Wall thickness dependence of the scaling law for ferroic stripe domains

The periodicity of 180 degrees. stripe domains as a function of crystal thickness scales with the width of the domain walls, both for ferroelectric and for ferromagnetic materials. Here we derive an analytical expression for the generalized ferroic scaling factor and use this to calculate the domain wall thickness and gradient coefficients ( exchange constants) in some ferroelectric and ferromagnetic materials. We then use these to discuss some of the wider implications for the physics of ferroelectric nanodevices and periodically poled photonic crystals.

DRAKULA HALÁLA (1921): The Cinema's First Dracula.

This essay covers the history of Károly Lajthay’s Hungarian film Drakula halála (1921), the cinema’s first adaptation of Bram Stoker’s novel Dracula. The essay attempts to construct a production history of the film, as well as to create an accurate list of cast members and key filming locations. As Drakula halála is lost, the essay also features the very first English translation of an extremely rare 1924 Hungarian novella based on the film, which offers much insight into its narrative.

On Testing the 'Moral Law'

In a previous article in this journal, Daniel Kelly, Steven Stich, Kevin Haley, Serena Eng and Dan Fessler report data that, according to them, foster scepticism about an association between harm and morality existent in the Turiel tradition (Kelly et al., 2007). This article challenges their interpretation of the data. It does so by explicating some methodological problems in the Turiel tradition that Kelly et al. themselves in a way inherit and by drawing on new evidence coming from a partial replication of their research.