Isotopic Composition of Lead in Copper Ores and a Copper Artefact from the La Profunda Mine (León,Spain)

This paper continues the characterization of the lead isotopic fingerprint of ancient copper mines in the north‐west of Spain. In this work, the lead isotopic compositions found in copper ores from the La Profunda mine are presented. Azurites and malachites sampled from this deposit were subjected to lead isotope analysis by multicollector ICP–MS. The results showed a clear radiogenic lead signature compatible with the presence of uranium‐rich minerals (such as zeunerite) in the same mining complex. Moreover, a rare copper artefact, found in the galleries of the mine during its modern exploitation, was also analysed and showed that local mineral was used for its manufacturing.     

Identification of Employment Concentration Areas

This article presents a method to identify “Absolute and Relative Employment Concentration (AREC) areas” for a particular industry. Two novel characteristics of the method are that it simultaneously analyses AREC, and that it combines spatial concentration per area with the spatial concentration in neighbouring areas. The method is easy to understand and apply. It is developed to assist regional policy makers and corporate decision-makers with their investment decisions related to new infrastructure or plants. The identification of concentration areas also allows for analysing the performance of these areas in relation to characteristics such as infrastructure availability and the housing and labour market. This can yield new academic insights that are relevant for regional planners. An application of the newly developed method to five industries in a Dutch province subdivided into 502 areas illustrates the value of the method in comparison to other methods.     

Philosophy as a cultural resource and medium of reflection for Hermann Weyl

In a talk given at Zurich in the late 1940s, Hermann Weyl discussed Ferdinand Gonseth's dialectical epistemology and considered it as being restricted too strictly to aspects of historical change. His experiences with post-Kantian dialectical philosophy, in particular Johann Gottlieb Fichte's derivation of the concept of space and matter, had been a stronger dialectical background for his own 1918 studies in purely infinitesimal geometry and the early geometrically unified field theory of matter (extending the Mie-Hilbert program). Although now Weyl distantiated himself from the speculative features of his youthful philosophizing and in particular from his earlier enthusiasm for Fichte, he again had deep doubts as to the cultural foundations of modern mathematical sciences and its role in material culture of high modernity. For Weyl, philosophical «reflection» was a cultural necessity he now turned towards Karl Jaspers' and Martin Heidegger's existentialism to find deeper grounds, similar to his turn towards Fichte's philosophy after World War I. The discussion in the late 1940s can be read as a kind of post-World-War-II «Nachtrag» to Weyl's more widely known philosophical comments on mathematics and the natural sciences published in the middle of the 1920s.     

Use of robust methods to determine quadratic surfaces: application to heritage

3D surveys of archaeological elements and the construction of virtual models enable us to reconstruct historical sites. They provide useful data to select specific building processes.Photogrammetry and Terrestrial Laser Scanning (TLS) are the most common techniques to obtain synthetically heritage models. These techniques provide massive data which can only be managed by replacing them by primitive shapes, thereby obtaining more simple models and the explicit geometry of the element. Statistical and robust methods are used for this substitution, thereby avoiding the common errors due to measuring. Of these methods, the most widely used are the least-median-of-squares (LMedS) and the RANSAC method.Another computation method consists in recursive processes based on evolutive-type algorithms to adjust the model to the data captured.This paper describes two surface computation methodologies to determine the modelling of a column shaft located in temple G of the archaeological park of Selinunte (Sicily).     

Towards a three-dimensional cost-effective registration of the archaeological heritage

Archaeological practice within the European context of heritage management is facing huge challenges in ways of recording and reproduction of ex-situ preserved sites. As a consequence of the Valletta-treaty, numbers of archived images and drawings of excavated structures as prime sources of past human activity, are exponentially growing. Contrarily to portable remains however, their future study and revision is biased by the two-dimensional character of the recorded data, rendering difficult their future reconstruction for new study or public dissemination. A more realistic three-dimensional (3D) way of recording and archiving should be pursued. In this paper the possibilities for 3D registration of archaeological features are examined in a computer vision-based approach using the PhotoScan software package (Agisoft LCC). It proved to be a scientific and cost-effective improvement compared to traditional documentation methods. Advantages can be found in the high accuracy and straightforwardness of the methodology. The extraction of an orthophoto or a Digital Terrain Model from the 3D model makes it feasible to integrate detailed and accurate information into the digital archaeological excavation plan. The visual character of 3D surface modeling offers enhanced output-possibilities allowing a better documentation of in-situ structures for future research and a higher public participation and awareness for the archaeological heritage.     

Conflicting images of the Zuider Zee around 1900: nation-building and the struggle against water

In 1918, the Dutch government decided to enclose and reclaim the Zuider Zee (later called the IJsselmeer). The preceding decades had been marked by broad public debate about the utility and urgency of the project. Around 1900, its proponents constructed images of the region and of the Dutch nation in which the Zuider Zee was no longer a crossroads. They emphasized the backwardness of the area and depicted the sea as a domestic enemy, its violent storms posing a threat to the nation. Cornelis Lely’s Zuider Zee proposal (1891) promised a bright future for both the region and the Netherlands as a whole. The struggle against the water would revitalize the nation (by stimulating nation-building) and modernize its international image (perceived as a picturesque but archaic country). Opponents of the project feared the high costs and developed a counter-image: the Zuider Zee region as heartland of ‘authentic’ Dutch culture, a heritage that would be jeopardized by the project. The article concludes by highlighting the synchronicity of the non-synchronous: the Zuider Zee region was envisioned as a region living in the past, thereby constituting an ‘internal Other’ in a country undergoing rapid modernization around 1900.     

Pour une sociologie de la société transnationale

Proposing a general framework for the study of the emerging transnational society, the article critically surveys predominant disciplinary perspectives in this field, and outlines an approach based on a core/periphery model with oligopolistic competition. Within this general framework, sociology finds its specific subject in the ties that connect human beings across national borders, directly or mediated by transnational institutions. An elaborated and amended version of this approach is illustrated, among others, by the dynamics of cultural globalization and the «world language system».     

Book reviews

Converging Cultures: Art and Identity in Spanish America. Edited by DIANA FANE. Brooklyn: Brooklyn Museum, 1996. Pp. 320.

New World Orders: Casta Painting and Colonial Latin America. By ILONA KATZEW, Curator. New York: Americas Society Art Gallery, 1996. Pp. 144.

Iglesia, Estado y economía. Sighs XVI al XIX. Edited by MARIA DEL PILAR MARTINEZ LOPEZ‐CANO. Mexico: UNAM/Instituto José María Luis Mora, 1995 Pp. 314.

El crédito a largo plazo en el siglo XVI. Ciudad de México (1550–1620). By MARIA DEL PILAR MARTINEZ LOPEZ‐CANO. Mexico: UNAM, 1995. Pp. 208.

The Darker Side of the Renaissance: Literacy, Territoriality, and Colonization. By WALTER D. MIGNOLO. Ann Arbor: The University of Michigan Press, 1995. Pp. xxii, 426.

Entre la retórica y la insurgencia: las ideas y los movimientos sociales en los Andes, Siglo XVIII. Compilado por CHARLES WALKER. Cuzco: Centra “Bartolomé de Las Casas”, 1996. Pp. 362.

Saberes andinos. Ciencia y tecnología en Bolivia, Ecuador y Perú. Editado por MARCOS CUETO. Lima: Instituto de Estudios Peruanos, 1995. Pp. 215.