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These two astronauts are both veterans of multiple Shuttle missions, one was a flight test engineer and the other was a fighter pilot, and both had input on the design of the UI. I’m not super comfortable with the touchscreen interface either, but as others have pointed out, there’s physical buttons for critical functions. With few exceptions, most astronauts or cosmonauts are just sitting there during the ascent to orbit. Watch a Soyuz launch sometime and you’ll see what I mean. They might hit a button or two, but the entire launch-to-orbit and reentry procedure is automated and has been since basically the dawn of spaceflight; anything during launch that you can’t fix with the physical buttons on Crew Dragon is probably a scenario that triggers a mission abort anyway. While “SCE to AUX” on Apollo 12 is a notable exception, launch procedures, automation, and spacecraft design have come a long way since 1969- along with rules like “don’t launch into a thunderstorm”.
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May 28, 2020 00:48
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I'm not an expert in this, so consider this just wild speculation- but I wonder how much of a market there is really is for SSTs? The advent of cheap and high-quality videoconferencing software and the ubiquity of fast internet seems to me like it would cover most of the "I need to go do business across the ocean, quickly" use case that dominated the clientele for Concorde.
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Jun 17, 2020 06:14
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Dunno about the camera operator, but the guy in front is very lucky the window he was looking out of was open.
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Jun 21, 2020 06:10
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https://www.youtube.com/watch?v=kq7DDk8eLs8 https://www.youtube.com/watch?v=lDxOhfiFsuc Now, instead of a jerry can full of water, imagine that this is an 80kg human being (composed of 60% water). A rare case where real life is more spectacular than the movies.
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Aug 5, 2020 20:50
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Methylethylaldehyde posted:
what happens if you take a half in each hand and slam them together as hard as you can. would there be any yield or would you just give yourself the Slotin treatment
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Aug 7, 2020 10:16
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what effect does making fissile material dildo-shaped have on criticality. asking for a friend
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Aug 7, 2020 19:18
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Batterypowered7 posted:https://i.imgur.com/3C5Ln3n.mp4 https://www.youtube.com/watch?v=A0J8wmucIbM
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Aug 17, 2020 01:48
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A roadcut is by its very definition producing an oversteepened slope that is out of equilibrium from the natural angle of repose of the hillside. Rock/debris falls and increased erosion are fundamental consequences of such a thing, but the processes that actually bring said slope back into equilibrium are pretty slow, so when part of that process occurs on human timescales it catches our attention.
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Oct 8, 2020 10:07
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In case you'd like a visualization of the number of satellites in orbit, try Stuff In Space. And remember, that's only large, catalogued objects like rocket stages or defunct satellites. Even a pea-sized piece of debris is capable of crippling a satellite when it impacts at 17,000 miles per hour- or more, if you're going opposite directions.
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Oct 14, 2020 07:03
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BitBasher posted:To be fair though, there shouldn't be many counter (retrograde) rotating objects in space. There's a reason that almost everything is launched with the spin of the earth. Sun-synchronous orbits are slightly retrograde polar orbits, and are quite popular because you pass over the same place at the same time every day. https://twitter.com/LeoLabs_Space/status/1316410784075972609 Luckily for us, this particular collision is between two satellites going almost the complete opposite direction. Clearly, they'll just hit each other, their momentum will cancel out, and all the debris will fall straight down!
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Oct 14, 2020 22:48
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Brown Moses posted:Forensic Architecture just put together a video reconstruction of the Beirut Port Explosion, which demonstrates how you accidentally build a giant bomb in the middle of a major city by ignoring safety regulations This is from a few pages back and nothing new, but there's a special level of  to the 2,750 tons of ammonium nitrate being stored in the same warehouse as 23 tons of fireworks and five rolls of detcord.
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Nov 18, 2020 08:37
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I don’t know what I expected to happen in the tank video, but it certainly wasn’t that. (What is the white < on tanks for?)
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Nov 23, 2020 06:50
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Ornamental Dingbat posted:Also wouldn't it be more visible on a phone camera as a light source? Like how your phone's camera can see the light from a TV remote? Memento posted:Should go a weird purple colour from a large heat source, right? Platystemon posted:Some cameras have actually good filters for blocking infrared light. iPhone cameras are better than most in this respect. In addition to infrared blocking filters, the silicon in camera sensors stops being sensitive to infrared light at a wavelength around 1000nm (the red limit of visible light is somewhere around 700-750nm). Anything longer wavelength than that- such as "thermal" IR, which is more in the 5000-15000 nm range- requires specialized sensors, like InSb or HgCdTe. If this is a thermal IR source, or even an intense near-IR source, it wouldn't necessarily show up on the camera the same way that the "very near IR" of 750-1000nm does. I use terms like "near IR" or "thermal IR" very loosely, as every field defines infrared light differently. Luneshot fucked around with this message at 07:24 on Dec 8, 2020 |
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Dec 8, 2020 07:21
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https://grist.org/justice/tva-kingston-coal-ash-spill-nuclear/ Here’s a “fun” one about coal ash and Oak Ridge. quote:In internal TVA emails, Davis said he informed Thacker that cesium-137 stopped the dredging, but he didn’t include details of its deadly effects or even a description of the substance. If containers of cesium-137 are opened, the radionuclide looks like a white powder. Jeff Brewer, a truck driver, described such a powder in an interview with me this spring. Brewer told me he was hauling ash and dirt from a newly dug ditch at the Kingston spill site when an operator in a trackhoe ripped a barrel of white powder out of the ground. The black lid of a 55-gallon drum dangled off the end of his bucket, while two or three more drums sat uncovered in the ditch below. quote:According to the affidavit, a Jacobs safety manager, with the support of TVA supervisors, ordered his workers to remove personal protective equipment and destroy common dust masks. (At the onset of the cleanup, many workers had supplied their own safety gear or acquired it from Kingston’s utility room.) The supervisor allegedly stated “that the site was a CERCLA site and that if they wore dust masks or respiratory protection, it would change the status of the site.” A heavy equipment operator recalled at trial that this same safety manager once told him: “If these people knowed what was in this ash, they’d quit.” ... Only four employees ever managed to obtain Jacobs’ approval to secure and use dust masks, though records indicate that dozens asked. Court records also confirm that dust masks were destroyed on site by Jacobs supervisors. No one at the spill site ever received a respirator. quote:At least 27 soil and ash samples were collected from at least 20 different sites surrounding Kingston beginning January 6, 2009. The levels ranged from 84 parts per million (ppm) to 2,000 ppm. The average level was over 500 ppm, as much as 50 times the typical uranium content found in coal ash.
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Dec 17, 2020 16:15
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Karia posted:Oh, yes. That's extremely easy from an energy standpoint. Escape velocity for Earth is roughly 11km/s, which means that you need 62 mega Joules of energy per kilogram of material you want to yeet into orbit. So if you can get 62.1 MJ of energy from a kilogram of uranium, you're coming out ahead. Once you've left Earth, you still have to remove all of Earth's 30 km/s orbital velocity in order to actually drop the waste into the Sun. It's much easier to just leave the solar system entirely, because solar escape velocity at 1 AU is like 42 km/s, and you already have ~30km/s of that by virtue of starting at Earth.
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Dec 20, 2020 09:25
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Platystemon posted:I know Luneshot knows this, but rockets can take advantage of this discrepancy to get to the Sun the slow and cheap way. True. And then again, it's nuclear waste...it's not like we're on a time limit.
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Dec 20, 2020 10:20
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New Super Criticality Brothers U (& Knuckles) In nuclear OSHA content, how about the Fernald Feed Materials Production Center: https://en.wikipedia.org/wiki/Fernald_Feed_Materials_Production_Center Featuring: A large uranium processing plant is built 30-50 feet above an aquifer, a new phrase to add to our collection: “safe geometry digestion system”, stray puddles of nitric acid so commonplace the facility employed cobblers to fix workers’ boots, hundreds of thousands of pounds of uranium dust released into the atmosphere, a worker reportedly involved in whistleblowing the above has an argument with his supervisor, disappears, and his remains are discovered in a uranium processing furnace in a different building than he worked in (no foul play suspected, of course), and a Superfund site in a pear tree.
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Mar 11, 2021 15:14
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Aren't step potentials responsible for more lightning deaths than the stroke itself?
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Mar 12, 2021 03:07
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LanceHunter posted:No, the true terror will come when parents are so accepting that they insist on holding a second, updated gender reveal party for the kid, with even bigger explosions. Project Plowshare gender reveal
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Mar 30, 2021 20:34
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Today I saw someone working under a car that was propped up not with jack stands or even a jack, but one (1) wheel. The rest of the car did not look balanced enough on the wooden chocks to stay put if said wheel had decided to take a vacation.
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May 10, 2021 03:21
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the open ocean literally boiling with flame is the kind of poo poo that looks so cognitively dissonant that it's a little difficult to comprehend on first glance
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Jul 2, 2021 23:05
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https://twitter.com/GDOTEastTraffic/status/1415628773488222211
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Jul 15, 2021 17:21
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I have never seen a fiber line. Is it the sort of thing that could be damaged even with an errant shovel, or is it robust enough that you only really need to worry about hitting it with mechanized digging equipment?
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Aug 12, 2021 09:29
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I imagine that scenario could also be very unpleasant if you made the mistake of holding a lungful of air before an explosive decompression.
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Aug 21, 2021 06:49
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In some port cities around the Great Lakes there are a few lake freighter museum ships; they're worth seeing if you have even a mild interest in big ships.
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Aug 26, 2021 06:34
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This might be total bullshit, but I've heard that professional racecar drivers are trained to let go of the steering wheel before hitting a wall - because upon impact, the wheel deflection can rotate the steering wheel so hard that it will shatter their wrists.
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Aug 27, 2021 21:50
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forbidden pizza
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Sep 1, 2021 06:49
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Maybe we should start with A) continuing to reintroduce wolves and B) letting them loose on the people who kill the reintroduced wolves
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Sep 4, 2021 21:22
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Do you want to go whitewater rafting, but absolutely hate getting wet? We have a solution for you.
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Sep 5, 2021 03:10
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Here's a long Twitter thread from the perspective of a movie armorer. https://twitter.com/sl_huang/status/1451797888158375937
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Oct 23, 2021 17:02
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Now that’s some Halloween-themed content right there.
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Oct 31, 2021 19:11
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It’s extra OSHA that the toxin in Gyromitra, monomethylhydrazine (MMH), is literal rocket fuel.
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Nov 1, 2021 15:00
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There were a lot of near-misses in the Shuttle program, but I can’t find any references to such an event. STS-41-B was in 1984, not 1985. There was some concern over an ice chunk on STS-41-D, but it was broken off with the robotic arm while in orbit, and that was Discovery, not Challenger. edit: Mike Mullane does mention the tile damage incident in Riding Rockets. Luneshot fucked around with this message at 13:42 on Nov 3, 2021 |
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Nov 3, 2021 13:39
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Reminds me of Garry's Mod. *Source Engine collision noises*
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Nov 27, 2021 17:31
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I'm guessing helicopter. I don't think any zip line goes that high.
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Dec 21, 2021 00:30
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There's only one helmet, and the most important passenger gets to wear it.
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Dec 28, 2021 18:20
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Ornamental Dingbat posted:How else are you going to store your extra cinderblocks? On the ground? Like a caveman? Tied to a motorcycle so nobody can steal them.
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Jan 4, 2022 02:55
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nomad2020 posted:https://www.science.org/content/article/france-issues-moratorium-prion-research-after-fatal-brain-disease-strikes-two-lab Christ, that's loving awful.
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Jan 21, 2022 18:03
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How often are JATOs actually used operationally? Also, the U2 is pretty OSHA when at operating altitude; there’s only about 5-10 knots between going so slow you stall and going so fast you’re unstable due to transonic aerodynamics. This is colloquially known as the ”coffin corner”.
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Feb 14, 2022 21:10
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https://twitter.com/trrvvb/status/1497714299287920640 "relax"
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Feb 27, 2022 00:55
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