Works intended for this column should be sent direct to the Book-Review Editor, whose address appears in this issue. All reviews are also available from Crystallography Journals Online, supplemented where possible with direct links to the publisher's information. The following books have been received by the Editor. Uncritical notices are given under this heading instead of reviews in order to ...

Hybrid Knowledge Bases based on Lifschitz's logic of Minimal with Negation as Failure are a successful approach to combine the expressivity Description Logics and Logic Programming in single language. Their syntax, defined by Motik Rosati, disallows function symbols. In order define well-founded semantics for MKNF HKBs, Knorr et al. partition modal atoms occurring it, called alternating fixpoin...

Spatial analysis techniques are used in the data of ecological studies, which consider geographical areas as observation units. In this article, we propose a Bayesian bivariate spatial shared component model to mapping breast and cervical cancer mortality Southern Brazil, based on models introduced by Knorr-Held Best (2001) Held et al. (2005). Markov Chain Monte Carlo (MCMC) methods were spatia...

Using magnetic tweezers, we study in real time the condensation of single DNA molecules under tension. We find that DNA condensation occurs via discrete nucleated events. By measuring the influence of an imposed twist, we show that condensation is initiated by the formation of a plectonemic supercoil. This demonstrates a strong interplay between the condensation transition and externally impose...