Nonlinear Spatio-Temporal Dynamics and Chaos in Semiconductors

Nonlinear Spatio-Temporal Dynamics and Chaos in Semiconductors PDF Author: Eckehard Schöll
Publisher: Cambridge University Press
ISBN: 0521451868
Category : Mathematics
Languages : en
Pages : 422

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Book Description
This book brings together concepts from semiconductor physics, nonlinear-dynamics and chaos to examine semiconductor transport phenomena.

Nonlinear Spatio-Temporal Dynamics and Chaos in Semiconductors

Nonlinear Spatio-Temporal Dynamics and Chaos in Semiconductors PDF Author: Eckehard Schöll
Publisher: Cambridge University Press
ISBN: 0521451868
Category : Mathematics
Languages : en
Pages : 422

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Book Description
This book brings together concepts from semiconductor physics, nonlinear-dynamics and chaos to examine semiconductor transport phenomena.

High Performance Computing in Science and Engineering ’02

High Performance Computing in Science and Engineering ’02 PDF Author: Egon Krause
Publisher: Springer Science & Business Media
ISBN: 3642593542
Category : Mathematics
Languages : en
Pages : 517

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Book Description
This book presents the state-of-the-art in modeling and simulation on supercomputers. Leading German research groups present their results achieved on high-end systems of the High Performance Computing Center Stuttgart (HLRS) for the year 2002. Reports cover all fields of supercomputing simulation ranging from computational fluid dynamics to computer science. Special emphasis is given to industrially relevant applications. Moreover, by presenting results for both vector sytems and micro-processor based systems the book allows to compare performance levels and usability of a variety of supercomputer architectures. It therefore becomes an indispensable guidebook to assess the impact of the Japanese Earth Simulator project on supercomputing in the years to come.

Intense Terahertz Excitation of Semiconductors

Intense Terahertz Excitation of Semiconductors PDF Author: Sergey Ganichev
Publisher: Oxford University Press, USA
ISBN: 0198528302
Category : Language Arts & Disciplines
Languages : en
Pages : 431

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Book Description
This work presents the first comprehensive treatment of high-power terahertz applications to semiconductors and low-dimensional semiconductor structures. Terahertz properties of semiconductors are in the centre of scientific activities because of the need of high-speed electronics.

Delay Controlled Partial Synchronization in Complex Networks

Delay Controlled Partial Synchronization in Complex Networks PDF Author: Jakub Sawicki
Publisher: Springer Nature
ISBN: 3030340767
Category : Science
Languages : en
Pages : 175

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Book Description
The focus of this thesis are synchronization phenomena in networks and their intrinsic control through time delay, which is ubiquitous in real-world systems ranging from physics and acoustics to neuroscience and engineering. We encounter synchronization everywhere and it can be either a helpful or a detrimental mechanism. In the first part, after a survey of complex nonlinear systems and networks, we show that a seemingly simple system of two organ pipes gives birth to complex bifurcation and synchronization scenarios. Going from a 2-oscillator system to a ring of oscillators, we encounter the intriguing phenomenon of chimera states which are partial synchrony patterns with coexisting domains of synchronized and desynchronized dynamics. For more than a decade scientist have tried to solve the puzzle of this spontaneous symmetry-breaking emerging in networks of identical elements. We provide an analysis of initial conditions and extend our model by the addition of time delay and fractal connectivities. In the second part, we investigate partial synchronization patterns in a neuronal network and explain dynamical asymmetry arising from the hemispheric structure of the human brain. A particular focus is on the novel scenario of partial relay synchronization in multiplex networks. Such networks allow for synchronization of the coherent domains of chimera states via a remote layer, whereas the incoherent domains remain desynchronized. The theoretical framework is demonstrated with different generic models.

Räumliche Aspekte intrazellulärer Signalübertragung und Musterbildung in der Glykolyse

Räumliche Aspekte intrazellulärer Signalübertragung und Musterbildung in der Glykolyse PDF Author: Ronny Straube
Publisher: Logos Verlag Berlin GmbH
ISBN: 3832528946
Category : Mathematics
Languages : en
Pages : 197

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Book Description
Die vorliegende Arbeit behandelt verschiedene Aspekte der raum-zeitlichen Musterbildung in biologischen oder biologisch motivierten Reaktions-Diffusions-Systemen. Die hierbei auftretenden Muster werden entweder durch die, dem System auferlegten, Randbedingungen oder durch diffusive Kopplung nichtlinearer biochemischer Reaktionen hervorgerufen. Im ersten Teil der Arbeit werden Systeme in singular gestorten zwei- oder drei-dimensionalen Gebieten untersucht. Das sind Gebiete mit kleinen Lochern im Innern oder auf dem Rand des Definitionsgebietes. Mit Hilfe asymptotischer Methoden wird gezeigt, dass sich die Locher wie Punktsingularitaten verhalten, die durch entsprechende Greensche oder Neumann Funktionen beschrieben werden konnen. Es werden asymptotische Losungen fur durch Signalmolekule hervorgerufene intrazellulare Konzentrationsgradienten sowie fur die mittlere Verweilzeit diffundierender Molekule in der Gegenwart mehrerer, kleiner absorbierender Kompartimente (Locher) fur verschiedene Gebiete konstruiert. Im zweiten Teil der Arbeit wird am Beispiel der Entstehung einwarts rotierender Spiralwellen (Antispiralen) in der Glykolyse untersucht, wie sich bestimmte molekulare Reaktionsmechanismen auf die im System entstehenden raum-zeitlichen Muster auswirken. Zu diesem Zweck werden die Parameter einer zugeordneten komplexen Ginzburg-Landau Gleichung fur verschiedene Mechanismen der Produktaktivierung der Phosphofruktokinase (PFK) explizit berechnet und die entsprechenden Phasendiagramme miteinander verglichen. Die Analyse zeigt, dass das Auftreten von Antispiralen sowohl vom PFK-Aktivierungsmechanismus als auch von der Anzahl der PFK-Untereinheiten abhangt.

Patterns of Synchrony in Complex Networks of Adaptively Coupled Oscillators

Patterns of Synchrony in Complex Networks of Adaptively Coupled Oscillators PDF Author: Rico Berner
Publisher: Springer Nature
ISBN: 303074938X
Category : Science
Languages : en
Pages : 210

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Book Description
The focus of this thesis is the interplay of synchrony and adaptivity in complex networks. Synchronization is a ubiquitous phenomenon observed in different contexts in physics, chemistry, biology, neuroscience, medicine, socioeconomic systems, and engineering. Most prominently, synchronization takes place in the brain, where it is associated with cognitive capacities like learning and memory, but is also a characteristic of neurological diseases like Parkinson and epilepsy. Adaptivity is common in many networks in nature and technology, where the connectivity changes in time, i.e., the strength of the coupling is continuously adjusted depending upon the dynamic state of the system, for instance synaptic neuronal plasticity in the brain. This research contributes to a fundamental understanding of various synchronization patterns, including hierarchical multifrequency clusters, chimeras and other partial synchronization states. After a concise survey of the fundamentals of adaptive and complex dynamical networks and synaptic plasticity, in the first part of the thesis the existence and stability of cluster synchronization in globally coupled adaptive networks is discussed for simple paradigmatic phase oscillators as well as for a more realistic neuronal oscillator model with spike-timing dependent plasticity. In the second part of the thesis the interplay of adaptivity and connectivity is investigated for more complex network structures like nonlocally coupled rings, random networks, and multilayer systems. Besides presenting a plethora of novel, sometimes intriguing patterns of synchrony, the thesis makes a number of pioneering methodological advances, where rigorous mathematical proofs are given in the Appendices. These results are of interest not only from a fundamental point of view, but also with respect to challenging applications in neuroscience and technological systems.

Semiconductor Devices

Semiconductor Devices PDF Author: Amal Banerjee
Publisher: Springer Nature
ISBN: 3031457501
Category : Technology & Engineering
Languages : en
Pages : 305

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Book Description
This book examines in detail how a semiconductor device is designed and fabricated to satisfy best the requirements of the target application. The author presents and explains both basic and state-of-art semiconductor industry standards used in large/small signal equivalent circuit models for semiconductor devices that electronics engineers routinely use in their design calculations. The presentation includes detailed, step-by-step information on how a semiconductor device is fabricated, and the very sophisticated supporting technologies used in the process flow. The author also explains how standard laboratory equipment can be used to extract useful performance metrics of a semiconductor device.

Computational Science and Its Applications - ICCSA 2004

Computational Science and Its Applications - ICCSA 2004 PDF Author: Antonio Laganà
Publisher: Springer
ISBN: 354024767X
Category : Computers
Languages : en
Pages : 1081

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Book Description
The natural mission of Computational Science is to tackle all sorts of human problems and to work out intelligent automata aimed at alleviating the b- den of working out suitable tools for solving complex problems. For this reason ComputationalScience,thoughoriginatingfromtheneedtosolvethemostch- lenging problems in science and engineering (computational science is the key player in the ?ght to gain fundamental advances in astronomy, biology, che- stry, environmental science, physics and several other scienti?c and engineering disciplines) is increasingly turning its attention to all ?elds of human activity. In all activities, in fact, intensive computation, information handling, kn- ledge synthesis, the use of ad-hoc devices, etc. increasingly need to be exploited and coordinated regardless of the location of both the users and the (various and heterogeneous) computing platforms. As a result the key to understanding the explosive growth of this discipline lies in two adjectives that more and more appropriately refer to Computational Science and its applications: interoperable and ubiquitous. Numerous examples of ubiquitous and interoperable tools and applicationsaregiveninthepresentfourLNCSvolumescontainingthecontri- tions delivered at the 2004 International Conference on Computational Science and its Applications (ICCSA 2004) held in Assisi, Italy, May 14–17, 2004.

An Exploration of Dynamical Systems and Chaos

An Exploration of Dynamical Systems and Chaos PDF Author: John H. Argyris
Publisher: Springer
ISBN: 3662460424
Category : Technology & Engineering
Languages : en
Pages : 884

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Book Description
This book is conceived as a comprehensive and detailed text-book on non-linear dynamical systems with particular emphasis on the exploration of chaotic phenomena. The self-contained introductory presentation is addressed both to those who wish to study the physics of chaotic systems and non-linear dynamics intensively as well as those who are curious to learn more about the fascinating world of chaotic phenomena. Basic concepts like Poincaré section, iterated mappings, Hamiltonian chaos and KAM theory, strange attractors, fractal dimensions, Lyapunov exponents, bifurcation theory, self-similarity and renormalisation and transitions to chaos are thoroughly explained. To facilitate comprehension, mathematical concepts and tools are introduced in short sub-sections. The text is supported by numerous computer experiments and a multitude of graphical illustrations and colour plates emphasising the geometrical and topological characteristics of the underlying dynamics. This volume is a completely revised and enlarged second edition which comprises recently obtained research results of topical interest, and has been extended to include a new section on the basic concepts of probability theory. A completely new chapter on fully developed turbulence presents the successes of chaos theory, its limitations as well as future trends in the development of complex spatio-temporal structures. "This book will be of valuable help for my lectures" Hermann Haken, Stuttgart "This text-book should not be missing in any introductory lecture on non-linear systems and deterministic chaos" Wolfgang Kinzel, Würzburg “This well written book represents a comprehensive treatise on dynamical systems. It may serve as reference book for the whole field of nonlinear and chaotic systems and reports in a unique way on scientific developments of recent decades as well as important applications.” Joachim Peinke, Institute of Physics, Carl-von-Ossietzky University Oldenburg, Germany

Synergetics

Synergetics PDF Author: Hermann Haken
Publisher: Springer Science & Business Media
ISBN: 366210184X
Category : Mathematics
Languages : en
Pages : 761

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Book Description
This book is an often-requested reprint of two classic texts by H. Haken: "Synergetics. An Introduction" and "Advanced Synergetics". Synergetics, an interdisciplinary research program initiated by H. Haken in 1969, deals with the systematic and methodological approach to the rapidly growing field of complexity. Going well beyond qualitative analogies between complex systems in fields as diverse as physics, chemistry, biology, sociology and economics, Synergetics uses tools from theoretical physics and mathematics to construct an unifying framework within which quantitative descriptions of complex, self-organizing systems can be made. This may well explain the timelessness of H. Haken's original texts on this topic, which are now recognized as landmarks in the field of complex systems. They provide both the beginning graduate student and the seasoned researcher with solid knowledge of the basic concepts and mathematical tools. Moreover, they admirably convey the spirit of the pioneering work by the founder of Synergetics through the essential applications contained herein that have lost nothing of their paradigmatic character since they were conceived.