In this paper we study the Near-Gathering problem for a set of asynchronous, anonymous, oblivious and autonomous mobile robots with limited visibility moving in LookCompute-Move (LCM) cycles: In this problem, the robots have to get close enough to each other, so that every robot can see all the others, without touching (i.e., colliding) with any other robot. The importance of this problem might...

kinase better known for triggering DNA replication also helps create the sticky heterochromatin at centromeres of fission yeast, according to Julie Bailis, Susan Forsburg (Salk Institute, La Jolla, CA), and colleagues. The dual action makes sense, as chromosomes must be stuck together as soon as they are replicated. The responsible kinase activity, Hsk1 (CDC7)–Dfp1, is restricted to S phase, wh...

1 The first section of a three-part article on Compstat, an information-driven managerial process, examines four crime-reduction principles that form the basis of the technique. Agencies must ensure that they are prepared to handle situations involving officers in crisis. 26 Eight Supreme Court decisions of particular importance to law enforcement are summarized. Contributors' opinions and stat...

Be it directly, using DMA services, or intermediated by brokers, investors send their orders to trading platforms using execution algorithms. VWAP algorithms are widely used but they are only part of the menu proposed to investors. POV (also called PVol, for Percentage of Volume) is another instance of execution strategy, in which participation rate to the market is as close as possible to a pr...

Is membrane fusion an essentially passive or an active process? It could be that fusion proteins simply need to pin two bilayers together long enough, and the bilayers could do the rest spontaneously. Or, it could be that the fusion proteins play an active role after pinning two bilayers, exerting force in the bilayer in one or another way to direct the fusion process. To distinguish these alte...

Reflection is an important precursor to attitude and behavior change, but existing advice on designing for reflection in games mixed requires further empirical investigation. We report the design evaluation (n=32) of a game prompt student work-life balance. Participants played as themselves or third person character (Alex). An inductive qualitative analysis post-play interviews, follow-up one w...