Digital Commons Network^™

Alcohol Use In College Students As A Function Of Reinforcement Sensitivity, Life Events, And Affect, Hyoung S. Lee

Open Access Theses & Dissertations

Mood has been commonly viewed as an important determinant of drinking, but studies of positive and negative affect and alcohol use have reported inconsistent results. It has been suggested that the relationship between negative affect and heavy drinking or drinking problems depends on individual vulnerability dimensions such as personality. Gray's Reinforcement Sensitivity Theory (RST) may provide a particularly useful framework in studies about alcohol use, connecting personality, motivational processes, and responses to environmental stimuli. In past studies, the sensitivity of Gray's Behavioral Activation System (BAS) has been linked to alcohol use, but results have been less consistent for the Behavioral …

Incidence Functions, Yiyu Liao

Open Access Theses & Dissertations

In the mid 1960's, the incidence algebra was introduced in the seminal paper of Gian-Carlo Rota. He addressed the importance of the Mobius function in combinatorics. In particular, the incidence algebra of a locally finite poset plays an essentially unifying role in the theory of the Mobius function. One of the significant generalizations is the incidence algebra of a Mobius category introduced by Pierre Leroux. With the help from Mobius category, it was exciting to be able to extend the combinatorial results more broadly than just on posets. Before attempting to study this generalization of the Mobius function, we have …

Ecological Study Of Oxygen Consumption In Three Species Of Rattlesnake, Crotalus Atrox, C.Lepidus And C. Molossus (Viperidae) From The Northern Chihuahuan Desert, Luis Miranda

Open Access Theses & Dissertations

The purpose of this study was to compare oxygen consumption of three species of rattlesnakes, Crotalus atrox, C. lepidus and C. molossus, that inhabit the Chihuahuan Desert within the Indio Mountain Research Station (IMRS), Hudspeth County, Texas. The resting metabolic rates (RMR) of 39 rattlesnakes (C. atrox, N = 17; C. lepidus, N = 8; and C. molossus, N = 14) were determined at four experimental temperatures (20°, 25°, 30°, and 35°C). The body masses ranged from 47 to 660 g for all three rattlesnake species.

The temperature coefficient of metabolism (Q10) averaged 2.8 between temperatures of 20°-30°C and 2.15 …

Embodied Cognition As Refutation To Langer's "Illusory Powers": "I Move, Therefore, I Know", Ruby Amanda Montana

Open Access Theses & Dissertations

Thesis Objective: To refute Susanne Langer's notion within her philosophy of dance which holds that emotional forces in dance are solely "virtual" and thus illusory. I plan to do so by means of the growing research in the branch of cognitive science known as Embodied Cognition.

In Brief: Susanne Langer, one of the most prominent philosophers of Aesthetics, contends that dance is able to express emotions as an external force, while creating what she calls a "primary illusion". Langer attributes gesture as the basic abstraction whereby the dance illusion is made and organized. Furthermore, she contends that dance is not …

The Premium, Breakeven, And Discount Exchange Rates Of The Mexican Peso In The El Paso Retail Sector, Raul Anton Munoz

Open Access Theses & Dissertations

This paper studies the exchange rates at which Mexican pesos are accepted by different retail sectors in El Paso, Texas. A random sample of 1,155 firms was surveyed to examine two aspects of reverse dollarization in the El Paso/Juarez border region. The first is to determine the percentage of retail businesses in El Paso that accept foreign currency in the form of Mexican pesos. The second is to calculate the effective exchange rate at which firms accept Mexican pesos. Out of 1,155 retail firms surveyed, 586 responses were obtained. The results of this investigation suggest that less than 14 percent …

The Interplay Between Host Cells And The Human Pathogen Trypanosoma Cruzi: Role Of Toll-Like Receptors, Lilian Lie Nohara

Open Access Theses & Dissertations

The protozoan parasite Trypanosoma cruzi is the etiologic agent of Chagas disease, a neglected infectious disease that is becoming a world health concern. This obligate intracellular parasite employs a diversity of molecules and strategies to successfully invade a wide variety of mammalian cells and modulate host immune responses, which are essential features for completion of its life cycle in the host. The major plasma membrane antigens of T. cruzi infective trypomastigote forms are glycosylphosphatidylinositol (tGPI)-anchored mucin-like glycoproteins. Although previous studies demonstrated that the proinflammatory responses induced by tGPIs are mediated by Toll-like receptor (TLR) 2, the involvement of other TLRs …

Interactions Of The Cellular Sumoylation System With Influenza A Virus And Its Non-Structural Protein Ns1a (Ns1a), Sangita Pal

Open Access Theses & Dissertations

The most important current anti-influenza weapons, vaccination and antiviral drugs, can be rapidly rendered fully ineffective thanks to the virus's high mutational rate, which produces viruses exhibiting new antigenic properties and structural proteins insensitive to the drug's mechanism of action. One attractive alternative is to develop drugs that modulate the activity of cellular systems either required for viral growth or able to neutralize viral growth. Here we demonstrate that the cellular SUMOylation system, a post-translational modification involving the conjugation of the Small Ubiquitin-like MOdifier (SUMO) to specific protein targets using a Ubiquitin-like enzymatic cascade, interacts closely with influenza virus during …

A Specific Regulatory Role For Sgtα On The Maturation And Activation Of Steroid Hormone Receptors, Atanu Paul

Open Access Theses & Dissertations

Steroid hormone receptors (SHRs) are ligand-dependent transcription factors belonging to the nuclear receptor superfamily. These receptors regulate various physiological functions in higher ordered eukaryotes. In the absence of hormone these receptors form a complex with molecular chaperones such as Hsp90 and Hsp70 and other cochaperones in the cytoplasm. Association with the Hsp90-Hsp70 chaperone machinery leads to the maturation of the Ligand Binding Domain (LBD) of the receptors and enables the receptors to bind hormone with high affinity. Upon binding with a specific hormone the receptors are translocated into the nucleus where they initiate transcription of specific genes. Although the involvement …

Microstructure Investigation Of Al-Rich Titanium Aluminum Alloys, David Pham

Open Access Theses & Dissertations

The microstructures of Ti-Al alloys with 70-80 wt% Al were investigated. Aluminum wire (99.999%) and TiH₂ powder (99.7%) were used to produce the sample compositions inside a vertical tube furnace at 1600^oC in an Ar atmosphere. Argon is purified through a dehumidification and deoxidation system. Magnesium perchlorate Mg(ClO₄)₂ acts as a desiccant and titanium sponge pulls oxygen from the Ar in furnaces operating at 800^oC and 750^oC. X-ray diffraction and an optical microscope are used to identify phases and compositions

Spectroscopic Study Of The Inhibition Of Calcium Oxalate Calculi By Larrea Tridentata, Luis Alonso Pinales

Open Access Theses & Dissertations

The causes of urolithiasis include such influences as diet, metabolic disorders, and genetic factors which have been documented as sources that aggravate urinary calculi depositions and aggregations, and, implicitly, as causes of urolithiasis. This study endeavors to detail the scientific mechanisms involved in calcium oxalate calculi formation, and, more importantly, their inhibition under growth conditions imposed by the traditional medicinal approach using the herbal extract, Larrea tridentata. The calculi were synthesized without and with Larrea tridentata infusion by employing the single diffusion gel technique. A visible decrease in calcium oxalate crystal growth with increasing amounts of Larrea tridentata herbal infusion …

The Latina/O Mental Health Paradox Or Racial/Ethnic Disparities? Depression Among New Immigrants To The U.S, Sandra Iveth Ramirez

Open Access Theses & Dissertations

The Latino/a Mental Health Paradox states that the foreign-born immigrants have better mental health outcomes when compared with native-born groups of various ethno-racial backgrounds, with the gap in mental stress minimizing overtime. The objective of this study is to examine whether Latina/os immigrants suffer an ethno-racial disparity in mental health or if they have favorable mental health outcomes as predicted by the Paradox. Expanding on the Latina/o Mental Health Paradox, rather than comparing Latina/o immigrants with native-born, this study will compare depression among recently legalized Latina/os with recent legalized European immigrants.

A Revolution In Rhetoric: Recycling The Language Of Control Through Rhetorical Activism, Jerien Elizabeth Rausch

Open Access Theses & Dissertations

The English language, with its infinite space and possibility, is and can be recycled to recreate authority of voice and representations of the past. Where once language was used for creating and maintaining colonial control, now, with its careful study and critical (re)applications through fictions written as alternative versions of colonial events, it can be a source of power for the reclamations of identity, culture, religion, history, story, context, and imagination. This study (re)examines an iconic exploration and colonial narrative to highlight the rhetoric used to capture and create Indigenous Peoples and places. Additionally, this study explores how works of …

Bajo La Lira De Dios, Manuel José Rincón Domí­Nguez

Open Access Theses & Dissertations

The novel is about William Walker, his dictature in Nicaragua, his dead and the American presence in latinoamerican countries.

Fabrication Of Miniature Drug Screening Platform Using Low Cost Bioprinting Technology, Jorge Ivan Rodriguez

Open Access Theses & Dissertations

In the pharmaceutical industry, new chemicals and substances are being tested to find appropriate compounds or mix for treating a specific disease. The demand for screening large compound collections against and increasing number of therapeutic targets has stimulated technology development in the areas of assay automation and miniaturization. Current methods for evaluating the reactions of cells use a volume in the range of microliters. We have developed a new and low-cost deposition method to fabricate miniature drug screening platform that can realistically and inexpensively evaluate biochemical reactions up to 4 substances per trial in a picoliter-scale volume. This paper describes …

Health Risk And Health-Seeking Behaviors Of Migrant And Seasonal Farmworkers On The Us-Mexico Border, Claudia Delilah Saenz

Open Access Theses & Dissertations

Background and Significance

The estimated 1–3 million migrant and seasonal farmworkers (MSFW) employed in the U.S. play a crucial role in assuring the success of the multi-billion dollar agricultural industry and the nation's access to a safe and nutritious food supply. This predominantly Mexican immigrant occupational group is documented to be at–risk for chronic and infectious disease morbidity and premature mortality but published studies are limited which describe their reproductive/sexual health, mental health, substance abuse, and workplace violence situation. Prior studies are especially scant regarding U.S.–Mexico border MSFW.

Objectives and Hypothesis

The major objective of the pilot study was to …

Information Sharing Across Private Databases, Swapnil Suresh Samant

Open Access Theses & Dissertations

While the explosion of availability of information has become invaluable in modern society, it has also raised valid concerns about erosion of privacy. More and more, different entities are encouraged to share information in order to discover potential security risks, health pattern, or social behavior trends. However, some of this information is sensitive. Owners of information may be unwilling to share their whole databases with other entities, either to protect the privacy of the records, or because of the proprietary nature of the information.

We consider the following problem. How can we compute the intersection and the equijoin of databases …

Factors Related To The Recruitment And Retention Of Nurse Practitioners In Rural Areas, Dayle Boynton Sharp

Open Access Theses & Dissertations

For the past several decades, rural America has experienced significant health disparities. Changes in the demographics of rural locations in the U.S. have led to a) an increase in an aging population, b) an increase in minority populations, and c) a large number of unemployed individuals due to the shifting of jobs. In some locations, a large number of these unemployed or underemployed are uninsured or underinsured. Parallel to the changes in demographics, there has been a decrease in primary care providers in rural areas. Consequently, rural America is facing reduced and unequal access to healthcare. One solution to limited …

Prejudice With A Conscience: How A Strong Moral Identity Relates To Greater Prejudice, Moira P. Shaw

Open Access Theses & Dissertations

The present research investigated the effects of moral licensing on prejudice for participants with a strong moral identity. It predicted that, because people with a stronger moral identity are especially motivated to be moral, they would be strongly affected by moral licensing effects on prejudice. Three experiments tested this prediction by measuring moral identity, experimentally manipulating and measuring three sources of moral license (moral affirmation, moral superiority, and moral threat), and measuring inter-group prejudice. The results demonstrated that with moral affirmation and moral superiority, a strong moral identity relates to greater prejudice (Experiment 1), moral superiority moderates the relation between …

Computer Aided Drug Design Methods & Quantitative Structure-Activity/Property Relationships, Suman Sirimulla

Open Access Theses & Dissertations

The first part of dissertation consists of development of a QSAR model for 229 mutagenic aromatic amines and a QSPR model of partial molar volumes of amino acids. A common procedure for QSAR analysis consist of data selection (generally sets of homologous series of compounds and their corresponding biological activities), tabulation of trial physicochemical or molecular structural descriptors, followed by a multilinear statistical analysis to derive a statistically valid QSAR correlation of the activity data making use of a subset of the trial descriptors. A final important step is cross-validation to assess the putative predictive (rather than just correlative) capabilities …

The Role Of Generation And Monitoring Processes In Governing The Paradoxical Effects Of Retrieval On Memory For Faces, Kyle Joseph Susa

Open Access Theses & Dissertations

Verbal descriptions of faces can at times impair and at other times facilitate subsequent face identification accuracy. Three experiments were conducted from a retrieval-based theoretical perspective to determine the underlying cognitive processes that can account for these paradoxical findings. Results demonstrated that the verbal description-identification relationship is analogous to other domains of memory where an initial retrieval of memory can have both positive and negative effects on subsequent retrieval attempts. Results of Experiment 1 showed that verbal facilitation is a product of self-generated descriptions that enrich the semantic encoding of the original memory trace. Experiments 2 and 3 demonstrated that …

Aterrizaje, Francisco Alejandro Tedeschi

Open Access Theses & Dissertations

This work is a novella about Alejandro Tardelli, a character who struggles with life in his adolescence.

Scaffold Based In-Vitro Osteodistraction For Bone Tissue Engineering, Cesar Adrian Terrazas

Open Access Theses & Dissertations

Engineering of hard tissues such as bone is a challenge because of the limited ability of the body to heal large defects. Current treatment options, such as employing bone sections from the patient or a deceased donor have been utilized for some time now with various degrees of success. However, these methods still exhibit many limitations such as limited supply and the possibility of transmission of disease.

To address the many limitations of bone grafts, synthetic engineered substitutes have been developed and widely researched for nearly three decades. Generally termed scaffolds, these are matrices that serve the purpose of temporary …

A Risk Analysis Framework For Toll Road Revenue Forecasts, Gabriel Alejandro Valdez Ceniceros

Open Access Theses & Dissertations

In the United States, the shortage for traditional public sector funding sources for a safer and more effective highway infrastructure has made it more increasingly difficult for transportation agencies to keep up with the increasing demand. As a consequence, transportation agencies are considering a number of alternatives to raise funds such as charging tolls or cooperating with the private sector. One of the most important steps when analyzing the feasibility of a toll road is the traffic forecast process. However, the uncertainty of the traffic forecast has become apparent across the U.S. as evident in the common overestimation of traffic …

Acoustic Reflectometry Using Gaussian-Modulated Sinusoidal Waves And The Ware-Aki Algorithm, Ernesto Rodrigo Vazquez Ceron

Open Access Theses & Dissertations

Acoustic reflectometry, a non invasive technique, consists of solving, the inverse problem of estimating the cross sectional area as function of the distance of a cylindrical cavity by impacting an audible acoustic pulse of high amplitude and short duration, and analyzing the reflected wave. The technique has been applied in Biomedical Engineering to estimate both the area of a human upper airway and the patency of endotracheal tubes as a function of distance. Several ways have been tested to improve the quality of an acoustic pulse and different algorithms have been tested to reduce the losses. However, an acoustic pulse …

/Ae/ And /E/ In El Paso English, Lance Levi Williams

Open Access Theses & Dissertations

The production and perception of front vowels /ae/ and /e/ by El Paso residents was examined in a pilot study to begin to establish linguistic variables in an understudied yet dynamic speech community and explore the question of the unity of the speech community and possible influence of L2 English speakers on L1 English speakers. 25 subjects, males age 19 to 34, were given both tests of perception and production, and these results were analyzed with respect to their social and linguistic backgrounds. In general, subjects in the Anglo group appeared to be more united in their production and perception …

Use Of Cognitive Constructs In Linear Algebra, Azucena Zamora

Open Access Theses & Dissertations

Thesis analyzed the presence of two cognitive entities-- modes of thinking and metonymies and metaphors- in the reasoning of three students enrolled in a first year matrix algebra course at a southwest university via the responses given to a set of eight questions asked during one-on-one interviews. The findings of our analysis shed light on the cognitive constructs that students employ to form their understanding of linear algebra concepts. Furthermore, our findings provide clues about the ways in which students move from one mode of thinking to another in the context of varying levels of exposure to graphical, algebraic, and …

Tectonic Geomorphology Of The Puna Tsang Chhu, Western Bhutan, Abby May Woody

Open Access Theses & Dissertations

There are two boundaries, or physiographic transitions, between three distinct topographic regions in Bhutan. The southern and northern regions have relatively steep hillslopes and high relief, while the central region has gentle hillslopes and low relief. The geomorphology of a 70-km stretch along the Puna Tsang Chhu valley between the towns of Uma and Amrimo was studied in March and April of 2009 to provide constraints on the active tectonics of western Bhutan and the nature of these physiographic transitions.

The Puna Tsang Chhu valley contains a set of alluvial cut-and-fill and bedrock (strath) river terraces with associated sediments - …

Titanium Niobium Nano Porous Materials: New Photocatalysts For Water Decontamination, Maryam Zarei Chaleshtori

Open Access Theses & Dissertations

Water pollution is major environmental problem worldwide. Many common industrial organic compounds that make their way into water systems can be carcinogenic at trace levels and are difficult and costly to remove completely with conventional technologies. Because of this, authorities and researchers are trying to improve current water cleanup techniques.

Heterogeneous photocatalysts that accelerate the photocatalytic destruction of organic contaminants in water are a potentially inexpensive and highly effective way to remove both trace-level and saturated harmful compounds from industrial waste streams and drinking water. Titanium dioxide has the potential to completely mineralize organic compounds in water under ultraviolet light. …

Urban Development Under Extreme Hydrologic And Weather Conditions For El Paso-Juárez: Recommendations Resulting From Hydrologic Modeling, Gis, And Remote Sensing Analyses, Alberto Barud-Zubillaga

Open Access Theses & Dissertations

During the 2006 El Paso-Juárez flood there were many concerns regarding the capability of the existing stormwater system to handle 50- and 100-year flood events in El Paso, Texas and Juárez, Mexico area. Moreover in 2008, a considerable wet year from the normal 223 mm of annual precipitation for El Paso demonstrated that the area could very well received large amounts of precipitation at localized areas in short periods of time, representing a great flood threat to residents living in areas prone to flood. Some climate change projections for the area are exactly what had occurred over the last two …

Resistive Switching Of Tin Dioxide (Sno2) For Memristor Applications, Sergio Fabian Almeida

Open Access Theses & Dissertations

In the last decades new electrical devices have been investigated in order to overcome problems caused by integrated circuit shrinking. Within these devices there is one that has attracted much attention due to its high scalability and simple structure. This device was proposed theoretically by Leon Chua in 1971 who gave it the name of "Memristor". In the recent years thin films structures composed of a metal/oxide/metal (MOM) stack have been linked to this new device, also known as "Resistive switching". There are several applications for the memristor; one of the most important is for resistive random access memory (ReRAM) …