Bounding the residual finiteness of free groups

"Vegeu el resum a l'inici del document del fitxer adjunt."

Why do creative industries cluster? An analysis of the determinants of clustering of creative industries

Creative industries tend to concentrate mainly around large- and medium-sized cities, forming creative local production systems. The text analyses the forces behind clustering of creative industries to provide the first empirical explanation of the determinants of creative employment clustering following a multidisciplinary approach based on cultural and creative economics, evolutionary geography and urban economics. A comparative analysis has been performed for Italy and Spain. The results show different patterns of creative employment clustering in both countries. The small role of historical and cultural endowments, the size of the place, the average size of creative industries, the productive diversity and the concentration of human capital and creative class have been found as common factors of clustering in both countries.

Technological innovation in creative clusters. The case of laser in conservation of artworks in Florence

The field of laser application to the restoration and cleaning of cultural assets is amongst the most thriving developments of recent times. Ablative laser technological systems are able to clean and protect inestimable works of art subject to atmospheric agents and degradation over time. This new technology, which has been developing for the last forty year, is now available to restorers and has received a significant success all over Europe. An important contribution in the process of laser innovation has been carried out in Florence by local actors belonging to a creative cluster. The objects of the analysis are the genesis of this innovation in this local Florentine context, and the relationships among the main actors who have contributed in it. The study investigates how culture can play a part in the generation of ideas and innovations, and which are the creative environments that can favour it. In this context, the issue of laser technologies for the restoration of cultural heritage has been analysed as a case study in the various paths taken by the Creative Capacity of the Culture (CCC).

Industrial district effects and innovation in the Tuscan shipbuilding industry

The aim of the present work is to investigate innovative processes within a geographical cluster, and thus contribute to the debate on the effects of industrial clusters on innovation capacity. In particular, we would like to ascertain whether the advantages of industrial districts in promoting innovation, as already revealed by literature (diffusion of knowledge, social capital and trust, efficient networking), are also keys to success in the Tuscan shipbuilding industry of pleasure and sporting boats. First, we verify the existence of clusters of shipbuilding in Tuscany, using a specific methodology. Next, in the identified clusters, we analyse three innovative networks financed in a policy to support innovation, and examine whether the typical features of a cluster for promoting innovation are at work, using a questionnaire administered to 71 actors. Finally, we develop a performance analysis of the cluster firms and ascertain whether their different behaviours also lead to different performances. The analysis results show that our case records effects of industrial clustering on innovation capacity, such as the important role given to trust and social capital, the significant worth put in interfirm relations and in each partner’s specific competencies, or even the distinctive performance of firms belonging to a cluster.

La correspondencia entre Robert Moray y Christiaan Huygens (1661-1669): encuentros y desencuentros en la promoción del conocimiento

Sir Robert Moray (1608/9-1673) fue un soldado, cortesano y "hombre de ciencia" escocés, que estuvo en el exilio durante el período de Oliver Cromwell. Poco después de su regreso a Inglaterra en 1660 y gracias en gran medida a su amistad con Carlos II, aparece vinculado al grupo que formará la Royal Society de Londres y será nombrado el primer presidente de la institución durante los primeros meses. Moray ha sido reconocido como una figura imprescindible para entender la consolidación de la Royal Society. Establece, además, una correspondencia muy importante con Christiaan Huygens, en donde aparecen tratados temas de gran relevancia en la década de 1660, tales como la determinación de la longitud en el mar mediante el uso del reloj de péndulo y la construcción y experimentación con la máquina neumática (emblema del proyecto experimental de Robert Boyle). En esta correspondencia aparecen reflejadas, así mismo, las tensiones sobre los problemas de prioridad en diferentes áreas de conocimiento. Una de estas agrias polémicas es la que enfrenta a James Gregory y a Huygens, que acabará con la relación epistolar entre Moray y el sabio holandés.

El Dios en la maleta. Análisis antropológico de las representaciones y prácticas religiosas de los ecuatorianos migrados a Bercelona y Nueva York

Nuestra investigación pretende abordar el estudio de la identidad católica ecuatoriana y su vivencia entre los migrantes residentes en Barcelona y New York. Cuando hablamos de identidad católica, pensamos en un determinado hábitat de sentido (Hannerz) o sistema cultural (Geertz) que satisface la sed de sentido de sus seguidores proveyéndoles de una determinada cosmovisión que éstos perciben como “emocionalmente convincente” (Geertz). A través de nuestra etnografía multisituada, desarrollada en Barcelona (6 meses), New York (6 meses) y Ecuador (3 meses), intentamos definir el tipo de influencia de este referente identitario en la manera de significar la realidad y de actuar de sus portadores, ante la experiencia de la movilidad y del encuentro con la alteridad. Para definir correctamente el influjo de este universo significativo en la experiencia migratoria vamos, paralelamente, a tratar de interpretar su “estructura significativa” (Geertz). En particular, reanudando los estudios propios de la Antropología de las Religiones (y el enfoque geertziano en la dimensión cultural de la religión), analizaremos sus creencias (sus mitos) y sus prácticas (los rituales); interpretándolos simbólicamente y analizando los efectos que estos dos diferentes niveles expresivos del universo católico (ecuatoriano) derraman tanto en la dimensión íntima del creyente, como en la social.

Media exposure and internal migration-evidence from Indonesia

This paper investigates the impact of television on internal migration in Indonesia. We exploit the differential introduction of private television throughout the country and the variation in signal reception due to topography to estimate the causal effect of media exposure. Our estimates reveal important long and short run effects. An increase of one standard deviation in the number of private TV channels received in the area of residence reduces future inter-provincial migration by 1.7-2.7 percentage points, and all migration (inter and intra-provincial) by 4-7.4 percentage points. Short run effects are slightly smaller, but still sizeable and statistically significant. We also show that respondents less exposed to private TV are more likely to consider themselves among the poorest groups of the society. As we discuss in a stylized model of migration choice under imperfect information, these findings are consistent with Indonesia citizens over-estimating the net gains from internal migration.

Assaig de definició de l’àrea urbana de Girona

This article is an essay aiming at the definition of the urban district of Girona, having as a base the analysis of the intensities and directional tendencies of labour mobility fluxes in it. Several cathegories will be signaled inside this area which wil enable us to differenciate a number of crowns of municipalities according to their respective links with Girona town. A reflection set forth by Francesco Indovina on the concept of diffused town will be the first step in the attempt to typify this area. Thus, the existence of a diffused city core of which would be Girona town will be argued, an issue this one which is to be analysed in future studies