Digital Commons Network^™

Low Level Lead Exposure And Inflammatory Markers In The Brains Of C57bl/6j Mice, Miguel A. Cervantes

Open Access Theses & Dissertations

Background and Significance: Prior studies have indicated that early chronic low-level lead exposure may be associated with adverse effects on motor and cognitive functions. The mechanisms by which low-level lead affects brain function are unknown. Objectives: The current study aimed to (1) determine whether early chronic low-level lead exposure altered the expression of pro- or ant-inflammatory cytokines and markers of oxidative stress in mouse brain studied at two ages, pre-adolescence (PND 28) and early adulthood (PND 40); and (2) in the same pre-adolescent and early adulthood mice, compare and contrast the levels of pro- or ant-inflammatory markers in three brain …

Parental Perception On The Impact Of Continued Use Of Baby Sign On Stress And Parent-Child Interaction: Follow-Up Survey One Year Post Hoc Of A Baby Sign Workshop, Brenda G. Compean

Open Access Theses & Dissertations

Introduction: Past research has indicated that teaching baby sign language to infants can be stressful for parents. Thus, a previous study to test this assertion was conducted. A baby sign workshop was conducted and consisted of teaching the parents approximately 200 signs and information on implementation. Results indicated that parents did not report stress as a result of using baby sign with their children. The current case study administered a modified version of the baby sign workshop survey one year post hoc. Purpose: To observe continued use of baby sign, as well as parental perception of the impact of baby …

Influence Of Stress On Substance Use: Age-Associated Variability In Molecular And Behavioral Outcomes, Christina Elizabeth D'Arcy

Open Access Theses & Dissertations

Stress introduces a number of neurological and neurohormonal changes in response to a number of stimuli, and can influence our relationship to rewarding experiences. As such, it holds the potential of promoting vulnerability to addiction to substances such as methamphetamine. While methamphetamine use and abuse has been steadily declining, the fact remains that it and closely related drugs are used in the treatment of conditions such as narcolepsy, weight loss, and attention deficit disorder. In an effort to develop better patient assessment metrics to aid the physician in deciding a course of treatment, we ask the following questions: Do chronic …

Structural Organization Of The Connections Between Neurons Of The Paraventricular And Lateral Hypothalamic Regions In The Adult Male Rat, Berenise De Haro

Open Access Theses & Dissertations

The hypothalamus is a major integrator of homeostatic signals in the brain; within the hypothalamus, there are sub-regions with specific roles in regulating energy balance. For example, the lateral hypothalamic area (LHA) has been classically associated with feeding behaviors, and contains two major orexigenic cell populations expressing the neuropeptides melanin concentrating hormone (MCH) or hypocretin 1/orexin A (H/O). Similarly, the paraventricular nucleus of the hypothalamus (PVH) integrates information to mediate neuroendocrine and autonomic responses related to ingestive behaviors. The PVH has also been implicated directly in the control of feeding. However, the precise structural and functional interactions between these two …

Serine Palmitoyltransferase And Giardial Encystation, Monica Delgado

Open Access Theses & Dissertations

Giardia lamblia is a flagellated protozoan parasite responsible for chronic diarrheal disease in humans and animals. Giardia has minimal lipid synThesis machinery and the majority of its lipids are obtained from the small intestine of humans where the trophozoites colonize. Recent results from our laboratory indicate that sphingolipids (SLs) are also important for Giardia and they regulate encystation and cyst production. Only five SL genes are present in this parasite and they are differentially regulated during encystation. In my studies, I found that giardial serine palmitoyltransferase (gSPT) activity is upregulated in encysting cells, suggesting it might play an important role …

Quantifying Weathering Rates On Tropical Volcanic Basse-Terre Island, French Guadeloupe: Insights From U-Series Isotopes In Weathering Rinds, Jacqueline Engel

Open Access Theses & Dissertations

Weathering of volcanic rocks plays many important roles at Earth’s surface such as modifying landscapes, providing nutrients to soil, and regulating atmospheric CO2. U-series isotopes (e.g. 238U-234U-230Th and 232Th) have been established as a chronometer used to constrain the formation rates of weathering rinds in tropical island environments. Here, U-series isotopes and major element concentrations were analyzed in two basaltic-andesite weathering rinds collected from the Deshaies watershed located in the northern, relatively dry (mean annual precipitation (MAP) = 1800 mm) region of tropical Basse-Terre Island, Guadeloupe. The two clasts are referred to as clasts AN-14-7.5 and AN-14-7.6. Elemental mobility trends …

Re-Examining Resistance: Fan-Produced Queer Readings And Teen Wolf, Joshua J. Espinoza

Open Access Theses & Dissertations

MTV's popular television series, Teen Wolf (2011), has amassed a large online following of fans that create their own queer narratives through fan-fiction, subverting the show's hegemonic heteronormativity. Through a textual thematic analysis of Teen Wolf, this case study illustrates how online fandoms can subvert hegemony through queer readings of literary characters, resisting the dominant heteronormativity on network television. This article argues that rearticulating the showâ??s narratives into queer readings functions as a form of LGBT resistance, effectively counteracting the heteronormativity and hegemony portrayed on screen. This study examines how Teen Wolf approaches queer content, including homoeroticism and LGBT themes …

Ecological Features Of The Greater Earless Lizard, Cophosaurus Texanus, (Squamata: Phrynosomatidae) On Indio Mountains Research Station, Hudspeth County, Texas, Gabriela Franco

Open Access Theses & Dissertations

626 Cophosaurus texanus were captured on regular trips to Indio Mountains Research Station in Hudspeth County, Texas from August 2010 to November 2014. Mark-recapture methods using 81 pitfall traps and toe-clips for identification allowed for analyses of long-term trends. 291 adult females, 315 males, and 20 unsexed juveniles were recorded. A total of 180 independent recapture events were documented over the study period (44% females; 55% males). The greatest numbers of C. texanus were collected in 2011 (234), which was also the driest year of the four (6.77 cm), whereas 2014 was the wettest (34.95 cm), but had the second-most …

Characterization Of The Nodamura Virus Rna Dependent Rna Polymerase And Formation Of Rna Replication Complexes In Mammalian Cells, Vincent Ulysses Gant

Open Access Theses & Dissertations

Positive-strand RNA viruses amplify their genomes in membrane-bound structures associated with intracellular membranes and organelles called replication complexes (RCs). Here, we begin to elucidate mechanisms of Nodamura virus (NoV; family Nodaviridae) RC assembly. The literature reports that NoV-infected muscle tissue exhibits mitochondrial aggregation and rearrangement of mitochondrial structure, leading to disorganization of the muscle fibrils. However, the molecular basis for this pathogenesis and the role of mitochondria in NoV infection remained unclear until now. We tested the hypoThesis that NoV establishes RCs in association with mitochondria in cultured mammalian cells at physiological temperature. We used immunofluorescence confocal microscopy and biochemical …

Differences In Stress Biomarkers In Women With High And Low Stress Appraisal, Clarissa Sara Gomez

Open Access Theses & Dissertations

Measures of physiological biomarkers have been widely used in the field of stress research to explain how stress negatively impacts health outcomes. Women in particular have been shown to be more at risk for developing physiological and psychological stress-induced conditions (e.g., hypertension, depression) due to hormonal differences (Kirschbaum et al., 1992), but more importantly, because of their appraisal of stressful events (Schamus et al., 2008). Few studies however have examined whether womenâ??s stress appraisal is predictive of stress reactivity, as measured by stress biomarkers, during stressful events. The goal of this study was to examine whether stress appraisal predicted stress …

The Meteorological Conditions Affecting The Propagation Of Respiratory Diseases, Rosette Maria Gonzalez

Open Access Theses & Dissertations

Valley Fever, also known as Coccidioidomycosis, is endemic of the US Southwest. In 2012 this disease was the second most-reported disease in Arizona, according to the New Yorker January 2014 edition. The Paso Del Norte Region (PdN) is a semi-arid region with significant agricultural acreage and Valley Fever is known to be a threat in this region. It is our goal in this Thesis work to apply an existing PBL Height Program (e.g., Liu, et.al.) to the Paso Del Norte Region (PdN) to study the effect it has in the transmission of Valley Fever. Obtaining the PBLH as it evolves …

Fake Empire, Dennis Wilfredo Gonzalez

Open Access Theses & Dissertations

This a collection of short stories based in my experience as a Peruvian American Writer

Physical Engagement As A Way To Increase Emotional Rapport In Interactions With Embodied Conversational Agents, Ivan Gris Sepulveda

Open Access Theses & Dissertations

One of the major goals in research on embodied conversational agents (ECAs) is to increase the believability and perceived trustworthiness of agents. To improve the efficacy of the interaction between humans and ECAs, I focus on the development of rapport, which is a complex and extensive behavioral state of affinity, synchronicity, coordination and mutual understanding that is difficult to model, measure and interpret. I present our AGENT Framework and our ECA, Adriana, which is capable of speech recognition and gesture recognition over long periods of time. Our current system provides up to 60 minutes of human-ECA interaction in a jungle-survival …

Electrical Stimulation Uses Sodium Channel Dependent Depolarization To Produce Exocytotic-Like Dopamine Release And Rotational Behavior In Vivo, Alice Elaine Hernandez

Open Access Theses & Dissertations

The goal of this project was to establish Electrical Stimulation (ES) in combination with In Vivo Intracerebral Microdialysis (IVMCD) as a methodology to evoke exocytotic-like dopamine (DA) release. To provide evidence that ES mimics action potential-mediated DA exocytosis, we hypothesized that ES produces depolarization of the membrane potential that is dependent upon sodium (Na+) -channels to produce DA release concomitantly with rotational behavior. To test this, rats received electrode and cannulae implants along the medial forebrain bundle, which contains the DAergic nigrostriatal pathway, and a microdialysis probe at the striatum to undergo IVMCD testing. To begin, steady baseline DA levels …

The Effects Of A Sport-Related Concussion On The Motor Speech And The Motor Limb Movements: Examining Oral Diadochokinesis, Speech Rate, And Limb Tasks, Jessica Marie Hewitt

Open Access Theses & Dissertations

Background: Motor speech disorders, such as dysarthria, are a common sequelae reported after traumatic brain injuries. However, there is limited research on the effects of sport-related concussions (SRC) on motor speech disorders.

Aims: The current study aimed at replicating and extending a previous research study, Dolan (2013), conducted at the University of Texas at El Paso. In her study, Dolan (2013) incorporated and evaluated motor speech tasks: sequential motion rates, and motor limb tasks: movement execution initiation and finger repetition, in athletes following a sport-related concussion. The current study duplicates Dolanâ??s (2013) study. In addition, it investigates the effects of …

Communication Of Self And Cyberlife Through Avatars In Second Life Online Communities, Kyron Joseph

Open Access Theses & Dissertations

Virtual worlds are becoming more and more recognized for its social capabilities. It's making a splash on the global scale as the use for virtual worlds is surpassing the expected means of the creators. The purpose of this study is to investigate how users in the virtual world of Second Life identify themselves with fellow users through their Avatars through the theory of narrative identity. In the virtual world of Second Life, there are many different avenues that users can express themselves, through the narrative plot analysis these avenues will show the relation to the users and self.

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Keywords: …

Systematics Of The African River Frog Genus Amietia (Anura: Pyxicephalidae) From Eastern Democratic Republic Of The Congo, Thornton Robert Larson

Open Access Theses & Dissertations

The African river frog genus Amietia is found near rivers and other lentic water sources throughout central, eastern and southern Africa. Because the genus includes multiple morphologically conservative species, taxonomic studies of river frogs have been limited. We sampled 49 individuals of Amietia from multiple localities in and near the Albertine Rift (AR) of Burundi, Democratic Republic of the Congo and Uganda. We utilized single-gene (16S) and concatenated (12S, 16S, cytochrome b and RAG1) gene-tree analyses and coalescent species-tree analyses to construct phylogenetic trees. Two divergence dating approaches were used in BEAST, including secondary calibration points with 12S, 16S and …

Bounded Rationality In Decision Making Under Uncertainty: Towards Optimal Granularity, Joseph Anthony Lorkowski

Open Access Theses & Dissertations

Starting from well-known studies by Kahmenan and Tversky, researchers have found many examples when our decision making seems to be irrational. We show that this seemingly irrational decision making can be explained if we take into account that human abilities to process information are limited. As a result, instead of the exact values of different quantities, we operate with granules that contain these values. On several examples, we show that optimization under such granularity restriction indeed leads to observed human decision making. Thus, granularity helps explain seemingly irrational human decision making.

Similar arguments can be used to explain the success …

Exploratory Study Of Seasonal Indoor Bioaerosols And The Associated Health Outcomes In Low-Income Communities In El Paso, Texas, 2014, Eric Martinez

Open Access Theses & Dissertations

Introduction: Structural degradation, moisture levels, and building failures can influence poor indoor air quality and create a good environment for bioaerosols. People spend much of their time indoors and can potentially be exposed to these bioaerosols. Several studies have correlated exposures to high concentrations of bioaerosols to various health problems, severe allergies, asthma, or other respiratory illness. Objectives: The objectives of this study are to describe bioaerosol concentrations, meteorological factors, and health outcomes during the summer and fall seasons; characterize bioaerosols (bacteria and fungi) collected in low-income communities; compare bioaerosol concentrations by season; compare meteorological factors to bioaerosol concentrations by …

La Otra Frontera: Exiles, Engineering, And State Power In The Chiapan Borderlands, Aaron Margolis

Open Access Theses & Dissertations

This Dissertation examines the political, cultural, and economic history of the Chiapan borderlands from its political incorporation into the post-independence Mexican state in 1821 until the arrival of Guatemalan refugees in the 1980's. This history is explored through the directives, interactions, and policies of officials from Mexico City as the borderlands drifted in and out of the orbit of the priorities of the changing governments of independent Mexico.

A large part of the Dissertation examines how the post-revolutionary Mexican state re-discovered and conceptualized the borderlands as a both a threat to national security and a potential site of energy derived …

Pre-Service Elementary Teachers' Affective Dispositions Toward Mathematics, Benjamin R. Mcdermott

Open Access Theses & Dissertations

The purpose of this study was to measure and report pre-service elementary teachers' affective domain of productive disposition toward mathematics during the semester they were enrolled in a reform-based mathematics methods course. The study attempted to observe and report dynamic and enduring aspects of disposition as well as the perceived reasons for any changes, or lack thereof, in disposition. The rationale for focusing on disposition is related to Kilpatrick, Swafford, and Findell's (2001) inclusion of productive disposition as one of the five interdependent strands of the mathematical proficiency conceptual framework. Furthermore, it has been argued that dispositions develop at very …

A Positive Deviance Inquiry On Communicative Acts And Behaviors That Enable Working Mothers To Breastfeed, Jessica Molinar Munoz

Open Access Theses & Dissertations

The benefits of breastfeeding have been well documented for both mother and child. Breastfeeding provides optimal nutrition for an infant and includes decreased risk for numerous diseases and illnesses. However, there is evidence that when mothers return back to work from maternity leave, they often stop breastfeeding. The present research project utilizes the Positive Deviance approach to find working mothers who have successfully breastfed their children exclusively for six months and to determine what enables these mothers to continue to breastfeed past one year of birth while working full time. The purpose is to understand why some working mothers, who …

Re-Specifying The Sacred Values Scale, Adon Lee Neria

Open Access Theses & Dissertations

An object or value becomes sacred when a person feels compelled to protect and admire it. When a person holds a Sacred Value (SV) they are less likely to accept compromises, or "taboo tradeoffs," to that value and will behave less rationally to protect it from perceived slights. Though research on SV has replicated well, there has yet to be a popularized scale measuring it. A previous attempt at developing a multidimensional scale for measuring the degree to which a person holds any value as sacred was made that resulted in a 15-item measure. Though this version demonstrated good predictive …

Latina/O High School Students' Standpoint On Environmental Justice In A Border Community: A Phenomenological Study, Cynthia Christina Ontiveros

Open Access Theses & Dissertations

This qualitative research is a transcendental phenomenology seeking to understand Latin@ high school students’ perceptions and standpoints as they participated lessons that addressed border environmental justice issues in an underrepresented, marginalized community. Seven students from Borderland High School, enrolled in a senior level course, Environmental Science, participated in the study which focused on their experiences in an environmental justice air quality thematic unit built around the complex issues surrounding a local refinery, American Smelting and Refining Company (ASARCO). The study analyzed the meaning students made and their standpoints regarding the impact of the factory and its one-hundred year history polluting …

Rare Pride Campaigns: Evaluating Participatory Communication In Conservation Efforts Throughout Indonesia, Lauren Elizabeth Perez

Open Access Theses & Dissertations

Communication scholars who study international development and social change have found that if facilitators of social change hope to find positive, lasting solutions to complex social and environmental issues, they must incorporate more participatory approaches. However, even the practitioners with the most noble intentions oftentimes fall short of facilitating truly participatory practices because their strategies are the product of linear processes for evaluating the change context. In this study, I apply Lennie and Tacchi's (2014) approach to evaluating communication for development in a case study of Pride Campaigns implemented by managers throughout Indonesia who partnered with the conservation non-governmental organization …

Comic Book Fandom: An Exploratory Study Into The World Of Comic Book Fan Social Identity Through Parasocial Theory, Anthony Robert Ramirez

Open Access Theses & Dissertations

Comic books and their extensive lineup of characters have invaded all types of media forms, making comics a global media phenomenon that are having a wider profile in media and popular culture. The community of comic book fans has grown as well. The purpose of this study is to investigate how these fans identify with their favorite comic book character(s) through the application of parasocial theory, in order to discover if and how various identification levels lead to the fan's level of fandom or attachment. Various fans of comic books are interviewed, in order to investigate attachment levels and level …

Punto Ciego, Adelmar Alvin Ramirez

Open Access Theses & Dissertations

Ciudad Juarez, another type of history shown through newspaper articles and headlines, going against the stereotypical values of violence and feminicides.

Mobile Professional Development: Taxonomic Levels Of Learning On Teachers' Tpack Perceptions And Acquisition Of Technology Competencies, Raul Saldana Jr.

Open Access Theses & Dissertations

As it stands, the integration of technology can be advantageous for teachers, students, administrators, and parents, yet teachers are expected to teach and facilitate learning with new technologies in order to prepare students to succeed in a global economy. As the Part D of the Enhancing Education Through Technology Act of 2001 (Part D - Enhancing Education Through Technology, n.d) states, one of its purposes is to "enhance ongoing professional development of teachers, principals, and administrators by providing constant access to training and updated research in teaching and learning through electronic means," one of its goals is to "encourage effective …

A House All White And Empty Against The Night Sky, Jesus J. Silveyra

Open Access Theses & Dissertations

Not available.

Dopamine Regulation Of Disengagement In The Basal Ganglia Circuitry, Mabel N. Terminel

Open Access Theses & Dissertations

Evidence suggests that dopamine (DA) is crucial for initiation and termination as well as sustained execution of movement. For the present study, it was hypothesized that DA plays a more important role in initiation and termination of movement than in its sustained production. To test these hypotheses, rats were trained to walk on a treadmill in a continuous and discontinuous (walk 30 secs/stop 15 seconds) fashion for one hour while striatal DA samples were collected using In Vivo Microdialysis (IVMCD). We predicted larger increases during discontinuous compared to continuous walking. It was found that brain dialysate levels of DA consistently …