1,720,960 research outputs found
Ossification of vascular pedicle in fibular free flaps : a report of four cases
No full textThe fibular free flap is the most widely used flap for jaw reconstruction. Flap contouring requires removal of bone excess in the proximal segment by a subperiosteal dissection, preserving vascular connections between the pedicle and the bone and leaving well vascularized periosteum attached to the vascular pedicle. Among about 100 reconstructions with fibular flaps, 4 cases were observed of abnormal ossification along the vascular pedicle. Periosteum preserves its osteogenic capability after transposition, especially in a revascularized flap; this characteristic, together with the direct contact with the bone, allows the possibility of new bone formation along the pedicle. It would appear necessary to change the technique of reducing fibular excess, with removal of periosteum together with the bone, in order to avoid the complication described
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
O-2614 EXTRA-PLATYSMATIC FIXATION OF BISPHOSPHONATE–RELATED MANDIBULAR FRACTURES: A SUGGESTED TECHNICAL SOLUTION
No full textBisphosphonate-related osteonecrosis of the jaws (BRONJ ) is an evolving epidemic the maxillofacial surgeon is dealing with.
The causes of this disease are not fully understood; the most widely accepted etiopathological hypothesis is that in certain individuals bisphosphonates increase trabecular bone density to the point of inducing vascular insuffi- ciency with a consequent bone necrosis.
The current focus is on prevention and only conservative symptomatic treatment are advised.
When BRONJ occurs most surgeons agree with the simple removal of the necrotic bone.
Unfortunately sometimes conservative treatments aren’t successful, and the disease inexorably evolves to a clinical situation with the need of a more complex management.
The necrosis can evolve and produce an extraoral fistula and osteolysis extending to the inferior border and some- times a mandibular fracture may occur.
In the literature there are few reports of the treatment of pathological mandibular fracture caused by BRONJ .
This clinical situation usually occurs in oncologic patients in poor general conditions and the aim of the surgical treatment in generally limited to pain control, and allow- ance of feeding.
The local situation of BRONJ related fractures may pre- vent traditional open surgery with direct position of stabi- lization by plates because of the high risk of a further reduction of vascular flow to the bone stumps. Moreover the rigid fixation is likely to fail because of plate and screw infection due to the infection usually present into the surgical field. Under these conditions healing of the fracture is impaired and maintenance of infection almost guaranteed.
We present an useful surgical technique for the stabiliza- tion of BRONJ related mandibular fractures applying an extra-platysmatic reconstructive plate.
With this technique the healing of bone fracture is not achieved but the plates fixed with this technique are stable and may not get infected, while patients are pain free and can eat easily , with a great improvement of their quality of life
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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