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우상희,Jae-In Lee,Jong Bum Kim,Gwi-Nam Bae,이승복,Se-Jin Yook,Youhwan Shin 대한기계학회 2020 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.34 No.3
The air pollution level of particulate matters in subway tunnel environments is severe. The present study conducted experimental measurements and analyses on dustcollection efficiencies and ozone emission rates in a lab-scale wind tunnel to determine a high-voltage electrode shape suitable for an electrostatic precipitator to remove airborne particles in subway tunnels. Six high-voltage electrode shapes (saw-type, few-saw-type, short-saw-type, tree-type, wave-type, and spike-type) were tested. The results indicate that while breakdown voltage of the spike-type high-voltage electrode was 66 % of other electrode shapes, its dust-collection efficiency per unit voltage was similar to that of other electrode shapes. However, the dust-collection efficiency per unit of power in the spike-type highvoltage electrode was significantly low. Moreover, the wave-type high-voltage electrode shape had 20 % lower dust-collection efficiency than the saw-type and tree-type high-voltage electrode shapes under conditions of low voltage and high flow velocities. Ozone emission rates for all shapes increased proportionally to the electric current. However, ozone emission rates for each high-voltage electrode shape are varied as 12-23 mg/s per mA. The saw-type and tree-type high-voltage electrode shapes were superior in terms of dust collection, 90 % collection efficiency was shown at about 1.5 W/(m/s) 2 . The saw-type had a lower ozone emission rate (16.4 mg/s per mA) than the tree-type (19.6 mg/s per mA). Thus, the saw-type shape was the most suitable as a high-voltage electrode in the electrostatic precipitator for removing airborne particles in a subway. The results also indicate that both dust-collection efficiencies and ozone emission rates should be evaluated concurrently when evaluating electrostatic precipitator high-voltage electrodes.
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우상희,김종범,박통일,육세진,권순박,배귀남,Woo, Sang-Hee,Kim, Jong Bum,Park, Tong-Il,Yook, Se-Jin,Kwon, Soon Bark,Bae, Gwi-Nam 한국입자에어로졸학회 2016 Particle and Aerosol Research Vol.12 No.1
A large amount of wear dust generated during train operation is a major dust source in urban railway tunnels. To check possibility of a louver dust collector for the removal of dust in the railway tunnel, five louver dust collector models were designed and their performance was tested in a wind tunnel. JIS Z 8901 Class 8 dust was used as a test dust. Pressure drop and particle collection efficiency were evaluated with the face velocity ranging from 1 m/s to 4 m/s. At this low velocity range, particle collection efficiency of the louver dust collector was found to be insensitive to air velocity and design parameters. Pressure drop was under 40 Pa, and $PM_{10}$ and $PM_{2.5}$ collection efficiencies were approximately 50% and 30%, respectively.
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우상희,김재희,예우양,이영하,Woo, Sang-Hee,Kim, Jae-Hee,Ni, Yu-Yang,Rhee, Young-Ha The Microbiological Society of Korea 2012 미생물학회지 Vol.48 No.3
활성슬러지로부터 특이한 조성의 polyhydroxyalkanoates (PHAs)를 생합성하는 Pseudomonas aeruginosa P-5를 분리하였다. 이 균주는 nonanoic acid나 heptanoic acid와 같은 홀수개의 탄소수를 가지는 지방산을 단일 탄소원으로 공급해주었을 경우, 3-hydroxyvalerate (3HV)와 medium-chain-length (MCL) 3-hydroxyalkanoates 단위체로 이루어진 공중합체를 생산하였다. 공중합체 내 3HV의 함량은 valeric acid와 같은 보조기질을 공급함으로써 증가시킬 수 있었으며, 2 g/L nonanoic acid와 1 g/L valeric acid로 이루어진 혼합기질로부터 3HV의 함량이 26 mol%에 달하는 공중합체를 얻을 수 있었다. 이러한 공중합체는 결정성이 매우 낮아 점착성 고분자로서의 성질을 보였다. P. aeruginosa P-5 균주는 MCL-PHA synthase 유전자(phaC1, phaC2)를 가지고 있는 반면에 SCL-PHA synthase 유전자는 결여되어 있는 것으로 나타났다. 따라서 P. aeruginosa P-5 균주의 MCL-PHA synthase는 MCL(R)-3-hydroxyacyl-CoAs 뿐만 아니라 (R)-3-hydroxyvaleryl-CoA를 기질로 인지하는 특이한 기질특이성을 갖는 것으로 사료된다. A bacterial strain capable of synthesizing polyhydroxyalkanoates (PHAs) with an unusual pattern of monomer units was isolated from activated sludge using the enrichment culture technique. The organism, identified as Pseudomonas aeruginosa P-5, produced polyesters consisting of 3-hydroxyvalerate and medium-chain-length (MCL) 3-hydroxyalkanoate monomer units when $C_{-odd}$ alkanoic acids such as nonanoic acid and heptanoic acid were fed as the sole carbon source. Solvent fractionation experiments using chloroform and hexane revealed that the 3-hydroxyalkanoate monomer units in these polyesters were copolymerized. The molar concentration of 3-hydroxyvalerate in the polyesters produced were significantly elevated up to 26 mol% by adding 1.0 g/L valeric acid as the cosubstrate. These copolyesters were sticky with low degrees of crystallinity. The PHA synthase genes were cloned, and the deduced amino acid sequences were determined. P. aeruginosa P-5 possessed genes encoding MCL-PHA synthases (PhaC1 and PhaC2) but lacked the short-chain-length PHA synthase gene, suggesting that the MCL-PHA synthases from P. aeruginosa P-5 are uniquely active for polymerizing (R)-3-hydroxyvaleryl-CoA as well as MCL (R)-3-hydroxyacyl-CoAs.
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우상희 한양대학교 우리춤연구소 2023 우리춤과 과학기술 Vol.19 No.3
Jakbeopmu(作法舞) refers to the ritual practices performed in the reenactment of Korean Buddhist ceremonies. Originally, early Buddhism distanced itself from ritualistic dances and performances however, Jakbeopmu is distinct in its purpose and essence from secular dances. that’s reason why Jakbeopmu has become entrenched in Buddhist rituals. Through bodily movements such as Bara Dance, Butterfly Dance, and Beopgo Dance, which symbolize the joy and spiritual heat attained through Buddhist rituals, Jakbeopmu plays a role in elevating one’s own mind as well as the minds of those who witness it, purifying them and guiding them towards the realm of spiritual heat. Consequently, it is named Jakbeop, which means "creating the dharma." In addition to the profound meaning of reverence for Buddhas and Bodhisattvas and the act of offering spiritual merit, Jakbeopmu also holds great value as a method of practice for the performer. It incorporates breathing techniques utilized in yoga and meditation, and through the cultivation of movements and gestures, ultimately culminates in the expression of unity in the state of Sammae, where the individual and the whole become one. Thus, the practice of Jakbeopmu inherently encompasses a methodology of practice. Furthermore, the performance of Jakbeopmu is rooted in the spirit of Mahayana Bodhisattvas. By assuming a transformative role within the reenactment, it enables the realization of both the deceased and the living, leading them to the realm of truth through its gestures. This represents a core belief of Mahayana Buddhism and is a fundamental purpose of the reenactment. Therefore, in this study, the interpretation of texts such as the Yumagyeong(維摩經),Yukjodangyeong(六祖壇經), Jijangbosalbonwongyeong(地藏菩薩本願經) and the text of rituals through the lens of practice and liberation will be employed to support the argument about the significance practice of Jakbeopmu as an act of Mahayana Bodhisattva practice. 작법무란 한국 불교의 재의식에서 설행하는 의식무를 말한다. 본래 초기 불교의 승단은 계율상 가무를 멀리하였지만, 작법무는 세속의 춤과는 그 목적과 본질이 엄연히 다르기 때문에 불교의 재의식 안에 자리를 잡을 수 있었다. 불교의식을 통해 얻은 법열과 환희심을 바라춤․나비춤․법고춤 등을 통한 몸짓으로 승화시켜 자신은 물론 보는 이의 마음까지도 청정케 하고 나아가 법열의 세계로 인도하는 역할을 하기에 작법(作法): ‘법을 짓는다’이라 명명하게 되었다. 이러한 작법무는 불․보살의 찬탄과 신업공양의 의미, 더불어 수행자의 수행의 방편으로서의 가치도 높다. 요가나 명상에서 활용되는 호흡법이 적용되며 동작과 범패의 수련을 거쳐 궁극적으로는 삼매에 들어 물아일체의 경지에서 표출되는 춤사위이기에 작법무 자체에 이미 수행의 방법론이 내포되어 있다. 또한, 작법무의 설행은 자리이타행 즉 대승보살도의 정신을 근간으로 한다. 자신의 깨달음에 머물지 않고 재의식 안에서 교화적 역할을 함으로써 그 몸짓으로 죽은 사람과 산사람 일체중생 모두를 깨닫게 하여 진리의 세계로 이끌 수 있는 힘이 있다. 이는 대승불교의 핵심사상이며 재의식이 추구하는 목적이기도 하다. 따라서 본 연구에서는 위와 같은 주장을 뒷받침하기 위해 유마경, 육조단경, 지장보살본원경, 재의식 염불문 등의 해석을 통해 작법무를 수행적, 해탈적 관점에서 그 본질과 사상을 바르게 이해하고 작법무가 대승보살행으로서 갖는 의의를 밝히는 것에 목적을 둔다.
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우상희,윤성원,조대현 한국음악응용학회 2019 음악응용연구 Vol.11 No.-
이 연구의 목적은 플립러닝을 활용한 음악감상수업의 적용이다. 연구의 목적을 이루기 위해 연구자는 이론적 배경을 마련하였다. 이론적 배경에서는 음악감상수업에 관한 고찰, 플립러닝에 관한 고찰, 타교과 수업에서 플립러닝을 활용한 사례를 고찰하였다. 타교과 수업에서 플립러닝을 활용한 사례의 고찰은 연구를 진행하면서 검색한 301편의 타 교과에서의 사례에서 8편의 사례를 엄선한 것이었다. 그리고 연구된 8편의 사례에서 장점만을 선별하였고, 연구결과에서 플립러닝을 활용한 음악감상수업의 설계에 반영하였다. 플립러닝의 수업 기법은 수업 전(교실-밖-학습), 수업 중(교실-안-활동), 수업 후(교실-밖-학습)로 구성하였으며, 음악감상수업은 내용에 따라 음악을 수 용하고 사고하며 음악에 대한 생각과 느낌을 표현하는 단계, 음악적 감수성과 이해와 공감을 바 탕으로 소통 능력을 기르는 단계로 구성하였다. 이를 정리하면 다음과 같다. 첫째, 이 연구는 음 악감상수업이 소극적으로 이루어지고 있는 문제점을 해결하기 위하여 플립러닝 교수 기법을 활 용하였다. 둘째, 플립러닝을 활용한 음악감상수업을 통해 학습자들이 능동적이고 활동적으로 참 여할 수 있도록 적용 방안을 제시하였다. 이에 이 연구에서는 다음과 같이 제언한다. 첫째, 플립 러닝 수업에 적합한 학교 시스템을 갖출 필요가 있다. 둘째, ICT 활용을 위한 교사와 학생의 소양 교육이 이루어질 필요가 있다. The purpose of this study is to apply flipped learning to music appreciation lessons. For this purpose, the investigator established a theoretical background, which covered music appreciation lessons, flipped learning, and its utilization cases in lessons of other subjects. The investigator came across 301 cases of flipped learning used in lessons of other subjects in the research process and selected eight carefully. Their advantages were identified and reflected in the design of flipped learning-based music appreciation lessons. Flipped learning-based lesson techniques were divided before lessons(learning outside the classroom), during lessons(activities inside the classroom), and after lessons(learning outside the classroom). Music appreciation lessons were organized in two stages: one concerned accepting music and thinking according to content and expressing ideas and feelings about music, and the other concerned the cultivation of communication skills based on musical sensitivity, understanding and empathy. The findings were as follows: first, the study applied the teaching techniques based on flipped learning to solve the problems around passive music appreciation lessons; and second, the study proposed application plans so that students could take aggressive and active part in flipped learning-based music appreciation lessons. Based on these findings, the study proposed a need to install a school system fit for flipped learning-based lessons and provide teachers and students with ICT literacy education to promote their utilization of ICT.
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