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Keunwoo Lee,전형탁,Jeongtae Kim,Keunjun Kim,Seungjin Yeom,Youngjin Lee 한국물리학회 2007 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.50 No.4
Co films deposited by using a remote plasma atomic layer deposition (RPALD) method with cyclopentadienyl cobalt dicarbonyl (CpCo(CO)2) as a precursor were investigated. The process parameters, such as the deposition temperature, the plasma power, the process pressure, and the plasma gas, were varied, and the resulting Co films were characterized. The growth rate of the Co film was about 1.1 °A/cycle for a process window between 125 and 175 C. The impurity content of the Co films was minimized using a H2 plasma in the process pressure range between 0.1 and 2 Torr at a plasma power of 300 W. The carbon and the oxygen contents of the Co films were about 7 at.% and below 1 at.%, the detection limit, respectively. The Co films showed a very uniform surface with a root-mean-square (RMS) roughness of 1.51 °A, as determined by using an atomic force microscopy (AFM) analysis. The Co films deposited on contact holes, about 0.12 μm wide and 1.8 μm deep, showed excellent conformal coverage. The compositions of the Co films on the tops and the sidewalls of the contact holes were examined with Auger electron spectroscopy (AES), and the results showed nearly identical compositions.
A Mono-To-Stereo Upmixing Algorithm Based on the Harmonic-Percussive Separation
Keunwoo Choi(최근우) 한국방송·미디어공학회 2013 한국방송공학회 학술발표대회 논문집 Vol.2013 No.6
In this research, a mono-to-stereo upmixing algorithm based on music source separation is proposed. For the upmixing, a harmonic and percussive separation for jazz music is implemented. Then, the sources are re-panned by equalizing the loudness of left and right sides of listeners in the one proposed approach. In the other approach, the harmonic sources are spread by a decorrelator while the percussive sources are panned to the center. In the experiments, the re-panning algorithm showed advanced performance in terms of localization and timbral quality.
Design of acceleration feedback of UGV using a Stewart platform
Keunwoo Park,Eunhye Youn,Sunbum Kim,Yeonsu Kim,Geehyuk Lee 제어로봇시스템학회 2021 제어로봇시스템학회 국제학술대회 논문집 Vol.2021 No.10
A fast-speed Unmanned Ground Vehicle (UGV) is utilized for logistics or carrying casualties in dangerous environments, substituting humans. Controlling the UGV’s acceleration is essential for a human operator concerning stability. However, it is not possible to recognize the accurate acceleration of UGV only with visual information. We designed haptic feedback using a Stewart platform for a pilot to control a UGV’s acceleration and verified its effect through a user study. The result showed that a user with haptic feedback could drive a UGV with less acceleration on rough terrain than without haptic feedback.
남근우(Keunwoo Nam) 한국정치학회 2010 한국정치학회보 Vol.44 No.4
이 글은 1959년 12월부터 1984년까지 실시된 귀국사업을 재조명하는 연구로서 귀국사업에 내재된 북한의 경제적 의도를 규명하고 귀국사업이 북한 경제체제에 어떤 영향을 끼쳤는지 그 결과를 분석하는 것을 목적으로 한다. 귀국사업과 관련된 연구는 많으나 귀국과정이나 피상적인 측면에서 북한의 정치경제적 의도를 규명하는 선에 머무르고 있는 것이 사실이다. 그나마도 귀국사업만을 대상으로 한 연구는 매우 적으며 그것도 국내보다는 일본에서 연구가 더 활발한 실정이다. 특히, 국내 정치학과 국제정치학 분야에서 귀국사업 연구는 찾아보기 어려운 것도 현실이다. 따라서 이 글은 기존 귀국사업 연구에서 빠져 있는 부분을 북한과 일본자료 및 인터뷰자료를 활용하여 찾아내고 귀국사업에 깊숙이 개입한 북한의 경제적 의도와 귀국사업의 경제적 결과를 분석한다. 이를 통하여 귀국사업은 북한이 당시 당면한 경제적 위기를 극복하기 위한 현실적인 경제처방이었음을 밝힌다. 귀국사업을 재조명함으로써 북한 경제체제의 취약성의 여러 근원 가운데 하나를 찾아낼 수 있을 것이다. This thesis examines the homecoming project of North Korea during the period of December 1959 through 1984. The purpose of this study is to identify economic intentions of North Korea relating to the homecoming project and its impact on the North Korean economy. Though there have been a lot of studies on the North Korean project, they mainly dealt with processes of homecoming or superficial aspects of its political and financial intentions. There are a few cases focusing only on homecoming itself. Most studies have been conducted in Japan rather than Korea. Therefore, it is not so easy to find research on this subject in the fields of domestic and international politics. This study searches for the missing parts of the homecoming project through a number of interviews and documents found in Japan and North Korea to understand the economic intentions of North Korea. The results show that one of the main goals of North Korea in the homecoming project was to overcome its economic crisis at the time the project was planned.