1,721,180 research outputs found
Mischogyne elliotiana var. sericea Keay 1952
No full text2b. Mischogyne elliotiana (Engl. & Diels) Le Thomas var. sericea Keay (1952: 151) . Type: Sierra Leone, River bank, Njala, 10 Feb. 1927, Deighton 510 (holotype K! [K000198795], lectotype B!, NSW [NSW 459966]). Shrub or small tree to 5 m tall. Young taeigs, petioles, midrib above and below with a dense indumentum of white hairs 0.8 – 1.4 mm long. Petioles 5 – 12 mm long, 2 – 4 mm in diam. Leaf lamina narrowly ovate or ovate to narrowly obovate or obovate, 12 – 25 cm long, 5 – 8 cm wide, length:width ratio 2.5 – 4, apex acuminate or attenuate, acumen 2 – 4 cm long, 1.5 – 2.5 cm at base, both surfaces with a glabrescent indumentum of appressed white hairs 0.7 – 1.1 mm long, strongly coriaceous, drying matte brown, lighter below; midrib secondary veins 9 – 14. Fruit ellipsoid, constricted between seeds when dry, 4 cm long, 2 cm diam., apiculate. DISTRIBUTION. Guinea (Conakry) and Sierra Leone (Map 1). HABITAT. Lowland forest along rivers. SPECIMENS EXAMINED. GUINEA ( CONAKRY). Kindia Préfecture: Ouélia, Environs de Kindia, Bords de la Kolenté, 60 m, fl, [9°36'23" 12°37'1"], 1 May 1934, H. Jacques-Félix 465 (K!, P*) . SIERRA LEONE. Southern province: Njala, R. bank, Njala., 55 m, [8°6'31" 12°5'], 8 July 1935, F. C. Deighton 3015 (K!, SL *); ibid., 10 Feb. 1927, F. C. Deighton 510 (BM!, K!). PHENOLOGY. Flowering in February, May; Fruiting July. VERNACULAR NAME. None recorded. USES. “The old leaves lose their hairs and become hard, and are used for cleaning caps and other cloth articles.” (Deighton 510). NOTES. The larger leathery leaves generally without an acumen together with the glabrescent indumentum of long hairs on the leaves make specimens of this taxon markedly distinct from other Mischogyne elliotiana specimens.Published as part of Gosline, George, Marshall, Andrew R. & Larridon, Isabel, 2019, Revision and new species of the African genus Mischogyne (Annonaceae), pp. 1-23 in Kew Bulletin 74 (28) on pages 12-13, DOI: 10.1007/S12225-019-9804-7, http://zenodo.org/record/334504
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
Population structure and genetic diversity of Magnolia cubensis subsp. acunae (Magnoliaceae): Effects of habitat fragmentation and implications for conservation
No full textGenetic data on threatened plant populations can facilitate the development of adequate conservation strategies to reduce extinction risk. Such data are particularly important for species affected by habitat fragmentation such as Magnolia cubensis subsp. acunae, a Critically Endangered magnolia subspecies endemic to Cuba. Using genetic data from 67 individuals, we aimed to evaluate the effect of habitat fragmentation on two subpopulations in the Guamuhaya mountain range, in Topes de Collantes Protected Natural Landscape and Lomas de Banao Ecological Reserve. We characterize the structure and genetic diversity of these subpopulations, with the objective of managing their conservation more effectively. We used Landsat satellite images to determine land-cover types at the two locations and calculated indices of habitat fragmentation. For genetic analyses, we extracted DNA from the leaf tissue of individuals from the two subpopulations and used 11 microsatellite markers to genotype them. We calculated heterozygosity, allelic richness and the F-statistics, to evaluate genetic variability. The montane rainforest in Topes de Collantes was most affected by habitat fragmentation, with smaller patches of more irregular shapes, compared to submontane forest at this location and both montane and submontane forests in Lomas de Banao. Genetic diversity was higher in Topes de Collantes, but we found no genetic differentiation between subpopulations. Our findings suggest the two subpopulations can be considered a single evolutionary unit and conservation entity. We propose to use individuals from both subpopulations for reinforcement to increase the overall genetic diversity of the subspecies.[ABSTRACT FROM AUTHOR]Peer reviewedfinal article publishedCubasimple sequence repeats markersmicrosatellitesMagnolia cubensis subsp. acunae, magnoliasConservation geneticsfragmentation indice
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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