The construction of the Dos Hermanas cycle track, Sevilla (Spain)

El Instituto de Ciencias de la Construcción Eduardo Torroja (CSIC) organiza seminarios monográficos sobre temas de actualidad en el ámbito de la Tecnología de la Construcción y de sus Materiales a cargo de destacados investigadores nacionales y extranjeros del sector .-- Félix Escrig Pallarés José Sánchez Sánchez son Dres. Arquitectos de la Escuela TS de Arquitectura (Sevilla).[ES] El diseño y la construcción de la Cubierta para el velódromo de Dos Hermanas constituyó un reto de primera magnitud por varias razones: grandes dimensiones; no tocar, ni siquiera simbólicamente el edificio existente y hacer una obra sencilla que no pretendiera asombrar por su espectacularidad. Se buscaba hacer un edificio modesto a pesar de su dimensión. De hecho es un edificio que sobrecoge por su espacialidad interior más que por su apariencia externa. Otro reto planteado fue que sólo se sostuviera en cuatro soportes. Sería así una gigantesca mesa. Y, por último, no queríamos ver barras inclinadas, sólo una superficie que fluyera con naturalidad desde las alturas hasta la cabeza de los soportes, llevando las fuerzas de un modo natural y sin artificio. Quedaba por fi n el problema del cerramiento. Aunque se había pensado abierto, decisiones funcionales y de oportunidad solicitaron un cerramiento que no alterara el aspecto que tenía cuando estaba abierto. Ello se consiguió mediante un telón tensado que tampoco toca el edificio existente y, por tanto, no resta liviandad al conjunto metálico. El presente artículo pretende describir los aspectos constructivos que hicieron posible estas ambiciones desde el punto de vista de la práctica constructiva.[EN] Designing and building Dos Hermanas cycle track Roof was considered a first magnitude achievement for several reasons: first for their many great dimensions in plan, second for avoiding any contact with the existent old building, and third because the interest in make a simple piece not surprising for its spectacularity. In fact it is a building that surprise for the wide inner space more than for the external form. Another important goal was that the entire roof must be supported by only four legs, as a table. Never mind if the dimension of these legs were great because we could convert them in sculptural pieces. And the lat question was that for us it was very important not to exhibit triangulated girders but only a surface hanging from height to the top of columns, bringing forces in a natural way. When the roof was fi nished was planed to introduce a lateral wall. This fact not was considered during the previous design. The solution proposed was a fabric hanging from the roof border and selfprestressed without touch the old building. This paper show constructive processes and material details that at the end made possible our ambitions.Peer reviewe

The master plot in the audiovisual narrative. The western case.

A plot provides us the story that it offers a hyphen and later a film. Plots are limited, however possibilities, argument them that these offer music infinite. At the same time, we can say that all cultures avail themselves of some plots and similar arguments to structure their mythical stories. In addition, United States is the modern nation where better a dialectic relation between the myth and story keeps. At this nation, the significance of the event has been shown and you have gotten free through the myth. We will see through this article how the western is the kind of American cinema what else and better answer for the folkloric traditional story to the cánones, because your plots have been taken directly of the classical legends.Una trama nos proporciona la historia que ofrece un guión y más tarde una película. Las tramas son limitadas, sin embargo las posibilidades argumentales que éstas ofrecen son infinitas. Al mismo tiempo, podemos decir que todas las culturas se valen de unas tramas y argumentos semejantes para estructurar sus narraciones míticas. Por otro lado, Estados Unidos es la nación moderna donde mejor se mantiene una relación dialéctica entre el mito y la historia. En esta nación, el significado del acontecimiento se ha mostrado y se ha liberado a través del mito. A través de este artículo veremos cómo el western es el género de cine americano que más y mejor responde a los cánones del relato folklórico tradicional, pues sus tramas han sido tomadas directamente de las leyendas clásicas

What Drives Volunteers to Accept a Digital Platform That Supports NGO Projects?

Technology has become the driving force for both economic and social change. However, the recruitment of volunteers into the projects of non-profit-making organizations (NGO) does not usually make much use of information and communication technology (ICT). Organizations in this sector should incorporate and use digital platforms in order to attract the most well-prepared and motivated young volunteers. The main aim of this paper is to use an extended Technology Acceptance Model (TAM) to analyze the acceptance of a technological platform that provides a point of contact for non-profit-making organizations and potential volunteers. The TAM is used to find the impact that this new recruitment tool for volunteers can have on an ever-evolving industry. The TAM has been extended with the image and reputation and visual identity variables in order to measure the influence of these non-profit-making organizations on the establishment and implementation of a social network recruitment platform. The data analyzed are from a sample of potential volunteers from non-profit-making organizations in Spain. A structural equation approach using partial least squares was used to evaluate the acceptance model. The results provide an important contribution to the literature about communication in digital environments by non-profit-making organizations as well as strategies to improve their digital reputation

Informe sobre detección de necesidades de información [Recurso en línea]: Zona formativa 4 : Noroeste - Río Mula

Precede al título : Comisión territorial

Informe sobre detección de necesidades de información [Recurso en línea]: Zona formativa 6 : Altiplano

Precede al título : Comisión territorial

Determinantes de la estructura financiera de la empresa

En este artículo pretendemos ofrecer nueva evidencia empírica sobre los efectos de la dimensión empresarial y de pertenencia a un sector en la estructura financiera de las empresas. Para ello, partimos del papel que la literatura financiera ha reconocido tradicionalmente a estos dos factores como determinantes del nivel de endeudamientos de las corporaciones. La metodología que hemos utilizado para alcanzar tal objetivo ha consistido en la aplicación de la técnica estadística del análisis de varianza, sobre una muestra de empresas andaluzas en el periodo 2001. Los resultados alcanzados nos permiten confirmar que los factores tamaño y sector influyen de manera significativa en el nivel de endeudamiento de las empresas y, especialmente, en lo que se refiere a la financiación ajena a corto plazo.This paper analyse the relevance of two key factors in determining the capital structure of companies: firm size and industry classification. To this end, the statiscal methodology used is analysis of variance. Our analysis has been carried out on 6.338 andalusian companies for 2001 period. The results of our research show that size and sector factors influence significantly the level of debt of companies, specially the short-term funding

A financial analysis of born-global firms: evidence from Spain

From the beginning of the 1970s to the present day, significant changes have taken place in the competitive and organizational behavior of small and medium-sized companies (SMEs). Recently, some of these factors have applied more intensively, and this has given rise to growth in the number of new companies that undertake overseas operations almost immediately (known as born globals). The phenomenon of early internationalization is relatively recent, so there are still many aspects that need to be studied. The objective of this study is to contribute to the scarce empirical literature existing in Spain on this topic, by providing evidence on the possible differences in character of the born-global firms compared with the rest of exporting companies. To this end, the focus of the study is on the analysis of variables such as the size and sector of activity of these companies, and their principal economic and financial magnitudes. A sample of 1,324 Spanish SMEs that were exporting in 2007 was surveyed; of this total approximately 12% identified themselves as having adopted early internationalization. The results obtained indicate that the born-global firms are, on average, smaller; they are classified mostly to the services sector; and they are much more leveraged than the rest of Spanish SMEs that export

Mitigating energy poverty: Potential contributions of combining PV and building thermal mass storage in low-income households

The issue of energy poverty has devastating implications for the society, and it has been aggravated in the past years due to the economic crisis and the increase of energy prices. Among the most affected are those with low incomes and living in inefficient buildings. Unfortunately, the bitter reality is that sometimes this part of the population are facing the next question: Heating, or eating? The declining prices of distributed energy technologies such as photovoltaics provides an opportunity for positive social change. Although their use does not address energy poverty directly, substantial contributions may be made. Measurements of indoor temperatures in a social housing district of southern Spain in 2017 have revealed the unbearable temperatures that the occupants have to endure, both in summer and winter. Using this district as a case study, the present work aims to evaluate the benefits of exploiting its rooftop PV potential to cover part of the electricity consumption of the district (reducing the energy bills), and use the surplus electricity to supply power for the heat pumps in the district. Optimal alternatives regarding maximum PV production, maximum self-sufficiency ratio and minimum investment costs have been found, considering as well different options when sharing the available electricity surplus to improve the thermal comfort of the occupants. As far as the authors know, no previous study has followed an approach aimed at energy poverty alleviation such as the one presented in this work. The results show that using the surplus electricity to heat or cool the whole dwellings would improve the thermal comfort of the occupants in average up to 11% in winter and 26% in summer. If all the PV generation was used or more buildings in the area were employed to install PV modules, improvements up to 33% in winter and 67% in summer could be obtained, reducing at the same time the thermal comfort differences among the dwellings of the district