1,720,973 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
The fate of fucoidan in the ocean
No full textRising carbon dioxide levels and the goals of the Paris Agreement have intensified the focus on carbon removal strategies. Blue carbon ecosystems, including mangroves, salt marshes, seagrass meadows and macroalgae are key to carbon sequestration due to their ability to store large amounts of carbon in their biomass. Unlike rooted plants, algae release dissolved organic carbon over their mucilage layer, with up to 50% of brown algae exudates consisting of fucoidan, a complex polysaccharide.
This thesis confirms the active release of fucoidan by six brown algae species. Globally, up to 0.1 Gt of fucoidan carbon is exuded annually, equivalent to 0.367 Gt of carbon dioxide. Fucoidan resists microbial degradation, aggregates and is transported to and stored inside coastal ecosystems. This research highlights the collective storage of
carbon by coastal vegetated ecosystems and emphasises that algal-derived polysaccharides are promising candidates for carbon sequestration
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
Monosaccharides quantified in porewater samples from coastal vegetated ecosystems
No full textPorewater was taken from 30 to 50 cm depths in saltmarsh, seagrass and unvegetated areas around the German Bight in 2022 and 2023. Up to 9 points per ecosystem were sampled along a transect. Polysaccharides >5kDa were upconcentrated using AMICON-filtration devide and afterwards freeze dried. Dired samples were resuspended in MilliQ-water and acid hydrolysed (1 M HCl, 24 h, 100°C). Monosaccharides were analysed using anion exchange chromatography with pulsed amperometric detection (HPAEC-PAD, ThermoFisher Dionex ICS-5000+ system equipped with a CarboPac PA10 analytical column (2 x 250 mm) and a CarboPac PA10 guard column (2 x 50 mm)), according to Engel et al. (2011)
Polysaccharide fucoidan BAM1 antibody binding in porewater samples from coastal vegetated ecosystems
No full textPorewater of saltmarsh, seagrass and unvegetated areas around the German Bight in 2022 and 2023 was sampled at 50cm depth. A transect of up to 9 points per ecosystem were sampled. Polysaccharides >5kDa were upconcentrated using AMICON-filtration device, freeze dried and dried samples were resuspended in MilliQ-water. Polysaccharides were screened for fucoidan BAM1 antibody binding using ELISA method, according to Cornuault et al. (2014)
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
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