Hypercomputation refers to computation surpassing the Turing model, not just exceeding the von Neumann architecture. Algebraic constructions yield a $nitely based pseudorecursive equational theory (Internat. J. Algebra Comput. 6 (1996) 457–510). It is not recursive, although for each given number n, its equations in n variables form a recursive set. Hypercomputation is therefore required for an...

This paper presents some aspects of the first Portuguese frequency lexicon extracted from a corpus of large dimensions. The Multifunctional Computational Lexicon of Contemporary Portuguese (henceforth MCL) rised from the necessity of filling a gap existent in the studies of the contemporary Portuguese. Until recently, the frequency lexicons of Portuguese were of very small dimensions, such as P...

Morphological characters remain an essential tool for phylogenetic studies, even in the current age of molecular systematics (Scotland & al., 2003; Jenner, 2004; Wiens 2004; Smith & Turner, 2005; Lee, 2006). Consequently, the reliability and validity of the methods used to identify characters and define character states is highly relevant to systematics research. Although identifying appropriat...

How similar are two corpora? A measure of corpus similarity would be very useful for NLP for many purposes, such as estimating the work involved in porting a system from one domain to another. First, we discuss difficulties in identifying what we mean by 'corpus similariti: human similarity judgements are not finegrained enough, corpus similarity is inherently multidimensional, and similarity c...

This paper describes the development of a model for identifying points of prominence in speech. This model can be used as a first step in intonational labeling of corpora that are used in some speech synthesis systems (Black and Taylor, 1995). The working definition of prominence is that starred ToBI accents (Silverman et al., 1992), that is, H*, L*, L*+H, L+H*, and H+!H*, are prominent. The pr...