...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. 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 |
…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。 【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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