1,720,977 research outputs found
Constituents of the digestive gland of molluscs of the genus Aplysia. II. Halogenated monoterpenes from Aplysia limacina
No full textThe digestive gland of the sea hare A. limacina contained an array of polyhalogenated monoterpenes. The 2 major components were 3,4-erythro-7-dichloromethyl-3-methyl-3,4,8-trichloro-1,5(E),7(Z)-octatriene (I), previously isolated from pacific red alga Plocamium cartilagineum, and the new 3,4-threo-7-dibromomethyl-3-methyl-3,4,8-trichloro-1,5(E),7(E)-octatriene. Examn. of exts. of local red algae revealed that I was present in P. coccineum
Italia e Turchia tra Europa e Medio Oriente (1969-1993)
No full textQuesto lavoro indaga sulle relazioni bilaterali italo-turche negli anni Settanta e Ottanta del Novecento. Il colpo di Stato del settembre 1980 in Turchia ebbe conseguenze negative sui rapporti tra Ankara e la Comunità Europea, ma non sulle relazioni bilaterali con Roma, considerata l’importanza strategica del paese anatolico. Una posizione di convergenza si ebbe anche sulla decisione di non sostenere le sanzioni contro il leader libico Gheddafi, volute dal presidente degli Stati Uniti, Ronald Reagan. Tra la fine degli anni Ottanta e l’inizio degli anni Novanta, si cercarono nuove possibilità di collaborazione tra Italia e Turchia, sia in vista della creazione di un asse mediterraneo, con l’obiettivo di bilanciare l’asse dell’Europa centrale e settentrionale dopo l’unificazione della Germania, sia in funzione della protezione dalla pressione demografica proveniente dalla sponda meridionale del Mediterraneo, percepita come una minaccia
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
Aldo Moro e la Facoltà di Giurisprudenza dell'Università degli Studi di Bari nella transizione dal regime fascista alla Repubblica
No full textBiografia accademica di Aldo Moro con particolare riferimento alla fase della transizione dal regime fascista alla Repubblic
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
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
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