This new edition covers a wide area from transients in power systems—including the basic theory, analytical calculations, EMTP simulations, computations by numerical electromagnetic analysis methods, and field test results—to electromagnetic disturbances in the field on EMC and control engineering. Not only does it show how a transient on a single-phase line can be explained from a physical viewpoint, but it then explains how it can be solved analytically by an electric circuit theory. Approximate formulas, which can be calculated by a pocket calculator, are presented so that a transient can be analytically evaluated by a simple hand calculation. Since a real power line is three-phase, this book includes a theory that deals with a multi-phase line for practical application. In addition, methods for tackling a real transient in a power system are introduced. This new edition contains three completely revised and updated chapters, as well as two new chapters on grounding and numerical methods.
Presents current research into electromagnetic computation theories with particular emphasis on Finite-Difference Time-Domain Method This book is the first to consolidate current research and to examine the theories of electromagnetic computation methods in relation to lightning surge protection. The authors introduce and compare existing electromagnetic computation methods such as the method of moments (MOM), the partial element equivalent circuit (PEEC), the finite element method (FEM), the transmission-line modeling (TLM) method, and the finite-difference time-domain (FDTD) method. The application of FDTD method to lightning protection studies is a topic that has matured through many practical applications in the past decade, and the authors explain the derivation of Maxwell’s equations required by the FDTD, and modeling of various electrical components needed in computing lightning electromagnetic fields and surges with the FDTD method. The book describes the application of FDTD method to current and emerging problems of lightning surge protection of continuously more complex installations, particularly in critical infrastructures of energy and information, such as overhead power lines, air-insulated sub-stations, wind turbine generator towers and telecommunication towers. Both authors are internationally recognized experts in the area of lightning study and this is the first book to present current research in lightning surge protection Examines in detail why lightning surges occur and what can be done to protect against them Includes theories of electromagnetic computation methods and many examples of their application Accompanied by a sample printed program based on the finite-difference time-domain (FDTD) method written in C++ program
This new edition covers a wide area from transients in power systems—including the basic theory, analytical calculations, EMTP simulations, computations by numerical electromagnetic analysis methods, and field test results—to electromagnetic disturbances in the field on EMC and control engineering. Not only does it show how a transient on a single-phase line can be explained from a physical viewpoint, but it then explains how it can be solved analytically by an electric circuit theory. Approximate formulas, which can be calculated by a pocket calculator, are presented so that a transient can be analytically evaluated by a simple hand calculation. Since a real power line is three-phase, this book includes a theory that deals with a multi-phase line for practical application. In addition, methods for tackling a real transient in a power system are introduced. This new edition contains three completely revised and updated chapters, as well as two new chapters on grounding and numerical methods.
The central theme of this book is national land and infrastructure design in the age of the declining population and the recovery from the Great East Japan Earthquake in the affected regions in Japan. Based on the theory of spatial economics and evidence from Japanese history, the authors show that the growing economy with a population increase develops into a multi-cored and complex structure. In the population decline phase, however, such construction will be destabilized because of agglomeration economies in the central core. Then, a catastrophic shock that strikes may provoke the decline of the lower-rank-size provincial cities and their eventual disappearance if they compete only in lower prices of staple products. Not only is the practice bad for the residents; it also leads to lower national welfare resulting from the loss of diversity and overcrowded big cities. The authors argue that small local towns can recover and will be sustained if they will endeavor in innovative production by making good use of local natural resources and social capital. Under the ongoing declining population in Japan, an undesirable concentration in Tokyo will proceed further with increasing social cost and risk. The recent novel coronavirus pandemic has highlighted that concern.
The fact that Snow did not sneak into “red China” to gather information constituting the basis of his Red Start over China all alone is in many instances misunderstood even by scholars. Mao Zedong’s biography has been the subject of an international mountain of commentary in China and elsewhere. Biographies praising Mao and those slandering him are all based on the American journalist Edgar Snow’s (1905–1972) account in Red Star over China for the route Mao traveled from early childhood through his youth. How the “Red Star” Rose introduces the image of Mao and the biographical information made known to the world through the publication of Red Star, and with its publication the circumstances which they fundamentally undermined. Ishikawa Yoshihiro uses Mao Zedong as raw material to examine from whence and how ordinary historical information and images which we habitually use unconsciously come into being. He desires to help readers to reconsider the historicity of the generation of not only Mao’s image but of that of “historical materials.” -------------- With a title that evokes Gao Hua’s seminal study of Mao Zedong’s rise in the Chinese Communist Party, Ishikawa Yoshihiro asks two critical questions—What did the world know of Mao before the publication of Edgar Snow’s Red Star over China? How did Red Star change that understanding? With the meticulous research, careful documentation, and fair-minded judgment that characterizes all of Ishikawa’s work, he shows how little even Moscow and the Communist International knew about Mao before 1936. This study is full of unexpected insights into the origins of early visual images of Mao, the background to Snow’s historic trip to northern Shaanxi, and the evolution of the classic study that he left. In a world where balanced judgment of the rise of Mao is increasingly difficult to find, Ishikawa’s scholarship stands out as a rare model of judicious balance. —Joseph W. Esherick, Emeritus Professor, Hwei-chih and Julia Hsiu Chair in Chinese Studies, University of California, San Diego This book is, first, an exquisite excavation on the enabling infrastructures in the writing and publishing of one of the most iconic works in journalistic interviews in the 20th century, a text that broke through a wall of intelligence blockade to give to the world, in an autobiographical voice and with a striking image, the debut of the revolutionary Mao while holed up in a mountain base area. It is, in addition, a history of the reading of the book in multiple languages including Chinese that is indexed to the rise of the Mao cult thereafter. Ishikawa captures a moment of a past gearing up in anticipation of a future that never came. This book is a must-read for all with an interest in Mao, journalism, and the history of books. —Wen-hsin Yeh, Richard H. and Laurie C. Morrison Chair Professor in History, University of California, Berkeley Ishikawa offers a challenging reflection on how historical information and images that we take for granted come into being through the twin case studies of images of Mao Zedong before Edgar Snow’s famous biography in 1936 and then how Snow’s images of Mao were translated, and transmuted, into Chinese, Russian and Japanese. Joshua Fogel’s careful translation brings this impeccable example of Japanese sinology to the English reading public. —Timothy Cheek, Professor and Louis Cha Chair in Chinese Research, University of British Columbia
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