I managed to take (Bluetooth GPS, mobile phone and application), combine them Perl, and create a system that automatically sends my location to the website. I can be located all the time.
Y. Ye, Y. Zheng, Y. Chen, J. Feng, и X. Xie. International Conference on Mobile Data Management: Systems, Services and Middleware (MDM), стр. 1--10. IEEE, (2009)
A. Monreale, F. Pinelli, R. Trasarti, и F. Giannotti. Proceedings of the 15th ACM SIGKDD international conference on Knowledge discovery and data mining, стр. 637-646. ACM, (2009)
F. Giannotti, M. Nanni, F. Pinelli, и D. Pedreschi. Proceedings of the 13th ACM SIGKDD international conference on Knowledge discovery and data mining, стр. 330-339. ACM, (2007)