Philippe Bootz and Sandy Baldwin, Regards Croisés

Philippe Merle

This paper deals with system support for the design of CSCW environments. Our model introduces objects spaces shared by cooperating participants and cooperation spaces which group participants involved in a particular cooperation together. Objects spaces are only accessed via cooperation spaces. This makes our model strongly cooperation oriented. The Group notion structures our system, called O...

Philippe BAPTISTE

Air-traffic management (ATM) consists of a predictive component (traffic planning) and an adaptive component (traffic control). The aim of the predictive component is to balance airspace demand with available capacity. The adaptive component has to guide aircraft safely to their destinations, once they are in the air. Uncertainties (e.g delay from connecting flights, technical failure) create t...

Richard Baldwin

Analytic Urns Philippe Flajolet

The talk1 describes an analytic approach to urn models of the Pólya type where an urn may contain balls of either of two colours. At each step, a ball is randomly drawn and replaced by balls of the two colours; a fixed 2× 2-matrix with constant row sum determines the replacement policy. The treatment starts from a partial differential equation associated with the model and bases itself on confo...

In Response : Philippe Gautret

In Response: Regarding the comments by Berry et al. (1) on our previously published letter, we acknowledge that, in strict parasitological terms, confirmation of the diagnosis of urogenital schistosomiasis requires the identification of eggs by microscopic examination of urine. Nevertheless, we aimed at an operational case definition, providing criteria for identifying cases most likely to be t...