@conference {FNF11a, title = {Passive vs. Active Measurement: the Role of Smart Sensors}, booktitle = {Third International Workshop on Pervasive Computing in Embedded Systems}, year = {2011}, pages = {333-337}, author = {M. Kasza and V. Sz{\H u}cs and {\'A}. Z. V{\'e}gh and T. T{\"o}r{\"o}k} }