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Perturbation of renewal processes

Description: Renewal theory began development in the early 1940s, as the need for it in the industrial engineering sub-discipline operations research had risen. In time, the theory found applications in many stochastic processes. In this thesis I investigated the effect of seasonal effects on Poisson and non-Poisson renewal processes in the form of perturbations. It was determined that the statistical analysis methods developed at UNT Center for Nonlinear Science can be used to detect the effects of seasona… more
Date: May 2008
Creator: Akin, Osman Caglar
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Partner: UNT Libraries
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A Dynamic and Thermodynamic Approach to Complexity.

Description: The problem of establishing the correct approach to complexity is a very hot and crucial issue to which this dissertation gives some contributions. This dissertation considers two main possibilities, one, advocated by Tsallis and co-workers, setting the foundation of complexity on a generalized, non-extensive , form of thermodynamics, and another, proposed by the UNT Center for Nonlinear Science, on complexity as a new condition that, for physical systems, would be equivalent to a state of matt… more
Date: August 2003
Creator: Yang, Jin
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Partner: UNT Libraries
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Complexity as Aging Non-Poisson Renewal Processes

Description: The search for a satisfactory model for complexity, meant as an intermediate condition between total order and total disorder, is still subject of debate in the scientific community. In this dissertation the emergence of non-Poisson renewal processes in several complex systems is investigated. After reviewing the basics of renewal theory, another popular approach to complexity, called modulation, is introduced. I show how these two different approaches, given a suitable choice of the parameter … more
Date: May 2007
Creator: Bianco, Simone
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Explaining Juvenile Delinquency: A Test of Robert Agnew's General Strain Theory, Utilizing the National Longitudinal Study of Adolescent Health Data

Description: Strain theory has a long academic lineage for explaining criminal and deviant behavior from the classical writings of Emile Durkheim to the contemporary writings of Robert Agnew. The purpose of this research is to conduct an empirical test of Agnew's general strain theory utilizing Wave 1 data from the 1994-1996 National Longitudinal Study of Adolescent Health data (Add Health) (N = 6,503). Utilizing the Add Health data set represents a new attempt at empirically evaluating Agnew's theory. Scal… more
Date: December 2006
Creator: Gullion, John Gregory
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Model for Long-range Correlations in DNA Sequences

Description: We address the problem of the DNA sequences developing a "dynamical" method based on the assumption that the statistical properties of DNA paths are determined by the joint action of two processes, one deterministic, with long-range correlations, and the other random and delta correlated. The generator of the deterministic evolution is a nonlinear map, belonging to a class of maps recently tailored to mimic the processes of weak chaos responsible for the birth of anomalous diffusion. It is assu… more
Date: December 1996
Creator: Allegrini, Paolo
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Decoherence, Master Equation for Open Quantum Systems, and the Subordination Theory

Description: This thesis addresses the problem of a form of anomalous decoherence that sheds light into the spectroscopy of blinking quantum dots. The system studied is a two-state system, interacting with an external environment that has the effect of establishing an interaction between the two states, via a coherence generating coupling, called inphasing. The collisions with the environment produce also decoherence, named dephasing. Decoherence is interpreted as the entanglement of the coherent superposit… more
Date: August 2005
Creator: Giraldi, Filippo
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Partner: UNT Libraries
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Temporal Properties Of Dynamic Processes On Complex Networks

Description: Many social, biological and technological systems can be viewed as complex networks with a large number of interacting components. However despite recent advancements in network theory, a satisfactory description of dynamic processes arising in such cooperative systems is a subject of ongoing research. In this dissertation the emergence of dynamical complexity in networks of interacting stochastic oscillators is investigated. In particular I demonstrate that networks of two and three state stoc… more
Date: December 2011
Creator: Turalska, Malgorzata A.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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