Concealed by veils

Graphene veils and sandwiches.

We report a new and highly versatile approach to artificial layered materials synthesis which borrows concepts of molecular beam epitaxy, self-assembly, and graphite intercalation compounds. It readily yields stacks of graphene (or other two-dimensional sheets) separated by virtually any kind of "guest" species. The new material can be "sandwich like", for which the guest species are relatively...

The Seven Veils of Privacy

P rivacy is very important. Whatever it is. The debate on privacy is notable for the lack of agreement — what is it for, is it a good or a bad thing, a right or a preference? As philosopher Judith Jarvis Thomson put it, “Perhaps the most striking thing about the right to privacy is that nobody seems to have any clear idea of what it is.”1 In a classic legal paper, William Prosser dismissed it a...

Imaging Posture Veils Neural Signals

Whereas modern brain imaging often demands holding body positions incongruent with everyday life, posture governs both neural activity and cognitive performance. Humans commonly perform while upright; yet, many neuroimaging methodologies require participants to remain motionless and adhere to non-ecological comportments within a confined space. This inconsistency between ecological postures and...

Congenital Vascular Veils in the Vitreous.

Online Concealed Correlation by Boundedly Rational Players

In a repeated game with perfect monitoring, correlation among a group of players may evolve in the common course of play (online correlation). Bounds on the complexity of the strategies that players use may enable a group of players to conceal such a correlation from their opponent. The feasibility of such “online concealed correlation” is quantified by the individually rational payoff of the o...