400,614 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
Pholcus linzhou Zhang & Zhang 2000
No full text<i>Pholcus linzhou</i> Zhang & Zhang, 2000 <p>(Fig. 25)</p> <p> <i>Pholcus linzhou</i> Zhang & Zhang 2000: 152, f. 2A–I.</p> <p> <b>Diagnosis.</b> This species, one of seven similar species (see remark <i>P</i>. <i>henanensis</i>), is very similar to <i>P. mianshanensis</i> <b>sp. nov.</b> in the shape of the epigynum, both with long whip-shaped apophysis (Figs. 25A and 16A). It differs from the latter by the shape of the tip of the procursus (Figs. 25G–H), and by the mountain range-shaped uncus (Fig. 25G).</p> <p> <b>Redescription.</b> Male (holotype) total length 5.0: cephalothorax 1.5 long, 1.8 wide; abdomen 3.5 long, 1.5 wide. Leg I: 36.1 (9.1+0.8+8.7+15.1+2.4), tibia II: 6.0, tibia III: 4.2, tibia IV: 6.1; tibia I L/D: 62. Prosoma shape as in Fig. 25C. Carapace short, broad and almost circular, ochre, with pair of brown marks broadly connecting to ocular area. Cephalic region raised, with brown central stripe, ocular area dark yellow. Clypeus 0.50, slightly ochre, without marks. Distance AME–AME 0.04. Diameter AME 0.09, ALE 0.14, PME 0.14, PLE 0.16. Chelicerae as in Fig. 25E, with pair of black apophyses distally and pair of unsclerotized thumbshaped apophyses proximolaterally. Labium and endites yellow. Sternum slightly ochre, with four pairs of yellow marginal marks and a central mark on it as in Fig. 25F. Femora, patellae and tibiae ochre, with dark rings, metatarsi and tarsi brown. Abdomen cylindrical, pale ochre, dorsum with many of brown spots on it as in Fig. 25C. Venter pale brown, without marks. Palps as in Figs. 25G and 25H, bulb with a mountain rangeshaped uncus and short appendix.</p> <p> <b>Variation.</b> Tibia I in 14 male paratypes (two males missing tibia I): 7.9–9.0 (mean 8.6). Body length in 16 males paratypes: 4.1–5.2.</p> <p>Female: in general very similar to male. Total length of paratype bodies 4.6–5.5. A paratype measured, total length 5.3: cephalothorax 1.6 long, 1.5 wide; abdomen 3.7 long, 1.8 wide. Tibia I: 7.8. Clypeus 0.58 high. Epigynum roughly semicircular as in Fig. 25A, with a long whip-shaped apophysis on the top and a semicircular dark shadow centrally. Dorsal view as in Fig. 25B, with a mounded sclerotized arch anteriorly and a pair of oval pore plates.</p> <p> <b>Distribution.</b> Henan, Hebei.</p> <p> <b>Material examined.</b> CHINA: <b>Henan</b>, Linzhou City, Hongqi Canal, May 11, 1999, leg. F. Zhang, male holotype, 5♂, 3♀ paratypes (MHBU); Shibanyan, July 24, 2006, leg. B. S. Zhang, 5♀ (MHBU); Dengfeng County, Sanhuangzhai Scenic Spot, August 6, 2002, leg. J. Y. Yang, 3♂, 2♀ (MHBU). <b>Hebei</b>, Wu’an County, Liejiang Town, June 28, 1999, leg. F. Zhang, 11♂, 5♀ paratypes (MHBU).</p>Published as part of <i>Zhang, Feng & Zhu, Ming-Sheng, 2009, A review of the genus Pholcus (Araneae: Pholcidae) from China, pp. 1-114 in Zootaxa 2037 (1)</i> on pages 50-52, DOI: 10.11646/zootaxa.2235.1.2, <a href="http://zenodo.org/record/5317608">http://zenodo.org/record/5317608</a>
Riseveinus compressus Zhang, Zhang & Wei
No full text<i>Riseveinus compressus</i> Zhang, Zhang & Wei <p> <i>Riseveinus compressus</i> Zhang, Zhang & Wei, 2010: 64.</p> <p> <i>Riseveinus compsessus</i> [sic] Zhang, Zhang & Wei, 2010: 62, misspelled</p> <p> <b>Remarks.</b> This species name was misspelled as " <i>R. compsessus</i> " in the key of the original publication (Zhang <i>et al</i>. 2010). Following International Code of Zoological Nomenclature (ICZN) Article 24.2.3, the correct spelling is here fixed as " <i>R. compressus</i> ", and " <i>R. compsessus</i> " is designated as an incorrect original spelling.</p>Published as part of <i>Wang, Yang, Dietrich, Christopher H. & Zhang, Yalin, 2018, Four new species of the leafhopper genus Riseveinus Li (Hemiptera: Cicadellidae: Evacanthinae) from China and Thailand, pp. 259-266 in Zootaxa 4508 (2)</i> on page 266, DOI: 10.11646/zootaxa.4508.2.8, <a href="http://zenodo.org/record/2607072">http://zenodo.org/record/2607072</a>
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
SCI citation analysis and impact factor prediction of JZUS-B in 2008
Full text linkWe analysis the SCI citation of Journal of Zhejiang University-SCIENCE B, predict its 2008 Impact Factor in the range of 0.737~0.915, and list the top-10 SCI cited articles
Pseudopoda tricuspidata Zhang & Zhang & Zhang 2023, sp. n.
No full text<i>Pseudopoda tricuspidata</i> sp. n. <p>Figs 1–9</p> <p> <b>Type material.</b> <b>Holotype male</b> (MHBU-ARA-2021-376-1): <b> CHINA: <i>Gansu Province</i>:</b> Hui County, Xiaolongshan National Nature Reserve, 33°40′38″N, 106°19′43″E, 1914 m, 13August 2021, Zhaoyi Li & Rui Zhang leg. <b>Paratypes:</b> 4♀ (MHBU-ARA-2021-376-2 ~ MHBU-ARA-2021-376-5), with same data as holotype; 1♀ (MHBU-ARA-2021- 376-6), Tianshui City, Jinlong Mountain, 34°23′50″N, 106°27′57″E, 1632 m, 6 August 2021, Zhaoyi Li & Rui Zhang leg.; 1♁ (MHBU-ARA-2021-376-7), same city, Quxi Forest Park, 34°14′56″N, 106°0′45″E, 1433 m, 9 August 2021, Zhaoyi Li & Rui Zhang leg.; 1♁ (MHBU-ARA-2021-376-8), Niangniangba Town, Baiyin Village, 34°11′39″N, 105°54′E, 1648 m, 8 August 2021, Zhaoyi Li & Rui Zhang leg.; 1♀ (MHBU-ARA-2021-376-9), Liangdang County, Yunping Town, 33°38′34″N, 106°26′29″E, 1491 m, 13 August 2021, Zhaoyi Li & Rui Zhang leg.</p> <p> <b>Etymology.</b> The specific name is a Latin adjective, derived from “tri” and “cuspidatus” (meaning “three” and “pointed”), referring to the shape of RTA in retrolateral view; adjective.</p> <p> <b>Diagnosis.</b> The male (Figs 7–9) of this new species differs from other <i>Pseudopoda</i> species in having a sickleshaped, prolatero-distad embolus (Fig. 8), except for the similar <i>P. contentio</i> Jäger & Vedel, 2007 (Jäger & Vedel 2007: 11, figs 24–26) and <i>P. amelia</i> Jäger & Vedel, 2007 (Jäger & Vedel 2007: 13, figs 32–34). From these species it can be distinguished by the following combination of characters: (1) tip of embolus as wide as the base in ventral view (vs. gradually narrowed in <i>P. contentio</i> and <i>P. amelia</i>); (2) RTA with three apices (vs. only two in <i>P. contentio</i> and <i>P. amelia</i>). Females (Figs 5, 6) of this new species can be distinguished from all other congeners by the combination of following epigynum characters: (1) lateral lobes fused along median line in ventral view; (2) anterior internal duct system twisted into heart-shaped loops.</p> <p> <b>Description. Male</b> (holotype): total length 5.27; prosoma 2.73 long, 1.64 wide; opisthosoma 2.73 long, 2.42 wide. Eye diameters and interdistances: AME 0.13, ALE 0.21, PME 0.15, PLE 0.17; AME–AME 0.12, AME–ALE 0.05, PME–PME 0.21, PME–PLE 0.17. MOA 0.32 long, anterior width 0.38, posterior width 0.51. Endite 0.63 long, 0.51 wide. Leg measurements (mm): I 11.30 (3.85, 0.60, 2.70, 3.22, 0.93), II 13.32 (3.92, 0.97, 4.08, 3.34, 1.01), III 10.14 (3.07, 1.02, 2.39, 2.73, 0.93), IV 10.37 (3.62, 0.66, 1.85, 3.17, 1.07). Leg formula: 2143. Spination: Palp: 131, 101, 2021; Fe: I–III 323, IV 331; Pa: I–IV 101; Ti: I–IV 2026; Mt: I–IV 2024. Chelicerae with three promarginal and four retromarginal teeth, and with ca. 38 denticles between them.</p> <p>Coloration in ethanol (Figs 1, 2): carapace yellowish brown, with a pair of brown longitudinal lateral bands and a dark longitudinal band. Cervical groove and radial furrows obvious. Radial furrow and dorsal carapace margins with black hairs. Ocular area brown. Chelicerae yellowish brown. Labium yellow, wider than long. Labium and sternum pale yellow. Legs yellow, with brown spots on them, and especially on the bases of setae and spine of femur. Sternum with dark setae. Opisthosoma color overall brown. Dorsal opisthosoma yellowish to reddish brown; venter yellowish, with black and white patches.</p> <p>Palp (Figs 7–9) as in diagnosis. Embolus arising from tegulum at 10 to 11-o’clock-position, running in semicircle, pointing prolaterodistally in ventral view (Fig. 8); spermophore extends along the retrolateral margin of the tegulum, partially hidden in the ventral view, bent in a small angle. RTA with a broad base, arising proximally from tibia, vRTA apically rounded, dRTA and mRTA apically sharped.</p> <p> <b>Female</b> (paratype): total length 6.53; prosoma 2.65 long, 2.62 wide; opisthosoma 3.88 long, 2.55 wide. Endite 0.55 long, 0.36 wide. Eye diameters and interdistances: AME 0.11, ALE 0.19, PME 0.12, PLE 0.14; AME–AME 0.13, AME–ALE 0.06, PME–PME 0.21, PME–PLE 0.23. MOA 0.31 long, anterior width 0.35, posterior width 0.45. Leg measurements: I 6.77 (2.02, 1.02, 2.01, 1.15, 0.57), II 7.26 (2.36, 1.10, 2.19, 1.28, 0.33), III 6.32 (2.18, 0.76, 1.66, 1.30, 0.42), IV 6.68 (2.04, 0.66, 1.87, 1.76, 0.35). Leg formula: 2143. Spination: Palp: 131, 101, 2021; Fe: I–III 323, IV 331; Pa: I–IV 101; Ti: I–IV 2126; Mt: I–II 2024, III–IV 2026. Chelicerae with three promarginal and four retromarginal teeth, and with ca. 33 denticles between them. Shape, color and markings of body as in male (Figs 3, 4).</p> <p>Epigyne field wider than long (Fig. 5). Anterior margins of lateral lobes C-shaped. Internal duct system with anterior loops extending beyond copulatory opening and lateral loops shaped like longitudinal patches, extending close to posterior margins of lateral lobes in ventral view. Fertilization ducts long, narrow, situated posteriorly, with dorsal tips.</p> <p> <b>Distribution.</b> Known only from the type locality (Fig. 20).</p>Published as part of <i>Zhang, Rui, Zhang, Baoshi & Zhang, Feng, 2023, Two new huntsman spiders from Xiaolong Mountains in Gansu Province, China (Araneae, Sparassidae), pp. 182-190 in Zootaxa 5244 (2)</i> on pages 183-185, DOI: 10.11646/zootaxa.5244.2.6, <a href="http://zenodo.org/record/7656192">http://zenodo.org/record/7656192</a>
Pedionis (Pedionis) yunnana Zhang & Viraktamath
No full text<i>Pedionis</i> (<i>Pedionis</i>) <i>yunnana</i> Zhang & Viraktamath <p> <i>Pedionis</i> (<i>Pedionis</i>) <i>yunnana</i> Zhang & Viraktamath, 2010: 59.</p> <p> <i>Pedionis</i> (<i>Pedionis</i>) <i>nankunshanensis</i> Li, Dai & Li, 2011: 6 figs 38–40, 45–52. <b>syn. nov.</b></p> <p> <b>Distribution.</b> China: Yunnan (Zhengyuan), Guangdong (Nankunshan).</p> <p> <b>Material examined.</b> Holotype: 2 <i>♂♂</i>, 1 ♀, China: Yunnan province, Zhenyuan county, 24 August 2009, collected by Zhang Bin.</p> <p> <b>Remarks.</b> Li <i>et al</i>. (2011) reported <i>Pedionis nankunshanensis</i> as a new species based on the serrated apical processes of the aedeagal shaft, the subapical processes reflexed in ventral aspect, and the apical digitations. We reexamined the types of <i>P. yunnana</i> Zhang & Viraktamath, 2010 and observed some characters that were omitted in past descriptions. All above mentioned characters used to distinguish <i>Pedionis nankunshanensis</i> were also observed in <i>P. yunnana</i>. Although the types of <i>nankunshanensis</i> were not available for study, both the original descriptions and illustrations clearly showed that <i>P. nankunshanensis</i> should be considered a junior synonym of <i>P. yunnana</i>.</p> <p> This species externally resembles <i>Pedionis rufoscutellata</i> Huang & Viraktamath, 1993 in coloration and structure, but it differs in having the caudodorsal angle of the pygophore produced into an acutely angled process.</p>Published as part of <i>Zhang, Bin & Zhang, Ruiling, 2014, A revision of the subgenus Pedionis (Pedionis) Hamilton from China, with description of two new species (Hemiptera: Cicadellidae), pp. 469-476 in Zootaxa 3802 (4)</i> on pages 474-475, DOI: 10.11646/zootaxa.3802.4.4, <a href="http://zenodo.org/record/228901">http://zenodo.org/record/228901</a>
Japanagallia lamellata Zhang
No full text<i>Japanagallia lamellata</i> Zhang <p>Figs 4 B, F, J; 16A–G.</p> <p> <i>Japanagallia lamellata</i> Zhang 2010: 56, figs3, 4, 6, 14–21.</p> <p> <b>Material examined.</b> China: 13, Hainan, Jianfengling, 14.xii.1974, Yang Jikun (CAU). <b>Distribution.</b> China (Hainan).</p> <p> <b>Remarks.</b> This species was adequately described by Zhang (2010) from Hainan Province. It externally resembles <i>J. curvipenis</i>, but can be differentiated by the structure of the male genitalia; the former has poorly developed dorsal apodeme whereas in the latter it is very well developed.</p>Published as part of <i>Dai, Wu & Zhang, Yalin, 2012, Taxonomic revision of the leafhopper tribe Agalliini (Hemiptera: Cicadellidae: Megophthalminae) from China, with description of new taxa, pp. 1-49 in Zootaxa 3430</i> on page 16, DOI: <a href="http://zenodo.org/record/215156">10.5281/zenodo.215156</a>
Xilithus pugio Mu & Zhang 2023
No full text<i>Xilithus pugio</i> Mu & Zhang, 2023 <p> <b>Etymology.</b> This specific name is a Latin word “ <i>pugio</i> ”, meaning “dagger”, referring to the dagger-shaped prolateral tegular apophysis; noun.</p> <p> <b>Description.</b> See Mu & Zhang (2023).</p>Published as part of <i>YANNAN MU & FENG ZHANG, 2023, Further additions to the guardstone spider fauna from China (Araneae: Phrurolithidae). Zootaxa, 5338 (1), 1 - 104., pp. 599-600 in Zootaxa 5346 (5)</i> on page 599, DOI: 10.11646/zootaxa.5346.5.7, <a href="http://zenodo.org/record/10171451">http://zenodo.org/record/10171451</a>
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