Search results for "CONSTRUCTION"
showing 10 items of 2670 documents
Sea Surface Temperatures and Paleoenvironmental Variability in the Central Mediterranean During Historical Times Reconstructed Using Planktonic Foram…
2019
The ongoing anthropogenic‐induced warming assessment requires a robust background from regional sea surface temperature (SST) reconstructions. Planktonic foraminifera have yielded valuable insights into late Quaternary SST dynamics, but the techniques to estimate SST from fossil assemblages have only rarely been used in very recent sedimentary records (the last 2,000 years). Here we use two transfer function methods, modern analog technique and artificial neural networks, to reconstruct SST variability in two cores from the Central Mediterranean Sea that span the last five centuries. Both cores show similar and considerable changes in the planktonic foraminifera assemblages. However, the in…
Corporate governance and its implications for sustainability reporting quality in Latin American business groups
2020
Abstract This paper aims to study the factors determining the quality of sustainability reporting in Latin American business groups. Applying a logistic regression model, this study is pioneer in establishing how some distinct corporate variables of business groups influence disclosure quality of Corporate Social Responsibility practices in these groups in emerging economies. The results show that control concentration in the groups negatively affects the quality of sustainability reporting. Variables such as foreign ownership, the age of the business group and board size help business groups to improve the quality of their sustainability and voluntary disclosure practices. These results fo…
Development of a Model to Estimate the Risk of Emission of Greenhouse Gases from Forest Fires
2022
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The Making of the Ordinary Child in Preschool
2011
The article examines parent-teacher conferences in Finnish and Swedish preschools. Previous research has shown that the conferences are mostly about the evaluation of the child. Based on qualitative data, the article studies how this evaluation is done. It asks how the institutional order regarding children is constructed in parent-teacher conferences and what the ordinary child is like that this order presumes. The theoretical framework is adopted from social constructionist research on childhood and institutions. The analysis applies a discourse analytic framework. The results suggest that being and becoming social is the key expectation for a child in Finnish and Swedish preschools; form…
Catalytic hydrothermal liquefaction of municipal sludge assisted by formic acid for the production of next-generation fuels
2021
Abstract Hydrothermal liquefaction (HTL) of municipal sludge (MS) was studied at 325 °C and 30 min at 10 and 30% w/w concentration of MS using formic acid (FA) as a green liquid hydrogen donor both in the absence and in the presence of heterogeneous catalysts. Pellets of commercial NiMo/Al2O3, CoMo/Al2O3 and felt of activated carbon ACF 1600 were used as catalysts. The addition of FA at high MS loading allowed to increase the yields in BC from 41 to 62% and its H/C ratio from 1.80 to 2.01 leading to energy recovery (ER) higher than 100%.When heterogeneous catalysts were used together with FA, a marked improvement of BC yields and quality was obtained at 10% MS loading. This behavior was not…
Masonry structures: A proposal of analytical generation of fragility functions for tsunami impact – Application to the Mediterranean coasts
2021
Abstract Evaluation of tsunami vulnerability of coastal buildings is gaining high interest in recent years in the areas with high tsunami hazard. Fragility evaluation is a fundamental step to obtain a quantitative estimation of the probability of building damage and in order to define possible strategies for risk mitigation. Several empirical fragility curves are available for masonry structures. However, an empirical fragility curve is generally based on field surveys after tsunami events, not always available. Conversely, analytical fragility curves are based on prediction approaches. In this paper, a proposal for the evaluation of analytical fragility curves for masonry structures typica…
On the shell structure and geometry of monovalent metal clusters
1991
The Huckel model is used to study the electronic structure of monovalent metal clusters. In an fcc cluster the Huckel model gives an estimate to the electronic structure of a free electron cluster. It is shown that the surface faceting of the fcc cluster can destroy the electronic shell structure already when the cluster has about 100 electrons. In the Huckel model the icosahedral structure has smaller total energy than the fcc structures, from which the Wulff construction has the smallest energy already when the cluster has 600 atoms.
Superstrade urbane. Dall’alta velocità alle trasformazioni contemporanee
2013
This article focuses on urban freeway deconstruction processes that recognize this infrastructure as a resource to be reclaimed for urban regeneration. Since they first appeared, freeways have been more than simple carriers of traffic flow. Following the suggestions provided by Le Corbusier, Drexler and Rudofsky in their “ROADS” exhibition, Lawrence Halprin, Reyner Banham, particular attention is paid to the shift towards a larger set of aesthetic assumptions applied to highways. Fifty years after the iconic evocation of Autopia, urban freeways no longer embody the modern value of speed: they must increasingly deal with ecological challenges and re-cycling processes. The nodes where infrast…
Graphic proposal for the great hall of the Palace of the Counts of Oliva
2021
[EN] The now-demolished Palace of the Counts of Oliva, in the province of Valencia (Spain), was an outstanding example of late Gothic and early Renaissance architecture and art. Its great hall was particularly impressive, with rich, complex decoration that constituted a cultural milestone linked recently to the ‘Germanías’, or Brotherhoods. Through research conducted in image and document collections, a graphic reproduction of the room has been produced, with special emphasis on its frieze. The procedures and techniques used in this process are examined here, before a final contemplation of the possible uses for these results.
Textureless macula swelling detection with multiple retinal fundus images
2011
Retinal fundus images acquired with nonmydriatic digital fundus cameras are versatile tools for the diagnosis of various retinal diseases. Because of the ease of use of newer camera models and their relatively low cost, these cameras can be employed by operators with limited training for telemedicine or point-of-care (PoC) applications. We propose a novel technique that uses uncalibrated multiple-view fundus images to analyze the swelling of the macula. This innovation enables the detection and quantitative measurement of swollen areas by remote ophthalmologists. This capability is not available with a single image and prone to error with stereo fundus cameras. We also present automatic alg…