Abstract: A rolling weighted base for supporting an object and for facilitating the movement of the object along a surface, the base connected to the object by a vertical shaft, the base comprising: at least three weight balls; a housing configured to receive the vertical shaft and to hold the at least three balls rigidly spaced apart so that the at least three balls do not touch each other, the at least three balls partially protruding from said housing toward the hard surface and free to rotate inside the housing.

Abstract: An orbiting engine includes a plurality of combustion chambers (52) rigidly connected to and disposed equidistantly from a central shaft (54). The combustion chambers (52) are oriented so that exhaust gases emerge therefrom tangentially to a circle concentric with the shaft (54), thereby causing the shaft to rotate. In preferred embodiments, a centrifugal compressor (62), radially inward from the combustion chambers (52) and driven by the shaft (54), compresses air that serves to oxidize fuel injected into the combustion chambers (52).

Abstract: A method of coordinating communications among several moving participants that have several communications channels available to them. Each participant is provided with a mechanism for continuously determining its own location and with a table of the locations of the other participants. Each participant selects the channel to use to communicate to each other participant, based on its own determined location and the tabulated locations of the other participants. Periodically, the participants broadcast their own locations to each other.

Abstract: A method for learning a foreign language by first memorizing conjugations of representative verbs using the human hearing, viewing and feeling senses, and a device for implementing the method, the device providing the feeling memorizing means, the method comprising the step of memorizing the conjugations of the language using the human hearing, viewing and feeling senses, wherein using the feeling sense is effected by having the conjugations symbolized by elements of the device, each having a specifying location and a specifying surface or construction conferring a learner with an associated specifying feeling, such that when the learner sees a scene displayed on a display and hears a sentence associated with that scene, which sentence includes an associated specific conjugation, the learner touches a specific corresponding element symbolizing the associated specific conjugation.