Abstract: A dynamic database interface for relational and object-oriented databases includes a dynamic, self-modifying graphical user interface defining a plurality of graphical windows for searching and editing the contents of the relational database, as well as modifying the structure of the database tables. The graphical user interface recognizes modifications to the structure of the database tables and regenerates the graphical windows to accommodate such modifications. The graphical windows also depict schematic representations of physical locations of objects stored within the tables of the relational database. In addition to using the graphical windows to edit the contents and modify the structure of the relational database, batches of data may be imported to both edit the contents of the relational database and modify the structure of the relational database tables.

Abstract: A method of disrupting a turbulent region of a boundary layer within a fluid flow passing over a surface to decrease momentum transfer, and thus friction drag, between the turbulent flow and the surface. Bending waves are generated on the surface to impose velocity and/or pressure oscillations within the turbulent region and disrupt the normal turbulent process within the boundary layer, thereby decreasing the transfer of momentum from the turbulent flow to the surface. The bending waves are preferably generated in a predominantly spanwise or normal direction relative to the streamwise fluid flow. In another embodiment, the bending waves enhance the turbulent process and increase the transfer of momentum between the turbulent flow and the surface. Bending wave actuators may bend the surface to generate bending waves within the surface itself. In another embodiment, actuators may generate bending waves within a separate material attached to the surface.

Abstract: An optical system includes graded refractive index ("GRIN") optical elements. An objective optical element and an ocular optical element, each including at least one GRIN element, are located in an optical path which is substantially voidless. The optical system is not susceptible to fogging due to the absence of voids in the optical path. An image intensifier may be positioned in the optical path between the objective and ocular optical elements. The image intensifier responds primarily to invisible light and creates an amplified level of light substantially at a predetermined visible wavelength. A beam splitter may be used to split the light from the objective optical element into ranges of visible and invisible wavelengths. The range of visible light is directed through a first light channel to a beam combiner. The range of invisible light is directed through a second light channel to the image intensifier.