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how detailed can a jbeam be

Discussion in 'Troubleshooting: Bugs, Questions and Support' started by TheRealPhil, May 17, 2014.

  1. SixSixSevenSeven

    SixSixSevenSeven
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    The speed of an electron in a wire is only about 1 metre per second, its just take the idea of a 1 mile long stick, if you move it 1cm then both ends of it move 1cm at the same time, swap the stick for a pipe full of tennis balls, pop 1 ball in at one end and 1 pops out of the other end. This pipe could be 2 miles long, the tennis ball you put in may only move at 2 metres per second, yet it doesnt take a full 1608 seconds for another ball to come out of the other end of the pipe.

    The capacitance of the wire would serve to increase signal propogation times though and this is a genuine limiting factor in modern computing.

    Actually the CAN bus used in a cars electrical system has speeds inversely proportional to the length of the wiring with the main limiting factor genuinely being that a longer set of wires has a higher capacitance and therefore has a tendency to resist the change in voltage to signal a high or low, small set of wires you can get away with a higher frequency but a longer set you need a rather low clock frequency. CAN buses use termination resistors, the value of the termination resistor can be tweaked to alter the capacitance issue slightly and the thickness of the wire also impacts it. But on a forum dedicated to a car game, CAN bus is the perfect example. 2 more examples are ethernet cables and USB too. Ever noticed that you can't buy a 10m USB cable without it being advertised as "active", normally the USB signal cannot cope with the capacitance of the wire at much more than 2 metres, longer cables usually have to have active control circuitry which converts the electrical signal into an optical one which is then converted back to electrical at the other end or similar. Ethernet data transfer rates are slower on longer cable runs, why? The communication frequency is being downclocked so that the wire can charge/discharge correctly before the network device next tries to read the voltage level from the cable. Lets say the device reads 1, then a zero is transmitted, the period before you read the wire again must be longer than the period it takes for the voltage to rise (in ethernet 0v = true, 2.5/2/1/0.5v = false depending on exact standard in use) else you'll end up reading another 1 instead of the correct value which is 0.

    That is the bigger limitation in current computers. The speed of light due to the tennis ball pipe analogy is not a limiting factor at all, but the fact that all electrical wiring acts as a capacitor is a limiting factor as the cable resists the changes in voltage we use to signify a binary 0 or 1 down the cable is a limiting factor. This is known as a parasitic element (actually its 1 of 3 parasitic elements with the others being resistance and inductance). This is the reason CPU designers are trying to shrink the lithography in use as a 20 nanometre wide transistor will have a lower parasitic capacitance than the 250nm transistors in use on the curiosity rover due to the smaller size (capacitance is somewhat proportional to size), as a bonus they can be more tightly packed together which means shorter "wires" between the transistors further decreasing capacitance, with a decrease in capacitance you can get away with a higher frequency for signalling.





    As for Q-Bits, that should be qubit which is a quantum bit which is 1 digit within a quantum computer. Quantum entanglement is the paired atom thing. Physicists have put quantum entanglement forwards as a faster than light communications method for intergalactic travel so yeah, it must be faster than light I guess :p I think this theory revolves around the fact our universe although we perceive as being in 3 dimensions has many more that are beyond our perception and that although we perceive these 2 atoms to be vast distances apart in the 3 dimension we perceive, they may not be in another dimension. I'm not a quantum physicist, find someone else to explain that.
     
  2. CProRacing

    CProRacing
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    A very interesting read this topic!

    Cheers
     
  3. logoster

    logoster
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    sadly, for now all we can do is dream about a computer able to run beamng at max settings with 1000+ of the most detailed jbeam possible at 60+ fps
     
  4. mtchll3

    mtchll3
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    entangled particles are only a theory with little to no prof of there existance, but quantum computing may run trinary(0,1,2) if im not mistaken, there has been quite alot of research into it lately
     
  5. SixSixSevenSeven

    SixSixSevenSeven
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    Qubits have theoretically infinite states, although the term you were after was ternary.

    Quantum entanglement, again I am not a physicist (certainly not quantum :p mechanics and electricity are far more interesting to me) but as far as I can tell from wikipedia is a demonstratable phenomenon.
     
  6. mtchll3

    mtchll3
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    ternary, good to know, i personally like the field of quantum theory, and new research is being released a fast rate, it can be hard to keep up
     
  7. Zappymouse

    Zappymouse
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    Jesus christ did I really mix up EMR and electricity?




    ...





    I'm just gonna leave.
     
  8. 14ramosr

    14ramosr
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    Dont leave bro! Ill miss you :c
     
  9. Zappymouse

    Zappymouse
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    lel u r a qt

    some homo
     
  10. 14ramosr

    14ramosr
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    He wants the D o.o ​(semi aroused)
     
  11. mtchll3

    mtchll3
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    Joined:
    Mar 31, 2014
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    294
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