springer okt 1981 (4 Ergebnisse)

Taschenbuch. Zustand: Neu. Neuware - The mathematical models in this book are concerned with a variety of approaches to the manner in which the clinical radiologic treatment of human neoplasms can be improved. These improvements comprise ways of delivering radiation to the malignan cies so as to create considerable damage to tumor cells while sparing neighboring normal tissues. There is no unique way of dealing with these improvements. Accord ingly, in this book a number of different presentations are given. Each presentation has as its goal some aspect of the improvement, or optimization, of radiotherapy. This book is a collection of current ideas concerned with the optimization of human cancer radiotherapy. It is hoped that readers will build on this collection and develop superior approaches for the understanding of the ways to improve therapy. The author owes a special debt of thanks to Kathy Prindle who breezed through the typing of this book with considerable dexterity. TABLE OF CONTENTS Chapter GENERAL INTRODUCTION 1. 1 Introduction 1 1. 2 History of Cancer and its Treatment by Radiotherapy 8 1. 3 Some Mathematical Models of Tumor Growth 12 1. 4 Spatial Distribution of the Radiation Dose 20 Chapter 2 SURVIVAL CURVES FROM STATISTICAL MODELS 24 2. 1 Introduction 24 2. 2 The Target Model 26 2. 3 Single-hit-to-kill Model 27 2. 4 Multitarget, Single-hit Survival 29 2. 5 Multitarget, Multihit Survival 31 2. 6 Single-target, Multihit Survival 31 2.

Buch. Zustand: Neu. Neuware - Understanding Husserl's Transcendental Phenomenology: An Introductory Essay.- The Problem Of The Phenomenology Of Edmund Husserl.- Operative Concepts in Husserl's Phenomenology.- A Transcendental-Phenomenological Investigation concerning Universal Idealism, Intentional Analysis and the Genesis of Habitus: Arch , Phansis, Hexis, Logos.- Reflections on the Foundation of the Relation between the A Priori and the Eidos in the Phenomenology of Husserl.- Regions of Being and Regional Ontologies in Husserl's Phenomenology.- The Problem Posed by the Transcendental Science of the A Priori of the Life-World.- Notes on the First Part Of Experience and Judgment by Husserl.- A Letter from Ludwig Landgrebe to Jean Wahl.- A Note on Some Empiricist Aspects of the Thought of Husserl.- The Specific Character of the Social According to Husserl.- Notes on the Authors.- Notes on the Translator| Editors and Contributor.

Buch. Zustand: Neu. Neuware - Our knowledge of the functional characteristics of the plants of mediterranean-cl imate regions has increased greatly in the past decade. In recent times the possibility of large-scale util ization of biomass for energy from these regions has been proposed. In order to assess the feasibil ity of these proposals we must consider the productive structure of these plant communities and how they vary through time and space. This symposium was an attempt to examine our recently acquired basic knowledge of the environmental I imitations on the productivity of Mediterranean plant communities in relation to the consequences of the possible util ization of these communities for energy and chemicals. Specifically in this book we examine the mechanisms by which plants of mediterranean-cl imate regions maintain their productive capacity under the prevail ing conditions of summer draught and winter cold. We consider the characteristics of leaves, their history, morphology and plasticity. Evergreen sclerophyll leaves are common to the dominant plants of all mediterranean-cl imate regions and thus they have significance in terms of enhancing carbon gain and water-use efficiency as well as ensuring survival under the prevail ing cl imatic conditions.

Buch. Zustand: Neu. Neuware - The present volume is a sequel to Deontic Logic: Introductory and Systematic Readings (D. Reidel Publishing Company, Dordrecht 1971): its purpose is to offer a view of some of the main directions of research in contemporary deontic logic. Most of the articles included in Introductory and Systematic Readings represent what may be called the standard modal approach to deontic logic, in which de on tic logic is treated as a branch of modal logic, and the normative concepts of obligation, permission and prohibition are regarded as analogous to the 'alethic' modalities necessity, possibility and impossibility. As Simo Knuuttila shows in his contribution to the present volume, this approach goes back to late medieval philosophy. Several 14th century philosophers observed the analogies between deontic and alethic modalities and discussed the deontic interpretations of various laws of modal logic. In contemporary deontic logic the modal approach was revived by G. H. von Wright's classic paper 'Deontic Logic' (1951). Certain analogies between deontic and alethic modalities are obvious and uncontroversial, but the standard approach has often been criticized on the ground that it exaggerates the analogies and tends to ignore those features of normative concepts which distinguish them from other modalities.