Ethernet is the most widely used network and many analytical models were developed to predict its capacity. Usually in these models assumptions like infinite population, no back-off algorithm and slotted channel are made. By comparing two models (one slotted and the other non-slotted) with reported measurements, we showed the optimistic estimate of the channel capacity of the slotted model is n...

OBJECTIVE To prospectively test the efficacy of a device for the home treatment of benign paroxysmal positional vertigo (BPPV). DESIGN Multicenter prospective cohort study. SETTING Community and tertiary care clinic offices and patient homes. PATIENTS Forty patients with active BPPV. INTERVENTIONS Training on and treatment with a home treatment device (The DizzyFIX) as their primary the...

This paper is about our experiences of space in the Equator project (www.equator.ac.uk), in particular, the way in which multiple spaces, both virtual and physical, can co-exist. By this we mean that people and objects may have locations in and relationships to both physical space and one or more virtual spaces, and that these different spaces together interact to give an overall system behavio...