Actally there are some motion sensor based reseach in this domain, e.g.: http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0035757 http://journal

Actally there are some motion sensor based reseach in this domain, e.g.: http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0035757 http://journals.plos.org/plosone/article?id=10.1371/journal....