1,720,957 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
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
Development and evaluation of a new alkalinization additive for road subgrade stabilization
No full textThe stabilization of problematic soils with chemical additives has become a popular practice globally. However, the mechanical and microstructural characterization of subgrade materials stabilized by alkalinization of raw silty sand, a typical soil in British Columbia (BC), Canada, has not yet been studied. This study introduces the novel concept of using an alkaline activator, (a mixture of sodium hydroxide, SH (NaOH) and sodium silicate, SS (Na₂SiO₃)), along with magnesium chloride, L (MgCl₂), to activate the silica and alumina components of silty sand. This chemical mixture named as a magnesium-alkalinization (MA) additive. Compaction and unconfined compressive strength (UCS) tests were used to assess the mechanical properties of the stabilized soil. The development of the MA additive was then used as a substitute component for developing the new chemical additive, which utilized a local bentonite product. The additive developed from the mixture of bentonite, MgCl₂, and alkaline solution was introduced for stabilization of soil. The mechanical and physicochemical results revealed that the addition of 40% bentonite was the optimum content for improving the strength of silty sand, which was then named as the bentonite-magnesium-alkalinization additive (BMA).
The investigations on the mechanism of strength improvement were carried out on the optimum designed sample, based on microstructural analysis using X-ray powder diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDS), and Fourier transform infrared spectroscopy (FTIR). The microstructure analysis confirmed the formation of the cementitious products, such as calcium aluminate silicate hydrate (C-(A)-S-H) and magnesium silicate hydrate (M-S-H) in the treated sample.
Further investigations on the effect of curing temperature for BMA additive revealed the optimal development of UCS occurred when samples were cured at 60°C for 3 days. The degree of improvement was 7 times compared to natural soil. Further studies on the resilient modulus (MR) and suction (s) relationship were also performed for the silty sand stabilized with the optimum design of the BMA additive using the normalized model. As a result of the MR-s relationship analysis, seasonal variation is a crucial factor that should be considered when constructing flexible road pavement even for the stabilized soil.Applied Science, Faculty ofEngineering, School of (Okanagan)Graduat
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
DEVELOPMENT AND EVALUATION OF A NEW ALKALINIZATION ADDITIVE FOR ROAD SUBGRADE STABILIZATION
No full textThe stabilization of problematic soils with chemical additives has become a popular practice globally. However, the mechanical and microstructural characterization of subgrade materials stabilized by alkalinization of raw silty sand, a typical soil in British Columbia (BC), Canada, has not yet been studied. This study introduces the novel concept of using an alkaline activator, (a mixture of sodium hydroxide, SH (NaOH) and sodium silicate, SS (Na2SiO3)), along with magnesium chloride, L (MgCl2), to activate the silica and alumina components of silty sand. This chemical mixture named as a magnesium-alkalinization (MA) additive. Compaction and unconfined compressive strength (UCS) tests were used to assess the mechanical properties of the stabilized soil. The development of the MA additive was then used as a substitute component for
developing the new chemical additive, which utilized a local bentonite product. The additive developed from the mixture of bentonite, MgCl2, and alkaline solution was introduced for
stabilization of soil. The mechanical and physicochemical results revealed that the addition of 40% bentonite was the optimum content for improving the strength of silty sand, which was then named as the bentonite-magnesium-alkalinization additive (BMA). The investigations on the mechanism of strength improvement were carried out on the optimum designed sample, based on microstructural analysis using X-ray powder diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDS), and Fourier transform infrared spectroscopy (FTIR). The microstructure analysis confirmed the formation of the cementitious products, such as calcium aluminate silicate hydrate (C-(A)-S-H)
and magnesium silicate hydrate (M-S-H) in the treated sample. Further investigations on the effect of curing temperature for BMA additive revealed the optimal development of UCS occurred when samples were cured at 60°C for 3 days. The degree of improvement was 7 times compared to natural soil. Further studies on the resilient modulus (MR) and suction (s) relationship were also performed for the silty sand stabilized with the optimum design of the BMA additive using the normalized model. As a result of the MR-s relationship analysis, seasonal variation is a crucial factor that should be considered when constructing flexible road pavement even for the stabilized soil
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