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우리나라 보호무역정책의 후생효과분석 - 관세를 중심으로 -
전영서(Jeon Young Sea),손정식(Son Jung Shik) 한국경제발전학회 2003 經濟發展硏究 Vol.9 No.2
본 연구에서는 우리나라 정부가 추진한 바 있는 보호무역정책의 사회적 비용효과를 분석하려고 하였다. 이러한 목적을 달성하기 위해 구체적으로 현재 정부의 보호무역정책으로 우리나라 국민들이 부담하는 사회적 비용이 어느 정도 수준인지를 계량적으로 파악해 보고자 하였다. 특히, 제조업 22개 산업들이 완전 경쟁적 시장이라는 가정 하에서 정부가 무역장벽중 관세만을 설정하였을 경우 이들 산업들이 관세로 인하여 얼마만큼의 사회후생손실을 제공하였는지 계량적으로 추정하고자 하였다. 실증결과에 따르면 정부가 부과한 관세로 인하여 얻는 사회후생손실의 규모는 1986년도에는 GDP의 9.48%수준으로 매우 높게 계산되었다. 그러나 관세로 인한 사회후생손실의 규모는 1990년도에는 2.33%, 1995년도에는 0.96%, 1998년도에는 0.76%로 나타났다. 이렇게 급격히 관세로 인한 사회후생손실이 감소한 이유는 WTO에 가입하면서 정부의 관세인하정책에 비롯된 것으로 해석될 수 있다. Feenstra(1992)는 미국 제조업에 대해서 1985년에 관세의 경제적 효과를 추정한 결과 보호비용이 미국 GDP의 0.3%에서 0.73% 수준이다는 것을 밝히었다. 우리나라의 경우 미국의 대상년도와 유사한 시점인 1986년도의 사회적 비용이 GDP의 약 9.5% 수준으로 미국의 10배 혹은 30배 수준으로 비교적 높게 나타난 것은 당시 우리나라의 관세율이 미국에 비해 높게 나타났기 때문으로 해석된다. 그러나 1998년도를 기준으로 우리나라의 사회적 비용을 계산해 보면 GDP의 0.76%수준으로 미국의 1985년 수준에 근접해 가고 있다는 것을 알 수 있다.(JEL : F4) We try to estimate the welfare loss of manufacturing industry in Korea induced by the trade barriers such as tariff protection. We find in the empirical result that the welfare loss in Korea due to tariff protection was estimated by 9.48% in 1986, 2.33% in 1990, 0.78% in 1998 in terms of GDP, which it was continuously declined due to the open market policy induced by the trade liberalization policy in Korea.
문제중심 학습(Problem Based Learning)이란 무엇인가?
전시영(Sea Young Jeon),송준경(Jun Kyung Song) 한국의학교육학회 1995 Korean journal of medical education Vol.6 No.2
Problem-based learning(PBL) is defined as a process of acquiring understanding, knowledge, skills and attitudes in the context of an unfamiliar situation, and applying such learning to that situation. PBL is a way of enabling students thinking more efficiently than they can do in the traditional methods of largely rote learning. Because mordern medical knowledge is growing at an enormous rate, PBL is though as a mean to cope with the rapidly increasing, rapidly changing information base of medicine. The definition, goals, practice, strength, and problems of PBL in medical education are discussed. The curriculum and educational philosophy of McMaster Medical School, where PBL in small group tutorials predominates the programme, are also introduced. Hinderences from implementing PBL in our medical education are discussed.
순환굵은골재 치환율 및 양생방법에 따른 콘크리트의 압축강도특성
전에스더(Jeon Esther),윤현도(Yun Hyun-Do),최기선(Choi Ki-Sun),유영찬(You Young-Chan),이세현(Lee Sea Hyun),이도헌(Lee Do-Heun) 대한건축학회 2007 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.27 No.1
Recycling demolished concrete as an alternative source of coarse aggregates for the production of new concrete can help solve the growing waste disposal crisis and the problem of depleted natural aggregates. However, to make such recycling feasible, the strength and durability of the recycled aggregate concrete must be assured. In this paper, fresh(air contents, slump) properties and the compressive strength of recycled aggregate concrete according to curing method are investigated experimentally. Concrete specimens were fabricated by ready-mix concrete and tested with different recycled coarse aggregate replacement level of 0%, 30%, 60% and 100%, respectively. For recycled coarse aggregate concrete, the change of air contents were bigger than natural coarse aggregate concrete. The air-cured/water cured strength ratio of recycled coarse aggregate concrete was 84.23~99.39%. Compressive strength of concrete with different recycled coarse aggregate replacement level was shown to be similar.
Novel anti-melanogenic hexapeptoids, PAL-10 and PAL-12.
Lee, Miri,Park, Hyeonji,Jeon, Sea Wha,Bang, JeongKyu,Chung, Ka Young,Choi, Dal Woong,Kim, EunJoo,Lim, Kyung-Min Springer-Verlag 2015 Archives of dermatological research Vol.307 No.3
<P>Diverse compound sources are being explored for de-pigmentation activities to develop novel therapeutic agents or functional cosmetic ingredients for hyper-pigmentation disorders. Peptoids are a class of peptidomimetics whose side chains are appended to the nitrogen atom of the peptide backbone, instead of α-carbon. Peptoids are more durable against proteolysis and are being actively investigated in drug discovery, but rarely studied as cosmetic ingredients. Here, we demonstrated that new hexa-peptoids, PAL-10 and PAL-12, can inhibit melanogenesis in B16F10 melanoma cells, a 3D pigmented human skin model (Neoderm(?)-ME, Tegoscience Co) and zebrafish. Anti-melanogenic effects of PAL-10 or PAL-12 as compared with arbutin, a positive control in B16F10 cells, Neoderm(?)-ME and zebrafish were statistically significant and concentration-dependent anti-melanogenic effects were manifested as determined by image, histology, and melanin contents. Anti-melanogenic effects of PAL-10 appeared to be from enzymatic inhibition of tyrosinase while mRNA expression of melanogenic enzymes was not affected. In conclusion, we demonstrated that PAL-10 and PAL-12 can be used as a new cosmetic ingredient with strong brightening efficacies.</P>