1,721,117 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
Evaluating the potential of MesoporousTiO2/ NiFe2O4 nano composite integrated on polydimethylsiloxane sponge for degradation of Methyl Orange
No full textThis investigation presents an easy-to-implement fabrication process of a flexible sponge composite from polydimethylsiloxane (PDMS) decorated with mesoporous titanium dioxide (MTiO2)/nickel ferrite (NiFe2O4) as a novel photocatalyst system. A sacrificial template was used to fabricate a permeable PDMS structure with pores size varied from 10 to 150 mu m. A solution containing different concentrations of MTiO2/ NiFe2O4 is used to decorate the surface and slits walls of porous PDMS. FTIR analysis indicated that the Ti-O-Si bonds are the dominant interaction between PDMS and MTiO2/ NiFe2O4. Furthermore, Ultimate Tensile Strength (UTS), SEM/EDS, HRTEM, diffuse reflectance spectroscopy (DRS), and vibrating sample magnetometer (VSM) analysis were performed to evaluate the PDMS incorporated Nano composite. In order to optimize the photocatalytic properties of PDMS-MTiO2/ NiFe2O4 composite, the dispersion of different MTiO2/ NiFe2O4 mass ratios in PDMS sponge is examined. The discoloration of contaminated methyl orange (MO) on sponge composite under solar simulated irradiation indicates the fast degradation of MO on PDMS-MTiO2/ NiFe2O4 (70:30). The surface morphology, roughness, and wettability evaluation of composites revealed the active surface insertion of nanoparticles. The photocatalytic degradation mechanism was indirectly studied using scavengers to determine the OH center dot,h(vb)(+) , e(cb)(-) , and O-2(& sdot;-) progressive species. The advantages of combining MTiO2/ NiFe2O4 Nano catalyst with porous PDMS structure would offer a facile separation of catalyst from contaminant. The recyclability indicates the promising applications of these composites for efficient wastewater treatment
Synthesis of Ag/NiFe2O4 doped multiwalled carbon nanotube for antibiotic removal from water
No full textAntibiotics impose severe impacts on humans and the ambient water environment by creating antimicrobial resistance in bacterial pathogens; therefore, there exists an urgent need to develop sustainable and efficient adsorbents for the removal of these contaminants from the water. To this goal, silver/nickel ferrite-doped multiwalled carbon nanotubes (Ag/NiFe2O4 doped MWCNTs) were prepared as functional integrated adsorbent material for antibiotic removal from water. The TEM results showed that Ag/NiFe2O4 species were dispersed on the surface of MWCNTs through the available functional groups on their surface. The introduction of Ag/NiFe2O4 nanocomposite onto the MWCNTs efficiently improved the adsorption capacity for ciprofloxacin. The maximum adsorption capacity is estimated to be 26.45 mg/g. The results indicated a higher adsorptive capacity for the produced ternary sample compared to pristine MWCNTs, Ag/NiFe2O4, or NiFe2O4/MWCNTs binary systems. The adsorption capacity for ciprofloxacin in the samples was evidently dependent on the MWCNTs dose, solution pH, adsorbate dose, and temperature. Ag/NiFe2O4 doped MWCNTs (65 % w/w) were able to remove similar to 95 % of ciprofloxacin in the testing solution even after being reclaimed for 4 times following the Langmuir isotherm model in the endothermic manner. Also, the adsorption of CIP by the nanocomposite demonstrates a pseudo-second-order model. These promising results open a pathway for efficient carbon materials to be replaced by conventional adsorbents to remove antibiotics from water
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
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
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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