1,720,956 research outputs found
New species and first records of Macunahyphes Dias, Salles & Molineri, 2005 (Ephemeroptera: Leptohyphidae) from Bahia state, Brazil
No full textAlmeida, Everlin, Mariano, Rodolfo (2015): New species and first records of Macunahyphes Dias, Salles & Molineri, 2005 (Ephemeroptera: Leptohyphidae) from Bahia state, Brazil. Zootaxa 4000 (4): 497-500, DOI: http://dx.doi.org/10.11646/zootaxa.4000.4.
A new species of the genus Hermanella Needham & Murphy (Ephemeroptera: Leptophlebiidae) from Northeastern Brazil
No full textAlmeida, Everlin, Costa, Sabrina, Mariano, Rodolfo (2016): A new species of the genus Hermanella Needham & Murphy (Ephemeroptera: Leptophlebiidae) from Northeastern Brazil. Zootaxa 4078 (1): 121-126, DOI: 10.11646/zootaxa.4078.1.1
Macunahyphes eduardoi Almeida & Mariano, 2015, sp. nov.
No full textMacunahyphes eduardoi sp. nov. (Figures 1–4) Diagnosis. The male imago of Macunahyphes eduardoi sp nov. can be distinguished from all congeners by the following combination of characteristics: 1) Forewing translucent with costal and subcostal area tinged with grey and with longitudinal vein CuP absent (Figure 1); 2) penes wide (Figure 4); 3) penes lobes with pair of elongated spines with small lateral hook-shaped projections from the base to the middle region. (Figure 2). Description. Male imago. Length: body, 3.23 mm; forewings, 2.83 mm. General coloration: thorax chestnut, legs and abdomen whitish with greyish marks. Head: yellowish tinged with black on hind and front margin, antennae pale. Thorax: pronotum yellow pale tinged completely with black except for two median bands (Figure 3), prosternum yellow pale tinged slightly with black. Mesonotum chestnut tinged with grey and suture tinged with grey; mesosternum yellowish chestnut. Metanotum chestnut with anterior region tinged with grey; metasternum yellow tinged slightly with gray. Legs: coxae and trochanters yellowish tinged with grey; femora yellowish with base tinged with grey and anterior region with black band; tibia and tarsi grayish. Wings (Figure 1): forewing translucent with costal and subcostal area tinged with grey; hind wings absent. Abdomen: terga I-VII pale tinged with grey; terga VIII-X pale yellow tinged with grey. Genitalia (Figure 4): styliger plate and penes opaque yellow, forceps whitish; styliger plate projected posteriorly as columnar base; penes wide, with pair of elongated projections with small, hook-shaped lateral expansions distributed from its base to middle region (Figure 2). Lateral filaments tinged with grey, except at joints; terminal filament pale with base grey at joints. Material examined. Holotype, male imago, Brazil, Bahia, Igrapiúna, Michelin Ecological Reserve, Pacangê River, Pacangê-Sapucaia 2 ª Ponte, 13 º 50 ’ 17.1 ’’S, 39 º 14 ’ 27.7 ’’W, 101 m, Calor, A.R. & Equipe LEAq, 21.IX. 2012 (CZNZ); paratypes, seven male imagos, same data as holotype (four specimens at MZUSP and three specimens at CZNC). Etymology. This species is dedicated to Eduardo Domínguez for being a great friend and for his contributions to the knowledge on South America mayflies. Remarks. The absence of vein CuP in the forewings, the absence of hind wings, and the styliger plate being projected posteriorly as a columnar base, allow the placement of this new species in Macunahyphes. Unlike the others species, Macunahyphes eduardoi sp. nov. has unusually-shaped penes for the genus, and this is the most important characteristic to distinguish the new species. Another characteristic in the new species is the presence of a basal swelling in segment II of the forceps, which is unlike M. australis that has the segment II flattened at base. The original descriptions of M. pemonensis and M. incognitus do not include pertinent details about the forceps, and so we do not compare them here.Published as part of Almeida, Everlin & Mariano, Rodolfo, 2015, New species and first records of Macunahyphes Dias, Salles & Molineri, 2005 (Ephemeroptera: Leptohyphidae) from Bahia state, Brazil, pp. 497-500 in Zootaxa 4000 (4) on pages 498-499, DOI: 10.11646/zootaxa.4000.4.9, http://zenodo.org/record/23520
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
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
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