With this in mind, a handful of colleges— Princeton and the University of North Carolina , among them—offer scholarships and fellowships to incoming freshmen who take a gap year. Harvard has long encouraged the practice . And in February, Tufts University launched its 1+4 bridge program, which, starting in fall 2015, will offer gap-year opportunities for national and international service regardless of a student’s ability to pay. Meanwhile, organizations that promote a gap year, including the American Gap Association and USA Gap Fairs , are expanding rapidly.
In electrodynamic suspension (EDS), both the guideway and the train exert a magnetic field, and the train is levitated by the repulsive and attractive force between these magnetic fields.  In some configurations, the train can be levitated only by repulsive force. In the early stages of maglev development at the Miyazaki test track, a purely repulsive system was used instead of the later repulsive and attractive EDS system.  The magnetic field is produced either by superconducting magnets (as in JR–Maglev) or by an array of permanent magnets (as in Inductrack ). The repulsive and attractive force in the track is created by an induced magnetic field in wires or other conducting strips in the track. A major advantage of EDS maglev systems is that they are dynamically stable – changes in distance between the track and the magnets creates strong forces to return the system to its original position.  In addition, the attractive force varies in the opposite manner, providing the same adjustment effects. No active feedback control is needed.