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과학그리기 활동을 활용한 초등학교 수업에서 학습자의 태양계 개념형성, 과학탐구능력, 과학과 관련된 태도 변화
전상일,신명경 한국현장과학교육학회 2015 현장과학교육 Vol.9 No.3
This study aimed to analyze students’ changes in terms of building the solar system conceptions, science related attitudes and science process skills through adopting scientific drawing activity in science class. Scientific drawing activity in this study involved a total of 52 fifth grade students of two groups of elementary school that located in Gyenggido, Korea. There were a total 10 class hours in ‘Lesson 4. Solar system and Stars’. One group was involved in a Scientific Drawing Activity class(25 students) and the other was a comparative group. This study found that there were significant improvements of students` solar system conceptions including composition of solar system, feature of planets, and the sun. Scientific drawing activity in this study was significantly effective in improvements of students` science related attitude and interests of science subjects as compared in existing classes. Students showed high learning interests in not simple arranging activity but science drawing activity. A few previous studies showed students, who poor in drawing, could be feel burden. But in this study showed students, who poor in drawing, having a high interest in science drawing activity. 본 연구는 과학 그리기 활동을 도입한 초등학교 과학 수업에서 나타나는 학습자의 태양계 개념 형성, 과학탐구능력, 과학에 관련된 태도 변화에 대해 분석하였다. 이를 위해 경기도 광주 G 초등학교 5학년 학생을 대상으로 5학년 2학기 4. 태양계와 별 단원으로 총 10차시에 걸쳐 과학그리기 활동을 계발하고 적용하였다. 그 결과는 다음과 같다. 첫째, 과학그리기 활동을 한 실험집단이 비교집단과 비교하여 태양계 개념 형성에 유의미한 효과가 있었다. 둘째, 과학그리기 활동을 한 실험집단이 비교집단과 비교하여 과학탐구능력 향상에 유의미한 효과가 있었다. 셋째, 과학그리기 활동을 한 실험집단이 비교집단과 비교하여 과학과 관련된 태도 향상에 유의미한 효과가 있었다. 넷째, 과학그리기 활동에 대한 학습자는 기존의 수업과 비교하여 흥미, 이해와 기억 효과에 대해 긍정적인 반응을 보였다. 또한 단순한 정리 활동 보다 과학그리기 활동에 대한 흥미도가 높은 것으로 나타났으며 그리기 능력에 소질이 없는 학습자도 그리기 활동에 흥미도가 높은 것으로 분석되었다.
전상일,이헌상 한국물리학회 2012 Current Applied Physics Vol.12 No.2
The electrical conductivity of amorphous polymer/multiwall carbon nanotube (MWCNT) composite films strongly depends on the Bernard-Marangoni (B-M) instability during solvent evaporation. We demonstrate that the films exhibit the lowest surface resistivity and the highest light transmittance near the onset point of B-M instability. The polymer/MWCNT composite films exhibit three-dimensional behavior in spite of the B-M instability. The percolation threshold for PC/MWCNT composite films at stable, onset,and unstable condition is 3.3 × 10-3, 2.75 × 10-3, and 5.15 × 10-3 vol.%, respectively.
건강한 성인 남성을 대상으로 Levodropropizine CR정반복 투여시의 약동학적 특성 및 안전성에 관한 연구
전상일,이종태,홍태곤,백정기,한승훈,임동석 대한임상약리학회 2013 Translational and Clinical Pharmacology Vol.21 No.2
Background: Levodropropizine is non-opioid agent whose peripheral antitussive action may result from its modulation of sensory neuropeptide levels. Currently, levodropropizine 60 mg is taken three-times daily. A controlled release formulation of levodropropizine (levodropropizine CR) 90 mg was developed, which can be taken twice daily. The aim of this study was to evaluate the safety and pharmacokinetic characteristics after multiple oral administrations of levodropropizine CR 90 mg tablets in healthy male volunteers. Methods: A randomized, open-label, cross-over study was conducted in 24 healthy male volunteers. Each subject received levodropropizine syrup 60 mg three times daily or levodropropizine CR 90 mg twice daily for 3 days. Blood samples for pharmacokinetic analysis were collected pre-dose and up to 24 hours on day 4. Pharmacokinetic analysis was conducted by non-compartmental method. Safety assessments including monitoring adverse events, laboratory tests, vital signs, physical examinations and ECGs were performed throughout the study. Results: A total of 20 male volunteers completed the study. The maximum steady-state plasma concentration (Css,max) of levodropropizine syrup and levodropropizine CR were 313.28 ng/mL and 285.31 ng/mL and time to reach Css,max (Tmax,ss) were 0.48 hr and 0.88 hr, respectively. The area under the concentration-time curve to the last measured concentration of two groups were 2345.36 hr × ng/mL and 2553.81 hr × ng/mL, respectively. There was no serious adverse event. Conclusion: Levodropropizine CR 90 mg tablet was safe and well-tolerated when administered twice daily for 3 days. No statistically significant differences were seen in Css,max and AUCss,24hr between the two formulations. This study provided pharmacokinetic evidences that the twice-daily dosing regimen of levodropropizine 90 mg may substitute the conventional 3-times-daily regimen of levodropropizine 60 mg.