Download or read book Strat gies innovatrices pour le contr le actif vibratoire du rayonnement acoustique de structures planes written by Patrice Masson and published by . This book was released on 1997 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Vibrations et rayonnement acoustique de structures planes complexes immerg es dans un fluide l ger ou dans un fluide lourd written by Alain Berry and published by . This book was released on 1991 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Contr le actif vibroacoustique de la transparence acoustique de structures planes avec des transducteurs pi zo lectriques written by Laurent Deschaintres and published by . This book was released on 2000 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt: On traite ici le problème théorique et expérimental du contrôle optimal par rétroaction (ou "feedback") de la transparence acoustique de plaques élastiques. La plaque considérée est encastrée dans une baie séparant deux salles anéchoïques et soumise à une excitation aérienne large bande stationnaire. Elle et équipée de capteurs et d'actionneurs piézoélectriques collées sur sa surface. Il s'agit donc d'un problème de contrôle actif structural acoustique, ou "contrôle vibroacoustique du rayonnement de structures", qui consiste à atténuer le champ acoustique rayonné par la plaque en minimisant les amplitudes des vibrations incriminées par des méthodes de contrôle actif. Après un travail d'analyse des phénomènes qui sont à l'origine des transmissions vibroacoutiques, la mise en oeuvre d'un algorithme de contrôle Linéaire Quadratique Gaussien est envisagée d'un point de vue théorique et pratique. Un algorithme LQG permet de prendre en compte un critère de minimisation adapté au problème posé et cette possibilité est exploitée afin d'atténuer le rayonnement acoustique à basses fréquences de la plaque. Le contrôle est expérimenté en temps réel pour différents critères de minimisation.... Les performances obtenues pour différentes configurations du système de contrôle sont comparées et montrent l'intérêt de l'usage de cet outil de simulation.
Download or read book Analyse multir solution en ondelettes du rayonnement acoustique des structures planes written by Maurice Martinet and published by . This book was released on 2001 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: Le rayonnement acoustique d'une structure vibrante est un phénomène complexe et en générale, on ne s'intéresse qu'au champ de pression émis loin de l'objet. Pour une structure plane bafflée finie, l'analyse ondulatoire, montre que seule une partie du champ vibratoire est à l'origine du bruit émis en champ lointain. Pour caractériser ce champ vibratoire à l'origine de la nuisance sonore, nos recherches ont porté sur l'analyse multirésolution en ondelettes (AMRO). Les ondelettes, par leur capacité filtrante dans l'espace des nombres d'ondes, permet l'obtention de sources acoustiques équivalentes. Leurs natures et leurs localisations dépendent alors de la résolution de la reconstruction et de la famille d'ondelettes analysantes. L'application de l'AMRO dans le cadre de rayonnement des modes de plaque, nous a permis de retrouver et de quantifier les notions empiriques de rayonnements par les coins ou par les bords. Sur une plaque soumise à différentes types d'excitations, les sources acoustiques équivalentes obtenues, approchent de manière très satisfaisante la pression rayonnée en champ lointain. Pour une force mécanique ponctuelle, elles sont principalement localisées à la périphérie et au point d'application. Pour une excitation par onde plane, on obtient des lignes de sources suivant l'angle d'incidence. Une expérimentation, sur une structure simple, a permis de valider la pression acoustique rayonnée par les sources équivalentes issues de l'AMRO. Ce travail ouvre des perspectives au contrôle actif du rayonnement acoustique.
Download or read book In Vessel Melt Retention and Ex Vessel Corium Cooling IAEA Tecdoc No 1906 written by International Atomic Energy Agency and published by International Atomic Energy Agency. This book was released on 2020-08-06 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication results from a technical meeting on phenomenology and technologies relevant to in-vessel melt retention (IVMR) and ex-vessel corium cooling (EVCC). The purpose of the publication is to capture the state of knowledge, at the time of that meeting, related to phenomenology and technologies as well as the challenges and pending issues relevant to IVMR and EVCC for water cooled reactors by summarizing the information provided by the meeting participants in a form useful to practitioners in Member States.
Download or read book X Ray and Neutron Reflectivity Principles and Applications written by Jean Daillant and published by Springer Science & Business Media. This book was released on 2003-07-01 with total page 347 pages. Available in PDF, EPUB and Kindle. Book excerpt: The reflection of and neutrons from surfaces has existed as an x-rays exp- imental for almost it is in the last technique fifty Nevertheless, only years. decade that these methods have become as of enormously popular probes This the surfaces and interfaces. to be due to of several appears convergence of intense different circumstances. These include the more n- availability be measured orders tron and sources that can over (so reflectivity x-ray many of and the much weaker surface diffuse can now also be magnitude scattering of thin films and studied in some the detail); growing importance multil- basic the realization of the ers in both and technology research; important which in the of surfaces and and role roughness plays properties interfaces; the of statistical models to characterize the of finally development topology its and its characterization from on roughness, dependence growth processes The of and to surface scattering experiments. ability x-rays neutro4s study four five orders of in scale of surfaces over to magnitude length regardless their and also their to ability probe environment, temperature, pressure, etc. , makes these the choice for buried interfaces often probes preferred obtaining information about the microstructure of often in statistical a global surfaces, the local This is manner to complementary imaging microscopy techniques, of such studies in the literature witnessed the veritable by explosion published the last few Thus these lectures will useful for over a resource years.
Download or read book Flexoelectricity in Liquid Crystals written by Agnes Buka and published by World Scientific. This book was released on 2013 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book intends to give a state-of-the-art overview of flexoelectricity, a linear physical coupling between mechanical (orientational) deformations and electric polarization, which is specific to systems with orientational order, such as liquid crystals. Chapters written by experts in the field shed light on theoretical as well as experimental aspects of research carried out since the discovery of flexoelectricity. Besides a common macroscopic (continuum) description the microscopic theory of flexoelectricity is also addressed. Electro-optic effects due to or modified by flexoelectricity as well as various (direct and indirect) measurement methods are discussed. Special emphasis is given to the role of flexoelectricity in pattern-forming instabilities. While the main focus of the book lies in flexoelectricity in nematic liquid crystals, peculiarities of other mesophases (bent-core systems, cholesterics, and smectics) are also reviewed. Flexoelectricity has relevance to biological (living) systems and can also offer possibilities for technical applications. The basics of these two interdisciplinary fields are also summarized.
Download or read book Physical Properties of Amorphous Materials written by David Adler and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Institute for Amorphous Studies was founded in 1982 as the international center for the investigation of amorphous mate rials. It has since played an important role in promoting the und er standing of disordered matter in general. An Institute lecture series on "Fundamentals of Amorphous Materials and Devices" was held during 1982-83 with distinguished speakers from universities and industry. These events were free and open to the public ,and were attended by many representatives of the scientific community. The lectures themselves were highly successful inasmuch as they provided not only formal instruction but also an opportunity for vigorous and stimulating debate. That last element could not be captured within the pages of a book I but the lectures concentrated on the latest advances in the field I which is why their essential contents are he re reproduced in collective form. Together they constitute an interdisciplinary status report of the field. The speakers brought many different viewpoints and a variety of back ground experiences io bear on the problems involved I but though language and conventions vary I the essential unity of the concerns is very clear I as indeed are the ultimate benefits of the many-sided approach.
Download or read book Nonlinear Optical Materials written by Jerome V. Moloney and published by Springer Science & Business Media. This book was released on 1998-08-13 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mathematical methods play a significant role in the rapidly growing field of nonlinear optical materials. This volume discusses a number of successful or promising contributions. The overall theme of this volume is twofold: (1) the challenges faced in computing and optimizing nonlinear optical material properties; and (2) the exploitation of these properties in important areas of application. These include the design of optical amplifiers and lasers, as well as novel optical switches. Research topics in this volume include how to exploit the magnetooptic effect, how to work with the nonlinear optical response of materials, how to predict laser-induced breakdown in efficient optical devices, and how to handle electron cloud distortion in femtosecond processes.
Download or read book Attention la marche written by Bertrand Gervais and published by . This book was released on 2020 with total page 630 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Radio Drama written by Tim Crook and published by Routledge. This book was released on 2002-01-04 with total page 309 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radio Drama brings together the practical skills needed for radio drams, such as directing, writing and sound design, with media history and communication theory. Challenging the belief that sound drama is a 'blind medium', Radio Drama shows how experimentation in radio narrative has blurred the dividing line between fiction and reality in modern media. Using extracts from scripts and analysing radio broadcasts from America, Britain, Canada and Australia, the book explores the practicalities of producing drama for radio. Tim Crook illustrates how far radio drama has developed since the first 'audiophonic production' and evaluates the future of radio drama in the age of live phone-ins and immedate access to programmes on the Internet.
Download or read book Race Sounds written by Nicole Brittingham Furlonge and published by University of Iowa Press. This book was released on 2018-05-15 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: Forging new ideas about the relationship between race and sound, Furlonge explores how black artists--including well-known figures such as writers Ralph Ellison and Zora Neale Hurston, and singers Bettye LaVette and Aretha Franklin, among others--imagine listening. Drawing from a multimedia archive, Furlonge examines how many of the texts call on readers to "listen in print." In the process, she gives us a new way to read and interpret these canonical, aurally inflected texts, and demonstrates how listening allows us to engage with the sonic lives of difference as readers, thinkers, and citizens.
Download or read book Understanding Digital Culture written by Vincent Miller and published by SAGE. This book was released on 2012-08-15 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This is an outstanding book. It is one of only a few scholarly texts that successfully combine a nuanced theoretical understanding of the digital age with empirical case studies of contemporary media culture. The scope is impressive, ranging from questions of digital inequality to emergent forms of cyberpolitics." - Nick Gane, York University "Well written, very up-to-date with a good balance of examples and theory. It′s good to have all the major issues covered in one book." - Peter Millard, Portsmouth University "This is just the text I was looking for to enable first year undergraduates to develop their critical understanding of the technologies they have embedded so completely in their lives." - Chris Simpson, University College of St Mark & St John This is more than just another book on Internet studies. Tracing the pervasive influence of ′digital culture′ throughout contemporary life, this text integrates socio-economic understandings of the ′information society′ with the cultural studies approach to production, use, and consumption of digital media and multimedia. Refreshingly readable and packed with examples from profiling databases and mashups to cybersex and the truth about social networking, Understanding Digital Culture: Crosses disciplines to give a balanced account of the social, economic and cultural dimensions of the information society. Illuminates the increasing importance of mobile, wireless and converged media technologies in everyday life. Unpacks how the information society is transforming and challenging traditional notions of crime, resistance, war and protest, community, intimacy and belonging. Charts the changing cultural forms associated with new media and its consumption, including music, gaming, microblogging and online identity. Illustrates the above through a series of contemporary, in-depth case studies of digital culture. This is the perfect text for students looking for a full account of the information society, virtual cultures, sociology of the Internet and new media.
Download or read book They Became what They Beheld written by Edmund Carpenter and published by . This book was released on 1970 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Through text and photography, They Became What They Beheld brings into vivid focus the changed sense of self and world that now marks modern life—most expressively in the young. Why long hair? Why the turn to drugs and the inner trip? But the changes do not only affect the young, they are part of all of us. Why the new, intense concern with fashion? Why the rapid expansion of the old limits of what was "proper"? Why that "gap" that divides the generations? The book takes the form of a notebook of images and commentaries juxtaposed in dramatic contrasts and continuities. Its rhythms are more concentrated and more violent than those experienced in conventional work. They belong to the world of icon, graffiti, cartoon—our world."--
Download or read book Reality Radio written by John Biewen and published by Univ of North Carolina Press. This book was released on 2010-03-15 with total page 223 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the last few decades, the radio documentary has developed into a strikingly vibrant form of creative expression. Millions of listeners hear arresting, intimate storytelling from an ever-widening array of producers on programs including This American Life, StoryCorps, and Radio Lab; online through such sites as Transom, the Public Radio Exchange, Hearing Voices, and Soundprint; and through a growing collection of podcasts. Reality Radio celebrates today's best audio documentary work by bringing together some of the most influential and innovative practitioners from the United States, Canada, the United Kingdom, and Australia. In these nineteen essays, documentary artists tell--and demonstrate, through stories and transcripts--how they make radio the way they do, and why. Whether the contributors to the volume call themselves journalists, storytellers, even audio artists--and although their essays are just as diverse in content and approach--all use sound to tell true stories, artfully. Contributors: Jad Abumrad Jay Allison damali ayo John Biewen Emily Botein Chris Brookes Scott Carrier Katie Davis Sherre DeLys Lena Eckert-Erdheim Ira Glass Alan Hall Natalie Kestecher The Kitchen Sisters Maria Martin Karen Michel Rick Moody Joe Richman Dmae Roberts Stephen Smith Sandy Tolan
Download or read book Contemporary Art and Memory written by Joan Gibbons and published by Bloomsbury Publishing. This book was released on 2007-12-19 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Whether exploring the intimate recollections which make up the artist's own life history or questioning the way the gallery and museum present public memory, contemporary art, it would seem, is haunted by the past. "Contemporary Art and Memory" is the first accessible survey book to explore the subject of memory as it appears in its many guises in contemporary art. Looking at both personal and public memory, Gibbons explores art as autobiography, the memory as trace, the role of the archive, revisionist memory and postmemory, as well as the absence of memory in oblivion. Grounding her discussion in historical precedents, Gibbons explores the work of a wide range of international artists including Yinka Shonibare MBE, Doris Salcedo, Keith Piper, Jeremy Deller, Judy Chicago, Louise Bourgeois, Tracey Emin, Felix Gonzalez-Torres, Christian Boltanski, Janet Cardiff, Bill Fontana, Pierre Huyghe, Susan Hiller, Japanese photographer Miyako Ishiuchi and new media artist George Legrady."Contemporary Art and Memory" will be indispensable to all those concerned with the ways in which artists represent and remember the past.?????
Download or read book Place Space and Hermeneutics written by Bruce B. Janz and published by Springer. This book was released on 2017-03-29 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book analyzes the hermeneutics of place, raising questions about central issues such as textuality, dialogue, and play. It discusses the central figures in the development of hermeneutics and place, and surveys disciplines and areas in which a hermeneutic approach to place has been fruitful. It covers the range of philosophical hermeneutic theory, both within philosophy itself as well as from other disciplines. In doing so, the volume reflects the state of theorization on these issues, and also looks forward to the implications and opportunities that exist. Philosophical hermeneutics has fundamentally altered philosophy’s approach to place. Issues such as how we dwell in place, how place is imagined, created, preserved, and lost, and how philosophy itself exists in place have become central. While there is much research applying hermeneutics to place, there is little which both reflects on that heritage and critically analyzes a hermeneutic approach to place. This book fills that void by offering a sustained analysis of the central elements, major figures, and disciplinary applications of hermeneutics and place.
