The NIST compilation of ionization potentials revisited (I): From He-like to Xe-like ions

The National Institute of Standards and Technology (NIST) database on ionization potentials for neutral atoms and ions is examined. For each isoelectronic sequence, we construct a regularized perturbative series that exactly matches the large-$Z$ and $Z\approx N-1$ regions. Comparison of the NIST data with this series allows the identification of problematic values in the reported data.Comment: 19 pages, 43 figure

Predicting signatures of anisotropic resonance energy transfer in dye-functionalized nanoparticles

Resonance energy transfer (RET) is an inherently anisotropic process. Even the simplest, well-known F\"orster theory, based on the transition dipole-dipole coupling, implicitly incorporates the anisotropic character of RET. In this theoretical work, we study possible signatures of the fundamental anisotropic character of RET in hybrid nanomaterials composed of a semiconductor nanoparticle (NP) decorated with molecular dyes. In particular, by means of a realistic kinetic model, we show that the analysis of the dye photoluminescence difference for orthogonal input polarizations reveals the anisotropic character of the dye-NP RET which arises from the intrinsic anisotropy of the NP lattice. In a prototypical core/shell wurtzite CdSe/ZnS NP functionalized with cyanine dyes (Cy3B), this difference is predicted to be as large as 75\% and it is strongly dependent in amplitude and sign on the dye-NP distance. We account for all the possible RET processes within the system, together with competing decay pathways in the separate segments. In addition, we show that the anisotropic signature of RET is persistent up to a large number of dyes per NP.Comment: 9 pages, 5 figures. Supplementary information available at http://pubs.rsc.org/en/content/articlelanding/2016/ra/c6ra22433d/unauth#!divAbstrac

La palabra y la nada (Rubén Darío y Lezama Lima).

Sin resume

Activation of effector immune cells promotes tumor stochastic extinction: A homotopy analysis approach

In this article we provide homotopy solutions of a cancer nonlinear model describing the dynamics of tumor cells in interaction with healthy and effector immune cells. We apply a semi-analytic technique for solving strongly nonlinear systems - the Step Homotopy Analysis Method (SHAM). This algorithm, based on a modification of the standard homotopy analysis method (HAM), allows to obtain a one-parameter family of explicit series solutions. By using the homotopy solutions, we first investigate the dynamical effect of the activation of the effector immune cells in the deterministic dynamics, showing that an increased activation makes the system to enter into chaotic dynamics via a period-doubling bifurcation scenario. Then, by adding demographic stochasticity into the homotopy solutions, we show, as a difference from the deterministic dynamics, that an increased activation of the immune cells facilitates cancer clearance involving tumor cells extinction and healthy cells persistence. Our results highlight the importance of therapies activating the effector immune cells at early stages of cancer progression

The railway heritage in Mexico and its role in the configuration of industrial and cultural landscapes

The construction of the railways in Mexico was an event of national importance, not only for its role in the economic history, but for their contribution in shaping cultural landscapes of industrial character. The railway system made many cultural exchanges possible in various regions, setting an important natural, social and cultural environment. In recent years most of the vast industrial railway heritage has become obsolete and unused, and has suffered rapid and alarming deterioration. Jalisco is located in the west of the country and has the largest lake in Mexico. Two trunk railway lines and many branches communicating the haciendas and towns passed through the region. Some of these routes have been abandoned. The projects, “Vía verde del Mariachi” and “Vía verde de Chapala” seek to recognize the importance of the cultural industrial landscapes created by the railroad in this part of México. Aims to recover the memory of the railway routes and the design of a network of more than 200 kilometers of non motorized routes along 11 municipalities have included projects to rescue and conserve the tangible and intangible heritage of these regions. These constitute integral conservation projects focused on recognizing the value of the natural, cultural and industrial landscapes linked to the railway history in Mexico.ITESO, A.C

Editorial: In Memoriam Julio Hurtado Llopis (1960-2014)

Editorial: In Memoriam Julio Hurtado Llopis (1960-2014

Changes in the juvenile fish assemblage of a Mediterranean shallow Posidonia oceanica seagrass nursery area after half a century

The within-year dynamics of the juvenile fish community in a shallow seagrass-dominated nursery habitat (Posidonia oceanica) in a Mediterranean bay were compared between two surveys separated by 50 years (1960 and 2012-2013). A nocturnal survey over depths ranging from 2 to 10 m over patchy seagrass meadows was conducted for one year (2012-2013) through 72 epibenthic tows spread fortnightly in 4 nearby stations, mimicking a survey conducted in 1960 in terms of sampling intensity, sampling zone, temporal coverage and sampling gear. Although a large proportion of the fish species were similar among surveys, remarkable and statistically significant differences were detected. A striking feature was that one of the most common and abundant Sparidae species currently, Diplodus annularis, did not appear in 1960. Other strong differences included the nonappearance of the European eel Anguilla anguilla in the recent survey. Furthermore, one of the most valuable species for artisanal fisheries in the area, the black scorpionfish Scorpaena porcus, was almost 10 times less abundant in 1960. A finer-scale study of the 2012-2013 survey allowed a quantitative analysis between species composition and potential environmental drivers through redundancy analysis that well described the current pattern of time-dependent recruitment pulses in nearshore meadows of the area throughout the year, with marked effects of surface temperature and photoperiod. The comparison between surveys suggests that some major differences between surveys are not likely to be attributable to interannual stochasticity in recruitment or environmental variability but may be related to i) unaccounted-for habitat transformation and/or ii) the strong decrease in juvenile fishing mortality in this shallow nursery area since the enforcement of bans on littoral epibenthic trawling activities characteristic of this area

Monitoria na área de Teoria e percepção musical básica

VII Seminário de Extensão Universitária da UNILA (SEUNI); VIII Encontro de Iniciação Científica e IV Encontro de Iniciação em Desenvolvimento Tecnológico e Inovação (EICTI 2019) e Seminário de Atividades Formativas da UNILA (SAFOR)O presente trabalho visa apresentar aspectos do projeto de monitoria na área de teoria e percepção musical básica que tem como objetivo oferecer meios de recuperação continuada para os alunos das disciplinas Estruturação Musical Básica, Percepção e Apreciação Musical I, Percepção e Apreciação Musical II e Harmonia e Contraponto I através de atividades de monitoria supervisionad

Evaluación del aprendizaje de la asignatura “Ingeniería de Control” en las titulaciones de Informática en el sistema europeo de créditos

Comunicación presentada en las IV Jornadas de Redes de Investigación en Docencia Universitaria, 5-6 junio 2006, AlicanteEn este artículo se presenta un estudio sobre la adaptación de la asignatura de “Ingeniería de Control” de las Ingenierías en Informática de la Universidad de Alicante al nuevo espacio europeo de educación superior y créditos ECTS. Asimismo, en este trabajo se ha realizado un estudio sobre el método de evaluación aplicado en la asignatura y la valoración del aprendizaje de la asignatura