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Frontiers In Antennas Next Generation Design Engineering

Author: Frank Gross
Publisher: McGraw Hill Professional
ISBN: 007163794X
Size: 44.92 MB
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The state of the art in antenna design and engineering Edited by one of the world's foremost authorities on smart antennas and featuring contributions from global experts, Frontiers in Antennas discusses the latest advances in antenna design and engineering. This pioneering guide deals primarily with frontier antenna designs and frontier numerical methods. Many of the concepts presented have emerged within the last few years and are still in a rapid state of development. Each chapter provides in-depth details on a unique and modern antenna technology. Frontiers in Antennas covers: Ultra-wideband antenna arrays using fractal, polyfractal, and aperiodic geometries Smart antennas using evolutionary signal processing methods The latest developments in Vivaldi antenna arrays Effective media models applied to artificial magnetic conductors and high impedance surfaces Novel developments in metamaterial antennas Biological antenna design methods using genetic algorithms Contact and parasitic methods applied to reconfigurable antennas Antennas in medicine: ingestible capsule antennas using conformal meandered methods Leaky-wave antennas Plasma antennas which can electronically appear and disappear Numerical methods in antenna modeling using time, frequency, and conformal domain decomposition methods

Solving Computationally Expensive Engineering Problems

Author: Slawomir Koziel
Publisher: Springer
ISBN: 3319089854
Size: 53.12 MB
Format: PDF
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Computational complexity is a serious bottleneck for the design process in virtually any engineering area. While migration from prototyping and experimental-based design validation to verification using computer simulation models is inevitable and has a number of advantages, high computational costs of accurate, high-fidelity simulations can be a major issue that slows down the development of computer-aided design methodologies, particularly those exploiting automated design improvement procedures, e.g., numerical optimization. The continuous increase of available computational resources does not always translate into shortening of the design cycle because of the growing demand for higher accuracy and necessity to simulate larger and more complex systems. Accurate simulation of a single design of a given system may be as long as several hours, days or even weeks, which often makes design automation using conventional methods impractical or even prohibitive. Additional problems include numerical noise often present in the simulation data, possible presence of multiple locally optimum designs, as well as multiple conflicting objectives. In this edited book, various techniques that can alleviate solving computationally expensive engineering design problems are presented. One of the most promising approaches is the use of fast replacement models, so-called surrogates, that reliably represent the expensive, simulation-based model of the system/device of interest but they are much cheaper and analytically tractable. Here, a group of international experts summarize recent developments in the area and demonstrate applications in various disciplines of engineering and science. The main purpose of the work is to provide the basic concepts and formulations of the surrogate-based modeling and optimization paradigm, as well as discuss relevant modeling techniques, optimization algorithms and design procedures. Therefore, this book should be useful to researchers and engineers from any discipline where computationally heavy simulations are used on daily basis in the design process.

Computational Electromagnetics

Author: Raj Mittra
Publisher: Springer Science & Business Media
ISBN: 1461443822
Size: 65.10 MB
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Emerging Topics in Computational Electromagnetics in Computational Electromagnetics presents advances in Computational Electromagnetics. This book is designed to fill the existing gap in current CEM literature that only cover the conventional numerical techniques for solving traditional EM problems. The book examines new algorithms, and applications of these algorithms for solving problems of current interest that are not readily amenable to efficient treatment by using the existing techniques. The authors discuss solution techniques for problems arising in nanotechnology, bioEM, metamaterials, as well as multiscale problems. They present techniques that utilize recent advances in computer technology, such as parallel architectures, and the increasing need to solve large and complex problems in a time efficient manner by using highly scalable algorithms.

Electromagnetics Of Body Area Networks

Author: Douglas H. Werner
Publisher: John Wiley & Sons
ISBN: 1119083001
Size: 74.65 MB
Format: PDF, ePub
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The book is a comprehensive treatment of the field, covering fundamental theoretical principles and new technological advancements, state-of-the-art device design, and reviewing examples encompassing a wide range of related sub-areas. In particular, the first area focuses on the recent development of novel wearable and implantable antenna concepts and designs including metamaterial-based wearable antennas, microwave circuit integrated wearable filtering antennas, and textile and/or fabric material enabled wearable antennas. The second set of topics covers advanced wireless propagation and the associated statistical models for on-body, in-body, and off-body modes. Other sub-areas such as efficient numerical human body modeling techniques, artificial phantom synthesis and fabrication, as well as low-power RF integrated circuits and related sensor technology are also discussed. These topics have been carefully selected for their transformational impact on the next generation of body-area network systems and beyond.

Artificial Transmission Lines For Rf And Microwave Applications

Author: Ferran Mart?n
Publisher: John Wiley & Sons
ISBN: 1118487605
Size: 44.15 MB
Format: PDF, ePub, Docs
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This book offers a thoroughly up-to-date understanding of artificial transmission lines, from their fundamentals to their main RF and microwave applications. The following topics are presented: fundamentals of transmission lines; artificial transmission lines based on periodic and slow wave structures; artificial lines based on metamaterial concepts; reconfigurable, tunable, and nonlinear transmission lines; magneto- and electro-inductive wave delay lines; common mode suppressed balanced lines; wideband artificial transmission lines; and substrate integrated waveguides.

Foundations And Frontiers In Computer Communication And Electrical Engineering

Author: Aritra Acharyya
Publisher: CRC Press
ISBN: 1315657910
Size: 70.66 MB
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The 3rd International Conference on Foundations and Frontiers in Computer, Communication and Electrical Engineering is a notable event which brings together academia, researchers, engineers and students in the fields of Electronics and Communication, Computer and Electrical Engineering making the conference a perfect platform to share experience, foster collaborations across industry and academia, and evaluate emerging technologies across the globe. The conference is technically co-sponsored by IEEE Kolkata Section along with several IEEE chapters, Kolkata Section such as Electron Devices Society, Power and Energy Society, Dielectrics and Electrical Insulation Society, Computer Society, and in association with CSIR-CEERI, Pilani, Rajasthan. The scope of the conference covers some broad areas of interest (but not limited to) such as Satellite and Mobile Communication Systems, Radar, Antennas, High Power Microwave Systems (HPMS), Electronic Warfare, Information Warfare, UWB systems, Microwave and Optical Communications, Microwave and Millimetre-Wave Tubes, Photonics, Plasma Devices, Missile Tracking and Guided systems, High voltage engineering, Electrical Machines, Power Systems, Control Systems, Non-Conventional Energy, Power Electronics and Drives, Machine Learning and Artificial Intelligence, Networking, Image Processing, Soft Computing, Cloud Computing, Data Mining & Data warehousing, etc.

Energetic Materials

Author: Mark J. Mezger
Publisher: CRC Press
ISBN: 1351681257
Size: 63.83 MB
Format: PDF, Kindle
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This book will take an in-depth look at the technologies, processes, and capabilities to develop and produce "next generation" energetic materials for both commercial and defense applications, including military, mining operations, oil production and well perforation, and construction demolition. It will serve to highlight the critical technologies, latest developments, and the current capability gaps that serve as barriers to military fielding or transition to the commercial marketplace. It will also explain how the processing technologies can be spun out for use in other non-energetics related industries.

Ontology Representation

Author: Rinke Hoekstra
Publisher: IOS Press
ISBN: 1607500132
Size: 55.98 MB
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As the (in)famous definition states: 'An ontology is an explicit specification of a conceptualization'. However, an ontology is also a philosophical theory of existence, a knowledge management resource, a database schema, or a type of knowledge representation artefact on the semantic web. Over the years the term 'ontology' has been used in so many different ways that one can no longer be sure what is meant by it at any given occasion. This book clarifies the role ontologies play in knowledge representation; it discusses the distinctions with their use in philosophy, gives insight in the features, rationale and limitations of the OWL 2 web ontology language, and provides a critical review of methodologies and design principles advocated to improve the quality of ontologies. It covers both theory and practice of knowledge acquisition, representation and ontologies; it emphasises human understanding as knowledge structuring principle, and demonstrates this approach in the development of a core ontology of basic legal concepts (LKIF Core) and in the exploration of expressive ontology design patterns for the representation of social reality, change and causation, actions and transactions. In doing so it contributes to a better understanding of the representation of ontologies, or rather, what it means to do ontology representation.

Frontiers Of Propulsion Science

Author: Marc G. Millis
Publisher: Amer Inst of Aeronautics &
ISBN: 9781563479564
Size: 58.99 MB
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"Frontiers of Propulsion Science" is the first-ever compilation of emerging science relevant to such notions as space drives, warp drives, gravity control, and faster-than-light travelthe kind of breakthroughs that would revolutionize spaceflight and enable human voyages to other star systems. Although these concepts might sound like science fiction, they are appearing in growing numbers in reputable scientific journals.

Frontiers Of Capital

Author: Melissa S. Fisher
Publisher: Duke University Press
ISBN: 0822388235
Size: 49.91 MB
Format: PDF
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With the NASDAQ having lost 70 percent of its value, the giddy, optimistic belief in perpetual growth that accompanied the economic boom of the 1990s had fizzled by 2002. Yet the advances in information and communication technology, management and production techniques, and global integration that spurred the “New Economy” of the 1990s had triggered profound and lasting changes. Frontiers of Capital brings together ethnographies exploring how cultural practices and social relations have been altered by the radical economic and technological innovations of the New Economy. The contributors, most of whom are anthropologists, investigate changes in the practices and interactions of futures traders, Chinese entrepreneurs, residents of French housing projects, women working on Wall Street, cable television programmers, and others. Some contributors highlight how expedited flows of information allow business professionals to develop new knowledge practices. They analyze dynamics ranging from the decision-making processes of the Federal Reserve Board to the legal maneuvering necessary to buttress a nascent Japanese market in over-the-counter derivatives. Others focus on the social consequences of globalization and new modes of communication, evaluating the introduction of new information technologies into African communities and the collaborative practices of open-source computer programmers. Together the essays suggest that social relations, rather than becoming less relevant in the high-tech age, have become more important than ever. This finding dovetails with the thinking of many corporations, which increasingly employ anthropologists to study and explain the “local” cultural practices of their own workers and consumers. Frontiers of Capital signals the wide-ranging role of anthropology in explaining the social and cultural contours of the New Economy. Contributors. Jean Comaroff, John L. Comaroff, Greg Downey, Melissa S. Fisher, Douglas R. Holmes, George E. Marcus, Siobhán O’Mahony, Aihwa Ong, Annelise Riles, Saskia Sassen, Paul A. Silverstein, AbdouMaliq Simone, Neil Smith, Caitlin Zaloom