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A new species of Polymorphus Lühe, 1911 (Acanthocephala: Polymorphidae) in Black Coot, Fulica atra (Aves: Rallidae), Pakistan
No full textBirmani, Nadir Ali, Dharejo, Ali Murtaza, Khan, Muhammad Munif (2011): A new species of Polymorphus Lühe, 1911 (Acanthocephala: Polymorphidae) in Black Coot, Fulica atra (Aves: Rallidae), Pakistan. Zootaxa 2929: 64-68, DOI: 10.5281/zenodo.20679
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
Polymorphus fulicai Birmani, Dharejo & Khan, 2011, n. sp.
No full textPolymorphus fulicai, n. sp. Figs (1–8) Diagnosis. Body in both sexes spinose, thick, fusiform. Proboscis globular, double walled. Neck long cylindrical. Proboscis receptacle cylindrical, double walled. Body of female worms filled with ovarian balls and eggs scattered in entire body up to proboscis receptacle. Second quarter of trunk in both sexes covered with small spines, distributed equally on ventral and dorsal surfaces in 46 longitudinal rows of 16 spines each; spines 0.03 mm long. Proboscis armed with 19 longitudinal rows of 8 hooks each. Basal hooks and apical hooks smaller in size than middle ones. Cement glands four, cylindrical. The new species differs from its congeners on the basis of distribution of cuticular spines, number of longitudinal rows of hooks, number of hooks per row, size of hooks, smaller lemnisci and oblique testes. Description (Table 1). Host. Black Coot, Fulica atra Linnaeus, 1758 (Aves: Rallidae) Site of infection. Intestine Etymology. Specific name refers to generic name of the host. Remarks. Lühe (1911) proposed Polymorphus to accommodate acanthocephalans from birds, establishing the type species as P. boschadis (Schrank, 1788) Railliet, 1919, later recognized as a synonym of P. minutus (Goeze, 1782) Lühe, 1911. Several members of genus have been reported from birds, including the following species: P. trochus Van Cleave, 1945; differs from the present species in having a larger body in both sexes, a pear shaped proboscis of females much inflated at the base, a swollen trunk, the number of longitudinal rows of hooks, the number of hooks per row and larger eggs. Male: Female: Entire worm 2.81–2.95 Entire worm 2.53–2.85 Trunk 2.17–2.21 x 0.56–0.62 Trunk 1.95–2.21 x 0.56–0.68 Proboscis 0.26–0.30 x 0.16–0.18 Proboscis 0.24 x 0.15–0.16 Neck 0.38–0.43 x 0.32–0.33 Neck 0.33–0.40 x 0.30–0.32 Proboscis receptacle 0.43–0.57 x 0.12–0.16 Proboscis receptacle 0.32–0.50 x 0.15–0.17 Lemnisci 0.50–0.60 Lemnisci 0.40–0.60 Spinose area of trunk 0.56–0.58 x 0.55–0.56 Spinose area of trunk 0.57–0.58 x 0.54–0.68 Anterior testis 0.22–0.27 x 0.13–0.18 Ovarian balls 0.06–0.11 x 0.04–0.07 Posterior testis 0.21–0.26 x 0.15–0.18 Eggs 34– 71 x 10–15 P. cucullatus Van Cleave et Starrett, 1940 collected from the hooded merganser, Lophodytes cucullatus; differs from the present species in having larger body, a short neck, the number of longitudinal rows of hooks (22), the number of hooks per row (12), the size of the hooks, lemnisci twice as long as the proboscis receptacle and in the distribution of cuticular spines. P. a c u t i s Van Cleave et Starrett, 1940; differs from the present species in having a larger body, the number of longitudinal rows of hooks (16) and the number of hooks per row (11–12). P. magnus Skrjabin, 1913; differs from the present species in having a larger body in both sexes, the number of longitudinal rows of hooks, the number of hooks per row and larger eggs. P. spindlatus Amin and Heckmann, 1991 collected from the black crowned night heron, Nycticorax nyticorax; differs from the present species in having a larger body in both sexes, a spindle shaped proboscis, the number of longitudinal rows of hooks (8), the number of hooks per row (11–13), the shape of the trunk, and the distribution of cuticular spines. P. minutus (Goeze, 1782) Lühe, 1911 collected from Anas platyrhynchos platyrhynchos; differs from the present species in having a larger body, the number of longitudinal rows of hooks (16–18), and the number of hooks per row (6– 8). P. m a r i l i s Van Cleave, 1939 collected from Nyroca marila, Microplama himantopus, Anas p. platyrhynchos, Nyroca affinis, Clangula, Pseudotadorna and Phalacrocorax; differs from the present species in having a larger body in both sexes, a longer neck, the shape of the proboscis, the number of longitudinal rows of hooks (16–17), and the number of hooks per row (7–8). P. o b t u s u s Van Cleave, 1918 collected from water turkey, Anhinga anhinga, and great blue heron, Ardea herodias, Anas platyrhynchos, Mergus merganser; differs from the present species in body shape, a larger body, the number of longitudinal rows of hooks (16), the number of hooks per row (7–10), having broad and fan shaped lemnisci, and larger eggs. P. s w a r t z i Schmidt, 1965 collected from Barrows golden eye, Bucephala islandica; differs from the present species in body size, having a conspicuous swelling of the fore trunk, the number of longitudinal rows of hooks (18), the number of hooks per row (10–11), and larger eggs. P. co r y n o s o m a Travassos, 1915 collected from Nyctanassa v. violacea, Nycticorax sp.; differs by having a larger body size, the number of longitudinal rows of hooks (16), the number of hooks per row (15), all hooks of the proboscis having the same length, larger lemnisci, and the distribution of body spines up to the level of extension of proboscis receptacle. P. formosus Schmidt and Kuntz, 1967; the new species has a close resemblance to P. formosus Schmidt and Kuntz, 1967 in the shape of the body but differs in being smaller in body size, the number of longitudinal rows of hooks, the number of hooks per row, the size of the hooks smaller on the base and apex, smaller lemnisci, having oblique testes, and trunk spines that are dense, equally distributed ventrally and dorsally. Whereas P. formosus has a larger body, the number of longitudinal rows of hooks is 12–15, the number of hooks per row is 7–9, the size and shape of the hooks is similar in each row, the lemnisci are longer, the testes are tandem and only a few spines are present on the trunk. As mentioned above, in Pakistan, P. nickoli has been reported from Corvus splendens by Khan and Bilqees (1998), Khan, Ghazi and Bilqees (2002) reported P. sindhensis from Corvus splendens, Mutiur-Rahman, Khan, Bilqees, and Khatoon (2008) reported P. mohiuddini from owls, and Khan et al. (2008) reported P. fatimaae in Corvus splendens. Polymorphus nickoli differs from the present species in having a larger body size, a smaller neck, the shape of the proboscis, number of longitudinal rows of hooks (10), number of hook per row (16), lemnisci smaller than the proboscis receptacle, and the smaller size of eggs; body spines of P. nickoli are not mentioned. Polymorphus sindhensis differs from the present species in having larger body size, females larger than males, smaller neck, number of longitudinal rows of hooks (14), number of hooks per row (16) and smaller size of eggs; body spines of P. sindhensis are not mentioned. Polymorphus mohiuddini, known only from male worms, differs from the present species in having a larger, elongated body, a smaller neck, a cylindrical and pyriform proboscis, the number of longitudinal rows of hooks (20–23) and number of hooks per row (12–14). Polymorphus fatimaae differs from the present species in having a larger body size, a smaller neck, the number of longitudinal rows of hooks (9–12), number of hooks per row (6–12) and a more elongated and separated testes; body spines of P. fatimaae are not mentioned.Published as part of Birmani, Nadir Ali, Dharejo, Ali Murtaza & Khan, Muhammad Munif, 2011, A new species of Polymorphus Lühe, 1911 (Acanthocephala: Polymorphidae) in Black Coot, Fulica atra (Aves: Rallidae), Pakistan, pp. 64-68 in Zootaxa 2929 on pages 64-67, DOI: 10.5281/zenodo.20679
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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