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Articles 31 - 42 of 42
Full-Text Articles in Physical Sciences and Mathematics
Fielding Sustainability: The Potential For Compost Extract As An Amendment On Athletic Turfgrass, Lacy M. Adams
Fielding Sustainability: The Potential For Compost Extract As An Amendment On Athletic Turfgrass, Lacy M. Adams
Theses and Dissertations
Sustainability and green initiatives are being pushed across the country and the globe, but athletics are not seeing the same pressures as intensely. Golf courses are largely the only athletic arena that have received pressure and are beginning to implement more sustainable management practices. Agriculture is also making strides to use less chemicals through organic farming and improve soil health with cover crops. Meanwhile, the rest of the athletic world continues to contribute to soil compaction, chemical maintenance, and runoff all of which affect the quality of the local environment. The strides to improve athletics’ sustainability record can be seen …
Nature, Identity, And Pastoralism: Changing Landscapes And Shifting Paradigms In The Mongolian Taiga, Jessica Vinson
Nature, Identity, And Pastoralism: Changing Landscapes And Shifting Paradigms In The Mongolian Taiga, Jessica Vinson
Theses and Dissertations
The traditional environment of pastoralism is under assault from land degradation, rangeland conservation, and development paradigms that alter the everyday lives of Tsataan Dukha reindeer herders in the Mongolian taiga. This paper seeks to analyze the ways in which identity is shaped through experiences of or relationships with particular nonhuman places and beings, and how the Tsataan Dukha renegotiate their individual and collective identities with changing local landscapes that exert considerable pressures upon the social, political, and economic organization of Dukha life. Senses of place and of space are intimately tied to a sense of self, so disruption in environmental …
Analyzing The Efficiency Of Horizontal Photovoltaic Cells At Air Force Installations In Various Climate Regions, Parker A. Hines
Analyzing The Efficiency Of Horizontal Photovoltaic Cells At Air Force Installations In Various Climate Regions, Parker A. Hines
Theses and Dissertations
The U.S. Air Force relies heavily on electrically powered facilities to ensure mission-critical capabilities can be carried out. Without a resilient electrical system in place, the U.S. Air Force could be without power for extended periods, resulting in severe implications. Installing a photovoltaic array on an installation is one strategy to improve energy resiliency. The amount of power a photovoltaic array can produce is reliant on its geographical location, position and weather characteristics. This research presents the development of novel linear regression models based upon 14 case studies from global Department of Defense (DoD) installations to predict horizontal photovoltaic power …
Non-Intrusive Occupancy Detection Methods And Models, James C. Tyhurst
Non-Intrusive Occupancy Detection Methods And Models, James C. Tyhurst
Theses and Dissertations
Occupants in the built environment impact facility energy consumption and indoor air quality. Predicting the presence of occupants within the built environment can therefore be used to manage these factors while providing additional benefits in terms of emergency management and future space utilization. Detecting occupancy requires a combination of sensors and models to accurate assess data collected within facilities to predict occupancy. This thesis investigated occupancy detection through a non-invasive data collection sensors and model. Specifically, this thesis sought to answer two research questions examining the ability of a radial basis function to accurately predict occupancy when generated from data …
Nitrate Concentrations In Streams As A Function Of Crop Cover In Midwestern Agricultural Watersheds: Assessing The Role Of Corn And Soybeans, Jacob Tyler Piske
Nitrate Concentrations In Streams As A Function Of Crop Cover In Midwestern Agricultural Watersheds: Assessing The Role Of Corn And Soybeans, Jacob Tyler Piske
Theses and Dissertations
Increased availability and reduced cost of synthetic-nitrogen fertilizers have led to excess nitrogen being deposited in reservoirs. The accumulation of nitrogen (N) in reservoirs has negative effects, generating algal blooms, hypoxic zones, and poor drinking water quality. Corn and soybean utilize nitrogen at different rates, resulting in higher nitrogen fertilizer application to fields for corn than for soybean. This work examines whether the nitrate concentration in a stream may be correlated to the percentage of land devoted to growing corn or soybeans in the watershed. To investigate potential relationships, discharge (Q) and nitrate concentration data from ten USGS gauging stations …
Quantifying Permafrost Extent, Condition, And Degradation At Eielson Air Force Base, Theodore J. Labedz
Quantifying Permafrost Extent, Condition, And Degradation At Eielson Air Force Base, Theodore J. Labedz
Theses and Dissertations
The DoD is executing over $500M in military construction on Eielson Air Force Base (AFB) within the next three years. This construction program will expand the footprint of facilities and change parts of the storm water management scheme, which may have second order effects on the underlying permafrost layers. These changes in permafrost will drive engineering decision, and help shape the overall strategy for military readiness in the Arctic. Little site-specific knowledge exists on the human caused effects to permafrost at this location. In 2016, the permafrost degradation rates at Eielson AFB were modeled using the Geophysical Institute Permafrost Laboratory …
Modeling Power Output Of Horizontal Solar Panels Using Multivariate Linear Regression And Random Forest Machine Learning, Christil K. Pasion
Modeling Power Output Of Horizontal Solar Panels Using Multivariate Linear Regression And Random Forest Machine Learning, Christil K. Pasion
Theses and Dissertations
United States Air Force energy resiliency goals are aimed to increase renewable energy implementation among its facilities. Researchers at the Air Force Institute of Technology designed, manufactured, and distributed 37 photovoltaic test systems to Air Force installations around the world. This research uses two types of modeling techniques, multivariate linear regression and random forest machine learning, to determine which technique will better predict power output for horizontal solar panels. Many previous solar panel prediction studies use solar irradiation data as an input. This study does not use irradiation as an input and aims to predict power output with input variables …
Virus Adsorption To Colloids In Water: Interactions Between Bacteriophage Ms2, Kaolinite, And Fiberglass, Ashlee N. Ellis
Virus Adsorption To Colloids In Water: Interactions Between Bacteriophage Ms2, Kaolinite, And Fiberglass, Ashlee N. Ellis
Theses and Dissertations
Virus adsorption to colloidal particles is an important issue in the water quality community, and it is a particularly important issue for conventional wastewater treatment plants that accept biohazardous waste. Colloids impact the transport of viruses in engineered treatment systems, and they also provide protection against oxidants and other destructive mechanisms. This study evaluated the adsorption of bacteriophage MS2 to colloidal suspensions of kaolinite (KAO) and fiberglass (FG). A series of laboratory batch tests were carried out over a range of experimental conditions to determine kinetic rate constants and characterize bond strength, and computational experiments were done to assess both …
An Analysis Of Built Environment Factors In Residences And The Associated Effects On Mental Health Symptoms Of United States Veterans, Cody J. Beemer
An Analysis Of Built Environment Factors In Residences And The Associated Effects On Mental Health Symptoms Of United States Veterans, Cody J. Beemer
Theses and Dissertations
Current awareness and statistics regarding negative mental health outcomes of United States Military and Veteran populations justify research into causes and methods to assist those afflicted. Growing academic research indicates connections between the built environment and the mental health of its occupants may be important. This research is intended to explore this relationship with a Veteran study group. Through the completion of a literature review, key built environment factors associated with various mental health conditions were identified. Mechanisms and pathways through which these factors can affect mental health conditions were explored. An analysis of residential built environment factors and Veteran …
A Life Cycle Analysis Of Dod Expeditionary Waste Management Practices Using Simapro, David J. Chester
A Life Cycle Analysis Of Dod Expeditionary Waste Management Practices Using Simapro, David J. Chester
Theses and Dissertations
The United States (US) Department of Defense (DoD) is investigating improved municipal solid waste (MSW) management techniques. Current techniques tax already limited land and energy resources at contingency bases and impart additional logistical support requirements and personnel commitments. Seeking a solution to this growing problem, the DoD is investigating waste-to-energy (WTE) systems to reduce the volume of hazardous and non-hazardous solid wastes while generating low emissions. The current barriers to the acquisition and utilization of viable WTE technologies are the high capital and operating and maintenance (O&M) costs. Using the Life-Cycle Analysis (LCA) software SimaPro, the human health, environmental quality, …
Toxicological Life Cycle Impact Analysis Of Short And Long Chain Perfluorinated Compounds Compared To Impacts Of Treatment Techniques, Joshua R. Glass
Toxicological Life Cycle Impact Analysis Of Short And Long Chain Perfluorinated Compounds Compared To Impacts Of Treatment Techniques, Joshua R. Glass
Theses and Dissertations
Polyfluoroalkyl substances (PFAS) are man-made substances that are used as surfactants in industrial processes and commercial products most notably for the Air Force in aqueous film-forming foam. These compounds were introduced in the 1950s and have since become pervasive throughout industrial and consumer products such as carpet, leather, and paper as well as textiles that repel water, grease, and oils. As the presence of PFAS continues to grow, so do concerns for the toxicological impacts of exposure to these chemicals. Although there is much research into the toxicological impacts of PFAS, there are no regulatory treatment levels within the United …
Evaluation Of Private Landowner Intention To Create Early Successional Habitat In Virginia's Appalachian Region, Hannah M. Coovert
Evaluation Of Private Landowner Intention To Create Early Successional Habitat In Virginia's Appalachian Region, Hannah M. Coovert
Theses and Dissertations
As human land uses continue to expand rapidly across the landscape, the management practices of private landowners are an essential part of effective conservation of biodiversity. Conservation of early successional habitats (ESH) and the species that depend on them is a priority in the eastern United States, and efforts to create more ESH on private lands has primarily focused on forest landowners and the harvesting of timber. Private lands with significant pasture cover in a forested landscape present an additional opportunity to create and maintain ESH, yet our understanding of landowner values and attitudes about management strategies in pastures (i.e., …