1,721,112 research outputs found
L'Adriatico dalla tarda antichità all' età carolingia
No full textL'Adriatico come tramite fra le terre che su questo mare affacciano sta diventando in questi ultimi tempi oggetto di rinnovata attenzione e materia di riflessione per archeologi e storici che si interessano al periodo che vide la dissoluzione dell'unità imperiale romana e la genesi di un nuovo mondo pluricentrico, in cui fatti etnici e politici frazionarono la precedente integrazione ed istituirono forme diverse di aggregazione territoriale e di comunicazione economica e culturale. Le problematiche messe a fuoco e una consolidata e illustre tradizione di studi vengono rinnovate da nuovi oggetti di indagine e dalla comparazione con altre aree geostoriche
Le dame barbare e i loro invisibili mariti: le trasformazioni dell’identità di genere nel V secolo
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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
Sena Gallica: nuovi scavi a Villa Tarsi e prime considerazioni sulle fasi tardoantiche-altomedievali dell'antico centro.
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SYNTHESIS OF [2.2]PARACYCLOPHANE VIA HOFMANN ELIMINATION - A KINETIC-STUDY OF THE HOMOGENEOUS REACTION
No full textParacyclophane (PCP) and byproducts were obtained from (p-methylbenzyl)trimethylammonium hydroxide (QOH) by reaction with NaOH in concentrated water solutions. The system presents a miscibility gap: selectivities and kinetics were separately studied in a NaOH-rich ("Na") region, a QOH-rich ("Q") region, and a "dilute" region, at temperatures in the range 70-110 °C. The reaction rate is much higher in the Na region, particularly at high levels of NaOH concentration, but selectivity to PCP is better in the other regions. The dependence of the reaction rate on the alkali concentration is discussed, relating it to the poor solvation of OH- ions
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