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- Gladys Castillo, Eva Millán, Luís Descalço, Paula Oliveira, Sandra Diogo
- Computers & Education
- 2013

In this paper, we describe the integration and evaluation of an existing generic Bayesian student model (GBSM) into an existing computerized testing systemwithin the Mathematics Education Project (PmatE Projecto Matemática Ensino) of the University of Aveiro. This generic Bayesian student model had been previously evaluated with simulated students, but a… (More)

- Luís Descalço, Nikola Ruskuc
- IJAC
- 2005

In this paper we give a description of all subsemigroups of the bicyclic monoid B. We show that there are essentially five different types of subsemigroups. One of them is the degenerate case, and the remaining four split in two groups of two, linked by the obvious anti-isomorphism of B. Each subsemigroup is characterized by a certain collection of… (More)

- Luís Descalço
- 2002

vi Acknowledgements vii

- Luís Descalço
- 2007

We study generalized Green’s equivalences on all subsemigroups of the bicyclic monoid B and determine the abundant (and adequate) subsemigroups of B.

- Luís Descalço, Paula Carvalho
- 2015 10th Iberian Conference on Information…
- 2015

We have implemented a Web application reusing questions from two computer systems, true/false questions from PmatE (Projeto Matemática Ensino) and multiple choice questions from Megua (Mathematics Exercise Generator, University of Aveiro). Our application implements a Bayesian user model for diagnosing student knowledge in the topics covered. In… (More)

- Gladys Castillo, Luís Descalço, Sandra Diogo, Eva Millán, Paula Oliveira, Batel Anjo
- EC-TEL
- 2010

- Luís Descalço, Paula Carvalho, J. P. Cruz, Paula Oliveira, Dina Seabra
- ArXiv
- 2015

Learning mathematics requires students to work in an independent way which is particularly challenging for such an abstract subject. Advancements in technology and, taking the student as the focus of his own learning, led to a change of paradigm in the design and development of educational contents. In this paper we describe the first experience with an… (More)

The class of weakly algebrizable logics is defined as the class of logics having monotonic and injective Leibniz operator. We show that “monotonicity” cannot be discarded on this definition, by presenting an example of a system with injective and non monotonic Leibniz operator. We also show that the non injectivity of the non protoalgebraic inf-sup fragment… (More)

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