1,720,958 research outputs found
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
Metal Exchanged ZSM-5 Zeolite Based Catalysts for Direct Decomposition of N2O
No full textCo?Pt/ZSM-5 and Ag?Pt/ZSM-5 type catalysts
were prepared by ion exchange method followed by
calcination. These Co and Ag based catalysts, promoted by a small amount of Pt have been studied for their catalytic activity towards N2O decomposition. Both the catalysts show high catalytic activity, however, cobalt–platinum based catalyst shows relatively better activity at higher temperature. At 550 �C almost 100% conversion of N2O is achieved over Co?Pt/ZSM-5 with a maximum of
0.08479 mmole of N2O decomposed per gram of the catalyst
per unit time. These catalytic materials have been
characterized for their structure, composition, morphology
and other details, using XRD, SEM, EDX, ICP, BET techniques.
Much improved catalytic activity for the bimetallic
zeolite than the mono-metal containing compositions clearly
demonstrate the synergistic effect of these transition metals,
while high surface area of ZSM-5 is also responsible for the
improved N2O decomposition activity
Low-cost catalysts for the control of indoor CO and PM emissions from solid fuel combustion
No full textCu–Mn based mixed oxide type low-cost catalysts have been prepared in supported form using mesoporous
Al2O3, TiO2 and ZrO2 supports. These supports have been prepared by templating method using
a natural biopolymer, chitosan. The synthesized catalysts have been characterized by XRD, BET-SA, SEM,
O2–TPD and TG investigations. The catalytic activity for CO as well as PM oxidation was studied, in a
view of their possible applications in the control of emissions from solid fuel combustion of rural cookstoves.
The trend observed for the catalytic activity of the synthesized catalysts for CO oxidation was
ZrO2 > TiO2 >Al2O3 while for PM oxidation it was observed to be TiO2 > ZrO2 >Al2O3. The effect of CO2,
SO2 and H2O on CO oxidation activity was also investigated, and despite partial deactivation, the catalysts
show good CO oxidation activity. An effective regeneration treatment was attempted by heating
the partially deactivated catalysts in presence of oxygen. Redox properties of TiO2 and ZrO2 and their
structure appeared to be responsible for their promotional activity for CO and PM oxidation reactions.
These unordered mesoporous materials could be useful for such reactions where mass transfer is more
important than shape and size selectivity
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
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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