Digital Commons Network^™

Pooling Of Variances: The Skeleton In The Mixed Model Closet?, Philip M. Dixon

Conference on Applied Statistics in Agriculture and Natural Resources

I explore three related issues concerning pooling of error variances: when is it appropriate (or not) to pool, how best to evaluate equality of variances, and whether there is a cost to never pooling. I focus on pooling decisions in a combined analysis of a multi-site experiment. A-priori, sites should have different error variances. My primary question is whether an analysis that ignores unequal variances is wrong.

I find that ignoring heteroscedasticity between sites maintains, or provides slightly conservative, tests of average treatment effects and treatment-by-site interactions. Models with site-specific variances do provide more powerful tests when variances are different. …

Characterization Of An N-Terminal Non-Core Domain Of Rag1 Gene Disrupted Syrian Hamster Model Generated By Crispr Cas9, Jinxin Miao, Baoling Ying, Rong Li, Ann E. Tollefson, Jacqueline F. Spencer, William S.M. Wold, Seok-Hwan Song, Il-Keun Kong, Karoly Toth, Yaohe Wang, Zhongde Wang

Animal, Dairy, and Veterinary Science Faculty Publications

The accumulating evidence demonstrates that Syrian hamsters have advantages as models for various diseases. To develop a Syrian hamster (Mesocricetus auratus) model of human immunodeficiency caused by RAG1 gene mutations, we employed the CRISPR/Cas9 system and introduced an 86-nucleotide frameshift deletion in the hamster RAG1 gene encoding part of the N-terminal non-core domain of RAG1. Histological and immunohistochemical analyses demonstrated that these hamsters (referred herein as RAG1-86nt hamsters) had atrophic spleen and thymus, and developed significantly less white pulp and were almost completely devoid of splenic lymphoid follicles. The RAG1-nt86 hamsters had barely detectable CD3+ and CD4+ T cells. The …

Woodland Caribou Habitat Selection Patterns In Relation To Predation Risk And Forage Abundance Depend On Reproductive State, Rebecca Viejou, Tal Avgar, Glen S. Brown, Brent R. Patterson, Doug E. B. Reid, Arthur R. Rodgers, Jennifer Shuter, Ian D. Thompson, John M. Fryxell

Wildland Resources Faculty Publications

The ideal free distribution assumes that animals select habitats that are beneficial to their fitness. When the needs of dependent offspring differ from those of the parent, ideal habitat selection patterns could vary with the presence or absence of offspring. We test whether habitat selection depends on reproductive state due to top‐down or bottom‐up influences on the fitness of woodland caribou (Rangifer tarandus caribou), a threatened, wide‐ranging herbivore. We combined established methods of fitting resource and step selection functions derived from locations of collared animals in Ontario with newer techniques, including identifying calf status from video collar footage and seasonal …

A Review Of Impact Testing Used For The Diagnosis Of Concussion And The Influence Of Language Of Test Administration, Carley Bishop

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

The Immediate Post-Concussion Assessment and Cognitive Test (ImPACT) battery is a widely used tool for the diagnosis and treatment of concussions. The purpose of this review was to evaluate studies that account for patient language and language of test administration when conducting ImPACT. A total of 36 articles were reviewed. The 36 articles reviewed accounted for English speaking populations and five of the articles accounted for populations representing different languages. Five of the studies were test-retest reliability studies. The results indicated that ImPACT has acceptable test-retest reliability when used in English to monolingual English-speaking participants. However, the results demonstrated ImPACT …

An Analysis Of Murals Painted By Students At Intermountain Indian School In Brigham City, Utah, Carlos Junior Guadarrama

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

My plan B thesis argues that Intermountain School in Brigham City, Utah was a progressive development, especially when placed within the context of other Native American boarding schools. I argue my point by conducting a close examination and analysis of several murals painted by prominent indigenous artist Allan Houser and students at the school as well as several other forms of art from Intermountain. In the first chapter of my thesis, I present evidence that demonstrates how damaging Native Boarding schools were for generations of students. I then present evidence which showcases how certain changes paved the way for Intermountain …

Design And Motion Media For Modern Theatre, Patrick W. Mathis

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

This report describes the work completed for three plays: Dogfight, Next to Normal, and Three Sisters.

When It Comes To The Environment, Is Education Morally Obligatory?, Rachel Robinson-Greene

Languages, Philosophy, and Communication Studies Faculty Publications

In April of this year, scientists from the Alfred Wegener Helmholtz Center for Polar and Marine Research reported finding record amounts of plastic particles in the Arctic sea. Ice core samples were taken from five regions in the area. Up to 12,000 pieces of micro-plastic particles per liter of ice were found in the samples. Scientists believe that much of the plastic, cigarettes butts, and other debris came from the Great Pacific Garbage Patch, a mass of floating waste occupying 600,000 square miles between Hawaii and California.

Utah State University Commencement, 2018 – Main Campus, Utah State University

Commencement Programs

131st Annual Commencement of Utah State University.

Tremblings, May 2018, Western Aspen Alliance

Tremblings

Wyoming's High Desert: Aspen habitat presents challenges

Kevin Spence

The high elevation desert of southwest Wyoming occurs between 6,040 ft. and 9,550 ft. Isolated “high points” in the area are dryland oases supporting high aquatic and terrestrial wildlife species richness, as vegetative diversity provides essential life stage habitat needs for numerous species. Although aspen makes up the smallest percentage of all vegetation types on this landscape, I consider aspen stands and their associate understories the most ecologically important in this ecosystem. Just a few benefits these aspen stands provide include: solid dam building material for beaver pond complexes providing riparian …

Impact Of Basal Diet On Obesity Phenotype Of Recipient Mice Following Fecal Microbiome Transfer From Obese Or Lean Human Donors. Appendix D. Microbiome Sequencing Data, Daphne Rodriguez, Abby D. Benninghoff, Korry Hintze

Browse all Datasets

The complete data set generated by 16S rRNA sequencing of all fecal samples analyzed is provided as a digital data .biom file accessible.

Motor Affordance For Grasping A Safety Handle, Doug W. Mcdannald

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

Observation of objects in our environment can potentiate movement, a fact reflected by increased activity in motor cortical networks when participants simply view a graspable object. This suggests that specific areas in the motor cortex play an important role in processing visual information to rapidly determine an appropriate action. The present study was conducted to test if visual access to a wall-mounted safety handle results in activation of motor cortical networks. We hypothesized that the hand area of the primary motor cortex would be facilitated shortly after visual access to a safety handle versus when no handle was visible. To …

Judgments Of Intelligence And Likability For Young Adult Female Speakers Of American English: The Influence Of Vocal Fry And The Surrounding Acoustic-Prosodic Context, Michelle Parker

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

Objective: There is little consensus about how the use of the voice quality feature, vocal fry, in the speech of college-aged American women influences listener judgements of the speaker. This study investigates how vocal fry influences the judgement of speaker intelligence and likeability in this population, while taking into account the surrounding acoustic-prosodic context, specifically speech rate and voice pitch.

Method: Speech samples were obtained from eight American English speaking females who presented with different combinations of voice pitch (low or high), speech rate (slow or fast), and vocal fry (presence or absence). Listener judgements from 463 adults (262 males; …

Characterization Of Lactose Fatty Acid Esters For Their Microbial Growth Inhibitory Activity And Emulsification Properties, Seung-Min Lee

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Sugar esters, substances made from bonding fatty acid tails to a sugar head, can play a number of key roles in food systems from antimicrobial agents to emulsifiers. These unique and very useful properties result from their water-loving and water-avoiding ends. Lactose, a sugar found in milk, based esters are important, as they are environmentally friendly and inexpensive, however, they are not very well understood. I created four different types of lactose esters: lactose monooctanoate (LMO), lactose monodecanoate (LMD), lactose monolaurate (LML) and lactose monomyristate (LMM), and then compared them to each other to see which would be the best …

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 …

Archaeological Analysis Of Bison Remains From Wilde Cave, Idaho, Michelle A. Platt

Undergraduate Honors Capstone Projects

Wilde cave is a lava tube located in Southeast Idaho on BLM lands. Recent investigations recovered a skeletal collection represented at least nine bison, as well as several other taxa. After many hours in the archaeology lab at Utah State University, identification of the collection shows the most prominent carcass parts represent fore and hind limbs, while vertebrae and ribs were least common. Also present was limited evidence of butchery-burning and cut marks-and carnivore modification on the skeletal collection. Given these observations, density mediated attrition and utility indices were used to better understanding the patterns in the archaeological bison bone. …

Managing Dietary Protein In Cattle As A Means Of Reducing Ammonia Emissions To Improve Air Quality, Ashley Houston

Undergraduate Honors Capstone Projects

Particulate matter pollution has become a subject of great concern across the globe. Emissions data has revealed that the agricultural sector is making large contributions to particulate matter through ammonia emissions. Beef and dairy cattle are responsible for producing nearly 50% of annual ammonia emissions in the United States. These animals are often fed amounts of dietary protein that exceed recommendations, resulting in increased excretion of urea and ammonia. These compounds combine with nitrogen oxides in the atmosphere to form PM_2.5: particulate matter measuring less than 2.5 microns in diameter. Research has shown that through proper dietary management …

Impacts Of Hydroelectric Dams On Aquatic Macroinvertebrate Oviposition Strategies: The Role Of Desiccation, Jesse R. Fleri

Undergraduate Honors Capstone Projects

Previous studies quantifying the density, distribution and diversity of aquatic insects overwhelmingly focus on larval life stages. However, many aquatic insects exhibit selective oviposition behaviors, with a preference for emergent substrates along a river's edge. The practice of hydropeaking creates an artificial intertidal zone that is absent from natural rivers and to which freshwater organisms are not adapted. We hypothesized that this novel disturbance could reduce the availability and temporal persistence of oviposition habitats resulting in egg mortality. To test this hypothesis, we quantified the oviposition behavior of four aquatic insects using a hierarchical field survey of habitat availability and …

Talking Stories: An Analysis Of Haolewood's Attempts To Tell Hawai'i'S Stories Through Movie Trailers, Pono R. Suganuma

Undergraduate Honors Capstone Projects

This study investigated how Native Hawaiians and Hawai'i are represented by the media, specifically in movies and their accompanying trailers. Thirty movie trailers from movies released between 1939 and 2016 were analyzed. These movies represented the various movie genres of romantic comedy, thriller, war, animation, drama, historical, and more. The aim of the study was to compile evidence of various themes such as stereotyping, white-washing and language pronunciation within movie trailers in order to validate or extend conceptually the theoretical framework or theory about the lack of accurate representation of Native Hawaiians. This is a feasibility study that could help …

Evaluation Of Antiviral Agents In Two Mouse Models Of Rna Virus Infections, John Hyrum Mcclatchy

Undergraduate Honors Capstone Projects

The first model we are evaluating is human influenza virus in mice. Influenza virus is a negative sense RNA virus, which the CDC estimates causes between 9.2 million and 35.6 million illnesses each year in the United States.^[1] In the current influenza season, H3N2 viruses have been the predominant subclade of influenza A virus in circulation.^[2] Development of a mouse model for influenza H3N2 virus infection has been difficult. In these studies, we endeavored to mouse-adapt influenza A/Hong Kong/4801/2014 H3N2 virus by serial passaging in AG129 mice. This virus strain was chosen as it overlaps in serotype with …

The Role Of Trailing Behavior In Conspecific Mating In Thamnophis Elegans And Thamnophis Sirtalis, Eleanor Watson

Undergraduate Honors Capstone Projects

In many gartersnake species, successful mating depends on the ability of males to follow pheromone trails left by females. The populations we investigated (Thamnophis sirtalis and Thamnophis elegans, closely related sympatric species) overwinter together and simultaneously emerge. Although, mating occurs concurrently, there is no evidence of hybridization. Therefore, we sought to investigate the mechanisms that allow male snakes to differentiate between heterospecific and conspecific females to ensure mating success. Behavior studies were conducted by presenting male snakes with extracted scents of conspecific females, heterospecific females, and conspecific males. We measured male preference by number of investigatory tongue flicks …

Crowdsourcing Consciousness: You Think, Therefore I Am, Justin M. Campbell

Undergraduate Honors Capstone Projects

The challenge to understand consciousness is a centuries-old interdisciplinary research program. The search entails fundamental questions about our nature - the desire to understand who we are has been around for nearly as long as experience itself. It is also one of the most important questions we can ask; meaning itself is predicated on having some sort of conscious experiencer for whom something can matter. Given the magnitude and intractability of explaining the paradox of how consciousness can be at once the most obvious thing in the universe, and also the most inaccessible, the endeavor is a tremendous undertaking. Until …

Participate!, Michael Kettinger

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

Hands-on art projects that directly reference scientific information may be a good outreach tool to generate interest in Science, Technology, Engineering, and Mathematics.

The Successful Foreign Language Classroom: Affect, Empathy, And Engagement, Emily Mower

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

This portfolio is the culmination of the author’s work in the Master of Second Language Teaching program at Utah State University. Throughout this collection the author shares her personal views and experiences from teaching secondary and postsecondary beginning Spanish courses, supporting her claims with existing research. The portfolio consists of three sections: (1) teaching perspectives, (2) research perspectives, and (3) annotated bibliographies.

The objective of this work is to identify hindrances to the progress of foreign language teachers and learners, and best practices to stimulate their success. On the basis that language learning can promote cross-cultural understanding, these findings are …

Development Of A 4th-8th Grade Curriculum For Flying And Programming Mini Drones, Jordan Lynn Bartholomew, Russell Scott Mayo

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

This project was a joint effort by Jordan Bartholomew and Russell Mayo. The project consisted of three parts. Part one was the development of the lesson content led by Jordan Bartholomew. Part two was the production of a multimedia package that included lesson videos, animations and logos for the ROAV copter mini curriculum, led by Russell Mayo. Part three included a journal article to introduce the curriculum co-written by both Jordan and Russ. The curriculum was developed for hands-on experiential learning and includes a computational thinking component. The lesson videos were intended for self-instruction or in a classroom setting. The …

Constraints Of Haunted Heritage Tourism In Logan, Utah, Kylie Schroeder

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

It has become common in Salem, Savannah, New Orleans, Edinburg, or Gettysburg, to witness groups of people being led through the darkened streets as part of a ghost tour or haunted history walk. An altered form of commercialized legend tripping, these companies offer guided tours, feature spooky stories, and often showcase local history. However, the trend of haunted heritage tourism, especially in the form of ghost walks and haunted history tours, has spread beyond places with national or international reputations for hauntings and is now growing in small towns whose stories are rarely shared beyond the local populace.

This thesis …

Skill Builder: Assistive Technology For Developing Skill And Habits, Aaron Kay

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

The Skill Builder application is assistive technology for helping individuals build skills through reminders and self-reporting feedback. The application has been built to support Android and iOS devices and followed a user-centric design methodology. Skill Builder’s architecture and development processes are set forth using cross-platform development environments and a native software development kit for the three different versions of the application that were built. The strengths and weaknesses of each of the platforms are explored.

Several studies have been proposed for helping individuals with different needs learn the skills to cope with their challenges. Applications of Skill Builder include students …

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 …

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 …

Effect Of Silicon On Wheat Growth And Development In Drought And Salinity Stress, Spencer A. Tibbitts

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Silicon is a major component of most soils, and is found in significant concentration in plant tissue. Plants vary widely in the amount of silicon they take up, with some plants excluding it, and others using transporters to move the silicon from the soil into their roots. Early plant physiology studies were unable to determine conclusively whether silicon was essential to plant growth, but for some plants, most notably rice, it has proved to be important enough to justify fertilizing silicon deficient fields.

Researchers at the USU Crop Physiology Lab tested the effect of silicon on wheat growth and seed …