1,720,982 research outputs found
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
Desert Plants and Deserted Islands : Systematics and Ethnobotany in Caryophyllaceae
No full textBackground. Caryophyllaceae is a large and cosmopolitic flowering plant family, however the systematics of many of its basal groups has been unclear, due to a lack of unambiguous morphology. Some members of Caryophyllaceae are used medicinally, e.g. Corrigiola roots in Morocco. Monitoring the trade in medicinal plants is complicated due to the absence of useful identification characters in plant products such as roots, bark, and powders. This thesis aims at elucidating the systematics and the ethnobotany of some of the basal clades in Caryophyllaceae. Methods. A comprehensive sampling from herbarium as well as market and field collected material was used in systematic studies combining morphological investigation, molecular phylogenetic and molecular dating analyses. Results. The data show that Polycarpon is polyphyletic, that Sphaerocoma is sister to Pollichia and shows some intraspecific variation, that Sanctambrosia falls within the genus Spergularia, and that both Spergula and Spergularia are monophyletic. Preliminary data suggest that Polycarpaea is polyphyletic and should be split into three larger and several smaller genera, that the members of Paronychia subgen. Anaplonychia will need to be transferred to Herniaria to maintain monophyly, and that Caryophyllaceae emerged during the Paleocene. All the major extant lineages originated in the Oligocene and diversified later. Using molecular identification it was possible to identify around 50% of the Moroccan medicinal roots to species level and an additional 30% to genus level. Discussion and conclusions. The polyphyletic Polycarpon needs to be split into at least three separate genera, but no name changes were made pending further research. The two species of Sphaerocoma were merged into one species with two subspecies. The San Ambrosio Island endemic Sanctambrosia, the only tree-like plant in Caryophyllaceae, is probably the result of a long distance dispersal event and its woody habit and gynodioecy are probably caused by inbreeding depression. Sanctambrosia manicata is transferred to Spergularia. Molecular identification put into practice on traded medicinal roots has a somewhat lower success rate than most theoretical studies, indicating that a global barcoding database would need to include reference sequences from a broad range of populations for each species
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
Sustainable foraging of wild edible plants in Norway : a biocultural approach
Get PDFGlobally, the role of wild edible plants (WEPs) in providing culturally appropriate nutrition and food security, added economic value, and ecological benefits, is now well recognized. In Europe, the use of WEPs appears both as an ancient and on-going subsistence activity, but also as an emerging trend in high-end gastronomy and luxury foods. Yet, WEPs remain underutilized and mostly neglected, and the conservation of knowledge systems and practices associated to them is threatened. It is also unknown if there are any threats on the plant populations through harvesting. In Norway, overharvesting of some wild edible species has been observed recently around urban centres. Although research has been conducted on the documentation of traditional knowledge associated to WEPs, little is known about how new foraging practices affect biological diversity. The purpose of this study was to investigate if and when foraging activities in Norway can be unsustainable and what foraging practices may threaten plant communities. Different socio-cultural constructs around WEP harvesting were analysed, notably comparing chefs and professional foragers with amateurs. In collaboration with the Norwegian Association for Mycology and Foraging, ethnographic methods were used and 19 key stakeholders were interviewed within the Norwegian foraging community including foragers, chefs, association leaders, and conservation experts. Ethnobotanical data was collected through an online questionnaire (219 responses mainly from amateur foragers), and combined with available information on species’ ecology and their conservation status to assess foraging impact on WEPs. Results show that foraging WEPs in Norway poses no immediate threat to plant conservation, yet risks exist. These are discussed in the context of developing local guidelines for the sustainable use of WEPs in Norway in a participatory manner
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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