Multiphase coexistence in polydisperse colloidal mixtures

We study the phase behavior of mixtures of monodisperse colloidal spheres with a depletion agent which can have arbitrary shape and can possess a polydisperse size or shape distribution. In the low concentration limit, considered here, we can employ the free-volume theory and take the geometry of particles of the depletion agent into account within the framework of fundamental measure theory. We apply our approach to study the phase diagram of a mixture of (monodisperse) colloidal spheres and two polydisperse polymer components. By fine tuning the distribution of the polymer it is possible to construct a complex phase diagram which exhibits two stable critical points.Comment: 10 pages, 4 figure

Algunos ejemplos de Realpolitik en las fuentes griegas

Se comentan algunos ejemplos de textos legales que muestran un enfoque decididamente realista, inspirado por un principio de racionalismo práctico y una total autonomía en la aplicación de la inteligencia humana a la previsión y resolución de los problemas de la vida en comunidad. Los testimonios analizados primero, son epigráficos: una arcaica inscripción de Quíos (VII-VI), cuya mención de una µïùìc äèíïóÝè indujo a considerarla un temprano ejemplo de constitución democrática, y los códigos legales, en forma de Imprecaciones Públicas, recogidos en dos inscripciones procedentes de Teos (490-470). Finalmente se insiste en el paralelismo de estos testimonios directos con un texto literario, la Ciropedia de Jenofonte.Using some fragments of archaic legal texts, and of Xenophon's Cyropaedia, we show the dominant role, within the Ancient Greek World, of a principle of practical rationality to deal with the problems arising from life of the human communities. A principle relying upon a full authonomy of the human mind. The fragments belong to a Chios' inscription (VII-VI), usually seen as an early remain of a democratic constitution because of its mentioning of a µïùìc äèíïóÝè, and to the law codes on two inscriptions from Teos (490-470), written in the form of public imprecations. An akin method is suggested for the political strategies shown by the literary hero of Xenophon's Cyropaedia