Springer springer vieweg feb 2002 (4 risultati)

Taschenbuch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -The subject of this book is Osserman semi-Riemannian manifolds, and in particular, the Osserman conjecture in semi-Riemannian geometry. The treatment is pitched at the intermediate graduate level and requires some intermediate knowledge of differential geometry. The notation is mostly coordinate-free and the terminology is that of modern differential geometry. Known results toward the complete proof of Riemannian Osserman conjecture are given and the Osserman conjecture in Lorentzian geometry is proved completely. Counterexamples to the Osserman conjuncture in generic semi-Riemannian signature are provided and properties of semi-Riemannian Osserman manifolds are investigated.Springer-Verlag KG, Sachsenplatz 4-6, 1201 Wien 184 pp. Englisch.…

Taschenbuch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -The history of biology is replete with examples of how comparative biology helped clarify the meaning of structure and function in complex animals. Indeed, without the comparative approach to biology, the birth of physiology would have been delayed. Fishman (1979) Comparative morphologists are challenged to discern the changes that have occurred in evolution and development of the forms and states of organisms as well as to explain the factors that compelled them (e.g. Dullemeijer 1974). The main objective of this contribution is to present what I deem to be some of the fundamental structural aspects in the design of respiratory or gans while debating and speculating on when, how and why these states were founded. My main thesis is that the modern gas exchangers are products of protracted processes that have en tailed adaptation to specific environments and lifestyles. Only those feasible designs that have proven adequately competent in meeting demands for molecular oxygen have been preserved. Unfortunately, August Krogh's (Krogh 1941) and Pierre Dejours' (Dejours 1975) seminal works on the comparative physiology of the respiratory organs have not been paralleled by equally exten sive and detailed morphological work. Our approach has been to look into the limiting functional properties as regards the respi ratory capacities of gas exchangers while finding out the specific structural adaptations that have evolved to meet the metabolic needs or to look into form and to discern how it limits function. This has allowed a deduction of structure-function correlation.Springer-Verlag KG, Sachsenplatz 4-6, 1201 Wien 128 pp. Englisch.…

Buch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -We dedicate this book to students 0/ computer science who want to under stand why the radio channel is at the heart of mobile communications, be it data or voice, and to students 0/ communications engineering looking for an introduction to the structure of the Internet protocols, and their application to mobile radio. We also welcome the practicing engineer' working for mobile network operators and infrastructure suppliers, and the application program mer looking for the underlying reasons for the problems they encounter in their daily work. Given that convergence of the information technology and communica tions worlds has been talked about for almost 20 years, there is still surpris ingly little knowledge among specialists of each others' fields. Data communi cations over radio, notably Internet access, however, requires fuH understand ing of both fields. Internet protocols have been designed for fixed networks. There bit errors are so rare that interrupted transmission almost inevitably means congestion. In contrast, the radio channel constitutes a bottleneck for mobile data communications in that it introduces bit errors even at modest data rates. This book is based on the doctoral thesis of one of us (M. Taferner).Springer-Verlag KG, Sachsenplatz 4-6, 1201 Wien 284 pp. Englisch.…

Buch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -Die interdisziplinär besetzte Projektgruppe Biodiversität der Europäischen Akademie Bad Neuenahr-Ahrweiler hat sich die Aufgabe gestellt, den wissenschaftlichen Sachstand aus den verschiedenen Disziplinen zusammenzutragen und die diversen, auf der Grundlage fachspezifischer Methoden entwickelten Konzepte gemeinsam zu untersuchen.In den in diesem Band versammelten Ergebnissen finden sich entsprechend neben den rein naturwissenschaftlichen auch relevante erkenntnis- und wissenschaftstheoretische Fragen sowie juristische und ökonomische Aspekte diskutiert. Damit bietet das Buch einen guten Überblick über den Diskussionsstand und eine solide Grundlage für die weitere wissenschaftliche Diskussion.Springer-Verlag KG, Sachsenplatz 4-6, 1201 Wien 484 pp. Deutsch.…