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This paper explores how online social networks and co-presence social networks complement each other to form global, fused social relations. We collected Bluetooth-based co-presence data from mobile phones and Facebook social data from a shared set of 104 students. For improved analysis accuracy, we created weighted social graphs based on meeting frequency and duration for co-presence data, and based...
Smart phones can collect and share Bluetooth co-location traces to identify ad hoc or semi-permanent social groups. This information, known to group members but otherwise unavailable, can be leveraged in applications and protocols, such as recommender systems or delay-tolerant forwarding in ad hoc networks, to enhance the user experience. Group discovery using Bluetooth co-location is practical because:(i)...
Adaptive beamforming is a preferable processing technique over its non-adaptive counterpart for obtaining audio signals in array applications due to its excellent anti-interference ability. In terms of implementation, it can be implemented either directly in time domain or in time-frequency domain. This paper compares the performance of time domain adaptive beamforming and time-frequency domain adaptive...
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