[Virtual DEGUM-certified course in the head and neck region-a useful complement to conventional course formats?].

Background: Training in clinical ultrasound has become highly relevant for working as an otorhinolaryngologist. While there is a high demand for standardized and certified training courses, until recently, there was no possibility to attend web-based and exclusively virtual head and neck ultrasound courses certified by the Deutsche Gesellschaft für Ultraschall in der Medizin (DEGUM; German Society for Ultrasound in Medicine).

Objective: The aim of this study was to provide a qualitative and semi-quantitative analysis of the first purely virtual DEGUM-certified head and neck ultrasound courses.

Circulation as a Visual Practice.

This special issue looks at some of the ways that images are adopted, co-opted, and adapted in the life sciences and beyond. It brings together papers that investigate the role of visualization in scientific knowledge-production with contributions that focus on the distribution and dissemination of knowledge to a broader audience. A commentary provides a critical perspective.

Direct numerical simulation of an unsteady wall-bounded turbulent flow configuration for the assessment of large-eddy simulation models.

A new benchmark case for the evaluation of direct numerical simulation (DNS) and large-eddy simulation (LES) models and methods is presented in this study. The known Taylor-Green vortex is modified by replacing the periodic boundary conditions in one direction with a no-slip boundary. A passive scalar is added and transported from the wall into the fluid.

A randomized controlled trial of a preventive intervention for the children of parents with depression: mid-term effects, mediators and moderators.

Background: In a parallel randomized controlled trial the effectiveness of the family- and group-based cognitive-behavioural "Gug-Auf" intervention in preventing depression in children of depressed parents was evaluated. We hypothesized that the intervention would be associated with reduced incidence of depression at 15 months as well as with reduced symptom severity at 6, 9, and 15 months. We also explored the role of a number of mediators and moderators.