This article reviews recent advances in missing data research using graphical models to represent multivariate dependencies. We first examine the limitations of traditional frameworks from three di...

Device-free context awareness is important to many applications. There are two broadly used approaches for device-free awareness, i.e., video-based and radio-based. Video-based can deliver good performance, but privacy a serious concern. Radio-based applications have drawn researchers' attention instead, because it does not violate radio signal penetrate obstacles. The existing works design exp...