In this study, results of computational simulations on English child-directed speech are presented to uncover what distributional properties of words make it easier to group them into lexical categories. This analysis provides evidence that words are easier to categorize when (i) they are hard to predict given the contexts they occur in; (ii) they occur in few different contexts; and (iii) thei...

Part-of-Speech (PoS) Tagging – the automatic annotation of lexical categories – is a widely used early stage of linguistic text analysis. One approach, rule-based morphological anaylsis, employs linguistic knowledge in the form of hand-coded rules to derive a set of possible analyses for each input token, but is known to produce highly ambiguous results. Stochastic tagging techniques such as Hi...

This communication presents a modular arrangement of lexical and citation operations to achieve a satisfactory delineation of a scientific field. Three querying methods are considered: on journals, on articles vocabulary, and on citation network. Rather than associating these querying modes, we consider possible sequences that make the best use of each method. At any stage of iteration, the ret...

Searching source code is one of the most common activities of software engineers. Text editors and other support tools normally provide searching based on lexical expressions (regular expressions). Some more advanced editors provide a way to add semantic direction to some of the searches. Recent research has focused on advancing the semantic options available to text-based queries. Most of thes...

There are many cases in which the natural translation of one language into another results in a very diierent form than that of the original. The existence of translation divergences (i.e., cross-linguistic distinctions) makes the straightforward transfer from source structures into target structures impractical. Many existing translation systems have mechanisms for handling divergent structure...

Human knowledge consists of static and dynamic knowledge chunks. The static ones include the so called lexical knowledge or the ability to sense similarities between facts and between predicates. Through dynamic attainments one can make deductions or one can give answers to a question. There are several and very different approaches to make a model of human knowledge, but one of the most common...

this paper investigates the use of ‘lexical bundles’ in two broad corpora of journalistic writing. the aim of this study is to compare the use of lexical bundles in the two domains, one consisted of newspaper articles written in english and published in england and the other one comprised of newspaper articles written in persian from iranian publications. for this purpose, the frequency of occu...

A prominence model is proposed for enhancing prosodic features in automatic lexical stress and pitch accent detection. We make use of a loudness model and incorporate differential pitch values to improve conventional features. Experiments show that these new prosodic features can improve the detection of lexical stress and pitch accent by about 6%. We further employ a prominence model to take i...

In this paper we present a whole Natural Language Processing (NLP) system for Spanish. The core of this system is the parser, which uses the grammatical formalism Lexical-Functional Grammars (LFG). Another important component of this system is the anaphora resolution module. To solve the anaphora, this module contains a method based on linguistic information (lexical, morphological, syntactic a...

Infants must develop both flexibility and constraint in their interpretation of acceptable word forms. The current experiments examined the development of infants' lexical interpretation of non-native variations in pitch contour. Fourteen-, 17-, and 19-month-olds (Experiments 1 and 2, N = 72) heard labels for two novel objects; labels contained the same syllable produced with distinct pitch con...