The individual rotten water purification tank recently discharges wastewater and sewage through the outlet without purification ability. The outlet water and affiliated water purification tank with microorganism cultivator tank cultivates microorganism and then drops the value BOD, COD of sewage and discharges the quality of water into the outlet. The blower and water pump operating continuously prompts the waste of energy and deterioration of equipment. Each room of deposition tank, foaming tank, microorganism cultivator tank is equipment with the sludge detection senses so it can detect the density of each room. The power-drive plant of the blower and water pump which are the system cultivating the microorganism must be made as fuzzy controlization (If the sludge amount of each room become higher, the rate of operation of blower and water pump must heighten, on the contrary, in case of row sludge amount, the total handling amount and microorganism handling amount of each room of control. Tank reducing the rate of operation must be DB. At present, the blower amount in proportion to the sludge and oxyzen demanding amount has to control. Each room mus be checked outlet level of the outlet, also each room must flow backward discharge materials, and must operate feed-back control until we want to be come as a below value of BOD/COD(10PPM ; KS).

The individual rotten water purification tank recently discharges wastewater and sewage through the outlet without purification ability. The outlet water and affiliated water purification tank with microorganism cultivator tank cultivates microorganism and then drops the value BOD, COD of sewage and discharges the quality of water into the outlet. The blower and water pump operating continuously prompts the waste of energy and deterioration of equipment. Each room of deposition tank, foaming tank, microorganism cultivator tank is equipment with the sludge detection senses so it can detect the density of each room. The power-drive plant of the blower and water pump which ate the system cultivating the microorganism must be made as fuzzy controlization (If the sludge amount of each room become higher, the rate of operation of blower and water pump must heighten, on the contrary, in case of row sludge amount, the total handling amount and microorganism handling amount of each room of control. Tank reducing the rate of operation must be DB. At present, the blower amount in proportion to the sludge and oxygen demanding amount has to control. Each mom must be checked outlet level of the outlet, also each room must flow backward discharge materials, and must operate feed-back control until we want to be come as a below value of BOD/COD(10PPM ; KS).

본 논문은 사양기에 접어든 글로벌 산업에서 경쟁중에 있는 기업들이 합병할 수 있도록 허용하는 것이 사회적으로 바람직한지 분석할 수 있는 모델을 정책결정자들에게 제시한다. 본 고에서는 합병 (horizontal merger)을 허락하는 것이 자국의 기업으로 하여금 노후화된 생산설비를 은퇴시키고, 각 생산공정의 새로운 생산설비만 가동하도록 유도함으로써 외국의 경쟁업체에 대한 전략적 경쟁우위를 확보하게 한다는 것을 보여준다. 매년 감소하고 있는 특정제품에 대한 수요는 시장지배력 효과 (market power effect)의 폐해가능성을 약화시키며 사양산업에서는 기업이 원하면 합병할 수 있도록 허용하는 것이 오히려 사회후생을 극대화 할 수 있는 기회를 제공한다. 정책결정자들이 적정한 수준이라고 수긍할 정도의 social surplus를 창출하는 효율성제고가 기업합병을 통해 이루어질 수 있으면, 해당기업들이 탄원하는 기업합병을 정부 또는 법원이 독과점에 대한 우려 때문에 기각하지 않도록 하여야 할 것이다.

Proportion of elderly patients is gradually increasing in the republic of Korea. However, intravenous recombinant tissue plasminogen activator (rt-PA) therapy is recently not recommended in elderly acute ischemic stroke patients, although old age is not a proven contraindication to intravenous rt-PA. The purpose of this study was to investigate the safety and prognosis of intravenous thrombolysis in elderly patients.