1,720,996 research outputs found
An Interview with Sharan Kumar Limbale
No full textSharan Kumar Limbale is an Indian Dalit activist, writer and literary critic. He has more than 40 books to his credit and is best known for his highly acclaimed autobiographical work Akkarmashi (The Outcaste). Limbale’s critical work Towards an Aesthetics of Dalit Literature is considered to be one of the seminal works on Dalit Literature.</jats:p
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
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
2D and 3D rock slope stability assessment using Limit Equilibrium Method incorporating photogrammetry technique
No full textAdvancements in technology have made it possible for acquisition and analysis of geological structure data in a short time, cheaper and safer than traditional method. Engineer sometimes failed to model the actual slope geometry due to the factor of accessibility and carry out those measurements at site. But with the aid of UAV photogrammetry technique, they can easily export the 3D model into any slope stability assessment software to perform the analysis. Photogrammetry is a technique used for rock slope assessment. Recent progression in modern UAV technologies such as photogrammetry technique using georeferenced UAV imagery allow us to obtain accurate surface profile including detailed slope information for the three-dimensional stability analysis. These techniques also mitigate the risks at site associated with conventional method. Large number of three dimensional coordinates in the form of dense cloud point can be extracted from only a few images. Dense cloud point imported to the Rocscience Slide version 2018 and Slide 3 version 2017 which is a 2D and 3D limit equilibrium slope stability software that evaluates the factor of safety (FoS) of circular or non-circular failure surfaces of soil or rock slopes. The rock slope parameters are obtained via laboratory test and rock database in Rocscience RocData were used in the assessment. Probabilistic method is performed to compute the 2D slope stability according to the normal distribution of the rock parameters on the global minimum slip surface. FoS of slope analysed by probabilistic method is 0.336 for least and 0.596 for mean FoS. Deterministic analysis is carried out to compute the 3D slope stability and the outcome are global minimum slip surface and the FoS of the entire rock slope. FoS of the rock slope without anisotropic plane is 1.960 and with anisotropic plane is 0.908. Thus, the use UAV to acquire 2D and 3D model of the rock slope is possible and stability analysis can be carried out to generate FoS of the slope as preliminary characterization
Integration of UAV photogrammetry and kinematic analysis for rock slope stability assessment
No full textRock slope excavation is unpreventable due to some location of infrastructure development must cut through rock hills. Therefore, an appropriate rock slope characterization should be carried out in order to prevent any possible failure. Recent advancement of drone technology has enabled the preliminary assessment on geotechnical characterization to be done in a short period of time. This paper mainly focuses on extraction of orientation and discontinuity features from drone imagery through the application of photogrammetry for rock slope stability assessment. Kinematic analysis is a method used to analyze the various modes of potential rock slope failures such as planar sliding, wedge sliding and flexural toppling that occur due to the presence of unfavorable oriented discontinuities. A drone was used to capture images from aerial and sideways, then imported to photogrammetry software to be processed. The output of the photogrammetry which is the dense cloud point would then be imported into a cloud compare software for the kinematic analysis. The orientations of discontinuities that has been extracted from the rock slope using CloudCompare software was imported into Rocscience Dips Version 7.0 software. The kinematic analysis feature of this software provides a quick check for various rock slope stability failure modes on a stereonet plot, such as planar sliding, wedge sliding and flexural toppling with just input on slope orientation, friction angle and lateral limits, before selecting the failure modes. By using discontinuity data, the kinematic analysis shows that the rock slope has 15.40% risk for planar sliding, 7.16% for wedge sliding and 1.33% for flexural toppling. Hence, the use of UAV as a tool in rock slope characterization is reliable because it can provide valuable preliminary information on rock slope stability assessment
Photogrammetry approach on geological plane extraction using CloudCompare FACET plugin and scanline survey
No full textPhotogrammetry advancement in the field of geotechnics is able to provide useful preliminary data in a short time and with minimum resources. The data acquisition for photogrammetry processing was done utilizing the imagery from a low-cost unmanned aerial vehicle (UAV). Commercial drone by DJI, Phantom 4 Pro was used to take aerial and side images of the rock slope. Good overlapping of the images is very important to generate a very dense 3D model. Ground control point was established to georeferenced the output of photogrammetry, so that it represents the real site scale and coordinates. Photogrammetry using structure from motion technique (SfM) is able to generate three-dimensional model of the specified study area. 3-D model of the rock slope was analyzed to extract the geological planes using CloudCompare software with the aid of FACET plugin. 3-D dense cloud point generated from the photogrammetry process was the input file to the CloudCompare software. Traditional method of using scan line survey was carried out to check the adequacy of the geological plane extraction data from photogrammetry survey output. Extraction of geological planes through FACET plugin provides information on major discontinuity sets and the orientation of the planes. Then, the dip/dip direction obtained was compared with scanline survey. The discontinuity datasets obtained from the CloudCompare was compared with the scan line survey. Results showed the difference is not more than 20 %. Therefore, application of photogrammetry through CloudCompare software provides reliable and accurate measurement
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