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How Lasers are Making Dangerous Air Flight Stages Safer Image Credit: aapsky/Shutterstock.com The landing phase is the most intensive stage of an aircraft’s flight. According to Szondy (2021), up to 40% of crashes occur during this phase. This is likely due to the method of landing, in which pilots use visual cues and peripheral vision to judge their landing. These cues can be inaccurate or hard to see in situations of poor visibility. AirText, a company already versed in aircraft hardware, is using its new product, Land-DAR, to make this phase simpler and safer for small a...

This story is part of a group of stories called 2021 marks the 20th anniversary of The Lord of the Rings movie trilogy. In honor of the enduring classics, we're exploring every aspect of Peter Jackson's trilogy, from JRR Tolkien's source material to the best scenes and moments, along with the continued influence of Fellowship of the Ring, The Two Towers, and Return of the King on modern pop culture. Peter Jackson’s Lord of the Rings trilogy contains one of the great mysteries of our modern age. It’s a question that has been asked among friends, on Reddit, on Quora, on Stack Excha...

Why is it a bad idea to filter by zeroing out FFT bins? $\begingroup$ It's very easy to filter a signal by performing an FFT on it, zeroing out some of the bins, and then performing an IFFT. For instance: t = linspace(0, 1, 256, endpoint=False) x = sin(2 * pi * 3 * t) + cos(2 * pi * 100 * t) X = fft(x) X[64:192] = 0 y = ifft(X) The high frequency component is completely removed by this "brickwall" FFT filter. But I've heard this is not a good method to use. Why is it generally a bad idea? Are there circumstances in which it's an ok or good choice? $\begingroup$

see my "final pretrial Twitter thread"). I'm not like those New Year's resolutioners starting to smoke again a week later. This post is not about the trial itself or the antitrust matters involved, but about suspicious social media activity of the astroturfing kind. It's publicly discoverable that Epic Games founder and CEO Tim Sweeney and I follow each other on Twitter, and sometimes retweet or like each other's tweets. Other than that, I don't know him and I'm 100% independent from Epic. I have my own app store issues. In recent weeks there's been quite some suspicious activity on Twitter. ...

Richard Borcherds is a British mathematician at Berkeley, who won the 1998 Fields Medal for the proof of the monstrous moonshine conjecture among many other contributions. A couple months ago, Borcherds posted on YouTube a self-described “rant” about quantum computing, which was recently making the rounds on Facebook and which I found highly entertaining. Borcherds points out that the term “quantum supremacy” means only that quantum computers can outperform existing classical computers on some benchmark, which can be chosen to show maximum advantage for the quantum computer. He al...