercial Diplomacy: The Berlin-Baghdad Railway and Its Peaceful Effects on Pre-World War I Anglo-German Relations

Commercial Diplomacy: The Berlin-Baghdad Railway and Its Peaceful Effects on Pre-World War I Anglo-German Relations

Date: May 2016
Creator: Bukaty, Ryan Michael
Description: Slated as an economic outlet for Germany, the Baghdad Railway was designed to funnel political influence into the strategically viable regions of the Near East. The Railway was also designed to enrich Germany's coffers with natural resources with natural resources and trade with the Ottomans, their subjects, and their port cities... Over time, the Railway became the only significant route for Germany to reach its "place in the sun," and what began as an international enterprise escalated into a bid for diplomatic influence in the waning Ottoman Empire.
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Online Pornography and Its Effects on the Behavior of College Students

Online Pornography and Its Effects on the Behavior of College Students

Date: May 2016
Creator: Hassell, Michelle Stefanie
Description: The primary goal of this study was to investigate the habits of college students who use pornography. The study was designed to collect data on the use of online pornography by college students. Through the use of an online survey, the study collected general demographic data and data on the frequency with which students used online pornography. The study also collected data on the general attitudes of college students towards online pornography. Participants consisted of students enrolled at the University of North Texas during the Spring 2016 semester. The participants of the study were contacted by an email requesting the student to respond to an online anonymous survey regarding their use of online pornography. The survey consisted of thirty questions and statements, primarily utilizing a five point Likert scale. Analysis of the data collected as well as a discussion of the findings are included.
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Innovative Cold-Formed Steel Shear Walls with Corrugated Steel Sheathing

Innovative Cold-Formed Steel Shear Walls with Corrugated Steel Sheathing

Date: May 2016
Creator: Mahdavian, Mahsa
Description: This thesis presents two major sections with the objective of introducing a new cold-formed steel (CFS) shear wall system with corrugated steel sheathings. The work shown herein includes the development of an optimal shear wall system as well as an optimal slit configuration for the CFS corrugated sheathings which result in a CFS shear wall with high ductility, high strength, high stiffness and overall high performance. The conclusion is based on the results of 36 full-scale shear wall tests performed in the structural laboratory of the University of North Texas. A variety of shear walls were the subject of this research to make further discussions and conclusions based on different sheathing materials, slit configurations, wall configurations, sheathing connection methods, wall dimensions, shear wall member thicknesses, and etc. The walls were subject to cyclic (CUREE protocol) lateral loading to study their deformations and structural performances. The optimal sit configuration for CFS shear walls with corrugated steel sheathings was found to be 12×2 in. vertical slits in 6 rows. The failure mode observed in this shear wall system was the connection failure between the sheathing and the framing members. Also, most of the shear walls tested displayed local buckling of the chord ...
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Manhood in Spain: Feminine Perspectives of Masculinity in the Seventeenth Century

Manhood in Spain: Feminine Perspectives of Masculinity in the Seventeenth Century

Date: May 2016
Creator: Gomez, Clemente
Description: The question of decline in the historiography of seventeenth-century Spain originally included socio-economic analyses that determined the decline of Spain was an economic recession. Eventually, the historiographical debate shifted to include cultural elements of seventeenth-century Spanish society. Gender within the context of decline provides further insight into how the deterioration of the Spanish economy and the deterioration of Spanish political power in Europe affected Spanish self-perception. The prolific Spanish women writers, in addition, featured their points of view on manhood in their works and created a model of masculinity known as virtuous masculinity. They expected Spanish men to perform their masculine duties as protectors and providers both in public and in private. Seventeenth-century decline influenced how women viewed masculinity. Their new model of masculinity was based on ideas that male authors had developed, but went further by emphasizing men treating their wives well.
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Implementation of an Unmanned Aerial Vehicle for New Generation Peterbilt Trucks

Implementation of an Unmanned Aerial Vehicle for New Generation Peterbilt Trucks

Date: May 2016
Creator: Srinivasan K, Venkatesh
Description: As science and technology continue to advance, innovative developments in transportation can enhance product safety and security for the benefit and welfare of society. The federal government requires every commercial truck to be inspected before each trip. This pre-trip inspection ensures the safe mechanical condition of each vehicle before it is used. An Unmanned Aerial Vehicle (UAV) could be used to provide an automated inspection, thus reducing driver workload, inspection costs and time while increasing inspection accuracy. This thesis develops a primary component of the algorithm that is required to implement UAV pre-trip inspections for commercial trucks using an android-based application. Specifically, this thesis provides foundational work of providing stable height control in an outdoor environment using a laser sensor and an android flight control application that includes take-off, landing, throttle control, and real-time video transmission. The height algorithm developed is the core of this thesis project. Phantom 2 Vision+ uses a pressure sensor to calculate the altitude of the drone for height stabilization. However, these altitude readings do not provide the precision required for this project. Rather, the goal of autonomously controlling height with great precision necessitated the use of a laser rangefinder sensor in the development of the ...
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