Susanna Pirttikangas Kaori Fujinami Simo Hosio Experiences on Data Collection Tools for Wearable and Ubiquitous Computing. 149-152 2008 SAINT http://doi.ieeecomputersociety.org/10.1109/SAINT.2008.59 conf/saint/2008 db/conf/saint/saint2008.html#PirttikangasFH08