Independent components analysis independent component analysis 4 Independent component analysis 3 Air traffic control 2 Analysis method 2 Artefact reduction 2 Brain 2 Dimensionality reduction 2 Electroencephalography 2 Extraction 2 Eye movements 2 Feature extraction 2 Features extraction 2 Noise 2 Spectral density 2 Threshold 2 Vigilance assessment 2 Vigilance levels 2 Wavelet transforms 2 Wavelets transform 2 article 2 dimensionality reduction 2 feature extraction 2 noise 2 thresholds 2 vigilance assessment 2 wavelet transform 2 Algorithms 1 Cultural evolution 1 Databases, Factual 1