Three-particle correlations in QCD jets and beyond

In this paper, we present a more detailed version of our previous work for three-particle correlations in quark and gluon jets [1]. We give theoretical results for this observable in the double logarithmic approximation and the modified leading logarithmic approximation. In both resummation schemes, we use the formalism of the generating functional and solve the evolution equations analytically from the steepest descent evaluation of the one-particle distribution. In addition, in this paper we include predictions beyond the limiting spectrum approximation and study this observable near the hump of the single inclusive distribution. We thus provide a further test of the local parton hadron duality (LPHD) and make predictions for the LHC. The computation of higher rank correlators is presented in the double logarithmic approximation and shown to be rather cumbersome.Comment: 34 pages and 14 figure

Teaching students about chemical elements using daily-life contexts

Learning the names and symbols for chemical elements is a task that students often find dull, although it is of crucial importance for understanding chemistry. In this respect, the use of games or similar play activities could make the learning experience more enjoyable. This paper presents the results of a study in which two tasks involving play (TIPs) and based on daily-life contexts (football and the home) were used to teach the names and symbols of chemical elements. The experimental group comprised 38 year-10 students who studied this topic through a teaching unit built around the TIPs. A control group of 67 year-10 students followed a traditional teaching approach to the same topic. The effectiveness of the TIPs was assessed using three items, administered pre- and post-test, that explored students’ knowledge about metallic and non-metallic elements and their ability to identify them in their everyday environment. Following the TIP-based teaching unit, students in the experimental group gave a higher percentage of appropriate answers, with the Wilcoxon test indicating significant post-test differences for all three items. However, the Kolgomorov-Smirnov test indicated that the experimental and control groups only differed significantly at post-test in their ability to give the names and symbols of non-metals, with the experimental group performing better. Memorising the names and symbols of chemical elements is a complex task for students, and identifying their presence in everyday environments appears to be particularly difficult. However, the results suggest that the use of TIPs linked to daily-life contexts could help students with their learning of this topic.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech. Proyecto ‘I+D Excelencia’ EDU2013-41952-

Partidos políticos: vida interna y desarrollo electoral en el Estado de México (1993-2006)

El propósito principal del presente artículo es analizar la adaptación de los partidos políticos en el contexto mexiquense entre los años 1993-2006. Los partidos políticos como organizaciones responden a intereses complejos, mismos que se expresan también de forma polifacética. En los últimos años estos organismos políticos se han adaptado al mercado, abandonado la ideología e introducido a la competencia electoral, lo cual lleva a sus líderes a tomar decisiones en un contexto de elección racional. La tipología a la que responden ahora es a la de partido profesional, catch-all o cartel, dejando atrás la respuesta a los cleavages sociales o a la ideología que otrora identificaba a los partidos.El propósito principal del presente artículo es analizar la adaptación de los partidos políticos en el contexto mexiquense entre los años 1993-2006. Los partidos políticos como organizaciones responden a intereses complejos, mismos que se expresan también de forma polifacética. En los últimos años estos organismos políticos se han adaptado al mercado, abandonado la ideología e introducido a la competencia electoral, lo cual lleva a sus líderes a tomar decisiones en un contexto de elección racional. La tipología a la que responden ahora es a la de partido profesional, catch-all o cartel, dejando atrás la respuesta a los cleavages sociales o a la ideología que otrora identificaba a los partidos

Uso metodológico de las tablas de contingencia en la ciencia política

Este trabajo presenta la importancia que tienen las tablas de contingencia como herramienta metodológica en la construcción de la Ciencia Política. Se expone que a partir de una tabla de contingencia se puede explorar relaciones que apoyen la explicación de una relación entre variables de estudio o de investigación. Se ofrecen algunos ejemplos que ilustran el uso de la tabla para arrancar de ahí una explicación que se apoye en la teoría. Asimismo se hace un repaso rápido a los coeficientes de asociación que se basan en la tabla de contingencia.Este trabajo presenta la importancia que tienen las tablas de contingencia como herramienta metodológica en la construcción de la Ciencia Política. Se expone que a partir de una tabla de contingencia se puede explorar relaciones que apoyen la explicación de una relación entre variables de estudio o de investigación. Se ofrecen algunos ejemplos que ilustran el uso de la tabla para arrancar de ahí una explicación que se apoye en la teoría. Asimismo se hace un repaso rápido a los coeficientes de asociación que se basan en la tabla de contingencia

Electrical vestibular stimulation in humans. A narrative review

Background: In patients with bilateral vestibulopathy, the regular treatment options, such as medication, surgery, and/ or vestibular rehabilitation, do not always suffice. Therefore, the focus in this field of vestibular research shifted to electri- cal vestibular stimulation (EVS) and the development of a system capable of artificially restoring the vestibular func- tion. Key Message: Currently, three approaches are being investigated: vestibular co-stimulation with a cochlear im- plant (CI), EVS with a vestibular implant (VI), and galvanic vestibular stimulation (GVS). All three applications show promising results but due to conceptual differences and the experimental state, a consensus on which application is the most ideal for which type of patient is still missing. Summa- ry: Vestibular co-stimulation with a CI is based on “spread of excitation,” which is a phenomenon that occurs when the currents from the CI spread to the surrounding structures and stimulate them. It has been shown that CI activation can indeed result in stimulation of the vestibular structures. Therefore, the question was raised whether vestibular co- stimulation can be functionally used in patients with bilat- eral vestibulopathy. A more direct vestibular stimulation method can be accomplished by implantation and activa- tion of a VI. The concept of the VI is based on the technology and principles of the CI. Different VI prototypes are currently being evaluated regarding feasibility and functionality. So far, all of them were capable of activating different types of vestibular reflexes. A third stimulation method is GVS, which requires the use of surface electrodes instead of an implant- ed electrode array. However, as the currents are sent through the skull from one mastoid to the other, GVS is rather unspe- cific. It should be mentioned though, that the reported spread of excitation in both CI and VI use also seems to in- duce a more unspecific stimulation. Although all three ap- plications of EVS were shown to be effective, it has yet to be defined which option is more desirable based on applicabil- ity and efficiency. It is possible and even likely that there is a place for all three approaches, given the diversity of the pa- tient population who serves to gain from such technologies

Profesionalización y cartelización de los partidos políticos: el caso de México

Los partidos políticos en México se han transformado en organizaciones profesionales electorales que les permite el acceso al poder y se convierten en partido cártel, compartiendo entre partidos la toma de decisiones, el gobierno, el presupuesto público que sirve para sus actividades ordinarias, pago de personal e incluso para la promoción de sus campañas, y no existiendo oposición sino todos los partidos forman parte del gobierno, encuentran lugar en alguna esfera de los diversos ámbitos federal, estatal o municipal