This paper presents a novel algorithm for polygon approximation which is eecient in the sense of rate-distortion quality and computation time. Special attention is hereby given to generate polygons with a low number of nodes, which are suitable as shape signatures in image retrieval from multimedia databases.
The coliform group has been used extensively as an indicator of water quality and has historically led to the public health protection concept. The aim of this review is to examine methods currently in use or which can be proposed for the monitoring of coliforms in drinking water. Actually, the need for more rapid, sensitive and specific tests is essential… (More)