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This paper addresses the question whether or not the descriptive accuracy of the DARA (Dynamic Aggregation of Relational Attributes) algorithm benefits from the feature construction process. This involves solving the problem of constructing a set of relevant features used to generate patterns representing records in the TF-IDF weighted frequency matrix in order to cluster these records. In this paper,...
Clustering multiple-instances in a multi-relational environment requires data transformations (e.g. data aggregation) from datasets stored in multiple tables into a single table. Unfortunately, most relational databases are limited to a few basic methods of aggregation (e.g. max, min, sum, count, ave) to aggregate continuous and categorical values. Therefore, data transformation is limited only to...
Purpose: To describe three patients with systemic lupus erythematosus in whom ophthalmoscopic and fluorescein angiographic evidence of central serous chorioretinopathy developed.Methods: The authors retrospectively reviewed the clinical and photographic records of three patients with systemic lupus erythematous in whom central serous chorioretinopathy developed.Results: Ophthalmoscopic changes observed...
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