Discussions that work : task-centred fluency practice.

Este recurso trata de un aspecto particular de la enseñanza del inglés como lengua extranjera: la práctica de la fluidez . Sugiere algunas formas en que los estudiantes pueden ser inducidos a hablar en el aula, utilizando el lenguaje de forma creativa, a propósito, y de forma individual. El vehículo de esa utilización se define, en un sentido muy amplio de la palabra, como la discusión. La primera parte del recurso trata acerca de una serie de elementos que son esenciales para una buena discusión: algunos de ellos son bien conocidos: temas interesantes, trabajo en grupo, juego de roles, mientras que otros han sido relativamente descuidados: la como enfocar la tarea, el proceso de la organización. La segunda parte consta de unos cincuenta ejemplos prácticos que van desde lo más sencillo a lo complejo y, por lo tanto, se pueden usar con una amplia gama de estudiantes, desde la enseñanza elemental hasta la enseñanza secundaria y de adultos.

A new all-round density functional based on spin states and SN2 barriers

We report here a new empirical density functional that is constructed based on the performance of OPBE and PBE for spin states and SN 2 reaction barriers and how these are affected by different regions of the reduced gradient expansion. In a previous study [Swart, Sol̀, and Bickelhaupt, J. Comput. Methods Sci. Eng. 9, 69 (2009)] we already reported how, by switching between OPBE and PBE, one could obtain both the good performance of OPBE for spin states and reaction barriers and that of PBE for weak interactions within one and the same (SSB-sw) functional. Here we fine tuned this functional and include a portion of the KT functional and Grimme's dispersion correction to account for π- π stacking. Our new SSB-D functional is found to be a clear improvement and functions very well for biological applications (hydrogen bonding, π -π stacking, spin-state splittings, accuracy of geometries, reaction barriers)

Endgame table testing of studies - 1

The van der Heijden Studies Database has been reviewed to identify 'Draw Studies' with sub-7-man positions in the main line which are not draws. The data-mining method is described. Some 1,500 studies were faulted, 700 for the first time: 14 of the more interesting faults are highlighted and discussed.

Endgame table testing of studies - II

The van der Heijden Studies Database (Version III) has been reviewed to identify 'Win Studies' with sub-7-man positions in the main line which are not wins for White. Some studies were faulted, A number for the first time: 21 of the more interesting escapes by Black are highlighted, themed and discussed.

Developments in the Doha Round and WTO dispute settlement: some implications for EU agricultural policy

Progress in the Doha Round is assessed against the changes to the common agricultural policy (CAP) brought about by the Fischler reforms of 2003-2004, and that proposed for sugar. An elimination of export subsidies could place EU exports of processed foods at a competitive disadvantage because of high sugar and milk prices. Provided the single payment scheme falls within the green box, the likely new limits on domestic support should not be problematic for the post-Fischler CAP. However, an ambitious market access package could open up EU markets and bring pressure for further reform. If there is no Doha agreement, existing provisions will continue to apply, but without the protection of the Peace Clause; and increased litigation is likely. Further CAP reform is to be expected.

The periodic table: Molybdenum

Chemical & Engineering News celebrates the Periodic Table of the Elements on the magazine's 80th anniversary.