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  2. Hartley oscillator - Wikipedia

    en.wikipedia.org/wiki/Hartley_oscillator

    Hartley oscillator using a common-drain n-channel JFET instead of a tube.. The Hartley oscillator is distinguished by a tank circuit consisting of two series-connected coils (or, often, a tapped coil) in parallel with a capacitor, with an amplifier between the relatively high impedance across the entire LC tank and the relatively low voltage/high current point between the coils.

  3. Oscillation - Wikipedia

    en.wikipedia.org/wiki/Oscillation

    Oscillation is the repetitive or periodic variation, typically in time, of some measure about a central value (often a point of equilibrium) or between two or more different states. Familiar examples of oscillation include a swinging pendulum and alternating current. Oscillations can be used in physics to approximate complex interactions, such ...

  4. Duffing equation - Wikipedia

    en.wikipedia.org/wiki/Duffing_equation

    The parameters in the above equation are: controls the amount of damping,; controls the linear stiffness,; controls the amount of non-linearity in the restoring force; if =, the Duffing equation describes a damped and driven simple harmonic oscillator,

  5. Harmonic oscillator - Wikipedia

    en.wikipedia.org/wiki/Harmonic_oscillator

    A simple harmonic oscillator is an oscillator that is neither driven nor damped.It consists of a mass m, which experiences a single force F, which pulls the mass in the direction of the point x = 0 and depends only on the position x of the mass and a constant k.

  6. Peierls transition - Wikipedia

    en.wikipedia.org/wiki/Peierls_transition

    The earliest written record of the Peierls transition was presented at the 1954 École de physique des Houches.These lecture notes (shown below) contain Rudolf Peierls' handwritten equations and figures, and can be viewed [3] in the library of the Institut Laue–Langevin, in Grenoble, France.

  7. Q factor - Wikipedia

    en.wikipedia.org/wiki/Q_factor

    The Q factor is a parameter that describes the resonance behavior of an underdamped harmonic oscillator (resonator). Sinusoidally driven resonators having higher Q factors resonate with greater amplitudes (at the resonant frequency) but have a smaller range of frequencies around that frequency for which they resonate; the range of frequencies for which the oscillator resonates is called the ...

  8. ReMarkable Tablet review: Can this tablet replace all your ...

    www.aol.com/lifestyle/remarkable-tablet-2-review...

    Digital note-taking offers flexibility and convenience that traditional handwritten notes can’t match. With seemingly unlimited space, you’ll never run out of room to capture ideas, lists, or ...

  9. Oscillation theory - Wikipedia

    en.wikipedia.org/wiki/Oscillation_theory

    Comparison and Oscillation Theory of Linear Differential Equations. Elsevier. ISBN 978-1-4832-6667-1. Teschl, G. (2012). Ordinary Differential Equations and Dynamical Systems. Providence: American Mathematical Society. ISBN 978-0-8218-8328-0. Weidmann, J. (1987). Spectral Theory of Ordinary Differential Operators. Lecture Notes in Mathematics ...