1,721,019 research outputs found
Scutellaria rechingeri Sosef & Meerts 2022, nom. nov.
No full textScutellaria rechingeri Sosef & Meerts, nom. nov. Scutellaria polyadenia Rech. f., Rechinger (1955: 24), nom. illeg., non S. polyadena Briq. in Durand & De Wildeman (1898: 56). Type:— AFGHANISTAN. Daulatshah, 7000ft, 31 May 1937, W. Koelz 11641 (holotype: W! [stable ID: https://w.jacq.org/ W19660021757]; isotype: US! [barcode: US00119473]).Published as part of Sosef, Marc S. M. & Meerts, Pierre, 2022, A new name for a Scutellaria (Lamiaceae) endemic to Afghanistan, pp. 114 in Phytotaxa 547 (1) on page 114, DOI: 10.11646/phytotaxa.547.1.11, http://zenodo.org/record/655692
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
The genus Idertia (Ochnaceae)
No full textBackground and aims - The genus Idertia belongs to the subfamily Ochnoideae, tribe Ochneae, subtribe Ouratinae. This paper aims at a full taxonomic revision and a critical evaluation of the taxonomic position of the genus along with its diagnostic characters. Methods - All characters are studied using 73 herbarium collections of the following herbaria: B, BM, BR, BRLU, COI, EA, G, K, MO, P and WAG. Specimen data were managed using the BRAHMS herbarium management software. Key results - Idertia is characterized by a gynobasic style, apocarpous fruits, ten stamens, persistent and accrescent sepals and intra-axillary fused stipules. It shares these features with its African relatives Campylospermum and Rhabdophyllum, but its axillary inflorescence, smooth anthers and straight cotyledons renders it distinct. The latter feature is reminiscent of the South American relative Ouratea which lacks the persistent sepals and has free lateral stipules. Other diagnostic characters of the wood, leaves, inflorescence, flowers and fruits are discussed. A key to the four genera of the subtribe Ouratinae is provided. The correct author combination for the name Ouratinae is (Engl.) Kanis. The variation amongst the four species of Idertia recognized by other authors was studied carefully and deemed continuous. Only a single, though variable species distributed from Guinea to Uganda is recognized. A full taxonomic treatment is provided and two lectotypes are designated. Conclusions - Idertia is a well-defined and sufficiently distinct monotypic genus
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
Taxonomic novelties in Central African grasses (Poaceae), Paniceae 1
No full textBackground and aims – Within the framework of the renewed production of the Flore d'Afrique centrale, a manuscript will be prepared on the grasses. Taxonomic novelties, or other information not deemed appropriate in a Flora, will be published in a series of separate papers of which this is the first. The history of research on Central African grasses is briefly sketched.Methods – Standard herbarium techniques have been applied to material from BR, BRLU, GENT, LG and WAG. Some types were studied through the JSTOR Global Plant facility.Key results – Novelties are presented for the genera Acroceras, Axonopus, Paspalum and Urochloa (incl. Brachiaria ). Ten new combinations are made. Lectotypes are designated for thirteen names. Eleven names are treated as new synonyms of existing species names, with discussions on the new taxonomic concepts applied. Four species represent new records for the Democratic Republic of the Congo
M.M.J. van Balgooy, Y.W. Low & K.M. Wong (2015) Spot-characters for the Identification of Malesian Seed Plants: A Guide
No full textM.M.J. van Balgooy, Y.W. Low & K.M. Wong (2015) Spot-characters for the Identification of Malesian Seed Plants: A Guid
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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