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Strategies For Increased Lactic Acid Production From Algal Cake Fermentations At Low Ph By Lactobacillus Casei, Tom J. Overbeck

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

We explored using de-oiled algal biomass (algal cake) as a low-value substrate for production of lactic acid in fermentations with Lactobacillus casei, and strategies for increasing lactic acid production at low pH. L. casei 12A algal cake (AC) fermentations showed carbohydrate and amino acid availability limit growth and lactic acid production. These nutritional requirements were effectively addressed with enzymatic hydrolysis of the AC using α-amylase, cellulase, and pepsin. Producing 0.075 g lactic acid per g AC from AC digested with all three enzymes. We explored heterologous expression of the cellulase gene (celE) from Clostridium thermocellum and the …

Mechanical Performance Of Natural / Natural Fiber Reinforced Hybrid Composite Materials Using Finite Element Method Based Micromechanics And Experiments, Muhammad Ziaur Rahman

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A micromechanical analysis of the representative volume element (RVE) of a unidirectional flax/jute fiber reinforced epoxy composite is performed using finite element analysis (FEA). To do so, first effective mechanical properties of flax fiber and jute fiber are evaluated numerically and then used in evaluating the effective properties of flax/jute/epoxy hybrid composite. Mechanics of Structure Genome (MSG), a new homogenization tool developed in Purdue University, is used to calculate the homogenized effective properties. Numerical results are compared with analytical solution based on rule of mixture, Halpin-Tsai as well as Tsai-Hahn equations. The effect of the volume fraction of the two …

Combinatorial Games On Graphs, Trevor K. Williams

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Combinatorial Games are intriguing and have a tendency to engross students and lead them into a serious study of mathematics. The engaging nature of games is the basis for this thesis. Two combinatorial games and some educational tools are presented which were developed by the author in the pursuit of the solution of these games.

To What Extent Might Beaver Dam Building Buffer Water Storage Losses Associated With A Declining Snowpack?, Konrad Hafen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Dams built by North American Beaver create natural water storage and slow water as it moves through streams. In portions of streams with beaver dams, these effects have been observed to decrease the peak magnitude of floods and increase base flow during annual summer droughts. In the western United States changes to streamflow patterns have been observed in recent decades with large spring floods coming earlier in the year, causing annual summer droughts to start earlier and last longer. These changes are linked to decreasing snowpack which acts as the most significant natural water storage reservoir by holding onto precipitation …

Detecting Malicious Campaigns In Crowdsourcing Platforms, Hongkyu Choi

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Crowdsourcing sites such as Mechanical Turk and Crowdflower provide a marketplace where requesters create tasks and recruit workers, who may perform certain tasks in order to get financial compensation. Anyone in the world can be a requester and/or a worker as long as he/she has the Internet connection. Crowdsourcing creates a new way to solve various tasks by using “human computation power”. However, crowdsourcing has been misused by malicious requesters and unethical workers for account generation, search engine optimization, content and link generation, ad posting and spam mailing, and social network linking. It creates new threats to the Web system. …

Power Analysis Of Continuous Data Capture In Beepi, A Solar- Powered Multi-Sensor Electronic Beehive Monitoring System For Langstroth Beehives, Keval Shah

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Honey bee (Apis mellifera) is one of the most important pollinating species in agriculture. The decline in the bee population worldwide is a sign of something going amiss in the environment. This decrease in the population is attributed to the Colony Collapse Disorder (CCD). In this thesis, a power analysis is presented of a solar-powered, multi-sensor electronic beehive monitoring (EBM) system. EBM may contribute to our understanding of the major factors affecting the health of honeybee colonies without disturbing the colonies' daily behavioral patterns or putting extra burdens on beekeepers. The EBM system analyzed in this thesis runs …

Increasing Knowledge And Detection Of Racial And Ethnic Microaggressions In White College Students, Christina A. Patterson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Scholars have strongly suggested that to combat microaggressions and their impact on persons of color, there needs to be an increased awareness and ability to detect microaggressions when they occur. There is limited research on how to practically address these concerns. This study examined the efficacy of a multimedia intervention aimed at increasing White individuals’ ability to accurately detect microaggressions. The high-exposure intervention was compared against two other conditions, low-exposure and control, at pre-, post-, and 1-week follow-up from intervention.

Undergraduate university students were recruited from two predominantly white universities (PWU). Participants watched a series of videos to determine if …

Impact Of Climate Variability On The Frequency And Severity Of Ecological Disturbances In Great Basin Bristlecone Pine Sky Island Ecosystems, Curtis A. Gray

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Many high elevation conifer species, including high elevation five needle pines, are declining throughout western North America. Warming temperatures, mountain pine beetle, white pine blister rust and alteration of naturally occurring fire regimes represent an interactive set of circumstances leading to greater risk. The loss of these treeline pines can detrimentally impact biodiversity and valuable ecosystem services including wildlife habitat, watershed and soil protection, aesthetics and recreation. Great Basin bristlecone pine ecosystems are naturally highly fragmented because of their elevational requirements. However, they may become even more fragmented due to combined impacts of warming temperature, insects and diseases listed above. …

Extension Of Behavioral Momentum Theory To Conditions With Changing Reinforcer Rates, Andrew R. Craig

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Behavior is more likely to persist when disrupted in some way in the presence of stimuli correlated with frequent delivery of reward than in the presence of stimuli correlated with infrequent rewards. In laboratory investigations, the correlation between reward rates and specific stimuli are almost always held constant before testing for persistence. In the real world, however, how often rewards are encountered is likely to vary substantially over time. The major goal of the work described in this dissertation was to explore effects of reward rates that change over time on persistence of behavior in controlled laboratory settings using pigeon …

Vision-Based Control Of A Full-Size Car By Lane Detection, N. Chase Kunz

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Self-driving cars are an area of increasing investment for researchers and auto manufacturers. Integration has already begun for such vehicles in urban environments. An essential aspect of navigation in these areas is the ability to sense and follow lane markers. This thesis focuses on the development of a self-driving, full-size, electric car which uses only a camera and lane markers to stay on the road. A complete method for automation is shown for a stock vehicle. Discussion includes reverse engineering of the steering, braking, and acceleration signals, as well as methods for lane detection and full-vehicle control.

Innovation In Intelligence: An Analysis Of U.S. Marine Corps Intelligence Modernization During The Occupation Of Haiti, 1915-1934, Laurence M. Nelson Iii

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Increasing modernization in military technology and methodology occurred during the beginning of the twentieth century. These changes had a direct effect on how U.S. Marines practiced military intelligence during the occupation of Haiti from 1915- 1934. The use of military intelligence had an impact on the outcome on the occupation but was not the only factor that contributed to U.S. military victories. My thesis explains that the improvement of intelligence methods used by Marines in Haiti occurred as a result of outside influence, changing circumstance in Haiti, and individual agency. Major failures had occurred that allowed resistance to grow unchecked …

A Pattern Language For Designing Application-Level Communication Protocols And The Improvement Of Computer Science Education Through Cloud Computing, Jorge Edison Lascano

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Enterprises that develop software use current technology because of its proven advantages and to accelerate and improve the software development process. Nevertheless, it is difficult to be up-to-date for most professionals in the area. Although students from higher academic institutions need to learn these new tools, and their main purpose is to learn how learn; colleges still need to prepare students for modern enterprise requirements, so they teach new technologies to improve students’ skills. Ubiquitous computing is software and services available everywhere, for example in mobile devices, in different locations, in different networks. This computing requires good communication protocols so …

Assessment Of The Impact Of The Premarital Interpersonal Choices And Knowledge (Pick) Program On Adolescents, Raquel R. Boehme

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study was conducted to determine if the information from the Premarital Interpersonal Choices and Knowledge (PICK) program How to Avoid Falling for a Jerk/ette helped positively change adolescents’ attitudes about relationships. The program was taught to 9,130 high school students (ages 14 -18) from 35 different high schools in a Western state.

Surveys were given at the beginning of the first class (pretest) and at the end of the final class (posttest). In addition to demographic information, students rated (1) their attitudes about what it takes to get to know a potential partner, (2) their belief that love alone …

Developing A General Methodology For Evaluating Composite Action In Insulated Wall Panels, Jaiden Thomas Olsen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Precast Concrete Sandwich Panel Walls (PCSPW’s) have been in use for over 60 years. They provide a very efficient building envelope for many buildings. Characteristic PCSPW’s comprise an outer and inner layer (or wythe) of concrete separated by an insulating material. To use all of the material as efficiently as possible, the layers are attached by connectors which penetrate through the insulating layer and are embedded in either concrete wythe. These connectors make it possible for both layers of the wall to work together when resisting loads. The connectors are made out of plastic, or FRP, to prevent heat transfer …

Statistical Models Of I-15 Bridge C-846: Changes In Natural Frequencies Due To Temperature, Gilbert Nichols

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Structural Health monitoring is to determine the condition of a bridge based on instrument measurements. The C-846 Bridge in Salt Lake City has such instrumentation. The bridge is located in Salt Lake City at about 2100 South and Interstate 15. This bridge has two kinds of instruments on it: accelerometers and thermocouples. The accelerometers measure the vibrations of the bridge. The accelerometers have been recording data on the bridge since 2001. The thermocouples, which measure temperature, were added as part of this thesis in April 2016.

In light of recent research, damage may be detected from measuring the change in …

Optimization Of Roadway Electrification Integrating Wireless Power Transfer: Technoeconomic Assessment And Lifecycle Analysis, Braden J. Limb

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Electric vehicles are the main technology currently being pursued to reduce dependence on fossil fuels in the transportation sector. These vehicles provide both reduced greenhouse gas emissions and decreased operating costs when compared to conventional internal combustion vehicles, while providing the flexibility to use both renewable and fossil energy. However, these vehicles have seen limited consumer adoption due to their large purchase prices and limited driving range. Both purchase price and driving range are related to the large onboard battery systems required for electric vehicle travel.

One solution to decrease dependence on large battery systems has focused on charging vehicles …

Integrated Life Cycle And Techno-Economic Assessment Of The Conversion Of High Productivity, Low Lipid Algae To Renewable Fuels, Chad R. De Mill

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The production of alternative transportation fuels is imperative to meet future energy demands without contributing to global climate change. Advances in alternative processing techniques that have emerged due to interest in microalgae as a feedstock have led to a variety of potential processing pathways for the production of bio-based fuels. A major hurdle in the algal production process is maintaining a fast and stable algae culture. Monocultures, developed for their high lipid content, suffer from low productivity, are susceptible to crashes and require a constant supply of carbon dioxide to maintain productivity. In an effort to circumvent these obstacles, algal …

Transportation Related Challenges For Persons With Disabilities, Graydon Bascom

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Gaining access to transportation is essential for obtaining employment, education, healthcare, and social interaction. Individuals who face difficulties in gaining this access are considered ‘transportation disadvantaged’ and include individuals of lower socioeconomic status, aging individuals, and persons with disabilities. In our autodependent society, individuals with disabilities face even fewer opportunities to interact within their communities. In order to better understand how individuals with disabilities are limited by their access to transportation, two studies were conducted.

The first study specifically seeks to examine how individuals with disabilities gain access to transportation and the interpersonal relationships that affect opportunities for social participation …

Participation In Dual Language Immersion Programs: Using Theory Of Planned Behavior To Predict Enrollment, Andrea Call

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Many theories have been developed to help explain and predict human behavior. Ajzen’s Theory of Planned Behavior (TPB) holds that behavior is based on behavioral intention, as well as attitudes, subjective (or social) norms, and perceived behavioral control. According to the TPB mode, perceived behavioral control moderates (or influences) the effect of behavioral intentions on behavior. Previous research has focused on the application of TPB to health behaviors, although some research has been done in educational situations. In addition, dual language immersion (DLI) programs are increasing in popularity, particularly in Utah. The Utah model begins in first grade, and follows …

Uncertainty Of Stereo Piv Calibration And Self-Calibration, Braydon J. Williams

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Particle image velocimetry (PIV) is a widely used fluid measurement technique. Three dimensional PIV data or stereo PIV is acquired using two cameras. Stereo cameras are calibrated from camera coordinates, pixels, to real world units such as millimeters using calibration models. Stereo calibration is fundamental to the accuracy of a PIV measurement. In this thesis, the accuracy of the stereo calibration is assessed. The mean error of stereo calibration was found to be 0.23%.

Propagating Perfection: Eugenic Sterilization At The Utah State Training School, 1935 - 1974, Jennifer Rust

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Compulsory sterilization as a tool of eugenics occurred in the United States from before the U.S. Supreme Court upheld its’ constitutionality in 1927 until the early 1970s. Initial justification for removing a person’s ability to procreate was rooted in hereditarian assertions that disability was transmitted from parent to offspring, and incorporated an economic argument that individuals with disabilities placed a financial burden on the state for care. Due to scientific deconstruction of the hereditarian argument, rationalization for sterilization evolved into an anxiety over the perceived inability of the disabled to parent. The state of Utah sterilized 738 individuals with intellectual …

Attitudes And Experiences Of Close Interethnic Friendships Among Native Emerging Adults: A Mixed-Methods Investigation, Merrill L. Jones

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Members of small minority groups like Natives, along with other minority groups that are rapidly growing in population are increasingly receiving research focus. With 1 in 3 U.S. residents identifying with racial or ethnic minority groups, close interethnic relationships are likely to increase as well. It will be important to understand processes of close friendship development between racially-different friends, along with the factors that help establish and maintain these close interethnic friendships. This information will be especially important for members of small minority groups, such as Natives.

We investigated Native friendship development and factors of close friendship with non-Native emerging …

Activities And Quality Of Life For Persons With Dementia, Cassidy Rose

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study was conducted to better understand how activities may impact quality of life on dementia care units. Researchers observed dementia care units, and looked into how different activity types impacted emotional affect in the person with dementia, and how they elicited different levels of positive staff interaction. Results indicated that there were significantly higher levels of positive affect from participants on certain activity types, compared to no activity. Activities that had high levels of staff to client interactions had more positive affective outcomes. Researchers concluded that quality activities should consider the environment, staff ratio, staff communication and interaction, engagement …

Comparing The Effect Of Carbon Sources, Lactate And Whey, On Biological Reductive Dechlorination Of Tce In Laboratory Flow Through Columns, Sarah M. Kissell

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Trichloroethylene (TCE) is a chlorinated solvent most commonly used as an industrial degreaser for cleaning mechanical equipment. Historic improper management and disposal of TCE has resulted in contaminated soil and groundwater across the United States, including Hill Air Force Base in Utah. The abundance of TCE in the environment presents a public health risk because it is categorized as a Group 1 carcinogen by the International Agency for Research on Cancer (IARC).

The purpose of this study was to improve the bioremediation techniques of biostimulation and bioaugmentation. A continuous flow-through column study was performed where columns packed with aquifer material …

Diversity-Related Experiences Among College Students In The Promotion Of Social Justice Orientation, Multicultural Openness, And Community Involvement, Alexandra K. Reveles

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Institutions of higher education serve students in more ways than simply fostering academic growth. University and college campuses are often the introduction people have to the societal, interpersonal, and career/field specific expectations they will be guided by after completing their degree. One way for universities to do this is through the cultivation of critical consciousness by way of encouraging engagement in diversity-related activities. This study examined associations between engagement in diversity-related activities and reported levels of critical consciousness, along with differences between students of color and White students in patterns of association.

Diversity-related experiences, including extracurricular diversity activities, positive cross-racial …

Direct And Indirect Effects Of Climate Change On Plant Populations And Communities In Sagebrush Steppe, Andrew R. Kleinhesselink

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Rapid climate change presents humanity with a number of big problems. Foremost among these is the sad fact that the climate we will pass on to our children will likely be nothing like the climate that we inherited from our parents. Ecologists have collected solid evidence that climate change has already begun to affect the living things around us and the ecosystems humans depend on. Unfortunately, predicting the future effects of climate change on life on earth is not easy. We focused on three research goals as part of an effort to improve our ability to predict how plants and …

Unmanned Aerial Vehicle Tracking System With Out-Of-Sequence Measurement In A Discrete Time-Delayed Extended Kalman Filter, Roque Lora

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The goal of this thesis is to extend the delayed Kalman filter so it can be used with non-linear systems and that it can handle randomized delays on the measurements. In the particular case of this study, the filter is used to estimates the states of an unmanned aerial system. The outputs of the filter are used to point an antenna and a camera towards a UAS. Different scenarios are simulated for the purpose of comparing the efficiency of this technique in various situations.

A Comparison Of Design Processes Between Sustainable Sites Certified And Noncertified Urban Open Space Projects, Jennifer A. Wiseman

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In response to the World Commission on Environment and Development’s Brundtland Report (1987) and other documents that have brought the need to address environmental, economic, and social issues to the forefront of the awareness of the public, the Sustainable SITES Initiative was modeled after LEED certification and was formed to establish a rating system and comprehensive framework of guidelines for development. It is a collaborative effort between the ASLA, the Lady Bird Johnson Wildflower Center, and the United States Botanic Garden. In June 2015, the Green Building Certification, Inc. of the United States Green Building Council acquired SITES and will …

Utah Elementary School Principals’ Preparation As Technology Leaders, Nathan L. Esplin

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The rapidly expanding use of technology in education has brought about the need for principals to be prepared as technology leaders. Although, there is a need for principals to be prepared as technology leaders, many currently are not prepared for this role. It is crucial that principals are prepared in order ability to lead their school in successful technology integration. The primary purpose of this quantitative study was to determine the perceived level of technology leadership preparation of Utah elementary principals using the International Society for Technology in Education (ISTE) Standards for Administrators.

In addition to the study’s primary purpose, …

The Use Of The Performance Diagnostic Checklist For Human Services To Increase Paraeducators’ Effective Implementation Of Error-Correction Procedures During Discrete Trial Training, Melissa Bowe

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Employees in the field of human services can influence the health and rate of progress of the clients they serve. A human service supervisor’s responsibilities include identifying why an employee may be performing poorly and provide an effective intervention to ensure improved performance. The Performance Diagnostic Checklist for Human Services (PDC-HS) has been used in treatment clinics to identify the variables that can contribute to poor employee performance, and subsequently recommend an intervention to improve performance.

The special education classroom is a human service setting in which special education teachers supervise paraeducator’s skills and performance. A paraeducator’s role includes providing …