Polystyrene ball levitating using acoustics
Engineers from the University of Bristol have trapped objects larger than the wavelength of sound in an acoustic tractor beam and kept them there stably. Acoustic tractor beams use sound to hold particles in mid-air. Unlike magnetic levitation, they can grab most solids or liquids. The research, which uses ultrasonic waves, could lead to the development...
Japanese carmaker Mazda has released details of its “sparkless” ignition engine SkyActiv-X, which it says improves the efficiency of petrol engines by 30%. The engine uses a combustion method called “Spark Controlled Compression Ignition” to enable a petrol engine to run in the same way a diesel engine and thereby combine the best characteristics of...
US engineers have reduced the size of radio-frequency identification tags by 25% and made them cheaper by eliminating the need for the tags to convert AC to DC power. Traditionally, passive radio-frequency identification (RFID) technology uses a “reader” to transmit a radio signal that is picked up by the tag. The AC of the radio...
Engineering firm Acal Energy has said its proprietary fuel cell has successfully run for 10,000 hours on a test rig, proving its suitability for use in automotive applications. The fuel cell replaces the platinum catalysts in the cathode of a conventional Proton Exchange Membrane (PEM) fuel cell with a liquid catalyst. The “FlowCath” liquid is...
Electric Vehicle company Better Place has filed for bankruptcy in Tel Aviv, an event treated by most as sad but inevitable. The innovative company had at its core technology that combined pioneering “smart grid” infrastructure with battery swapping technology installed in stations. But, despite  the massive achievement of developing the technology to make electric vehicles a...