- General Manager at teambits GmbHedit
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There is a wealth of digital information accessible through computers. However, most interfaces are oriented towards adults. To fill this void, we are developing a collaborative digital library application for young children. Our... more
There is a wealth of digital information accessible through computers. However, most interfaces are oriented towards adults. To fill this void, we are developing a collaborative digital library application for young children. Our prototype system, QueryKids, offers a graphical interface for querying, browsing and reviewing search results for multiple children using multiple mice. Early studies show that QueryKids successfully supports one user searching for media, and our informal observations show that two users have ...
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With the development of novel tabletop technologies there is also a growing research interest in cooperative work with interactive tables. This paper presents an analysis of the different kinds of traditional tables that exist in an... more
With the development of novel tabletop technologies there is also a growing research interest in cooperative work with interactive tables. This paper presents an analysis of the different kinds of traditional tables that exist in an office environment. The tables' relation to the range of activities that they afford and support are discussed. Concluding from this, design issues for interactive
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In the past, a central mainframe computer provided terminals for many users. In the current age of the personal desktop computer, there is one computer for one person. Observation of early adopters and predictions about the future point... more
In the past, a central mainframe computer provided terminals for many users. In the current age of the personal desktop computer, there is one computer for one person. Observation of early adopters and predictions about the future point to an era where each person will have multiple devices and computational power will be ubiquitous. Against this background, we present a
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... Carsten studied Cognitive Sciences at the University of Mainz, Germany, where he earned his diploma in 2001 ... He is Fraunhofer IPSI's representative in the Ladenburger Kolleg “Living in asmart environment” of the Daimler-Benz... more
... Carsten studied Cognitive Sciences at the University of Mainz, Germany, where he earned his diploma in 2001 ... He is Fraunhofer IPSI's representative in the Ladenburger Kolleg “Living in asmart environment” of the Daimler-Benz foundation that deals with the social implications ...
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... Smalltalk. Our first experiences with the current version of BEACH are quite promising. We used the prototype at the German computer fair CeBIT in March 1999 to give interactive presentations using a DynaWall and a CommChair. ...
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Page 1. International Journal of e-Collaboration, 4(1), 1-19, January-March 2008 1 Copyright © 2008, IGI Global. Copying or distributing in print or electronic forms without written permission of IGI Global is prohibited. AbstRACt ...
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Computer technology has evolved to a stage where it is available everywhere and every time - even in meetings. The pattern language presented in this paper sheds light on how to make use of technology when preparing and conducting a... more
Computer technology has evolved to a stage where it is available everywhere and every time - even in meetings. The pattern language presented in this paper sheds light on how to make use of technology when preparing and conducting a meeting. We collected advice both on social practices of good meetings as well as on implications for technology support in
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As recognition of pen gestures tends to be ambiguous and error-prone, it is essential that users get feedback about recognized shapes as early as possible. This is especially important in modeless user interfaces with no separate modes... more
As recognition of pen gestures tends to be ambiguous and error-prone, it is essential that users get feedback about recognized shapes as early as possible. This is especially important in modeless user interfaces with no separate modes for writing and gesturing. In this paper, we propose to give feedback continuously while users draw, as this allows immediate correction of minor
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ABSTRACT Many ubiquitous computing scenarios deal with cooperative work situations. To successfully support these situations, computer-supported co-operative work (CSCW) concepts and technologies face new challenges. One of the most... more
ABSTRACT Many ubiquitous computing scenarios deal with cooperative work situations. To successfully support these situations, computer-supported co-operative work (CSCW) concepts and technologies face new challenges. One of the most fundamental concepts for cooperation is sharing. By analyzing applications of sharing in the context of ubiquitous computing it can be shown that ubiquitous computing enables an extended view on sharing. In this paper, we show that this extended view seamlessly integrates the view of “traditional” CSCW and additionally incorporates ubiquitous, heterogeneous, and mobile devices used in a common context.
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Playing games has always been a joint activity. New hardware de-velopments such as multi-user touch-sensitive tabletop surfaces offer new pos-sibilities to support games with information technology. This paper analyzes the properties of... more
Playing games has always been a joint activity. New hardware de-velopments such as multi-user touch-sensitive tabletop surfaces offer new pos-sibilities to support games with information technology. This paper analyzes the properties of games that are relevant for choosing an appropriate hardware setup, e.g. the need for public or personal data for different players. These prop-erties lead us to a categorization of games. Based on these results, possible hardware configurations for different game categories are discussed. Four sam-ple games are presented by which the influence of the hardware setup on the game has been studied. The paper concludes with the lessons learned from our classification of games and their weaknesses and the next steps we are going to make.
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Today there exist many frameworks for the development of synchronous groupware applications. Although the domain of these applications is very heterogeneous, existing frameworks provide only limited flexibility to integrate diverse... more
Today there exist many frameworks for the development of synchronous groupware applications. Although the domain of these applications is very heterogeneous, existing frameworks provide only limited flexibility to integrate diverse groupware applications in a meaningful way. We identify five variation points that a groupware framework needs to offer in a flexible way in order to facilitate the integration of diverse
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There is currently little reuse of either design or code in the development of collaborative applications. Though there are some application frameworks for this domain, they tend to be rather inflexible in the functionality they offer.... more
There is currently little reuse of either design or code in the development of collaborative applications. Though there are some application frameworks for this domain, they tend to be rather inflexible in the functionality they offer. This paper seeks to provide design reuse in the form of architectural patterns that focus on low-level horizontal issues: distribution, message exchange, functional decomposition,