Attentional repulsion is described as the perceived displacement of a vernier stimulus in a direction that is opposite to a brief peripheral visual cue (Suzuki & Cavanagh, 1997). Here, we demonstrate that visual repulsion can also be elicited using lateralized sounds. Given that repulsion is believed to be occurring in early retinotopic visual areas, these results raise the possibility that the...

For many, analysis of a microarray experiment starts with a spreadsheet of expression levels. While great attention is duly paid to RNA extraction, preparation and hybridization, relatively little care is devoted to extraction of expression levels from the fluorescent image. By delegating this step to a click of the mouse the exact extraction process is masked and researchers may be unwittingly...

It is one of the salient features of an intuitionistic philosophy of mathematics that it denies the possibility that there may be infinite coincidences in mathematics: if a sentence is true, it can only be because there is a finitely expressible reason for it. The same view was expressed from a different standpoint by Hilbert in 1924 when he asserted that in mathematics there is ignorabimus. It...

Let f : X → Y be a Cohen-Macaulay map of finite type between Noetherian schemes, and g : Y ′ → Y a base change map, with Y ′ Noetherian. Let f ′ : X → Y ′ be the base change of f under g and g : X → X the base change of g under f . We show that there is a canonical isomorphism θ g : g ∗ ωf ≃ ωf ′ , where ωf and ωf ′ are the relative dualizing sheaves. The map θ g f is easily described when f is...