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日米同盟と東北アジアの安全保障 - 日米安保協力の現狀と課題 -
鄭勛燮 동북아시아문화학회 2005 동북아 문화연구 Vol.1 No.9
Since the end of the World War Ⅱ,a primary objective of the U.S. policy toward the Northeast Asia has been the promotion of peace and stability on this area, that is first and foremost maintained by a credible deterrent against the possible Soviet aggression. The continued basing of the U.S. forces in Japan under the Japan‐U.S. Security Treaty makes this deterrent both possible and credible. Recently, the Japan‐U.S. alliance has been undergoing some changes. The changes stem from the end of the Cold War, September 11 terrorist attacks, and the wars in Afghanistan and Iraq. These factors have forced Japan to form the new Japan‐U.S. security relations. Now, under the Global Posture Review (GPR) plan, Bush Administration is seeking to transform its military into a leaner, more mobile force to deal with the shifting post‐Cold War security environment. The Japan and U.S. also have been negotiating for more than a year over the reorganization of the U.S. forces in Japan. The U.S. still sees Japan as the linchpin of its security policy in the Northeast Asia. The purpose of this paper is mainly to analyze the present conditions and the issues of Japan‐U.S. security cooperation. This paper also examines about the correlation of a Japan‐U.S. alliance and the security of the Northeast Asia by considering the influences which Japan‐U.S. security cooperation has on neighboring countries.
직업계고 교사와 기업 담당자의 학습중심 현장실습에 대한 인식 차이 분석 연구
정훈섭(Hunseop Jeong),강철민(Chol Min Kang),이병욱(Byung-Wook Lee) 한국기술교육학회 2021 한국기술교육학회지 Vol.21 No.2
이 연구는 직업계고 현장실습에 대한 학교 교사와 기업 담당자 간의 인식 차이 분석을 통해 추후 산학협력 성과의 극대화를 위한 정책마련에 참고가 될 수 있는 기초 자료를 도출하는 데 있다. 이를 위해 이 연구에서 설정한 연구 문제는 다음과 같다. 첫째, 직업계고 교사와 기업 담당자 간의 현장실습 목적 및 운영 단계별 방안에 대한 인식 차이는 어떠한가? 둘째, 직업계고 교사와 기업 담당자 간의 현장실습 개선 방안에 대한 인식 차이는 어떠한가? 구체적인 연구 결과는 다음과 같다. 첫째, 현장실습 목적에 대한 교사와 기업 담당자의 인식을 비교한 결과 두 집단 간의 인식 차이가 나타나는 것으로 확인되었다. 특히 현장실습 참여 목적과 현장실습 운영 단계 중에서 계획 및 운영 단계에서의 인식 차이가 나타났다. 둘째, 현장실습 운영 단계별 방안에 대한 인식 조사 결과, 교사보다 기업 담당자가 학교와의 밀접한 산학협력관계를 더욱 요구하는 것으로 나타났다. 교사는 현장실습을 시·도교육청에서 주관하기를 희망하지만, 기업 담당자는 학교와 기업의 공동주관을 희망하는 것으로 나타났다. 셋째, 현장실습 개선과 관련하여 제시된 장애 요인, 지원 필요 사항, 기대 효과에 대한 인식 조사 결과, 두 집단 간의 인식 차이가 나타났다. 교사는 기업 담당자보다 장애 요인에 대한 우려와 지원에 대한 필요성을 높게 인식하고 있지만, 그와 반대로 지원을 통해 얻어지는 기대 효과에 대해서는 낮게 인식하고 있었다. The purpose of this study is to derive basic data that can be used as a reference for policy preparation for maximizing the results of industry-school cooperation in the future through analysis in the difference of perception between vocational high school teacher and industry manager in learning-centered On-The-Job training. To analyze this, the research questions set up in this study are as follows. First, what is the difference in perception between vocational high school teacher and industry manager on the purpose of On-The-Job training and the plan for operation step? Second, what is the difference in perception between vocational high school teacher and industry manager on how to improve On-The-Job training? The detailed research results are as follows. First, as a result of comparing the perceptions of teachers and industry manager on the purpose of On-The-Job training. It was confirmed that differences in perception between the two groups appeared. Second, as a result of a survey on the perception of the plan for operation step of On-The-Job training, it was found that industry manager more demanded close industry-academia cooperation with schools than teacher. It was found that the teacher hopes to host the On-The-Job training at the provincial offices of education, but the industry manager hope to co-host the school and the company. Third, as a result of a survey on the perception of obstacle factors, support needs, and expected effects presented in relation to improvement of On-The-Job training, differences in perception between the two groups were found. Teacher is more aware of the need for support and concerns about obstacles than those in charge of industry manager, but on the contrary, they perceived the expected effect of support to be low.
정훈섭 ( Hoon-sup Jung ),현길수 ( Kil-soo Hyun ) 한국수처리학회(구 한국수처리기술연구회) 2020 한국수처리학회지 Vol.28 No.3
Microplastics (MPs) with diameters less than 5 mm in wastewaters are being increasingly discharged into aquatic environment from plastic industries, personal care products, and synthetic textiles. Futher, MPs have a negative impact on the environment due to their extremely low biodegradability. This study aims at investigating the behaviour of MPs in treated waters using real biological nutrient removal (BNR) systems. In terms of shape, the majority of MPs in real wastewaters are fibers and fragments. Most BNR systems achieved high efficiency (>95%) in reducing the MPs from wastewaters. In the BNR systems, the profiles sizes of MPs removal are in the following order: aeration tank (AT) > primary settling tank > total phosphorus removal tank > return sludge > final settling tank (FST). Higher efficiency of MPs removal during aeration in the AT as compared to the other processes resulted in the absorption and fixation of MPs in the activated sludge and biofilm. In contrast, lower efficiency of FST resulted in the MPs not being absorbed, which were floating in treated water without particulate; thus, the floating MPs were discharged without settling due to their lower specific gravity. Therefore, a filtration process should be introduced to effectively reduce the MPs in the effluent before it enters the FTS.
MBR공정의 질소.인저감 효과 개선을 위한 영향인자분석
정훈섭 ( Hoon-sup Jung ),현길수 ( Kil-soo Hyun ) 한국수처리학회(구 한국수처리기술연구회) 2020 한국수처리학회지 Vol.28 No.4
This study aims to investigate the effects of carbon/nitrogen/phosphorus (C/N/P) ratio and recirculation on nutrient removal in a membrane bioreactor (MBR) and anaerobic/aerobic(AN/O) processes coupled with MBR by using real facilities. Treatment capacities of a MBR and an AN/O-MBR are 5,000 m3/d and 15,000 m3/d, respectively. Influent characteristics of real wastewater used for this study are BOD <200 mg/L, COD <220 mg/L, T-N <65 mg/L, T-P <8 mg/L, and E-coli.< 100,000 No/mL. In reducing organics and nutrients, AN/O-MBR performance achieved higher efficiencies (5-40% higher) than those of MBR. In particular, the removal efficiencies of N and P by AN/O-MBR were about 0.2-0.4 times higher than those by MBR while both MBR and AN/O-MBR achieved high efficiencies ( >95%) in reducing chemical oxygen demand (COD). For AN/O-MBR in reducing total nitrogen (T-N), internal recirculation (IR) of 1.5-2.0Q achieved higher efficiencies (10-30% higher) than those of IR. In particular, the addition of methanol as carbon source into MBR process achieved higher efficiencies (20-25% higher) than that without methanol. For total phosphorus (T-P) removal, the addition of polyaluminum chloride (PAC) as coagulant into the MBR process achieved higher efficiencies (30-80%) than that without PAC. For transmembrane pressure (TMP) build-up, the results reveal that the additions of methanol and PAC have effects in mitigating TMP build-up compared to MBR process without them.