Digital Commons Network^™

Modification Of Culture Medium And Identification Of Microbial Contaminants For Improved In Vitro Propagation Of Freshwater Mussels, Raquel M. Wetzell

Theses and Dissertations

In vitro propagation efforts play an essential role in conserving and restoring threatened freshwater mussel populations by circumventing the need for a fish host. Across a broad range of taxa, transformation is induced with an artificial M199 medium and rabbit serum. However, such formulation may not be sufficient in culturing critical species with more specific physiological requirements. In this study, multiple serum mixtures were tested to improve in vitro transformation of two freshwater mussel species: yellow lampmussel (Lampsilis cariosa) and tidewater mucket (Atlantaconcha ochracea). These species were selected because they parasitize similar fish host species but …

Evaluating Population Genetic Structure And Potential Genomic Signals Of Natural Selection In A Migratory Songbird (Protonotaria Citrea), Tyler A. Hohenstein

Theses and Dissertations

In this study I attempted to further resolve the population genetic structure in the Prothonotary Warbler (Protonotaria citrea), and conducted an outlier SNP analysis and exploratory gene ontology analysis to investigate potential ongoing natural selection in the species. This analysis of population structure confirms previous work by DeSaix et al. (2019), where weak population structure was observed between eastern sites along the Atlantic Coastal Plain, and western sites in the Mississippi Alluvial Valley, possibly due to a genetic discontinuity across the Appalachian Mountains. I conducted two forms of outlier SNP analyses, a principal component analysis (PCA)-based approach to identify SNPs …

How Is Biophilic Urbanism Being Used In Planning To Rejuvenate Post-Industrial Cities?, Andrea A. Kerley

Theses and Dissertations

ARE POST-INDUSTRIAL CITIES USING BIOPHILIC URBANISM TO MERGE NATURE AND THE BUILT ENVIRONMENT? A PLAN EVALUATION OF FOUR U.S. LEGACY CITIES

By Andrea (Andi) Ames Kerley, Master in Urban and Regional Planning

A thesis submitted in partial fulfillment of the requirements for the degree of Master of Urban and Regional Planning, at Virginia Commonwealth University.

Virginia Commonwealth University, 2020.

Major Director: Megan Z. Gough, Associate Professor, L. Douglas Wilder School of Government and Public Affairs,

Urban and Regional Studies and Planning

The re-imaging of U.S. post-industrial cities from desolate, impoverished, and polluted areas to unique, equitable, and environmentally aware cities …

Placing Value On Environmental Literacy: A Case Study Of Biology Faculty Experiences, Ilene Sigrid Eberly

Theses and Dissertations

The purpose of this case study was to explore how contingent biology instructors place value on environmental literacy in their instruction and the instructional strategies used to foster their student's environmental literacy. This study also investigated the contextual experiences of contingent instructors influencing the value they place on environmental literacy. Participants included 11 faculty teaching introductory biology courses from two public universities in the Northeast. Our analysis focused on triangulation of participants semi-structured interviews, instructor-generated artifacts, and field notes from classroom observations, interviews, and artifacts. Findings revealed contingent biology instructors understand the importance of placing value on environmental literacy in …

Composition, Context, And Community Integration: Evaluating The Relative Strength Of Environmental Factors On Mental Health Outcomes Using A Social Ecology Model, Douglas John Archie Iii

Theses and Dissertations

The relationship between environmental factors and individual health outcomes has historically been a major area of interest for multiple scientific disciplines. However, the specific environmental factors relevant for describing this relationship and effective measuring methods are unclear. One approach that may assist in addressing these issues is by analyzing this relationship using a comprehensive theoretical framework. This study used a social-ecological model first proposed by Moos and colleagues (Insel & Moos, 1974: Moos & Moos, 1976) to investigate connections between environmental factors and mental health recovery outcomes of psychiatric distress, management of mental health symptoms, and recovery-oriented behavior. A series …

Unsupervised Learning For Anomaly Detection In Remote Sensing Imagery, Husam A. Alfergani

Theses and Dissertations

Landfill fire is a potential hazard of waste mismanagement, and could occur both on and below the surface of active and closed sites. Timely identification of temperature anomalies is critical in monitoring and detecting landfill fires, to issue warnings that can help extinguish fires at early stages. The overarching objective of this research is to demonstrate the applicability and advantages of remote sensing data, coupled with machine learning techniques, to identify landfill thermal states that can lead to fire, in the absence of onsite observations. This dissertation proposed unsupervised learning techniques, notably variational auto-encoders (VAEs), to identify temperature anomalies from …

Mississippi Teachers' Perceptions Of Environmental Education And Outdoor Instruction During A Covid-19 Pandemic, Kelisha Stamps

Theses and Dissertations

Environmental education (EE) and outdoor instruction are essential to understanding and addressing different environmental issues in school communities. This study investigated Mississippi teachers' perceptions on environmental education and outdoor instruction during 2020-2021. A state-wide survey and follow-up interview were conducted to examine their thoughts about environmental education and outdoor instruction and COVID-19 limitations in their classrooms and how that may affect their perceptions. Analysis was conducted using SPSS contingency and frequency tables, Chi-square Test of Independence, and content analysis of qualitative data. The results showed that Mississippi teacher participants believe that environmental education in Mississippi K-12 schools is very important …

Uptake, Acuumulation, And Toixicity Of Silver Nanoparticles To Juvenile Bivalve Mollusc’S Hard Clam Mercenaria Mercenaria, Hanaa Radhi Jolan Al Hameed

Theses and Dissertations

Nanoscience and nanotechnology have gained attention in the last 20 - 30 years. Manufactured nanoparticles (NPs), which are defined as having at least one dimension between 1 and 100 nm, are the main products of nanotechnology. Nanoscale materials often have novel properties due to their size and this has made them so attractive for a range of processes and sectors. These attractive properties have enhanced their use in a wide range of consumer products and applications including electronic, biomedical, and pharmaceutical. The overall objective of this dissertation was: 1) to investigate the transformation of well-characterized AgNPs, at environmentally relevant concentrations …

Quantifying The Impact Of Urbanization On The Fourche Creek Watershed, Little Rock, Arkansas, Zachary Smith

Theses and Dissertations

The Fourche Creek Watershed is an urban watershed in Central Arkansas, serving as the primary drainage basin for most of metropolitan Little Rock. As land surrounding streams is developed, the risk of negatively impacting water quality through the addition of contaminants like metals, sewage, and pesticides increases. The objective of this project is to introduce a novel method of quantifying the impact of urbanization on streams using a multi-pronged approach including mixing and spatial analyses, dissolved loads, and 87Sr/86Sr ratios throughout the Fourche Creek Watershed to discern specific contributions of baseflow and urban materials into the drainage basin. Generally, Coleman …

Interactive Expert System For Budgeting World Bank Consultancy Projects, Yosra Rafat

Theses and Dissertations

Cost estimating and forecasting are key components of the budgeting of any construction project. However, conventional approaches may result in uncertainty and usually do not utilize the organizational knowledge of past projects. Ideally, performing a cost estimation under the best predictions of the relevant future conditions, is the best approach of economic analysis to evaluate the optimum value for money. With the rise of Artificial Intelligence techniques, there are now several Machine Learning (ML) methods that are being studied to capitalize on accuracy gains with regards to cost estimating techniques to increase reliability during the tendering phase. This research aims …

More Than Stories: Indigenous Environmental Reciprocity In The Poetry Of Kathy Jetñil-Kijiner, Rebecca Purse

Theses and Dissertations

This thesis brings to the forefront the traditional stories Marshallese poet, performer, and climate change activist Kathy Jetñil-Kijiner shares in her published poetry. Indigenous studies scholars agree that Indigenous stories have power--power to change, power to inform, and power to heal. The traditional stories in Jetñil-Kijiner's poetry reveal the power of the environment and the potential relationships that can exist between humans and natural beings. While these traditional stories work to disrupt the narrative that Indigenous perspectives, knowledges, and cultures are somehow inferior to their colonial neighbors', they also assert the need for a return to environmental reciprocit--or the establishment …

Modified Biochar Adsorbents For Aqueous Contaminant Remediation, Herath Mudiyanselage Nimeshika Amali Herath

Theses and Dissertations

Continuous population growth and rapid industrial advancement and development have paved the way for ever increasing environmental pollution. At present, water pollution is a serious global issue that threatens environmental sustainability. The contamination of aquatic bodies with potentially toxic organic and inorganic substances are the result of world-wide anthropogenic activities. These pollutants can have detrimental health consequences on humans and ecosystems. Over the past decades, techniques such as chemical precipitation, ion-exchange, adsorption, membrane filtration, and electrocoagulation-flocculation have been developed and employed for the treatment of drinking and wastewater. Among the currently available techniques, pollutant removal by adsorption is most promising …

Experiential Education In The Writing Classroom: Developing Habits For Citizenship, Anika Shumway

Theses and Dissertations

As political polarity and social divisiveness increase in the United States, more organizations and scholars are calling on institutions of higher education to rise to the occasion and incorporate into their objectives the development of competent citizenship (The National Task Force). Writing classrooms are particularly suited to these kinds of objectives as writing already proposes relationships between rhetor and audience that have ethical dimensions and require mutual honesty, accountability, and respect (Duffy, "The Good Writer"). Additionally, the Framework for Success, a document that has become central to shaping the goals of writing classrooms, articulates habits of mind, like openness and …

Religion, Senses, And Remembrance: Brooklyn’S Sumter Club In Postbellum Charleston, S.C., Michael Edward Scott Emett

Theses and Dissertations

Civil War historians are slowly coming to realize the need to explicitly analyze the senses of those who lived in, and survived, the Civil War era. Although vision has reigned as the “supreme” sense, the nonvisual senses, with the help of historians of the senses, are becoming just as important to Civil War research. However, scholars are still unraveling the lived experiences of Civil War Era Americans and the perceptions and meanings these Americans gave to those experiences, with Northerners receiving comparatively little attention. To understand the world of antebellum and Civil War Americans, we should take them at their …

Pure And Fresh: A Typology Of Formal Garden Scenes From Private Eighteenth Dynasty Theban Tombs Prior To The Amarna Period, Jayme Rudolf Reichart

Theses and Dissertations

Gardens in ancient Egypt are known from the Early Dynastic Period to the Graeco-Roman Period from archaeological, textual, and pictorial evidence. From this evidence, one can differentiate between simple and formal gardens. This thesis exclusively produces a typology of the S- and Domain of Amun formal garden scenes (the xnty-S-, kAmw-, sS-, at-nt-xt-, and Hrrt-S-formal gardens) represented in the early to mid-late Eighteenth Dynasty Theban private tomb art prior to the Amarna Period (TT E2, TT 39, TT 63, TT 80, TT 81, TT 85, TT 87, TT 90, TT 93, TT 96, TT 100, TT 109, TT 161, and …

Searching For Gold: Using A Novel Land Cover Classification To Identify Multiscale Drivers Of Site Occupancy By A Flagship Species For Early-Successional Habitat Conservation, Baron Lin

Theses and Dissertations

Understanding habitat selection at multiple scales is an important step in guiding conservation programs and reversing species declines. This, however, is difficult for species that occupy early-successional habitats (ESH) due to a lack of accurate representation of shrub cover in publicly available land cover data. The Golden-winged Warbler (Vermivora chrysoptera; GWWA) is a threatened species of conservation concern and a flagship for ESH conservation. We used a novel, LIDAR-derived land cover classification that accurately identifies shrubs at a fine resolution (1m) to investigate how habitat composition and configuration influence GWWA site occupancy. We aggregated this same land cover …

Viva! Conexiones: A Community Center Celebrating Latinx Culture, Angie Thomson

Theses and Dissertations

A community center that will connect people of diverse backgrounds by promoting learning and understanding of the Latinx community through the arts and shared experiences.

Water Clarity At The River-Estuary Transition Zone: A Comparative Study Of The James, Mattaponi, And Pamunkey Sub-Estuaries, Rachel Henderson

Theses and Dissertations

Water clarity is a key parameter for monitoring water quality and often used to assess habitat suitability for submerged aquatic vegetation (SAV). Light attenuation, a measure of water clarity, is impacted by colored dissolved organic matter (CDOM), and by suspended particulates which include living and non-living components. We anticipated that the relative importance of these factors in regulating light attenuation would vary among the upper portions of three sub-estuaries differing in morphometry, hydrology, and degree of human influence. The James is characterized by eutrophic conditions and high algal abundance, whereas the Mattaponi and Pamunkey exhibit lower phytoplankton production. The Mattaponi …

Traffic Mitigation And Congestion In Ibadan, Oyo State Nigeria: Causes And Solutions, Adetoye Olusanmi Adeniyi

Theses and Dissertations

This dissertation focuses on how technology has transformed road traffic congestion between road users by examining the relationship between government, businesses, and road users through the application of traffic management in many cities in four regions of the world. It analyzes the connections between political decisions of traffic management, how users are made knowledgeable and the new modes of transportation as they relate to the roles of public and private users. The dissertation examines current literatures of twenty two (23) different countries: North America (United States of America and Canada), Europe (Poland, United Kingdom, Italy, Netherlands and Sweden), Asia (Russia, …

Characterizing Community-Level Size Spectra In Piedmont Streams Of Virginia (Usa), Giancarlo Racanelli

Theses and Dissertations

Many aquatic communities demonstrate an inverse scaling relationship between average body mass and density. Using quantitative samples of macroinvertebrates and fishes, we modeled this relationship in three Piedmont streams where little empirical research has been conducted. The size spectra (SS) method, in which individuals are identified by size, not taxonomic identity, was used with linear regression to model density as a function of mass. Fish and benthic invertebrate samples were collected on simultaneous days during September, then used to develop community-level SS models (combined fish and invertebrate data) for each stream. Invertebrate samples were also collected from each stream in …

A Spatiotemporal Assessment Of Fish Assemblage Response To Land-Use Change And The Evaluation Of Edna Metabarcoding For Describing Diverse Fish Communities, Timothy M. Owen

Theses and Dissertations

Fish assemblages are often assessed as a biological proxy for environmental health. While humans value healthy environments for the ecosystem services and recreational opportunities they provide, it is increasingly evident that such resources can be paradoxically degraded by anthropogenic activities. In this investigation, we studied the relationship between different intensities of anthropogenic land-use change and habitat-driven fish assemblage response across multiple spatiotemporal scales. Secondarily, we explored the efficacy of eDNA metabarcoding against conventional electrofishing techniques for the purpose of describing complete fish communities. This study was conducted in the Tuckahoe Creek basin near Richmond, Virginia. This James River tributary serves …

The Rurality Of Education: Best Practices To Improve The Quality And Accessibility Of Basic Education Service Delivery In The Rural Area Of Oke Ogun, Oyo State In Nigeria, Alice Jokodola

Theses and Dissertations

Nigeria’s educational system is riddled with issues and challenges, leading it to have the highest number of out-of-school children in the world. Not only have these issues and challenges led to a high number of out-of-school children, but it has also led to an increase in national poverty and illiteracy rates. Research points to the fact that these challenges result from a lack of quality and accessible basic education in Nigeria. It also indicates that rural areas are often the most vulnerable and affected when it comes to receiving quality and accessible education. This study focused on the rural area …

Gurethyesit Dhe Ndikimi I Tyre Ne Mjedis, Valmir Hazrolli

Theses and Dissertations

Edhe pse guroret dhe industritë e gurit përfaqësojnë një sektor të rëndësishëm industrial në Kosovë për sa i përket prodhimit dhe eksportet dhe duke përmirësuar kështu situatën ekonomike, këto operacione kanë ndikim të kundërt në mjedis dhe në njerëz shëndetin. Studimi i tanishëm zbuloi se grimcat e imëta (pluhuri) të prodhuara si rezultat i aktiviteteve të ndryshme që lidhen me të këto industri i shkaktojnë disa probleme mjedisit dhe njerëzve që jetojnë në zonë. Matjet e cilësisë së ajrit treguan se përqendrime të larta të grimcave të ndryshme janë në zonën e studimit. Në këtë drejtim, shumica e njerëzve konfirmuan …

Electro-Optic Satellite Constellation Design Using Multi-Objective Genetic Algorithm, Yasin Tamer

Theses and Dissertations

Satellite constellation design is a complex, highly constrained, and multidisciplinary problem. Unless optimization tools are used, tradeoffs must be conducted at the subsystem level resulting in feasible, but not necessarily optimal, system designs. As satellite technology advances, new methods to optimize the system objectives are developed. This study is based on the development of a representative regional remote sensing constellation design. This thesis analyses the design process of an electrooptic satellite constellation with regional coverage considerations using system-level optimization tools. A multi objective genetic algorithm method is used to optimize the constellation design by utilizing MATLAB and STK integration. Cost, …

Identifying Seasonal And Daily Variations In Arg-Containing Bioaerosols Generated During The Wastewater Treatment Process, Mirza Isanovic

Theses and Dissertations

Antibiotic resistance is a growing problem with the current global death count topping 700,000. In the United States alone there are 2.8 million antibiotic resistant bacterial (ARB) infections each year and approximately 35,000 deaths. If current trends continue the global ARB death count will reach 10 million surpassing current chronic disease deaths. Wastewater treatment plants play a vital role in protecting both the environment as well as local communities. The WWTP process allows for the removal of chemicals and contaminants from water that eventually makes its way back into the environment as well as into drinking water plants. Despite the …

The Effects Of Air Pollution On School Attendance In The United States, Debanhi G. Alrich

Theses and Dissertations

This study employs pooled OLS and fixed effect regressions to examine the effects of ambient air pollution on self-reported school attendance in the 423 most populous counties in the United States. Information from the U.S. Census’ American Community Survey’s annual estimate is compared against county-level data for 14 common air pollutant variables. When making this comparison for the general population, we find statistically significant results for only one pollutant: ozone. We find further significant effects for the presence of ozone when respondents are grouped by race/ethnicity and by poverty ratio, indicating that effects of pollution, like many other social ills, …

By Your Powers Combined: Heroic Solutions To Climate Catastrophes In The Fifth Season, Avengers: Infinity War, And Horizon: Zero Daw N, Kematat Matthew Medrala

Theses and Dissertations

Popular entertainment has become concerned with addressing issues of climate catastrophe in order to reflect the real concerns of its audience. Because these media narratives are produced by wealthy institutions that reach millions of people, it is vital to understand what these stories say about the causes of existential crises and their presented solutions. This thesis applies an ecocritical approach informed by environmental justice theorists and Marxist theory in order to analyze what a contemporary popular film, videogame, and novel have to say about addressing an oncoming ecological crisis. This analysis reveals that mass death among the disempowered is considered …

Temporal Discounting And Sustainable Behaviors, Natalia Piskorski

Theses and Dissertations

An experimental study was conducted (N = 175) to test for differences between thinking about the future and the present when it came to sustainable behavior and attitudes. Previous studies show temporal discounting can be overcome at least in the short term to alter current behaviors; however, there is a gap in the literature in regards to sustainable behaviors. This study used similar techniques to determine whether environmentally protective behavior can be altered by having an individual imagine themselves in the future. Participants were randomly assigned to one of three groups, a current other, current self, or a future-self group. …

The Relationship Between Place Attachment And Socioscientific Reasoning Among High School Students In Puerto Rico After Negotiation With Local And Foreign Socioscientific Issues, Lorraine Judith Ramírez Villarín

Theses and Dissertations

The purpose of this mixed-method study was to explore the relationship between place attachment and socioscientific reasoning (SSR) of Puerto Rican high school students through debate and discourse of local and foreign socioscientific issues (SSI). The specific research questions were, (1) what is the extent of the participants’ place attachment to the island of Puerto Rico, (2) are there differences in SSR between groups working with local and foreign SSI, (3) is there a correlation between place attachment and SSR, (4) are there differences in SSR between scenarios after SSI negotiation, and (5) do negotiation and discourse improve after SSI …

Impact Of Autoclaved Aerated Concrete (Aac) On Modern Constructions: A Case Study In The New Egyptian Administrative Capital, Esraa Ahmed Khalil

Theses and Dissertations

Building materials selection is critical for the sustainability of any project. The choice of building materials has a huge impact on the built environment and the cost of projects. Building materials emit huge amount of carbon dioxide (CO2) due to the use of cement as a basic component in the manufacturing process and as a binder which harm our environment. Energy consumption from buildings has increased in the last few years; a huge amount of energy is being wasted from using unsustainable building and finishing material as well as from the process of heating and cooling of buildings. In addition, …