1,720,955 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
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
A novel approach for biopitch-derived carbon foams: Combining mesoporous SBA-15 silica hard-templating method and chemical activation to modify the characteristics
No full textThis research aims to develop low-cost bio-based carbon foams, one of the newest forms of carbon that can be utilized in adsorption, catalytic reactions or thermal insulation applications by recycling hornbeam sawdust. Pyrolysis, biopitch synthesis, foaming, templating, carbonization, and activation processes were integrated to convert industrial waste sawdust into carbon foam with controllable properties. A strategy was followed to determine the impact degree of the template contribution and the chemical activation on the three-dimensional hierarchically arranged porous carbon foam production by regular and homogeneous foaming of the biopitch. The feasibility of obtaining foams with high surface area, consisting of meso- and micro-porous channels and macro-porous cores, and having a self-organized hierarchical structure was investigated when SBA-15 was employed as a hard template. Carbon foams with inferior thermal conductivity (0.25 W/m.K) and high strength (>1.5 MPa) were developed that have the potential to be utilized in thermal insulation applications. In light of the characterization results, it was concluded that carbon foams could attain the standard of being thermal insulation material based on the thermal conductivity coefficient measurements, and bio-based carbon foams additionally fulfill the adsorbent or catalyst support requirements in their respective fields of application. To illustrate the modifiable nature of material properties in the production process of carbon foam, it is absolutely critical to compare the template approach and chemical activation procedures. In conclusion, by highlighting clean production actions that utilize biomass as a superior option to fossil-based raw materials, it will be possible to contribute to the design of operating circumstances that adopt sustainable environmental awareness.Scientific and Technological Research Council of Turkiye (TUBITAK) [219M104]The authors would like to thank The Scientific and Technological Research Council of Turkiye (TUBITAK) under Grant Number 219M104 for financial support
The soft template-assisted foaming technique's impact on biopitch-based porous carbon foam features
No full textThermoplastic features, high carbon content, low ash level, and abundant phenolic chemical content of biopitch have made it a suitable precursor for carbonaceous materials. The present study aimed to investigate the utilization of a previously untested soft template-assisted foaming technique in the fabrication of biopitch-based carbon foam that provided brightness to the research in the literature. The hornbeam sawdust pitch-based carbon foams were formed by incorporating the non-ionic surfactant P123 into the synthesis solution. The research focused on understanding the effects of the foaming technique (conventional or template-assisted), template ratio, and chemical activation on the foam's physical, chemical, and mechanical properties via several analytical and characterization test methods. Raman spectroscopy, scanning and transmission electron microscopy analyses were performed to characterize the pore structures and carbon hybridization types, deducing highly aligned graphitic-like structures. Moreover, the mechanical strength of carbon foam was also enhanced via soft-template addition before foaming and diminished after chemical activation. The highest mechanical strength of 9.79 MPa with suitable thermal conductivity of 0.044 W/m.K and the lowest porosity of 71.41 % were attained when the template amount was 1 wt%. Surface areas of activated carbon foams ranged from 92.3 to 1121.2 m2/g. Accordingly, the adjustable pore structures of the developed materials allowed them to be considered promising adsorbents according to the need to remove pollutants of different sizes. The results obtained from the study will provide valuable insights into the effectiveness of the soft template-assisted foaming technique in high-quality and hierarchically arranged graphitic carbon foam production and its potential applications in thermal insulation.Scientific and Technological Research Council of Tuerkiye (TUEBITAK) [219M104]The authors would like to thank The Scientific and Technological Research Council of Tuerkiye (TUEBITAK) under the Grant Number 219M104 for financial support
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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