A heat exchanger has a core case, at least one fin case disposed in the core case, and pair of upper and lower fins disposed in the fin case. The method includes filling an aperture etched into an insulation layer on a wafer substrate with a fill-in material for isolating the insulation layer from a photoresist layer deposited thereafter and depositing a photoresist layer on the insulation layer. A plurality of abnormal behavior scoring engines operating concurrently to generate abnormal behavior assessment models by scoring the behavior models. 1 to 30 parts by weight of an organohydrogenpolysiloxane having at least two hydrogen atoms bonded to silicon atoms in one molecule; and 0. A transformation cost is calculated by considering the data loss, potential data loss, and scaling. As a result, transparent transmission of voice data in a MGW is avoided so that transmission delay can be reduced and additional loading of the MGW can be avoided.