Digital Commons Network^™

Understanding The Connections: An Analysis Of Climate Change And Human Security, Erica Martinez

Open Access Theses & Dissertations

Increasing evidence shows that the impacts of anthropogenic climate change have magnified and will have dramatic implications for both the natural and social systems (Adger et al., 2014). While research on the security implications of climate change has been found to have a major bearing on policy making, experts have not reached a consensus about how climate change and human security are related, leaving the climate-security nexus and corresponding policies underdeveloped.

The purpose of this study is to delineate and scrutinize the relationship between climate change and human security so that a more comprehensive understanding of the phenomenon is achieved. …

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 …

Expression And Functional Sialome Of Triatomines, Insect Vectors Of Chagas Disease, Maria Tays Mendes

Open Access Theses & Dissertations

Triatomines are blood-sucking arthropods that transmit Trypanosoma cruzi, the etiologic agent of Chagas disease (ChD). Triatomines use bioactive molecules in the saliva for successful blood feeding and to evade the hemostatic and immune defense system of the hosts. Knowing the saliva composition could be useful for a better understanding which and how insect-derived molecules might influence host-parasite interactions. Previous studies have shown that some saliva-derived proteins and lipids can modulate the host immune system and increase T. cruzi infection. We hypothesize that the triatomine saliva contains a great diversity of lipids and proteins that can modulate the mammalian host immune …

Boxing Training Effects On Cardiovascular Risk, Quality Of Life, Endothelial Function, And Blood Flow Patterns In Individuals With Elevated Blood Pressure Or Stage 1 Hypertension, Francisco Morales

Open Access Theses & Dissertations

Early stages of high blood pressure, such as elevated blood pressure or stage 1 hypertension, have shown to increase cardiovascular mortality. Exercise is recommended for the prevention and treatment of high blood pressure; however, most clinical evidence is based on traditional types of exercise that have relatively high dropout rates. Therefore, the purpose of this study was to evaluate the effects of boxing training, a nontraditional exercise modality, on clinical and vascular outcomes and its relation to blood flow patterns in individuals with elevated blood pressure or stage 1 hypertension. To achieve these goals, two experiments were designed. The first …

Molecular And Functional Characterization Of Α-Galactosyl Epitopes In Trypanosoma Cruzi, Uriel Ortega Rodriguez

Open Access Theses & Dissertations

Trypanosoma cruzi, the causative agent of Chagas disease (CD) currently affects 6-7 million people across the world. Currently, only two drugs, benznidazole and nifurtimox, are available for treatment of CD and they are highly toxic and less effective in the chronic stage of the disease. Specific biomarkers for diagnosis and follow-up of treatment do not exist in the clinical settings. following chemotherapy, patients take approximately 10-20 years to exhibit negative seroconversion with the conventional serology assays. Moreover, there is no vaccine available to prevent or treat CD. T. cruzi contains a complex cell surface consisting of several classes of glycoconjugates …

A Comparative Assessement Of Discrete And Reciprocal Design In Children With Autism Spectrum Disorder, Jallycia Rene Pearson

Open Access Theses & Dissertations

Although typically diagnosed through social impairment and repetitive stereotypical behavior, recent work in the last decade has shown motor irregularities across the autism spectrum. With regard to upper extremity coordination, studies have agreed that children on the Autism spectrum present overall decreased performance compared to their neurotypical peers but fail to find commonality on the locus of this error. For example, studies have highlighted reaction time, arm trajectory as well as corrective sub-movements as areas in need of improvement. One possible reason for the conflicting results could be related to the nature of the task employed, e.g. discrete vs reciprocal …

Impact Of School Closures On Principal Leadership And Identity, Isela Pena

Open Access Theses & Dissertations

This Dissertation presents findings from a phenomenological qualitative study of three principals who experienced school closures. This research aimed at exploring the impact of school closures on principal leadership and leadership identity. Utilizing the Ackerman's and Maslin-Ostrowki's (2002) concept of the wounded leader, this study framed the school closure as a critical incident which caused these principals to experience a wounding, thus providing them an opportunity to reflect and create a narrative around their experience, and through this examination, potentially undergo a transformation leading to professional and personal growth. Through semi-structured interviews, three school principals who experienced school closures, shared …

Achieving Effectiveness And Innovation In U.S. Public Organizations Through Ability-Enhancing And Opportunity-Enhancing Soft/Commitment High Performance Work Practices, Kingshuk Saha

Open Access Theses & Dissertations

It is well-established in the management literature that HPWPs improve productivity in the private sector. But does HPWPs work in the public sector? A thorough literature search revealed only 45 HPWPs studies done in the public sector. The first purpose of this Dissertation is a thorough literature review of these 45 studies. Out of these 45 studies, only 12 had samples obtained from the U.S. Hence, it can be argued that there is much to be discovered about HPWPs in the U.S. public sector. The second purpose of this Dissertation is to categorize HPWPs in the U.S. public sector based …

Thinking Through Children: Proposing Theory For Doing Critical Content Analysis Of Multicultural Children's Literature, Carmen Milagros Seda

Open Access Theses & Dissertations

Theoretical constructs underpinning critical content analysis (CCA) for multicultural children's literature as a method for education as a field are currently drawn from critical literary theory. I problematize CCA methods based on claims by contributors that the methods are applicable for classroom educators, and can be applied during critical reading in classrooms with young readers. The change in audience and purpose warrants reflection on the extant theoretical underpinnings of CCA methods. Specifically, whether extant theories account for the mental life and psychoemotive needs of children and adolescents, especially as relates to agency analysis. Using a theoretical framework comprised of Childism …

Development And Validation Of The Perinatal Mental Health Literacy Scale Among Latinas, Irma Y. Torres-Catanach

Open Access Theses & Dissertations

Psychiatric disorders in pregnancy and in the first year after childbirth are considered a significant health complication of the perinatal period (O'Hara & Wisner, 2014). The prevalence of perinatal mood disorders has been shown to be higher among women from racial/ethnic minority groups (Gavin et al., 2011; Melville et al., 2010). As the largest racial/ethnic minority group in the U.S., Latinas are disproportionately affected by these disparities. Despite the volume of research examining the prevalence of and treatment for perinatal psychiatric disorders, there is a dearth of knowledge focused on educational approaches that aim to reduce perinatal mental health disparities. …

Secondary Student Perceptions Of School Climate Elements And Self-Reported Academic Self-Efficacy As Factors Of School Continuous Improvement, Marianne Arzadon Torales

Open Access Theses & Dissertations

State and national agencies recognize the link between school quality and student academic and behavioral outcomes. Research has shown that a positive school climate and high academic self-efficacy are associated with positive academic and behavioral student outcomes. Determining the school climate factors that contribute to academic self-efficacy will add to the limited research on the relationship between these two constructs and provide information to prospective and current school leaders in cultivating an effective school.

A multiple regression was used to determine how student-perceived school climate factors predict self-reported student academic self-efficacy and of these factors, which one provided the strongest …

The Effects Of Advancing Stages Of Pregnancy On Balance And Stair Locomotion In Healthy Females, Heather Vanderhoof

Open Access Theses & Dissertations

Background: One in four females fall while pregnant, which may lead to injury, hospitalization, or birth complications. No empirical research has been conducted on single-limb support (SLS) balance or joint kinematics during stair locomotion in pregnant and postpartum females. The aim of this study was to quantify possible alterations to postural control and stair kinematics in advancing stages of pregnancy when compared to non-pregnant females. Methods: This cross-sectional study compared eighteen females, consisting of six non-pregnant controls, five 2nd trimester, four 3rd trimester, and three postpartum. Center of pressure excursion area data were obtained during static balance trials on a …

Associations Of Traffic Related Air Pollution With Physical Activity And Cardiorespiratory Health Outcomes In At-Risk Populations From El Paso, Texas, Juan Aguilera

Open Access Theses & Dissertations

Exposure to air pollution from traffic-related emissions is a considerable preventable cause of respiratory and cardiovascular diseases. However, the impacts on at-risk populations, such as children with asthma and low-income residents, are yet to be fully understood in the border city of El Paso, TX. This dissertation focused on the most common traffic-related pollutants which include particulate matter (PM2.5 and PM10), nitrogen dioxide (NO2), and ozone (O3). The research described in this work provides an overview of air pollution measurements and shares insights from three different studies in our region.

People with asthma are more likely adversely affected by traffic …

Synthesis Of Nanotemplated, Glucose-Derived Adsorbents For The Removal Of Organic And Inorganic Pollutants From Water, Luis Alfonso Barrera

Open Access Theses & Dissertations

With an ever-present rise in population, along with an increase in industrial and manufacturing plants, contamination of potable water has become a global concern. While water treatment facilities exist which can help with the purification of water from bacterial and organic contaminants, these facilities are expensive to set in place and maintain. Therefore, in impoverished areas, point of use (POU) purification systems are often preferred, such as filters made from activated carbon. These filters are inexpensive and relatively easy to install and use. However, while activated carbons generally display excellent adsorption capabilities towards organic contaminants, their adsorption towards inorganic pollutants …

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 …

Method Development For The Analysis Of Fatty Acids In Adipose Tissue Using Stir Bar Sorptive Extraction Coupled With Gas Chromatography-Mass Spectrometry, Angela Marisol Encerrado Manriquez

Open Access Theses & Dissertations

The project was aimed to develop an easy and sensitive analytical tool to study the role of fatty acids (FAs) profile in periprostatic adipose tissue (PPAT) and prostate cancer (PCa). PCa is the second leading cause of cancer-related death among American men. Although obesity has been mostly ruled out by many researchers as a risk factor for developing PCa, it has shown to be associated with PCa metastasis and progression. Periprostatic adipose tissue, which was present on 48% of prostatic surfaces, has been reported to act as energy sources for facilitating a positive microenvironment for PCa tumor progression. To understand …

Ketamine Pre-Exposure Does Not Influence Later-Life Responses To Reward-Related Stimuli In Female C57bl/6 Mice, Israel Garcia

Open Access Theses & Dissertations

Preclinical work indicates that exposure to traditional antidepressant medications, in adolescent and adult female subjects, alters reward-related behavior later in life. In recent years, the anesthetic ketamine (KET), now used as a fast-acting antidepressant, has shown promising therapeutic efficacy for the management of depression. However, the potential long-term behavioral consequences of KET exposure across development have not been thoroughly assessed. Thus, to address this issue, we examined if KET exposure, during adolescence or early adulthood, results in enduring alterations in responsivity to the rewarding properties of sucrose and cocaine later in life. Specifically, female C57BL/6 mice were randomly assigned to …

Cellular Response Of Metallic Materials And Microstructure Entropy Guided Understanding Of Strength In Biomedical Austenitic Stainless Steels, Na Gong

Open Access Theses & Dissertations

Austenitic stainless steels and cobalt-chrome alloys are used to fabricate biomedical devices with good mechanical strength, excellent wear and corrosion resistance. Cellular activity of Zr-modified Co-Cr-Mo alloys and osteoblast functions on Cu-containing and Cu-free austenitic stainless steel were studied. Experiments on the influence of Zr addition to Co-Cr-Mo alloys and Cu-containing austenitic stainless steel clearly demonstrated that cell adhesion, proliferation and cell-substrate interactions were favorably modulated in the presence of Zr and Cu. Additionally, stronger vinculin focal adhesion contact and signals associated with actin stress fibers together with extracellular matrix protein, fibronectin, were observed. Furthermore, comparative studies on the effect …

Weather Prediction: Improving Accuracy Using Data Mining And Forecasting Techniques, Pedro Marquez

Open Access Theses & Dissertations

This study is focused to provide the insights of weather to understand the significance of weather changes in any parameter. Weather forecasting contributes to the social and economic welfare in many sections of the society. Weather is extremely difficult to predict because it is a complex and chaotic system. This means that small errors in the initial conditions of a forecast grow rapidly and affect predictability. Nowadays, massive real-time data is being generated by IoT devices, radars, weather stations, and satellites. The need to adopt big data analytics in IoT applications is compelling. These two technologies have already been recognized …

Quantifying Spatiotemporal Patterns Of Past And Future Urban Trends In El Paso, Tx And Their Impact On Electricity Consumption Using Nlcd Data And The Ca-Markov Model, Joanne Michelle Moyer

Open Access Theses & Dissertations

As cities continue to grow, their urban form continues to evolve over. Understanding this evolution allows for planners, engineers, and decision makers to plan for a sustainable community. Change analysis was conducted for El Paso, Texas county to determine the areas of growth within the past 15-years (2001-2016). The results indicate that growth has primarily occurred within the city of El Paso, in particular Districts 5 (east side), 1 (west side), and 4 (northeast), with District 5 experiencing substantial growth. Developed sub-categories medium and High intensity experienced the fastest growth, which represents single-family housing and compact/commercial areas. However, landscape metrics …

Life Cycle Studies To Evaluate The Physiological And Biochemical Effects Of Copper Oxide And Surface-Coated Titanium Dioxide Nanoparticles On Green Onion (Allium Fistulosum) And Carrot (Daucus Carota L.) Plants: Insights Utilizing Two-Photon Microscopy And Spectroscopy, Yi Wang

Open Access Theses & Dissertations

With the recent increase of nanomaterial production, nano copper oxide (nCuO) and surface-modified titanium dioxide nanoparticles (nTiO2) are among the most widely applied nanoparticles in industry and daily lives. Their use has resulted in accumulation in soils as a consequence of their direct or indirect release. Hence, these NPs may raise a potential risk to crops cultivated in soils. Moreover, the physiological effects of nCuO on green onion (Allium fistulosum) and surface-coated nTiO2 on full-grown carrot (Daucus carota L.) are still unknown. Green onion is characterized by its high content of the antioxidant allicin, and carrot is a worldwide economic …

Effect Of Flow Velocity And Geometry On The Signal From A Piezoelectric Flow Rate Sensor, Jad Gerges Aboud

Open Access Theses & Dissertations

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Multiple Change-Point Modeling Of Degradation Signal For Prognostics Improvement, Yuxin Wen

Open Access Theses & Dissertations

To fulfill the increasing demand on functionality and quality, modern engineering systems are usually built with overwhelming complexities. The more complex functions the system has been built, the higher reliability required of the system. This is mainly due to the fact that a single failure can result in catastrophic consequences. Therefore, methods that can predict and prevent such catastrophes have long been explored. Prognostics refer to the process of evaluating the current health of a system or a component and then predicting the remaining useful life (RUL) based on the information collected through condition monitoring. The fast development of information …

Who Is Willing To Speak Up And Why? Examining Individual And Organizational Predictors Of Employee Voice Behavior In Higher Education Institutions, Jessie Socorro Arellano

Open Access Theses & Dissertations

Employee voice behavior is central to the effectiveness, the development, and the adaptability of organizations to their environments. However, there is currently limited organizational research and knowledge on the factors that influence employee voice behaviors, especially in the context of higher education institutions. As such, the purpose of this study is to examine the predictors of employee voice behaviors in institutions of higher education. Specifically, this study examines the impact of key individual and organizational factors such as alumni status, organizational commitment, work motivation, communication climate, and organizational politics on employees' expression of promotive and prohibitive voice in higher education …

Using Machine Learning On An Imbalanced Cancer Dataset, James Ekow Arthur

Open Access Theses & Dissertations

With an estimated 1.4 million cancer diagnosis worldwide and the increasing death of cancer patients. It is prudent to investigate methods, approaches and smarter ways of predicting and diagnosing of cancer so that a holistic techniques can be used to curb or reduce false predictions , increase exact predictions and also meticulos prognosis information .

Can a feasible technique be developed for the general problem of prognosis and diagnosis of cancer be developed ?

We will show here that this problem of cancer prognosis and diagnosis can be efficiently tackled with the aid of machine learning techniques and the best, …

Glacier Segmentation In Satellite Images For Hindu Kush Himalaya Region, Bibek Aryal

Open Access Theses & Dissertations

Climate change poses a risk to individuals whose livelihoods depend on the health of glacier ecosystems. Monitoring glaciers in the Himalayan Hindu Kush (HKH) region is of high importance especially when we consider the impact of recent climate change on them. Our work aims to provide an automated method to outline glaciers using machine learning techniques and publicly available remote sensing imagery.In this work, we present ways to delineate glaciers from Landsat-7 imagery using various machine learning and computer vision techniques. The multi-step methodology that we present in this work is generalizable across different types of satellite and overhead imagery, …

Identification Of Interkingdom Interactions Of Cryptococcus Neoformans In Pigeon Excreta Using Next Generation Sequencing, Marlynn Cadena

Open Access Theses & Dissertations

Cryptococcus neoformans is an encapsulated fungus with worldwide distribution and associated with pigeon excreta. C. neoformans causes pulmonary cryptococcosis in immunocompromised populations, which results in high mortality. C. neoformans main virulence factor is its polysaccharide capsule that confers the fungus with the ability to form biofilms. Interkingdom interactions can have a positive, neutral or negative effect on C. neoformans in relation to its virulence and/or pathogenicity. C. neoformans survival within polymicrobial and other challenging communities has been shown to affect the evolution of its virulence factors. For example, the size of C. neoformans polysaccharide capsule is modulated during interactions with …

The Dynamic Transition Of A Vertical Take-Off And Landing Drone, Luis Carlos Calvo Jr.

Open Access Theses & Dissertations

Unmanned aerial vehicles, or UAVs, are small pilotless aircrafts that are remotely controlled through a ground control station. They have increased in popularity because of their applications and the advantages that each UAV can provide based on their need. There are many types of UAVs, but this study focuses on a type of Vertical Take-Off and Landing (VTOL) UAV that is known as the Albatross UAV. This UAV was manufactured by a company known as Applied Aeronautics, and configurations were made to change the fixed-wing (FW) UAV to a VTOL UAV. This study was done to find methodologies to simulate …

Women In The Legislature's Impact On Economic Growth And Women's Labor Force Participation, Ashley Elizabeth Docherty

Open Access Theses & Dissertations

This Thesis analyzes whether women in the legislature improve economic growth and womenâ??s participation in the labor force. The number of women in national legislatures and parliaments has increased dramatically in the past thirty years as over half of all countries have implemented gender quota laws. When women join the legislature, government spending on education and healthcare tends to increase. This leads to an increase in economic growth. Economic growth, along with the visibility of women in government, helps more women participate in the labor force. Women in government have a descriptive and substantive effect on womenâ??s economic empowerment. This …

Faculty Attitudes And Perspectives About Community Engaged Scholarship At An Engaged Institution, Azuri Lizeth Gonzalez

Open Access Theses & Dissertations

Community engaged scholarship has become a method for higher education institutions to respond to public and societal needs. Decades into the establishment of the "engaged institution," studies reveal that higher education presents challenges for faculty to effectively succeed in academia while pursuing a community engaged scholarship agenda. This study employs the use of a constructivist grounded theoretical approach to explore faculty attitudes and perspectives on community engaged scholarship and the role the engaged intuition may have in their views. This study found that faculty were introduced to the term by their institutions but their views and understanding of community engaged …