Digital Commons Network^™

Nanosatellite Probes In Interplanetary Space: An Augmented Cassini Mission, Trent T. Voris

Master's Theses

The exploration of interplanetary space is one of the most challenging and costly ventures in human history. The relatively low amount of information on other sites beyond Earth is largely due to the rarity of effective trajectories as well as the high levels of risk and complexity inherent in innovative space exploration. One solution to this lack of information is the use of deployable satellite probes to help augment the main mission and its instrumentation. This “Mother- Daughter” architecture allows for the low-cost exploration of hazardous sites and numerous points of interest without compromising the primary mission.

While the end …

Trpinav: A System For Terrain, Route, Points Of Interest, And Navigation, Lana Hodzic

Master's Theses

Maps are as fundamental to society as language and the written word. Maps are an abstraction of reality that help people to better understand the world around them. Route maps, specifically, depict a path from one place to another. Many route maps generated today contain excessive information making it difficult for people to process visually. Previous work has been done in generating routes, searching for nearby points of interest, and path generalization. This thesis proposes a system, TRPINav, that will integrate terrain data, route data, points of interest, and navigation in a cartographic visualization. This prototype navigation application includes a …

Incorporating Histograms Of Oriented Gradients Into Monte Carlo Localization, Michael K. Norris

Master's Theses

This work presents improvements to Monte Carlo Localization (MCL) for a mobile robot using computer vision. Solutions to the localization problem aim to provide fine resolution on location approximation, and also be resistant to changes in the environment. One such environment change is the kidnapped/teleported robot problem, where a robot is suddenly transported to a new location and must re-localize. The standard method of "Augmented MCL" uses particle filtering combined with addition of random particles under certain conditions to solve the kidnapped robot problem. This solution is robust, but not always fast. This work combines Histogram of Oriented Gradients (HOG) …

Trust And Complacency In Cyber Security, Ashley Allison Cain

Master's Theses

Improved understanding of conditions that foster appropriate use of security tools by cyber security professionals is crucial for protecting companies from financial losses. Trust has been an important topic in the literature because of its role in allowing for cooperation among humans and automation and because of its relationship with appropriate use. The current study aimed to extend the finding that high trust leads to complacency in the domain of cyber security and to clarify a discrepancy in the literature about complacency’s operationalization by measuring information sampling behaviors directly. The sample consisted of 101 first year psychology students. The independent …

Perceived Organizational Support And Perceived Supervisor Support As Antecedents Of Work Engagement, Kelista Lea Burns

Master's Theses

Research has examined how providing employees with support through the organization and its supervisors is related to beneficial workplace outcomes. However, the use of nearly identical scales in measuring perceived organizational support (POS) and perceived supervisor support (PSS) might have led to consistent correlations and redundancies between the two constructs. To explore whether these scales are problematic in measuring POS and PSS, the purpose of this study was to develop and test new measures of POS and PSS designed to capture the unique characteristics of each construct. Additionally, organizations have become particularly interested in the benefits of work engagement; more …

The Effects Of Online Course Pedagogies On Learning And Cognitive Workload, Kallan Kay Christensen

Master's Theses

The use of recorded lecture video is a common online practice, although the implementation of this pedagogy varies and may have differential impacts on learning depending on the extent to which it increases cognitive workload. This study compared two different online statistics lecture formats: interactive and non-interactive. The interactive lecture video stopped approximately every minute and the participant had to answer a question regarding the material before moving on to the next section of the video. The non-interactive lecture video was the exact same video edited to remove all interactive breaks in the video. Cognitive workload was measured using the …

The Role Of Bed Shear Stress In Sediment Sorting Patterns In A Reconstructed, Gravel Bed River, Samuel Emerson

Master's Theses

The role of bed shear stress in bed surface grain size sorting was investigated on a reconstructed reach of the Merced River in the Central Valley of California. Pebble count data were collected at the inside, middle, and outside of ten bends in April 2015 and compared to data from pebble counts conducted in previous years. Output from a previously developed 2D flow model (FaSTMECH) was compared to critical shear stresses calculated from median grain-size data. Comparison of pebble count results from 2002 through 2015 showed that there was no temporally consistent pattern of coarsening or fining along the study …

Variation In Adrenal And Thyroid Hormones With Life-History Stage In Juvenile Northern Elephant Seals (Mirounga Angustirostris), Jennifer Jelincic

Master's Theses

Interpretation of stress responses in wildlife is inadequate due to the range of natural variation and potential confounds of individual and life-history variables. In marine mammals, endocrine response data are sparse and variable across species. Blood adrenal and thyroid hormones were measured in 144 chemically immobilized yearling elephant seals at Año Nuevo State Reserve to characterize variation between sexes and across semiannual haul-outs. There was no relationship between hormone concentration and time needed for collecting blood or diel pattern, suggesting that concentrations represented baseline values. Serum cortisol concentrations did not vary with gender or across fasts but increased dramatically during …

Intercolony Comparison Of Diets Of Western Gulls In Central California, Anne L. Cassell

Master's Theses

As human populations expand, they force free-ranging animals to adapt to an increasingly urban environment, resulting in changes in diets, reproductive success, and mortality. The diets of two western gull (Larus occidentalis) breeding populations in central California were compared. One colony, Año Nuevo Island (ANI), is 1 km from shore and within 30 km of a municipal landfill. The other colony, Southeast Farallon Island (SEFI), is located 45 km off the shore of San Francisco, CA. Given the proximity of ANI to the shore and the landfill, I predicted that gulls from ANI would have more garbage in their diets. …

Juana Alicia: A Case Study Of The Artist As Critical Muralist, Allison Ann Connor

Master's Theses

Much has been written on Mexican Muralism and on the resurgence of mural art in the United States, and Chicana/o murals in San Francisco in particular, but very little has been written about mural artist Juana Alicia specifically, and none of this material has been gathered into one document. This study focuses on Juana Alicia as an important community-educator-artist-leader-activist, what educator and mural artist Arturo Rosette defines in his doctoral dissertation as a “critical muralist.” In particular, this study analyzes Juana Alicia’s 2012 mural, The Spiral Word, and places it within the context of mural art that functions as activist …

Effects Of Global Change On Algal Biomineralization And Benthic Community Interactions On California's Temperate Rocky Reefs, Emily Marie Donham

Master's Theses

Marine ecosystems are threatened by CO2-driven global change, such as ocean warming and acidification (OA). The primary objectives of this study were to: 1) assess the response of the coralline red alga, Calliarthron cheilosporioides, to global change; and 2) investigate the responses of California’s kelp forest communities to OA and sea urchin grazing. Results indicated that C. cheilosporioides growth and calcification were reduced under both increased temperatures and increased pCO2 despite increased photosynthetic rates in high pCO2 conditions. Mineralogy did not differ among treatments as a function of warming or acidification. Differences were observed in Mg incorporation into calcified walls …

Effects Of Substrate Warming On Sessile Marine Invertebrate Communities In Monterey Bay, California, Stephen Loiacono

Master's Theses

Increasing average global sea temperatures are one of the most direct and alarming consequences of climate change, yet it is still unclear how sessile marine communities will respond in the near- and long-term. In addition, it is unclear if warming ocean temperatures will facilitate marine invasions or primarily benefit native species. To simulate the effects of increasing ocean temperatures on sessile communities, heated settlement plates (n=7) were used in an in situ field experiment to investigate how an increase in substrate temperature (2.5°C above ambient) would affect recruitment and community development as compared to unheated control plates (n=9). Experimental treatments …

Treatment Of Sk-Mel-28 Cells With R-Moj-Dm Upregulates Pro-Apoptotic Genes P53 And Tnf-B While Downregulating Oncogene C-Myc, Melissa Lombardo

Master's Theses

Cell death by apoptosis is the result of one or multiple signaling pathways that can be initiated inside or outside the cell for a variety of reasons. Integrins, expressing themselves on the cell surface, play a central role in some apoptotic pathways. Cancer cells have been known to bypass this function and upregulate survival factor genes in order to elude apoptosis and thrive in the body, thus creating an environment in which it is possible for them to grow and metastasize. Previously in Dr. Soto’s lab, a recombinant disintegrin mutant, r-Moj-DM, was shown to induce apoptosis in melanoma cell line …

A Qualitative Investigation Of Usa Weightlifting Facebook Follower Engagement During A World Event, Dora Gyulai

Master's Theses

The current case study explored USA Weightlifting’s Facebook use during a world event. Research questions were developed to guide a study through which the author investigated how USA Weightlifting utilized Facebook for advertising purposes, to encourage fan engagement, and to encourage brand community amongst customers interested in weightlifting at the international level. I used qualitative content analysis and collected data from the organization’s Facebook page, utilizing the Facebook Insights tool. By examining Facebook posts by type (photo, video, link) and engagement (likes, shares, comments), I developed a hierarchical categorization of the types of Facebook actions taken by USA Weightlifting. Based …

A Biomechanical Analysis Of Different Anterior Cruciate Ligament Surgical Techniques, Spencer T. Warshauer

Master's Theses

Anterior cruciate ligament (ACL) tears are one the most prevalent activity-related injuries among young athletes in the United States. ACL surgeries are typically done using patellar tendon graft and hamstring tendon graft. The goal of the study was to compare the aforementioned ACL surgery techniques. In addition to this, a secondary goal was to provide physical therapists and patients with real-time feedback about the progress of the recovery over time when performing a common physical therapy exercise regimen. Each subject visited the lab six times for twelve weeks and was asked to perform chair squats, three sit-to-stand exercises, and walk …

Testing Ostrom: An Analysis Of Water User Committees In Uganda, Emily Mcpartlon

Master's Theses

In 2009 Elinor Ostrom received the Nobel Prize for her analysis of economic governance of the commons. Specifically, by challenging the conventional wisdom at the time, demonstrating how communities can successfully manage the common resources without any regulation by central authorities or privatization. Ostrom proposed eight design principles that identify the underlying criterion of institutions that have successfully maintained CPRs over time. I examine whether Ostrom’s Eight Design Principles affect the long-run functionality of borehole wells in Uganda using quantitative methods. I find that the one of the principles, clearly defined boundaries, is significant in all four estimations, and remains …

Traditional Agricultural Practices And Sex Ratios At Birth In Modern Times, Patrick Krause

Master's Theses

This study examines the impact of cultural gender norms created by differences in traditional agricultural practices on observed sex ratios at birth over last four decades. Building on the plough hypothesis developed by Ester Boserup and the work of Alesina et al. (2013), this study provides a further empirical test of the legacy of the plough. I perform empirical analysis on micro level data from the Demographic and Health Survey in over 75 countries to develop a number of stylized facts on this relationship. Descendants of plough societies exhibit a more male skewed sex ratio at birth today. These descendants …

Educational Opportunities For Adolescent Girls' Empowerment In Developing Countries, Mary J. Kober

Master's Theses

Adolescent girls’ in developing countries coming from impoverished backgrounds face the added challenge of societies that marginalize the value of education for girls. Complex economic, social and cultural barriers to access secondary education pose challenges and obstacles to their human rights to education, equality and dignity. This study provides an analysis of the relationship between education and empowerment by looking at five innovative non-governmental formal and non-formal educational programs in Guatemala, sub-Saharan Africa, and Bangladesh. The theoretical framework focuses on the empowerment process, transformative agency, intrinsic empowerment, and the conditions and competencies that support education and leadership. The purpose of …

Air Pollution, Temperature And Cognitive Performance In The Short Run: Evidence From Women’S Ability To Recall Dates, Ke Yang

Master's Theses

Abstract: Cognitive performance is important to productivity across many fields and potentially correlated to air pollution and extreme temperatures. We study the effects of daily ambient air pollution and monthly temperature on women’s ability of recalling dates across 42 developing countries from 1997 to 2009. We use an estimated natural air pollution data, and calculate the AQI to get an aggregate effect of air pollution. We find that one standard deviation increase in the AQI leads to a statistical decrease in women’s probability to recall dates such as birthdays, marriage date or children’s birthdays by 0.44 percentage point. Furthermore, there …

Air Pollution And Fetal Loss In The Global Tropics, Shuqiao Cheng

Master's Theses

Abstract: Recent work has shown that in-utero air pollution has negative effects on both contemporaneous birth outcomes and long-term human capital outcomes. However, only a few studies explore the effects of in-utero exposure to air pollution on fetal loss, and none of the studies has been done in developing countries. In this study, we examine the impact of naturally caused CO and PM 2.5 on reproductive outcomes in 40 developing countries from 1997 to 2009. We present childbirths and birth gender as measures for potential fetal losses. The richest model identified using variation in pollution between pregnancies with controlling for …

Behavioral Determinants Of Biofortified Food Acceptance: The Case Of Orange-Fleshed Sweet Potato In Ghana, Chinonso E. Etumnu

Master's Theses

Biofortified foods are being introduced in sub-Saharan Africa as an important strategy to help address micronutrient malnutrition. However, there has been little research on factors that could play decisive roles in their successful introduction. This paper investigates the determinants of consumer acceptance of biofortified orange-fleshed sweet potato (OFSP) using data from a choice experiment conducted in Ghana. I find that OFSP is preferred to traditional white-fleshed and yellow-fleshed sweet potatoes as indicated by consumers' marginal willingness to pay for the three varieties. I also find that respondents' socio-economic characteristics do not have a significant effect on consumer acceptance of OFSP. …

Dendrimer Modified Silica Nanoparticles As Fluorescent Chemosensors For The Detection Of Copper And Cyanide Ions, Alicia Luhrs

Master's Theses

A series of silica nanoparticle-based fluorescent chemosensors were synthesized for the sensitive and selective detection of Cu²⁺ ions in aqueous solution and subsequent CN^- ion detection. Silica nanoparticles (SNP) were modified with branching polyamidoamine (PAMAM) dendrimers, which function as selective turn-off Cu²⁺ ion chelators and platforms for the attachment of rhodamine isothiocyanate (RITC) or fluorescein isothiocyanate (FITC) fluorescent dyes. In the presence of Cu²⁺ ions, the emission of the fluorescent dye is quenched by Forster resonance energy transfer (FRET) and is dependent upon dendrimer generation, pH, fluorescent dye, and surface charge. The quenching effectiveness was analyzed …

Evaluating Stolper-Samuelson: Trade Liberalization & Wage Inequality In India, Anthony M. Michael

Master's Theses

This paper tests the predictions of the Stolper-Samuelson Theorem in India after it underwent major trade reform in 1991. Using industry level tariff data, the paper empirically examines trade liberalization’s effect on the wages of high-skilled labor relative to low skilled labor within firms. The study finds empirical evidence to support growing wage differentials within firms, which contradict the predictions of the Stolper-Samuelson Theorem. Additionally, when controlling for firm size and the effects of the global financial crisis, these results remain robust. Finally, the paper explores training and welfare and R&D’s effect on the wage differentials within firms, finding a …

Savings Groups And Banks: Complements Or Substitutes? Financial Inclusion In Rural Tanzania, Shirleen Rubangura Teta

Master's Theses

Abstract: The substantial increase in the number savings and credit groups as well as microfinance institutions over the past years suggests that individuals in the developing world have progressively become aware of the importance of access to financial services. This study adds to the existing literature on the function of savings and credit groups in places with lower use of formal financial services and inform us whether these groups are a possible substitute or complement for formal financial services (banks) within low-income communities. Based on household data collected in Tanzania in 2013, this paper attempts, using two different estimations, a …

Financial Openness And Trade Volatility In Argentina, Joseph H. Asciuto

Master's Theses

This paper will identify the relationship between financial openness and trade volatility in Argentina. Data spanning 1970-2011 provided by the IMF, WTO, and INDEC will be used to construct a panel dataset for both a global analysis and a sectoral analysis for the Argentine economy. The application of established and accepted techniques to the constructed dataset will show a negative correlation between trade volatility and financial openness; thus, financial openness acts as a stabilizing mechanism for trade. Additional analysis will be performed on the of role regional trade agreements as stabilization mechanisms for trade. A significant implication of this study …

Effect Of Non-Monetary Incentives On Women's Competitive Inclination: Experimental Evidence From Ancona, Italy, Kalkidan Shebi

Master's Theses

This study investigates how monetary incentives versus non-monetary incentives affect women’s decision to enter a competitive environment. This study was conducted in Ancona Italy, in a controlled laboratory experiment with a total of 60 participants; of which 29 were male and 31 were female. Participants were given mathematical addition problems to solve under alternative incentives. How they received these incentives differed based on their preference to enter or withdraw from the competition. The study also included components that assessed risk preferences and willingness to pay for the non-monetary incentive in the experiment. Results show no significant difference in performance scores …

Climate Variability Influences Women’S Attitudes Towards Intimate Partner Violence (Ipv), Jean Lee

Master's Theses

The World Health Organization (WHO) estimates 1 in 3 women worldwide has experienced violence against women. Our study examines the effects of climate conditions on women’s attitudes towards wife beating. The demographic health surveys (DHS) dataset includes over 550,000 women in 38 countries, asked a series of wife beating justification questions in the domestic violence module. Using a linear probability model, we find prior year growing degree days (GDD), prior and current year rainfall variability have statistically significant effects. Most interestingly, we find that a one standard deviation (SD) rise in prior year annual rainfall decreases the likelihood of justifying …

The Effect Of Financial Sector Development On Fdi Led Growth In China, John Costigan

Master's Theses

Abstract: Over the past several decades developing countries have attracted and relied on Foreign Direct Investment (FDI) to supply their economies with the investment needed to maintain high economic growth and development. In their pursuit of FDI, many developing countries have passed policies and regulations aimed at attracting inward FDI. Because of the high growth rates and high returns on investment in many of these economies they have experience a large increase in FDI inflow over the past few decades. As these economies have grown and investment has increased, the financial services sector in the developing world has grown to …

The Investment Casualties Of War: Global Impacts Of Armed Conflict On Foreign Direct Investment Inflows, Reinhard J. Cate Mr.

Master's Theses

Abstract: Involvement in the outbreak of an armed conflict can present a variety of potential risks to an involved nation’s economy. In this paper I examine if one one of those risks, specifically that a new war could scare away foreign investment actually occurs and whether the intensity of the conflict increases or lessens the potential impact. Using ordinary least squares on panel data from 1966 to 2015, I examine the short and long term impacts of armed conflict on global foreign direct investment (FDI) inflows using two measures of conflict intensity: Large conflicts or ‘wars’, with 1000 or more …

Does Infant Formula Availability Reduce Breastfeeding?, Ingvild Madsen Lampe

Master's Theses

Abstract: Several key studies highlight the importance of breastfeeding and there is a broad consensus that it plays a crucial role for a child's health and cognitive development. This is especially true for the poor in developing countries, where vulnerable infants' access to proper nutrition is vital. We investigate the effect of introducing infant formula into a market on changes in breastfeeding patterns. Using the Demographic Health Surveys and annual reports from the baby food industry between 1981 and 2002 in 11 tropical countries, we find evidence that import of infant formula significantly reduces breastfeeding duration. The effects are stronger …