1,720,957 research outputs found
Rabdomiolisi in operaio esposto ad olii minerali paraffinici. Insolita associazione con bronchiolite obliterante e polmonite organizzativa (BOOP)
No full textWe describe a 29-year-old worker; exposed to metal dust, sawdust and paraffinic mineral oils in a factory producing accessories for leather articles and clothing, who came to observation with fever (39 degrees C), chest pain and marked increase of muscular enzymes. Chest computed tomography showed two areas of lung consolidation, that subsequently appeared enlarged with central escavation. Lung biopsy lead to the diagnosis of BOOP. The case has been reported to the judicial and workers' compensation authorities as probable occupational toxic myopathy. Indeed, exposure to paraffinic mineral oils is a known, though unusual, cause of rhabdomyolysis. The association with BOOP has never been previously described
Ocular argyrosis in a silver craftsman
Full text linkThis case report highlights the hazard of silver crafting without adequate eye protection, and indicates that occupational ocular argyrosis may still be observed in clinical practice today. In such cases, occupational anamnesis, ophthalmologic examination, confocal corneal biomicroscopy, and histopathology will allow the correct diagnosis that, in turn, is important for work-related medico-legal issues
Asbestos-induced peritoneal mesothelioma in a construction worker
No full textOccupational and environmental asbestos exposure continues to represent a public health problem, despite increasingly restrictive laws adopted by most industrialized countries. Peritoneal mesothelioma is a rare and aggressive asbestos-related malignancy. We present a 65-year-old man who developed recurrent ascites after having been exposed to asbestos in the building industry for over 40 years. Liver function and histology were normal. Abdominal computed tomography initially excluded the presence of expansive processes, and no abnormal cells were found in the ascitic fluid. Laparoscopy showed diffuse neoplastic infiltration of the peritoneum. Bioptic samples histopathology revealed epithelioid neoplastic proliferation with a tubulopapillary pattern, falsely suggesting metastatic adenocarcinomatosis. In consideration of the occupational history, and after further diagnostic procedures had failed to identify the hypothetical primitive tumor, immunostaining of the neoplastic tissue was performed. The carcinoembrionary antigen (CEA) and the epithelial glycoprotein Ber-EP4 were negative, while the mesothelial markers cytokeratins, calretinin, epithelial membrane antigen (EMA) and HBME-1 resulted positive, leading to the correct diagnosis of peritoneal epithelial mesothelioma. The Italian Workers’ Compensation Authority (INAIL) recognized the occupational origin of the disease. Cytoreductive surgery associated with continuos hyperthermic peritoneal perfusion (cisplatin at 42°C, for an hour) was performed. The disease relapsed after four months, and was later complicated by bowel obstruction requiring palliative ileostomy. The patient died 23 months after diagnosis. The case illustrates the insidious diagnostic problems posed by peritoneal mesothelioma, a tumor which often simulate other malignancies (e.g., metastatic carcinomas) at routine histopathological examination. Occupational history and immunohistochemistry are helpful for the correct diagnosis, which, in turn, is important for two reasons: (i) in relation to prognosis and treatment (adoption of new integrated procedures which seem to promise prolonged survival and increased quality of life); (ii) in relation to medico-legal issues and occupational-related compensation claims following asbestos exposure
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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