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  2. Hill equation (biochemistry) - Wikipedia

    en.wikipedia.org/wiki/Hill_equation_(biochemistry)

    Each curve corresponds to a different Hill coefficient, labeled to the curve's right. The vertical axis displays the proportion of the total number of receptors that have been bound by a ligand. The horizontal axis is the concentration of the ligand. As the Hill coefficient is increased, the saturation curve becomes steeper.

  3. Allan variance - Wikipedia

    en.wikipedia.org/wiki/Allan_variance

    However, this is formally incorrect, as the fractional frequency and average fractional frequency are two different functions. A measurement instrument able to produce frequency estimates with no dead-time will actually deliver a frequency-average time series, which only needs to be converted into average fractional frequency and may then be ...

  4. Saturated absorption spectroscopy - Wikipedia

    en.wikipedia.org/wiki/Saturated_absorption...

    Another counter-propagating weak beam is also sent through the atoms at the same frequency, known as the probe beam. The absorption of the probe beam is recorded on a photodiode for various frequencies of the beams. Although the two beams are at the same frequency, they address different atoms due to natural thermal motion.

  5. 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 ...

  6. Saturation - Wikipedia

    en.wikipedia.org/wiki/Saturation

    Saturation (genetic), the observed number of mutations relative to the maximum amount possible; Ocean saturation, more than 2.3 billion years ago: see "Great Oxygenation Event" Environmental saturation, environmental resistance to population growth: see "Logistic function" and "Carrying capacity"

  7. Rabi frequency - Wikipedia

    en.wikipedia.org/wiki/Rabi_frequency

    The Rabi frequency is a semiclassical concept since it treats the atom as an object with quantized energy levels and the electromagnetic field as a continuous wave. In the context of a nuclear magnetic resonance experiment, the Rabi frequency is the nutation frequency of a sample's net nuclear magnetization vector about a radio-frequency field.

  8. Instantaneous phase and frequency - Wikipedia

    en.wikipedia.org/wiki/Instantaneous_phase_and...

    Instantaneous phase and frequency are important concepts in signal processing that occur in the context of the representation and analysis of time-varying functions. [1] The instantaneous phase (also known as local phase or simply phase ) of a complex-valued function s ( t ), is the real-valued function:

  9. P50 (pressure) - Wikipedia

    en.wikipedia.org/wiki/P50_(pressure)

    The fractional saturation Y O2 of the myoglobin is what proportion of the total myoglobin concentration is made up of oxygen-bound myoglobin, which can be rearranged as the concentration of free oxygen over the sum of that concentration and the dissociation constant K. Since diatomic oxygen is a gas, its concentration in solution can be thought ...