Abstract: The present invention provides an improved modular algal aquaculture system and method including a modular algal aquaculture component having a cultivation surface having a first end and a second end, a supply header located adjacent to one of the first end and the second end, a return header located adjacent to the other of the first end and the second end, a reservoir, the reservoir in fluid communication with the supply header and the return header, a pump, the pump in fluid communication with the reservoir and at least one of the supply header and the return header.

Abstract: A multi-spool gas turbine engine of the type having an annular inter compressor duct connecting a low pressure compressor to a further compressor stage, and having improved bleed means for bleeding off a variable amount of air from the duct when the engine is being operated at partial load. The bleed means comprises opening means arranged circumferentially around the outer wall of the duct, and pivotally mounted air deflectors for deflecting air flowing in the duct outwardly through the openings in the outer wall of the duct. In accordance with the invention, the air deflectors are flaps forming a circumferential array, and sealing elements are provided movable with the flaps and interconnecting the side edges of adjacent flaps to largely prevent radial flow of air between adjacent flaps.

Abstract: There is described a non-invasive device designed to assist expectoration pulmonary secretions in humans, particularly in those whose natural exhalation and natural coughing ability are impaired. The device has a valve that opens fully in not more than 10 milliseconds, a pressure sensing means generating a signal indicative of a pressure in the upper part of the subject's respiratory tract, detecting means indicating the imminent collapse of the subject's respiratory tract or a part thereof, and control means opening or closing the valve respectively in response to the signals from the sensing means and the detecting means so as to create supramaximal flows in the respiratory tract in order to stimulate the movement of secretions towards the mouth of the subject.