Digital Commons Network^™

Structured Dynamic Factor Analysis Of Environmental Time Series With Application To Morro Bay Estuary, Jose Garcia

Master's Theses

This thesis develops a structured dynamic factor analysis (sDFA) framework for decomposing multivariate environmental time series into latent biological and physical components. The methodology is applied to five years of high-resolution passive monitoring data collected from two sites in Morro Bay, California from 2020 through 2024. Relative contribution indices are developed based on the structured DFA that measure how much each latent process contributes to each observed variable at any given time. Structured DFA models fit to the application data suggest site-specific patterns in how biological and physical processes affect water quality variables. At the bay mouth location, physical processes …

A2s Uplink Latency Minimization For Wildfire Monitoring Systems Using Mbse And Stochastic Modeling, Luis Giovanni Wang

Master's Theses

Wildfire response depends on how quickly a detection reaches the people who act on it, and the slowest remaining step is often the link that carries an alert from a remote sensing platform to a satellite. This thesis models the latency of that link, the Air-to-Space uplink, for a wildfire-monitoring UAV that carries a Starlink terminal and sends an ALERT packet to a serving Low Earth Orbit satellite. The uplink is difficult to predict because both the UAV and the satellite move, and because the wildfire environment degrades the channel at the moment the data matters most.

The thesis uses …

A Proof-Of-Concept Design Of A High-Gain Deployable Reflectarray Antenna For A 3u Cubesat, Armin Behbahani

Master's Theses

CubeSats are a class of nanosatellites that have democratized space exploration by greatly reducing cost and complexity. Their small size and limited power generation directly limit the performance of a high-data-rate communication system due to low transmit power and limited gain from small antenna sizes. Transmission losses increase with higher operating frequencies, spurring the need for innovative high-gain antenna solutions. This thesis investigates the design of a deployable 10 GHz reflectorarray, a planar high-gain aperture antenna, for a 3U CubeSat. A simple variable-size square-patch resonant unit cell was designed for implementation on commonly available PCB layer stack-ups. Preliminary reflectarray system …

Examining The Ligands, Location, And Function Of Toll-Like Receptor 10, Kiefer Keanu Tam

Master's Theses

Toll-like receptors are a class of innate immune pattern recognition receptors that detect pathogen-associated molecular patterns and regulate downstream inflammatory responses. Toll-like receptor 10 remains the only human TLR whose ligand specificity, cellular localization, and immunological function are not fully defined. Emerging evidence suggests that TLR10 may play an anti-inflammatory role and can heterodimerize with TLR2 to modulate immune signaling. Previous studies from our laboratory demonstrated that stimulation with heat-killed Mycobacterium tuberculosis promotes TLR2-TLR10 heterodimerization and trafficking to the cell surface. In this study, we expanded our ligand panel to include additional gram-positive bacteria, particularly anti-inflammatory probiotic species, to further …

Urban Green Space As Climate Infrastructure, Wyatt W. Del Valle

Master's Theses

This thesis estimates the causal effect of urban parks on land surface temperature in the

American Southeast using a geographic regression discontinuity at park boundaries. The

result is null. Within a CCT-optimal 257-meter bandwidth across five cities, park interiors

are not detectably cooler than the land immediately outside them:−0.023 °C, p = 0.926.

A two-way fixed effects panel across 20 cities and 39 years confirms the well-documented

NDVI–LST relationship—a 0.1-unit increase in NDVI is associated with 3.4 °C lower surface

temperature—while a park size heterogeneity model runs directly into the siting endogeneity

problem, showing why naive distance gradients cannot be …

Adaptive Reuse As Sustainability: Reconciling The Crises Of Functionalism And Environmental Conservation In Copenhagen And San Francisco, Samuel J. Fernandez

Master's Theses

Sustainability is the buzzword for modern global development. In the age of rapidly growing populations, unsustainable building practices, and an ever-present climate crisis, there must be a reorientation in global urban development practices. While experts tend to tout one sustainable initiative as a catch-all solution to the above crises, a multidimensional problem cannot be solved with a one-dimensional approach. In other words, sustainable development can only be achieved through a combination of different practices and approaches. This case study seeks to present adaptive reuse as a viable reaction to the climate crisis, but one that requires a combination of other …

Cyberspatial Cartographies: Mapping Digital Nationhood Within The California-Punjabi Diaspora., Saihajpratap Singh Bajwa

Master's Theses

This research investigates the phenomenon of digital nationhood, the idea that a new form of community is actively produced through interactions taking place within digital social networks and forums. These spaces function as more than repositories of information or cultural archives; they are living ecosystems in which identity is constructed through mutual encounters among members of a diaspora, where shared references, meanings, and concepts proliferate across multiplex networks. The central questions animating this inquiry are: can a nation exist without a territory, and are these encounters producing what we might conceive of as a digital nation?

The Punjabi people serve …

Linking Fishery Productivity To Child Health In The Coastal Tropics, Francisco Flores-Mejia

Master's Theses

Fish are a primary source of calories, macronutrients, and income for coastal communities around the world, but overfishing and environmental changes have dramatically reduced productivity in the majority of small-scale fisheries. The social costs of these losses are believed to be large, particularly in poorer communities, but most estimates of fishery productivity effects on households are contextual and difficult to generalize. We combine a remote sensing measure of pelagic fishery productivity with geolocated child health and growth data from 34 countries in the coastal tropics. We estimate that the difference between sustainedly good versus bad fishing conditions corresponds up to …

Middle Management Diplomacy: An Examination Of Us Foreign Policy Analysis In Middle-Echelon Diplomatic Professionals, Isaac R. Silvino

Master's Theses

This study analyzes the role which managerial level U.S. military Foreign Area Officers and Foreign Service Officers play in shaping and implementing U.S. foreign policy. By analyzing the individual professional at the middle-echelons of an organizational hierarchy, we make an effort in dispelling ourselves from obscured perceptions of IR centered on character and state idealization driven narratives. Doing this may help bridge the foundational gap between academics and practitioners while shifting towards a paradigm of IR analysis focusing on human agency and decisions.

Result

Individual managerial echelon diplomats do not directly make policy, but rather play a crucial role in …

The Feather Of The Quill: How Folklore Shapes Human Relationships With Wildlife, Taylor Breeanne Nelson

Master's Theses

This thesis examines how folklore and cultural phenomena shape human relationships with wildlife, arguing that the stories a society tells about animals are not merely reflective of its values but are constitutive of them. Drawing on narrative research methods sourced from literature and academic journals and interviews with academics, conservationists, and community members, this project examines the role of animal folklore.

I discuss how narratives around wildlife evolved alongside the development of the United States, arguing that the beginnings of mainstream American conservation not only displaced existing communities but also erased the sophisticated human-animal relationships their traditions had long sustained. …

Herd Conditions And Food Security: Evidence From Kenya, Kira J. Enriquez

Master's Theses

Food insecurity is worsening across Kenya's Arid and Semi-Arid Lands, where over three million people currently face acute hunger. Among pastoral communities in these regions, livestock are the central productive asset and primary food source. When herds deteriorate, households face falling milk production and the erosion of assets that would otherwise buffer consumption during difficult periods. This paper tests whether livestock body condition and rangeland forage quality predict household food coping behavior, and whether those relationships differ above and below a Micawber-style herd size threshold. Using a panel of 232 pastoralist households surveyed across five ASAL counties between 2021 and …

Crop Yield Shocks And Conflict In Sub-Saharan Africa: Subnational Evidence From Satellite-Based Yield Predictions, Benson I. Adomako

Master's Theses

This paper examines whether crop yields affect violent conflict at the subnational level across seven Sub-Saharan African countries: Burkina Faso, Ethiopia, Mali, Malawi, Niger, Nigeria, and Tanzania, over the period 2010 to 2024. A central identification challenge is that observed yields are endogenous to conflict: armed violence disrupts planting, cultivation, and harvest. To address this, I train a machine learning model on observed maize yield and satellite and environmental features to generate predicted yields for 1,338 second-level administrative districts annually. These predictions serve as the key regressor in a two-way fixed-effects panel with district and year fixed effects. I find …

Marriage Trafficking Of Minority Ethnic Women And Girls In North And South Vietnam: Traditional Dowries And Bride Price As A Subterfuge For Human Trafficking, Nikita Tran

Master's Theses

This is a qualitative capstone project that examines marriage trafficking affecting minority ethnic communities in North and South Vietnam. Through a qualitative descriptive research, the significant findings include: (a) girls and women from ethnic minority groups are the most vulnerable to marriage trafficking, (b) marriage trafficking was most prevalent in the mountainous, rural regions of north Vietnam, (c) dowries are used and significantly impact the marriage proposals, (d) most girls and women are marriage trafficked to China, (e) the challenges of staying and leaving a marriage trafficking situation are complex, including leaving their children and facing social stigma, (f) the …

Spatial Analysis Of Maize Yields And Household Dietary Diversity In Sub-Saharan Africa: Causal Evidence From A Machine Learning Instrument, Addi Joof

Master's Theses

MAIZE YIELDS AND HOUSEHOLD DIETARY DIVERSITY IN SUB-SAHARAN AFRICA: EVIDENCE ON THE CAUSAL EFFECT FROM A MACHINE LEARNING INSTRUMENT

Addi Joof, University of San Francisco, May 2026

This paper provides estimates of the effect of maize yield on household dietary diversity across seven Sub-Saharan African countries, using data from 36,474 maize-growing households in the Living Standards Measurement Study Integrated Surveys on Agriculture (LSMS-ISA) panels for the period 2008--2021. OLS estimates which include district and country-by-wave fixed effects yield a positive and significant coefficient of 0.070 (SE = 0.006, p < 0.001), implying that a 10 percent increase in maize yield raises the Household Dietary Diversity Score (HDDS) by approximately 0.007 food groups. Because self-reported yields are subject to classical measurement error and unobserved household characteristics confound the OLS estimate, we construct an instrumental variable using a Random Forest model trained on satellite-derived agro-environmental features including the Enhanced Vegetation Index, Normalized Difference Vegetation Index, Growing Degree Days, precipitation, and soil moisture obtained from Google Earth Engine at the GPS-coordinate-by-year level. Our preferred 2SLS specification, which adds region fixed effects to absorb persistent sub-national geographic variation, returns a positive point estimate of 0.217 (SE = 0.206; 95% CI: -0.19 to +0.63, p = 0.294) larger than OLS and consistent with downward attenuation bias, but imprecisely estimated and statistically indistinguishable from zero at conventional levels. We interpret the OLS estimate of 0.070 as a credible lower bound on the true effect, with the IV evidence pointing to a moderately larger but uncertain magnitude. Heterogeneity analysis reveals a declining gradient across consumption quintiles the effect is strongest among the poorest households (Q1: 0.055, p < 0.01) and diminishes with wealth (Q5: 0.015, not significant) while showing no gradient across market-integration levels. These patterns are consistent with own-consumption, rather than market income from surplus sales, as the primary pathway from yield to dietary diversity. OLS estimates are positive and significant in five of six estimable countries. The findings suggest that maize yield improvements can serve as a nutrition co-investment, particularly for subsistence-oriented smallholders, though the available data do not permit a sharp causal quantification of the effect size.

Keywords: dietary diversity, maize yields, instrumental variables, Sub-Saharan Africa, LSMS-ISA, satellite …

Investigating Cryptic Diversity In The Hawaiian Endemic Plant, Psychotria Mariniana (Rubiaceae), Uyen Thi Hoang Nguyen

Master's Theses

Islands, with their isolation and steep environmental gradients, serve as natural laboratories for studying speciation. Molecular phylogenetic and population genetic methods utilizing Next-Generation Sequencing (NGS) have revolutionized our ability to document patterns of genetic divergence and diversity. Cryptic diversity, genetically distinct populations that were previously unrecognized as unique, and cryptic speciation, where divergent genetic populations may be deserving of status as unique species, have been observed in many taxa. The Hawaiian Islands provide an ideal setting for studying divergence and speciation due to their extreme isolation, known ages, and volcanic origin. Previous work has investigated the evolutionary relationships of the …

A Stadium In Our Backyard: Community Participation In Stadia Redevelopment Projects, Sofia Zazueta

Master's Theses

The Santiago Bernabeu in Madrid, Spain and the Chase Center in San Francisco, California are two stadium redevelopment projects that exemplify the stakeholder dynamics that come into play when developers pitch a multipurpose stadium located a few blocks away from people’s backyards. Urban development patterns must be in constant evolution to meet the needs and demands of the current generations. In cities, stadia redevelopment projects have entered the picture to reimagine the role that these structures once played. The stadium once used for the sole purpose of holding matches has become a venue that now hosts different events such as …

La Maquiladora De Sueños Is Where The “American Dream” Ends: The Socio-Cultural Impact Of Hai(T)Ijuanenses In The United States-México Borderlands, Pedro Aleman Perfecto

Master's Theses

Historically, Tijuana has been the destination for migrants who have been left out from the United States, Mexico, and the rest of the world. The city is at the epicenter of globalization where many transit, leave, and arrive. Sometimes considered a “third country” due to its binational and bicultural identity with its sister city, San Diego, California. The growing number of Haitian refugees that arrived in Tijuana in the mid 2010s to seek asylum in the United States overwhelmed the city’s infrastructure and left the Haitian community vulnerable, yet it created new opportunities and reshaped new identities in the region. …

What Complexity Costs: Growth, Productive Capability, And The Vulnerability Of Interconnectedness, Pete Mcniff

Master's Theses

Growth depends on the sophistication of what an economy can produce, but economies that have specialized more deeply depend on the market access that sustains it. I test whether this dependence makes complex economies more vulnerable when access is disrupted, computing the Economic Complexity Index (ECI) from firm-level records in the U.S. Census of Manufactures (1850--1880) and using the Panic of 1873 as a natural experiment to measure county-level market access shocks from railroad bond defaults following Dutta (2024) and Donaldson and Hornbeck (2016). ECI predicts production and employment growth across all three decade windows, with the association strengthening as …

Trust, Civic Institutions, And Crisis: A Study Of Civic Culture In Italy, Nolan Joseph Sherwood

Master's Theses

This paper examines whether cultural familism — the orientation of trust toward family at the expense of strangers and civic institutions — shapes civic institutional engagement in Italy across three levels of analysis. The first analysis links four familism indices constructed from the European Values Study (2017) to pre-COVID municipal 5 per mille tax allocation rates across approximately 7,700 Italian municipalities, finding that higher Trust Gap and Institutional Distrust robustly predict lower baseline civic giving, both nationally and within each region. The second analysis uses a Regression Discontinuity in Time design exploiting the sharp onset of COVID-19 in 2020, finding …

Hidden Behind Happiness: Bhutan’S Global Image And Ethnic Exclusion, Deepesh Das Shrestha

Master's Theses

Bhutan has gained international recognition for its philosophy of Gross National Happiness (GNH), which promotes holistic development through principles of well-being, environmental sustainability, cultural preservation, and good governance. Yet this celebrated image conceals a darker history: the systematic expulsion of the Lhotsampa, the Nepali-speaking ethnic minority of southern Bhutan. This study critically explores the contradiction between Bhutan's international image as a model of happiness and the lived experiences of Lhotsampa refugees who were displaced during the early 1990s.

Using a qualitative phenomenological research design, the study draws upon in-depth semi-structured interviews with six resettled Bhutanese Lhotsampa refugees living in the …

Structure And Diversity Of Play Behavior In Juvenile Belding's Ground Squirrels, Paul O'Driscoll Ii

Master's Theses

Play behavior is ubiquitous among juvenile mammals and can promote motor, social, and cognitive development, providing multiple adaptive benefits to young animals in some cases. The structure of play can be linked to the benefits it confers on individuals. I evaluated the structure of play in juvenile Belding’s ground squirrels (Urocitellus beldingi), a species for which multiple adaptive benefits of play have been identified. I compared juvenile play in U. beldingi to adult sexual and aggressive behavior to determine and classify similarities between juvenile play and adult behavior. I evaluated diversity in the behaviors expressed during play interactions and diversity …

Flowing Borders: U.S. Border Externalization In Latin America And The Los Angeles Declaration On Migration And Protection, Magdalena Olvera Hernandez

Master's Theses

In recent years, Latin America has emerged as a central transit region for extracontinental migrants originating from Africa, Asia, and the Middle East who seek to reach North America through alternative routes. This thesis examines the Los Angeles Declaration on Migration and Protection, among other regional migration governance frameworks that have reshaped migratory flows, state responsibilities, and protection outcomes in the Western Hemisphere. Focusing on the Darién Gap as a strategic chokepoint, the study analyzes the effects of coordinated migration policies, border externalization, and differentiated state roles on extracontinental mobility.

Drawing on official migration statistics from Panama, the United States, …

Asian American Multiraciality And Cultural Wealth In Higher Education, Marielle Song Lyons

Master's Theses

Multiracial Asian American college students endure pervasive and commonplace monoracism, multiracial microaggressions, and deficit-based narratives in higher education, which negatively impact their sense of self, belonging, and mental health. Through narrative methodology, the present qualitative study captures the stories of three multiracial Asian American undergraduate students and how they are making sense of their racialized experiences and cultural wealth in higher education. The results of this study suggest that (a) multiracial Asian Americans experience monoracism and multiracial microaggressions, which shape their understanding of cultural legitimacy and impact their behavior, sense of self, and relationships with others; (b) monoracism and multiracial …

Paternal Investment And Labor Market Soft Skills: Evidence From The Philippines, Timothy Crane Wilkins

Master's Theses

Fathers’ involvement in their children’s lives may shape the social skills that determine labor market success, yet evidence from Southeast Asia remains limited. This study examines the relationship between paternal investment and soft skills used in the workforce. Using original survey and experimental data from more than 300 parents of young children in Metro Manila, Philippines, I analyze how their fathers’ past involvement during childhood, and current involvement as grandparents in childcare relate to dictator-game giving, interpersonal trust, and workplace relations. The results indicate that paternal investment is most statistically significant with improved workplace relations, specifically with participants’ reported ability …

Meeting Their Needs: Experiences Of Uc Berkeley International Graduate Students Navigating Financial Strain, Ryann M. Hirt

Master's Theses

Of prior research on student experiences with financial strain, little has specifically focused on international student experiences in higher education while studying in the U.S., in tandem with financial strain. This qualitative study, through utilization of narrative methodology, explores the ways in which international students–in particular, graduate students–experience and navigate financial strain during their studies at a large, R1: Doctoral university: the University of California, Berkeley. The research was guided by three questions: (a) What are UC Berkeley international students’ stories of navigating financial strain? (b) What are the experiences of UC Berkeley international students with external and internal (campus) …

Ecological And Nutritional Drivers Of Floral Fidelity In Wild Pollinators, Adelaide Elise Ergastolo

Master's Theses

Plants must receive pollen from the same species in order to successfully reproduce. For most flowering plants, the transfer of pollen occurs via animal pollinators while they forage on plants to obtain food. Therefore, the fidelity of pollinators to individual plant species during foraging trips is directly related to the amount of conspecific pollen plants receive. Low floral fidelity of pollinators can reduce plant reproductive success, which in turn has the potential to lower food resources for pollinators in the future. While many factors can potentially influence pollinator floral fidelity, several important ones may be the nutritional resources provided by …

Vietnamese American Anti-Imperialism: South Vietnamese History And Analysis Of Publications Pre-1975, Jeannie Nguyen

Master's Theses

During the Vietnam War, citizens contested US imperialism at multiple levels. In South Vietnam, citizens published newspapers and magazines to challenge their government and expose the depth of US aggression in South Vietnamese society and culture. Inside the imperial core, Black, Chicano, and Asian American activists formed solidarities to resist the war and challenge racial inequality. At the intersection of imperialism inside and outside its borders, lies a group of South Vietnamese students and scholars who became American, migrating during the war via state-structured projects. However, in response to the heightening of war and drawing inspiration from their ‘Third World’ …

Effects Of A Basketball Match On Heart Rate Variability In Collegiate Intramural Players, Unobatsha Mbaiwa

Master's Theses

Heart rate variability (HRV) is a standard non-invasive physiological marker used to asses the autonomic nervous system (ANS) function and cardiovascular adaptability. HRV reflects the natural variations in time between successive heartbeats (R-R intervals), which come as a result of the interaction between sympathetic and parasympathetic branches of the ANS (Shaffer & Ginsberg, 2017). Higher HRV compared to an individual's baseline is normally considered an indicator of greater parasympathetic (rest/digest) influence and more effective physiological recovery, whereas lower HRV relative to baseline is associated with sympathetic (fight/flight) dominance, fatigue, and increased physiological strain. Since the standardized HRV measurement criteria were …

The Undaunted: How Young Adult Activist Literature Depicts The Fight For Social Justice, Emma Stack

Master's Theses

In this thesis, I will explore a wide range of young adult fiction novels that feature themes surrounding activism. My goal will be to use a number of novels to illustrate the importance of analyzing literature that features young people as activists within social justice movements. My main overarching question is: How are young people represented as activists in young adult literature, and how can young people use such literature as a catalyst for social change? I also plan to explore questions relating to how young people are represented as activists, why their voices are so integral when promoting social …

Sull'essere Umani "On Being Human", Benjamin S. Woodard

Master's Theses

The thesis describes the essential parts of the compositional process and how music expresses the individual philosophies of the composer. The goal is not to describe an overarching, and therefore overbearing, ruleset for what makes the compositional process human, but to describe it in relation to personal experience, with the rise of large language models in mind—sprouting from this research, composing a piece of music that reflects both the new electronic music that has now been embedded academically and the centuries-old tradition of performing on analog instruments. “Sull’essere Umani,” the English translation being "On Being Human", was the piece that …