1,725,012 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
Fabrication of waveguides and microfluidic channels in fused silica by a femtosecond laser
No full textFabrication of optical waveguides in glasses and crystals is very common for many applications in integrated optics. They are commonly fabricated by ionic exchange or diffu- sion into a transparent substrate, by laser irradiation of spe- cial photorefractive materials, or by lithographic methods. Although these technologies are well established and successful they are not very flexible in terms of geometry that can be obtained especially when three-dimensional photonic devices are required. To overcome this limitation, femtosecond lasers could offer a valid alternative to tradi- tional technologies due to the recent development of high energy density laser sources, which would allow infrared laser to interact with glass substrate as shown in. In this article, it was pointed out, for the first time, that a tightly focussed femtosecond laser can be absorbed inside a bulk glass, giving the opportunity to develop new tech- nologies in optical devices fabrications. Since then, several research groups have reported their results in fabricating many devices, in many materials, using many different laser configurations and parameters
Some remarks about deformation theory and formality conjecture
Get PDFUsing the algebraic criterion proved by Bandiera, Manetti and Meazzini, we show the formality conjecture for universally gluable objects with linearly reductive automorphism groups in the bounded derived category of a K3 surface. As an application, we prove the formality conjecture for polystable objects in the Kuznetsov components of Gushel–Mukai threefolds and quartic double solids
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
Tricholoma tianshanense Z. X. Zhao, J. G.
No full textTricholoma tianshanense Z.X. Zhao, J.G. Song & B. Xu sp. nov.— FIGURES 2, 3 MycoBank: MB842138 Etymology:—Species epithet based on the Tianshan Mountain in Xinjiang, China, where the species was collected. Diagnosis:—Characterized by fairly inconspicuous, cottony-woolly ring, red to brownish-red scales gradually thinning out towards the marginal zone on the pileus, rarely clamped, guttulated basidiospores. Holotype:— CHINA, Xinjiang Province, Hejing county, Dalongchi Park (42°27′34″N, 80°22′51″E), alt. 2650 m, on rich soil with continuous and thick moss cover in a coniferous forest dominated by plants of Picea schrenkiana Fisch. & C.A.Mey., 11 Sept. 2020, Z. X. Zhao & B. Xu, HMUT 1112. GenBank accession numbers:—ITS: OL584020, LSU: OL584019 (not used in the analyses). Description:— Pileus 4–9 cm in diam, at first hemispherical to convex with involute margin, later convex to planodepressus, breaking up into appressed soon in central part, ± confluent fibrilloso-scales, which are red, to brownish red, scales gradually thinning out towards the marginal zone; margin slightly incurved, thin and sharp, sometimes torn. Lamellae emarginate, whitish to cream-colored, somewhat sinuate, rather close to medium spaced. Stipe 50–100 × 20–25 mm, solidus, cylindrical or tapering downwards, with a persistent but fairly inconspicuous, cottony-woolly ring on the upper part of the stipe, whitish and granulose scales above ring, below ring with irregular, light red to dark red fibrilloso-scales. Flesh whitish, solid; Odor very strong, especially when being fresh, like perfume; taste unknown. Basidiospores (4.5–)5.0–5.9(–7) × (4–)4.6–5(˗6) μm [n=50, Q=(1.02–)1.08–1.50(–1.57), Q=1.29 ± 0.12], broadly ellipsoid to ellipsoid, non-amyloid, hyaline, guttulate, thin-walled, smooth. Basidia (29–)30–41(–45) × 5–8 μm, clavate, 4-spored, rarely 2-spored, hyaline, sterigmata up to 4 μm long. Pleurocystidia / cheilocystidia undetermined. Lamellar trama regular, hyaline, parallel, thin-walled hyphae 5–10 µm diam., sometimes branched. Pileipellis cutis, composed of hyaline, cylindrical, thin-walled hyphae 6–17 µm diam., sometimes branched. Stipitipellis formed by cylindrical 5–12 µm wide hyphae. Clamps present but rare. Ecology & Habitat:—Solitary to scattered on soil with thick mosses cover in forests dominated by Picea schrenkiana, fruiting in summer at alt 2650 m. Distribution:—Currently known only Hejing county, Xinjiang Province, China. Additional specimen examined:— CHINA. Xinjiang Province, Hejing (42°27′34″N, 80°22′51″E), alt. 2650 m, on rich soil with continuous and thick moss cover in a coniferous forest dominated by plants of Picea schrenkiana, 11 Sept 2020, Z. X. Zhao & B. X., HMUT 1114. GenBank accession numbers:—ITS: OL584021, LSU: OL584017 (not used in the analyses).Published as part of Zhao, Zhen-Xi, Song, Jia-Ge, Senanayake, Indunil C., Wu, Dong-Sheng, Wang, Guo-Qing & Xu, Biao, 2022, Tricholoma tianshanense sp. nov., in Tricholoma sect. Caligata from Tianshan Mountains in China evidenced by morphological characters and phylogenetic analyses, pp. 22-30 in Phytotaxa 549 (1) on pages 26-27, DOI: 10.11646/phytotaxa.549.1.2, http://zenodo.org/record/660529
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
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