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So the radio receiving equipment of the time did not have to convert the radio waves into sound like modern receivers, but merely detect the presence or absence of the radio signal. The device that did this was called a detector. The first widely used detector was the coherer, invented in 1890. The coherer was a very poor detector, insensitive ...
Another source estimates that a 100 m long and 10 m wide submarine would produce a magnetic flux of 13.33 nT at 500 m, 1.65 nT at 1 km and 0.01 nT at 5 km. [6] To reduce interference from electrical equipment or metal in the fuselage of the aircraft, the MAD sensor is placed at the end of a boom or on a towed aerodynamic device. [7]
It was a 4-coil induction balance for detecting submerged metallic torpedoes and iron ships and the like. [8] Given the development time involved this may have been the earliest known device specifically constructed as a metal detector using magnetic induction.
A word family is the base form of a word plus its inflected forms and derived forms made with suffixes and prefixes [1] plus its cognates, i.e. all words that have a common etymological origin, some of which even native speakers don't recognize as being related (e.g. "wrought (iron)" and "work(ed)"). [2]
The first moving-pointer current-detecting device was the galvanometer in 1820. These were used to measure resistance and voltage by using a Wheatstone bridge, and comparing the unknown quantity to a reference voltage or resistance. While useful in the lab, the devices were very slow and impractical in the field.
The electron capture detector is used for detecting electron-absorbing components (high electronegativity) such as halogenated compounds in the output stream of a gas chromatograph. The ECD uses a radioactive beta particle (electron) emitter in conjunction with a so-called makeup gas flowing through the detector chamber.
A word matrix is a visual representation of the relationships between words that share common morphemes. It allows students to explore patterns of word formation and deepen their understanding of the morphological structure of related words. [10] [6] [11] A word matrix showing some of the members of the <sign> word family
The player must rotate their device to read certain lines of text as they navigate through the game world. Device 6 uses mainly text in its gameplay, and the player swipes the screen to move through or review the story. [4] The text may turn or split into branches in certain points of the game, adapting to the protagonist's movements in the ...