1,721,175 research outputs found
Méthode simple pour évaluer l'activité de substances solubles ou émulsionnables
No full textCoudertet J., Doucet J-Cl. Méthode simple pour évaluer l'activité de substances solubles ou émulsionnables. In: Bulletin mensuel de la Société linnéenne de Lyon, 19ᵉ année, n°2, février 1950. pp. 36-38
Contribution à l’étude de l ’hémodynamique cardiaque La radiocardiographie — Essai chez le cheval
Full text linkLemaire G., Doucet J. Contribution à l’étude de l’hémo-dynamique cardiaque. La Radiocardiographie — Essai chez le cheval. In: Bulletin de l'Académie Vétérinaire de France tome 121 n°8, 1968. pp. 319-323
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
Investigation of the influence of protein corona composition on gold nanoparticle bioactivity using machine learning approaches
No full textThe understanding of the mechanisms and interactions that occur when nanomaterials enter biological systems is important to improve their future use. The adsorption of proteins from biological fluids in a physiological environment to form a corona on the surface of nanoparticles represents a key step that influences nanoparticle behaviour. In this study, the quantitative description of the composition of the protein corona was used to study the effect on cell association induced by 84 surface-modified gold nanoparticles of different sizes. Quantitative relationships between the protein corona and the activity of the gold nanoparticles were modelled by using several machine learning-based linear and non-linear approaches. Models based on a selection of only six serum proteins had robust and predictive results. The Projection Pursuit Regression method had the best performances (r2 = 0.91; Q2loo = 0.81; r2ext = 0.79). The present study confirmed the utility of protein corona composition to predict the bioactivity of gold nanoparticles and identified the main proteins that act as promoters or inhibitors of cell association. In addition, the comparison of several techniques showed which strategies offer the best results in prediction and could be used to support new toxicological studies on gold-based nanomaterials
Computational approaches for the prediction of the selective uptake of magnetofluorescent nanoparticles into human cells
No full textThe use of functionalized nanomaterials is of high importance in biomedical applications like the efficient targeting of cancer cells. This paper proposes a comparison of different statistical and mechanistic aspects of new QSAR models generated to predict the selective uptake of a library of surface modified nanoparticles tested in different human cell types. Additionally, a new approach based on the combination of multivariate factorial analysis and QSAR is proposed to generate a 2-dimensional map of the selective uptake of the surface modified nanoparticles into multiple cell types. This map offers an immediate view of the uptake of the nanoparticles, distinguishing among those with high or low uptake in one or more of the studied cells. Finally, QSAR models are generated to predict the coordinates of the studied nanoparticles in the 2D map from their molecular structure. This predictive map is useful to screen new and existing surface modified nanoparticles for diagnostic and biomedical uses
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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