Papers by Dietmar Wikarski
Proceedings of the First International Conference on Engineering and Deployment of Cooperative Information Systems , Sep 17, 2021
At the end of this once again difficult year 2021, we look back on a successful cooperation betwe... more At the end of this once again difficult year 2021, we look back on a successful cooperation between the Brandenburg University of Applied Sciences (THB) and the Masinde Muliro University of Science and Technology (MMUST) in Western Kenya, which began in 2017 and has now been funded by the DAAD for almost 4 years. This volume contains the written versions of the presentations given by the Kenyan participants of the final workshop, which took place in August 2021 at the Technische Hochschule in Brandenburg an der Havel. The contributions give an impression of what has been achieved in recent years on the way to a more practice-oriented higher education in the participating departments of MMUST and what is still to be done in the near future. The cooperation between THB and MMUST started with a project between THB and the NGO Agrokenya, which was founded by THB's Kenyan alumnus Suleiman Kweyu after he graduated in 2017. Shortly after its establishment, MMUST became involved through a tripartite agreement between MMUST, THB and Agrokenya. As a support to local farmers in the Kakamega region, the first "materialised" aid was the installation of a flowdriven water pump invented by the Magdeburg-Stendal University of Applied Sciences (HMS) in the Lusumu River. A few months later, THB received a two-year DAAD grant with the aim of contributing to a German-Kenyan network that would lead to a German-Kenyan university of applied sciences. Now, in addition to the School of Agriculture, Veterinary Sciences and Technology (SAVET), other faculties and departments of MMUST and THB have been included in the DAAD-funded project "Practice-oriented Higher Education in Western Kenya" (ProUniEdu-WeK). In addition, to cover the important areas of agriculture and engineering, two other German universities of applied sciences-the Eberswalde University of Applied Sciences (HNEE) and the above-mentioned HMS-were involved through formal agreements and real professors. In this composition, teachers and researchers have now been working successfully for 4 years in international and multidisciplinary teams on practice-oriented concepts for university teaching. Originally, the project was to run only until the end of 2019 as part of a DAAD-funded network, but-in the expectation of further results-it was extended until the end of 2020, without, however, having in mind the consequences of the COVID 19 pandemic, which were not yet foreseeable at that time. These meant, among other things, that neither the planned trips nor live workshops could take place in 2020.
Innovationsmanagement und Prozessmanagement streben nach überlegenen Prozessen für Unternehmen. D... more Innovationsmanagement und Prozessmanagement streben nach überlegenen Prozessen für Unternehmen. Doch beide Ansätze lassen sich auch verbinden.
Wissenschaftsmanagement, 2011
Innovationsaktivitäten von Unternehmen wie auch Literatur zum Thema Innovation
stellen bisher me... more Innovationsaktivitäten von Unternehmen wie auch Literatur zum Thema Innovation
stellen bisher meist auf Produktinnovationen ab. Diese sind zweifellos wichtig.
Dennoch wird zunehmend auf die Bedeutung von leistungsfähigen Prozessen in
Unternehmen verwiesen, da diese oft ein nachhaltigeres wettbewerbliches Differenzierungspotenzial als Produktneuerungen besitzen. Dabei stellt sich die Frage: Wie können überlegene Prozesse hervorgebracht und installiert werden?
Die Beantwortung dieser Frage versuchen Konzepte der Prozessinnovation aus dem Innovationsmanagement einerseits sowie das Prozessmanagement andererseits. Der Beitrag beleuchtet, in welcher Hinsicht sich beide Konzepte unterscheiden, wo Koppelstellen bestehen und in welchen Bereichen gar eine Verschmelzung vielversprechend erscheint.
Eigenschaften homogener Markowscher Prozesse mit diskretem strukturiertem Zustandsraum und ihre Anwendung zur Berechnung stationärer Zustandswahrscheinlichkeiten
At the end of this once again difficult year 2021, we look back on a successful cooperation betwe... more At the end of this once again difficult year 2021, we look back on a successful cooperation between the Brandenburg University of Applied Sciences (THB) and the Masinde Muliro University of Science and Technology (MMUST) in Western Kenya, which began in 2017 and has now been funded by the DAAD for almost 4 years. This volume contains the written versions of the presentations given by the Kenyan participants of the final workshop, which took place in August 2021 at the Technische Hochschule in Brandenburg an der Havel. The contributions give an impression of what has been achieved in recent years on the way to a more practice-oriented higher education in the participating departments of MMUST and what is still to be done in the near future. The cooperation between THB and MMUST started with a project between THB and the NGO Agrokenya, which was founded by THB's Kenyan alumnus Suleiman Kweyu after he graduated in 2017. Shortly after its establishment, MMUST became involved through a tripartite agreement between MMUST, THB and Agrokenya. As a support to local farmers in the Kakamega region, the first "materialised" aid was the installation of a flowdriven water pump invented by the Magdeburg-Stendal University of Applied Sciences (HMS) in the Lusumu River. A few months later, THB received a two-year DAAD grant with the aim of contributing to a German-Kenyan network that would lead to a German-Kenyan university of applied sciences. Now, in addition to the School of Agriculture, Veterinary Sciences and Technology (SAVET), other faculties and departments of MMUST and THB have been included in the DAAD-funded project "Practice-oriented Higher Education in Western Kenya" (ProUniEdu-WeK). In addition, to cover the important areas of agriculture and engineering, two other German universities of applied sciences-the Eberswalde University of Applied Sciences (HNEE) and the above-mentioned HMS-were involved through formal agreements and real professors. In this composition, teachers and researchers have now been working successfully for 4 years in international and multidisciplinary teams on practice-oriented concepts for university teaching. Originally, the project was to run only until the end of 2019 as part of a DAAD-funded network, but-in the expectation of further results-it was extended until the end of 2020, without, however, having in mind the consequences of the COVID 19 pandemic, which were not yet foreseeable at that time. These meant, among other things, that neither the planned trips nor live workshops could take place in 2020.
In this paper a Petri net based methodology is outlined for an integrated qualitative and quantit... more In this paper a Petri net based methodology is outlined for an integrated qualitative and quantitative analysis of parallel software systems which is based on different (Petri) net representations of the software system under consideration. The software validation methodology starts from the source text of a set of communicating processes which specify the system under development. From this source text skeleton, a Petri net representation of the general control structure of the system is generated. On this basis a set of reduction steps is defined for transforming the net into different intermediate representations allowing the validation of both qualitative and qualitative properties. Particular attention is paid to the validation of quantitative properties which is performed using a transformation into locally Markovian Object Nets (MONs). Models of this new class of modular Petri nets are obtained by property-preserving structural compression and by enhancement with quantitative information. This information is obtained in the form of frequency and delay parameters by monitoring and testing the software on the basis of prototypes. Compared to a previous paper on the same topic /Heiner94/, the methodology as well as its presentation have been improved. In particular, a new, more comprehensive running example has been selected and the object net approach is explained in much more detail.
Netze - Wie man über sie und mit ihrer Hilfe kommunizieren kann (Teil 1 -- Einführung)
LOG IN, 1997
An Approach to Petri Net Based Integration of Qualitative and Quantitative Analysis of Parallel Systems
Starting from a classification of software validation techniques an innovative Petri net based me... more Starting from a classification of software validation techniques an innovative Petri net based methodology is proposed to integrate qualitative and quantitative analysis methods of parallel software systems. The approach combines qualitative analysis, monitoring and testing as well as quantitative analysis on the basis of a net-based intermediate representation of the parallel software system under consideration. The validation of qualitative properties comprises two steps. At first, the context checking of general semantic properties is done by a suitable combination of static and dynamic analysis techniques of Petri net theory. Afterwards, the verification of well-defined special semantic properties given by a separate specification of the required functionality is performed. The validation of quantitative properties is based on so-called locally Markovian Object Nets (MONs) which are obtained from the qualitative models by property-preserving structural compression and quantitati...
International Computer Science Institute, UC Berkeley, Technical Report TR-96-019, 1996
Modular process nets are a graphical and formal notation for the representation of technical and ... more 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 elementary process nets. The module concept is part of a more general (“object-based”) approach to Petri nets allowing several types of abstraction, 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 module and communication concepts and optionally enhanced by the use of a task concept, a method which is known from the areas of computer-supported cooperative work (CSCW) and workflow 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.
The First Phylogenomics Conference was held in Ste-Adèle (Québec, Canada) in March 2006. Selected... more The First Phylogenomics Conference was held in Ste-Adèle (Québec, Canada) in March 2006. Selected papers appear in this special issue of BMC Evolutionary Biology. Here, we give an introduction to the field and provide an overview of the articles presented in this issue.
Approximation of Mean Waiting Times in Closed Queueing Networks with Priority Nodes and Deterministic Routing
Netze - Wie man über sie und mit ihrer Hilfe kommunizieren kann (Teil 2)
Login, 1997
Lehren und Lernen mit Multimedia
LOG IN, 1997
Visual knowledge 1 maps are being used to improve the communication processes within global organ... more Visual knowledge 1 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 formalization 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.
Visual knowledge 1 maps are being used to improve the communication processes within global organ... more Visual knowledge 1 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 formalization 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.
Visual knowledge 1 maps are being used to improve the communication processes within global organ... more Visual knowledge 1 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 formalization 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.
Approximation of Mean Waiting Times in Closed Queueing Networks with Priority Nodes and Deterministic Routing
Modular process nets are a graphical and formal notation for the representation of technical and ... more 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.
Proceedings of the First International Conference on Engineering and Deployment of Cooperative Information Systems, 2002
Visual knowledge 1 maps are being used to improve the communication processes within global organ... more Visual knowledge 1 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 formalization 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.
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Papers by Dietmar Wikarski
stellen bisher meist auf Produktinnovationen ab. Diese sind zweifellos wichtig.
Dennoch wird zunehmend auf die Bedeutung von leistungsfähigen Prozessen in
Unternehmen verwiesen, da diese oft ein nachhaltigeres wettbewerbliches Differenzierungspotenzial als Produktneuerungen besitzen. Dabei stellt sich die Frage: Wie können überlegene Prozesse hervorgebracht und installiert werden?
Die Beantwortung dieser Frage versuchen Konzepte der Prozessinnovation aus dem Innovationsmanagement einerseits sowie das Prozessmanagement andererseits. Der Beitrag beleuchtet, in welcher Hinsicht sich beide Konzepte unterscheiden, wo Koppelstellen bestehen und in welchen Bereichen gar eine Verschmelzung vielversprechend erscheint.
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 elementary process nets. The module concept is part of a more general (“object-based”) approach to Petri nets allowing several types of abstraction, 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 module and communication concepts and optionally enhanced by the use of a task concept, a method which is known from the areas of computer-supported cooperative work (CSCW) and workflow 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.