Digital Commons Network^™

Preferred Plants And Nectar Collecting Times For Honey Production, David Macfawn, Jennifer M.K. O'Keefe, Sophie Warny, Carol Wymer, June Rampy Ponder

Clemson Extension Publishing

This book addresses three important questions for South Carolina beekeepers – which plants are bees in South Carolina using for nectar forage, when bees collect nectar from those plants, and how can understanding nectar foraging habits inform beekeepers as they work to gather specific types of premium honey? In 2021, the South Carolina Beekeeper’s Association, led by David MacFawn, designed and implemented a statewide pollen study, the first in any state in over fifty years, to answer these questions. Informed by data gathered from 19 apiaries across the state, this book contains the results of that study, including large-scale melissopalynological …

Investing Hysteresis In Floodplain Dynamics Of Lakes In The Middle St. Johns River Using Sentinel-1 Sar Imagery, Keenan Hubbard

Doctoral Dissertations and Master's Theses

Floodplain dynamics are often complex, with hysteresis potentially affecting the temporal relationship between flood stage and flood extent during subsequent inundation phases. This study leverages Sentinel-1 synthetic aperture radar (SAR) imagery to map flood extent in the Middle St. Johns River Lake floodplains and examine the presence of hysteresis during flood events. SAR scenes corresponding to river gauge readings were analyzed from the rising and falling limbs of a flood hydrograph. By comparing these flood maps, we assess differences in inundated areas at equivalent water levels during each stage of the flood event. The findings aim to enhance flood monitoring …

Reaction Control Mechanism In Deoxyuridine 5'-Triphosphate Nucleotidohydrolase, Aaron Delay

School of Biological Sciences: Dissertations, Theses, and Student Research

Deoxyuridine 5'-triphosphate nucleotidohydrolase (dUTPase) is an enzyme involved in the pyrimidine biosynthesis pathway, a key component of cellular DNA metabolism. It regulates intracellular uracil carrying triphosphate levels by hydrolyzing dUTP, thereby providing a substrate for thymidylate synthase (TS). The effective inhibition of dUTPase is expected to enhance TS-targeted chemotherapy by promoting thymine-less apoptosis.

Although the reaction mechanism of dUTPase has been studied, the human nuclear homotrimeric form remains complex, as all three subunits cooperatively form a single active site. As a result, the detailed molecular dynamics of its catalysis are still not fully understood. In this study, I investigated the …

Investigating Environmental And Socioeconomic Contributors To Adult Obesity In The Rio Grande Valley, John Nicholas Cauba, Jihoo Woo, Russel Wiggins, Shizue Mito

School of Medicine Publications

Obesity in the Rio Grande Valley (RGV) of Texas remains a critical public health concern, with rates (46.9%) significantly exceeding those of Texas (36%) and the U.S. (34%) (p < 0.001). This study used 2024 County Health Rankings data to analyze environmental and socioeconomic contributors to obesity across 240 Texas counties, with a population-weighted focus on Hidalgo, Cameron, Starr, and Willacy counties. The RGV exhibited markedly poorer access to exercise, higher rates of physical inactivity, lower Food Environment Index scores (FEI = 4.3 vs. 5.7 in Texas), higher rates of uninsurance, worse patient-to–primary care physician (PCP) ratios (2152:1 vs. Texas 1660:1), and increased preventable hospitalizations. Multiple linear regression identified physical inactivity (β = 0.6, p = 0.01) and access to exercise (β = −0.02, p = 0.02) as significant predictors of obesity. Notably, higher uninsured rates were associated with lower reported obesity, likely due to underdiagnosis in the absence of routine care. These findings emphasize the need for targeted interventions addressing food access, environmental and recreational infrastructure, along with healthcare infrastructure in the RGV, where socioeconomic disadvantage and structural barriers magnify the impact of national obesity trends on the regional level.

Mycetohabitans Rhizoxinica Bacteremia In The Setting Of Invasive Fungal Disease In An Immunocompromised Patient, Marisa Orbea, Mary Fortini, Megan H Amerson-Brown, Debra L Palazzi, James J Dunn

Faculty, Staff and Students Publications

Background: Mycetohabitans [Burkholderia] rhizoxinica is an endosymbiotic bacteria of Rhizopus microsporus that normally causes rice seedling blight. In our case report, we present one of the first known cases of concomitant bacteremia with M. rhizoxinica and invasive mold infection due to Rhizopus spp. in an immunocompromised child.

Case summary: A 3 year old male recently diagnosed with B-cell acute lymphoblastic leukemia developed febrile neutropenia. His workup was significant for invasive fungal sinusitis due to Exserohilum spp. based on histopathology and culture, a right middle lobe infiltrate, and a blood culture positive for gram-negative coccobacilli, later identified as M. …

A Phase 2 Trial Of Short-Term Intravenous N-Acetylcysteine In Biliary Atresia After Kasai Portoenterostomy, Sanjiv Harpavat, Kristin A Borovsky, Michael E Scheurer, Laurel Cavallo, Franca E Erhiawarie, Sanjeev Vasudevan, Adam M Vogel, Dana Cerminara, Elizabeth M Tessier, Kalyani R Patel, Sridevi Devaraj, Benjamin L Shneider

Center for Medical Ethics and Health Policy Staff Publications

Background: For infants with biliary atresia, the only treatment that can establish bile flow and delay need for liver transplant is the Kasai portoenterostomy (KP). Unfortunately, the KP has variable success. In this study, we hypothesized that intravenous N-acetylcysteine (IV NAC) treatment following KP would improve bile flow.

Methods: This was a phase 2 study following the two-stage "minimax" trial design. Participants received IV NAC (150 mg/kg/day) for 7 days after KP, and the primary endpoint was achieving total serum bile acids (TSBA) ≤10 μmol/L within 24 weeks of KP. Secondary endpoints were clinical markers and the occurrence of sentinel …

The Baeyya Poem Of Thul Rimmah: An Ecology Study, Theeb Mek'at Al-Otaypi

Journal of King Abdulaziz University: Arts and Humanities

This research analyzes a poem of Dhu Al-Rummah called Al-Ba'iyyah from the perspective of ecologicl criticism and seeks to detect the relationship of the text to the environment, and the poet's obsession with preserving it. It reveals the environmental space of the text and the appearance of the environment as an important part of the textual space and the internal structure of the text. Then the research tries to explore the characteristics of the place in the text because it is an important part of the environment, and the relationship of the place to the poet, and how the place …

Distribusi Kejadian Diare Pada Balita Dan Kualitas Sumber Air Minum Di Indonesia: Studi Ekologi, Nadia Z. Sabira, Naijla I. Shaliha, Sandrina H. Salsabila, Wellsa D. Kusumaningrum

Jurnal Nasional Kesehatan Lingkungan Global

Background: Diarrhea is an infectious disease with the third highest mortality rate in children under 5 years of age globally. The Indonesian Ministry of Health states that 88% of deaths from diarrhea in children are caused by poor sanitation practices and inadequate quality of drinking water sources. This study aims to describe the distribution of the quality of drinking water sources and the prevalence of diarrhea in all provinces in Indonesia. Methods: This study used an ecological study approach with secondary aggregate data from Survei Kesehatan Indonesia (SKI) 2023 and Studi Kualitas Air Minum Rumah Tangga (SKAM RT) 2020. The …

Diarrhea Risk Factors Of Toddlers In Jember District, 2022, Annisa Fitrah Aini, Yunus Ariyanto, Adistha Eka Noveyani

Preventia: The Indonesian Journal of Public Health

Diarrhea is a disease characterized by passing feces three or more times a day. The occurrence of diarrhea is also influenced by sociodemographic factors (nutritional status) and environmental factors (access to clean water, access to sanitary latrines, and living in flood-prone areas). The purpose of this research focuses on finding risk factors for diarrhea and mapping the risk factors of diarrhea. This study used an ecological study design, in which the population is all sub-districts in Jember. Secondary data were used in this research. The data were analyzed using statistical correlation analysis using SPSS and mapping using GIS software. The …

Environmental Related Variation In A Natural Grassland Of Rio Grande Do Sul, Brazil, V De P. Pillar, A.V A. Jacques, I I. Boldrini

IGC Proceedings (1977-2023)

Vegetation ecology studies help research efforts to improve natural grassland productivity by laying foundations for improvement techniques directed to benefit desired plant com­munities. Experiments reveal knowledge about the environ­mental conditions responsible for community structure and productivity, while surveys are a fast and cheap means for exploratory studies. In either case, data interpretation are helped by multivariate methods described by different authors, e.g., Orloci and Kenkel (1985). Our work is aimed to identify the environmental factors most responsible for vegetation variation in natural grasslands, locally known as « campos », and to formulate hypotheses about the effects of fertilization and grazing …

Physical And Chemical Characterization Of Recycled Glass Sand For Environmental Restoration, Shehbaz Ahmad, Julie P. Vanegas, Nicholas Borne, Natalia Butler, Toby Mendels, Leah A. Michaeloff, Diego Molina, Mary Salvaggio, Samantha Tamayo, Franziska Trautmann

Physics & Astronomy Faculty Publications

Introduction

We rely on coastal resources for food, water, and energy. However, over 75% of U.S. coastlines are eroding. Concurrently, the U.S. recycles less glass than other developed countries, landfilling hundreds of millions of tons every year. Recycled glass sand has many potential benefits over natural sand for combatting land loss; for example, it can be produced with controlled particle size to better resist erosion, making it an excellent—and underutilized—material for environmental restoration.

Objectives

This research compares the physical and chemical properties of recycled glass sand to natural sands (beach and dredge) from the U.S. Gulf Coast to assess environmental …

Predictive Modeling Of Colorectal Cancer Risk: Leveraging Health, Demographic, And Socioeconomic Factors For Targeted Screening, Anish Bhandari, Shawn Deng, Michael Olheiser, Robert Slater

SMU Data Science Review

Colorectal cancer (CRC) remains a significant public health concern, affecting millions in the United States and worldwide. This study investigates the risk factors associated with CRC using data from the Prostate, Lung, Colorectal, and Ovarian (PLCO) Cancer Screening Trial and aims to develop predictive models to identify high-risk individuals for targeted screening and increased awareness. The dataset integrates CRC incidence data from the National Cancer Institute with socioeconomic indicators from U.S. Census Bureau, linked by zip code. We employ Logistic Regression and Neural Network models to predict CRC risk, incorporating health, demographic, and socio-economic features. While the results suggest that …

Crayfish Microhabitats Provide A Close Association With Benthic Microbiomes To Support Cleaning Symbionts., Kyle J. Harris, John Hoverson, Matthew Becker, Matthew M. Cooke Mr

NEXUS: The Liberty Journal of Interdisciplinary Studies

Stream ecosystems promote variable microhabitats along a longitudinal gradient. These microhabitats support dynamic biotic assemblages. One such microhabitat in freshwater streams involves the external surface of crayfish. We investigated the microbiome of crayfish exoskeletons and the surrounding environment (water and substrate) in association with the presence and abundance of crayfish cleaning ectosymbionts (branchiobdellidans). These ectosymbionts actively consume the biofilm on crayfish as they live and reproduce in association with crayfish microhabitats. Sequenced microbes of the environment and crayfish were compared for dominant taxa. While the sample types (water, substrate, and crayfish) had significantly different microbiomes, there was not a significant …

"You Need To Make The Decision You Can Live With": An Observational Study Of Anti-Abortion Centers In Tampa Bay, Anna Broich

USF Tampa Graduate Theses and Dissertations

Anti-Abortion Centers (AACs) pose a grave threat to the reproductive health outcomes of Americans. Disguising themselves as licensed health clinics, AACs target vulnerable communities to prevent or delay abortion care through the spread of medical misinformation, contributing to abortion stigmatization. Situated in a state with a near-total abortion ban, this secret-shopper study aimed to understand the ways in which AACs in Tampa, Florida communicate anti-abortion rhetoric to pregnant people seeking abortions. Under the guise of people who suspect they are pregnant searching for abortion care, the main researcher and her assistants conducted the first phase of the study through 25 …

Recovery Of A Fly, A Louse, And Mites From A Rotting Ovenbird (Seiurus Aurocapilla) Carcass, Lawrence Hribar

Florida Field Naturalist

No abstract provided.

The Factors Affecting The Distribution Of Scorpions (Arachnida: Scorpions) In Iran, Hassan Nasirian

Chulalongkorn Medical Journal

Background: The distribution of scorpions is influenced by various factors that determine their presence and abundance in different regions. Understanding these factors is crucial for comprehending scorpion ecology and predicting their potential impact on ecosystems. Objective: These subtopics aim to provide an overview of the distribution of scorpions within Iran and the factors affecting their distribution, highlighting their ecological preferences and adaptations to different regions.

Methods: Forty-nine documents were collected from well-known indexing services, including Elsevier, Google Scholar, PubMed, ScienceDirect, Scopus, Springer, and Web of Science. After carefully studying the documents, they were classified into specific topics and discussed.

Results: …

Indigenous Cultural Healing In The Pacific Northwest: The Columbia River Tribes And The Potential Return Of The Falls, Cj Senn

University Honors Theses

This thesis examines the historical, cultural, and ecological significance of Celilo Falls (Wyam), a once-sacred Indigenous site on the Columbia River, and the profound impacts of its submergence by The Dalles Dam in 1957. It looks into the history of the area as well as the potential for a return of the falls in the future. Drawing from a mixed-methods approach that includes a systematic literature review and qualitative interviews with Indigenous scholars, elders, and community members, the study explores how the loss of Celilo Falls disrupted Indigenous governance, economies, and spiritual practices. It further investigates how Celilo continues to …

Analyzing Human - Nonhuman Primate Conflict Mitigation Techniques In Mto Wa Mbu, Northern Tanzania, Lil Adams

Undergraduate Theses, Capstones, and Recitals

Human-wildlife conflict is a widespread challenge faced by those living in regular contact with wildlife that can have profound impacts on livelihood outcomes for humans, wildlife, and their shared environment (Barua et al., 2013; Blackie, 2023). Human – non-human primate conflict is particularly crucial due to primates’ high capacity to live among human populations (Chapman & Chapman, 1990; Alberts & Altmann, 2006; Reader et al., 2011; Sinha & Vijayakrishnan, 2017), and is currently on the rise due to increasing contact between human and non-human primates (Hockings, 2016; Uddin et al., 2020). To characterize and analyze techniques currently being used to …

Irish Environmental Humanities, Emily Reiff

James Joyce Literary Supplement

No abstract provided.

Political Ecologies Of The Livestock Industry, Jecca Bowen

Electronic Theses and Dissertations

In the United States today, livestock production is dominated by an intensified, industrialized production paradigm whose growth in recent decades has utterly transformed the logistical realities and community impacts of animal agriculture. This dissertation investigates the effects of this production paradigm on livestock producers—whose decision-making is shaped by multi-scalar and often contradictory forces—as well as residents living near these large operations. To do so, I draw upon mixed-methods fieldwork, including in-depth interviews, spatial analysis, and field odor measurements in Weld and Morgan Counties in northern Colorado. I also use political ecologies of emotion, embodiment, and health to examine the complex …

Anthropogenic Litter In Freshwater Ecosystems: Effect On Ecosystem Processes And Spatial Distribution, Emily Johnson

Master's Theses

The rapid increase of plastic production and disposal into the environment has resulted in anthropogenic litter (i.e., trash; AL) becoming a global problem. In aquatic ecosystems, macro- and microplastics are long-lived, mobile, and interact with the physical and chemical components of aquatic ecosystems. Our objectives were to: (1) assess the impact of microplastic pollution on the ecosystem processes of ecosystem metabolism and N2 flux in an oligotrophic lake and (2) to assess the abundance and assemblage of anthropogenic litter in a large urban river. For objective (1), we added microplastics at a range of concentrations to littoral mesocosms. Ecosystem metabolism …

Race To The Bottom: Is Seabed Mining Worth The Cost?, Linda Nhon

GNSI Publications

There is a recent resurgence in seabed mining, particularly in the potential excavation of polymetallic nodules (PMN) for cobalt, nickel, and copper in response to the tight competition for critical minerals between the United States and China. From the 1970s to the 1980s, increased government funding in the seabed mining industry sparked a surge of academic research and international collaboration in deep-ocean exploration. Although not the sole driver of this ballooning interest, Project Azorian—the CIA’s audacious mission aboard the Glomar Explorer to recover the sunken Soviet nuclear submarine K-129—was undeniably catalytic in generating enthusiasm. Purportedly constructed by the aviation mogul …

How Does Climate Change Affect The Bird Migration Season And Number Of Bird Strikes?, Moe Myint Paing Soe, Justin Yan Yu Koh, Hong Kai Immanuel Quek, Fonzie Rey Raymundo Torres

Introduction to Research Methods RSCH 202

While it is wildly accepted that climate change has led to a shift in bird migration seasons and patterns, how does this change affect the occurrence of strikes between birds and aircraft? Analysing bird strike data from the FAA's Wildlife Strike Database and average annual temperature variations in the United States, we seek to find out if climate change has had an impact on bird strikes between 1990 and 2015 using multiple linear regression. Understanding the wider effects of climate change on the daily operation of aircraft would highlight if there were a need to update wildlife hazard management methods, …

Thinking About Complexity In Latin America: Contributions Of Neutrosophy In Dialogue With Edgar Morin, Noel Batista-Hernández, Maikel Yelandi Leyva-Vázquez, Alenna Rosa Batista-Barallobre

Neutrosophic Sets and Systems

Smarandache’s neutrosophic logic—and its broader philosophical umbrella of MultiAlism, which insists that any assertion must be considered together with its neutral and anti-assertive counterparts—offers powerful methodological tools to operationalize Edgar Morin’s complexity thinking. While Morin contributes the principles of dialogic, recursiveness and the hologrammatic approach, his continental framework can be difficult to apply empirically. Neutrosophy and MultiAlism formalize contradiction, uncertainty and multidimensionality, thereby bridging theory and practice. In Latin America, where complexity thinking is widely adopted to address realities marked by inequality and instability, this integration enables rigorous modelling of non-linear phenomena. Applications such as Neutrosophic QCA (NsQCA), Neutrosophic Cognitive …

The Distribution Of The Pentatomoidea In The Northeastern Quarter Of The United States (Hemiptera), J. E. Mcpherson

The Great Lakes Entomologist

The distributions of the pentatomoids occurring in the northeastern quarter of the United States as listed by Van Duzee in 1917 are updated.

Deprivation And Family-Level Determinants For Paediatric Dental Extractions Under General Anaesthetic: An Ecological Study, Joelle Booth, Martha Paisi, Robert Witton, Robert Nelder, G J Melendez-Torres

Peninsula Dental School

Introduction Extraction of carious teeth is one of the most common reasons children in England are admitted to hospital.Aims To identify whether the Index Of Multiple Deprivation (IMD) and family-level determinants are associated with the number of children requiring dental extractions under general anaesthetic (DGA) and the number of teeth extracted. A secondary aim was to determine whether family-level associations provide additional insight into DGA beyond the IMD alone.Methods An ecological analysis was conducted using service provider data (made available by Plymouth City Council) on the number of children (aged 0-16 years) who had a DGA and the number of …

Short Communication: Multiscale Topographic Complexity Analysis With Pytopocomplexity, L. S.-H. Lai, Adam Booth, A. R. Duvall, E. Herzig

Geology Faculty Publications and Presentations

TopoComplexity is a Python package designed for efficient and customizable quantification of topographic complexity using four advanced methods: two-dimensional continuous wavelet transform analysis, fractal dimension estimation, rugosity index, and terrain position index calculations. This package addresses the lack of open-source software for these advanced terrain analysis techniques essential for modern geomorphology and geohazard research, enhancing data comparison and reproducibility. By assessing topographic complexity across multiple spatial scales, pyTopoComplexity allows users to identify characteristic morphological scales of studied landforms. The software repository also includes a Jupyter Notebook that integrates components from the surface-process modeling platform Landlab (Hobley et al., 2017), facilitating …

When Trees Disappear: Understory Successional Implications Of Sudden Oak Death And High-Severity Wildfire In Big Sur, California, Sam J. Balthazard

Master's Theses

The rapidly emerging disease sudden oak death, caused by the non-native pathogen Phytophthora ramorum, is transforming coastal California forests by driving extensive mortality of tanoak (Notholithocarpus densiflorus) and increasing fire severity. As a novel disturbance, sudden oak death and its interaction with wildfire may catalyze unexpected shifts in successional trajectories and reconfigure forest understory communities. Furthermore, how tanoak influences the forest understory and how its decline might reshape understory dynamics remain poorly understood. We hypothesize that disease alone and the compounding disturbances of disease and wildfire alter successional dynamics, and that the potential functional extinction of N. …

Comparing The Effectiveness Of Low Impact Image Analysis To Traditional Vegetation Sampling In A Branford Marsh, Peter T. Porrello

Master's Theses

The growing need for non-intrusive research methods has led to a surge in passive data collection, such as audio recorders, data loggers, and camera traps, in the ecological field. This improves the capacity to observe fragile habitats without causing any harm and gives researchers new perspectives on the natural world. A non-invasive cable camera system is suggested as a means of gathering data to lessen these ecological disruptions. By taking images of the salt marsh's surface, this technique will minimize plant destruction and lower CO2 emissions brought on by foot traffic through the marsh, whilst producing data that is on …

Assessment Of Contextualized Reinforcement Pathology In A Community Sample Of Young Adult Substance Users, Ángel García-Pérez, Alba González-Roz, Roberto Secades-Villa, Gema Aonso-Diego, Sara Weidberg, Jin H Yoon

Faculty, Staff and Student Publications

Background: Alcohol, tobacco, and cannabis are the most commonly used substances among young populations, often leading to polysubstance use, which correlates with problematic consumption and adverse health outcomes. The contextualized reinforcer pathology (CRP) model explains addictive behaviors through several constructs, including the following: drug demand, delay discounting (DD), and substance-free and substance-related reinforcement. Most previous studies have focused on a single CRP construct and the couse of only two substances. This study aimed to characterize three subgroups of young adults reporting past month use of alcohol only, alcohol + tobacco or cannabis, and alcohol + tobacco + cannabis, in terms …