Michael Gerber

Learn More
We present a new approach to quasi text-independent speaker verification based on pattern matching. Our method first seeks phonetically matched segments in two speech signals. For all aligned frame pairs of these segments we compute the probability that they were uttered by the same speaker. Based on these frame-level probabilities we take the decision(More)
The purpose of this study was to assess the roles of oral language and phonological awareness on reading performance in grade 3 bilingual students. Several hierarchical models assessed the best predictors of third grade English and Spanish word attack, word identification and reading comprehension. Predictor variables were measures of phonological(More)
This paper deals with the problem of finding the optimal sequence of sub-word unit HMMs for a number of given utterances of a word. For this problem we present a new solution based on an extension of the Viterbi algorithm which maximizes the joint probability of the utterances and all possible sequences of sub-word units and hence guarantees to find the(More)
We pursue an approach to text-independent speaker verification which takes the decision whether two speech-signals are from the same speaker or not by matching segments that are common to both signals. A previous system using this pattern matching approach has shown good results but the used algorithm to seek for common segments was not satisfactory in(More)
Identifying factors influencing a species' ecological niche and demography is a prerequisite for species conservation. However, our understanding of the interplay between demographic rates and biotic/abiotic factors is still poor for most species of conservation concern. We evaluated relevance of eight hypotheses relating to timing of breeding, temporal(More)
Understanding the factors underlying habitat selection is important in ecological and evolutionary contexts, and crucial for developing targeted conservation action in threatened species. However, the key factors associated to habitat selection often remain poorly known. We evaluated hypotheses related to abiotic and biotic factors thought to affect(More)