Geometry,Construction and Structural Analysis of the Crossed-Arch Vault of the Chapel of Villaviciosa,in the Mosque of Córdoba

The vault of Villaviciosa is one of the oldest existing examples of a true ribbed vault, and is the first of the crossed-arch type. Although its perfection suggests earlier trials, none has been found so far. It predates the oldest Romanesque ribbed vaults by more than a century. Notwithstanding its importance, no construction and structural study has ever been done; neither has an accurate survey been published. The purpose of this article is to fill this gap in the history of vault construction. A detailed survey has been made, providing the first accurate drawings of the vault. A close inspection of the extrados, completed with a visual inspection of interior damages, has allowed ascertaining the main construction features. With the geometry and the material data a structural analysis has been carried out. This analysis explains the fundamental structural behavior of the vault and throws new light into some historical issues; for example, it leads to discarding the widespread belief that the ribs are decorative: they are supporting the weight of the vault.     

Applying the technique of image classification to climate science: the case of Andalusia (Spain)

This paper proposes an empirical climate classification method based on the application of multivariate statistics. In this method, the technique of supervised and unsupervised image classification is used to classify the data and define climatic units. envi software is used to perform the image classification, specifically, the Iterative Self‐Organizing Data Analysis Technique algorithm. Supervised classification is also applied based on reference variables, fundamental parameters and a classifier. The obtained results display greater objectivity, reliability, operability, accessibility and reproducibility than previous climate classifications devised for the region of Andalusia (Spain), taking into account that these previous classifications were not based on quantitative criteria.     

Ancestral memories and early medieval landscapes: the case of Sierra de Ávila (Spain)

This paper focuses on early medieval funerary practices from a landscape perspective in central Iberia. Rock‐dug graves constitute the most conspicuous remains in this region, but their informative potential has not yet been realized. The preliminary outcomes of an ongoing research project are presented here. This aims to contextualize such funerary cases by examining a mid‐altitude mountain study‐area. Through the use of intensive archaeological surveying and geographic information systems, the paper characterizes two basic funerary types: isolated graves and rural disordered cemeteries, which responded to two social strategies led by local households. By recalling ancestorship, they constituted effective mnemonic resources, contributing to claiming rights and forging identities among these dispersed and predominantly small‐scale herding communities.     

Three decades of land-use changes in the region of Madrid and how they relate to territorial planning

In recent decades, the region of Madrid has experienced extensive changes in land use-land cover (LULC). Most of these changes are related to an increase in developed areas (urban, industrial, commercial and transport) and abandonment of agricultural uses. The general guideline for regional management has been disregarded and the legal framework overstepped, allowing such changes to go ahead unchecked. Using four maps for different points in time, 1982, 1990, 2000 and 2006, LULC dynamics are analysed and the changes are related to Madrid regional policies. The IDRISI Land Change Modeller is used in order to quantify the changes and find out where they took place. The results show that developed areas doubled in size between 1982 and 2006. Changes were concentrated around the Madrid metropolis and around the main road network, with an increase in urban sprawl and with new, small urban patches in mountain areas of high scenic beauty. These fast and extensive changes were largely made possible by public disinterest and limitations in land and natural resource conservation mechanisms and in housing market regulation.     

Tableware in the Hellenistic Tradition from the City of Kampyr Tepe in Ancient Bactria (Uzbekistan)

Slipped and unslipped wares from Kampyr Tepe dated to the Hellenistic–Seleucid and Greco‐Bactrian periods stylistically resemble tableware from the Greek tradition. Since two pottery workshops have been recovered at the site, the aim is to shed light on the provenance and the production and consumption patterns of the tableware, as well as on the degree of technological influence from Hellenistic–Mediterranean traditions. The archaeometric characterization, consisting of thin‐section petrography, XRF, XRD and SEM–EDS analysis, was performed on 44 wares and three unfired locally made pondera, which were used as reference local elemental patterns. The study demonstrated the local origin of most of the wares, which were produced using a similar clay paste, following standardized techniques in modelling and firing, while surface treatments appear to be more diversified.     

Cluster Life Cycles,Path Dependency and Regional Economic Development: Insights from a Meta-Study on Basque Clusters

In this study, we aim at evaluating the role of path-dependent and past-dependent forces in the historical trajectory of clusters. For that purpose, we study the life cycles of four of the main industrial clusters in the Basque Country (paper-making, electronics and information and communication technology, maritime industries and aeronautics) and analyse the factors that account for the origin, development, maturity and, if so, decline of those clusters, considering factors related to both cluster dynamics and the regional environment. Our analysis shows that the existence of a life cycle does not imply a straightforward growth path. Clusters follow multiple growth patterns in their development. The heterogeneity of growth patterns may be, in some cases, due to different initial conditions. However, despite similar initial conditions and/or resource endowments and opportunities for development, we can observe heterogeneous evolutionary patterns. Clusters react differently to the same external shocks (e.g. international demand, global competition and technological change) and evolve differently according to their capabilities.     

The Present State of Research into Industrial Clusters and Districts. Content Analysis of Material Published in 1997–2006

The aim of this work is to help gain a better understanding of the research conducted on territorial agglomerations of firms at a multidisciplinary level. To this end, an analysis was performed of the contents of the most significant scientific literature on economics, management, planning and development, urban studies and geography published over the period 1997–2006. From the results, a database of 142 papers from 43 journals was then elaborated. An analysis of these works reveals the level of development of the main lines of research in this field and, consequently, makes it possible to detect the topics that require greater attention and that can be the object of future research for researchers and academics. The main conclusions include the growing number of studies conducted on the subject in recent years, as well as a greater predominance of empirical research over conceptual work, and the existence of a significant change in the topics or lines of research throughout the period under study.     

Chemists,engineers and entrepreneurs the chemical institute of sarrià's impact on Spanish industry (1916–1992)

This paper analyzes the influence the Chemical Institute of Sarrià (IQS) ‐a private institution devoted both to the education of chemists and chemical engineers and to applied research‐ has had on Spain's chemical industry from 1916 onwards. The research reported is based upon three data sources (articles on industrial chemistry published by the IQS’ journal Afinidad and M. Se. theses; IQS graduates’ industrial activities; and technical services carried out by the Institute's staff for several companies). The main conclusion is that the IQS has had a remarkable impact on Catalan and Spanish industry. Although there are no other similar studies on Spanish scientific and technical institutions, the IQS case confirms that technical education and institutionalized research have a positive impact on the economic and industrial development of “latecomers” like Spain.