Matthew Gordon

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Cross-linguistic phonetic studies have yielded several insights into the possible states of the glottis. People can control the glottis so that they produce speech sounds with not only regular voicing vibrations at a range of different pitches, but also harsh, soft, creaky, breathy and a variety of other phonation types. These are controllable variations in(More)
Most natural domains can be represented in multiple ways: animals may be thought of in terms of their taxonomic groupings or their ecological niches and foods may be thought of in terms of their nutritional content or social role. We present a computational framework that discovers multiple systems of categories given information about a domain of objects(More)
It is proposed that syllable weight is driven by considerations of phonetic effectiveness and phonological simplicity. The phonetically best distinctions are claimed to be those which divide syllables into groups which are phonetically most distinct from each other. Phonologically complex distinctions are those which exceed an upper threshold in the number(More)
This paper presents results of a survey of contour tones in 105 languages with lexical tone. Results indicate an implicational hierarchy of tone bearing ability, whereby long vowels are most likely to carry contour tones, followed by syllables containing a short vowel plus a sonorant coda, followed by syllables containing a short vowel plus an obstruent(More)
Mycobacterium ulcerans is the causative agent of Buruli ulcer, a severe necrotizing skin disease that causes significant morbidity in Africa and Australia. Person-to-person transmission of Buruli ulcer is rare. Throughout Africa and Australia infection is associated with residence near slow-moving or stagnant water bodies. Although M. ulcerans DNA has been(More)