TOCS Event-Silicon Valley Campus - Carnegie Mellon University

TOCS Event


Hedda Schmidtke

Hedda Schmidtke
Assistant Professor, CMUSV


July 24, 1:30 pm



CMUSV, Rm 118 [directions]

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Title: No Trade-Off? Context-Aware Systems are Both Smart and Scalable
Abstract: Adding reasoning abilities to context-aware systems has been a focus of research in pervasive computing for several years and a broad range of approaches has been suggested. In particular, the well-known trade-off between expressivity and inferential power has been discussed as a major theoretical concern, as dimensions of context include well-known hard domains for reasoning, such as spatial, temporal, and causal knowledge. In practice however, context-aware applications can usually be tuned to have acceptable run-times and complexity of reasoning is somehow seldom an issue at all. Two questions are addressed in this talk: why this is the case and whether these positive results will scale up as context-aware systems are leaving their experimental environments to be employed in everyday life by millions of end-users. In the talk, I will compare results from pervasive computing, qualitative spatial and temporal reasoning, and logic-based contextual reasoning showing interrelations between tractable reasoning systems in these three areas. I will identify a class of representation mechanisms, which I call partial order reasoning systems, that forms a common core of tractable reasoning in the three areas. The properties of partial order reasoning entail that the context-aware systems using it will indeed scale up. Practical examples from a mobile application system we implemented illustrate the surprising, widely untapped potential for applications.
Speaker Bio: Hedda R. Schmidtke is assistant professor in Information and Communications Technology at CMU Rwanda and CMU Silicon Valley. Her main research interest is on intelligent applications for light-weight mobile and distributed systems, including computing platforms such as RFID, mobile phones, and Smart Spaces. She has publications in the areas Smart Environments, Internet of Things, Ubiquitous/Pervasive Computing, Artificial Intelligence, Knowledge Representation, Wireless Sensor Networks, Geographic Information Systems, and Cognitive Science. Until 2011, Dr. Schmidtke was research director of the TecO group at Karlsruhe Institute of Technology (KIT), Germany. Until 2009, she was research professor at Gwangju Institute of Science and Technology (GIST) in South Korea. She holds a doctoral degree in computer science from the University of Hamburg, Germany (2005).