Digital Commons Network^™

Novel Techniques For Rapid Cardiac Perfusion Magnetic Resonance Imaging With Whole Heart Coverage, Haonan Wang

Theses and Dissertations

Magnetic Resonance Imaging (MRI) is a non-invasive medical imaging method that is used in the diagnosis of many common diseases. Compared to other medical imaging modalities, MRI has the ability to provide high-resolution 2D and 3D images in arbitrary orientations, without the use of potentially damaging ionizing radiation. Myocardial perfusion MRI is a promising non- invasive clinical way to detect cardiac disease. It can also provide quantitative analysis for blood flow within the heart. However, MRI requires longer scan times to acquire images at comparable resolutions to some other imaging modalities. Increasing image resolution, both spatially and temporally, is very …

Associations Between Physical And Sedentary Activity Regularity And Sleep In Preschoolers And Kindergartners, Kara Mcrae Duraccio

Theses and Dissertations

Short sleep duration in childhood has been associated with an increased risk of overweight and obesity. Research suggests that physical activity might mediate this association; however, studies examining associations between physical activity and sleep in young children have reported equivocal findings. A possible explanation for these inconsistencies is that past studies have looked at total physical activity counts rather than examining physical activity regularity. We aim to explore the relationship of regular physical activity, sedentary behavior, and sleep in preschoolers and kindergartners. 131 children (ages 4-6) were included in this study. Each child wore a waist-worn accelerometer for three days …

Reconstructing Prehistoric Human/Plant Relationships At Casas Grandes, Chihuahua, Mexico Through A Microfossil Analysis Of Dental Calculus, Daniel James King

Theses and Dissertations

As part of a multinational project and with the help of other professionals, I gathered and analyzed 110 samples of dental calculus (fossilized plaque) from human remains discovered at Paquimé and the Convento site in the Casas Grandes River valley to identify various microfossils still present in the silica matrix. Once identified, I used the results to reconstruct human/plant relationships present during the Viejo (700-1250 CE) and Medio (1250-1450 CE) periods in and around Paquimé. My data suggest that maize was used throughout both time periods, supplemented by wild plants, and possible marine resources. Further, evidence for cultural food modification …

Competition Dynamics Within Communities Of Desert Wildlife At Water Sources, Lucas Keith Hall

Theses and Dissertations

Water is a vital resource for species inhabiting arid and semi-arid regions and can shape the biotic communities that we observe. Because water is considered a limiting resource for many species in desert environments, there is the potential for competitive interactions between species to occur at or around water sources. For this dissertation I tested hypotheses related to resource competition among different species of wildlife in the Great Basin and Mojave Deserts of western Utah. Chapter one evaluated the influence of feral horses (Equus caballus) on patterns of water use by communities of native birds and mammals. Chapter …

A Look At The Reliability Of An Early Childhood Expository Comprehension Measure, Alta Adamma Mcdonald

Theses and Dissertations

Although the implementation of the Common Core State Standards has included more informational texts in early grades to emphasize reading to gain knowledge (Green, 2012; Roskos & Neuman, 2014), the lack of available expository assessments leaves teachers unsure of what students need to know in order to be successful comprehenders of these texts (Hall, Markham, & Culatta, 2005; Harding, 2014). Moreover, there are very few early expository assessments available which makes it difficult for teachers to monitor young children's expository text knowledge and skills and then adjust their instruction to meet children's unique needs. The EECA R-2 is an early …

That's Disgusting: The Role Of Disgust In Nonprofit Marketing Campaigns, Tyler N. King

Theses and Dissertations

Nonprofit organizations face a unique challenge in communicating their messages in a marketing saturated world. The author of this research studied how nonprofit organizations used fear, disgust and empathy in their marketing campaigns to see if the use of these emotions would have an effect on six different factors. The results of this study showed how the use of distress can be used to amplify the feelings people have when they see images that contain both fear and disgust.

The Archon(S) Of Wildfell Hall: Memory And The Frame Narrative In Anne Brontë’S The Tenant Of Wildfell Hall, Alyson June Fullmer

Theses and Dissertations

In the first chapter of Anne Brontë’s The Tenant of Wildfell Hall, Gilbert Markham invites his reader to join him as he attempts to recall the past. Because Gilbert uses the journal of another to supplement his own memories, the novel's frame narrative structure becomes saturated with complex memory-based issues and problems. Thus, the complicated frame narrative provides fertile ground for exploring the novel through memory. In studying the frame narrative, scholars have typically devoted their criticism to Gilbert and how he shapes the frame. Few scholars afford the other primary narrator of the novel, Helen, any power in shaping …

Intermediary System Using Image Classification For Online Shopping, Yunan Liu

Theses and Dissertations

Online shopping is becoming a popular option for consumers. Currently, the most common product searching method that online shopping websites provide is keyword search. Most shoppers have to carefully select relevant keywords to search for their favorite products. Finding desired products using a query image for online shopping is currently not available. Image has been used for searching similar images in the database but they are usually not well annotated. Research effort has been devoted to developing reliable image-based retrieval systems for applications such as medical image retrieval and trademark search. None of these developments focuses on improving online shopping …

Discovering Self Together: An Art Teacher Exploring Her Role In Helping Adolescent Students On Their Journey To Self-Awareness, Rachel Jayne Romney

Theses and Dissertations

A case study of a junior high and high school art classroom that examines students' development of identity and self-awareness through reflective practice in a caring community. This project considers what the role of teaching is and how working through vulnerability to create caring relationships can inspire teachers and aid adolescent students, within an art curriculum, to discover their true selves.

Using Perceptually Grounded Semantic Models To Autonomously Convey Meaning Through Visual Art, Derrall L. Heath

Theses and Dissertations

Developing advanced semantic models is important in building computational systems that can not only understand language but also convey ideas and concepts to others. Semantic models can allow a creative image-producing-agent to autonomously produce artifacts that communicate an intended meaning. This notion of communicating meaning through art is often considered a necessary part of eliciting an aesthetic experience in the viewer and can thus enhance the (perceived) creativity of the agent. Computational creativity, a subfield of artificial intelligence, deals with designing computational systems and algorithms that either automatically create original and functional products, or that augment the ability of humans …

Influence Of Release Timing On Survival And Movements Of Translocated Mule Deer (Odocoileus Hemionus) In Utah, David C. Smedley

Theses and Dissertations

Translocation of wildlife has become common practice for wildlife managers charged with management of animals on increasingly modified landscapes. Translocation can be used to reduce population density in the source area, supplement existing populations, reestablish extirpated populations, and establish new populations. Mule deer (Odocoileus hemionus) are a species of great interest to the public in western North America. Although translocations have been used to manage mule deer, very little has been done to document the outcomes of this management practice. The purpose of this research was to evaluate movement, site fidelity, space use, and survival of translocated mule …

Thermal And Convective Loading Methods For Releasing Hydrophobic Therapeutics From Contact Lenses, Ryan Ruben Horne

Theses and Dissertations

This thesis investigates the feasibility of loading silicone hydrogel (SiHy) contact lenses with two different hydrophobic therapeutics, latanoprost and DMPC (1,2-dimyristoyl-sn-glycero-3-phosphocholine), for treatment of glaucoma and hyperemia respectively. The two methods of loading were 1) thermal loading in an aqueous medium and 2) convective loading in a solution of n-propanol. Dailies Total1® lenses prepared in this manner were tested for their loading and their release into artificial tears. Continuous release over 1-4 days at therapeutic levels is achievable from thermal loading of DMPC, convective loading of DMPC, and convective loading of latanoprost. The DMPC loading processes can be naturally integrated …

The Role Of The Transcriptional Antiterminator Rfah In Lipopolysaccharide Synthesis, Resistance To Antimicrobial Peptides, And Virulence Of Yersinia Pseudotuberculosis And Yersinia Pestis, Jared Michael Hoffman

Theses and Dissertations

RfaH is a unique bacterial protein that enhances transcription of a select group of long operons in many Gram-negative bacteria. Operons regulated by RfaH possess an upstream operon polarity suppressor sequence, which recruits the RfaH protein to the RNA polymerase during transcription of genes, most of which are involved in the synthesis of cell-surface features. These include synthesis of the lipopolysaccharide (LPS) core and O-antigen in Salmonella and Escherichia coli, as well as F-plasmid conjugation pilus and capsule in E. coli. LPS is an important virulence factor in many Gram-negative bacteria, and protects Y. pseudotuberculosis against host antimicrobial …

Why Kids Are 'Lovin' It': A Q Methodology Analysis Of The Appeal Of Mcdonald's, Erica Nelson Rivera

Theses and Dissertations

The dramatic rise in childhood obesity is a major concern nationwide. Unprecedented media exposure, drastically decreased time spent interacting as a family, and the consumption of calorie-dense foods are all heated topics of discussion with ties to weight gain. In this research, possible associations are examined between media, social groups and a favorite fast-food restaurant among children: McDonald's. Q methodology was used to analyze the various factors that draw children to McDonald's. With a theoretical background in social learning theory, this study had 29 children rank-order 30 photographs depicting elements of the McDonald's experience. Pictures included the most and least …

Nerve Regeneration Using Lysophosphatidylcholine And Nerve Growth Factor, Ryan Lavar Wood

Theses and Dissertations

Peripheral nerve damage affects hundreds of thousands of people every year. This study tested the effectiveness of using lysophosphatidylcholine (LPC) in combination with nerve growth factor (NGF) to increase the healing rate of damaged left sciatic nerves in female rats. The rats were randomly divided into eight groups: Sham, Right Sciatic, Crush, LPC, LPC-NGF, Crush- LPC, Crush-NGF, and Crush-LPC-NGF. The healing of the nerves was measured by monitoring gait, electrophysiological parameters (compound muscle action potential amplitudes and nerve conductance velocities) and morphological parameters (total fascicular area, total myelinated fiber counts, fiber densities, fiber diameters, and g-ratio). Gait and electrophysiological parameters …

Hope For Susan: Moral Imagination In The Chronicles Of Narnia, Emily Rose Kempton

Theses and Dissertations

The fate of Susan Pevensie has been one of the most controversial and interesting topics of debate about The Chronicles of Narnia since readers realized that she was no longer a friend of Narnia. Many critics have condemned C. S. Lewis for being sexist, thus making the stereotypically feminine Susan with her love of parties, nylons, and lipstick ineligible for salvation. This thesis proposes to look at Susan's choices and fate from the perspective of moral imagination. It argues that Lewis did not bar Susan from heaven to belittle femininity, but rather to comment on the consequences of choice, belief, …

Human Herpesvirus 6a Infection And Immunopathogenesis In Humanized Rag2-/-Γc-/- Mice And Relevance To Hiv/Aids And Autoimmunity, Anne Tanner

Theses and Dissertations

Human herpesvirus 6A (HHV-6A) has yet to be definitively linked to a specific disease. This is due in part to the ubiquitous nature of the virus. Humanized Rag2^-/-γc-/- (Rag-hu) mice were tested to determine if these were a suitable animal model to study the virus. Both cell-free and cell-associated virus was used for infection and both were found to be efficient at infecting the mice. Viral DNA was found in the plasma and cellular blood fractions, bone marrow, lymph node, and thymus, indicating successful infection and propagation of the virus in vivo. The CD3+CD4- population was depleted, while the …

Uncanny Bodies In Sacred Settings: Creating The Divine In Rodney Smith's Photography, Rebecca Leigh Langham

Theses and Dissertations

The photographer Rodney Smith shows us images of real things and people, but real things and people that aren’t positioned in real ways and places people would actually be. Instead, he uses something very familiar to each of us–the human body–and consistently puts it in very unfamiliar situations. By using something so intimately familiar to each of us as the body in weird ways, he automatically jars our own experienced sensations. And this jarring of familiar sensations, this defamiliarization of something so familiar to us, is what typically results in what literary critics term the feeling of the uncanny. What …

Frémont Island: Great Salt Lake, Utah, Stanley L. Welsh, Dale Gardner, Steve Durtschi

Books by Faculty of the Monte L. Bean Life Science Museum

Abstract

This account is based mainly on two historical records of pioneering attempts that reached Frémont Island, i.e., Report of the Exploring Expeditions to the Rocky Mountains in the year 1842, and to Oregon and Northern California in the years 1843-‘44, by Brevet Captain J. C. Frémont of the Topographical Engineers Under the orders of Co. J. J. Abert, Chief of the Topographical Bureau. Printed by order of the Senate of the United States. Washington: Gales and Seaton Printers, 1845, and especially pages 151–159 of that report, as presented in narrative form in pages 43–47 of the John Charles …

Effects Of Abscisic Acid (Aba) On Germination Rate Of Three Rangeland Species, Turmandakh Badrakh

Theses and Dissertations

Seeds sown in the fall to restore sagebrush (Artemisia spp.) steppe plant communities could experience high mortality when they germinate and seedlings freeze during the winter. Delaying germination until the risk of frost is past could increase seedling survival. We evaluated the use of abscisic acid (ABA) to delay germination of Elymus elymoides, Pseudoroegneria spicata, and Linum perenne. The following treatments were applied: uncoated seed, seed coated with ABA at 2.2, 4.4, 8.8, 13.2, and 17.6 g of active ingredient kg-1 of seed, and seed coated with no ABA. The influence of seed treatments on germination were tested at five …

Role For Reactive Oxygen Species In Methamphetamine Modulation Of Dopamine Release In The Striatum, David Matthew Hedges

Theses and Dissertations

Methamphetamine (METH) is a highly addictive substance that is highly prevalent in today’s society, with over 1 in 20 adults over 26 having taken it at least once. While it is known that METH, a common psychostimulant, acts on both the mesolimbic dopamine (DA) and nigrostriatal DA systems by affecting proteins involved in DA reuptake and vesicular packaging, the specific mechanism of what is known as METH neurotoxicity remains obscure, but has been shown to involve oxidative stress. Studies have shown that reactive oxygen species act on the same proteins that METH affects. Oxidative species have also been known to …

"An Hungry Man Dreameth": Transcendental Film Theory And Stylistic Trends In Recent Institutional Films Of The Lds Church, Mark T. Lewis

Theses and Dissertations

To the religiously minded, few things carry greater importance than a connection to the divine. For centuries, the literature of prophets and the work of gifted artists have served to create a liminal space where man and Maker can meet. The advent of cinema and the creation of the Internet pose unique questions for the artist seeking to lead an audience toward an encounter with God. In a modern world where discretionary time is dominated by on-demand video streaming, the value of understanding cinema and its myriad potential is particularly relevant. As a religious organization, The Church of Jesus Christ …

Placental ‘€˜Omics’€™ Study To Understand The Pathogenesis Of Preeclampsia, Komal Kedia

Theses and Dissertations

Preeclampsia (PE) is a potentially fatal complication of pregnancy characterized by an increase in blood pressure (>140/90 mmHg) and proteinuria (>300 mg/24 hrs), often accompanied by edema. Symptoms of PE start after 20 weeks of gestation. If PE remains untreated, it can lead to eclampsia, grand-mal seizures responsible for most fatalities. PE is believed to affect 2-10% of pregnancies worldwide, and claims the lives of over 75,000 mothers and 500,000 newborns yearly. No therapeutic agents have been developed to prevent or cure PE. Part of the reason for this is the absence of a complete understanding of the …

The Path To Understanding Salt Tolerance: Global Profiling Of Genes Using Transcriptomics Of The Halophyte Suaeda Fruticosa, Joann Diray Arce

Theses and Dissertations

Salinity is a major abiotic stress in plants that causes significant reductions in crop yield. The need for improvement of food production has driven research to understand factors underlying plant responses to salt and mechanisms of salt tolerance. The aim of improving tolerance in traditional crops has been initiated but most crops can only tolerate a limited amount of salt in their systems to survive and produce biomass. Studies of naturally occurring high salt-tolerant plants (halophytes) are now being promoted for economic interests such as food, fodder or ecological reasons. Suaeda fruticosa, a member of the family Chenopodiaceae, belongs …

Measuring Student Engagement In Technology-Mediated Learning Environments, Curtis R. Henrie

Theses and Dissertations

This is a multiple-article format dissertation that explores methods for measuring student engagement in technology-mediated learning experiences. Student engagement is the committed, focused, and energetic involvement of students in learning. Student engagement is correlated with academic performance, student satisfaction, and persistence in learning, making it a valuable predictor of important learning outcomes. In order to identify which students need help or to evaluate how well an instructional interaction promotes student engagement, we need effective measures of student engagement. These measures should be scalable, cost effective, and minimally disruptive to learning. This dissertation examines different approaches to measure student engagement in …

Roadway Safety Analysis Methodology, Samuel Thomas Mineer

Theses and Dissertations

The Utah Department of Transportation (UDOT) Traffic and Safety Division continues to advance the safety of the state roadway network through network screening and decision making tools. In an effort to aid UDOT in meeting this goal, the Department of Civil and Environmental Engineering at Brigham Young University (BYU) has worked with the Statistics Department in developing analysis tools for highway safety, specifically the Utah Crash Prediction Model (UCPM) and the Utah Crash Severity Model (UCSM). Additional tools and methodologies, such as the "Hot Spot Identification and Analysis," have been created to summarize the roadway characteristics, crash data, and possible …

Implementation Of Bim In The Municipal Plan Review Process, Liz Shantalle Ricardo Belliard

Theses and Dissertations

Obtaining a building permit is an important step for any construction project. Whether it is for a new construction or a remodel job, the process involves a plan review performed by building officials. The purpose of this research was to explore ways in which Building Information Modeling (BIM) could be used to aid code officials during the plan review process. The objectives of the study were to determine if the level of detail in BIM was complete enough to allow a plan review to be perform accurately, to identify the extent to which architects are comfortable with using their models …

Woman With Birds, Vanessa Palmer

AWE (A Woman’s Experience)

artwork

(W)Hole

AWE (A Woman’s Experience)

Memoir experience of an abuse survivor.

Real, Vanessa Palmer

AWE (A Woman’s Experience)

artwork