1,721,138 research outputs found
FIG. 16 in The jumping plant-lice (Hemiptera, Psylloidea) associated with Schinus (Anacardiaceae): systematics, biogeography and host plant relationships
No full textFIG. 16. Calophya mammifex, last instar larva; left dorsal, right ventral face.Published as part of Burckhardt, D. & Basset, Y., 2000, The jumping plant-lice (Hemiptera, Psylloidea) associated with Schinus (Anacardiaceae): systematics, biogeography and host plant relationships, pp. 57-155 in Journal of Natural History 34 (1) on page 92, DOI: 10.1080/002229300299688, http://zenodo.org/record/527903
An annotated checklist of the jumping plant-lice (Insecta: Hemiptera: Psylloidea) from the Mercantour National Park, with seven new records for France and one new synonymy
No full textZoosystema is a diamond open access journal, free of charges for both the author and the reader and accessible here as soon as published. © Publications scientifiques du Museum national d'Histoire naturelle, Paris. The attached file is the published version of the article.NHM Repositor
Paurocephala minuta Crawford 1919
No full textPaurocephala minuta Crawford Paurocephala minuta Crawford, 1919: 150. Holotype, examined. Description. Species of the brevicephala type. Adult: described by Crawford, 1919. Fifth instar larva: unknown. Host plants. Unknown. Distribution. Philippines (Luzon). Material examined. Holotype, Philippines, Luzon, Los Baños (P. I. Baker) (USNM). Dry mounted. Comments. The female holotype is extensively damaged. Based on the presence of the ventrally serrated lateral valvulae it is a species of the brevicephala type.Published as part of Mifsud, D. & Burckhardt, D., 2002, Taxonomy and phylogeny of the Old World jumping plant-louse genus Paurocephala (Insecta, Hemiptera, Psylloidea), pp. 1887-1986 in Journal of Natural History 36 (16) on page 1965, DOI: 10.1080/00222930110048909, http://zenodo.org/record/529907
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
Paurocephala urenae Russell. The 1946
No full textPaurocephala urenae Russell (gures 5C, G, 8I, 36B) Paurocephala urenae Russell, 1946: 94. Holotype, examined. Paurocephala urenae Russell; Vondrác Ïek, 1963. Description. Species of the gossypii type. Adult: described by Russell (1946). Measurements and ratios as in table 2A–C. Fifth instar larva: described by Russell (1946). Measurements and ratios as in table 3. Host plants. Urena lobata L. (Malvaceae). Distribution. Zaire. Material examined. Zaire: Holotype, paratypes 3, 4 and 7 larvae, Gandajika, May 1945, Urena lobata (D. Soyer) (NHMB, USNM). Dry and slide mounted. Comments. Close to P. abutili sp. n. from which it is distinguished by the overall body coloration which is less dark and shape of the antennae. The fth instar larvae are diYcult to separate. In P. abutili sp. n. the sectasetae on body are more slender than in P. urenae Russell. The reference of P. urenae Russell by Vondrác Ïek (1963: 277) refers to an undescribed species (see comments under unidentied material of Paurocephala sp. Zaire #1).Published as part of Mifsud, D. & Burckhardt, D., 2002, Taxonomy and phylogeny of the Old World jumping plant-louse genus Paurocephala (Insecta, Hemiptera, Psylloidea), pp. 1887-1986 in Journal of Natural History 36 (16) on pages 1977-1978, DOI: 10.1080/00222930110048909, http://zenodo.org/record/529907
Paurocephala muiri Mifsud & Burckhardt 2002, sp. n.
No full textPaurocephala muiri sp. n. (gures 17D, 18D, 19D, H, M, 20D) Description. Species of the psylloptera type. Adult: similar to P. psylloptera diVering in the darker overall body coloration and Rs vein with 23–28 setae. Measurements and ratios as in table 2A–C. Fifth instar larva: unknown. Host plants. The material examined was collected on Ficus sp. (Moraceae) which could be the host plant. Distribution. Indonesia (Tanimbar Island). Material examined. HOLOTYPE, Indonesia: Tanimbar Island, Larat, December 1907 (F. Muir) (USNM). Dry mounted. PARATYPES. Indonesia: 1, 5, same data as holotype (BMNH, MHNG, USNM). Dry and slide mounted. Comments. P. muiri sp. n. is similar to P. psylloptera Crawford. The best character to separate the two species is the shorter setae associated with antennal rhinaria 8 and 9. The record of P. psylloptera by Crawford (1919: 149, Tenimbar Island, Larat) concerns this species.Published as part of Mifsud, D. & Burckhardt, D., 2002, Taxonomy and phylogeny of the Old World jumping plant-louse genus Paurocephala (Insecta, Hemiptera, Psylloidea), pp. 1887-1986 in Journal of Natural History 36 (16) on page 1965, DOI: 10.1080/00222930110048909, http://zenodo.org/record/529907
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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