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A Further Evaluation of Individual and Synthesized Contingencies within Functional Analysis Methods

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A functional analysis (FA) is the most commonly used assessment methodology for identifying maintaining variables influencing problem behavior. However, if an FA does not produce clear differentiation, researchers and practitioners often then modify procedures to include additional individualized variables. The interview-informed synthesized contingency analysis (IISCA) provides a marked departure from FA methodology and aims to include individualized factors at the initiation of the assessment in order to more rapidly produce differentiation and clear results. We sought to further evaluate and compare the outcomes of two different functional analysis methods: the single-contingency functional analysis (FA) and the interview-informed synthesized contingency analysis (IISCA) to determine the function of problem behavior and evaluate the subsequent function-based treatment determined from the functional analysis results with two children diagnosed with autism spectrum disorder (ASD). Both participants engaged in problem behavior maintained by single-contingencies of reinforcement identified within the single-contingency FA and emphasized by the effectiveness of each single-contingency function-based treatment.
Date: May 2019
Creator: Hendryx, Maggie
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Looking for Quantitative and Qualitative Measures of Teaching Interactions: A Preliminary Analysis (open access)

Looking for Quantitative and Qualitative Measures of Teaching Interactions: A Preliminary Analysis

Indicators of quality early intensive behavioral intervention (EIBI) include comprehensive interventions, adequately trained staff, high rates of effective instruction delivery, happy interactions between children and their teachers, and socially valid outcomes. When these are in place, high quality EIBI is more likely to increase progress that children with autism make during treatment. When not in place, progress is not as likely, as rapid, or as meaningful. To date, there is limited research regarding the correlation between these indicators of high-quality EIBI and the degree to which their effects are meaningful to direct consumers. The purpose of this methodological study was to compare direct, quantitative measures of teaching interactions (child initiations, teacher initiations, child affect, teacher affect) with qualitative measures (stakeholder ratings of teacher effectiveness, amount of opportunities for interaction and interest in the child) of teaching interactions to determine what sets the occasion for expert stakeholders to describe a teaching interaction as effective, quality therapy.
Date: May 2019
Creator: Weir, Jade R
Object Type: Thesis or Dissertation
System: The UNT Digital Library
"A Very Fine Piece of Writing": Parnell and the Joycean Text, 1905-1922 (open access)

"A Very Fine Piece of Writing": Parnell and the Joycean Text, 1905-1922

Charles Stewart Parnell was James Joyce's most significant political influence to a degree that has yet to be fully acknowledged or explored. This thesis proposes a "theory of Parnell" in Joyce's works up to the end of Ulysses, arguing that close attention to Parnell's evolution points to a significant shift in the evolution of Joyce's literary forms. In Joyce's juvenilia, political writings, and early fiction, Parnell always appears with a heroic, even Messianic, cast, which the most significant moments in the fiction pair with a strict adherence to dramatic forms. However, significant moments in both "Ivy Day in the Committee Room" and A Portrait of the Artist as a Young Man lay the groundwork for stylistic and representative transformations in Ulysses. In that novel, the myth of Parnell is deflated, even as Joyce appropriates its most essential qualities in the development of his panoply of styles. Episodes from "Telemachus" to "Wandering Rocks" critically examine the myth of Parnell even as they link it with the constraints of dramatic forms. Later episodes, most notably "Cyclops," "Circe," and "Eumaeus" attempt to make use of elements of "Parnellite" style, training a community of readers in acts of collective imagination that keep the Parnellite …
Date: May 2019
Creator: Smith, Benjamin J.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
The Civilian Conservation Corps in Big Bend National Park (open access)

The Civilian Conservation Corps in Big Bend National Park

During the New Deal, the Civilian Conservation Corps (CCC) put young men to work in state and national parks across the United States. One of such parks, Big Bend National Park, is the focus of this study. The CCC had two camps within the park, one from 1934 to 1937 and another from 1940 to 1942. During their time in Big Bend, the CCC constructed many projects including a road, trails, cabins, and other various structures. The purpose of this study is to delineate the role of the CCC in creating Big Bend National Park and the experience of the CCC during their time in the Big Bend camp. This study determines the role of the CCC through a discussion of the planning done by the CCC for Big Bend National Park and the work completed by the CCC in the park. In doing so, it argues that the CCC played a substantial and significant role in the development and character of the park. This study works to understand the experience of the CCC in Big Bend through a discussion of education, safety, and an investigation of a commanding officer. Through this discussion, the role of the federal government and …
Date: May 2019
Creator: Jackson, Kimberly
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Exploration of Genome Length, Burst Time, and Burst Size of  Streptomyces griseus Bacteriophages (open access)

Exploration of Genome Length, Burst Time, and Burst Size of Streptomyces griseus Bacteriophages

Since phages use the host resources to replicate themselves after infection, the different sizes of the phage genome should influence the replication rate. We, therefore, hypothesized that the smaller genomes should burst the cell faster than the larger ones. As well, the shorter genomes would have greater burst sizes because they should replicate faster. Here, we obtained 16 phages of various genome length. All phages were isolated on Streptomyces griseus and available in our phage bank at the University of North Texas. We performed one-step growth studies for the 16 phages, as well as determined the host doubling time from its growth curve. The results show that S. griseus grown in nutrient broth has a doubling time of 5 hours and 22 minutes. This doubling time is used as a guideline for the phage growth studies. Because the filamentous nature of the host caused several difficulties during the experiment, we isolated single cells by sonication and centrifugation. After the cell number was determined by viable cell count, the cells were infected with each type of phage using a multiplicity of infection (MOI) of 0.5. The results show that phages' burst times range between 45 (±0, standard error) and 420 (±30) …
Date: May 2019
Creator: Maneekul, Jindanuch
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Evaluating the Efficacy of Engagement Journalism in Local News: An Ethnographic Study of the Dallas Morning News (open access)

Evaluating the Efficacy of Engagement Journalism in Local News: An Ethnographic Study of the Dallas Morning News

The Dallas Morning News is a leader in using engagement journalism to increase and retain digital subscribers. This ethnography examined the efficacy of the engagement journalism work by the News in rebuilding trust and forming relationships with its audience. This research is exceptionally timely as more newsrooms are erecting paywalls to their content and asking their audiences to offer monetary support in exchange for greater access and engagement by journalists. This work is examined through two mass communications theories: functionalism, which says a society can be viewed like an ecosystem as a "system in balance" consisting of complex sets of interrelated activities, each of which supports the others in maintaining the system as a whole; and the dual responsibility model, which says that companies should operate in the best interests of all in the community who depend on them, not only those who benefit financially. Additionally, the work is considered from a human-interaction design standpoint to evaluate whether the News has created affordances that enable the journalists and the readers to communicate, and whether the journalists are effectively practicing service design when publishing news and information for the audience.
Date: May 2019
Creator: Wise, Hannah Marie
Object Type: Thesis or Dissertation
System: The UNT Digital Library
The Victim-Offender Overlap in Intimate Partner Violence: Considering the Role of Self-Control (open access)

The Victim-Offender Overlap in Intimate Partner Violence: Considering the Role of Self-Control

While a growing body of literature in the field of criminal justice documents the relationship between victimization and offending, only recently has this knowledge been applied to the study of intimate partner violence (IPV). Accordingly, questions remain with regard to the theoretical origins of mutual violence between intimates. In an effort to fill this void in the literature, the current study examines the etiology of moderate forms of mutual IPV, specifically assessing self-control theory's applicability to the victim-offender overlap in IPV. Data were obtained from Waves I and IV of the National Longitudinal Study of Adolescent to Adult Health (Add Health) to investigate whether low self-control at Wave I predicts IPV victimization, IPV offending, or both IPV victimization and offending at Wave IV. The present study extends prior literature examining the role of self-control in IPV by (1) investigating the influence of self-control on the victim-offender overlap in IPV, (2) using longitudinal data, and (3) utilizing a sample of U.S. adults ages 24 to 33. While low self-control was found to significantly predict IPV offending and the overlap in IPV victimization and offending, low self-control failed to significantly predict IPV victimization. Policy implications, study limitations, and directions for future research …
Date: May 2019
Creator: Spivey, Emily
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Bouncing Back: Resilience as a Moderator between Aggression and Depression in Older Gay Men and Lesbians Group Differences (open access)

Bouncing Back: Resilience as a Moderator between Aggression and Depression in Older Gay Men and Lesbians Group Differences

Older gay men and lesbians may be at greater risk for depression than older sexual majority adults due to a lifetime of sexual minority stress. We hypothesize that aggression and being single are positively associated with depression. Resilience is negatively associated with depression. Aggression, being single and resilience account for a significant proportion of variance in depression. Resilience moderates the relationship between aggression and depression. Significant differences between older gay men and older lesbians' aggression, resilience and depression scores exist. For our older gay men and lesbian combined group, a moderation analysis indicated that in addition to aggression and resilience, being single significantly predicted depression accounting for approximately 57% of the variance in depression. Furthermore, resilience significantly moderated the relationship between aggression and depression in our model of older gay men and lesbians. For our older gay men-only group a moderation analysis (indicated that and resilience significantly predicted depression accounting for approximately 57% of the variance in depression. Furthermore, resilience significantly moderated the relationship between aggression and depression in our model, in our sample of older gay men. Four our lesbian-only group a moderation analysis indicated that being single and resilience significantly predicted depression accounting for approximately 54% of the …
Date: May 2019
Creator: Griggs, Tosha
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Sing Rāga, Embody Bhāva: The Way of Being Rasa (open access)

Sing Rāga, Embody Bhāva: The Way of Being Rasa

The rasa theory of Indian aesthetics is concerned with the nature of the genesis of emotions and their corresponding experiences, as well as the condition of being in and experiencing the aesthetic world. According to the Indian aesthetic theory, rasa ("juice" or "essence," something that is savored, that is tasted) is an embodied aesthetic experienced through an artistic performance. In this thesis, I have investigated how the aesthetics of rasa philosophy account for creative presence and its experiences in Karnatik vocal performances. Beyond the facets of grammar, Karnatik rāga performance signifies a deeper ontological meaning as a way to experience rasa, idiomatically termed as rāga-rasa by South Indian rāga practitioners. A vocal performance of a rāga ideally depends on a singer's embodied experience of rāga and rāga-bhāva (emotive expression of rāga), as much as it does on his/her theoretical knowledge and skillset of a rāga's svaras (scale degrees), gamakas (ornamentation), lakṣhaṇās (emblematic phrases), and so on. Reflecting on my own experience of being a Karnatik student and performer for the last two decades, participant observation, interviews, and analysis of Indian aesthetic theory of rasa, I propose a way of understanding that to sing rāga is to embody bhāva opening the …
Date: May 2019
Creator: Krishnamurthy, Thanmayee
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Two-Dimensional Sonata Form as Methodology: Understanding Sonata-Variation Hybrids through a Two-Dimensional Lens (open access)

Two-Dimensional Sonata Form as Methodology: Understanding Sonata-Variation Hybrids through a Two-Dimensional Lens

One of the difficulties of nineteenth-century form studies is ambiguity in ascertaining which formal types are at work and in what ways. This can be an especially difficult problem when multiple formal types seem to influence the construction of a single composition. Drawing on some recent innovations in form studies proposed by Steven Vande Moortele, Janet Schmalfeldt, and Caitlin Martinkus, I first develop a set of analytical tools specifically made for the analysis of sonata/variation formal hybrids. I then refine these tools by applying them to the analysis of two pieces. Chopin's Fourth Piano Ballade can be understood from this perspective as primarily following the broad outlines of a sonata form, but with important influences from the recursive structures of variation forms; Franck's Symphonic Variations, on the other hand, are better viewed as engaging most of all with multiple variation-form paradigms and overlaying them with some of the rhetorical and formal structures of sonata forms. I conclude with a brief speculation on some further, more general applications of my methodology.
Date: May 2019
Creator: Falterman, David
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Establishing Appropriate Toileting Behavior in an Adult Female with Developmental Disabilities and Severe Self-Injurious Behavior (open access)

Establishing Appropriate Toileting Behavior in an Adult Female with Developmental Disabilities and Severe Self-Injurious Behavior

The participant was a 52 year-old woman, diagnosed with a profound intellectual disability, who engaged in high rates of severe self-injurious behaviors (SIB) predominantly in the forms of head banging and head hitting. A series of analyses and interventions was implemented to establish appropriate toileting behavior in the natural environment. Treatment consisted of conjugate reinforcement for optimal toilet positioning with the absence of SIB, episodic positive reinforcement of eliminating in the toilet, and programed generalization across environments and staff. Results showed the maintenance of optimal toilet positioning, decrease in SIB (under 1 instance per min), and appropriate eliminating in 96.3% of all available sessions. Direct support staff were trained to implement the program with 100% fidelity.
Date: May 2019
Creator: Bayliss, Kathleen
Object Type: Thesis or Dissertation
System: The UNT Digital Library
"Life Holders" (open access)

"Life Holders"

Life Holders is a collection of personal essays reflecting on my interactions with others concerning my military service.
Date: May 2019
Creator: Irvin, William Ross
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Independence of Mania and Depression across 4 Years in Bipolar Disorder

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If mania and depression are part of the same pathological processes, one would predict that episodes of one prospectively increase the odds of episodes of the other. The aim of the present study was to test this hypothesis. For comparison purposes, their relationship was contrasted to the relationship between mania and periods of psychosis. Exploratory analyses also tested the degree to which episodes of each occur with greater frequency over time (i.e., kindling). Participants for the present study came from the Suffolk County Mental Health Project (N = 628), a study of first-admission patients with psychosis. Of these participants, 144 met diagnostic criteria for bipolar I disorder and were analyzed for the current study. Results indicated that mania in a given month predicted depression the following month, even after controlling for other symptoms. The reverse, however, was not the case. Mania and psychosis, in contrast, were found to be robust predictors of one another from month to month. Effects were not due to treatment or demographic differences. These findings provide evidence that mania and depression are weakly related. In contrast, mania and psychosis are more closely linked. Findings are consistent with suggestions that psychiatric nosology regroup mania more closely with …
Date: May 2019
Creator: Bennett, Charles B.
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Animals Alive and Dead

Access: Use of this item is restricted to the UNT Community
Collection of poems.
Date: May 2019
Creator: Tieger, Leah
Object Type: Thesis or Dissertation
System: The UNT Digital Library

The Effect of Trauma Experiences and PTSD Severity on Positive Memory Recall and Memory Phenomenology

Access: Use of this item is restricted to the UNT Community
Positive memories play an important role in the etiology and maintenance of posttraumatic stress disorder (PTSD). Additionally, there are potential clinical benefits of recalling positive memories on affect, cognitions, and behaviors. However, most research/clinical work has focused on the role of traumatic memories in PTSD's symptomatology and treatment. The current study examined positive memory recall difficulties and positive memory phenomenology among 185 trauma-exposed individuals with varying PTSD severity. Participants completed the Life Events Checklist for DSM-5, PTSD Checklist for DSM-5, Autobiographical Memory Test, Memory Experiences Questionnaire – Short Form, Ruminative Thought Style Questionnaire, Difficulties in Emotional Regulation Scale – Brief 16-Item Version, Difficulties in Emotional Regulation Scale – Positive Emotions, the Positive Affect subscale of the Affective Control Scale, and two items from the Pittsburg Sleep Quality Index. Results showed that (1) greater PTSD severity was a marginally significant predictor of fewer recalled positive memories; (2) greater positive emotional dysregulation predicted fewer recalled positive memories controlling for PTSD severity; and (3) increasing PTSD severity predicted more negative valence, less vividness, less coherence, less accessibility, less clear time perspective, fewer sensory details, and greater distancing ratings of the recalled positive memory, controlling for sleep quantity/quality. Such findings add to the PTSD-positive …
Date: May 2019
Creator: Dolan, Megan
Object Type: Thesis or Dissertation
System: The UNT Digital Library
News Framing and Social Media Responses to the Release of Boko Haram Female Captives (open access)

News Framing and Social Media Responses to the Release of Boko Haram Female Captives

This qualitative study sheds light on the framing of the sexual abuse of the Boko Haram's female captives sent to the internally displaced persons (IDP) camps and analyzes emotional themes from tweets focusing on the release of the Boko Haram's female victims, the Chibok girls. Six articles were chosen from BBC (a British news source), Punch (a Nigerian news source), and the New York Times (an American news source) to reveal the frames. In addition, 118 tweets were examined to address emotional tweets under #ourgirlsareback, #82chibokgirls, #chibokgirls82, and #chibokgirls. The findings discovered the presence of the human interest frame, conflict frame, responsibility frame, and a stereotype in the articles. The tweets showed positive common themes- joy, gratitude, and hope. Also, the tweets included conspiracy theories.
Date: May 2019
Creator: Omokore, Joy Oluwadamilola
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Universal Pre-K as a Vehicle for Reversing the Impact of Historic Racial Segregation in the United States (open access)

Universal Pre-K as a Vehicle for Reversing the Impact of Historic Racial Segregation in the United States

Not all children begin their educational journey on equal footing. The purpose of this study is to investigate how universal prekindergarten (UPK) can serve as a key to remedying issues surrounding educational inequity. In order to understand educational inequity, I dive into the history of neighborhood racial segregation in the United States, and how it led to our currently unjust system. Racial segregation, specifically city zoning laws, created racially separate neighborhoods that are still relatively homogenous to this day. In order to ascertain how UPK could combat these issues stemming from historic racial segregation, I evaluate programs in three states to highlight the approach to UPK that each has implemented: New York, Georgia, and Oklahoma. Program features in Oklahoma have produced high-quality standards and the program has reached a larger percentage of 4-year-olds. I discuss multiple dimensions of proposed education reform, particularly for students of color, including the culturally-situated nature of high-stakes testing and its inability to fully capture student and school progress. I propose a culturally empowering approach to UPK, situated within the Dallas community, as a solution to current educational inequity.
Date: May 2019
Creator: Bartley, Sarah
Object Type: Thesis or Dissertation
System: The UNT Digital Library
The Effects of Common and Uncommon Elements on the Emergence of Simple Discriminations (open access)

The Effects of Common and Uncommon Elements on the Emergence of Simple Discriminations

A computerized program was designed to test whether arranging a common element in two, otherwise independent, 2-term correlations (stimulus-stimulus and response-stimulus) would result in emergent simple discriminative-stimulus properties for the antecedent stimulus relative to an arrangement with no common elements programmed. Data from 8 adult participants in this experiment indicate that common element arrangements led to relatively high rates of responding in the presence of the putative discriminative stimulus and relatively low rates or no responding in the presence of the putative s-delta during testing in extinction. Conversely, the uncommon element arrangements produced no clear discriminative control. The current data reflect a comparison of arrangements across subjects. These data support Sidman's (2000) suggestion that common elements among contingencies are sufficient to produce stimulus classes and cause class mergers. The data also have implications for thinking about the mechanism by which and the conditions under which discriminative control develops. Finally, these data have the potential to inform the programming and implementation of reinforcement contingencies in applied settings.
Date: May 2019
Creator: Niland, Haven Sierra
Object Type: Thesis or Dissertation
System: The UNT Digital Library
The Sexual Victimization of Black College Women (open access)

The Sexual Victimization of Black College Women

Sexual victimization is a pervasive mental and physical health issue with overarching implications for university campuses and victim service providers alike. While a large expanse of research exists on sexual violence and the factors associated with victimization, less is known about the potentially unique experiences faced by Black college women in particular. Utilizing data collected by the National Longitudinal Study of Adolescent to Adult Health, this study examines the prevalence of college sexual victimization, levels of social support for victims and non-victims, intimate partner sexual victimization (IPSV), and the predictability of self-esteem on sexual victimization. In addition, comparisons are made between Black college women and their White counterparts. After conducting multiple t-tests and logistic regression analyses, results indicated that Black college women were more likely to experience IPSV than White college women, and Black college women received less social support following sexual victimization than Black non-victims. These findings can help in establishing more efficient and accessible assistance for victims.
Date: May 2019
Creator: Wilson, Hannah Caroline
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Quantile Regression Deep Q-Networks for Multi-Agent System Control

Access: Use of this item is restricted to the UNT Community
Training autonomous agents that are capable of performing their assigned job without fail is the ultimate goal of deep reinforcement learning. This thesis introduces a dueling Quantile Regression Deep Q-network, where the network learns the state value quantile function and advantage quantile function separately. With this network architecture the agent is able to learn to control simulated robots in the Gazebo simulator. Carefully crafted reward functions and state spaces must be designed for the agent to learn in complex non-stationary environments. When trained for only 100,000 timesteps, the agent is able reach asymptotic performance in environments with moving and stationary obstacles using only the data from the inertial measurement unit, LIDAR, and positional information. Through the use of transfer learning, the agents are also capable of formation control and flocking patterns. The performance of agents with frozen networks is improved through advice giving in Deep Q-networks by use of normalized Q-values and majority voting.
Date: May 2019
Creator: Howe, Dustin
Object Type: Thesis or Dissertation
System: The UNT Digital Library
An Assessment of Riparian Buffer Effectiveness in the Upper Hickory Creek Watershed: A GIS Approach Using the Riparian Buffer Delineation Equation (RBDE) and the Buffer Improvement Potential Percentage (BP) (open access)

An Assessment of Riparian Buffer Effectiveness in the Upper Hickory Creek Watershed: A GIS Approach Using the Riparian Buffer Delineation Equation (RBDE) and the Buffer Improvement Potential Percentage (BP)

As population increases and urbanization occurs, watershed management will be critical in the protection of water resources in North Central Texas. By 2040, Denton County will nearly double its 2010 population. The Upper Hickory Creek Watershed lies west of Denton and empties into Lake Lewisville. Lake Lewisville provides drinking water for Denton, Dallas, and other neighboring cities. Mitigation of non-point source pollutants as a result of urban and agricultural practices is essential to protecting Lake Lewisville water resources. A common best management practice used to mitigate pollutants is the protection of riparian ecotones that occupy river corridors; however, recent agricultural and urban practices are diminishing these ecosystems and their services. In this paper, the riparian buffer delineation equation (RBDE) is used to assess the current state of Upper Hickory Creek Watershed to aid in the monitoring of the riparian buffers along stream corridors. While the RBDE was used as pre-assessment tool for the riparian buffer effectiveness in the watershed, a new form of the equation was used to evaluate riparian buffer improvement potential (BP) in conjunction with Denton County parcel data to provide insights into buffer effectiveness and identify areas for improvement on a landowner scale.
Date: May 2019
Creator: Yesildirek, Monica Veale
Object Type: Thesis or Dissertation
System: The UNT Digital Library
The Poetry of Reality: Frederick Wiseman and the Theme of Time (open access)

The Poetry of Reality: Frederick Wiseman and the Theme of Time

Employing a textual analysis within an auteur theory framework, this thesis examines Frederick Wiseman's films At Berkeley (2013), National Gallery (2014), and Ex Libris (2017) and the different ways in which they reflect on the theme of time. The National Gallery, University of California at Berkeley, and the New York Public Library all share a fundamental common purpose: the preservation and circulation of "truth" through time. Whether it be artistic, scientific, or historical truth, these institutions act as cultural and historical safe-keepers for future generations. Wiseman explores these themes related to time and truth by juxtaposing oppositional binary motifs such as time/timelessness, progress/repetition, and reality/fiction. These are also Wiseman's most self-reflexive films, acting as a reflection on his past filmmaking career as well as a meditation on the value these films might have for future generations. Finally, Wiseman's reflection on the nature of time through these films are connected to the ideas of French philosopher Henri Bergson.
Date: May 2019
Creator: Wahlert, Blake Jorgensen
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Mesh Networking for Inter-UAV Communications (open access)

Mesh Networking for Inter-UAV Communications

Unmanned aerial systems (UASs) have a great potential to enhanced situational awareness in public safety operations. Many UASs operating in the same airspace can cause mid-air collisions. NASA and the FAA are developing a UAS traffic management (UTM) system, which could be used in public safety operations to manage the UAS airspace. UTM relies on an existing communication backhaul, however natural disasters may disrupt existing communications infrastructure or occur in areas where no backhaul exists. This thesis outlines a robust communications alternative that interfaces a fleet of UASs with a UTM service supplier (USS) over a mesh network. Additionally, this thesis outlines an algorithm for vehicle-to-vehicle discovery and communication over the mesh network.
Date: May 2019
Creator: Walton, Michael Tanner
Object Type: Thesis or Dissertation
System: The UNT Digital Library
The Geography of Partial-Market Exits: Applying Geospatial and Econometric Methods to Analyze 2017 Department Store Closures in the United States (open access)

The Geography of Partial-Market Exits: Applying Geospatial and Econometric Methods to Analyze 2017 Department Store Closures in the United States

Many factors have prompted the adoption of partial-market exit strategies in retail as a means of reducing cost and minimizing risk. These mass closures have become more frequent in recent years. Marketers and economists have offered explanations for these closures linked to the rise of e-commerce, the real estate cycle and general changes in consumer taste. The research here marks an attempt to apply geospatial and econometric methods to better understand what factors explain the spatial variation of these closures across the United States. Specifically, the analysis examines the store networks of Sears, J.C. Penney and Macy's- large, established department stores that, collectively, announced over 100 closures at the beginning of 2017. By treating each store as a unit of observation, and a closure as a limited dependent variable, this analysis will attempt to quantify the relationship between place-specific factors and retail closures using Probit modeling. This application of modeling marks a deviation from traditional analyses in retail geography which, up until the early 2000s, have focused almost entirely on store development and growth. The results reveal patterns of spatial clustering of closures in and around the Rust Belt and demonstrate the strong negative effect of competitive agglomeration on the …
Date: May 2019
Creator: Reed, Connor
Object Type: Thesis or Dissertation
System: The UNT Digital Library