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재제조품의 온실가스배출 저감효과 산정 표준화를 위한 핵심 요소 도출
김남석,배국표,노재학,강홍윤,황용우,Nam Seok Kim,Kook Pyo Pae,Jae Hak No,Hong-Yoon Kang,Yong Woo Hwang 한국자원리싸이클링학회 2024 資源 리싸이클링 Vol.33 No.2
Although the Paris Agreement in 2015 aimed to limit global temperature increases to below 2℃ and eventually to 1.5℃ to address the climate crisis, global temperature continues to rise. Developed countries have proposed a circular economy as a major strategy to tackle this issue. Detailed implementation methods include reusing, remanufacturing, recycling, and energy recovery. Remanufacturing has a greater potential to achieve high added value and carbon neutrality than other resource circulation methods. However, currently, no standardized method for quantitatively evaluating the greenhouse gas (GHG) reduction effects of remanufacturing exists. This study compares and analyzes recent research trends since 2020 on the calculation of GHG emission reduction effects from remanufacturing. It also examines international standards for environmental impact assessment, including GHGs and environmental performance labeling systems. This study derives the key factors for standardizing the calculation of the GHG emission reduction effects of remanufactured products.
한반도 평화와 번영시대에 부합하는 군 정신전력 교육 발전방안
김남석,박효선,Kim, Nam-Seok,Park, Hyo-Sun 대전대학교 군사연구원 2018 군사학연구 Vol.15 No.-
This study focused on how to supplement and develop military spiritual education in response to promotion of peace and prosperity and Change of Security Environment on the Korean Peninsula. In order to succeed in the peace and prosperity on the Korean Peninsula policy, Strengthening the military spiritual education is necessary. This study was analyzed through the survey and the results are as follows: First, the awareness level of military spiritual education is more than 68%. Second, the satisfaction level of education has been quit motivated, but, the respondents demands various methods of eduction. Third, the current mental power scores showed no significant difference for environmental change. In addition, based on the results of the research, the problem of military spiritual education is as follows. It is not enough to secure the identity that can firmly support the era of peace and prosperity on the Korean peninsula. Poor budget support might hinder improving poor education facilities and outdated equipment. Furthermore, there is a lack of research on future-oriented educational system in support of traditional education methods of repetition-type repeated education and unification. Therefore, we deducted the following development strategies for the military spiritual education in this paper. First, it is necessary to strengthen the military spiritual education to support the era of peace and prosperity on the Korean Peninsula. Second, for enhancing educational environments, the educational facilities and equipments should be improved by understanding the characteristics of the education target. Third, the integrated management of military research institutes specialized in military spiritual education should be pursued as a system development for ensuring the continuous effect of education. In conclusion, continuous attention and research are needed to establish national perspective and national security perspective, raise the military spirit and utilize various education development programs in order to develop efficient military spiritual education in the future.
연속반응기에서 Styrene 과 n - Butylmethacrylate 의 용액 공중합의 속도론
김남석,설수덕 ( Nam Seok Kim,Soo Duk Seul ) 한국공업화학회 1997 공업화학 Vol.8 No.3
스티렌(St)과 n-부틸메타크릴레이트(n-BMA)를 용매인 톨루엔에서 과산화벤조일(BPO)를 개시제로 사용하여 80℃에서 연속반응기를 사용하여 용액공중합을 행하였다. 반응물 부피, 체류시간은 각각 0.6L, 3시간으로 하였다. 단량체 반응성비 r₁(St)과 r₂(BMA)는 Kelen-Tu¨do¨s방법 (또는 Fineman-Ross방법)으로 결정하였다. : r₁=0.75(0.67), r₂=0.61(0.56). 공중합체의 가교정지인자, ψ값은 스티렌의 전체 조성에 대해 0.44∼0.78값을 가지고 공중합체내 스티렌 조성이 증가할수록 ψ값도 증가하고 있다. 스티렌과 부틸메타크릴레이트의 공중합반응은 2차 반응속도식에 따랐으며 시뮬레이션한 전환율과 공중합 속도를 실험결과와 비교하였다. 동적인 정상상태에 도달하는 평균시간은 체류시간의 3.5배였다. Solution copolymerization of Styrene(St) and n-Butylmethacrylate(BMA) was carried out with Benzoylperoxide (BPO) as an initiator in toluene at 80℃ in a continuous stirred tank reactor. Reaction volume and residence time were 0.6 liters, 3 hours respectively. The monomer reactivity ratios, r₁(St) and r₂(BMA) were determined by both the Kelen-Tu¨do¨s method and the Fineman-Ross method; r₁= 0.75(0.67), r₂ = 0.61(0.56). The cross-termination factor, ψ factor of the copolymer over the entire St compositions ranged from 0.44 to 0.78. The ψ factors of St-BMA copolymer increased with increasing St compositions. Our present system showed that the continuous copolymerization of St with BMA followed second-order kinetic behavior. The simulated conversions and copolymerization rates were compared with the experimental results. The average time to reach dynamic steady-state was three times and half of the residence time.