Antonio Villegas

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The amount of knowledge represented in the Health Level 7 International (HL7) information models is very large. The sheer size of those models makes them very useful for the communities for which they are developed. However, the size of the models and their overall organization makes it difficult to manually extract knowledge from them. We propose to(More)
A cDNA and two genomic clones comprising highly similar genes that encode a protein with a Myb-related DNA-binding domain were isolated from the resurrection plant Craterostigma plantagineum. The structure of cpm5 and cpm10 (Craterostigma plantagineum myb) genes consists of three putative exons encoding a protein of 36.6 kDa. The cDNA of cpm7 encodes a(More)
The visualization and the understanding of large conceptual schemas require the use of specific methods.These methods generate clustered, summarized or focused schemas that are easier to visualize and to understand.All of these methods require computing the importance of each entity type in the schema. In principle, the totality of knowledge defined in the(More)
The Health Level 7 (HL7) v3 standard provides information models for the exchange, integration, sharing, and retrieval of electronic health information. Those models are defined in a graphical modeling language other than the UML standard. It involves the development of new tools and the need for specific training in order to support and understand the(More)
Human understanding of constraint expressions (also called schema rules) in large conceptual schemas is very difficult. This is due to the fact that the elements (entity types, attributes, relationship types) involved in an expression are defined in different places in the schema, which may be very distant from each other and embedded in an intricate web of(More)
BACKGROUND The prevalence of type 2 diabetes is increasing at an alarming rate in Latin America and in the Caribbean. We present evidence that a cost-effective and sustainable approach to lifestyle modification in underdeveloped countries can be implemented using community members as healthcare champions. METHODS Of 222 community members screened in the(More)
A complete conceptual schema must include all relevant general static and dynamic aspects of an information system. Event types describe a nonempty set of allowed changes in the population of entity or relationship types in the domain of the conceptual schema. The conceptual schemas of many real-world information systems that include the specification of(More)