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Identification of rounded atelectasis in workers exposed to asbestos by contrast helical computed tomography BJMBR
Terra-Filho,M.; Kavakama,J.; Bagatin,E.; Capelozzi,V.L.; Nery,L.E.; Tavares,R..
Rounded atelectasis (RA) is a benign and unusual form of subpleural lung collapse that has been described mostly in asbestos-exposed workers. This form of atelectasis manifests as a lung nodule and can be confused with bronchogenic carcinoma upon conventional radiologic examination. The objective of the present study was to evaluate the variation in contrast uptake in computed tomography for the identification of asbestos-related RA in Brazil. Between January 1998 and December 2000, high-resolution computed tomography (HRCT) was performed in 1658 asbestos-exposed workers. The diagnosis was made in nine patients based on a history of prior asbestos exposure, the presence of characteristic (HRCT) findings and lesions unchanged in size over 2 years or more....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Rounded atelectasis; Asbestos; Helical computed tomography; Asbestos-exposed workers.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003001000010
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The clustergram: A graph for visualizing hierarchical and nonhierarchical cluster analyses AgEcon
Schonlau, Matthias.
In hierarchical cluster analysis, dendrograms are used to visualize how clusters are formed. I propose an alternative graph called a “clustergram” to examine how cluster members are assigned to clusters as the number of clusters increases. This graph is useful in exploratory analysis for nonhierarchical clustering algorithms such as k-means and for hierarchical cluster algorithms when the number of observations is large enough to make dendrograms impractical. I present the Stata code and give two examples.
Tipo: Journal Article Palavras-chave: Dendrogram; Tree; Clustering; Nonhierarchical; Large data; Asbestos; Research Methods/ Statistical Methods.
Ano: 2002 URL: http://purl.umn.edu/116024
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Like Products, Health and Environmental Exceptions: The Interpretation of PPMs in Recent WTO Trade Dispute Cases AgEcon
Read, Robert.
This article is concerned with the ongoing debate on process and production methods (PPMs) and the extent to which existing GATT 1994 articles and WTO agreements are able to deal with these issues. The article provides an overview of GATT articles III.4 on like products and XX on general exceptions as well as the SPS and TBT agreements. It then summarises four recent GATT/WTO trade dispute cases involving PPM issues: tuna-dolphin; shrimp-turtle; gasoline standards; and asbestos. The WTO panel and appellate body decisions in these cases are analysed with regard to articles III.4 and XX in the context of the evolution of WTO case law with respect to PPMs. Inferences are also drawn concerning the likely implications for a potential trade dispute over GM...
Tipo: Journal Article Palavras-chave: Asbestos; Environment; Exceptions; Gasoline; GM; Health; Like products; PPMs; Shrimp-turtle; Trade disputes; Tuna-dolphin; WTO; International Relations/Trade.
Ano: 2004 URL: http://purl.umn.edu/23900
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