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金有燮 서울大學校保健大學院 1975 公衆保健雜誌 Vol.12 No.1
The survey on sports activities after regular class was conducted for 15 days from August 1 through August 15, 1974 for 900 boy and girl students of middle schools located in Kwang Ju City. The results obtained are as followed: 1. More than half of boys and about one third of girls had sports activities after the regular class. 2. As for the kings of sports, 46.6% of boys played soccer, and 40.4% of girls gymnastics. 3. For the sports activities, 52.2% of boys and 62.2% of girls spent less than 2hours per week. 4. The correlation between the length of time for the sports and the grade achievement did not show any statistical significance. 5. As for the place being used for the sports, 64.5 ground and their own home respectively. 6. The main reason why they had the sports activities was for their health. 7. For the sports activies, 46.8% of the students felt deficiencies of facilities and 22.4% their leader. About two-third of the students pointed out the deficiency of facilities and leader. 8. As for the interest of their parents in the sports activities 53.3% of the parents showed cooperative attitude, however, the majority of the parents showed indifference. 9. More than one third of boys and half of girls never participated to the sports activities because of lack of interests. 10. Sixty-six percent of boys, however, were willing to join the sports activites in the future.
金有燮,裵哲雄 圓光大學校 附設 體力科學硏究所 1998 體力科學硏究 Vol.21 No.-
In order to Know smoking status of high school teachers, this survey was conducted on 166 male teachers while in high school within K city and C province. 1. Among 166 male teachers, 94 persons (56.63%) was habitually smoking, liberal arts and social science was 56.99%, natural science was 53.06% and music, art and physical education was 62.50%. 2. A time of fist smoking, 55.32% of smokers was while at college, motive of first smoking 31.92% of smokers was due to curiosity. 3. The most favorite brand of cigarette was Simple (34.04%), smoking quantity in a day 44.4% of smokers smoked 16-20 pieces. 4. 72.34% of smokers had experience of quitting smoking, 63.83% of smokers will quit smoking in future. 5. Cognition about hamfulness of smoking, 62.77% of smokers knowed in a practical manner, 18.09% of knowed through the mass media. 6. On the degree of knowledge about harmful ingredient of cigarette, 94.68% of smokers knowed the cancer of the lung, 75.53% of them knowed the reduction of life expectancy, 56.38% of them knowed the tar, 56.38% of them knowed the disturbance of brain funtion, 51.06% of them knowed the easing of strain.
다중 에이전트 Q-학습 구조에 기반한 주식 매매 시스템의 최적화
김유섭,이재원,이종우,Kim, Yu-Seop,Lee, Jae-Won,Lee, Jong-Woo 한국정보처리학회 2004 정보처리학회논문지B Vol.11 No.2
본 논문은 주식 매매 시스템을 위한 강화 학습 구조를 제시한다. 매매 시스템에 사용되는 매개변수들은 Q-학습 알고리즘에 의하여 최적화되고, 인공 신경망이 값의 근사치를 구하기 위하여 활용된다 이 구조에서는 서로 유기적으로 협업하는 다중 에이전트를 이용하여 전역적인 추세 예측과 부분적인 매매 전략을 통합하여 개선된 매매 성능을 가능하게 한다. 에이전트들은 서로 통신하여 훈련 에피소드와 학습된 정책을 서로 공유하는데, 이 때 전통적인 Q-학습의 모든 골격을 유지한다. 실험을 통하여, KOSPI 200에서는 제안된 구조에 기반 한 매매 시스템을 통하여 시장 평균 수익률을 상회하며 동시에 상당한 이익을 창출하는 것을 확인하였다. 게다가 위험 관리의 측면에서도 본 시스템은 교사 학습(supervised teaming)에 의하여 훈련된 시스템에 비하여 더 뛰어난 성능을 보여주었다. This paper presents a reinforcement learning framework for stock trading systems. Trading system parameters are optimized by Q-learning algorithm and neural networks are adopted for value approximation. In this framework, cooperative multiple agents are used to efficiently integrate global trend prediction and local trading strategy for obtaining better trading performance. Agents Communicate With Others Sharing training episodes and learned policies, while keeping the overall scheme of conventional Q-learning. Experimental results on KOSPI 200 show that a trading system based on the proposed framework outperforms the market average and makes appreciable profits. Furthermore, in view of risk management, the system is superior to a system trained by supervised learning.