modulation

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modulation

 [mod″u-la´shun]
the normal capacity of cell adaptability to its environment.
antigenic modulation the alteration of antigenic determinants in a living cell surface membrane following interaction with antibody.

mod·u·la·tion

(mod'yū-lā'shŭn),
1. The functional and morphologic fluctuation of cells in response to changing environmental conditions.
2. Systematic variation in a characteristic (for example, frequency, amplitude) of a sustained oscillation to code additional information.
3. A change in the kinetics of an enzyme or metabolic pathway.
4. The regulation of the rate of translation of mRNA by a modulating codon.
[L. modulor, to measure off properly]

modulation

The regulation of the rate at which a specific gene is transcribed.

mod·u·la·tion

(mod'yŭ-lā'shŭn)
1. The functional and morphologic fluctuation of cells in response to changing environmental conditions.
2. Systematic variation in a characteristic (e.g., frequency, amplitude) of a sustained oscillation to code additional information.
3. A change in the kinetics of an enzyme or metabolic pathway.
4. The regulation of the rate of translation of mRNA by a modulating codon.
5. Change in parameters of electrotherapy (e.g., frequency, amplitude).
[L. modulor, to measure off properly]
References in periodicals archive ?
where k is the number of relay nodes with correct demodulation and [C.sup.k.sub.M] = M!/[k!(M - k)!] is the combination expression in mathematics.
7: The RF spectrum for the in-phase component for 1/32 CP after OFDM demodulation.
Compared to the previous scheme adopting a combination with the wavelength shift and intensity modulation [12, 13], it can greatly reduce the complexity of sensing demodulation.
Finally, we diagnose gear fault by combining the findings from sideband analysis in Fourier spectrum, and amplitude and frequency demodulation analyses.
In our previous work [16], the approach for iterative joint demodulation and decoding by BP was presented based on the graphical model by exploring the flooding schedule.
In this section, quadrature demodulation of an AM radio signal superimposed with HV noise is described by using Fig.
In the present section the optical metrology basis, the harmony search optimization model, and the frequency guided sequential demodulation process are shown.
Additional features include automatic measurements of Channel Power (CP), Adjacent Channel Power Ratio (ACPR) and Occupied Bandwidth (OBW), and waveform demodulation. The new PSA Series 5 Analyzers supplement the widely adopted PSA Series 2 which is available in 1.3GHz and 2.7GHz versions.
Their incoherent demodulation approach apparently improved the efficiency of SCA on proximity card but there is no major enhancement in the measurement setup; it is still necessary to use additional complex hardware analogue filter.
The proposed QPSK demodulator uses polarity difference from digitized QPSK signal for the demodulation process and is given a new code name 8S-QPSK.
As a result, many special data acquisition methods, digital signal processing algorithms, and demodulation techniques have been invented to recover measured phase signals.