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Context, particularly location, is an important source of information for human-computer interaction. In our project, we examine hardware, networking, and systems issues for a location sensing infrastructure. We present a thorough empirical analysis of the TinyOS RF motes. This analysis is leveraged to build a model of the RF signal strength. We have built(More)
Rafael Ballagas is a computer science doctoral candidate in the Media Computing Group at RWTH Aachen. His research interests include tangible interfaces for ubiquitous computing environments and interactive media applications. Rafael has developed the iStuff [2] toolkit for prototyping physical user interfaces and the Patch Panel [3] intermediary to support(More)
Remote support for physical tasks often takes a longer time and involves more mistakes than on-site support. The reason for this is that it is difficult for remote supporters to know what happened at the site and show how to operate briefly. In this paper, we propose a remote support system named <i>TeleTorchlight</i> that works between a tablet and a(More)
This work examines whether templates designed from principles of multimedia learning design, and learning sciences research, can support peer instruction in creating more effective educational content on the web. Initial results show that the structure and guidelines within these templates can help novices produce meaningful learning content while improving(More)
In this project we surveyed people about their mobile email use and built paper prototypes to explore integrating touch and speech within mobile email. We found that users were interested in our design alternatives that had multi-modal speech and touch components for email composition and error recovery as well as for cross application tasks such as adding(More)
BACKGROUND Evolving research practices and new forms of research enabled by technological advances require a redesigned research oversight system that respects and protects human research participants. OBJECTIVE Our objective was to generate creative ideas for redesigning our current human research oversight system. METHODS A total of 11 researchers and(More)
The digitization of knowledge work has led to an increase in computer-related interruptions. Recovering from interruptions can get harder over time as knowledge about the suspended activity fades from memory. Prior research suggests that digital reinstatement systems should not only be concerned reminding users with previous content but also of their(More)
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