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Conception De Convertisseurs Dc Dc A Base De Mems
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Book Synopsis Conception de convertisseurs DC/DC à base de MEMS by : Sahar Ghandour
Download or read book Conception de convertisseurs DC/DC à base de MEMS written by Sahar Ghandour and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: La tendance actuelle vers la miniaturisation des circuits électroniques a poussé vers ledéveloppement des systèmes sur puce (SoC : System on Chip) contenant plusieurs composants. Cescomposants réalisant des fonctions variées, ont besoin de différentes tensions d'alimentation fourniesà l'aide de plusieurs convertisseurs DC/DC connectés à l'alimentation du SoC. Actuellement, laplupart des circuits électroniques dans les applications portables contiennent des convertisseursDC/DC conventionnels utilisant une inductance pour stocker transitoirement l'énergie électrique.L'inductance étant un composant passif difficilement intégrable, ces convertisseurs sontconnectés à l'extérieur de la puce. Une alternative aux convertisseurs conventionnels est leconvertisseur à capacités commutés, qui a l'avantage d'être facilement intégrable sur silicium.Toutefois, il présente des limitations à cause de la dépendance du facteur de conversion avec lenombre de condensateurs. De plus, les pertes inhérentes à la charge et à la décharge descondensateurs font diminuer son rendement. Il est donc intéressant de trouver une nouvellealternative pour concevoir un convertisseur DC/DC compact et performant afin d'obtenir un circuitélectronique complètement intégrable sur silicium.Le sujet de cette thèse répond au besoin d'une nouvelle méthode de conversion DC/DCintégrable sur silicium et à haut rendement. L'idée est d'utiliser une capacité variable mécaniquementà la place d'une inductance pour stocker l'énergie électrique transitoire. Le condensateur variable serafabriqué par des procédés de fabrication de microsystème MEMS sur silicium ce qui permet d'intégrerla totalité du convertisseur.Dans ce mémoire, nous expliquons tout d'abord le principe et le fonctionnement d'un abaisseur etd'un élévateur de tension utilisant notre nouvelle approche. Par la suite, nous présentons laconception et la fabrication d'un MEMS adapté à la conversion de tension. Finalement, nousexpliquons notre méthode de contrôle utilisant une commutation à zéro de tension. Le rendement d'unélévateur 10V-20V obtenu par simulation est de l'ordre de 88% lorsque la gestion électrique estréalisée avec des composants discrets. Ce rendement très prometteur, devrait être amélioré dans lefutur lorsque tout le système sera intégré sur silicium.
Book Synopsis Conception systémique pour la conversion d’énergie électrique 1 : gestion, analyse et synthèse by : ROBOAM Xavier
Download or read book Conception systémique pour la conversion d’énergie électrique 1 : gestion, analyse et synthèse written by ROBOAM Xavier and published by Lavoisier. This book was released on 2012-11-06 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: Le contexte actuel mène les concepteurs vers des systèmes toujours plus complexes et performants, intégrant un grand nombre d’éléments souvent fortement couplés et appartenant à divers champs de la physique énergétique. Après une présentation de l’approche systémique de conception, ce premier volume rassemble les points-clés permettant de modéliser et de caractériser efficacement des systèmes multiphysiques (formalismes graphiques, Bond Graphs, GIC/REM), d’analyser la qualité et la stabilité des réseaux et de contribuer à la robustesse en conception intégrée. La gestion de l’énergie des systèmes énergétiques hybrides incluant du stockage est également largement détaillée et différentes méthodes statistiques permettant de dimensionner les réseaux ou de caractériser leur sûreté de fonctionnement sont proposées (par exemple, la méthode de Monte-Carlo). Les techniques d’analyse, de synthèse et de gestion présentées dans cet ouvrage participent à l’optimisation des systèmes énergétiques. Elles sont complétées par des approches spécifiquement orientées vers la conception par optimisation, objets du second volume.
Book Synopsis Design and Implementation of Fully-Integrated Inductive DC-DC Converters in Standard CMOS by : Mike Wens
Download or read book Design and Implementation of Fully-Integrated Inductive DC-DC Converters in Standard CMOS written by Mike Wens and published by Springer Science & Business Media. This book was released on 2011-05-10 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: CMOS DC-DC Converters aims to provide a comprehensive dissertation on the matter of monolithic inductive Direct-Current to Direct-Current (DC-DC) converters. For this purpose seven chapters are defined which will allow the designer to gain specific knowledge on the design and implementation of monolithic inductive DC-DC converters, starting from the very basics.
Book Synopsis Autonomous Horizons by : Greg Zacharias
Download or read book Autonomous Horizons written by Greg Zacharias and published by Independently Published. This book was released on 2019-04-05 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dr. Greg Zacharias, former Chief Scientist of the United States Air Force (2015-18), explores next steps in autonomous systems (AS) development, fielding, and training. Rapid advances in AS development and artificial intelligence (AI) research will change how we think about machines, whether they are individual vehicle platforms or networked enterprises. The payoff will be considerable, affording the US military significant protection for aviators, greater effectiveness in employment, and unlimited opportunities for novel and disruptive concepts of operations. Autonomous Horizons: The Way Forward identifies issues and makes recommendations for the Air Force to take full advantage of this transformational technology.
Book Synopsis Tolerable upper intake levels for vitamins and minerals by : European Commission. Scientific Committee on Food
Download or read book Tolerable upper intake levels for vitamins and minerals written by European Commission. Scientific Committee on Food and published by . This book was released on 2006 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Converging Technologies for Improving Human Performance by : Mihail C. Roco
Download or read book Converging Technologies for Improving Human Performance written by Mihail C. Roco and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 477 pages. Available in PDF, EPUB and Kindle. Book excerpt: M. C. Roco and W.S. Bainbridge In the early decades of the 21st century, concentrated efforts can unify science based on the unity of nature, thereby advancing the combination of nanotechnology, biotechnology, information technology, and new technologies based in cognitive science. With proper attention to ethical issues and societal needs, converging in human abilities, societal technologies could achieve a tremendous improvement outcomes, the nation's productivity, and the quality of life. This is a broad, cross cutting, emerging and timely opportunity of interest to individuals, society and humanity in the long term. The phrase "convergent technologies" refers to the synergistic combination of four major "NBIC" (nano-bio-info-cogno) provinces of science and technology, each of which is currently progressing at a rapid rate: (a) nanoscience and nanotechnology; (b) biotechnology and biomedicine, including genetic engineering; (c) information technology, including advanced computing and communications; (d) cognitive science, including cognitive neuroscience. Timely and Broad Opportunity. Convergence of diverse technologies is based on material unity at the nanoscale and on technology integration from that scale.
Book Synopsis 30th European Microwave Conference by :
Download or read book 30th European Microwave Conference written by and published by . This book was released on 2000 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Microsystem Design by : Stephen D. Senturia
Download or read book Microsystem Design written by Stephen D. Senturia and published by Springer Science & Business Media. This book was released on 2005-12-20 with total page 699 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is a real pleasure to write the Foreword for this book, both because I have known and respected its author for many years and because I expect this book’s publication will mark an important milestone in the continuing worldwide development of microsystems. By bringing together all aspects of microsystem design, it can be expected to facilitate the training of not only a new generation of engineers, but perhaps a whole new type of engineer – one capable of addressing the complex range of problems involved in reducing entire systems to the micro- and nano-domains. This book breaks down disciplinary barriers to set the stage for systems we do not even dream of today. Microsystems have a long history, dating back to the earliest days of mic- electronics. While integrated circuits developed in the early 1960s, a number of laboratories worked to use the same technology base to form integrated sensors. The idea was to reduce cost and perhaps put the sensors and circuits together on the same chip. By the late-60s, integrated MOS-photodiode arrays had been developed for visible imaging, and silicon etching was being used to create thin diaphragms that could convert pressure into an electrical signal. By 1970, selective anisotropic etching was being used for diaphragm formation, retaining a thick silicon rim to absorb package-induced stresses. Impurity- and electrochemically-based etch-stops soon emerged, and "bulk micromachining" came into its own.
Book Synopsis Historical Painting Techniques, Materials, and Studio Practice by : Arie Wallert
Download or read book Historical Painting Techniques, Materials, and Studio Practice written by Arie Wallert and published by Getty Publications. This book was released on 1995-08-24 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bridging the fields of conservation, art history, and museum curating, this volume contains the principal papers from an international symposium titled "Historical Painting Techniques, Materials, and Studio Practice" at the University of Leiden in Amsterdam, Netherlands, from June 26 to 29, 1995. The symposium—designed for art historians, conservators, conservation scientists, and museum curators worldwide—was organized by the Department of Art History at the University of Leiden and the Art History Department of the Central Research Laboratory for Objects of Art and Science in Amsterdam. Twenty-five contributors representing museums and conservation institutions throughout the world provide recent research on historical painting techniques, including wall painting and polychrome sculpture. Topics cover the latest art historical research and scientific analyses of original techniques and materials, as well as historical sources, such as medieval treatises and descriptions of painting techniques in historical literature. Chapters include the painting methods of Rembrandt and Vermeer, Dutch 17th-century landscape painting, wall paintings in English churches, Chinese paintings on paper and canvas, and Tibetan thangkas. Color plates and black-and-white photographs illustrate works from the Middle Ages to the 20th century.
Download or read book The Last Utopia written by Samuel Moyn and published by Harvard University Press. This book was released on 2012-03-05 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: Human rights offer a vision of international justice that today’s idealistic millions hold dear. Yet the very concept on which the movement is based became familiar only a few decades ago when it profoundly reshaped our hopes for an improved humanity. In this pioneering book, Samuel Moyn elevates that extraordinary transformation to center stage and asks what it reveals about the ideal’s troubled present and uncertain future. For some, human rights stretch back to the dawn of Western civilization, the age of the American and French Revolutions, or the post–World War II moment when the Universal Declaration of Human Rights was framed. Revisiting these episodes in a dramatic tour of humanity’s moral history, The Last Utopia shows that it was in the decade after 1968 that human rights began to make sense to broad communities of people as the proper cause of justice. Across eastern and western Europe, as well as throughout the United States and Latin America, human rights crystallized in a few short years as social activism and political rhetoric moved it from the hallways of the United Nations to the global forefront. It was on the ruins of earlier political utopias, Moyn argues, that human rights achieved contemporary prominence. The morality of individual rights substituted for the soiled political dreams of revolutionary communism and nationalism as international law became an alternative to popular struggle and bloody violence. But as the ideal of human rights enters into rival political agendas, it requires more vigilance and scrutiny than when it became the watchword of our hopes.
Book Synopsis Continuous-Time Sigma-Delta A/D Conversion by : Friedel Gerfers
Download or read book Continuous-Time Sigma-Delta A/D Conversion written by Friedel Gerfers and published by Springer Science & Business Media. This book was released on 2006-02-27 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sigma-delta A/D converters are a key building block in wireless and multimedia applications. This comprehensive book deals with all relevant aspects arising during the analysis, design and simulation of the now widespread continuous-time implementations of sigma-delta modulators. The results of several years of research by the authors in the field of CT sigma-delta modulators are covered, including the analysis and modeling of different CT modulator architectures, CT/DT loop filter synthesis, a detailed error analysis of all components, and possible compensation/correction schemes for the non-ideal behavior in CT sigma-delta modulators. Guidance for obtaining low-power consumption and several practical implementations are also presented. It is shown that all the proposed new theories, architectures and possible correction techniques have been confirmed by measurements on discrete or integrated circuits. Quantitative results are also provided, thus enabling prediction of the resulting accuracy.
Author :Jordi Colomer-Farrarons Publisher :Springer Science & Business Media ISBN 13 :9400706863 Total Pages :169 pages Book Rating :4.4/5 (7 download)
Book Synopsis A CMOS Self-Powered Front-End Architecture for Subcutaneous Event-Detector Devices by : Jordi Colomer-Farrarons
Download or read book A CMOS Self-Powered Front-End Architecture for Subcutaneous Event-Detector Devices written by Jordi Colomer-Farrarons and published by Springer Science & Business Media. This book was released on 2011-02-17 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt: A CMOS Self-Powered Front-End Architecture for Subcutaneous Event-Detector Devices presents the conception and prototype realization of a Self-Powered architecture for subcutaneous detector devices. The architecture is designed to work as a true/false (event detector) or threshold level alarm of some substances, ions, etc... that are detected through a three-electrodes amperometric BioSensor approach. The device is envisaged as a Low-Power subcutaneous implantable application powered by an inductive link, one emitter antenna at the external side of the skin and the receiver antenna under the skin. The sensor is controlled with a Potentiostat circuit and then, a post-processing unit detects the desired levels and activates the transmission via a backscattering method by the inductive link. All the instrumentation, except the power module, is implemented in the so called BioChip. Following the idea of the powering link to harvest energy of the magnetic induced link at the implanted device, a Multi-Harvesting Power Chip (MHPC) has been also designed.
Download or read book Republican Like Me written by Ken Stern and published by HarperCollins. This book was released on 2017-10-24 with total page 261 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this controversial National Bestseller, the former CEO of NPR sets out for conservative America wondering why these people are so wrong about everything. It turns out, they aren’t. Ken Stern watched the increasing polarization of our country with growing concern. As a longtime partisan Democrat himself, he felt forced to acknowledge that his own views were too parochial, too absent of any exposure to the “other side.” In fact, his urban neighborhood is so liberal, he couldn’t find a single Republican--even by asking around. So for one year, he crossed the aisle to spend time listening, talking, and praying with Republicans of all stripes. With his mind open and his dial tuned to the right, he went to evangelical churches, shot a hog in Texas, stood in pit row at a NASCAR race, hung out at Tea Party meetings and sat in on Steve Bannon’s radio show. He also read up on conservative wonkery and consulted with the smartest people the right has to offer. What happens when a liberal sets out to look at issues from a conservative perspective? Some of his dearly cherished assumptions about the right slipped away. Republican Like Me reveals what lead him to change his mind, and his view of an increasingly polarized America.
Download or read book MEMS Sensors written by Siva Yellampalli and published by BoD – Books on Demand. This book was released on 2018-07-18 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: MEMS by becoming a part of various applications ranging from smartphones to automobiles has become an integral part of our everyday life. MEMS is building synergy between previously unrelated fields such as biology, microelectronics and communications, to improve the quality of human life. The sensors in MEMS gather information from the surrounding, which is then processed by the electronics for decision-making to control the environment. MEMS offers opportunities to miniaturize devices, integrate them with electronics and realize cost savings through batch fabrication. MEMS technology has enhanced many important applications in domains such as consumer electronics, biotechnology and communication and it holds great promise for continued contributions in the future. This book focuses on understanding the design, development and various applications of MEMS sensors.
Book Synopsis Français Interactif by : Karen Kelton
Download or read book Français Interactif written by Karen Kelton and published by . This book was released on 2019-08-15 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook includes all 13 chapters of Français interactif. It accompanies www.laits.utexas.edu/fi, the web-based French program developed and in use at the University of Texas since 2004, and its companion site, Tex's French Grammar (2000) www.laits.utexas.edu/tex/ Français interactif is an open acess site, a free and open multimedia resources, which requires neither password nor fees. Français interactif has been funded and created by Liberal Arts Instructional Technology Services at the University of Texas, and is currently supported by COERLL, the Center for Open Educational Resources and Language Learning UT-Austin, and the U.S. Department of Education Fund for the Improvement of Post-Secondary Education (FIPSE Grant P116B070251) as an example of the open access initiative.
Book Synopsis World Report 2019 by : Human Rights Watch
Download or read book World Report 2019 written by Human Rights Watch and published by Seven Stories Press. This book was released on 2019-02-05 with total page 957 pages. Available in PDF, EPUB and Kindle. Book excerpt: The best country-by-country assessment of human rights. The human rights records of more than ninety countries and territories are put into perspective in Human Rights Watch's signature yearly report. Reflecting extensive investigative work undertaken by Human Rights Watch staff, in close partnership with domestic human rights activists, the annual World Report is an invaluable resource for journalists, diplomats, and citizens, and is a must-read for anyone interested in the fight to protect human rights in every corner of the globe.
Book Synopsis Hendrik Petrus Berlage by : Hendrik Petrus Berlage
Download or read book Hendrik Petrus Berlage written by Hendrik Petrus Berlage and published by Getty Publications. This book was released on 1996-01-01 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hendrik Petrus Berlage, the Dutch architect and architectural philosopher, created a series of buildings and a body of writings from 1886 to 1909 that were among the first efforts to probe the problems and possibilities of modernism. Although his Amsterdam Stock Exchange, with its rational mastery of materials and space, has long been celebrated for its seminal influence on the architecture of the 20th century, Berlage's writings are highlighted here. Bringing together Berlage's most important texts, among them "Thoughts on Style in Architecture", "Architecture's Place in Modern Aesthetics", and "Art and Society", this volume presents a chapter in the history of European modernism. In his introduction, Iain Boyd Whyte demonstrates that the substantial contribution of Berlage's designs to modern architecture cannot be fully appreciated without an understanding of the aesthetic principles first laid out in his writings.
