Atti del Workshop IGF - Rolling contact fatigue: applications and developments
Electrical Contacts
Covering the theory, application, and testing of contact materials, Electrical Contacts: Principles and Applications, Second Edition introduces a thorough discussion on making electric contact and contact interface conduction; presents a general outline of, and measurement techniques for, important corrosion mechanisms; considers the results of contact wear when plug-in connections are made and broken; investigates the effect of thin noble metal plating on electronic connections; and relates crucial considerations for making high- and low-power contact joints. It examines contact use in switching devices, including the interruption of AC and DC circuits with currents in the range 10mA to 100kA and circuits up to 1000V, and describes arc formation between open contacts and between opening contacts. Arcing effects on contacts such as erosion, welding, and contamination are also addressed. Containing nearly 3,000 references, tables, equations, figures, drawings, and photographs, the book provides practical examples encompassing everything from electronic circuits to high power circuits, or microamperes to mega amperes. The new edition: Reflects the latest advances in electrical contact science and technology Examines current research on contact corrosion, materials, and switching Includes updates and revisions in each chapter, as well as up-to-date references and new figures and examples throughout Delivers three new chapters on the effects of dust contamination, electronic sensing for switching systems, and contact phenomena for micro-electronic systems (MEMS) applications With contributions from recognized experts in the field, Electrical Contacts: Principles and Applications, Second Edition assists practicing scientists and engineers in the prevention of costly system failures, as well as offers a comprehensive introduction to the subject for technology graduate students, by expanding their knowledge of electrical contact phenomena.
Electric Contacts
This book is a completely revised and rewritten edition of "Electric Contacts Handbook" published in 1958. A large number of new in vestigations are considered, and many of the basic theories are revised in detail and even in general. The body of information had to be limited as it was not advisable to increase the volume of the book. In particular, no attempt was made to cover all of the practical applications. They appear as examples following concentrated explanations of basic phenomena. As in several branches of technology, the solutions of problems ari sing in the field of electric contacts involve insight into various disci plines of physics. It is feit that reviews of some of those topics, especi ally adapted to electric contact phenomena, are welcome to many readers. For example, chapters have been devoted to the structure of carbon, the band theory of electric conduction in solids, certain pro blems in statistics, and the theory of the electric arc. As regards arc problems, new ideas have been introduced. In order to make the main text less cumbersome, such reviews are presented as appendices. Throughout this edition, the mksa-unit system is used in accord with the latest recommendation for standardization of units in scientific and technical writings. The chapter "History of Early Investigations on Contacts" forming Part IV in the preceding edition of 1958 has not been repeated in this book.
Uzbekistan Export-Import and Business Directory Volume 1 Strategic Information and Contacts
2011 Updated Reprint. Updated Annually. Uzbekistan Export-Import Trade and Business Directory
Language Contacts at the Crossroads of Disciplines
This volume offers a cross-disciplinary insight into language contact research, bringing together fresh empirical and theoretical studies from various fields concerning different dimensions of language contact and variation, second language acquisition and translation. In the present-day world of globalization, population mobility and information technology, the themes of multilingualism and contact-induced language change are as topical as ever, and research on language contacts and cross-linguistic influence has expanded rapidly during the last few decades. Along with the increasing specialization of related disciplines, their research perspectives, methods and terminology have become dispersed, although language contact phenomena themselves can rarely be confined within the scope of a single discipline. This collection of articles creates dialogue between researchers from different scientific backgrounds, thus viewing language contact phenomena from a broader perspective. When language contact is re-defined to include the mental or cognitive level of contact between different languages and varieties in the minds of language learners or translators, salient links are created between the different disciplines dealing with this subject matter.
