Browsing by Author "Omidvarnia A."
Now showing items 1-6 of 6
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Analysis of the time-varying cortical neural connectivity in the newborn EEG: A time-frequency approach
Omidvarnia, A; Mesbah, M; O'Toole, J.M.; Colditz, P; Boashash, B ( IEEE , 2011 , Conference Paper)Relationships between cortical neural recordings as a representation of functional connectivity between cortical brain regions were quantified using different time-frequency criteria. Among these, Partial Directed Coherence ... -
Generalised phase synchrony within multivariate signals: An emerging concept in time-frequency analysis
Omidvarnia A.; Boashash B.; Azemi G.; Colditz P.; Vanhatalo S. (2012 , Conference Paper)This paper introduces the notion of the instantaneous frequency (IF) based generalized phase synchrony in time-frequency analysis based on the concept of cointegration. This phase synchrony is then quantified by investigating ... -
Generalized Mean Phase Coherence for asynchrony abnormality detection in multichannel newborn EEG
Omidvarnia A.; Vanhatalo S.; Mesbah M.; Azemi G.; Colditz P.; Boashash B.... more authors ... less authors (2012 , Conference Paper)Inter-hemispheric asynchrony within the multichannel recordings of newborn EEG is associated with abnormal functionality of the newborn brain. Mean Phase Coherence (MPC) as a bivariate phase synchrony measure is widely ... -
Robust estimation of highly-varying nonlinear instantaneous frequency of monocomponent signals using a lower-order complex-time distribution
Omidvarnia, A.; Azemi, G.; O'Toole, J.M.; Boashash, B. ( Elsevier B.V. , 2013 , Article)This paper proposes an approach for robust estimation of highly-varying nonlinear instantaneous frequency (IF) in monocomponent nonstationary signals. The proposed method is based on a lower order complex-time distribution ... -
Time-frequency methodologies in neurosciences
Boashash, B.; Stevenson, N.J.; Rankine, L.J.; Stevenson, N.J.; Azemi, G.; Sejdić, E.; Aviyente, S.; Akan, A.; Mert, A.; Dong, S.; Omidvarnia, A.; Zarjam, P.; O'Toole, J.M.; Colditz, P.... more authors ... less authors ( Elsevier Inc. , 2016 , Book chapter)This chapter presents a number of time-frequency (t,f) techniques that can provide advanced solutions to several problems in neuro-sciences with focus on the monitoring of brain abnormalities using EEG and other physiological ... -
A time–frequency based approach for generalized phase synchrony assessment in nonstationary multivariate signals
Omidvarnia, A; Azemi, G; Colditz, P.B; Boashash, B ( Elsevier , 2013 , Article)This paper proposes a new approach to estimate the phase synchrony among nonstationary multivariate signals using the linear relationships between their instantaneous frequency (IF) laws. For cases where nonstationary ...