Disclosed are methods for activating an NKT cell, methods of stimulating an immune response in a subject, methods of improving vaccine efficacy, and methods of treating an infection. The captured data may be acquired through a data acquisition system with devices or sensors in an integrated or distributed configuration. The imaging element includes a light receiving face arranged to receive light passing through the lens unit, and converts an optical image of the subject into an electrical signal. The initial value of the torque profile of the first friction clutch is chosen so as to be greater than a minimum value calculated by determining the condition of synchronism of the driving shaft and of the first primary shaft. Identifying cluster keys for a document can take the form of performing feature reduction, and identifying any features remaining thereafter as cluster keys. The scheduler then forms, for each MCS of the first set, a second set of MCSs that produces the maximum data rate for a second user in accordance with a first residual resource that remains when applying that MCS to the first user, thereby producing a group of second sets of MCSs.