Technology 1: Location awareness. The first
article catalogs many approaches to determining the absolute or relative
location of an object. The second describes a workflow application tracking
location in a biotech lab, with the software issues
involved in successful implementation. GPS is not the only tracking
technology. Consider ultrasonics, or even cellphone transmissions.
Here are a presentation and an article on combining GPS
with cellphone network localization to make a system stronger than
either one alone.