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김대광,이형주,안원찬,김홍건,곽이구 한국물리학회 2018 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.72 No.9
The effect of laminar flow fluctuation on the indium composition of In0.07GaAs quantum wells was investigated in order to obtain a higher output power from infrared lighting-emitting diodes (IR-LEDs) having a 940-nm wavelength. By controlling the injection pressure, we obtained various laminar flow conditions. Through subsequent photoluminescence (PL) and X-ray diffraction (XRD) measurements, a noticeable improvement in the optical and the crystalline characteristics of the In0.07GaAs quantum wells was observed at an optimum laminar flow. This result could be attributed to a reduction of non-crystallization in InGaAs quantum wells that had their indium composition improved via the optimized laminar flow. Overall, a significantly improved output power (11.2 mW) was obtained from a 940-nm IR-LED chip fabricated at an optimum laminar flow of 500 sccm, and a remarkable increase of approximately 250% was displayed compared to a conventional chip (3.9 mW) fabricated at a laminar flow of 100 sccm.
김대광,백윤일,서아람,이덕영 한국체육정책학회 2011 한국체육정책학회지 Vol.9 No.1
The purpose of this study was to examine ways of expediting the Korean-style advancement of school sports teams in a bid to revitalize school physical education to help resolve overall problems with elite sports. After an interview survey was conducted, the following findings were given:First, elite sports shouldn't merely be led by some superb players. Short-term and long-term plans should be prepared to discover and foster students who have great potential as players in various sporting events, and the government should offer more intensive assistance to school sports teams. Second, in order to facilitate the advancement of school sports teams in a manner to suit Korean circumstances, the right awareness of the ideal image of a student player that the government lately tried to build is required. That will contribute to creating a good sport culture, which will, in turn, serve to accelerate the advancement of school sports teams. Good learning environments should be prepared, and the local educational authorities should be empowered to assume the responsibility for the management of student players. Besides, it's needed to strengthen the ties among student players, their parents, school instructors and administrators. Third, two government agencies concerned, which are the Ministry of Education,Science & Technology and the Ministry of Culture, Sports & Tourism, should make concerted efforts to revitalize elementary and secondary school physical education and push ahead with a plan of building an advanced operating system of school sports teams. To make it happen, the government agencies should set up a new department responsible for school physical education, and there will be more advanced school sports teams when they join forces in a systematic manner to be appropriate for Korean circumstances.
김대광,황향희 江原大學校附設體育科學硏究所 2002 江原大學校附設體育科學硏究所論文集 Vol.- No.25
This study has the purpose of presenting the direction for the promotion of school physical education by analyzing the change and problems of school physical education in the past through administrative approach of physical education at present when government is to be changed in two months for the importance and developmental necessity of school physical education, and the conclusion is presented as the follows as the proposal through general analysis as the abobe. 1. Central organization of government shall be set up in order to control elite physical education, school physical education and sport for all professionally and generally and at the same time I think it is necessary to establish tentatively named "Operational and strategic committee for National physical education" under the rule of prime minister for the reformation of structural contradiction and problems of Korean physical education. 2. It is judged that school physical education shall be managed either by the ministry of education and human resources or by the minister of culture and tourism for complete transfer of the function they have. 3. Medium and long term development plan shall be made with government, school physical education teachers and the professional sports personnels participating. 4. It will be possible for us to establish professional physical education school such as the golf elementary school, jubo middle school, and Taekondo high school from elementary to high school. 5. It is necessary to include the concrete contents on school physical education in the promotion act of national physical education through amending and complementing current act extensively. 6. It is recommended that diverse and professional opinions shall be received from various fields of the sports for the execution and evaluation when establishing or deciding the policy of school physical education.