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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
Chthamalus newmani Benny K. K. Chan & H. -N. Chen & P. R. Dando & A. J. Southward & E. C. Southward 2016, sp. nov.
No full textChthamalus newmani sp. nov. urn:lsid:zoobank.org:act:37C27151-25BE-4F94-AABD-6F06FEF8C7B2 Figs 2D, 2E and 2F and 12–17 FB Chthamalus fissus.—Hedgecock, 1979: 210, Table 3 [5] Chthamalus southwardorum B (in Table, not in text).—Wares et al., 2009: Table 2. [14] Chthamalus southwardorum “Farfan” form.—Meyers et a l., 2013: 77, fig 2. [11] Specimens examined. holotype, NHMUK 2016. 9 (= AJS 1970) 1 specimen from rock ledges, Balboa Statue, Panama City, Panama, 1970; paratypes, NHMUK 2016.10, 2016.11, 2016.12, 2016.13, 2016.14. 5 specimens, same data as holotype. ASIZCR-000334, 0 0 0 335, 0 0 0 336, 0 0 0 341. 4 specimens, same data as holotype; other materials, TEPE78-1, 20 specimens, intertidal rocks, Farfan Beach, Farfan Point, Panama, 8° 56.4' N, 79° 34.1' W, 30 Mar 1978. PWG1, 6 specimens, intertidal rock, 200 m N of Naos Island on the west side of Avenida Amador, 8° 54.63' N, 79° 31.74' W, 3 Feb 1979. Diagnosis. Chthamalus with cirrus I having bidenticulate setae with or without basal guards on the distal segment of the posterior ramus and cirrus II having bidenticulate setae with basal guards on the distalmost two or three segments of the posterior ramus and two distalmost segments of the anterior ramus. External surface of tergum without tergal furrow. Tergoscutal flaps brown when alive. COI sequence (Gene Bank Numbers: KU356709— KU356722). Description. The hard parts were described mainly based on the holotype, supplemented with information from paratypes. Shell depressed, white to pale brown, composed of six plates, radii absent. Orifice elliptical (Fig 2D, 2E and 2F). Inside of shell white to pale brown. Scutum and tergum symmetrical, with tergoscutal flaps brown in colour when alive (Fig 2D, 2E and 2F), dull brown when preserved in formalin or ethanol. Scutum triangular, outer surface of scutum with upper part eroded, with growth lines as striation patterns on the lower basal region. Inner side of scutum white, tergal margin with wide articular ridge and deep articular furrow. Basal margin slightly convex, lateral muscle scar present as 1 or 2 pits. Occludent margin straight without dentations, adductor muscle scar oval and deep (Fig 12). Tergum narrow, height of tergum about 1.5 times greater than the width, tergal margin about 0.6 of the length of the basal margin (Fig 12). External surface eroded with growth lines visible near the basal margin, inner side white and smooth, scutal margin strongly concave, carinal margin convex, basal margin with 4 rostral depressor muscle crests. Spur wide and bluntly convex (Fig 12). Segment counts on cirri I-III were based on five specimens collected from rock ledges, Balboa Statue, Panama City, Panama (AJS-1970) (Table 4). Segment counts on cirri IV-VI were based on the holotype. Cirrus I: posterior ramus with 6 or 7 segments, anterior ramus with 8 or 9 segments (Fig 13A). Distalmost segment of posterior ramus with 1–2 bidenticulate setae with or without basal guards (Figs 13B, 15A and 15C). Serrulate setae dominate on both rami (Fig 15A–15F). Basipod of cirrus I with pappose setae (Fig 15G). Cirrus II: posterior ramus with 5 to 7 segments, anterior ramus with 7 or 8 segments (Fig 13C) (Table 4), posterior ramus with bidenticulate setae with basal guards on the three distalmost segments (Fig 13D), anterior ramus with bidenticulate setae with basal guards on the two distalmost segments (Fig 13E). The number of basal guards on the bidenticulate setae ranges from 1–2 on different specimens (Fig 15H–15P). Serrulate setae are dominant on both rami (Fig 15R–15Q). Basipod with pappose setae. Cirrus III: anterior ramus about equal to posterior ramus, posterior ramus 17 to 19 segments, anterior ramus 18 to 23 segments (Fig 13G, Table 4). Intermediate segments of cirrus III with 3 pairs of long setae and 2 pairs of short setae (Fig 13H). Cirrus IV: anterior and posterior rami similar in length, anterior ramus 23 segments, posterior ramus 20 segments (Fig 14A) intermediate segments of anterior ramus with 3 pairs of long serrulate setae and 2 pairs of short simple setae (Fig 14B). Cirrus V: anterior and posterior rami similar in length, anterior ramus 21 segments, posterior ramus 20 segments (Fig 14C), intermediate segments of both rami with 3 pairs of long serrulate setae and 2 pairs of short simple setae (Fig 14D). Cirrus VI: anterior and posterior rami similar in length, anterior ramus 25 segments, posterior ramus 26 segments (Fig 14E), intermediate segments of both anterior and posterior rami with 3 pairs of long serrulate and 2 pairs of short simple setae (Fig 14F). Basipodite (Fig 14G) and tip of cirrus VI with serrulate setae (Fig 14H). Maxilla, two lobes are separated by a notch without setae, serrulate setae on both lobes (Figs 16A and 17A–17C). Maxillule cutting margin notched, with two large setae above notch, five setae below notch, inferior angle protuberant, with dense setae (Figs 16B, 17D and 17E). Mandible has 4 major teeth, first tooth separated from the remainder, the third and fourth teeth bidentate, pecten with 14 very small teeth, inferior angle tipped with a pair of pointed teeth (Figs 16D and 16E and 17G–17K). Mandibular palp rectangular, superior margin with dense serrulate setae, inferior margin with long serrulate setae (Figs 16F and 17L, 17M and 17N). Labrum concave, with six teeth on each side of the cutting margin, central part of notch with dense setae (Figs 16G and 16H and 17P and 17Q). Penis without basi-dorsal point. Distribution. Found on the Pacific coast of Central America from 13° 55' N, 90° 47' W to 8°51' N, 79° 44' W (range further south unknown). Etymology. Named (by BKKC) in honour of Prof. William Newman, for his extensive contributions in barnacle taxonomy and his leadership of the TEP Expedition (see Southward [32]). Remarks. Hedgecock [5] collected specimens which he designated “FB Chthamalus fissus ” from Farfan Beach, Panama and found identical specimens at Isle del Tigre, Golfo de Fonseca. Using allozyme electrophoresis, he showed these to be a separate species from C. fissus of California and the species collected at Isla Sacrificios and Chamela Bay. Specimens from the Farfan Beach collection of Hedgecock were examined by electrophoresis and by morphology in the present study and found to be C. newmani.Published as part of Benny K. K. Chan, H. - N. Chen, P. R. Dando, A. J. Southward & E. C. Southward, 2016, Biodiversity and Biogeography of Chthamalid Barnacles from the North-Eastern Pacific (Crustacea Cirripedia), pp. 1-51 in PLoS ONE 11 (3) on pages 21-24, DOI: 10.1371/journal.pone.0149556, http://zenodo.org/record/116158
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
Observations on the reproductive biology of three catsharks (Carcharhiniformes: Scyliorhinidae: Asymbolus and Figaro) from the continental shelf of southern Queensland, Australia
Get PDFThree species of Australian endemic catsharks (grey spotted catshark Asymbolus analis, orange spotted catshark A. rubiginosus and Australian sawtail shark Figaro boardmani) were collected from the trawl grounds of a highly seasonal commercial fishery off southern Queensland, Australia. Specimens were collected on the mid to outer continental shelf at depths between 78 and 168 m. This study provides the first information on the reproductive biology of these three poorly-known species. Mature female and male A. analis were observed from 455 mm total length (TL), mature female A. rubiginosus from 410 mm TL, mature male A. rubiginosus from 405 mm TL, mature female F. boardmani from 402 mm TL and mature male F. boardmani from 398 mm TL (although a lack of immature specimens precluded more accurate assessments of size at maturity). The reproductive mode of all species was confirmed as single oviparous (carrying only one egg case in each uterus at a time). Ovarian fecundity (the number of vitellogenic follicles) ranged from 7-20 in A. analis, 5-23 in A. rubiginosus and 9-13 in F. boardmani. Several indicators suggest that Asymbolus catsharks off southern Queensland are reproductively active year-round. The proportion of female A. rubiginosus carrying egg cases was highest in spring (60%), intermediate in autumn (50%) and lowest in winter (44%)
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
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