1,721,487 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
Benzannulation of substituted 3-alkoxycarbonylhex-3-en-5-ynoic acids: a new route to 4-substituted 3,5-dihydroxybenzoic acids derivatives
No full textBaker's yeast mediated enantioselective synthesis of the bisabolene sesquiterpenes (+)-epijuvabione and (-)-juvabione
No full textEnzyme-mediated preparation of enantiopure p-menthan-3,9-diols and their use for the synthesis of natural p-menthane lactones
No full textAppropriate 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
Synthesis of the enantiomeric forms of alfa and gamma-damascone starting from commercial racemic alfa-ionone
No full textBaker's yeast-mediated enantioselective synthesis of the bisabolane sesquiterpenes (+)-curcuphenol, (+)-xanthorrhizol, (-)-curcuquinone and (+)-curcuhydroquinone
No full textIl commercio dei cereali. Conoscerne il funzionamento per interpretarne le dinamiche
No full textIl valore del commercio dei cereali rappresenta, a tutt'oggi, la metà degli scambi complessivi di prodotti agroalimentari che si realizzano nel mondo.
Lo studio vuole offrire un duplice approccio: inizialmente propone un'analisi statistica ed economica dei problemi del comparto cui segue una visione d'insieme degli aspetti operativi affrontando gli aspetti contrattuali e di mercato.
Partendo dall'analisi dello scenario mondiale, europeo ed italiano della domanda e offerta dei cereali, vengono evidenziati gli aspetti più critici e le variabili (endogene ed esogene) che influenzano il mercato cerealicolo.
Infine vengono approfonditi gli aspetti che caratterizzano e regolano la commercializzazione sul mercato interno e su quello estero
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