Ian Anderson Julie Maitland Scott Sherwood Louise Barkhuus Matthew Chalmers Malcolm Hall Barry Brown Henk L. Muller Shakra: Tracking and Sharing Daily Activity Levels with Unaugmented Mobile Phones. 185-199 2007 12 MONET 2-3 http://dx.doi.org/10.1007/s11036-007-0011-7 db/journals/monet/monet12.html#AndersonMSBCHBM07