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This paper describes research towards a system for locating wireless nodes in a home environment requiring merely a single access point. The only sensor reading used for the location estimation is the received signal strength indication (RSSI) as given by an RF interface, e.g., Wi-Fi. Wireless signal strength maps for the positioning filter are obtained by(More)
This series is designed to make available to a wider readership health studies prepared for use within the OECD. Authorship is usually collective, but principal writers are named. The papers are generally available only in their original language – English or French – with a summary in the other. The opinions expressed and arguments employed here are the(More)
This paper describes a probabilistic approach to global localization within an in-door environment with minimum infrastructure requirements. Global localization is a flavor of localization in which the device is unaware of its initial position and has to determine the same from scratch. Localization is performed based on the received signal strength(More)
We propose a system for improving grasping using fingertip optical proximity sensors that allows us to perform online grasp adjustments to an initial grasp point without requiring premature object contact or regrasping strategies. We present novel optical proximity sensors that fit inside the fingertips of a Barrett Hand, and demonstrate their use alongside(More)
This paper provides new techniques for abstracting the state space of a Markov Decision Process (MDP). These techniques extend one of the recent minimization models, known as-reduction, to construct a partition space that has a smaller number of states than the original MDP. As a result, learning policies on the partition space should be faster than on the(More)
This article provides an overview of current trends in health expenditures in 29 OECD countries and recent revisions of OECD health accounts. U.S. health expenditures are compared with those of other OECD countries. The interactions of cost-containment measures with changes in the public-private mix of financing and in the composition of health care(More)
2 World Health Organization, Regional Office for Europe. The findings, interpretations and conclusions expressed in this publication are entirely those of the author and should not be attributed in any manner whatsoever to the World Health Organization. Evolution of the share of population aged 65 and older and of the share of those aged 80 and older among(More)
T HE GOAL OF THIS PROJECT is to develop a unique simulation environment that can be used to increase students' in terest and expertise in Computer Science curriculum. Hands-on experience with physical or simulated equipment is an essential ingredient for learning, but many approaches to training develop a separate piece of equipment or software for each(More)
This paper addresses adaptive control architectures for systems that respond autonomously to changing tasks. Such systems often have many sensory and motor alternatives and behavior drawn from these produces varying quality solutions. The objective is then to ground behavior in control laws which, combined with resources , enumerate closed-loop behavioral(More)