Digital Commons Network^™

Lazy Fault Detection For Redundant Mpi, Corey Ford

Master's Theses

As the scale of supercomputers grows, it is becoming increasingly important for software to efficiently withstand hardware and software faults. Process replication is one resilience technique, but typical implementations require replicas to stay closely synchronized with each other. We propose algorithms to lazily detect faults in replicated MPI applications, allowing for more flexibility in replica scheduling and potential power savings. Evaluation shows that, when all processes are operated at full power, this approach allows applications to complete substantially faster as compared to using a synchronized model, and often as fast as in non-replicated execution.

A Multi-Carrier Collaborative Solution To Minimize Connectivity-Loss, Michael Wong

Master's Theses

Nearly two-thirds of Americans own a smart phone, and 19% of Americans rely on their smartphone for either accessing valuable information or staying connected with their friends and family across the globe [15]. Staying always-on and always-connected to the Internet is one of the most important and useful features of a smartphone. This connection is used by almost every single application on the device including web browsers, email clients, messaging applications, etc. Unfortunately, the cellular networks on our smartphones are not perfect and do not always have cellular signal. Our devices often lose Internet connection when users are on the …

Autonomous Formation Flying And Proximity Operations Using Differential Drag On The Mars Atmosphere, Andres Eduardo Villa

Master's Theses

Due to mass and volume constraints on planetary missions, the development of control techniques that do not require fuel are of big interest. For those planets that have a dense enough atmosphere, aerodynamic drag can play an important role. The use of atmospheric differential drag for formation keeping was first proposed by Carolina L. Leonard in 1986, and has been proven to work in Earth atmosphere by many missions. Moreover, atmospheric drag has been used in the Mars atmosphere as aerobraking technique to decelerate landing vehicles, and to circularize the orbit of the spacecraft. Still, no literature was available related …

Genes Encoding Flower- And Root-Specific Functions Are More Resistant To Fractionation Than Globally Expressed Genes In Brassica Rapa, Naiyerah F. Kolkailah

Master's Theses

Like many angiosperms, Brassica rapa underwent several rounds of whole genome duplication during its evolutionary history. Brassica rapa is particularly valuable for studying genome evolution because it also experienced whole genome triplication shortly after it diverged from the common ancestor it shares with Arabidopsis thaliana about 17-20 million years ago. While many B. rapa genes appear resistant to paralog retention, close to 50% of B. rapa genes have retained multiple, paralogous loci for millions of years and appear to be multi-copy tolerant. Based on previous studies, gene function may contribute to the selective pressure driving certain genes back to singleton …

After The Paris Agreement: How India Can Use Climate Financing To Implement A Sustainable Clean Cookstove Program, Hannah Kornfeld

Master's Theses

The burning of biomass for cooking purposes without proper ventilation and filters poses a massive health and climate risk. Health implications from exposure to household air pollution from this type of fuel impacts women and children in many developing countries, who spend many hours a day cooking and gathering fuel. Climate implications from burning solid biomass results in increased carbon dioxide and black carbon emissions, which contribute to global climate change. This thesis aims to explore the issues associated with biomass cookstoves in terms of both health and climate, and seeks to understand how a new national clean cookstove program …

Sysml Based Cubesat Model Design And Integration With The Horizon Simulation Framework, Shaun Luther

Master's Theses

This thesis examines the feasibility of substituting the system input script of Cal Poly’s Horizon Simulation Framework (HSF) with a Model Based Systems Engineering (MBSE) model designed with the Systems Modeling Language (SysML). A concurrent student project, SysML Output Interface Creation for the Horizon Simulation Framework, focused on design of the HSF Translator Plugin which converts SysML models to an HSF specific XML format. A SysML model of the HSF test case, Aeolus, was designed. The original Aeolus HSF input script and the translated SysML input script retained the format and dependency structure required by HSF. Both input scripts …

Pacifying Paradise: Violence And Vigilantism In San Luis Obispo, Joseph Hall-Patton

Master's Theses

San Luis Obispo, California was a violent place in the 1850s with numerous murders and lynchings in staggering proportions. This thesis studies the rise of violence in SLO, its causation, and effects. The vigilance committee of 1858 represents the culmination of the violence that came from sweeping changes in the region, stemming from its earliest conquest by the Spanish. The mounting violence built upon itself as extensive changes took place. These changes include the conquest of California, from the Spanish mission period, Mexican and Alvarado revolutions, Mexican-American War, and the Gold Rush. The history of the county is explored until …

Exploring Data Driven Models Of Transit Travel Time And Delay, Bobjot Singh Sidhu

Master's Theses

Transit travel time and operating speed influence service attractiveness, operating cost, system efficiency and sustainability. The Tri-County Metropolitan Transportation District of Oregon (TriMet) provides public transportation service in the tri-county Portland metropolitan area. TriMet was one of the first transit agencies to implement a Bus Dispatch System (BDS) as a part of its overall service control and management system. TriMet has had the foresight to fully archive the BDS automatic vehicle location and automatic passenger count data for all bus trips at the stop level since 1997. More recently, the BDS system was upgraded to provide stop-level data plus 5-second …

Polyfs Visualizer, Paul Martin Fallon

Master's Theses

One of the most important operating system topics, file systems, control how we store and access data and form a key point in a computer scientists understanding of the underlying mechanisms of a computer. However, file systems, with their abstract concepts and lack of concrete learning aids, is a confusing subjects for students. Historically at Cal Poly, the CPE 453 Introduction to Operating Systems has been on of the most failed classes in the computing majors, leading to the need for better teaching and learning tools. Tools allowing students to gain concrete examples of abstract concepts could be used to …

An Iteration On The Horizon Simulation Framework To Include .Net And Python Scripting, Morgan Yost

Master's Theses

Modeling and Simulation is a crucial element of the aerospace engineering design pro- cess because it allows designers to thoroughly test their solution before investing in the resources to create it. The Horizon Simulation Framework (HSF) v3.0 is an aerospace modeling and simulation tool that allows the user to verify system level requirements in the early phases of the design process. A low fidelity model of the system that is created by the user is exhaustively tested within the built-in Day-in-the-Life simulator to provide useful information in the form of failed requirements, system bottle necks and leverage points, and potential …

An Ergonomics Analysis Of Redundancy Effect In Touch Screen Design For The Aged Population, Sarah Riesenberg

Master's Theses

Touch screen technology is rapidly increasing, and at the same time there is a shifting, aging population. As the percentage of the population over the age of 65 increases, adults of the age group are adopting smartphones and tablets more now than ever before. Although older adults are adopting touch screen devices, they face many challenges when interacting with said devices, such as not knowing how to navigate between pages, not knowing where to click for an action to occur, and the touch screen interface is often too sensitive or the buttons are not big enough. Furthermore, the challenges of …

Skewer: Sentiment Knowledge Extraction With Entity Recognition, Christopher James Wu

Master's Theses

The California state legislature introduces approximately 5,000 new bills each legislative session. While the legislative hearings are recorded on video, the recordings are not easily accessible to the public. The lack of official transcripts or summaries also increases the effort required to gain meaningful insight from those recordings. Therefore, the news media and the general population are largely oblivious to what transpires during legislative sessions.

Digital Democracy, a project started by the Cal Poly Institute for Advanced Technology and Public Policy, is an online platform created to bring transparency to the California legislature. It features a searchable database of state …

Rearing Temperature Affects The Expression Of Proteins In The Adhesive Of The Striped Acorn Barnacle, Balanus Amphitrite, Melissa J. Daugherty

Master's Theses

Barnacles are dominant hard–fouling organisms in marine waters. They attach to substrates by secreting a complex proteinaceous adhesive. Understanding the chemical composition of this multi–protein underwater adhesive and how it is affected by environmental variables, such as oceanic temperatures, is critical for developing nontoxic solutions to control biofouling. Previous experiments in our lab revealed an inverse relationship between critical removal stress (CRS) and temperatures at which barnacles were reared. Further investigations showed that this correlation is not attributed to differences in physical properties such as barnacle size or short–term changes in the viscosity of adhesive. Therefore, the observed effects may …

Hall Effect Modeling In Fem Simulators And Comparison To Experimental Results In Silicon And Printed Sensors, Leonardo A. Frem

Master's Theses

Finite element method simulation models for thin-film semiconductor-based Hall sensors were developed using secondary data in order to understand their behavior under strong magnetic fields. Given a device geometry and charge carrier density and mobility, the models accurately calculated sensor resistance, Hall voltage under a normally-incident constant magnetic field, and expected offset from a population of Hall devices. The model was successfully matched against data from integrated chip Hall sensors from St. Jude Medical. Additionally, the feasibility of creating Hall effect devices with common carbon ink was explored experimentally. The material properties obtained from testing these ink-based devices through the …

The Bottlefly Ios Application For Wine Recommendations, Carson James Carroll

Master's Theses

The use of smartphone applications has taken over the way people interact with the world. The design of an application has become an important aspect in keeping the user engaged [22]. People are looking for applications that are easy to use and will get the job done. This thesis focuses on the design of a mobile application for iOS that recommends wine in various retail locations that match a user’s taste preferences.

The goals of this thesis are to design an iOS application that recommends wine to consumers, improve upon the wine recommendation algorithms by acquiring more customer data, and …

Categorizing Blog Spam, Brandon Bevans

Master's Theses

The internet has matured into the focal point of our era. Its ecosystem is vast, complex, and in many regards unaccounted for. One of the most prevalent aspects of the internet is spam. Similar to the rest of the internet, spam has evolved from simply meaning ‘unwanted emails’ to a blanket term that encompasses any unsolicited or illegitimate content that appears in the wide range of media that exists on the internet.

Many forms of spam permeate the internet, and spam architects continue to develop tools and methods to avoid detection. On the other side, cyber security engineers continue to …

Design And Testing Of A Top Mask Projection Ceramic Stereolithography System For Ceramic Part Manufacturing, Dylan Robert De Caussin

Master's Theses

Ceramic manufacturing is an expensive process with long lead times between

the initial design and final manufactured part. This limits the use of ceramic as a viable material unless there is a large project budget or high production volume associated with the part. Ceramic stereolithography is an alternative to producing low cost parts through the mixing of a photo curable resin and ceramic particles. This is an additive manufacturing process in which each layer is built upon the previous to produce a green body that can be sintered for a fully dense ceramic part.

This thesis introduces a new approach …

Characterizing Neurotransmitter Receptor Activation With A Perturbation Based Decomposition Method, Stephen Gregory Jue

Master's Theses

The characterization of postsynaptic potentials, in terms of neurotransmitter receptor activation, is of clinical significance because information associated with receptor activation can be used in the diagnosis and study of neurological disorders. Single-unit recordings provide a method of measuring postsynaptic potentials in neurons using a microelectrode system, but yield no detailed information regarding the neurotransmitter receptors that contribute to the potential. To determine the types of neurotransmitter receptors that result in a compound postsynaptic potential from a microelectrode reading, decomposition of the potential is necessary. In this work, a perturbation-based decomposition method developed by R. Szlavik is evaluated for this …

Analysis Of Various Algorithmic Approaches To Software-Based 1200 Baud Audio Frequency Shift Keying Demodulation For Aprs, Robert F. Campbell

Master's Theses

Digital communications continues to be a relevant Field of study as new technologies appear and old methodologies get revisited or renovated. The goal of this research is to look into the old digital communication scheme of Bell 202 [67] used by APRS and improve software based demodulation performance. Improved performance is defined by being able to correctly decode more packets in an efficient, real time, manner. Most APRS demodulation is currently done using specialized hardware since that yields the best performance. This research shows that through using Sivan Toledo's javAX25 [72] software package, new demodulation algorithms can be implemented that …

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

Master's Theses

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

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

Master's Theses

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

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

Master's Theses

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

Trust And Complacency In Cyber Security, Ashley Allison Cain

Master's Theses

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

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

Master's Theses

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

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

Master's Theses

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

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

Master's Theses

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

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

Master's Theses

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

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

Master's Theses

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

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

Master's Theses

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

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

Master's Theses

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