Ana Laura Lezama Sánchez

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In this research work we propose two approaches for query expansion aiming to improve the performance of a Boolean Information Retrieval System (BIRS). Queries are made up of words and integrate the concepts and semantic relationships retrieved from four ontologies of restricted domain. The final purpose is to retrieve relevant information from the domain(More)
The synthesis and characterization of the precursor isomers trans-4-(2-(pyridin-2-yl)vinylbenzaldehyde (I), trans-4-(2-(pyridin-4-yl)vinylbenzaldehyde (II), trans-4-(2-(pyridin-2-yl)vinylbenzoic acid (III) and (E)-4-(2-(pydridin-4-yl)vinylbenzoic acid (IV) are reported. These compounds were prepared in order to obtain(More)
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