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Full-Text Articles in Computer Sciences
Design And Implementation Of A Large-Scale Context Fusion Network, Guanling Chen, Ming Li, David Kotz
Design And Implementation Of A Large-Scale Context Fusion Network, Guanling Chen, Ming Li, David Kotz
Dartmouth Scholarship
In this paper we motivate a Context Fusion Network (CFN), an infrastructure model that allows context-aware applications to select distributed data sources and compose them with customized data-fusion operators into a directed acyclic information fusion graph. Such a graph represents how an application computes high-level understandings of its execution context from low-level sensory data. Multiple graphs by different applications inter-connect with each other to form a global graph. A key advantage of a CFN is re-usability, both at code-level and instance-level, facilitated by operator composition. We designed and implemented a distributed CFN system, Solar, which maps the logical operator graph …
A Sensor-Fusion Approach For Meeting Detection, Jue Wang, Guanling Chen, David Kotz
A Sensor-Fusion Approach For Meeting Detection, Jue Wang, Guanling Chen, David Kotz
Dartmouth Scholarship
In this paper we present a context-sensing component that recognizes meetings in a typical office environment. Our prototype detects the meeting start and end by combining outputs from pressure and motion sensors installed on the chairs. We developed a telephone controller application that transfers incoming calls to voice-mail when the user is in a meeting. Our experiments show that it is feasible to detect high-level context changes with “good enough” accuracy, using low-cost, off-the-shelf hardware, and simple algorithms without complex training. We also note the need for better metrics to measure context detection performance, other than just accuracy. We propose …
A Sensor Fusion Approach For Meeting Detection, Jue Wang, Guanling Chen, David Kotz
A Sensor Fusion Approach For Meeting Detection, Jue Wang, Guanling Chen, David Kotz
Dartmouth Scholarship
In this paper we present a context-sensing component that recognizes meetings in a typical office environment. Our prototype detects the meeting start and end by combining outputs from pressure and motion sensors installed on the chairs. We developed a telephone controller application that transfers incoming calls to voice-mail when the user is in a meeting. Our experiments show that it is feasible to detect high-level context changes with ``good enough'' accuracy, using low-cost, off-the-shelf hardware, and simple algorithms without complex training. We also note the need for better metrics to measure context detection performance, other than just accuracy. We propose …
Dependency Management In Distributed Settings (Poster Abstract), Guanling Chen, David Kotz
Dependency Management In Distributed Settings (Poster Abstract), Guanling Chen, David Kotz
Dartmouth Scholarship
Ubiquitous-computing environments are heterogeneous and volatile in nature. Systems that support ubicomp applications must be self-managed, to reduce human intervention. In this paper, we present a general service that helps distributed software components to manage their dependencies. Our service proactively monitors the liveness of components and recovers them according to supplied policies. Our service also tracks the state of components, on behalf of their dependents, and may automatically select components for the dependent to use based on evaluations of customized functions. We believe that our approach is flexible and abstracts away many of the complexities encountered in ubicomp environments. In …