Full-text search Fulltext search 10 Resultate Behavior-based authentication as an alternative to a plethora of passwords Whether when typing, moving, or walking, scientists are investigating how devices recognize users by their behavior. Converting plastic waste into fuel Scientists have developed a new method to convert plastic waste into hydrogen through pyrolysis, a high-temperature chemical process. World record for tandem solar cells A Swiss research team has succeeded in increasing the efficiency of perovskite silicon tandem solar cells to over 30 percent. This is a world record. Ammonia as a drive for more sustainable shipping Shipping leaves a large ecological footprint: the propulsion engines are largely dependent on energy sources that produce climate-damaging CO2 when burnt. In addition to hydrogen and methanol, ammonia is also considered a more climate-friendly substitute fuel. Wind energy in miniature Scientists in Singapore have developed a low-cost device that can harness the energy of light breezes and store it as electricity. Plastic mix becomes pure propane Cobalt-based catalysts could be used to turn mixed plastic waste into fuel, new plastics and other products. Researchers unveil energy storage concept using a sand cable car Researchers have come up with the vision of a pumped storage power plant of a special kind. Their idea involves a type of cable car that can be used to transport sand or gravel up mountains in order to generate electricity when required by transporting it down the mountain again. An end to flight shame Will we ever be able to fly with a clean conscience again? The good news: Technologies for zero-carbon aviation are already available today. The bad: It will take years to bring them to market. Green Steel Revolution Steel production is responsible for eight percent of CO2 emissions worldwide. Alternative manufacturing processes exist, but the investments are high and the road is long. Two experts provide insights. Cheap raw material for smartphones and solar cells Whether for smartphone screens or solar cells: Precious metals such as iridium or ruthenium are in high demand. Researchers from Basel have developed a cheaper and less toxic alternative.