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We present an approach to analyze mixing in flow fields by extracting vortex and strain features as extremal structures of derived scalar quantities that satisfy a duality property: They indicate vortical as well as high-strain (saddle-type) regions. Specifically, we consider the Okubo-Weiss criterion and the recently introduced M<sub>Z</sub> criterion.(More)
INTRODUCTION The aim of this study was to assess the relationship between gender role orientation and the prevalence of chronic pain. METHOD The individual gender role orientation in a sample of 45 chronic pain patients (ICD 10 diagnosis, F 45.4) was compared to gender role orientation in a matched, pain-free control group. Gender role orientation was(More)
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