Abstract: The present invention relates to irrigation systems for irrigating a growing medium. The irrigation systems of the invention comprise a helical tubular hydrophilic membrane or a corrugated tubular hydrophilic membrane. The invention also relates to methods of irrigating a growing medium, and helical tubular hydrophilic membranes for use in an irrigation system.

Abstract: The present invention relates to irrigation systems for irrigating a growing medium. The irrigation systems of the invention comprise a helical tubular hydrophilic membrane or a corrugated tubular hydrophilic membrane. The invention also relates to methods of irrigating a growing medium, and helical tubular hydrophilic membranes for use in an irrigation system.

Abstract: An apparatus (2) for placement on or in a body of flowing water (8) for generating hydroelectric power. The apparatus comprises a generally horizontal rotor (6) driven by the water flowing (14) past it to generate electrical power. A method of generating hydroelectric power. The method comprises placing an apparatus in or on a body of water and allowing water to flow past a generally horizontally disposed rotor to turn it and generate electrical power.

Abstract: The present invention relates to irrigation systems for irrigating a growing medium. The irrigation systems of the invention comprise a helical tubular hydrophilic membrane or a corrugated tubular hydrophilic membrane. The invention also relates to methods of irrigating a growing medium, and helical tubular hydrophilic membranes for use in an irrigation system.

Abstract: The present invention relates to the use of a hydrophilic membrane to provide by the process of pervaporation through the membrane water suitable for agricultural irrigation, industrial use, hydrating or rehydrating of food or agricultural or pharmaceutical compositions. The present invention also relates to a water purification apparatus which includes the hydrophilic membrane, comprising one or more layers of hydrophilic polymers, to purify water which may contain suspended or dissolved impurities and solids, including but not limited to seawater, brackish water and other kinds of polluted water.

Abstract: A vehicle display system has a stationary detector and an indicator, which form a stationary vehicle detection apparatus being operative to produce an indicator signal which is indicative of the vehicle being stationary. The vehicle display system also has a vehicle deceleration detector and an indicator. The vehicle deceleration detector measures the magnitude of deceleration of a vehicle and generates a signal to drive the indicator and thereby generate a display indicative of the magnitude of vehicle deceleration. The vehicle deceleration detector is independent of the vehicle braking system. In one embodiment, the indicator is an array of lamps and the stationary vehicle indicator signal is an inanimate display. One embodiment has an additional ranging device that detects a trailing vehicle within a predetermined distance of the vehicle employing the ranging device. The ranging device may be used to initiate a change of the display generated by the vehicle display system.