We apply a statistical method to derive very precise locations for soft gamma repeaters using data from the interplanetary network. We demonstrate the validity of the method by deriving a 600 arcsec 2 error ellipse for SGR1900+14 whose center agrees with the VLA source position to better than 1 ′′. We then apply it to SGR1806-20, for which we obtain a 230 arcsec 2 error ellipse, the smallest bu...

eukocytes have a better chance of sticking to neighboring cells with the right ligands if they rotate on their way by, based on results from Dwir et al. (page 649). Flowing leukocytes are captured via L-selectin interactions with carbohydrate ligands on vessel walls and subsets of other leukocytes. L-selectin is an unusual adhesive molecule—shear stress improves its adherance to ligands, wherea...

Vivian Siegel is at the Department of Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee, USA (e-mail: [email protected]) Scholarship builds not only from published results, but also from the unpublished work, ideas, reagents and goodwill of others. We need to acknowledge this – to celebrate this – every chance we get Anyone who has done biomedical research knows th...

Do our minds extend beyond our brains? In a series of publications, Mark Rowlands has argued that the correct answer to this question is an affirmative one. According to Rowlands, certain types of operations on bodily and worldly structures should be considered to be proper and literal parts of our cognitive and mental processes. In this article, I present and critically evaluate Rowlands' posi...