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Development And Characterization Of Perovskite Solar Cells For Tandem Device Configuration, Angel Moiseis De La Rosa

Open Access Theses & Dissertations

Photovoltaic devices based on perovskite materials are constantly progressing towards more applicability in large-area panels. In order for perovskite-based photovoltaics to reach reliable and stable commercialization, common issues with the use of perovskite still need to be resolved, including the need to identify fabrication processes that can yield optimal material parameters for better photovoltaic performance. Defining an optimal fabrication process requires that researchers and manufacturers alike come to an agreement regarding perovskite characteristics that result from device operation and material processing. This work focuses on characterizing physical, electrical, and electronic properties of a FAxCs1-xPb(IyBr1-y)3 perovskite, and how some of these …

Sensory Integration And Its Role In Behavioral Plasticity In Children Diagnosed With Autism Spectrum Disorder, Clarissa Diaz

Open Access Theses & Dissertations

Although commonly characterized by communicative and social impairments, Autism Spectrum Disorder (ASD) presents a number of developmental deficits related to movement planning and action. The extent of these deficits to the entire neuromuscular system, as well as the individual input/output loops are still not well understood. Given the dynamic interplay between our plans, actions and outcomes lay the foundation for later mature motor behavior, it is critical to understand the unique motor learning processes these nervous systems face while a higher level of training plasticity may be present. A recent study examined the kinematics (acceleration, velocity, smoothness, etc.) of upper …

Juvenile Fluoxetine Treatment Mediates An Anxiogenic Phenotype That Is Ameliorated By Its Re-Exposure In Adulthood, Francisco Javier Flores Ramirez

Open Access Theses & Dissertations

Accumulating preclinical evidence indicates that early-life exposure to psychotropic medications induce an anxiogenic-like behavioral profile in later life. However, these preclinical approaches have been conducted primarily using male subjects. This is problematic since clinical data indicates that women are more likely to be diagnosed with anxiety disorders than their male counterparts, and thus, women are prescribed with psychotropic medications like fluoxetine (FLX), a selective serotonin reuptake inhibitor (SSRI), at significantly higher rates. Therefore, the goal of this Dissertation is to examine whether alterations in behavioral responses to anxiety-eliciting stimuli are exhibited in adulthood, as a result of early-life FLX exposure. …

Synthesis And Characterization Of Material Systems For 3d Printed Smart Structures, Hilda Fontes

Open Access Theses & Dissertations

The silica hollow spheres have demonstrated excellent results in multiple applications such as light-weight composites, and optical applications as a glass coating. This material also exhibits excellent thermal, shock impact, and hydrophilic properties extremely useful for industrial applications. However, a controllable size of the particle is desired to further increase the number of applications of the silica hollow spheres.

This Thesis aims a method to fabricate silica hollow spheres in a single step with a controlled diameter size. A study was developed to demonstrate the particle size change when adjusting the molecular weight of the medium by using different alcohol …

We Are All Green: Stereotypes For Female Soldiers And Veterans, Katherine French

Open Access Theses & Dissertations

As the number of females in the U.S. military continues to rise, the need for research concerning this cohort becomes increasingly important. In consideration of gender role theory, society may assume that soldiers and veterans are male, due to stereotypes. Thus, it was hypothesized that participants would be more likely to implicitly associate military (i.e. prior military or combat veteran) as male compared the neutral condition (i.e. prior Peace Corp volunteer). The current study (N = 174) used gender pronouns as implicit measures of gender assumptions. Participants were assigned to read six gender neutral scenarios; three focal scenarios (i.e. combat …

The Acute Effects Of Manual Resistance On Ballistic Bench Press Performance, Matthew Paul Gonzalez

Open Access Theses & Dissertations

Heavy conditioning activities (CA) during warm-ups has been found to improve subsequent movements. However, a problem with heavy CAs is the need for specialized equipment. Manual Resistance (MR) is accommodating resistance in which traditional exercises are replicated using resistance from a partner. This modality has led to improved muscular strength and endurance; however, the acute effects of MR have not been examined. Purpose: The purpose of this study was to determine if MR can lead to improvements in ballistic bench press (BBP) performance. Methods: Two subjects (age = 22.50 ± 0.71 years, weight = 97.88 ± 43.95 kg, BMI = …

Identification Of A Novel Single Amino Acid Substitution (V666g) Of Jak1 From A Patient With Acute Lymphoblastic Leukemia Impairs Jak3 Mediated Il-2 Signaling, Alice Hernandez Grant

Open Access Theses & Dissertations

The Janus kinase (JAK) family, notably JAK1, JAK2 and JAK3 are recognized as oncogenic drivers in high risk Acute Lymphoblastic Leukemia (ALL). The bulk of activating JAK mutations are thought to occur within functional hot-spots across Janus Homology (JH) domains. The most frequently mutated regions is the JH2 pseudo-kinase, which provides a negative regulatory role to the adjacent catalytically active JH1 kinase domain. Despite the prevalence of JAK activating mutations and a need for new therapeutic inhibitors, there is a lack of understanding in the allosteric regulation of JAK kinases. Here we sought to identify mutations involved in driving ALL …

Remediation And Prevention Of Harmful Algae Blooms (Habs) In Ascarate Lake At El Paso, Texas, Elizabeth Herrera Ortega

Open Access Theses & Dissertations

Ascarate park in El Paso, Texas is an example of an urban ecosystem in the middle of a growing city. It is the largest public-use recreational park in El Paso county and it includes a 48-acre Ascarate lake. The purpose of this study was to prevent harmful algae growth in Ascarate lake using phytoremediation by analyzing different water quality parameters. We installed artificial islands on west cove of the lake with African iris plants to determine the feasibility of remediation to prevent algae blooms in Ascarate lake. Water samples were collected at different points close and away from the islands …

Market Effects Of Local Media Employment Reductions On The Idiosyncratic Risk Of Nearby Firms; Returns, Valuation, And Debt; And Firm Meet-Beat Behavior And Ceo Turnover And Compensation, C. Kyle Jones

Open Access Theses & Dissertations

This research examines the effects of reductions in local and regional media employment on firms' information environment. A reduction in the number of local media employees available to provide coverage of firms is associated with persistent levels of increased idiosyncratic risk. The source of that firm-level risk appears to be increased estimation risk among investors, rather than decreased awareness about the investment opportunities or real effects on firms' product market competition. I also demonstrate that overall levels of local media coverage are associated with differences in returns similar to those associated with coverage in national outlets. While a reduction in …

Assessing Attitudes And Knowledge Regarding Voice Modification In Transgender People Among Practicing Speech Language Pathologists (Slps) In Texas, Iliana Renee Lopez

Open Access Theses & Dissertations

The purpose of this cross-sectional study is to examine the attitudes and knowledge of voice modification in TG persons among practicing SLPs in the state of Texas. Thirty-nine individuals completed the 10-minute survey with 38 questions. SLPs in Texas who responded are professionally and personally comfortable working with transgender individuals. Most respondents did not know what was targeted in voice modification services, however are willing to learn. Respondents' attitudes, knowledge and comfort were impacted most by personal values, graduate school education and personal relationships. The results from this study support the need for education and clinical training on cultural competence …

Familia First! A Qualitiative Study On The Impact Of Latinx First-Generation College Students' Degree Completion On Their Family In A U.S.-Mexico Border Community, Luis Jaime Mendez

Open Access Theses & Dissertations

Completing a bachelor's degree is a major milestone. The achievement can further be heightened by those who are the first in their families to graduate. By the same token, the attainment of a degree by first-generation Latinx students, who have statistically low percentages of education as compared to other ethnic groups, is crucial.

The purpose of this qualitative study was to examine the familial impact of Latinx first-generation degree completion. The primary research question directing the study was: How does degree completion impact families of Latinx first-generation college students in a U.S.-Mexico border community? Yosso's Community Cultural Wealth (CCW) model …

Mi Feria Es Su Feria: How Mexican Americans Created The 1968 San Antonio Hemisfair, Gene Thomas Morales

Open Access Theses & Dissertations

In 1968, HemisFair became the first world's fair to be held in San Antonio, the United States Southwest, and to be recognized by the Bureau of International Expositions. Countries from around the globe were brought together by a shared commitment to democratic unity, Pan-American friendship, and to celebrate San Antonio's 250th anniversary. San Antonio Fair Inc., the group in charge of the fairâ??s construction and production, worked closely with community leaders, the Texas state government, and the U.S. federal government to create the exposition. The fair's theme would be called Confluence of Civilizations in the Americas. Confluence for the fair …

Working Memory Performance In Spanish-English Bilinguals' First And Second Languages, Jordan Allyssabeth Orozco

Open Access Theses & Dissertations

Background: Working memory is important for speech understanding in that speech recognition requires the processing, temporary storage, and manipulation of information during complex cognitive tasks. Previous research has shown contradictory findings on whether bilinguals have an advantage in working memory capacity compared to their monolingual counterparts. Differences in findings have been attributed to various factors to include task-dependent effects and poorly matched samples. Therefore, the existence of a bilingual advantage in working memory remains unclear.

Purpose: The purpose of this study was to examine the working memory performance of Spanish/English bilingual individuals compared to English monolingual individuals using a linguistically …

Bilingual Children's L1 And L2 Word Frequency Effects: The Role Of Individual Differences, Astrid Michelle Portillo

Open Access Theses & Dissertations

Bilingualism continues to grow among the world's population. Nevertheless, most research studies on language processing have focused on monolingual individuals, leaving questions about how language processing unfolds in bilingual individuals. Here, we investigated how individual differences in bilingual experience, indexed by current L2 exposure, impact eye movement measures of reading fluency, indexed by word frequency effects, in an understudied population: bilingual children. Prior eye movement research involving bilingual younger adults (aged 18 to 30) has reported a trade-off in L1 and L2 word frequency effects with greater levels of current L2 exposure (Whitford & Titone, 2012, 2017). We wanted to …

Partitioning Variation In Vegetation And Landscape Functionality In Arid Land Piosphere, Eahsan Shahriary

Open Access Theses & Dissertations

A piosphere is an interaction between vegetation community, watering point, and grazing livestock/wildlife. In this Dissertation, I begin by reviewing the concept of the piosphere, and the progress, knowledge gaps and common statistical approaches and errors in piosphere research. Landscape functionality, plant community distribution and their influencing factors on a piosphere in Iran are then investigated.

A total 862 piosphere publications of multiple types from 68 countries and 10 different languages during the period of 1915 â?? 2018 were reviewed. Australia was the most productive country followed by South Africa, the USA, Botswana and Argentina. Ivan Thrash is the most …

Specimens Of Opportunity Reveal Novel Information On The Sowerby's Beaked Whale (Mesoplodon Bidens), Kerri Jean Smith

Open Access Theses & Dissertations

Conservation science requires quickly acquiring information and taking action in order to protect species at risk of extinction. Elusive wildlife, however, present challenges to effective conservation measures because it is often difficult to collect enough data on these species to recognize their conservation needs and implement management plans. As a result, researchers must identify alternative means of gathering sufficient data on these species. Specimens of opportunity, such as museum specimens, provide a way to improve knowledge on these species, and these specimens have already proven valuable by increasing information on biodiversity, habitat and range, and population structure in many species. …

Substance Use Among 7th - 9th Grade Adolescents: The Role Of Risk- Related Variables In The Probability Of Use Involving Tobacco, Alcohol And Marijuana, Susana A. Villalobos

Open Access Theses & Dissertations

The role of schools in preventing substance use among adolescents is a priority for public health advocates across the United States. In recent years the United States has seen an increase in prescription medication overdoses in adults and adolescents. A lack of research exists of adolescents in middle school substance use (Welsh, & Rappaport, 2018). Trends of adolescent substance use of tobacco, alcohol and marijuana continue to rise. Early onset use of legal and illegal substances has proven to increase the odds of long-term use of adolescence into adulthood. Parents, educators, community advocates and law enforcement have long tackled the …

The Influence Of Over-Ground Versus Treadmill Walking On Gait Mechanics In Children With Autism Spectrum Disorder, Emily Ann Chavez

Open Access Theses & Dissertations

Treadmill (TM) walking may be a way to combat obesity and socio-behavioral barriers associated with children with Autism Spectrum disorder (ASD), though tripping-risk has not yet been assessed for this population through use of spatial-temporal gait analysis. The aim of this project/study was to examine spatial-temporal walking mechanics and lower extremity tripping descriptors between over ground (OG) and TM gait conditions in children with ASD compared to children with neurotypical development (NT). Kinematics data were obtained through tridimensional motion analysis where participants, 10 children with ASD and 9 age- and sexmatched NT controls, were outfitted with retroreflective markers on their …

Attainment Of Rigorous Thermodynamic Consistency And Surface Tension In Single-Component Pseudopotential Lattice Boltzmann Models Via A Customized Equation Of State, Cheng Peng, Luis F. Ayala, Zhicheng Wang, Orlando M. Ayala

Engineering Technology Faculty Publications

The lack of thermodynamic consistency is a well-recognized problem in the single-component pseudopotential lattice Boltzmann models which prevents them from replicating accurate liquid and vapor phase densities; i.e., current models remain unable to exactly match coexisting density values predicted by the associated thermodynamic model. Most of the previous efforts had attempted to solve this problem by introducing tuning parameters, whose determination required empirical trial and error until acceptable thermodynamic consistency was achieved. In this study, we show that the problem can be alternatively solved by properly designing customized equations of state (EOSs) that replace any cubic EOS of choice during …

Pathways To Success In Anatomy And Physiology At The Community College: The Role Of Prerequisite Courses, Staci B. Forgey, Mitchell R. Williams, Shana Pribesh

Educational Leadership & Workforce Development Faculty Publications

Gatekeeper courses such as Anatomy and Physiology are often referenced in discussions regarding the national shortage of persons in allied health professions. In an attempt to bolster access to STEM professions, some community colleges are mandating prerequisite courses such as Natural Sciences and/or General Biology for STEM gatekeeping courses. In this study, we examined which of these prerequisite courses helped students to pass Anatomy and Physiology and whether the courses are an additional barrier to STEM field completion. This was the first study to evaluate whether a prerequisite course was predictive of success in Anatomy and Physiology, and it contributes …

An Exploration Of Pharmacy Education Researchers' Perceptions And Experiences Conducting Qualitative Research, Antonio A. Bush, Mauriell Amechi, Adam Persky

Educational Leadership & Workforce Development Faculty Publications

Objective. To investigate pharmacy education researchers' experiences in conducting qualitative research and their perceptions of qualitative research in pharmacy education

Methods. A phenomenological approach was used to conduct one-time, in-depth interviews with 19 participants from 12 schools and colleges of pharmacy. Interview transcripts were coded and themes were identified using a modified form of the Sort and Sift, Think and Shift method of data analysis.

Results. Faculty members were the largest subgroup in the sample, followed by graduate students, postdoctoral fellows/scholars, and residents. Pharmacy education researchers had varying levels of training in conducting qualitative research and some had none at …

Qualitative Research In Pharmacy Education: An Exploration Of Pharmacy Education Researchers' Perceptions And Experiences Conducting Qualitative Research, Antonio A. Bush, Mauriell Amechi, Adam Persky

Educational Leadership & Workforce Development Faculty Publications

Objective. To investigate pharmacy education researchers’ experiences in conducting qualitative research and their perceptions of qualitative research in pharmacy education

Methods. A phenomenological approach was used to conduct one-time, in-depth interviews with 19 participants from 12 schools and colleges of pharmacy. Interview transcripts were coded and themes were identified using a modified form of the Sort and Sift, Think and Shift method of data analysis.

Results. Faculty members were the largest subgroup in the sample, followed by graduate students, postdoctoral fellows/scholars, and residents. Pharmacy education researchers had varying levels of training in conducting qualitative research and some had none at …

Are (We) Going Deep Enough?: A Narrative Literature Review Addressing Critical Race Theory, Radical Space Theory, And Black Identity Development, Kala Burrell-Craft

Educational Leadership & Workforce Development Faculty Publications

A narrative literature review was conducted to examine how researchers address the concept of intersectionality using critical race theory, racial space theory, and Black identity development. A Boolean search revealed 18 articles met criteria for consideration. Multiple reviews occurred to isolate the articles that contained all the search criteria and multiple reviews occurred that selected the Boolean phrase or phrases that the researcher was searching for. Thirteen of the 18 articles met one or more search criteria and were included in the review, however, no articles matched 100 percent for inclusion. Thus, indicating we are not going deep enough in …

Reconceptualizing College Impact Studies Through A Fractal Assemblage Theory, Laura Elizabeth Smithers

Educational Leadership & Workforce Development Faculty Publications

College impact studies have formed the common sense of understanding institutional relationships to student growth and change for decades. In this time, they have become entangled with the production of the neoliberal university. This paper¹ presents an alternative theorization of student change on campus, a fractal assemblage theory. Assemblage theory is discussed through a single common language of major assemblage theory concepts across four authors. After exploring these concepts in depth, this paper returns to the stakes of assemblage theory: higher education research not to channel student to predetermined outcomes, but to create student futures in excess of our …

Family Structure Stability And Transitions, Parental Involvement, And Educational Outcomes, Shana L. Pribesh, Jane Smith Carson, Mikaela J. Dufur, Yuanyuan Yue, Kathy Morgan

Educational Leadership & Workforce Development Faculty Publications

The family environments children live in have profound effects on the skills, resources, and attitudes those children bring to school. Researchers studying family structure have found that children who live with two married, opposite-sex, biological parents, on average, have better educational outcomes than children living in alternate family structures, perhaps due to higher resources, lower stressors, or different selectivity patterns. Socioeconomic stratification plays a major role in family structure, with low-income families seeing more instability. We argue that the impact of family structure is attenuated by transitions in and out of family structures that may decrease a specific resource important …

Effects Of Spatial Location Of Auditory Tones On Pitch Discrimination, Ashley G. Flagge, Julie M. Estis, Robert E. Moore

Ashley Flagge Publications

Pitch discrimination accuracy has been found to be affected by many factors, including handedness, musical training, interfering stimuli, and spatial location of the auditory stimulus. Separating the stimulus input location of interference tones from initial (reference) and final (comparison) tones leads to more accurate pitch discrimination, but the effects of spatial location relationships between the reference, interference, and comparison tones have not been fully explored. This study examined the impact of stimulus spatial location in 24 young, non-musician females. Participants determined whether the pitch of reference and comparison tones was the same or different in 20 pitch discrimination conditions with …

The Contribution Of Frequency Discrimination Ability To Auditory Temporal Patterning Tests In Children, Ashley G. Flagge, Tara M. Davis, Victoria Henbest

Ashley Flagge Publications

Purpose: The Pitch Patterns Test (PPT) and Duration Patterns Test (DPT) are clinical auditory processing tests that evaluate temporal patterning skills based on pitch (PPT) or duration (DPT) aspects of sound. Although temporal patterning tests are categorized under the temporal processing domain, successful performance on the PPT also relies on accurate pitch discrimination. However, the relationship between pitch discrimination ability and temporal patterning skills have not been thoroughly evaluated. This study examined the contribution of pitch discrimination ability to performance on temporal patterning in children through the use of a pitch discrimination task and the PPT …

Examining The Complex Relationship Between Innovation And Regulation Through A Survey Of Wastewater Utility Managers, Luke Sherman, Alida Cantor, Anita Milman, Michael Kiparsky

Geography Faculty Publications and Presentations

Despite pressures to increase performance and decrease costs, innovation has been slow to emerge in the municipal wastewater sector. The relationship between regulation and innovation in this sector is a particularly interesting aspect of this conundrum, given the degree to which public utility decision-making is influenced by regulation. Using a national survey, this paper examines US wastewater utility managers’ perceptions of how regulation influences the adoption of new technologies. Recognizing that the relationship between innovation and regulation is complex, we develop the concept of regulation as multifaceted and examine three interrelated aspects of regulation: (1) regulatory requirements, (2) regulators and …

Evaluating Cmip6 Model Fidelity At Simulating Non-Gaussian Temperature Distribution Tails, Arielle J. Catalano, Paul Loikith, J. David Neelin

Geography Faculty Publications and Presentations

Under global warming, changes in extreme temperatures will manifest in more complex ways in locations where temperature distribution tails deviate from Gaussian. Confidence in global climate model (GCM) projections of temperature extremes and associated impacts therefore relies on the realism of simulated temperature distribution tail behavior under current climate conditions. This study evaluates the ability of the latest state-of-the-art ensemble of GCMs from the Coupled Model Intercomparison Project phase six (CMIP6), to capture historical global surface temperature distribution tail shape in hemispheric winter and summer seasons. Comparisons with a global reanalysis product reveal strong agreement on coherent spatial patterns of …

‘‘Appearance Of Corruption’’: Linking Public Opinion And Campaign Finance Reform, Douglas M. Spencer, Alexander G. Theodoridis

Publications

At present, campaign finance regulations may only be justified if their primary purpose is to prevent quid pro quo corruption or the appearance of corruption. References to the ‘‘appearance of corruption’’ are ubiquitous in campaign finance decisions, yet courts have provided very little guidance about what the phrase means. In this article, we report findings from a broadly representative national survey in which we (1) directly ask respondents to identify behaviors that appear politically corrupt, and (2) indirectly measure perceptions of corruption using a novel paired-choice conjoint experiment asking respondents to choose which of two randomly generated candidates are more …