http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Ru를 도입한 TiO<sub>2</sub>의 합성과 산소를 이용한 알코올 산화반응 연구
김영용,최명룡,권기영,Kim, Youngyeong,Choi, Myong Yong,Kwon, Ki-Young 한국공업화학회 2014 공업화학 Vol.25 No.6
본 연구에서는 수열합성법을 이용하여, 한단계의 과정으로 $TiO_2$와 Ru (Ruthenium)가 도입된 $TiO_2$ ($Ru_x/TiO_2$)를 합성하였다. 합성된 샘플의 결정성과 조성 및 형태를 X-ray diffraction (XRD)과 energy dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM)를 통하여 확인하였으며, Benzyl alcohol의 Benzaldehyde로의 산화반응에 촉매로서 적용하였다. 높은 선택성을 가지는 산화반응이 진행되었으며, $TiO_2$에 도입된 Ru의 양이 증가할수록 촉매로서의 더 좋은 촉매활성을 보였다. We synthesized $TiO_2$ ($Ru_x/TiO_2$) incorporating $TiO_2$ and Ru via an one-step hydrothermal method. The physical properties were characterized by X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDS) and transmission electron microscopy (TEM). The prepared samples were applied as a catalyst for the oxidation of benzyl alcohol to benzaldehyde using molecular oxygen ($O_2$). Especially, the catalytic activities increased as the contents of ruthenium in $TiO_2$ increased without the formation of any byproducts.
김영용(Young-Yong Kim),박경석(Kyung-Suk Park) 한국경제연구원 2006 한국경제연구원 연구보고서 Vol.2006-08 No.-
Corporations and conglomerates have developed as a form of property rights to internalize the external benefits from commercial activities. In order to successfully internalize the benefits, corporations and conglomerates must reduce both decision-making and external costs that are the most important part of the overall internalization costs. The decision-making costs are reduced by concentrating decision-making authority in the hands of a small number of managers, and external costs that might be imposed on the shareholders are avoided or reduced through stock market transactions. In this regard, conglomerates that consist of affiliated firms have developed with a controlling shareholder whereas no controlling shareholder characterizes M-form conglomerates. Documented empirical observations largely support these findings. Finally, advocates of ‘corporate governance movement’ fail to understand the economic theory underlying the operations of corporations and conglomerates.
김영용(Young-Yong Kim),정문호(Mun-Ho Jeong) 한국전자통신학회 2015 한국전자통신학회 논문지 Vol.10 No.7
이동 로봇 Pan-Tilt 기구부에 장착된 스테레오 카메라의 Head-Eye 보정 및 Wheel 보정을 동시에 수행하는 방법을 제안한다. 카메라가 이동로봇의 고정형 기구부에 장착되어있는 경우를 고려한 기존의 방법들은 최근 일반적인 이러한 시스템에 적용될 수 없다. 이러한 문제점을 해결하기 위하여 본 논문에서는 기존 방법을 바탕으로한 선형 반복적인 방법을 고안하였다. 이것은 동시보정을 통한 효율성뿐만 아니라 정확도 면에서도 만족할만한 결과를 얻었다. 그리고 비선형 최적화 기법을 통해 보다 높은 정확도의 보정을 구현했다. We presented a method to perform simultaneously both head-eye calibration and wheel calibration for a mobile robot that has a stereo camera mounted on the pan-tilt mechanism. Such a mobile robot system prevails recently. However, conventional methods are not applicable to this system because they assumed that camera systems were mounted on fixed structures. Building on conventional methods, we devised an iterative linear solution to solve the problem, and achieved satisfactory results in terms of accuracy in addition to efficiency due to simultaneous calibration. Furthermore, the calibration accuracy was improved by nonlinear optimization.
초등학교에서 환경체험학습이 환경 친화적 행동에 미치는 영향
김영용(Kim Young Yong),송경욱(Song Kyung Wook) 한국실과교육학회 2004 한국실과교육학회지 Vol.17 No.1
This study was carried out to examine the influence of environmental experience learning for the elementary school children on the pro-environmental behavior. The subjects of the study consisted of 250 elementary school children in 5th and 6th grades from two schools in Jeju-do which are situated in very similar natural and cultural circumstances. One of them was designated as the experimental group which took part in environmental experience learning, and the other as the comparative group which performed only classroom-oriented learning. The program for environmental experience learning was made up of the following 4 types of activities: environment exploring activities, environment observing activities, nature experiencing play activities, and making activities with waste materials. The time used for these activities were taken from that for free activities, special activities, tour activities, extra-curricular activities, etc. The results of the study were based on the statistical analysis of the 492 questionnaires obtained from the 250 children questioned twice, before and after the experiment, with 4 invalid questionnaires excluded. They are summarized as follows: Comparing the mean values of the experimental group and the comparative group, it was indicated that the pre-experiment showed slight differences, but the post-experiment showed big differences. In particular, the arrival point of environmental education showed the most significant difference in the section of environment-protective behaviors. The pre and post t-test results of both groups indicated that the experimental group showed significant differences but the comparative group did not. Particularly in the section of environment-protective behaviors, which was probably the visible effect of environmental education, the experimental group showed significant differences in all of the items, but the comparative group showed no significant differences.