• 대한물리의학회지
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• 제9권3호
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• pp.279-284
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• 2014

PURPOSE: This study intended to verify whether there was actual correlation between weight-bearing asymmetry and a limitation in hip joint rotation range in patients with low back pain. METHODS: Thirty five low back pain patients voluntarily participated this study. For each participant, hip joint medial rotation symmetry rate and the weight-bearing symmetry rate were calculated. The correlation between the two variables was investigated. RESULTS: A decrease in the left hip joint medial rotation range of motion (ROM) was observed more often than a reduction in the right hip joint medial rotation ROM. However, similar number between right and left side was observed in ground reaction force more weighted. The coefficient between the passive hip joint medial rotation symmetry rate and the weight loading symmetry ratio was -0.19 (p < 0.05). CONCLUSION: The present study demonstrated a weak correlation between the hip joint medial rotation ROM and the weight distribution of both feet. Such result suggests that careful evaluation by separating each element is needed in treating patients with low back pain. Future research should take into account asymmetric alignment and abnormal movement in different joints of the body as well as asymmetry in the bilateral hip joint rotation and the unilateral weight supporting posture.

• 한국생활과학회지
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• 제10권3호
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• pp.291-301
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• 2001

The purpose of this study is to provide the apparel manufacturers who have not been effectively preparing for worldwide trends of rapid increase in overweight population with fundamental data to develop updated domestic market through the findings derived from the actual dissatisfaction factors in purchasing of a garment by overweight body customers excluded in the apparel industry. The results of study are as follows : Considering the relationships with dissatisfaction factors in purchasing ready-to-wear according to the interests in weight control, there is a slight difference in the partial intention from degree of self-recognition of body figure and interests in weight control and motivation of interests in weight control. As a results, first, the more recognition of obesity, the more dissatisfaction with "product variety" and "purchasing decision". Second, the more interests in weight control, the more dissatisfaction with product variety in purchasing of ready-to-wear. Third, the more self-recognition of obesity as the motivation of interests in weight control, there is a high dissatisfaction with product variety.

• 한국의류산업학회지
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• 제1권1호
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• pp.12-17
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• 1999

The actual clothing conditions were surveyed to diagnose clothing condition of collegians in the view point of adaptation to the thermal environment in fall. Then, clothing climate, physiological responses, and subjective sensation were investigated through wearing trials on human subjects in climatic chamber based on the results from the survey. Factors to evaluate validity of clothing condition were clothing weight, clothing climate, physiological responses of human body, and subjective sensation. Adaptability of this research to thermal environment was compared to the results of Toda's and Duno's of Japan, Chung's results of Korea rural area, and Winslow's clo value. The standard values for wearing trials were values at comfortable zone, such as $32{\pm}1^{\circ}C$ of temperature and $50{\pm}10%$ of humidity inside clothing, $36.5{\sim}37.3^{\circ}C$ of ear temperature and $32.2{\sim}34.3^{\circ}C$ of mean skin temperature. Clothing weight per body surface area was 680.9 $g/m^2$ in male and 526.7 $g/m^2$ in women. Cold resistance ability of collegians was superior to Japanese and American, and similar to rural male in Korea. According to the examination of clothing adaptability with clothing weight from the investigation on physiological responses and the actual clothing conditions survey, following were found. Temperature inside clothing ($29.8{\sim}32.3^{\circ}C$) was normal, and humidity inside clothing (32.2~54.8%) was at comfortable zone. Mean skin temperature was at its comfortable zone. Therefore, 615 $g/m^2$ in male and 525 $g/m^2$ in female were a desirable wearing condition.

• 성인간호학회지
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• 제14권1호
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• pp.53-61
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• 2002

Purpose: This descriptive study was designed to investigate Body Mass Index(BMI), weight control behavior, and self-esteem in high school adolescents. Method: The convenience sample consisted of 129 high school females and 106 high school males. Data were collected using a self-report questionnaire from November to December, 1999. BMI was calculated by using the subject's self-reported body weight and height to identify objective obesity. Self evaluation about subjective obesity was measured by a single item question. Preferred BMI was calculated by using the subject's elf-reported body weight and height which the subjects desired. The Rosenberg's Self-Esteem Scale was utilized to measure the level of self-esteem. Results: Results of the study revealed that high school females perceived themselves as more more obese than their the actual BMI, excessively participated in dieting behavior and exercises, and reported lower self-esteem than that of males. Conclusion: Based on this study, health care providers need to educate female adolescents about healthy behavior as well as the normal weight range in BMI.

• 한국의류학회지
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• 제18권5호
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• pp.615-621
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• 1994

This study was carried out to investigate the effect of clothing habit on physiological adaptation to the change of season. The survey of clothing weight in fall '||'&'||' winter for 2 years, the frequency of cold infection in winter and degree of fatigue was performed with 110 female high school students. The actual condition of clothing and the correlations between clothing weight and cold infection, and between the clothing weight and degree of fatigue were suveyed. The results are followed as; 1. The clothing insulation was nearly same to indoor standard clothing insulation in H hun wearing normal clothing, but was higher 2 clo in S hun clothed uniform. Especially in spite of similar enviromental condition the clothing weight, minimum '||'&'||' maximum and variation of clothing weight for 2 years were showed to be heavier in S hun than H hun. Also indoor thermal sensation felt by the subjects indicated "cold", and the difference between clothing insulation and standard clothing insulation showed increase gradually. 2. L group was indicated to be lower in cold infaction ratio than M '||'&'||' H group, and the correlation between clothing group and cold infection ratio was recognized to be significant (p<0.05). And H hun and L-H group showed to be lower in cold infection ratio than S hun, H-L group. 3. The coefficience between clothing weight and degree of fatigue was recognized to be significant (p<0.05).

• 건축역사연구
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• 제22권6호
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• pp.23-34
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• 2013

The purpose of this study is to look into the weight-lightening phenomenon of the roof structure of some Hanok(韓屋), the Korean traditional houses found from the survey on the distribution and actual state of urban traditional houses existing in the whole region of Jung-gu, Daegu, Korea. As a result of judging from the pre-test of building registers for the research area, approximately 5,000 wood structure houses were found. A field data survey based on these findings showed that there are 1,752 Hanok houses. And the further classification of the Korean traditional houses by roof structure type shows that about 35% of them underwent weight lightening. While this kind of light-weight Hanok is different from the concept of traditional Hanok, they also show the survival method of Hanok that reflects the economical and technological phases of that period. It is expected that deeper understanding on the urban traditional houses will be possible through carrying out in-depth researches on techniques of the light-weight roof structure of the urban traditional houses that are supposed to have functioned as dwellings as commercial products.

• 한국식품영양과학회지
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• 제27권5호
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• pp.1007-1014
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• 1998

A questionnaire was administered to 850 middle school students in Jinju city and Hamyang province to asses their body shape preferences. Their mean current BMI(body mass index, Kg/㎡) in males(19.23±2.77) was higher than that in females(18.61±2.59). On the other hand, significant differences in BMI were not found between areas. The perceived desired weights for their current height were about+0.22kg(males) and -4.32kg(females) of their actual weights. In spite of the average weight group, many wished to lose weight because of their tendency to perceive themselves as overweight, especially among rural females. Their ideal body shape as perceived by them were 'normal' in males and 'a bit thin' in females, independent of the areas. As for the 'contentment' regarding their current weight and health, the most satisfied group in males were estimated average weight and slightly overweight group, respectively. While, the most satisfied group in females were estimated slightly underweight and overweight group, respectively. Their extreme slim-body preference might have its root in the lack of proper understanding of what the 'standard' body weight was.

• Tribology and Lubricants
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• 제40권1호
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• pp.24-27
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• 2024

A monotype valve body for a dual clutch transmission has the potential to reduce costs, weight, and manufacturing time by modularizing various parts, including those of existing solenoid packs and valve bodies, into one through the application of super-precision die casting technology. However, this approach may lead to challenges such as reduced rigidity and increased interference due to modularization and compactness, impacting both product performance due to the reduced weight as well as durability and reliability. Unlike existing products, this approach requires a high-precision thin-wall block to avoid more complicated flow line formation, interference between flow lines, and leaks, as well as a strict quality requirement standard and precise inspections including detection of internal defects. To conduct precise inspections, we built an equivalent model corresponding to a driving distance of 300,000 km. Testing involved simulating actual road loads using a real vehicle and a chassis dynamometer in the FTP-75 mode (EPA Federal Test Procedure). The aim of the study was to establish a vehicle load-based part durability model for manufacturing a mono-type valve body and to develop fundamental technology for part weight reduction through preliminary design by introducing analytical weight reduction technology based on the derived results.

• 한국가금학회지
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• 제49권4호
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• pp.229-237
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• 2022

본 연구는 신품종 토종종계로부터 생산된 토종실용닭 4계통의 성장 특성을 규명하고 출하일령 추정에 적합한 모형을 제시하고자 실시하였다. 체중은 발생시부터 12주령까지 2주 간격으로 개체별로 측정하였으며 성장곡선의 추정은 Von Berteralanffy, Gompertz 및 Logistic 모형을 이용하였다. 분석 결과, 발생시 체중을 제외한 모든 주령에서 수컷이 암컷보다 무겁게 나타났고, 계통 간 체중은발생시, 2주령 및 6주령을 제외하고는 차이가 없는 것으로 나타났다. 모든 성장곡선 모형의 결정계수와 수정된 결정계수는 97.4~99.7로 높은 적합도를 나타내었다. 성장곡선 모수 중성숙체중과 성장률은 수컷이 암컷보다 높게 나타났고, 성숙률은 암컷과 수컷이 비슷한 값을 보였다. 변곡점은 모형과 계통 별 차이가 있으나 암컷은 약 7주령, 수컷은 8~9주령으로 나타나 성별 간 10일 정도의 차이를 나타내었다. 성장곡선 모형의 거의 대부분은 실제 체중과 잘 일치하나, Von Bertalanffy 모형에서 수컷의 체중이 실제 체중과 다소의 차이를 보였다. 출하일령 예측을 위한 회귀함수의 결정계수는 0.9583~0.9746으로 나타나 예측 값에 대한 신뢰도가 높게 나타났다. 성장 곡선과 회귀식을 사용하여 추정한 주령 별 체중 값은 8주령과 10주령은 회귀식을 이용한 추정 값이, 12주령 체중은 Logistic 모형으로 추정한 값이 실제 체중과 가장 비슷하게 나타났다. 이러한 성장곡선에 따른 토종닭의 2 kg 도달일령의 평균 예측일수는 수컷이 62.0~64.6일, 암컷은 74.9~78.6일로 추정된다.

• 대한기계학회논문집A
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• 제26권7호
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• pp.1357-1365
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• 2002

A robot hand is used to transport the glass substrate in TFT-LCD manufacturing process. Carbon/epoxy composite is one of the best materials for this kind of robot hand application, due to their lightweight, high stiffness, and good damping characteristics. Major requirement of the robot hand is given as allowable deflection under weight loading of glass substrate and robot hand itself. In this thesis, a carbon/epoxy robot hand was analyzed using finite element method and beam theory to determine the deflection of the hand under the loading that is equivalent to actual weight. Because natural frequency is one of the major interests in robot hand design for TFT-LCD manufacturing process, modal analysis is also conducted using finite element method and beam theory. A robot hand was manufactured, and actual deflection and natural frequency were measured to verify the analysis results and compliance to requirement. The test results showed good agreement with analysis results.