1,720,959 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
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
Effects of testosterone on triglycerides levels and fatty acid composition in the liver and serum of rat
No full textTriacyglycerol content and fatty acid composition has been determined in the liver and in the serum of normal, castrated and testosterone-treated rats. Most variations were found in UNS/SAT ratio, which were referred to an action of the hormone on the delta 5-delta 6-delta 9 desaturases. Results concerning the behaviour of delta 9 desaturase suggest that either different isoenzymes are involved or that a single enzyme undergoes a different regulation according to the substrate involved
Effects of testosterone on cholesterol levels and fatty acid composition in the rat
No full textThe effects of testosterone treatment on cholesterol levels and its fatty acid components were studied in adult rats. Cholesterol levels increased both in the liver and in the serum of castrated rats. Androgen administration restored the normal values only in the serum. A general decrease in unsaturated and essential fatty acids in cholesterol esters was evident after testosterone administration. In the liver, only the C16:O/C16:1 ratio clearly increased after testosterone administration, which inhibited the delta 9 unsaturation of palmitic acid, but not of stearic acid. In the serum the C16:O/C16:1, C18:O/C18:1, and C18:2/C2O:4 ratios decreased after castration and were restored by testosterone. The results indicate a clear inhibition of delta 9 unsaturation of palmitic and stearic acids, of delta 5 unsaturation and elongation in organs other than the liver. No effect was evident on delta 6 unsaturation. This suggests that fatty acid unsaturations are regulated differently by testosterone in different tissues. For delta 9 unsaturation in the liver, the effect also seems to be substrate-dependen
Medico di famiglia e psicologo insieme nello studio: un nuovo modello gestionale dove il sintomo diventa attivatore di risorse?
No full textE' ben noto che le richieste che giungono al Medico di Base, per quanto in genere espresse in forma di sintomi fisici, nascano molto spesso da problemi che necessitano di un approccio olistico, biopsicosociale. La progressiva differenziazione tra medicina e psicologia rende piuttosto problematica una collaborazione attuata mediante invio allo psicologo, sia in termini di quali pazienti vengono inviati che delle modalità di invio. L'accettazione della proposta da parte del paziente appare comunque problematica, nel momento che il contatto con uno psicologo, diversamente da quello con un medico, viene tuttora considerato socialmente come pertinente solo ad una particolare categoria di persone, e oggetto di forte stigmatizzazione.
Gli autori riferiscono di una possibile soluzione ai problemi sopra indicati in un’esperienza portata avanti dalla Scuola di Specializzazione in Psicologia della Salute dell'Università di Roma "Sapienza", mediante inserimento di uno psicologo nello studio del Medico di Base, nel consueto orario di ambulatorio, in copresenza con il medico. Questa pratica ha permesso di realizzare un approccio olistico al disagio presentato, senza la necessità di una richiesta specifica da parte del paziente. In un piccolo numero di casi, è stato proposto ed attuato un approfondimento più formale con lo Psicologo in tempi e spazi separati. I casi sono stati sempre discussi tra i due professionisti. Finora l'esperienza, che dura da 10 anni, ha coinvolto 7 studi medici a Roma, Orvieto e Rieti, e 11 psicologi specializzandi, per 3 anni ciascuno; ha mostrato di essere del tutto fattibile, pur richiedendo un certo periodo di "rodaggio " tra le due figure professionali. I pazienti hanno accolto con molto favore la presenza dello psicologo e, come era da attendersi, questa ha favorito la loro spontanea adozione di un approccio molto più ampio al proprio disagio. Viene presentato un caso clinico che illustra come la costruzione di un senso ad un sintomo possa evitare indagini fisiche inutili e costose, e facilitare una svolta significativa nella vita di un paziente
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