Semiconductor power devices are the heart of power electronics. They determine the performance of power converters and allow topologies with high efficiency. Semiconductor properties, pn-junctions and the physical phenomena for understanding power devices are discussed in depth. Working principles of state-of-the-art power diodes, thyristors, MOSFETs and IGBTs are explained in detail, as well as key aspects of semiconductor device production technology. In practice, not only the semiconductor, but also the thermal and mechanical properties of packaging and interconnection technologies are essential to predict device behavior in circuits. Wear and aging mechanisms are identified and reliability analyses principles are developed. Unique information on destructive mechanisms, including typical failure pictures, allows assessment of the ruggedness of power devices. Also parasitic effects, such as device induced electromagnetic interference problems, are addressed. The book concludes with modern power electronic system integration techniques and trends.
Seven decades after his death, German Jewish writer, philosopher, and literary critic Walter Benjamin (1892–1940) continues to fascinate and influence. Here Uwe Steiner offers a comprehensive and sophisticated introduction to the oeuvre of this intriguing theorist. Acknowledged only by a small circle of intellectuals during his lifetime, Benjamin is now a major figure whose work is essential to an understanding of modernity. Steiner traces the development of Benjamin’s thought chronologically through his writings on philosophy, literature, history, politics, the media, art, photography, cinema, technology, and theology. Walter Benjamin reveals the essential coherence of its subject’s thinking while also analyzing the controversial or puzzling facets of Benjamin’s work. That coherence, Steiner contends, can best be appreciated by placing Benjamin in his proper context as a member of the German philosophical tradition and a participant in contemporary intellectual debates. As Benjamin’s writing attracts more and more readers in the English-speaking world, Walter Benjamin will be a valuable guide to this fascinating body of work.
Advances in Spinal Fusion reveals a new generation of materials and devices for enhanced operations in spinal fusion. This reference showcases emerging research and technologies in areas such as biodegradable implants, drug delivery, stem cell isolation and transfection, cell encapsulation and immobilization, and the design of 2D and 3D scaffolds for cells. It captures a cascade of innovations crucial to increased healing and decreased morbidity in spinal fusion methods and mechanics and addresses current standards in analytical methodology and quality control, it describes the selection of biomaterials for improved biocompatibility, biostability, and structure/function relationships.
The goal of this book is to create awareness for a change in mind-set that we will all have to face and go through. The necessity for this new mind set is being driven by the situation that a completely new business world, a new reality, is being created at the point where the phenomenon commonly referred to as the "new economy" converges with the well-known old economy. During the very late 1990s, this new reality was being driven by an almost incredible increase in yields in the financial markets, where conventional but value-driven and stable stocks such as Philip Morris, General Electric, or Bayer, did not attract as many investors as before - if we can call some of them investors at all. Companies in the high-tech or the new market segments are all part of the new economy. This new economy has created new business ideas, business models, and a new reality, in which chief executive officers (CEOs) were in the mid twenties and had basically no clue as to what real business is and how much a dollar counts. Now, as this convergence is happening, the painful reality and the business rules of the old economy get us back down to earth. The CEOs become more senior, business plans are validated more carefully, and just having the famous ". com" in your company name does not get you any further or lead you to any of required money.
Halbleiter-Leistungsbauelemente sind das Kernstück der Leistungselektronik. Sie bestimmen die Leistungsfähigkeit und machen neuartige und verlustarme Schaltungen erst möglich. In dem Band wird neben den Halbleiter-Leistungsbauelementen selbst auch die Aufbau- und Verbindungstechnik behandelt: von den physikalischen Grundlagen und der Herstellungstechnologie über einzelne Bauelemente bis zu thermomechanischen Problemen, Zerstörungsmechanismen und Störungseffekten. Die 2., überarbeitete Auflage berücksichtigt technische Neuerungen und Entwicklungen.
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