Arjan van Zadelhoff

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Class diagrams play an important role in software development. However, in some cases, these diagrams contain a lot of information. This makes it hard for software maintainers to use them to understand a system. In this paper, we aim to discover how to simplify class diagrams in a such way that they make systems easier to understand. To this end, we(More)
In December 1985 we started a study to determine the prevalence and risk factors of HIV infection among drug users and drug-using prostitutes in Amsterdam. Recruitment took place at methadone posts (not drug-free; i.e. a low-threshold programme on which some drug users continue to use hard drugs, but at a lower level) and the weekly evening sexually(More)
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