Load balancing is a critical issue for the efficient operation of peer-to-peer networks. We give new protocols for several scenarios, whose provable performance guarantees are within a constant factor of optimal. First, we give an improved version of consistent hashing, a scheme used for item to node assignments in the Chord system. In its original form, it required every network node to operat...

Special relativity is most naturally formulated as a theory of spacetime geometry, but within the spacetime framework probability appears to be a purely epistemic notion. It is possible that progress can be made with rather di¤erent approaches covariant stochastic equations, in particular but the results to date are not encouraging. However, it seems a non-epistemic notion of probability can be...

You are a busy family physician with a practice that includes obstetrics and teaching medical students. Cervical examinations are a routine part of your on-call duties. You have medical trainees with you, and they have often struggled with the cervical examination. One night on call, your trainee admits a patient in active labour and reports the cervical dilation to be 7 cm. However, she is unc...