Mat Riaux Et Techniques

L’atome de carbone a un rôle clé. Il peut former plusieurs types de liaisons chimiques mais également s’auto-associer pour donner un squelette carboné, caractéristiques qui sont à la base de la chimie organique, de la biochimie et de la vie. Science et technique des carbones présente la progression des connaissances dans les solides carbonés à partir des découvertes et inventions successives depuis la préhistoire. Le rôle essentiel joué par l’exploitation des mines de charbon au moment de la première révolution industrielle comme source d’énergie primaire est un point crucial. L’importance du carbone s’est accrue par le développement de la carbochimie pour créer des matériaux artificiels. Leurs utilisations comme matériaux traditionnels de transformation en sidérurgie et comme céramiques particulières, puis technologiques (charbons actifs, fibres de carbone…), sont successivement décrites. La découverte récente des carbones moléculaires, fleurons de la nanotechnologie, met en exergue l’avènement de la technoscience. Finalement, leur impact économique et sociétal est analysé en exposant l’existence de grandes transitions énergétiques associées aux cycles macro-économiques.

This title is designed to provide a clear and comprehensive overview of tribology. The book introduces the notion of a surface in tribology where a solid surface is described from topographical, structural, mechanical, and energetic perspectives. It also describes the principal techniques used to characterize and analyze surfaces. The title then discusses what may be called the fundamentals of tribology by introducing and describing the concepts of adhesion, friction, wear, and lubrication. The book focuses on the materials used in tribology, introducing the major classes of materials used, either in their bulk states or as coatings, including both protective layers and other coatings used for decorative purposes. Of especial importance to the tribology community are sections that provide the latest information on Nanotribology, Wear, Lubrication, and Wear-Corrosion: Tribocorrosion and Erosion-Corrosion.

With a collection of 57 articles in English, French and German, presenting the most recent research on ancient fortifications, this book is the most substantial publication ever to have issued on the topic for many years. While fortifications of the ancient cultures of the middle east and ancient Greek and Roman worlds were noticed by travelers and scholars from the very beginning of research on antiquity from the late 18th century onwards, the architectural, economic, logistical, political, urban and other social aspects of fortifications have been somewhat overlooked and underestimated by scholarship in the 20th century. The book presents the research of a new generation of scholars who have been analyzing those aspects of fortifications, many of them with years of experience in fieldwork on city walls. Much new evidence and a fresh look at this important category of built structure is now made available, and the publication will be of interest not only to the field of ancient architecture, but also to other sub-disciplines of archaeology and ancient history. The papers were presented at a conference in Athens in December 2012, and they all present material and discuss topics under seven headings that represent the most central themes in the study of fortification in antiquity: the origins of fortification, physical surroundings and building technique, function and semantics, historical context, the fortification of regions and regionally confined phenomena, the fortifications of Athens and new field research. The book is Volume 2 in the new series Fokus Fortifikation Studies, created by the German based international research network Fokus Fortifikation. The topics included have been identified by the network over many previous conferences and workshops as being the most important and as needing research and discussion beyond the network members. Volume 1 in the series, Ancient Fortifications: a compendium of theory and practice (Oxbow Books) will also appear in 2015 and together the two volumes bring the field of fortification studies up-to-date and will be an essential resource for many years to come.

Cet ouvrage propose un panorama détaillé des micro et nanosystèmes autonomes en énergie, couvrant à la fois les principes mis en oeuvre et les derniers développements. Une étude approfondie d'applications dans les domaines aéronautiques, médicaux et du contrôle des bâtiments permet de dresser les grandes spécifications de tels systèmes et de leurs sous-composants. Les techniques les plus récentes de récupération et conversion d'énergie d'origine photovoltaïque, thermique et mécanique sont présentées. Un état de l'art sur les interfaces capteurs, le traitement du signal numérique et les liaisons radiofréquence, ultra-basse consommation, complète ce panorama. Enfin, des techniques d'optimisation de l'énergie au niveau du microsystème/noeud de capteur et d'un réseau de capteurs sont introduites et discutées.

This book is the third in the series of volumes which provide the papers of the conferences held at Queens' College, Cambridge by the Construction History Society. Papers cover different aspects of the history of construction, including studies of different building materials, building firms, the development and education of building professionals, the construction of buildings and infrastructure, methods and techniques of construction, and other subjects related to the history and development of buildings.

The French-English volume of this highly acclaimed set consists of some 100,000 keywords in both French and English, drawn from the whole range of modern applied science and technical terminology. Covers over 70 subject areas, from engineering and chemistry to packaging, transportation, data processing and much more.

The French-English volume of this highly acclaimed set consists of some 100,000 keywords in both French and English, drawn from the whole range of modern applied science and technical terminology. Covers over 70 subject areas, from engineering and chemistry to packaging, transportation, data processing and much more.