Digital Commons Network^™

Initial Orbit Determination Error Analysis Of Low-Earth Orbit Rocket Body Debris And Feasibility Study For Debris Cataloguing From One Optical Facility, Kyle Stoker

Master's Theses

This paper is predicated on determining the effectiveness of angles-only initial orbit determination (IOD) methods when limited observational data is available for low-Earth orbit (LEO) rocket body debris. The analysis will be conducted with data obtained from Lockheed Martin Space’s Space Object Tracking (SpOT) facility, focusing on their observational data from 2018 that contains tracking of rocket body debris for less than one minute per overhead pass. After the IOD accuracies are better understood, a feasibility study will follow that investigates the possibility of cataloguing LEO orbital debris from a single optical observation facility with similar observational capabilities as that …

A Study Of The Design Of Adaptive Camber Winglets, Justin J. Rosescu

Master's Theses

A numerical study was conducted to determine the effect of changing the camber of a winglet on the efficiency of a wing in two distinct flight conditions. Camber was altered via a simple plain flap deflection in the winglet, which produced a constant camber change over the winglet span. Hinge points were located at 20%, 50% and 80% of the chord and the trailing edge was deflected between -5° and +5°. Analysis was performed using a combination of three-dimensional vortex lattice method and two-dimensional panel method to obtain aerodynamic forces for the entire wing, based on different winglet camber configurations. …

Pocket Rocket: A 1u+ Propulsion System Design To Enhance Cubesat Capabilities, James M. Harper

Master's Theses

The research presented provides an overview of a 1U+ form factor propulsion system design developed for the Cal Poly CubeSat Laboratory (CPCL). This design utilizes a Radiofrequency Electrothermal Thruster (RFET) called Pocket Rocket that can generate 9.30 m/s of delta-V with argon, and 20.2 ± 3 m/s of delta-V with xenon. Due to the demand for advanced mission capabilities in the CubeSat form factor, a need for micro-propulsion systems that can generate between 1 – 1500 m/s of delta-V are necessary.

By 2019, Pocket Rocket had been developed to a Technology Readiness Level (TRL) of 5 and ground tested in …

Flexible Fault Tolerance For The Robot Operating System, Sukhman S. Marok

Master's Theses

The introduction of autonomous vehicles has the potential to reduce the number of accidents and save countless lives. These benefits can only be realized if autonomous vehicles can prove to be safer than human drivers. There is a large amount of active research around developing robust algorithms for all parts of the autonomous vehicle stack including sensing, localization, mapping, perception, prediction, planning, and control. Additionally, some of these research projects have involved the use of the Robot Operating System (ROS). However, another key aspect of realizing an autonomous vehicle is a fault-tolerant design that can ensure the safe operation of …

Modeling Artificial Groundwater Recharge In The Santa Rosa Creek Watershed, Alexander J. Murray

Master's Theses

The Santa Rosa Creek Watershed is an approximately 48 mi2 large watershed located on the central coast of California. This watershed drains to the Pacific Ocean through Santa Rosa Creek as it passes through agricultural land and the town of Cambria. Historically the groundwater within the Santa Rosa Creek Watershed has been used for irrigation, municipal and domestic uses, and the creek is critical habitat steelhead trout. During dry years, there is less water for all uses. When low groundwater levels occur, water can be drawn out of the creek and into the soil, drying out steelhead habitat. Seven agricultural …

A Study Of The Utilization Of Panel Method For Low Aspect Ratio Wing Analysis, William Barton D. Newey

Master's Theses

This study demonstrates the applicability of using a modified application strategy of panel method to analyze low aspect ratio wings at preliminary design phases. Conventional panel methods fail to capture the leading edge vortex (LEV) that is shed by wings with low aspect ratios, typically below 2 depending on planform. This aerodynamic phenomenon contributes to a significant amount of the lift of these wings and the result is a drastic underestimation of the lift characteristics when analyzed by conventional panel method. To capture the effect of the leading edge vortex, a panel method code was used with an extended definition …

A Comparative Study On Seismic Analysis Methods And The Response Of Systems With Classical And Nonclassical Damping, Noah G. Bleichner

Master's Theses

This thesis investigated the application of seismic analysis methods and the response of idealized shear frames subjected to seismic loading. To complete this research, a Design Basis Earthquake (DBE) for a project site in San Luis Obispo, CA, and five past earthquake records were considered. The DBE was produced per the American Society of Civil Engineers’ Minimum Design Loads for Buildings and Other Structures (ASCE 7-10) and used for application of the Equivalent Lateral Force Procedure (ELFP) and Response Spectrum Analysis (RSA). When applying RSA, the modal peak responses were combined using the Absolute Sum (ABS), Square-Root-of-the-Sum-of-Squares (SRSS), and Complete …

Student Government Leaders And Their Roles In Cooperative Transformative Change On Campus: An Examination Of Undergraduate Changemakers At A California University, Robert Jittrikawiphol

Master's Theses

The purpose of this paper is to examine attitudes, beliefs, and feelings of student government leaders at a large West Coast research University where they enjoy a high level of autonomy in decision making and how the ability to be a partner in institutional transformation translates to personal and professional leadership development. Interviews were conducted with a number of individuals who served as campus-wide elected officials who represented the undergraduate student body. The interview participants talked about their experiences with faculty, staff, and administrators while involved in student government.

Results showed that when given access to information and considered on …

Supporting Our Troops In Higher Education: Veteran Admissions Training Program, Steven Delgado

Master's Theses

An overview of a Veteran Admissions Training Manual for a California State University campus.

Determination Of A Graph's Chromatic Number For Part Consolidation In Axiomatic Design, Jeffery Anthony Cavallaro

Master's Theses

Mechanical engineering design practices are increasingly moving towards a framework called axiomatic design (AD). A key tenet of AD is to decrease the information content of a design in order to increase the chance of manufacturing success. An important way to decrease information content is to fulfill multiple functional requirements (FRs) by a single part: a process known as part consolidation. One possible method for determining the minimum number of required parts is to represent a design by a graph, where the vertices are the FRs and the edges represent the need to separate their endpoint FRs into separate parts. …

Lithology, Structure, Geochronology, And Tectonic Implications Of The Spider Glacier Unit And Holden Assemblage, North Cascades, Washington, Colin Phillips

Master's Theses

To better understand the effects of deeply emplaced sediments on continental magmatic arcs, researchers study crustal cross sections where meta-sediments are exposed at the surface, such as the crystalline core of the North Cascades of Washington. The 8–12 kbar Swakane Biotite Gneiss has been considered the deepest meta-sedimentary unit in the section, but my mapping shows that the adjacent Spider Glacier unit is probably structurally lower. The Spider Glacier unit consists of biotite and hornblende gneisses, quartzites and rare meta-peridotites, all deformed by highly variably oriented folds with a mean moderate west plunge. My U-Pb dating of detrital zircon indicates …

What Remains: The Practice And Presence Of Felix Gonzalez-Torres, Jessica Olivia Yee

Master's Theses

Contradiction has been widely used to describe the work of the artist Felix Gonzalez-Torres (1957-1996); however, it does not fully encapsulate the complexity of the artist’s oeuvre. This thesis turns to the German director Bertolt Brecht’s notion of dialectical theater, which highlights the tensions, struggles, and interplay between contrary tendencies as a way to understand Gonzalez-Torres’s work. When the contradiction that marks the artist’s work is thought of in terms of dialectical theater, it can be better understood as layered and intentional. This thesis examines the necessary dialectical relationship presented in his work through the artist’s employment of theatrical devices …

Conflict Of A Nation, And Repatriation In Collapsed States: The Case Of South Sudan, Emmanuel Bakheit

Master's Theses

The purpose of this paper is to intervene in the discourse about South Sudan’s civil war to express and provide insights into the broader reality of South Sudan’s civil war. This is to highlight challenges for democracy, possible interface in the peace process, and repatriation of refugees and resettlement of internally displaced persons (IDPs). The aim of this paper is, therefore, to transcend the current literature that lacks critical analysis in capturing the true nature of the civil war. South Sudan’s civil war has been portrayed as a conflict of two tribes, Dinka and Nuer. This is the imprecise politics …

A Migration System In The Making: Institutional And Experiential Dynamics Of Refugees And Asylum-Seekers In Mexico, Melissa Balliet

Master's Theses

This thesis argues that Mexico’s refugee regime - its institutions, its legal instruments and its norms - are under serious pressure and, as a result of that pressure, a new refugee regime is emerging in the country. This new refugee regime is based on the notion that the movement of refugees, asylum-seekers and irregular migrants should be effectively managed and strictly controlled. Such pressure, resulting in an aggressive border enforcement strategy implemented by the Mexican state, has come directly from the United States government. New policies and contractual agreements emerging from the United States and Mexico (2018-2019) have made it …

Tinderbox: Danish-Russian Relations, 1989-2019, Maddy Ghose

Master's Theses

This thesis documents and analyzes the major trends of the military, political, economic, and cultural relationships between Denmark and Russia from 1989 to 2019. I document the relationship from the Danish perspective, using primary sources, with the aim to conduct analysis of Danish politicians’ speeches and activities during this period. The outcome is a comprehensive image of the Danish-Russian bilateral relationship at the present time. This relationship has fluctuated widely during the time period under study. Shared economic development interests in the 1990s contributed to a positive relationship; controversy surrounding the war in Chechnya and an assertive Danish prime minister …

Undocumented Asian Immigrants: Securing Higher Education And Cultural Citizenship, Ka Kui Lee

Master's Theses

This research investigates how undocumented Asian immigrants navigate the obstacles of higher education. It inquires how undocumented Asian immigrant students navigated the higher education process and how institutional actors influenced their college experience, revealing the intimate interactions between undocumented students and the institutional actors. The political economy of their college application process is understood through the frameworks of liminal legality, narratives, cultural citizenship, borders and boundaries, and governmentality of migration, all of which frame the process of the data analysis.

Through the interviews of college-graduated undocumented Asian immigrants and ethnography at a local high school in the San Francisco Bay …

Narratives Of Black Identifying Newcomer Youth, Saniyyah Lateef

Master's Theses

This study seeks to explore and understand the unique and individual experiences of Black identifying newcomer youth in the United States. Current research related to the experience of newcomers is limited in regards to Black identifying newcomers. Through narrative inquiry methodology, this study seeks to share the experiences of Black identifying newcomer youth. It does this while recognizing the omnipresence of racism in the United States, and acknowledging the influence of life prior experience on identity development. The intent of this study is to help educators and community members better understand the integration and assimilation processes of Black identifying newcomers. …

Revision Of Student Learning Expectations In The Context Of Relationships, Mary Mckeever

Master's Theses

Abstract

Saint Philip’s Catholic School is situated in the Noe Valley in San Francisco, an expensive residential area of the city. It is currently in the process of preparing for a midcycle visit from WASC/WCEA, the accreditation body for Catholic schools. During its most recent accreditation process, revision of the Schoolwide Learning Expectations (SLEs) was identified as a goal. The Report of Findings noted this as “Annual review and revision of the SLEs by all community shareholders.” (ISL 2012, p. 16). Feedback from faculty also indicated that there was a need for the SLEs to be revised, so that they …

Hinduism As A Political Weapon: Gender Socialization And Disempowerment Of Women In India, Aindrila Haldar

Master's Theses

There is a growing use of religion as a political tool to control Hindu women in India, contributing to a rise in gender inequality. Immediate authoritative patriarchal domains such as household and politics, continuously speak of “protecting” Hindu women by disregarding their voices and needs. Consequently, potentially creating a loss of agency among women. This research will use inductive reasoning to understand the position of Hindu women in modern Indian society. Particularly, through the understanding of the involvement of religion in the political and household sphere. Hindu women are highly influenced by the expectations of what being an ”ideal” woman …

The Socio-Environmental Politics Surrounding The Commodification Of Guayusa In The Ecuadorian Amazon, Molly Silk

Master's Theses

Guayusa, a tree used for its leaves, that when dried, boiled, and consumed in tea form, acts as a natural stimulant due to its high levels of caffeine. Initially used among Kichwa people, the plant is thought to be a panacea with abilities to heal health complications such as infertility, headaches, and nausea. In addition, the Kichwa community holds an incredibly strong ritualistic and cultural connection to the tea. Guayusa is said to connect the person and community to the dream world through the process of gathering in the early hours of the morning to drink the tea, and decipher …

All Hail The Market: Immigration And Economics In A Post-Cold War Western Hemisphere, Jorge Ambriz

Master's Theses

The end of the Cold War lifted the United States to the role of the sole economic superpower, and an opportune moment to address hemispheric issues was presented to Washington policymakers. By the end of the 1980s, hemispheric forced migration was on the rise, with a large portion of those forced to flee from Central America. This moment coincided with the decade characterized by an increasingly connected world, where globalization in the form of economic linkages were being proposed in the Summit of the Americas, hemispheric meetings that began in the 1990s in hopes of addressing hemispheric issues. While the …

Income Inequality In America: Conclusions From 100 Years Of Income Tax Data And Cross-Country Comparisons, Noriel Campos

Master's Theses

In 1913, taxation of income was permanently introduced in the United States. Other similarly developed countries soon followed suit. From there, income inequality in the United States dropped significantly, and the decline in Europe was even more dramatic. First, this paper considers the changes over time of the share of national income gained by the top 1% of income earners in seven countries going back to World War Two. A second analysis considers the impact that tax policy may have had on the share of income accruing to the top 1% of U.S. income earners between 1980 and 2014, a …

Assessing Methods For Determining Reference Conditions For Riparian Restoration In Santa Clara County, Claire Mallen

Master's Theses

Valley Water is the primary water wholesaler and flood control agency in Santa Clara County, providing services to 1.9 million residents. The operation and maintenance of infrastructure for water supply and flood control often require work within legally protected natural resources such as riparian ecosystems. Riparian ecosystems are dynamic and diverse ecosystems that provide our society with valuable services such as wildlife habitat, water quality, and recreation. However, the threat of human development on native ecosystems has led to the degradation and loss of 85-98% of riparian ecosystems nationwide. Today, federal, state, and regional laws mitigate further impacts to riparian …

Dangerous Dice: Playing With Artificial Intelligence And Populism During Brazil's 2018 Election, Glen Salazar

Master's Theses

With the advent of artificial intelligence and the resurgence of populism, in particular right-wing populism, we see nationalist parties that were once on the fringes of mainstream politics gain power around the world. Putting under the limelight the recent electoral victories of world leaders riding this new wave of populism, we recognize a troubling new reality: the confluence of artificial intelligence and populism allows for election interference through the spread of disinformation, propaganda, and emotionally charged populist rhetoric on social media. This tectonic shift in election tactics used by extreme nationalists presents an existential threat to democracy, with the potential …

From Influx To Integration: How Germany’S Grassroots Organizations Are Supporting Refugees, Kyra Jablonsky

Master's Theses

With the global trend of massive population displacement only expected to rise in the years to come, it will be more important than ever to understand how to successfully integrate large populations. Using Germany as a case study in the aftermath of the refugee crisis, this paper looks at the unique and important ways in which German grassroots organizations supporting refugees are contributing to successful integration, within that country’s larger aid ecosystem. Participants in this project, which was conducted in Berlin, Germany, included ten refugees, six grassroots organizations, one German volunteer, one social enterprise, one international non-governmental organization (NGO), a …

Oil Price Changes And Unemployment Rate In The U.S. And Chile, Agamani Maity

Master's Theses

Abstract

There is a recurring question in theoretical, empirical and policy work is what the effects of higher oil prices are on the country’s macroeconomic aggregates. Empirical evidence in support of the view that fluctuation in the economy due to the interaction of macroeconomic variables is caused by oil price was based on inappropriate econometric models. These studies do not capture the composition of the price of oil that is affected by the exogenous oil shocks and has an indirect or direct impact on the macroeconomic aggregates. In this study, we decompose the change in oil prices into three structural …

The Socio-Demographic Factors Influencing Ntca Immigrants’ Accessibility To Mexico’S Health Care System, Ken Nishikata

Master's Theses

Mexico’s geographical location has made the country play a centric role in trans-national migration from the Northern Triangle of Central America (NTCA) comprising Guatemala, El Salvador and Honduras. As a result, immigration has increasingly become a political issue for Mexico over the past decades^[1]. Before the eruption of the Central American crisis in the 1980s, Mexico’s southern border with Guatemala was recognized for its openness. However, such a tolerating status-quo changed as the number of NTCA immigrants entering Mexico increased upon the exacerbation of the crisis that placed thousands of individuals in exile. Indeed, the turmoil during the …

The Socio-Demographic Factors Influencing Ntca Immigrants' Accessibility To Mexico's Health Care System, Ken Nishikata

Master's Theses

Mexico’s geographical location has made the country play a centric role in trans-national migration from the Northern Triangle of Central America (NTCA) comprising Guatemala, El Salvador and Honduras. As a result, immigration has increasingly become a political issue for Mexico over the past decades^[1]. Before the eruption of the Central American crisis in the 1980s, Mexico’s southern border with Guatemala was recognized for its openness. However, such a tolerating status-quo changed as the number of NTCA immigrants entering Mexico increased upon the exacerbation of the crisis that placed thousands of individuals in exile. Indeed, the turmoil during the …

The Harms Of Willful Ignorance: Maternal Healthcare Providers’ Insight On Racial Disparities, Cara Marisa Cancelmo

Master's Theses

Black women in the United States die in pregnancy and childbirth at alarmingly high rates. According to The Center for Disease Control, black women are two to three times more likely to die from pregnancy-related causes than white women. The black-white racial disparity is even greater in New York City, and The NYC Department of Health has found that black mothers in NYC still face higher rates of harm even when accounting for risk factors like educational attainment, obesity, and neighborhood poverty level. Drawing on 18 interviews with NYC-based Obstetricians, Labor and Delivery Nurses, and Midwives, this study examines how …

Genome-Wide Rnai Screen Of Kinase Pathways Regulating Rrt-1 Constitutive Cytoprotective Gene Expression, Jacob Bowie

Master's Theses

Environmental stress disrupts cellular homeostasis leading to proteostasis disruptions which must be correct by rapid reprogramming of transcription and translation mediated by the translation machinery of which tRNA and aminoacyl tRNA synthetases are particularly important. Our aim in this study was to conduct a genome-wide RNAi kinase screen of a long-lived and stress-resistant rrt-1(gc47) (MC240) C. elegans mutant that constitutively, under naïve conditions, expresses a GFP reporter for gpdh-1, which is required for survival during hypertonic stress, but not expressed under naïve, non-stress conditions. Our approach was to administer RNAi by feeding, and we used 382 RNAi clones, including genome-wide …