1,721,060 research outputs found
Aspidium ghiesbreghtii E. Fourn.
No full text3. Aspidium ghiesbreghtii E. Fourn. Mexicanas Plantas 1: 94 (1872). PROTOLOGUE. —« Absque loco (Schiede in herb.Mus. Par.); Orizaba (Bourg. n°3615); in terra temperata (Ghiesbr. n°407).». LECTOTYPE (désigné ici). — Mexique. Dans les montagnes en terre tempérée, 1844, Ghiesbreght 407 (lecto-, P[P00643574]!). SYNTYPES. — Mexique. Orizaba, 1865, Bourgeau 3615 (syn-, P[P00643573]!); s.loc., Schiede s.n., (syn-, P[P00643572]!). AIRE DE RÉPARTITION (d’après Mickel & Smith 2004). — États-Unis (Floride), Mexique, Amérique centrale, Grandes Antilles, Amérique du Sud (Colombie, Équateur). REMARQUE Ces trois spécimens sont bien annotés de la main d’E. Fournier, mais notre choix s’est porté sur le spécimen Ghiesbreght 407 comme lectotype, car il constitue le matériel le plus complet pour ce taxon. Les spécimens Bourgeau 3615 et Schiede s.n. ont été déterminés comme Thelypteris resinifera (Desv.) Proctor par A.R. Smith en 1976. Aspidium ghiesbreghtii E. Fourn. est actuellement considéré comme synonyme de Thelypteris resinifera (Desv.) Proctor par Smith (1981, 1983) et par Mickel & Smith (2004). Nous confirmons cette synonymie.Published as part of Cremers, Georges, Flament, Grégoire & Boudrie, Michel, 2016, Lectotypification de dix taxons de ptéridophytes d'Amérique tropicale, essentiellement pour l'herbier de Paris (P), pp. 9-14 in Adansonia 38 (1) on page 10, DOI: 10.5252/a2016n1a1, http://zenodo.org/record/459891
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
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
Characterization of an Ascochyta disease of the invasive vine Araujia hortorum E. Fourn. (Apocynaceae)
No full textAraujia hortorum E. Fourn. is native to South America, where it is a valued species. In contrast, in other parts of the world where it was introduced as an ornamental, it has become an invasive weed. In New Zealand, it has been targeted for biological control, and this motivated field surveys for fungal pathogens in its native range in Argentina. The etiology of a frequently encountered disease was studied. Affected plants showed round necrotic leaf spots, and sometimes defoliation. Pathogenicity tests were conducted, and Koch´s postulates were completed. Ascochyta araujiae Speg. was identified as the causal agent. Through inoculation tests conducted on other species within the Apocynaceae it was shown that this pathogen is not highly specific. All five non-target species tested were found to be susceptible to the disease.Fil: Ramirez, Gustavo Hernán. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; ArgentinaFil: Anderson, Freda Elizabeth. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentin
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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