• 산업공학
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• 제18권4호
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• pp.444-453
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• 2005

The purpose of the Gage R&R study is to determine whether a measurement system is adequate for monitoring a process. If the measurement system variation is small relative to the process variation, then the measurement system is deemed "adequate". The sources of variation associated with the measurement system are compared using an analysis of variance (ANOVA) model, in general. A typical ANOVA model used in a standard Gage R&R study is the two-factor random effect model. Then, the ANOVA partitions the total variation into three categories: repeatability, reproducibility, part variation. However, if the process variation possesses the between group variation, within group variation, and within part variation, these variations can cause the measurement system evaluation to provide misleading results. That is, in the standard Gage R&R study these variations affect the estimate of repeatability, reproducibility, or both. This paper presents a four-factor nested factorial ANOVA model which explicitly considers these variations for the Gage R&R study. The variance component estimators are derived by setting the EMS equations equal to the corresponding mean square from the ANOVA table and solving. And the proposed model is compared with the standard Gage R&R model.

• 한국경영과학회:학술대회논문집
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• 한국경영과학회/대한산업공학회 2005년도 춘계공동학술대회 발표논문
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• pp.975-982
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• 2005

The purpose of the Gage R&R study is to determine whether a measurement system is adequate for monitoring a process. If the measurement system variation is small relative to the process variation, then the measurement system is deemed 'adequate'. The sources of variation associated with the measurement system are compared using an analysis of variance (ANOVA) model, in general. A typical ANOVA model used in a standard Gage R&R study is the two-factor random effect model. Then, the ANOVA partitions the total variation into three categories: repeatability, reproducibility, part variation. However, if the process variation possesses the between group variation, within group variation, and within-part variation, these variations can cause the measurement system evaluation to provide misleading results. That is, in the standard Gage R&R study these variations affect the estimate of repeatability, reproducibility, or both. This paper presents a four-factor nested factorial ANOVA model which explicitly considers these variations for the Gage R&R study. The variance component estimates are derived by setting the EMS equations equal to the corresponding mean square from the ANOVA table and solving. And the proposed model is compared with the standard Gage R&R model.

• The Journal of Korean Physical Therapy
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• 제13권3호
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• pp.685-692
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• 2001

Study the variation of low frequency electrical stimulation on human metabolism which serum to test the increasement of creatine- kinase, myoglobin, lactate .and pyruvate. The results were as followed: 1) Creatine kinase increasement showed significant difference between 200 Hz stimulation group and control group, and also between 300Hz stimulation group and control group, but no significant increasement difference showed in 50 Hz stimulation group compared to control group. 2) Lactate increasement showed significant difference in 200 Hz stimulation group and 300 Hz stimulation group compared to control group, but no significant difference showed in 50 Hz stimulation group. 3) Pyruvate increasement showed significant difference in 50 Hz stimulation group and 200 Hz stimulation group compared to control group, but no significant increasement difference showed between 50 Hz stimulation group and control group. (P < 0.05) 4) Myoglobin increasement showed significant difference in 50Hz stimulation group and 200 Hz stimulation group compared to control group, and also in 200 Hz stimulation group and 300 Hz stimulation group compared to 50Hz stimulation group. ( P < 0.05)

• 보건교육건강증진학회지
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• 제13권1호
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• pp.117-127
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• 1996

The purpose of this study was to investigate the variation in constituent element of blood between the massage group and non-massage group for period of convalescence after giving intense physical exercise of 180beat/min. for 10 men studying physical exercises. Education in K university served as the subjects for this study. The following are the results of the study. 1. The variation in white blood corpuscles showed a tendency of equal ascension in both groups just after finishing physical exercise, but the subjects in the massage group showed quicker recuperation than the subjects in the non-massage. The subjects in the massage group showed a lower tendency than the subjects in the non-massage group for 30minutes after finishing physical exercise. 2. In the variation of red blood corpuscles, it was increased in the massage and non-massage group after physical exercise, but it showed a tendency to drastically decrease in the massage group after 30 minutes. 3. Hemoglobin showed a variation increasing in the massage group and non-massage group after physical exercise, but it showed a tendency of rapid decrease in the massage group after 30 minutes. 4. In the variation of hematocrit, it showed a tendency of similar increase after physical exercise in the massage and non-massage group, but the subjects in the massage group showed a higher decrease than ones in the non-massage after 30 minutes. 5. Blood platelet was increased in the subjects of the massage group after physical exercise, but it was decreased drastically after 30 minutes. 6. In the variation of blood glucose, it was increased in the subjects in the massage group and decreased in the non-massage group after physical exercise, but it showed a tendency of rapid decrease in the non-massage group after 30 minutes.

• Imaging Science in Dentistry
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• 제44권2호
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• pp.95-102
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• 2014

Purpose: This study was performed to evaluate the reproducibility of panoramic radiographs of dentulous and edentulous patients. Materials and Methods: The reproducibility of panoramic radiographs was evaluated using the panoramic radiographs acquired from 30 anterior dentulous patients by using a common biting positioning device (dentulous group) and 30 anterior edentulous patients by using chin-support devices to take a panoramic radiograph (edentulous group), respectively; these patients had undergone 3 or more panoramic radiographs. The widths and angles between the designated landmarks were measured on the panoramic radiographs, and the reproducibility was evaluated using the intraclass correlation coefficient (ICC) and the coefficient of variation. Results: In the dentulous and edentulous groups, the ICCs of the mandibular ramus and mandibular angle areas were higher than the condylar head and zygomatic areas. The mandibular ramus and angle areas showed statistically lower mean coefficients of variation than the condylar head and zygomatic areas in the dentulous group. The mandibular angle area showed a significantly lower mean coefficient of variation than the zygomatic area in the edentulous group. By comparing the two groups, each ICC of the edentulous group was lower than that of the dentulous group, and the mean coefficients of variation of the mandibular ramus area, zygomatic area, left condylar inclination, and ramus ratio between the right and the left in the edentulous group were significantly higher than those in the dentulous group. Conclusion: Biting positioning for dentulous patients provided better positioning reproducibility than chin-support positioning when performing panoramic radiography for edentulous patients.

• 한국의류학회지
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• 제23권3호
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• pp.483-494
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• 1999

This study investigated the relation between seasonal variation of clothing weight and its resting metabolic rate to determine the relation between proper living temperature and cold/heat tolerance. Thirty six subjects(18 males and females twenties) were composed to obtain the clothing weight(Total clothing weight) and resting metabolic rate for a year and grouped four seasons : spring (Mar-May) Summer(Jun-Aug) Fall(Sep-Nov) and Winter(Dec-Feb). The data of males and females were respectively divided into three groups by cluster analysis with clothing weight. 1. The resting metabolic rate of male(41.1kcal/m2/hr) was higher than that of female(33.2kcal/m2/hr). It is suggested there is gender difference in the resting metabolic rate(p<.001) 2. The resting metabolic rate of male and female was the highest in Winter. It is suggested there is seasonal variation in the resting metabolic rate(p<.001) 3. It was found that there was relation between clothing weight and resting metabolic rate. The difference of resting metabolic rate between Summer and Winter which is profitable to adaptation to living temperature was significant in light clothing weight in male as well as in female. 4. In comfortable sensation most subjects responded that he/she felt 'comfortable' except Winter. However the heavy clothing weight group felt 'a little uncomfortable' throughout all seasons. l In thermal sensation most subjects responded that he/she felt 'neutral' And then the heavy clothing weight group responded warmer in summer and cooler in winter than light clothing weight group. From the results it was confirmed that male and female showed seasonal variations in clothing weight and resting metabolic rate. Also the resting metabolic rate of male and female was influenced by the clothing weight. In short seasonal variation of resting metabolic rate was larger in light clothing weight group than in heavy clothing weight group. Therefore light clothing weight group is advantgeous in living temperature to improve cold/heat tolerance and it also shows that living with the light clothing weight may enhance the degree of adaptation to change of living environment

• Journal of Acupuncture Research
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• 제28권5호
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• pp.121-126
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• 2011

Objectives : The aim of the study is to investigate the characteristics of Ryodoraku score accoding to Sasang constitution in the low back pain patients. Methods : For Roydoraku score examination, we made a comparison between 44 patients who were diagnosticated to low back pain(LBP group) and 35 persons who were not(non-LBP group). 1. We campared the variation from physiologic range of 12 Roydoraku points between LBP and non-LBP group. 2. We campared the variation from physiologic range of 12 Roydoraku points according to Sasang constitution between LBP and non-LBP group. 3. We campared the variation from physiologic range of 12 Roydoraku points according to Sasang constitution in LBP and non-LBP group. Results : 1. The score of H2 H5 F5 had statistical differences. 2. The score of H3 H5 F5 had statistical differences in Soeumin. 3. The score of H3 F4 had statistical differences in LBP gorup. Conclusions : These results suggest that roydoraku maybe used to evaluate low back pain patients.

• 대한지역사회영양학회지
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• 제3권3호
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• pp.423-429
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• 1998

This study examined within- and between-person variation in nutrient intakes in order to estimate the degree of precision in dietary assessment among 37 males and 46females whose mean age was 70.4 years old. To collect dietary data, each subject was interviewed 5 or 6 times using a 24-hour recall method during a 3 month period. Within- person variation ranged from 23.5% to 101.2%. Lower values of within-person variation were observed in energy, carbohydrated, protein and phosphorous while higher value was observed in vitamin A. Between person variations of nutrient intakes ranged 12.6-23.5% in most nutrients. With 1 day dietary data, observed nutrient intakes were estimated to within 6-25% of the group's usual9true) intakes and 52-198% of the individuals' usual intakes. The values of these maximum percentage deviations became smaller when the number of dietary recalls increased. The results of this study suggest that the Korean elderly subjects appear to have a slightly less diverse diet compared to young Korean women. Within persons, intakes of nutrients largely from animal sources were more variable for the Korean elderly than for their counterparts in Western countries. This study also implies that commonly used 1 day dietary study may be appropriate for assessing group means of nutrient intakes, but clearly not appropriate for assessing individual's nutrient intakes.

• 대한임상검사과학회지
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• 제36권2호
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• pp.252-257
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• 2004

The purpose of this study was to investigate the variation in constituent element of blood between the massage group and non-massage group in the period of convalescence after giving intense physical exercise for ten T'ae-Kwondo martial artists. In the variations of red blood cells, white blood cells, hematocrit, hemoglobin and blood platelet, levels decreased during the rest time after physical exercise, but the subjects in the massage group showed lower tendency than the subjects in the non-massage group after physical exercise. The variation of calcium showed an ascension tendency in the massage group after physical exercise. Creatine phosphokinase was increased after physical exercise, but it showed a tendency of rapid decrease in the massage group. Lactic acid showed a variation increase after physical exercise. It showed a tendency of decrease during the rest time in the non-massage group, but it was increased after sports massage. The variation of blood glucose was increased after physical exercise. It was maintained in the massage group after physical exercise in contrast to the non-massage group whose levels decreased during the rest time.

• 수면정신생리
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• 제8권1호
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• pp.30-36
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• 2001

배 경 : 주간기분변동은 주요 우울장애, 멜랑콜리아 형의 세부진단으로 포함되어 있다. 그러나 현재까지의 연구를 종합해 보면 주간기분변동은 우울증의 고유한 증상인지 수면 양상의 변화와 관련된 현상인지, 혹은 별개의 다른 기전을 갖는 현상인지에 대해서 서로 모순되는 주장들이 혼재되어 있다. 이에 본 연구에서는 우울증의 세부 진단에 따른 주간 기분변동의 유무를 조사하고, 주간기분변동의 유무에 따른 수면 양상의 차이를 비교함으로써 주간기분변동과 수면 양상 사이의 관계를 찾아 보고자 하였다. 방 법 : 입원 혹은 의뢰된 우울장애 환자 62명을 대상으로 하여 주간기분변동은 Visual Analogue Mood Scale로, 수면 양상은 Pittsburgh Sleep Quality Index, 우울증의 심각도는 Hamilton Depression Rating Scale을 이용하여 측정하였다. 주간기분변동이 있는 군과 없는 군으로 나누고 HDRS 총점과 소항목, 그리고 PSQI 총점과 소항목을 변수로 하여 통계적 분석을 시행하였다. 결 과 : 주간기분변동의 빈도는 각각의 진단별로 차이가 없었으며, 주간기분변동이 있는 군과 없는 군으로 나누었을 때 중기 불면증과 수면 시간에 있어서 유의한 차이가 있었다(p<0.05). 또한 멜랑콜리아 형만을 대상으로 주간기분변동이 있는 군과 없는 군을 비교하였을 때 중기 불면증, 수면 시간뿐만 아니라 PSQI 총점, 수면 잠복기, 수면 장애, 주간의 기능 면에서 유의한 차이를 보였다(p<0.05). 결 론 : 주간기분변동은 멜랑콜리아 형의 우울장애 뿐만 아니라, 다른 우울장애에서도 존재하기 때문에 주간기분변동이 멜랑콜리아 형 우울장애의 특유한 증상으로 보기는 어려웠다. 주간기분변동이 있는 군에서 수면의 질이 더 좋은 것으로 나타났는데 이는 수면과 관련될 가능성이 높으며 향후 심도있는 연구가 필요할 것이다. 주간 기분변동은 외부 환경의 영향을 받기 쉬움으로 신뢰성을 높이기 위해서는 측정 기간과 횟수 등의 방법론적 연구도 필요할 것으로 생각된다.