A dust collecting unit of a vacuum cleaner has a dust collecting body including a first dust separating unit for separating dust from air and a first dust storing unit for storing the separated dust. The present invention software and process is capable of displaying extremely high resolution terrain models and imagery in real time over the entire surface of the planet, as well as a large number of moving entities and their associated graphical models. The neurotrophin is delivered to, or within close proximity of, identified defective, diseased or damaged brain cells. In such methods, a suitable agent is A peptide or an antibody thereto.