Gareth Dwyer

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The dynamic pattern of fetal breathing was studied in 17 fetal lambs with chronically implanted electromyographic electrodes in the diaphragm. The instantaneous breathing rate time series appeared similar on different time scales, with clusters of faster breathing rates interspersed with periods of relative quiescience, suggesting self-similarity.(More)
Morphine has been reported to both stimulate and suppress fetal breathing movements (FBM). In light of these conflicting reports, we have conducted a systematic dose-response analysis of the effects of morphine on FBM in 27 fetal lambs. Morphine was infused directly to the fetus in doses ranging from 0.075 to 80 mg/hr. Low doses (0.075-2.5 mg/hr) resulted(More)
The mechanism of action of low doses of morphine on breathing dynamics in the fetus was studied in 16 fetal lambs with chronically implanted electromyographic electrodes in the diaphragm. Morphine (0.15-2.5 mg/h) caused a significant dose-dependent increase in the number of diaphragmatic bursts per hour, with either an increase or no change in instantaneous(More)
With the use of a relatively inexpensive microcomputer-based system for power spectral analysis, we have been able to provide quantitative information on maturational changes in electrocorticogram waveforms in the third-trimester fetal lamb. Twenty-six electrocorticogram recordings were obtained from nine fetal lambs, with gestational ages ranging from 114(More)
Developmental changes in the continuity and stability of fetal breathing patterns were studied in 27 fetal lambs with chronically implanted electromyographic electrodes in the diaphragm throughout the third trimester (102-140 days). The results showed that there was a progressive decrease in the incidence of fetal breathing movements throughout the third(More)
A relatively powerful and inexpensive microcomputer-based system for the spectral analysis of the EEG is presented. High resolution and speed is achieved with the use of recently available large-scale integrated circuit technology with enhanced functionality (INTEL Math co-processors 8087) which can perform transcendental functions rapidly. The versatility(More)
We describe our participation in the PAN 2017 shared task on Author Profiling, identifying authors’ gender and language variety for English, Spanish, Arabic and Portuguese. We describe both the final, submitted system, and a series of negative results. Our aim was to create a single model for both gender and language, and for all language varieties. Our(More)
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