Stealth Paint From German Inventor Werner Nickel 193
Gerhardius writes "Werner Nickel sounds like a Disney-style wacky inventor. He moved to the UAE to develop his previous invention: he had bred a worm whose excrement made it possible to grow radishes in the dry desert sand. That project failed so he moved on to the next item on his agenda, naturally a radar absorbing paint. While it certainly is not unique, there is some interesting history behind the development, and a proposed civilian use."
Still a long way to go (Score:5, Funny)
But can that excrement allow humans to see the future and travel faster than light?
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What I never understood, is how they ever got to Arrakis in the first place, if you can't get there without the use of a substance only found there
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The Spacing Guild has a monopoly on imperial banking and interstellar travel: with the use of melange, Guild Navigators are the only beings capable of piloting the massive Guild Heighliners safely through space. The heightened awareness and prescience the spice grants allows the Navigator to plot a safe course between the stars.
Heighliner operation requires both a Guild Navigator and a Holtzman generator. The Holtzman generator uses the Holtzman effect to "fold space" and allows virtually instantaneous interstellar travel. The Navigator is responsible for finding a safe path through folded space and guiding the ship. This is accomplished under the influence of melange in the form of orange spice gas. Melange provides the Navigator with the limited form of prescience required.
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Oh, wait.
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a space opera oblig (Score:2)
And you need to go faster than light to reach another planet while you're still young.
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To be utterly pedantic, the spice provided the key to faster-than-light navigation rather than travel/speed. The only way to navigate safely at super-light speed involves information that travels faster than light. It's an interesting point that all other Sci-Fi seems to have ignored; assuming we could travel faster than light, navigation would be
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Err, the entire premise of the book is about the spice. How it affects culture and religion. Youd also have to toss out the bene gesserit, life extension, expanded consciousness, arakkis, etc. You would then end up with a story about a prince who walked around his castle wishing he had better things to do.
Stick to the hard sci-fi instead of trying to mold creative authors into your bor
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But can that excrement allow humans to see the future and travel faster than light?
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Re:Still a long way to go (Score:4, Funny)
Or maybe the author is On LSD (Score:2, Insightful)
When light hits a surface, it can be reflected, or transmitted. If' it's transmitted then it's going to go through the paint and strike the metal and be reflected.
The only way around this for a linear system is if all the following conditions are met
1) the paint absorbs
2) the paint has an index match to air that is perfect.
3) the absorption depth is on the scale of or larger than the wavelength.
If a material is strongly absorbi
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What are you talking about? Matt Black paint, applied to a mirror, does not result in a surface that reflects visible light.
Paint can certainly absorb photons, and translate the energy to a wavelength no longer recognizable as related to the source.
How did the parent post get rated so highly? Has the Slashdot community fallen so far that it's blin
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When light hits a surface, it can be reflected, or transmitted. If' it's transmitted then it's going to go through the paint and strike the metal and be reflected. What are you talking about? Matt Black paint, applied to a mirror, does not result in a surface that reflects visible light.
precisely my point. the black matte is many wavelengths thick in the visible. Radar has enormous wavelengths compared to the paint thickness. If black mat were 100th of a wavelenght thick then either 1) it would impedance match badly and therefore reflect 2) it would not be thick enough to absorb light.
Paint can certainly absorb photons, and translate the energy to a wavelength no longer recognizable as related to the source.
duh. this is known in physics as "absorption".
How did the parent post get rated so highly? Has the Slashdot community fallen so far that it's blinded by the mere mention of "scientific" concepts like index of refraction?
Maybe because I actually know what the hell I'm talking about?
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Let me guess .. (Score:5, Funny)
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Civilian use? (Score:2, Funny)
Re:Civilian use? (Score:5, Informative)
Re:Civilian use? (Score:5, Funny)
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Re:Civilian use? (Score:5, Informative)
The transponders are in the airplanes, not on the airports. They help the airport's radar to see airplanes.
A transponder is a combination of a receiver and a transmitter that receives the pulses from a radar; generates a train of pulses that encode the identification and altitude of the airplane; and transmits them back to the radar. That way the guy sitting at the radar not only sees the airplane more easily, but knows which airplane it is and how high.
rj
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rj
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They also squawk identification codes for each aircraft, and can be set to 7500 to signal a hijack.
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They are totally seperate and unrelated systems operating on radically different frequencies. The only things they have in common is that the base station antenna is typically mounted somewhere on the rotating radar antenna so that they are ensured to both be pointing in the same direction, and they generally share a single display, with the information
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http://www.oei-edu.com/r450.htm [oei-edu.com]
rj
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rj
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No, they are both not radars. I do QA on the maintenance of both of these systems for the US Navy, as well as training and qualifying of technicians. If one of our techs referred to a interrogater/transponder communications link as "secondary radar" I'd tell his supervisor that the guy needs to go back to school.
If a system relies on the target to actively transmit an information-bearing signal, it is NOT radar.
He's quibbling, but it's an important quibble. RADAR = RAdio Detection And Ranging. Both use electromagnetic signal propagation at the core. That is - the same basic physics apply, but for the purposes of avionics they are set up quite differently, use different frequencies, and different protocols. RADAR depends on a bounced signal off of a passive object, and uses the return signal doppler characteristics to resolve into an image, from which information can be derived. A transponder doesn't use pas
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btw. those 'jammers' are useless. By the time they detect the radar it's way too late.
That relies on cars that are ferro magnetic (Score:2)
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btw. those 'jammers' are useless. By the time they detect the radar it's way too late.
I used to have one that actually did work. Most of the time at least. I used to drive by cops at 90mph without getting a ticket. I did slow down when I saw him of course, but by then he could already tell that I was speeding. I think the idea was that cops were so used to relying on their radar equipment that they were really distracted by not getting a reading and by then the speeder had already slowed down. So there wasn't much point in giving chase. I mean they could. But why not go for the easier fish.
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The cop's laser gun tells him when someone jams it.
That may be true now. Are you sure that that detection circuit cannot be defeated or tricked? It was certainly not true when I was jamming. If it had been I would have been pulled over left and right since active jamming was quite illegal in my state even then. I don't think I ever got a ticket while I had that thing. Or at least if I did no cop ever mentioned my jamming him. It was great fun and saved my arse quite a few times. But I always wanted one that was so powerful it would destroy his equipment. T
too late for Bobby Fischer (Score:2)
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Radar traps on the highway... (Score:2)
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My take on this; "Ah crap!"
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If you're getting caught by the speed traps, you aren't going fast enough [youtube.com].
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And the worms ate into his brain.
Uses (Score:5, Insightful)
Perhaps adding a layer of the paint to some consumer products, like PCs, might be a viable way of reducing the R.F. noise (and security issues that go with it?) leaking out.
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You don't need this paint to silence cell-phones in a theatre.. conventional construction techniques already exist to block wireless communication.
Here at the University of Toronto, there are several large lecture halls in the Bahen Institute of Technology building that are shielded, preventing students from using cell-phones, PDAs, wireless internet, etc.
I suspect in the case of movie theatres they have done some studies and decided that for whatever reason it is a better idea not to shield the movie h
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also there are simple devices that can make cellphones useless by interfering with their broadcast frequency (cellphone jammers) but i would think that aluminum foil backed wallpaper would be cheaper long term than a jammer, the advantage of a jammer is that it can be disabled from when the credits roll until the film starts...
i think the main reaso
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I work in a hospital. When I am on call, I go to Blockbusters, not the movies.
Re:Uses (Score:5, Insightful)
A doctor will also be without cell phone service when taking a tour of the Great Mounds Cave. That doesn't mean we should put up cell towers in there. What it means he should not be there while on call. Same goes for a theatre or any other venue where cell reception is naturally or artificially unavailable. Although any venue where a reasonable person would expect cell service but cannot get it, should have reasonable notice. In this case a note on the ticket or at the door to the theatre.
I'm so tired of people trying to make me responsible for their bad decisions. That's what your parents are for. While you're under 18. After that, take ownership of yourself.
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Regardless of who you are, it is not my responsibility to make sure you are available in case of an emergency. If you need to be available, it is your responsibility to adjust your behavior to increase the odds that you are available, given the provided situations you find yourself in.
But it is your responsibility to disable the phones of rude and obnoxious people?
If you want to take that on yourself, why not take a more direct route -- next time someone starts gabbing on the phone go take it away from them and toss it in the parking lot.
I always leave my cellphone on in the movie theater, so my kids can call if they need me. It's on vibrate, in an inside pocket where the light won't bother anyone, and I don't answer it. If it rings, I leave the theater (I always sit near the ais
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At that time, polls had shown that about 85% of the population was favorable to such jammers. I doubt this has changed much.
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But it is your responsibility to disable the phones of rude and obnoxious people?
No, I think it's the option of a movie theater to do so in order to provide a more enjoyable movie experience that doesn't require me to hope the other viewers remember to silence their phones.
This must be much more of a problem in some areas than it is in mine. My wife and I go to a movie pretty much every Friday night -- I doubt we miss more than four or five weeks per year -- and we have done for at least ten years. Call it 400 movies, to be conservative, some 800 hours sitting in the local theaters. In all that time, I can recall maybe four or five instances where a phone disturbed me, and only once was there a patron that carried on a lengthy conversation.
After about five minutes, I w
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However, I would assert that the justification for a movie theater being allowed to use methods that prevent cell phones from working properly in the theaters is that the movie theaters themselves are private property, and thus the owner can set the terms and restrictions of their usage. My bet? Yo
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My guess is the theatres bigger fear is the parent who sues over missing a frantic emergency call from a young baby sitter. A jury will more likely identify and sympathise with a parent looking for a night out, than a doctor who's paid for being available and putting themselves in a situation where they weren't.
It's actually quite simple. Intentionally interfering with the operation of a licensed wireless communications device through the use of any unlicensed device is automatically your fault, in violation of FCC bullshit, and will get you smacked down. The FCC will send someone in to testify against you, and then when you lose, you'll end up paying for that guy's travel and time in the followup suit to recover legal costs.
My guess is the theatres bigger fear is the parent who sues over missing a frantic emergency call from a young baby sitter. A jury will more likely identify and sympathise with a parent looking for a night out, than a doctor who's paid for being available and putting themselves in a situation where they weren't.
If a babysitter has a real emergency they can call 9-1-1 and no one gets hurt. If the
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Copper mesh doesn't count as that. It's perfectly legal to shield a room with mesh, although it's reasonable to post prominent signs to that effect.
MDs often get calls even when not on call (Score:2)
Sure some people are rude, but does a little cell phone ruin the entire movie for you? What about the people who insist on talking the whole time in the movie, or bring their crying kids?
I just don't see the fascination of people wanting to block cell phones - this topic comes up every month or so.
If someon
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Don't forget other places where we don't enjoy being bothered by cell phones or loud phone conversations. Like restaurants, coffee shops, classrooms, the library, etc.
That would be awesome. I don't like hearing people talk on the phone in those places either.
Without much imagination, we could create a society that makes life impossible for people who must be available to receive important calls while they are not at their desks.
Oh come now. Make life impossible? I suppose life began in the mid 90's? There are plenty of places you can get cell service even if every building in the world was shielded. Like outside. Even if every cell network ceased to exist, and became impossible to rebuild, life would go on, and would still kick ass. Phones are nice, but not necessary for life.
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It also means that I cannot go into those building if I have a relative in the hospital, for fear that I might miss an important call to their deathbed, for example
Non-sense. Unless you are a doctor too, instantly knowing of the aggravation of your relative's problem will be of no help. If the hospital is calling you, I suppose they have already had a doctor see it.
Besides, all on-call people I know (doctors, military officers, etc) I know are responsible and avoid becoming "unavailable" when they are on call: they don't travel too far, they will not drink, they will not go anywhere they can't be reached.
I'm a surgeon, and I answer my call OUTSIDE (Score:2)
Doctors who see patients compromise 0.03% of the population - thats 1/30 of one percent or 1 in 3,000 people. So maybe 1 out of 10 movies might contain an MD, if they see movies as often as the general populace, which I doubt.
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It's gonna work out real well for a university that blocks out phone calls like that when someone shoots up the school and nobody knows anything about it.
You'd think safety would be more important than some freshman getting a text with the quiz answers.
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Notice I said "lecture hall", not "exam room".. also, there are phones and PAs hardwired in the room, so if a code were issued instructors would be informed via this means, just like any other school. It's pretty naive of you to think that students' cell-phones are the only way for security information to make its way around a school.
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Right, but for a code to be issued someone would have to know about it. You have a phone or a PA system in one place in the classroom or lecture hall with a gunman rampaging about? Whoever goes to make a call is going to be risking their lives.
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I believe it is intentional, because immediately outside the lecture halls (still inside the building) reception is perfectly fine, but as soon as you pass through the doorway it drops off to nil.
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Too bloody bad. "On call" means "I need to be available," not "I get to inconvenience everybody around me so I can get around a requirement of the job I chose."
And yes, I'm an "on call" sort myself. And sometimes, that means I don't get to go out and do things. Boo hoo, that's kind of the point.
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For the inevitable "But people will still talk on them" argument... Getting peop
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There should be many applications for this (Score:3, Interesting)
Then there is beamed power applications???
Perhaps this might lead to a method of shielding astronauts on their way to Mars? If it can deflect/scatter radar, can it be made to protect the Hubble?
There are literally thousands of applications where some shielding would be preferred to the current methods, especially in Military applications. I think that if he keeps it up, he might well help us discover how to shield from all manner of things. Shielding in Nuclear power plants is an issue that needs to be tackled better.
Imagine that if it can deal with radar, perhaps there is a way that this can lead to better coatings for fiber optic cables? 30Gbps not good enough for you? How would 100 Gbps with FTTH sound? It's all in how you deal with shielding.
Anything that is as thin as paint and does the job can lead to major improvements in many other things. I hope something really good comes of this and not just some Patriot Missle avoidance tactic.
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Antiradar paint does not scatter RF radiation. It absorbs it. If you coated the inside of a microwave oven with that stuff, it would (a) reduce the energy arriving at the food, and (b) heat up the walls of the oven, making your enchilada taste like burned paint.
You want the walls of the oven to reflect, not absorb.
rj
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Actually, no, it isn't. I don't even think it's been an issue that needed to be tackled better within my lifetime. Nor would this help. 20 cm of rolled steel and 1.5 meters of reinforced concrete provides all the radiation protection you need until the pressure vessel ruptures.
Actually, you're 100% wrong, because there is the issue of contamination of the reactor containment vessel. When the plant is decommissioned this material will have to be disposed of somehow. If you can increase SAR of the material to the point where radiation penetrates to a lesser distance, then you don't need as thick a shield (1) which potentially reduces costs through reducing material use and the mass of the total structure (2) and it reduces the mass of the total waste at the time of decommissionin
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Why does a plant need to be decommissioned? The only reason I know if is tree-huggers suing or making it unprofitable to operate. I mean, concrete lasts a really long time, esp if you keep repairing it.
Wow, that's pretty dumb. All things in this world are transient, you know. Or in simpler words, nothing lasts forever.
Anyway, every nuclear plant we have today (at least in the US) should be decommissioned, because they are all crap. But first we need to build some more modern designs.
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Chances are that if it works for stealth applications it is absorbing signals instead of scattering them. In the presence of very strong signals it would heat up if that is the case.
That could still have uses in a microwave oven though, more shielding for the door/cabinet, and perhaps coatings for containers where one would rather generate heat at the container level instead of in the food.
Perhaps this could make it easier to cook egg
Kind of sort of. (Score:2)
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Pimp my Ride (Score:2)
Doesn't everyone start that way? (Score:2, Funny)
he had bred a worm whose excrement made it possible to grow radishes in the dry desert sand.
And here I thought you always had to do a worm breeding apprenticeship before learning the radar absorbing paint trade. That's the way my college career councilor outlined it for me.
From TFA (Score:5, Funny)
civilian use (Score:2, Funny)
Finally, something better looking than tin foil to cover my house (and my hat)!
Is that paint ... (Score:2)
Not new, not even of this century (Score:5, Interesting)
The japanese have been painting RAP on their skyscrapers for decades now to lessen FM and TV ghosting.
Low frequency radar always works (Score:2)
If you want to avoid getting your transmitter killed, just use a local FM or TV station and make it a passive radar system [wikipedia.org].
--Mike--
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Re:Energy = heat (Score:5, Insightful)
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