idea: accelerometer daemon

Minh Ha Duong haduong at
Mon Nov 10 17:52:24 CET 2008

Hi Paul,

  Here is an interesting reference for you on recognizing contexts from mobile 
phone data (can send you the PDF as PM upon request):

Modular Bayesian Network for Uncertainty Handling on Mobile Device

Keum-Sung Hwang, Sung-Bae Cho.

Mobile devices can now handle a great deal of information thanks to the 
convergence of diverse functionalities. Mobile environments have already 
shown great potential in terms of providing customized services to users 
because they can record meaningful and private information continually for 
long periods of time. Most of this information has been generally ignored 
because of the limitations of mobile devices and the uncertainty of mobile 
environments in real world. In this paper, we propose an approach based on 
modular Bayesian networks to overcome these problems and to analyze various 
kinds of log data. The method adopts a probabilistic approach to manage the 
uncertainty and decomposes the probabilistic model automatically to decrease 
complexity and how to infer the model, which is called cooperative reasoning. 
In the experimental results, the proposed methods were evaluated with mobile 
log data collected in the real world.

Minh HA DUONG, Chargé de Recherche, CNRS
CIRED, Centre International de Recherches sur l'Environnement et le 

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