Bøker av Cheng Zhang

This book highlights the latest progress in pulsed discharge plasmas presented by front-line researchers worldwide. The science and technology surrounding pulsed discharge plasmas is advanced through a wide scope of interdisciplinary studies into pulsed power and plasma physics. Pulsed discharge plasmas with high-power density, high E/N and high-energy electrons can effectively generate highly reactive plasma. Related applications have gathered strong interests in various fields. With contributions from global scientists, the book elaborates on the theories, numerical simulations, diagnostic methods, discharge characteristics and application technologies of pulsed discharge plasmas. The book is divided into three parts with a total of 35 chapters, including 11 chapters on pulsed discharge generation and mechanism, 12 chapters on pulsed discharge characterization and 12 chapters on pulsed discharge applications (wastewater treatments, biomedicine, surface modification, and energy conversion, etc). The book is a must-have reference for researchers and engineers in related fields and graduate students interested in the subject.

This book recounts the elections in 2012 from different perspectives, one from an ordinary voter, one from an election researcher and one from a redistricting insider. Many officials, representatives and senators are elected from their districts. "One person one vote principle" dictates that the election districts should be redrawn every ten years after the census. During the redistricting, in order to win an upper hand over the opponents, partisan gerrymandering is quite popular with packing and cracking tricks. Whoever wins in redistricting wins the elections for the next ten years. In many cases, the election outcomes are decided before the election starts. Redistricting transforms the ideal of "people electing their representatives" to the reality of "representatives choosing their constituents".