Rain is normally a solar energy cell’s worst nightmare, but a team of Chinese scientists could make it a tremendous ally. They’ve developed a solar cell with an atom-thick graphene layer that harvests energy from raindrops, making it useful even on the gloomiest days. Water actually sticks to the graphene, creating a sort of natural capacitor — the sharp difference in energy between the graphene’s electrons and the water’s ions produces electricity. The catch is that the current technology isn’t all that efficient. It only converts about 6.5 percent of the energy it gets, which pales in comparison to the 22 percent you see among the world’s better solar panels . If the creators can improve the performance of this graphene-coated cell, though, they could have a dream solution on their hands — you wouldn’t have to live in a consistently sunny part of the world to reduce your dependency on conventional power. Via: Science News Journal Source: Wiley Online Library
An anonymous reader writes: The Linux 4.6-rc1 kernel has been released. New to the Linux 4.6 kernel are a significant number of new features including NVIDIA GeForce GTX 900 open-source 3D support when using the closed-source firmware files, Dell XPS 13 Skylake laptop support, a fix for laptops that were limiting their own performance due to incorrectly thinking they were overheating, AHCI runtime power management support, Intel graphics power management features enabled by default, a new file-system (OrangeFS), and a range of other improvements. Read more of this story at Slashdot. 
Science_afficionado writes to note that the FDA “has approved a powered lower-limb exoskeleton created by a team of Vanderbilt engineers and commercialized by the Parker Hannifin Corporation for both clinical and personal use in the United States.” Indego, which allows people paralyzed below the waist to stand up and walk, is the result of an intensive, 10-year effort. The initial development was funded by a grant from the National Institute of Child Health and Human Development. The device acts like an external skeleton as it straps in tightly around the torso. Rigid supports are strapped to the legs and extend from the hip to the knee and from the knee to the foot. The hip and knee joints are driven by computer-controlled electric motors powered by advanced batteries. The device operates a lot like a Segway with legs and the minimalist design allows users to take it on and off while sitting in a wheelchair. Indego’s clearance came after completion of the largest exoskeleton clinical trial conducted in the United States. It has been available in Europe since November, when it received the CE Mark, the European Union’s equivalent of FDA approval. The initial price is $80, 000. Read more of this story at Slashdot. 