grid

Japanese: grid
grid

...Diodes were used in all kinds of communication devices and measuring instruments as rectifying elements that convert alternating current into direct current, but since the 1970s, semiconductor elements have been used instead.
[Grid Control Tube]
(1) Triode A mesh or grid-like electrode called a grid is inserted between the cathode and anode of a diode tube. A positive voltage is applied to the anode (tens to hundreds of volts in small tubes) and a negative voltage is applied to the grid (-several to -several tens of volts) relative to the cathode. Electrons flow through the gaps in the grid to the anode, but a slight change in the grid voltage causes a large change in the anode current, which has an amplifying effect.

From [Excavation]

...The reason for leaving the soil layer in a bank shape is to make it possible to observe the condition of the sedimentary layer in cross section during excavation. Some people call this excavation method grid excavation or grid survey, since the area is set up in a grid shape. In contrast to this type of excavation of a large area, excavation of a minimum area in the optimal part of the ruins for the purpose of obtaining information to solve a specific problem is sometimes called partial excavation.

*Some of the terminology that mentions "grid" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…二極管は交流を直流に変える整流素子としてあらゆる通信機,計測器などに使われたが,70年以降半導体素子が使われている。
[格子制御管]
 (1)三極管 二極管の陰極と陽極の間に制御格子(グリッドgrid)と呼ばれる網状または格子状の電極を挿入したもので,陰極に対し陽極には正(小型管では数十~数百V),格子には原則として負(-数~-数十V)の電圧を与える。電子は格子の隙間を通り陽極へ流れるが,格子電圧のわずかの変化で陽極電流が大きく変化するため増幅作用をもつ。…

【発掘】より

…畔状に土層を残すのは,発掘中に堆積層の状況をその断面で観察できるようにするためである。この発掘調査方法は格子(グリッドgrid)状に区画を設定するところから,グリッド発掘,グリッド調査と呼ぶ人もいる。この種の広大な面積の発掘調査に対し,特定の問題解決のための情報入手を目的として,遺跡のなかの最適の部分で最小限の面積を対象に実施する発掘調査を部分発掘と呼ぶことがある。…

※「grid」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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