Digital Commons Network^™

Using Gaze Tracking To Tackle Duplicate Questions On Community Based Question Answering Websites: A Case Study Of Ifixit, Pankti Gandhi

Master's Theses

The number of unanswered questions on Community based Question Answering (CQA) websites has increased significantly due to the rising number of duplicate questions. This is a serious problem, one that could lead to the decline of such beneficial websites.

This thesis presents novel avenues that use gaze tracking technology and behavioral testing to tackle this problem. Based on prior studies on web search behaviors, we assumed that adding contextual information (snippets) to proposed related questions displayed on the `Ask a Question' page of the CQA website iFixit would improve the asker experience and reduce their tendency to post a new …

Exploring The Concept Of A Deep Space Solar-Powered Small Spacecraft, Kian Guillaume Crowley

Master's Theses

New Horizons, Voyager 1 & 2, and Pioneer 10 & 11 are the only spacecraft to ever venture past Pluto and provide information about space at those large distances. These spacecraft were very expensive and primarily designed to study planets during gravitational assist maneuvers. They were not designed to explore space past Pluto and their study of this environment is at best a secondary mission. These spacecraft rely on radioisotope thermoelectric generators (RTGs) to provide power, an expensive yet necessary approach to generating sufficient power. With Cubesats graduating to interplanetary capabilities, such as the Mars-bound MarCO spacecraft, matching the modest …

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 …

Dynamics Simulation And Optimal Control Of A Multiple-Input And Multiple-Output Balancing Cube, Felix K. Haimerl

Master's Theses

This thesis document outlines the development of a multibody dynamics simulation of an actively stabilized multiple-input, multiple-output, coupled, balancing cube and the process of verifying the results by implementing the control algorithm in hardware. A non-linear simulation of the system was created in Simscape and used to develop a Linear Quadratic Gaussian control algorithm. To implement this algorithm in actual hardware, the system was first designed, manufactured, and assembled. The structure of the cube and the reaction wheels were milled from aluminum. DC brushless motors were installed into the mechanical system. In terms of electronics, a processor, orientation sensor, motor …

Influencing Exploration In Actor-Critic Reinforcement Learning Algorithms, Andrew R. Gough

Master's Theses

Reinforcement Learning (RL) is a subset of machine learning primarily concerned with goal-directed learning and optimal decision making. RL agents learn based on a reward signal discovered from trial and error in complex, uncertain environments with the goal of maximizing positive reward signals. RL approaches need to scale up as they are applied to more complex environments with extremely large state spaces. Inefficient exploration methods cannot sufficiently explore complex environments in a reasonable amount of time, and optimal policies will be unrealized resulting in RL agents failing to solve an environment.

This thesis proposes a novel variant of the Actor-Advantage …

Catheter Localization Utilizing A Sensor-Enabled Guidewire: Design Of A Proof-Of-Concept System, Adam Edward Evard

Master's Theses

The purpose of this thesis project was to develop a proof-of-concept system for tracking the tip of a catheter without an embedded electromagnetic sensor by utilizing a sensor enabled guidewire. The motivation for the project was a reduction fluoroscopy radiation dose for clinicians in the interventional cardiology lab and the extension of navigation technology to be used with a wider variety of interventional devices through the implementation of expanded capabilities of the Abbott MediGuide system. The focus of the project was on the development of a proof-of-concept system capable of using an external device to track relative guidewire and catheter …

Software Requirements Classification Using Word Embeddings And Convolutional Neural Networks, Vivian Lin Fong

Master's Theses

Software requirements classification, the practice of categorizing requirements by their type or purpose, can improve organization and transparency in the requirements engineering process and thus promote requirement fulfillment and software project completion. Requirements classification automation is a prominent area of research as automation can alleviate the tediousness of manual labeling and loosen its necessity for domain-expertise.

This thesis explores the application of deep learning techniques on software requirements classification, specifically the use of word embeddings for document representation when training a convolutional neural network (CNN). As past research endeavors mainly utilize information retrieval and traditional machine learning techniques, we entertain …

Design, Simulation, And Hardware Construction Of A 600 W Solid State Dc Circuit Breaker For The Dc House Project, Calin Matthew Bukur

Master's Theses

DC circuit breakers must be able to arrest overcurrent conditions to prevent electrical equipment and wiring from causing building fires or other hazards from occurring. With more DC renewable sourced structures such as Cal Poly’s DC House, an inexpensive and reliable protection system is necessary to ensure safe energy transfer to the loads. One method of protecting a system is preventing excessive amounts of current to be drawn by the load when the surrounding components are rated at a lesser value. DC circuit breakers act as a monitoring system and barely presents an effect on the voltage or power. With …

Analyzing Global Cyber Attack Correlates Through An Open Database, Brady Benjamin Aiello

Master's Theses

As humanity becomes more reliant on digital storage and communication for every aspect of life, cyber attacks pose a growing threat. However, cyber attacks are generally understood as individual incidents reported in technological circles, sometimes tied to a particular vulnerability. They are not generally understood through the macroscopic lens of statistical analysis spanning years over several countries and sectors, leaving researchers largely ignorant of the larger trends and correlates between attacks. This is large part due to the lack of a coherent and open database of prominent attacks. Most data about cyber attacks has been captured using a repository of …

Logging And Analysis Of Internet Of Things (Iot) Device Network Traffic And Power Consumption, Ryan Joseph Frawley

Master's Theses

An increasing number of devices, from coffee makers to electric kettles, are becoming connected to the Internet. These are all a part of the Internet of Things, or IoT. Each device generates unique network traffic and power consumption patterns. Until now, there has not been a comprehensive set of data that captures these traffic and power patterns. This thesis documents how we collected 10 to 15 weeks of network traffic and power consumption data from 15 different IoT devices and provides an analysis of a subset of 6 devices. Devices including an Amazon Echo Dot, Google Home Mini, and Google …

Investigating Forward Flight Multirotor Wind Tunnel Testing In A 3-By 4-Foot Wind Tunnel, Reed Danis

Master's Theses

Investigation of complex multirotor aerodynamic phenomena via wind tunnel experimentation is becoming extremely important with the rapid progress in advanced distributed propulsion VTOL concepts. Much of this experimentation is being performed in large, highly advanced tunnels. However, the proliferation of this class of vehicles extends to small aircraft used by small businesses, universities, and hobbyists without ready access to this level of test facility. Therefore, there is a need to investigate whether multirotor vehicles can be adequately tested in smaller wind tunnel facilities. A test rig for a 2.82-pound quadcopter was developed to perform powered testing in the Cal Poly …

Use Of Manifolds In The Insertion Of Ballistic Cycler Trajectories, Oliver K. Morrison

Master's Theses

Today, Mars is one of the most interesting and important destinations for humankind and copious methods have been proposed to accomplish these future missions. One of the more fascinating methods is the Earth-Mars cycler trajectory which is a trajectory that accomplishes repeat access to Earth and Mars with little to no fuel-burning maneuvers. This would allow fast travel to and from Mars, as well as grant the possibility of multiple missions using the same main vehicle.

Insertion from Earth-orbit onto the cycler trajectory has not been thoroughly ex- plored and the only existing method so far is a Hohmann-esque transfer …

The Design, Building, And Testing Of A Constant On Discreet Jammer For The Ieee 802.15.4/Zigbee Wireless Communication Protocol, Alexandre J. Marette

Master's Theses

As wireless protocols become easier to implement, more products come with wireless connectivity. This latest push for wireless connectivity has left a gap in the development of the security and the reliability of some protocols. These wireless protocols can be used in the growing field of IoT where wireless sensors are used to share information throughout a network. IoT is being implemented in homes, agriculture, manufactory, and in the medical field. Disrupting a wireless device from proper communication could potentially result in production loss, security issues, and bodily harm. The 802.15.4/ZigBee protocol is used in low power, low data rate, …

Detection Method Of Subclinical Atherosclerosis Of The Carotid Artery With A Hemodynamics Modeling Approach, Marisa Peressini

Master's Theses

Subclinical atherosclerosis is an important area of research to evaluate stroke risk and predict localization of plaque. The current methods for detecting atherosclerosis risk are insufficient because it is based on The Framingham Risk Score and carotid intima media thickness, therefore an engineering detection model based on quantifiable data is needed. Laminar and turbulent flow, dictated by Reynolds number and relative roughness, was modeled through the carotid artery bifurcation to compare shear stress and shear rate. Computer-aided design and fluid flow software were used to model hemodynamics through the carotid artery. Data from the model was derived from governing equations …

Developing, Evaluating, And Demonstrating An Open Source Gateway And Mobile Application For The Smartfarm Decision Support System, Caleb D. Fink

Master's Theses

The purpose of this research is to design, develop, evaluate, and demonstrate an open source gateway and mobile application for the SmartFarm open source decision support system to improve agricultural stewardship, environmental conservation, and provide farmers with a system that they own. There are very limited options for an open source gateway for collecting data on the farm. The options available are: expensive, require professional maintenance, are not portable between systems, improvements are made only by the manufacturer, limited in customization options, difficult to operate, and data is owned by the company rather than the farmer. The gateway is designed …

Coaching Styles And The Basic Psychological Need Fulfillment Of College Athletes, Kelsey Louise Byrd

Master's Theses

The purpose of this study was to determine to what extent a coach’s coaching style is associated with the athlete’s basic psychological needs fulfillment of autonomy, competence and relatedness. A survey was distributed to 204 varsity student-athletes at Cal Poly, San Luis Obispo representing 13 teams. The data were used to determine the impact of coaching style on the athlete’s fulfillment of autonomy, competence and relatedness. An authoritative head coaching style was found to have a positive impact on an athlete’s fulfillment of autonomy, competence and relatedness. A similar result was found for assistant coaches. Overall, these findings can help …

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 …

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.

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 …

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 …

Using Monetary Incentives To Support Female Entrepreneurship: An Experimental Test Of Monetary Incentives In Abuja, Nigeria, Imuetinyan Aiguwurhuo

Master's Theses

Gender gaps in entrepreneurship are a major problem everywhere, but especially in developing countries like Nigeria. Women across the world face high levels of discrimination and abuse. The process of empowering women in a society has the potential to boost economic growth and development. Inspired by the success of the Family Independence Initiative (FII), we designed a field experiment to estimate the impact of using monetary incentives to motivate female entrepreneurs in achieving their goals in collaboration with the National Center for Women Development (NCWD) in Abuja, Nigeria. Our results suggest that being in a peer support group, setting a …

On The Front Lines: Service Providers Respond To The Haitian Refugee Crisis, Karina Castro

Master's Theses

Haitian Refugees arrived in Tijuana in mass numbers in the fall of 2016, with the dream of receiving asylum in the United States. However, upon their arrival, U.S. immigration policy changed and Tijuana became their permanent home as it strived to absorb this new population. In this paper I will address how Tijuana service-providers responded to this humanitarian crisis and were affected by U.S. and Mexican policies in their ability to support the integration of Haitian refugees in their communities. The historical context of Haitian migration history will provide an overview of push factors via an analysis of the economic, …

How Language Policies And Practices Affect Classrooms In Schools And Colleges, Gwendolyn F. Stanley

Master's Theses

To understand the origin of this documentation pertaining to How Language Policies and Practices Affect Classrooms in Schools and Colleges goes all the way back in time to the 1800s. The year of 1890 was the time, when the so-called minority generation in the United States came to realize that, injustice was going to be at a standstill unless some action would take place. This country was set on uncertain written standards that were bound to have been noted as constitutional. The constitution says this, and the constitution states that, “While the 13^th Amendment to the United States Constitution …

From Davao City To Daly City: Examining Translanguaging And Transnationalism In The 1.5-Generation Filipin(A/O) Americans Of Daly City, Rita Ewing

Master's Theses

In the field of migration studies, research on transnationalism has been well

established. Applying an intersectional framework of post-colonial narrative and

linguistic anthropology to transnational migration, this research allows us to better

understand how the transnational immigrant deploys language. Through a nostalgia

studies approach, this study is able to analyze how transnational immigrants place value

on their heritage and second languages, and reflexively deploy their language sets to

reflect their unique positionality. This paper is a case study examination of five adult

members of the 1.5-generation of Filipin(a/o) American immigrants, who immigrated to

the US before the age of eighteen …

The Composition Of Public Expenditure: Does It Matter For Economic Growth?, Valery Awuh

Master's Theses

Abstract: In the past, a lot of studies put more emphasis on the aggregate government expenditure as the primary driver of social and economic growth which is in the short term. The studies did not capture expenditures on infrastructure, education, and defense which are the disaggregate government expenditure that sustains both social and economic growth in the long term.

The objective of this study is to determine how the demand and supply side of government expenditure can impact on social and economic growth using 45 both advanced and emerging countries. It also wants to establish the expenses that have a …

Overlooking Men And Boys In Forced Criminality At The Border: A Content Analysis Of Human Trafficking Training And Awareness Materials, Eric Beasley

Master's Theses

Executive Summary

In the Post 9/11 era, where American security is intimately linked to a militarized border management system designed to protect the United States and its territories from threats of terrorism, illegal drugs, and illegal immigration, the media continues to perpetuate the 'Latino Threat Narrative'. The images and information offered to us for consumption help us construct an understanding of events, people, and places. This paper explores how the 'Latino Threat Narrative' and inherent gender biases shape how the Department of Homeland Security (DHS) understands vulnerability and identifies human trafficking victims, particularly men and boys from Mexico and Central …