1,720,992 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
Direct pulp capping with mineral trioxide aggregate in a permanent molar: a case report
No full textSi presenta un caso clinico di incappucciamento diretto a carico di un primo molare inferiore di destra, 4.6, con esposizione pulpare in seguito a carie, di una paziente di 9 anniIl materiale scelto per l’incappucciamento è un materiale alcalino a base di mineral trioxide aggregate (MTA).Non sono stati riscontrati segni patologici né radiograficamente né clinicamente a nessuno dei controlli eseguiti a 3-6 e 12 mesi.L’elemento dentario è rimasto sempre vitale in seguito all’incappucciamento con MTA.Ulteriori investigazioni cliniche sull’utilizzo dell’MTA come materiale da incappucciamento diretto, in seguito ad esposizione pulpare per carie, dovrebbero essere eseguite
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
Trauma dento-alveolare complesso: case report.
No full textLo scopo del presente lavoro è quello di presentare un caso clinico di trauma dento-alveolare complesso interessante il gruppo frontale superiore.La paziente, C.S., di anni 22, giunge all’osservazione dello specialista trenta minuti dopo il trauma sportivo.All’esame obiettivo, con l’ausilio di esami radiografici, si riscontra avulsione di 1.2, conservato da subito in soluzione salina, e sub-lussazione, con frattura coronale non complicata, di 11.Si decide di intervenire reimpiantando l’elemento avulso, quindi splintando l’intero gruppo frontale in composito e filo ortodontico in acciaio.A distanza di una settimana si eseguono pulpectomia e medicazione con idrossido di calcio di1.2. A due settimane si esegue la terapia canalare dello stesso, e, considerata la risposta negativa al test di vitalità pulpare, la si esegue anche a carico del 1.1. Si rimuove lo split e si riscontra una stabilità fisiologica di tutti gli elementi.Si decide per una ricostruzione diretta, di tipo intercettivo, a carico del 1.1 in attesa di una situazione endodontica stabilizzata.A distanza di tre mesi non si riscontrano lesioni periapicali, né riassorbimenti radicolari, e si decide di intervenire a carico dell’ 1.1 con un restauro adesivo indiretto, garantendo un migliore risultato estetico.A distanza di sei mesi la situazione rimane costante, così come a distanza di un anno.Con questo studio si è così osservata una procedura, in linea con le indicazioni internazionali, che ha permesso di raggiungere il successo clinico, garantendo sia un risultato funzionale che estetico
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