Abstract: A large scale LED display system (12) is provided on a building structure (100). The system has a screen (12) formed of a number of side by side display panels (14) which may be foldable or rollable. Each panel has a number of equally spaced transparent polycarbonate tubes (80) which house pixel units (50) of LEDs (51) connected to printed circuit board (120) and a row controller (121) for controlling luminance of the LEDs. A bus member (54) convey power and video control signals from a panel controller (77) to each row controller. The panel controller has an initialising process adapted to allocate temporary addresses for the tubes and determine screen size accordingly. Video segments are extracted by the row controllers based on the addresses associated with the video control signals from the panel controller.

Abstract: A life raft or ocean survival unit (1) is capable of self-righting upon capsize, even when occupied by one or more survivors. The life raft (1) comprises a hull-shaped ballast chamber (5) which fills with water upon inflation of the life raft and provides added stability to the vessel and in part see self-righting capabilities to the life raft. Water is sucked in through membrane valves located at the rear of the ballast chamber. The life raft also comprises a canopy (4) and inflatable base section (3), wherein the inflatable base section may be compartmentalised to prevent sinking of the unit in the event of a puncture deflation.

Abstract: A process for preparing salts of mono-esters of sulfosuccinic acid in which maleic acid, fumaric acid or maleic anhydride, especially maleic anhydride, is reacted with a fatty alcohol, an alkoxylated fatty alcohol or a fatty acid alkanolamide; and the butenedioic acid half ester so obtained is reacted with a finely powdered crystalline sulfite of an alkali or alkaline earth metal, by mechanically mixing and butenedioic acid half ester with said sulfite in the absence of water other than that present as water of crystallization in the crystalline sulfite, to yield the desired salt of a mono-ester of sulfosuccinic acid in a solid granular form.