1,720,973 research outputs found
Class A Prediction of the Effects Induced by the Metro C Construction on a Preexisting Building, in Rome.
No full textObserved and predicted settlements induced by the construction of hydraulic tunnels in Buenos Aires
No full textThe paper deals with the main results of 3D numerical analyses carried out in order to simulate the tunnel construction for the real case of "Tuneles aliviadores del emisario principal del arroyo Maldonado" in Buenos Aires. Full 3D numerical analyses are also developed to study the interaction between tunneling excavation and a tall concrete building. The numerical models take into account the main features of excavation process with Tunnel Boring Machine (presence of shield, face pressure, tail void grout injection); a realistic structural model of the building is also used. Due to the very small level of deformation expected, a simply elastic perfectly plastic with Mohr Coulomb strength criterion is adopted; values of stiffness parameters are selected at very small deformation level. Soil parameters were determined by means of in situ and in lab experimental test results. Comparison between the monitoring data and numerical results shows the good forecast capacity of the geotechnical model developed and encourages utilizing of 3D analysis as a valuable tool in tunnel design in urban areas
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Prediction of the effects induced by the Metro C construction on an old masonry building
No full textThe paper reports the main results obtained through a numerical study aimed to predict the effects induced on an old masonry building by the tunnelling operations for the construction of Metro C line, in Rome. To achieve high quality of prediction, full 3D finite elements numerical analyses are carried out. The most important features simulated are: i) the advancement of tunnel front; ii) the pressure for front support; iii) the TBM geometry (weight and conicity of shield); iv) the tail void grouting; v) the building structure. A simple elastic perfectly plastic model with Mohr-Coulomb strength criterion and tension cut off is used for describing both soil and masonry behaviour. Preliminary analyses using different mesh density and tolerated error are carried out to optimize the complete analyses achieving an acceptable compromise between calculation time and accuracy of the results. In the usual range of pressure distributions for front support, the study underlines the light influence on stresses and strains distribution of the values adopted. The analysis of stress and strain distributions in the building structure before and after tunnel construction, numerically obtained, allows us to assess the category of damage in term of potential cracks induced and also in term of reduction of structural safety level
Variations on the Author
Get PDF“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
Get PDFWe 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
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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