International Journal of Health Geographics 2007, 6:9
between the older person and a central CAALYX monitor- ing station is lost for some reason (e.g., bad network con- nection or technical fault in remote server). Future follow- on services should have enough embedded "intelligence" to be able to automatically deal with such situations and switch to a suitable alternative plan.
Other possible future directions include developing value-added geo-services for niche markets; for example, for Alzheimer's patients a geo-reminder service can be developed based on Ludimate's Geo-minder  to help with their short-term memory problems. The current ver- sion of CAALYX offers essentially the infrastructure for creating such services, and some non-mobile/non-loca- tion-based reminders, e.g., daily drug reminders at home, will be included in the pilot. But a location-based reminder to assist Alzheimer's patients could be some- thing like "When I pass supermarket, remind me to buy vege- tables". Then upon arriving at the marked location, the mobile phone can play an alarm and display a stored text note or a voice note previously associated to that location. This is far more superior to simple time-based reminders, as it also considers the location-based context.
Authors' contributions MNKB conceived and drafted the manuscript. AR, AM and MEV contributed portions of the text and Figure 1. AB, RF, IT and MB contributed portions of the text and Figure 2. All authors contributed unique insight and technical know-how in their respective areas of expertise, and revised and approved the final manuscript.
The CAALYX project (Complete Ambient Assisted Living Experiment) is funded by the Commission of the European Union as part of its Sixth Framework Programme (IST-2005-045215).
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