Fighting the red peril in the Congo. Paradoxes and perspectives on an equivocal challenge to Belgium and the West (1947–1960)

A study of the Belgian fight against communism in the Congo can uncover the deeper workings of Belgian colonial ‘foreign’ policy. The principles guiding Belgium and its Western partners in their war against the ‘red threat’ give us vital clues to understanding how Belgian governance worked, and shed new light on the Congolese crisis of 1960–61. This article also gives examples of strategies and influences at play during the Cold War, and significant both for the countries developing them and for those which suffered the consequences.     

Experimental characterization of the constitutive materials composing an old masonry vaulted tunnel of the Paris subway system

A significant proportion of the Paris metro tunnels comprise a masonry vault built out of stone blocks and mortar joints, and sidewalls and slabs made of unreinforced concrete. In order to provide the necessary data for future structural evaluation, an extensive laboratory testing programme has been conducted to characterize the materials of the tunnel separately, i.e., mortar, stone, and concrete. The tests, carried out on specimens taken from cores extracted from a 1930s tunnel, enabled to determine the mechanical properties, including direct tensile, shear strength, and mode I fracture energy, as well as the properties of the stone-mortar interface. Results show that the masonry mortar joints could reach 10 cm in width, and that blocks of stone varied in composition and porosity, thus producing a wide range of mechanical properties. The concrete was composed of large-sized aggregates and showed low stiffness and strength. Based on these experimental results, ratios between mechanical characteristics are hereby proposed. Perspectives on the use of this experimental data in a finite element model are then discussed.     

Communitarian Neighborhoods and Religious Minorities in Iran: A Comparative Analysis

This paper analyzes the urban insertion of some Iranian religious minorities, focusing on three communities, all of which lived in separated neighborhoods: Armenians of Isfahan, Jews of Shiraz, and Zoroastrians of Yazd. After a discussion on the link between non-Muslims' spatial and social isolation and Iranian culture and Shiism, the paper goes on to describe the organization of these neighborhoods during the recent centuries and the recent—and contrastive—evolutions of two of them: while Zoroastrians view their quarter like a humiliating ghetto, of which they wish to go out, Armenians are proud of it, and try up till now to jealously preserve their isolation.