1,720,964 research outputs found
Trichoglossum benghalense (Geoglossales, Ascomycota) from India: new to science
No full textChakraborty, Nilanjan, Tarafder, Entaj, Paul, Anamika, Paloi, Soumitra, Acharya, Krishnendu (2022): Trichoglossum benghalense (Geoglossales, Ascomycota) from India: new to science. Phytotaxa 536 (1): 72-82, DOI: 10.11646/phytotaxa.536.1.
Trichoglossum benghalense N. Chakr., Tarafder & K. Acharya 2022, sp. nov.
No full textTrichoglossum benghalense N. Chakr., Tarafder & K. Acharya, sp. nov., FIGURE 2 & 3 Mycobank: MB 836100 Genbank: MT573336 Type: INDIA, West Bengal, Howrah district, Sarenga town, N 22° 5345’, E 88° 2237’, 6 m a.s.l., 24 Aug. 2019, Nilanjan Chakraborty, SAR 08 (holotype: CUH AM698). Etymology: The specific epithet ‘ benghalense ’ was named in recognition to the location of West Bengal, India. Diagnosis: Apothecia clavate, hirsute, black, 2–6 mm diam. × 20–35 mm high. Hymenium containing long, blackish, single septate hymenial setae. Asci 8-spored, long, amyloid. Ascospores 0-7 septate, long.Published as part of Chakraborty, Nilanjan, Tarafder, Entaj, Paul, Anamika, Paloi, Soumitra & Acharya, Krishnendu, 2022, Trichoglossum benghalense (Geoglossales, Ascomycota) from India: new to science, pp. 72-82 in Phytotaxa 536 (1) on page 75, DOI: 10.11646/phytotaxa.536.1.4, http://zenodo.org/record/622449
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
Agaricus punjabensis Qasim, A. Ashraf & Khalid, Phytotaxa
No full text<i>Agaricus punjabensis</i> Qasim, A. Ashraf & Khalid, Phytotaxa 252(1): 8 (2016) (Figures 2f, 5) <p>Index Fungorum Number: 814981</p> <p> <i>Pileus</i> 42–75 mm in diameter, hemispherical to dome shaped when young, later slightly umbonate, then finally plano-convex with a depression around the umbo at maturity; surface dry, uniformly covered with innates, brownish grey (7F2) to dark brown (7F4) appressed fibrils on a white background, becoming radially fibrillose, splitting radially upon expansion; margin entire, slightly uplifted when mature, appendiculate with partial veilar remnants; context 7 mm thick at centre, white (1A1), fleshy, colour turns light yellow (1A4) on cutting. <i>Lamellae</i> free, 4–6 mm broad, very crowded; with 4–5 series of intercalated lamellulae, pinkish when young, becoming dark brown (6F8) on maturity; regular, edge even, concolorous. <i>Stipe</i> 40–80 × 5–12 mm, central, curved at the middle, surface smooth, white (1A1) to cream above the annulus, dark brown (6F5) below the annulus, dark greyish brown (6E3) at the base, light brown (6D5-6) near the annulus, colour turns light yellow (1A5) on cutting, marginate base (up to 16 mm) without rhizomorphs. <i>Annulus</i> superous, double, membranous, upper surface smooth, lower surface with scales arranged in a cogwheel, thick, 37 mm diam., white (1A1). <i>Odour</i> indistinct.</p> <p> <i>Basidiospores</i> [35,1,1] (5.0–)5.9–6.8(–8.5) × (3.2–)4.1–4.7(–5.6) μm, X m = 6.4 ± 0.9 × 4.4 ± 0.6 μm, Q = 1.3– 1.6, Q m = 1.5 ± 0.07, ellipsoid, smooth, dark brown with KOH, thick-walled. <i>Basidia</i> 15–18 × 5–7 μm, clavate, hyaline, occasionally gluttulate, thin-walled, smooth, 4-spored, sterigmata 1.5–3 µm long. <i>Basidioles</i> 12–15 × 6–7 μm, clavate, hyaline, thin-walled, smooth. <i>Cheilocystidia</i> 11–16 × 6–8 μm, sub-clavate to sphaeropedunculate, hyaline, thin-walled, smooth. <i>Pleurocystidia</i> absent. <i>Pileipellis</i> a cutis, hyphae 7–10 μm broad, branched, short inflated cells with brown diffused pigments, thin-walled, smooth. <i>Stipitipellis</i> hyphae 5–7.5 μm broad, light brown with KOH, thin-walled. <i>Annulus</i> composed of long cylindrical hyphae, 6–8.5 μm broad, hyaline with KOH, not constricted at the septa, smooth, thin-walled.</p> <p>Macrochemical reactions:—KOH reaction positive, pileus surface and context turning yellow (2A6), stipe surface and context changing to yellow (2A6); Schäffer reaction on pileus surface negative.</p> <p>Habit and habitat:—solitary to gregarious, terrestrial on humus soil under a dicotyledonous tree.</p> <p>Specimen examined:— INDIA: West Bengal, South 24-parganas District, Mathurapur, Halder Para, 22°7’14.85”N, 88°23’29.14”E, alt. 7.0 m asl., 04 August 2019, E. Tarafder, CUH AM758.</p> <p> Remarks:— <i>Agaricus punjabensis</i> was described for the first time in Pakistan (Chen <i>et al</i>. 2016). The occurrence of this species in India represents its first record outside of Pakistan. The Indian collection matches quite nicely with the original protologue but differs in having larger basidiospores (5–8.5 × 3.2–5.6 μm vs. 3.5–5 × 2.5–3.5 μm).</p> <p> <i>Agaricus punjabensis</i> shares morphological features with <i>A</i>. <i>endoxanthus</i> Berk. & Broome, <i>A</i>. <i>volvatulus</i> Heinem. & Gooss. -Font., <i>A</i>. <i>moelleri</i> Wasser, and <i>A</i>. <i>microvolvatulus</i> Heinem. However, <i>A</i>. <i>endoxanthus</i> Berk. & Broome has a stipe the surface of which is unchanging on bruising and much larger globose to clavate cheilocystidia (14–32 × 10–17 μm vs. 11–16 × 6–8 μm), pyriform, turbinate or subspherical (Parra <i>et al</i>. 2013). <i>Agaricus volvatulus</i> Heinem. & Gooss. -Font., has much smaller basidiospores (4.7–5.7 × 3.2–3.7 μm) and an absence to rare presence of cheilocystidia (Heinemann 1956). <i>Agaricus moelleri</i> Wasser differs by its entirely white stipe and much larger cheilocystidia (10–28 × 7.0–20 μm; Parra 2013). <i>Agaricus microvolvatulus</i> Heinem. differs by its smaller basidiospores (3.8–4.8 × 2.8–3.3 μm) and much broader cheilocystidia (7.0–12.5 μm broad; Heinemann 1971).</p>Published as part of <i>Tarafder, Entaj, Dutta, Arun Kumar, Karunarathna, Samantha C., He, Mao-Qiang, Tian, Fenghua & Acharya, Krishnendu, 2023, Agaricus sect. Xanthodermatei (Agaricales) of West Bengal, India, pp. 245-265 in Phytotaxa 630 (4)</i> on pages 256-258, DOI: 10.11646/phytotaxa.630.4.1, <a href="http://zenodo.org/record/10417658">http://zenodo.org/record/10417658</a>
Agaricus xanthodermulus Callac & Guinb., Mycologia
No full text<i>Agaricus xanthodermulus</i> Callac & Guinb., Mycologia 97(2): 421 (2005) (Figures 2g –h, 6) <p>Index Fungorum Number: 501381</p> <p> <i>Pileus</i> 35–79 mm in diameter, broadly convex to conico-convex when young, then expanding to plano-convex at maturity, often depressed at the center; surface semi moist, distinctly covered with light brown (3F1) squamules on a white background that is cracked irregularly when young, on maturity squamules diminishes and the surface apparently looks almost smooth; margin with traces of white velar remnants, sometimes rimose; context 5 mm thick at centre, fleshy, white (1A1), not discolouring on cutting. <i>Lamellae</i> free, 5–8 mm broad, close to crowded; with 2–3 series of lamellulae, pinkish white (12A2) to pastel pink (11A4) when young, becoming dark brown (6F6-8) on maturity; irregular, forked near the middle towards the stipe, edge even, concolorous. <i>Stipe</i> 30–80 × 5–11 mm, central, slightly curved at the upper half, fusiform, surface smooth at apex, slightly fibrillose towards the base, white to cream, reddish brown (9D6) at the extreme apex, turning yellowish on bruising; context fleshy, white, discolouring light yellow on cutting, slightly bulbous without rhizomorphs. <i>Annulus</i> superous to supramedian, double, membranous, upper surface smooth, lower surface fibrillose, thick, 40 mm diam., white (1A1). <i>Odour</i> phenolic.</p> <p> <i>Basidiospores</i> [30,1,1] (5.9–)6.4–7.3(–8.2) × (3.5–)4.4–5.2(–5.6) μm, X m = 7.2 ± 1.02 × 4.6 ± 0.6 µm, Q = 1.3–1.9, Q m = 1.6 ± 0.2, ellipsoid to elongate, smooth, brown to dark brown with KOH, slightly thick-walled. <i>Basidia</i> 15–22 × 6–7.5 μm, clavate, hyaline, gluttulate, thin-walled, smooth, 4-spored, sterigmata 1.2–3.2 μm long. <i>Basidioles</i> 10–15 × 6–7 μm, clavate, hyaline, thin-walled, smooth. <i>Cheilocystidia</i> 12–16 × 8–10 μm, clavate, sphaeropedunculate, rarely subglobose, sometimes in chains, hyaline, thin-walled, smooth. <i>Pleurocystidia</i> absent. <i>Pileipellis</i> a cutis, hyphae 7–12 μm broad, branched, cells hyaline, thin-walled, smooth. <i>Stipitipellis</i> hyphae 5–7.5 μm broad, hyaline to light brown with KOH, thin-walled. <i>Annulus</i> composed of long cylindrical hyphae, 5–9 μm broad, hyaline with KOH, not constricted at the septa, smooth, thin-walled.</p> <p>Macrochemical reactions:—KOH reaction positive, pileus surface and context turning light yellow (1A5) to yellow (2A6); stipe surface and context changing light brown (6-7D6); Schäffer reaction on pileus surface negative.</p> <p>Habit and habitat:—caespitose, terrestrial on humus soil under a dicotyledonous tree.</p> <p>Specimen examined:— INDIA: West Bengal, Kalimpong District, Mongbol Busty, 27°3’47.41”N, 88°27’39.25”E, alt. 1128.0 m asl., 02 June 2019, E. Tarafder & J. Tamang, CUH AM759.</p> <p> Remarks:— <i>Agaricus xanthodermulus</i> was originally described from France (Callac and Guinberteau 2005) and later reported to occur in Ethiopia (Sitotaw <i>et al</i>. 2015). Our collection constitutes the first record for India.</p> <p> Our collection matches the type description (Callac and Guinberteau 2005), but it differs in having a pileus covered with light brown squamules on a white background that is cracked irregularly when young. However, the Ethiopian collection (Sitotaw <i>et al</i>. 2015) and some French collections (Parra 2013) match very well with our collection.</p>Published as part of <i>Tarafder, Entaj, Dutta, Arun Kumar, Karunarathna, Samantha C., He, Mao-Qiang, Tian, Fenghua & Acharya, Krishnendu, 2023, Agaricus sect. Xanthodermatei (Agaricales) of West Bengal, India, pp. 245-265 in Phytotaxa 630 (4)</i> on page 258, DOI: 10.11646/phytotaxa.630.4.1, <a href="http://zenodo.org/record/10417658">http://zenodo.org/record/10417658</a>
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
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