1,720,989 research outputs found
Epidemiology, diagnosis and treatment of chronic venous disease. A systematic review
No full textiNTrODuCTiON: The spectrum of Chronic venous disease (CVD) ranges from varicose veins to leg edema, and serious dermal clinical manifestations consisting of hyperpigmentation, eczema, lipodermatosclerosis, and venous skin ulceration. CVD management has undergone a revolution based on technological advances: duplex ultrasound has impacted almost every facet of phlebology, including preoperative diagnosis, periprocedural monitoring, postoperative surveillance, and even our understanding of the disease process itself. Furthermore, numerous success- ful treatment options, based on surgical, compression and medical therapy, are available for patients with CVD. This study performs a systematic and comprehensive analysis of the most recent scientific literature on the epidemiology of CVD, diagnostic procedures and conventional and innovative treatments
Concomitant aortic leiomyosarcoma and takayasu arteritis in a 55-year-old male patient
No full textTakayasu arteritis is a form of large vessel granulomatous vasculitis affecting often young or middle-Aged women, especially of Asian descent. It mainly affects the aorta and its branches. Primary malignancies, such as leiomyosarcoma of the aorta are extremely rare. This report discusses the exceptional and concomitant association of Takayasu arteritis and aortic leiomyosarcoma in a 55-year-old male. The patient suffered from systemic signs and symptoms related to arteritis together with claudication of left upper limb due to left artery subclavian stenosis. After instrumental evaluation, an infiltrating neoplasm at the level of abdominal aortic wall was detected and the patient underwent en bloc excision of the mass together with abdominal aorta and subsequent aortoaortic by pass reconstruction. Histologic findings showed an arterial leiomyosarcoma combined with elements of arterial inflammation. Patients completed therapeutic scheme with chemotherapy (doxorubicin and isosfamide) and radiotherapy for the cancer condition, as well as medical treatment (prednisone and adalimumab) for Takayasu arteritis. After 12 months, the patient showed no cancer recurrence and complete normalization of inflammatory indexes and symptoms of Takayasu arteritis
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
The endothelial dysfunction in chronic venous disease. a systematic review.
No full textNormal endothelial function maintains vascular homeosta- sis. Evidences have shown that inflammation, Matrix met- alloproteinases (MMPs) and glycocalix disfunction may be pivotal factors that lead to endothelial dysfunction, both on arterial and venous disease including chronic venous disease (CVD). PubMed and ScienceDirect databases were searched for relevant articles on these issues. This study performed a systematic analysis of the most recent scientific literature on the structure of the vascular venous endothelium and the pathophysiological processes which determine the alteration of endothelial function in CVD. An updated insight into the world of venous endothelial dysfunction might help physi- cians in better evaluating pathophysiological mechanisms of endothelial damage and in programming appropriate inter- ventions to modify it
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
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
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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