306,054 research outputs found

    Going Beyond Counting First Authors in Author Co-citation Analysis

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    The 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

    Dispelling the Myths Behind First-author Citation Counts

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    We 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

    Conservative Treatment of Hemorrhoidal Disease

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    Background: Hemorrhoids are vascular cushions underlying the distal rectal mucosa and contributing to approximately 15-20% of the resting anal pressure with a complete closure of the anal canal. They can become pathological (hemorrhoidal disease, HD) being the most common cause of painless rectal bleeding during defecation with or without prolapsing anal tissue. The treatment of HD must be tailored to both the severity of disease and patient's expectation. Methods: A narrative review of all the most relevant papers present on the three major databases (PUBMED, EMBASE and WEB OF SCIENCE) regarding conservative treatment was conducted. Results: Conservative treatment is effective in managing the majority of patients complaining of early stages of the disease. Dietary and lifestyle modifications are the first therapeutic step necessary to achieve a regular defecation with soft stool whereas oral phlebotonic drugs can help to control symptoms. The use of topical medications, particularly during the acute phase or in the post-operative period can also be beneficial for all patients complaining of HD. Conclusion: Despite a large number of available products in the market and the high incidence of HD, very few randomized controlled trials have been carried out and most of the studies are uncontrolled case series. Larger and better designed studies are necessary to establish the real benefit of all types of drugs for the treatment of early stages of H
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