TY - RPRT A1 - Löwe, Michael A1 - Wikarski, Dietmar A1 - Han, Yanbo T1 - Higher order object nets and their application to workflow modeling T2 - Technische Universität Berlin / Fachbereich Informatik: Forschungsberichte des Fachbereiches Informatik ; Bericht-Nr. [19]95,34 Y1 - 1995 PB - Leiter der Fachbibliothek Informatik, Sekretariat FR 5-4 CY - Berlin ER - TY - JOUR A1 - Heiner, Monika A1 - Ventre, Giorgio A1 - Wikarski, Dietmar T1 - A Petri net based methodology to integrate qualitative and quantitative analysis JF - In: Information & Software Technology Volume 36(994)7, S. 435–441 N2 - An innovative net-based methodology to integrate qualitative and quantitative analysis of distributed software systems is outlined, and an on-going prototype implementation of a related graphic-oriented tool kit is sketched. The proposed method combines qualitative analysis, monitoring and testing as well as quantitative analysis on the basis of a net-based intermediate representation of the distributed software system under consideration. All transformations (from the distributed software system into a first Petri net model, and between the different kinds of net models) can be made formally, and therefore automated to a high degree. The evaluation of quantitative properties is based on so-called object nets which are obtained by a property-preserving structural compression and quantitative expansion of the qualitative model. In this way, the frequency and delay attributes necessary to generate quantitative models are provided by the monitoring and testing component. Y1 - 1994 ER - TY - JOUR A1 - Wikarski, Dietmar T1 - Netze - Wie man über sie und mit ihrer Hilfe kommunizieren kann (Teil 3 und Schluss) JF - In: Log in : informatische Bildung und Computer in der Schule 17(1997)6, 48- Y1 - 1997 ER - TY - JOUR A1 - Wikarski, Dietmar T1 - Wie man über sie und mit ihrer Hilfe kommunizieren kann (Teil 2) JF - In: Log in : informatische Bildung und Computer in der Schule 17(1997)3/4, 76 - Y1 - 1997 ER - TY - JOUR A1 - Wikarski, Dietmar T1 - Wie man über sie und mit ihrer Hilfe kommunizieren kann (Teil 1 -- Einführung) JF - In: Log in : informatische Bildung und Computer in der Schule 17(1997)2, 41 - Y1 - 1997 ER - TY - CHAP A1 - Kim, Hong-Gee A1 - Fillies, Christian A1 - Smith, Bob A1 - Wikarski, Dietmar T1 - Visualizing a Dynamic Knowledge Map Using Semantic Web Technology T2 - In: Engineering and deployment of cooperative information systems : first international conference ; proceedings / EDCIS 2002, Beijing, China, September 17 - 20, 2002. Yanbo Han ... (ed.). - Berlin [u.a.] : Springer. - 2002. - (Lecture notes in computer science ; Vol. 2480). - S. 130 - 140. - ISBN 3-540-44222-7 N2 - Visual knowledge maps are being used to improve the communication processes within global organizations. Knowledge maps are graphical presentations of ontological knowledge as well as of business processes. Especially for enterprises working in a multi-cultural space the explicit formaliza-tion of knowledge and business rules using graphical models seems to be a very promising approach in order to improve discussion and learning processes. Publishing and automatic inference or search techniques are becoming available due to the latest standards for Semantic Web worked out by W3C. This article gives an impression how to create end user interfaces for the ”Corporate Knowledge Base” using MS Office and Visio with the modeling tool SemTalk. Several problems on capturing and maintaining large scale knowledge bases are discussed. Specific attention is given to the problem of weighting and association of information from orthogonal ontologies, which arises while using the same concepts in different graphical scenarios. Y1 - 2002 U6 - https://doi.org/10.1007/3-540-45785-2_10 ER - TY - CHAP A1 - Faustmann, Gert A1 - Wikarski, Dietmar T1 - Exception Handling in Petri-Net-based Workflow Management T2 - In: Practical aspects of knowledge management : proceedings of the first international conference, Basel, Switzerland, October 30 - 31, 1996 / PAKM '96, [The First International Conference on Practical Aspects of Knowledge Management. Schweizer Informatiker-Gesellschaft; Swiss Group for Artificial Intelligence and Cognitive Science. Ed. by: Michael Wolf ...]. - Zürich, 1996. - Vol. 1. Y1 - 1996 ER - TY - CHAP A1 - Han, Yanbo A1 - Himmighöfer, Jürgen A1 - Schaaf, Thorsten A1 - Wikarski, Dietmar T1 - Management of Workflow Resources to Support Runtime Adaptability and System Evolution T2 - In: Practical aspects of knowledge management : proceedings of the first international conference, Basel, Switzerland, October 30 - 31, 1996 / PAKM '96, [The First International Conference on Practical Aspects of Knowledge Management. Schweizer Informatiker-Gesellschaft; Swiss Group for Artificial Intelligence and Cognitive Science. Ed. by: Michael Wolf ...]. - Zürich, 1996. - Vol. 1. Y1 - 1996 ER - TY - JOUR A1 - Wikarski, Dietmar T1 - An introduction to modular process nets JF - In: TR : Technical Report / International Computer Science Institute 96-019 N2 - Modular process nets are a graphical and formal notation for the representation of technical and business process models containing concurrent activities. Originally this class of Petri nets was developed for the modeling, analysis, simulation and control of workflows and computer-based process control systems, but it is also suitable for use in all other areas where a formal but comprehensible description of complex processes is needed. After a description of the basic aims and design decisions for modular process nets, the report gives a brief introduction to low-level Petri nets including different types of transition rules and aspects of the descriptive and prescriptive use of process models. The main and most innovative points which are explained in more detail are the introduction of a hierarchical module concept for nets and the definition of elementare process nets. The module concept is part of a more general ("object-based") approach to Petri nets allowing severaltypes of ab straction, whereas the main points of elementary process nets are synchronous and asynchronous communication between separately interpreted net instances via events and token passing. Modular process nets are low-level Petri nets equipped with these module and communication concepts and optionally enhanced by die use of a task concept, a method known from the areas of computer-supported cooperative work (CSCW) and work-flow management. Because the report is aimed at a systematic and easy-to-understand introduction to modular process nets, it provides a precise explanation of this net class which is kept as informal as possible and enhanced by some typical application examples KW - CSCW KW - modular net KW - object net KW - petri net KW - workflow management Y1 - 1996 ER - TY - CHAP A1 - Adametz, H. A1 - Barthel, B. A1 - Faustmann, G. A1 - Fleischer, J. A1 - Messer, B. A1 - Wikarski, Dietmar T1 - Konzepte flexibler Workflow-Management-Systeme T2 - In: Telekooperations-Systeme in dezentralen Organisationen : Tagungsband zum Workshop der GI-Fachgruppe 5.5.1 "CSCW in Organisationen" vom 22.-23. Februar 1996 / Kurt Sandkuhl ... (Hrsg.) . - Berlin [u.a.] : ISST, 1996. - ( ISST-Berichte ; 31/96 ). - S. 7 - 32 Y1 - 1996 ER - TY - CHAP A1 - Wikarski, Dietmar T1 - Modular Nets and Object Nets: A Unifying View T2 - In: Workshop Concurrency, Specification & Programming : October 12 - 15, 1994 / L. Czaja ... Hrsg.: Professoren des Institutes für Informatik. [Humboldt-Universität Berlin] . - Berlin : Professoren des Inst. für Informatik. - 1994. - (Informatik-Berichte ; 36) Y1 - 1994 ER -