Abstract: A rotational power transfer device includes a rotatable shaft, a plurality of arm structures attached to the shaft and extending radially outward from the shaft, a plurality of panel members attached to the arm structures and hanging downward therefrom, and an energy converting member for converting energy to electricity. Another vertical turbine is includes a rotatably driven power maker using panel members connected to a drive shaft such that the panel members are laterally disposed from the drive shaft in a spaced relation therefrom. A wind power generation system includes a turbine and roof top wind collector.

Abstract: A method for facilitating fusion of bone structures includes providing an implant member for positioning between opposed bone structures, the implant member having a first end and a second end, and a segmentable portion having an outer wall defining an internal cavity for reception of bone growth inducing substances. The outer wall has at least one groove which extends substantially continuously about the outer wall to define a plurality of discrete ring-like segments. Each ring-like segment includes a plurality of apertures extending therethrough in communication with the internal cavity to permit fusion of vertebral bone tissue. The vertebral space defined between adjacent vertebral bodies is accessed, and the desired implant member length for insertion into the space between adjacent vertebral bodies is determined. The implant member is cut to the desired length and advanced within the vertebral space between the adjacent vertebral bodies.