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The Interwoven Dynamics Of Climate, Fire, Resilience And Orangutan Survival In Central Kalimantan’S Peat Swamp Forest, Putu Pujiantari
The Interwoven Dynamics Of Climate, Fire, Resilience And Orangutan Survival In Central Kalimantan’S Peat Swamp Forest, Putu Pujiantari
Graduate Theses and Dissertations
Tropical peat swamp forests are globally significant carbon reservoirs and biodiversity strongholds, yet they face escalating threats from climate change, fire, and anthropogenic disturbances. This dissertation investigates the interwoven dynamics of climate, fire, forest resilience, and orangutan survival in Central Kalimantan, Indonesia, a region which was transformed by the failed Mega Rice Project and recurrent catastrophic wildfires for decades. Using a multi-scale approach that integrates remote sensing time-series analysis (2001–2024),nlandscape-scale disturbance mapping (2005–2025), and fine-scale movement ecology, this research tests three core hypotheses: (1) moisture availability is the dominant climatic driver of wildfire activity, operating through non-linear thresholds; (2) post-fire …
Beyond Semantic Matching: Integrating Graph Structures, Boolean Logic, And Interactive Aggregation In Modern Retrieval, Quan Mai
Graduate Theses and Dissertations
Modern Natural Language Processing (NLP) and Information Retrieval (IR) systems have achieved remarkable success in semantic understanding; however, they continue to struggle with complex logical reasoning, structural interactions, and dynamic aggregation. This dissertation presents a comprehensive framework to enhance the structural, logical, and interactive capabilities of language models and retrieval systems across four progressive studies. First, we address the challenge of modeling dynamic conversational logic in online debates. We introduce a Sequence Graph Network (SGN) that captures the temporal and interactive exchange of ideas—such as counterarguments and reinforcements—by updating node features sequentially through a novel Sequence Graph Attention (SGA) layer. …
Soil Moisture Regime Effects On Greenhouse Gas Emissions In A Native Tallgrass Prairie In The Ozark Highlands, Thomas William Dockery
Soil Moisture Regime Effects On Greenhouse Gas Emissions In A Native Tallgrass Prairie In The Ozark Highlands, Thomas William Dockery
Graduate Theses and Dissertations
The Ozark Highlands is an ecoregion in the mid-southern portion of the United States that is characterized by a mosaic of tallgrass prairies, oak (Quercus spp.) savannas, and oak-hickory (Carya spp.) forests, which represents a unique biophysical transition zone between the relatively dry grasslands of the west and the humid forests of the southeast. Quantifying greenhouse gas (GHG) emissions, namely carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O), from natural, undisturbed ecosystems is critical to understanding atmospheric warming and climate-change implications. The objective of this study was to simultaneously evaluate CO2, CH4, and N2O emissions in an aquic and …
Alternative Methods To Improve Livestock Performance While Grazing Low-Quality Forages., Ivan Raynard Thomas Jr
Alternative Methods To Improve Livestock Performance While Grazing Low-Quality Forages., Ivan Raynard Thomas Jr
Graduate Theses and Dissertations
Stocker cattle producers in the southeastern part of the U.S. heavily depend on traditional forages such as bermudagrass [Cynodon dactylon] pastures during the warm season for grazing. Summer annual forages offer stocker cattle operations a valuable alternative source of forage. These forages have high yield potential and can help extend the grazing season. This is particularly beneficial during the summer months when traditional forage sources may be limited. Warm-season annual grasses may experience a decrease in crude protein concentrations during late summer and early fall. As a result, it may be necessary to find alternative sources of crude protein or …
Drawing Conclusions: Autonomy And Mental Maps In Denmark And The Faroe Islands, Erik Steven Breidinger
Drawing Conclusions: Autonomy And Mental Maps In Denmark And The Faroe Islands, Erik Steven Breidinger
Graduate Theses and Dissertations
This dissertation develops and tests a comparative heuristic device called optimal autonomy to explain when and how autonomous territories, or simply autonomies, become durable components of the global system of sovereign states. Drawing on a mixed‑methods case study of Denmark and the Faroe Islands, the study operationalizes optimal autonomy as a heuristic device using three interacting metrics: territorial delineation, national distinction, and state dependence. Using semi‑structured interviews with public officials and a mental‑mapping experiment with university students, this research shows that optimal autonomies are not made from single institutional designs but rather a dynamic equilibrium between maximal territorial delineation, medial …
Evaluation Of Metabolizable Energy And Phosphorus Availability In Conventional And Fractionated Dry-Grind Corn Co-Products For Poultry, Luke Parisi
Graduate Theses and Dissertations
The purpose of this research was to determine the availability of energy and phosphorous (P) in dry-grind corn co-products in chickens was assessed. In the first objective, the determination of energy availability, both a precision-fed rooster assay and an ad libitum fed broiler chicken assay were used in order to elucidate energy availability in corn co-products. There were 8 samples of corn fermented protein (CFP) and 2 samples of conventional distillers dried grains with solubles (CDDGS) evaluated for metabolizable energy (ME). The CFP contained a mean CP and crude fat of 55 and 3.7% (DM basis), respectively, compared with 30 …
Decoration Of Lactic Acid Bacterium By Exploiting In Vitro Sortase A Transpeptidase, Faisal Hamd Alqhtani
Decoration Of Lactic Acid Bacterium By Exploiting In Vitro Sortase A Transpeptidase, Faisal Hamd Alqhtani
Graduate Theses and Dissertations
Attaching a drug module to the surface of lactic acid bacteria was the main aim of this dissertation, and it was achieved. By using the Sortase A mechanism, the drug module (green fluorescent protein fused to the LPETG motif) was anchored to the LAB surface. To reach the final results, this dissertation will describe the process that I undertake to achieve the end goal. Modifying media, producing pure enzymes with less impurity, and reducing the protease activity in E. coli BL21 were all described in this five-chapter dissertation. Keywords: drug delivery, lactic acid bacteria, green fluorescent protein, sortase A, fusion …
Evaluation Of A High Protein Low Oligosaccharide Soybean Meal In Poultry Production, Kasey Matusik
Evaluation Of A High Protein Low Oligosaccharide Soybean Meal In Poultry Production, Kasey Matusik
Graduate Theses and Dissertations
The purpose of this study was to evaluate the influence of feeding a high protein, low oligosaccharide soybean meal to optimize poultry nutrition by the effects of feeding the soybean meal to roosters, broiler chickens, and turkeys. Two research objectives were evaluated to determine whether high protein, low oligosaccharide soybean meal would have increased nutritional value. The first objective assessed the metabolizable energy (ME) content of a high protein, low oligosaccharide soybean meal compared to a conventional soybean meal. Using roosters, broiler chickens, and turkey poults, three bioassays were conducted to evaluate the ME of the soybean meal. Results demonstrated …
In The Shadow Of The Steeple: A Theory Of Religious Hypocrisy, Justin Arthur Rice
In The Shadow Of The Steeple: A Theory Of Religious Hypocrisy, Justin Arthur Rice
Graduate Theses and Dissertations
In this dissertation, I explore how Christian doctrine and practice respond to the pressures placed upon them by the troubling reality of religious hypocrisy (RH). Assuming a teleological notion of social institutions, I argue that RH is best understood in relation to the Church as an institution, and that RH occurs when religious agents undermine or subvert their appointed role within the Church. RH consists in the conscious or unconscious charade of spiritual or moral virtue undertaken in one’s capacity as a member of a religious institution, grounded in a fundamental disparity between one’s thoughts, words, desires, motivations, or deeds, …
Corn Yield And Tissue-Potassium Response To Potassium Fertilization, Wyatt A. Rongey
Corn Yield And Tissue-Potassium Response To Potassium Fertilization, Wyatt A. Rongey
Graduate Theses and Dissertations
Potassium (K) deficiency is an increasingly important yield-limiting factor for irrigated corn (Zea mays L.) in Arkansas, where below optimum soil-test K (STK) acreage is increasing and visible K deficiencies or hidden K hunger threaten yield and profitability. Improving K management for modern, high-yielding hybrids require refining soil-test-based fertilizer recommendations and defining growth-stage-specific tissue-K sufficiency ranges that diagnose deficiency before irrecoverable yield loss occurs. This research aimed to i) quantify corn grain yield and yield component responses to K fertilization across a wide range of STK levels; ii) determine the frequency and magnitude of agronomically and economically meaningful yield responses …
Organic-Complexed Or Inorganic Trace Mineral Tub Supplementation: Impacts On Productivity And Reproductive Outcomes In Beef Cows And Heifers, Jacy Riddle
Graduate Theses and Dissertations
The objective of these experiments was to investigate the effects of organic-complexed or inorganic trace minerals (copper, cobalt, manganese, and zinc) on cow reproductive performance, suckling calf growth, as well as heifer development and reproductive outcomes utilizing free-choice tub supplementation. In lactating cows, treatments consisted of molasses-based tub supplementation containing either complexed or inorganic trace minerals, with an additional pre-breeding drench administered only to cows receiving complexed minerals. The drench contained complexed or organic copper, cobalt, manganese, and zinc. Supplementation began approximately 6 weeks prior to fixed-timed artificial insemination (FTAI) and continued until bull removal (d 105). In weaned replacement …
The Gravity Of The Ukraine War: Measuring Conflict Impacts On European Grain Trade, Stefan Bonchis
The Gravity Of The Ukraine War: Measuring Conflict Impacts On European Grain Trade, Stefan Bonchis
Graduate Theses and Dissertations
This thesis investigates the heterogeneous structural disruptions caused by the war in Ukraine on the European Union’s agricultural trade architecture, focusing on three critical commodities: wheat, maize, and sunflower seeds. Employing a structural gravity model framework across all 27 EU Member States, the study evaluates two conflict episodes, the 2014 Crimea annexation and the 2022 full-scale invasion, to identify the net beneficiaries and heavily impacted nations within the EU agricultural trade network. The empirical strategy utilizes a dual-test design to capture the full scope of the disruption. Test A (Ukraine towards the EU trade) reveals a distinct geographic logic in …
The Role Of Speculators In The Agricultural Futures Market And Their Impact On Prices, Clement Asamoah
The Role Of Speculators In The Agricultural Futures Market And Their Impact On Prices, Clement Asamoah
Graduate Theses and Dissertations
The study evaluates the impact of speculative activity on agricultural commodity returns, specifically in the corn, soybeans, rice, and oats markets. The study also analyzed the influence commodity returns have on speculative positions. Weekly data from the Commodity Futures Trading Commission were used as a proxy for speculative activity, and futures data were also retrieved from Barchart. Vector Autoregressive models and the Granger Causality tests were estimated to identify the relationships between returns and speculation. The paper found that speculative positions do not Granger-cause returns over the course of a week except for rice Tuesday results, which recorded a statistically …
“We Have The Right To Education”: Exploring Student Experiences, Disability Policy, And The Need For Culturally Refined Awareness Raising On Inclusive Higher Education Within The English-Speaking Caribbean, Kadesha Treco
Graduate Theses and Dissertations
Within the English-speaking Caribbean, research at the intersection of inclusive education policy and higher education (HIED) remains limited. Despite the ratification of the United Nations Convention on the Rights of Persons with Disabilities (2006) by countries across the region, the establishment of the CARICOM Special Rapporteur on Disabilities, and the creation of several pieces of national disability legislation, there is little evidence regarding the effectiveness of these initiatives at improving access to HIED. Therefore, this dissertation contributes to regional scholarship on inclusive education by examining how access to, and experiences within HIED institutions are shaped for students with disabilities. This …
Identifying Muscle Health Deficits Among Older Adults With And Without Cognitive Impairment, Ray Guerreros Urbina
Identifying Muscle Health Deficits Among Older Adults With And Without Cognitive Impairment, Ray Guerreros Urbina
Graduate Theses and Dissertations
Age-related declines in skeletal muscle health (SMH) and cognitive function are major contributors to disability, loss of independence, and reduced quality of life among older adults. Emerging evidence suggests that skeletal muscle and cognitive health may be interconnected through shared physiological mechanisms; however, the relationships between specific aspects of SMH and cognitive performance remain unclear. Therefore, the purpose of this study was to examine the relationships between SMH and cognitive performance among older adults and to determine whether SMH differs between cognitively healthy and cognitively impaired individuals after accounting for age and physical activity. A cross-sectional analysis was conducted using …
Ontogenetic Variation In Palatal Morphology In Tufted And Untufted Capuchins, Valerie Contreras
Ontogenetic Variation In Palatal Morphology In Tufted And Untufted Capuchins, Valerie Contreras
Graduate Theses and Dissertations
ABSTRACT Craniofacial variation and its relation to diet have been widely examined, but with less attention exclusively to the palate. Previous studies have shown that groups consuming a more resistant diet exhibit morphological differences in the craniofacial skeleton, including a longer and wider palate when compared to groups consuming a less resistant diet; similar patterns have been observed among captive vs. wild populations. Here, I present a 3D morphometric analysis of palatal ontogeny in tufted (Sapajus spp.) and untufted (Cebus spp.) capuchins and compare captive vs. free-ranging semi-provisioned Sapajus. Tufted capuchins are known to consume more mechanically resistant foods compared …
Valorization Of Rice Bran For Functional Film Fabrication Using Cold Plasma For Food Packaging And Biomedical Applications, Saydul Md Safwa
Valorization Of Rice Bran For Functional Film Fabrication Using Cold Plasma For Food Packaging And Biomedical Applications, Saydul Md Safwa
Graduate Theses and Dissertations
Abstract Over the past few years, conventional plastic packaging materials have become increasingly concerned with their environmental impact. Therefore, the demand for bioplastics has been increasing significantly over the years. Rice milling, a process that modifies paddy rice into edible rice, generates by-products such as rice bran. Rice bran has cellulose, hemicellulose, lignin, and protein, which makes it a potential material for bioplastic fabrication. However, like most biodegradable films, rice bran films fall short when it comes to practical packaging applications. They often lack the strength, flexibility, moisture resistance, and barrier performance needed to compete with synthetic plastics. Most importantly, …
Effects Of Soil Contamination On The Efficacy Of Antimicrobial Washes For Contaminated In-Shell Pecans, Erin Ramsay
Effects Of Soil Contamination On The Efficacy Of Antimicrobial Washes For Contaminated In-Shell Pecans, Erin Ramsay
Graduate Theses and Dissertations
A study was done to evaluate the survival of Shiga toxin-producing Escherichia coli (STEC) on directly and soil-inoculated in-shell pecans over a 28-day period, determine STEC reductions after treatment with individual and sequential antimicrobial washes on direct and soil-inoculated in-shell pecans, and determine the cross-contamination potential of the spent pecan washes after a treatment. Pecans were directly and soil-inoculated with an STEC cocktail (O157:H7, O157:NM, O121, and O26). Direct inoculation was achieved by spraying the STEC cocktail on the pecans and homogenizing by hand for 2 min. For the soil-inoculation method, autoclaved pecan tree orchard soil was sprayed with the …
Evaluation Of Loading, Release, And Bioavailability Of Resveratrol Encapsulated In Porous Starch, Yu-Yun Wang
Evaluation Of Loading, Release, And Bioavailability Of Resveratrol Encapsulated In Porous Starch, Yu-Yun Wang
Graduate Theses and Dissertations
Resveratrol (Res) is a polyphenolic compound found in grapes, red wine, and berries, with health benefits such as antioxidant, anti-inflammatory, and cardioprotective properties. The poor stability and bioaccessibility of Res after consumption by humans require the development of delivery systems. Among many delivery systems, porous starch (PS) is a safe, cost-effective, and high in adsorption capacity encapsulation material for drugs and bioactive compounds sensitive to environmental factors like light and heat. Porous rice, corn, and potato starch have different granule sizes, pore volumes, and surface areas. However, the impact of these encapsulation capabilities remains unclear among the three porous starches. …
Evaluation Of Thresholds For Adult Tarnished Plant Bug, Lygus Lineolaris (Beauvois), In Thryvon® Cotton, William Anderson Fletcher
Evaluation Of Thresholds For Adult Tarnished Plant Bug, Lygus Lineolaris (Beauvois), In Thryvon® Cotton, William Anderson Fletcher
Graduate Theses and Dissertations
Tarnished plant bug (TPB) is the most economically damaging insect pest of Mid-South cotton. TPB reduces yield is reduced by damaging squares, terminal growth, and small bolls, resulting in reduced yield. Currently, cotton grown in the Mid-South averages 1-6 insecticide applications per year for control of TPB. The introduction of ThryvOn® cotton technology provides a new management strategy for TPB control. ThryvOn® technology produces the Bacillus thuringiensis (Bt) protein Mpp51Aa2, which has insecticidal activity on TPB. A field study was conducted at five locations in 2024 and seven locations in 2025 across the Mid-South to evaluate different threshold levels for …
Univariate And Bivariate Binary Spatial Regression Models With Application To Plant Abundance Data, Amir Hamza Akash
Univariate And Bivariate Binary Spatial Regression Models With Application To Plant Abundance Data, Amir Hamza Akash
Graduate Theses and Dissertations
Analyzing species distributions is of prime interest in ecological research. Prevalence of a species usually depends on several environmental and topographic features not all of which can be quantified or measured. Spatial random effects play an important role as a surrogate for missing features that can explain similarity in species prevalence patterns between neighboring locations. In this thesis, we focus on a dataset on abundance of plants in the southern part of South Africa. First, we build a hierarchical Bayesian model for binary regression, using the probit link, on presence/ absence of a species based on available covariates. Since the …
Seasonality Of Bovine Respiratory Disease Incidence, Nasal Temperatures, And The Nasal Microbiome In Receiving Beef Cattle: Understanding The Risk Of The Bovine Respiratory Disease Complex, Robin Ashley Cheek
Graduate Theses and Dissertations
Bovine respiratory disease (BRD) has persistently been the leading cause of morbidity of beef cattle in the United States. Season has been directly associated with respiratory disease incidence and is likely a proxy for weather conditions, which vary by geographical location. The nose is one of the first points of contact between the outside environment and inside the body. The nasal microbiome and its relationship with BRD have been heavily studied within beef cattle, but there are not yet any studies to determine if the environment within the nasal cavity has a role to play in this mechanism. This dissertation …
Agritourism Marketing Communications: An Analysis Of Practices And Challenges In Arkansas, Kyla Paige Moseley
Agritourism Marketing Communications: An Analysis Of Practices And Challenges In Arkansas, Kyla Paige Moseley
Graduate Theses and Dissertations
Agritourism is seen as an avenue for operators as another channel of income, as well as a way for the visitors to learn about and experience agriculture. Marketing communication is needed by these operations to be visible to their communities. However, there is limited literature on agritourism marketing communications practices and challenges, especially in Arkansas, and on the use of word of mouth (WOM). This study aimed to fill that gap and provide practical recommendations to agritourism operators, extension offices, and the Arkansas Agritourism Association (ArAA) on how to better market operations. Using semi-structured interview questions, ArAA operators were asked …
Geospatial Science And The Changing Environment: Applied Methods For Sustainable Agriculture And Landscape Management, Harrison Wakefield Smith
Geospatial Science And The Changing Environment: Applied Methods For Sustainable Agriculture And Landscape Management, Harrison Wakefield Smith
Graduate Theses and Dissertations
Rapid environmental change is disrupting agricultural productivity, ecological function, and the long-term resilience of managed landscapes. At the same time, the rapid growth of geospatial data science has improved our understanding of environmental change and increasingly is being used to improve sustainability in agricultural and environmental management. However, critical gaps remain that limit the applicability of data-driven insights in landscape management. This dissertation investigates the potential of geospatial analytics for sustainable agriculture and landscape management, with a focus on applied methods that operate across spatial and temporal scales. Using field, landscape, regional, and national datasets, it explores the capabilities and …
The Environment, Health, And Vector Nexus: Evaluating The Spatiotemporal Variability And Societal Impact Of Ticks In Arkansas, Dalton Williams
The Environment, Health, And Vector Nexus: Evaluating The Spatiotemporal Variability And Societal Impact Of Ticks In Arkansas, Dalton Williams
Graduate Theses and Dissertations
Tick-borne diseases (TBDs) are a surging public health and veterinary concern in the United States. In states like Arkansas, climate change and shifting land use have recalibrated the ecological niches of vector species. This research utilizes species distribution and ecological niche modeling to assess the spatiotemporal suitability of ixodid tick habitats, specifically where environmental and socioeconomic factors intersect. By integrating spatial science with public health frameworks, this study identifies priority intervention areas in underserved rural regions where healthcare resources are often constrained. This study provides a comprehensive methodological framework, leveraging remote sensing datasets and historic disease data to delineate exposure …
No Place But Here, Dillon Bryant
No Place But Here, Dillon Bryant
Graduate Theses and Dissertations
The writing in this document is a dovetailing of fragments ranging from critical inquiry, analysis, scripts, and other observations that relate to the body of work in “No place but here”. It is an accompanying document attempting to enrich the visual work rather than a direct illustration. The installation of “No place but here” at the Rogers Creamery is an investigation utilizing collage, text, and other constructed photographs, images, and objects to play with and against familial and broader narratives of power, control, and ambiguity associated with the American West. Underpinned and intersected by interior questions revolving around artifice, connection, …
A Better Box To Lie In, Camille Gros
A Better Box To Lie In, Camille Gros
Graduate Theses and Dissertations
This written thesis accompanies an exhibition of textiles and works on paper that explore the emotional, architectural, and political structures that relay experiences of a Queer Southern livelihood; it is about girlhood, homoeroticism, isolation, passion, hunger, sweet love, and terrible fear. The show is a celebration of our dependance upon one another, and an expression of grief. I am sure that this work will need to be repaired in time, and I hope for many hands to mend it.
Assessing The Potential Of Taming Chicken Gut Commensal Bacteria Using Random Transposon Mutagenesis, Arjun Chapagain
Assessing The Potential Of Taming Chicken Gut Commensal Bacteria Using Random Transposon Mutagenesis, Arjun Chapagain
Graduate Theses and Dissertations
The chicken gut microbiome comprises hundreds of bacterial species whose functional roles remain largely unknown, in part because the tools needed to experimentally manipulate these organisms in their native community context have not been systematically developed or validated. This dissertation addresses the gap through three connected research chapters that progressively build a framework for transposon-based genetic delivery in the chicken cecal microbiome, moving from community-wide accessibility mapping to vector optimization to library preparation refinement. In Chapter 2, we established the community-level insertion landscape in chicken cecal metagenome using Himar transposon delivery via RP4 conjugation and aligned Tn-seq reads to a …
Investigating The Influence Of Dietary Phytogenics And Postbiotics On Horizontal Transmission Of Histomonas Meleagridis In Commercial Turkey Poult Hens, Diego Fernando Cortes Velez
Investigating The Influence Of Dietary Phytogenics And Postbiotics On Horizontal Transmission Of Histomonas Meleagridis In Commercial Turkey Poult Hens, Diego Fernando Cortes Velez
Graduate Theses and Dissertations
Histomonas meleagridis is a parabasalid protozoan and the causative agent of histomonosis, or blackhead disease, in turkeys. Withdrawal of the last remaining in-feed arsenical from the market in 2015 led to the re-emergence of the disease. As a result, there is a need to investigate alternatives, such as dietary inclusion of postbiotic and phytogenic compounds, to reduce H. meleagridis transmission and disease severity in commercial turkey flocks. The purpose of this project was to evaluate the influence of dietary inclusion of three different combinations of postbiotic and phytogenic compounds on H. meleagridis transmission in turkey poult hens. A thesis introduction …
Effects Of Wetting And Drying On Nutrient Mobilization In Aquatic Systems, Karessa Grace De La Paz
Effects Of Wetting And Drying On Nutrient Mobilization In Aquatic Systems, Karessa Grace De La Paz
Graduate Theses and Dissertations
Wetting and drying cycles are a fundamental, but underexplored, control on nutrient mobilization and transport in aquatic ecosystems. Such intermittency impacts approximately 60% of the world's streams and rivers, and the extent is expected to increase with future climate change. Additionally, aging reservoir infrastructure is driving restoration efforts, like large-scale drawdowns, that can expose benthic sediments to extended dry periods before refilling. Despite the prevalence of wet-dry cycles, how they influence nutrient transport and mobilization across different aquatic ecosystems remains poorly understood. To address this gap, this thesis presents two complementary studies exploring nutrient dynamics in Arkansas aquatic ecosystems that …