1,720,973 research outputs found
Past and current stress conditions of temple G1 in My So'n, Vietnam
No full textThe work describes a survey of one of the Hindu temples of the monumental area of My Son in central Vietnam, named G1 by Parmentier at the beginning of the XX century. Also, the paper illustrates the results of numerical analyses of the temple both at its current state and at its presumed original conditions. The temple is in a rather bad state, as most of the vaults were already collapsed at the time of Parmentier’s expedition, and further on destroyed during the Vietnam War. Numerical analyses were carried out to evaluate the presumable stress conditions of the still intact temple and determine whether or not the self-weight alone might be the cause for the partial collapse. Also, the current stress conditions were determined, to avert any further possibility of failure. The numerical models take the layered nature of masonry into account. The masonry leaves were supposed to be either perfectly connected or independent, the last one being the less conservative assumption
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
Developing masonry vault models for global assessment
No full textThe development of a model for a masonry vault involves a complex series of interrelated decisions on geometry, modeling, material selection, meshing, and boundary conditions. It is necessary from the outset to decide the level of simplification that will be applied to the actual geometry of the structure. This decision takes account of the information desired from the model, the quantity and accuracy of the geometric information available. The use of shell or solid elements dictates both the constraints on meshing the model and the subsequent performance of the model. The boundary conditions are both critical to the results of the model and extremely difficult to assess. In this article, we present the process of working from a large amount of survey information to develop first a viable geometrical model, then the process of meshing used to make this into a working finite element model, and finally the process of using field-acquired vibration data to update the model as necessary
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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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
Numerical interpretation of the experimental results obtained with flat-jack tests on a brick masonry wall
No full textFour numerical simulations of the double flat-jack test on a historic brick masonry wall,
using a finite element code, are presented. The aim is to show which of the simulations best
fit the experimental results, achieved measuring the strain distribution in the area between the
two flat-jacks and also in the area above the upper flat-jack.
The numerical and experimental results allow to compare: i) which is the strain
distribution induced by the flat-jacks during the test; ii) which are the main directions of the
local compressive and tensile stresses leading to cracks; iii) which of the chosen numerical
simulations gives the best fit. Finally, these results show which is the volume of the masonry
wall really involved in the test
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