Digital Commons Network^™

The Effects Of Cofermentation Of Cider And Apple Pomace On Cider Attributes, Abigail D. Affonso

Master's Theses

Phenolics are critical to the sensory attributes and health benefits of hard cider due to their contribution to the flavor, mouthfeel, and antioxidant activity. With the increase in demand for cider, the use of dessert apple varieties has become more common leaving ciders lacking in phenolics. However, a promising method to increase their phenolic content is through maceration with apple pomace. This study evaluated the effect maceration with apple pomace during cider fermentation on the extraction of phenolic compounds, as well as its effect on the sensory properties of the final product. For this study, ciders were fermented with 0% …

A Comparative Study Of The Effects Of Microalgae On Poultry Production, Taylor Kaitlyn O'Lear Reid

Master's Theses

Research has shown Spirulina to be a viable feedstuff in poultry production. Other species of microalgae are being studied to determine their effects on poultry production. This project compared four microalgaes: Hydrodictyon, Vaucheria, Uronema, and Spirulina and was broken down into three trials. The first experiment investigated the digestibility of an algae species, Spirulina, in broiler chicken diets. Eighty, 25-day-old Ross 708 broiler chicks were sorted into 20 metabolism cages and received one of two diets: Control Diet or Test Diet (75% basal diet + 25% Spirulina). The apparent ileal amino acid digestibility (AIAAD) of lysine, methionine, cysteine, threonine, isoleucine, …

Construction Industry Hesitation In Accepting Wearable Sensing Devices To Enhance Worker, Harrison M. Fugate

Master's Theses

The construction industry is one of the most unsafe industries for workers in the United States. Advancements in wearable technology have been proven to create a safer construction environment. Despite the availability of these devices, use within the construction industry remains low. The objective of this research is to identify and analyze the causes behind the reluctance of the construction industry to implement two specific wearable safety devices, a biometric sensor, and a location tracking system. Device acceptance was analyzed from the perspective of the user (construction field labor) and company decision makers (construction managers). A modified unified theory of …

The Impact Of High-Anthocyanin Berry Supplementation On Cardiometabolic Markers In Humans: A Systematic Review Meta-Analysis Of Randomized Control Trials, Mia M. Abram

Master's Theses

Relevance: Heart disease is the leading cause of death worldwide. Observational and experimental evidence has shown that fruits high in polyphenols can reduce morbidity and mortality of heart disease. Introduction: This systematic review meta-analysis was conducted to evaluate the current evidence for anthocyanin-rich fruit supplementation amelioration of hypertension. Methods: Articles were identified, collected, screened, then data were analyzed via CMAv.2 for overall effect on blood pressure, nitric oxide, flow mediated dilation and pulse wave velocity. Results: The analysis showed a small, significant effect on diastolic blood pressure. No moderator groups had significant effects, though some individual subcategories showed significant effects. …

Impact Of Incorporating Intuitive Eating Principles Into A College Nutrition Course On Eating Behaviors, Kira L. Minot

Master's Theses

Objective: This study aimed to assess the impact of an online introductory college nutrition course that implements evidence-based intuitive eating (IE) concepts and principles on students’ application of IE behaviors. A secondary outcome explored the relationship between student grades and changes in IE behavior implementation. Researchers hypothesized an increase in the average use of IE practices post-intervention.

Methods: This study was a non-randomized pilot intervention using pre- and post-test surveys. Enrolled students completed the intuitive eating scale-2 (IES-2) survey on the first and last days of the 16-week course. Students participated in typical nutrition coursework throughout the semester with the …

Effect Of Vine Age And Selected Winemaking Techniques On The Sensory Profile Of Central Coast Red Wines, Isabelle Lomonaco

Master's Theses

Descriptive sensory analysis is essential to understanding how differing varietals, viticultural techniques, enological techniques, vintage, regions, etc. impact the sensory characteristics found in wines. These studies analyzed the sensory impacts of vine age, whole cluster and stem addition influences, the frequency of cap management regimes, and selected fermentation variables, on 2019 Zinfandel, 2020 Syrah, 2020 Tannat, 2020 Cabernet Sauvignon, and 2021 Graciano wines respectively, from the Central Coast of California, USA. The investigation of Old vine Zinfandel indicated that these wines were defined as complex due to the wide variety of descriptors used to characterize them, having high color saturation …

Wildfire Risk Assessment Using Convolutional Neural Networks And Modis Climate Data, Sean F. Nesbit

Master's Theses

Wildfires burn millions of acres of land each year leading to the destruction of homes and wildland ecosystems while costing governments billions in funding. As climate change intensifies drought volatility across the Western United States, wildfires are likely to become increasingly severe. Wildfire risk assessment and hazard maps are currently employed by fire services, but can often be outdated. This paper introduces an image-based dataset using climate and wildfire data from NASA’s Moderate Resolution Imaging Spectroradiometer (MODIS). The dataset consists of 32 climate and topographical layers captured across 0.1 deg by 0.1 deg tiled regions in California and Nevada between …

Distribution And Ecological Function Of Pacific Lamprey In The San Luis Obispo Creek Watershed, Parker Kalan

Master's Theses

Pacific lamprey (Entosphenus tridentatus) is an endemic species to coastal watersheds along the Pacific Rim in North America and Asia. The species' geographic distribution is retracting and has not been mapped precisely, and the ability for the species to provide ecosystem services, such as water filtration, for supporting watershed management has not been tested. The San Luis Obispo Creek watershed, California, USA is at the southern end of Pacific lamprey’s retracting distribution, and the San Luis Obispo watershed is impacted by degraded water quality, making investigation of Pacific lamprey in the San Luis Obispo Creek watershed of direct …

Specialized Named Entity Recognition For Breast Cancer Subtyping, Griffith Scheyer Hawblitzel

Master's Theses

The amount of data and analysis being published and archived in the biomedical research community is more than can feasibly be sifted through manually, which limits the information an individual or small group can synthesize and integrate into their own research. This presents an opportunity for using automated methods, including Natural Language Processing (NLP), to extract important information from text on various topics. Named Entity Recognition (NER), is one way to automate knowledge extraction of raw text. NER is defined as the task of identifying named entities from text using labels such as people, dates, locations, diseases, and proteins. There …

Increasing The Effectiveness Of K-12 Stem Worshops Through Targeted Context And Creative Technolgies, Melina Lopez

Master's Theses

Economic projections reveal a need for one million more Science, Technology, Engineering, and Math (STEM) professionals over the next decade than the United States is producing at the current rate. As a result, STEM education is a major focus of recent legislation and funding in Congress as the number of STEM professionals is inadequate to support innovation and the ever-changing economy. In response to the urgent need for more competitive STEM professionals, there has been a widespread implementation of workshops, organizations, and school programs aimed at amplifying K-12 student STEM literacy and interest. Some programs are even created to specifically …

A Course On Advanced Real-Time Embedded Systems, Krista Round

Master's Theses

This thesis discusses the development of an advanced real-time embedded systems course offered at California Polytechnic State University, San Luis Obispo, which aims to prepare students to design modern complex real-time embedded systems. It describes the goals of the real-time embedded systems curriculum, which includes an introductory and advanced course. Finally, this paper discusses the challenges of creating a successful advanced real-time embedded systems course and proposes changes to the current advanced real-time embedded systems course in response to those challenges.

Design Of An Automotive Iot Device To Improve Driver Fault Detection Through Road Class Estimation, Matt Murray

Master's Theses

Unsafe driver habits pose a serious threat to all vehicles on the road. This thesis outlines the development of an automotive IoT device capable of monitoring and reporting adverse driver habits to mitigate the occurrence of unsafe practices. The driver habits targeted are harsh braking, harsh acceleration, harsh cornering, speeding and over revving the vehicle. With the intention of evaluating and expanding upon the industry method of fault detection, a working prototype is designed to handle initialization, data collection, vehicle state tracking, fault detection and communication. A method of decoding the broadcasted messages on the vehicle bus is presented and …

Bearing Fault Detection And Classification Using Artificial Neural Networks, Harnak Singh

Master's Theses

Bearings are the essential components of modern rotating machines. Bearing faults can cause severe machine damages or even breakdowns.

In recent years, artificial intelligence and deep learning have been successfully applied to fault detection. In this thesis, convolutional neural networks (CNN) are employed for bearing fault detection and classification. Computer simulations results demonstrate that the CNN based approach is advantageous over the conventional regression model, with an overall accuracy of 99.5%.

Effects Of Experimental Scale On The Adsorption Of Two Pharmaceutical Drugs Detected In Municipal Wastewater Effluent, Michael Moore

Master's Theses

Pharmaceutical drugs are being produced and consumed in increasing quantities every year and are poorly treated by conventional wastewater treatment processes, leading to increasing detection of such compounds in surface water, groundwater, and municipal drinking water. Soil aquifer treatment (SAT) is a promising method for treating these emerging compounds through combined adsorption and degradation of target compounds in soil. This thesis examines the consistency of results from typical studies like adsorption isotherms and soil columns utilized in analysis of SAT performance, across varying experimental scales. The adsorption behavior of two pharmaceuticals was investigated as a function of experimental scale and …

Improving Relation Extraction From Unstructured Genealogical Texts Using Fine-Tuned Transformers, Carloangello Parrolivelli

Master's Theses

Though exploring one’s family lineage through genealogical family trees can be insightful to developing one’s identity, this knowledge is typically held behind closed doors by private companies or require expensive technologies, such as DNA testing, to uncover. With the ever-booming explosion of data on the world wide web, many unstructured text documents, both old and new, are being discovered, written, and processed which contain rich genealogical information. With access to this immense amount of data, however, entails a costly process whereby people, typically volunteers, have to read large amounts of text to find relationships between people. This delays having genealogical …

Model-Based Design Of An Optimal Lqg Regulator For A Piezoelectric Actuated Smart Structure Using A High-Precision Laser Interferometry Measurement System, Grant P. Gallagher

Master's Theses

Smart structure control systems commonly use piezoceramic sensors or accelerometers as vibration measurement devices. These measurement devices often produce noisy and/or low-precision signals, which makes it difficult to measure small-amplitude vibrations. Laser interferometry devices pose as an alternative high-precision position measurement method, capable of nanometer-scale resolution. The aim of this research is to utilize a model-based design approach to develop and implement a real-time Linear Quadratic Gaussian (LQG) regulator for a piezoelectric actuated smart structure using a high-precision laser interferometry measurement system to suppress the excitation of vibratory modes.

The analytical model of the smart structure is derived using the …

Development Of A Body Weight Reduction Algorithm In Micro-Gravity Treadmills™, Alexander Hibbert

Master's Theses

Boost Treadmills™, a company specializing in the use of differential air-pressure (DAP) technology in the realm of exercise and rehabilitation, is developing their second-generation micro-gravity treadmill™ named the Boost 2. This machine will allow individuals in all types of fitness environments to move and exercise at a fraction of their normal body weight, reducing the impact forces on lower body extremities and allowing for accelerated returns to activity.

The purpose of this thesis was to create an algorithm to be implemented on the Boost 2 that related the percentage of body weight reduction of a user to a required pressure …

Aac And Multilingualism In Children With Complex Communication Needs: Perspectives Of Filipino Parents And Teaching Professionals, Anne Aubrey V. Dulay

Master's Theses

Parents and teaching professionals of children who use augmentative and/or alternative communication (AAC) systems within multilingual environments often face complicated decisions regarding their language choices and practices. Understanding parents’ and teaching professionals’ perceptions on this topic can assist AAC service providers in supporting them better during intervention. This study aimed to explore the perceptions of Filipino parents and teaching professionals regarding AAC and multilingualism. Specifically, this study sought to describe parents’ and teaching professionals’ language choices and practices when interacting with the AAC communicator and to describe the factors that influence their language choices and practices. This study followed a …

Unmasking Medical Fake News Using Machine Learning Techniques, Garima Chaphekar

Master's Theses

Fake news has always been a critical and challenging problem in the informationenvironment. The propagation of false news is a serious concern, especially in medical information, which can have dangerous and potentially deadly consequences. With the tsunami of online misinformation, it is crucial to fight fake medical news. In this study, we use machine learning techniques to help detect fake news related to diseases, including COVID-19, Ebola, Zika, SARS, Cancer, and Polio. To facilitate research in this space, we create a new medical dataset named MedHub. MedHub has records from two publicly available datasets on COVID and manually curated facts …

Exploring Shared Book Reading Among Mexican And Dominican Parent-Child Dyads, Maria Flores Lopez

Master's Theses

Using an ethnically diverse sample of Mexican and Dominican families from the NewYork metro area, the present study investigated the behaviors of parents and their three-yearold children, during shared book reading (SBR). The aspect of child behavior that was investigated was engagement, which was assessed by observations of children’s attentiveness and verbal participation during the reading activity. Children within this sample were highly engaged, with most demonstrating active engagement, the highest level of engagement in this study. When looking at the behaviors of parents, the use of two sets of strategies were investigated: interactive book reading strategies and language use. …

Fragmentation Drives Dominant Plant Encroachment On A Horizontal Wastewater Treatment Levee, Joia S. Fishman

Master's Theses

Urban coastal wetlands protect humans from sea-level rise while providing valuable habitat for wildlife. Degradation and loss of these wetlands threaten urban infrastructure such as wastewater treatment facilities. Nature-based adaptive solutions with the combined purposes of bioremediation, coastal defense, and habitat creation are being tested to make communities safer and more resilient. The current research examines a 6-year-old experimental horizontal levee at the Oro Loma Sanitary District in San Lorenzo, California. Using horizontal transects and quadrat sampling, I compare the success of two planting strategies – a wet meadow and a riparian scrub community – on an ecotone slope. I …

Mechanical Stabilization By Cyclic Compression Of Composite Polymer Electrolytes For Lithium-Ion Batteries, Nishad Mulay

Master's Theses

Composite polymer electrolytes (CPEs) for lithium-ion batteries provide an effectivebalance of ionic conductivity, mechanical robustness, and safety. Loss of charge capacity, however, is caused by multiple contributing factors, such as dendrite formation, changes in polymer crystallization, and reconfiguration of porous electrodes. In this thesis we specifically examine mechanical changes in the composite electrolyte layer. The hypothesis of this investigation is that the addition of rigid particles to a polymer electrolyte counteracts the fatigue softening effect caused by cyclic dimensional changes, as would be experienced during charge and discharge cycles. We apply cyclic compression to mimic stress cycling that is caused …

The Influence Of Cultural Stigma On Perceptions Of Mental Illness, Rakshitha Mohankumar

Master's Theses

The stigma of mental illness can often lead to the afflicted individual not receiving the professional help they need and thereby worsening their condition, which has serious consequences both for themselves and their loved ones. Moreover, stigma surrounding mental illness varies from culture to culture. This research study highlighted the significance of studying stigma and long-term coping with a loved one’s mental health issues across cultures. Differences in perceptions of mental health based on the type of culture and (in)experience of growing up with someone who had mental health issues were tested. I predicted that there were main effects of …

Association Between Stone Fruit Intake And Markers Of Cardiovascular Disease Risk Among United States Adults: Nhanes 2017-2018, Lasya S. Shah

Master's Theses

Cardiovascular Disease (CVD) is the most common cause of mortality in the world affecting people from all backgrounds. There is abundant evidence supporting diet affecting the risk for CVD. The consumption of fruits and vegetables is inversely related to CVD risk factors, likely due to their content of phenolic compounds. Although stone fruits contain high quantities of phenolic compounds, it remains unclear if their intake is associated with CVD risk. In this study, data from the National Health and Nutrition Examination Survey 2017-2018 were used to estimate the consumption level of stone fruits and whether it was associated with CVD …

The Spatial Distribution Of Mercury Contamination In The Yolo Bypass, California, Thomas S. Mykytyn

Master's Theses

Gold and mercury mining in the latter half of California’s 19th century resulted in massive and lingering alterations to downstream ecosystems through sedimentation and mercury contamination. Located at the confluence of Sierra Nevada and Coast Range watersheds, the Yolo Bypass is a critical conveyor of flood waters from the Lower Sacramento Valley to the Sacramento–San Joaquin Delta. Sedimentation in the bypass diminishes its flood conveyance capacity, and Hg contamination is hazardous to humans and ecosystems. The purpose of this study is to locate and quantify mercury contamination in the Yolo Bypass. Concentrations of total mercury ([THg]) were measured in 22 …

Smartrec - A Smart Conversational Recommendation System Using Semantic Knowledge Graphs, Sudha Vijayakumar

Master's Theses

CRS strives to return the most relevant recommendations to users through a multi-turn interactive conversation. The Covid-19 pandemic has undoubtedly accelerated the pace of adoption of conversational AI systems by many online platforms needing to provide highly available customer support. This ongoing demand calls for the need to implement more generic and efficient conversational agents and recommendation engines that can provide customers with the required information at every stage of the user’s interaction with the e-commerce platform. This study presents a Smart Conversational AI-based recommendation system - SMARTREC, which enables a multi-turn conversation with the user to understand the context …

Diet Quality, Diet Motives, And Nutrition Literacy Of Vegans, Vegetarians, And Semi-Vegetarians, Sapna J. Peruvemba

Master's Theses

Individuals consuming plant-based diets have shown favorable dietary behaviors and diet quality. However, differences in diet quality considering motivations to adopt plant-based (vegan, vegetarian, and semi-vegetarian) diets and nutrition literacy, are not well known. The primary objective of this study was to assess diet quality, diet motives and nutrition literacy in vegans, vegetarians, and semi-vegetarians. The secondary objective was to investigate the association between diet motives and dietary quality. In this cross-sectional study, 223 participants completed an online survey and food frequency questionnaire. The study used the Healthy Eating Index-2015 to measure dietary quality, the Food Choice Questionnaire to measure …

The Modern-Day Effect Of Holc Redlining On Neighborhood Development, Liubov Ivashov

Master's Theses

Racial segregation, which happened more than one hundred years ago in the U.S., is a fundamental cause of economic inequality for people living in historically segregated neighborhoods today. Redlining was one form of federal policy that forced to separate communities by race even more after the Great Depression. The Home Owners Loan Corporation (HOLC) maps are widely used in economic research papers as one of the most comprehensive sources of data available to measure the effect of residential segregation. In this paper, using the Historical Redline Score (HRS) method, the author measured the association between modern-day population distribution, rent prices, …

Sexual And Reproductive Health Care For Undocumented Californians: Universal Health Care & Reproductive Justice, Josephine Emily Roberts

Master's Theses

Universal Health Care can hardly be achieved if the Sexual Reproductive Health needs of a population are not met. In other words, Sexual and Reproductive Health and Universal Health Care are mutually reinforcing, and the state of California should consider this when implementing Medi-Cal health care for all Undocumented Californians. In 2016, California implemented an extension of Medi-Cal treatment to undocumented children up to 26 years of age. Comparable to the United States Federal Medicaid program aimed to help cut health care costs for low-income and vulnerable populations, Medi-Cal offers some coverage for emergency medical services to undocumented individuals of …

Violencia En Tránsito: Exploring The Multiplicities Of Violence That Shape Central American Migrant Women's Experiences Through Mexico And The Role Of Albergue Abba, Esmeralda Cardona

Master's Theses

The purpose of this study is to analyze the forms of state and non-state violence that migrant women1 from the Northern Triangle of Central America experience during their migration into Mexico and the role of Albergue Abba in Celaya, Guanajuato in their transit. As migrant women venture northward, they are vulnerable to being coerced and kidnapped while encountering gender-based violence, including rape, sexual assault, and human trafficking. While migrants suffer a multiplicity of violence in this region, this research will focus on the role of smuggling and human trafficking in order to better understand the vulnerabilities women migrants experience in …