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Poly(styrene carbonate)의 열분해에 의한 고리형 Styrene Carbonate의 합성
유진이(Yoo, Jin-Li),신은정(Shin Eunjung),구대철(Ku Daechul),이윤배(Lee Yoonbae) 한국산학기술학회 2006 한국산학기술학회 학술대회 Vol.- No.-
지구의 온난화를 가속시키는 주요물질인 이산화탄소(CO₂)와 styrene oxide를 Zinc Glutarate를 촉매로 하여 800-1000psi, 750℃에서 반응시켜 합성한 Poly(styrene carbonate)(PSC)를 질소분위기하 750℃에서 열분해하여 고리형 styrene carbonate를 합성하였다. 생성물은 GC-Mass로 분석하여 확인하였다.
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유진이(Yoo, Jin-Li),전준호(Jun, Joon-Ho),성언경(Sung, Un-Gyung),이윤배(Lee Yoonbae) 한국산학기술학회 2007 한국산학기술학회 학술대회 Vol.- No.-
지구의 온난화를 가속시키는데 일조하고 있는 이산화탄소(CO₂)와 Epoxy를 Tetrabutylammonium bromide를 촉매로 하여 초임계 상태에서 반응시켜 2차 전지의 전해질 물질로 사용 가능한 4-ethyl-1,3-dioxolan-2-one, 4-methyl-1,3-dioxlan-2-one, 4-phenyl-1,3-dioxolan-2-one, 4-Chloromethyl-1,3-dioxolan-2-one을 합성하여 ¹H-NMR을 이용하여 분석하였다.
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유진수(Jin Soo Yoo) 한국산업조직학회 2002 산업조직연구 Vol.10 No.3
The privatization process of KT which was completed in May, 2002 revealed several problems. For example, there are concerns on the possibilities of worsening economic concentration and on the anti-competitive combination between KT and SK Telecom. The privatization of KT also raises some important issues on competition. First, the market power of KT in local telecommunication market can be transferred into other markets such as internet services. Second, debates are expected on the current rate system which is not based on cost, because of its effect on competition. Third, the universal services which have been provided by KT will be affected by the privatization. On the other hand, the debated on subsidy-banning policy on mobile phones will continue regardless of the privatization. These issues are closely related with the tradition of managed competition by the government. The competition policy in the future, therefore, must be focused on building level-playing fields among competitors and on deregulation to promote effective competition in telecommunication industry.
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유진수 ( Jinsoo Yoo ) 한국산업조직학회 2018 산업조직연구 Vol.26 No.2
This study analyses the effect of sharing behavior on durable-goods. Result shows that, under monopoly, consumers as well as the monopolist benefit from the sharing behavior. Consumers are willing to pay more when they can share the durable-goods with others. As a result, the monopolist increases the production which increases the consumer surplus further. Under perfect competition, similar result is obtained. Even though the price of the durable-goods does not change with the sharing, more consumers are willing to buy the goods when sharing is possible.
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