Abstract: Provided are a multi-channel isothermal amplification system and an operation method. The operation method comprises: a first step in which sample tubes are disposed in holes formed in a line in a heating block, respectively, wherein the heating block comprises: a first heating block area in which some of the plurality of holes are formed in a line; and a second heating block area in which the rest of the plurality of holes are formed in a line, and which is disposed to be in a line with the first heating block area, wherein the first heating block area and the second heating block area are spaced apart from each other at an interval as much as one hole area between two holes; and a second step in which an optical system moves in a longitudinal direction of the first heating block area and the second heating block area.

Abstract: The present invention provides an apparatus and method for detecting sounds from a human body and displaying the detected sound information. The apparatus comprises a stethoscope for collecting sounds, a piezoelectric device for converting the collected sounds into an electric signal, a speaker for converting the electric signal into audible sound, an A/D converter for digitizing the electric signal, a memory for storing the digitized sound data, a microprocessor for issuing the switch control signal, extracting features of the stored data, analyzing the extracted feature values statistically, storing the analyzed statistical figures in the memory, and reading out the statistical figures from the memory, and an LCD panel for displaying the LCD signals.

Abstract: An improved multi-changer Video Cassette Recorder (VCR) for recording or reproducing more than one cassette tape without the need to manually perform an additional cassette tape changing operation, facilitating easier operation of the system. The multi-changer VCR includes a main body of the multi-changer video cassette tape recorder; a deck mechanism provided in the multi-changer video cassette tape recorder; a cassette tape receiving rotation device having a plurality of cassette tape receiving groove sections formed on an upper surface of the cassette tape receiving rotation device for receiving a plurality of cassette tapes. The cassette tape receiving groove sections are arranged at the same plane and are rectangular about the center of the tape casseter receiving rotation device in the length-wise directions of the cassette tape receiving groove sections, so that the upper surface of the cassette tape receiving rotation device is optimized, and the compact size of the same can be achieved.