1,720,973 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
Self-assembly of colloidal nanoscale particles: fabrication, properties and applications
No full textSelf-assembly is a spontaneous process by which molecules to macroscopic entities assembled into one-, two- and three-dimensional ordered array. Even though, much attention has been focused on molecular self-assembly, numerous fascinating applications of self-assembling processes can be found at nanoscale to microscale level. Well-defined ordered structures prepared through the self-assembly of colloidal nanoscale to microscale particles, provide new opportunities for optimizing, tuning and/or enhancing the properties and performance of the materials. In this review, we have provided a concise and comprehensive account of the latest research and development activities in the fabrication, properties and applications of self-assembled structures from colloidal building blocks of various metals, semiconductors, oxides and polymers. The applicability, limitations and potential of different self-assembly techniques are also discussed
Influence of Mn doping on structural and vibrational properties of self-assembled Mn doped ZnO nanocrystals
No full textNanocrystallites (15-25 nm) of Mn doped ZnO prepared by refluxing their acetate precursors in the presence of diethylene glycol, self-assemble into polydisperse spheres of broad size distributation (100-400 nm). The center of X-ray diffraction peaks shifts towards lower angle and the line gets broadened on increasing Mn concentration. Compared to the vibration modes of wurtzite ZnO, one additional vibration mode is observed in the range of 522-518 cm(-1) in Raman spectra of Mn doped ZnO whose intensity increases on increasing the Mn concentration. The origin of this peak could be related to the incorporation of Mn(2+) in Zn(2+) lattice site. Further, on increasing Mn concentration, infrared band red shifted and surface phonon mode absorption get pronounced due to the incorporation of Mn(2+) in Zn(2+) lattice site resulting changes in the local structure parameters (effective mass, force constant, bond length)
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
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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