• 대한한의학회지
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• 제18권1호
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• pp.278-298
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• 1997

This study was performed to prove the antioxidant activities of Cynanchum Wilfordii Hemsley(白何首烏) by way of aqua- acupuncture methods. After 10% & 20% concentrations of liquid extract of Cynanchum Wilfordii Hemsley were acupunctured on Joksamri(足三里) of rats with acute and chronic experimental oxidation by AAPH(2, 2'-azobis(aminoidinopropane), hydrochoride), various kinds of experiments were measured. The results were obtained as follows: 1. In acute antioxidant experiment, the amount of TBARS indicated irregular increase and decrease to over 68% in experiment group in comparison with normal group. 2. In the serum test of acute antioxident experiment, uric acid and total protein and albumin were significantly increased in experiment group in comparison with control group. 3. In chronic antioxident experiment, the change of body weight was significantly decreased in 20% experimental groups in comparison with control group, and only liver significantly increased in 10% & 20% experiment group. 4. In chronic antioxident experiment, total protein significantly increased in 10%, 20% experimental groups and creatinine and BUN were significantly decreased in 10% experiment group. 5. In the chronic antioxident experiment, serum GOT, GPT activity didn't show no significantly change, LDH activity was significantly increase in 10% experiment group in comparison with control group. 6. In the chronic antioxident experiment, the tolerance test with enzyme activities of erythrocyte membrane was significantly decreased in 10% & 20% experimental groups. 7. In the chronic antioxident experiment, the change of TBA was significantly decreased in 10% & 20% experimental group. 8. In the chronic antioxident experiment, the amount of cytochrome p-450 was significantly increased in 10% & 20% experimental groups in comparison with control group. 9. In the chronic antioxident experiment, the amount of cytochrome b5 was significantly increase in 20% experimental group in comparison with control group. 10. In the chronic antioxident experiment, the change of activity of superoxide dismutase, and catalase were significantly increased in 20% experiment group in comparison with control group. From the above result, it was concluded considers the liquid extract of Cynanchum Wilfordii Hemsley(白何首烏) could be used as antiaging drugs, because it delayed the aging process and retarded senility.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2007년도 정기 학술대회 논문집
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• pp.451-456
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• 2007

A finite element analysis and experiment study of a motorcycle helmet are presented in this paper. The finite element LS-DYNA3D code is used to analyze the helmet. The test specimen, instruments, and setup procedures are described. Since the displacements and Von-Mises stresses obtained by numerical analysis and experiment agree well, the numerical simulation is proved to be valid.

• 한국작물학회:학술대회논문집
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• 한국작물학회 1990년도 추계 학술대회지
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• pp.26-27
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• 1990

• 대한정형도수물리치료학회지
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• 제11권1호
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• pp.29-36
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• 2005

The purpose of this study was to evaluate change of path length center of body on sacroiliac joint mobilization. The subjects were consisted of sixty healthy adult two decade(28 females. 32 males; mean aged 22.2) from 20 to 29. All subjects randomly assigned to the control group, sacroiliac joint mobilization group. sacroiliac joint mobilization group received sacroiliac joint mobilization for 2-3 minutes per day and three times a week during 3 weeks period. The study carried out to determine the change of path length center of body on sacroiliiac joint mobilization from July 1, 2004 through september 30, 2004. Active balancer(SAKAI EAB-100) was used to measure equilibrium ability. All measurements of each subjects were measured at pre-experiment and post-experiment. The results of this study were summarized as follows: 1. The WPL of control group, sacroiliac joint mobilization group was no significantly differences at pre-experiment but significantly reduced post-experiment(p<.05). The results of analyzed effects of WPL was significantly reduced between experiment type of control group, sacroiliac joint mobilization group according to pre-experiment and post-experiment(p<.05). 2. The UPL of control group, sacroiliac joint mobilization group was no significantly differences at pre-experiment but significantly reduced post-experiment(p<.05). The results of analyzed effects of UPL was significantly reduced between experiment type of control group, sacroiliac joint mobilization group according to pre-experiment and post-experiment(p<.05). Conclusionally these data suggest that a 3-week S-I joint mobilization improved equilibrium. Additional randomized controlled trials to more fully investigate treatment effects and factors that may mediate these effects are needed.

• 대한수학교육학회지:학교수학
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• 제15권2호
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• pp.221-241
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• 2013

이 연구에서는, Inhelder와 Piaget(1963)의 실험의 여러 측면에 대해 고찰하면서, Piaget의 발생적 인식론에서 '문제의식의 형성', '연구문제로의 변환', '실험과제로의 번역', '실험결과의 해석' 과정의 특징을 드러낸다. 그리고 이러한 일련의 분석을 바탕으로 하여, Piaget의 발생적 인식론의 실험 결과가 학생의 의식성을 높이는 교육을 지지한다는 점에 대해 논의한다.

• 농촌계획
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• 제12권4호
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• pp.99-114
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• 2006

Under awareness of the importance of interaction between local research agencies and farmers in developing local agriculture, this study attempts to analyse the level of interaction in extension services of Experiment Station. The data were collected through the interview with researchers in five Experiment Stations and farmers who have made contact with the researchers. The results of the analysis are as follow: (1) The Experiment Stations are currently providing extension services though they are originally research-oriented agencies. The extension methods of Experiment Stations are similar with those of extension agencies. (2) The more systematic the characteristic of extension service type is, the higher level of interaction is generated with several exceptions which should not be ignored. This study accentuates the efforts to improve the level of interaction as well as to construct a system as a linked set of actors.

• 공학교육연구
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• 제15권2호
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• pp.46-51
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• 2012

This work investigated experiment education in mechanical engineering of universities in USA. Through the investigation, characteristics of each university were analyzed. Finally, the study suggested new contents of experiment education, full-time professors and staffs for experiment, cooperation with design and experiment education, and incentive for the development of experiment education.

• 한국초등과학교육학회지:초등과학교육
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• 제43권2호
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• pp.269-283
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• 2024

본 연구는 '기체가 공간을 차지하고 있음을 알아볼 수 있는 실험'이 2015 국정 과학 교과서와 검정 교과서에 제시된 특성을 비교하고, 실험의 타당도 검사 및 문제점을 파악하여 이를 개선하고, 그 효과성을 검증해보고자 하였다. 이를 위해 첫째, 국정 교과서와 검정 교과서 7종의 주요 준비물, 실험 방법, 제시된 사례를 분석한 결과 5개 교과서(71.4%)의 실험이 국정 교과서의 실험과 같거나 거의 유사하게 구성된 것으로 나타났다. 따라서 과학교과서의 다양성과 창의성을 확보하기 위해 다양한 종류의 교과서가 개발되었지만 대부분 기존에 제시되어 있던 실험을 그대로 제시하고 있었다. 둘째, 현행 실험의 경우 학생에게 다소 어려운 추론 능력을 요구하고 있고, 구체적이며 직관적인 관찰이 어렵다는 문제점이 있었다. 또한 초등학교 교사는 현행 실험의 타당도가 매우 낮다고 응답하였다. 셋째, 개선된 실험은 타당도가 높은 것으로 나타났으며, 실험 집단의 경우 비교 집단과 비교하여 사후 검사에서 통계적으로 유의한 차이가 있는 것으로 나타나 개선된 실험이 학생들의 탐구능력 함양에 효과가 있는 것으로 나타났다. 그리고 개선된 실험은 컵 속의 물과 공기를 시각적으로 구분할 수 있고, 감각을 통해 현상을 직접 관찰할 수 있으며, 학생 수준에 적합한 활동으로 구성된 것으로 분석되었다. 따라서 본 연구는 '기체가 공간을 차지하고 있음을 알아볼 수 있는 실험'을 직접 지도한 경험이 있는 초등학교 3학년 교사를 대상으로 의견수렴과 협의 과정을 통해 현행 실험의 문제점을 찾고, 개선된 실험을 개발하며, 그 효과를 검증하여 현재 개발되고 있는 2022 검정 과학과 교과서에 시사점을 주고자 하였다.

• 한국초등과학교육학회지:초등과학교육
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• 제23권2호
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• pp.152-158
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• 2004

The purpose of this study was to find the difficulties and problems in the carbon dioxide production experiment and to suggest the device for the improvement. Many students have misconception for the smell of carbon dioxide. I found that the smell of carbon dioxide of producting through the experiment didn't concern with the quantity of calcium carbonate. I certificated that the smell of carbon dioxide was related with the concentration of hydrochloric acid. I built two trap applicaing suction in the gas production device to exclude fully the smell of carbon dioxide. So the smell of carbon dioxide was not present by passing the two trap. To find the ideal experimental conditions I perform the experiment step by step. As the result enough carbon dioxide to use for the property experiment was collected under the condition that is 60 mL of 3 molarity hydrochloric acid and 30 g calcium carbonate. I certificated to mesuring flowing quantity of carbon dioxide using the flow meter of carbon dioxide. In the improvement experiment of the property of carbon dioxide, I proposed the experiment device regarding as spreading of the gas and children's interest. To improve the problem of gas production experiment, I proposed the gas certification device using a thread.

• 한국약용작물학회:학술대회논문집
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• 한국약용작물학회 2008년도 추계학술발표회
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• pp.221-222
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• 2008