In this episode, we talk about a research out of Stanford University shedding light on the effectiveness of artificial intelligence policing social media, How studying Marsquakes is providing valuable insight regarding the red planet’s origin, and an EPFL effort to prevent lead leakage from solar cells into the environment using phosphate salts. As always, you can find these and other interesting & impactful engineering articles on Wevolver.com.
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(0:47) - AI Struggles To Police Social Media:
In the last 3 months of 2020, Facebook’s AI for detecting hate speech, toxicity, and misinformation removed 27 million posts. Automated moderation is the only viable solution for all the major social media platforms but it makes you wonder: how accurate is it really? Stanford researchers have decided to take a look at the reported 95% effectiveness of a traditional content policing AI and their work shows that the number is significantly reduced once the model is trained on a data set that integrates consensus of people on what constitutes as hate speech.
(10:30) - Marsquakes Shed Light On The Red Planet’s Origins:
We recently talked about how Venusquakes can give us valuable insight on the inner workings of the planet and now there is a new article coming out of ETH Zurich and U Zurich where the same is being done with Mars. The Martian inSight lander has been recording seismic activity from the red planet over the past 2 years and analysis of Marsquakes from the opposite side of where the lander is stationed has taught us a few things: a) the core is molten with a 1,840 km radius, b) it is structured similarly to earth (core, mantel, crust), and c) unlike planet earth the crust is a single solid piece 20 km thick.
(17:30) - Preventing Lead Leakage From Solar Cells:
Perovskite solar cells are leading the industry with 25% solar energy to electricity conversion efficiency; however, the water soluble lead that enables their high performance is a point of concern for environmentalists. Professor Laszlo Forro from the EPFL School of Basic Sciences recently published a study that outlines how to prevent this lead leakage by integrating phosphate salts that can bind with lead to create a recyclable, water insoluble compound without compromising the cell’s efficiency.