Reaction to Fire of Existing Timber Elements Protected With Fire Retardant Treatments: Experimental Assessment

Fire safety is an important issue of building safety, especially when the building’s fire load contents enhance the risks of fire deflagration. When existing timber structures are involved, the most usual way to improve its reaction to fire is to treat wood with fire retardants. This study focuses on the surface protection of existing timber roof structures against fire, through the use of fire retardant (FR) treatments applied on site. An experimental investigation was carried out to study the effect of FR treatments on timber reaction to fire, with a special emphasis on timber members with biological deterioration and previously treated with preservative products. The behaviour and effectiveness of intumescent and non-intumescent treatments was also investigated. The study showed that the application of FR treatments improved the reaction to fire of timber, even in the presence of previous preservative treatments. However, the choice of the specific FR treatment should take into account the substrate conditions. In addition, test results suggest that protection systems involving multi layers (intumescent and non-intumescent) with different functioning modes each are likely to have a good global performance on the protection of timber elements against fire.     

Cultural networks between Portugal and Brazil: a postcolonial review

This paper aims to study notable examples of transatlantic transmissions of norms, beliefs and values that have revised the sense of a Luso-Brazilian community in a global world. The so-called Atlantic Civilization understood before as essentially Anglo-Saxon, takes a new shape when seen by the South Atlantic. If the historical relationship between Portugal and Brazil was one of colonial containment, since the nineteenth century those bilateral relations have passed through a process of reconciliation and networking – first through a mutual acceptance, then through the establishment of common international goals. On the one hand, this networking between Portugal and Brazil has occurred through public symbolic demonstration and the commemoration of a common culture; on the other hand, this networking has evolved through cultural connections – music, literature, and cinema, – all of which serve to validate a postcolonial review. Cultural connections that have survived the proverbial test of time have proven to be valuable in assessing the evolving relationship between Portugal and Brazil. Therefore, the Brazilian conscientiousness of its importance in the regional and world sphere involved the preparation of a Brazilian cultural diplomacy that recognized the political desire of diplomacy between Portugal and Brazil – a diplomacy that is largely demonstrative of the importance of soft power in a world of global networks.     

«Une mission glorieuse et profitable» réforme missionnaire et économie sucrière dans la province jésuite du Brésil au début du XVIIe siècle

At the beginning of the seventeenth century, the Jesuit province of Brazil is affected by tensions which reveal the complexity of its relation both with the colonial society and with the Roman center of the order. The paper is focused on an exceptional and original document about which nothing is clearly identified (author, date), theAdvertências para a província do Brasil. It allows a precise analysis of the missionary enterprise, as an economico-political experience (the Jesuits become one of the most important sugar producers of the country), and as a spiritual experience (through the salvation of the missionaries and the conversion of the Indians). This document is centered on thealdeia which is described as the main structure for the action of the Jesuits in Brazil. In that way, it reveals a global vision of the mission, geopolitical, economical and religious, which has systematically been overshadowed by the traditional historiography, whose approach of the missionary phenomenon was exclusively spiritual.     

An Ancient and Common Tradition: Funerary Rituals and Society in Equatorial Guinea (First–Twelfth Centuries ad)

In this article, we present the results of the 2011 field season at the Iron Age burial site of Nandá, on the Island of Corisco, located between Equatorial Guinea and Gabon. The excavations followed a survey conducted in 2009, which evinced the extraordinary interest of the site and suggested its funerary nature. The excavations documented three levels of occupation belonging to two different phases, which are known in the region as Oveng (ad 1–600) and Group II (ad 600–1100). The first phase was characterized by secondary burials with rich metallic offerings, which were sealed by a settlement at the end of the period; the second phase witnessed the establishment of a large burial site with primary interments. Similar burials are known from Cameroon and Gabon, but the number of features identified at Nandá and the funerary sequence are quite unique in the region. Here, the evidence will be interpreted in light of Jan Vansina’s theories, where he postulates a common political tradition in Equatorial Africa from which later developments stem.     

Cajal's Views on the Nobel Prize for Physiology and Medicine (October 1904)

In this report we present and discuss an unpublished letter written by Santiago Ramón y Cajal in October 1904 in relation to his possible nomination for the Nobel Prize for Physiology and Medicine. This letter shows that Cajal was aware of his previous nominations for the Prize. He was convinced that these nominations had not been successful because neither anatomy nor histology were among the sciences included in the Nobel Statutes' definition of Physiology or Medicine. He gives a list of the merits he thought might be used for a new nomination, which included only works concluded during the previous five years.     

Comparison of Nonlinear Static Methods for the Seismic Assessment of Plan Irregular Frame Buildings with Non Seismic Details

The use of Nonlinear Static Procedures (NSPs) for the seismic assessment of plan irregular buildings is challenging. The most common pushover-based approaches have led to adequate results in regular buildings, and hence, there is a need to verify the validity of such methods on the assessment of irregular structures. In this article, four commonly used nonlinear static procedures (CSM, N2, MPA, ACSM) are applied on the assessment of two existing five- and eight-story plan-asymmetric buildings in Turkey. The accuracy of the different NSPs is evaluated through comparisons with the results derived from nonlinear dynamic analyses. The results are presented in terms of interstory drifts, normalized top displacements, lateral displacement profiles, chord rotations, base shear, and top displacement ratios. The performance of such procedures in evaluating the damage limitation according to the Eurocode8 is also verified. Special attention is given to the ACSM (Adaptive Capacity Spectrum Method) whose performance in 3D plan irregular buildings has recently been tested. Conclusions about the performance of each NSP are outlined at the end of the article.     

Wavelet-Based Damage Detection in Reinforced Concrete Structures Subjected to Seismic Excitations

The feasibility of using output-only model-free wavelet-based techniques for damage detection in reinforced concrete structures subjected to seismic loads is explored through the analysis of the results of a full scale shake table test of a reinforced concrete bridge column recently performed at the NEES Large High Performance Outdoor Shake Table. The evaluated approaches are based solely in the analysis of the acceleration time histories recorded in the structure. The viability of using numerical models to validate this type of damage detection methodologies is also evaluated. Wavelet analyses were capable of identifying the rebar fracture episodes and partially identified the frequency shifts in the structure as the inelastic demand increased. It was also found that, depending on the methodology employed, the use of numerical models to validate damage detection techniques can oversimplify the actual problem and/or induce spurious irregularities.     

El comercio de libros entre Europa y América en la Sevilla del siglo XVI: Impresores,libreros y mercaderes

Este artículo estudia la importancia de la Sevilla del siglo XVI como el centro del comercio de libros entre Europa y la América hispana. Uno de sus objetivos consiste en poner de manifiesto el papel que desempeñaron los grandes libreros, impresores y mercaderes de las principales plazas tipográficas del Viejo continente en la Carrera de Indias; sobre todo los flamencos, italianos y franceses. Estos mercaderes fueron los que abastecían a España y el Nuevo Mundo de libros cultos y profesionales en latín. Mientras que los peninsulares solían ser sus intermediarios en los negocios atlánticos y, a lo sumo, satisfacían de demanda americana de libros en romance, baratos y de alta popularidad. En definitiva, Sevilla y el libro fueron dos protagonistas esenciales de aquella era primera de la globalización económica-cultural.     

Shooting out the slate: working with flaked arrowheads made on thin-layered rocks

Although there are many archaeological and ethnographic evidences for the use of slate and similar rocks for flaking purpose, they raised little interest among specialists, leading to a general ignorance of specific problems associated with these raw materials. Starting from the study of several Neolithic and Chalcolithic slate collections of the Western Iberia, the mechanical properties of slate and its impact on knapping process has been defined; subsequently, manufacturing and use of slate and phyllite projectiles have been undertaken. The results show that the ease with which these materials break into sheets of uniform thickness and morphology would provide an ideal basis for a fast and easy manufacture of arrowheads. In addition, these projectiles have shown a penetration capability and resistance statistically equivalent to those made on more standard materials (i.e. chalcedony or rock crystal). Therefore, slate and other rocks with a high degree of fissility would have been very attractive to prehistoric knappers endeavouring to make arrowheads.     

The use of forest resources in central Iberia during the Late Iron Age. Insights from the wood charcoal analysis of Pintia,a Vaccaean oppidum

Charred woods may be used to effectively reconstruct past wood acquisition strategies. We used anthracological data from the pre-Roman settlement of Pintia (Padilla de Duero, Valladolid) to examine the use of forest resources at the local scale. Palaeoecological data revealed heterogeneous landscapes in the inland northern meseta with environments that offered diverse sources of wood for the inhabitants of Pintia, one of the first cities of inland Iberia. Pines (Pinus pinea/pinaster and Pinus sylvestris/nigra) and both evergreen and deciduous Quercus L. and Juniperus L. were the main taxa identified as both fuelwood and construction elements, but the assemblages and frequencies of these taxa differed depending on their use. We also examined the potential of models from human ecology by considering the frequency, handling time and the relative technological value of each taxon to model how people gathered wood resources. The results suggest that although local availability affected the forest resources that were used by the Vaccaei people, specific taxa were positively selected for specific uses.