This book has therefore been written for those who want an introductory account of the subject that is qualitative, informative, and is not overburdened with mathematics and circuit analyses. Although it is assumed that the reader has no previous knowledge of electronics, some acquaintance with certain aspects of physics and mathematics must be taken for granted. The reader is expected to have heard of Ohm's law, to be able to manipulate algebraic expressions, to perform very simple differentiations and to know what is meant by a simple integral. The mathematical content has, however, been restricted, but where necessary sufficient instruction is given. (The only exception to this is the section dealing with operational amplifiers.) Partic- ular attention has been paid to the sections dealing with the j-operator and complex numbers in a.c. theory, both of which are extremely easy to under- stand.

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.

The Third International Electronic Circuit Packaging Symposium was unique in a number of ways, particularly in its scope and in the approach taken in some of the presentations. For instance, one of the particularly interesting papers was "Design- ing and Packaging Electronic Modular Enclosures That Never Leave the Ground." Here we were shown how a large system console could be packaged to meet the "convenience" needs of the operator. Thus, personnel considerations became impor- tant in the package and one of the determining factors in the design.

"A real jewel of an elementary introduction into the main concepts of nuclear theory . . . should be in the hands of every student."  Nuclear Physics.
This highly regarded volume, based on a series of lectures given by Landau to experimental physicists in Moscow in 1954, offers concise, lucid discussions of a number of the most important underlying concepts of nuclear physics. The authors, both noted Russian physicists, limit their conclusions concerning nuclear structure to those based on experimental data, using only general quantum-mechanical relations.

Launch, grow, and scale your courier business with expert strategies, tools, and client-getting systems.

Learn AWS Infrastructure as Code with Terraform and automate deployments using GitHub Actions CI/CD pipelines

Nel cielo sopra la campagna dell'Essex, nell'Inghilterra orientale, oltre i rami di querce e olmi, in alcune stagioni dell'anno si possono osservare dei puntini scendere come frecce dalle nubi per poi risalire, disegnare eleganti cerchi, scomparire e riapparire: sono i falchi pellegrini, gli uccelli più magnifici della zona. A inizio anni sessanta, se si fosse abbassato lo sguardo, si sarebbe però potuto notare un'altra sagoma altrettanto riconoscibile: quella di un uomo sulla trentina - capelli biondi, occhiali dalle lenti spesse - che, steso a terra o in piedi, con un paio di binocoli al collo prendeva appunti furiosamente.