Abstract: An oscillating vane actuator for active control of fluid flow over a surface includes a pivoted vane surrounded by a wedge-shaped chamber, and first and second conduits with openings adjacent the surface. The actuator also includes a rotating shaft with a connecting rod to actuate the vane in a oscillatory manner. As the vane travels in one direction, fluid is forced out from the chamber through the first conduit and opening into the fluid stream adjacent the surface, while fluid is simultaneously drawn in through the second opening and conduit into the opposite side of the chamber. Similarly, when the vane travels in the opposite direction, fluid is forced out through the second conduit and opening into the fluid stream adjacent the surface, while fluid is simultaneously drawn in through the first opening and conduit.

Abstract: A computer-implemented building design and modeling system, method, and computer program product are provided. In one example, the computer program product includes computer executable instructions for processing by a computer system. The instructions include instructions for creating instances of parametric objects in a spatial database, where each of the parametric objects represents a construction component of a structure to be modeled and includes a user interface for enabling a user to input design data for the parametric object. The instructions also include instructions for initiating assembly of the parametric objects to create a partial building model. The parametric objects include ordinary elements and massing elements, the massing elements being capable of placing instances of other objects into the spatial database and subsequently passing data to and receiving data from the placed objects.