1,721,028 research outputs found
"Capital income taxation incentives during economic downturns: re-thinking theory and evidence", Cardiff Economics Working Papers E2011/15
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Analysis of reinforcement options for a partially saturated slope
No full textThe paper deals with a partially saturated natural steep slope recently failed due to rainfall. The slope response to rainfall was analyzed through advanced FEM-based seepage analysis and limit equilibrium stability analysis. Both the original configuration of the slope and a series of engineered configurations were examined. All of the remediation work options included slope reshaping, use of coarse-grained material, and installation of geogrids in different arrangements. The results of both seepage and stability analyses allowed obtaining a performance model of the slope (natural or engineered) against rainfall of different intensity-duration features and for different return periods, also taking into account different initial conditions related to the season. It was outlined the importance of unsaturated conditions, and that critical conditions for the natural slope occur for rainfall with return periods (T) not larger than 50 years and duration of 3-12 hours. Conversely, the engineered slopes perform better due to the inclusion of tensile-resistant materials like geogrids, for the presence of coarse-grained material used for slope reshaping, which also allows a better interaction of the slope with the atmosphere, globally reducing the pore water pressures in the slope and increasing the factor of safety, independent of rainfall duration-intensity
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
Integration of intensity textures and local geometry descriptors from Terrestrial Laser Scanning to map chert in outcrops
No full textThe potential of Terrestrial Laser Scanner imaging (TLS) as a tool to map chert, an amorphous variety of silica diffused in sedimentary rocks, is here discussed together with an original method for its automatic detection. Reflectance measurements in the VIS-NIR band (400-2500. nm) show that chert displays low reflectance in the IR wavelengths that are operated by several commercial TLS. To develop and test a recognition method an outcrop of limestone with chert nodules was scanned with an IR (1541. nm) TLS. The intensity information, after proper distance correction, was coupled with geometric and intensity descriptors for training Support Vector Machines (SVM) to separate vegetation from rock and limestone from chert. Results, cross inspected in the field and with reference pictures, demonstrate that TLS data can be efficiently exploited to map chert when the monochromatic information of the intensity is integrated with feature descriptors and SVM classifiers. © 2014 International Society for Photogrammetry and Remote Sensing, Inc. (ISPRS)
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
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