1,721,075 research outputs found
La fissazione esterna: tecnica mini-invasiva nella traumatologia delle ossa lunghe.
No full textObiettivo del nostro lavoro è dimostrare perché la fissazione esterna sia oggi da considerare una tecnica mininvasiva nel trattamento in acuto delle fratture delle ossa lunghe.
Il fissatore esterno infatti si applica per via percutanea, con incisioni cutanee molto limitate, con invasività minima a carico dei tessuti molli che rimangono aggredibili per eventuali trattamenti successivi.
L’applicazione è sempre facile, per il numero esiguo di componenti da montare. La rimozione è sempre agevole e quasi sempre non dolorosa. Inoltre il tasso di infezioni da elemento di presa è diventato oggi molto basso, e quando si verifica è sempre facile da risolvere. La procedura rispetta le strutture periostali e vascolari, perché l’impianto realizza la presa ossea lontano dal focolaio di frattura, consente la riduzione per manovre esterne. Proprio per questi motivi favorisce la formazione di callo osseo naturale di origine periostale.
La tecnica dovrebbe trovare indicazione nel trattamento delle fratture diafisarie delle ossa lunghe, specialmente di tibia ed omero, ad alta e bassa energia, nel trattamento delle fratture chiuse epifiso-metafisarie di radio e tibia e nelle fratture esposte, sia come trattamento definitivo che temporaneo.
In 24 mesi, abbiamo realizzato 177 montaggi, 152 definitivi e 25
temporanei. Dei definitivi è giunto a consolidazione senza problemi, in tempi normali, senza variazioni dell’asse anatomico, il 99,3%. Nel 10,5% è residuata una modesta riduzione articolare post rimozione, nel 2% si è verificata perdita di riduzione, nel 3,3% episodi di infezioni superficiali, nessun fenomeno di infezione profonda e rottura degli elementi di presa. Negli impianti temporanei, abbiamo osservato, il 12% di infezioni superficiali, nessun fenomeno di infezione profonda e rottura degli elementi di presa, non si sono mai verificati fenomeni infettivi nel passaggio ad altri mezzi di sintesi
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Textiles in Ritual and Cultic Practices in the Ancient Near East from the Third to the First Millennium BC
No full textAutomatic web accessibility metrics: where we are and where we can go
No full textThe fact that several web accessibility metrics exist may be evidence of a lack of a comparison framework that highlights how well they work and for what purposes they are appropriate. In this paper we aim at formulating such a framework, demonstrating that it is feasible, and showing the findings we obtained when we applied it to seven existing automatic accessibility metrics. The framework encompasses validity, reliability, sensitivity, adequacy and complexity of metrics in the context of four scenarios where the metrics can be used. The experimental demonstration of the viability of the framework is based on applying seven published metrics to more than 1500 web pages and then operationalizing the notions of validity-as-conformance, adequacy and complexity. Our findings lead us to conclude that the Web Accessibility Quantitative Metric, Page Measure and Web Accessibility Barrier are the metrics that achieve the highest levels of quality (out of the seven that we examined). Finally, since we did not analyse reliability, sensitivity and validity-in-use, this paper provides guidance to address them in what are new research avenues
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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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