Rikard Rydberg

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ion level system When investigating a system that involves multiple systems the need to define what system that are of interest and the ones that are not is crucial. This could be executed by working with different levels of abstraction when gaining knowledge about the system. In chapter 8 of the book System engineering analysis, design and development by(More)
Eighty class I and class II light-cured posterior composite resin restorations were compared with 43 class I and class II amalgam restorations during a 5-year period after placement. The results of this clinical study showed that both materials were satisfactory during the time period and that the only significant statistical differences are a poorer(More)
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