Modi der Besonderung als Distinktionspraxen im Elementarbereich

As a new phenomenon in German ECEC, commercial high-cost childcare centers are subject of controversial debates. The expansion of this type of early care provision raises concerns about the possible reinforcement of social inequalities in early childhood. However, mechanisms of distinction within these institutions cannot be matched to such criteria as type of organization or features of the facilities. In this paper we argue that the interactions between professionals and parents have to be focused as crucial sites of the production of distinction. Using data from an ongoing qualitative research project we elaborate on three modes of interactive production of particularization. Based on these findings, we show that a reconstruction of the unique organizational cultures is indispensable to address questions of new vertical differentiations within the field of ECEC institutions.     

Automated LED tracking to measure instantaneous velocities in swimming

In this paper a video-based method to automatically track instantaneous velocities of a swimmer is presented. Single cameras were used to follow a marker (LED) attached to the body. The method is inspired by particle tracking techniques, traditionally used in the field of fluid dynamics, to measure local velocities of a fluid flow. During the validation experiment, a white LED was attached to the hip of a swimmer together with a speedometer. A swimmer performed four different stroke types. The velocity profiles using LED tracking were captured and showed less noise than the speedometer measurements. Only at times when the marker disappeared above the water surface due to body role in front crawl and backstroke swimming did the LED tracking fail to capture the athlete’s motion. The algorithm was tested in a 2D case with a single LED to illustrate the proof of principle, but should be suitable for implementation in a 3D analysis or multiple LED analysis.