In blind source separation (BSS) for multisubject functional magnetic resonance imaging (fMRI) data. dimensionality reduction is generally performed for multiple times. This leads to the challenge of determining the number of the retained dimensionality. i. https://www.spidertattooz.com/OMEGA-Speedmaster-Professional-Moonwatch-Co-Axial-Master-Chronometer-Chronograph-310-32-42-50-01-001-p19098/