Digital Commons Network^™

Weaning Beef Calves, David Secrist

All Current Publications

Weaning a beef calf is likely the most stressful event in the animal’s life. Future growth and reproductive performance can be compromised by health challenges encountered through the weaning process. Consequently, proper management aimed at reducing stress and preparing the beef animal for the next stage of production is critical to reach its genetic potential. Proper management involves applying good animal husbandry techniques, using sound science in developing health and feeding protocols, and implementing low-stress animal handling practices.

Deep Learning For Absorption-Image Analysis, Jacob Morrey, Isaac Peterson, Robert H. Leonard, Joshua M. Wilson, Francisco Fonta, Matthew B. Squires, Spencer E. Olson

Space Dynamics Laboratory Publications

The quantum state of ultracold atoms is often determined through measurement of the spatial distribution of the atom cloud. Absorption imaging of the cloud is regularly used to extract this spatial information. Accurate determination of the parameters which describe the spatial distribution of the cloud is crucial to the success of many ultracold atom applications. In this work, we present modified deep learning image classification models for image regression. To overcome challenges in data collection, we train the model on simulated absorption images. We compare the performance of the deep learning models to least-squares techniques and show that the deep …

Detecting Ionospheric Disturbances Using High Frequency Coastal Radar Transmissions From The West Coast Of The United States, Riley N. Troyer, Kenneth Obenberger, Michael Negale, Eugene Dao, Zsolt Balint, Eric Burnside, Kris Robinson, Jeffrey M. Holmes, Pavel Inchin, Jonathan Snively

Space Dynamics Laboratory Publications

Coastal radar system are located around the world and many happen to transmit at frequencies capable of skywave propagation via the ionosphere. Therefore, they can be detected hundreds to thousands of kilometers away. This paper demonstrates the opportunity to detect 39 Coastal Ocean Dynamics Application Radar transmitters located on the western coast of the United States using three HF radio receivers in Utah and New Mexico. It also illustrates the possibility to use the phase and Doppler measurements of these signals to derive displacements of the refracting ionospheric layer up to meter resolution for the 2023 annular solar eclipse, an …

Barrier Removal Is A Strategy For Climate Resilience, Sarah E. Null, William Bosen, Gregory Goodrum

Watershed Sciences Faculty Publications

Millions of dams and in-stream barriers have been built worldwide to manage water supply, reduce flood risk, generate hydropower, and support recreation, navigation, and road infrastructure. The National Aquatic Barrier Inventory estimates over 550,000 dams and over 298,000 road-related barriers that fragment streams in the United States¹. As dams age and as droughts and floods become more intense, some dams and barriers have become problems, for example, by outliving their useful life, presenting safety concerns to communities, and impacting ecosystems, especially in a changing climate. These dams – the ones that present safety concerns due to their age …

Utah Women And Mental Health: A 2025 Update, Sadie Wilde, Chloe Bhowmick, Kolene Anderson, Susan R. Madsen

Marketing and Strategy Faculty Publications

According to the World Health Organization, “mental health is a state of well-being that enables people to cope with the stresses of life, realize their abilities, learn well and work well, and contribute to their community.”¹ Based on a 2025 ranking from WalletHub, Utah is the 4th “Happiest” state in the nation, so one might draw the conclusion that Utahns experience good mental health. However, the rankings also reveal that Utah does not perform as well in the “Emotional & Physical Well-Being” category (in 27th place).² Because mental health is an important indicator of overall well-being, this report …

Utahns’ Awareness Of The Drying Up Of The Great Salt Lake, Ashley Young

Utah People and Environment Poll (UPEP)

The Great Salt Lake provides several benefits for the state of Utah. It supports industry, recreational activities, and aquaculture. It also provides wetland habitat to twelve million migratory birds.¹ Due to drought induced by climate change and human water use, the lake has been shrinking rapidly in a process known as desiccation. The desiccation threatens the lake’s economic and ecological benefits while also posing other potential challenges. Dust from the dry lakebed may also cause health challenges for humans, as the dust contains harmful amounts of arsenic, lithium, copper, and other metals.²

Utah’s ability to combat desiccation of …

The Untapped Power Of Citizen Science: A Survey Of Utah Residents, Wesley Crump, Elizabeth Cohen, Shital Poudyal

Outcomes and Impact Quarterly

Citizen Science is an approach to involve the public in the scientific process to address locally relevant needs. A survey was conducted to explore Utahns’ relationship with citizen science. Results show a gap between respondents’ past participation and willingness to participate in citizen science, indicating an opportunity for USU Extension to strengthen its relationship with the public through citizen science.

Basic Rabbit Selection And Breeding Considerations, Joseph Okoh, Jessie Hadfield

All Current Publications

This fact sheet is designed to assist rabbit producers in understanding breed selection for a profitable enterprise. It can also serve as a training tool for new producers, aiding them in breed selection and breeding practices.

How Invasive Species Affect Ecosystems, Marion Murray, Meg Kast

All Current Publications

Invasive species can have profound impacts on ecosystems worldwide. In the absence of their natural enemies, invasive species thrive and reproduce quickly. They can have significant ecological and economic effects. This fact sheet outlines the impact of invasive species on biodiversity, nutrient cycles, water quality, and the resulting economic consequences. It also suggests practical tips for responding.

Bite By Bite: How Ungulate Browsing Shapes North America's Forest Future, Darius Hardalau, Vladut Stefanescu, Mindaugas Bakševičius, Michael Manton, Charles Ruffner, Gediminas Brazaitis, Georgeta Ionescu, Ovidiu Ionescu

Aspen Bibliography

Ungulate browsing represents a contemporary issue for forest development, influencing forest regeneration, composition, and management practices across the world, especially in North America. This review synthesizes findings from 101 studies conducted between 1980 and 2025 to examine patterns of herbivory damage through browsing by moose, elk, white-tailed deer, black-tailed deer, and bison. Despite regional variation, high ungulate density consistently emerges as the primary factor driving browsing intensity and ecological and economic impact, leading to decreased social acceptance of coexistence with ungulates. This review highlights the selective suppression of palatable species such as balsam fir, red oak, and white cedar, leading …

Transforming Care: An Academic And Community Symposium On Transgender Care And Experience, Alison Sutton-Ryan, Kimberly Van Vulpen

Transforming Communities

Background: Transgender experience is often excluded from education and training. An emphasis has been often placed on sexual identities instead of gender differences rendering transgender care invisible in the healthcare system (Gahagan & Colpitts 2017). Lack of education and training has created significant barriers to accessible gender-affirming care, contributing to disproportionately high levels of discrimination for transgender individuals seeking medical services (Redcay et al., 2021). Purpose: The Interprofessional Education Symposium on Transgender Care and Experience was an innovative initiative developed by the newly formed Transgender Interprofessional Care Team (TICT) at a medium-sized suburban university. This collaborative team, comprising key …

Nature's Medicine? The Associations Of Organized Youth Sport, Unstructured Physical Activity, And Land-Use Recreation With Children's Mental Health, Emotional Control, And Social Well-Being, Natalie Stagnone, Katherine Alexander, Kat V. Adams, Travis Dorsch

Human Development and Family Studies Student Research

Physical activity is well-established as beneficial for children’s physical and mental health, yet limited research has explored how different activity types impact psychosocial outcomes. This is a cross-sectional study that examined associations between youth participation in organized sport, unstructured physical activity, and land-use recreation and their psychosocial health. Survey data were collected from 3246 caregivers of children in the Intermountain West region of the United States. Respondents reported on children’s physical activity engagement and psychosocial outcomes, including mental health, emotional control, and social well-being. All three activity types were significantly associated with improved psychosocial health (p < 0.001). Compared to organized sport, unstructured physical activity and land-use recreation were associated with significantly higher levels of mental health and emotional control (p_adj < 0.001), although with a small effect size (η^{2 …}

Combining Submicron Spectroscopy Techniques (Afm-Ir And O-Ptir) To Detect And Quantify Nanoplastics In Snow From A Utah Ski Resort, Sara L. Belontz, Janice Brahney, Caroline E. Caplan, Eoghan Dillon, Ting Yan, Gerardo Dominguez

Watershed Sciences Faculty Publications

Atomic force microscopy-based infrared spectroscopy (AFM-IR) and optical photothermal infrared (O-PTIR) spectroscopy are cutting-edge techniques used for precise nanoscale chemical analysis, capable of detecting and characterizing particles smaller than 1 μm. In this study, we applied both techniques to analyze snow subsamples collected from Beaver Mountain, Utah. Quantification by AFM-IR identified a concentration of 1.50 × 10^–1 μg/mL of poly(3-hydroxybutyrate-co-4-hydroxybutyrate), a copolyester known for its biodegradability and biocompatibility and that was the only polymer detected. Notably, 96% of particles had thicknesses below 1 μm, with the smallest particle recorded at 14 nm in height, demonstrating the advantage …

On Programmatic Aspects Of The Universality, Parameter, And Recursion Theorems Of Classical Computability, Vladimir A. Kulyukin

Computer Science Faculty and Staff Publications

The Universality, Parameter, and Recursion Theorems are three foundational results of classical computability theory. We show how these theorems can be programmatically illustrated and partially validated in Lisp. Our programs can be used as supplementary materials to texts on theoretical computer science, mathematical logic, or metamathematics.

Thermal Design Overview, Utah State University Space Dynamics Laboratory

Space Dynamics Laboratory Publications

Preface

• Introductions
• Work Based on "Small Satellite Thermal Modeling Guide, Initial Release, July 2022"
• Air Force Research Laboratory Space Vehicles Directorate (AFRL/RVSV)
• Purpose
• Introduce methods/concepts to develop and analyze a small satellite thermal model
• Understand why thermal modeling and thermal analysis are important
• Understand common pitfalls
• Learn about available resources

Influence Of Age At Harvest And Packaging Conditions On Color Stability Of Bovine Psoas Major Muscle, Xiao Lu, Xin Luo, Sulaiman K. Matarneh

Nutrition, Dietetics, and Food Science Student Research

This study investigated the effect of cattle age on the color stability of Psoas major steaks under different packaging conditions, including polyvinyl chloride (PVC) film packaging, high-oxygen-modified atmosphere packaging (HiOx-MAP), and carbon monoxide modified atmosphere packaging (CO-MAP), over a 14-day storage period. Steaks from old cows had a greater myoglobin content than those from young animals (p < 0.05), resulting in a darker beef color. Regardless of animal age, steaks in PVC and HiOx-MAP exhibited poor color stability during storage, as evidenced by the low color intensity and high surface metmyoglobin (MetMb; p < 0.05). These samples also exhibited a reduced MetMb reducing activity (MRA) and oxygen consumption rate (OCR) and higher 2-thiobarbituric acid reactive substance (TBARS) levels, with these effects being evident in steaks from mature cows. In contrast, steaks stored in CO-MAP had greater redness, MRA, and OCR, along with lower surface MetMb and TBARS levels (p < 0.05), contributing to the limited discoloration of steaks from both age groups. These findings suggest that while both harvest age and packaging affect the shelf stability of bovine steaks, packaging plays a more significant role. CO-MAP proved to be more effective than aerobic packaging and may mitigate age-related differences in color stability.

Ecological Acclimation: A Framework To Integrate Fast And Slow Responses To Climate Change, Michael Stemkovski, Joey R. Bernhardt, Benjamin Wong Blonder, John B. Bradford, Kyra Clark-Wolf, Laura E. Dee, Margaret E. K. Evans, Virginia Iglesias, Loretta C. Johnson, Abigail J. Lynch, Sparkle L. Malone, Booke B. Osborne, Melissa A. Pastore, Michael Paterson, Malin L. Pinsky, Christine R. Rollinson, Oliver Selmoni, Jason J. Venkiteswaran, Anthony P. Walker, Nicole K. Ward, John W. Williams, Claire M. Zarakas, Peter B. Adler

Wildland Resources Faculty Publications

1. Ecological responses to climate change occur across vastly different time-scales, from minutes for physiological plasticity to decades or centuries for community turnover and evolutionary adaptation. Accurately predicting the range of ecosystem trajectories will require models that incorporate both fast processes that may keep pace with climate change and slower ones likely to lag behind and generate disequilibrium dynamics. However, the knowledge necessary for this integration is currently fragmented across disciplines.

2. We develop ‘ecological acclimation’ as a unifying framework to emphasize the similarity of dynamics driven by processes operating on dramatically different time-scales and levels of biological organization. The …

The Link Between Environmental Change And Invasive Species, Marion Murray, Meg Kast

All Current Publications

Climate change and invasive species represent two pressing environmental challenges facing our planet. Each poses a threat to global biodiversity and ecosystem stability, and together, they amplify the impacts of the other. As global temperatures rise and ecosystems are disrupted, new conditions are created that allow invasive species to spread more easily, establish themselves in new areas, and outcompete native species.

Cutthroat Trout In Utah, Hope Northagen, Ethan Gilliam

All Current Publications

This fact sheet is intended to inform anglers, aquatic recreationalists, and backyard conservationists interested in learning about a Utah native species, current restoration steps, and how their actions can help professionals restore native cutthroat trout populations.

Global Variation Of Mesospheric Gravity Waves Observed By Awe, Yucheng Zhao, Jiarong Zhang, Pierre-Dominique Pautet, Ludger Scherliess, Michael J. Taylor

Space Dynamics Laboratory Publications

USU Presentation on the Global Variation of Mesospheric Gravity Waves Observed by AWE

Awe Data Status, P.-Dominique Pautet, Anh Phan, Ludger Scherliess, Yucheng Zhao, Jiarong Zhang, Dallin Tucker, Connor Waite, Pedro Sevilla, Russell Kirkham, Harri Latvakoski, Jacob Adams, Keith Paskett

Space Dynamics Laboratory Publications

SDL Presentation on the AWE data status.

Usu Luminescence Lab Project 356: Durango Colorado Glacial And Fluvial Deposit Luminescence Age Results, Tammy M. Rittenour

Browse all Datasets

Luminescence dating of outwash terraces and glacial moraines. Project investigated the age of older (Bull Lake?) glacial advance sequences near Durango Colorado. Project was supervised by Dr. Jon Harvey at Fort Lewis College. Research was part of an undergraduate research project conducted by Josh Lingbloom.

Roles Of Organic Agriculture For Water Optimization In Arid And Semi-Arid Regions, Shikha Sharma, Matt A. Yost, Jennifer R. Reeve

Plants, Soils and Climate Student Research

Water scarcity is a critical challenge in arid and semi-arid regions, where agricultural water consumption accounts for a significant portion of freshwater use. Conventional agriculture (CA) methods with high reliance on chemical and mechanical inputs often exacerbate this issue through soil degradation and water loss. This review aims to examine how different organic practices, such as mulching, cover cropping, composting, crop rotation, and no-till (NT) in combination with precision technologies, can contribute to water optimization, and it discusses the opportunities and challenges for the adoption and implementation of those practices. Previous findings show that organic agriculture (OA) may outperform CA …

Veterans In Utah: Services, Gaps, And Opportunities, Troy Allan

All Current Publications

This fact sheet, the first in a series, provides an overview of veteran services in Utah, identifying existing resources, areas of unmet need, and opportunities for strategic investment. It is intended for veterans, policymakers, community leaders, and organizations committed to strengthening the health and well-being of Utah’s veteran community, with particular attention to those aging in rural and underserved areas.

The Ieee 4001 Standard For Hyperspectral Imaging, Torbjorn Skauli, John R. Gilchrist, Christopher Durell

The Characterization and Radiometric Calibration for Remote Sensing Annual Meeting (CALCON)

Describing the properties and performance of a hyperspectral camera is more complex than for a conventional camera. Still, up to now, hyperspectral cameras have been described largely in the same terms as conventional cameras, which fall short of what is needed to convey the actual performance to users and potential buyers. Responding to this situation, the IEEE Standards Association established a working group in 2018 to develop a new standard for hyperspectral imaging. More than 200 members of the hyperspectral community have taken part in the work, representing users, manufacturers, government labs and academia. This extensive work has resulted in …

Spectral Quantum Efficiency Calibration Of Mid-Infrared Single Photon Detectors, Grant Teply

The Characterization and Radiometric Calibration for Remote Sensing Annual Meeting (CALCON)

Superconducting Nanowire Single Photon Detectors (SNSPDs) can count individual photon hits with a very high efficiency, a very low dark count rate, and very fine time resolution. Since the output is naturally digital, they are an especially promising technology for space missions including NASA’s Origins Space Telescope and Large Interferometer For Exoplanets (LIFE). Over the past 5 years, significant progress has been made in the development of SNSPDs that can sense lower energy photons such as those in the mid-infrared, but the quantum efficiency of these devices remains poorly quantified. The Low Background Infrared (LBIR) facility at NIST has a …

How To Make Radiometric Vicarious Calibration Methods Ready For The Upcoming Space Projects, Damien Rodat, Morgane Chapelier, Sophie Coustance, Emilie Delogu, Camille Desjardins, Arthur Dick, Morgane Farradeche, Lucas Landier, Clement Luitot, Sebastien Marcq, Aime Meygret, Charlotte Revel, Thierry Erudel, Morgan Farges, Xavier Lenot, Martin Bachmann, Emiliano Carmona, Laura La Porta, Miguel Pato, Karl Segl, Lorenzo Giampietri, Ettore Lopinto, Francesco Sarti

The Characterization and Radiometric Calibration for Remote Sensing Annual Meeting (CALCON)

The space projects are always designed to push back the frontiers of what is feasible, focusing for instance on spatial, spectral and/or temporal aspects. In any case, the radiometric quality has to meet the end-user’s requirements, which may also be higher and higher. In the frame of optical Earth observation, the French space agency (CNES) is involved in a large panel of upcoming projects addressing new challenges such as the very high spectral resolution for carbon dioxide monitoring with MICROCARB, the combination of both spatial and spectral resolution for a spectro-imager, the thermal infrared domain with TRISHNA, the polarisation with …

Developing A Consistent And Coordinated Response From The National Metrology Institutes’ Radiometry Community To The Needs Of The Earth Remote Sensing Satellite-Observation Communities, Michelle Stephens, Emma Wolliams

The Characterization and Radiometric Calibration for Remote Sensing Annual Meeting (CALCON)

Modern satellite-based Earth observation measurements demand long-term data records that span multiple missions with reduced uncertainties. SI-traceability and robust uncertainty analyses are key aspects to meeting these demanding requirements. In this presentation we report on the activities of the CCPR-WG-SP TG17, an international task force created within the Bureau International des Poids et Mesures (BIPM) to provide a consistent and coordinated response from the National Metrology Institute (NMI) radiometry community to the needs of the satellite-observation communities.

The BIPM is the international organization through which National Metrology Institutes work together on matters related to metrology. Within the BIPM, the Consultative …

From Picturebooks To Play: Dialogic Pedagogy For Cultivating Agency And Social Awareness In Young Learners, Amanda Deliman

Teacher Education and Leadership Faculty Publications

This study examines how young children engage with picturebooks, discussion, dramatic inquiry, and writing to negotiate diverse perspectives and develop empathy in an early childhood classroom. Grounded in sociocultural and critical literacy theories, the research explores the role of dialogic pedagogy in fostering young learners’ agency and social awareness. Utilizing a qualitative single-case study design, data were collected over a full academic year in a second-grade classroom through video recordings, field notes, interviews, and student artifacts. Thematic analysis revealed that dialogic engagements supported students in developing a shared language about empathy, resolving classroom conflicts, and exploring actionable ways to support …

A New Broadband, Room Temperature Standard Reference Radiometer For High Accuracy Intercomparison Of Radiometric Scales And Instrument Calibration, Cameron Straatsma, Dave Harber, Robert Haun, Karl Heuerman, Nathan Tomlin, Chris Yung, John Lehman, Michelle Stephens

The Characterization and Radiometric Calibration for Remote Sensing Annual Meeting (CALCON)

Frequent intercomparisons between radiometric scales are the foundation of low uncertainty, absolute radiometry. However, radiometric scales are typically established by semi-permanent installations such as cryogenic radiometers and blackbody sources that would require substantial cost and effort to temporarily relocate for intercomparisons. These challenges are often circumvented by using transfer standards. Transfer standards are convenient but add to the overall measurement uncertainty and often multiple standards are needed to cover a broad wavelength range.

We present the development of a compact, room temperature standard reference electrical substitution radiometer (ESR). The radiance, irradiance, and power radiometer (RIPR) incorporates a vertically aligned carbon …