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Renzulli 수학 영재 교수-학습 모형 적용에 관한 연구
남영만,박동암,Nam, Young-Man,Park, Dong-Am 영남수학회 2009 East Asian mathematical journal Vol.25 No.3
In this paper we apply to Renzulli's Teaching and Learning models for mathematically gifted students based on the gifted science education center in university. Gifted students were very positive reaction in solving problems creatively using this program, and they were challenging and very confident performing new tasks. They reacted variously in debates with their classmates, in self-initiative studying. So more positive changes are needed for the activities using the gifted learning-teaching program to let each student have full use of his or her possibility and potential.
CO<sub>2</sub>레이저 조사에 따른 치수강내 온도변화에 관한 실험적 연구
이종만,박동수,이찬영,이정석,Lee, Jong-Man,Park, Dong-Soo,Lee, Chang-Young,Lee, Chung-Suck 대한치과보존학회 1984 Restorative Dentistry & Endodontics Vol.10 No.1
The purpose of this study was to suggest the use of laser energy in the the field of operative dentistry without considerable pulpal damage and significant effects on the dental hard tissue, additionally to find out the methods which could control the temperature rise. The laser beam (CW $CO_2$ laser, output: 6W, beam diameter: 1.5mm) was focused on the center of the occlusal surface of extracted lower molars. A Ge lens (focal length 200mm) was used to focus the primary laser beam. In order to vary the total amount of the same irradiated energy, experimental subjects were devided into three groups: continuously irradiated group, intermittently irradiated group, and water-cooled group after continuous laser irradiation. Temperature changes in the pulp chamber after laser irradiation were measured and recorded by the digital thermometer and recorder. The following results were obtained: 1. Temperatures in the pulp chamber were raised up in the order of the continuously irradiated group, intermittently irradiated group, water-cooled group after continuous laser irradiation. 2. In the continuously irradiated group, the temperature was raised up $1.7^{\circ}C$, $3.8^{\circ}C$, $7.3^{\circ}C$, $17.2^{\circ}C$ after 2, 4, 8, 16 seconds of the irradiation of laser. In the intermittently irradiated group, the changes were $1.2^{\circ}C$, $3.4^{\circ}C$, $6.3^{\circ}C$, $11.1^{\circ}C$, respectively. In the water-cooled group after continuous laser irradiation, the changes were $0.0^{\circ}C$, $0.8^{\circ}C$, $1.6^{\circ}C$, $6.9^{\circ}C$, respectively. 3. The starting time of temperature rise in the pulp chamber had no connection with laser irradiation time.