• Journal of the Korean Data and Information Science Society
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• v.21 no.1
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• pp.147-153
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• 2010

It is generally believed that teaching probability with the help of coin tossing has a long history. In textbooks about elementary probability or statistics, problems on unfair coins as well as fair ones are frequently given. However it is known that nobody has met an unfair coin with a fixed head probability which is different from 0.5 in flesh and blood. In this study a coin bent along with the middle line of the coin is suggested as an unfair one. By flipping bent coins with various angle, the ratios of head of the coins are obtained. The bent coins might be used as experimental tools for teaching of probability concept.

• Journal of Pharmacopuncture
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• v.9 no.2
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• pp.167-171
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• 2006

Objective : This study was to evaluate the effect of Bee venom-Acupuncture therapy on patients with sprain of the wrist. Methods : We investigated 31 cases of patients with sprain of the wrist. We flip a coin and divide patients into two groups. Bee venom-Acupuncture was performed at on group, and the other group we didn't do it. We evaluated the treatment effect of each group by using the visual analog scale(VAS). Results : 1. As a result of evaluation by using the VAS, the score after treatment was marked lower than that before treatment within each group. 2. After treatment, Bee venom-Acupuncture therapy group showed significant difference on visual analog scale(VAS) compared with acupuncture therapy group. Conclusion : These results suggested that Bee venom-Acupuncture treatment should be more effective in the patient with sprain of the Wrist joint.

• Journal of Acupuncture Research
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• v.23 no.4
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• pp.15-20
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• 2006

Objectives : This study was to evaluate the effect of Bee venom-Acupuncture on knee joint with osteoarthritis. Methods : We investigated 30 cases of patients with osteoarthritis of knee joint. We flip a coin and divide into two groups. Bee venom-acupuncture was performed at one group, and the other group didn't do it. We evaluated the treatment effect of each group by using the WOMAC score. Results : 1. As a result of evaluation by using the WOMAC, the score after treatment was marked higher than that before treatment within each group. 2. After treatment, Bee venom-Acupuncture group showed significant difference on WOMAC score compared with acupuncture group. Conclusion : These results suggested that Bee venom-Acupuncture treatment should be more effective in the patient with osteoarthritis of knee joint.

• Journal of Acupuncture Research
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• v.22 no.4
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• pp.121-129
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• 2005

Objectives : This study was to evaluate the effect of electroacupuncture on symptoms of peripheral facial paralysis. Methods : We investigated 34 cases of patients with Peripheral Facial Paralysis. We flip a coin and divide into two groups. Electroacupuncture was performed at one group, and the other group didn't do it. we evaluated the treatment effect of each group by using Gross Grading System of House-Brackmann, Yanagihara's Unweighed Grading System. Results : 1. In Pain back of the ear, we found that two groups have no significant differences. 2. As a result of evaluation by using Gross Grading System of House-Brackmann, Yanagihara's Unweighed Grading System, treatment score after 2weeks was marked higher than that before treatment and treatment score after 4weeks treatment was higher than treatment score after 2weeks within each group. 3. After 4weeks treatment, electroacupuncture group showed significant difference on Gross Grading System of House-Brackmann, Yanagihara's Unweighed Grading System compared with acupuncture group. Conclusion : These results suggested that electroacupuncture treatment should be more effective in the patient with peripheral facial paralysis.

• Journal of Periodontal and Implant Science
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• v.42 no.2
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• pp.45-49
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• 2012

Purpose: The aim of the present clinical trial was to compare pain during injection of anterior middle superior alveolar (AMSA) technique with that of infiltration injection technique in the maxilla in periodontal flap surgeries of patients referring to the Department of Periodontics, Faculty of Dentistry, Tabriz University of Medical Sciences. Methods: Twenty subjects with an age range of 20 to 40 years were selected for the present study. One side of the maxilla was randomly selected as the test side and the other as the control side using a flip of a coin. AMSA technique was used on the test side and infiltration technique was used on the control side for anesthesia. On both sides 2% lidocaine containing 1:80,000 epinephrine was used for anesthesia. The operator obtained the visual analogue scale for each patient immediately after the injection and immediately after surgery. Data was analyzed using descriptive statistical methods (frequency percentages, means and standard deviations) and Wilcoxon's test using SPSS ver. 13 (SPSS Inc.). Statistical significance was defined at P<0.05. Results: There were no statistically significant differences in pain during injection between the two techniques (P=0.856). There were statistically significant differences in postoperative pain between the two injection techniques (P=0.024). Conclusions: Postoperative pain in AMSA injection technique was less than that in the infiltration technique. Therefore, the AMSA technique is preferable in the periodontal surgeries for the anesthesia of palatal tissues given the fact that it has other advantages, too.