1,721,031 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
Characterization of Ercolano ancient Roman glasses by ESR and Colorimetry and comparison with samples from sites of North-Eastern Italy
No full textMid-term results of isolated posterolateral corner reconstruction
Full text linkIsolated posterolateral corner (PLC) tears are relatively rare events. Various surgical techniques to treat posterolateral knee instability have been described; because surgical results are very much linked to cruciate reconstructions to date it is difficult to define whether one surgical procedure has better prognosis than another. The goal of this study is to determine the clinical outcome of PLC reconstruction following fibular-based technique. MATERIALS AND METHODS: We retrospectively evaluated a case series of patients who had received isolated PLC reconstruction between March 2005 and January 2007. 12 patients were surgically treated for isolated injuries and 10 patients were available for follow-up (9 male/1 female), the average patient age was 27,4 years (range: 16-47 years). Exclusion criteria were: ACL/PCL deficient or pregressive ligaments reconstruction. The patients were referred for surgical consideration after it was determined that the nonoperative physical therapy had failed. The associated injury included 3 meniscus tears, 2 patellar chondropathy; no patients at time of injury had fracture associate. All patients were treated following the fibular based technique: double femoral tunnel was performed on six patient, while in the remaining four patients, the reconstruction of the PLC was performed with a single femoral tunnel. The choice of the graft was based upon the availability of allograft material. However, for all patients, the semitendinous graft was used. All patients had the same evaluation and the same rehabilitation protocol. RESULTS: The mean follow up period was 27,5 months (range 18-40). The mean ROM was 143,5° for the flexion (range 135°-150°) and 0,5° for the extension (range 0°- 3°). Any failure of the graft and any surgical complication was observed at follow-up. Three patients showed a 1+ at the varus stress test while at the Dial Test other 3 patients showed a 10° reduction of the extra-rotation compared with controlateral knee. The average Lysholm knee score was 94 points (range 83-100) and the mean IKDC subjective result was 88,48 (range 74-96,5). Based on Lysholm knee scoring system, the results were excellent in 8 knees, good in 2 knees. At the IKDC evaluation, 2 patients were grade A and 8 were grade B. The main VAS score for pain rating was 0,85 (range 0-3). CONCLUSIONS: These results show the effectiveness of reconstruction of PLC following fibular-based technique, suggesting that PLC can adequately restore the joint stability and the knee pain. Single or double femoral tunnel does not affect the final clinical result and the patient’s satisfaction. We suggest that fibular-based technique should be used for PLC reconstruction as this surgical procedure can restore the varus stability and the knee function with good patient compliance and without significant surgical complications
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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