Digital Commons Network^™

Transient Thermal Modeling Of Bioprocessing Equipment, Cody M. Cummings

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Bioprocessing is leveraging cells to produce high value, lifesaving products. Precise environmental control is needed to maintain integrity of the bioprocessing production process. Temperature control requires both appropriate equipment choice and correct control parameter selection. To aid in the equipment selection process, enable better understanding of equipment capacity, and enable optimization of control parameters, a transient thermal model of both heat transfer characteristics and control systems was created in silico.

Social Change Engagement And Leadership Development Among College Students, Andrew Harris

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Young people are increasingly in the public view as agents of social change. As suggested in the Social Change Model of Leadership Development, those who develop the seven values of socially responsible leadership (consciousness of self, congruence, commitment, common purpose, collaboration, controversy with civility, and citizenship) are prepared to engage in the leadership process by creating positive social change. Findings from this study suggest that the socially responsible leadership value of citizenship was the value most consistently related to social change engagement. Additionally, social generativity, or the desire to leave a legacy for future generations, as well as participating in …

Teaching Appropriate Feedback Reception Skills Using Computer-Based Training, Seth G. Walker

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Feedback is a commonly used intervention to address performance issues in a number of settings. Most research on feedback has focused on manipulating parameters surrounding the delivery of feedback. However, the interaction between those delivering the feedback and a feedback recipient may also influence the impact of performance feedback. The current study investigated the efficacy of training individuals to receive feedback in an appropriate manner using a computer-based training format. Following computer-based training, participants exhibited increases in accuracy of appropriate feedback behaviors when compared to baseline. Participants also demonstrated slight increases in performance on primary job tasks. This study extends …

Universal Localizations Of Certain Noncommutative Rings, Tyler B. Bowles

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A common theme throughout algebra is the extension of arithmetic systems to ones over which new equations can be solved. For instance, someone who knows only positive numbers might think that there is no solution to x + 3 = 0, yet later learns x = -3 to be a feasible solution. Likewise, when faced with the equation 2x = 3, someone familiar only with integers may declare that there is no solution, but may later learn that x = 3/2 is a reasonable answer. Many eventually learn that the extension of real numbers to complex numbers unlocks solutions …

Development And Identification Of Metrics To Predict The Impact Of Dimension Reduction Techniques On Classical Machine Learning Algorithms For Still Highway Images, Wasim Akram Khan

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

We are witnessing an influx of data - images, texts, video, etc. Their high dimensionality and large volume make it challenging to apply machine learning to obtain actionable insight. This thesis explores several aspects pertaining to dimensional reduction: dimension reduction methods, metrics to measure distortion, image preprocessing, etc. Faster training and inference time on reduced data and smaller models which can be deployed on commodity hardware are a critical advantage of dimension reduction. For this study, classical machine learning methods were explored owing to their solid mathematical foundation and interpretability.

The dataset used is a time series of images from …

Orson Pratt And The Expansion Of The Doctrine And Covenants, Brian C. Passantino

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Church of Jesus Christ of Latter-day Saints is a faith that is distinguished by its religious texts. The nickname "Mormon," that has been applied to adherents of the faith, comes from the name of its most cherished canonical book, the Book of Mormon. Aside from the Bible and the Book of Mormon, Latter-day Saints accept two other books of scriptures – the Pearl of Great Price and the Doctrine and Covenants. These four books constitute the authorized scriptures of the faith, or as they refer to them, "the standard works."

My thesis focuses on the book entitled the Doctrine …

Study Of Levee Underseepage Through Abandoned Channels And Point Bars On Curved Levee Sections Using The Response Surface-Monte Carlo Method, Tomsen Reed

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The current procedures for calculated the probability of failure of levees (earthen structures designed to prevent flooding of important locations) all have their own unique limitations. Some methods are very simplistic, and either ignore or do not allow for inclusion of complex geometries. Other methods allow for complex geometry, but do not lend themselves to large quantities of analysis because of the amount of time it takes to create or modify a model. For these reasons, previous research performed by Lourdes Polanco and Dr. John Rice developed the preliminary stages of a new method called the Response Surface-Monte Carlo method. …

Anthropogenic Influences On Bacterial Assemblages In Stream Biofilms, Elizabeth M. Ogata

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Bacteria within biofilms are an essential component of stream ecosystems, influencing the movement of carbon (C), nitrogen (N), and phosphorus (P) in watersheds. To better understand the ecological effects of human activities on stream ecosystems, my research examined how nutrients and pharmaceuticals, common pollutants in streams worldwide, influence bacterial assemblages in stream biofilms. First, I tested how nutrients (N, P, iron) and pharmaceuticals (caffeine, diphenhydramine) influenced biofilm bacterial microbiomes (taxa present in at least 75% of samples of a contaminant treatment). Nutrients allowed taxa known for their ability to thrive in nutrient-rich environments to dominate microbiomes, pharmaceuticals supported a rich …

Machine Learning Enhanced Free-Space And Underwater Oam Optical Communications, Patrick L. Neary

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Communications, bandwidth, security, and hardware simplicity are principles of interest to society at large. Recent advances in optics and in understanding properties of light, such as orbital angular momentum (OAM), have provided new potential mediums for communication.

Machine learning has wound its way into a broad range of fascinating areas. An emerging field of research is the use of a unique property of lasers called orbital angular momentum (OAM). With the proper hardware, a laser can go from a Gaussian shaped distribution to a doughnut shaped pattern, where the radius can be changed. Multiple OAM patterns, or modes, can be …

Anti-State Criminal Violence As Civil Defense, Tyler S. Thomas

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Anti-state criminal violence is a puzzle. Criminal organizations should avoid violent interactions with the state, yet in several countries like Brazil, Mexico, and Colombia there has been widespread anti-state violence orchestrated by organized criminal groups for the past 25 years. Why?

Building on existing literature, I develop a theory with which to explain anti-state criminal violence. I argue that organized crime is more likely to commit anti-state violence when state enforcement agents commit a serious grievance against the local population with whom the criminals share a social identity. I develop this theory using the case of the Michoacán Family, later …

A Translational Investigation Of Reinforced Behavioral Variability: Implications For Promoting Behavioral Variability In Individuals With Autism Spectrum Disorder, Ann Galizio

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Behavioral variability is sometimes adaptive and can be maintained by the delivery of reinforcement. Individuals with autism spectrum disorder (ASD) often show restricted and repetitive behaviors. Therefore, interventions to promote behavioral variability in individuals with ASD are needed. The present line of research was designed to inform such interventions by investigating reinforced behavioral variability from basic, applied, and translational perspectives. Each of these laboratory studies involved participants making sequences of well-defined responses, which were compared to previous responses. Responses that meet a variability contingency (i.e., were sufficiently different from previous responses) produced rewards. Studies 1 and 2 were basic experiments, …

Improving Aquatic Habitat Representation In Utah Using Large Spatial Scale Environmental Datasets, Gregory C. Goodrum

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Rivers provide habitat for aquatic species, but widespread human water development degrades aquatic habitat, fragments stream networks, and threatens native fish populations. Habitat suitability models are commonly used to identify current instream habitat conditions, but are often species-specific, data-intensive, and rarely suitable to the large spatial scales required in conservation and water resources management. Thus, there is need to develop and validate habitat suitability models that provide ecologically-meaningful estimations of aquatic habitat, but are simple enough to apply at large geographic areas and flexible to incorporate different species. I tested the accuracy of 15 habitat suitability models estimating Bonneville Cutthroat …

Greening-Induced Runoff Loss In The Western United States, Xueyan Zhang

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study assessed how vegetation will influence long-term runoff trends across the western United States (western US) in the future. I used a land surface model with improved dynamic vegetation root processes to better quantify regional runoff trends across five regions (Upper and Lower Colorado, Great Basin, Pacific Northwest, and California). The model was driven by statistically downscaled and bias-corrected outputs from three global climate models under the Representative Concentration Pathway 4.5 and 8.5 scenarios. Vegetation greening dominated significant transpiration increases that contributed most to increasing evapotranspiration across the western US, especially during spring and summer. Consistent with these trends, …

Harmonic Delay Reduction, Jay E. Hinnenkamp

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Stimuli which, during the life of an organism, acquire the ability to increase the probability of behavior that they follow are called conditioned reinforcers. The concurrent-chains procedure has been used to study conditioned reinforcement for over 60 years. During this time several different models have been developed to explain how stimuli become conditioned reinforcers. The three experiments of this dissertation introduced a new quantitative model of conditioned reinforcement (DRT_H) and tested its predictions against four existing models. The results of Experiment 1 indicated that DRT_H improves upon the accuracy of its predecessor, delay reduction theory (Fantino, 1969), …

Load Forecasting Analysis Using Contextual Data And Integration With Microgrids Used For Off Grid Ev Charging Stations, Ashit Neema

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Electricity is an essential component of the smooth working of every sector. If a successful prediction of how much electricity will be required for say the next 24 hours or 48 hours can be made, it will not only help in efficiently planning the activities and operations but also help in minimizing the cost incurred. In this thesis the same is being attempted, first, a model is created that can predict the energy consumption of households using various tools available. To achieve this, historical data of the past 5 years that has been recorded in London has been used. Secondly, …

Massive Graviton Spectra In Supergravity, Kevin Dimmitt

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Development of a unified theory of physics would pave the way for new research and technology development for many years to come. Unfortunately, the two best current theories explaining nature, the Standard Model of particle physics and general relativity, do not seem to be compatible, requiring the development of more complicated models which contains both of these at their respective limits. Supergravities are one set of theories which may, at least in part, provide hints as to how it may be possible to unify physics into a single model.

This research project follows from a line of investigation which the …

Ecoacoustic Methods For Multi-Taxa Animal Surveys In The Amazon, Leandro A. Do Nascimento

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Tropical regions host most of the biodiversity found on Earth, but these species-rich areas are constantly threatened by human development and other disturbances that put this diversity of life forms at risk. To avoid extirpations of animal and plant species, scientists and managers rely on accurate monitoring techniques to retrieve information about population trends. This task is not easy, especially in the tropics, where there is often a lack of personnel to conduct surveys, a lack of funding, and the areas are so extensive that many countries need to be involved in monitoring (e.g., Amazon biome). For this reason, scientists …

What Is The Storage Effect, Why Should It Occur In Cancers, And How Can It Inform Cancer Therapy?, Anna K. Miller, Joel S. Brown, David Basanta, Nancy Huntly

Ecology Center Publications

Intratumor heterogeneity is a feature of cancer that is associated with progression, treatment resistance, and recurrence. However, the mechanisms that allow diverse cancer cell lineages to coexist remain poorly understood. The storage effect is a coexistence mechanism that has been proposed to explain the diversity of a variety of ecological communities, including coral reef fish, plankton, and desert annual plants. Three ingredients are required for there to be a storage effect: (1) temporal variability in the environment, (2) buffered population growth, and (3) species-specific environmental responses. In this article, we argue that these conditions are observed in cancers and that …

Influence Of Edge Effects On Laser-Induced Surface Displacement Of Opaque Materials By Photothermal Interferometry, G. A. S. Flizikowski, B. Anghinoni, J. H. Rohling, M. P. Belançon, R. S. Mendes, M. L. Baesso, L. C. Malacarne, T. Požar, Stephen E. Bialkowski, N. G. C. Astrath

Chemistry and Biochemistry Faculty Publications

We demonstrate the influence of edge effects on the photothermal-induced phase shift measured by a homodyne quadrature laser interferometer and compare the experiments with rigorous theoretical descriptions of thermoelastic surface displacement of metals. The finite geometry of the samples is crucial in determining how the temperature is distributed across the material and how this affects the interferometer phase shift measurements. The optical path change due to the surface thermoelastic deformation and thermal lens in the surrounding air is decoded from the interferometric signal using analytical and numerical tools. The boundary/edge effects are found to be relevant to properly describe the …

Under Discussion: Free Speech, Cancel Culture, And Compassion, Rachel Robinson-Greene

Languages, Philosophy, and Communication Studies Faculty Publications

In July, 2020, Harper’s Magazine published a letter signed by 153 prominent authors and thinkers. Signatories included figures such as Noam Chomsky, Gloria Steinem, and J.K. Rowling. Their main contention was that an “illiberal left” has emerged in recent political discourse — a left that allows no room for divergent points of view and that deals with “wrongdoers” swiftly and mercilessly.

Genomic Insights Into Speciation History And Local Adaptation Of An Alpine Aspen In The Qinghai–Tibet Plateau And Adjacent Highlands, Jia-Lang Li, Lin-Ling Zhong, Jing Wang, Tao Ma, Kang-Shan Mao, Lei Zhang

Aspen Bibliography

Natural selection serves as an important agent to drive and maintain interspecific divergence. Populus rotundifolia Griff. is an alpine aspen species that mainly occurs in the Qinghai–Tibet Plateau (QTP) and adjacent highlands, whereas its sister species, P. davidiana Dode, is distributed across southwest and central to northeast China in much lower altitude regions. In this study, we collected genome resequencing data of 53 P. rotundifolia and 42 P. davidiana individuals across their natural distribution regions. Our population genomic data suggest that the two species are well delimitated in the allopatric regions, but with hybrid zones in their adjacent region in …

Aspen Next Generation: Conversations From Southern Colorado And Northern New Mexico, Dan Binkley, Bill Romme

Aspen Bibliography

Aspen trees and forests are especially important in the Rocky Mountains. Aspens add beauty to landscapes, foster high diversity and productivity of understory plants, provide for the habitat needs of many species of animals, and moderate fire behavior. There is a perception that aspen trees and stands are not regenerating well in southern Colorado and northern New Mexico; cohorts of trees younger than a few decades are scarce, at least in some areas. The next generation of aspen in the southern Rockies will be influenced by land use decisions, including harvesting, fire policy and management, and browsing by livestock and …

Nitrogen Fertilizer Guide For First-Year Small Grains Following Alfalfa, Matt Yost, Collin Pound, Earl Creech, Grant Cardon, Jody Gale, Michael Pace, Boyd Kitchen, Steve Price, Kevin Heaton, Mark Nelson, Trent Wilde, Katie Russell

All Current Publications

Nitrogen (N) fertilizer is one of the most expensive crop inputs. It is an essential nutrient for most crops and often increases yield more than any other nutrient. Small grains are no exception. Alfalfa is the dominant crop in Utah in terms of area and gross sales, and as a nitrogen-fixing legume, it does not require nitrogen fertilizer. When terminated, alfalfa usually leaves a lot of nitrogen in the soil for subsequent crops. The amount of nitrogen that it supplies to following crops has been termed the “alfalfa N credit.” In many cases, this credit can be up to 300 …

Large-Diameter Trees Dominate Snag And Surface Biomass Following Reintroduced Fire, James A. Lutz, Soren Struckman, Tucker J. Furniss, C. Alina Cansler, Sara J. Germain, Larissa L. Yocom Kent, Darren Mcavoy, Crystal A. Kolden, Alistair M. S. Smith, Mark E. Swanson, Andrew J. Larson

Wildland Resources Faculty Publications

The reintroduction of fire to landscapes where it was once common is considered a priority to restore historical forest dynamics, including reducing tree density and decreasing levels of woody biomass on the forest floor. However, reintroducing fire causes tree mortality that can have unintended ecological outcomes related to woody biomass, with potential impacts to fuel accumulation, carbon sequestration, subsequent fire severity, and forest management. In this study, we examine the interplay between fire and carbon dynamics by asking how reintroduced fire impacts fuel accumulation, carbon sequestration, and subsequent fire severity potential. Beginning pre-fire, and continuing 6 years post-fire, we tracked …

Effect Of Choline Forms And Gut Microbiota Composition On Trimethylamine-N-Oxide Response In Healthy Men, Clara E. Cho, Niklas D. J. Aardema, Madison L. Bunnell, Deanna P. Larson, Sheryl Aguilar, Janet R. Bergeson, Olga V. Malysheva, Marie A. Caudill, Machael Lefevre

Nutrition, Dietetics, and Food Sciences Faculty Publications

Background: Trimethylamine-N-oxide (TMAO), a choline-derived gut microbiota-dependent metabolite, is a newly recognized risk marker for cardiovascular disease. We sought to determine: (1) TMAO response to meals containing free versus lipid-soluble choline and (2) effects of gut microbiome on TMAO response. Methods: In a randomized, controlled, double-blinded, crossover study, healthy men (n = 37) were provided meals containing 600 mg choline either as choline bitartrate or phosphatidylcholine, or no choline control. Results: Choline bitartrate yielded three-times greater plasma TMAO AUC (p = 0.01) and 2.5-times greater urinary TMAO change from baseline (p = 0.01) compared to no choline and phosphatidylcholine. Gut …

Profiting From Protecting Small Business Borrowers: Take That To The Bank!, Jerome D. Williams, Sterling A. Bone, Glenn L. Christensen, Alexandra Tebbs

Marketing and Strategy Faculty Publications

While small businesses represent a significant portion of the economy, there is mounting evidence that the playing field is not level for these firms in access to capital. Based on 10 years of matched-paired mystery shopping tests in banks to investigate bank lending practices and customer experience, the results demonstrate that in almost every instance, minorities were treated more poorly than their White counterparts. However, the authors acknowledge the controversy surrounding this issue, as some question the need for government action to push banks in this direction. Before offering evidence of the impact race can have on the treatment of …

Limited Importance Of Primary Production In The Deep Chlorophyll Layer For Macro-Zooplankton In An Oligotrophic Karst Lake: A Whole-Lake 15N Experiment, Wayne A. Wurtsbaugh, María Rosa Miracle, Antonio Camacho, Javier Armengol, Eduardo Vicente

Watershed Sciences Faculty Publications

Deep-chlorophyll layers (DCL) in oligotrophic lakes contribute significantly to primary productivity, but the importance of this production for the rest of the food web and for other strata is unknown. In Laguna El Tejo, a sheltered 1.7-ha Spanish karst lake, chlorophyll levels were < 2 μg/L in the epilimnion but reached 10 μg/L in the metalimnion and upper hypolimnion where cyanobacterial picoplankton dominated. Particulate nitrogen levels were 2-14 times higher in the metalimnion than in the epilimnion and 42 % of the primary productivity occurred in the deeper strata where the DCL was located. To address the trophic importance of the high biomass and production in the deep chlorophyll layer, we injected ¹⁵NH₄⁺ and rhodamine into a 0.5-m strata (15-16 m) in the metalimnion of the lake. The ¹⁵NH₄⁺ taken up by the nitrogen-limited phytoplankton allowed us to measure the importance of biologically mediated transport whereas the rhodamine traced physical eddy diffusion. After 28 days 55 % of the ¹⁵N could be …

Comparison Of Accelerated Solvent Extraction (Ase) And Energized Dispersive Guided Extraction (Edge) For The Analysis Of Pesticides In Leaves, Ashlie D. Kinross, Kimberly J. Hageman, William J. Doucette, Alexandria L. Foster

Chemistry and Biochemistry Faculty Publications

Various techniques have been evaluated for the extraction and cleanup of pesticides from environmental samples. In this work, a Selective Pressurized Liquid Extraction (SPLE) method for pesticides was developed using a Thermo Fisher Scientific Accelerated Solvent Extraction (ASE) system. This instrument was compared to the newly introduced (2017) extraction instrument, the Energized Dispersive Guided Extraction (EDGE) system, which combines Pressurized Liquid Extraction (PLE) and dispersive Solid Phase Extraction (dSPE). We first optimized the SPLE method using the ASE instrument for pesticide extraction from alfalfa leaves using layers of Florisil and graphitized carbon black (GCB) downstream of the leaf homogenate in …

A Systematic Review Of Academic Discourse Interventions For School-Aged Children With Language-Related Learning Disabilities, Amy K. Peterson, Carly B. Fox, Megan Israelsen

Communicative Disorders and Deaf Education Student Research

Purpose: This systematic review synthesized a set of peer-reviewed studies published between 1985 and 2019 and addressed the effectiveness of existing narrative and expository discourse interventions for late elementary and middle school-aged students with language-related learning disabilities.

Method: A methodical search of the literature for interventions targeting expository or narrative discourse structure for students ages 9-14 with group experimental designs identified 33 studies, seven of which met specific criteria to be included in this review.

Results: An 8-point critical appraisal scale was applied to analyze the quality of the study design and effect sizes were calculated for six of the …

Stimulus Complexity And Chunk Tightness Interact To Impede Perceptual Restructuring During Problem Solving, Zhonglu Zhang, Christopher M. Warren, Yi Lei, Qiang Xing, Hong Li

Psychology Faculty Publications

The mutual influence of stimulus complexity and chunk tightness on perceptual restructuring was examined using a chunk decomposition task (CDT). Participants attempted to remove components of Chinese characters in order to produce new, valid characters. Participants had their electroencephalogram recorded while completing a CDT in conditions of low or high stimulus complexity, crossed with two levels of chunk tightness. Tight chunks overlapped spatially whereas loose chunks did not. Both increasing chunk tightness and increasing stimulus complexity impaired performance (lower accuracy, longer reaction times), and these factors interacted such that highly complex, tight chunks produced the worst performance. These factors also …