Función educativa de la actividad física y deportiva: aspectos diferenciales

La evolución de la Actividad Física y Deportiva en la cultura contemporánea nos ha llevado a considerar diversos aspectos de marcado interés como: La naturaleza multiforme del concepto deporte y la importancia de fomentar el resurgimiento social de ciertas formas tradicionales del mismo, centrandonos en la perspectiva del Deporte para todos, y su relación con el deporte de élite; así como, en el resurgimiento de las nuevas manifestaciones sociales del deporte contemporáneo.También hemos querido subrayar determinados aspectos de tratamiento diferencial en la práctica deportiva, con respecto a los grupos poblacionales de más edad y con respecto al géneroThe sports and physical education evolution in the contemporary culture has led us to consider some interesting different aspects of it such as: The multiform nature of the sports concept and the importance of encouraging the social resurgence of some traditional ways of it, placing ourselves on «The sport for everyone» perspective and its relation with the competition sport, and the new social manifestation of the contemporary sports revival. We have also wanted to emphasize certain aspects of differential treatment in the sports practice refering to the elderly population groups and to the gende

Fuentes de financiación alternativas para Pymes

Para una empresa, la elección de una fuente de financiación u otra es una decisión fundamental, ya que condicionará la supervivencia, en este caso, de las Pymes. En España, las empresas dependen en gran medida de la financiación bancaria. Durante la crisis económica todos los bancos redujeron las concesiones de créditos, lo que supuso que muchas empresas tuvieran que buscar financiación a través de otros cauces. Aquí aparecen las fuentes alternativas detalladas en el trabajo. Podemos señalar como ejemplos de estas fuentes Family, Friends and Fools, Business Angels, Sociedades de Capital – Riesgo y Crowdfunding, que son fuentes de financiación privadas no bancarias que aportan beneficios tanto monetarios como no monetarios a las empresas, y contribuyen a un mayor crecimiento y desarrollo de las Pymes y emprendedores en general, y de nuestro país en particular.Grado en Administración y Dirección de Empresa

Study on the contamination rate of mineral oil in natural-ester retrofilled transformers

The replacement of mineral oil (MO) by ester (retrofilling) is a practice used in power transformers to reduce fire and environmental risk. Although measures are taken to remove traces of oil on the paper, a certain amount of MO remains, which migrates over time. This article presents a study to evaluate the migration of MO from paper to ester using techniques such as the iodine value or the measurement of permittivity and dielectric losses.This work was supported in part by the Spanish Research Agency under Project PID2019-107126RB-C21/AEI/10 and Project 13039/501100011033, and in part by the European Union's Horizon 2020 Research and Innovation Program under Grant 823969

El mercado y la actividad agrícola como impulso de la urbanización en Medio Piura

Propuesta de intervención en la agrupación de asentamientos dispersos de pequeña escala de Medio Piura, Piura, Perú mediante la asociación con la Universidad de Piura. Se propone el modelo de desarrollo de un conjunto de asentamientos elegido tras un análisis previo de la zona. Se trabaja con el concepto de vivienda semilla, vivienda progresiva que inicialmente cumple con las condiciones mínimas de habitabilidad y que puede ser ampliada, mejorada y completada con el tiempo. Por último, el sistema de viviendas se completa con la construcción de un mercado, espacio versátil que pueda actuar como espacio público en función de su momento del día. Para el desarrollo del proyecto se fomenta el uso de materiales locales de bajo coste como son: el BTC, la quincha o el bambú

A New Method for the Quantification of the Remaining Mineral Oil in Natural-Ester Retrofilled Transformers

Assessing the amount of remaining mineral oil in retrofilled transformers is vital since that presence may worsen flash and fire point of the ester and impact the transformer dielectric performance; this article proposes a new experimental methodology to quantify the ratio of mineral oil in natural esters.This work was supported in part by the Spanish State Research Agency under Grant PID2019-107126RB-C21/ AEI/10.13039/501100011033 and in part by the European Union's Horizon 2020 Research and Innovation Program, under Grant number 823969

Dielectric Strength of Nanofluid-Impregnated Transformer Solid Insulation

The interest in developing new fluids that can be used as dielectric liquids for transformers has driven the research on dielectric nanofluids in the last years. A number of authors have reported promising results on the electrical and thermal properties of dielectric nanofluids. Less attention has been paid to the interaction of these fluids with the cellulose materials that constitute the solid insulation of the transformers. In the present study, the dielectric strength of cellulose insulation is investigated, comparing its behavior when it is impregnated with transformer mineral oil and when it is impregnated with a dielectric nanofluid. The study includes the analysis of the AC breakdown voltage and the impulse breakdown voltage of the samples. Large improvements were observed on the AC breakdown voltages of the specimens impregnated with nanofluids, while the enhancements were lower in the case of the impulse tests. The reasons for the increase in AC breakdown voltage were investigated, considering the dielectric properties of the nanofluids used to impregnate the samples of cellulose. The analysis was completed with a finite element study that revealed the effect of the nanoparticles on the electric field distribution within the test cell, and its role in the observed enhancement.This work was supported by the Spanish State Research Agency under grant PID2019- 107126RB-C21/ AEI/10.13039/501100011033 and by the Spanish Ministry of Economy and Competitiveness under grant DPI2015-71219-C2-2-

Use Performance and Management of Biodegradable Fluids as Transformer Insulation

In recent years, the use of biodegradable fluids as liquid insulation for distribution and power transformers is spreading. The main biodegradable fluids used are natural and synthetic esters, although biodegradable hydrocarbons have been recently proposed. Biodegradable fluids have a much lower environmental impact than mineral oil, limiting the risk of soil contamination in leaks, which makes them a suitable solution for applications such as offshore transformers or railway transformers. Additionally, these fluids have a higher flash point than conventional mineral oils, which dramatically reduces the risk of fire and collateral damage derived from explosion and fire. Despite these advantageous factors, there are still some aspects that hinder the broadening of their use, such as the difference in thermal properties or the lack of accepted maintenance procedures for transformers that use them as liquid insulation. This paper presents the current status of biodegradable insulating fluids, analyzing some of their properties and discussing the aspects that are still to be investigated in order to make them a real alternative to petroleum-based fluids.Part of the work was performed during secondments and short visits between University of Valle, University Carlos III of Madrid and University of Cantabria executed in the framework of the BIOTRAFO project “Raising knowledge and developing technology for the design and deployment of high-performance power transformers immersed in biodegradable fluids”, H2020-MSCA-RISE-2018- 823969, 2019-21. This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 823969. Also, we acknowledge the support of the Spanish Ministry of Science and Innovation by means of the National Research Project Asset management of biodegradable-fluid-based transformers (PID2019-107126RB-C21/AEI/10.13039/501100011033 and PID2019-107126RB-C22/AEI/ 10.13039/501100011033)

NFATc3 controls tumour growth by regulating proliferation and migration of human astroglioma cells

Calcium/Calcineurin/Nuclear Factor of Activated T cells (Ca/CN/NFAT) signalling pathway is the main calcium (Ca2+) dependent signalling pathway involved in the homeostasis of brain tissue. Here, we study the presence of NFATc members in human glioma by using U251 cells and a collection of primary human glioblastoma (hGB) cell lines. We show that NFATc3 member is the predominant member. Furthermore, by using constitutive active NFATc3 mutant and shRNA lentiviral vectors to achieve specific silencing of this NFATc member, we describe cytokines and molecules regulated by this pathway which are required for the normal biology of cancer cells. Implanting U251 in an orthotopic intracranial assay, we show that specific NFATc3 silencing has a role in tumour growth. In addition NFATc3 knock-down affects both the proliferation and migration capacities of glioma cells in vitro. Our data open the possibility of NFATc3 as a target for the treatment of glioma.This work was supported by grants from the Fondo de Investigaciones Sanitarias (FIS) Spain (PI09/0218) and Red Temática Investigación Cooperativa en Cáncer (RTICC. (RD12/0036/0027) Grants from the Spanish Ministry (MINECO) (SAF2016-76451) to E.C.S

Use performance and management of biodegradable fluids as transformer insulation

In recent years, the use of biodegradable fluids as liquid insulation for distribution and power transformers is spreading. The main biodegradable fluids used are natural and synthetic esters, although biodegradable hydrocarbons have been recently proposed. Biodegradable fluids have a much lower environmental impact than mineral oil, limiting the risk of soil contamination in leaks, which makes them a suitable solution for applications such as offshore transformers or railway transformers. Additionally, these fluids have a higher flash point than conventional mineral oils, which dramatically reduces the risk of fire and collateral damage derived from explosion and fire. Despite these advantageous factors, there are still some aspects that hinder the broadening of their use, such as the difference in thermal properties or the lack of accepted maintenance procedures for transformers that use them as liquid insulation. This paper presents the current status of biodegrad able insulating fluids, analyzing some of their properties and discussing the aspects that are still to be investigated in order to make them a real alternative to petroleum-based fluids.Part of the work was performed during secondments and short visits between University of Valle, University Carlos III of Madrid and University of Cantabria executed in the framework of the BIOTRAFO project “Raising knowledge and developing technology for the design and deployment of high-performance power transformers immersed in biodegradable fluids”, H2020-MSCA-RISE-2018- 823969, 2019-21. This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 823969. Also, we acknowledge the support of the Spanish Ministry of Science and Innovation by means of the National Research Project Asset management of biodegradable-fluid-based transformers (PID2019-107126RB C21/AEI/10.13039/501100011033 and PID2019-107126RB-C22/AEI/ 10.13039/501100011033)

Doctor profesor Ángel Fernando Sánchez Vicente. Paradigma docente en la enseñanza de histologia

RESUMEN El Dr. Ángel Sánchez Vicente es un paradigma de docente en la enseñanza en el Instituto de Ciencias Básicas y Preclínicas «Victoria de Girón», en particular de la Histología. Excelente profesor en el uso del pizarrón y precursor de las tecnologías de avanzadas vinculadas a la docencia. Inició su larga carrera en la docencia Médica, como Profesor Auxiliar en la Cátedra de Histología-Embriología, en el año 1966, en el ICBP «Victoria de Girón». En 1976 fue promovido a la categoría de Profesor Titular. Su larga experiencia como profesor de pre-universitario y en la especialidad de Histología, ponen en evidencia, su vocación por la enseñanza. Por todos los años que dedicó a la docencia, el Doctor Ángel Sánchez contribuyó a la formación de muchos bachilleres y médicos que lo recuerdan con cariño y orgullo por haber sido sus alumnos.  Palabras clave: excelente profesor, paradigma de la docencia, extraordinario maestro.</p