João José Neto

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The present paper introduces the concept of adaptive automata as an alternative formal tool for describing context-dependent languages. This formal framework has the advantage of allowing easy mapping of a language description into an efficient parser for that language. Such a good performance is due to the potential hierarchical structure adaptive automata(More)
This article presents adaptive automata as an alternative theoretical model to formally describe recognizing devices with learning capabilities. A simplified formal definition of the notation and its semantics is given, and some analysis is made on their time and space behavioral properties, showing positive aspects that make them suitable for knowledge(More)
This paper presents an overview of current work on the recognition of sign language and a prototype of a simple editor for a small subset of the Brazilian Sign Language, LIBRAS. Handshape based alphabetical signs, are captured by a single digital camera, processed on-line by using computational vision techniques and converted to the corresponding Latin(More)
— Currently there are three basic types of pattern recognition, the syntactic, the statistical and the neu-ral types. They all have advantages and disadvantages, some of which are troublesome. In statistical methods it is difficult to express structured information. Neural methods have problems to represent neural networks semantically. In syntactic methods(More)
The aim of the present paper is to revisit some important topics regarding pedagogical issues on the teaching of concepts and t echniques of programming languages and compiler construction. Essentially, a unified formal model is used in the proposed approach to explore the exposition of the students to a set of lessons with growing complexity, with a heavy(More)
When modelling reactive systems, one has to adequately choose tools and notations that are consistent and appropriate to comfortably express all relevant features of a system. There are many ways and notations to describe the structure and behavior of systems. Graphical notations are uaually attracting for being intuitive and readable. Statecharts and Petri(More)