1,721,112 research outputs found
Xavier Vatin, Candomblé de Angola : musique rituelle afro-brésilienne
No full textCapone Stefania. Xavier Vatin, Candomblé de Angola : musique rituelle afro-brésilienne. In: Journal des africanistes, 2001, tome 71, fascicule 1. Les empreintes du renard pâle. pp. 281-282
Les dieux sur le Net. L'essor des religions d'origine africaine aux Etats-Unis
No full textCapone Stefania. Les dieux sur le Net. L'essor des religions d'origine africaine aux Etats-Unis. In: L'Homme, 1999, tome 39 n°151. Récits et rituels. pp. 47-74
Capone Stefania, Les Yoruba du Nouveau Monde. Religion, ethnicité et nationalisme noir aux États-Unis
No full textRivallain Josette. Capone Stefania, Les Yoruba du Nouveau Monde. Religion, ethnicité et nationalisme noir aux États-Unis. In: Outre-mers, tome 94, n°356-357, 2e semestre 2007. La colonisation culturelle dans l'Empire français, sous la direction de Sophie Dulucq et Colette Zytnicki. pp. 383-384
Efficient Synthesis of ortogonally protected anti-2,3-diamino acids
No full textAn asymmetric synthesis of anti-2,3-diamino acids is reported. The enolates of N,N-dibenzylated b3-amino esters were treated with di-tert-butyl azodicarboxylate (DBAD) to afford their N0,N00-di-Boc-2-hydrazino derivatives with excellent anti diastereoisomeric ratio. Final Boc removal and reductive cleavage of the hydrazino bond led to the expected 2,3-diamino esters having only one free amino group. In comparison with other asymmetric C-2 amination procedures, this method does not need the use of expensive chiral reagents and/or chiral auxiliaries, while leads to products which can be orthogonally protected
pH-Sensitive Vesicles Containing a Lipidic -Amino Acid with Two Hydrophobic Chains
No full textThe lipidic -amino acid 2-(aminomethyl)-2-pentadecylheptadecanoic acid (1) was synthesized via the alkylation of the C()-atom of fully protected -alanine. Mixed large unilamellar vesicles with a diameter between 100 and 200 nm containing POPC (1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine) and 1 at a molar ratio of 9 : 1 were prepared and found to have a surface charge which is dependent on pH. At slightly acidic pH, the vesicles were positively charged, and at alkaline pH negatively charged. Dynamic light scattering, zeta potential, and cryo-transmission electron-microscopy measurements indicated that the mixed vesicles fused at pH 4-5 with negatively charged mixed vesicles composed of POPC and POPG (9.8 : 1, molar ratio), POPG being 1-palmitoyl-2-oleoyl-sn-glycero-3-[phospho-rac-(1-glycerol)]
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
- …
