The management of scientific events is a prestigious job that goes together with many tasks that have to be carried out in a timely and highly parallel fashion. Conference management systems (CMSs) have simplified the process and have given decision-support features to the organizers but still there is room for improvements. With the social media movement of the last decade, computer-mediated social interactions and professional networking have also gained importance for scholars. Those interactions take place outside of CMSs. Thus, a rich source of information is ceded to social networking services that could be used for a better quality of service and more awareness support for all stakeholders in CMSs. In this paper we introduce ginkgo as a novel approach to scientific event management that brings together well-known features of classic CMSs with those of common features of social networking sites to make scientific event management more social and awareness supporting.

Tangible objects on a \tabletop offer a lot of different opportunities to interact with an application. Most of the current tabletops are built using optical tracking principles and especially LLP tabletops provide very good tracking results for touch input. In this paper we introduce HOUDINI as a method for LLP object tracking and pen recognition, which is based on three different sizes of touch points that help us to identify touch points belonging to fingers, objects and pens. As a result, the whole recognition process is performed at the level of touch information rather than frame by frame image analysis. This leads to a very efficient and reliable tracking, thus allowing the objects to be moved very fast without being lost.

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