Abstract: The invention provides a watercraft for transporting one or more human users in any of a sitting, standing, riding, kneeling or recumbent positions. The watercraft includes (a) a first hull comprising a cavity extending from the top of the hull downwards substantially to the bottom of said hull, said cavity being sufficiently wide to accommodate a user's leg and foot when the user is in a sitting, standing, riding, or kneeling position, (b) a second hull comprising a cavity extending from the top of the hull downwards substantially to the bottom of said hull, said cavity being sufficiently wide to accommodate a user's leg and foot when the user is in a sitting, standing, riding, or kneeling position, and (c) a connector rigidly attached to each of the first and second hulls, wherein a user of the watercraft can sit, ride, kneel, or stand with one foot and/or leg in the cavity of each hull.

Abstract: An apparatus for the purpose of floatation and transportation on water comprises a pair of buoyant wing-shaped floats and foot wells in the floats designed to be under the center of buoyancy of each float. The apparatus may further comprise a tether attached to each float at the user's ankle height. Accessories may be attached to one or more floats. The invention further provides a number of propulsion mechanisms, one of which comprises a support structure, a buoyant flap articulated to the support member by an articulation having an axis of rotation that is both within 45 degrees of horizontal and substantially perpendicular to the direction of travel, said flap being movable substantially in rotation about said axis, said rotation being in a semicylindrical space behind said axis, said space being away from said direction of travel. Additional novel features of the apparatus and propulsion mechanism are discussed herein.

Abstract: A digital tomography system includes an electron source that provides a beam of electrons, and an electromagnet assembly that receives said beam of electrons and is configured and arranged to direct the beam of electrons along a selected path, wherein the assembly provides a redirected beam of electrons. The system also includes a target that is struck by the redirected beam of electrons and generates a cone of x-rays, and a slit collimator that receives the cone of x-rays and generates a fan beam. A first line of detectors is positioned to detect x-rays that pass through the object under inspection, and provide sensed signals indicative thereof to a controller that receives the sensed signals and forms a displayable image of a selected plane through the object under inspection.