Beatriz Barros

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Computer mediated collaborative learning allows the recording of a large amount of data about the interaction processes and the task performance of a group of students. This empirical data is a very rich source to mine for a variety of purposes. Some purposes are of practical nature like, for instance, the improvement of peer awareness on the on-going work.(More)
The Bowman–Birk (BBI) protease inhibitors can be used as source of sulfur amino acids, can regulate endogenous protease activity during seed germination and during the defense response of plants to pathogens. In soybean this family has not been fully described. The goal of this work was to characterize in silico and analyze the expression of the members of(More)
In this study, flow cytometric analysis was used to evaluate the genetic stability of Passiflora cincinnata Mast. plants regenerated via primary and secondary somatic embryogenesis. Embryogenic calli obtained from culturing zygotic embryos on Murashige and Skoog (MS) medium containing 18.1 μM 2,4-dichlorophenoxyacetic acid (2,4-D) and 4.4 μM benzyladenine(More)
The objective of the research presented in this article is to find representational mechanisms for relating and integrating the collaborative learning elements present in real practical environments, create an integrated ontology that considers and relates these elements, and make use of it to define new collaborative learning scenarios. It is therefore(More)
In this paper the ‘Active Document system’, grounded in the Activity Theory, is presented. This system serves both as a representational framework for the description of learning activities and a harness for the mechanisms necessary to support the creation and management of the corresponding computer-based scenarios. This system is made up of three(More)
A learning object repository (or LOR) is presented as a mechanism which facilitates the organisation and reuse of collaborative learning scenarios, using metadata and ontologies. The main design concern here is making it easy for authors and learners to work with the LOR while creating or using learning environments. Three views of the repository are(More)
In this paper the underlying knowledge model and architecture of IPETER (Intelligent Personalised English Tutoring EnviRonment) are presented. This system has been designed for the on-line distance learning of English where too many students restrict the teacher’s possibilities to provide individualised guidance. I-PETER is made up of four domain models(More)
Peer review is the "gold standard" for evaluating journal and conference papers, research proposals, on-going projects and university departments. However, it is widely believed that current systems are expensive, conservative and prone to various forms of bias. One form of bias identified in the literature is "social bias" linked to the personal attributes(More)