1,720,971 research outputs found
IL RITARDO DI CONSOLIDAZIONE DELLE FRATTURE : FATTORI MECCANICI
No full textFracture nonunion is a dreadful entity and can account for a high
percentage of both surgeon and patient’ s stress and frustration.
Fracture nonunion is often anticipated after a severe traumatic
injury, such as an open fracture with segmental bone loss, but it
may also make an unanticipated appearance after treatment of
a low-energy fracture that seemed destined to heal.
The most basic requirements for fracture healing include both
biological and mechanical factors. Biological factors are distinguished
as local and systemic and are physiological and pathological
condition of bone and of the whole subject. Mechanicalfactors able to determine nonunion are essentially distinguished
in quality of reduction, quality and quantity of fixation, devices
positioning. The introduction of new surgical devices is the evidence
of the understanding of biomechanical issues of bone.
Those precious innovative instruments must be known by the surgeon
in a theoretical mode; only respecting the biomechanical
rules of bone healing and applying those to his surgical practice
he could finally benefit of them and avoid the causes connected
to nonunion events
Should we use ceramic-on-ceramic coupling with large head in total hip arthroplasty done for displaced femoral neck fracture?
No full textIntracapsular femoral neck fractures are very common orthopedic injuries; total hip arthroplasty has been demonstrated to be an optimal option, but one of the major concerns remains
the fact that it may dislocate.The aim of this study is to retrospectively review patients with a
displaced intracapsular femoral neck fracture who underwent total hip arthroplasty to realize
whether the use of large-diameter ceramic-on-ceramic coupling has the potential to substantially reduce the risk of such a complication. Among 690 hip replacements performed in a
period of 8 years,we have selected 86 total hip arthroplasties done for displaced intracapsular
fracture of the femoral neck in 64 women and 22 men with a mean age at operation of 67.9
years. Ceramic-on-ceramic coupling was chosen in 38cases,a 36-mm head was used in 36 cases. At the latest follow-up,there were no cases requiring revision surgery and periprosthetic
osteolysis was undetectable.There were no cases of dislocations.New-generation ceramic-on-
ceramic bearings with heads of large diameter should therefore be considered to address the
problem of dislocation after total hip replacement is done for displaced femoral neck fracture
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
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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