Ronald Hartwig

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cDNAs of fibrinogen A alpha and gamma chains were individually subcloned into a eukaryotic expression vector by using the polymerase chain reaction. Triple cotransfection into COS cells of the two plasmids together with a B beta chain expression plasmid, constructed as described previously (Danishefsky, K.J., Hartwig, R., Banerjee, D., and Redman, C. (1990)(More)
The production process of multimedia learning material includes many participants, tasks, and tools. The system described in this paper combines all data from the development and production processes into one semantic web based and XML-coded system. The contents are kept using object-oriented development concepts, such as “inheritance”, to cope with large(More)
Today there are several approaches available to develop usable software, but many products still lack a minimum of usability. One reason may be the lack of usability in some “heavyweight” usability engineering and evaluation methods themselves. It seems that many development teams think such elaborate process models are too complex to be applied, so they(More)
The production process of multimedia learning material includes many participants, tasks, and tools. The system described in this paper combines all data from the development and production processes into one semantic web based and XML-coded system. The contents are kept using object-oriented development concepts, such as “inheritance”, to cope with large(More)
The paper describes an integrated approach on how to implement quality management regarding the special usability of learning modules while building a virtual university. The approach is based on a simplification of the official German accreditation standard for testing and certifying the usability of software products. This standard had to be decreased in(More)
Dieser Artikel beschreibt einen ganzheitlichen Ansatz, Qualitätsmanagement bei der Entwicklung von multimedialen und teilweise interaktiven Lernmodulen unter besonderer Berücksichtigung der Anforderungen der Softwareergonomie im praktischen Einsatz zu verankern. Die Erfahrungen stammen aus einem aktuellen Projekt eines virtuellen Fachhochschulverbundes.(More)
Full-length fibrinogen B beta cDNA was subcloned into an expression vector, pBC12BI, and transfected into COS cells. B beta chain expression was measured by pulse-labelling cells with L-[35S]methionine, immunoprecipitating the B beta chain with antibody to fibrinogen and separating the nascent radioactive protein by sodium dodecyl sulfate-polyacrylamide gel(More)
Dieser Artikel thematisiert den Entwicklungsprozess von web-basierten Lerneinheiten. Dies geschieht vor dem Hintergrund, dass zu Beginn der Nutzung des WWW im Rahmen von Lehr-/Lernszenarien nur die reine Bereitstellungsund Verteilfunktion von Lernmaterialien im Internet im Vordergrund stand. Mittlerweile hat sich aber das Interesse am WWW auf seine Nutzung(More)