Some of the first responders to enter future disaster zones might be tiny drones equipped with transmitters designed to reestablish WiFi and cellphone communications.
University of North Texas electrical engineers have unveiled prototypes of the multirotor aerial vehicles that they are designing to fly in pairs after the network goes down. One drone would land in the area—perhaps on a rooftop—and the second would be placed in line of sight of the first up to almost two miles away.
See the video and read more below.
Earlier this month, we spotlighted promising research that has successfully produced biofuel by feeding electricity to bacteria. If it can scale up, this work would answer several current problems inherent in converting solar energy into fuel, a necessity in a world that runs on powerful vehicle engines that need energy-dense liquids to run.
Figuring out solutions to lowering society’s fossil fuel use could potentially help with global issues from energy insecurity to global warming. Yet contemporary biofuels are rife with their own set of problems. Often biofuel crops compete with acreage for food production and increase pressure to clear forests for cultivation. In the case of commodities like corn, which can be used for fuel feedstock and food, fuel production directly competes with food supplies.
Meanwhile, plants are highly inefficient at converting sunlight into chemical energy, averaging little more than 3 percent efficiency. And if fertilizers are needed or trees must be cut to grow biofuel crops, then the process wouldn’t be carbon neutral, a requirement to slow the buildup of greenhouse gases in the atmosphere.
But electricity-eating bacteria aren’t the only contenders for the next generation of renewable biofuels. There are also a number of projects that are starting to see dividends in taking sunlight and converting it directly into chemical energy.