1,720,958 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
Aesthetic restoration in maxillo-mandibular malformations: the role of genioplasty
Full text linkAim: The aim of this study was to determinate how orthognatic surgery aids to cure many skull and face abnormalities and to help re-establishing the correct occlusive relation thanks to the repositioning of the maxillo-mandibular skeleton basis.
Methods: The study included 183 male patients and 338 female patients, with an average age of 23 years. The sample series was divided according to specific pathologies. All patients underwent surgical procedures and the therapeutic strategy was determined based on the anomalies presented.
Results: 113 patients had a II class dental skeletal occlusion, 180 patients had a III class dental-skeletal occlusion and 222 patients had skull-facial abnormalities. 5 patients underwent only a genioplasty, 82 patients underwent a genioplasty associated with BSSO, 175 patients underwent a genioplasty associated with Le Fort I osteotomy and the remaining 253 patients underwent a genioplasty associated with BSSO and Le Fort I osteotomy.
Conclusion: The experience shows that genioplasty has been successfully introduced in orthognathic surgical therapeutic procedures, for dental-skeleton abnormalities and mandibular asymmetries treatment. In recent years, the evolution of computer systems has allowed an accurate assessment and programming, by means of the three-dimensional display, which are of great help in the course of diagnosis and evaluation of the displacements to be carried out, in order to obtain optimal aesthetic results
Craniofacial trauma in adolescents: Incidence, etiology, and prevention
No full textBackground: The lack of a common agreement on the precise meaning of the term "adolescence" makes it difficult to interpret the literature regarding fractures in this age group. Methods: The records of all patients with craniofacial trauma admitted to the Division of Maxillo-Facial Surgery of the Rome "La Sapienza" University Hospital between February 2001 and August 2004 were reviewed retrospectively. Besides the anatomical site of the fracture, the authors also reviewed in the group of adolescent fractures the cause, complications, and the safety devices employed and their effectiveness. Results: Of 601 patients admitted after facial or craniofacial fractures, 96 were between 11 and 19 (15.97%). The most frequent cause of fracture in this age group was motorcycle crash (39/96), followed by car crash (26/96), sporting accident (15/96), attacks (11/96), microcar crash (2/96), accidental fall (2/96), and firearm trauma (1/96). Only three patients wearing a full-face helmet suffered facial fractures; the most severe fractures with neurosurgical complications occurred in patients without a helmet; the majority of facial fractures occurred in patients wearing an open-face helmet. Conclusions: It is universally agreed that the primary cause of fracture is road collisions and, although car crashes prevail in all other age groups, motorcycle crashes are more frequent in adolescents. It is necessary to emphasize the need for protective devices capable of avoiding not only neurosurgical complications but also maxillofacial fractures (full-face helmet)
Management and treatment of sinonasal inverted papilloma
Full text linkAims: The aim of this paper is to describe the surgical experience of 35 patients with Inverted Papilloma (IP) of paranasal sinuses and its recurrence rate after a year of follow-up.
Materials: A retrospective chart review was performed on patients presenting with IP of paranasal sinuses. Thirty-five patients comprised the focus of this study. For all patients was performed a pre-surgery TC, and for more 5 patients it was necessary to perform a Magnetic Resonance (MR) with gadolinium.
Results: Among 35 patients selected, 18 patients underwent to open surgery, 4 patients had a combined approach with endoscopy and open surgery, while 13 patients were managed only with an endoscopic approach, with a minimum of 1 year of follow-up. Our results highlighted that the global percentage of success 12 months after the treatment was 93% and it not vary according to the tipology of the approach used if a radical excision of the lesion is achieved. More in depth, among 35 cases, only 2 patients were found to have recurrences and were treated with coronal and endoscopic approach.
Conclusion: It is fundamental to underline that surgery must be carried on in a radical manner to treat these tend to recur. A complete removal of the lesion and bone peripheral border filing are essential to perform a correct and definitive treatment. Also, endoscopic approach can be taken into account when tumors are localized median to a sagittal plan crossing the orbit median wall and when they did not massively compromised paranasal sinus walls
The role of fillers in aesthetic medicine: medico-legal aspects
Full text linkIn recent years there has been an exponential increase of fillers use in aesthetic medicine. The popularity of this anti-wrinkle product is based on their capacity to offer significant improvement in the aesthetic field, particularly to skin rejuvenating processes with non-invasive and less expensive techniques, if compared to the surgical methods (i.e. surgical lifting). The great number of fillers on the market is composed of a large heterogenic number of biomaterials. The aim of this review was to provide an overview and a classification of the filling materials that are most commonly used. A synthesis of the literature concerning fillers and related side effects was also reported. The law decree no. 23 of 1998, converted in the law no. 94 of 1998 and the principal judgments of the Italian Court of Cassation have been examined with the medico-legal issues related to fillers use in medicine. With respect to their degradation, filler materials may be classified as temporary (degradable), semi-permanent and permanent (not degradable). The temporary fillers such as hyaluronic acid and collagen are completely degraded by the surrounding tissue in a few months. The permanent fillers, such as the ones derived from silicon oil and minerals are not biodegradable and may cause serious and irreversible side effects. Their use requires a physician with a high level of specialization to perform the treatment, a deep knowledge of face anatomy and a great degree of experience
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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