Johannes Drexler

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OMG’s SPEM – by means of its (semi-)formal notation – allows for a detailed description of development processes and methodologies, but can only be used for a rather coarse description of their behavior. Concepts for a more fine-grained behavior model are considered out of scope of the SPEM standard and have to be provided by other standards like BPDM/BPMN(More)
The combination of cyclophosphamide (CYC) and oral corticosteroids is effective in the majority of patients with antineutrophil cytoplasmic antibody-associated vasculitis (AASV), but it carries substantial risk of drug-related morbidity and mortality. New regimens are desired, especially in refractory cases. The immunosuppressant 15-deoxyspergualin (DSG) is(More)
To study the potential aftereffects of virtual environments (VE), tests of visually guided behavior and felt limb position (pointing with eyes open and closed) along with self-reports of motion sickness-like discomfort were administered before and after 30 min exposure of 34 subjects. When post- discomfort was compared to a pre-baseline, the participants(More)
OMG’s SPEM standard allows for a detailed modeling of software development processes and methods, but only a rather coarse description of their behavior. This gap can be filled by extending SPEM with a fine-grained behavior modeling concept based on UML activities and state machines. In order to gain full benefit from detailed software process models(More)
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