Solar cells that provide as much as 50% more power for Earth-orbiting satellites will help flash back telephone and television signals from space. The cells are based on the two-junction, gallium indium phosphide on gallium arsenide designs developed at the Department of Energy's National Renewable Energy Laboratory (NREL) (Golden, CO). TECSTAR Inc. (City of Industry, CA) licensed two patents covering the technology for space use. It has adapted the NREL technology to use germanium substrates for the epitaxial growth of the cells. This, in turn, should result in greater efficiencies and reduced costs for space missions. Commonly used silicon cells lose about half of their efficiency after five years in space. The gallium indium phosphide top layers of the new NREL cells have far more resistance to radiation damage, giving them a much longer space life. E-mail email@example.com.
Samsung's Galaxy line of smartphones used to fare quite well in the repairability department, but last year's flagship S5 model took a tumble, scoring a meh-inducing 5/10. Will the newly redesigned S6 lead us back into star-studded territory, or will we sink further into the depths of a repairability black hole?
In 2003, the world contained just over 500 million Internet-connected devices. By 2010, this figure had risen to 12.5 billion connected objects, almost six devices per individual with access to the Internet. Now, as we move into 2015, the number of connected 'things' is expected to reach 25 billion, ultimately edging toward 50 billion by the end of the decade.
NASA engineer Brian Trease studied abroad in Japan as a high school student and used to fold fast-food wrappers into cranes using origami techniques he learned in library books. Inspired by this, he began to imagine that origami could be applied to building spacecraft components, particularly solar panels that could one day send solar power from space to be used on earth.
Biomedical engineering is one of the fastest growing engineering fields; from medical devices and pharmaceuticals to more cutting-edge areas like tissue, genetic, and neural engineering, US biomedical engineers (BMEs) boast salaries nearly double the annual mean wage and have faster than average job growth.
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