Sistema Regional de Información
en línea para Revistas Científicas de América Latina,
el Caribe, España y Portugal

This article focuses on the processes of sense-making of forest fires in a Mediterranean context. The authors use a textual approach to compare media framing with activist organizational storytelling. The authors conducted a frame analysis in two major daily newspapers in Catalonia (La Vanguardia and El Periódico de Catalunya) during three summers and compared the results with the stories from four leading activist and volunteering organizations that came out of in-depth interviews with their members, one focus group and published materials. The results identified up to five major mainstream media frames, among which were stories focusing on agricultural risk, climate change and weather conditions; imprudent and negligent attitudes; inappropriate fuel management and woodland conditions; and arson. The natural self-regulatory frame was present as part of the discourse of resilience but almost residual. Some journalism focused on the spectacular nature of the events and their dramatic impact, which led to some degree of mediatization of wildfires. The organizations problematized these frames and discussed about the appropriateness of human intervention to prevent forest fires. The results also revealed that activists observed the issue from a broader complexity, replicating frames on “structural responsibility” instead of “individual responsibility” allocation. The authors point out that if wildfires are to be better understood and dealt with more in-depth knowledge is required of different stakeholders’ approaches to preventing forest fires.

The present research shows the results of an analysis of Spanish entertainment television aired in prime time between 2016 and the first semester of 2017 by the leading Spanish TV networks. The aim is to draw a comparison between immigrants and the natives in violent and health behaviours, personality traits, and also the number of conversation topics used by immigrants compared to the natives. Content research was used for this analysis, where a sample of 723 characters (n723) was taken. The final result shows there are different tendency patterns in the index of victims of violent behaviour being the native the ones with the highest score. No significant statistical differences in other indexes were observed. However, other variables are statistically related to immigrants/ foreigners, such as drug abuse, topics regarding health or politics, and furthermore, immigrants are also prone to have personality traits such as ‘unfair’, ‘seductive’ or ‘perverse’.

The paper presents the case study of pathological manifestations in concrete structures, located in the Northern Road Hub of Brasília, using the GDE / UnB methodology, which qualifies and quantifies the degradation of structural damages. The general state of the structure was characterized in order to serve as a subsidy for decision making regarding routine interventions, in order to extend the useful life of the structure. The methodological routine consists of conducting field inspections, catalog of structural pathologies with photographic survey, characterization of pathologies and classification according to the weighting factors and damage intensity factors of the structure according to the GDE / UnB methodology for special works of art, calculation and overall classification of the structure damage.

In this study, the corrosion performance of dissimilar welded joints between ASTM A615 and AISI 304 stainless steel with and without buttering using Inconel 182 was evaluated. In both cases, the filler metal was ER-309L and the base metals were prepared with a 45° single bevel. One half of the specimens were welded with “buttering” using Inconel 182. The electrochemical results showed that despite welding defects, the welded specimens formed a passive layer in alkaline environments. The specimens welded with buttering exhibited the best corrosion resistance and mechanical properties.

This research confronts the following concrete properties: water absorptions (by immersion and capillarity), electrical resistivity and compressive strength. Concrete mixtures with two types of cement were tested. Results showed that concretes with higher content of pozzolan had higher resistivity and greater absorption by capillarity, for water/cement ratios lower than 0,60. This behavior is attributed to reduced pore diameters and microstructure densification. However, for water/cement ratio of 0,60, concrete with lower content of pozzolan presented higher absorption by capillarity. It was observed that the compressive strength and the electrical resistivity behaved inversely proportional to the water/cement ratio, and the absorption by immersion and capillarity are directly proportional to the water/cement ratio. Correlations with high determination coefficients were found between tests.

Este artigo tem por objetivo apresentar a utilização datermografia infravermelha em paredes de alvenaria no auxílio do desempenho térmico. Foi realizado uma revisão sistemática através de pesquisa com busca automática e snow-balling, seleção e peneiramento dos artigos para restringir os artigos ao tema desejado. Após isto, foi estudado sobre a termografia infravermelha nas manifestações patológicas, as propriedades térmicas e seu comportamento, pontes térmicas, diferença de temperatura e infiltrações de ar. De uma forma geral é necessário ter alguns cuidados durante a execução dos experimentos e medições. Ademais foi mostrado que a termografia infravermelha é uma técnica complexa e precisa de ser utilizada.

Santa Clara de Asis Convent High Choir timber truss has been victim of humidity and attack of abiotic and biotic agents which have caused its gradual degradation. For the identification of pathological processes associated with these agents and because of its patrimonial character, a diagnosis study based on an organoleptic inspection and superficial tests was carried out with the available instruments, which allowed identifying the causes. By modeling the structure with SAP 2000 program, we obtained the results that were used to calculate the solutions proposed for the identified pathologies, mainly for the loss of connection between the wall plate and the tie rod beam.

This work aimed to develop and analyze polymeric repair mortars composed of either  vinylic copolymer, PVA (polyvinyl acetate), and or SBR (styrene-butadiene ). Tests were carried out to determine the compressive and diametral compression tensile strengths. In addition, the adhesive strength between the repair and the concrete was determined by means of a diametral compression traction test. Among the materials tested, it was noticed that the material modified by styrene-butadiene SBR hadexhibited the best performance, especially with respect to theits adhesion to the concrete. In general, the results showed that the mortars modified by the studied polymers can meet the function of a repair material

This work seeks to assess the use of reuse water from sewage treatment stations in the manufacture of simple concrete hollow blocks. The use of these blocks has been adopted as a rationalization option in the composition of the sealing and structural masonry, providing a reduction in the losses of materials and layers of coating. Made from the mixture of agglomerate, aggregate and water, around 60 m³ of concrete, required for the production of 12,350 blocks (14 x 19 x 39 cm), would consume 4, 500 l of water. The study includes the analysis of the physical and mechanical properties of effluent dosed blocks. Consequently, the results show that these properties remain unchanged, which can make the effluent use viable.

Este artículo describe propiedades referentes a la durabilidad de cinco mezclas de concreto con distintos contenidos de ceniza volante activada (CVA) y cemento portland tipo CPC 40. Los ensayos realizados fueron: velocidad de pulso ultrasónico, resistividad eléctrica aparente, permeabilidad rápida al ión cloruro y resistencia mecánica a la compresión. Los resultados indicaron que la calidad de todas las mezclas resultó durable, el desarrollo de la resistividad eléctrica y disminución del nivel de permeabilidad al ión cloruro fue favorecido por el contenido de CVA. En cuanto a las resistencias a la compresión, se notó que a mayor contenido de CVA estas resultaron menores. El porcentaje máximo de sustitución de CVA para cumplir con los criterios de durabilidad actuales resultó del 65%.