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유해폐기물 목록화를 위한 무기·유기물질류의 함량특성 - 광업, 농업, 목재, 피혁, 석유정제 중심으로 -
김신조,이기용,강영렬,황동건,허준혁,이은정,강미아,오길종 한국폐기물자원순환학회 2009 한국폐기물자원순환학회지 Vol.26 No.5
This study investigated for content leaching characteristics of 72 hazardous industrial wastes among 157 assinged wastes discharged from 59 workplaces by analyzing 7 regulated and 8 unregulated inorganic metals, and 4 unregulated organic chemicals. Among the unregulated inorganic metals, Ni, Zn and Be from industrial wastewater treatment sludges of EU waste code 01 were detected in concentrations of 44,527, 121,330 and 136 mg/kg, respectively. In case of Sb from waste synthetic resins of EU waste code 04, the concentration was 1,693 mg/kg. All of above-mentioned substances exceed suggested standards. Among the inorganic metals regulated by the Korean Waste Management Act, the concentration of Cu from industrial wastewater treatment sludges of EU waste code 01 and Pb from them of EU waste code 05 were 205,097 and 25.7 mg/kg, respectively. These two regulated metals are over regulation standards. In PAHs contained in incineration ashes of EU waste code 03, the concentration of phenanthrene, anthracene, fluoranthene, benzo[b]fluoranthene were 12.304, 12.325, 15.615 and 6.024 mg/kg (dry base) that the values of these organic chemicals are also higer than 1st standards of Korean Ocean Dumping Act.
김신조 진주여자전문대학 1998 論文集 Vol.21 No.-
The Just-In-Time system is a kind of Zero Inventory production system, Which carries on producing required quantity in the required time in manufacturing operations. The JIT system consists of factors: smoothness of production operations, elasticity and diversity in processing, standardization of operations, and kanban system. The JIT system is used for operating a factory continuously without hindrance It also reduces throughput time and improves productivity and quality. The cost management in JIT system includes cost planning, cost reduction, and cost control. A long term or ideal objective should be presented in JIT cost management, which indicates removing non-value-added operation and reducing cost Furthermore, continuous effort to reduce resources for value-added operation should be made once the JIT system is introduced, the accounting system should be simplified. The conventional standard costing system contains product costing method, using sequential tracking in cost, and generates relatively high cost. On the other hand, backflush costing system contains cost accumulation method, which is used for reduction in cost, and it is primarily applied for the JIT system costing. In the JIT system, the Work-in-process is minimized, and raw materials and work-in-process account is integrated into raw-in-process account. Actually the costing is possible in JIT when it is given input point in time and journalizing in the final completion point in time.