On statistical properties of traded volume in financial markets

In this article we study the dependence degree of the traded volume of the Dow Jones 30 constituent equities by using a nonextensive generalised form of the Kullback-Leibler information measure. Our results show a slow decay of the dependence degree as a function of the lag. This feature is compatible with the existence of non-linearities in this type time series. In addition, we introduce a dynamical mechanism whose associated stationary probability density function (PDF) presents a good agreement with the empirical results.Comment: 6 pages, 4 figures, 1 table. Based on the talk presented at "News, Expectations and Trends in Statistical Physics, NEXT-SigmaPhi 3rd International Conference. 13-18 August 2005, Kolymbari CRETE" Multi-fractal analysis section remove

Modelo de cuantificación del consumo energético en edificación

The research conducted in this paper focuses on the generation of a model for the quantification of energy consumption in building. This is to be done through one of the most relevant environmental impact indicators associated with weight per m2 of construction, as well as the energy consumption resulting from the manufacturing process of materials used in building construction. The practical application of the proposed model on different buildings typologies in Seville, will provide information regarding the building materials, the subsystems and the most relevant construction elements. Hence, we will be able to observe the impact the built surface has on the environment. The results obtained aim to reference the scientific community, providing quantitative data comparable to other types of buildings and geographical areas. Furthermore, it may also allow the analysis and the characterization of feasible solutions to reduce the environmental impact generated by the different materials, subsystems and construction elements commonly used in the different building types defined in this study.La investigación realizada en el presente trabajo plantea la generación de un modelo de cuantificación del consumo energético en edificación, a través de uno de los indicadores de impacto ambiental más relevantes asociados al peso por m2 de construcción, el consumo energético derivado del proceso de fabricación de los materiales de construcción empleados en edificación. La aplicación práctica del modelo propuesto sobre diferentes tipologías edificatorias en Sevilla aportará información respecto a los materiales de construcción, subsistemas y elementos constructivos más impactantes, permitiendo visualizar la influencia que presenta la superficie construida en cuanto al impacto ambiental generado. Los resultados obtenidos pretenden servir de referencia a la comunidad científica, aportando datos numéricos que podrán ser comparados en otras tipologías y ámbitos geográficos, a la vez que permitirán analizar y precisar mejoras en cuanto al impacto ambiental generado por los diferentes materiales, subsistemas y elementos constructivos habitualmente utilizados en las tipologías edificatorias definidas

Sustainability Assessment in Singular Structures, Foundations and Structural Rehabilitation in Spanish Legislation

The objective of this work is twofold: to determine the scope of the tools currently available for the assessment of sustainability of structures in Spanish legislation; and to identify environmental aspects that have yet to be covered, especially in the case of foundations and of measures aimed at the structural rehabilitation of singular buildings. To this end, the method proposed in the Spanish Instruction of Structural Concrete is applied to the particular case of the supported foundations of the Cylindrical and Colonel buildings in the construction of the new Faculties of Law and of Work Sciences, of the University of Seville during the period between 2005 and 2008. This case was chosen for its special uniqueness and for its inclusion of environmental aspects that remain outside the scope of existing methods. Most of these aspects are also of great relevance in structural rehabilitation activities carried out in urban environments and neighbourhoods, where a major surge is currently underway due to the economic crisis that has hit projects of newly constructed buildings. By virtue of the work carried out in recent years in the field of sustainability and the environment by several research groups at the University of Seville, a number of alternatives are proposed for the quantification of those aspects that remain to be considered. These techniques are based on tools that allow the agents to intervene in a flexible and effective way in the project implementation phase

El Fomento de la Ganadería en Aragón en relación con el Progreso de la Agricultura : Conferencia dada el día 22 de enero de 1926

Port. enmarcada en orla tip.Enc. rústica, cub. imp.Copia digital. Zaragoza : Diputación General de Aragón, 201

Yet on statistical properties of traded volume: correlation and mutual information at different value magnitudes

In this article we analyse linear correlation and non-linear dependence of traded volume, $v$, of the 30 constituents of Dow Jones Industrial Average at different value scales. Specifically, we have raised $v$ to some real value $\alpha$ or $\beta$, which introduces a bias for small ($\alpha, \beta <0$) or large ($\alpha, \beta >1$) values. Our results show that small values of $v$ are regularly \emph{anti-correlated} with values at other scales of traded volume. This is consistent with the high liquidity of the 30 equities analysed and the asymmetric form of the multi-fractal spectrum for traded volume which has supported the dynamical scenario presented by us.Comment: 6 pages, 2 figure

(In)justicia multidimensional y pedagogías socialmente justas: el caso de un padre de un niño con discapacidad

In this article, we intend to contribute to the debate of educational justice, especially for children with special needs, challenging those theories that focus only on unidimensional aspects. Using Gewirtz's multidimensional model of justice and the frame of socially just pedagogies, we analyse the case of Oscar, a father of a child with Down Syndrome, who is looking for a school for his son. The case develops in the Chilean educational system context, which is known by its neoliberal policy frame and its highly stratified structure. For this reason, a new inclusion law and, specifically, a new school admission system were implemented in 2015 and 2017 respectively, to generate a fairer and more equal school admission policy frame. Therefore, our theoretical proposition has practical implications, in policy terms, and analytical ones. We propose to add two dimensions of educational justice at the time we analyse Oscar’s case: first, educational justice must embrace injustices that are not necessarily experienced in formal educational spaces; we call this the multi-spatiality dimension of justice. Second, we propose a multi-temporality analysis of educational justice, one that considers, as socially just pedagogies have established, a focus on the future. In this case the educational policy and discourse promotes a pre-established and normalised future for children, one that is problematic for children with disabilities, whose parents, like Oscar, have a more urgent focus on the present.En este artículo, pretendemos contribuir al debate de la justicia educativa, especialmente para niños/as con necesidades especiales, desafiando aquellas teorías que se enfocan solo en aspectos unidimensionales. Utilizando el modelo multidimensional de justicia de Gewirtz y el marco de las pedagogías socialmente justas, analizamos el caso de Oscar, padre de un niño con Síndrome de Down, que busca una escuela para su hijo. El caso se desarrolla en el contexto del sistema educativo chileno, que se caracteriza por un marco político neoliberal y con una estructura altamente estratificada. Debido a esto es que en 2015 y 2017 respectivamente, se implementó una nueva ley de inclusión y, específicamente, un nuevo sistema de admisión escolar, para generar un marco de política de admisión escolar más justo y equitativo. De este modo, nuestra propuesta teórica tiene implicaciones prácticas—en términos de política pública— y analíticas. Proponemos agregar dos dimensiones de la justicia educativa al momento de analizar el caso Oscar: primero, la justicia educativa debe abrazar injusticias que no necesariamente se viven en los espacios educativos formales; a esto lo llamamos la dimensión multiespacial de la justicia. En segundo lugar, proponemos un análisis de multitemporalidad de la justicia educativa, que considere, como lo han establecido las pedagogías socialmente justas, un enfoque hacia el futuro. En este caso, la política y el discurso educativo promueven un futuro preestablecido y normalizado para los niños y niñas, lo que es problemático para los niños/as con discapacidad, cuyos padres, como Oscar, tienen un foco en el presenta más urgente

Communicating in 140 Characters. How Journalists in Spain use Twitter = Comunicar en 140 caracteres. Cómo usan Twitter los comunicadores en España

The emergence of Twitter appears to be changing information practices. Hence, a great deal of recent research is based on its popularity among communicators, reaching the conclusion that it serves to increase interactivity with readers. But to what degree is it true that it contributes to a type of journalism which is more open to the public? This research aims especially to clarify two main questions: what specific uses do journalists make of Twitter and to what extent does twoway interaction with the public take place through this medium? It is based on the quantitative analysis of a sample comprising almost 5 million tweets posted by 1,504 Spanish media communicators, perhaps the largest sample studied so far. The analysis shows the existence of a twospeed Twitter (with a minority of influential communicators and a majority who have little impact), which has negligible interaction with followers. With few exceptions, the communicators establish endogamous relationships on Twitter. They respond to mention and retweet colleagues, failing to take advantage of the multidirectional potential offered by the platform. This research expands the empirical basis which can be used to consider and discuss the scope and limits of user participation in information events. Many authors have theorized on this subject, perhaps too enthusiastically and arguably from a somewhat utopian perspective

Pop-Rock Festivals Today: counterculture hippie transformed into a mainstream commodity

In recent years, outdoor pop-rock festivals are becoming a global phenomenon due to their power for attracting tourists and encouraging the economic development of the area that hosts them, but also because they have adapted to the cultural practices of the younger generations, which are dominated by speed, condensation and the search for experiences. Nowadays, it can be argued that festivals, especially outdoor festivals, are products elaborated, designed, planned and commodified by the current cultural and creative industries, in particular by the music business, but also by other actors involved in the process of their development. As a result, festivals have proliferated all over the world, whose organisers have used the collective imaginary of the Counterculture festivals of the 70s and 80s in order to produce commercially marketable, saleable, experienced products that are more typical from the entertainment economy than from culture. Using an in-depth documentary review and interviews with experts, this paper aims to offer a conceptual delimitation that describes the current nature of the phenomenon, which is heir to the hippie counterculture, but is more like an experience and leisure destination. The results suggest that contemporary outdoor pop-rock festivals have transcended beyond the musical product to convert themselves into ecosystems where the players involved —organisers, sponsors, artists, festival-goers, authorities, mass media, etc.— develop their own narratives, rooted in the collective imaginary of popular culture regarding rock festivals, in order to create a product that can be consumed in an experiential way. In the same way, the study shows that, despite the differences and specificities of each event, we are faced with a truly uniform and global phenomenon that responds to common and recognisable characteristics in each one of them.This participation has been funded by the PAIDI Group of the University of Malaga (Spain), SEJ-435 “Contenidos audiovisuales avanzados”, coordinated by Miguel de Aguilera Moyano. Campus de Excelencia Internacional Andalucía Tech

Improving the animal welfare of the livestock farm of the can Coll educational equipment

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Hibridando el saber: investigar sobre comunicación y música

Comunicaciones presentadas para las I Jornadas de Investigación Doctoral sobre Comunicación y Música, celebradas el 7 de junio de 2010 en el Aula Magna de la Facultad de Ciencias de la Comunicación de la Universidad de Málaga