1,720,994 research outputs found
RESORBABLE BRUSHITE BONE CEMENT WITH CONTROLLED DRUG-RELEASING CAPABILITIES
No full textNovel Brushite bone based cement with drug delivery functions has been studied by the research tea
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
Liquid-Solid Nano-Interactions Of Ceramic And Metals
No full textWetting behaviour of a low surface tension fluid as hydrophobic paraffin oil on metal and ceramic surfaces was studied at nano-scale by SPFM non contact probe analysis and at micro-scale by optical microscopy. Solid surfaces were obtained by sputtering molybdenum and aluminum over silicon wafer substrates. Bottom-up method based on vapor condensation technique was used to deposit the fluid upon the evaluated solid surfaces. Force-Distance curves showed that liquid initially disposed over all the substrates as an extremely thin, full coating, film with an apparent variable depth depending upon the evaluated solid substrates. This layer appeared to be extremely adherent and showed the features of a gel instead behaving as a proper liquid. By going on with the fluid condensation process and increasing the total amount of deposited fluid we observed the formation of nanodrops lying on and coexisting with the previously deposited film. Drop contact angles values were found characteristic of the specific solid substrate and appeared indeed to be inversely proportional to the first deposited film thickness. The fluid deposition processes were prolonged up to reach micrometric sized dimensions where the gel-like features disappeared and typical liquid features appeared. In order to reveal the status of the original nanometric liquid layer several micrometric sized drops were therefore partially or totally removed from the substrate with AFM tips. It was found that no apparent mixing occurred between these two different conditions of the same deposited fluid. To deeply explore the features of this ice-like early deposited film and to detect if the observed behavior should be more dependent upon the surface roughness or surface energetic the same samples underwent fluid vapor exposures after being treated with low surface energy silanes that created a monolayer coating. These surfaces showed a completely different behaviour. A huge formation of very similar nano-drops was immediately observed. The performed analysis shows that at the nano-scale the Young Equation does not apply satisfactorily, even in the case of extremely flat inert surfaces in contact with an inert and non polar liquid featured as a quite common basis for biological applications. © 2009 IEEE NANO Organizers
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
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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