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Ethnobotany of Dioscorea L. (Dioscoreaceae), a Major Food Plant of the Sakai Tribe at Banthad Range, Peninsular Thailand
Full text linkresearchDioscorea is the main source of carbohydrate for the Sakai tribe at Banthad Range, Peninsular Thailand. Nine subgroups of Sakai wander in this area where fifteen species of the genus have been found. Thirteen of the species are consumed by the Sakai. The remaining two species are inedible. This study investigates the Sakai population pyramid, the Sakai living areas, the species diversity and ethnobotany of Dioscorea as well as the nutritional compositions of selected Dioscorea species
Character intercorrelation and the potential role of phenotypic plasticity in orchids:a case study of the epiphyte <i>Liparis resupinata</i>
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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
Riparian plant species of Sherichhu River in Eastern Bhutan: their diversity, distribution, and ethnobotanical uses
No full textThe floristic study along the Sherichhu River was carried out to determine the riparian plant species diversity and distribution
pattern. A total of 34 study plots were laid on either side of the riverbank and recorded 72 woody species belonging
to 52 families and 61 genera. Based on ocular inspections and topography, the areas were categorised into U-shaped and
V-shaped valley. These two valleys, though differing in topography, has fostered the existence of diverse plant species in the
study area. A considerable variation in the species diversity and richness was observed between the V-shaped and U-shaped
regions based on the Shannon diversity index (P = 0.013) and species richness (P = 0.005) values. The Importance Value
Indices (IVI) were highest for Desmodium elegans, Mallotus philippensis, and Rhus paniculata in the V-shaped area and
Murraya koenigii Duabanga grandiflora and Quercus glauca had the highest IVI in the U-shaped area. Fabaceae, Euphorbiaceae,
Anacardiaceae exhibited a high family value index (FVI) in the V-shaped area, while the U-shaped area had a high
FVI for Rutaceaec, Lythraceae, Fagaceae, and Myrtaceae. Structurally, the Mallotus-Desmodium-Rhus community was
dominant in the V-shaped area, while Duabanga-Terminalia-Murraya and Quercus-glauca woodland communities were
dominant in U-shaped valley. The CCA analysis revealed that the slope and litter thickness had shown greater influence on
the plant species composition. In general, topography, micro-habitat conditions, river channel width, and flood regimes may
have influenced riparian plant species diversity and distribution patterns. Thus, identifying key plant community types and
underlying environmental conditions may help to accomplish and safeguard forest resources in the area. Riparian vegetation
along the Sherichhu River is also a habitat for medicinal plants (11 out of 72 woody species), a source of food and income
to rural communities. Thus, future studies should also focus on devising appropriate strategies for protecting and conserving
Bhutan’s riparian ecosystem from global warming
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
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