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Books > Science & Mathematics > Physics > Electricity, magnetism & electromagnetism
The book develops a comprehensive understanding of the surface impedance of the oxide high-temperature superconductors in comparison with the conventional superconductor Nb3Sn. Linear and nonlinear microwave responses are treated separately, both in terms of models, theories or numerical approaches and in terms of experimental results. The theoretical treatment connects fundamental aspects of superconductivity to the specific high-frequency properties. The experimental data review the state of the art, as reported by many international groups. The book describes further the main features of appropriate preparation, handling, mounting, and refrigeration techniques, and finally discusses possible applications in passive and active microwave devices.
In recent years the mathematical modeling of charge transport in semi conductors has become a thriving area in applied mathematics. The drift diffusion equations, which constitute the most popular model for the simula tion of the electrical behavior of semiconductor devices, are by now mathe matically quite well understood. As a consequence numerical methods have been developed, which allow for reasonably efficient computer simulations in many cases of practical relevance. Nowadays, research on the drift diffu sion model is of a highly specialized nature. It concentrates on the explora tion of possibly more efficient discretization methods (e.g. mixed finite elements, streamline diffusion), on the improvement of the performance of nonlinear iteration and linear equation solvers, and on three dimensional applications. The ongoing miniaturization of semiconductor devices has prompted a shift of the focus of the modeling research lately, since the drift diffusion model does not account well for charge transport in ultra integrated devices. Extensions of the drift diffusion model (so called hydrodynamic models) are under investigation for the modeling of hot electron effects in submicron MOS-transistors, and supercomputer technology has made it possible to employ kinetic models (semiclassical Boltzmann-Poisson and Wigner Poisson equations) for the simulation of certain highly integrated devices."
An international team of experts describes the optical and electronic properties of semiconductors and semiconductor nanostructures at picosecond and femtosecond time scales. The contributions cover the latest research on a wide range of topics. In particular they include novel experimental techniques for studying and characterizing nanostructure materials. The contributions are written in a tutorial way so that not only researchers in the field but also researchers and graduate students outside the field can benefit.
The discovery of high temperature superconductivity in 1986 stimulated an enormous research activity around the world in physics, chemistry as well as in materials science. The synthesis, the analysis and the understanding of superconducting Cu-based mixed oxides are difficult scientific challenges. Moreover, the fabrication of superconducting ceramics and of thin films and devices poses new technological problems. Actually, the complexity of these materials is one of the main reasons of their relatively slow appearence on the world market. A successful research in the field of High-Tc supercon ductivity strongly demands a deep cooperation between scientists from various fields. This is exactly why High-Tc superconductivity became a crystallization center or a nucleus for scientific cooperation of researchers from various fields and from different countries. The numerous international conferences on High-Tc materials often unify physicist, chemists and materials scientists, theoreticians as well as experimentalists, aiming to dis cuss and to find the optimum solution for important problems in this field. This idea was the reason why the Department of Inorganic Chemistry of the Moscow State University organized in 1989 the I-st International Workshop "Chemistry and Technology of High Tc materials MSU-HTSC-I." These workshops, organised every other year, allowed to establish and develop scientific cooperation between Western and Russian scientists. In 1998 the 5-th International Workshop on "High Temperature Superconductors and Novel Inorganic Materials Engineering - MSU-HTSC-V" was organized."
Circuits overloaded from electric circuit analysis? Many universities require that students pursuing a degree in electrical or computer engineering take an Electric Circuit Analysis course to determine who will "make the cut" and continue in the degree program. " Circuit Analysis For Dummies" will help these students to better understand electric circuit analysis by presenting the information in an effective and straightforward manner. "Circuit Analysis For Dummies" gives you clear-cut information about the topics covered in an electric circuit analysis courses to help further your understanding of the subject. By covering topics such as resistive circuits, Kirchhoff's laws, equivalent sub-circuits, and energy storage, this book distinguishes itself as the perfect aid for any student taking a circuit analysis course.Tracks to a typical electric circuit analysis courseServes as an excellent supplement to your circuit analysis textHelps you score high on exam day Whether you're pursuing a degree in electrical or computer engineering or are simply interested in circuit analysis, you can enhance you knowledge of the subject with "Circuit Analysis For Dummies. "
During the past century, world-wide energy consumption has risen dramatically, which leads to a quest for new energy sources. Fusion of hydrogen atoms in hot plasmas is an attractive approach to solve the energy problem, with abundant fuel, inherent safety and no long-lived radioactivity. However, one of the limits on plasma performance is due to the various classes of magneto-hydrodynamic instabilities that may occur. The physics and control of these instabilities in modern magnetic confinement fusion devices is the subject of this book. Written by foremost experts, the contributions will provide valuable reference and up-to-date research reviews for "old hands" and newcomers alike.
Englishman OLIVER HEAVISIDE (1850-1925) left school at 16 to teach himself electrical engineering, eventually becoming a renowned mathematician and one of the world's premiere authorities on electromagnetic theory and its applications for communication, including the telegraph and telephone. Here in three volumes are his collected writings on electromagnetic theory-Volume II was first published in 1899. This is a catalog of the bulk of his postulations, theorems, proofs, and common problems (and solutions) in electromagnetism, many of which had been published in article form. Part scientific history-including references to some contemporary criticisms, long since shown to be poorly based, of Heaviside's scholarship-and part guide to understanding a complex applied science, this work shows both the genius and the eccentricity of a man whose work includes precursory theories to Einstein, and revolutionary principles that today are the commonly assumed truths in the field of electrical engineering.
Magnetohydrodynamics (MHD) studies the interaction between the flow of an electrically conducting fluid and magnetic fields. It involves such diverse topics as the evolution and dynamics of astrophysical objects, thermonuclear fusion, metallurgy and semiconductor crystal growth, etc. Although the first ideas in magnetohydrodynamics appeared at the beginning of the last century, the explosion in theoretical and experimental studies occurred in the 1950s-60s. This state-of-the-art book aims at revising the evolution of ideas in various branches of magnetohydrodynamics (astrophysics, earth and solar dynamos, plasmas, MHD turbulence and liquid metals) and reviews current trends and challenges.
This thesis presents a qualitative advance in our understanding of quantum effects in layered magnetic materials. The nearest neighbor Heisenberg ferromagnetic ranks among the oldest and most fundamental models of quantum many body effects. It has long been established that in one dimension quantum fluctuations lead to a quantum disordered ground state with fractional excitations called spinons." In two dimensions, the ground state of the Heisenberg model displays static order and to first approximation the dynamics can be described as semi-classical spin waves. Through theoretical advances the author demonstrates that at high energy around particular points in reciprocal space these semi-classical spin-waves deconfine into fractional excitations akin to the one-dimensional spinons. He thereby provides the first explanation of a long-standing experimental observation. In the second half of his thesis Bastien Dalla Piazza develops a unified description of the magnetic excitation spectra of a range of cuprate parent compounds to the high temperature superconductors.
Electromagnetic Nondestructive Evaluation has grown considerably in recent years largely due to advances in sensor technology, computational modeling and data analysis techniques. This publication discusses developments in numerical simulation of physical phenomena associated with electromagnetic NDE methods, new electromagnetic sensors, signal and image processing techniques and inverse solutions to NDE problems. Electromagnetic Nondestructive Evaluation (IX) emphasizes basic science and early engineering developments in the field, as well as practical application of emerging technologies to problems of direct relevance to industry. The book contains thirty-six technical papers, covering topics on modeling, (forward and inverse problems), new inspection methods, materials characterization, signal processing and applications.
The purpose of the Ultra-Wideband Short-Pulse Electromagnetics
Conference series is to focus on advanced technologies for the
generation, radiation and detection of ultra-wideband short pulse
signals, taking into account their propagation, scattering from and
coupling to targets of interest; to report on developments in
supporting mathematical and numerical methods; and to describe
current and potential future applications of the technology.
Englishman OLIVER HEAVISIDE (1850-1925) left school at 16 to teach himself electrical engineering, eventually becoming a renowned mathematician and one of the world's premiere authorities on electromagnetic theory and its applications for communication, including the telegraph and telephone. Here in three volumes are his collected writings on electromagnetic theory-Volume I was first published in 1893. This is a catalog of the bulk of his postulations, theorems, proofs, and common problems (and solutions) in electromagnetism, many of which had been published in article form. Part scientific history-including references to some contemporary criticisms, long since shown to be poorly based, of Heaviside's scholarship-and part guide to understanding a complex applied science, this work shows both the genius and the eccentricity of a man whose work includes precursory theories to Einstein, and revolutionary principles that today are the commonly assumed truths in the field of electrical engineering.
Provides the state of the art of modelling, simulation and calculation methods for electromagnetic fields and waves and their application.
The IUTAM Symposium on Mechanical and Electromagnetic Waves in Structured Media took place at the University of Sydney from January 18- 22, 1999. It brought together leading researchers from eleven countries for a week-long meeting, with the aim of providing cross-links between the com- nities studying related problems involving elastic and electromagnetic waves in structured materials. After the meeting, participants were invited to submit articles based on their presentations, which were refereed and assembled to constitute these Proceedings. The topics covered here represent areas at the forefront of research intoelastic and electromagnetic waves. They include effect of nonlinearity, diffusion and multiple scattering on waves, as well as asymptotic and numerical techniques. Composite materials are discussed in depth, with example systems ranging fromdusty plasmas to a magneto-elastic microstructured system. Also included are studies of homogenisation, that field which seeks to determine equivalent homogeneous systems which can give equivalent wave properties to structured materials, and inverse problems, in which waves are used as a probe to infer structural details concerning scattering systems. There are also strong groups of papers on the localization of waves by random systems, and photonic and phononic band gap materials. These are being developed by analogue with semiconductors for electrons, and hold out the promise of enabling designers to control the propagation of waves through materials in novel ways. We would like to thank the other members of the Scientific Committee (A.
The Essence of Dielectric Waveguides provides an overview of the fundamental behavior of guided waves, essential to finding and interpreting the results of electromagnetic waveguide problems. Clearly and concisely written as well as brilliantly organized, this volume includes a detailed description of the fundamentals of electromagnetics, as well as a new discussion on boundary conditions and attenuation. It also covers the propagation characteristics of guided waves along classical canonical dielectric structures planar, circular cylindrical, rectangular and elliptical waveguides. What 's more, the authors have included extensive coverage of inhomogeneous structures and approximate methods, as well as several powerful numerical approaches specifically applicable to dielectric waveguides.
This book introduces the basic framework of advanced focal plane technology based on the third-generation infrared focal plane concept. The essential concept, research advances, and future trends in advanced sensor arrays are comprehensively reviewed. Moreover, the book summarizes recent research advances in HgCdTe/AlGaN detectors for the infrared/ultraviolet waveband, with a particular focus on the numerical method of detector design, material epitaxial growth and processing, as well as Complementary Metal-Oxide-Semiconductor Transistor readout circuits. The book offers a unique resource for all graduate students and researchers interested in the technologies of focal plane arrays or electro-optical imaging sensors.
During the past 30 years materials science has developed into a full-fledged field for basic and applied scientific enquiry. Indeed, materials scientists have devoted their efforts to creating new materials with improved electronic, magnetic, thermal, mechanical, and optical properties. Often unnoticed, these new materials are rapidly invading our homes and automobiles, and may be found in our utensils, electronic equipment, textiles, home appliances, and electric motors. Even though they may go unnoticed, these new materials have either improved the efficiency and lifetime of these items or have reduced their weight or cost. In particular, magnetically ordered materials are useful in various applications, such as motors, magnetic imaging, magnetic recording, and magnetic levitation. Hence, much effort has been devoted to the development of better hard magnetic materials, magnetic thin films, and molecular magnets. During the same period of time, Mossbauer-effect spectroscopy has grown from a laboratory curiosity to a mature spectroscopic technique, a technique that probes solid-state materials at specific atomic sites and yields microscopic information on the magnetic and electronic properties of these materials. Iron-57 is the most commonly and easily used Mossbauer-effect isotope and, of course, is particularly relevant for the study of magnetic materials. Various applications of Mossbauer spectroscopy to magnetic materials are discussed in the first six chapters of this volume. Other isotopes such as zinc-67 and gadolinium-ISS have recently been used to study the electronic properties of zinc compounds and the electronic and magnetic properties of rare-earth transition metal compounds.
Impurities, disorder or amorphous systems - ill-condensed matter - are mostly considered inconveniences in the study of materials, which is otherwise heavily based on idealized perfect crystals. The Kondo effect and the scaling theory of localization are among the fundamental and early discoveries which revealed the novelty hidden in impure or disordered systems. Recent advances in condensed matter physics have emphasized the role of topology, spin-orbit coupling, and certain discrete symmetries such as time reversal in many physical phenomena. These have irreversibly transformed the essential ideas and purview of condensed matter physics, both in theoretical and experimental directions. However, many of these recent developments and their implications are limited to, or by, ideas that pertain to clean systems. This thesis deals with various aspects of these new developments, but in the case of unclean systems. The author introduces new ideas such as amorphous topological insulators, fractalized metals and fractionalized spins.
Bonded magnets are the fastest growing sector in the entire market for magnetic materials. Their great advantages lie in the cost effective net-shape manufacturing process allowing the achievement of complex geometries and their isotropic magnetic properties. Energy products have more than quadrupled in recent years, too. The contributors to this volume present the current and future status of bonded magnets, including total world production and distribution, the markets involved, and the status of current and future applications. Current novel processing techniques are described and new developments reported, including powder production techniques, jet casting/melt spinning, atomization and DDDR processes. The different types of bonded magnets reviewed include isotropic and anisotropic neodymium-iron-boron, nanocomposites, Sm-Fe interstitial nitrides, Sm-Co and ferrites.
"Blurb & Contents" "Copies of Onnes's or Meissner's lab notebooks--this is the stuff of science. This book is truly a tour de force. I cannot think of a single person working in the area of superconductivity who would not be totally absorbed by it." Materials & Design The first truly comprehensive history of superconductivity, from the first studies in the late 19th century to the present. It delves deeply into a largely undocumented early history, marked by H. Kamerlingh Onnes's first successes with mercury in 1911 and extending to the onset of World War II. Also encompasses materials development of the fifties, the work that culminated in the BCS theory of the early sixties, and the important recent application of ceramic oxides.
The workshop on "Optical Properties of Low Dimensional Silicon sL Structures" was held in Meylan, France on March, I yd, 1993. The workshop took place inside the facilities of France Telecom- CNET. Around 45 leading scientists working on this rapidly moving field were in attendance. Principal support was provided by the Advanced Research Workshop Program of the North Atlantic Treaty Organisation (NATO). French Delegation a l'Armement and CNET gave also a small financial grant, the organisational part being undertaken by the SEE and CNET. There is currently intense research activity worldwide devoted to the optical properties of low dimensional silicon structures. This follow the recent discovery of efficient visible photoluminescence (PL) from highly porous silicon. This workshop was intended to bring together all the leading European scientists and laboratories in order to reveal the state of the art and to open new research fields on this subject. A large number of invited talks took place (12) together with regular contribution (20). The speakers were asked to leave nearly 1/3 of the time to the discussion with the audience, and that promoted both formal and informal discussions between the participants.
Topological defects are generic in continuous media. In the relativistic quantum vacuum they are known as cosmic strings, in superconductors as quantized flux lines, and in superfluids, low-density atomic Bose-Einstein condensates and neutron stars as quantized vortex lines. This collection of articles by leading scientists presents a modern treatment of the physics of vortex matter, mainly applied to unconventional superconductors and superfluids but with extensions to other areas of physics.
Polarization involves the vectorial nature of light fields. In current applications of optical science, the electromagnetic description of light with its vector features has been shown to be essential: In practice, optical radiation also exhibits randomness and spatial non-uniformity of the polarization state. Moreover, propagation through photonic devices can alter the correlation properties of the light field, resulting in changes in polarization. All these vectorial properties have been gaining importance in recent years, and they are attracting increasing attention in the literature. This is the framework and the scope of the present book, which includes the authors' own contributions to these issues. |
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