Abstract: A wing that includes a lower portion that is located between two curved portions; wherein the lower portion is substantially flat and the two curved portions extend above the lower portion; wherein the wing defines a space that is wider than twice a diameter of a propeller that introduces a quasi-laminar stream if positioned in proximity to the wing and is circulated at a desired speed. The curved portions can be arcuated ends of the wing.

Abstract: A propulsion system is presented, the system comprising primary and secondary electromagnetic field generators being attached to a frame at a predetermined distance between them, and a control unit connected thereto and configured to create pulsating electromagnetic fields generated by at least one of the electromagnetic field generators. The pulsating electromagnetic field is configured to pulsate at time intervals determined in accordance with retardation time caused by said predetermined distance between the primary and secondary electromagnetic field generators. Interaction between the electromagnetic field generators and electromagnetic fields generated thereby provides a total net force acting on the system.

Abstract: An electromagnetic pulse generating apparatus including an elongated flexible tube having an inflated mode and a non-inflated mode, wherein a cross section of said tube perpendicular to the elongation axis is larger when inflated mode than when not-inflated. The tube is placed inside an electrically conductive coil wound along the elongated axis and electrically connected to an output connector, and an opening connected to a source of a hydraulic and/or pneumatic pressure. A magnetic field generating apparatus provides a magnetic flux parallel to coil axis. Where the tube is operative to receive the pressure into the opening, causing the tube to inflate, thus causing change of cross-section area of the coil within the magnetic flux, thus generating an electromagnetic pulse at the output connector.

Abstract: A wing that includes a lower portion that is located between two curved portions; wherein the lower portion is substantially flat and the two curved portions extend above the lower portion; wherein the wing defines a space that is wider than twice a diameter of a propeller that introduces a quasi-laminar stream if positioned in proximity to the wing and is circulated at a desired speed. The curved portions can be arcuated ends of the wing.

Abstract: A method for the generation of an image on a selectable part of the retina of a viewer's eye, to form an ocular image on the retina. The method includes the step of receiving an image being composed of a number of image elements that correspond to the number of cone photoreceptors of a viewer's fovea, so as to constitute a received image. The method further includes the step of displaying the received image so as to constitute a displayed image. The method further includes the step of projecting the displayed image onto a viewer's fovea area, so as to constitute a foveal image, such that a number of image elements of the foveal image corresponds to the number of cone photoreceptors of the viewer's fovea. The method further includes the step of projecting said displayed image onto a viewer's retina so as to constitute a retinal image.

Abstract: Subterranean generation of heat as a source of energy optionally accompanied by the production of minerals. In subterranean formations of minerals that are capable of undergoing an enthalpic degradation, such degradation is artificially accelerated by several orders of magnitude. To this end a bore hole is drilled down to the desired formation and accelerated enthalpic degradation is made to occur by a suitable ignition. For the extraction of energy the bore hole is flushed with water and the resulting steam is withdrawn. In one embodiment, one and the same bore hole is used for charging water and withdrawing steam. In another embodiment the bore holes are arranged pairwise, one bore hole of each pair serving for ignition and introduction of water and the other serves for the withdrawal of steam.