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Institute
Die vorliegende Diplomarbeit untersucht die Emergenz eines gemeinsam genutzten Lexikons anhand einer Implementierung des Modells von Edwin Hutchins und Brian Hazlehurst. Zunächst erläutert diese Arbeit das oben genannte Modell und analysiert sowohl verschiedene Simulationstechniken, insbesondere die der Multi-Agenten-Simulation, als auch den Aufbau und die Funktionalität künstlicher neuronaler Netze, welche als Hauptbestandteile des Modells angesehen werden können. Der Modellbeschreibung folgen Entwurf, Architektur und eine detaillierte Erläuterung der Implementierung des Werkzeugs LexLearn. LexLearn ist ein in Java komplett neu konzipiertes und implementiertes Programm und bietet dem Benutzer die Möglichkeit, die Emergenz einer gemeinsam genutzten Sprache innerhalb verschiedener Agentengemeinschaften zu simulieren und zu analysieren. In mehreren Simulationsdurchläufen werden sowohl die Ergebnisse von Edwin Hutchins und Brian Hazlehurst reproduziert als auch weitere Erkenntnisse durch neu erstellte Simulationen gewonnen.
In usage of information systems the maintenance of their actuality and their extensibility is of importance. There is a constant reoccurrence of situations, when these goals cannot be supported by keeping on the old system, the legacy system. A solution for that is its migration into a new environment. The migration of software is to be considered as a subdiscipline of software engineering, more precisely, as a part of software maintenance. In this thesis the reference migration process model ReMiP, introduced in another thesis of the institute, was applied. The goal of this examination is to bring this model to practice in a website migration project and to analyze its validity. Here, especially the subject of completeness and generalizability of the model for migration processes and the gathering of concrete experiences with the intensity of its activities is of interest. The target environment for the website migration will be the content management system Plone. Within this thesis it will be described thoroughly. Finally, the website to migrate will be brought to its new target environment. The result of this thesis is the migrated GXL-Website in the target system Plone using the ReMiP. By this migration, the ReMiP was successfully validated as a reference process model for software migrations.
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.