1,721,428 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
Use of fibula free flap in mandible reconstruction: Cases reports (L’impiego del perone vascolarizzato nella ricostruzione della mandibola: presentazione dei casi clinici)
No full textFrom January 1990 to December 1991, 4 patients were treated by the authors with fibula free flap for mandible reconstruction. Two cases were oncological, 1 posttraumatic and 1 infected pseudoarthrosis. The age of the patients ranged from 25 to 54, the average lenght of the mandible defect was 12.25 cm. In 1 case the anterior arch of the mandible was reconstructed and in the other 3 cases the reconstruction involved the hemimandible including the T-M joint (1 case). No early general, local or microsurgical complications were observed. We had only 1 late complication due to the recurrence of the infection in a case of recurrent infected pseudoarthrosis. Bone fixation was obtained with K. wires (2 cases) and with miniplates (2 cases). In 1 case together with the bone flap a fair amount of F.A.L. muscle was taken to better contour the soft tissue loss. All microsurgical anastomoses were performed on the facial artery and homonymous veins. All osteotomies sites healed primarily, in 1 case osteointegrated implants have been positioned in the graft to be fitted with conventional dentures. Simmetry and contour of the mandible were judged to be good and excellent in all patients as well as mandible range of motion. Fibula free flap has the advantage of bicortical shape, ample lenght, possibility of segmentation and contour, distant location of donor site (to allow a team approach) and low donor site morbidity. For these reasons we consider it the flap of choice in mandible reconstruction expecially when the bony defect is prevalent and soft tissue loss is limited
Unusual clustering of Alu repeats within the 5'-flanking region of the human lysozyme gene
No full textWe report the nucleotide sequence of the 2.2-kb 5'-flanking region of the human lysozyme gene. Four Alu repeats are located within this upstream region. Classification and dating of these four Alu elements, as well as of the four Alu elements present within the human lysozyme structural gene, were performed. Transposition of the eight Alu repeats found in the human lysozyme locus has apparently occurred at four different times during the primate genome evolution. Considering that Alu repeats are interspersed throughout human DNA with an average spacing of 4 kb, the presence of eight such repeats within the 8-kb lysozyme gene region and, in particular, of four of them in the 2.2-kb region upstream of the structural gene, appears quite unusual. © 1993 Informa UK Ltd All rights reserved: reproduction in whole or part not permitted
The use of radial fascial flap in the reconstruction of the gliding apparatus of the upper limb nerves and tendons
No full textL'impiego del lembo radiale fasciale d'avambraccio per la ricostruzione dell'apparato di scorrimento di nervi e tendini dell'arto superiore.
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