Elizabeth Romero

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We report that Id knockout mouse embryos display multiple cardiac defects, but mid-gestation lethality is rescued by the injection of 15 wild-type embryonic stem (ES) cells into mutant blastocysts. Myocardial markers altered in Id mutant cells are restored to normal throughout the chimeric myocardium. Intraperitoneal injection of ES cells into female mice(More)
This paper introduces a multi-model ontology-based framework for semantic search of educational content in E-learning repository of courses, lectures, multimedia resources, etc. This hybrid recommender system is driven by two types of recommendations: content-based (domain ontology model) and rule-based (learner’s interest-based and cluster-based).(More)
BACKGROUND Between April 2001 and March 2004, the Directly Observed Therapy-Short course (DOTS) program was successfully implemented by the National Tuberculosis control program, with assistance from the Canadian Lung Association, in three provinces of Ecuador, where 52% of the population of the country reside. METHODS Markov modelling was used to project(More)
STUDY OBJECTIVE The present study evaluated the relationship between health status (HS) and peripheral muscle histochemical characteristics in chronic obstructive pulmonary disease (COPD), and identified selected independent respiratory and extrapulmonary variables that predicted the HS of these patients. DESIGN Cross-sectional study. SETTING Outpatient(More)
One of the first Multi-Language Information Retrieval (MLIR) systems was implemented in 1969 by Gerard Salton who enhanced his SMART system to retrieve multilingual documents in two languages, English and German. However, the research field of MLIR is still struggling since the majority of information retrieval systems are monolingual and more precisely(More)
In this paper, we describe an integrated and working Elearning search system for retrieving personalized semantically enriched learning resources. Within this context, this work proposes an architecture divided into four layers: (1) Semantic Representation (knowledge representation), (2) Algorithms, which are the core engine of this study, (3)(More)
HyperManyMedia is a search and browse information retrieval system that provides access to online learning materials. This system offers metadata/ontology-based searching mechanism that allows learners to enter a simple search term and then recommends them with metadata/semantically related terms (concepts/subconcepts). HyperManyMedia integrates several(More)