36,079 research outputs found
An Analysis of Rhythmic Staccato-Vocalization Based on Frequency Demodulation for Laughter Detection in Conversational Meetings
Human laugh is able to convey various kinds of meanings in human
communications. There exists various kinds of human laugh signal, for example:
vocalized laugh and non vocalized laugh. Following the theories of psychology,
among all the vocalized laugh type, rhythmic staccato-vocalization
significantly evokes the positive responses in the interactions. In this paper
we attempt to exploit this observation to detect human laugh occurrences, i.e.,
the laughter, in multiparty conversations from the AMI meeting corpus. First,
we separate the high energy frames from speech, leaving out the low energy
frames through power spectral density estimation. We borrow the algorithm of
rhythm detection from the area of music analysis to use that on the high energy
frames. Finally, we detect rhythmic laugh frames, analyzing the candidate
rhythmic frames using statistics. This novel approach for detection of
`positive' rhythmic human laughter performs better than the standard laughter
classification baseline.Comment: 5 pages, 1 figure, conference pape
Role Of Electron-Electron Scattering On Spin Transport In Single Layer Graphene
In this work, the effect of electron-electron scattering on spin transport in single layer graphene is studied using semi-classical Monte Carlo simulation. The D'yakonov-P'erel mechanism is considered for spin relaxation. It is found that electron-electron scattering causes spin relaxation length to decrease by 35% at 300 K. The reason for this decrease in spin relaxation length is that the ensemble spin is modified upon an e-e collision and also e-e scattering rate is greater than phonon scattering rate at room temperature, which causes change in spin relaxation profile due to electron-electron scattering. (C) 2014 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.Microelectronics Research Cente
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