Ricardo R. Amorim

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Some consequences of promoting the object of noncommutativity theta(ij) to an operator in Hilbert space are explored. Its canonical conjugate momentum is also introduced. Consequently, a consistent algebra involving the enlarged set of canonical operators is obtained, which permits us to construct theories that are dynamically invariant under the action of(More)
In this paper, we present an ontology to represent the semantics of the IMS Learning Design (IMS LD) specification, a metadata standard used to describe the main elements of the learning design process. The motivation of this work relies on the expressiveness limitations found on the current XML-Schema implementation of the IMS LD conceptual model. To solve(More)
In this paper, we present EUME Onto, an educational ontology that describe terms of learning design, contents and resources. This ontology is intended to (1) organize the available information; and (2) provide the grounds of the knowledge based for an Intelligent Learning Management System. EUME Onto is based on metadata standards such as IMS-EML, LOM 1484,(More)
In this paper the problem of educational resource management in a cooperative learning environment is discussed. A task model was elaborated to determine both functional and level-of-service requirements. Among the former we salient: (1) the remote control of classroom hardware devices, and (2) the accessibility to course materials. Among the later we(More)
In this paper we present a learning design ontology that is based on the IMS Learning Design (IMS LD) specification. The IMS LD is a metadata standard that describes the elements of the design of any teaching-learning process on the basis of a well-founded conceptual model. However, this specification has been modelled and represented using the XML-Schema(More)
We present a multi-agent system (MAS) communication protocol for an intelligent learning management system that provides, among others, collaborative services. The motivation behind this study stems from the need to enhance the possibilities of the current software architecture of the EUME project. Our aim is to improve intelligent resource management and(More)
A consistent classical mechanics formulation is presented in such a way that, under quantization, it gives a noncommutative quantum theory with interesting new features. The Dirac formalism for constrained Hamiltonian systems is strongly used, and the object of noncommu-tativity θ ij plays a fundamental rule as an independent quantity. The presented(More)
By using a framework where the object of noncommutativity θ µν represents independent degrees of freedom, we study the symmetry properties of an extended x + θ space-time, given by the group P ', which has the Poincaré group P as a subgroup. In this process we use the minimal canonical extension of the Doplicher, Fredenhagen and Roberts algebra. It is also(More)
In this work we analyze complex scalar fields using a new framework where the object of noncommutativity θ µν represents independent degrees of freedom. In a first quantized formalism, θ µν and its canonical momentum π µν are seen as operators living in some Hilbert space. This structure is compatible with the minimal canoni-cal extension of the(More)