The Coulomb-Higgs transition of the three-parameter U(1)-Higgs model

We find a first order Coulomb--Higgs phase transition at moderately large values of the coupling $\lambda$, and no evidence for a change of order at any finite value of it.Comment: 3 pages, uuencoded compressed ps file. Contribution to Lattice '9

MICROWAVE-INDUCED BISMUTH TRIIODIDE-CATALYZED FACILE SYNTHESIS OF OCTAHYDROXANTHENES

Microwave-induced reaction of 1,3-cyclohexanedione with numerous aldehydes using bismuth iodide is performed successfully toward the synthesis of important octahydroxanthenes. A most probable mechanism is suggested to explain the formation of products

Phenotipic integration does not constrain phenotypic plasticity: differential plasticity of traits is associated to their integration across environments

ResearchUnderstanding constraints to phenotypic plasticity is key given its role on the response of organisms to environmental change. It has been suggested that phenotypic integration, the structure of trait covariation, could limit trait plasticity. However, the relationship between plasticity and integration is far from resolved. Using a database of functional plasticity to drought of a Mediterranean shrub that included 20 ecophysiological traits, we assessed environmentally-induced changes in phenotypic integration and whether integration constrained the expression of plasticity, accounting for the within-environment phenotypic variation of traits. Furthermore, we provide the first test of the association between differential trait plasticity and trait integration across an optimum and a stressful environment. Phenotypic plasticity was positively associated with phenotypic integration in both environments, but this relationship was lost when phenotypic variation was considered. The similarity in the plastic response of two traits predicted their integration across environments, with integrated traits having more similar plasticity. Such variation in the plasticity of traits partly explained the lower phenotypic integration found in the stressful environment. We found no evidence that integration may constitute an internal constraint to plasticity. Rather, we present the first empirical demonstration that differences in plastic responses may involve a major reorganization of the relationships among traits, and challenge the notion that stress generally induces a tighter phenotypeinfo:eu-repo/semantics/publishedVersio

Recommendations from the Association for European Paediatric Cardiology for training in paediatric cardiac intensive care: AEPC's recommendations for European paediatric cardiology trainees The Working Group on Paediatric Cardiac Intensive Care

The following document provides a summary of the guidelines and recommendations for paediatric cardiac intensive care training as a requirement for recognition as a European paediatric cardiologist. It is therefore primarily targeting paediatric cardiology trainees in Europe, including those doctors who might wish to become experts in cardiac intensive care. These recommendations represent a frame for consistency, will evolve, and may be adapted to specific institutional requirements. They will be complemented by a learning module to be provided by our Association in the near futur

Large electric-field induced strain in BiFeO3 ceramics

Large bipolar strain of up to 0.36% (peak-to-peak value) was measured in BiFeO3 ceramics at low frequency (0.1 Hz) and large amplitude (140 kV/cm) of the driving field. This strain is comparable to that achievable in highly efficient Pb-based perovskite ceramics, such as Pb(Zr,Ti)O3 and Pb(Mg,Nb)O3-PbTiO3. The strain showed a strong dependence on the field frequency and is likely largely associated with domain switching involving predominantly non-180{\deg} domain walls. In addition, rearrangement of charged defects by applying electric field of low frequency depins these domain walls, resulting in a more efficient switching and, consequently, an increased response

Magnetómetro Kerr: análisis de ruido e instrumentación

El magnetómetro Kerr ha mostrado ser una de las herramientas más ágiles y eficaces para el estudio y la caracterización de materiales magnéticos (películas delgadas). En este artículo se describen los tipos de ruido inherentes a l montaje de ésta herramienta y la forma como pueden ser minimizados: así mismo, se realiza un análisis descriptivo de diferentes tipos de montajes prácticos. El criterio de diseño empleado para la instrumentación de este montaje se basa en las técnicas de eliminación de ruido utilizadas. Como aspecto central se presenta la reducción de ruido por wave/els. Para poder llegar a proponer una nueva alternativa de instrumentación y control más versátil y económica. Por último, se realiza un análisis comparativo en relación con otras técnicas de caracterización de materia les magnéticos