1,720,966 research outputs found
Utilizzo di matrice biologica rigenerante (Hyalomatrix®) nel trattamento di una perdita di sostanza traumatica a tutto spessore in età pediatrica
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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
Antibiotic therapy of transaxillary augmentation mammoplasty.
No full textBackground: Capsular contracture is the most
common complication and the main cause of dissatisfaction
after augmentation mammoplasty, for both the patient and
the plastic surgeon. The formation of fibrous tissue around
the prosthesis alters the form or the consistency of the
implant, thus modifying the breast shape, its contour and its
softness. The initial satisfaction with the achieved aesthetical
result is then transformed into great dissatisfaction, due to
the presence of a shapeless and undesired mass. Patients and
Methods: The following study considered data collected
between 1998 and 2007. Sixty-seven female patients (aged
between 35 and 53 years) who suffered from mammary
hypotrophy and had undergone submuscular augmentation
mammoplasty were enrolled. All the implanted prostheses
were round and texturized, with a volume of 250 cm3 to 450
cm3. The patients underwent pre-, intra- and postoperative
antibiotic therapy in order to prevent clinical and subclinical
infection of the implants. Results: The follow-up ranged from
a period of two to nine years. All patients were examined
during the first antibiotic administration and again
subsequently, after 1, 3, 6 and 12 months, to evaluate the
results in terms of capsular contracture. Of all patients, 90%
presented a degree I Baker’s classification, the remaining
10% a degree II. Not one of the patients treated showed
grade III or IV capsular contracture nor was there any need
to remove the prosthesis during the examination period.
Conclusion: It is clear that a main role in capsular
contracture is played by the infectious process, with the
activation of specific inflammatory cells. Interfering with the
infectious process can prevent fibrotic reaction evolving into
capsular contracture. Although the process causing capsular
contracture is multifactorial, our study showed a favourable
response can be achieved when using antibiotic therapy
associated with the transaxillary approach
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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