1,720,956 research outputs found
The TACK knee prosthesis. Analysis of a uniform case series
No full textWe implanted the total arthroplasty knee or TACK prosthesis in 40 patients with degenerative osteoarthritis. We used the same surgical technique in all patients. Full extension and flexion more than 90 were achieved in all 40 knees. All patients obtained a HSS score of more than 88 points.
The results confirm that the TACK prosthesis provides excellent results in patients with degenerative osteoarthritis
if there is no significant bone loss, serious ligament laxity or extensive deformatio
La lussazione nelle artroprotesi totali d'anca
No full textLa protesisazzione dell'anca è un intervento che viene eseguito con sempre maggiore frequenza e ciò dipende da fattori come l'aumento di vita media della popolazione, la possibilità di intervenire su casi di maggiore complessità grazie al miglioramento dei disegni e dei materiali ed al diffondersi della cultura protesica. Tuttavia riprodurre completamente un complesso articolare in tutte le sue componenti è impossibile e cià dà vita a complicanze e nuove patologie. Scopo di questo lavoro è fare una analisi di queste complicanze
Protesi oggi e stato dell'arte
No full textL'artrire reumatoide con la sua aggressione poliarticolare conduce precocemente i pazienti ad una precoce infermità. Le terapie conservative oggi in uso hanno favorito la remissione ei sintomi e della limitazione funzionale ma non consentono una normale cinematica articolare per le gravi deformità presenti; la chirurgia protesica si impone come proposta sostitutiva. Questo lavoro ne esplora le problematiche..
L'artrosi e la lesione del legamento crociato posteriore
No full textLe condizioni dei tessuti di una articolazione ed in particolare della cartilagine del ginocchio è conseguenza del corretto funzionamento e dell'equilibrio biomeccanico delle strutture deputate alla sua funzione. Sono note infatti le sequele degenerative della cartilagine dopo meniscectomia ed in caso di insufficienza del legamento crociato anteriore (LCA). Scopo di questo lavoro è verificare la incidenza di fatti artrosici insorti in soggetti con lesione cronica del legamento crociato posteriore (LCP) e di valutare quegli aspetti biomeccanici che giustificano tale sequela degenerativa
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
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