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Effect of $ZnCl_2$ on Formation of Carbonized Phenol Resin Anode
Kim Han-Joo,Hong Ji-sook,Son Won-Ken,Park Soo-Gil,Oyama Noboru The Korean Electrochemical Society 2000 한국전기화학회지 Vol.3 No.2
Lithium ion Battery(LIB)의 음극 활물질로써 리튬을 대체하기 위한 노력으로 phenol resin을 탄화시킨 탄소재료를 사용하였다. Phenol resin을 소성하면 축합반응을 일으키면서 탄화되어 무정형 탄소가 된다. 무정형 탄소는 층간거리가 넓어 리튬의 삽입과 탈리가 용이하지만 탄소간의 결합력이 약하여 구조적 붕괴가 일어난다. 이러한 문제를 해결하기 위해 세공형성제로서 $ZnCl_2$를 사용하였다. $ZnCl_2$는 생성된 물질에서 3차원적 망상구조로 성장하는 개방세공을 형성하는 세공형성제로서 뿐만 아니라, 벌크 첨가제가 도핑된 느슨한 구조를 형성하는 미세세공 형성제로서 작용하였다. SEM을 통해서 구조적 차이를 알 수 있었으며, XRD분석으로 층간의 거리를 알 수 있었다. CV측정을 통해 두 가지 샘플에 대한 산화와 환원 반응의 차이를 알아보았다. For replacing Li metal at Lithium ion Battery(LIB) system, we used carbon powder material which prepared by Pyrolysis of Phenol resin as starting material. It became amorphous carbon by Pyrolysis through it's self condensation by thermal treatment. Amorphous carbon can be doped with Li intercalation and deintercalation because it has wide interlayer. However, it has a problem with structural destroy due to weak carbon-carbon bond. So, we used $ZnCl_2$ as the pore-forming agent. This inorganic salt was used together with the resin serves not only as the pore-forming agent to form open pores, which grow into a three-dimensional network structure in the cured material, but also as the microstructure-controlling agent to form a loose structure doped with bulky dopants. We used SEM in order to find to difference of structure, and can calculate the distance of interlayer by XRD analysis. CV test showed oxidation and reduction.
Development of yellow and blue phosphor and their emission properties
Park Soo-Gil,Cho Seong-Ryoul,Son Won-Ken,Lim Kee-Joe,Lee Ju-Seong The Korean Electrochemical Society 1998 한국전기화학회지 Vol.1 No.1
Electroluminescence (EL) comes from the light emission obtained by the electrical excitation energy passing through a phosphor layer undo. an applied high electrical field $(10^6 V/cm)$. The preparation of white and blue phosphors and characterizations of light emitting alternating current powder electroluminescent devices (ACPELDs) were investigated. In this work, we fabricated two kinds of ELDs, that is, yellow electroluminescent device (B-ELD), blue electroluminescent device (B-ELD). The basic st.uctures of Y-ELD and B-ELD are ITO (Indium Tin Oxide)/phosphor layer/Insulator layer/Carbon electrode and ITO/Phosphor layer/Insulating layer/carbon electrode, respectively. Another structures of ITO/Phosphor and Insulator mixture layer/Backelectrode are introduced. EL spectra and luminance of two types of ELDs were measured by changing voltage at fixed frequency 0.4kHz, 1.5kHz. Blue and yellow phosphors prepared in this work show $50cd/m^2\;and\;30cd/m^2$ of luminance at 400Hz, 150V.
종설논문 : 의료법 쌍벌죄 규정에 대한 의료법리학적 문제제기
신은희 ( Eun Hee Shin ),김경원 ( Ken Won Kim ),장우익 ( Woo Ick Jang ),손영수 ( Young Soo Son ) 한국의료윤리학회 2011 한국의료윤리학회지 Vol.14 No.3
The recently revised "Medical Law" in Korea gives rise to at least three questions. First, should doctors be subject to criminal punishment on the grounds that that the "Monopoly Regulation and Fair Trade Act" has not been effective in regulating the circulation of medicine and medical supplies? Second, will the provision of dual punishment in the new law achieve the desired results? Third, will social justice and ethics be promoted through the threat of criminal punishment? In this article we address these questions and argue for the following claims: (1) that the provision of dual punishment in the new law is illegitimate from a jurisprudential point of view, (2) that the provision of dual punishment will impede medical progress, and (3) that the tyranny of the majority and the problem of procedure in lawmaking will hinder the establishment of political justice and respect for the rule of law in Korea. The overall view defended in this article is that doctors and professional medical organizations should be granted autonomy in developing codes of conduct and professional ethics to regulate and promote the practice of medicine in Korea.