• The Journal of Korean Medicine
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• v.18 no.1
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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.

• Proceedings of the Computational Structural Engineering Institute Conference
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• 2007.04a
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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.

• Proceedings of the Korean Society of Crop Science Conference
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• 1990.10a
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• pp.26-27
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• 1990

• The Journal of Korean Academy of Orthopedic Manual Physical Therapy
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• v.11 no.1
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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.

• School Mathematics
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• v.15 no.2
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• pp.221-241
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• 2013

This study considers the experiment of Inhelder and Piaget(1963) in various aspects, and reveals the characteristics of the 'the formation of a critical mind', 'the transformation into the research question', 'the translation into the experiment', and 'the interpretation of the result of the experiment' in Piaget's genetic epistemology. According to these analyses, this study discusses the educational implications that the results of the Piaget's experiment support the education which raises the student's awareness.

• Journal of Korean Society of Rural Planning
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• v.12 no.4 s.33
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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.

• Journal of Engineering Education Research
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• v.15 no.2
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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.

• Journal of Korean Elementary Science Education
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• v.43 no.2
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• pp.269-283
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• 2024

This study compared the characteristics of an experiment f or determining whether gas occupies space presented in elementary school science textbooks to examine the validity of the experiment, identify and improve problems in its presentation, and verify its effectiveness. This study interviewed third-year elementary school teachers who had experience teaching this experiment to students. Based on teachers' opinions and observations, this study identified issues with the current experiment, developed an improved experiment, and determined its effectiveness. Through this analysis, three key findings emerged. First, the study found that the original experiment on gases was presented in the same or highly similar manner in 5 of 7 textbooks (71.4%). Thus, while various textbooks have been developed with the aim of promoting diversity and creativity in scientific literature, most experiments presented in these books are identical. Second, the existing experiment was not suitable for its target audience (third-year elementary school students) and was difficult to observe directly. The interviewed teachers also deemed the validity of the experiment to be considerably low. Finally, the original experiment was improved; this improved version was determined to be highly valid, showing a statistically significant difference compared with the original experiment. The improved experiment was effective for students as it involved activities suitable for their intellectual level and was directly observable through the senses. Thus, the study analyzed and improved an existing science experiment f or elementary students, providing insights into the 2022 revised science authorized textbooks and implications for future textbook development.

• Journal of Korean Elementary Science Education
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• v.23 no.2
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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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• 2008.11a
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• pp.221-222
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• 2008