This paper describes a single sign-on solution for the central management of health care provider’s smart cards in hospitals. The proposed approach which is expected to be an improvement over current methods is made possible through the introduction of a national healthcare telematics...

We study the Euclidean variant of the optimalcommunication spanning tree (OCST) problem. An experimentalanalysis reveals that edges in optimal trees do not only have lowdistance weights but also point with higher probability towardsthe graph’s center. Consequently, we use this characteristic...