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User: Carnildo

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  1. Re:BS Flag on One In Eight Chance of a Financially Catastrophic Solar Storm By 2020 · · Score: 1

    Based on the pattern of isotope abundances in ice cores, a Carrington-type event happens about once every 500 years.

  2. Re:Laser Beams on Ask Slashdot: What Would Real Space Combat Look Like? · · Score: 1

    Like some of the other posters, you don't seem to grasp the concept of "combined arms". Even with today's technology, which does not include ship-killing lasers, photon torpedos and the like, a warship would presumably mount multiple weapons. So - the shuttle has AIM-54 missiles at it's disposal? What else does your ship mount? Unless this is the very first time a Phoenix has been used in a space duel, we can presume that the ship mounting a machine gun also has some sort of ECM, maybe some flares, and just maybe a missile or two of it's own.

    I'm not sure what else I'd mount, but all the offensive weapons would have one thing in common: they would be capable of mid-course trajectory changes. There's no point in lugging along something that can't hit the enemy.

    A machine gun doesn't even make a very good point-defense weapon unless you're in a situation where it's worthless as an offensive weapon. You can't "shoot down" an incoming missile, all you can do is disable the guidance system and maybe cause the missile to break up; you still have faster-than-a-speeding-bullet debris coming at you. Either you've got enough armor to shrug that off, in which case machine-gun fire isn't going to bother you, or you've got enough acceleration to dodge it, in which case machine-gun fire can't hit you.

    One thing you miss in "which side retains a functional close range weapon" is that unless you've crippled or destroyed the opponent, they retain a close-range weapon in the form of the ship itself. Practical machine-gun range isn't much greater than ramming range, and in a space combat situation, I wouldn't want to get close to an opponent's ship unless they'd surrendered or I was convinced the ship was a lifeless hulk.

  3. Re:Laser Beams on Ask Slashdot: What Would Real Space Combat Look Like? · · Score: 1

    The problem with guns is flight time. Assume you're engaging the Space Shuttle at a distance of 100km using an M240 machine gun (muzzle velocity 850m/s), your bullets will arrive 117 seconds after you've fired. In that time, the Shuttle's OMS engines can move it 500 meters in any direction, far over its own length, so the only way you'll hit it is by pure chance.

    Meanwhile, the Shuttle returns fire with a self-guided AIM-54 "Phoenix" missile, which hits you about 10-15 seconds after launch.

  4. Re:Screw ships, go RKVs on Ask Slashdot: What Would Real Space Combat Look Like? · · Score: 1

    RKVs only work if you want to destroy your target. If you want to capture it, you need boots on the ground, and that means ships.

  5. Re:Ah, central planning. on Aderall Or Nothing: Anatomy of the Great Amphetamine Drought · · Score: 1

    I don't know how we ever made it to the 21st century without ADHD drugs.

    Prior to about the 1970s, adults with ADHD would typically self-medicate (almost any stimulant, including caffeine, will have a therapeutic effect; amphetamines just happen to work better than most) and children would simply get a reputation for being troublemakers or poor students.

  6. Re:I agree on his point about the room. on Pink Floyd Engineer Alan Parsons Rips Audiophiles, YouTube and Jonas Brothers · · Score: 1

    If they were spending it on gold-plated teak bathtubs or whatever, they wouldn't be making the signal-to-noise ratio of audio equipment reviews worse. As is, it's nearly impossible to find good information about audio hardware, because there's always the suspicion that the review you just found was from an audiophile basing their judgement on the price tag or advertising hype rather than on the sound quality.

  7. Re:Oh, hey on Super Bowl Bust: Feds Grab 307 NFL Websites; $4.8M · · Score: 1

    Shouldn't they be, I dunno, doing Immigration and Customs Enforcement?

    What do you think "Customs" is? The "customs" part of their name comes from their job of regulating the import of goods into the country; the term comes from import taxes being part of the "customary revenue" of the English King, and thus not subject to Parliamentary approval.

  8. Re:And in the winter... on Aussies Could Use Elephants To Fight Invasive Species · · Score: 1

    The fire warning signs read something like (This is not a joke) Normal, High, Dangerous, Extremely dangerous, catastrophic. I almost feel it is appropriate to have them add "We're all gonna die" or "save the children" in case some people don't understand the point.

    A wonderful tree, eucalyptus. Here in the western US, fires are common enough that trees produce seeds that don't sprout until they've reached a certain temperature (implying a fire hot enough to clear room for the seedlings to grow). Eucalyptus goes one better, by actively working to start those fires.

  9. Re:prizes? I just want to see the competition on Pentagon: 30,000 Pound Bomb Too Small · · Score: 1

    The F4 Phantom in that video is essentially some thin layers of sheet metal wrapped around a whole lot of air, so it's not surprising that it splashes when it hits a concrete wall. In contrast, a deep-penetration bomb is a solid mass of steel with a small bursting charge towards the back.

  10. Re:Hrrm on Exploits Emerge For Linux Privilege Escalation Flaw · · Score: 2

    Have you vetted crt1.o for correctness?

  11. Re:Tea. on Pirate Bay To Offer Physical Item Downloads · · Score: 3, Funny

    And you'll get a cupful of liquid that is almost, but not quite, entirely unlike tea.

  12. Re:Wow... on Pirate Bay To Offer Physical Item Downloads · · Score: 1

    Not if they were never published. Trade secrets can stay that way forever. I forget what the law says about leaked trade secrets, though.

    Trade secrets only stay secret until someone else figures them out. Trade secret law only limits what techniques can be used to get those secrets: reverse engineering and independent discovery are okay, while industrial espionage is not. Since there are plenty of Model Ts out in the wild, it's perfectly okay to measure one and create a set of blueprints from it.

  13. Re:Sounds awesome! on Town Turns Off the Lights To See the Stars · · Score: 1

    High altitudes are also good. I've found the best stargazing to be in the high desert of Utah: no moisture, no city lights, and you're above a good quarter of the atmosphere.

  14. Re:Prefab home... on Printing a Home: The Case For Contour Crafting · · Score: 2

    Headroom is a bit of a problem with shipping-container architecture. At the very least, you'd need to use 9-foot-6 high-cube containers rather than 8-foot-6 standard containers. The standard eight-foot width is also awkward: it's too wide for a hallway, while a standard room is ten feet wide. If you offset the walls so that a room takes up all of one container and part of another, you'd need to stiffen the roof or lose the ability to stack containers.

  15. Re:I'm not changing to IPv6 on a specific date... on June 6 Is World IPv6 Day 2012: This Time For Keeps · · Score: 1

    My guess is comcast & co really want this because they want to try and bill customers based on number of machines.

    They can do that already. By monitoring the source ports, sequence numbers and similar information coming out of a NAT box, you can get a very good idea of how many computers are behind that box.

  16. Re:careful what you wish for on Are Programmers Ruining the Design of eBooks? · · Score: 1

    Javascripts is coming.

    Javascript in an ebook? Somebody needs to be shot. Repeatedly.

  17. Re:wrong comps on Kodak Failing, But Camera Phones Not To Blame · · Score: 1

    The sensor works just fine at -30C. It's the other bits (say, the lubrication of the shutter mechanism, or the batteries) that don't. There's also the matter of technical and warranty support -- it's cheaper to say "we don't support the use of this camera in sub-freezing temperatures" than it is to design the camera to deal with condensation, non-lubricating lubricants, under-powered batteries, and the other problems you encounter at low temperatures.

    The batteries in particular are a problem. Photographers working in low temperatures usually carry two or three sets of batteries: one set cooling down in the camera, the others being warmed back up by body heat, and the batteries get changed every 15-30 minutes depending on how cold it is.

  18. Re:Turn signals are a good thing on Ford System Will Warn, Correct Lane-Drifting Drivers · · Score: 1

    "Some emergency situations" occur how often?

    At least fifteen times in the past seven years. My car's got two dents from other drivers changing lanes without looking, there have been three other times when I spotted the other vehicle before impact, my daily commute goes past a blind corner where drivers often stop with the front of their vehicle sticking a few feet out into cross traffic, and I had to swerve to avoid a buffalo once. This doesn't count the time the three-year-old ran out into the road in front of me (it was on a road with no lane markings), the times I've braked for deer and other small animals (rule of thumb: don't swerve if you can see the road over its back), or the sidewalk bicyclist who lost control and fell into the street behind me (the car following me was the one that had to make an unsignaled lane change).

    This also doesn't count driving on snowy roads, where it's more important to follow the ruts (where the good traction is) than it is to follow the lane markers.

  19. Re:Implement drone boats on Tensions Over Hormuz Raise Ugly Possibilities For War · · Score: 1

    Let's say the only America naval power in the area is a carrier, a destroyer, a crusier, and a couple of patrol boats.

    Except it won't be. Assuming the significant element in your list is the carrier, it'll be supported by an entire carrier battle group: one to two cruisers, two to four destroyers, and assorted auxiliaries. It'll also be parked several hundred miles offshore.

    If this is after the start of hostilities, the battle group commander will have the authority to initiate action against the attacking boats as soon as they're spotted (probably around 200-300 miles out), and in the four to six hours it takes the boats to close to within firing range (over-the-horizon attacks only work if you've got something - a submarine or an airplane - to act as a spotter), he'll be able to launch multiple fifty-aircraft sorties against them, as well as a couple hundred anti-ship or cruise missiles.

    Of course, if all the ships in your list are significant, the US will have even more ships: a cruiser battle group and a destroyer squadron to support the carrier battle group. It's something most people don't realize: large ships never deploy alone. They're always part of a formation.

  20. Re:Suicide boats is not Iran's primary weapon on Tensions Over Hormuz Raise Ugly Possibilities For War · · Score: 1

    The USS Stark is not a supercarrier but a missile frigate. I think a carrier is more vulnerable to missile strikes, due to the quantities of fuel and ammunition aboard (plus the fact these are often partly exposed such as when fueling aircraft on the deck), than a missile frigate (which also has the role of taking hits so that higher value ships don't have to).

    For anybody else's carriers, you might have a point, but the United States has almost a century of experience in operating carriers. Experience from the carrier battles of World War II (three out of the four Japanese carriers sunk at Midway were destroyed by bomb hits on ready ammunition), and most importantly from a number of accidental fires in the 1960s (see the USS Forrestal fire), have resulted in people figuring out how to handle those vulnerabilities.

  21. Re:Where's the OCR? on Malicious QR Code Use On the Rise · · Score: 2

    QR codes have the benefits of a higher information density and significant error checking/correction ability. MICR has an error rate of 1 per 100,000 characters, which works out to about one error per thousand URLs scanned. QR codes have an error rate of essentially zero: the ECC information means that when a scan error occurs, it either gets corrected or reported.

  22. Re:incredible on Attack Tool Released For WPS Setup Flaw · · Score: 1

    The calculations involved in a WPS conversation are non-trivial, so the cheap CPU in the typical router inherently rate-limits you to about 30 guesses a minute. If WPS had been correctly implemented, that works out to an average brute-forcing time of three years, and a worst-case time of around six years.

  23. Re:Priorities on Microsoft Issuing Unusual Out-of-Band Security Update · · Score: 1

    You XOR the input, not the output.

  24. Re:I for one on How Doctors Die · · Score: 1

    Saving your ass is easy; saving your mind is not.

    If you're willing to spend the money, modern medicine is able to maintain physical homeostasis almost indefinitely: almost all failing organs can be replaced by machines or drugs, so your body can be kept "alive" until your immune system fails and you rot from the inside out. The brain is one organ that can't be replaced, but it's also not one essential for survival. No-expense-spared treatment may end up leaving you as a permanently comatose body for decades, with no hope of recovering consciousness.

    Is this really something you want to do?

  25. Re:How do you determine healthy food? on IBM Granted Your-Paychecks-Are-What-You-Eat Patent · · Score: 1

    For instance you would think if you burned 2000 calories a day that a diet of 800 calories a day would make you continually burn off weight you might be right, in the short term. So why do some people that are overweight and have been on a continual 1000 calorie-a-day diet tend to stay overweight and do not lose anymore weight? It is called "Starvation Mode". This is when the body starts using the calories it gets more efficiently.

    It's not so much using the calories "efficiently" as it is using them "conservatively": "starvation mode" sees the immune system depressed, damage repair restricted to the minimum needed for survival (eg. bleeding is stopped, but wounds take a very long time to heal), the reproductive system shut down, and so on. Any calorie expenditure not needed for immediate survival is deferred.

    A side effect of this is that once you start eating enough once again, you'll see massive weight gain: your body doesn't come out of starvation mode immediately, and instead diverts the extra calories into building up your fat reserves. Going from an 800 calorie a day diet to a 2000 calorie a day diet can result in gaining three pounds a week or more.