Roboticists are putting a tremendous amount of time and effort into finding the right combination of sensors and algorithms that will keep their drones from smashing into things. It’s a very difficult problem: With a few exceptions, you’ve got small platforms that move fast and don’t have the payload capability for the kind of sensors or computers that you really need to do real-time avoidance of things like trees or powerlines. And without obstacle avoidance, how will we ever have drones that can deliver new athletic socks to our doorstep in 30 minutes or less?
At the University of Pennsylvania’s GRASP Lab, where they’ve been working very very hard at getting quadrotors to fly through windows without running into them, Yash Mulgaonkar, Luis Guerrero-Bonilla, Anurag Makineni, and Professor Vijay Kumar have come up with what seems to be a much simpler solution for navigation and obstacle avoidance with swarms of small aerial robots: Give them a roll cage, and just let them run into whatever is in their way. Seriously, it’ll be fine!
This kind of “it’ll be fine” philosophy is what you find in most small flying insects, like bees: They don’t worry all that much about bumbling into stuff, or each other, they just kind of shrug it off and keep on going. Or, if you’re a roboticist, you might say something like, “The penalty due to collisions is small at these scales and sensors and controllers are not precise enough to guarantee collision free trajectories,” so stop trying to solve the collision problem, and just focus on not completely trashing yourself when you hit something. (Swiss startup Flyability was among the first to demonstrate the benefits of collision robustness by equipping a regular-size drone with a gimballed protective cage and flying through forests and ice caves.)
#Yes
The wood siding could age badly unless it's well-treated, but otherwise cool.
Vote down ballot - the presidency isn't the only office of importance!
Time for another political essay. If you’re not an American citizen or able to vote in this upcoming election, my apologies.
I make no secret that I fucking despise Donald Trump. I actually like Hillary Clinton, which seems to be a weird rarity considering the amount of good work she’s done and the fact that all of the bad press about her is the result of the Republicans trying (and failing) to tear her and her husband down for thirty years.
Trump is now trailing far behind Clinton, which I consider a cause for celebration. But it is NOT a cause for complacency.
The biggest landslide election in US history was the election of Warren G. Harding in 1920, when Harding won with about 60% of the vote to his opponent’s 34.2%.
Some polls are reporting Trump with as little as 35% of the popular vote right now.
If turnout is large enough and loud enough, we can make Donald Trump the least supported major candidate in US history. Since the recording of him bragging about sexual assault came out, he has turned to dragging the whole election into the mud by striking back at Bill Clinton’s affairs; the usual goal of that kind of tactic is to drive down voter turnout. Trump’s band of Redcaps is pretty much guaranteed to vote, so they figure if they reduce turnout enough, they’ll win.
I want their plan to fail. I want their plan to fail so fucking spectacularly that NO ONE will dare to run for President on a platform of thinly-veiled fascism again.
The Republicans thought the House of Representatives was safe this year. In 2010, they gerrymandered the shit out of district lines to keep the House safe for them for at least ten years. But there’s a problem with gerrymandering: if the demographics shift unexpectedly between censuses, then suddenly a lot of districts wind up flipping against the party that the gerrymandering was meant to support. And Donald Trump is driving away the Republicans’ most secure core of voters, the evangelicals. And as I’ve said before: Congress is MORE important than the presidency.
If turnout is strong enough, and if people vote down ballot, the possibility exists for a massive upset. A Democratic presidency, a Democratic House, a Democratic Senate. They’re within our grasp. All you need to do, voters, is show up.
Motherfuckers don’t want you to vote. Young people, people of color, women, LGBTQ+ folks–they want you to be scared away, or to be convinced that voting doesn’t matter. They want your voice silenced. Don’t give the fuckers the satisfaction of letting it happen.
GO VOTE. VOTE DOWN-BALLOT. MAKE TRUMP THE BIGGEST LOSER IN US HISTORY.
IF YOU CAN’T BE BOTHERED TO VOTE OUT OF CONVICTION, THEN DO IT OUT OF SPITE.
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Eugenics was massive in the US, however much we pretend it wasn't
The U.S. Supreme Court in 1927 decided, by a vote of 8 to 1, to uphold a state’s right to forcibly sterilize a person who was deemed unfit to procreate. The case Buck v. Bell legitimized the eugenics movement – yes, the thing Hitler and the Nazis believed in – and directly led to the sterilizing of 70,000 American citizens against their will.
science news: another incredibly smart and driven woman who discovered really important things just died without receiving recognition in her lifetime for any of her groundbreaking crucial work after decades of brutally unfair sexism click through for even more in depth accounts of the monstrous amount of sexist bullshit she had to put up with every single day of her goddamn life
science news: girls today are hesitant to go into STEM fields for some reason
Science marches on, and our understanding of dinosaurs is constantly being updated.
And, sometimes, it’s funny how certain changes seem to be accepted by the general public easier than others.
The largest known Egyptian obelisk is called the “unfinished obelisk”, which today can be found exactly where it was once semi-carved from the solid bedrock. This stone block was intended to be a 120ft tall obelisk. It is estimated that a block of granite this size would easily weigh more than a 1000 tons, some geologists have suggested a figure in the region of 1100 tons – 1150 tons.
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Gaming, Science, History, Feminism, and all other manners of geekery. Also a lot of dance
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