1,720,989 research outputs found
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
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
Green multi‐platform solution for the quantification of levodopa enantiomeric excess in solid‐state mixtures for pharmacological formulations
Full text linkThe aim of the present work was to develop a green multi‐platform methodology for the quantification of L‐DOPA in solid‐state mixtures by means of MIR and NIR spectroscopy. In order to achieve this goal, 33 mixtures of racemic and pure L‐DOPA were prepared and analyzed. Once spectra were collected, partial least squares (PLS) was exploited to individually model the two different data blocks. Additionally, three different multi‐block approaches (mid‐level data fusion, sequential and orthogonalized partial least squares, and sequential and orthogonalized covariance selection) were used in order to simultaneously handle data from the different platforms. The out-come of the chemometric analysis highlighted the quantification of the enantiomeric excess of L‐ DOPA in enantiomeric mixtures in the solid state, which was possible by coupling NIR and PLS, and, to a lesser extent, by using MIR. The multi‐platform approach provided a higher accuracy than the individual block analysis, indicating that the association of MIR and NIR spectral data, espe-cially by means of SO‐PLS, represents a valid solution for the quantification of the L‐DOPA excess in enantiomeric mixtures
Pretreatment strategies of titanium substrates to modulate the electrochemical properties of CVD-grown Ti-doped diamond electrodes for dopamine detection
Full text linkThe identification of highly sensitive materials able to combine performance stability, relatively low cost, controllable and large area fabrication process is still a major bottleneck in the scientific community. Dopamine is considered a key indicator to monitor cardio and cerebrovascular diseases and its redox activeness makes electrochemical detection the most straightforward and promising sensing approach. Here we report the realization, by a simple yet effective approach, of diamond-based electrodes with a native selectivity towards dopamine. In details, three different substrate pretreatments, i.e., lapping, electropolishing and chemical etching, are adopted to tailor the morphological, structural, and sensing features of titanium doped diamond layers. SEM, AFM, Raman spectroscopy, XRD, XPS and I-V analyses demonstrate the features' modulation of the diamond layers being crucial for electrochemical and sensing performances, as confirmed by dopamine selectivity under ascorbic and uric acid interferents' excess. Furthermore, the controlled introduction of oxygen-containing groups enhances the dopamine sensitivity, lowering the detection limit from 6000 to 600 nM. In addition to giving an important insight on the physical-chemical growth processes, these preliminary results pave the way for the exploitation of these materials in a wide range of sensing applications, thanks to the non-toxicity and high surface tunability without post-synthesis treatments
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
- …
