In scheduling connections at busy web servers, it is commonly assumed that transmission duration (or time in system) is directly proportional to the size of the file transferred. For example, a scheduling discipline such as SRPT (shortest remaining processing time) could use this assumption to order connections according to the residual size of the transfer. However, with a diverse client popul...

This work was supported by ESPRIT Basic Research Action P3020 \Integration", by CICYT under grant TIC 91-0425, and by \Progetto Finalizzato Sistemi Informatici e Calcolo Parallelo of C.N.R." under grant n.9100880.PF69 Departamento de Sistemas Inform aticos y Computaci on, Universidad Polit ecnica de Valencia, Camino de Vera s/n, Apdo. 22012, 46020 Valencia, Spain. Dipartimento di Informatica, U...

Sir, We read with great interest a recent systematic review by Lee et al. published inyour journal evaluating the clinical effectivenessofpreimplantation genetic diagnosis for aneuploidy in all 24 chromosomes (PGD-A) (Lee et al., 2015). The authors conclude that, for the time being, the role for PGD-A remains uncertain regarding its clinicaland costeffectiveness. In our opinion, a number of obs...

Background Transparency in quality of care is an increasingly important issue in healthcare. In many international healthcare systems, transparency in quality is crucial for health insurers when purchasing care on behalf of their consumers, for providers to improve the quality of care (if necessary), and for consumers to choose their provider in case treatment is needed. Conscious consume...

The patient-physician relationship has many dimensions––technical, psychological, moral and legal. At its essence, however, it is a professional relationship. As in all such relationships, there exists a set of boundaries between the parties that allow each to act according to his particular role and responsibilities, in a safe environment. The existence of such boundaries implies that the noti...