Effiziente Vertr?glichkeitsprüfung und automatische Migration von Workflow-Instanzen bei der Evolution von Workflow-Schemata

Zusammenfassung.   Sollen Workflow-Management-Systeme (WfMS) in umfassender Weise für die rechnerbasierte Verwaltung und Steuerung von Gesch?ftsprozessen einsetzbar sein, müssen die von ihnen verwalteten Workflow-Schemata und -Instanzen bei Bedarf rasch anpassbar sein. Dabei müssen die auf Basis eines (alten) Workflow-Schemas erzeugten Instanzen auch nach dessen ?nderung ungest?rt weiterlaufen k?nnen, etwa durch Bereitstellung geeigneter Versionskonzepte. Sehr viel schwieriger wird es, wenn die angewandten Schema?nderungen – wo gewünscht und m?glich – auch auf die bereits (vielleicht in gro?er Zahl) laufenden Workflow-Instanzen übertragen werden sollen. Dies bei Bedarf zu k?nnen – und zwar ohne Inkonsistenzen oder Fehler zu verursachen – ist aber ungemein wichtig, wenn ein WfMS breit und flexibel einsetzbar sein soll. In diesem Beitrag wird ein Ansatz zur effizienten Prüfung der Vertr?glichkeit von Workflow-Instanzen mit einem ge?nderten Workflow-Schema vorgestellt. Durch Einbeziehung aller Beschreibungskonstrukte (z.B. auch Schleifen und Datenflüsse) und damit zusammenh?ngender Fragestellungen wird darüber hinaus zum ersten Mal die Grundlage für ein umfassendes ?nderungsmanagement geschaffen. Au?erdem wird aufgezeigt, wie der Benutzer bei der Migration vertr?glicher Instanzen auf das neue Schema konkret unterstützt werden kann. ID="*" Diese Arbeit wurde im Rahmen des Projekts „?nderungsmanagement in adaptiven Workflow-Management-Systemen” der Deutschen Forschungsgemeinschaft (DFG) erstellt.     

Empirische Bildungsforschung und evidenzbasierte Bildungspolitik

This paper discusses opportunities as well as constraints of evidence based policy and evidence based practice in education. Expectations held by different strands of the public (policy makers, teachers, parents) are discussed as constraint of the underlying educational research. Furthermore, such expectations constrain the communication between researchers and the public (a case of science communication). Communicating empirical evidence is a precondition for any evidence based policy in education.     

“TPACK Stories”: Schools and School Districts Repurposing a Theoretical Construct for Technology-Related Professional Development

TPACK (Koehler &; Mishra, 2008 Koehler, M., &; Mishra, P. (2008). Introducing TPCK. In AACTE Committee on Innovation and Technology (Ed.), Handbook of technological pedagogical content knowledge (TPCK) for educators (pp. 3–31). New York, NY: Routledge. [Google Scholar]), a theoretical construct that describes the knowledge that teachers use to teach with digital tools and resources, has flourished in university-based teacher education and research. Increasingly, K–12 schools and districts have also appropriated TPACK in their professional development efforts. This study of seven schools and districts explored how the TPACK construct was understood and used in these K–12 organizations. Study results revealed the importance of context and professional culture in appropriating the construct; the use of TPACK as a way to connect disparate professional development initiatives; TPACK conceptualized as applied knowledge; and how educational leaders' beliefs about professional development shape how TPACK is understood and enacted. (Keywords: TPACK, TPCK, professional development, context)     

Beliefs About Knowledge and Knowing: Integrating Domain Specificity and Domain Generality: A Response to Muis, Bendixen, and Haerle (2006)

In their review of the empirical research, Muis, Bendixen, and Haerle (2006) bring closure to the debate between domain specificity and domain generality of epistemic beliefs and provide a framework for future research. In response to their review, this article comments on issues that remain for those who wish to examine the nature of the interaction between epistemic domain specificity and domain generality and its relation to learning. These issues include methodological concerns, philosophical contributions, terminology, epistemology beyond academic domains, and educational implications.     

Self-esteem and satisfaction with life of deaf and hard-of-hearing people--a resource-oriented approach to identity work

In the context of the current identity discussions, the interrelations between acculturations, psychological resources, and self-esteem as well as the satisfaction with life of deaf and hard-of-hearing people (N = 629) were examined by means of a questionnaire-based survey. To check these interrelations, one-factor and two-factor analyses of variance were employed. The results show that bicultural, deaf, and hearing acculturation styles have the advantage over marginal acculturation, but the results for marginal acculturation need to be discussed in depth to ensure a comprehensive understanding of them. All in all, bicultural acculturation seems to be a secure option for psychosocial well-being. The availability of psychological resources (optimism, self-efficacy) seems to be of special importance for the quality of self-esteem and satisfaction with life. On the other hand, the power of these psychological resources is closely associated with good communicative conditions in the individual biographies of the participants in this study as well as with their education level. Going beyond a methodological discussion then, the mission for educators would seem to be one of making good communicative conditions available to each deaf or hard-of-hearing child and optimizing academic achievement so as to ensure a secure, comprehensive, and differentiated opening up of the world and psychological empowerment. In this way, a good foundation can be laid for developing quality of life.     

Teacher Development of Computer Use in Education in Germany

During the last 25 years efforts in the German educational system on different levels were made to introduce computers in schools. In parallel teacher training and consultation was established. Results from the international IEA-study Computers in education for lower secondary level in 1992, but also for upper secondary level in 1989 show that teachers attitudes to learn something about computer use are positive: The training need and their self-confidence to learn something about computers is relatively high. Support for teachers is mainly given by formal training. But the offers in teacher training are limited concerning the needs of teachers for different subjects. This situation is comparable with other countries in the world as documented in the additional publication of national case studies of the IEA. As a consequence a part of the teachers get their help through self-studies and private preparation of course material. In recent years the use of computers for networking and multimedia applications developed rapidly. The integration of these technologies into the subjects is another field demanding intensive efforts in teacher training. Different programs for the development of this field were established, but still offers for teacher training are insufficient. As a new perspective for educational change in this rapidly growing field a classroom-based teaching and learning approach in a collaborative network is proposed.     

Gibt es Erkenntnisfortschritte in der Allgemeinen Didaktik? Ein empirischer Beitrag zur disziplinären Entwicklung der Schulpädagogik

This article deals with the disciplinary development of school pedagogy using the example of the development of general didactics theories. Addressing the question of progress in scientific knowledge of general didactics, we examine whether school pedagogy has established typical forms of disciplinary communication. In order to answer this question, we present the findings from a research project on the representations of the concept of didactics in pedagogical reference books. New knowledge from didactical research is rarely reported and the predominance of a few approaches cannot be explained by the availability of more or substantial knowledge. The findings confirm recent research which demonstrates that school pedagogy exhibits structural characteristics of a scientific discipline but makes only limited use of those to maintain typical forms of disciplinary communication.