Digital Commons Network^™

Critical Review And Stratified Meta-Analysis Of Lung Cancer Risk In Petroleum Refinery Workers, Sherman Selix

Public Health Theses

Several publications have proposed a workplace risk of lung cancer in petroleum refineries, with asbestos as the potential agent. To examine the associations between petroleum refinery work and lung cancer related to occupational asbestos exposure, in addition to smoking and other concurrent occupational exposures, a systematic review and stratified meta-analysis was employed. Cochrane-Mantel-Haenszel statistics were used to combine SMR/SIR data separately for all male and female refinery workers, as well as SMR/SIR and RR/OR measurements for the subset of male maintenance workers, who were exposed to higher levels. Of 219 studies identified in the literature search, 78 studies were selected …

A Mathematical Investigation Of The Drivers Of Lyme Disease Ecology At Two Ecologically Contrasting Sites, Malia Joy Carpio

Public Health Theses

INTRODUCTION: Lyme disease is an emerging tick-borne disease of increasing concern in the United States. In order to create and to implement effective public health interventions for Lyme disease, there must be a better understanding of the factors driving pathogen transmission.

OBJECTIVES: The primary objectives of this study were to determine how presence/absence of “super-spreaders” and observed differences between two ecologically contrasting sites influence Borrelia burgdorferi transmission.

METHODS: A next generation matrix R0 model was parameterized with field data from an island site (Block Island, Rhode Island) and a mainland site (Connecticut) in order to generate R0 estimates. A local …

Gleaning In The Cedar Valley: A Post-Evaluation Study, Dylan Thomas Hillyer

Honors Program Theses

Gleaning is a term describing the act of either picking, cleaning or sorting produce that would otherwise be wasted. It is a practice long known to Europe, and in the past thirty years has gained immense popularity among non-profit organizations throughout the United States. The Cedar Valley Gleaning Program (CVGP) had its pilot-year in the fall of 2014. This thesis seeks to improve the efficacy of the CVGP through examining both the pilot year, and a qualitative study of gleaning operations worldwide, to answer the question: How can gleaning become an effective tool for communities in the Cedar Valley.

Yet More Studies In Rio Grande Valley History, Milo Kearney, Anthony K. Knopp, Antonio Zavaleta, Thomas Daniel Knight

Studies in Rio Grande Valley Regional History Series

Frontera, a poem / Elvira Ardalani -- Strasbourg, Alsace, and Brownsville, Texas : ideal sister cities / Milo Kearney -- La concepción de la identidad fronteriza en Jovita Gonzalez y Adela Sloss de Vento / Laura Garza -- Cuando se fundo Matamoros? / Andres F. Cuellar -- The formation and early development of the Llano Grande / Maria Vallejo -- Doño Rosa Maria Hinojosa de Balli and her family : a lower Rio Grande Valley family in an Atlantic perspective / Thomas Daniel Knight -- Clarksville : a forgotten community on the Rio Grande / Jim Mills -- The last …

Intra- And Inter-Seasonal Variability Of Supra-Glacial 1 Streams And Lakes Over The West Greenland Ice Sheet 2 From High-Resolution Satellite Optical Data, Michael Gregory Brown

Dissertations and Theses

The Greenland ice sheet (GrIS) is one of the largest glacial ice masses on Earth, second only to the Antarctic ice sheet. The surface hydrology of the GrIS plays a crucial role on the surface energy and mass balance budgets of the ice sheet as a whole. Surface water, known as supra-glacial water, is seasonally found in the ablation zone and feeds the en-glacial and sub-glacial hydrological environments of the ice sheet. The spatial distribution of surface streams is poorly understood and their temporal variability is (to our knowledge) unknown. One of the reasons for the lack of knowledge on …

The Hazardous Effects Of Ship Scrapping And Recycling On Workers' Rights And The Environment, Maytee Gomez Salgueiro

Dissertations and Theses

No abstract provided.

2015-2016 Lynn University Academic Catalog, Lynn University

Academic Catalogs

No abstract provided.

Expanding Eco-Visualization: Sculpting Corn Production, Jennifer E. Figg

Theses and Dissertations

This dissertation expands upon the definition of eco-visualization artwork. EV was originally defined in 2006 by Tiffany Holmes as a way to display the real time consumption statistics of key environmental resources for the goal of promoting ecological literacy. I assert that the final forms of EV artworks are not necessarily dependent on technology, and can differ in terms of media used, in that they can be sculptural, video-based, or static two-dimensional forms that communicate interpreted environmental information. There are two main categories of EV: one that is predominantly screen-based and another that employs a variety of modes of representation …

Proof-Of-Concept Of Environmental Dna Tools For Atlantic Sturgeon Management, Jameson Hinkle

Theses and Dissertations

Abstract

The Atlantic Sturgeon (Acipenser oxyrinchus oxyrinchus, Mitchell) is an anadromous species that spawns in tidal freshwater rivers from Canada to Florida. Overfishing, river sedimentation and alteration of the river bottom have decreased Atlantic Sturgeon populations, and NOAA lists the species as endangered. Ecologists sometimes find it difficult to locate individuals of a species that is rare, endangered or invasive. The need for methods less invasive that can create more resolution of cryptic species presence is necessary. Environmental DNA (eDNA) is a non-invasive means of detecting rare, endangered, or invasive species by isolating nuclear or mitochondrial DNA (mtDNA) from the …

Long-Term Effects Of Land Cover Change On Fish Assemblage Structure In The Piedmont And Coastal Plain Regions Of Virginia, Samuel F. Stickley

Theses and Dissertations

Changes in land cover and fish assemblage structure were assessed across two spatial and temporal scales in the Piedmont and Coastal Plain regions of the Chesapeake Bay watershed in Virginia. A long-term, local study (1953 to 2014) on the Tuckahoe Creek watershed used digitized aerial photography and satellite images (Landsat 5 TM and Landsat 8 OLI/TIRS) to quantify land cover change for five nested catchments in 1953, 1990, and 2014. Instream fish collections from 1958, 1990, and 2014 were utilized to assess a variety of fish assemblage metrics for each of the five catchments, and analyses were performed to assess …

Evaluating The Oil Sands Reclamation Process: Assessing Policy Capacity And Stakeholder Access For Government And Non-Governmental Organizations Operating In Alberta’S Oil Sands, Tyler Patterson

Dissertations, Master's Theses and Master's Reports - Open

By employing interpretive policy analysis this thesis aims to assess, measure, and explain policy capacity for government and non-government organizations involved in reclaiming Alberta's oil sands. Using this type of analysis to assess policy capacity is a novel approach for understanding reclamation policy; and therefore, this research will provide a unique contribution to the literature surrounding reclamation policy. The oil sands region in northeast Alberta, Canada is an area of interest for a few reasons; primarily because of the vast reserves of bitumen and the environmental cost associated with developing this resource. An increase in global oil demand has established …

The Hydrosocial Costs Of High-Volume Hydraulic Fracturing: A Tale Of Two Counties In Michigan, Amanda Kreuze

Dissertations, Master's Theses and Master's Reports - Open

Although natural gas has been praised as a clean and abundant energy source, the varying impacts and uncertainties surrounding the process of extracting natural gas from unconventional sources, known as horizontal high-volume hydraulic fracturing (HVHF) or “fracking,” have raised important concerns. The practice of HVHF is expanding so quickly that the full impacts are not yet known. This thesis project, using a grounded theory methodological approach, explores the risks and benefits associated with HVHF as recognized by the residents of two Michigan counties, one that currently produces natural gas by HVHF (Crawford County) and one that does not (Barry County). …

The Role Of Hybridization And The United States Fish And Wildlife Service Biologists’ Discretion In The Implementation Of The Endangered Species Act, Jennifer F. Lind-Riehl

Dissertations, Master's Theses and Master's Reports - Open

The Endangered Species Act (ESA) requires that the “best available scientific and commercial data” be used to enable the protection of critically imperiled species from extinction and preserve biodiversity. However, the ESA does not provide specific guidance on how to apply this mandate. In addition, the interpretation of scientific data can be uncertain and controversial, particularly regarding species delineation and hybridization issues. US Fish and Wildlife Service (FWS) field biologists must decide what the best science is and how to interpret and apply it in their recommendations. As a result, FWS field biologists often have considerable discretion when it comes …

An Analysis Of China’S Biofuels Policy And Chinese Discourse On Land Acquisition For Biofuels In Africa, Xuna Yang

Dissertations, Master's Theses and Master's Reports - Open

China has recently undertaken a very ambitious biofuel production program. However due to a lack of arable land domestically, this program has necessitated the leasing of arable land elsewhere (e.g., in Africa). This thesis first conducts a policy analysis of China’s biofuel policy using a historical institutionalism ends-and-means framework. The analysis reveals the ways in which China achieves its biofuel production goals through adopting various levels of policy means. China’s success in biofuel development is partly due to its unique policy-making and policy-assessment system, which ensures that biofuel production goals can be met. The second chapter analyzes China’s discourse on …

Historical Framework To Explain Long-Term Coupled Human And Natural System Feedbacks: Application To A Multiple-Ownership Forest Landscape In The Northern Great Lakes Region, Usa, Michelle M. Steen-Adams, Nancy Langston, Mark D.O. Adams, David J. Mladenoff

Department of Social Sciences Publications

Current and future human and forest landscape conditions are influenced by the cumulative, unfolding history of social-ecological interactions. Examining past system responses, especially unintended consequences, can reveal valuable insights that promote learning and adaptation in forest policy and management. Temporal couplings are complex, however; they can be difficult to trace, characterize, and explain. We develop a framework that integrates environmental history into analysis of coupled human and natural systems (CHANS). Our study demonstrates how historical data and methods can help to explain temporal complexity of long-term CHANS feedbacks. We focus on two sources of temporal complexity: legacy effects and lagged …

Geog 140: Introduction To Human Geography—A Peer Review Of Teaching Project Inquiry Portfolio, Katherine Nashleanas

UNL Faculty Course Portfolios

Large lecture classes of 100 students or more present unique challenges to both teaching and learning. The common method of “delivery” by instructors is lecture, often augmented by a set of Power Point slides; and, while the research literature shows that this is the more traditional way of teaching, increasingly it is becoming apparent that this method of instruction often does not reach students in the way we hope and often assume (Harvard Magazine 2015). Most of the students populating these classes are born of the Digital Age and have different expectations for learning, requiring new approaches in the classroom …

Critique And Transformation: On The Hypothetical Nature Of Ecosystem Service Value And Its Neo-Marxist, Liberal And Pragmatist Criticisms, Andony P. Melathopoulos, Alex Stoner

Journal Articles

Ecosystem service valuation (ESV) attempts to transform the opposition of human economic necessity and ecological conservation by valuing the latter in terms of the services rendered by the former. However, despite a number of ESV-inspired sustainability initiatives since the 1990s, global ecological degradation continues to accelerate. This suggests that ESV has fallen far short of its goals of sustainable social transformation—a failure which has generated considerable criticism. This paper reviews three prominent lines of ESV criticism: 1) the neo-Marxist criticism, which emphasizes the “fictitious” character of ecosystem commodities; 2) the liberal criticism through Friedrich Hayek's concept “scientistic objectivism”; and 3) …

Bridging The Blue-Green Divide: The Role Of Environmental Ngos In Tackling Environmental Problems In Taiwan, Yttrium Sua

Pomona Senior Theses

This thesis attempts to provide a brief historical outline of the environmental movement in Taiwan and the unique political situation that has directly affected how the movement has progressed. Thereafter, it looks at some examples of environmental disputes that have occurred in recent years, paying special attention to the ways the environmental movement has interacted with the government. This provides the background to frame the analysis, which will shed light on the reasons for the current state of distrust and antagonistic interactions between the environmental movement and the government. Finally, the thesis evaluates whether such interactions with the government is …

The Effect Of Mulch And Watering On Tomato Yields And Potential For Adoption During The Dry Season In Nanjara Village, Tanzania, Emily A. Okal

Graduate Student Theses, Dissertations, & Professional Papers

No abstract provided.

Development Of 3-D Shear Wave Models Using A Multi-Objective Optimization Scheme, Lennox Emmanuel Thompson

Open Access Theses & Dissertations

Evidence of geologic activity still occurring in Rio Grande Rift (RGR) includes quaternary faulting, seismicity, and widening at a small rate. We map the crustal thickness and seismic velocity ratio to create crustal model cross sections that highlights the regional extension of the Southern Rio Grande Rift (SRGR). Specifically, we compute receiver functions and receiver function stacks for 147 USArray and previously collected data, and interpolate the crustal and velocity results using a kriging interpolation scheme. By incorporating gravity, magnetics, receiver functions, velocity models, and the interpretation of seismic reflection/refraction data, we produce a constrained crustal model that characterizes the …

Leadership For Social Change: Illuminating The Life Of Dr. Helen Caldicott, Leah Hanes

Antioch University Dissertations & Theses

This dissertation is a biographical study of the life of Dr. Helen Caldicott that details her life and work over the years from 1997 to 2014. The history of her significant role in the end of the Cold War and her influence in public opinion regarding nuclear power and nuclear arms has been well-documented through many books, films, and articles as well as her own autobiography up to this twenty-year-period. My study will help to fill the gap in her most recent life. In particular, I will explore the impact of her activism on society and her personal life in …

Nurturing The Aesthetic: Learning To Care For The Environment In A Waldorf School, Melissa A. Grella

Antioch University Dissertations & Theses

The purpose of the study was to explore the aesthetic foundation of the Waldorf pedagogy in order to understand how art and aesthetic experiences may develop care toward the environment. A form of humanistic education developed by Rudolf Steiner in the early twentieth century, Waldorf education is a learning model envisioned as a framework for moral education. Waldorf education is known for its intentional use of art and aesthetic experience as well as its focus on developmentally appropriate curriculum and teaching methods. As in other forms of holistic education, Waldorf educators focus on the head, heart and hand of every …

U.S. Climate Resilience Toolkit Road Test: Bridging The Data-Practice Divide A Summary Report By Antioch University New England Center For Climate Resilience And Community Preparedness April 2015, Abigail Abrash Walton Phd, Michael Simpson Ms, Marilyn Castriotta Ms

Faculty Articles

Antioch University’s Center for Climate Preparedness and Community Resilience developed an online Facilitated Community of Practice model (FCoP) to convene 29 end-user decision-makers, working with 25 Eastern United States coastal communities, to “road test” the U.S. Climate Resilience Toolkit. FCoP participants (e.g., planners, emergency preparedness and municipal administration personnel, natural resource specialists) represented communities from Norfolk, VA, to Rockland, ME. The project was designed to provide constructive feedback to federal agencies to inform the usability of the toolkit for local decision makers and planners. The project also was intended to contribute to two broader outcomes: 1. building resilience in Eastern …

Approximation Of Fire-Return Intervals With Point Samples In The Southern Range Of The Coast Redwood Forest, California, Usa, Gregory Jones, Will Russell

Faculty Publications, Environmental Studies

A legacy of past fires is evident in the form of blackened basal hollows found throughout the southern range of the coast redwood (Sequoia sempervirens [D. Don] Endl.) forest.  A deeper look reveals cambial scars dating back centuries, telling a story of low- to moderate-intensity fires that burned periodically across California’s Central Coast bioregion.  While attempts have been made to reconstruct the fire history of this forest type, estimates of the fire-return interval vary widely, and the relationship of the fire-return interval to varying cultural influences is not fully understood.  We analyzed 373 fire scars from 70 cross-sections removed from …

Investigation Of Microplastic Debris In Marine Surface Waters Using Different Sampling Methods, Saeed Seyed Sadri

Other Faculty of Science and Engineering Theses

‘Microplastics’ are pieces of plastic debris <5mm in diameter. They are introduced into the marine environment directly for example via release of small pieces of plastics used as abrasives and indirectly through the fragmentation of larger items. The European Marine Strategy Framework Directive 2008/56/EC (MSFD) regards microplastics as an emerging issue of concern and calls for more data on the quantity, distribution and composition of this debris. This thesis examines the amount, composition and distribution of buoyant microplastic debris in marine waters using different sampling devices and methodologies. To investigate the spatial distribution, abundance and composition of microplastic debris between nearshore and offshore marine subsurface waters a subset of samples from the Continuous Plankton Recorder (CPR) survey were examined. Abundance was generally higher in nearshore coastal waters than the offshore oceanic samples, with the highest mean concentrations observed in the UK’s coastal waters of the northeast Atlantic and the southern North Sea. To validate the accuracy of the presence/absence of microplastic debris reported in the Continuous Plankton Recorder (CPR) samples by analysts at the Sir Alister Hardy Foundation for Ocean Science (SAHFOS) a subset of data was formally analysed using Fourier Transform Infrared (FTIR) spectroscopy. This analysis indicated a good level of accuracy (~66%) in the ability of the SAHFOS’ analysts to detect visually microplastic fragments during their normal processing of plankton samples. To compare quantity and composition of buoyant microplastic debris collected by two different approaches (CPR vs. Manta net) samples were collected from a similar body of coastal waters. The results showed significantly higher abundance of microplastic in samples collected by the manta net per unit of distance but no significant difference once the results were standardised per cubic volume of water. To assess the susceptibility of each method to ‘procedural contamination’, repetitive controlled tests were conducted to quantify the amount and composition of contaminants before, during and after the sampling programme. In both methods the highest number of contaminants was found on the net and prior to the deployment to sea. The semi synthetic Rayon fibres were the most abundant type of contaminants in both cases. To compare the abundance and composition of buoyant plastic debris in estuarine waters according to daily and lunar tidal cycles a mensurative experiment was conducted in a macrotidal Estuary. Microplastics comprised 82% of the debris and there was a significant difference in size frequency distribution between the spring and neap tides with more fragments of larger size observed during spring tides. In conclusion, this study shows further evidence of the spatial heterogeneity of microplastic debris distribution in marine waters and therefore also highlights the need for more comparable data from different marine habitats using standardised methodologies.

Elucidating The Conservation Status Of Michigan's Red-Eared Slider (Trachemys Scripta Elegans): A Phylogeographic Approach, Patrick J. Terry

Master's Theses and Doctoral Dissertations

The geographic origin of Michigan’s Trachemys scripta elegans has been a contentious subject since its first description in 1934. At that time two explanations were proposed: 1) populations of T. s. elegans are native to Michigan and naturally expanded their range from Ohio and Indiana; or 2) populations are non-native and have been introduced by humans via the pet-trade from throughout the United States. To differentiate between these possibilities, I compare the genetic structure of six populations throughout Indiana, Michigan, and Ohio, using six microsatellite markers. No isolation-by-distance was detected and model-based statistics support two genetic clusters with five populations …

Numerical Simulation Of Cold Front-Related Hydrodynamics Of Wax Lake Delta, Qian Zhang

LSU Doctoral Dissertations

This study applies a three-dimensional numerical model ECOM-si to simulate the circulation in the Wax Lake delta under winter cold front conditions. This model uses real topography and bathymetry of the area to reproduce tides and the circulation between December 2012 and January 2013, which captures a total of seven cold front passages. The model results demonstrate that the circulation in the Wax Lake delta area is significantly affected by the winter cold fronts. The major findings are: (1) Water fluxes in the delta distributary network are not solely propagated within the channels but also between the channels, indicating inundation …

A Lime Softening System For Individual-Household Use Powered By Solar Energy, Alexandria Slater-Williams

Electronic Theses and Dissertations 2010 - 2019

A study conducted by the World Health Organization and United Nations Children's Fund, concluded that approximately 768 million people worldwide are not receiving sanitary drinking water suitable for consumption. While there are many water treatment methods, lime softening proves to be one of the more effective approaches as it removes a wide variety of harmful compounds including arsenic, lead, mercury, and cadmium under the correct conditions. The greatest issues with lime softening on a smaller scale include the complexity of the chemistry and need for monitoring. By designing the system for groundwater sources and with a smaller capacity, this thesis …

The Green Edge Fund, Hillary Pan

The Synapse: Intercollegiate science magazine

No abstract provided.

Catalog Denison University 2015-2016

Denison University Catalogs

Denison University Course 2015-2016