Recent content by ynot

  1. Y

    Undergrad How to remove Ethanol from Gasoline?

    Maybe this question should be on Chemistry Forum. It's funny that someone asks a hypothetical question about removing alcohol from gasoline on a science-related forum, and somebody just tells him to go buy non-alcohol-containing gasoline. It would be like someone asking someone on Juggling Forum...
  2. Y

    Graduate Why does an Accelerating Charge Radiate - Solved or Unsolved?

    I think Antiphon hit upon it. If you drop an electron in a gravitational field, and it speeds by you, you should feel radiation from the accelerating charge. Conversely, if you are accelerating past an electron, you should also experience radiation, being that in classical physics...
  3. Y

    Undergrad Space station mathematics question

    Get Rendezvous with Rama by Arthur C. Clarke. I think he covered the physics quite well, with changes in apparent gravity caused by the rotation of a spaceship almost exactly like your story.
  4. Y

    Differential Signaling for High-Speed Digital Transmission by Jason O

    Twisted-pair wire is a excellent way to do it. You can make a differential driver yourself by using an inverter for the second line. When one switches up, the other one switches down, and vice-versa. The noise immunity comes from having a good differential receiver. For 6 inches of wire in...
  5. Y

    Could Intelligent Memory Enable Electronics to Obsolete Humans?

    There are only two things that I can think of that one can argue to make it "fundamental". 1. Mathematically - that was Leon Chua's first idea that it was necessary. It was the fourth leg, based on the relationships of the ratios of fluxes, charges, etc. 2. It will explain hysteresis that...
  6. Y

    Could Intelligent Memory Enable Electronics to Obsolete Humans?

    The memristor equation almost looks like what we signaling guys call the small signal, or AC resistance, as opposed to the DC, or large signal resistance. A nonlinear resistor (like a FET) that is voltage sensitive, for instance, can have different resistance values so that: R(v) = V/I...
  7. Y

    Undergrad Energy from the Vacuum? Real or BS?

    The ZPE guys remind me of when I was 12 years old, and thought that putting a generator on the front wheel of a bicycle and a motor on the rear wheel would allow me to travel, if not forever, but further than without them. It's fun in a childish way to think about this stuff, but then you find...
  8. Y

    Is Avoiding the Central Issue Dishonest? The Truth About Cold Fusion's Return

    The story seems slanted toward overt optimism. I don't personally take the word of Electrical Engineers on nuclear physics. I don't mind that someone is looking at it, but we've been through this before. We need proof than anecdotes.
  9. Y

    Why Are These Functions Time Variant and Non-Causal?

    Here are my guesses: They're time variant because they vary with the time variable "t". The first one is non-causal because because it uses -t (negative time), so the function could have a value before time 0, usually the definition of when an initial event happens. The output could...