Curating the Internet: Science and technology micro-summaries for October 19, 2019
A circular economy to protect river from industrial salt use; A docking-box completes the autonomous picture for the Skydio autonomous drones; Yale researchers use AI to find patterns in biological cells; A claim that Google's automatic deletion is just window-dressing; a Steem photo-essay on the American Kestral; and a Youtube video of NASA's first all-female space walk
Straight from my RSS feed | Whatever gets my attention |
Links and micro-summaries from my 1000+ daily headlines. I filter them so you don't have to.
- A circular economy for salt that keeps rivers clean - In this TED talk, organic chemist, Tina Arrowood points out that the global volume of fresh water in rivers is so small that they are particularly vulnerable to industrial activity's. Focusing on salt, which gets into rivers in large volumes because of its use melting ice and snow on roadways, she proposes a three step process to keep the rivers healthy. (1.) Reuse/recycle water; (2.) Reuse/recycle salt; and (3.) Develop recycled salt users. She adds that northern China and northern India have already adopted this program in order to rehabilitate their rivers, but she suggests that other countries should adopt them in order to keep their own rivers healthy before they need to be rehabilitated. Because China and India have already adopted this program, membranes that accomplish the water purification through reverse-osmosis already exist. Osmosis is the process that happens naturally in our body to balance salt levels in bodily fluids. In reverse osmosis, high pressure is used to flip the process, purifying some water and producing a heavily salinated concentration in other water. After reverse osmosis, the salty water can be converted into a purified salt solution with "nanofiltration membranes." This product can be sold to states like Pennsylvania, who dumped one million tons of salt on the state's roads during the winter of 2018-2019, and it can be sold to industrial users who account for 39% salt consumption every year. The main drawback that she identifies is that "it costs money", to bootstrap the process, and she adds that fresh water is often "undervalued, until it is too late."
- Skydio's Dock in a Box Enables Long-Term Autonomy for Drone Applications - According to IEEE Spectrum, this is "is probably the most autonomous drone that we’ve ever seen, in the sense that it can fly itself while tracking subjects and avoiding obstacles." Until now, though, it has been completely dependent on humans for charging and storage when it was on the ground. Now, the company has announced their "Dock in a Box" that lets the drone set itself up for recharging and charge itself, too.
Here is a video:
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