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Complexity synchronization: a measure of interaction between the brain, heart and lungs

Description: Authors of the article address the measurable consequences of the network effect (NE) on time series generated by different parts of the brain, heart, and lung organ-networks (ONs), which are directly related to their inter-network and intra-network interactions. The authors assert that these same physiologic ONs have been shown to generate crucial event (CE) time series, and herein are shown ,using modified diffusion entropy analysis (MDEA) to have scaling indices with quasiperiodic changes in… more
Date: July 15, 2023
Creator: Mahmoodi, Korosh; Kerick, Scott E.; Grigolini, Paolo; Franaszczuk, Piotr J. & West, Bruce J.
Item Type: Refine your search to only Article
Partner: UNT College of Science
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Information and Self-Organization in Complex Networks

Description: Networks that self-organize in response to information are one of the most central studies in complex systems theory. A new time series analysis tool for studying self-organizing systems is developed and demonstrated. This method is applied to interacting complex swarms to explore the connection between information transport and group size, providing evidence for Dunbar's numbers having a foundation in network dynamics. A complex network model of information spread is developed. This network in… more
Date: December 2021
Creator: Culbreth, Garland
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Modeling for Process Control: High-Dimensional Systems

Description: Most of other technologically important systems (among them, powders and other granular systems) are intrinsically nonlinear. This project is focused on building the dynamical models for granular systems as a prototype for nonlinear high-dimensional systems exhibiting complex non-equilibrium phenomena. Granular materials present a unique opportunity to study these issues in a technologically important and yet fundamentally interesting setting. Granular systems exhibit a rich variety of regimes … more
Date: September 15, 2008
Creator: Tsimring, Lev S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Nonlinear Dynamics and Control of Large Arrays of Coupled Oscillators: Application to Fluid-Elastic Problems

Description: Large numbers of fluid elastic structures are part of many power plant systems and vibration of these systems sometimes are responsible for plant shut downs. Earlier research at Cornell in this area had centered on nonlinear dynamics of fluid-elastic systems with low degrees of freedom. The focus of current research is the study of the dynamics of thousands of closely arrayed structures in a cross flow under both fluid and impact forces. This research is relevant to two areas: (1) First, fluid-… more
Date: April 1, 2002
Creator: Moon, Francis C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Dynamics of Granular Materials and Particle-Laden Flows

Description: Rapid granular flows and particle-laden flows were studied in laboratory experiments, molecular dynamics simulations, and simulations of continuum equations. The research demonstrated that the inclusion of friction is crucial in realistic modeling of granular flows; hence extensive previous analyses and simulations by many researchers for frictionless particles must be reconsidered in the light of our work. We also made the first detailed comparison between experiment and the predictions of con… more
Date: July 11, 2007
Creator: Swinney, Harry L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Dynamics of Granular Materials and Particle-Laden Flows

Description: Rapid granular flows and particle-laden flows were studied in laboratory experiments, molecular dynamics simulations, and simulations of continuum equations. The research demonstrated that the inclusion of friction is crucial in realistic modeling of granular flows; hence extensive previous analyses and simulations by many researchers for frictionless particles must be reconsidered in the light of our work.
Date: April 18, 2007
Creator: Swinney, Harry L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

LOW HORIZONTAL BETA FUNCTION IN LONG STRAIGHTS OF THE NSLS-II LATTICE

Description: The NSLS-II storage ring lattice is comprised of 30 DBA cells arranged in 15 superperiods. There are 15 long straight sections (9.3m) for injection, RF and insertion devices and 15 short straights (6.6m) for insertion devices. In the baseline lattice, the short straights have small horizontal and vertical beta functions but the long straights have large horizontal beta function optimized for injection. In this paper, we explore the possibility of maintaining three long straights with large hori… more
Date: March 28, 2011
Creator: Fanglei, L.; Bengtsson, J.; Guo, W.; Krinsky, S.; Li, Y. & Yang, L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Sliding and Rocking of Unanchored Components and Structures: Chapter 7.6 ASCE 4 Revision 2

Description: Chapter 7.6 of ASCE 4-Rev 2, Seismic Analysis of Safety-Related Nuclear Structures: Standard and Commentary, provides updated guidance for analysis of rocking and sliding of unanchored structures and components subjected to seismic load. This guidance includes provisions both for simplified approximate energy-based approaches, and for detailed probabilistic time history analysis using nonlinear methods. Factors to be applied to the analytical results are also provided with the intent of ensurin… more
Date: April 1, 2011
Creator: Jensen, S. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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ADVANCED METHODS FOR THE COMPUTATION OF PARTICLE BEAM TRANSPORT AND THE COMPUTATION OF ELECTROMAGNETIC FIELDS AND MULTIPARTICLE PHENOMENA

Description: Since 1980, under the grant DEFG02-96ER40949, the Department of Energy has supported the educational and research work of the University of Maryland Dynamical Systems and Accelerator Theory (DSAT) Group. The primary focus of this educational/research group has been on the computation and analysis of charged-particle beam transport using Lie algebraic methods, and on advanced methods for the computation of electromagnetic fields and multiparticle phenomena. This Final Report summarizes the accom… more
Date: August 31, 2012
Creator: Dragt, Alex J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Stability and Dynamics of Spatio-Temporal Structures

Description: This document constitutes the final report for the grant. It provides a complete list of publications and presentations that arose from the project as well as a brief description of the highlights of the research results. The research funded by this grant has provided insights into the spontaneous formation of structures of increasing complexity in systems driven far from thermodynamic equilibrium. A classic example of such a system is thermally driven convection in a horizontal fluid layer. Hi… more
Date: October 21, 2005
Creator: Riecke, Hermann
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
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A Cumulant-based Analysis of Nonlinear Magnetospheric Dynamics

Description: Understanding magnetospheric dynamics and predicting future behavior of the magnetosphere is of great practical interest because it could potentially help to avert catastrophic loss of power and communications. In order to build good predictive models it is necessary to understand the most critical nonlinear dependencies among observed plasma and electromagnetic field variables in the coupled solar wind/magnetosphere system. In this work, we apply a cumulant-based information dynamical measure … more
Date: January 28, 2004
Creator: Johnson, Jay R. & Wing, Simon
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Frequency map analysis of nonlinear dynamics in the NLC main damping rings

Description: To avoid radiation damage, the acceptance of linear collider damping rings must be large enough that injection efficiency close to 100 percent can be achieved. Survival plots based on tracking particles in the NLC Main Damping Ring lattice suggest a dynamic aperture with some margin over the specified injected beam size and energy spread. Here, we apply Frequency Map Analysis to give a more detailed picture of the dynamical stability of particle trajectories in the presence of lattice nonlinear… more
Date: October 11, 2004
Creator: Wolski, Andrzej; Venturini, Marco; Wan, Weishi & Marks, Steve
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Nonlinear dynamics of fluid-structure systems. Final technical report for period January 5, 1991 - December 31, 1997

Description: The technical research was directed at problems involving the dynamics of fluid flow and elastic structures. Such problems occur in heat-exchange systems in energy generating plants. Fluid excited vibrations of structures can result in unwanted impact forces which can lead to metal fatigue failures. Mathematical theories based on linear models have been used for several decades. In this research the authors explored the phenomena associated with nonlinear effects using experimental models, math… more
Date: July 20, 1999
Creator: Moon, Francis C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A Study of Nonlinear Dynamics in an Internal Water Wave Field in a Deep Ocean

Description: The Hamiltonian of a stably stratified incompressible fluid in an internal water wave in a deep ocean is constructed. Studying the ocean internal wave field with its full dynamics is formidable (or unsolvable) so we consider a test-wave Hamiltonian to study the dynamical and statistical properties of the internal water wave field in a deep ocean. Chaos is present in the internal test-wave dynamics using actual coupling coefficients. Moreover, there exists a certain separatrix net that fills the… more
Date: December 1996
Creator: Kim, Won-Gyu, 1962-
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Nonlinear Dynamics of Semiconductor Device Circuits and Characterization of Deep Energy Levels in HgCdTe by Using Magneto-Optical Spectroscopy

Description: The nonlinear dynamics of three physical systems has been investigated. Diode resonator systems are experimentally shown to display a period doubling route to chaos, quasiperiodic states, periodic locking states, and Hopf bifurcation to chaos. Particularly, the transition from quasiperiodic states to chaos in line-coupled systems agrees well with the Curry-Yorke model. The SPICE program has been modified to give realistic models for the diode resonator systems.
Date: May 1994
Creator: Yü, Chi
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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