Unusual behaviour involving mourning cloak butterflies

An unusual complication of mourning.

The emotional trauma of bereavement can, on occasion, be translated into physical trauma. Phrases such as "grinding of teeth", "breast-beating" and "tearing one's hair out" have a traditional association with mourning and lamentation.' We report a case where bereavement led directly to an uncommon neurological complication of blunt trauma. A forty year old housewife from the United Arab Emirate...

Grain boundaries and coincidence site lattices in the corneal nanonipple structure of the Mourning Cloak butterfly

In this study the highly ordered corneal nanonipple structure observed on the Mourning Cloak butterfly (Nymphalis antiopa) is analyzed with a particular emphasis on the high-angle grain-boundary-like defects that are observed between individual nanonipple crystals. It is shown that these grain boundaries are generated by rows of topological coordination defects, which create very specific misor...

Cloak/anti-cloak interactions.

Coordinate-transformation cloaking is based on the design of a metamaterial shell made of an anisotropic, spatially inhomogeneous "transformation medium" that allows rerouting the impinging wave around a given region of space. In its original version, it is generally believed that, in the ideal limit, the radiation cannot penetrate the cloaking shell (from outside to inside, and viceversa). How...

Dispersal Behaviour of Individuals in Metapopulations of Two British Butterflies

Investigating Shill Bidding Behaviour Involving Colluding Bidders

Shill bidding is where spurious bids are introduced into an auction to drive up the final price for the seller, thereby defrauding legitimate bidders. Trevathan and Read presented an algorithm to detect the presence of shill bidding in online auctions. The algorithm observes bidding patterns over a series of auctions, and gives each bidder a shill score to indicate the likelihood that they are ...