Digital Commons Network^™

Identifying Carbon Structure Via Raman Spectroscopy, Nathaniel Bunker

Utah Space Grant Consortium

• Raman Spectroscopy: a method to determine molecular composition.
• Graphene: a conductive, strong, and lightweight material.
• Our Setup: meant for examining biological samples, not optimized for graphene analysis.

Designing An Optimal Lighting Fixture For Extraterrestrial Crop Growth: Integrating Efficacy And Photobiology, Paul Kusuma

Utah Space Grant Consortium

Extraterrestrial crop growth will require the development of technologies that provide photons to drive photosynthesis. Light-emitting diode (LED) technology is the likely technology of choice due to 1) its inherent flexibility, and 2) its high efficiency. Here we describe two important considerations for the optimization of this system: photon efficacy (μmol of photons produced per joule of input electrical energy) and spectral effects on plant growth and development. With these two considerations, we suggest the design of an LED fixture for extraterrestrial crop growth that contains a 5:10:55:30 ratio of blue, green, red, and far-red photons (respectively). This would be …

Connecting Land Cover To Benthic Cover Within The Watershed: Quantifying Impacts Of Terrigenous Sediment On Coral Reef Health And Morphology Using Remote Sensing And Machine Learning, L. Kalai Ellis

Utah Space Grant Consortium

Erosion, with associated sedimentation of reefs and loss of habitat for marine and coastal species, is one of the most pressing environmental challenges in Hawaii. Identifying hotspots of soil erosion guides management on land, but limited work has been done connecting land cover to coral reef health and morphology. Current reef survey methods overgeneralize the spatial variation of benthic cover and this has been reflected in incorrect Geographic Information System (GIS) layers of the reef. We propose a novel and more holistic approach to improve accuracy by connecting sedimentation from source to sink using Unmanned Aerial Vehicles (UAVs), Unmanned Surface …

Long-Term Spatiotemporal Monitoring And Analysis Of Chlorophyll-A Concentrations In Utah Lake, Kaylee Tanner

Utah Space Grant Consortium

Utah Lake is a unique and valuable natural resource in the semi-arid Utah Valley. Shallow, turbid, eutrophic, and slightly saline, the lake degrades and stabilizes pollution well [1]. The lake is a highly productive ecosystem and provides ecological habitats, water storage, and recreation. Detection of harmful algal blooms (HABs), however, has closed Utah Lake beaches every summer since 2016 [2] and raised concerns over the health of the lake ecosystem [3, 4]. HABs, which involve excessive algal growth that can cause hypoxic and/or toxic water conditions [5], have numerous detrimental effects [6] on lakes and reservoirs in the United States …

Feedback Control Of Particle Positions Using Electric Fields And Chemical Gradients, Mark Mcdonald

Utah Space Grant Consortium

Programmable self-assembly is a promising route to new biomaterial and metamaterial synthesis methods. An important step towards programmable self-assembly is moving component parts to desired locations. We do this by designing and simulating a controller that modifies an external field to move particles on desired paths. We first design a controller using electric fields by modifying established methods, then we apply the insights gained from the electric field controller to a chemical controller that uses model predictive control.

Chloroplast Genomes In Populus (Salicaceae): Comparisons From An Intensively Sampled Genus Reveal Dynamic Patterns Of Evolution, Jiawei Zhou, Shuo Zhang, Jie Wang, Hongmei Shen, Bin Ai, Wei Gao, Cuijun Zhang, Qili Fei, Daojun Yuan, Zhiqiang Wu, Luke R. Tembrock, Sen Li, Cuiha Gu, Xuezhu Liao

Aspen Bibliography

The chloroplast is one of two organelles containing a separate genome that codes for essential and distinct cellular functions such as photosynthesis. Given the importance of chloroplasts in plant metabolism, the genomic architecture and gene content have been strongly conserved through long periods of time and as such are useful molecular tools for evolutionary inferences. At present, complete chloroplast genomes from over 4000 species have been deposited into publicly accessible databases. Despite the large number of complete chloroplast genomes, comprehensive analyses regarding genome architecture and gene content have not been conducted for many lineages with complete species sampling. In this …

Sickness Behaviors Across Vertebrate Taxa: Proximate And Ultimate Mechanisms, Patricia C. Lopes, Susannah S. French, Douglas C. Woodhams, Sandra A. Binning

Biology Faculty Publications

There is nothing like a pandemic to get the world thinking about how infectious diseases affect individual behavior. In this respect, sick animals can behave in ways that are dramatically different from healthy animals: altered social interactions and changes to patterns of eating and drinking are all hallmarks of sickness. As a result, behavioral changes associated with inflammatory responses (i.e. sickness behaviors) have important implications for disease spread by affecting contacts with others and with common resources, including water and/or sleeping sites. In this Review, we summarize the behavioral modifications, including changes to thermoregulatory behaviors, known to occur in vertebrates …

A Review Of Harmful Algal Bloom Prediction Models For Lakes And Reservoirs, Jade Snyder Echard

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

Anthropogenic activity has led to eutrophication in water bodies across the world. This eutrophication promotes blooms, cyanobacteria being among the most notorious bloom organisms. Cyanobacterial blooms (more commonly referred to as harmful algal blooms (HABs)) can devastate an ecosystem. Cyanobacteria are resilient microorganisms that have adapted to survive under a variety of conditions, often outcompeting other phytoplankton. Some species of cyanobacteria produce toxins that ward off predators. These toxins can negatively affect the health of the aquatic life, but also can impact animals and humans that drink or come in contact with these noxious waters. Although cyanotoxin’s effects on humans …

Augmenting The Site Analysis Phase Of The Design Process Using Virtual Reality And Drones, Brandon Blauer

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

Virtual reality (VR) is a tool that has been utilized by designers for decades now. In most cases, VR has been utilized in the latter part of the design process. More specifically, VR has been used most commonly towards the design review phase of the design process where people are often looking for a final design suggestion. With regards to the design review phase, there have been many reports discussing the effectiveness of VR. However, there has been little to no research regarding the use of VR in the site analysis phase of the design process.

This thesis develops a …

Utah State University Commencement, 2021 – Main Campus, Utah State University

Commencement Programs

134th Annual Commencement of Utah State University.

Tremblings, May 2021, Western Aspen Alliance

Tremblings

District-wide Aspen Habitat Restoration

Don DeLong

Ashley Egan

A habitat restoration project on the Greys River District is intended to tackle a host of wildlife issues, and our highest priority will be restoring a more natural balance of succession stages in aspen, big sagebrush, and mountain shrubland communities. Particular to aspen, the 2009 Greys River District Aspen Assessment doubled the known acreage of aspen and it identified 84% of the aspen acreage on the district as being overtopped by conifers by moderately-high to very-high degrees. Aspen stands in advanced stages of succession are given the highest priority for treatment. The …

The Fate And Cycling Of Nitrogen, Phosphorous, And Trace Heavy Metals In Beaver-Altered Headwater Streams, Desneiges S. Murray

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Human land-use can increase the amount of non-point source (NPS) pollution in a stream, negatively affecting ecosystem health and beneficial services provided by an ecosystem. Unfortunately, NPS pollution remains high in many waterbodies. Beaver dams may be a passive, cost-effective strategy for removing NPS pollution in headwater streams because beaver dams slow stream flow and collect sediments. Impounded sediments can change how nutrients and pollutants are cycled in a stream through multiple pathways. In the first part of our study, we investigated whether beaver activity can reduce nitrogen, phosphorous and heavy metals from otherwise traveling downstream. Results suggest beaver ponds …

Fatty Acid Composition Of Forages And Their Effect On The Fatty Acid Composition In Beef Cattle, Britney G. Allen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study focused on how diet changes the rumen microbiome in the cattle and the effects of that on the long chain fatty acids (LCFA) by microbes in the rumen, and on the short chain fatty acids (SCFA) these microbes produce from feed carbohydrates like fiber and starch. The abundance of bacteria belonging to the phyla Tenericutes and Proteobacteria increased in response to high-fiber or high-starch diets, respectively. The production of two SCFA was positively correlated with the presence of increased Tenericutes (acetate) and Proteobacteria (propionate). A greater acetate to propionate ratio is associated with elevated production of enteric methane …

Characterizing Oligomeric State Changes Of Protein Arginine Methyltransferase 1 As A Mechanism For Regulating Activity, Ariana N. Ortolano

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

If you imagined a living cell as a factory, enzymes would be the workers with each individually performing a very specific and important job. If a job is not done correctly it could be detrimental to the performance of assembly lines and devastate a businesses’ existence. For enzymes, their jobs occur on a biological level by catalyzing reactions inside the cell, which can include altering another protein and the pathway it is involved in. Protein arginine methyltransferases, or PRMTs, is an example of an enzyme that modifies protein substrates. It does this by adding one or two methyl groups onto …

The Effects Of Ethnic Identity And Family Obligations On Somatic Symptoms Among Latinx Emerging Adults, Jazmin Lara

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Somatic symptoms have been associated with psychological distress across different cultures and are used to diagnose depressive and anxiety disorders in the U.S. Across cultures, individuals with internalizing disorders may present with somatic symptoms outside of the diagnostic criteria, emphasizing the importance of these physical concerns. For example, Latinxs tend to endorse more somatic symptoms than White Americans, suggesting that different cultural aspects may contribute to the higher endorsement of somatic symptoms among Latinxs. However, not many studies have examined specific sociocultural factors that may be influencing somatic symptom report. This is especially true among emerging adults who are in …

Investigations Of Substrate Reduction By Nitrogenase: Light Powered Substrate Reduction By A Cds:Femoco System And Understanding Dinitrogen Inhibition Of Electron Transfer, Hayden Kallas

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Nitrogen fixation is a key step of the nitrogen cycle which makes biologically inert N₂ gas available for organisms to use in the form of ammonia. Nitrogen fixing microorganisms all contain the same enzyme called nitrogenase which catalyzes the six electron transfers to N₂ required for conversion into ammonia. Nitrogenase is a two-component enzyme that contains a cofactor composed of iron and sulfur as well as heavier metals whose identity can be molybdenum, vanadium, or an additional iron atom depending on the variant. The two components of nitrogenase are the MFe protein and the Fe protein. The Fe …

Effects Of Appetitive, Pre-Exposed, And Novel Distracters On Interval Timing Behavior: Role Of Nomifensine Within The Prelimbic Cortex, Alexander R. Matthews

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Poor attentional focus harms the estimation of time within the seconds-to-minutes range, i.e. interval timing. Interval timing behavior is related to several cognitive functions including perception of the passage of time, decision making, and to memory processes. Harmful delays in timing are caused by distractions of attention, within the timing task in the form of novel, or familiar distracters, which may or may not have been previously conditioned. The purpose of this dissertation was to explore how attention to novel or familiar distractions within the timing task can be altered using catecholamine reuptake blocker nomifensine. The experiment in Chapter 3, …

Visitor Perceptions And Resource Conditions Of Campsites In Two Coastal Alaskan National Parks, Shannon T. Wesstrom

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Increasing visitation in parks and protected areas presents managers with the challenge of providing quality visitor experiences while mitigating ecological impacts from recreation. Successful management strategies often suggest determining desired conditions for visitor experiences and ecological conditions to establish thresholds. These thresholds can then be compared to existing conditions in order to determine if changes in management strategies should be made. By integrating visitor survey results with ecological assessments, this research is a unique coastal Alaskan regional analysis of the three components of a management framework: 1. Establishes visitor determined thresholds of acceptability for crowding and coastal resource conditions in …

Evaluating Planning And Management Of Natural Resources Within The Utah State Park System, Erin K. Mann

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A change in management style, combined with increased visitation and the advanced age of guiding documents used to describe conditions and goals (known as Resource Management Plans) in Utah’s State Parks, are leading park managers to potentially not fulfill the objectives stated in their Resource Management Plans. Using a research tool known as “content analysis,” we analyzed the Research Management Plans of ten sample parks and found that written plans had strong priorities and goals regarding the care and management of natural resources. Significant findings included strong emphasis on resource protection, data collection, and research. Pre-written questions were asked of …

Pando's Lessons: Restoration Of A Giant Aspen Clone, Paul C. Rogers, Jody Gale, Darren Mcavoy

Aspen Bibliography

A 106 acre (43 ha) aspen clone lives in the Fishlake National Forest in south-central Utah. Clones are comprised of multiple aspen stems, called ramets, which are genetically identical. This particular colony of ramets was named “Pando” (Latin for “I spread”) by researchers believing it to be the largest living organism by mass on earth. Recently, forest managers have noted a rapid dying of mature stems without recruitment of younger trees. This unsustainable situation has galvanized restoration efforts at Pando. Human interventions caused this imbalance; restoration will rely on protection, monitoring, and innovation. As a laboratory, this forest icon may …

Taphonomy Of Late Jurassic (Tithonian) Morrison Formation Apatosaurus Sp. Vertebrae Found Associated With Teeth From Allosaurus Sp. And Ceratosaurus Sp., And Body Size Extrapolation From The Associated Theropod Teeth., Greg C. Agyan

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

An Apatosaurus sp. locality from Dinosaur National Monument designated DNM-15 was excavated in 1985, and associated with two Allosaurus teeth and one Ceratosaurus tooth that were near one of the caudal vertebrae. The Ceratosaurus tooth was buried between an overlying rib and that same caudal vertebra. The caudal vertebrae of the DNM-15 Apatosaurus were intact and articulated, but the anterior skeleton was mostly absent, with a row of articulated sacral vertebrae in close association with a femur. Two other Allosaurus teeth were reported near the preserved ilium of the Apatosaurus, but they could not be located in the collections. …

The River, The Residents, And The City: A Holistic Vision Study For Logan River's Upper Reach, Lisa Aedo

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

The three-mile Upper Reach of the Logan River starting at the USU Water Lab to the 100 East bridge has been negatively impacted by residential development and diversion for agriculture and industry. A task force comprised of faculty at USU, professionals, government and city officials, and concerned residents has developed a Conservation Action Plan focused on twenty-two baseline indicators which, if improved, can help rehabilitate the river. This thesis looks at the factors that created the current challenges and seeks to provide a holistic vision with design solutions to address said challenges in alignment with that Plan. A literature review …

Patterns Of Post-Fire Aspen Seedling Establishment, Growth, And Mortality In The Western United States, Mark Regier Kreider

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Sexual seedling establishment in aspen is increasingly recognized as an important natural regeneration pathway for the species in the western U.S. However, information on seedling abundance as well as factors influencing aspen sexual regeneration is limited and frequently anecdotal, due to historical assumptions of seedling rarity as well as difficulty identifying sexual seedlings from asexual aspen sucker regeneration. This thesis contributes to the field of aspen seedling ecology in three major ways. Chapter 1 utilizes historical aspen seedling occurrences in the western U.S. and a systematic field survey of 2018 fire footprints to explore patterns and test assumptions of aspen …

Snake Mind, Wolf Body, Panther Courage: Jojo Rabbit As A Critique Of Hegemonic Masculinity, Christian W. Lippert

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In 2019, the movie Jojo Rabbit (Waititi, 2019) was released to theaters. Because the film uses comedy and satire to tell a story about Jojo, a young Nazi who has Hitler as an imaginary friend, it received mix reviews. This analysis focuses on how the movie sheds light on the negative influence of hegemonic masculinity. Hegemonic masculinity refers to the messages and actions that place men above women or types of masculinity above femininity and other masculinities. Jojo’s desire to be a Nazi is deeply connected to his desire to be man. This analysis examines how hegemonic masculinity a) can …

Interactive Effects Of Soil And Browsing On Big Sagebrush: Implications For Restoration Success, Kyle Nehring

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

Heterogeneity in landscape conditions (e.g., soil types) precludes a “one size fits all” management strategy across large landscapes. New management approaches that explicitly account for heterogeneous landscapes (and the variable conditions therein) will be required to maintain habitat quality. In particular, we require an improved mechanistic understanding of how the outcomes of conservation and restoration actions are contingent upon a) contextual abiotic factors (e.g., moisture availability mediated by soils and precipitation) and b) their interactions with biotic factors (e.g., browsing wildlife).

We propose to answer fundamental questions about how big sagebrush (Artemisia tridentata), the foundational species for sagebrush …

Connected Through Adoption, Sherry Ward

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

My work is often times a reflection of human connection. I am fascinated by how and why humans develop deep connections to one another. I was captivated by an image I photographed that depicted a bond between two sisters that existed despite their lack of biological relatedness or racial heritage. Many consider home to be where connections and bonds are created and strengthened. Within these walls, most feel they can be the truest form of themselves. It is within that truth that unconditional bonds without regard to race or biological relatedness may be formed. How do these bonds develop among …

An Examination Of Articulatory Precision In Children And Adults With Autism Spectrum Disorder, Elizabeth R. Josephson

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

The speech of individuals with autism spectrum disorder (ASD) has been perceptually judged as less clear and articulate than the speech of their typically developing (TD) peers. Some evidence suggests that reduced articulatory precision may contribute to negative listener impressions of individuals with ASD. Using an objective, holistic measure of articulatory precision, findings from a corpus of 900 semi-structured speech samples indicate that individuals with ASD produced speech with reduced articulatory precision compared to TD peers. In both TD populations and populations with ASD, children were less precise than adults. While more research is required to substantiate these preliminary findings, …

Improving The Specificity Of Vertical Stiffness Measurement In Depth Jump Landings, Miles Mercer

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

Greater lower extremity stiffness has been shown to increase bilateral jump height through stretch-shortening cycle optimization. Currently, there are two established methods for estimating vertical stiffness (K_vert) of the human body, which is a variant of lower extremity stiffness. The validity of these methods for estimating K_vert in non-cyclical human movements has been questioned recently due to the complex physiological and neuromotor factors that support stiffness regulation in the muscle-tendon complex. The purpose of the present study was to improve the specificity of K_vert measurement using direct derivation of vertical ground reaction force (GRF) and center …

Informed Polluters: A Comparison Between Pollutant Sources Of Two Lakes And Resulting Remediation Strategies, Jeffrey Kennedy

Undergraduate Honors Capstone Projects

Excess nutrients are a problem for many lakes and rivers across the country. The U.S. Environmental Protection Agency (EPA) requires states to monitor polluted waterbodies and provide plans to remediate them. These plans are commonly submitted in a Total Maximum Daily Load (TMDL) report where sources and polluters are identified. These reports have not been successful, however, at solving all nutrient problems.

Newman Lake in Washington and Mantua Reservoir in Utah are two lakes that continue to receive excess nutrients, notably phosphorus. High levels of these nutrients lead to increased biological activity and subsequent drops in dissolved oxygen. Many lakes …

Self-Regulated Learning In A Pandemic: Implementing The See Framework In An Online Teaching Environment, Haley Hand

Undergraduate Honors Capstone Projects

Self-regulated learning (SRL) is a cyclical process that motivates students and facilitates achievement in a variety of domains (Wang, 2013). It entails several processes, such as planning, setting goals, using learning strategies, self-monitoring, reflecting, and holding adaptive motivational beliefs. Moreover, SRL can be developed through interventions and classroom practices. However, there is a shortage of trained interventionists. Teachers can also use a variety of classroom practices to develop students’ SRL skills. A framework of practices, known as the Settings, Events, and Exchanges (SEE) framework, was developed to organize these classroom practices for teachers (Callan et al., 2020).

The practices in …