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유연하고 얇은 알루미늄 포일을 사용한 다공성 알루미나 막 제작
박영옥,김승우,고태준,Park, Young-Ok,Kim, Seung-Woo,Kouh, Tae-Joon 한국자기학회 2007 韓國磁氣學會誌 Vol.17 No.2
유연하고 얇은 0.025 mm와 0.2 mm의 두께를 지닌 알루미늄 포일을 사용하여 다공성 알루미나 막을 제작하였다. 알루미늄 포일들은 에탄올/과염소산 용액에서 전해연마하여 표면처리를 하였으며, 0.3 M의 옥살산 용액 안에서 양극산화 시켰다. 양극산학 시용액의 온도는 $9^{\circ}C$로 유지시켰으며, 전극에 가해주는 전압을 0.4와 40 V 사이에서 변화시킨 후, 형성된 알루미나 막의 표면을 주사전자현미경으로 관찰하였다. 관찰 결과, 장시간의 양극 산화 시 사용되는 전압의 크기가 1 V 이상일 경우 강한 전기분해 반응으로 인해 생성된 산화막 표면이 파괴되어 있음을 확인할 수 있었다. 반면 1 V 이하로 처리할 경우, 장시간에 걸쳐 안정적으로 양극산화시킬 수 있음을 알 수 있었다. 이 실험을 통해 얇은 알루미늄 포일의 경우 두꺼운 알루미늄 판과 달리 장시간의 양극산화를 통해 다공성 알루미나 막을 형성하기 위해선 1 V 이하의 낮은 전압이 요구되는 것을 확인할 수 있었다. We have fabricated porous aluminum oxide using flexible and thin aluminum foils with thickness of 0.025 and 0.2 mm. These foils were anodized with 0.3 M oxalic acid solution after being electropolished with ethanol/perchloric acid. During the anodization, the temperature of the electrolyte was maintained at $9^{\circ}C$ and the anodization voltage was varied between 0.4 and 40 V The surface of the anodized aluminum oxide was studied with a scanning electron microscope. From the scanning electron micrograph, we observed that when the voltage applied was above 1 V for a long period of time, due to a strong electrolysis reaction in electrolyte, the surface of the anodized oxide was destroyed. However, when the anodization voltage was less than 1 V, the anodization process was very stable and lasted much longer. Our results show that for a thin aluminum foil, unlike a thick plate, one requires small anodization voltage less than 1 V to form a porous aluminum oxide for long anodization time.
초등학교도서관 축제의 활성화 방안 - 서울지역을 중심으로 -
박영옥,김양우,Park, Young-Auk,Kim, Yang-Woo 한국비블리아학회 2012 한국비블리아학회지 Vol.23 No.2
본 연구에서는 서울지역 교육복지투자우선지원학교에서 실시하고 있는 학교도서관 축제를 조사 분석하였다. 즉 학교도서관 축제에 참여하고 있는 도서관 담당자, 학생들을 대상으로 설문 및 면담조사를 실시하여 축제의 다양한 특성을 분석하였다. 구체적인 분석내용은 다음과 같이 요약될 수 있다. 즉 조사 대상 학교도서관 축제 프로그램의 주요특성 및 내용, 십진분류기호의 축제에 대한 영향, 축제와 도서관심도의 변화, 학교도서관 축제에 대한 도서관 담당자 및 학생의 만족도, 학교도서관 축제에 대한 문제점 조사 등을 포함한다. 조사결과를 토대로 학교도서관 축제 활성화를 위한 주요 제언점을 제시하였다. This study surveyed and analyzed school library festival that is being carried out in elementary schools of Seoul region. In doing so, it carried out questionnaire and interview survey targeting people in charge of library and students who are participating in the school library festival. The findings can be summarized with such components as follows. Major characteristics of the programs of the school library festival, the impact of Decimal Classification on the festival, change of participants' interest in book, the satisfaction of library staff and students are included. Based on the findings, major suggestions were made on activation of the school library festival.
흡수제 내부순환형 탈황장치의 SO<sub>2</sub> 제거성능 특성
박영옥,박현진,김용하,Park, Young-Ok,Park, Hyun-Jin,Kim, Yong-Ha 한국대기환경학회 2011 한국대기환경학회지 Vol.27 No.6
Three new granular absorbents were prepared from calcium hydroxide, and applied to an FGD process with internal circulation. The aim of the study was finding the most efficient of the these three applied absorbents for the $SO_2$ removal at high flue gas temperatures. The absorbent is fed to the testing unit at high operation temperature and fluidized inside the FGD system where the sorbent particles react with the $SO_2$ gas. The rate of $SO_2$ decomposition was high in C-type absorbent which had the large surface area. De-SOx characteristics of the current absorbents appeared to be similar to the other conventional agents in this fluidized bed combustor. In particular, the optimum de-SOx condition could be achieved at high mole ratios of Ca to S which can reduce the residual $SO_2$.
유리섬유 여과포에 의한 석탄회 포집 1 . 분진층 형성과 압력손실 특성
박영옥,김영성,손재익,정태수 ( Young Ok Park,Young Sung Ghim,Jae Ek Son,Tai Soo Chung ) 한국화학공학회 1991 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.29 No.4
Collections of coal fly ash by high-temperature glassfiber fabrics were tested aiming at control of particulates from industrial coal-fired boilers. Growth of dust deposition and pressure drop were investigated by varying filtration velocity and dust loading at a bench-scale test unit. Characteristics of fabrics recently developed by Kangnam Ind. Co. (KN-448) were compared by those of imported fabrics manufactured by Burlington Glass Fabrics Co. (BT-448). Pores of KN-448 were not so complete and uniform as those of BT-448 and pressure drop across KN-448 was lower than that across BT-448. However relative difference of pressure drops between the two fabrics was reduced with increasing dust loading.
박영옥,정기화,김재완,Park, Young-Ock,Chung, Ki-Hwa,Kim, Jae-Wan 한국약제학회 1974 Journal of Pharmaceutical Investigation Vol.4 No.1
The comparative studies were made on the analgesic antipyretic effects of aminopyrine used individually and combined with parasympathetic agents (atropine sulfate). The analgesic antipyretic effects were eximined by Writhing's method to the experimental groups(mouse), and the following effects were found : 1) The active intensity of aminopyrine by it's oral administration combined with atropine sulfate is as follows. Amiinopyrine 80 mg/kg combided with Atropine sulfate 0.005 mg/kg=Aminopyrine 100 mg/kg 2) The most active range of intensity of Atropine sulfate(adjuvant) by it's oral administration is as follows. Atropine sulfate $0.004{\sim}0.005\;mg/kg$.