Florian Gebhard

Newton’sche Axiome? Reynolds-Zahl? Carnot-Prozess? Operationsverstärker? Diese Formelsammlung führt klar und anschaulich durch den Mikrokosmos der physikalischen Formeln und ihrer Anwendungen in Technik und Naturwissenschaften. Von der klassischen Bewegungslehre bis zur modernen Atomphysik und Spektroskopie finden sich immer hilfreiche Basis- und Hintergrundinformationen, wenn Studium, Prüfungen und Beruf schnelle und sichere Antworten fordern. Die physikalischen Grundlagen werden auf Situationen des Alltags und die Innovationen des 21. Jahrhunderts angewandt. Die korrigierte neue Auflage enthält zahlreiche Aktualisierungen und Detailverbesserungen, u. a. die normgemäßen Schaltelemente in der Elektrotechnik.

Little do we reliably know about the Mott transition, and we are far from a complete understanding of the metal --insulator transition due to electr- electron interactions. Mott summarized his basic ideas on the subject in his wonderful book Metal--Insulator nansitions that first appeared in 1974 11. 1). In his view, a Motk insulator displays a gap for charge-carrying excitations due to electron cowelations, whose importance is expressed by the presence of local magnetic moments regardless of whether or not they are ordered. Since the subject is far from being settled, different opinions on specific aspects of the Mott transition still persist. This book naturally embodies my own understanding of the phenomenon, inspired by the work of the late Sir Kevill Mott. The purpose of this book is twofold: first, to give a detailed presen- tion of the basic theoretical concopts for Mott insulators and, second, to test these ideas against the results from model calculations. For this purpose the Hubbard model and some of its derivatives are best suited. The Hubbard model describes a Mott transition with a mere minimum of tunable par- eters, and various exact statements and even exact solutions exist in certain limiting cases. Exact solutions not only allow us to test our basic ideas, but also help to assess the quality of approxin~ate theories for correlated electron systems.

Little do we reliably know about the Mott transition, and we are far from a complete understanding of the metal --insulator transition due to electr- electron interactions. Mott summarized his basic ideas on the subject in his wonderful book Metal--Insulator nansitions that first appeared in 1974 11. 1). In his view, a Motk insulator displays a gap for charge-carrying excitations due to electron cowelations, whose importance is expressed by the presence of local magnetic moments regardless of whether or not they are ordered. Since the subject is far from being settled, different opinions on specific aspects of the Mott transition still persist. This book naturally embodies my own understanding of the phenomenon, inspired by the work of the late Sir Kevill Mott. The purpose of this book is twofold: first, to give a detailed presen- tion of the basic theoretical concopts for Mott insulators and, second, to test these ideas against the results from model calculations. For this purpose the Hubbard model and some of its derivatives are best suited. The Hubbard model describes a Mott transition with a mere minimum of tunable par- eters, and various exact statements and even exact solutions exist in certain limiting cases. Exact solutions not only allow us to test our basic ideas, but also help to assess the quality of approxin~ate theories for correlated electron systems.

Der Behandlungserfolg nach Unfällen hängt entscheidend von der Qualität der präklinischen und klinischen Erstversorgung ab. Knapp und prägnant hebt das für die Kitteltasche des klinischen Assistenten, Notarztes und Rettungsassistenten konzipierte Trauma-Taschenbuch die in dieser Phase wichtigen Schritte hervor; es führt gezielt durch den Katalog diagnostischer Maßnahmen und leitet klar und präzise das therapeutische Management ab. Kernelement dieses Taschenbuchs ist die didaktische Aufbereitung, die auch in der Akutsituation eine schnelle Orientierung zuläßt.