1,721,065 research outputs found
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
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
Seasonal Loading Impact on Performance of Solar DG for Loss Reduction Based on Capacity Factor
No full textAbstractThis paper proposed a methodology to study the seasonal impact on the performance of solar based Distributed Generator (DG) for loss reduction as a main objective. The random behavior of solar irradiance is modeled using beta probability density functions. IEEE RTS (Reliability Test System) data is used for load modeling. Different modules of solar have been studied and appropriate selection is made using capacity factor approach and VSI method is used for finding the optimum location for placement of SPV (Solar Photo Voltaic). An iterative forward backward/BIBC load flow method is used for analysis. The proposed technique has been applied to IEEE 33, IEEE 69 and IEEE 12 bus system and significant reduction of active power losses has been achieved for different seasons of the year
Impact of DG and D-STATCOM Placement on Improving the Reactive Loading Capability of Mesh Distribution System
No full textAbstractIn this paper, Distribution Generation (DG) and Distribution STATic COMpensator (D-STATCOM) are optimally placed in mesh distribution systems using sensitivity approaches. The objective of this paper is to improve the reactive loading capability of the network with maintaining voltage profile in an acceptable limit. Optimal locations of DG and D-STATCOM are determined using Voltage Stability Index and Combined Power Loss Sensitivity approaches respectively. The size of DG and D-STATCOM are determined by variational algorithm subjected to minimization of total power loss. In order to quantitatively analyze the impact of DG and D-STATCOM on voltage stability margin, Q-V curves are drawn using continuation power flow method. In this study the impact of simultaneous placement of DG and D-STATCOM is investigated separately for large industrial motor load as well as industrial load. Also, load growth scenario is considered for better planning of the system. The results are obtained on standard IEEE-33 and 69-bus mesh distribution systems to check the feasibility of proposed methodology
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
Impact of D-STATCOM Placement on Improving the Reactive Loading Capability of Unbalanced Radial Distribution System
No full textAbstractIn this paper, Distribution STATic COMpensator (D-STATCOM) are optimally placed in unbalanced radial distribution systems (UBRDS) using sensitivity approaches with an objective of improving the reactive loading capability of the network with maintaining voltage profile in an acceptable limit. Optimal locations of D-STATCOM are determined using Voltage Stability Index (VSI). Optimum size of D-STATCOM is obtained by variational algorithm subjected to minimization of total power loss. In order to quantitatively analyze the impact of D-STATCOM on voltage stability margin, Q-V curves are drawn using continuation power flow method. In this study the impact of D-STATCOM placement is investigated for large industrial load model with light, medium and high loading conditions. Also, load growth scenario is considered for better planning of the system. The results are obtained on standard 25-bus and IEEE-37 bus UBRDS to verify the practicability of proposed methodology
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
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