1,720,954 research outputs found
Burmadactylus Heads 2009
No full textGenus <i>Burmadactylus</i> Heads, 2009 <p> Type Species. <i>Burmadactylus grimaldii</i> Heads, 2009</p>Published as part of <i>Fan, Shilv, Gu, Jun-Jie & Cao, Chengquan, 2023, A new species of the genus Burmadactylus Heads, 2009 from mid-Cretaceous amber in north Myanmar (Orthoptera: Caelifera: Tridactyloidea), pp. 595-598 in Zootaxa 5306 (5)</i> on page 596, DOI: 10.11646/zootaxa.5306.5.7, <a href="http://zenodo.org/record/8073323">http://zenodo.org/record/8073323</a>
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
Burmadactylus tenuicerci Fan & Gu & Cao 2023, sp. nov.
No full textBurmadactylus tenuicerci sp. nov. urn:lsid:zoobank.org:act: 0DF8451E-7121-4B2D-9328-64E458B68B8B Material. Holotype, LNU-22, gender unknown, a nearly complete specimen, including the head, prothoracic leg, mesothoracic leg, metathoracic leg and terminal abdomen. The specimen is in fair condition, covered by a large crack from the head to the end of the abdomen. Locality and horizon. Hukawng Valley, Kachin Province, Myanmar; lowermost Cenomanian, Upper Cretaceous. Description. Holotype, LNU-22 (Fig. 1), gender unknown, body 3.12 mm long measured from the head to the abdominal apex; pronotum 0.7 mm long at midline; profemur 0.6 mm long; protibia 0.5 mm long; mesofemur 1.1 mm long; mesotibia1.0 mm long; metafemur 2.1 mm long; metatibia 1.8 mm long. The specimen is in fair condition, covered by a large fissure from the head to the end of the abdomen. Head. Hypognathous, capsulate; compound eyes large and well developed; ocelli invisible; antennae moniliform, 7 segments visible, flagellomere widening towards apex, inserted beneath the lower margin of the compound eyes (Fig. 1A, D). Thorax. The thorax dark brown; pronotum large, shield-like, extending posteriorly to entirely cover the metanotum; posterior margin of pronotum broadly rounded; tegmen and hindwing absent (Fig. 1A, D). Leg. Prothoracic leg brown; profemur slender, distinctly shorter than mesothoracic leg; protibia robust, apex slightly inflated, with a sparse covering of thick setae and four strong teeth; protarsus two-segmented, slender, with second segment longer than first; basitarsus short; apical tarsomere elongate, slightly curved, with two claws. Mesothoracic leg brown; mesofemur slender, curved, over twice as long as the profemur, basally narrow and apically broad, with sparse setae on the ventral margins; mesotibia almost as long as mesofemur, middle inflated, with dorsal and ventral setae; mesotarsus almost identical to the protarsus. Metathoracic leg dark, saltatorial; metafemur slightly longer than abdomen and greatly inflated along its entire length, with prominent dorsal carina; metafemur mostly obscured by cracks, ventral with several irregularly spaced setae (Fig. 1A, D); metatibia slightly shorter than metafemur, very slender, with tiny spines on the dorsal margins, without setae, lacking swimming plates, with two small subapical spurs and longer apical spurs; metatarsus slightly over twice as long as apical spurs, with a subapical denticular process; metatarsus ventral with sparse setae (Fig. 1C, F). Abdomen. The abdomen dark brown, with sparse and long setae; dorsal of abdomen obscured by cracks; subgenital plate broad, without styli, bearing a marginal fringe of long setae; cercus long, with numerous long setae, two-segmented, the second segment longer and distinctly slender than the first; paraproctal lobe cone-shaped, relatively small, almost the same as the first segment of cercus, covered with sparse setae, one of the setae near the apex thick and long (Fig. 1B, E). Diagnosis. The new species is similar to Burmadactylus grimaldi Heads, 2009. The major differences are listed in Table 1. Etymology. The specific epithet is from the Latin ‘tenui’ and ‘cercus’, used to describe the slender and elongated second segment of cercus in Burmadactylus. Remarks. Owing to the metatarsus of this specimen with a subapical denticular process, it should be assigned in Dentridactylinae Günther, 1979. B. tenuicerci sp. nov. is distinguished from other fossil Dentridactylinae species by presence of small paraproctal lobe which are much longer (as long as the cercus) in other members of the subfamily (Azar & Nel, 2008; Poinar, 2020). This new species can be assigned to Burmadactylus Heads, 2009 by the following characters: paraproctal lobe small, conical shape; swimming plates absent; margin of subgenital plate with long setae; metatarsus slightly over twice as long as apical spurs. The differences between the new species and the type species B. grimaldii Heads, 2009 are demonstrated in the Table 1.Published as part of Fan, Shilv, Gu, Jun-Jie & Cao, Chengquan, 2023, A new species of the genus Burmadactylus Heads, 2009 from mid-Cretaceous amber in north Myanmar (Orthoptera: Caelifera: Tridactyloidea), pp. 595-598 in Zootaxa 5306 (5) on pages 596-597, DOI: 10.11646/zootaxa.5306.5.7, http://zenodo.org/record/807332
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
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
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
- …
