Damage mechanism in Tournai limestone – The case of the tomb of Admiral Tromp in the Old Church of Delft (The Netherlands)

The funeral monument of Maarten Tromp, in the Old Church of Delft (the Netherlands), is partially built with Tournai stone, a grey-blackish limestone from the Wallonia region (Belgium). This stone is suffering a severe delamination and scaling, which has, in the course of the centuries, led to a considerable material loss from the surface of some of the stone elements. In order to identify the damage process and define a sound basis for the conservation of the monument, a research plan was set-up including, next to the tests and analyses on the stone, a 1-year monitoring of the microclimate in the church and the investigation of the structure of the monument as well as its connections to the adjacent walls. First of all, the stone type was identified by macroscopic features and by thin section microscopy. The moisture distribution in the monument and in the adjacent walls was gravimetrically determined on samples taken at different height and depths. The content and type of salt in the Tournai stone from the monument were determined by X-ray diffraction and ion chromatography, and the results compared to those obtained for the fresh stone. The analyses showed the presence of considerable amount of gypsum, together with a low content of soluble salts (chlorides and nitrates). The SEM-EDS observations showed that gypsum is mainly crystallizing in cracks between the layers of the material. The damage mechanism and the influence of salt on the decay were further investigated by combining hygroscopic moisture uptake, hygric dilation (RH cycles between 50% and 95% RH) measurements and SEM-EDS observations; all measurements were performed both on stone sampled from the monument and, as comparison, on fresh stone specimens. The results show that gypsum is the main salt present, but its role in the damage is not significant. The naturally thin laminated structure of the stone together with the considerable hygric dilation seem to be the main causes of the delamination observed in this stone.     

A combination of NDT methods for the restoration of monumental façades: The case study of Monte di Pietà (Naples,Italy)

The paper focuses on an interdisciplinary research project concerning the preservation of the XVII century monumental building of Monte di Pietà in Naples, Italy. The building underwent a series of restorations being the structural walls affected by humidity and cracks. The importance of this monumental building in the historical city center of Naples led to design an extensive surveying program to provide the designers of strengthening with a detailed investigation of the geometry of the entire structure, and particularly of the entrance façade, with great details on several materials, thicknesses and restraints. A preliminary investigation was performed on the historical phases of this monumental building to have a clear knowledge of its vicissitudes, and then in situ structural assessment included 3D laser scanner techniques probing radar, in situ stress measures. This surveying phase was crucial especially for the subsequent Finite Elements modeling (F.E.M.) of the façade. The scope of the numerical refined analyses was to evaluate the state of stress in the structural elements of the façade putting in evidence structural ‘weak points’ and finally to design a retrofit intervention having a detailed map of the ‘intervention areas’. The theoretical damage assessment has been compared with on-site assessment and in situ stress measures. The damage primarily concerned the entrance façade and its valuable decorations. Furthermore, the basic principles for the design of the strengthening have been discussed.     

The war of 1870 in the pattern of Franco‐German relations

The worlds of the living and the dead might seem irrevocably cut off from one another. Nevertheless, an important strand of modern thought attempts to find some form of intelligibility emanating from the dead. Paul de Man's discussion of prosopopoeia suggests the possibility of giving voice to the dead, though this turns out to be a form of delusion inherent in language. Emmanuel Levinas, arguing against Heidegger, seeks to maintain a relationship with the other beyond death, and Giorgio Agamben tries to find meaning in the silent testimony of victims of the Holocaust. This article examines these various attempts to mediate with the dead and suggests that it may be impossible to eliminate the risk of imposing our own words on those who cannot speak. However, a readiness to be surprised by unanticipated meanings may be the necessary condition to finding signifying sources outside ourselves.     

Laser cleaning of stone artefacts: a substitute or alternative method?

Laser cleaning of ancient marble and stone monuments is nowadays a well-accepted procedure in conservation. Operators and specialists are presently divided between those giving maximum confidence to this method of cleaning and others who, in contrast, are strongly critical and emphasise possible drawbacks and damages caused by laser. As any other method of cleaning, laser also offers advantages but at the same time is limited by drawbacks. Most conveniently, it should be integrated with the other methods. On the basis of the above considerations, the authors are proposing a combined procedure using laser cleaning as a first step – in this way removing the relevant part of black gypsum encrustation – followed by chemical methods as a final step. The latter, conveniently, could be accomplished by means of anion exchange resins, better than ammonium carbonate. An experimental check-up was made of four different methods applied on three different lithotypes on the façade of the Florentine Cathedral. Laser, micro-sandblasting, ammonium carbonate and sodium EDTA were the cleaning methods compared, whilst Carrara marble, green Serpentine (Verde di Prato) and a red limestone were the three lithotypes. Results are commented by showing differences in the advantages and drawbacks among the different methods on the various lithotypes.     

Twenty-five years of democracy,twenty-five years of social protest: The role of the carnivalesque in Bulgaria’s 2013 antigovernment protests

This essay examines the role of the carnivalesque in three performances of protest during the antigovernment street protests in Bulgaria in 2013. They represent a form of protest that symbolically inverts the established rituals of a political regime unwilling to recognize the voice of the people in an allegedly democratic nation-state. My analysis intersects scholarship on the rhetoric of social movements, carnivalesque performances of protest, and the rhetorical force of iconic images of protest. Through my analysis I reveal how the carnivalesque allowed activists to move beyond the norms of democratic dissent in their protests against governmental oppression.     

In the Blink of an Eye: The Augenblick of Sudden Change and Transformative Learning in Lukács and Benjamin

Abstract

Although much work dedicated to clarifying the link between learning and change has made a sincere effort to show how change can be a part of the learning process of every individual's life, the progressive functionalist approach to understanding this link in developmental psychology has created a blind spot when it comes to a consideration of the possibilities of sudden change. Developmental approaches to understanding change are also evident in macro‐level politics, and they have increasingly become part of other spheres of social life such as education where the individualized inculcation of skills has come to define the progressive mantra of learning and telos of schooling.

Instead of remaining within the confines of liberal progressivism or functionalism that advance a notion of transformation in gradual, piecemeal, and developmental terms, change needs to be re‐conceptualised to account for the ways that learning can be a momentous, sudden, and sometimes violent event. To this end this article discusses temporal, sensory, and perceptual change through use of the concept of ‘Augenblick’ – a German term connoting a fleeting moment of time normally associated with a form of sight. Focusing on the theories of education inherent in the work of Georg Lukács and Walter Benjamin this article demonstrates how micro‐ and macro‐ forms of expressions of the Augenblick occurring at not only the individual, but also the social level in the context of revolutionary politics force us to rethink the ways that the dominance of liberal conceptions of learning prefigure the horizon of the possibility of change.     

The war of the words: The rhetoric of ‘Operation Iraqi Freedom’ (an informal survey)

The political, military and media rhetoric of the March–April 2003 invasion of Iraq is interpreted as a phenomenon of power in relation to an understanding of culture as a site of denegation. Patterns of tautology, euphemism and equivocation are identified and their rhetorical appeal analysed in terms of the denegational structure of each of these figures. The essay is thus governed by an understanding of figuration as instrumental, not ornamental; it shows how rhetoric can be studied as a cultural phenomenon and argues by example that a pragmatics of troping is crucial to such a study.     

Institutional Expansion and Scientific Development in the Periphery: The Structural Heterogeneity of Argentina’s Academic Field

The relationship between “marginal” and “mainstream” science has, in recent decades, become a matter of discussion. Traditional perspectives must be reexamined in the wake of transformations in the international circulation of knowledge and the subsequent diversification of scientific “peripherality”. Argentina represents an interesting case with which to explore the structure of “peripheral centres” and new forms of scientific development. While it has recently experienced an expansion in terms of institutionalization, professionalization, and internationalization, that process has been coupled with entrenchment of existing institutional asymmetries and persistent intra-national inequalities; academic prestige is distributed according to opposite principles of legitimation (local/international). Our main task is to explore the current state of research capacities pursuant to that expansion in order to analyze the diverse styles in which knowledge is produced. In our analysis, we make critical use of Bourdieu’s concept of field and the Latin American category of “structural heterogeneity,” while also focusing on the question of circulation. The paper outlines how professionalization has developed locally over time, and the historical tension between the National Council for Scientific and Technical Research and the public universities. It describes the current structure of the scientific field in terms of researchers, institutes, publishing circuits, and institutional evaluative cultures. It focuses on geographical asymmetries in order to assess the distribution of new human and material resources throughout the country. Finally, it addresses the current situation under the new government, and raises concern over recent regressive actions.     

Assessment of seismic vulnerability of art objects: The “Galleria dei Prigioni” sculptures at the Accademia Gallery in Florence

The seismic assessment of art objects requires a multidisciplinary approach and the definition of a specific methodology for evaluating the level of safety and the possible interventions necessary for seismic risk prevention, finding a compromise between safety and conservation. This paper describes a first step in this direction, in which the different aspects of the procedure, from knowledge path of the art object to the structural analysis, were studied in the six Michelangelo's statues located in the “Galleria dei Prigioni” (Slaves’ Gallery) at the Accademia Gallery of Florence. We showed that the general principles and criteria expressed in the “Italian Guidelines for evaluation and mitigation of seismic-risk to cultural heritage”, which are specifically devoted to masonry constructions, could be profitably extended to other artworks, like statues, starting from historical research, geometrical survey and material characterization, up to the developing of specific methods of analysis. This research could be the base for future studies to be performed concerning the prevention of seismic damage of art objects, including both bare minimum interventions and specific devices, such as isolation systems.     

Evolution of the Apollo-Soyuz Test Project: The Effects of the “Third” on the Interplay Between Cooperation and Competition

Minerva - The paper investigates the evolution of the first manned international space mission – a rendezvous and docking between a US and a Soviet spacecraft in 1975 known as the...