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I am guessing they would end you with some really red hands.
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# ? Sep 10, 2016 22:13 |
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# ? Jun 5, 2024 05:28 |
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So what you're saying is you wonder if it's also useful as a laser rifle that only kills black people?
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# ? Sep 10, 2016 22:13 |
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That's how laser hair removal works. Right through your pale caucasian skin, to burn away the dark hair roots. Doesn't work very well on people with dark skin, can cause burns. Doesn't work very well on people with very pale blond or white hair either. But if you are the perfect combination of pale skin and dark hair it works, and only burns a little bit.
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# ? Sep 10, 2016 22:27 |
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https://www.youtube.com/watch?v=Y0i1SxtzPZA
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# ? Sep 10, 2016 22:29 |
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.
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# ? Sep 10, 2016 22:31 |
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Captain Postal posted:It makes me wonder what would happen if the guy doing it was African. The laser works by being absorbed by dark things and heating them up until they fry, so would there be a difference if someone with more Melanin tried it? It's not a matter of the target being dark; the treatment will also remove fingerprints and oils and other things that aren't dark in color. You're picking a pulse duration and frequency so that the light couples to what you're trying to remove from the metal surface. This is not like laser hair removal where the light is absorbed by the melanin pigment in the hair.
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# ? Sep 10, 2016 22:35 |
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MrYenko posted:So what you're saying is you wonder if it's also useful as a laser rifle that only kills black people? https://www.youtube.com/watch?v=ay4x3Un6PGk
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# ? Sep 10, 2016 22:50 |
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SynthOrange posted:https://www.youtube.com/watch?v=U9z5WdPlToo Ahhhhhh https://www.youtube.com/watch?v=6TN9WNgxsmo&t=24s Hmmmm, beat with a more dramatic version The Glumslinger fucked around with this message at 23:39 on Sep 10, 2016 |
# ? Sep 10, 2016 23:35 |
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Focal length. Notice how much rust it clears off as the distance from the 'gun' varies. Now consider the surface of his fingers while it's cleaning the plate underneath. Even 2 centimeters makes a big difference.
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# ? Sep 10, 2016 23:45 |
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Can we please not get another backseat physics derail?
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# ? Sep 10, 2016 23:51 |
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Mithaldu posted:Can we please not get another backseat physics derail? Backseat physics is pretty cool though. Like when backseats only had lap belts, you had to decide whose life you valued the most. In an accident an imperfectly placed lap belt could cause serious injury. But if the people in the backseat don't wear a belt at all, in a high speed collision they will bash into the back of the front seat, and in can contribute to serious injury for those in the front seat.
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# ? Sep 10, 2016 23:54 |
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I experience physics constantly so I mean I know what I'm talking about
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# ? Sep 10, 2016 23:56 |
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I'm down with back seat physics derails. Reminds me of a video i've seen with a care where the safety belt went all the way from the left door to the right. Kinda wanna see a crash test dummie video of that.
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# ? Sep 11, 2016 00:03 |
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Mithaldu posted:Can we please not get another backseat physics derail? Fine, I'll see your electrical safety video and raise you 1950's. https://www.youtube.com/watch?v=XQUMds57I2I&t=531s My Pop's a Lineman, and he's always dealing with pesky hunters hunting insulators. Edit: "Thoughtless hunters" look a lot like domestic terrorists.
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# ? Sep 11, 2016 00:09 |
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That's some hilariously dramatic music.
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# ? Sep 11, 2016 00:12 |
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# ? Sep 11, 2016 00:12 |
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Effective-Disorder posted:Focal length. Notice how much rust it clears off as the distance from the 'gun' varies. Now consider the surface of his fingers while it's cleaning the plate underneath. Even 2 centimeters makes a big difference. It's columnated though. That's what lasers do. It all comes down the the absorption of the sample at the wavelength of the laser, and the energy the laser puts out over the pulse length. As someone pointed out way back in the thread, (white) skin doesn't absorb CO2 laser primary wavelength all that well (although if you add in a frequency doubling crystal you're pretty hosed), although retinas do. So these things can pass over skin without harming if you set it up correctly, but you always need eye protection from reflections.
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# ? Sep 11, 2016 00:14 |
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https://www.youtube.com/watch?v=meiuOQHTsNg
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# ? Sep 11, 2016 00:26 |
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Hot starts are a bitch. Keep that fucker turning and pull it back to the gate.
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# ? Sep 11, 2016 01:25 |
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Effective-Disorder posted:Edit: "Thoughtless hunters" look a lot like domestic terrorists. https://en.wikipedia.org/wiki/Metcalf_sniper_attack
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# ? Sep 11, 2016 01:31 |
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One new concern was the code named "AURORA" attack. Basically, that's where someone either breaks into a SCADA system or the substation itself and opens and closes distant circuit breakers that parallel a power plant's generators to the power grid. By opening the breaker, waiting, and closing it again, it's possible for the generator to drift out of synchronism with the power grid and basically short-circuit when it's reconnected connected. In the worst case this could result in serious damage to the transmission system components, generator, and the turbine. (Many millions of dollars in damage. Turbines and generators in the hundred or 1000+ megawatt range are not off-the-shelf components.) The problems are that there are checks, often redundant, to make sure breakers that connect generators to grids close when the generator is synchronized. Distant breakers may not check for synchronism. Three-Phase fucked around with this message at 02:08 on Sep 11, 2016 |
# ? Sep 11, 2016 02:06 |
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My favorite thing about the laser rust gun is that it sounds exactly like a lightsaber, so apparently Star Wars was prophetic there.
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# ? Sep 11, 2016 02:23 |
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As for where the lightsaber sound actually originates:Ben Burtt posted:
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# ? Sep 11, 2016 02:30 |
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Captain Postal posted:It's columnated though. That's what lasers do. Collimation, I think is not quite what's happening here with the optics involved and the visible difference in rust removal with distance. I don't know how the beam splitter works on that thing to make the line, so I'm leaving this at 'well, I think so'. But yeah, that's why they use these carbon dioxide lasers for surgery. You have to focus it well, and then it's just precise radiant effects. You're at least as right as I am, and you probably haven't been shot with a laser, and neither have I (too much), so we both have that going for us.
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# ? Sep 11, 2016 06:54 |
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You can see in this video what happens when it hits the dark spots: https://www.youtube.com/watch?v=L2gjveVliqc And this page has the results of using it on dark skin with the wrong settings. http://hubpages.com/style/Laser-hair-removal-pre-op-care-after-care-dangers-side-effects
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# ? Sep 11, 2016 07:16 |
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Effective-Disorder posted:My Pop's a Lineman, and he's always dealing with pesky hunters hunting insulators. Really? you're going to take someone vandalizing a power line and label them a "domestic terrorist". That puts the bar at a pretty shocking - and dangerous low. No pun intended. EDIT: Yeah, I missed your point, and I agree with you, attitudes have changed a lot, "the war on terror" has changed a lot of attitudes,some not for the better. I can imagine some idiot hunter shooting an insulator for a bit of target practice,and getting caught, and then the Podunk local cops puffing themselves all up and leveling some crazy-rear end domestic terrorism charges against the guy just because they can. Also to maybe to get a plea-bargain to something lesser? RoboJiggolo fucked around with this message at 09:33 on Sep 12, 2016 |
# ? Sep 11, 2016 12:06 |
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RoboJiggolo posted:Really? you're going to take someone vandalizing a power line and label them a "domestic terrorist". It was more of a commentary contrasting today's attitudes to the 1950's 'Leave It To Beaver' tone of the film. I mean, I didn't intend to move the line anywhere, I'm just pointing out that people seem to be under high tension these days.
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# ? Sep 11, 2016 16:11 |
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Honestly, i always expect those old videos to get interrupted by a bright flash and everybody diving into the nearest ditch.
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# ? Sep 11, 2016 16:17 |
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RoboJiggolo posted:Really? you're going to take someone vandalizing a power line and label them a "domestic terrorist". They didn't vandalize a power line, it's not like they spraypainted the transformers with their tags. Without knowing their motive we can't say they were terrorists or not but it's certainly possible and what transpired was a lot more serious than vandalism. You should pay more attention to current events.
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# ? Sep 11, 2016 16:23 |
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Effective-Disorder posted:My Pop's a Lineman, and he's always dealing with pesky hunters hunting insulators. Wasn't it Mel Brooks who got a medal in WWII doing that? I think the story goes that he and his squad were returning from a boring, uneventful patrol and decided to have a little fun betting on who could shoot the most insulators off the power lines. When they eventually go back to base, they were called in front of some officer who asked them if they had encountered any enemy activity because evil German snipers had knocked out their power. Oops. They also needed some brave men to escort combat engineers out into the field, crawling with snipers as it was, and protect them as they replaced the insulators. Naturally, Brooks' team volunteered because they knew the only people out there shooting power lines was them. So off they all went and even got a medal for bravery out of it.
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# ? Sep 11, 2016 16:38 |
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Gorilla Salad posted:Wasn't it Mel Brooks who got a medal in WWII doing that? Mel Brooks was a combat engineer, though.
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# ? Sep 11, 2016 16:48 |
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Well, at least the industry is concerned about hunter safety. Those porcelain insulators tend to create dangerous fragments. https://www.youtube.com/watch?v=Totp_hz7ViQ&t=43s
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# ? Sep 11, 2016 16:52 |
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http://www.dispatch.com/content/stories/national_world/2016/09/11/0911-trinity-college-house-deck-collapse.html Three stories of decking pancaking on atop another is bad but I want to hear more about this 30' beer column, that should be putting out what about 15 psi at the bottom? Sounds like a bad time.
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# ? Sep 11, 2016 16:53 |
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I'm dumbfounded that plinking insulators has been or is apparently actually a "thing". Why the hell would people ever do that?! Not enough birds to shoot or something?
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# ? Sep 11, 2016 17:19 |
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Phanatic posted:Mel Brooks was a combat engineer, though. I don't remember any talk of a medal but I did take my parents to a Mel Brooks QnA and there he said his scouting patrol found German rifles and decided to play around with them and that's when that story happened.
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# ? Sep 11, 2016 17:40 |
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eljackass posted:I'm dumbfounded that plinking insulators has been or is apparently actually a "thing". Why the hell would people ever do that?! Not enough birds to shoot or something? It's still a thing, apparently. Only now they're taking out your internets. http://www.itnews.com.au/news/us-hunters-shoot-down-google-fibre-232831 quote:Gill said that on one occasion, a snowstorm and avalanche prevented Google from transporting repairers and gear into the area of the cut.
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# ? Sep 11, 2016 17:42 |
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Effective-Disorder posted:It's still a thing, apparently. Only now they're taking out your internets. Kill them all.
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# ? Sep 11, 2016 19:11 |
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Sabotaging infrastructure (I'm talking beyond spray painting a transformer box) is domestic terrorism.
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# ? Sep 11, 2016 20:11 |
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SynthOrange posted:https://www.youtube.com/watch?v=U9z5WdPlToo https://www.youtube.com/watch?v=QBOfQBHYqRY
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# ? Sep 11, 2016 20:56 |
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# ? Jun 5, 2024 05:28 |
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Three-Phase posted:Sabotaging infrastructure (I'm talking beyond spray painting a transformer box) is domestic terrorism. Terrorism is about motivation, not action. If it's not done to terrorize it's not terrorism.
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# ? Sep 11, 2016 22:58 |