Iosif Lazaridis Qi Han Xingbo Yu Sharad Mehrotra Nalini Venkatasubramanian Dmitri V. Kalashnikov Weiwen Yang QUASAR: quality aware sensing architecture. 26-31 2004 33 SIGMOD Record 1 http://doi.acm.org/10.1145/974121.974126 db/journals/sigmod/sigmod33.html#LazaridisHYMVKY04