1,720,956 research outputs found
FIGURE 2 in Schizostachyum longinternodium (Poaceae: Bambusoideae), a new species from Yunnan, China
No full textFIGURE 2. Schizostachyum longinternodium sp. nov.(Guangzhou, Apr. 2010. Photo by Chaohan Zheng) A. sheath on part of culm. B. flowering branches. C. pseudospikelet. D. stamens and ovary. E. prophyll.Published as part of Zheng, Chaohan, Lin, Rushun, Ni, Jingbo & Xia, Nianhe, 2014, Schizostachyum longinternodium (Poaceae: Bambusoideae), a new species from Yunnan, China, pp. 155-159 in Phytotaxa 184 (3) on page 157, DOI: 10.11646/phytotaxa.184.3.5, http://zenodo.org/record/514666
FIGURE 1 in Schizostachyum longinternodium (Poaceae: Bambusoideae), a new species from Yunnan, China
No full textFIGURE 1. Schizostachyum longinternodium sp. nov. (drawn by Dinghan Cui and Chaohan Zheng based on the type specimen Chaohan Zheng 024, IBSC.) A. leafy and flowering branches. B. culm leaf sheath on part of culm. C. part of the culm. D. branch complement of subequal branches. E. two pseudospikelets. F. two prophylls. G. lemma (right) and palea with rachilla prolongation (left). H. rachilla internode. I. stamens. J. pistil. K. pubescence on abaxial surface of foliage leaf.Published as part of Zheng, Chaohan, Lin, Rushun, Ni, Jingbo & Xia, Nianhe, 2014, Schizostachyum longinternodium (Poaceae: Bambusoideae), a new species from Yunnan, China, pp. 155-159 in Phytotaxa 184 (3) on page 156, DOI: 10.11646/phytotaxa.184.3.5, http://zenodo.org/record/514666
Schizostachyum longinternodium Zheng & Lin & Ni & Xia 2014
No full textKey to the Schizostachyum longinternodium and similar species 1 Culms not rigidly erect or suberect, apically long pendulous or clambering............................. S. pseudolima McClure (1940: 537) - Culms self-supporting, apically suberect or some culms slightly drooping at the apex.................................................................... 2 2 Culm sheath>1/3 length of internode, without protuberances on its shoulders; pairs of stamen filaments basally connate........................................................................................................................ S. funghomii McClure (1935: 585) - Culm sheath ≤1/3 length of internode, with protuberances on its shoulders; all stamen filaments connate.......... S. longinterodiumPublished as part of Zheng, Chaohan, Lin, Rushun, Ni, Jingbo & Xia, Nianhe, 2014, Schizostachyum longinternodium (Poaceae: Bambusoideae), a new species from Yunnan, China, pp. 155-159 in Phytotaxa 184 (3) on page 159, DOI: 10.11646/phytotaxa.184.3.5, http://zenodo.org/record/514666
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
Schizostachyum longinternodium N. H. Xia, R. S. Lin & C. H. Zheng 2014, sp. nov.
No full textSchizostachyum longinternodium N. H. Xia, R. S. Lin & C. H. Zheng sp. nov. (Figs 1 & 2) Type:— CHINA. Guangdong: South China Botanical Garden (cultivated, introduced from 21°56´N; 101°14´E, Menglun, Xishuangbanna, Yunnan), 5 May 2010, Zheng Chaohan 024 (holotype IBSC!, isotype KUN!). Diagnosis: — Schizostachyum longinternodium sp. nov. is similar to S. funghomii McClure, but differs by its slightly drooping apex, shorter culm sheaths (less than 1/3 of the internodes) with protuberances on culm sheaths shoulders, persistent oral setae on the leaf sheaths, a solitary floret in every spikelet, and connate filaments. (Table 1) Rhizomes pachymorph. Culm erect, 8–12 m tall, 3–6 cm diam., apically slightly drooping. Internodes 56–86 cm long, terete, scabrous, siliceous, white powdery below nodes, white strigose; walls ca. 2 mm thick. Nodal ridge not prominent, sheath scars prominent. Branching from the 6th–9th node upwards; branches many, subequal, 45–90 cm long. Culm sheaths tardily deciduous, thickly papery, brittle, lower ones less than 1/3 the length of internodes, ribbedstriate when dry, siliceous, white strigose, with protuberances on its shoulders, the margin with cilia 1 mm long, the apex truncate; auricles inconspicuous, the oral setae numerous, 3–8 mm long, hispidulous at base; ligule truncate or not, 1 mm tall, the margin lobed; blade reflexed, linear-lanceolate, less than 1/3 the length of the sheath at lower nodes, abaxially glabrous, adaxially densely hispid, the apex acuminate. Leaves 5–9 per ultimate branch; sheath up to 12 cm long, initially hispid, usually siliceous, margin ciliate; auricles inconspicuous, oral setae numerous, 3–5 mm; ligule ca. 1 mm, margin lobed; petiole 4–6 mm long; blades oblong-lanceolate to ovate-lanceolate, 26–42 cm long, 4–6.5 cm wide, margin on both sides denticulate, adaxially glabrous, abaxially densely pubescent, base rounded, apex acuminate. Inflorescence branches ca. 30 cm long, clustered at nodes of culms and branches, occasionally terminal to leafy branches. Pseudospikelets fusiform, green infused with purple, the prophylls lanceolate, asymmetrical, ca. 5 mm long, papery, apex acuminate, keels 2, ciliate, converging at the tip; bracts 1 to several, oblong, 1–1.3 cm long, papery, many-veined, the apex obtuse to acute and mucronate, the mucro less than 1 mm long; floret solitary, 3 cm long; rachilla disarticulating, internode ca. 3 mm long; terminal rachilla prolongation 1.5–1.8 cm long, slender, embedded in the groove between the 2 keels of the palea; the glumes absent; the lemma oblong-lanceolate, papery, 1.5 cm long, densely white hispidulous, many-veined, apex acute and mucronate, the mucro ca. 1 mm long; palea 2.5–3 cm long, papery, nearly glabrous, apically bifid; lodicules absent; filaments ca. 1.8 cm long, connate and tubular; anthers 6, purple, ca. 1.1 cm long; ovary narrowly ovoid, glabrous, not distinctly separated from the style; style pale-yellow; stigmas 3, purple, plumose. Caryopsis fusiform, ca. 2 cm long. Distribution, habitat and phenology: — Schizostachyum longinternodium is distributed in south and southeast Yunnan, China. It grows in forest, in gullies or along rivers, 550–600 m elevation.A plant was introduced to Guangzhou and flowered from March to October, 2010, and the whole clump died. In the following year, the seeds germinated and the seedlings developed the same characters as the parent. Local use: —It is suitable for weaving utensils because of its long internodes. Etymology: —The specific epithet refers to the long internodes.Published as part of Zheng, Chaohan, Lin, Rushun, Ni, Jingbo & Xia, Nianhe, 2014, Schizostachyum longinternodium (Poaceae: Bambusoideae), a new species from Yunnan, China, pp. 155-159 in Phytotaxa 184 (3) on page 158, DOI: 10.11646/phytotaxa.184.3.5, http://zenodo.org/record/514666
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
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