Yanlei Diao Boduo Li Anna Liu Liping Peng Charles Sutton Thanh Tran 0002 Michael Zink Capturing Data Uncertainty in High-Volume Stream Processing http://arxiv.org/abs/0909.1777 2009 CoRR abs/0909.1777 db/journals/corr/corr0909.html#abs-0909-1777 informal publication