We investigate "Posner molecules", calcium phosphate clusters with chemical formula Ca9(PO4)6. Originally identified in hydroxyapatite, Posner molecules have also been observed as free-floating molecules in vitro. The formation and aggregation of Posner molecules have important implications for bone growth, and may also play a role in other biological processes such as the modulation of calcium...

The landmark experiments by Posner in the late 1970s have shown that reaction time (RT) is faster when the stimulus appears in an expected location, as indicated by a cue; since then, the so-called Posner task has been considered a "gold standard" test of spatial attention. It is thus fundamental to understand the neural mechanisms involved in performing it. To this end, we have developed a Bay...

The possibility that quantum processing with nuclear spins might be operative in the brain is explored. Phosphorus is identified as the unique biological element with a nuclear spin that can serve as a qubit for such putative quantum processing – a neural qubit – while the phosphate ion is the only possible qubit-transporter. We identify the ‘‘Posner molecule’’, Ca9(PO4)6, as the unique molecul...

Posner`s (2010) analysis offers many exciting insights into the principal-agent problem, particularly with respect to the secret service. I argue that it would be useful to consider a broader model of human behaviour, which includes awards as extrinsic incentives beyond pay, as well as intrinsic motivation. A more comparative stance that goes beyond the United States would be a useful check of ...

I recall hearing when I first came to the University of Chicago in 1969 the expression “Nirvana Fallacy,” used to describe the belief then dominant in the economics profession that market failures could and should be rectified by government intervention, assumed to be apolitical and effectively costless. The belief was unsound; government failure is commonplace, partly because of politics, part...