Universality classes in nonequilibrium lattice systems

This work is designed to overview our present knowledge about universality classes occurring in nonequilibrium systems defined on regular lattices. In the first section I summarize the most important critical exponents, relations and the field theoretical formalism used in the text. In the second section I briefly address the question of scaling behavior at first order phase transitions. In section three I review dynamical extensions of basic static classes, show the effect of mixing dynamics and the percolation behavior. The main body of this work is given in section four where genuine, dynamical universality classes specific to nonequilibrium systems are introduced. In section five I continue overviewing such nonequilibrium classes but in coupled, multi-component systems. Most of the known nonequilibrium transition classes are explored in low dimensions between active and absorbing states of reaction-diffusion type of systems. However by mapping they can be related to universal behavior of interface growth models, which I overview in section six. Finally in section seven I summarize families of absorbing state system classes, mean-field classes and give an outlook for further directions of research.Comment: Updated comprehensive review, 62 pages (two column), 29 figs included. Scheduled for publication in Reviews of Modern Physics in April 200

Quimioembolización selectiva con adriamicina-Urografin-Lipiodol, en el tratamiento del hepatocarcinoma

Various methods of regional chemotherapy have been used in patients with non resectable heptic carcinoma. We report our preliminary experience with embolization using adriamycin-urographin-lipiodol in 2 patients with this cancer in whom a considerable reduction of tumoral mass was observed. The pertinent literature is briefly commented

Multiterminal conductance at the surface of aWeyl semimetal

Weyl semimetals are a new paradigmatic topological phase of matter featuring a gapless spectrum. One of its most distinctive features is the presence of Fermi arc surface states. Here, we report on atomistic simulations of the dc conductance and quantum Hall response of a minimalWeyl semimetal. By using scattering theory we show that a quantized Hall conductance with a nonvanishing longitudinal conductance emerges associated to the Fermi arc surface states with a remarkable robustness to high concentrations of defects in the system. Additionally, we predict that a slab of a Weyl semimetal with broken time-reversal symmetry bears persistent currents fully determined by the system size and the lattice parameters.Program "Instalacion Academica" of the Faculty of Physical and Mathematical Sciences of the University of Chile Fondecyt 1150072 1170917 Financiamiento Basal para Centros Cientificos y Tecnologicos de Excelencia FB 080