Download or read book Fibres optiques polymeres pour reseaux locaux etude de leur diffusion et developpement de composants pour applications a l automobile written by Karine Michelet (juriste).) and published by . This book was released on 1996 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fibres optiques polym res pour r seaux locaux written by Karine Michelet and published by . This book was released on 1996 with total page 231 pages. Available in PDF, EPUB and Kindle. Book excerpt: LES FIBRES OPTIQUES POLYMERES DONT LE CUR EST PMMA PRESENTENT UNE ATTENUATION ELEVEE LIEE A DES PHENOMENES D'ORIGINE INTRINSEQUE (C.A.D. INHERENTS AU MATERIAU) OU EXTRINSEQUE. LES PRINCIPAUX MECANISMES SUSCEPTIBLES D'ETRE RESPONSABLES DE CES PERTES SONT L'ABSORPTION ET LA DIFFUSION. LE BUT DE LA PREMIERE PARTIE DE CETTE THESE A CONSISTE A ETUDIER LA DIFFUSION PAR LE CUR ET PAR LA GAINE OPTIQUE PAR LE BIAIS DE LA MESURE DE LA REPARTITION ANGULAIRE DE L'INTENSITE DIFFUSEE. A CETTE OCCASION, NOUS AVONS MONTRE QUE L'EXISTENCE AU PREALABLE DE LA GAINE MECANIQUE MODIFIE LE MECANISME DE DIFFUSION. IL A ETE EMIS L'HYPOTHESE QUE CETTE PROTECTION MECANIQUE POURRAIT EXERCER DES CONTRAINTES SUR LA FIBRE ET ENGENDRAIT DES FLUCTUATIONS SUPPLEMENTAIRES DE DENSITE. UNE ETUDE BIBLIOGRAPHIQUE DE LA DIFFUSION DANS LES FIBRES SILICE ET DANS LES POLYMERES NOUS A ORIENTE VERS LES THEORIES DE RAYLEIGH, RAYLEIGH-GANS ET DEBYE-BUECHE. CES 2 DERNIERS MODELES NOUS ONT PERMIS D'ACCEDER A LA TAILLE DES CENTRES DIFFUSANTS PRESENTS DANS LE CUR ET DANS LA GAINE OPTIQUE. LES MESURES EFFECTUEES CONFIRMENT QUE LA GAINE OPTIQUE EST PLUS DIFFUSANTE QUE LE CUR PUISQUE LA DIMENSION DES DEFAUTS DE LA GAINE EST 10 FOIS PLUS ELEVEE QUE CELLE DES DEFAUTS DU CUR DES FIBRES ETUDIEES. LE ROLE DE LA DIFFUSION EN TANT QUE PROCESSUS DE COUPLAGE DE MODES A EGALEMENT ETE ETUDIE. LE MODELE THEORIQUE DEVELOPPE A CET EFFET SUGGERE L'IMPORTANCE DE LA DIFFUSION A L'INTERFACE CUR-GAINE. DANS LA DEUXIEME PARTIE DE CE MEMOIRE EST ABORDE L'EMPLOI DES FIBRES OPTIQUES POLYMERES COMME SUPPORT DE TRANSMISSION DE DONNEES DANS UN RESEAU LOCAL. UNE ETUDE EXPERIMENTALE ET THEORIQUE DES EFFETS DE CONVERSION DE MODES RESULTANT DE LA PRESENCE DE COURBURES EST DECRITE DANS LE BUT DE FAIRE UNE ESTIMATION PREVISIONNELLE CORRECTE D'UN BILAN DE LIAISON. ENFIN, LE DEVELOPPEMENT D'UN CONNECTEUR DESTINE A FACILITER LE CABLAGE PAR FIBRES PLASTIQUES D'UN VEHICULE AUTOMOBILE EST EXPOSE AINSI QU'UNE TECHNIQUE SIMPLE DE SOUDURE. LE CONNECTEUR DONT LE PRINCIPE REPOSE SUR UN GUIDAGE METALLIQUE EST CARACTERISE PAR UNE GRANDE TOLERANCE DE POSITIONNEMENT DES FIBRES ET PAR DES PERTES MODEREES (INFERIEURES A 1,5 DB POUR UNE DISTANCE ENTRE LES FIBRES DE 2 MM). QUANT A LA SOUDURE DE FIBRES PLASTIQUES DONT LE CUR EST EN PMMA, ELLE CORRESPOND A UN PROCEDE THERMIQUE PERMETTANT D'OBTENIR DES PERTES MOYENNES D'INSERTION DE 0,4 DB SANS AVOIR A POLIR DES FIBRES A RACCORDER
Download or read book Adhesion Between Polymers and Concrete Adh sion Entre Polym res Et B ton written by H. R. Sasse and published by Springer. This book was released on 1986 with total page 792 pages. Available in PDF, EPUB and Kindle. Book excerpt: Preface Adhesion is a phenomenon architects and civil engineers are not very familiar with. In other disciplines knowledge about surface properties and the background of bonding energies is also far from satisfactory; nevertheless there are many important· applications in concrete engineering, where adhesion is necessary for success and durability. These include: - coating and painting - repair of concrete surfaces - bonding of fresh to old concrete - crack injection - glueing of precast elements - glueing of steel to concrete, etc. In 1981 RILEM established the technical committee 52-RAC 'Resin Adherence to Concrete'. The main aims of the committee's work were - to collect research results and practical experiences - to initiate and coordinate research programs - to develop, on a scientific base, test methods for field and for laboratory purposes. One of the results of the committee's work is a state-of-the-art report, which will be presented orally as a General Report at the International Symposium ISAP '86, and will be printed either in the RILEM journal Materials and Structures or separately. Several test recommendations have been elaborated and will be prepared as drafts for the participants ofISAP '86. These are: - direct tensile test - pull-off test - direct shear test - slant shear test - four-point bending test - dynamic loading test - thermal compatibility test (two versions) - injectibility test.
Download or read book Terra 2008 written by Leslie Rainer and published by Getty Publications. This book was released on 2011-06-14 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: Earthen architecture constitutes one of the most diverse forms of cultural heritage and one of the most challenging to preserve. It dates from all periods and is found on all continents but is particularly prevalent in Africa, where it has been a building tradition for centuries. Sites range from ancestral cities in Mali to the palaces of Abomey in Benin, from monuments and mosques in Iran and Buddhist temples on the Silk Road to Spanish missions in California. This volume's sixty-four papers address such themes as earthen architecture in Mali, the conservation of living sites, local knowledge systems and intangible aspects, seismic and other natural forces, the conservation and management of archaeological sites, research advances, and training.
Download or read book Chemistry of Lignocellulosics written by Taylor & Francis Group and published by CRC Press. This book was released on 2021-03-31 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the chemical properties of lignocellulosic fibers, knowledge of which is essential for innovation and sustainable development of their transformation. Thermochemical transformation of wood and other lignocellulosics is presented to highlight its volatile, liquid and solid products and their novel applications. Forest biorefinery is described to emphasize the new products from lignocellulosic constituents, both structural (cellulose, hemicelluloses and lignins) and those extraneous to cell walls-extractives. New developments in cellulose technology related to nanocellulose are discussed in relation to new applications. Industrial lignins are presented in detail, both in terms of extraction procedures from spent liquors and structural characterization of the isolated lignins. Application of lignocellulosic biopolymers in new composite materials, or in biomaterials for medicinal purposes, and in solid wood preservation, are described. The example of an industrial biorefinery installed in southwestern France more than 40 years ago is presented.
Download or read book Full Field Measurements and Identification in Solid Mechanics written by Michel Grediac and published by John Wiley & Sons. This book was released on 2012-12-17 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: This timely book presents cutting-edge developments by experts in the field on the rapidly developing and scientifically challenging area of full-field measurement techniques used in solid mechanics – including photoelasticity, grid methods, deflectometry, holography, speckle interferometry and digital image correlation. The evaluation of strains and the use of the measurements in subsequent parameter identification techniques to determine material properties are also presented. Since parametric identification techniques require a close coupling of theoretical models and experimental measurements, the book focuses on specific modeling approaches that include finite element model updating, the equilibrium gap method, constitutive equation gap method, virtual field method and reciprocity gap method. In the latter part of the book, the authors discuss two particular applications of selected methods that are of special interest to many investigators: the analysis of localized phenomenon and connections between microstructure and constitutive laws. The final chapter highlights infrared measurements and their use in the mechanics of materials. Written and edited by knowledgeable scientists, experts in their fields, this book will be a valuable resource for all students, faculties and scientists seeking to expand their understanding of an important, growing research area
Download or read book Artificial Intelligence in Society written by OECD and published by OECD Publishing. This book was released on 2019-06-11 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: The artificial intelligence (AI) landscape has evolved significantly from 1950 when Alan Turing first posed the question of whether machines can think. Today, AI is transforming societies and economies. It promises to generate productivity gains, improve well-being and help address global challenges, such as climate change, resource scarcity and health crises.
Download or read book Dictionary of Building and Civil Engineering written by Don Montague and published by Taylor & Francis. This book was released on 1996 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dual-language dictionary lists over 20,000 specialist terms in both French and English, covering architecture, building, engineering and property terms. It meets the needs of all building professionals working on projects overseas. It has been comprehensively researched and compiled to provide an invaluable reference source in an increasingly European marketplace.
Download or read book Epoxy Polymers written by Jean-Pierre Pascault and published by John Wiley & Sons. This book was released on 2009-12-09 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the only book to focus on new developments and innovations in this hot field international experts from industry and academia present everything scientists need to know. The first section provides general concepts of the synthesis and properties of epoxy polymers and serves as a basis for the subsequent chapters. The second section includes new types of epoxy polymers recently commercialized or not yet present on the market, while the third section includes chapters related to the capacity of generating controlled nanostructures in epoxy-based materials. A fourth section is devoted to innovations in epoxy-based materials such as adhesives, coatings, pre-pregs, structural foams, injection-molded products and self-healing epoxies. Concluding remarks and perspectives are discussed in a short final section. The result is a one-stop reference source, collecting scientific and technological breakthroughs otherwise spread over hundreds of publications, patents and reports.
Download or read book AGARD Conference Proceedings written by North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Poly lactic acid Science and Technology written by Alfonso Jiménez and published by Royal Society of Chemistry. This book was released on 2015 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive overview of the synthesis, characterisation, properties and applications of poly(lactic acid) science and technology covering scientific, ecological, social and economic issues.
Download or read book Poly Ethylene Glycol Chemistry written by J. Milton Harris and published by Springer Science & Business Media. This book was released on 2013-11-21 with total page 395 pages. Available in PDF, EPUB and Kindle. Book excerpt: The idea for this book came from discussions among participants in a symposium on biotechnical applications at the "Pacifichem 89" meeting in Honolulu. It was the majority opinion of this group that a volume dedicated to biotechnical and biomedical applications of PEG chemistry would enhance research and development in this area. Though the book was conceived at the Honolulu meeting, it is not a proceedings of this symposium. Several groups who did not participate in this meeting are repre sented in the book, and the book incorporates much work done after the meeting. The book does not include contributions in all related areas to which PEG chemistry has been applied. Several invited researchers declined to parti.:ipate, and there is not enough space in this single volume to properly cover all submissions. Chapter I-an overview of the topic-discusses in brief applications not given detailed coverage in specifically devoted chapters. The following topics are covered: introduction to and fundamental properties of PEG and derivatives in Chapters 1-3; separations using aqueous polymer two-phase partitioning in Chapters 4-6; PEG-proteins as catalysts in biotechnical applications in Chapters 7 and 8; biomedical applications of PEG-proteins in Chapters 9-13; PEG modified surfaces for a variety of biomedical and biotechnical applications in Chapters 14-20; and synthesis of new PEG derivatives in Chapters 21 and 22.
Download or read book General Relativity and Gravitational Waves written by Joseph Weber and published by Courier Corporation. This book was released on 2004-01-01 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: An internationally famous physicist and electrical engineer, the author of this text was a pioneer in the investigation of gravitational waves. Joseph Weber's General Relativity and Gravitational Waves offers a classic treatment of the subject. Appropriate for upper-level undergraduates and graduate students, this text remains ever relevant. Brief but thorough in its introduction to the foundations of general relativity, it also examines the elements of Riemannian geometry and tensor calculus applicable to this field. Approximately a quarter of the contents explores theoretical and experimental aspects of gravitational radiation. The final chapter focuses on selected topics related to general relativity, including the equations of motion, unified field theories, Friedman's solution of the cosmological problem, and the Hamiltonian formulation of general relativity. Exercises. Index.
Download or read book Aerosol Filtration written by Dominique Thomas and published by Elsevier. This book was released on 2016-11-30 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: Filtration of aerosols is omnipresent in our daily lives, in areas as diverse as health, the protection of people and the environment, and air treatment inside buildings. However, the collection of particles within a filter media is not, contrary to popular belief, linked to a simple screen effect. The phenomena involved are much more complex and require the consideration of aerosol interactions, filter media and process conditions to select the best fiber filter for a given application. Aerosol Filtration, book for students, hygiene or process engineers, fibrous media manufacturers, designers, and filtration system suppliers or users addresses the filtration of aerosols in six chapters. These chapters cover physics and aerosol characterization, the fibrous media, and efficiency and filter clogging by solid or liquid aerosols, with special attention to the filtration of the nanoparticles. - Analyses the behavior of fibrous media against solid and liquid aerosols - Presents models of efficiency and pressure drop - Introduces computing elements for estimating the lifetime of filters - Provides guidance for designing filters and predicting their behavior over time
Download or read book An Introduction To Plasmonics written by Olivier Pluchery and published by World Scientific. This book was released on 2023-08-28 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: What is a plasmon? Is it a particle, like a photon or a wave? Plasmonics stands at the frontier of condensed matter physics, which is the world of electrons, optics and of photons. Plasmonics is one of the most active fields in nanophotonics. This book begins by exploring the concepts behind waves, and the electromagnetic description of light when it interacts with metals; it dedicates every chapter thereafter to all aspects of plasmonics. In particular, the surface plasmon polariton wave is explained in full detail, as well as the localized surface plasmon resonance of metallic nanoparticles. The active research area opened by plasmonics, as well as its applications, are also briefly explained, such as advanced biosensing, subwavelength waveguiding, quantum plasmonics, nanoparticle-based cancer therapies, optical nano-antenna and high-efficiency photovoltaic cells.The book is adapted for graduate students and places a special emphasis on providing complete explanations of the fundamental concepts of plasmonics. Further, each of these concepts is illustrated with examples drawn from the most recent scientific literature. Each chapter ends with a set of exercises that will help the reader revise the concepts and go deeper into the world of plasmonics. More than 70 exercises are included.
Download or read book Gazette Du Bureau Des Brevets written by Canadian Intellectual Property Office. Patent Office and published by . This book was released on 1995 with total page 1454 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Fiber Optic Gyroscope Second Edition written by Herve C. Lefevre and published by Artech House. This book was released on 2014-10-01 with total page 413 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by one of the field’s leading experts, this landmark reference presents a thorough system analysis of the fiber-optic gyroscope (FOG), describing the concepts that have emerged as the preferred solutions for obtaining a practical device. This book’s first edition was published in the early 1990’s. If the basic design rules of the FOG have remained unchanged, the technology has certainly matured, and the expectations presented in the first edition have been largely exceeded. This second edition is updated throughout, featuring new content on Allan variance; testing with optical coherence domain polarimetry; the Shupe effect; and rare-Earth doped fiber ASE sources. In addition, brand new comprehensive appendixes cover the optics, single-mode fiber optics, and integrated optics necessary to understand the fiber gyro and provide an appropriate vocabulary for communicating with electronic component designers.
