Jump to content
SAU Community

Recommended Posts

  • Replies 62.7k
  • Created
  • Last Reply

Top Posters In This Topic

  • chaos

    7164

  • Ska

    5791

  • BelGarion

    3645

  • Nexus9

    3590

Top Posters In This Topic

ergo

This line of argument brings us to an interesting notion: that of the interaction boundary. Let us assume an observer and a system to be observed-any observer and any system. Between them, imagine a boundary, and call it an interaction boundary. This boundary is strictly mathematical; it has no necessary physical reality. In order for the observers to learn about the system, they must cause at least one quantum of "information" (energy, momentum, spin, or what-have-you) to pass from themselves through the boundary. The quantum of information is absorbed by the system (or it might be reflected back) and the system is thereby perturbed. Because it has undergone a perturbation, it causes another quantum of information to pass back through the boundary to the observer. The "observation" is the observer's subjective response to receiving this information. In a simple diagram, the situation looks like this:

arrow.GIF

O | S

arrowl.gif

where O and S represent the observer and the system, the vertical line represents the interaction boundary, and the arrows represent the information exchanged in the act of observation.

In this scheme, no observation can be made without first perturbing the system. The observation is never one of the system "at rest," but of the system perturbed. If sigma.GIF represents the state of the system before the perturbation and sigma.GIF ±curved.GIFsigma.GIFrepresents the state immediately after, then the observation approaches the ideal only if

curved.GIFsigma.GIF<< sigma.GIF.

If I is the information selected by the observer to send across the interaction boundary, then it is apparent that curved.GIFsigma.GIF must be a function of I: i.e.,

curved.GIFsigma.GIF= curved.GIFsigma.GIF(I).

Thus, the observation is affected by choices made by the observer, as quantum mechanics seems to teach. In the case of atomic and some molecular phenomena, the inequality

curved.GIFsigma.GIF<<sigma.GIF

does not hold; in fact curved.GIFsigma.GIFarrow.GIFsigma.GIF so that the perturbation is comparable in magnitude to the state itself. Because all information is exchanged in quanta (modern physics does not allow for the "smooth exchange" of arbitrarily small pieces of information), this situation necessarily gives rise to an inescapable uncertainty in such observations. The quantum theory takes this uncertainty into account as the Heisenberg Uncertainty Principle.

Uncertainty is not strictly a law of Nature, but is a result of natural laws that reveal a kind of granularity at certain levels of existence. Observers in modern physics truly become participants in their observation, whatever that observation might be.

ergo

This line of argument brings us to an interesting notion: that of the interaction boundary. Let us assume an observer and a system to be observed-any observer and any system. Between them, imagine a boundary, and call it an interaction boundary. This boundary is strictly mathematical; it has no necessary physical reality. In order for the observers to learn about the system, they must cause at least one quantum of "information" (energy, momentum, spin, or what-have-you) to pass from themselves through the boundary. The quantum of information is absorbed by the system (or it might be reflected back) and the system is thereby perturbed. Because it has undergone a perturbation, it causes another quantum of information to pass back through the boundary to the observer. The "observation" is the observer's subjective response to receiving this information. In a simple diagram, the situation looks like this:

arrow.GIF

O | S

arrowl.gif

where O and S represent the observer and the system, the vertical line represents the interaction boundary, and the arrows represent the information exchanged in the act of observation.

In this scheme, no observation can be made without first perturbing the system. The observation is never one of the system "at rest," but of the system perturbed. If sigma.GIF represents the state of the system before the perturbation and sigma.GIF ±curved.GIFsigma.GIFrepresents the state immediately after, then the observation approaches the ideal only if

curved.GIFsigma.GIF<< sigma.GIF.

If I is the information selected by the observer to send across the interaction boundary, then it is apparent that curved.GIFsigma.GIF must be a function of I: i.e.,

curved.GIFsigma.GIF= curved.GIFsigma.GIF(I).

Thus, the observation is affected by choices made by the observer, as quantum mechanics seems to teach. In the case of atomic and some molecular phenomena, the inequality

curved.GIFsigma.GIF<<sigma.GIF

does not hold; in fact curved.GIFsigma.GIFarrow.GIFsigma.GIF so that the perturbation is comparable in magnitude to the state itself. Because all information is exchanged in quanta (modern physics does not allow for the "smooth exchange" of arbitrarily small pieces of information), this situation necessarily gives rise to an inescapable uncertainty in such observations. The quantum theory takes this uncertainty into account as the Heisenberg Uncertainty Principle.

Uncertainty is not strictly a law of Nature, but is a result of natural laws that reveal a kind of granularity at certain levels of existence. Observers in modern physics truly become participants in their observation, whatever that observation might be.

:)

Chris - THE FARKING TREE MAKES A SOUND BECAUSE I SAID SO! HA! :)
Oh okay..... as long as you say so :rofl:

I guess empirical evidence is no longer an accepted form of scientific validation, as now all things are possible at the mere whim of Cyrus ...... and accordingly so..... raise the speed limits llama :)

Guest
This topic is now closed to further replies.



  • Similar Content

  • Latest Posts

    • Change the subframe bushes, transforms the car.
    • For something a little more serious, Davinci Resolve is about the best there is for free video editors. No expiration dates or watermarks, completely free.
    • Well, it's taken me until the last week of 2024 to actually do something on the Skyline but I consider it a good head start to 2025's efforts! I managed to justify (to myself anyway...) my purchase of the lift table. It made taking the rear subframe out a lot easier than it would have been without anyway! Everything is out and stripped down ready for a clean then powdercoating.  She's pretty grubby under there but pretty good condition for a 38 year old Japanese tin bucket. 12 years of zero street time have obviously helped that... I need to decide which of the factory suspension arms I will keep and replace so I only get what I'm keeping powdercoated.  Baby steps but it's a start!  
    • Turbo gods, some assistance and recommendations please I'm looking into a turbo kit for my 2.5 from MX5 Mania >>>>> https://mx5mania.com.au/products/copy-of-mx-5-nc-2-5-litre-engine-conversion-turbo-2005-2013 Power wise I would like about 200kw atw, and of course dose noises, apparently if you keep a stock 2.5 under around 200kwatw the engine and drivetrain will not hate life even when ragging on it a bit Max RPM on the 2.5 is around 6500rpm The turbo MX5 use is something around the disco potato size as  packaging room for the turbo is pretty limited, which will, I believe, give me my power goals I want and not have the turbo either under, or oversized, but the rear housing bit is confusing  It comes with either a 0.64 or 0.86 From my understanding, which so far is based off googling, so make of that what you will 0.64: spools faster = good Makes more EGT heat on boost = bad Less topend power than 0.86 = I'm only looking for 200 atw so that point may be mute????, I don't know, hence my questions  0.86: Spools a "little" slower = how much slower??? remembering 6500 is my max rpm Makes less EGT heat = good Makes a little more power up top = again, power goals is only around 200 Also, this is a street car, so there will not really be any long track sessions, in saying this I would want it so it was happy with at least 3 hot laps at Wakefield Park if the need arises  I already have a fancy pants triple pass radiator, and a oil cooler with thermostat will be getting installed as well Thanks for any information or recommendations you have 👍, and of course, the comments about me wasting money on drive in drive out modifications, or any other snide remarks about my manhood for owning a MX5 🤣    
    • Tape some wool onto the vent then take it for a drive I did this to my reverse cowl and was instantly unhappy, as anything over about 60kph would have the wool enter the engine bay, thus just adding underbonnet pressure and stooging my coolant stack, it did let alot of heat out when stationary though, which really didn't help once the car was moving, with the reverse cowl you could watch the coolant temps cheap up the faster you went on the hwy, I assume it would be alot worse doing track day speed With the vented bonnet (just after the radiator and about 1/3 up the bonnet) on my old R33 the wool on the leading edge sat at about a 45° angle as air poured out of it From looking where your vents are, and their size, I believe you should be fine at speed and air should be evacuated from the engine bay, I think it will be a night and day difference when stuck in traffic though for removing the trapped heat, and not sitting there cooking when parked up after driving around... #convection  Post wool tuft pics and data for science  This beastie is one nice and unique rig, enjoy
×
×
  • Create New...