1,720,957 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
Unicompartmental osteoarthritis: High survival rate with a combined mechanical and biological salvage approach as alternative to metal resurfacing: Results at minimum 10 years of follow‐up
Full text linkPurpose: The aim of this study was to prospectively evaluate the long-term clinical results and failure rate of patients treated with complex salvage procedures using a combined mechanical and biological approach to address unicompartmental knee osteoarthritis (OA) and postpone the need for joint replacement. Methods: Thirty-nine patients (40.3 ± 10.9 years old) affected by unicompartmental OA (Kellgren–Lawrence 3) in stable joints underwent a personalized surgical treatment depending on the specific requirements of the affected compartment, including high tibial osteotomy, osteochondral scaffold, meniscal scaffold and meniscal allograft transplantation. Patients were evaluated with the International Knee Documentation Committee (IKDC), Visual Analogue Scale (VAS) and Tegner scores before surgery, at 3 years and a minimum of 10 years of follow-up. Results: A significant improvement was observed over time in all scores but worsened at the final follow-up. The IKDC subjective score improved from 46.9 ± 16.2 to 79.8 ± 16.4 at 3 years (p < 0.0005) and then decreased to 64.5 ± 21.4 (p = 0.001) at 12 years. A similar trend was confirmed for VAS and Tegner scores. Only two patients subsequently underwent knee arthroplasty, and nine more patients were considered clinical failure, for a cumulative surgical and clinical failure rate of 28.2% at the final follow-up. Conclusion: A personalized, joint-preserving, combined mechanical and biological approach, addressing alignment as well as meniscal and cartilage lesions, is safe and effective, providing a clinical benefit and delaying the need for arthroplasty in young patients affected by unicompartmental knee OA. At the final evaluation, the clinical improvement decreased, but more than two-thirds of the patients still benefited from this treatment at a long-term follow-up. Level of Evidence: Level IV case series
Current trends in the medial side of the knee: not only medial collateral ligament (MCL)
No full textThe medial collateral ligament (MCL) is by far the most commonly injured ligament of the knee. The medial ligament complex covers a broad bony surface on the extraarticular portion of the femur and is highly vascularized, which allows for a high healing potential. For this reason, most MCL complex lesions were treated conservatively in the past. However, recent advancements regarding the MCL anatomy and kinematics highlighted the complex biomechanical behavior of the isolated and combined MCL lesion, and it is now fully appreciated that some MCL lesions warrant surgical treatment. The present review aims to provide the reader with an overview of the new evidence and advancement on the complex anatomy, biomechanics, and treatment of the MCL
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
Medial hinge fracture after closing wedge high tibial osteotomy: Proposing a new classification and risk factor analysis of a neglected complication
No full textPurpose: Contralateral hinge fracture is one of the most common complications of medial opening wedge high tibial osteotomy (HTO), however, this complication has been poorly investigated after closing-wedge HTO (CW-HTO). The primary aim of this study was to describe the incidence and characteristics and propose a classification system of medial hinge fracture (MHF) after CW-HTO. The secondary aim was to identify demographic and surgical factors that predispose to MHF. Methods: Consecutive patients who underwent CW-HTO for varus malalignment performed at a single institution were retrospectively screened for eligibility. Preoperative data were retrieved from medical charts, while incidence and type of MHF were evaluated on postoperative X-rays. To determine risk factors for MHF, a series of univariate logistic regression were performed using demographic and radiological data as independent variables, using a generalised linear mixed model (GLMM). Variables that demonstrated a significant difference (p < 0.1) in univariate analyses were defined as independent variables and were used as covariates in a multivariate analysis with the same dependent variables RESULTS: A total of 137 knees were included in the study. The incidence MHF fractures was 57% and three distinct types of fractures were identified. The most common fracture type was the two fragment one, with its subtypes "linear" (31%), "distal" (9%) and "proximal" (8%). A "third fragment" MHF was identified in 7% of cases, while "intra-articular" pattern was observed in 2%. Multivariate analysis showed that increased distance between the end of the osteotomy line up until the medial tibial plateau and decreased length of the osteotomy line were significantly associated with higher probability of MHF: respectively OR (odds ratio) 2.8 [1.20-6.78] (p = 0.018) for the former and OR of 0.35 [0.16-0.77] (p = 0.009) for the latter. Conclusion: MHF is a common complication after CW-HTO, and all the risk factors appear to be related to the osteotomy line: higher MHF incidence was associated with an increased distance from the medial plateau and reduced depth of the cut. Both these parameters are clinically relevant as they are modifiable. Level of evidence: Level IV
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
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