Digital Commons Network^™

Differential Power Analysis In-Practice For Hardware Implementations Of The Keccak Sponge Function, Nathaniel Graff

Master's Theses

The Keccak Sponge Function is the winner of the National Institute of Standards and Technology (NIST) competition to develop the Secure Hash Algorithm-3 Standard (SHA-3). Prior work has developed reference implementations of the algorithm and described the structures necessary to harden the algorithm against power analysis attacks which can weaken the cryptographic properties of the hash algorithm. This work demonstrates the architectural changes to the reference implementation necessary to achieve the theoretical side channel-resistant structures, compare their efficiency and performance characteristics after synthesis and place-and-route when implementing them on Field Programmable Gate Arrays (FPGAs), publish the resulting implementations under the …

Vehicle Pseudonym Association Attack Model, Pierson Yieh

Master's Theses

With recent advances in technology, Vehicular Ad-hoc Networks (VANETs) have grown in application. One of these areas of application is Vehicle Safety Communication (VSC) technology. VSC technology allows for vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) communications that enhance vehicle safety and driving experience. However, these newly developing technologies bring with them a concern for the vehicular privacy of drivers. Vehicles already employ the use of pseudonyms, unique identifiers used with signal messages for a limited period of time, to prevent long term tracking. But can attackers still attack vehicular privacy even when vehicles employ a pseudonym change strategy? The major contribution …

Strategic Selection Of Training Data For Domain-Specific Speech Recognition, Daniel Girerd

Master's Theses

Speech recognition is now a key topic in computer science with the proliferation of voice-activated assistants, and voice-enabled devices. Many companies over a speech recognition service for developers to use to enable smart devices and services. These speech-to-text systems, however, have significant room for improvement, especially in domain specific speech. IBM's Watson speech-to-text service attempts to support domain specific uses by allowing users to upload their own training data for making custom models that augment Watson's general model. This requires deciding a strategy for picking the training model. This thesis experiments with different training choices for custom language models that …

Zinc Sunscreens Affect Development Of Strongylocentrotus Purpuratus Embryos, Brittany E. Cunningham, Nikki L. Adams

Master's Theses

The growing popularity of physical sunscreens will also lead to an increased release of the ingredients from zinc oxide (ZnO) sunscreens into marine environments. Though zinc (Zn) is a necessary micronutrient in the ocean, greater than natural Zn concentrations are being released into marine environments by use of sunscreens. The extent of the consequences of the addition of Zn to the ocean are not fully understood. We investigated effects of materials released by zinc oxide (ZnO) sunscreens on the development of California purple sea urchin, Strongylocentrotus purpuratus. Embryos developed in various concentrations of Zn, the sources of which included …

N-Slope: A One-Class Classification Ensemble For Nuclear Forensics, Justin Kehl

Master's Theses

One-class classification is a specialized form of classification from the field of machine learning. Traditional classification attempts to assign unknowns to known classes, but cannot handle novel unknowns that do not belong to any of the known classes. One-class classification seeks to identify these outliers, while still correctly assigning unknowns to classes appropriately. One-class classification is applied here to the field of nuclear forensics, which is the study and analysis of nuclear material for the purpose of nuclear incident investigations. Nuclear forensics data poses an interesting challenge because false positive identification can prove costly and data is often small, high-dimensional, …

Tessellated Voxelization For Global Illumination Using Voxel Cone Tracing, Sam Thomas Freed

Master's Theses

Modeling believable lighting is a crucial component of computer graphics applications, including games and modeling programs. Physically accurate lighting is complex and is not currently feasible to compute in real-time situations. Therefore, much research is focused on investigating efficient ways to approximate light behavior within these real-time constraints.

In this thesis, we implement a general purpose algorithm for real-time applications to approximate indirect lighting. Based on voxel cone tracing, we use a filtered representation of a scene to efficiently sample ambient light at each point in the scene. We present an approach to scene voxelization using hardware tessellation and compare …

Finite-Difference Modeling Of The Batch Process Smoldering Combustion Of Wastewater, Laura H. Kawashiri

Master's Theses

A MATLAB model was developed for the smoldering combustion of wastewater in the context of a decentralized residential wastewater treatment appliance. Data from a batch process sewage smoldering experiment was simulated using implicit finite-difference approximations, assuming one-dimensional transient conductive heat transfer. The time-dependent temperature profiles within the column represented the main parameters of interest and were used to verify recoverable heat energy estimations. Given that the modeling method used for this thesis represents a unique approach, the assumptions and limitations of this model are thoroughly described in the context of reproducing results for other smoldering setups. A lack of convergence …

The Gods Have Taken Thought For Them: Syncretic Animal Symbolism In Medieval European Magic, Solange Nicole Kiehlbauch

Master's Theses

This thesis investigates syncretic animal symbolism within medieval European occult systems. The major question that this work seeks to answer is: what does the ubiquity and importance of magical animals and animal magic reveal about overarching medieval perceptions of the world? In response, I utilize the emerging subfield of Animal History as a theoretical framework to draw attention to an understudied yet highly relevant aspect of occult theory and practice. This work argues that medieval Europeans lived in a fundamentally “enchanted” world compared to our modern age, where the permeable boundaries between physical and spiritual planes imbued nature and its …

Utilizing Permanent On-Board Water Storage For Efficient Deep Space Radiation Shielding, Nathan Ryan Gehrke

Master's Theses

As space technologies continue to develop rapidly, there is a common desire to launch astronauts beyond the ISS to return to the Moon and put human footsteps on Mars. One of the largest hurdles that still needs to be addressed is the protection of astronauts from the radiation environment seen in deep space. The most effective way to defend against radiation is increasing the thickness of the shield, however this is limited by strict mass requirements. In order to increase the thickness of the shield, it is beneficial to make mission critical items double as shielding material.

The human rated …

Improving Introductory Computer Science Education With Draco, Mike Dongyub Ryu

Master's Theses

Today, many introductory computer science courses rely heavily on a specific programming language to convey fundamental programming concepts. For beginning students, the cognitive capacity required to operate with the syntactic forms of this language may overwhelm their ability to formulate a solution to a program.

We recognize that the introductory computer science courses can be more effective if they convey fundamental concepts without requiring the students to focus on the syntax of a programming language. To achieve this, we propose a new teaching method based on the Design Recipe and Code Outlining (DRaCO) processes. Our new pedagogy capitalizes on the …

Pink And Dude Chefs: Effectiveness Of An After-School Nutrition Knowledge And Culinary Skills Program For Middle School Students To Increase Fruit And Vegetable Consumption, Alyssa S. Vaziri

Master's Theses

The rate of overweight and obesity among adolescents aged 12-19 years has more than tripled since 1980, and disproportionately impacts low-income and marginalized populations. Reduction in adolescent obesity rates may result in decreased health risks, decrease healthcare costs, and increased quality of life. Effective intervention methods for adolescent participants have incorporated nutrition knowledge and culinary skill building into afterschool programs. This study examines whether building knowledge, skills, and confidence through a culinary intervention can improve adolescent participants’ choices of healthful foods through increased fruit and vegetable intake.

Pink and Dude Chefs (PDC) is an afterschool nutrition education and culinary skills …

Nutrient Removal In Microalgae Raceway Ponds And Nitrification Modeling, Esmeralda Diego

Master's Theses

This thesis explores the treatment of municipal wastewater using pilot-scale raceway ponds and looks specifically at the capability of the raceways in removing BOD and nitrogen. Nine 33 square-meter algal raceway ponds were used to conduct research at the San Luis Obispo Water Resources Recovery Facility. Main objectives of this study were to increase the removal of total ammonia nitrogen (NH₃-N plus NH₄⁺-N) from municipal wastewater through increased assimilation and nitrification. Raceway ponds with CO₂ addition were operated in series with an intermediate settling step and a total hydraulic retention time (HRT) of 4 …

Barriers To Dental Care For Children With Autism Spectrum Disorders, Nidhi Taneja

Master's Theses

Aims: To investigate barriers to dental care for children with autism spectrum disorder (ASD) from dentists’ and caregivers’ perspective.

Methods: This paper documents two cross sectional surveys of barriers to treating children with ASD. 109 general dentists were surveyed at a national conference in study 1, of whom about 74% reported treating children with ASD. In study 2, 83 caregivers were surveyed in hospital clinics, 46 of whom had a child with ASD, and 37 had children without ASD, and acted as a control group. Results: The most commonly endorsed barriers perceived by general dentists were: lack of guidelines …

Security Dilemma In U.S.-China Relations: A Non-Traditional Security Studies Perspective, Jessica Tran

Master's Theses

Since Former President Barack Obama’s announcement of the Pacific Pivot in 2011, the security dilemma in U.S.-China relations have worsened considerably. Under President Donald Trump’s administration, the shifting of U.S. military focus to the Asia-Pacific region is expected to continue. As the U.S. moves forward with increasing its military presence in the Pacific to counter a perceived “aggressive” China, it may lead to serious consequences. This thesis presents the argument that China’s conception of national security includes the defense of the state from both foreign and domestic threats. Therefore, China’s military developments and policies are not strictly in response to …

Testimonies Of Identity And Intimate Partner Violence, Jamie Berrien

Master's Theses

Intimate Partner Violence (IPV) is an epidemic that has impacted millions of women in our country. IPV is found in every community and impacts women from all races, ethnicities, religion, background, and socio-economic status. Yet, research shows that women in the United States who are not a part of the dominant culture experience IPV at a much higher rate than white women. This study focuses on the sacred testimonies of six women who have experienced IPV, as well as an analysis of the women's identities and other forms of oppression which impacts her experiences and survival of the violence.

Impact Of Cooperative Membership On Members' Household Economies: The Case Of Chiapas Coffee Farmers, Stephen Pitts

Master's Theses

Coffee producers typically sell raw coffee beans as the first step in a global value chain. Recently, groups of producers have formed coffee cooperatives that attempt to regain market power by integrating the other steps of the value chain. This study uses matching to estimate the effect of membership in one such cooperative on the household economy of indigenous coffee producers in the state of Chiapas, Mexico. It contributes to the literature by considering new determinants of participation and outcomes of interest. First, social capital at the individual and village level is correlated with cooperative membership more than other demographic …

Sweden's Great Escape: Industrialization And The Changing Productivity Cost Of Winter, Charlotte Taylor, Jesse Anttila-Hughes

Master's Theses

We combine a paleoclimate reconstruction of the North Atlantic Oscillation (NAO)- a key determinant of Scandinavian winter intensity- with four centuries of historical production data from Sweden, to examine the changing influence of climate variability on production over time. We find the colder, drier winters associated with the negative phase of the NAO led to reduced economic production for much of Swedish history, and that this relationship changed with development: during industrialization, Sweden underwent a transition from ‘level’ effects, where harsh winters lowered average incomes, to ‘growth’ effects, where it reduced growth in improving living standards. Post-industrialization, neither ‘level’ nor …

Bi Or Multilingualism And Its Curriculum For Children With Sli, Jeongmin Ryou

Master's Theses

The purpose of this project, which is based on SLI children age 3-6, is to inspect the possibility of bi- or multilingualism on SLI children and to create a curriculum, which consists of six modules, accordingly. It includes a variety of visual and auditory materials for each module, offers well-tailored daily lesson, and helps children with SLI learn the target language simply and easily. This project provides tips for teachers and can be also referenced when a teacher creates his or her own curriculum. Each module is flexible and should be tailored to the individual, while also being facilitated to …

Opportunities Beyond High School: An Eld Unit For Newcomer Students, Karen Toepp

Master's Theses

As an English Language Development (ELD) teacher, I noticed the junior newcomer students at my high school in the Bay Area of California were not being prepared for jobs or careers after their graduation. As newcomers, they are working through trauma, reuniting with their families, learning a new language and adapting to a new culture. Though many arrived with high expectations for school, students stopped connecting graduating high school with having access to higher education, which meant more job training and better employment opportunities. A lack of motivation and unskilled teachers contributed to students struggling in school and leading to …

Boosting Demand For Biofortified Foods: The Case Of Orange Fleshed Sweet Potato Bread In Tamale, Ghana, Tchassanty Ouro-Gbeleou

Master's Theses

Abstract: In the context of introducing biofortification of staple crops as a food-based approach to combat micronutrient malnutrition in Sub Saharan Africa (SSA), we carried out a survey in Tamale, Ghana to elicit consumers’ preference of and willingness to pay for one of the highly nutritious biofortified staple crop processed product: the Orange Fleshed Sweet Potato (OFSP) bread. Our results indicate that scores of respondents in the sample show preference for OFSP bread. The most important determinants of OFSP bread preference are its sweet taste and soft texture and consumers are willing to pay 0.634 pesewas more for the attribute …

Dreams Sin Fronteras: Exploring The Lives And Experiences Of Five Returned Migrants In Mexico, Andrea Portillo

Master's Theses

Due to an unprecedented number of deportations in the last decade, coupled with a recent fall in net migration from Mexico, return migration from the United States to Mexico has made its way to the forefront of the immigration discourse. This article uses the experiences of five Mexican migrants who have returned to Mexico, “voluntarily” or through deportation proceedings, to argue that the stories and experiences of returned migrants can provide insight into the challenges/successes of life post-return. In doing so, this article draws parallels between the personal experiences of these five returnees and the broader discourse on return migration, …

An Economic Valuation Of Biodiversity: Measuring Willingness-To-Pay For Quinoa Conservation In Peru, Craig Scott

Master's Theses

Peru is facing increasing homogenization of traditional crops as a result of international market pressures. Destruction of the genetic resource base creates vulnerability to disease, climate, and pest shocks which threaten food security and the economic future of Peru’s agricultural sector. This paper aims to determine whether informational priming on the non-market value of national identity is sufficient to change the willingness to pay for agro biodiversity programs among the Peruvian general population in both urban and rural areas. A choice set willingness to pay experiment combined with choice rankings and randomized priming measures how much individuals are willing to …

Public Policy And Millennium Development Challenges: Case Study Of Africa, Pathkonn Kombate

Master's Theses

Abstract:

Based on a panel of 50 African countries from 1970 to 2015, this study analyzes the impact of public investments and spending in education and health sectors on GDP per capita growth. I separately modeled for education and health capital, while controlling for governance and demonstrated the importance of investments and expenditures on human capital in countries production capacity accumulation, which in the long run leads sustainable economic growth. Results show a positive relationship between spending in those sectors and the per capita income growth and proves their importance on the continents’ combat against poverty.

Incentives And Teacher Effort: Evidence From Lagos, Nigeria, Simileoluwa Adebajo

Master's Theses

According to recent research (Hattie, 2003), teachers contribute to around 30% of the overall variation in student achievement and success – more than any other influencing factor. This study seeks to understand how different types of incentives (monetary, near monetary and non-monetary incentives) influence the “effort” of public school teachers as perceived by the students in Lagos, Nigeria using a novel measurement tool – the teaching effectiveness survey – to measure the teachers’ outcomes. Using a randomized field experiment where students evaluate the changes in their teachers’ effort with a standard teaching effectiveness survey and differences in differences estimation, we …

Immigrant Identities: U.S. Intervention And The American Dream In Central America, Madeline Linn

Master's Theses

This thesis explores the ways in which U.S. intervention in Central America has been a contributing force to out-migration. Moving away from the conventional lens of migration studies, this thesis attempts to bridge a connection between the imposed construct of the American dream and the early implementation of U.S. neoliberal policy to measure a shift in immigrant identity. The historical antecedents of U.S./Central American relations are explored in order to trace the earliest moments of intervention in the physical sense. Discourse analysis is utilized to track the ways in which a ‘good life’ narrative and benchmarks of ‘success’ have been …

Cultural Imperialism, Tv And Children Spectatorship In Contemporary Ghana., Aba Micah

Master's Theses

A content and discourse analysis of television programs is performed to show that Ghanaians do enjoy their local programs but very little time is allocated for children’s content on both the public and private stations. Instead, foreign content has flooded the TV channels for both adult and children’s programs and this is concerning because culture is being lost amongst the new generation. Also, in an era where representation matters, African children should be represented in the media. This paper centers on cultural and media imperialism and representation of the African child in the media and we find that TV programs …

Multilingual Families Homeschooling: Reasons, Goals, And Challenges, Georgina J.J. Aubin

Master's Theses

This study examines homeschooling among multilingual families by providing insight into multilingual parents’ motivations, goals, and challenges in homeschooling, along with their perception of the role their diverse language background plays in their homeschooling experience. Through the LangCrit framework, this study explores the intersection of language and parental involvement in the identities multilingual parents live as they homeschool their children. Findings demonstrate that parents’ goals and challenges center on academic and social concerns, rather than language issues. Rather, the influence of their language background emerges in descriptions directly focused on language and culture. The fluid dimensions of their identities are …

The Impact Of Goal Settings And Self-Help Groups To Support Small Businesses: Experimental Evidence Using Female Entrepreneurs In Abuja Nigeria., Nneoma Nwobilor

Master's Theses

Approximately 57% of women in Nigeria from age 15-64 are involved in some form of employment, but there are still 17 million unemployed women (World Bank, 2016). Most of these women are involved in informal entrepreneurship due to external constraints. According to the World Bank, women who have no access to schooling are forced to find informal work to provide for themselves and their families. This study aims to analyze the effectiveness of goal settings and support groups on small businesses among female small-scale business owners in Abuja Nigeria. The research conducted uses the experimental design created by the Family …

The Causal Impact Of Cleft Lip And Palate Surgery On Psychological Wellbeing, Sam Manning

Master's Theses

Cleft lip and/or cleft palate (CL/P) are birth conditions in which a newborn has an opening in the roof of their mouth or a slit in their upper lip. Left untreated, CL/P can lead to speech impediments and an unsightly orofacial deformity. However, a sequence of simple, common surgical procedures can restore function with minimal scarring. To date, the psychological effects of being born with CL/P have been investigated in the literature, but the restorative impact of CL/P surgery on psychological wellbeing has not been rigorously evaluated. This study uses a quasi-experimental approach to estimate the impact of being born …

Patriarchal Norms, Bargaining, And Gendered Attitudes On Intimate Partner Violence, Anna Eckenrode

Master's Theses

How do the underlying mechanisms of social norms and bargaining power relate to the acceptance of intimate partner violence within households? How do short run and long run determinants of gender norms affect attitudes toward IPV? This study begins to decompose the dynamics of the acceptance of IPV within couples using data from the Demographic Health Survey, as well as examine the relationship in the context of patriarchal societies using data from the Ethnographic Atlas. I find that females are more accepting than males of intimate partner violence, and females becoming more educated is associated with her being less accepting …