1,720,974 research outputs found
A METHOD FOR ASSESSING EMBANKMENT SETTLEMENT DUE TO THE WIDENING OF ROAD CROSS-SECTION
No full textA simple analytical and sufficiently approximate method has been devised for estimating the extent of maximum embankment settlement caused by cross-section road widening. For this purpose a series of numerical calculations was carried out by means of simplified approaches using traditional methods for settlement assessment. The values of the main parameters involved in the calculations were varied, which included the extent of the widening, the embankment height, the stiffness both of the subsoil as well as of the materials forming the embankment. The comparison with calculation findings made by a finite element model proved that the settlements obtained through the simplified approaches are sufficiently well approximated. Regression analyses of the results obtained with the simplified approach were developed in order to find out relationships which directly provided the values of the maximum settlement in function of the geometry of the system and of the material properties. After this, both traditional as well as innovative engineering techniques which are used for reducing consolidation settlements and their effects on the practical functionality of the infrastructure affected by the widening, were analysed. In this way a solution was devised that appears to be the most effective one, that consists in reducing the weight load on the foundation level, through the use of light materials, such as expanded clay, for the construction of the new embankment. Moreover, an assessment was made of the induced consolidation settlements, demonstrating the efficacy of the solution regarding those cases where crushed gravel or “pozzolana” is used
On the interpretation of piezocone tests in natural silt and sand mixtures
No full textThis paper presents the results of a number of variable rate piezocone tests (CPTU) carried out in the context of three independent site investigation campaigns on intermediate soil deposits. Attention is focused on the analysis of CPTU measurements in relation to the different penetration rates so as to identify drainage conditions during standard tests. Indeed, intermediate soils, typically including a large variety of mixed soil types, are generally characterized by permeability values within the range in which partial drainage is likely to occur during cone penetration and a non-identification of this effect may result in invalid CPTU-based estimates of soil parameters
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Recorded ground motion and site effects evaluation for the April 6, 2009 L’Aquila earthquake
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