Digital Commons Network^™

Ultrasonic Neuromodulation In Vitro At Single Neuron Resolution, Sheikh Ilham

Master's Theses

Ultrasound as a widely used imaging means for medical diagnosis has drawn growing interests as a potential noninvasive neuromodulation strategy. Focused pulsed ultrasound effectively modulates neural encoding and transmission functions especially in the peripheral nervous system (PNS) with unclear mechanism of action, which is further confounded by contradictory experimental outcomes. Lack of convincing experimental methods has hindered our mechanistic understanding of ultrasonic PNS neuromodulation. To address that, we developed a novel in vitro set up to achieve simultaneous single-unit recordings from individual mouse sciatic nerve axon and systematically studied the effect of focused pulsed ultrasound (FPUS) on action potential transmission …

Characterizing Basement Structures To Evaluate Their Influence On Overlaying Sedimentary Layers: Case Study Of Three Fields In The Central Kansas Uplift, Muhammad S. Karim

Master's Theses

Potential field and well log data were used to investigate basement features and the overlaying sedimentary layers across four counties in the Central Kansas Uplift. The objective of this study was to (1) investigate and determine the orientation of basement structures/features, (2) estimate the depth to basement, and (3) examine the influence (if any) and relationship between the basement features and the overlaying sedimentary deposits of three oil fields in the study area. Aeromagnetic data was used to interpret and map basement features by applying derivative filters. Well log data was used to pick formation top values and create contour …

Factors Associated With Violence Against Women In Rural India, Jennifer Lardner

Master's Theses

No abstract provided.

Preparation And In Vitro Characterization Of An Integrated Graft System For Regenerative Engineering, Mohammed Barajaa

Master's Theses

No abstract provided.

Language Abilities In Single- And Dual- Language Learners With Autism Or Other Developmental Disorders, Yael Dai

Master's Theses

Parents and providers worry that exposure to two languages will impair language acquisition in children with autism spectrum disorder (ASD) or other developmental delays (DD). However, limited research to date suggests that language milestones and abilities are unaffected. The current study explored language abilities in toddlers with ASD or DD exposed to one versus multiple languages, prior to any intervention. Results showed slower language acquisition in ASD than DD but no main effect of language exposure group or interaction of language group by diagnosis. This study suggests that bilingual parents can communicate with their children in both languages without harm …

Acceptability And Correlates Of Pre-Exposure Prophylaxis Use For Hiv Prevention Among High-Risk Drug Users In Treatment, Pramila Karki

Master's Theses

Background

Although people who use drugs (PWUD) are a key population recommended to receive pre-exposure prophylaxis (PrEP) to prevent HIV, few data are available to guide PrEP delivery in this underserved group. We therefore examined the willingness to initiate PrEP, the anticipation of HIV risk reduction while on PrEP, and the acceptability of PrEP based on a number of known PrEP attributes among high-risk PWUD.

Methods

In a cross-sectional study of 400 HIV-negative, opioid dependent individuals enrolled in a methadone program and reporting recent risk behaviors, we examined independent correlates of being willing to initiate PrEP. Participants also ranked the …

Human Dimensions Of Timber Rattlesnake (Crotalus Horridus) Management In Connecticut, Lindsay Keener-Eck

Master's Theses

No abstract provided.

Factors Influencing Maternal Involvement In Early Childhood: Exploring The Roles Of Maternal Stress And Children’S Narrative Representations Of Mothers, Rahmet Akpolat

Master's Theses

For children from low-income families, parent school involvement can be a crucial protective factor that supports children’s cognitive and emotional development. The present study seeks to explore how maternal stress in early childhood is associated with mothers’ later school involvement and whether children’s internalized positive, disciplinary and negative maternal representations act as potential mediators of this relationship. Currently, little research has been done on the contextual factors influencing parent school involvement in early childhood and this study aims to fill this gap in the literature. The data included 169 children and mothers from low-income families. Mothers completed questionnaires designed to …

Analysis Of A Newly Digitized Long-Term Dataset Of Environmental Observations From Long Island Sound, Jacob Snyder

Master's Theses

Project Oceanology, a non-profit oceanographic educational organization has been collecting data including pH, oxygen, and temperature conditions as well as abundances of benthic invertebrates and near-shore fish catches since 1972 from Eastern Long Island Sound. These data had been stored solely on single-copy paper sheets and were therefore inaccessible to analysis. I digitized more than 100,000 abiotic measurements and 50,000 species abundance and size data collected over the past 45 years, and developed a web-based SQL database housed on the Long Island Sound Integrated Coastal Observing System (LISICOS) server. The database will ultimately become a searchable, downloadable, user-friendly web-based tool …

Enhancing Icvd Modification Of Electrospun Membranes For Membrane Distillation Through A 3d Printed Scaffold, Nicole Beauregard

Master's Theses

In this work, initiated chemical vapor deposition, iCVD, is used as a modification technique for electrospun membranes. Electrospun membranes are often hydrophilic and cannot be used in membrane distillation which requires high hydrophobicity. In membrane distillation, a thermal driving force is supplied to create a vapor pressure difference across a membrane allowing vapor molecules to pass through while rejecting liquid and solids. iCVD can be used to conformally coat the individual nanofibers with a hydrophobic polymer to render the membrane viable for the MD process. The standard coating procedure uses natural convective diffusion as the method of transport of the …

Articulated Indigeneity And Tourism In HawaiʻI, Erika Nielsen

Master's Theses

The guiding research question for this thesis asks how Hawaiian indigeneity and self-determination are articulated within tourism spaces in Hawaiʻi. This thesis research works to uncover the nuanced ways that Hawaiian indigeneity is employed to manage and regulate tourism activities in Hawaiʻi. I seek to question the narrative that Hawaiians consent to, and prosper from, the largely unregulated mass tourism complex that has become a focal point of the post-colonial state. Native Hawaiians have actively resisted the erosion of their culture, lands, and nation through strategies that employ multiple understandings of indigeneity. We should not assume that the tourism industry …

Traditional Ecological Knowledge In Collaborative Forest Restoration In The Sierra Nevada, Michael Boero

Master's Theses

Forest restoration in the Sierra Nevada is receiving increased attention due to climate change, increasing populations in the wildland-urban interface, and the historical mismanagement of some forests, evidenced in part by the increasing frequency and severity of wildfires in recent years. In response to an urgency to implement restoration in the absence of consensus on the best ways to proceed, public land managers practice collaborative management approaches to ameliorate antagonism between stakeholders and allow restoration projects to proceed when agreement is difficult to achieve. Stakeholders often include representatives from local community groups, environmental organizations, private industry, and—notably—tribal groups, who hold …

Portrait Of A California Mystic, Lisa Francesca

Master's Theses

This book is about Helen van Löben Sels, an automatic writer born in the late nineteenth century, who was my great-grandmother. It explores a part of her life during which her writing was inspired by a spiritual or subconscious agency rather than by her conscious intention. I describe her childhood as an East Coast publisher’s daughter, and her career as a California ranch wife and mother to discern what might have precipitated her mediumship. By exploring cardboard boxes filled with her papers, family memoirs and other sources, I found that an inherited propensity to write, the difficulty of being heard …

The Sediment Analysis Of A Prehistoric Shell Midden From Nevis, West Indies, Erika Harvey

Master's Theses

Archaeology in the Caribbean is a growing area of research. The last few decades have revealed a series of Ceramic Age sites +600BCE - 1620CE along the Windward coast of Nevis, West Indies. These sites must be excavated and examined soon, due to the effects of erosion and sea level rise. It is pertinent to explore and expand the knowledge of the prehistoric Carib peoples, if we are truly going to understand the history of the Caribbean. By bridging aspects of science and humanities through geoarchaeological methods, this project is aiming for an interdisciplinary approach to better understand the pre-Colonial …

A Full Factorial Analysis Of Polymerization Conditions Of Sodium Alginate Beads To Determine The Effect On Diffusivity And Concentration Limit Of Tryptophan And Glucose, Allison Schulkins

Master's Theses

The purpose of this work is to develop an experimental setup with associated mathematical analysis to analyze the changes in diffusivity through calcium alginate gel beads made under different polymerization conditions. The diffusivity of the solutes glucose and tryptophan was calculated by measuring the concentration change over time as solute diffused out of the alginate spheres and into the bulk. The alginate beads were generated using different polymerization conditions following a two-level, three-factor, full-factorial matrix with alginate concentration, cross-linker concentration, and cross-linking time as the factors. The diffusivities showed variations between different conditions, which were analyzed to determine the main …

The Common Lot Of Nature: The Stoic Concept Of Death In The Writings Of St. Ambrose, Nathan Michael Falls Hall

Master's Theses

The Common Lot of Nature is a comparative analysis which questions the completeness of St. Ambrose’s Christian faith. The comparison focuses specifically on notions of death, and how one should deal with its presence in one’s life. This emphasis was chosen because Ambrose was a Christian bishop who was heavily influenced by Stoicism, and these two worldviews held contrasting beliefs on how death fits into the lives of human beings. The paper begins with an outline of other research regarding Stoicism or its potential connections with Christianity. The following two sections discuss how Stoics and 4th century Christians conceptualized death …

Geophysical Characterization Of A Rare Earth Element Enriched Carbonatite Terrane At Mountain Pass, California Eastern Mojave Desert, Kevin Denton

Master's Theses

Mountain Pass, California, located in the eastern Mojave Desert, hosts one of the world's richest rare earth element (REE) deposits. The REE-rich rocks occur in a 2.5 km- wide, north-northwest trending zone of Mesoproterozoic (1.4–1.42 Ga) stocks and dikes, which intrude a larger Paleoproterozoic (1.7 Ga) schist-gneiss terrane that extends ~10 km southward from Clark Mountain to the Mescal Range. Several REE-enriched bodies make up the Mountain Pass intrusive suite including shonkinite, syenite, and granite comprising an ultrapotassic intrusive suite and the Sulphide Queen carbonatite body.

Two-dimensional modeling of gravity, magnetic, and electrical resistivity data reveals that the Mountain Pass …

Hmong In America: An Emergence Of The American Identity, Nkauj Hli Melinda Lo

Master's Theses

The historical background of the Hmong ethnic group and immigration in regards to how the emergence of the American identity has impacted their cultural identity is examined in this thesis. A qualitative study was conducted to better understand the impacts of immigration and the reasons that younger generations have pushed to be one with the American identity. Drawing upon 10 in-depth interviews of second-generation children of Hmong immigrants, the findings show that the Hmong identity has lost its preservation through the Hmong ethnic group’s experiences in the United States. The researcher found that the American identity affects the Hmong cultural …

Youth Sport Development Pathways And Experiences Of Ncaa Division I Women's College Soccer Players, Emily Hardell

Master's Theses

As youth sport has become increasingly professionalized, many believe that the route to elite level play is through early specialization. Early specialization is a contentious issue, and many risk factors have been associated with high levels and intensities of training in youth. Youth today participate in highly competitive sport in pursuit of elite levels of play, recognition, and financial gain. Early specialization is thought to be a requirement for advancement, yet little is known about the early experiences of team sport athletes who grew up in the US. This is the story of 15 elite female athletes who “made it” …

Preparation And Characterization Of A (Viologen) Containing Main Chain Peg-Carbon Nanotubes Phase For Hybrid Supercapacitor Application, Kanishka Rana

Master's Theses

Supercapacitors (SCs) and batteries are recognized as the two most important electrical energy storage devices. SCs have some distinct advantages such as high-power density and long cycle life when compared to batteries. However, they have yet to match the energy densities of batteries. In an effort to improve the energy density of SCs, a hybrid supercapacitor was developed using a pair of single-walled carbon nanotube electrodes and two polyethylene glycol (PEG-400) gel-polymer electrolytes (GPEs) containing redox additives of viologen (V) and ferrocene dicarboxylic acid (Fc), respectively. The introduction of V and Fc, was expected to improve the energy performance of …

Eductional Persistence In Latino Male Students Attending University: Their Experiences And Identity Development, Michelle Swartz

Master's Theses

Because Latino male students have lower graduation rates from high school and postsecondary institutions than other demographic groups have, this qualitative research study examined the psychosocial experiences that influence the development of educational persistence. To this end, eight Latino male undergraduate students, who are also low-income and first-generation students at San José State University, participated in semi-structured interviews in which they discussed their identities and school experiences. An analysis of the eight interviews shows how these students made meaning of their education, gender identity, and ethnicity. The constant comparative method for analyzing interview transcripts revealed the following themes: (a) the …

Developmental Effects Of Nicotine Exposure In Drosophila Melanogaster, Lisa Janet Wong

Master's Theses

Approximately 12%-20% of pregnant women smoke at some point during pregnancy, and 10% of pregnant women are reported to have smoked during the last 3 months of pregnancy. Smoking during pregnancy leads to developmental health risks for the fetus and child, including increased mortality, low birth weight, and developmental delays. The direct molecular targets of nicotine are nicotinic acetylcholine receptors (nAChRs) due to the similarities in structure between nicotine and acetylcholine. However, in many cases, it remains unclear what molecular events downstream of nAChRs lead to the deleterious effects of nicotine on development. We have established Drosophila melanogaster as a …

Community Structure And Zonation Of Antarctic Benthic Invertebrates: Using A Remotely Operated Vehicle Under Ice To Define Biological Patterns, Dorota Szuta

Master's Theses

The Ross Sea, Antarctica is a deep bay of the Southern Ocean that exhibits seasonal sea ice and is adjacent to a permanent ice shelf overlying seawater. In 2008 and 2009, imagery of the seafloor under the McMurdo Ice Shelf and under the seasonal ice in the Ross Sea was collected via remotely operated vehicle (ROV) at depths to 300 m. Distinct differences in Antarctic benthic communities were observed over multiple environmental gradients. Species abundance typically exhibited a unimodal distribution with depth with mid-depth peaks, reflecting a food limitation at the deep end and potentially ice disturbance on the shallow …

Effect Of Land Use Types On The Distribution Of Carnivore Species In Santa Clara County, Ca., Logan Thompson

Master's Theses

Anthropogenic pressures such as habitat loss and hunting pressures have caused terrestrial mammalian carnivores to decline by 95–99% in many regions of the world. These species are especially susceptible to fragmented habitats and a diminishing food supply because of their slow reproductive rates and high metabolic demands. In biodiversity hotspots such as California, understanding the range of human impacts to species is critical. This project assessed carnivore species distribution and occupancy by placing remote camera traps in a protected Reserve, agricultural, and developed land use types. Mountain lions were only detected in the protected Reserve, and because of this coyotes …

Urbanization, Land Rights And Development: A Case Study Of Waterfront Communities In Lagos, Nigeria., Gideon Olaniyi Omoniyi

Master's Theses

The aim of this study is to examine the root causes of forced evictions and displacement through the current urbanization process in Lagos, Nigeria. My particular attention is devoted to the legal complexities and how ethnolinguistic identities shape land laws, influence land tenure, and construct urban citizenship. Through this process, competing claims to land ownership provide fertile ground for forced evictions and displacement. Existing scholars suggest that poor urban residents lack rights to stay in their neighborhoods, while a powerful capitalist class has emerged and dispossessed the poor from their lands. Yet these existing approaches derived from the neoclassical and …

A Novel Model Of “Remedy And Elimination Of Tuberculosis”, Akanksha Mishra

Master's Theses

Tuberculosis (TB), is one of the top ten causes of death worldwide. TB is commonly linked to poverty and creates poverty as it is the single largest cause of death in the 15-49-year-old age group in South-East Asia (WHO, 2017). It is also linked to the HIV population, and its leading cause of death. TB is effected by socio-economic factors, cultural factors, and health policy. My goal of this dissertation is to identify systematic approaches that shall support the mission set by World Health Organization (WHO): to eliminate TB globally by the year 2050. Measures might include addressing social barriers …

Examining A Hierarchical Linear Regression Model Of Overgeneral Memory: Methodological Issues, Car-Fa-X Model Mechanisms, And Memory Encoding As Represented By Cognitive Attributional Style, Carrie Adrian Davis

Master's Theses

Overgeneral memory (OGM) is a phenomenon of reduced autobiographical memory specificity observed in major depressive disorder (MDD) and post-traumatic stress disorder (PTSD). Individuals demonstrating OGM tend to describe past events generally rather than specifically recalling single memory occurrences. Research shows that OGM is perpetuated by three mechanisms: capture in the memory hierarchy due to trait rumination (CaR), functional avoidance of specific memory retrieval (FA), and impaired executive control (X), which together make up the CaR-FA-X model of OGM. Research on the CaR-FA-X model has historically looked at each mechanism in isolation. The current research aimed to compare the contributions of …

Authentication And Encryption Of Aerial Robotics Communication, Maojie Han

Master's Theses

As designed to accept custom modules, autonomous aircrafts has developed into a fast-paced industry. The remote-control system of aerial robotics is typically based on wireless communications methods, such as 2.4 GHz, 5.8 GHz, or Wi-Fi. Because the services vary with the communication method, users face different kinds of cybersecurity challenges. This thesis provides an innovative solution for the authentication and security methods in proposed aerial robotics communication network. The thesis begins with an introduction to RF drone communications. After a discussion of the MAV Link communication protocol, the thesis will focus on the differences between the existing one-to-one network and …

The Resisters: Contemporary Ethiopia Through A Feminist Lens, Eldana Mathias Temesgen

Master's Theses

Based on the recent mass protests in Ethiopia, there is a strong indication that the Oromo people of Ethiopia, who are at the forefront of these protests, have been placed in a position of marginal importance, influence and power in their society. Due to the power and agency wielded by the government, some ethnic groups in Ethiopia, including the Oromo ethnic group, claim to be underrepresented on a political, economic, and social scale, which has led to conflict.

The nuances of ethnic based conflict, such as the situation in Ethiopia, have been tackled through several disciplines and examined through different …

Dadaab’S Hidden Ties: How Colonial Legacies And Informal Economies Contribute To Protracted Refugee Situations, Katherine Landberg

Master's Theses

Protracted Refugee Situations (PRS) persist despite the founding intentions of the international refugee regime. Explanations behind PRS typically focus on international law, human rights, and security concerns, while the conventional media narrative presents an oversimplification that erases complex contextual nuances. Using the case of the Dadaab refugee camp, I explore (1) historical colonial legacies of social control and domination in Kenya, and (2) Dadaab as an informal economic power center, as two ‘hidden ties’ that contribute to Dadaab’s persistence. By identifying and exploring hidden ties that contribute to PRS, policy-makers and power brokers gain a deeper understanding of the realities …