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.     

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.     

Double opening,split temporality,and new spatialities: an interview with Sandro Mezzadra on ‘militant research’

Abstract

A militant research approach, Mezzadra suggests, should gesture towards a ‘double opening’: towards struggles on the one hand, and towards the production of concepts and theoretical innovation on the other. Mezzadra defines militant investigation as ‘the ability to localize and consolidate the possibility for ruptures’ and as a practice that does not take the meaning of ‘political struggle’ for granted. Building on the ‘within and against’ militant posture of the Italian Workerist tradition, Mezzadra reflects on the split temporality of militant investigations and on the contested spaces of a political epistemology of migrations.     

Neutrality and submarine warfare: Germany and Spain during the First World War

The Spanish government maintained official neutrality during the Great War because deviating from neutrality would supposedly endanger the nation’s already limited political and social stability and even threaten the survival of the monarchic regime. In August 1914 there were no direct Spanish interests in the conflict and no benefit to be obtained from any intervention by Spain, which was very weak in military terms and in the international arena. Nevertheless, Spain’s geographic location and its commercial dependence on the Entente made it especially vulnerable to the pressures of France and Great Britain, both of which attempted to take advantage of the services that Spain could offer in the economic war; Spain’s importance increased with the prolongation of the fight. Germany, in contrast, could not hope for more from Spain than its strict neutrality because of its highly important political and economic ties with the Entente and its defencelessness before England and France, from which Germany could not protect it. Because Germany could not wait for Spain’s participation next to her, the primary target of German diplomacy had to be to resist the influence of the Entente and maintain Spanish neutrality while preventing Spain from inclining towards favouring the Allies. To achieve this objective, Berlin fed, with vague promises, the idea that a Spanish collaboration would be rewarded with the annexation of some territories. On this basis, we can begin to study German–Spanish relations during the Great War, which came to be determined by incidents that were caused by the submarine war. The dependence on the Entente also helps to explain the last evolution of the relations between Germany and Spain, which could follow no other policy than that imposed by the final development of the war: taking up a position near the winners and distancing from, and nearly rupturing ties with, Germany. Using both Spanish and German documentation allows us to reach different conclusions that aim to contribute substantially to understanding the relationship between Spain and Germany during the Great War.     

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.     

Testing micro-regional variability in the Holocene shaping of high mountain cultural landscapes: a palaeoenvironmental case-study in the eastern Pyrenees

Previous research acknowledges the ancient and complex land-use history of European mountainous areas, which are characterised by a remarkable regional variability in terms of human practices and patterns of occupation during the Holocene. However, the combined palaeoenvironmental and archaeological study of highland human management at a micro-regional scale remains a largely unexplored research field, especially in the Pyrenees. A combined pollen, stomata, non-pollen palynomorphs (NPPs) and macrocharcoal study was carried out at three nearby alpine and subalpine peat basins from a relatively small territory (ca.1700 ha) at the Madriu valley (Andorra, eastern Pyrenees), following a fine spatial-resolution strategy. The purpose was to test the suitability of high altitudinal palaeoecological sequences when reconstructing past small-scale land-use variability. The palaeoecological results of those peat records are compared and further integrated with archaeological local data, and together underline the marked complexity of high mountain land-use system over the Holocene period. Main phases of micro-regional land-use and landscape variability can be distinguished from the middle Neolithic to the early Bronze Age and from the Roman Period to the Modern Era. Conversely, several phases of homogeneous landscape management are distinguishable during the early Neolithic, and from the late Bronze to the late Iron Age. Results drawn from this study show that landscape variability is not necessarily connected to topographic or climatic parameters, and underline the role of social, economical and cultural parameters in the land-use organisation and the landscape shaping of high mountain spaces since Prehistory.     

A simple methodology for recording petroglyphs using low-cost digital image correlation photogrammetry and consumer-grade digital cameras

In the present study a simple method is described for obtaining 3D digital models of petroglyphs of different sizes and characteristics and its usefulness, in the study of this cultural heritage, is evaluated. For this research we used low-cost photogrammetric software and consumer-grade digital cameras, without any other surveying techniques. In order to test this methodology, three field research studies were carried out in Galicia (Spain).     

Exploitation,fascist violence and social cleansing: a study of Franco's concentration camps from a comparative perspective

One of the most noticeable topics within recent Spanish historiography is the analysis of processes of mass violence. Salient among these were the Franco concentration camps, a violent re-educational system made up of more than 180 camps, 104 of which were permanent. The camps operated from 1936 until 1947, under the control of Franco's army, with its corresponding regime of forced labour and exploitation of prisoners of war. Half a million Spaniards and Europeans experienced first hand the Spanish version of the fascist concentration-camp system. This article offers an analysis of the inside history of Franco's concentration camps and then locates them comparatively within a theoretical and empirical Fascist model of internment, exploitation and violence.     

TAX COMPETITION IN THE PRESENCE OF INTERJURISDICTIONAL EXTERNALITIES: THE CASE OF CRIME PREVENTION*

ABSTRACT The paper analyzes the effect of fiscal competition when local governments choose the level of public goods that generate spillover effects elsewhere. For instance, law enforcement activities affect both the crime level in the jurisdiction providing the good and in neighboring communities. The model shows that when local governments rely on capital taxation to finance these expenditures the spillover effects may not lead to an inefficient provision of public goods as predicted by the tax competition literature. In the model, capital is costlessly mobile and offenders relocate responding to differential criminal opportunities and differential local law enforcement efforts.     

佛韵——美的赏析（上）

佛韵——造像艺术集粹展是2013北京·中国文物国际博览会的重点项目。去年冬天,该展览在首都博物馆举办的短短20天中,展厅内从早到晚都是摩肩接踵观赏的人群。主办方举办＂佛韵—造像艺术集粹展＂旨在传播佛教的美学理念,为大众奉献出一场关于佛教造像艺术的视觉盛宴。从展品的精心挑选,到展览形式设计的独具匠心,以及展出形式的新颖别致等诸方面来看,都不失为近年来难得一见的好展览。