004 Datenverarbeitung; Informatik
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Viele Probleme in der Aussagenlogik sind nur sehr aufwändig lösbar. Ist beispielsweise eine Wissensbasis gegeben, an die wir Anfragen stellen, wollen, so kann dies mitunter sehr mühsam sein. Um trotzdem effizient Anfragen beantworten zu können, hat sich die Vorgehensweise der Wissenskompilation entwickelt. Dabei wird die Lösung der Aufgabe in eine Offline- und eine Online-Phase aufgeteilt. In der Offline-Phase wird die Wissensbasis präkompiliert. Dabei wird sie in eine bestimmte Form umgewandelt, auf der sich die erwarteten Anfragen effizient beantworten lassen. Diese Transformation der Wissensbasis ist meist sehr aufwändig, muss jedoch nur einmalig durchgeführt werden. In der darauffolgenden Online-Phase können nun effizient Anfragen beantwortet werden. In dieser Diplomarbeit wird eine spezielle Normalform, die sich als Zielsprache der Präkompilation anbietet, untersucht. Außerdem wird die Präkompilation so in einzelne Schritte unterteilt, dass möglicherweise bereits nach einigen Teilschritten Anfragen beantwortet werden können.
This document presents a concept of a "web usage mining system". The main purpose of this work is to cover situations, in which high traffic will cause traditional approaches to collapse. Therefore, it presents several measuring methods and acquisition techniques, and provides strategies that allow pertinent storage and querying complexity even in high traffic domains.
In the last years the e-government concentrated on the administrative aspects of administrative modernisation. In the next step the e-discourses will gain in importance as an instrument of the public-friendliness and means of the e-democracy/e-participation. With growing acceptance of such e-discourses, these will fastly reach a complexity, which could not be mastered no more by the participants. Many impressions, which could be won from presence discussions, will be lacking now. Therefore the exposed thesis has the objective of the conception and the prototypical implementation of an instrument (discourse meter), by which the participants, in particular the moderators of the e-discourse, are capable to overlook the e-discourse at any time and by means of it, attain their discourse awareness. Discourse awareness of the present informs about the current action in the e-discourse and discourse awareness of the past about the past action, by which any trends become visible. The focus of the discourse awareness is located in the quantitative view of the action in the e-discourse. From the model of e-discourse, which is developed in this thesis, the questions of discourse awareness are resulting, whose concretion is the basis for the implementation of the discourse meter. The discourse sensors attached to the model of the e-discourse are recording the actions of the e-discourse, showing events of discourse, which are represented by the discourse meter in various forms of visualizations. The concept of discourse meter offers the possibility of discourse awareness relating to the present as monitoring and the discourse awareness relating to the past as query (quantitative analysis) to the moderators of the e-discourse.
Computers fundamentally changed the methods used by social scientists during the past decades. It is no exaggeration to state that the wide use and growing user-friendliness of computers and statistical analysis systems helped empirical social research as a subdiscipline to become mainstream. This made a new subdiscipline necessary which is mainly working on adapting and applying computer science methods for social research: social science informatics. This book originated from lecture courses given by the authors from the mid-1980s and developed for computer science students with a minor in social science. Unlike many other introductions to univariate and multivariate data analysis, this book is addressed to advanced scholars and students who apply "classical" statistical methods and who want to get an overview of the mathematical foundations of the methods they apply and who want to avoid the pitfalls of cookbook-like introduction when they interpret their results. The electronic document is a slightly revised version of the printed version of 1994 which has been out of stock for many years.