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Excitons in Low-Dimensional Semiconductors: Theory Numerical Methods Applications

Posted By: AvaxGenius
Excitons in Low-Dimensional Semiconductors: Theory Numerical Methods Applications

Excitons in Low-Dimensional Semiconductors: Theory Numerical Methods Applications by Stephan Glutsch
English | PDF | 2004 | 302 Pages | ISBN : 3540202404 | 24.8 MB

Low-dimensional semiconductors have become a vital part of today's semiconductor physics, and excitons in these systems are ideal objects that bring textbook quantum mechanics to life. Furthermore, their theoretical understanding is important for experiments and optoelectronic devices. The author develops the effective-mass theory of excitons in low-dimensional semiconductors and describes numerical methods for calculating the optical absorption including Coulomb interaction, geometry, and external fields. The theory is applied to Fano resonances in low-dimensional semiconductors and the Zener breakdown in superlattices. Comparing theoretical results with experiments, the book is essentially self-contained; it is a hands-on approach with detailed derivations, worked examples, illustrative figures, and computer programs. The book is clearly structured and will be valuable as an advanced-level self-study or course book for graduate students, lecturers, and researchers.

Mathematical Modeling and Simulation in Mechanics and Dynamic Systems, 2nd Edition

Posted By: AvaxGenius
Mathematical Modeling and Simulation in Mechanics and Dynamic Systems, 2nd Edition

Mathematical Modeling and Simulation in Mechanics and Dynamic Systems, 2nd Edition by Maria Luminit , a Scutaru, Catalin I. Pruncu
English | PDF | 2024 | 226 Pages | ISBN : N/A | 20.6 MB

Although it has been considered difficult to make further contributions in the field of mechanics, the spectacular evolution of technology and numerical calculation techniques has made these opinions shift, and increasingly sophisticated models have been developed, which should predict, as accurately as possible, the phenomena that take place in dynamic systems. Therefore, researchers have come to study mechanical systems with complicated behavior using experiments and computer models [ 1 – 3 ]. The key requirement is that the system is nonlinear in its form. The impetus in mechanics and dynamical systems has come from many sources: computer simulation, experimental science, mathematics, and modeling [ 4 – 7 ]. There is a wide range of influences. Computer experiments change the way in which we analyze these systems. Topics of interest include, but are not limited to, modeling mechanical systems, new methods in dynamic systems, the behavior simulation of a mechanical system, nonlinear systems, multibody systems with elastic elements, multi- degrees of freedom, mechanical systems, experimental modal analysis, and mechanics of materials.

Sustained Simulation Performance 2022

Posted By: hill0
Sustained Simulation Performance 2022

Sustained Simulation Performance 2022
English | 2024 | ISBN: 3031410726 | 88 Pages | PDF EPUB (True) | 14 MB

Space Plasma Simulation

Posted By: AvaxGenius
Space Plasma Simulation

Space Plasma Simulation by Jörg Büchner, Manfred Scholer, Christian T. Dum
English | PDF | 2003 | 363 Pages | ISBN : 3540006982 | 8.7 MB

The aim of this book is twofold: to provide an introduction for newcomers to state of the art computer simulation techniques in space plasma physics and an overview of current developments. Computer simulation has reached a stage where it can be a highly useful tool for guiding theory and for making predictions of space plasma phenomena, ranging from microscopic to global scales. The various articles are arranged, as much as possible, according to the - derlying simulation technique, starting with the technique that makes the least number of assumptions: a fully kinetic approach which solves the coupled set of Maxwell’s equations for the electromagnetic ?eld and the equations of motion for a very large number of charged particles (electrons and ions) in this ?eld. Clearly, this is also the computationally most demanding model. Therefore, even with present day high performance computers, it is the most restrictive in terms of the space and time domain and the range of particle parameters that can be covered by the simulation experiments. It still makes sense, therefore, to also use models, which due to their simp- fying assumptions, seem less realistic, although the e?ect of these assumptions on the outcome of the simulation experiments needs to be carefully assessed.

Magnetohydrodynamic Equilibrium and Stability of Stellarators

Posted By: AvaxGenius
Magnetohydrodynamic Equilibrium and Stability of Stellarators

Magnetohydrodynamic Equilibrium and Stability of Stellarators by Frances Bauer , Octavio Betancourt , Paul Garabedian
English | PDF | 1984 | 203 Pages | ISBN : 1461297532 | 12.2 MB

In this book, we describe in detail a numerical method to study the equilibrium and stability of a plasma confined by a strong magnetic field in toroidal geometry without two-dimensional symmetry. The principal appli­ cation is to stellarators, which are currently of interest in thermonuclear fusion research. Our mathematical model is based on the partial differential equations of ideal magnetohydrodynamics. The main contribution is a computer code named BETA that is listed in the final chapter. This work is the natural continuation of an investigation that was presented in an early volume of the Springer Series in Computational Physics (cf. [3]). It has been supported over a period of years by the U.S. Department of Energy under Contract DE-AC02-76ER03077 with New York University. We would like to express our gratitude to Dr. Franz Herrnegger for the assistance he has given us with the preparation of the manuscript.

The Hybrid Multiscale Simulation Technology

Posted By: AvaxGenius
The Hybrid Multiscale Simulation Technology

The Hybrid Multiscale Simulation Technology: An Introduction with Application to Astrophysical and Laboratory Plasmas by Alexander S. Lipatov
English | PDF | 2002 | 411 Pages | ISBN : 3540417346 | 54.8 MB

This book addresses hybrid simulation of plasmas; it is aimed at developing insight into the essence of plasma behavior. Major current applications are to astrophysical and space plasmas. Some applications are connected with active experiments in space. However, hybrid simulations are also being used to gain an understanding of basic plasma phenomena such as particle acceleration by shocks, magnetic field reconnect ion in neutral current sheets, generation of waves by beams, mass loading of the supersonic flow by heavy pickup ions and the dynamics of tangential discontinuities. Such simulations may be very important not only for the study of the astrophysical plasmas, but also for the study of the magnetically and inertially contained fusion plasmas, and other laboratory plasma devices. Plasma is the fourth state of matter, consisting of electrons, ions and 4 neutral atoms, usually at temperatures above 10 K. The stars and sun are plasmas; the local interstellar medium, the solar wind, magnetospheres and ionospheres of planets and comets, Van-Allen belts, etc., are all plasmas. Indeed, much of the known matter in the universe is plasma.

Analytical Techniques of Celestial Mechanics

Posted By: AvaxGenius
Analytical Techniques of Celestial Mechanics

Analytical Techniques of Celestial Mechanics by Victor A. Brumberg
English | PDF | 1995 | 243 Pages | ISBN : 3642794564 | 17.5 MB

The aim of this book is to describe contemporary analytical and semi­ analytical techniques for solving typical celestial-mechanics problems. The word "techniques" is used here as a term intermediate between "methods" and "recipes". One often conceives some method of solution of a problem as a general mathematical tool, while not taking much care with its computa­ tional realization. On the other hand, the word "recipes" may nowadays be understood in the sense of the well-known book Numerical Recipes (Press et al. , 1992), where it means both algorithms and their specific program realiza­ tion in Fortran, C or Pascal. Analytical recipes imply the use of some general or specialized computer algebra system (CAS). The number of different CAS currently employed in celestial mechanics is too large to specify just a few of the most preferable systems. Besides, it seems reasonable not to mix the essence of any algorithm with its particular program implementation. For these reasons, the analytical techniques of this book are to be regarded as algorithms to be implemented in different ways depending on the hardware and software available. The book was preceded by Analytical Algorithms of Celestial Mechanics by the same author, published in Russian in 1980. In spite of there being much common between these books, the present one is in fact a new mono­ graph.

Particle-Laden Flow: From Geophysical to Kolmogorov Scales

Posted By: AvaxGenius
Particle-Laden Flow: From Geophysical to Kolmogorov Scales

Particle-Laden Flow: From Geophysical to Kolmogorov Scales by Bernard J. Geurts, Herman Clercx, Wim Uijttewaal
English | PDF | 2007 | 408 Pages | ISBN : 1402062176 | 8.7 MB

This book contains a selection of the papers that were presented at the EUROMECH colloquium on particle-laden flow held at the University of Twente in 2006. The multiscale nature of this challenging field motivated the calling of the colloquium and reflects the central importance that the dispersion of particles in a flow has in various geophysical and environmental problems. The spreading of aerosols and soot in the air, the growth and dispersion of plankton blooms in seas and oceans, or the transport of sediment in rivers, estuaries and coastal regions are striking examples.

Continuous System Simulation

Posted By: AvaxGenius
Continuous System Simulation

Continuous System Simulation by François E. Cellier , Ernesto Kofman
English | PDF | 2006 | 659 Pages | ISBN : 0387261028 | 4.8 MB

Continuous System Simulation describes systematically and methodically how mathematical models of dynamic systems, usually described by sets of either ordinary or partial differential equations possibly coupled with algebraic equations, can be simulated on a digital computer.

Function and Regulation of Cellular Systems

Posted By: AvaxGenius
Function and Regulation of Cellular Systems

Function and Regulation of Cellular Systems by Andreas Deutsch, Jonathon Howard, Martin Falcke, Walter Zimmermann
English | PDF | 2004 | 448 Pages | ISBN : 3764369256 | 43.2 MB

Current biological research demands the extensive use of sophisticated mathematical methods and computer-aided analysis of experiments and data. This highly interdisciplinary volume focuses on structural, dynamical and functional aspects of cellular systems and presents corresponding experiments and mathematical models. The book may serve as an introduction for biologists, mathematicians and physicists to key questions in cellular systems which can be studied with mathematical models. Recent model approaches are presented with applications in cellular metabolism, intra- and intercellular signaling, cellular mechanics, network dynamics and pattern formation. In addition, applied issues such as tumor cell growth, dynamics of the immune system and biotechnology are included.

Computational Intelligence in Time Series Forecasting: Theory and Engineering Applications (Repost)

Posted By: AvaxGenius
Computational Intelligence in Time Series Forecasting: Theory and Engineering Applications (Repost)

Computational Intelligence in Time Series Forecasting: Theory and Engineering Applications by Ajoy K. Palit , Dobrivoje Popovic
English | PDF | 2005 | 382 Pages | ISBN : 1852339489 | 3.2 MB

Foresight in an engineering enterprise can make the difference between success and failure, and can be vital to the effective control of industrial systems. Applying time series analysis in the on-line milieu of most industrial plants has been problematic owing to the time and computational effort required. The advent of soft computing tools offers a solution.

Modelling in Natural Sciences: Design, Validation and Case Studies

Posted By: AvaxGenius
Modelling in Natural Sciences: Design, Validation and Case Studies

Modelling in Natural Sciences: Design, Validation and Case Studies by Tibor Müller , Harmund Müller
English | PDF | 2003 | 469 Pages | ISBN : 3540001530 | 43.5 MB

This book defines the wide application of the art of modelling. The main emphasis is on the imaging of dynamic processes which are analysed and subdivided into their atomic constituents by means of systems analysis. The cyclic structure and the stages of models set-up are explained. The evaluation of a models quality is regarded as a stochastic process. The aspects of grade used in different fields of sciences are brought into perspective. Thus, a quantitative concept of validity on the basis of conditional degrees of rational belief can be developed.

Computational Modeling and Problem Solving in the Networked World (Repost)

Posted By: AvaxGenius
Computational Modeling and Problem Solving in the Networked World (Repost)

Computational Modeling and Problem Solving in the Networked World: Interfaces in Computer Science and Operations Research by Hemant K. Bhargava, Nong Ye
English | PDF | 2003 | 322 Pages | ISBN : 1402072953 | 28.6 MB

This book is a compilation of a selected subset of research articles presented at the Eighth INFORMS Computing Society Conference, held in Chandler, Arizona, from January 8 to 10, 2003. The articles in this book represent the diversity and depth of the interface between ORiMS (operations research and the management sciences) and CS/AI (computer science and artificial intelligence ). This volume starts with two papers that represent the reflective and integrative thinking that is critical to any scientific discipline.

Computational Models for Neuroscience: Human Cortical Information Processing

Posted By: AvaxGenius
Computational Models for Neuroscience: Human Cortical Information Processing

Computational Models for Neuroscience: Human Cortical Information Processing by Robert Hecht-Nielsen, Thomas McKenna
English | PDF | 2003 | 311 Pages | ISBN : 1852335939 | 31.9 MB

Formal study of neuroscience (broadly defined) has been underway for millennia. For example, writing 2,350 years ago, Aristotle! asserted that association - of which he defined three specific varieties - lies at the center of human cognition. Over the past two centuries, the simultaneous rapid advancements of technology and (conse­ quently) per capita economic output have fueled an exponentially increasing effort in neuroscience research.

Damage Mechanics with Finite Elements: Practical Applications with Computer Tools

Posted By: AvaxGenius
Damage Mechanics with Finite Elements: Practical Applications with Computer Tools

Damage Mechanics w by ith Finite Elements: Practical Applications with Computer Tools by P. I. Kattan , G. Z. Voyiadjis
English | PDF | 2002 | 116 Pages | ISBN : 354042279X | 6.9 MB

The major goal of this book is to present the implementation of some damage models with finite elements. The damage models are based on the principles of continuum damage mechanics and the effective stress concept. Several books have appeared recently on damage mechanics but are mostly theoretical in nature. Alternatively, this book provides a complete finite element program that includes the effects of damage. The book consists of two parts. Part I includes two chapters mainly review­ ing topics from finite element analysis and continuum damage mechanics.