Digital Commons Network^™

Critical Comparison Of Potential Machine Learning Methods For Lightning Thermal Damage Assessment Of Composite Laminates, Juhyeong Lee, Scott L.J. Millen, Xiaodong Xu

Mechanical and Aerospace Engineering Faculty Publications

The present study assesses the potential of using machine learning (ML) methods to predict the extent of lightning thermal damage in fiber-reinforced composite laminates using three supervised machine learning (SML) algorithms: (1) linear regression (LR), (2) decision tree (DT)-based, and (3) MLP models. These models were based on the 10 most significant factors that influence the severity of lightning damage, including three current waveform parameters, four material configurations, and three orthogonal electrical conductivities of each composite. All models demonstrated good performance with coefficient of determination (R²) values between 0.84 ~ 0.96. The multilayer perceptron (MLP) regression model trained …

A Home Dyer's Garden, Part I: Growing Japanese Indigo, Wesley Crump, Toree Park, Elizabeth Cohen

All Current Publications

Japanese indigo is an annual plant with numerous varieties. Most varieties thrive in the temperate environments found in much of Utah but may exhibit stress in intense heat. This is the first of three fact sheets in the A Home Dyer's Garden series on dyeing with Japanese indigo. It covers how to grow Japanese indigo. Soil preparation, planting and spacing, water, fertilizer, insects and diseases, and harvesting are discussed.

Parrotfeather (Myriophyllum Aquaticum) Identification And Management In Waterways, Jacob Hadfield, Cody Zesiger, Michael Pace, Mirella Ortiz, Corey Ransom

All Current Publications

Parrotfeather (Myriophyllum aquaticum) is an invasive aquatic plant species that grows in ditches, ponds, lakes, and other freshwater habitats. Due to its aggressive nature, parrotfeather will often take over freshwater settings by creating a thick mat covering that prevents sunlight for native aquatic organisms and inhibits regular water flow. This fact sheet discusses identification and management options.

Water Use Efficiency In Rice Under Alternative Wetting And Drying Technique Using Energy Balance Model With Uav Information And Aquacrop In Lambayeque, Peru, Lia Ramos-Fernández, Roxana Peña-Amaro, José Huanuqueño-Murillo, David Quipse-Tito, Mayra Maldonado-Huarhuachi, Elizabeth Heros-Aguilar, Lisveth Flores Del Pino, Edwin Pino-Vargas, Javier Quille-Mamani, Alfonso Torres-Rua

Civil and Environmental Engineering Faculty Publications

In the context of global warming, rising air temperatures are increasing evapotranspiration (ET_c) in all agricultural crops, including rice, a staple food worldwide. Simultaneously, the occurrence of droughts is reducing water availability, affecting traditional irrigation methods for rice cultivation (flood irrigation). The objective of this study was to determine ET_c (water use) and yield performance in rice crop under different irrigation regimes: treatments with continuous flood irrigation (CF) and irrigations with alternating wetting and drying (AWD₅, AWD₁₀, and AWD₂₀) in an experimental area in INIA–Vista Florida. Water balance, rice physiological data, …

Differences In Susceptibility To Sars-Cov-2 Infection Among Transgenic Hace2-Hamster Founder Lines, Scott A. Gibson, Yanan Liu, Rong Li, Brett L. Hurst, Zhiqiang Fan, Venkatraman Siddharthan, Deanna P. Larson, Ashley Y. Sheesley, Rebekah Stewart, Madelyn Kunzler, Irina A. Polejaeva, Arnaud J. Van Wettere, Stefan Moisyadi, John D. Morrey, E. Bart Tarbet, Zhongde Wang

Animal, Dairy, and Veterinary Science Faculty Publications

Animal models that are susceptible to SARS-CoV-2 infection and develop clinical signs like human COVID-19 are desired to understand viral pathogenesis and develop effective medical countermeasures. The golden Syrian hamster is important for the study of SARS-CoV-2 since hamsters are naturally susceptible to SARS-CoV-2. However, infected hamsters show only limited clinical disease and resolve infection quickly. In this study, we describe development of human angiotensin-converting enzyme 2 (hACE2) transgenic hamsters as a model for COVID-19. During development of the model for SARS-CoV-2, we observed that different hACE2 transgenic hamster founder lines varied in their susceptibility to SARS-CoV-2 lethal infection. The …

The Utah Statesman, October 14, 2024, Utah State University

The Utah Statesman

Weekly student newspaper of Utah State University in Logan.

Creating Sustainable School And Home Gardens: Wildlife Monitoring Using Bioacoustics, Kaitlin Campbell, Rita Hagevik, Kathy Cabe Trundle

All Current Publications

Animals use sounds to communicate with each other, just like humans. Humans can listen in on animals by using a bioacoustic monitoring device, a passive device that quietly records surrounding sounds. Bioacoustic monitoring devices blend in with the environment, allowing us to know what types of animals appear when we’re gone. The device collects and stores data and allows us to visualize, analyze, and identify animals from the sounds they make.

Creating Sustainable School And Home Gardens: Using Weather Stations, Jake Sanders, Daniel Findlay, Kathy Cabe Trundle, Rita Hagevik, Kaitlin Campbell

All Current Publications

This fact sheet provides an overview of how weather stations work and the steps to set up your own weather station. To help monitor the water conditions, wind speeds, and temperatures that can impact your plants, we suggest adding a weather station to your garden area or greenhouse.

Irrigation Companies And The Great Salt Lake: Managing Water In Utah Amidst Climate Change, Chloe Francis, Kendall Becker, Matt Yost, Scott Hotaling

All Current Publications

The Great Salt Lake, a key ecosystem and major component of Utah’s identity and economy, is threatened by rapidly declining water levels. This problem has caused widespread and ongoing concern from the public, and the Utah Legislature is faced with making water allocation and management decisions to adapt to the state’s growing population and changing environment. One important group in this discussion is irrigation companies. Here, we examine how irrigation companies receive and maintain water rights in Utah, their significant role in water management, and recent legislative efforts to incentivize efficient water use so more water reaches the Great Salt …

Understanding The Dynamics Of Board-Executive Director Relationships In Nonprofits: A Qualitative Study Of Youth-Serving Nonprofits In Utah, Jaxon Didericksen, Jayme E. Walters, Dorothy Wallis

Social Work Faculty Publications

A functional positive relationship between the executive director (ED) and the board of directors (BOD) is crucial to nonprofits meeting their missions. The present qualitative study sought to identify factors—including traits, behaviors, processes, and experiences—associated with positive relationships between BODs and EDs in youth-serving nonprofits in Utah. Surveys were utilized to identify pairs (N = 6) of board chairs and EDs who had high relationship satisfaction. Individual semi-structured interviews were employed with each participant. Transcripts were analyzed using two-cycle coding, descriptive and pattern coding in which three themes emerged: (1) Background; (2) Roles; and (3) Leadership. The findings illustrated …

Understanding Long Covid: Navigating The Journey To Recovery, Heather H. Kelley, Rachel Byers, Ty Aller, Timothy Keady

All Current Publications

This fact sheet provides very basic facts on what long COVID is and information on how to navigate the healthcare system and cope with long COVID.

Faculty Senate Minutes October 7, 2024, Utah State University

Faculty Senate & Faculty Senate Executive Committee

MINUTES

• Call to Order
  
• University Business
• Faculty Senate Business
• Information - EPC Report September 5, 2024; Human Resources Policies 330 & 392
• Report - Educational Policies Committee Annual Report; Honors Annual Report
• Old Business
• New Business
• Adjourn: 4:07 pm

What Rich County Leaders And Residents Can Do To Strengthen The Impact Of Girls And Women In Their Area, Amy Anderson, Susan R. Madsen

Marketing and Strategy Faculty Publications

This idea sheet is based on a 2024 gathering in Rich County with input from 20 individuals. As Utah’s third smallest county with a wide geographic spread, this included women from across the county. Girls and women face challenges unique to the area in which they live, and the goal of this gathering was to identify those barriers and determine strategies and initiatives that local leaders and residents can implement to address them. This document includes recommendations in the following areas: home and family, education, culture and community engagement, health and wellbeing, and business and economics.

The Utah Statesman, October 7, 2024, Utah State University

The Utah Statesman

Weekly student newspaper of Utah State University in Logan.

Faculty Senate Agenda October 7, 2024, Utah State University

Faculty Senate & Faculty Senate Executive Committee

• 3:00 Call to Order
• Approval of Minutes
• 3:05 University Business
• 3:20 Faculty Senate Business
• 3:35 Information
• EPC Report
• Human Resources Policies 330 & 392
• 3:55 Report
• Educational Policies Committee Annual Report
• Honors Annual Report
• 4:05 Old Business
• 4:10 New Business
• Adjourn: 4:30 pm

Creating Sustainable School And Home Gardens: Composting, Larry Krissek, Kathy Cabe Trundle, Rita Hagevik

All Current Publications

This fact sheet provides information about composting, such as what compost is, how to compost, and the benefits of composting in your garden.

What Daggett County Leaders And Residents Can Do To Strengthen The Impact Of Girls And Women In Their Area, Amy Z. Anderson, Susan R. Madsen

Marketing and Strategy Faculty Publications

This idea sheet is based on a 2024 gathering and subsequent outreach to 15 leaders and community members in Daggett County. As the smallest county in Utah, this represents a higher participation percentage than most.

Girls and women face challenges unique to the area in which they live, and the goal of this gathering was to identify those barriers and determine strategies and initiatives that local leaders and residents can implement to address them. This document includes recommendations in the following areas: home and family, education, health and wellbeing, business and economics, and culture and community engagement.

Coupled Thermal-Electrical-Mechanical Characteristics Of Lightning Damage In Woven Composite Honeycomb Sandwich Structures, Bin Yang, Juhyeong Lee, Yuchen Zhou, Xiaoshan Liu, C. Guedes Soares, Kunkun Fu, Dongmin Yang

Mechanical and Aerospace Engineering Faculty Publications

In this study, lightning strike damage of woven carbon fibre-reinforced polymer laminates (W-CFRPs) and woven composite honeycomb sandwich panels (W-CHSPs) are simulated using the proposed sequential thermal-electrical-mechanical finite element (FE) coupling model incorporating dielectric breakdown of materials. Surface current with an amplitude of 200 kA and corresponding lightning shockwave overpressure were applied on each composite. The FE model coupled with LaRC05 criterion was used to study the failure behaviours of intralaminar damage and interlaminar delamination of the W-CFRPs and W-CHSPs. A series of lightning strike tests were performed to validate the FE model. Detailed lightning damage assessments and mechanisms were …

Discrete Time Series Forecasting Of Hive Weight, In-Hive Temperature, And Hive Entrance Traffic In Non-Invasive Monitoring Of Managed Honey Bee Colonies: Part I, Vladimir A. Kulyukin, Daniel Coster, Aleksey V. Kulyukin, William Meikle, Milagra Weiss

Computer Science Faculty and Staff Publications

From June to October, 2022, we recorded the weight, the internal temperature, and the hive entrance video traffic of ten managed honey bee (Apis mellifera) colonies at a research apiary of the Carl Hayden Bee Research Center in Tucson, AZ, USA. The weight and temperature were recorded every five minutes around the clock. The 30 s videos were recorded every five minutes daily from 7:00 to 20:55. We curated the collected data into a dataset of 758,703 records (208,760–weight; 322,570–temperature; 155,373–video). A principal objective of Part I of our investigation was to use the curated dataset to investigate …

Aridity Drives The Response Of Soil Total And Particulate Organic Carbon To Drought In Temperate Grasslands And Shrublands, Baoku Shi, Manuel Delgado-Baquerizo, Alan K. Knapp, Melinda D. Smith, Sasha Reed, Brooke Osborne, Yolima Carrillo, Fernando T. Maestre, Yu Zhu, Anping Chen, Kate Wilkins, Martin C. Holdrege, Andrew Kulmatiski, Catherine Picon-Cochard, Christiane Roscher, Sally Power, Kerry M. Byrne, Amber C. Churchill, Anke Jentsch, Hugh A. L. Henry, Karen H. Beard, Max A. Schuchardt, Nico Eisenhauer, Rafael Otfinowski, Yann Hautier, Huitao Shen, Yonghui Wang, Zhongwu Wang, Chengliang Wang, Daniela Francis Cusack, Alessandro Petraglia, Michele Carbognani, T’Ai G.W. Forte, S. Luke Flory, Pengli Hou, Tao Zhang, Weifeng Gao, Wei Sun

Wildland Resources Faculty Publications

The increasing prevalence of drought events in grasslands and shrublands worldwide potentially has impacts on soil organic carbon (SOC). We leveraged the International Drought Experiment to study how SOC, including particulate organic carbon (POC) and mineral-associated organic carbon (MAOC) concentrations, responds to extreme drought treatments (1-in-100-year) for 1 to 5 years at 19 sites worldwide. In more mesic areas (aridity index > 0.65), SOC and POC concentrations decreased by 7.9% (±3.9) and 15.9% (±6.2) with drought, respectively, but there were no impacts on MAOC concentrations. However, drought had no impact on SOC, POC, or MAOC concentrations in drylands (aridity index < 0.65). The response of SOC to drought varied along an aridity gradient, concomitant with interannual precipitation variability and standing SOC concentration gradients. These findings highlight the differing response magnitudes of POC and MAOC concentrations to drought and the key regulating role of aridity.

Quantifying The Impact Of Rain-On-Snow Induced Flooding In The Western United States, Brennan Lynn Bean, Emma Watts

Mathematics and Statistics Faculty Publications

The potentially destructive flooding resulting from rain-on-snow (ROS) events motivates efforts to better incorporate these events and their residual effects into flood-related infrastructure design. This paper examines relationships between measured streamflow surges at streamgages across the Western United States and the meteorological conditions preceding them at SNOTEL stations within the same water catchment. Relevant stream surges are identified using a peak detection algorithm via time series analysis, which are then labeled ROS- or non-ROS-induced based on the preceding meteorological conditions. Both empirical and model-derived differences between ROS- and non-ROS-induced stream surges are then explored, which suggest that ROS-induced stream surges …

General Education Subcommittee Minutes October 3, 2024, Utah State University

Educational Policies Committee

• Call to Order

• Approval of Minutes – September 5, 2024

• Course Approvals/Removals/Syllabi Approvals

• New Business – USHE 402 Policy Draft, Final R470 Designation Outcomes

• Additional Items

• Adjourn: 9:30 am

Curriculum Subcommittee Agenda October 3, 2024, Utah State University

Educational Policies Committee

• Approval of Minutes
• Program Proposals
• Semester Course Approval Reviews
• Other Business - Registrar's Summit Topics, Graduate School
• Adjourn: 3:00 pm

Atmospheric Waves Experiment (Awe) Mission Overview, B. Lamborn, L. Scherliess, L. Ruley, H. Latvakoski, E. Syrstad, P. Sevilla, Y. Zhao, G. Cantwell, M. Taylor, D. Pautet

Space Dynamics Laboratory Publications

NASA’s Atmospheric Waves Experiment (AWE) mission is a Heliophysics Small Explorers Mission of Opportunity designed to investigate how terrestrial weather affects space weather, via small-scale atmospheric gravity waves (GWs) produced in Earth’s atmosphere. Following its launch to the International Space Station (ISS) in November 2023, AWE began a 2-year mission to explore the global distribution of AGWs, study the processes controlling their propagation throughout the upper atmosphere, and quantify their impacts on the ionosphere–thermosphere–mesosphere (ITM) system. The AWE science instrument is an ISS–compatible version of the Advanced Mesospheric Temperature Mapper (AMTM)—a wide field-of-view Shortwave Infrared (SWIR) imager that quantifies gravity …

Educational Policies Committee Minutes October 3, 2024, Utah State University

Educational Policies Committee

• Approval of Minutes – September 5, 2024

• Subcommittee Reports – Curriculum Subcommittee, Academic Standards Subcommittee, General Education Subcommittee

• Other Business

• Adjourn: 3:30 pm

Atmospheric Waves Experiment (Awe) Advanced Mesopheric Temperature Mapper (Amtm) Optomechanical Design, Fabrication, And Environmental Test, Tyrel C. Rupp, James Champagne, Greg Hopkins, Roy Esplin, Burt Lamborn, Erik Syrstad, Jordan Jacobson

Space Dynamics Laboratory Publications

The AWE AMTM is a widefield of view (WFOV) infrared imaging radiometer designed for use in measuring the P₁(2) and P₁(4) emission lines of the earth’s OH layer to determine temperature and produce images of gravity waves. The sensor was designed, built, and characterized by Utah State University (USU) Space Dynamics Laboratory (SDL) and has been externally mounted to the International Space Station (ISS) looking nadir to collect images for analysis for a minimum of two years. The Opto-Mechanical Assembly (OMA) consists of four identical imaging telescopes, each comprised of a fisheye lens, a field lens, …

The Status Of Women Leaders In Utah Business: A 2024 Update, Shirlayne Quayle, Susan R. Madsen, Robyn Blackburn

Marketing and Strategy Faculty Publications

In 2014, the Utah Women & Leadership Project (UWLP) released a research and policy brief titled “The Status of Women Leaders in Utah Business.”¹ The brief was updated in 2018 to determine what, if any, progress had been made in women’s leadership within Utah’s business sector.² Unfortunately, in most areas, instead of making progress, the percentage had decreased. Now, six years later, we are providing yet another update. In each brief, we compare Utah data with national data and review the applicable literature addressing women in the highest levels of business leadership, including C-level positions and presence on …

What Piute County Leaders And Residents Can Do To Strengthen The Impact Of Girls And Women In Their Area, Deborah Lin, Susan R. Madsen

Marketing and Strategy Faculty Publications

This idea sheet is based on a 2024 gathering of leaders in Piute County, with input from 18 individuals. With just over 1,400 residents, this represents a higher percentage participation than in most counties.

Girls and women face challenges unique to the area in which they live, and the goal of this gathering was to identify those barriers and determine strategies and initiatives that local leaders and residents can implement to address them. This document includes recommendations in the following areas: home and family, education, business and economics, government and community, and culture.

Mental Model-Based Designs: The Study In Privacy Policy Landscape, Hanieh Atashpanjeh, Rizu Paudel, Mahdi Nasrullah Al-Ameen

Computer Science Student Research

Users' mental models influence secure and privacy-preserving behavior in a computing environment. Prior studies on users' mental models of Internet, security tools, and digital privacy show that there is no one-size-fits-all solution when it comes to security and privacy design. However, little study to date has explored the ways to translate users' mental models into interactive security and privacy designs. As we begin to address this gap, we focus on privacy policy in this paper. The typical text-based privacy policy suffers from poor readability and usability. A recent study proposed a Visual Interactive Privacy Policy (VIPP), showing promise to offer …

Modeling Permittivity Measurements Of Thin Film Materials Versus Film Thickness, Jr Dennison, Cameron Eggleston

Journal Articles

Measured permittivity of thin film polymeric samples were substantially less for thin samples, asymptotically approaching bulk values above ~500 μm. For ~25 μm samples the observed permittivities were as much as 50% less than for bulk measurements. This behavior has been studied for four common homogeneous polymeric materials for sample thickness in the range of ~10 μm to > 1000 μm. To quantify these observations, an empirical single-parameter model was developed to correct measured permittivity of thin samples based on an effective stray capacitance in series with the samples to compensate for effects attributed to instrumentation.