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Advancement To The Highest Faculty Ranks In Academic Stem: Explaining The Gender Gap At Usu, Helga Van Miegroet

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Science and technology (S&T) disciplines at universities are still largely dominated by men, and few women are found in the highest employment ranks. Using the faculty data from Utah State University, this thesis explores the factors that help explain the difference in career trajectory between men and women in the S&T colleges. While there were few women in S&T colleges prior to the 1990s, more women have been hired since then, and the lower ranks of the faculty corps are starting to reflect the gender composition of the doctoral degree holders in the different fields. This is not the case …

The Influence Of Multiyear Drought-Driven Habitat Loss On The Bear Lake Sculpin (Cottus Extensus) And The Bear Lake Strain Of The Bonneville Cutthroat Trout (Oncorhynchus Clarkii Utah), Hayley C. Glassic

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Multiyear drought is expected to increase in occurrence and severity in dry regions across the world, such as the American Southwest, endangering native species and ecosystem health. The effects of multiyear drought are often worsened by human water use for consumption, energy production, and agriculture, which, in lakes and reservoirs, cause reduced lake elevation. Reductions in lake elevation may leave previously submerged habitat stranded along shorelines and make tributaries inaccessible to fishes. Here, we show that decreasing lake elevation, associated with drought and water withdrawal, reduces the availability of shoreline cobble habitat to fishes and increases tributary distance by creating …

Understanding The Late Mesoproterozoic Earth System From The Oldest Strata In Grand Canyon: C-Isotope Stratigraphy And Facies Analysis Of The 1254 Ma Bass Formation, Grand Canyon Supergroup, Az., Usa, Erin C. Lathrop

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Rocks provide insight into ancient times before complex animals existed. The oldest sedimentary rocks in Grand Canyon (the Bass Formation) allow us to glimpse into what things might have been like over a billion years ago. These rocks record the time known as the Mesoproterozoic Era (1.6 to 1.0 billion years ago), otherwise known as the ‘boring billion’. These rocks are thought to be the right age to indicate the end of an oddly stable world when continents were quiet and life was calm, yet they predate younger rocks that record extreme events. The Bass Formation, some of the only …

Standard Machine Learning Techniques In Audio Beehive Monitoring: Classification Of Audio Samples With Logistic Regression, K-Nearest Neighbor, Random Forest And Support Vector Machine, Prakhar Amlathe

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Honeybees are one of the most important pollinating species in agriculture. Every three out of four crops have honeybee as their sole pollinator. Since 2006 there has been a drastic decrease in the bee population which is attributed to Colony Collapse Disorder (CCD). The bee colonies fail/ die without giving any traditional health symptoms which otherwise could help in alerting the Beekeepers in advance about their situation.

Electronic Beehive Monitoring System has various sensors embedded in it to extract video, audio and temperature data that could provide critical information on colony behavior and health without invasive beehive inspections. Previously, significant …

Methods For The Aerostructural Design And Optimization Of Wings With Arbitrary Planform And Payload Distribution, Jeffrey D. Taylor

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The design of an aircraft wing often involves the use of mathematical methods for simultaneous aerodynamic and structural design. The goal of many of these methods is to minimize the drag on the wing. A variety of computer models exist for this purpose, but some require the use of expensive time and computational resources to give meaningful results. As an alternative, some mathematical methods have been developed that give reason ably accurate results without the need for a computer. However, most of these methods can only be used for wings with specific shapes and payload distributions. In this thesis, a …

Bovine Mastitis Resistance: Novel Quantitative Trait Loci And The Role Of Bovine Mammary Epithelial Cells, Jacqueline P. Kurz

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Bovine mastitis, or inflammation of the mammary gland, has substantial economic and animal welfare implications. A genetic basis for mastitis resistance traits is recognized and can be used to guide selective breeding programs. The discovery of regions of the genome associated with mastitis resistance, and knowledge of the underlying molecular mechanisms responsible, can facilitate development of efficient mastitis control and therapeutic strategies. The objectives of this dissertation research were to identify sites of genetic variation associated with mastitis resistance, and to define the contributions of the milk-secreting epithelial cells to mammary gland immune responses and mastitis resistance. Twenty seven regions …

Evaluating Water Filtration And Disinfection For Household, Using Slow Sand Filters Plus Solar Disinfection, Mariana Demitry

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In this research, a household water treatment system was built and evaluated as a trial for improving the drinking water quality of the Nile River for the low-income communities. The system consisted of household-scale slow sand filters, and transparent polyethylene terephthalate-bottles for solar disinfection. The evaluation of the system depended on the removal/inactivation of some surrogates for the reference pathogens, and turbidity. The reference pathogens are pathogens specified by the World Health Organization to evaluate the efficiency of the household water treatment options. They were chosen to represent the classes of pathogens in water (bacteria, viruses, protozoa). The surrogates used …

Evaluating The Impact Of External Carbon Source In Laboratory-Based Denitrification Rate Experiments, Jared Richens

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Limitations in the quality of transformation rates used with water quality models such as QUAL2K have led to the need to identify methods that can effectively and accurately determine these rates. During the early stages of method development of a Utah Department of Environmental Quality (Utah DEQ) funded project seeking to identify such methods, it was determined that under certain situations external carbon amendment may be required to successfully determine denitrification rates.

The focus of this study was to evaluate the potential impacts that introducing external carbon sources may have on estimating the laboratory denitrification rates resulting from these methods. …

Three Environmental Fluid Dynamics Papers, Eden Furtak-Cole

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Three papers are presented, applying computational fluid dynamics methods to fluid flows in the geosciences. In the first paper, a numerical method is developed for single phase potential flow in the subsurface. For a class of monotonically advancing flows, the method provides a computational savings as compared to classical methods and can be applied to problems such as forced groundwater recharge. The second paper investigates the shear stress reducing action of an erosion control roughness array. Incompressible Naiver-Stokes simulations are performed for multiple wind angles to understand the changing aerodynamics of individual and grouped roughness elements. In the third paper, …

Evaluation Of Oocyte Developmental Competence And Potential Strategies To Improve Oocyte Quality, Min Yang

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Assisted reproductive technologies (ARTs) have now been extensively used to promote reproductive efficiency as a fertility treatment not only in human medicine but also animal reproduction. ARTs serve as an important tool to advance the fundamental knowledge of reproductive processes. The quality of female’s eggs defines its ability to undergo maturation, fertilization, and development. This quality is determined by various factors and is crucial for the success of ARTs. Any alternations happening during the egg growth and maturation process can result in the decreased quality, which could have long-lasting effects on development. Improving the developmental efficiency of the egg is …

Thrust Augmented Nozzle For A Hybrid Rocket With A Helical Fuel Port, Joel H. Marshall

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A thrust augmented nozzle for hybrid rocket systems is investigated. The design lever-ages 3-D additive manufacturing to embed a helical fuel port into the thrust chamber of a hybrid rocket burning gaseous oxygen and ABS plastic as propellants. The helical port significantly increases how quickly the fuel burns, resulting in a fuel-rich exhaust exiting the nozzle. When a secondary gaseous oxygen flow is injected into the nozzle downstream of the throat, all of the remaining unburned fuel in the plume spontaneously ignites. This secondary reaction produces additional high pressure gases that are captured by the nozzle and significantly increases the …

Content Analysis Of Affordances For Social And Emotional Competency Development In Third-Grade Core Reading Programs, Lisa Trottier Brown

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this content analysis study was to identify opportunities embedded in selected reading programs that facilitate the development of social and emotional competencies in the context of literacy instruction. These competencies have been shown to strengthen academic performance and help children learn skills that accelerate success inside and outside of the classroom. The content analysis examined three commonly used third-grade core reading programs to identify content that focuses on social and emotional competencies and instructional processes important in teaching social and emotional skills to children. The study also sought to identify content and instructional processes that might be …

A Grounded Case Study Of Parental Perceptions Surrounding Formalized Special Education Processes, William Eric Strong

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In this dissertation, I explore, through qualitative means, the perceptions of parents related to discourse (what is said and not said) within formalized and required processes of special education. These processes are federal requirements that parents of children with disabilities or suspected disabilities encounter as their children progress through the school system. The processes purportedly protect the rights of children with disabilities. The goal of the process is to help children with disabilities make academic gains by providing scaffolds that meet their individual needs.

During this process, parents of children with disabilities become empowered or disempowered by discourses focused on …

A Series Of Papers On Detecting Examinees Who Used A Flawed Answer Key, Marcus W. Scott

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

One way that examinees can gain an unfair advantage on a test is by having prior access to the test questions and their answers, known as preknowledge. Determining which examinees had preknowledge can be a difficult task. Sometimes, the compromised test content that examinees use to get preknowledge has mistakes in the answer key. Examinees who had preknowledge can be identified by determining whether they used this flawed answer key. This research consisted of three papers aimed at helping testing programs detect examinees who used a flawed answer key.

The first paper developed three methods for detecting examinees who used …

Size-Scale Effects Of Nonlinear Weir Hydraulics, Nathan L. Young

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Experimental physical model studies of hydraulic structures are often conducted to replicate flow behavior that may occur at the prototype scale. Geometric similitude is most often maintained between the prototype and model when studying reservoir and open channel hydraulic structures to account for the dominant gravity and inertia forces while other fluid forces (e.g., viscosity,surface tension) are assumed negligible. However, as model size and/or upstream head decreases, other fluid forces can exceed the negligible level and influence model flow behavior. This phenomenon is referred to as size-scale effects and is one potential origin of error in predicting the prototype behavior …

Professional Development Needs Of Utah State University Extension Professionals, Callahan K. Ward

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Many Utah State University (USU) Extension personnel are nearing retirement age. The purpose of this study was to identify professional development needs of Extension professionals and assess USU Extension by evaluating competencies essential to be a successful Extension professional. USU Extension can conduct more beneficial professional development training by using identified high priority competencies and improve the on boarding process for new Extension professionals. With improvements as suggested, the effectiveness of professional development could be enhanced and produce Extension professionals who work more efficiently and are committed to the success of USU Extension.

Breeding Season Ecology And Demography Of Lesser Scaup (Aythya Affinis) At Red Rock Lakes National Wildlife Refuge, Jeffrey M. Warren

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

It is hypothesized that individuals make reproductive decisions based on current assessments of their physiological condition and environmental conditions. For female lesser scaup (Aythya affinis), breeding occurs after an energetically costly spring migration. Increasing fat reserves (i.e., ‘body condition’) prior to breeding allows a female to produce a larger clutch of eggs, but time spent gaining body condition is costly in terms of time allowed to raise ducklings before freezing conditions in the fall. In Chapter 2 I explored rate of pre-breeding body condition gain in female lesser scaup, and how that rate influenced clutch size. Spring phenology, …

In-Situ Educational Research From Concept To Classroom Implementation: A Multiple Paper Dissertation, David Mark Weiss

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

An educational researcher sought to collaborate with a classroom instructor to introduce problem-based learning as a new teaching intervention. First, a classroom instructor was approached to consider how a problem-based learning instructional approach might fit with their existing curriculum plan. The researcher and the classroom teacher used a discussion framework to decide together how to best design a professional learning course meant to prepare the teacher to use the new techniques in their classroom. The teacher took the professional learning course and subsequently designed his own problem-based learning course. That course was then delivered to undergraduate students in a college …

Advancing The Implementation Of Hydrologic Models As Web-Based Applications, Prasanna Dahal

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Deeper understanding of relationships between flow in river sand various hydrologic elements such as rainfall, land use, and soil type is imperative to solve water related problems like droughts and floods. Advanced computer models are becoming essential in helping us understand such relationships. However, preparing such models requires huge investment of time and resources, much of which are concentrated on acquisition and curation of data. This work introduces agree and open source web Application (web App) that provides researchers with simplified access to hydrological data and modeling functionality. The web App helps in the creation of both hydrologic models, and …

Simulation And Optimization Models To Evaluate Performance Of Aquifer Storage And Recovery Wells In Fresh Water Aquifers, Ali Forghani

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Aquifer storage and recovery (ASR) involves artificially recharging an aquifer through well(s) using surplus water for later recovery in high-demand months. The operators of the studied ASR system developed the system as a means of receiving additional water rights to supplement their pre-existing water rights for extraction in dry months. However, the region’s water regulators define the performance of this ASR system as the amount of the injected water that is recoverable from the same wells during extraction periods. The study proposes recovery effectiveness (REN) as the performance index of this ASR system. REN equals the injectate proportion that the …

Investigating The Climatology Of Mesospheric And Thermospheric Gravity Waves At High Northern Latitudes, Michael Negale

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

An important property of the Earth's atmosphere is its ability to support wave motions, and indeed, waves exist throughout the Earth's atmosphere at all times and all locations. What is the importance of these waves? Imagine standing on the beach as water waves come crashing into you. In this case, the waves transport energy and momentum to you, knocking you off balance. Similarly, waves in the atmosphere crash, known as breaking, but what do they crash into? They crash into the atmosphere knocking the atmosphere off balance in terms of the winds and temperatures. Although the Earth's atmosphere is full …

Managing For Multiple Objectives In Southwestern Forests: Evaluating The Trade-Offs Between Enhancing Mexican Spotted Owl Nest Habitat And Mitigating Potential Crown Fire, Daniel C. Deane Mckenna

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Forest Inventory and Analysis (FIA), the United States’ forest census, measured sixty-six Mexican spotted owl nest stands in order gain insight into the structure and composition of the nest habitat of this threatened species. I used these data, along with the greater FIA database and the Forest Vegetation Simulator to explore questions surrounding the management of Mexican spotted owl habitat, specifically how to balance the objective of sustaining and enhancing nest habitat in face of increasing forest fire size and severity in the Southwest. My research consisted of three studies. The first study quantified the structure and composition of …

Using Remotely Piloted Aircraft And Infrared Technology To Detect And Monitor Greater Sage-Grouse, Thomas R. Thompson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In wildlife management, using cutting edge technology and science to monitor greater sage-grouse (Centrocercus urophasianus; sage-grouse) populations, enables land managers to better assess the impact of their management decisions. Having precise counts of sage-grouse lek attendance, and specifically male lek attendance, is an important metric used to evaluate population status and response to conservation actions (Gifford et.al, 2013, Dahlgren et al., 2016). Leks are seasonal breeding sites where males perform a ritualistic courtship dance for females.

Our case study examined if a Remotely Piloted Aircraft (RPA) was effective in detecting, and counting, sage-grouse during the lek season (early …

Marginal Mediation Analysis: A New Framework For Interpretable Mediated Effects, Tyson S. Barrett

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Mediation analysis is built to answer not only if one variable affects another, but how the effect takes place. However, it lacks interpretable effect size estimates in situations where the mediator (an intermediate variable) and/or the outcome is categorical or otherwise non-normally distributed. By integrating a powerful approach known as average marginal effects within mediation analysis—termed Marginal Mediation Analysis (MMA)—the issues regarding categorical mediators and/or outcomes are, in large part, resolved. This new approach allows the estimation of the indirect effects (those effects of the predictor that affect the outcome through the mediator) that are interpreted in the same way …

Effect Of High Intensity Ultrasound On The Crystallization Behavior Of Interesterified Fats, Jeta Vijay Kadamne

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The process of partial hydrogenation produces trans fats and the fats that undergo this process are called partially hydrogenated fats (PHF). Clinical studies have shown a strong association between PHF and coronary heart diseases. In 2015 The U.S. Food and Drug Administration removed the Generally recognized as safe or "GRAS" status of PHF. These fats were used in confectionary, margarines, shortenings, doughnuts, cookies, cakes, etc. The PHF serve a function in food by providing a higher shelf life and a desired harder structure due to their higher melting point. Hence, the food industry is currently looking for PHF alternatives which …

Historical Biogeography And Natural History Of Nocturnal Wasps In The Southwestern Deserts With Special Emphasis On The Genus Chyphotes (Hymenoptera: Chyphotidae), Emily A. Sadler

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Deserts are interesting places due to the large number of plants and animals that live there. Nocturnal wasps are extremely abundant in deserts, but they are difficult to identify and their life cycles are not well known especially the families of Chyphotidae, Tiphiidae (Brachycistidinae), and Mutillidae (velvet ants). In this dissertation, I determine how to correctly identify a particularly difficult group of species that all have black heads from the family Chyphotidae. This is important because these species make up a large proportion of specimens collected. Also, I expanded our knowledge on the distribution of the species of these three …

Elucidating Molecular Interactions Of Shigella Type Three Secretion System Components Critical For Pathogenesis, R. Alan Burgess

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Shigella are pathogenic bacteria which commonly infect human hosts through the fecal-oral route. As the causative agent of shigellosis, a disease characterized by severe diarrhea, nausea, and vomiting, Shigella are responsible for an estimated 90 million infections and 100,000 deaths each year. With the emergence of antibiotic resistant strains of Shigella, the need for alternative treatments methods has become critical to fighting outbreaks of shigellosis and drug resistant strains. One such method is to target the infection system of the bacteria, called the type three secretion system (T3SS). The T3SS includes a complex needle and syringe-like apparatus that is …

Utilizing A School-Based Treatment To Address Socially Anxious Elementary School Students, Mckell Nelson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Despite the availability of promising clinic-based programs, youth exhibiting socially anxious behaviors rarely receive the treatment they may need. Those that do get treatment, often do so in the school setting. Thus, the demand for effective interventions to address those needs in the school-setting is growing. The present study investigated the effects of a modified CBT intervention, delivered in the school setting, on positive peer interactions and self-rating social anxiety. Results showed that the treatment package provided an increase in positive peer interactions across all four participants, as well as a decrease in self-rated anxiety behaviors.

Integrated Systems Modeling To Improve Watershed Habitat Management And Decision Making, Ayman H. Alafifi

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Existing river management tools prioritize human uses and provide for ecosystem water needs as minimum instream flow requirements. Management efforts to provide water for multiple human and ecological needs can be improved by tools that recommend when, where, and how to allocate water between competing users across a river basin. This dissertation presents a set of tools in three studies to help managers make decisions on the allocation of water and money to improve habitat quality and area. The first study develops a new metric to measure habitat quality and area for priority river, riparian, and wetland species. The second …

A Qualitative Analysis Exploring The Development Of Problematic Sexual Behaviors In Adolescent Males With Developmental Disabilities, Maria J. Watters

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Adolescents with developmental disabilities (DD) experience regular physical and sexual development. Some adolescents with developmental disabilities engage in problematic sexual behaviors (PSB). In order to be able to address the needs of this population in terms of prevention of PSB, and provision of effective treatment after PSB has begun, their experience must be understood and contributing factors identified. It is with this in mind that this study was designed, with the purpose being the exploration of the experiences of adolescents with DD who have engaged in sexually problematic behaviors, including compulsive or addictive patterns of behavior, and to identify the …