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User: robbak

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  1. Re:what does auto-termination mean? on Anomaly Triggers Self-Destruct For SpaceX Falcon 9 Test Flight · · Score: 4, Interesting

    That's pretty much it. The on-board computers detected that the rockets attitude or location was out of limits, so it triggered some explosive detcord fixed against the fuel and lox tanks, tearing them open, so that the rocket safely disintegrates.

    I notice from the video that the destruction is done in a way that doesn't mix the LOX and fuel together - you can see the Cold Lox falling away and the ignited cloud of burning RP1 floating higher. Really nice bit of design I hadn't thought of.

  2. Re:Questions like this really reveal the definitio on Can We Call Pluto and Charon a 'Binary Planet' Yet? · · Score: 1

    Barycenter not closer to either planet than a chosen percentage of the distance between their centers would be better.

  3. Re:Questions like this really reveal the definitio on Can We Call Pluto and Charon a 'Binary Planet' Yet? · · Score: 1

    Again, I would have to be convinced that a group containing more than two objects with sizes within an order of magnitude of each other would be stable. Myself, I can't see it. Two large moons would push each other into chaotic orbits which would, sooner rather than later, lead to either a collision or an ejection.

    The only way I can see a system with two large moons is with a planet that is completely dominant, such as Saturn or Jupiter and it's moons. (I'd argue, for instance, that Earth could not have held on to two moons.)

    But these questions can really only be answered when we have more binary-planet candidates to categorize.

  4. Questions like this really reveal the definitions. on Can We Call Pluto and Charon a 'Binary Planet' Yet? · · Score: 1

    The answer is simple - that Lagrange point is not stable, so the moon would not remain there. Each moon would be pulled from that point by the other's gravity, until they either collide or one or both items are thrown from their orbits.

    So as a planet cannot have two moons that orbit opposite each other, the concept of a binary planet with a definition based on the location of its barycenter is valid. But we'd first want to see one - Pluto/Charon is a poor example, as Pluto is considerably larger and heavier than Charon, so 'Planet/moon system' defines it better. If we start to find real binary planet systems outside of our solar system and stat characterizing them, then we will be able to know what sorts of systems happen and how they form, and maybe then we will find that Pluto/Charon belongs as an outlier there. But that's for a future time.

  5. Patent is for use without music? on Bose Sues New Apple Acquisition Beats Over Patent Violations · · Score: 3, Informative

    The thing that commenters over at Ars haven't picked up on - this patent is only infringed if the customer wears the headphones without playing music. Noise cancellation with added music - OK, there's prior art for that. Turn the music off - it becomes patentable technology.

    The claim states that Bose is on the hook because their documentation states that you can use the headphones without music for noise cancellation only, which induces their customers to infringe Bose's patents.

    How is that legit? How can not adding music create a patentable technology?

  6. Re:Hmm, an immediate hostile reaction, you say? on Cable Companies: We're Afraid Netflix Will Demand Payment From ISPs · · Score: 1

    Not at all!

    But as it currently stands, Comcast's customers are paying Comcast to delver the data from Netflix at up to the speed the customer is paying for. For Comcast to help fund Netflix' expansion so that they could better support Comcast's customers' demands might, just "might," be reasonable. For Comcast to hold Netflix to ransom is certainly not.

  7. Hmm, an immediate hostile reaction, you say? on Cable Companies: We're Afraid Netflix Will Demand Payment From ISPs · · Score: 1

    "If a broadband provider were to {snip} block or degrade access to its site if it refused to pay a significant fee, such a strategy almost certainly would be self-defeating, in light of the immediately hostile reaction of consumers to such conduct."

    You mean the hostile reaction you are getting right now as you do exactly that? Like how every one of your customers that has any other option dumps you in a heartbeat?

    Yes, if anyone should be paying anyone, it is Verizon/Comcast that should be paying Netflix, as Netflix is providing the content that Veriz/cast sell to their subscribers.

  8. So, how does this go? on Aereo Embraces Ruling, Tries To Re-Classify Itself As Cable Company · · Score: 4, Insightful

    Companies: Hey Courts, Aero is a cable company!
    Aero: We really aren't.
    Courts: I agree with the Companies. Aero is a cable company.
    Aero: Sigh, I guess we'll have to become a cable company then.
    Companies: I Object! Aero isn't a cable company!

  9. I can see how you could think it dangerous. on The View From Inside A Fireworks Show · · Score: 1

    But I can also apply physics and see how the danger is very small.

    The biggest point is that the sky is big and both the shells and the drone are small. The chance of the two coming into contact is negligible. The risk of anything bad happening if that happens is also very small - the only thing I can see happening is if a rotor happens to cut the shell's fuse. The shell is too heavy for a fragile drone to have much effect on it.

  10. What he wants versus what is the reality. on The View From Inside A Fireworks Show · · Score: 1

    The drone genie is out of the bottle. This is the world we not live in - where the possibility of a cheap RC craft being in a particular airspace has to be taken into account.

  11. Heavy solid shell, light fragile drone. on The View From Inside A Fireworks Show · · Score: 3, Insightful

    The shell smashes the drone into tiny bits of confetti, and continues on it's merry way. Or, more likely the shell snaps off a rotor arm without noticing.

    They will not bounce off each other like billiard balls. That's what happens when you have a collision between equal mass objects in which kinetic energy is conserved. This would be a collision between different mass objects where energy is lost to work - destroying the drone. The one with the most momentum wins.

  12. Re:Illegal and Dangerous? on The View From Inside A Fireworks Show · · Score: 4, Insightful

    Professional fireworks are mortar-fired shells, not rockets that can go off-course if nudged. So if a shell hit the drone on the way up, it would smash straight through it and keep on going. There is not enough mass in a drone, and a drone is not solid enough, to deflect the solid mass of a firework shell travelling at speed. It might not quite reach the same height by a few meters, or might end up a couple of feet off target, but neither of these things would matter.

    And if the drone is up at altitude where the shells explode, then there is even less speed involved. The shell has reached it's height - so what if it taps a drone before detonating.

    There is also whole lot of sky, and both shells and drones are small. The chance of the two coming together is practically nil.

    Amazing pictures captured with zero risk. Images from a drone up there amongst it all should be a permanent feature of firework presentations.

  13. What with all the other debris? on The View From Inside A Fireworks Show · · Score: 5, Interesting

    The area under a fireworks show already gets peppered with the remains of all the exploded shells. A little added debris from a drone struck by part of the fireworks would make no difference. They always make sure that the fallout zone is in a safe area.

    Add to that that the shells are mortar-fired, not rockets, and the risk of this is practically nil. Way less than the risks of just using and handling all that explosive.

    Every professional fireworks show - at least, all those that are televised - should include shots from a drone up there amongst it all. The spectacular pictures are well worth the tiny risk.

  14. And if slower than it's orbital velocity... on Dump World's Nuclear Waste In Australia, Says Ex-PM Hawke · · Score: 1

    That just means that it is in an elliptical orbit, out near its apogee. That orbit will pull it closer, speeding it up, until it reaches its perigee, which will throw it back out to its apogee. Around and around we go, unless the perigee is within the atmosphere.

  15. Yes, it did. on Dump World's Nuclear Waste In Australia, Says Ex-PM Hawke · · Score: 1

    Mind you, it was able to drop most of it by running into the top of the earth's atmosphere. The space shuttle orbits within the outer reaches of earth's atmosphere - the sun's atmosphere is a very long way away.

  16. De-orbit means 'remove it from orbit' on Dump World's Nuclear Waste In Australia, Says Ex-PM Hawke · · Score: 2

    In order to take something from earth orbit and get it to the sun, you have to take it from earth's speed of 30 km/sec and slow it down to zero. Only when will it fall into the sun. If you leave any of that orbital speed on that object, then it will miss the sun, swing around it like a comet, and head back to where it came from. You could perhaps use a fly-by of Venus and/or Mercury to help you with that, but it's still a near-impossible thing to do. This is what is meant here by de-orbit.

  17. 'Australia' doesn't want to take it. on Dump World's Nuclear Waste In Australia, Says Ex-PM Hawke · · Score: 1

    ... although it undoubtedly would be a good move. Good for Australia, although a better move would not involve transporting the stuff halfway across the planet.

    This is one ex-politician speaking - and speaking more sense than he ever did while in office.

    It's a myth that we don't know what to do about nuclear waste - we know exactly what to do with it - cast it in ceramics, drill a deep hole into old, stable rock, place it in the hole, and seal it. Oh, after reprocessing and using fast breeder reactors to reuse most of it. All we have to do is just do it - but it is too easy to raise pseudo-environmental and NIMBY anger to prevent it actually happening.

  18. For mobile? That is BETA's worst failure on Slashdot Tries Something New; Audience Responds! · · Score: 1

    I seem to be locked into beta on my phone, and it just simply doesn't work. 3 comments down, and the comments are single-word lines, and a few more nested comments down, even that breaks. Even though I visit classic.slashdot.org, i end up at beta.

    Look, someone with black-hat skills, track down their dev environment and rm -r it for us, please?

  19. No, tides at Bowen are much lower. on Australia OKs Dumping Dredge Waste In Barrier Reef · · Score: 2

    You've got your location wrong. The tidal range at Abbot Point is less than 4 meters.

    http://www.bom.gov.au/oceanogr...

  20. Re:Sign the petition on Australia OKs Dumping Dredge Waste In Barrier Reef · · Score: 1

    So you want them to dump the spoil closer to the reef???? The great barrier reef is about 75 km off the coast at Bowen, where this development is happening, and you'd need to travel twice that to be outside the boundaries of the marine park.

  21. They are taking it to a 'safe dumping zone'. on Australia OKs Dumping Dredge Waste In Barrier Reef · · Score: 3, Insightful

    They have chosen a safe dumping zone where the movement of silt won't cause problems. But the entire east coast of Queensland, however, is the marine park, so all the safe dumping zones are inside the 'park'. So that means that GBRMPA has to check the details and make sure that what the engineers have worked out is a safe dumping zone is actually one, and that the currents won't take large quantities of fine silt onto reefs. They have done so, worked out that it is, and the world moves on.

    Now whether anyone should be digging up coal and shipping it to places where it will be burnt is another matter. But the placement of the dredge spoil is simple engineering.

  22. Quickstarter still exists on James Gosling Grades Oracle's Handling of Sun's Tech · · Score: 3, Informative

    It is still there as an optional item in the installer, not selected by default (because that is the way it should be).

  23. Re:Maybe the Patent Office will notice on JPMorgan Files Patent Application On 'Bitcoin Killer' · · Score: 1

    Applying for a patent is a negotiation process in which you throw out a bunch of claims looking to get the best deal you can. You start with Claim 1 being a claim on the sidereal universe and all it contains and work your way down to more specific stuff. Depending on the skill of those writing the patent you will get more or less of the invention you actually wanted.

    As you can see in the application they have already dropped the first 154 claims in the original application.

    And that is the main problem. When an inventor files a patent, it should be totally specific. If that patent is rejected, they should have two options: Argue that the patent as it stands is valid, involving the courts if necessary, or toss it out, and create a new, correct patent with a new effective date.

    And if the way a patent is written could be read to cover some prior art, either before or after it is approved, then the patent is wrong and should be tossed, entirely, unless that prior art was explicitly listed in the 'prior art' section.

    So this patent application should be the recipient of a junior-clerk's REJECTED stamp, because it doesn't explicitly list the Satoshi paper in it's applicable prior art section.

  24. Of course, they way it should be used: on Google Wants To Write Your Social Media Responses For You · · Score: 2

    'If you were going to say one of these, STOP! you are being boring! Think of something original to say, or shut up!"

  25. Petrodollars on China's State Press Calls For 'Building a De-Americanized World' · · Score: 4, Interesting

    The US has gone to war a number of times (it is claimed) to prevent countries trading oil in currencies other than the Dollar. Some of those claims might border on conspiracy theories, but it remains that the tactics to keep oil trading based on the U.S. Dollar look remarkably like 'force'.

    Etymology note: Petroleum is latin for 'Rock Oil' (Petra, rock + Oleum, oil, from the Latin for Olive.). When we created that abbreviation, Petrodollars, dollars for oil, all that was left of the oil was the 'o'. The word looks more like 'Rock 'o Dollars, doesn't it?