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Academia - Collins - Pocket Scientific Dictionaries - Computer - English - French - Arabic Letter 4_M

minifloppy
disquette f

Diskette. A form of random access memory. In microcomputers, random access memory consists of a 5.25-inch flexible magnetic disk inside a cardboard case, parts of which have been cut to allow the disk drive unit (disk unit) and the read/write head to access the disk. When the disk spins at 300 rpm, it is rigid and the head moves in a straight line between the center and the edge. Just as a tape cassette uses two parallel tracks on the tape, a disk drive uses concentric circular tracks on the disk. These circular tracks - 40 on each side - are divided into sectors, and although the length of the track in the sector becomes shorter near the center, it still takes the same amount of time for the head to cross it. This makes the data more compressed in the internal tracks of the disk. The soft disk in its cover looks like this:

Time point: A small hole in the disk that tells the disk spinner where it is while it is spinning

Write protection tab. If the tab is covered, no data can be entered into the disk.

Magnetic disk

The head gets this area by moving in a straight line over the surface.

Because the microfloppy is rigid, it is less susceptible to damage than the soft disk and is taking its place.

MISP

Microelectronics Industry Support Program. Abbreviation for Microelectronics Industry Sup port Programme.

modem
modem m

Modulator - Detector. Abbreviation for /Modulator DEModulator, a device for connecting two computers via a telephone line, consisting of a modulator that converts computer signals into audio signals, and a corresponding detector.


modulation
modulation f

Modulation. The technique of using data signals to modify a transmitted wave so that the wave carries data signals. There are three ways to influence the wave: by changing its amplitude (volume), frequency, or phase. By changing one of these parameters using a modem, a data signal can be superimposed on the carrier wave.

Digital data signal.
Sent sine wave
Amplitude modulation.
Frequency modulation.
Phase modulation.

modulator/demodulator
modulateur/démodulateur m

See modem.

modulus
modulo m

Coefficient. An integer in the arithmetic system of remainders used to divide by another integer, the result of which is the remainder.

For example:
11 ÷ mod 7 = 4

Coefficients are used in checksum and weighted check digit operations.

monitor
éscreen m

Monitor. Most microcomputers display their output on a television set, which receives the signal via an antenna jack. For better clarity, especially for graphics, a monitor is needed that accepts a video signal. This signal has a lower frequency, although it can be black and white or color. In addition, there are red-green-blue (RGB) monitors that accept separate signals for the three colors, forming an image on a color screen. The word monitor is also used to describe any device or part of an operating system that checks what is going on in a computer system and reacts to a malfunction.