Slashdot Mirror


User: Zorpheus

Zorpheus's activity in the archive.

Stories
0
Comments
678
First seen
Last seen
Profile
(view on slashdot.org)

Comments · 678

  1. And this is news? on Chemical Evidence Shows the Nazis Weren't At All Close To Having the Bomb · · Score: 1

    I thought this is clear since 1945. Germany never came close to obtaining a critical mass of fissible material.

  2. Re:Evidence of the Great Filter? on Advanced Civilizations Probably Don't Exist In Our Galactic Neighborhood · · Score: 1

    They only tested for really advanced civilisations, that are harnessing energy on a galactic scale. A civilisation building a Dyson Sphere is only Type 2 since it only harvests the energy of a whole star. Maybe these things are just impossible, or no civilisation sees a reason to do this.

  3. Re:Perpetual energy machine on Saturn's Moon Enceladus Has Global Subsurface Ocean · · Score: 1

    What happened with our moon is that its rotation got tidally locked and that its orbit became larger. When all orbits just get large no motion will stop though.

  4. It is not scientific to define the result before on NASA's Ten-Year Mission To Study All the Ways the Arctic Is Doomed · · Score: 1

    The project should be aimed at understanding the Arctic and how it changes. It should not only look for possible problems, but also how the Arctic will adapt and cope with it. By setting the vulnerabilities as a topic this research is defined to be one-sided.

  5. Re:not fucking close on Mars One CEO Insists, Our Mars Colonization Plan Is Feasible · · Score: 1

    I don't think Biosphere 2 is a good model for a space trip. We need simplified engineered ecosystems that are optimized for food and oxygen production and low weight. Something more like the plant farms running on the ISS at the moment. It makes no sense to replicate Earth ecosystems.

  6. Re:Can the enemy actually shoot down the F35? on F-35 Might Be Outperformed By Fourth-Generation Fighters · · Score: 1

    There are lots of reports about radar technologies that can penetrate stealth, since years. All you need is a radar system that does not rely on its own sender. It can work with mobile tower signals, the new Eurofighter radar will work with TV station signals afaik. It also works with multiple planes flying in formation, detecting the radar reflection from the other plane's senders. The Serbian radar system just used a longer wavelength than usual, that was already enough to penetrate stealth of the F117. Upgrading older planes with stealth-penetrating radar is also much cheaper than building a fleet of stealth fighters.

  7. Re: Looking more and more likely all the time... on German Scientists Confirm NASA's Controversial EM Drive · · Score: 1

    Sorry ,that is rubbish. The cars don't move anymore due to friction, they would still move if it was the collision of spaceships for example. And impulse is not just a mathematical construct, it is an important quantity in physics. The conservation of impulse is used to make mechanical calculations. It gives additional constraints to the conservation of energy, and there is no other conserved entity that gives these contraints.

  8. Re: Looking more and more likely all the time... on German Scientists Confirm NASA's Controversial EM Drive · · Score: 1

    Yeah I should maybe read what the theory says about this at some point. Maybe someone else knows?

  9. Re: Looking more and more likely all the time... on German Scientists Confirm NASA's Controversial EM Drive · · Score: 1

    Ok. It violates the conservation of momentum in classical physics, since there are no virtual particles in this. And I think in quantum mechanics the impulse of virtual particles is going somewhere normally. If pairs of virtual antiparticles form the sum of their impulses is zero. Virtual photons can exchange an impulse between charged particles. They take up an impulse and give it to another particle, but I think impulse does not disappear or come out of nothing.

  10. Re: Looking more and more likely all the time... on German Scientists Confirm NASA's Controversial EM Drive · · Score: 1

    There are hints that it is actually a thermal effect. The drive is heating up, and the impulse seems to be measured after the drive is shut down, while it is still hot.
    I would suspect that it is the same effect as in Crookes radiometer. This should be easy to test though.

  11. Re: Looking more and more likely all the time... on German Scientists Confirm NASA's Controversial EM Drive · · Score: 1

    Huh? It violates the conservation of momentum, something that has never been violated before.

  12. Re:Windows without a SSD isn't worth it on Ask Slashdot: Are Post-Install Windows Slowdowns Inevitable? · · Score: 1

    I think the usual file defragmentation can make things actually worse, if your hard disc is mostly sorted by folders at least. It will spread out files over the disc that are in the same folder and will be accessed at the same time.

  13. Re:Windows without a SSD isn't worth it on Ask Slashdot: Are Post-Install Windows Slowdowns Inevitable? · · Score: 1

    If you don't want to buy SSDs you need to do proper defragmentation. Not with the Windows defrag, that does not do anything good.
    The problem with Windows itself for example is that all the system files get spread out all over the hard disc due to the updates. The ne files are copied in the next free space of the hard disc, which is different with each update. What you want is that all Windows system files are in one place, best at the beginning of the drive for fast access. Normal defrags don't do anything to fix that. They only defrag files, but leave the files spread out all over the disc.
    I am using O&O Defrag in Complete/Name mode. This places Windows at the beginning of the drive and sorts everything by folders. This way my computers with spinning discs are nearly as fast as the ones with SSD.

  14. Re: PDF link to PDF exploit on Security Researcher Drops 15 Vulnerabilities for Windows and Adobe Reader · · Score: 1

    How can you let your browser view pdfs by itself? It will open malicious pdfs automatically, adding a big security hole without much use.

  15. Why not just run "Internet" on a program on the local machine that can't access anything on the local machine?

    Isn't that how a browser is supposed to work?

  16. Re: What? on How SpaceX and the Quest For Mars Almost Sunk Tesla Motors · · Score: 1

    Don't know about US, but in Germany the sum of liabilities just had to be lower than the sum of the value of all assets. I it might happen that they don't have cash because they did not take credits to the maximum for whatever reasons.

  17. Re:It's not limited to the US on More Than 40% of US Honeybee Colonies Died In a 12-Month Period Ending In April · · Score: 2

    I believe that too. Parasites and disease evolve so that they don't kill their host, since they would die too then. But they weaken their hosts. The combination of several ones can be deadly due to this.
    Leprosy disappeared in Europe when some big Tuberculosis epidemics came. People with Leprosy got infected quickly and died. Does is make sense to blame their dead on just one of the two diseases?
    You can take any of the factors which are weakening bees away to solve the problem. Best would be to reduce all of them, but neonics are the only factor that can be reduced easily.

  18. Re:Exede on Closing This Summer: Verizon To Scoop Up AOL For $4.4 Billion · · Score: 1

    Doesn't that cost much more than $21 per month, especially with upload?

  19. Re:4th Dimension? on Dark Matter Is Even More of a Mystery Than Expected · · Score: 1

    To make it more confusing, could that 4th dimension be the time? Meaning that a galaxy feels gravity from itself in earlier times.
    Because of relativity this long-term gravitational effect has to move linearly with the objects through space, so it would kind of wobble with the galaxies when they moving relative to each other. When the galaxies collide the past gravitational effect would keep moving linearly.
    Objects of all sizes would have this effect. But since planets moves around stars and stars don't move straight for long either the gravity can not build up over a long time, as it can on the scale of galaxies.

  20. Re:4th Dimension? on Dark Matter Is Even More of a Mystery Than Expected · · Score: 1

    And the dark matter of 2 galaxies could be other galaxies in different universes. They would only collide if they are in the same universe, or "plane" in the 4th dimension.

  21. 4th Dimension? on Dark Matter Is Even More of a Mystery Than Expected · · Score: 1

    I was wondering if dark matter could be matter in a 4 (or more)-dimensional space, so instead of coordinates x,y,z it is w,x,y,z. Ordinary matter is at w=0, while dark matter has some distance to ordinary matter in this 4th dimension. Adding a 4th dimension to gravity formulas is straightforward. We would feel the gravity of such matter on distances comparable to the w value of this matter.
    If the dark matter's w value would become similar to ours it would suddenly appear in our 3-dimensional space. Since we never observed it the w value might be fixed. For example this could be galaxies in parallel universes. They would feel each others gravity and drag each other along with ech other, but otherwise they are invisible to each other.

  22. Re: RO not very expensive on How 'Virtual Water' Can Help Ease California's Drought · · Score: 1

    Thanks for the link. Though when I take these numbers I come to a price of 0.65 cents per gallon:
    Lets take the price of 4.8$=480 cent per HCF. 1HCF=748 Gallons. 480/748 = 0.65 cents per gallon. How do you come to these high numbers?

  23. Re:Panda, taking the "anti-" out of "anti-malware" on Panda Antivirus Flags Itself As Malware · · Score: 1

    Sabotage by a disgruntled employee maybe?

  24. Re:Tilting at Windmills on The Programmers Who Want To Get Rid of Software Estimates · · Score: 1

    When you give an estimate you give your boss something to plan with. He can get things prepared and plan what is done after you finish. It allows to use the time well, and it assures that it will be fixed, but is not done yet.
    I think it does not matter so much that you take a bit longer that way. He can make plans for the rest of the company with that estimate, so it allows everyone else to make better use of their time, and it brings things into order.
    At least that is what I think.

  25. Re:a little brighter on What Happens When Betelgeuse Explodes? · · Score: 1

    I think you are right, it must be the flux, not the light intensity. I think the light density of the quarter moon is not that much compared to e.g. Sirius, but of course the flux is considerably larger.
    But it is hard to imagine a star with the whole flux of the quarter moon, that must be an extremely bright tiny spot, maybe like a laser.