Life Sciences Commons^™

The Role Of The Avian Medial Hippocampal Formation In High-Similarity Spatial Discrimination, Alexandre Lebel

Theses and Dissertations (Comprehensive)

Similar stimuli can create spatial-perceptual challenges, thus leading to errors in recall. To combat this interference, organisms rely on processes within the hippocampal formation (HF) that support the discrimination of highly similar memories. In mammals, memory interference is thought to be reduced by decreasing the correlation between traces of similar events; a process termed pattern separation, often by the dentate gyrus. The extent to which birds, which have granule cells (GCs) but lack a dentate gyrus, utilize HF-dependent mechanisms to mitigate memory retrieval errors remains unclear. This study investigates the role of the triangular region and area V (proposed homologs …

Endogenous Light In The Brain: Investigating Sources, Propagation, And State-Dependent Emission, Emre Cicek

Theses and Dissertations (Comprehensive)

Ultraweak photon emission (UPE), and by extension light, has long been thought to be a modality of communication in nature. Prior studies have already identified that UPE can depend on cell type and can be used to discern between malignant and benign cells. However, besides theoretical models, not much effort has been made to identify possible biological structures that would allow for light to be used as a method of communication in the human body. According to the framework set by Shannon’s Information Theory, for communication to be possible at minimum a transmitter, a transmission channel, and a receiver are …

Sediment Redox-Driven Iron Flux And Phytoplankton Community Responses: Implications For Cyanobacterial Suppression And Functional Stability Across Boreal Lakes, Julia K. Kozak

Theses and Dissertations (Comprehensive)

Freshwater eutrophication contributes towards the development of cyanobacterial harmful algal blooms (cHABs), but nutrient availability alone does not fully explain variation in phytoplankton community composition or physiological performance. While phosphorus (P) availability has been known to regulate phytoplanktonic biomass, iron (Fe) is an important micronutrient supporting Fe-heavy processes within cyanobacteria (i.e., nitrogen fixation and photosynthetic electron transport). Sediment Fe availability in freshwater ecosystems is regulated by reduction oxidation (redox) conditions at the sediment-water interface (SWI), where nitrate (NO₃^-) has been found to maintain oxidizing conditions and prevent the reduction of Fe(III) to more readily bioavailable soluble Fe(II), …

Push-Pull Farming System Helps Insure Smallholder Maize Production Under Climate Change, Yann Clough, Wilhelm May, Timothy Luttermoser, Dickens Nyagol, Nikolaos Alexandridis, Frank Chidawanyika, Mattias Jonsson, Charles A.O. Midega, Katja Poveda, Zeyaur R. Khan

All Peer-Reviewed Publications

Agroecological approaches harnessing in-field biodiversity have been highlighted as a sustainable way to reduce yield gaps, but long-term assessments of their ability to buffer production from weather extremes and increasing interannual and intraseasonal climate variability are scarce. Here, we analyze a 12-year dataset from 642 control vs. push-pull maize field pairs in western Kenya, where long-term climate trends include increasing temperatures and intensifying drought and rainfall. In push-pull, maize is intercropped with a fodder legume that improves soil fertility, suppresses weeds, and deters pests, and is bordered with fodder grasses attracting and suppressing the pests. We assess interactions between push-pull …

Diet Quality As Assessed By The Healthy Eating Index-2020 Among Individuals Diagnosed With And Without Type 2 Diabetes, Minghao Zhou, Hairui Yu, Renee Underwood, Hongning Cai, Tung Sung Tseng, Susu Luo

School of Public Health Faculty Publications

Background: Dietary management is key to preventing and controlling type 2 diabetes mellitus (T2DM). However, few studies have examined differences in Healthy Eating Index (HEI-2020) scores and components among individuals with and without diagnosed T2DM. This study aimed to assess gender differences in HEI-2020 scores and its 13 components by T2DM status. Methods: Using National Health and Nutrition Examination Survey (NHANES) data from 2011 to 2018, this cross-sectional study analyzed 19,464 adults. Diagnosed T2DM was identified via self-report or diabetes medication use. Diet quality was assessed using the HEI-2020, scored from 0 to 100, with a higher HEI score indicates …

Nourishing Births: A Program Evaluation Proposal For Community-Based Nutrition Education, Food Access, And Garden Engagement Among Black Birthing People, Naa Deedei-Vera Hammond

Master's Projects and Capstones

Black birthing people in the United States continue to experience unequal maternal health outcomes, shaped in part by racism and barriers to nutritious food, culturally relevant health education, and supportive community spaces. While prenatal nutrition education and food assistance programs can provide important resources, information alone cannot address the challenges many people face when trying to access healthy and affordable food during pregnancy. The Nourishing Births Initiative is a proposed community-based maternal health program designed to respond to these needs by bringing together prenatal nutrition education, help connecting to food resources, community gardening, and peer support for Black birthing people …

Enhancing Shipboard Safety Management Under The Ism Code: An Innovative Risk Assessment Framework With A Stern Tube Case Study, Pi-Yen Lin

Journal of Marine Science and Technology–Taiwan

The shipboard safety management system (SMS) is designed to enhance safe operations, risk management, and emergency response to improve overall ship safety and efficiency. This paper demonstrates the use of an engine room simulator (ERS) for collecting failure modes and applies it to a comprehensive failure analysis of the stern tube lubricating oil system. A new risk closeness coefficient method was developed, integrating expert background knowledge and weighted risk assessments. The analysis, based on multiple expert evaluations, covered five subsystems, eight main components, 23 failure modes, and 112 failure causes. This study presents 26 recommendations for maritime practitioners and onboard …

Surveillance And Comparative Genomics Of Bacteria From Hospital And Human Reservoirs, Emily E. Benedict

WUSM Theses and Dissertations – All Programs

Bacteria are diverse and adaptable and, consequently, present in a wide variety of environments. They are capable of growing under intense pressures, including those brought on by the human immune system and disinfection strategies. To survive these pressures, bacteria develop resistances. Antimicrobial resistance, which occurs when a microbe is no longer responsive to the antibiotic intended to control it, is one such adaptation that presents an especially serious threat, as it limits treatment options for infections caused by antimicrobial resistant microbes. Similarly, the ability of bacteria to survive in environments subjected to heavy disinfection efforts, such as intensive care units …

Port And Vessel Communication Traffic Intrusion Detection: A Variational Autoencoder‑Enhanced Multilayer Perceptron Approach, Chien-Lin Chiang, Hsien-Cheng Chou, Ming-Yuan Peng, Yi-Yuan Chiang, Yu-Shun Liu

Journal of Marine Science and Technology–Taiwan

Port and vessel networks increasingly operate on IP/Ethernet backbones with high‑noise, high‑dimensional traffic. We present a lightweight hybrid intrusion‑detection model that couples a variational autoencoder (VAE) with a multilayer perceptron (MLP) and augments training with a boundary‑oriented latent‑space mixup strategy. The VAE models the distribution of normal traffic and identifies anomalies through reconstruction errors. Subsequently, it generates robust latent vectors, enabling the MLP to perform highly accurate supervised classification. On the UNSW‑NB15 dataset, the proposed pipeline attains ≥97% accuracy and an outstanding recall of 99.56% in binary intrusion detection, and visualization of the latent space (PCA) together with reconstruction‑error analyses …

Sar Ship Detection Based On Shallow Feature Guidance, Chenxu Xia, Peng Chen, Ya Zhang, Ying Li

Journal of Marine Science and Technology–Taiwan

Maritime ship detection is of great significance for both military security and civilian applications. Synthetic Aperture Radar (SAR), with its all-weather and all-day imaging capability, plays a vital role in maritime surveillance. Nevertheless, SAR ship targets typically appear small in scale, embedded in complex backgrounds, blurred at boundaries, and easily confused with near-shore features, which pose substantial challenges for accurate detection. To address these issues, we propose a SAR ship detection network that integrates dual enhancements of small-object representation and edge information. The network introduces two key components: the Small Target Refine Pyramid (STRP) to strengthen shallow feature representation for …

Robust Statistical Methods For Microbiome Abundance Data, Yiming Shi

WUSM Theses and Dissertations – All Programs

Differential abundance analysis in microbiome studies aims to identify taxa whose abundance differs across biological or clinical conditions. The observed data are typically taxon-specific sequencing read counts, representing reads assigned to different taxa within each sample. These counts are indirect measurements of the underlying microbial abundance profile and are constrained by sample-specific library sizes. Microbiome count data are also typically sparse, overdispersed, and heteroscedastic. Together, these characteristics create substantial challenges for differential abundance analysis and make the results highly sensitive to normalization procedures, model specification, and the statistical methods used for inference.

Normalization defines the scale on which samples are …

Investigating The Ability Of Presequences To Influence Mitochondrial Protein Import, Youmian Yan

WUSM Theses and Dissertations – All Programs

Mitochondria are essential organelles housing over 1000 proteins, 99% of which are nuclear-encoded and synthesized in the cytosol. Most mitochondrial proteins are targeted by a positively charged sequence called the presequence, which lacks a common sequence motif and is poorly conserved across evolution. Accumulating evidence suggests that presequences encode meaningful information that influences mitochondrial protein uptake. For instance, multiple stress response models propose that stress sensing proteins contain “weak” presequences which allows them to monitor mitochondrial health. However, there is a lack of systematic examination about how presequences influence import kinetics and what constitutes presequence strength. These gaps in knowledge …

Taste Of Florence: A Hospitality Student's Guide To Study Abroad In Florence, Emma M. Mcclure

Human Nutrition and Hospitality Management Undergraduate Honors Theses

The goal of this creative project is to better prepare hospitality student for studying abroad in Florence, Italy. Studying abroad can be a daunting class, but there’s so many benefits from doing it. For example, you learn a lot about yourself and others around you. It better prepares you for after college because it teaches you life lessons like becoming more aware of the world around you. It also sets you apart from others when you start to apply for internships or jobs, because it shows the companies that you are independent and culturally diverse.

The results that I gathered …

Balancing Root-Zone Oxygenation And Rhizosphere Stability: The Impact Of Aeration And Hypoxia On Hydroponic Plant Growth, Christian D. Baker

All Graduate Theses and Dissertations, Fall 2023 to Present

As the global population and food demand continue to increase, growers must look to innovative and sustainable methods for plant cultivation. Hydroponics is a popular method of sustainable plant cultivation where plant roots are suspended over a liquid nutrient solution. Hydroponics uses less water compared to traditional agriculture because there is no evaporation or solution runoff. It also maximizes land use, requires fewer pesticides and herbicides, and enables year-round cultivation in controlled environments. However, indoor hydroponic systems rely on artificial lighting, which has higher energy costs than traditional farming methods. Optimizing growing conditions is therefore critical to ensure long-term economic …

Kinesiology Department Chairs’ Perceptions Of Their Training And Preparation, Kason O’Neil

Electronic Theses and Dissertations

Department chairs are responsible for leading academic departments in higher education.  These individuals regularly make important decisions regarding such things as managing faculty and academic programming, overseeing budgets, and supporting student needs. Despite these responsibilities, many people become department chairs without receiving formal leadership training. This study explored how kinesiology department chairs across the United States viewed their preparation for the role and the importance of leadership training. A total of 111 department chairs completed an online survey about their background, previous training, and the importance of training for different administrative responsibilities. The results showed that most chairs had little …

Wildfire And Fuel Treatments In Utah: A Practical Guide And Outcomes From An Oak-Maple Ecosystem, Annie E. Prescott

All Graduate Theses and Dissertations, Fall 2023 to Present

Wildfire is a natural part of Utah’s landscapes, but as wildfires become more extreme and communities continue to expand into wildland areas, it is increasingly important to understand how wildfires behave and how their negative effects can be mitigated. One way to reduce wildfire risks and protect life, property, and ecosystem services is through fuel treatments — actions that reduce the amount and arrangement of flammable vegetation through mechanical removal, wildland fire, or other methods.

Information on wildfire behavior and fuel treatments is abundant but often scattered, ecosystem-specific and difficult to access. In addition, most research in the Western U.S. …

Toward Optimizing Fruit Production In Utah Soils: Apple Salt Tolerance Screening And Tart Cherry Fertility Management, Kaitlin Dabbs

All Graduate Theses and Dissertations, Fall 2023 to Present

Fruit production in Utah can be challenging due to local climate and soil conditions. Tart cherries and apples are major fruit crops in Utah, and improvements to these cropping systems would be beneficial for farmers and local consumers. Two experiments were conducted to evaluate desired improvements for these crops. The first study looked for salt tolerance in ten new apple rootstocks. Salty soils can be found throughout the state limiting the land suitable for apple production. When grown in salty soils apple trees often have reduced growth and production potential. A specialized drip irrigation system was constructed in a greenhouse …

The Willing And The Compelled: How Power And Place Shape Human-Bison Coexistence In Poland And The United States, Patrick Orville Kelly

All Graduate Theses and Dissertations, Fall 2023 to Present

Wildlife recovery programs depend not just on animals, but on how people feel about living with them. The degree to which people accept the disruptions wildlife brings to their lives, known as social tolerance, can determine whether a recovery program succeeds or fails, yet it remains understudied and underapplied in management plans. This dissertation studies how people in Poland and the western United States feel about living with the two living species of bison, the largest land animals in Europe and North America. In Poland, we surveyed 242 residents living at different distances from European bison habitat. Surprisingly, the most …

Autonomous Smart Vertical Farming: A Systems-Level Synthesis Of Iot And Solar Energy Integration For Sustainable Agriculture, Mahmuda Khatun Mishu, Md Rokonuzzaman, Boon Kar Yap, Tofan Agung Eka Prasetya, Md Arif Hossain, Asif Islam, Kazi Sajedur Rahman, Mohammad Nur-E-Alam

Research outputs 2022 to 2026

Rapid urbanization, land degradation, and climate variability are increasingly constraining food production, especially in densely populated urban regions. Vertical farming (VF), which grows crops in stacked layers under controlled conditions, is gaining recognition as a potential solution for sustainable urban agriculture. However, high energy requirements and questions surrounding long-term resource efficiency continue to challenge its scalability and environmental viability. This review explores the potential of smart vertical farming (SVF) systems, enhanced by the Internet of Things (IoT), wireless sensor networks (WSNs), and hybrid green energy-harvesting systems such as photovoltaic (PV) and thermoelectric (TE) technologies. This research analyzes how real-time data-driven …

Methods For Tagging Whale Sharks: Insights Into Performance And Best Practices With A Focus On Clamp Attachments, Freya C. Womersley, Sofia Green, Alberto Garcia-Baciero, Ronan Conlon, Amy L. Jeffries, Matt J. Waller, Sara S. Ratão, Nuno Queiroz, Pedro Afonso, Gonzalo Araujo, Adam Barnett, Christine Barry, Michael L. Berumen, Farukhkha Bloch, Ginevra Boldrocchi, Camrin D. Braun, Ryan Caillouet, Constance Chapman, Jesse E.M. Cochran

Faculty Publications

Background: Biologging and telemetry have transformed our understanding of marine megafauna movement ecology. Yet, methodological constraints continue to limit data quality and deployment duration. Devices recording whale shark (Rhincodon typus) behaviours and movements have been used for decades, but they remain challenging to deploy and vary in success. Recently, spring-loaded clamp-based systems have emerged as one of the most widely used approaches to attach electronic tags to the fins of this globally endangered species. Currently, however, no consensus guidelines exist as to how to optimise this approach, potentially leading to continued underperforming deployments limiting analysis potential. Here, we synthesise experiences …

A Global High-Resolution Comprehensive Heat Indices Dataset From 1950 To 2024, Abdul Malik, Sateesh Masabathini, Mohsin Ahmed Shaikh, Qinqin Kong, Muhammad Usman, Dasari Hari Prasad, Ibrahim Hoteit

All Works

Heatwaves are becoming more intense and frequent as global temperatures rise, affecting vulnerable populations, particularly in low-income communities. Addressing the impacts of heatwaves requires high-resolution data to assess their influence on labour productivity, public health, and climate risk. We introduce the Comprehensive Heat Indices (CHI) dataset, a high-resolution (0.1° × 0.1°) hourly dataset from 1950 to 2024, derived from the ERA5 and ERA5-Land reanalyses. The CHI dataset encompasses thirteen heat stress indices, including wet-bulb temperature, universal thermal climate index, mean radiant temperature, wind chill, and lethal heat stress index (Ls). Thresholds for Ls are empirically linked to mortality, enabling the …

Exploring Competitive Dynamics Between Pseudomonas Baetica And Salmonella In A Polymicrobial System, Braxton E.M. Stout

Electronic Theses and Dissertations

The global rise in antimicrobial resistance has catalyzed a greater focus on polymicrobial research aimed at characterizing microbial interactions and uncovering new therapeutic strategies. Though it has long been of interest, environmental soil-derived bacteria remain largely under-represented in research and thus uncharacterized in this field. This project aimed to identify soil microbes that display inhibitory mechanisms to potential nosocomial pathogens. Soil sample S1S3-2 displayed inhibitory phenotypes toward numerous bacteria and was identified as Pseudomonas baetica. In both planktonic and biofilm growth, P. baetica was able to inhibit Salmonella arizonae through a contact-dependent and temperature-dependent manner. Screening of a transposon insertion …

Long-Term Analysis Of Pm2.5 Elemental Composition And Source Contributions In Coastal Urban Environments Of Corpus Christi And Houston In Texas, Sai Deepak Pinakana, Jeremy A. Sarnat, Amit U. Raysoni

School of Earth, Environmental, & Marine Sciences Faculty Publications

Long-term assessments of fine particulate matter play a key role in identifying persistent and emerging emission contributors. Coastal urban areas are highly susceptible to transboundary dust and wildfire events in addition to local pollution sources. Multi-decadal assessments in these regions using chemical speciation data could offer insights into major pollutant sources and their trends. This study utilizes nearly two decades of PM2.5 elemental composition data at two major coastal cities in Texas: Houston and Corpus Christi. Fourteen trace elements were analyzed to characterize the seasonal variability and long-term source evolution using a combination of Spearman’s correlation analysis, principal component analysis, …

Evaluating The Pulse Of Exercise Programs: Developing And Validating The Intervention Usability Scale For Exercise (Iuse) To Enhance Implementation And Adherence, Anne Inger Mørtvedt, Eva Ageberg, Steven Elmer, Kevin Trewartha, Erich Petushek

Michigan Tech Publications

Background: Adherence to exercise interventions is often suboptimal, despite numerous studies documenting barriers and facilitators. Usability may be a critical yet underexplored determinant of adherence. This study aimed to develop and assess the psychometric properties of the Intervention Usability Scale for Exercise (IUSE). Methods: Item generation and content validation involved cognitive interviews and feedback from eight exercise intervention stakeholders and ten target users from the general public. Subsequently, 526 target users from University, Qualtrics and Prolific participant panels assessed exercise programs through an online survey. Dimensionality was assessed using Principal Component Analysis (PCA), Exploratory Factor Analysis (EFA), and bifactor models. …

Producer Organizations, Productivity And Sustainable Intensification Practices In Oil Palm Production, Martin Paul Tabe-Ojong, Abebayehu Girma Geffersa, Kibrom T. Sibhatu

All Peer-Reviewed Publications

Oil palm production is expanding in traditional farming and forested areas, especially in West and Central Africa around the Congo Forest Basin and mostly characterized by declining yields and yield gaps. Due to typically non-binding land access, independent producers tend to prioritize extensification over intensification, which has negative environmental consequences. Sustainable intensification (SI) of smallholder production is a guiding paradigm that aims to increase yields while minimizing negative environmental impacts. In this study, we examine the relationship between producer organizations (POs), sustainable intensification practices (SIPs), namely mulching and intercropping, and oil palm yields in Cameroon. We estimate actual and counterfactual …

Evaluating The Transformation Of Land Cover, Land Surface Temperature, And Urban Heat Island In Sylhet Division Through Geospatial Analysis, Md Fazle Rabbi Joy, Md Abdur Rahim, Md Mahfuzar Rahman, Sumiaya Amin Preota, Mohammed Mahathee Hossain

School of Earth, Environmental, & Marine Sciences Faculty Publications

Rapid and unplanned urbanization has significantly transformed land use/land cover (LULC), contributing to increased land surface temperature (LST) and the emergence of urban heat islands (UHIs), especially in ecologically fragile regions. This study focuses on the Sylhet Division of Bangladesh, assessing LULC changes, LST dynamics, and UHI expansion from 1994 to 2024 using Landsat satellite imagery, normalized difference vegetation index (NDVI), normalized difference water index (NDWI) indices, and field-based LST validation. Unsupervised classification reveals a 191.75% increase in settlement areas and a 25.65% loss in forest cover. Correspondingly, the highest LST zones (> 30 °C) were absent in 1994 but …

In Adults Older Than 18 Years With Obesity Living In Massachusetts, Can Engaging In A Weight Loss Program Help Them Lose Weight After Insurance Stops Covering Their Weight Loss Medications?, Angel Nagawa

Capstones

Executive summary

The Problem

Obesity rates continue to rise sharply across the United States. Weight loss medications have high compliance but face major insurance restrictions. Strict clinical criteria leave many patients without accessible treatment options.

The Proposed Solution

Launch structured, lifestyle-focused clinical weight loss programs. Provide an effective, accessible alternative to restricted pharmaceutical therapies.

Supporting Evidence

Evaluated data from three distinct randomized controlled trials. Findings confirm successful long-term weight management for program participants. Results prove effective control over serious obesity-related comorbidities.

Policy recommendation

Implement structured lifestyle programs as a primary, frontline intervention modality. Improve broad-scale patient health outcomes across clinical …

A Journey To The Midwest For Migrant Farmwork: Women's Testimonies Examining Their Lived Experiences Using Autoethnography And Plática Research Methodologies, Yesenia G. Alcalá

Theses & Dissertations

A JOURNEY TO THE MIDWEST FOR MIGRANT FARMWORK: WOMEN’S TESTIMONIES EXAMINING THEIR LIVED EXPERIENCES USING AUTOETHNOGRAPHY AND PLÁTICA

RESEARCH METHODOLOGIES

Yesenia Garza Alcalá, Master of Business Administration

University of the Incarnate Word 2026

The purpose of my research was to share the stories of five women who experienced a yearly migratory routine from Del Rio, Texas, to work in farms and factories in the Midwest, and how that annual journey shaped and educated us. The women are four of my older sisters and me, all of whom traveled and worked in the Princeville, Illinois, migrant camp, where we experienced the …

Coastal Land Uplift And Intensified Land-Use Influence Seagrass Carbon And Nitrogen Sink Capacity Over Millennial Timescales, Martin Dahl, Sara Braun, Maria E. Asplund, Mats Björk, Joeri Kaal, Hans W. Linderholm, Elinor Andrén, Thomas Andrén, Žilvinas Ežerinskis, Madhavu Vidya Faizal, Sara C. Forsberg, Andrius Garbaras, Malin E. Kylander, Pere Masqué, Miguel A. Mateo, Justina Šapolaitė, Oscar Serrano, J. Robin Svensson, Olena Vinogradova, Martin Gullström

Research outputs 2022 to 2026

Seagrass meadows store sedimentary carbon and nitrogen and thus play an important role in climate change mitigation and nutrient retention globally. Here we reconstruct the impact of land-use and coastal land uplift on millennial–scale seagrass (Zostera marina) blue carbon and nitrogen accumulation in the Baltic Sea based on a multiproxy paleoreconstruction approach. We show that increased landscape clearance resulted in higher terrestrial runoff and increased accumulation of carbon and nitrogen, whereas land uplift led to hydrodynamically sheltered environments facilitating seagrass colonization, occurring 1700 and > 4000 years ago. The establishment of the seagrass meadows resulted in enhancement of the quality of …

Comparative Analysis Of Amino Acid And Bioactive Peptide Profiles During Time-Resolved Fermentation Of Wheat And Stout Brewer's Spent Grain By Lactiplantibacillus Plantarum, Minh Quoc Ha, Angéla Juhász, Teguh Santoso, Mitchell G. Nye-Wood, Mathilde Berthevas, Zhiyu Zhao, Eileen Kitundu, Tony Chen, Michelle L. Colgrave, Thao T. Le

Research outputs 2022 to 2026

Brewers’ spent grain (BSG), a protein- and fibre-rich brewing by-product, contains bioactive compounds, yet techniques to fully recover and utilise these bioactive fractions remain underdeveloped. This study investigated the proteolytic transformation of two BSG types, wheat and stout BSG, during 10 days of fermentation with Lactiplantibacillus plantarum . Discovery and targeted LC-MS/MS proteomics were used to characterise the proteome, peptide release, and free amino acid profiles of BSG throughout fermentation. Proteomic analysis identified 503 proteins in wheat BSG and 340 in stout BSG. Wheat BSG generated higher peptide diversity than stout BSG (1,227 vs. 436 peptides, respectively), with peptide release …