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최수아,강홍재,Choi, Su A,Kang, Hong Jae 영남수학회 2016 East Asian mathematical journal Vol.32 No.4
The aim of this study was to observe processes and implication to a given program for the 20 gifted children grade 5 by making the number from 1 to 100 with natural numbers 4,4,9 and 9. Revelation of creativity, mathematical tendency of students and meaningful responses were observed by the qualitative records of this game activity and the analysis of result. The major result of a study is as follows: The mathematical creativities of students were revealed and developed by this activity. And the mathematical attitude were changed and developed, so student could actively participate. And students could experience collaborative and social composition learning by presentations and discussion, competition with a permissive atmosphere and open-game rule. It was meaningful that mathematical ideas (negative number, square root, factorial, [x]: the largest integer not greater than x, absolute value, percent, exponent, logarithm etc.) were suggested and motivated by students themselves.
최수아 ( Choi Su A ) 아시아문화학술원 2017 인문사회 21 Vol.8 No.2
본 논문은 상담에서 전문가가 그 경계를 넘어 윤리를 위반하게 되는 과정을 밝히는 것으로 다중관계 안에서 “경계의 문제”에 초점을 맞추었다. 이를 위해 전문가의 기본 윤리적 의식의 토대가 되는 윤리의 의미와 네 가지 도덕적 원리들을 살펴보았고, “경계문제”와 관련한 개념 및 경계에 대한 다양한 학자들 간의 쟁점과 사례들을 살펴보았다. 이를 통해 전문가는 지켜야 할 가장 중요한 “경계”의 문제를 관리하고 다룰 수 있게 되며, 내담자의 권익을 존중하고 해를 줄이기 위한 자원을 확대함으로써, 전문가의 윤리적 인식을 높이도록 도움이 되는 것에 본 논문의 시사점이 있다. This study aimed to reveal the process that professionals violate ethics beyond their boundaries and focused on the boundary issues in multiple relationships. To this end, this study examined the meaning of ethics and the four ethical principles that underpinned the basic ethical consciousness of the experts. It also examined cases and issues among various researchers about the concepts of boundary and boundary issues. This study would have significance in that it enabled professionals to manage and deal with significant boundaries issues and it helped to increase the ethical awareness of professionals by respecting the interests of clients and expanding resources to reduce harm.
단보 : 모세관 현상에 의한 토양 환경에서의 지하수 거동에 관한 연구
최수아 ( Su A Choi ),최은진 ( Eun Jin Choi ),김동수 ( Dong Su Kim ) 한국물환경학회 2011 한국물환경학회지 Vol.27 No.1
The mobility of groundwater in the soil environment has an important role in the soil environment and absorption of plant. Therefore, studies on the mobility of groundwater considering the physical and chemical properties of soil is very important. In this study, movement of water due to change in soil particle size were observed by capillary rise. The height of the capillaries was measured according to capillary diameter, temperature and solution concentration. The inner diameter of each capillary itself is 0.012, 0.016, 0.024, 0.027 cm, and experiments were performed at 22°C. As a result, the height of the capillaries decreased with increasing capillary diameter, and the solution temperature but increased with increasing concentration. Changes in the height of the capillaries are interpreted to related with surface tension by the Young-Laplace equation. Also on the mobility of groundwater, the increase of water and soil temperatures can be significant factors caused by ion strength and global warming as well as pores in the soil particles. The results of this study is considered to provide the basic data on the behavior of groundwater in the soil environment.
질소 도핑 TiO<sub>2</sub>의 Methylene Blue 광분해 제거에의 적용
백미화,최수아,김동수,Baek, Mi-Hwa,Choi, Su-A,Kim, Dong-Su 한국물환경학회 2010 한국물환경학회지 Vol.26 No.4
Nitrogen-doped $TiO_2$ particles have been successfully prepared using titanium tetraisopropoxide as the Ti source and urea as the nitrogen source. As-prepared nitrogen-doped $TiO_2$ was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Brunauer-Emmett-Teller method (BET) and ultraviolet-visible light (UV-vis) absorption spectra techniques. Photocatalytic degradation of Methylene Blue (MB) has been carried out in both solar light (UV-vis) and the visible region (${\lambda}=420nm$). Nitrogen-doped $TiO_2$ exhibits higher activity than the commercial $TiO_2$ photocalyst, particularly under visible-light irradiation because bandgap of nitrogen-doped $TiO_2$ becomes remarkably decreased.