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이준석(Joonsuk Lee) 동아대학교 경영문제연구소 2007 經營論叢 Vol.28 No.-
This paper develops a plant location evaluation model in the footwear industry and analyzes key factors of the model, using AHP technique. The empirical results show that tax system is the most important evaluation factor of footwear plant location. The results also indicate that for firms with cost-advantage strategy, labor availability, working hours & wage, labor productivity, and production cost, are ranked as key evaluation factors of footwear plant location. But, for firms with product-differentiation strategy, the other hours, wage economic growth, ability for parts & design development, working hours & wage, and political situation are shown to be the most important evaluation factors of footwear plant location.
관성센서를 이용한 3차원 관성 제스처 입력 시스템 개발
이준석(Joonsuk Lee),이광재(Kwang-Jae Lee) 한국엔터테인먼트산업학회 2010 한국엔터테인먼트산업학회 학술대회 논문집 Vol.6 No.1
본 논문에서는 관성 데이터 입력 장비로 한손에 총 5개의 관성센서를 장착하고, 각 센서에서 입력되는 데이터를 병렬 처리하여 손의 제스처를 인식할 수 있는 시스템을 시뮬레이션 하여, 개발된 3차원 관성 컨트롤러의 성능을 테스트 해보고자 한다. 관성 컨트롤러는 영상 또는 음성 데이터에 비하여 그 자료의 양이 작아 실시간 처리가 가능하며 비교적 정확한 인식 결과를 얻을 수 있다. 개발된 3차원 관성 컨트롤러의 간단한 제스처 인식 테스트를 진행하기 위하여 손가락 제스처 1, 2, 3, 4, 5, 엄지손가락 위로, 엄지손가락 아래로, 손바닥 회전의 8개 동작을 표본으로 하고 간단하게 인식 성능을 확인할 수 있는 K-Means 거리 방법을 이용하여 제스처 인식 테스트를 진행하였다. 8개의 제스처에 대하여 각각 10번씩 데이터 파일을 생성하였으며 전체 제스처에 대한 평균 인식률은 82.5%이며, 인식 시간은 평균 0.41 msec의 결과를 보였다.
Oh, Joonsuk,Lee, Jun-Ho,Koo, Ja Choon,Choi, Hyouk Ryeol,Lee, Youngkwan,Kim, Taesung,Luong, Nguyen Dang,Nam, Jae-Do Royal Society of Chemistry 2010 Journal of materials chemistry Vol.20 No.41
<P>Various functional materials, such as metal nanoparticles, carbon nanotubes and conducting polymers were coated on polymer microspheres finding various uses in electronic and biomedical applications. Herein, we demonstrate that single graphene oxide (GO) sheets could be easily wrapped on amine-functionalized poly(glycidyl methacrylate) (PGMA-ed) microspheres (∼2.5 μm in diameter) to form a PGMA-ed/GO core-shell structure with a thickness of <I>ca.</I> 50 nm. Subsequently, the synthesized GO-skin microspheres were consolidated by heating them to 60 °C to form a robust self-standing paper through the formation of electrostatic and van der Waals attractive forces between the very large surfaces of the GO, together with the formation of hydrogen bonding during the dewatering and drying processes, where the GO skins are interconnected to provide an electrical path and mechanical skeletal structure. When a stabilized GO dispersion was added to the PGMA-ed microspheres, the GO sheets were uniformly self-assembled on the PGMA-ed microsphere surfaces, seemingly through dipole–dipole interactions and amine–epoxide chemical reactions. This approach provides a simple route for the large volume production of PGMA-ed/GO core-shell microspheres and large-sized self-standing paper that may find various uses in optoelectronic device materials and porous membrane applications.</P> <P>Graphic Abstract</P><P>A highly porous and flexible graphene oxide porous paper was prepared through self-assembly of graphene oxide sheets located on surfaces of amine-functionalized poly(glycidyl methacrylate) (PGMA-ed) microspheres. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c0jm00107d'> </P>
Attenuation Effects of Plasma on Ka-Band Wave Propagation in Various Gas and Pressure Environments
Joo Hwan Lee,Joonsuk Kim,Yuna Kim,Sangin Kim,Doo-Soo Kim,Yongshik Lee,Jong-Gwan Yook 한국전자파학회JEES 2018 Journal of Electromagnetic Engineering and Science Vol.18 No.1
This work demonstrates attenuation effects of plasma on waves propagating in the 26.5–40 GHz range. The effect is investigated via experiments measuring the transmission between two Ka-band horn antennas set 30 cm apart. A dielectric-barrier-discharge (DBD) plasma generator with a size of 200 mm × 100 mm × 70 mm and consisting of 20 layers of electrodes is placed between the two antennas. The DBD generator is placed in a 400 mm × 300 mm × 400 mm acrylic chamber so that the experiments can be performed for plasma generated under various conditions of gas and pressure, for instance, in air, Ar, and He environments at 0.001, 0.05, and 1 atm of pressure. Attenuation is calculated by the difference in the transmission level, with and without plasma, which is generated with a bias voltage of 20 kV in the 0.1–1.4 kHz range. Results show that the attenuation varies from 0.05 dB/m to 9.0 dB/m depending on the environment. Noble gas environments show higher levels of attenuation than air, and He is lossier than Ar. In all gas environments, attenuation increases as pressure increases. Finally, electromagnetic models of plasmas generated in various conditions are provided.
가솔린 연료 개질 기술을 이용한 SI 엔진 열효율 향상
이승우(Seung Woo Lee),백홍길(Hong-kil Baek),오희창(Heechang Oh),이종혁(Jonghyeok Lee),정진영(Jinyoung Jung),김준석(Joonsuk Kim),송순호(Soonho Song),전광민(Kwang Min Chun) 한국자동차공학회 2018 한국자동차공학회 부문종합 학술대회 Vol.2018 No.6
A well-known effective way to improve SI engine thermal efficiency is to use hydrogen mixed with gasoline. Hydrogen, even in small amounts, it makes flame speed faster, knock mitigation and improves combustion stability. These benefits enable higher compression ratios, higher EGR rates and improved SI engine thermal efficiency. Fuel reforming is one way to get hydrogen from the internal combustion engine, using hydrocarbon fuel, exhaust gas steam and heat, hydrogen reformation is achieved using species already available in the exhaust gas. However, for steam reforming to be valuable, the catalyst temperature should be above its light off temperature under engine operating condition. This study investigates how the combustion characteristics are affected by the addition of reformed hydrogen in the presence of EGR on a 4 cylinder turbo gasoline direct injection (TGDI) engine. It is in the current research that the combustion speed is increased when hydrogen from on-board fuel reforming system is supplied into combustion chamber by means of EGR gas. It is also found that total engine fuel consumption is improved with EGR limit expansion and knock mitigation. And it is confirmed that catalyst degradation should be prevented under real engine operating condition for serial production.
Dae Ryun Chang,Hosun Lee,Joonsuk Jang 글로벌지식마케팅경영학회 2016 Global Marketing Conference Vol.2016 No.7
This research aims to look at the contradictory effects of corporate social responsibility as conducted by luxury brands. On the one hand, corporate social responsibility (CSR) is known to product positive effects on brands such as the transfer of goodwill and image but on the other hand because of the purported impact of disfluency, previous research has argued that the emphasis on self enhancement runs counter to the more social agenda of CSR. In this study we examine of power and how that can mediate when positive and negative impact of CSR when such campaigns are implemented by luxury brands.