Download or read book Elaboration d une m thode diff rentielle pour l tude des fibres optiques microstructur es written by Philippe Boyer (auteur d'une thèse de physique (2006)) and published by . This book was released on 2006 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: Le travail de thèse présenté dans ce mémoire décrit le développement d'une méthode numérique élaborée dans le but d'étudier la propagation de la lumière dans des objets de géométrie cylindrique. Ce document est divisé en deux parties. La première partie introduit les équations de base de la dernière version de la méthode différentielle (méthode de la « factorisation de Fourier rapide ») dans le système de coordonnées cylindriques. Les tests numériques valident confortablement cette théorie aussi bien dans le cas de la diffraction classique (TE et TM) que dans le cas de la diffraction conique. Parallèlement à ces travaux, une nouvelle méthode numérique est proposée, permettant de modéliser la diffraction de la lumière par un cylindre circulaire anisotrope. Elle a été implémentée et validée avec succès. La seconde partie est essentiellement consacrée à la modélisation des fibres optiques microstructurées afin d'étudier leurs propriétés de guidage des modes à pertes qui s'y propagent. Un formalisme relatif à la méthode utilisée est écrit en tenant compte des propriétés de symétrie opto-géométrique présentes dans ce genre de guide d'onde. Les résultats très satisfaisants montrent en particulier que la méthode différentielle appartient à la famille restreinte des méthodes numériques pouvant déterminer avec précision à la fois la partie réelle et la partie imaginaire (pertes) de l'indice effectif des modes recherchés. La méthode différentielle présente l'avantage de pouvoir considérer des sections arbitraires pour les objets diffractants (les inclusions dans le cas des fibres optiques microstructurées). Cette méthode permet aussi l'étude d'objets constitués de matériaux inhomogènes et/ou anisotropes. En particulier, nous nous sommes intéressés à une fibre optique microstructurée de type « Antiresonant Reflecting Optical Waveguide» dont les inclusions circulaires possèdent un gradient d'indice parabolique. La comparaison des résultats numériques avec des mesures expérimentales est très encourageante.
Download or read book Encapsulations written by Alexandru Grumezescu and published by Academic Press. This book was released on 2016-05-27 with total page 926 pages. Available in PDF, EPUB and Kindle. Book excerpt: Encapsulations, a volume in the Nanotechnology in the Agri-Food Industry series,presents key elements in establishing food quality through the improvement of food flavor and aroma. The major benefits of nanoencapsulation for food ingredients include improvement in bioavailability of flavor and aroma ingredients, improvement in solubility of poor water-soluble ingredients, higher ingredient retention during production process, higher activity levels of encapsulated ingredients, improved shelf life, and controlled release of flavor and aroma. This volume discusses main nanoencapsulation processes such as spray drying, melt injection, extrusion, coacervation, and emulsification. The materials used in nanoencapsulation include lipids, proteins, carbohydrates, cellulose, gums, and food grade polymers. Applications and benefits of nanoencapsulation such as controlled release, protections, and taste masking will be explained in detail. Includes the most up-to-date information on nanoencapsulation and nanocontainer-based delivery of antimicrobials Presents nanomaterials for innovation based on scientific advancements in the field Provides control release strategies to enhance bioactivity, including methods and techniques for research and innovation Provides useful tools to improve the delivery of bioactive molecules and living cells into foods
Download or read book In Situ Gelling Polymers written by Xian Jun Loh and published by Springer. This book was released on 2014-10-01 with total page 229 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the research involving in situ gelling polymers and can be used as a guidebook for academics, industrialists and postgraduates interested in this area. This work summaries the academic contributions from the top authorities in the field and explore the fundamental principles of in situ gelling polymeric networks, along with examples of their major applications. This book aims to provide an up-to-date resource of in situ gelling polymer research.
Download or read book Wood Adhesives written by Antonio Pizzi and published by CRC Press. This book was released on 2011-01-07 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wood adhesives are of tremendous industrial importance, as more than two-thirds of wood products in the world today are completely or partially bonded together using a variety of adhesives. Adhesive bonding offers many advantages over other joining methods for wood components, and there has been a great deal of R& D activity in devising new wood adhesives or improving the existing ones. The modern mantra in all industrial sectors is: "think green, go green," which has attracted much attention in the wood adhesive industry. Therefore, there is also a lot of research activity in synthesizing environmentally benign and human-friendly wood adhesives. This book is divided into four parts: Part 1: Fundamental Adhesion Aspects in Wood Bonding; Part 2: Synthetic Adhesives; Part 3: Environment-friendly adhesives; and Part 4: Wood Welding and General Paper. It addresses many different types of wood adhesives, as well as bonding (welding) of wood components without adhesives, a more recent development. The information contained in this book is valuable for individuals engaged in all aspects of wood adhesion and adhesives and, hopefully, will inspire new ideas in wood adhesives, a topic of vital industrial importance.
Download or read book Modern Approaches to Terminological Theories and Applications written by Heribert Picht and published by Peter Lang. This book was released on 2006 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume comprises contributions originally presented at the 15th European Symposium on Languages for Special Purposes held at the University of Bergamo on 29 August - 2 September 2005. The volume is divided into four parts: Approaches to Terminological Theories; Terms in Discourse; Knowledge Elicitation, Ordering and Management; Term extraction and terminographical work. The research presented in the various contributions to this volume clearly indicates that terminology as an inter- and transdisciplinary field of knowledge is firmly developing its theoretical foundations and practical applications in accordance with and within the framework of its overall goal: to ensure and to augment the quality of communication with professional content.
Download or read book Advances in Polymer Science written by and published by . This book was released on 1985 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Languages for Special Purposes written by John Humbley and published by Walter de Gruyter GmbH & Co KG. This book was released on 2018-10-22 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook gives an overview of language for special purposes (LSP) in scientific, professional and other contexts, with particular focus on teaching and training. It provides insights into research paradigms, theories and methods while also highlighting the practical use of LSPs in concrete discourse situations. The volume is transdisciplinary oriented with a firm basis in the language sciences, including terminology, knowledge transfer, multilingual and cross-cultural exchange.
Download or read book Special Language written by Christer Laurén and published by Multilingual Matters. This book was released on 1989-01-01 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt: As the most advanced human thinking is expressed by special language there are exciting possibilities for research in which philosophical, semantic, semiotic, text-linguistic and pragmatic approaches are utilized.
Download or read book Greek Painted Pottery written by Robert Manuel Cook and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Athenian Vase Construction written by Toby Schreiber and published by Getty Publications. This book was released on 1999-05-27 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on her study of Greek pottery sherds and vases and on her profound hands-on knowledge of pottery construction techniques, including experiments with the potting of Attic shapes, Toby Schreiber describes how ancient Greek potters constructed their vases. Drawn in large part from vases and fragments in the collection of the Getty Museum, the many photographs that accompany the text show how much even seemingly insignificant sherds may reveal about technique when studied by someone knowledgeable about potting. The drawings - all done by the author - demonstrate step by step with admirable clarity how the potter executed his craft. Written by a master potter, this is a book both for those who know little or nothing about potting techniques and for those who already have an understanding of these matters.
Download or read book Formal Ontology in Information Systems written by Brandon Bennett and published by IOS Press. This book was released on 2006 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: Researchers in areas such as artificial intelligence, formal and computational linguistics, biomedical informatics, conceptual modeling, knowledge engineering and information retrieval have come to realize that a solid foundation for their research calls for serious work in ontology, understood as a general theory of the types of entities and relations that make up their respective domains of inquiry. In all these areas, attention is now being focused on the content of information rather than on just the formats and languages used to represent information. The clearest example of this development is provided by the many initiatives growing up around the project of the Semantic Web. And, as the need for integrating research in these different fields arises, so does the realization that strong principles for building well-founded ontologies might provide significant advantages over ad hoc, case-based solutions. The tools of formal ontology address precisely these needs, but a real effort is required in order to apply such philosophical tools to the domain of information systems. ontological questions which call for further philosophical investigations. The purpose of FOIS is to provide a forum for genuine interdisciplinary exchange in the spirit of a unified effort towards solving the problems of ontology, with an eye to both theoretical issues and concrete applications. This book contains a wide range of areas, all of which are important to the development of formal ontologies.
Download or read book Diamond Based Composites written by Mark A. Prelas and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: Diamond-based composites, with their advantages of hardness, high Young's modulus and the like, have demonstrated new and unusual features, such as stability to high temperatures and pressure shocks and a large internal surface that can be controlled to offer customised electrical, magnetic and optical properties, leading to efficient filters, absorbents, sensors and other tools for environmental control and monitoring. The current book covers the synthesis of materials, their characterization and properties, trends in high pressure and high temperature technologies, low pressure technologies, basic principles of DBC material science, and future developments in electronics, optics, industrial tools and components, biotechnology, and medicine. Wide band-gap materials are considered, ranging from molecular clusters, nanophase materials, growth, processing and synthesis. The processing of composite based materials can be classified into six basic methods: in situ growth, high pressure/high temperature catalytic conversion; mix and sinter (c-BN plus metal-ceramic polymer mix); direct sintering; direct polymorphic conversion; shock detonation; and SHS sintering.
Download or read book Azoles written by Aleksey Kuznetsov and published by BoD – Books on Demand. This book was released on 2021-06-30 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Azoles are a broad and promising class of five-membered heterocyclic compounds containing from one up to five nitrogen atom(s) that can also contain sulfur or oxygen atoms. Widely used as potent antifungal agents, various azole derivatives have also demonstrated many other promising biological properties. This book covers studies of several types of thiazole-based heterocyclic scaffolds, the development of 4-thiazolidinone and thiazole derivatives with heterocyclic fragments as potential candidates for new drugs against trypanosomiasis, numerous synthetic approaches for the synthesis of 1,2,3-triazoles, the application of N-azole, N,S-azole, and N,O-azole as well as their derivatives as retarders of metallic corrosion, and the integration of azoles in materials used for renewable energy processing and applications and wood treatment.
Download or read book Polymeric Drug Delivery Systems written by Glen S. Kwon and published by CRC Press. This book was released on 2005-04-12 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt: Emphasizing four major classes of polymers for drug delivery-water-soluble polymers, hydrogels, biodegradable polymers, and polymer assemblies-this reference surveys efforts to adapt, modify, and tailor polymers for challenging molecules such as poorly water-soluble compounds, peptides/proteins, and plasmid DNA.
Download or read book NeOn Methodology for Building Ontology Networks written by Mari Carmen Suárez-Figueroa and published by Ios PressInc. This book was released on 2012 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new ontology development paradigm has started its emphasis lies on the reuse and possible subsequent reengineering of knowledge resources, on the collaborative and argumentative ontology development, and on the building of ontology networks this new trend is the opposite of building new ontologies from scratch. To help ontology developers in this new paradigm, it is important to provide strong methodological support.However, up to date, there are no methodological approaches that help ontology developers to build large ontologies embedded in ontology networks in complex settings where distributed teams could
Download or read book Athenian Red Figure Vases written by John Boardman and published by . This book was released on 1975 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
