Abstract: The present technology provides a foreign substance collection kit including: an upper kit part having a hollow body part with a first hollow channel, in which ends of the first hollow channel are open toward an upper surface and a lower surface of the hollow body part to form a first inlet and a first outlet; a lower kit part having a hollow body part with a second hollow channel, in which both ends of the second hollow channel are open toward an upper surface and a lower surface of the hollow body part to form a second inlet and a second outlet; and a foreign substance collection filter fixed between the upper and lower kit parts by combining the upper kit part and the lower kit part to concentrically arrange the first hollow channel and the second hollow channel, the foreign substance collection filter having a predetermined pore size.

Abstract: The present technology provides a device for detecting foreign substances in an electrode active material including: a suspension tank containing a suspension in which an electrode active material is uniformly dispersed; a filter having a predetermined pore size, and configured to filter the suspension transferred from the suspension tank to collect foreign substances in the electrode active material; and an analyzer configured to analyze the filter in which the foreign substances are collected to detect at least one of types, a total number, shapes, and sizes of the foreign substances. The present technology also provides a method of detecting foreign substances in an electrode active material.

Abstract: A multiplexing/demultiplexing apparatus in a digital communication system with a variable frame structure and a method of controlling the same.