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Wide Bandgap Semiconductors for Power Electronics: Materials, Devices, Applications
by Peter WellmannWide Bandgap Semiconductors for Power Electronic A guide to the field of wide bandgap semiconductor technology Wide Bandgap Semiconductors for Power Electronics is a comprehensive and authoritative guide to wide bandgap materials silicon carbide, gallium nitride, diamond and gallium(III) oxide. With contributions from an international panel of experts, the book offers detailed coverage of the growth of these materials, their characterization, and how they are used in a variety of power electronics devices such as transistors and diodes and in the areas of quantum information and hybrid electric vehicles. The book is filled with the most recent developments in the burgeoning field of wide bandgap semiconductor technology and includes information from cutting-edge semiconductor companies as well as material from leading universities and research institutions. By taking both scholarly and industrial perspectives, the book is designed to be a useful resource for scientists, academics, and corporate researchers and developers. This important book: Presents a review of wide bandgap materials and recent developments Links the high potential of wide bandgap semiconductors with the technological implementation capabilities Offers a unique combination of academic and industrial perspectives Meets the demand for a resource that addresses wide bandgap materials in a comprehensive manner Written for materials scientists, semiconductor physicists, electrical engineers, Wide Bandgap Semiconductors for Power Electronics provides a state of the art guide to the technology and application of SiC and related wide bandgap materials.
Wide-Range Antennas
by Boris LevinExpanding the range of antenna frequency is the main objective of this book. Solutions proposed are based on the development of new theoretical methods for analyzing and synthesizing antennas. The book shows that concentrated capacitive loads connected along linear and V-antennas provide a high level of matching with a cable over a wide frequency range and improves directional characteristics of antennas, i.e. increases the communication distance. New theoretical methods are proposed for analysis and synthesis of antennas under consideration: 1) method of calculating directional characteristics of radiators with a given current distribution, and 2) method of electrostatic analogy for calculating mutual and total fields of complex multi-element radiating structures. These methods allow us to obtain optimal directional characteristics for director-type antennas (arrays of Yagi-Uda) and log-periodic antennas with concentrated capacitances and show that use of capacitors makes it possible to extend the frequency range of the director antennas and to decrease dimensions of the log-periodic antennas Multi-element (flat and three-dimensional) self-complementary antennas with different variants of connecting generator poles and cable wires to antenna elements are proposed, which improves the matching with a cable. Characteristics of flat structures are compared with characteristics of volume structures: conical, parabolic, and located on a pyramid edges. The book describes new versions of transparent antennas, antennas for cellular communication, multi-tier and multi-radiator antennas, and much more.
The Wide World of Coding: The People and Careers behind the Programs
by Jennifer Connor-SmithThe best part about coding is that anyone with a computer can learn how to do it. From education to healthcare to entertainment, software touches almost every aspect of twenty-first century life. Take a high-level perspective on the types of people who create that software—including many jobs that do not involve writing code at all. Learn about the software development cycle and the huge variety of skills developers draw on, including psychology, mathematics, and art, to create amazing apps and programs. Explore why diversity is needed to prevent bias in design. Learn about the different coding languages and what they are used for, how developers choose a language, and tools that simplify coding. Jennifer Connor-Smith breaks down stereotypes about coding as a career that is open only to technology-obsessed gamers, revealing ways people use software to improve medical care, nurture dementia patients, promote social justice, and more. Hands-on activities show you how easy it is to learn to think like a coder. The next generation of coders will require diverse teams, creativity, and ethical codes of conduct to create the best and most successful software. Will you be one of them?
Wideband Circuit Design
by Herbert J. CarlinWideband Circuit Design starts at a foundational level and proceeds at a carefully gauged pace to advanced topics, providing a self-sufficient text for specialization in wideband analog circuit design for the fields of telecommunications and related areas. Basic theory and comprehensive circuit analysis methods (oriented for application to general network computer programs) are detailed and then extended to applicational topics such as filters, delay structures, equalizers, matching networks, broadband amplifiers, and microwave components.Novel and simplified approaches to such fundamental topics as linear circuit time domain response, synthesis of cascaded networks, and the construction of Chebychev and elliptic transfer functions are given. For the first time in book form a unified presentation of analytic matching and gain-bandwidth theory, integrated with the numerical Real Frequency design technique (originally published by the authors), is delineated. Wideband Circuit Design presents all the concepts, techniques, and procedures you need to gain the broad understanding necessary for finding creative solutions to wideband circuit design problems.
Wideband CMOS Receivers
by Miguel D. Fernandes Luis B. OliveiraThis book demonstrates how to design a wideband receiver operating in current mode, in which the noise and non-linearity are reduced, implemented in a low cost single chip, using standard CMOS technology. The authors present a solution to remove the transimpedance amplifier (TIA) block and connect directly the mixer's output to a passive second-order continuous-time Σ analog to digital converter (ADC), which operates in current-mode. These techniques enable the reduction of area, power consumption, and cost in modern CMOS receivers.
Wideband Continuous-time ΣΔ ADCs, Automotive Electronics, and Power Management
by Andrea Baschirotto Pieter Harpe Kofi A. A. MakinwaThis book is based on the 18 tutorials presented during the 25th workshop on Advances in Analog Circuit Design. Expert designers present readers with information about a variety of topics at the frontier of analog circuit design, including low-power and energy-efficient analog electronics, with specific contributions focusing on the design of continuous-time sigma-delta modulators, automotive electronics, and power management. This book serves as a valuable reference to the state-of-the-art, for anyone involved in analog circuit research and development.
Wideband FM Techniques for Low-Power Wireless Communications
by John F.M. GerritsUltra Wideband (UWB) communications are poised to enable short-range applications, such as remote health monitoring (e-health) and home or office automation. Sensor networks are also suitable candidates for UWB since the low radiated power of the UWB transmitter enables low DC power consumption, yielding long battery life and the possibility to use energy scavenging. Size and cost constraints require a low-complexity approach that allows multiple users to share the same RF bandwidth, and offers robustness to interference, frequency-selective multipath and antenna mismatch. Wideband FM Techniques for Low-Power Wireless Communications presents research and applications that have taken place in UWB Communications over the past years. This book is being published posthumously in agreement with the authors’ former colleagues from both the Swiss Center for Electronics and Microtechnology (CSEM) and Delft University of Technology in The Netherlands.
Wideband, Multiband, and Smart Antenna Systems (Signals and Communication Technology)
by Mohammad Abdul MatinThis book provides current R&D trends and novel approaches in design and analysis of broadband, multiband, and smart antennas for 5G and B5G mobile and wireless applications, as well as the identification of integration techniques of these antennas in a diverse range of devices. The book presents theoretical and experimental approaches to help the reader in understanding the unique design issues and more advanced research. Moreover, the book includes chapters on the fundamentals of antenna theory. The book is pertinent to professionals and researchers working in the field of antenna engineering; it is written for graduate students, researchers, academics, and industry practitioners who want to improve their understanding in the current research trends in design analysis of broadband, multiband, and smart antennas for wireless applications.
Wideband Radar
by Teng Long Yang Li Weifeng Zhang Quanhua Liu Xinliang Chen Weiming Tian Xiaopeng YangWideband Radar focuses on system theories and signal processing techniques for wideband radar systems. Author Professor Teng Long and his fellows present a comprehensive introduction to the fundamental theory, latest technology developments in signal processing and recent progresses in civil applications of wideband radar. Each chapter begins with an introduction describing what a reader will find in that chapter. The book is addressed to all scientists, whether at universities or in industry, who wish to keep abreast of the important advances in wideband radar. We look forward to further excitement ahead and new developments in wideband radar, and we hope to share them with you, our esteemed readers.
Wideband RF Technologies and Antennas in Microwave Frequencies
by Dr Albert SabbanPresents wideband RF technologies and antennas in the microwave band and millimeter-wave band This book provides an up-to-date introduction to the technologies, design, and test procedures of RF components and systems at microwave frequencies. The book begins with a review of the elementary electromagnetics and antenna topics needed for students and engineers with no basic background in electromagnetic and antenna theory. These introductory chapters will allow readers to study and understand the basic design principles and features of RF and communication systems for communications and medical applications. After this introduction, the author examines MIC, MMIC, MEMS, and LTCC technologies. The text will also present information on meta-materials, design of microwave and mm wave systems, along with a look at microwave and mm wave receivers, transmitters and antennas. Discusses printed antennas for wireless communication systems and wearable antennas for communications and medical applications Presents design considerations with both computed and measured results of RF communication modules and CAD tools Includes end-of-chapter problems and exercises Wideband RF Technologies and Antennas in Microwave Frequencies is designed to help electrical engineers and undergraduate students to understand basic communication and RF systems definition, electromagnetic and antennas theory and fundamentals with minimum integral and differential equations. Albert Sabban, PhD, is a Senior Researcher and Lecturer at Ort Braude College Karmiel Israel. Dr. Sabban was RF and antenna specialist at communication and Biomedical Hi-tech Companies. He designed wearable compact antennas to medical systems. From 1976 to 2007, Dr. Albert Sabban worked as a senior R&D scientist and project leader in RAFAEL.
A Widening Sphere: Evolving Cultures at MIT
by Philip N. AlexanderHow MIT's first nine presidents helped transform the Institute from a small technical school into a major research university.MIT was founded in 1861 as a polytechnic institute in Boston's Back Bay, overshadowed by its neighbor across the Charles River, Harvard University. Harvard offered a classical education to young men of America's ruling class; the early MIT trained men (and a few women) from all parts of society as engineers for the nation's burgeoning industries. Over the years, MIT expanded its mission and ventured into other fields—pure science, social science, the humanities—and established itself in Cambridge as Harvard's enduring rival. In A Widening Sphere, Philip Alexander traces MIT's evolution from polytechnic to major research institution through the lives of its first nine presidents, exploring how the ideas, outlook, approach, and personality of each shaped the school's intellectual and social cultures. Alexander describes, among otherthings, the political skill and entrepreneurial spirit of founder and first president, William Rogers; institutional growing pains under John Runkle; Francis Walker's campaign to broaden the curriculum, especially in the social sciences, and to recruit first-rate faculty; James Crafts, whose heart lay in research, not administration; Henry Pritchett's thwarted effort to merge with Harvard (after which he decamped to the Carnegie Foundation for the Advancement of Teaching); Richard Maclaurin's successful strategy to move the institute to Cambridge, after considering other sites (including a golfclub in Brighton); the brilliant, progressive Ernest Nichols, who succumbed to chronic illness and barely held office; Samuel Stratton's push towards a global perspective; and Karl Compton's vision for a new kind of Institute—a university polarized around science and technology. Through these interlocking yet independent portraits, Alexander reveals the inner workings of a complex and dynamic community of innovators.
Wie ein lebendiges Stadtviertel entsteht: Erkenntnisse aus der Wiener Development-Serie „Wohnen und Arbeiten“
by Manfred WasnerZwölf große Wiener Wohnsiedlungen werden hier vor den Vorhang geholt. Sie repräsentieren das städtebauliche Wiener Pioniermodell „Wohnen und Arbeiten“, dessen zugrundeliegendes Prinzip der Nutzungsmischung im Wien der 80er und 90er Jahre beispielgebend umgesetzt wurde. Es liefert erprobte städtebauliche Vorgangsweisen und politische Strategien für die Umsetzung sozial und wirtschaftlich erfolgreicher Bauprojekte ohne öffentliches Investment. Ziel und Resultat sind Wohnzufriedenheit, Integration, Umwelt- und Klimaschutz in der Großstadt.
Wie funktioniert MRI?: Eine Einführung in Physik und Funktionsweise der Magnetresonanzbildgebung
by Dominik Weishaupt Victor D. Köchli Borut MarincekWie funktioniert MRI? - Genau so!Physik und Funktionsweise der Magnetresonanztomographie sind komplex und für den Nicht-Physiker nur schwierig nachzuvollziehen. Dennoch muss jeder, der diese Technik in der Praxis erfolgreich anwenden möchte, ihre Grundlagen verstehen.In diesem Buch wird das erforderliche physikalische und technische Basiswissen prägnant und bestechend anschaulich erklärt. Dieses Konzept war bereits in 6 Auflagen außerordentlich erfolgreich und wird in der Neuauflage fortgeführt.Sämtliche Kapitel wurden aktualisiert. Dem immer mehr an Bedeutung gewinnenden Thema "Diffusionsbildgebung" wird durch ein neues Kapitel Rechnung getragen. Ein ausführliches Glossar dient dem schnellen Nachschlagen und Lernen von Fachbegriffen.Das Buch ist ein Muss für alle Ärzte, MTRAs und Studenten, die sich mit den Grundlagen der MRT vertraut machen wollen.
Wiederverkaufskultur im Internet
by Siegfried Behrendt Jens Clausen Birgit Blättel-MinkMit Blick auf einen nachhaltigen Konsum eröffnen elektronische Handelsplattformen neue Spielräume. In dem Band werden die Ergebnisse einer empirischen Studie vorgestellt, für die das Kauf- und Verkaufsverhalten, die Motivationen sowie die mit dem Online-Handel verbundenen Umweltauswirkungen erhoben wurden. Am Beispiel von eBay zeigt die Untersuchung erstmals in sehr umfassender Weise das ökologische Potenzial des Online-Handels mit Gebrauchtgütern. Es liegt im Wesentlichen darin, die Lebens- und Nutzungsphase von Produkten zu verlängern.
Wielding the Ax: State Forestry and Social Conflict in Tanzania, 1820-2000 (Ecology and History)
by Thaddeus Sunseri<p>Forests have been at the fault lines of contact between African peasant communities in the Tanzanian coastal hinterland and outsiders for almost two centuries. In recent decades, a global call for biodiversity preservation has been the main challenge to Tanzanians and their forests. <p>Thaddeus Sunseri uses the lens of forest history to explore some of the most profound transformations in Tanzania from the nineteenth century to the present. He explores anticolonial rebellions, the world wars, the depression, the Cold War, oil shocks, and nationalism through their intersections with and impacts on Tanzania’s coastal forests and woodlands. In Wielding the Ax, forest history becomes a microcosm of the origins, nature, and demise of colonial rule in East Africa and of the first fitful decades of independence. <p>Wielding the Ax is a story of changing constellations of power over forests, beginning with African chiefs and forest spirits, both known as “ax–wielders,” and ending with international conservation experts who wield scientific knowledge as a means to controlling forest access. The modern international concern over tropical deforestation cannot be understood without an awareness of the long–term history of these forest struggles.</p>
WiFi, WiMAX and LTE Multi-hop Mesh Networks
by Hung-Yu Wei Sudhir Dixit Jarogniew RykowskiWifi, WiMAX, and Cellular Multihop Networks presents an overview of WiFi-based and WiMAX-based multihop relay networks. As the first text to cover IEEE 802.16j multihop hop relay technology, this revolutionary resource explores the latest advances in multi-hop and ad-hoc networking. Not only does this reference provide the technological aspects, but also the applications for the emerging technology and architectural issues. Ranging from introductory material to advanced topics, this guidebook, plus PowerPoint slides, is essential for engineers, researchers, and students interested in learning more about WiFi and WiMAX multihop relay networks.
WIG Craft and Ekranoplan
by Johnny Doo Alan Bliault Liang YunWIGs (Wing in Ground) are advanced hybrid air cushion crafts and they offer the combination of speed, fuel efficiency, and ride smoothness. WIG rides above the surface like an airplane on a dynamic air cushion that is produced by the vessel's forward motion. The adoption of WIG has been slow due to the complicated technology issues surrounding the vessel; it is a hybrid vehicle that combines marine and aviation theory, wing theory and air cushion theory, aerodynamic and hydrodynamic theory. "WIG Craft and Ekranoplan: Ground Effect Craft Technology" provides comprehensive overview of the design, development and building of WIG vessels."
The Wigner Monte Carlo Method for Nanoelectronic Devices: A Particle Description of Quantum Transport and Decoherence (Wiley-iste Ser.)
by Damien Querlioz Philippe DollfusThis book gives an overview of the quantum transport approaches for nanodevices and focuses on the Wigner formalism. It details the implementation of a particle-based Monte Carlo solution of the Wigner transport equation and how the technique is applied to typical devices exhibiting quantum phenomena, such as the resonant tunnelling diode, the ultra-short silicon MOSFET and the carbon nanotube transistor. In the final part, decoherence theory is used to explain the emergence of the semi-classical transport in nanodevices.
Wigner-Verteilung trifft Lichtquantenleiter (essentials)
by Reiner ThieleReiner Thiele löst die Leitungsgleichungen des Lichtquantenleiters. Er erhält aus diesen Ergebnissen eine einheitliche Impulsantwort, unabhängig von der Ansteuerart dieses Übertragungskanals. Weiterhin berechnet der Autor die Wigner-Spannungsverteilung und -Stromverteilung des Eingangs- und Ausgangssignals sowie die Wigner-Verteilung der Impulsantwort des linearen zeitinvarianten Lichtquantenleiters. Daraus ergibt sich ein neues Übertragungsverfahren auf der Grundlage der Wigner-Übertragungsgleichung als spezielles Faltungsintegral. Abschließend sind Methoden der Signal-Rekonstruktion dargestellt.
Wiki Media Leaks: La relación entre medios y gobiernos de América Latina bajo el prisma de los cables de WikiLeaks
by Martín Becerra Sebastián Lacunza<P>El explosivo archivo ofrecido por Julian Assange y su organización WikiLeaks ha sido leído y reinterpretado desde diferentes ángulos, y desde cualquiera de ellos sigue revelando una trama compleja y a menudo ocultada de las relaciones internacionales. <P>Este libro aborda en exclusividad el material inédito sobre las tensas relaciones (o acuerdos de convivencia, en algunos casos) entre dueños de medios, periodistas y editores influyentes con los gobiernos latinoamericanos y la Casa Blanca. Se lee también como un gran mapa para saber quién es quién en la red informativa de la región y cómo el periodismo, desde siempre, ha sido un agente más en la construcción del poder político. Los autores, Martín Becerra y Sebastián Lacunza, así lo explican: #Los roles se alternan y se confunden: los medios de comunicación y los políticos o diplomáticos pueden ser fuentes y recolectores de información indistintamente, retroalimentando las versiones que se originan en esos círculos herméticos. En términos de eficacia sistémica, el margen de error en la validez de la información que circula es muy alto, por la endogamia que practican los agentes protagonistas#. <P>En la América Latina del siglo XXI, con nuevas leyes de medios y redefinición del vínculo de los gobiernos con gigantes de las telecomunicaciones y emergentes en el campo periodístico, el material diplomático de las embajadas estadounidenses resulta una crónica documental esencial de las relaciones de fuerza de este tiempo singular. Su propio contenido explica los silencios que se han registrado a la hora de difundir los cables de WikiLeaks, que este trabajo aspira a iluminar.
Wikinomics
by Anthony D. Williams Don TapscottThe acclaimed bestseller that's teaching the world about the power of mass collaboration. Translated into more than twenty languages and named one of the best business books of the year by reviewers around the world, Wikinomics has become essential reading for business people everywhere. It explains how mass collaboration is happening not just at Web sites like Wikipedia and YouTube, but at traditional companies that have embraced technology to breathe new life into their enterprises. This national bestseller reveals the nuances that drive wikinomics, and share fascinating stories of how masses of people (both paid and volunteer) are now creating TV news stories, sequencing the human gnome, remixing their favorite music, designing software, finding cures for diseases, editing school texts, inventing new cosmetics, and even building motorcycles.
Wikipedia U: Knowledge, Authority, and Liberal Education in the Digital Age (Tech.edu: A Hopkins Series on Education and Technology)
by Thomas LeitchExplores the battle between the top-down authority traditionally ascribed to experts and scholars and the bottom-up authority exemplified by Wikipedia.Since its launch in 2001, Wikipedia has been a lightning rod for debates about knowledge and traditional authority. It has come under particular scrutiny from publishers of print encyclopedias and college professors, who are skeptical about whether a crowd-sourced encyclopedia—in which most entries are subject to potentially endless reviewing and editing by anonymous collaborators whose credentials cannot be established—can ever truly be accurate or authoritative. In Wikipedia U, Thomas Leitch argues that the assumptions these critics make about accuracy and authority are themselves open to debate. After all, academics are expected both to consult the latest research and to return to the earliest sources in their field, each of which has its own authority. And when teachers encourage students to master information so that they can question it independently, their ultimate goal is to create a new generation of thinkers and makers whose authority will ultimately supplant their own.Wikipedia U offers vital new lessons about the nature of authority and the opportunities and challenges of Web 2.0. Leitch regards Wikipedia as an ideal instrument for probing the central assumptions behind liberal education, making it more than merely, as one of its severest critics has charged, "the encyclopedia game, played online."
Wilbur and Orville: A Biography of the Wright Brothers (Dover Transportation)
by Fred HowardDefinitive, highly regarded study tells the full story of the brothers' lives and work -- before, during and after the historic flight at Kitty Hawk: early experiments and glider flights on Indiana sand dunes, exhilarating days on North Carolina's Outer Banks, the bitter patent fight that followed, Wilbur's untimely death, and more.
Wilbur and Orville Wright: The Flight to Adventure
by Louis SabinFocuses on the childhood of the Wright brothers and the inventiveness they displayed from their earliest days.
