A new mode of transport is described that was capable of high-resolution separation of superparamagnetic materials from complex mixtures based on their size. Laminar flow and a rotating external magnetic field were applied to superparamagnetic beads assembled on a semiperiodic micromagnet array. Beads at the edge of the micromagnet array oscillated in-phase with the external magnetic field with...

Every grouping of people develops its own culture with formal and informal rules, norms of behavior, ways of operating and sanctions against those who fail to understand or conform. An individual cannot easily replace a familiar culture or values with those of a new community—he or she is more likely to selectively adapt or modify features of a new group that seem attractive or useful.—Gilly Sa...

On February 3, 2005, the National Institutes of Health (NIH) announced its policy on “enhancing public access to archived publications resulting from NIH-funded research.” Through this policy, the NIH requests that publications resulting from NIH-funded research be deposited by the authors in an archive at the National Library of Medicine (NLM). Authors can elect to have their publications rele...