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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 ongoing work.(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)
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)
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)
Communication through artefacts, in the sense of objects (co-)constructed by learners, is a well known mechanism in synchronous shared workspace environments. In this article, we explore the potential of extending this principle to heterogeneous, anonymous and asynchronous learner communities by drawing on existing work, e.g. in the areas of " social(More)
A linguistic, pedagogic and technological framework for an ICALL system called COPPER is presented here, where individual and collaborative learning are combined within a constructivist approach to facilitate second language learning. Based upon the Common European Framework of Reference for Languages, the ability to use language is viewed as one of several(More)
Formative evaluation and iterative prototyping seem an interesting approach for building collaborative learning systems. Our approach to create our software system consisted on iterating successive stages of analysis, specification, implementation and evaluation. At the end, the process turned out to be a five-pass cycle, carried out in two years, with a(More)