I am not sure about the meaning of a preface neither about its convenience or needlessness nor about the addressees However I suppose that it is expected to tell a part of the story behind the story and that it is read by at least two types of readers The rst group consists of friends colleagues and all others who have contributed to the opus in any way Presumably most of them like being named in the preface and I think they deserve this attention becausetheyhaveaccompaniedtheroadtotheopusandare thus partofthe whole Thesecondgroupcomprisesthoseacademicfellowswhoareinthesame boot as I am in terms of preparing or having even nished their doctoral or habilitation thesis All others be it that they generally like reading prefaces or expect hints with regard to the reading of this book are likewise welcome to reading this preface This book contains most parts of my habilitation thesis which was cepted by the Faculty of Business and Economics of the RWTH Aachen U versity Germany Unfortunately to avoid possible copyright violation I had to omit some paragraphs of the proposed infrastructure framework presented in Chapt 6 If you are interested in the full version of this speci c chapter please contact me schryen gmx net and I will be happy to provide you an electronic copy Usually a thesis represents a loosely coupled collection of published papers cumulative thesis or a classic monograph This book examines anti spam measures in terms of their potentials limitations advantages and drawbacks These factors determine to which extent the measures can contribute to the reduction of spam in the long run It examines legislative organizational behavioral and technological anti spam measures including an insight into their effectiveness In addition it presents the conceptual development and analysis of an infrastructural e mail framework which features such a complementary application and considers deployment issues
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