Demografía cualitativa y coyuntura agraria. Análisis de interdependencias a partir del ejemplo gallego de Salnes (1600-1700)

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Portable low profile antenna at X-band

An antenna which has been conceived as a portable system for satellite communications based on the recommendations ITU-R S.580-6 and ITU-R S.465-5 for small antennas, i.e., with a diameter lower than 50 wavelengths, is introduced. It is a planar and a compact structure with a size of 40×40×2 cm. The antenna is formed by an array of 256 printed elements covering a large bandwidth (14.7%) at X-Band with a VSWR of 1.4:1. The specification includes transmission (Tx) and reception (Rx) bands simultaneously. The printed antenna has a radiation pattern with a 3dB beamwidth of 5°, over a 31dBi gain, and a dual and an interchangeable circular polarization

¿“Natural” y “Euclidiana”? Reflexiones sobre la geometría práctica y sus raíces cognitivas

We discuss critically some recent theses about geometric cognition, namely claims of universality made by Dehaene et al., and the idea of a “natural geometry” employed by Spelke et al. We offer arguments for the need to distinguish visuo-spatial cognition from basic geometric knowledge, furthermore we claim that the latter cannot be identified with Euclidean geometry. The main aim of the paper is to advance toward a characterization of basic, practical geometry – which in our view requires a combination of experiments on visuo-spatial cognition with studies in cognitive archaeology and comparative history. Examples from these fields are given, with special emphasis on the comparison of ancient Chinese and ancient Greek geometric ideas and procedures

Modular Planar Antenna at X-band for satellite communications

An antenna which has been conceived as a portable system for satellite communications based on the recommendations ITU-R S.580-6 [1] and ITU-R S.465-5 [2] for small antennas, i.e., with a diameter lower than 50 wavelengths, is introduced. It is a planar and a compact structure with a size of 40×40×2 cm. The antenna is formed by an array of 256 printed elements covering a large bandwidth (14.7%) at X-Band. The specification includes transmission (Tx) and reception (Rx) bands simultaneously. The printed antenna has a radiation pattern with a 3dB beamwidth of 5°, over a 31dBi gain, and a dual and an interchangeable circular polarizatio

Skinner’s view on hallucinations. Validity and revision

This work outlines the vision that B.F. Skinner held on hallucinations as psychological phenomena, and defends its validity and relevance nowadays. Our thesis starts with the Skinner’s conception on the behaviors of perceiving, imagining and dreaming. It is highlighted that, in Skinner’s point of view, the differences between perception on one hand and imagination or dreaming in the other, focus on what kind of variables control the behavior in question. Thus, the perceptive behavior would be controlled primarily by stimulus surrounding the person, while the imagination or dreaming would be by variables that are “under the skin” of the subject and, therefore, are private and directly inaccessible to the verbal community. On this basis, Skinner comes to an understanding of hallucinations as perceptual behaviors that occur in the absence of a perceived stimulus, similar to the behavior of imagining or dreaming, but, when hallucinating, the person, for various reasons, does not recognize his / her behaviour as controlled mainly by private stimulation. Finally we made some critical remarks regardingthe lack in Skinner’s psychology of a radical theory on the human person

Terapia de Aceptación y Compromiso aplicada a la esquizofrenia. Estado actual y direcciones futuras

El presenta trabajo ofrece una visión crítica y reconstructiva de la Terapia de Aceptación y Compromiso (ACT) aplicada a la esquizofrenia. Dado que la terapia partía de concepciones psicopatológicas transdiagnósticas, no fue difícil expandir el tratamiento al ámbito de los síntomas psicóticos, existiendo razones conceptuales, clínicas y experimentales que avalaron esta extensión. Se analiza y explica el procedimiento estándar de la terapia, ilustrándolo, cuando es posible, con viñetas con diálogos. Se resumen cada una de las fases y se adapta a las peculiaridades de la población a la que está dirigida este trabajo. Igualmente se hace una revisión de los resultados de la terapia, resaltando las dificultades encontradas y, en general, la pérdida de resultados sólidos en comparación con otras intervenciones menos sofisticadas. La parte final del artículo presenta varias propuestas de futuro, tendentes a mejorar la terapia, que pasarían, en primer lugar, por reformular el propio concepto de esquizofrenia como un desorden del “yo” y, por otro lado, por adaptar ACT a la cultura española partiendo de las concepciones ratio-vitalistas de José Ortega y GassetThis paper provides a critical and reconstructive vision of Acceptation and Commitment Therapy (ACT) applied to psychotic symptoms. Taking into account that the therapy was based on transdiagnostical conceptions, it was not difficult to expand the scope of the treatment to psychotic symptoms; with experimental, conceptual, and clinical reasons that supported this extension. The article analyzes and explains the standard procedure of ACT, illustrating, when possible, with vignettes. Each of the phases of the Therapy are summarized and adapted to the peculiarities of psychotic patients. Also a review of the results of the therapy is exposed, highlighting the difficulties found for its application and, in general, the loss of solid results compared with other less sophisticated interventions. The final part of the paper presents several proposals for the future, aimed at improving the therapy. The first one could be to reformulate the concept of schizophrenia as a disorder of the “self”. The second proposal for the future could be adapt ACT to the Spanish culture, with José Ortega y Gasset as a reference for this tas

A note on isoperimetric inequalities of Gromov hyperbolic manifolds and graphs

We study in this paper the relationship of isoperimetric inequality and hyperbolicity for graphs and Riemannian manifolds. We obtain a characterization of graphs and Riemannian manifolds (with bounded local geometry) satisfying the (Cheeger) isoperimetric inequality, in terms of their Gromov boundary, improving similar results from a previous work. In particular, we prove that having a pole is a necessary condition to have isoperimetric inequality and, therefore, it can be removed as hypothesis.First author supported in part by a Grant from Ministerio de Ciencia, Innovación y Universidades (PGC2018-098321-B-I00), Spain. Second author supported in part by two Grants from Ministerio de Economía y Competitividad, Agencia Estatal de Investigación (AEI) and Fondo Europeo de Desarrollo Regional (FEDER) (MTM2016-78227-C2-1-P and MTM2017-90584-REDT), Spain. Also, the research of the second author was supported by the Madrid Government (Comunidad de Madrid-Spain) under the Multiannual Agreement with UC3M in the line of Excellence of University Professors (EPUC3M23), and in the context of the V PRICIT (Regional Programme of Research and Technological Innovation)

Introducción

Aquest monogràfic d'Anàlisi presenta avanços i novetats en l'ampli camp de l'alfabetització mediàtica dels joves. Assenyala les qüestions que semblen decisives en aquests moments i ho fa des d'una perspectiva internacional en la qual es combinen una mirada comparativa, en alguns casos, amb l'estudi local –especialment en qüestions que afecta a Europa i Espanya—. És una mostra de l'interès de la investigació en aquest camp i, al mateix temps, de la gradual integració i consolidació de metodologies i punts de vista compartits que s'està experimentant en aquest sector en els últims temps

Cheeger isoperimetric constant of Gromov hyperbolic manifolds and graphs

In this paper, we study the relationship of hyperbolicity and (Cheeger) isoperimetric inequality in the context of Riemannian manifolds and graphs. We characterize the hyperbolic manifolds and graphs (with bounded local geometry) verifying this isoperimetric inequality, in terms of their Gromov boundary. Furthermore, we characterize the trees with isoperimetric inequality (without any hypothesis). As an application of our results, we obtain the solvability of the Dirichlet problem at infinity for these Riemannian manifolds and graphs, and that the Martin boundary is homeomorphic to the Gromov boundary.Supported in part by a grant from Ministerio de Economíıa y Competitividad (MTM 2012-30719), Spain. Supported in part by two grants from Ministerio de Economíıa y Competitividad (MTM 2013-46374-P and MTM 2015- 69323-REDT), Spain, and a grant from CONACYT (FOMIX-CONACyT-UAGro 249818), México

Effects of green tea on the nutritional status of the exercise

Objetivo: evaluar el efecto del té verde o sus sucedáneos en el estado nutricional de los sujetos que realizan ejercicio físico. Metodología: las palabras clave son: “green tea” AND “exercise”, en cuatro bases de datos documentales: Pubmed, EBSCOHOST, OvidSP y Proquest. Criterios de inclusión (enero de 2010 y diciembre de 2014): edad adulta de la muestra (18-65 años, OMS); consumo de una cantidad cuantificada de té verde o sucedáneos, junto con la realización de ejercicio físico medible en intensidad. Resultados: de 260 artículos, se incluyeron el 5%. En el 69% se trata de estudios con un entrenamiento diseñado, y en el 92% se ha incluido un test de ejercicio para valorar parámetros. El 77% oscilan entre 20-40 años; las muestras varían entre 9 y 36 individuos. El 69% son de larga duración. El GTE ha sido el sucedáneo más utilizado (38%). El 92% de los ensayos han obtenido algún tipo de mejora (en el 92% fue significativa). Conclusiones: se recomienda aumentar las investigaciones sobre la clasificación de los ejercicios. Las mejoras significativas en el estado nutricional de los sujetos por la ingesta del té verde o sucedáneos son: IMC, peso, IGC, MM, INM, OM y MR. El GTE ha sido el que mayores resultados satisfactorios ha proporcionado. No existe homogeneidad en los resultados significativos. Se necesitan realizar nuevos ensayos clínicos. Las diferencias entre los ensayos clínicos revisados reflejan que las mejoras encontradas en el estado nutricional de los sujetos que realizan actividad física deben ser avaladas con nuevas investigaciones. Esto ayudará a crear evidencia en este tipo de aspectos.Purposes: assessing the magnitude of the effects of green tea in subjects that do exercise. Methodology: a search was been carried out with key words “green tea” AND “exercise” in four documentary databases: Pubmed, EBSCOHOST, OvidSP and Proquest. Inclusion criteria: adult age of the sample (18-65 years, based on WHO), and the consumption of a quantified amount of green tea or substitutes, along with doing physical exercise measurable in intensity, in clinical tests published between January 2010 and December 2014, whose source were indexed scientific journals. Results: 260 articles were analyzed, of which 13 items were selected. 69% are studies with a designed workout, and 92% have included an exercise test to assess parameters. 77% fluctuate between 20-40 years and sample size between 9 and 36 subjects. 69% are long length. GTE has been the most used substitute (38%). 92% of studies have obtained some improvement and 92% of them, were significantly statistic. Interpretation of results: little homogeneity has been found in results in the analysis of results expression. Sample size is limited. There is a wide range of GTE substitutes and diversity of doses and exercise done. It cannot be possible to establish a dose, dosage and physical activity recommended. Conclusions: green tea gives us a wide variety of benefits in combination with physical exercise. There is a little evidence about quality. It cannot be possible to establish specific recommendations for obtaining benefits