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User: Charvak

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  1. Re:Remember though. . . on 100 Years of Special Relativity · · Score: 1

    I read many year ago a short SF story by Larry Niven. This story stated that it is possible to travel back in time if we rotate a massive cylinder. Is this related to frame dragging?

  2. Re:The best Star Trek movies were even numbered. on Star Trek XI In Two To Three Years. · · Score: 1

    in the treaty of algeron it was decided that federation will not develop cloaking technolgy.
    OMG!!!! what a loser to remember this?

  3. Full article here on Scientific American Gives Up · · Score: 1
  4. Re:Embryonic Stem Cells on US Stem Cells Contaminated · · Score: 1

    I assume they will take your DNA transplant in the female egg and then the resultant stem cell will match with you.

  5. Microsoft DCOM on Open Group Releases DCE 1.2.2 as Free Software · · Score: 0, Redundant

    Microsoft DCOM is based on DCE/RPC. Now we can easily port the DCOM technology to UNIX

  6. Unmanned mission to mars is OK on One Year on Mars · · Score: 0, Offtopic

    But I dont like the idea of manned mission. In my opinion we should first construct a self sustained permanent base on the moon. And with the lesson learnt from the mission then plan for the manned mar mission.

  7. Re:there is no measureable total weight loss on Space Station Crew Forced to Cut Calories · · Score: 1

    Holy Cow!!!

    For the sake of argument, I say that the ISS is in thermal equilbrium with the universe hence net energy exchange is zero. Therefore, my highly logical vulcan mind tell me that the ISS will not gain any mass. :)

    Your move.

  8. Re:there is no measureable total weight loss on Space Station Crew Forced to Cut Calories · · Score: 1

    No you are wrong.

    That is energy to energy conversion. one form of energy is converted to another form of energy.

    bond energy converted to heat. mass remains constant.

  9. Re:Years away on New Advances Bring Fusion Closer to Reality · · Score: 1

    Humans are inferior to turing machine. remember, turing machine requires infinite memory.

  10. Re:there is no measureable total weight loss on Space Station Crew Forced to Cut Calories · · Score: 1

    the mas loss due to e=mc^2 is zero. mass to energy conversion only happens in nuclear reaction not in chemical reaction. since food digestion is chemical reaction there will be no loss of mass.

  11. Re:Pronounced kwa-whar why not spelled kwa-whar? on Quaoar Showing Evidence of Volcanic Activity · · Score: 1

    In arabic and semitic language there are two similar sounding letter for sound K. When writing arabic word in english script Q is used to denote the guttural K.

  12. Re:Dont eat anything from holodeck on The Future of Holograms · · Score: 1

    Thats not how thing work in star trek universe. All things in holodeck goes away as soon as you step away from the holo emitter. The apple you see in the holodeck is not the actual physical object but the emitter is projecting a force field of the same shape size/texture/color of the apple. Thats the diffenece in replicator and holodeck.

  13. Re:Dont eat anything from holodeck on The Future of Holograms · · Score: 1

    Except that the apple will no longer exist as soon you switch off the holo emitter/projection/matrix. This has been documented in several episodes.

  14. Re:water is weird on Water Suddenly Becomes Mysterious · · Score: 1

    all of the weird properties can be explained by hydrogen bonding.

  15. Re:No.... on Titan's Smooth Surface Baffles Scientists · · Score: 1

    Then may I suggest Vacuum Diagrams by Stephen Baxter. This novel is a collection of related short stories.

  16. Re:Hmmm. on Tycho's Supernova · · Score: 1

    Given the fact that the accompaining planets are only 1% of the total mass of the star system, I belive that the planet will be moving along merrily with the star.

  17. Re:Does that mean on Boosting Your Brain With Batteries · · Score: 1

    The reason brain is so robust is because of its distributed nature. So what if a neuron is destroyed another neuron will take its place and perfrom the same function. People who have suffered stroke will in time recuperate because other part of the brain is takes over the functionality of the brain which was damaged in the stroke.

  18. Re:And it's easy to implement on 30th Anniversary of Pascal · · Score: 1

    The easiest compiler to write must be LISP. In my college it was given as an assignment. While writing a C compiler was a term project.

  19. The best explanation of relativity on Enter the Relativity Challenge · · Score: 3, Informative

    I found is in Relativity and FTL(faster than ligth) FAQ http://www.physicsguy.com/ftl/

    This explanation explain relativity in context with the faster than light travel. Needs elementary math and explains lucidly why the time dilation occurs. Highly recommened.

  20. Relax on Solar Minimum Coming Sooner Than Expected · · Score: 3, Informative

    It happens every 11 or so years. Nothing to panic

  21. Re:Unfortunately... on Harvard to Clone Human Embryos? · · Score: 1

    In the Brave New World, the embroys were given rating something like A+, A.
    These ratings decided what the embryo will become resulting in caste with brigher people becoming manager/leader/scientist and the stupid becoming labourer. Though not racist, this concept was very similar to racist where you have bunch of people given different status in the society because of their level of intelligence.

  22. Re:Wow I feel sad for the future on Bush, Kerry, and Nader Respond to Youth Voter Questions · · Score: 0, Offtopic

    Surely you jest. (By catholic you mean roman catholic). I am not a christian but I have heard that syrian catholic were before roman catholic.

  23. Re:This has always confused me on Motion of the Primordial Universe Revealed · · Score: 1

    You are getting me wrong. The clock actually slows down its not that it appears that the clock is slowing down. What the paragraph you quoted is saying that both the frame of reference are correct. IF I understand you correctly you are saying is that if this is the case then what happens when both Alice and Bob meet again. This is twin paradox and has been explained.

    Also, if I accept you reasoning then if Alice and Bob are moving toward each other the clock will go faster for Bob in Alice frame of refernece and viceversa.

    This is the paragraph I was mentioning...

    Now it is very easy for a newcomer to relativity to get mislead by this concept of frame of reference. The sticky phrase in the above explanation is "relative 'view' of things." You see, whenever I talk about when something occurs in some frame of reference, I do not necessarily mean what the observer in that frame would actually see with their eyes. This is because the observer only sees the event after the light from the event reaches him. To figure out when the event actually occurred for that observer, one must account for the "signal delay". For example, an observer may see an event today, but if the event occurred on some star ten light-years away (the distance light would travel in 10 years) in this observer's frame, then we must realize that the event actually occurred ten years ago in this observer's frame of reference (because then light from the event would just be reaching the observer today). I mention this because it is sometimes tempting for newcomers of relativity to conclude that its odd effects (like time dilation--which we will discuss later in this chapter) are only illusions created by the fact that light from an event may reach one observer before it reaches another. However, here I am clearly stating that when we talk about when an event occurs in a frame of reference, we are talking about when it actually occurred in that frame after all light signal delays are taken into account.


    According to this paragraph, the time dilation will be actual time dilation not just the observation because light is reaching after some interval.

    I had lots of difficulty understanding the relativity and after reading this article, many things become clearer.

  24. Re:fork() is a cheap operation on unix on Solaris Systems Programming · · Score: 1

    Since I dont know about the clone(), I cant comment but all unix os have a vfork which does not create a new page table. The idea is that user will immediately do the exec after the vfork.
    Is clone() the clone of vfork in linux ? (Pun intended)

  25. Re:fork() is a cheap operation on unix on Solaris Systems Programming · · Score: 1

    yeah but in fork you still have to create and copy the page table. In thread you dont. Also context switching is cheaper for threads than process.