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 Collection: UNT Theses and Dissertations
An entropic approach to the analysis of time series.

An entropic approach to the analysis of time series.

Date: December 2001
Creator: Scafetta, Nicola
Description: Statistical analysis of time series. With compelling arguments we show that the Diffusion Entropy Analysis (DEA) is the only method of the literature of the Science of Complexity that correctly determines the scaling hidden within a time series reflecting a Complex Process. The time series is thought of as a source of fluctuations, and the DEA is based on the Shannon entropy of the diffusion process generated by these fluctuations. All traditional methods of scaling analysis, instead, are based on the variance of this diffusion process. The variance methods detect the real scaling only if the Gaussian assumption holds true. We call H the scaling exponent detected by the variance methods and d the real scaling exponent. If the time series is characterized by Fractional Brownian Motion, we have H¹d and the scaling can be safely determined, in this case, by using the variance methods. If, on the contrary, the time series is characterized, for example, by Lévy statistics, H ¹ d and the variance methods cannot be used to detect the true scaling. Lévy walk yields the relation d=1/(3-2H). In the case of Lévy flights, the variance diverges and the exponent H cannot be determined, whereas the scaling d ...
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Entry Level Competencies for Recreational Sports Personnel as Identified by Chairs of Preparatory Institutions

Entry Level Competencies for Recreational Sports Personnel as Identified by Chairs of Preparatory Institutions

Date: May 1984
Creator: Jennings, Marion Wayne
Description: None
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Environmental Accounting: The Relationship Between Pollution Performance and Economic Performance in Oil and Gas Refineries

Environmental Accounting: The Relationship Between Pollution Performance and Economic Performance in Oil and Gas Refineries

Date: August 1997
Creator: Mobus, Janet Luft
Description: A research study is undertaken to determine if economic incentives exist for noncompliance with regulatory standards, and if accounting related disclosure of regulatory enforcement actions is a determinant of environmental performance.
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Environmental Correlates to Genetic Variation in the Coral Reef Fish, Thalassoma bifasciatum

Environmental Correlates to Genetic Variation in the Coral Reef Fish, Thalassoma bifasciatum

Date: December 1988
Creator: Pirkle, Michelle S.
Description: None
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Environmental Determinants and Choice of Project Evaluation Techniques in US and UK Firms

Environmental Determinants and Choice of Project Evaluation Techniques in US and UK Firms

Date: May 1996
Creator: Smolarski, Jan M. (Jan Mietek)
Description: The purpose of this dissertation is to develop a theory that helps explain the conditions under which firms select certain project evaluation techniques. This study uses contingency theory to analyze the impact of environmental uncertainty on the choice of project evaluation techniques. In addition to a direct measure of uncertainty, several dimensions of uncertainty are included in this study. These dimensions of uncertainty include control structure, method of financing, foreign assets, method of growth, and product domination. This study also analyzes the use of project evaluation, management science and risk management techniques in US firms over time and in UK firms over time in order to compare to prior research. A comparison of firms in the two countries are also provided. The primary method of data collection was a survey instrument. Data were also collected from annual reports and various other public sources. The variables that appear significant in the choice of project evaluation technique in US firms are environmental uncertainty, control structure, method of financing, foreign assets, and product domination. The variable that appear significant in the choice of project evaluation technique in UK firms is method of financing. US firms favor discounted cash flow techniques although this study ...
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Environmental Effect: Activator of the Psychotic Process

Environmental Effect: Activator of the Psychotic Process

Date: December 1984
Creator: Milam, Melody J.
Description: None
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An Environmental Evaluation and Public Opinion Survey Concerning Park and Recreation Development in Flower Mound, Texas

An Environmental Evaluation and Public Opinion Survey Concerning Park and Recreation Development in Flower Mound, Texas

Date: May 1985
Creator: Nelson, Thomas A.
Description: None
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Environmental Factors Influencing Chlorophyll-a Concentrations in Lake Texoma

Environmental Factors Influencing Chlorophyll-a Concentrations in Lake Texoma

Date: December 1998
Creator: Gibbs, Jennifer S. (Jennifer Sokolovic)
Description: An analysis of algal biomass measured by chlorophyll-a concentration in Lake Texoma was performed as a part of a monitoring program to develop baseline environmental data in order to detect the potential effects of engineered changes in chloride concentrations in the reservoir. This portion of the research project focused on two main research objectives. The first objective was evaluating the effect of sampling strategy on the ability to adequately reflect standing crop estimates and trends in algal biomass. Two sampling regimes utilizing replication of three versus ten samples were applied and then analyzed using a minimum detectable difference algorithm to determine the necessary magnitude of replication to represent the variation in the metric. Chlorophyll-a distribution was analyzed for zonation patterns expected in a river-run reservoir to establish the importance of representative sampling of river, transition and main lake zones of the reservoir for management decisions and trophic characterization.
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Environmental Imagination: the Constitution and Projection of a Sustainable Ethos

Environmental Imagination: the Constitution and Projection of a Sustainable Ethos

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Date: December 2014
Creator: Day, Philip Garrett
Description: This dissertation provides a theoretical analysis and examination of the role of imagination in the formation of an environmental ethos. The majority of ethical theories in environmental thought largely neglect the role that imagination plays in both the relationships that humans form with their environment, and the subsequent role that imagination plays in constituting the way that those relationships are understood ethically. To explore the role of imagination in constituting and subsequently projecting such an ethical way of being, this dissertation selectively analyzes the history of imagination in philosophy, cognitive science, and environmental thought. In addition, this dissertation also explores the role that images play in forming collective responses to environmental disasters, and the further role that imagination plays in overcoming the moral motivation gap.
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The Environmental is Political: Exploring the Geography of Environmental Justice

The Environmental is Political: Exploring the Geography of Environmental Justice

Date: August 2010
Creator: Mysak, Mark
Description: The dissertation is a philosophical approach to politicizing place and space, or environments broadly construed, that is motivated by three questions. How can geography be employed to analyze the spatialities of environmental justice? How do spatial concepts inform understandings of environmentalism? And, how can geography help overcome social/political philosophy's redistribution-recognition debate in a way that accounts for the multiscalar dimensions of environmental justice? Accordingly, the dissertation's objective is threefold. First, I develop a critical geography framework that explores the spatialities of environmental injustices as they pertain to economic marginalization across spaces of inequitable distribution, cultural subordination in places of misrecognition, and political exclusion from public places of deliberation and policy. Place and space are relationally constituted by intricate networks of social relations, cultural practices, socioecological flows, and political-economic processes, and I contend that urban and natural environments are best represented as "places-in-space." Second, I argue that spatial frameworks and environmental discourses interlock because conceptualizations of place and space affect how environments are perceived, serve as framing devices to identify environmental issues, and entail different solutions to problems. In the midst of demonstrating how the racialization of place upholds inequitable distributions of pollution burdens, I introduce notions of "social location" and ...
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